CONFIG_AG71XX=y
+# CONFIG_AG71XX_DEBUG is not set
+CONFIG_AG71XX_DEBUG_FS=y
CONFIG_AR8216_PHY=y
CONFIG_AR8216_PHY_LEDS=y
CONFIG_ARCH_32BIT_OFF_T=y
+++ /dev/null
-config AG71XX
- tristate "Atheros AR7XXX/AR9XXX built-in ethernet mac support"
- depends on ATH79
- select PHYLIB
- help
- If you wish to compile a kernel for AR7XXX/91XXX and enable
- ethernet support, then you should always answer Y to this.
-
-if AG71XX
-
-config AG71XX_DEBUG
- bool "Atheros AR71xx built-in ethernet driver debugging"
- default n
- help
- Atheros AR71xx built-in ethernet driver debugging messages.
-
-config AG71XX_DEBUG_FS
- bool "Atheros AR71xx built-in ethernet driver debugfs support"
- depends on DEBUG_FS
- default n
- help
- Say Y, if you need access to various statistics provided by
- the ag71xx driver.
-
-endif
+++ /dev/null
-#
-# Makefile for the Atheros AR71xx built-in ethernet macs
-#
-
-ag71xx-y += ag71xx_main.o
-ag71xx-y += ag71xx_gmac.o
-ag71xx-y += ag71xx_ethtool.o
-ag71xx-y += ag71xx_phy.o
-
-ag71xx-$(CONFIG_AG71XX_DEBUG_FS) += ag71xx_debugfs.o
-
-obj-$(CONFIG_AG71XX) += ag71xx_mdio.o
-obj-$(CONFIG_AG71XX) += ag71xx.o
+++ /dev/null
-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
- *
- * Based on Atheros' AG7100 driver
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#ifndef __AG71XX_H
-#define __AG71XX_H
-
-#include <linux/kernel.h>
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/random.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/ethtool.h>
-#include <linux/etherdevice.h>
-#include <linux/if_vlan.h>
-#include <linux/phy.h>
-#include <linux/skbuff.h>
-#include <linux/dma-mapping.h>
-#include <linux/workqueue.h>
-#include <linux/reset.h>
-#include <linux/of.h>
-#include <linux/mfd/syscon.h>
-#include <linux/regmap.h>
-
-#include <linux/bitops.h>
-
-#include <asm/mach-ath79/ar71xx_regs.h>
-#include <asm/mach-ath79/ath79.h>
-
-#define AG71XX_DRV_NAME "ag71xx"
-
-/*
- * For our NAPI weight bigger does *NOT* mean better - it means more
- * D-cache misses and lots more wasted cycles than we'll ever
- * possibly gain from saving instructions.
- */
-#define AG71XX_NAPI_WEIGHT 32
-#define AG71XX_OOM_REFILL (1 + HZ/10)
-
-#define AG71XX_INT_ERR (AG71XX_INT_RX_BE | AG71XX_INT_TX_BE)
-#define AG71XX_INT_TX (AG71XX_INT_TX_PS)
-#define AG71XX_INT_RX (AG71XX_INT_RX_PR | AG71XX_INT_RX_OF)
-
-#define AG71XX_INT_POLL (AG71XX_INT_RX | AG71XX_INT_TX)
-#define AG71XX_INT_INIT (AG71XX_INT_ERR | AG71XX_INT_POLL)
-
-#define AG71XX_TX_MTU_LEN 1540
-
-#define AG71XX_TX_RING_SPLIT 512
-#define AG71XX_TX_RING_DS_PER_PKT DIV_ROUND_UP(AG71XX_TX_MTU_LEN, \
- AG71XX_TX_RING_SPLIT)
-#define AG71XX_TX_RING_SIZE_DEFAULT 128
-#define AG71XX_RX_RING_SIZE_DEFAULT 256
-
-#define AG71XX_TX_RING_SIZE_MAX 128
-#define AG71XX_RX_RING_SIZE_MAX 256
-
-#ifdef CONFIG_AG71XX_DEBUG
-#define DBG(fmt, args...) pr_debug(fmt, ## args)
-#else
-#define DBG(fmt, args...) do {} while (0)
-#endif
-
-#define ag71xx_assert(_cond) \
-do { \
- if (_cond) \
- break; \
- printk("%s,%d: assertion failed\n", __FILE__, __LINE__); \
- BUG(); \
-} while (0)
-
-struct ag71xx_desc {
- u32 data;
- u32 ctrl;
-#define DESC_EMPTY BIT(31)
-#define DESC_MORE BIT(24)
-#define DESC_PKTLEN_M 0xfff
- u32 next;
- u32 pad;
-} __attribute__((aligned(4)));
-
-#define AG71XX_DESC_SIZE roundup(sizeof(struct ag71xx_desc), \
- L1_CACHE_BYTES)
-
-struct ag71xx_buf {
- union {
- struct sk_buff *skb;
- void *rx_buf;
- };
- union {
- dma_addr_t dma_addr;
- unsigned int len;
- };
-};
-
-struct ag71xx_ring {
- struct ag71xx_buf *buf;
- u8 *descs_cpu;
- dma_addr_t descs_dma;
- u16 desc_split;
- u16 order;
- unsigned int curr;
- unsigned int dirty;
-};
-
-struct ag71xx_int_stats {
- unsigned long rx_pr;
- unsigned long rx_be;
- unsigned long rx_of;
- unsigned long tx_ps;
- unsigned long tx_be;
- unsigned long tx_ur;
- unsigned long total;
-};
-
-struct ag71xx_napi_stats {
- unsigned long napi_calls;
- unsigned long rx_count;
- unsigned long rx_packets;
- unsigned long rx_packets_max;
- unsigned long tx_count;
- unsigned long tx_packets;
- unsigned long tx_packets_max;
-
- unsigned long rx[AG71XX_NAPI_WEIGHT + 1];
- unsigned long tx[AG71XX_NAPI_WEIGHT + 1];
-};
-
-struct ag71xx_debug {
- struct dentry *debugfs_dir;
-
- struct ag71xx_int_stats int_stats;
- struct ag71xx_napi_stats napi_stats;
-};
-
-struct ag71xx {
- /*
- * Critical data related to the per-packet data path are clustered
- * early in this structure to help improve the D-cache footprint.
- */
- struct ag71xx_ring rx_ring ____cacheline_aligned;
- struct ag71xx_ring tx_ring ____cacheline_aligned;
-
- int mac_idx;
-
- u16 desc_pktlen_mask;
- u16 rx_buf_size;
- u8 rx_buf_offset;
- u8 tx_hang_workaround:1;
-
- struct net_device *dev;
- struct platform_device *pdev;
- spinlock_t lock;
- struct napi_struct napi;
- u32 msg_enable;
-
- /*
- * From this point onwards we're not looking at per-packet fields.
- */
- void __iomem *mac_base;
- void __iomem *mii_base;
-
- struct ag71xx_desc *stop_desc;
- dma_addr_t stop_desc_dma;
-
- struct phy_device *phy_dev;
- void *phy_priv;
- int phy_if_mode;
-
- unsigned int link;
- unsigned int speed;
- int duplex;
-
- struct delayed_work restart_work;
- struct timer_list oom_timer;
-
- struct reset_control *mac_reset;
- struct reset_control *mdio_reset;
-
- u32 fifodata[3];
- u32 plldata[3];
- u32 pllreg[3];
- struct regmap *pllregmap;
-
-#ifdef CONFIG_AG71XX_DEBUG_FS
- struct ag71xx_debug debug;
-#endif
-};
-
-struct ag71xx_mdio {
- struct reset_control *mdio_reset;
- struct mii_bus *mii_bus;
- struct regmap *mii_regmap;
-};
-
-extern struct ethtool_ops ag71xx_ethtool_ops;
-void ag71xx_link_adjust(struct ag71xx *ag);
-
-int ag71xx_phy_connect(struct ag71xx *ag);
-void ag71xx_phy_disconnect(struct ag71xx *ag);
-
-static inline int ag71xx_desc_empty(struct ag71xx_desc *desc)
-{
- return (desc->ctrl & DESC_EMPTY) != 0;
-}
-
-static inline struct ag71xx_desc *
-ag71xx_ring_desc(struct ag71xx_ring *ring, int idx)
-{
- return (struct ag71xx_desc *) &ring->descs_cpu[idx * AG71XX_DESC_SIZE];
-}
-
-static inline int
-ag71xx_ring_size_order(int size)
-{
- return fls(size - 1);
-}
-
-/* Register offsets */
-#define AG71XX_REG_MAC_CFG1 0x0000
-#define AG71XX_REG_MAC_CFG2 0x0004
-#define AG71XX_REG_MAC_IPG 0x0008
-#define AG71XX_REG_MAC_HDX 0x000c
-#define AG71XX_REG_MAC_MFL 0x0010
-#define AG71XX_REG_MII_CFG 0x0020
-#define AG71XX_REG_MII_CMD 0x0024
-#define AG71XX_REG_MII_ADDR 0x0028
-#define AG71XX_REG_MII_CTRL 0x002c
-#define AG71XX_REG_MII_STATUS 0x0030
-#define AG71XX_REG_MII_IND 0x0034
-#define AG71XX_REG_MAC_IFCTL 0x0038
-#define AG71XX_REG_MAC_ADDR1 0x0040
-#define AG71XX_REG_MAC_ADDR2 0x0044
-#define AG71XX_REG_FIFO_CFG0 0x0048
-#define AG71XX_REG_FIFO_CFG1 0x004c
-#define AG71XX_REG_FIFO_CFG2 0x0050
-#define AG71XX_REG_FIFO_CFG3 0x0054
-#define AG71XX_REG_FIFO_CFG4 0x0058
-#define AG71XX_REG_FIFO_CFG5 0x005c
-#define AG71XX_REG_FIFO_RAM0 0x0060
-#define AG71XX_REG_FIFO_RAM1 0x0064
-#define AG71XX_REG_FIFO_RAM2 0x0068
-#define AG71XX_REG_FIFO_RAM3 0x006c
-#define AG71XX_REG_FIFO_RAM4 0x0070
-#define AG71XX_REG_FIFO_RAM5 0x0074
-#define AG71XX_REG_FIFO_RAM6 0x0078
-#define AG71XX_REG_FIFO_RAM7 0x007c
-
-#define AG71XX_REG_TX_CTRL 0x0180
-#define AG71XX_REG_TX_DESC 0x0184
-#define AG71XX_REG_TX_STATUS 0x0188
-#define AG71XX_REG_RX_CTRL 0x018c
-#define AG71XX_REG_RX_DESC 0x0190
-#define AG71XX_REG_RX_STATUS 0x0194
-#define AG71XX_REG_INT_ENABLE 0x0198
-#define AG71XX_REG_INT_STATUS 0x019c
-
-#define AG71XX_REG_FIFO_DEPTH 0x01a8
-#define AG71XX_REG_RX_SM 0x01b0
-#define AG71XX_REG_TX_SM 0x01b4
-
-#define MAC_CFG1_TXE BIT(0) /* Tx Enable */
-#define MAC_CFG1_STX BIT(1) /* Synchronize Tx Enable */
-#define MAC_CFG1_RXE BIT(2) /* Rx Enable */
-#define MAC_CFG1_SRX BIT(3) /* Synchronize Rx Enable */
-#define MAC_CFG1_TFC BIT(4) /* Tx Flow Control Enable */
-#define MAC_CFG1_RFC BIT(5) /* Rx Flow Control Enable */
-#define MAC_CFG1_LB BIT(8) /* Loopback mode */
-#define MAC_CFG1_SR BIT(31) /* Soft Reset */
-
-#define MAC_CFG2_FDX BIT(0)
-#define MAC_CFG2_CRC_EN BIT(1)
-#define MAC_CFG2_PAD_CRC_EN BIT(2)
-#define MAC_CFG2_LEN_CHECK BIT(4)
-#define MAC_CFG2_HUGE_FRAME_EN BIT(5)
-#define MAC_CFG2_IF_1000 BIT(9)
-#define MAC_CFG2_IF_10_100 BIT(8)
-
-#define FIFO_CFG0_WTM BIT(0) /* Watermark Module */
-#define FIFO_CFG0_RXS BIT(1) /* Rx System Module */
-#define FIFO_CFG0_RXF BIT(2) /* Rx Fabric Module */
-#define FIFO_CFG0_TXS BIT(3) /* Tx System Module */
-#define FIFO_CFG0_TXF BIT(4) /* Tx Fabric Module */
-#define FIFO_CFG0_ALL (FIFO_CFG0_WTM | FIFO_CFG0_RXS | FIFO_CFG0_RXF \
- | FIFO_CFG0_TXS | FIFO_CFG0_TXF)
-
-#define FIFO_CFG0_ENABLE_SHIFT 8
-
-#define FIFO_CFG4_DE BIT(0) /* Drop Event */
-#define FIFO_CFG4_DV BIT(1) /* RX_DV Event */
-#define FIFO_CFG4_FC BIT(2) /* False Carrier */
-#define FIFO_CFG4_CE BIT(3) /* Code Error */
-#define FIFO_CFG4_CR BIT(4) /* CRC error */
-#define FIFO_CFG4_LM BIT(5) /* Length Mismatch */
-#define FIFO_CFG4_LO BIT(6) /* Length out of range */
-#define FIFO_CFG4_OK BIT(7) /* Packet is OK */
-#define FIFO_CFG4_MC BIT(8) /* Multicast Packet */
-#define FIFO_CFG4_BC BIT(9) /* Broadcast Packet */
-#define FIFO_CFG4_DR BIT(10) /* Dribble */
-#define FIFO_CFG4_LE BIT(11) /* Long Event */
-#define FIFO_CFG4_CF BIT(12) /* Control Frame */
-#define FIFO_CFG4_PF BIT(13) /* Pause Frame */
-#define FIFO_CFG4_UO BIT(14) /* Unsupported Opcode */
-#define FIFO_CFG4_VT BIT(15) /* VLAN tag detected */
-#define FIFO_CFG4_FT BIT(16) /* Frame Truncated */
-#define FIFO_CFG4_UC BIT(17) /* Unicast Packet */
-
-#define FIFO_CFG5_DE BIT(0) /* Drop Event */
-#define FIFO_CFG5_DV BIT(1) /* RX_DV Event */
-#define FIFO_CFG5_FC BIT(2) /* False Carrier */
-#define FIFO_CFG5_CE BIT(3) /* Code Error */
-#define FIFO_CFG5_LM BIT(4) /* Length Mismatch */
-#define FIFO_CFG5_LO BIT(5) /* Length Out of Range */
-#define FIFO_CFG5_OK BIT(6) /* Packet is OK */
-#define FIFO_CFG5_MC BIT(7) /* Multicast Packet */
-#define FIFO_CFG5_BC BIT(8) /* Broadcast Packet */
-#define FIFO_CFG5_DR BIT(9) /* Dribble */
-#define FIFO_CFG5_CF BIT(10) /* Control Frame */
-#define FIFO_CFG5_PF BIT(11) /* Pause Frame */
-#define FIFO_CFG5_UO BIT(12) /* Unsupported Opcode */
-#define FIFO_CFG5_VT BIT(13) /* VLAN tag detected */
-#define FIFO_CFG5_LE BIT(14) /* Long Event */
-#define FIFO_CFG5_FT BIT(15) /* Frame Truncated */
-#define FIFO_CFG5_16 BIT(16) /* unknown */
-#define FIFO_CFG5_17 BIT(17) /* unknown */
-#define FIFO_CFG5_SF BIT(18) /* Short Frame */
-#define FIFO_CFG5_BM BIT(19) /* Byte Mode */
-
-#define AG71XX_INT_TX_PS BIT(0)
-#define AG71XX_INT_TX_UR BIT(1)
-#define AG71XX_INT_TX_BE BIT(3)
-#define AG71XX_INT_RX_PR BIT(4)
-#define AG71XX_INT_RX_OF BIT(6)
-#define AG71XX_INT_RX_BE BIT(7)
-
-#define MAC_IFCTL_SPEED BIT(16)
-
-#define MII_CFG_CLK_DIV_4 0
-#define MII_CFG_CLK_DIV_6 2
-#define MII_CFG_CLK_DIV_8 3
-#define MII_CFG_CLK_DIV_10 4
-#define MII_CFG_CLK_DIV_14 5
-#define MII_CFG_CLK_DIV_20 6
-#define MII_CFG_CLK_DIV_28 7
-#define MII_CFG_CLK_DIV_34 8
-#define MII_CFG_CLK_DIV_42 9
-#define MII_CFG_CLK_DIV_50 10
-#define MII_CFG_CLK_DIV_58 11
-#define MII_CFG_CLK_DIV_66 12
-#define MII_CFG_CLK_DIV_74 13
-#define MII_CFG_CLK_DIV_82 14
-#define MII_CFG_CLK_DIV_98 15
-#define MII_CFG_RESET BIT(31)
-
-#define MII_CMD_WRITE 0x0
-#define MII_CMD_READ 0x1
-#define MII_ADDR_SHIFT 8
-#define MII_IND_BUSY BIT(0)
-#define MII_IND_INVALID BIT(2)
-
-#define TX_CTRL_TXE BIT(0) /* Tx Enable */
-
-#define TX_STATUS_PS BIT(0) /* Packet Sent */
-#define TX_STATUS_UR BIT(1) /* Tx Underrun */
-#define TX_STATUS_BE BIT(3) /* Bus Error */
-
-#define RX_CTRL_RXE BIT(0) /* Rx Enable */
-
-#define RX_STATUS_PR BIT(0) /* Packet Received */
-#define RX_STATUS_OF BIT(2) /* Rx Overflow */
-#define RX_STATUS_BE BIT(3) /* Bus Error */
-
-static inline void ag71xx_wr(struct ag71xx *ag, unsigned reg, u32 value)
-{
- __raw_writel(value, ag->mac_base + reg);
- /* flush write */
- (void) __raw_readl(ag->mac_base + reg);
-}
-
-static inline u32 ag71xx_rr(struct ag71xx *ag, unsigned reg)
-{
- return __raw_readl(ag->mac_base + reg);
-}
-
-static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask)
-{
- void __iomem *r;
-
- r = ag->mac_base + reg;
- __raw_writel(__raw_readl(r) | mask, r);
- /* flush write */
- (void) __raw_readl(r);
-}
-
-static inline void ag71xx_cb(struct ag71xx *ag, unsigned reg, u32 mask)
-{
- void __iomem *r;
-
- r = ag->mac_base + reg;
- __raw_writel(__raw_readl(r) & ~mask, r);
- /* flush write */
- (void) __raw_readl(r);
-}
-
-static inline void ag71xx_int_enable(struct ag71xx *ag, u32 ints)
-{
- ag71xx_sb(ag, AG71XX_REG_INT_ENABLE, ints);
-}
-
-static inline void ag71xx_int_disable(struct ag71xx *ag, u32 ints)
-{
- ag71xx_cb(ag, AG71XX_REG_INT_ENABLE, ints);
-}
-
-#ifdef CONFIG_AG71XX_DEBUG_FS
-int ag71xx_debugfs_root_init(void);
-void ag71xx_debugfs_root_exit(void);
-int ag71xx_debugfs_init(struct ag71xx *ag);
-void ag71xx_debugfs_exit(struct ag71xx *ag);
-void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status);
-void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx);
-#else
-static inline int ag71xx_debugfs_root_init(void) { return 0; }
-static inline void ag71xx_debugfs_root_exit(void) {}
-static inline int ag71xx_debugfs_init(struct ag71xx *ag) { return 0; }
-static inline void ag71xx_debugfs_exit(struct ag71xx *ag) {}
-static inline void ag71xx_debugfs_update_int_stats(struct ag71xx *ag,
- u32 status) {}
-static inline void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag,
- int rx, int tx) {}
-#endif /* CONFIG_AG71XX_DEBUG_FS */
-
-int ag71xx_ar7240_init(struct ag71xx *ag, struct device_node *np);
-void ag71xx_ar7240_cleanup(struct ag71xx *ag);
-
-int ag71xx_setup_gmac(struct device_node *np);
-
-int ar7240sw_phy_read(struct mii_bus *mii, int addr, int reg);
-int ar7240sw_phy_write(struct mii_bus *mii, int addr, int reg, u16 val);
-
-#endif /* _AG71XX_H */
+++ /dev/null
-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
- *
- * Based on Atheros' AG7100 driver
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include <linux/debugfs.h>
-
-#include "ag71xx.h"
-
-static struct dentry *ag71xx_debugfs_root;
-
-static int ag71xx_debugfs_generic_open(struct inode *inode, struct file *file)
-{
- file->private_data = inode->i_private;
- return 0;
-}
-
-void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status)
-{
- if (status)
- ag->debug.int_stats.total++;
- if (status & AG71XX_INT_TX_PS)
- ag->debug.int_stats.tx_ps++;
- if (status & AG71XX_INT_TX_UR)
- ag->debug.int_stats.tx_ur++;
- if (status & AG71XX_INT_TX_BE)
- ag->debug.int_stats.tx_be++;
- if (status & AG71XX_INT_RX_PR)
- ag->debug.int_stats.rx_pr++;
- if (status & AG71XX_INT_RX_OF)
- ag->debug.int_stats.rx_of++;
- if (status & AG71XX_INT_RX_BE)
- ag->debug.int_stats.rx_be++;
-}
-
-static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
-#define PR_INT_STAT(_label, _field) \
- len += snprintf(buf + len, sizeof(buf) - len, \
- "%20s: %10lu\n", _label, ag->debug.int_stats._field);
-
- struct ag71xx *ag = file->private_data;
- char buf[256];
- unsigned int len = 0;
-
- PR_INT_STAT("TX Packet Sent", tx_ps);
- PR_INT_STAT("TX Underrun", tx_ur);
- PR_INT_STAT("TX Bus Error", tx_be);
- PR_INT_STAT("RX Packet Received", rx_pr);
- PR_INT_STAT("RX Overflow", rx_of);
- PR_INT_STAT("RX Bus Error", rx_be);
- len += snprintf(buf + len, sizeof(buf) - len, "\n");
- PR_INT_STAT("Total", total);
-
- return simple_read_from_buffer(user_buf, count, ppos, buf, len);
-#undef PR_INT_STAT
-}
-
-static const struct file_operations ag71xx_fops_int_stats = {
- .open = ag71xx_debugfs_generic_open,
- .read = read_file_int_stats,
- .owner = THIS_MODULE
-};
-
-void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx)
-{
- struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
-
- if (rx) {
- stats->rx_count++;
- stats->rx_packets += rx;
- if (rx <= AG71XX_NAPI_WEIGHT)
- stats->rx[rx]++;
- if (rx > stats->rx_packets_max)
- stats->rx_packets_max = rx;
- }
-
- if (tx) {
- stats->tx_count++;
- stats->tx_packets += tx;
- if (tx <= AG71XX_NAPI_WEIGHT)
- stats->tx[tx]++;
- if (tx > stats->tx_packets_max)
- stats->tx_packets_max = tx;
- }
-}
-
-static ssize_t read_file_napi_stats(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct ag71xx *ag = file->private_data;
- struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
- char *buf;
- unsigned int buflen;
- unsigned int len = 0;
- unsigned long rx_avg = 0;
- unsigned long tx_avg = 0;
- int ret;
- int i;
-
- buflen = 2048;
- buf = kmalloc(buflen, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- if (stats->rx_count)
- rx_avg = stats->rx_packets / stats->rx_count;
-
- if (stats->tx_count)
- tx_avg = stats->tx_packets / stats->tx_count;
-
- len += snprintf(buf + len, buflen - len, "%3s %10s %10s\n",
- "len", "rx", "tx");
-
- for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++)
- len += snprintf(buf + len, buflen - len,
- "%3d: %10lu %10lu\n",
- i, stats->rx[i], stats->tx[i]);
-
- len += snprintf(buf + len, buflen - len, "\n");
-
- len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
- "sum", stats->rx_count, stats->tx_count);
- len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
- "avg", rx_avg, tx_avg);
- len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
- "max", stats->rx_packets_max, stats->tx_packets_max);
- len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
- "pkt", stats->rx_packets, stats->tx_packets);
-
- ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
- kfree(buf);
-
- return ret;
-}
-
-static const struct file_operations ag71xx_fops_napi_stats = {
- .open = ag71xx_debugfs_generic_open,
- .read = read_file_napi_stats,
- .owner = THIS_MODULE
-};
-
-#define DESC_PRINT_LEN 64
-
-static ssize_t read_file_ring(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos,
- struct ag71xx *ag,
- struct ag71xx_ring *ring,
- unsigned desc_reg)
-{
- int ring_size = BIT(ring->order);
- int ring_mask = ring_size - 1;
- char *buf;
- unsigned int buflen;
- unsigned int len = 0;
- unsigned long flags;
- ssize_t ret;
- int curr;
- int dirty;
- u32 desc_hw;
- int i;
-
- buflen = (ring_size * DESC_PRINT_LEN);
- buf = kmalloc(buflen, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
-
- len += snprintf(buf + len, buflen - len,
- "Idx ... %-8s %-8s %-8s %-8s .\n",
- "desc", "next", "data", "ctrl");
-
- spin_lock_irqsave(&ag->lock, flags);
-
- curr = (ring->curr & ring_mask);
- dirty = (ring->dirty & ring_mask);
- desc_hw = ag71xx_rr(ag, desc_reg);
- for (i = 0; i < ring_size; i++) {
- struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
- u32 desc_dma = ((u32) ring->descs_dma) + i * AG71XX_DESC_SIZE;
-
- len += snprintf(buf + len, buflen - len,
- "%3d %c%c%c %08x %08x %08x %08x %c\n",
- i,
- (i == curr) ? 'C' : ' ',
- (i == dirty) ? 'D' : ' ',
- (desc_hw == desc_dma) ? 'H' : ' ',
- desc_dma,
- desc->next,
- desc->data,
- desc->ctrl,
- (desc->ctrl & DESC_EMPTY) ? 'E' : '*');
- }
-
- spin_unlock_irqrestore(&ag->lock, flags);
-
- ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
- kfree(buf);
-
- return ret;
-}
-
-static ssize_t read_file_tx_ring(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct ag71xx *ag = file->private_data;
-
- return read_file_ring(file, user_buf, count, ppos, ag, &ag->tx_ring,
- AG71XX_REG_TX_DESC);
-}
-
-static const struct file_operations ag71xx_fops_tx_ring = {
- .open = ag71xx_debugfs_generic_open,
- .read = read_file_tx_ring,
- .owner = THIS_MODULE
-};
-
-static ssize_t read_file_rx_ring(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct ag71xx *ag = file->private_data;
-
- return read_file_ring(file, user_buf, count, ppos, ag, &ag->rx_ring,
- AG71XX_REG_RX_DESC);
-}
-
-static const struct file_operations ag71xx_fops_rx_ring = {
- .open = ag71xx_debugfs_generic_open,
- .read = read_file_rx_ring,
- .owner = THIS_MODULE
-};
-
-void ag71xx_debugfs_exit(struct ag71xx *ag)
-{
- debugfs_remove_recursive(ag->debug.debugfs_dir);
-}
-
-int ag71xx_debugfs_init(struct ag71xx *ag)
-{
- struct device *dev = &ag->pdev->dev;
-
- ag->debug.debugfs_dir = debugfs_create_dir(dev_name(dev),
- ag71xx_debugfs_root);
- if (!ag->debug.debugfs_dir) {
- dev_err(dev, "unable to create debugfs directory\n");
- return -ENOENT;
- }
-
- debugfs_create_file("int_stats", S_IRUGO, ag->debug.debugfs_dir,
- ag, &ag71xx_fops_int_stats);
- debugfs_create_file("napi_stats", S_IRUGO, ag->debug.debugfs_dir,
- ag, &ag71xx_fops_napi_stats);
- debugfs_create_file("tx_ring", S_IRUGO, ag->debug.debugfs_dir,
- ag, &ag71xx_fops_tx_ring);
- debugfs_create_file("rx_ring", S_IRUGO, ag->debug.debugfs_dir,
- ag, &ag71xx_fops_rx_ring);
-
- return 0;
-}
-
-int ag71xx_debugfs_root_init(void)
-{
- if (ag71xx_debugfs_root)
- return -EBUSY;
-
- ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
- if (!ag71xx_debugfs_root)
- return -ENOENT;
-
- return 0;
-}
-
-void ag71xx_debugfs_root_exit(void)
-{
- debugfs_remove(ag71xx_debugfs_root);
- ag71xx_debugfs_root = NULL;
-}
+++ /dev/null
-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
- *
- * Based on Atheros' AG7100 driver
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include "ag71xx.h"
-
-static u32 ag71xx_ethtool_get_msglevel(struct net_device *dev)
-{
- struct ag71xx *ag = netdev_priv(dev);
-
- return ag->msg_enable;
-}
-
-static void ag71xx_ethtool_set_msglevel(struct net_device *dev, u32 msg_level)
-{
- struct ag71xx *ag = netdev_priv(dev);
-
- ag->msg_enable = msg_level;
-}
-
-static void ag71xx_ethtool_get_ringparam(struct net_device *dev,
- struct ethtool_ringparam *er)
-{
- struct ag71xx *ag = netdev_priv(dev);
-
- er->tx_max_pending = AG71XX_TX_RING_SIZE_MAX;
- er->rx_max_pending = AG71XX_RX_RING_SIZE_MAX;
- er->rx_mini_max_pending = 0;
- er->rx_jumbo_max_pending = 0;
-
- er->tx_pending = BIT(ag->tx_ring.order);
- er->rx_pending = BIT(ag->rx_ring.order);
- er->rx_mini_pending = 0;
- er->rx_jumbo_pending = 0;
-
- if (ag->tx_ring.desc_split)
- er->tx_pending /= AG71XX_TX_RING_DS_PER_PKT;
-}
-
-static int ag71xx_ethtool_set_ringparam(struct net_device *dev,
- struct ethtool_ringparam *er)
-{
- struct ag71xx *ag = netdev_priv(dev);
- unsigned tx_size;
- unsigned rx_size;
- int err = 0;
-
- if (er->rx_mini_pending != 0||
- er->rx_jumbo_pending != 0 ||
- er->rx_pending == 0 ||
- er->tx_pending == 0)
- return -EINVAL;
-
- tx_size = er->tx_pending < AG71XX_TX_RING_SIZE_MAX ?
- er->tx_pending : AG71XX_TX_RING_SIZE_MAX;
-
- rx_size = er->rx_pending < AG71XX_RX_RING_SIZE_MAX ?
- er->rx_pending : AG71XX_RX_RING_SIZE_MAX;
-
- if (netif_running(dev)) {
- err = dev->netdev_ops->ndo_stop(dev);
- if (err)
- return err;
- }
-
- if (ag->tx_ring.desc_split)
- tx_size *= AG71XX_TX_RING_DS_PER_PKT;
-
- ag->tx_ring.order = ag71xx_ring_size_order(tx_size);
- ag->rx_ring.order = ag71xx_ring_size_order(rx_size);
-
- if (netif_running(dev))
- err = dev->netdev_ops->ndo_open(dev);
-
- return err;
-}
-
-static int ag71xx_ethtool_nway_reset(struct net_device *dev)
-{
- struct ag71xx *ag = netdev_priv(dev);
- struct phy_device *phydev = ag->phy_dev;
-
- if (!phydev)
- return -ENODEV;
-
- return genphy_restart_aneg(phydev);
-}
-
-struct ethtool_ops ag71xx_ethtool_ops = {
- .get_msglevel = ag71xx_ethtool_get_msglevel,
- .set_msglevel = ag71xx_ethtool_set_msglevel,
- .get_ringparam = ag71xx_ethtool_get_ringparam,
- .set_ringparam = ag71xx_ethtool_set_ringparam,
- .get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = phy_ethtool_set_link_ksettings,
- .get_link = ethtool_op_get_link,
- .get_ts_info = ethtool_op_get_ts_info,
- .nway_reset = ag71xx_ethtool_nway_reset,
-};
+++ /dev/null
-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include <linux/sizes.h>
-#include <linux/of_address.h>
-#include "ag71xx.h"
-
-static void ag71xx_of_set(struct device_node *np, const char *prop,
- u32 *reg, u32 shift, u32 mask)
-{
- u32 val;
-
- if (of_property_read_u32(np, prop, &val))
- return;
-
- *reg &= ~(mask << shift);
- *reg |= ((val & mask) << shift);
-}
-
-static void ag71xx_of_bit(struct device_node *np, const char *prop,
- u32 *reg, u32 mask)
-{
- u32 val;
-
- if (of_property_read_u32(np, prop, &val))
- return;
-
- if (val)
- *reg |= mask;
- else
- *reg &= ~mask;
-}
-
-static void ag71xx_setup_gmac_933x(struct device_node *np, void __iomem *base)
-{
- u32 val = __raw_readl(base + AR933X_GMAC_REG_ETH_CFG);
-
- ag71xx_of_bit(np, "switch-phy-swap", &val, AR933X_ETH_CFG_SW_PHY_SWAP);
- ag71xx_of_bit(np, "switch-phy-addr-swap", &val,
- AR933X_ETH_CFG_SW_PHY_ADDR_SWAP);
-
- __raw_writel(val, base + AR933X_GMAC_REG_ETH_CFG);
-}
-
-static void ag71xx_setup_gmac_934x(struct device_node *np, void __iomem *base)
-{
- u32 val = __raw_readl(base + AR934X_GMAC_REG_ETH_CFG);
-
- ag71xx_of_bit(np, "rgmii-gmac0", &val, AR934X_ETH_CFG_RGMII_GMAC0);
- ag71xx_of_bit(np, "mii-gmac0", &val, AR934X_ETH_CFG_MII_GMAC0);
- ag71xx_of_bit(np, "mii-gmac0-slave", &val, AR934X_ETH_CFG_MII_GMAC0_SLAVE);
- ag71xx_of_bit(np, "gmii-gmac0", &val, AR934X_ETH_CFG_GMII_GMAC0);
- ag71xx_of_bit(np, "switch-phy-swap", &val, AR934X_ETH_CFG_SW_PHY_SWAP);
- ag71xx_of_bit(np, "switch-only-mode", &val,
- AR934X_ETH_CFG_SW_ONLY_MODE);
- ag71xx_of_set(np, "rxdv-delay", &val,
- AR934X_ETH_CFG_RDV_DELAY_SHIFT, 0x3);
- ag71xx_of_set(np, "rxd-delay", &val,
- AR934X_ETH_CFG_RXD_DELAY_SHIFT, 0x3);
- ag71xx_of_set(np, "txd-delay", &val,
- AR934X_ETH_CFG_TXD_DELAY_SHIFT, 0x3);
- ag71xx_of_set(np, "txen-delay", &val,
- AR934X_ETH_CFG_TXE_DELAY_SHIFT, 0x3);
-
- __raw_writel(val, base + AR934X_GMAC_REG_ETH_CFG);
-}
-
-static void ag71xx_setup_gmac_955x(struct device_node *np, void __iomem *base)
-{
- u32 val = __raw_readl(base + QCA955X_GMAC_REG_ETH_CFG);
-
- ag71xx_of_bit(np, "rgmii-enabled", &val, QCA955X_ETH_CFG_RGMII_EN);
- ag71xx_of_bit(np, "ge0-sgmii", &val, QCA955X_ETH_CFG_GE0_SGMII);
- ag71xx_of_set(np, "txen-delay", &val, QCA955X_ETH_CFG_TXE_DELAY_SHIFT, 0x3);
- ag71xx_of_set(np, "txd-delay", &val, QCA955X_ETH_CFG_TXD_DELAY_SHIFT, 0x3);
- ag71xx_of_set(np, "rxdv-delay", &val, QCA955X_ETH_CFG_RDV_DELAY_SHIFT, 0x3);
- ag71xx_of_set(np, "rxd-delay", &val, QCA955X_ETH_CFG_RXD_DELAY_SHIFT, 0x3);
-
- __raw_writel(val, base + QCA955X_GMAC_REG_ETH_CFG);
-}
-
-static void ag71xx_setup_gmac_956x(struct device_node *np, void __iomem *base)
-{
- u32 val = __raw_readl(base + QCA956X_GMAC_REG_ETH_CFG);
-
- ag71xx_of_bit(np, "switch-phy-swap", &val, QCA956X_ETH_CFG_SW_PHY_SWAP);
- ag71xx_of_bit(np, "switch-phy-addr-swap", &val,
- QCA956X_ETH_CFG_SW_PHY_ADDR_SWAP);
-
- __raw_writel(val, base + QCA956X_GMAC_REG_ETH_CFG);
-}
-
-int ag71xx_setup_gmac(struct device_node *np)
-{
- struct device_node *np_dev;
- void __iomem *base;
- int err = 0;
-
- np = of_get_child_by_name(np, "gmac-config");
- if (!np)
- return 0;
-
- np_dev = of_parse_phandle(np, "device", 0);
- if (!np_dev)
- goto out;
-
- base = of_iomap(np_dev, 0);
- if (!base) {
- pr_err("%pOF: can't map GMAC registers\n", np_dev);
- err = -ENOMEM;
- goto err_iomap;
- }
-
- if (of_device_is_compatible(np_dev, "qca,ar9330-gmac"))
- ag71xx_setup_gmac_933x(np, base);
- else if (of_device_is_compatible(np_dev, "qca,ar9340-gmac"))
- ag71xx_setup_gmac_934x(np, base);
- else if (of_device_is_compatible(np_dev, "qca,qca9550-gmac"))
- ag71xx_setup_gmac_955x(np, base);
- else if (of_device_is_compatible(np_dev, "qca,qca9560-gmac"))
- ag71xx_setup_gmac_956x(np, base);
-
- iounmap(base);
-
-err_iomap:
- of_node_put(np_dev);
-out:
- of_node_put(np);
- return err;
-}
+++ /dev/null
-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
- *
- * Based on Atheros' AG7100 driver
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include <linux/sizes.h>
-#include <linux/of_net.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-#include "ag71xx.h"
-
-#define AG71XX_DEFAULT_MSG_ENABLE \
- (NETIF_MSG_DRV \
- | NETIF_MSG_PROBE \
- | NETIF_MSG_LINK \
- | NETIF_MSG_TIMER \
- | NETIF_MSG_IFDOWN \
- | NETIF_MSG_IFUP \
- | NETIF_MSG_RX_ERR \
- | NETIF_MSG_TX_ERR)
-
-static int ag71xx_msg_level = -1;
-
-module_param_named(msg_level, ag71xx_msg_level, int, 0);
-MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
-
-#define ETH_SWITCH_HEADER_LEN 2
-
-static int ag71xx_tx_packets(struct ag71xx *ag, bool flush);
-
-static inline unsigned int ag71xx_max_frame_len(unsigned int mtu)
-{
- return ETH_SWITCH_HEADER_LEN + ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN;
-}
-
-static void ag71xx_dump_dma_regs(struct ag71xx *ag)
-{
- DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_TX_CTRL),
- ag71xx_rr(ag, AG71XX_REG_TX_DESC),
- ag71xx_rr(ag, AG71XX_REG_TX_STATUS));
-
- DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_RX_CTRL),
- ag71xx_rr(ag, AG71XX_REG_RX_DESC),
- ag71xx_rr(ag, AG71XX_REG_RX_STATUS));
-}
-
-static void ag71xx_dump_regs(struct ag71xx *ag)
-{
- DBG("%s: mac_cfg1=%08x, mac_cfg2=%08x, ipg=%08x, hdx=%08x, mfl=%08x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_MAC_CFG1),
- ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
- ag71xx_rr(ag, AG71XX_REG_MAC_IPG),
- ag71xx_rr(ag, AG71XX_REG_MAC_HDX),
- ag71xx_rr(ag, AG71XX_REG_MAC_MFL));
- DBG("%s: mac_ifctl=%08x, mac_addr1=%08x, mac_addr2=%08x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
- ag71xx_rr(ag, AG71XX_REG_MAC_ADDR1),
- ag71xx_rr(ag, AG71XX_REG_MAC_ADDR2));
- DBG("%s: fifo_cfg0=%08x, fifo_cfg1=%08x, fifo_cfg2=%08x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
- DBG("%s: fifo_cfg3=%08x, fifo_cfg4=%08x, fifo_cfg5=%08x\n",
- ag->dev->name,
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
- ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
-}
-
-static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr)
-{
- DBG("%s: %s intr=%08x %s%s%s%s%s%s\n",
- ag->dev->name, label, intr,
- (intr & AG71XX_INT_TX_PS) ? "TXPS " : "",
- (intr & AG71XX_INT_TX_UR) ? "TXUR " : "",
- (intr & AG71XX_INT_TX_BE) ? "TXBE " : "",
- (intr & AG71XX_INT_RX_PR) ? "RXPR " : "",
- (intr & AG71XX_INT_RX_OF) ? "RXOF " : "",
- (intr & AG71XX_INT_RX_BE) ? "RXBE " : "");
-}
-
-static void ag71xx_ring_tx_clean(struct ag71xx *ag)
-{
- struct ag71xx_ring *ring = &ag->tx_ring;
- struct net_device *dev = ag->dev;
- int ring_mask = BIT(ring->order) - 1;
- u32 bytes_compl = 0, pkts_compl = 0;
-
- while (ring->curr != ring->dirty) {
- struct ag71xx_desc *desc;
- u32 i = ring->dirty & ring_mask;
-
- desc = ag71xx_ring_desc(ring, i);
- if (!ag71xx_desc_empty(desc)) {
- desc->ctrl = 0;
- dev->stats.tx_errors++;
- }
-
- if (ring->buf[i].skb) {
- bytes_compl += ring->buf[i].len;
- pkts_compl++;
- dev_kfree_skb_any(ring->buf[i].skb);
- }
- ring->buf[i].skb = NULL;
- ring->dirty++;
- }
-
- /* flush descriptors */
- wmb();
-
- netdev_completed_queue(dev, pkts_compl, bytes_compl);
-}
-
-static void ag71xx_ring_tx_init(struct ag71xx *ag)
-{
- struct ag71xx_ring *ring = &ag->tx_ring;
- int ring_size = BIT(ring->order);
- int ring_mask = BIT(ring->order) - 1;
- int i;
-
- for (i = 0; i < ring_size; i++) {
- struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
-
- desc->next = (u32) (ring->descs_dma +
- AG71XX_DESC_SIZE * ((i + 1) & ring_mask));
-
- desc->ctrl = DESC_EMPTY;
- ring->buf[i].skb = NULL;
- }
-
- /* flush descriptors */
- wmb();
-
- ring->curr = 0;
- ring->dirty = 0;
- netdev_reset_queue(ag->dev);
-}
-
-static void ag71xx_ring_rx_clean(struct ag71xx *ag)
-{
- struct ag71xx_ring *ring = &ag->rx_ring;
- int ring_size = BIT(ring->order);
- int i;
-
- if (!ring->buf)
- return;
-
- for (i = 0; i < ring_size; i++)
- if (ring->buf[i].rx_buf) {
- dma_unmap_single(&ag->pdev->dev, ring->buf[i].dma_addr,
- ag->rx_buf_size, DMA_FROM_DEVICE);
- skb_free_frag(ring->buf[i].rx_buf);
- }
-}
-
-static int ag71xx_buffer_size(struct ag71xx *ag)
-{
- return ag->rx_buf_size +
- SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
-}
-
-static bool ag71xx_fill_rx_buf(struct ag71xx *ag, struct ag71xx_buf *buf,
- int offset,
- void *(*alloc)(unsigned int size))
-{
- struct ag71xx_ring *ring = &ag->rx_ring;
- struct ag71xx_desc *desc = ag71xx_ring_desc(ring, buf - &ring->buf[0]);
- void *data;
-
- data = alloc(ag71xx_buffer_size(ag));
- if (!data)
- return false;
-
- buf->rx_buf = data;
- buf->dma_addr = dma_map_single(&ag->pdev->dev, data, ag->rx_buf_size,
- DMA_FROM_DEVICE);
- desc->data = (u32) buf->dma_addr + offset;
- return true;
-}
-
-static int ag71xx_ring_rx_init(struct ag71xx *ag)
-{
- struct ag71xx_ring *ring = &ag->rx_ring;
- int ring_size = BIT(ring->order);
- int ring_mask = BIT(ring->order) - 1;
- unsigned int i;
- int ret;
-
- ret = 0;
- for (i = 0; i < ring_size; i++) {
- struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
-
- desc->next = (u32) (ring->descs_dma +
- AG71XX_DESC_SIZE * ((i + 1) & ring_mask));
-
- DBG("ag71xx: RX desc at %p, next is %08x\n",
- desc, desc->next);
- }
-
- for (i = 0; i < ring_size; i++) {
- struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
-
- if (!ag71xx_fill_rx_buf(ag, &ring->buf[i], ag->rx_buf_offset,
- netdev_alloc_frag)) {
- ret = -ENOMEM;
- break;
- }
-
- desc->ctrl = DESC_EMPTY;
- }
-
- /* flush descriptors */
- wmb();
-
- ring->curr = 0;
- ring->dirty = 0;
-
- return ret;
-}
-
-static int ag71xx_ring_rx_refill(struct ag71xx *ag)
-{
- struct ag71xx_ring *ring = &ag->rx_ring;
- int ring_mask = BIT(ring->order) - 1;
- unsigned int count;
- int offset = ag->rx_buf_offset;
-
- count = 0;
- for (; ring->curr - ring->dirty > 0; ring->dirty++) {
- struct ag71xx_desc *desc;
- unsigned int i;
-
- i = ring->dirty & ring_mask;
- desc = ag71xx_ring_desc(ring, i);
-
- if (!ring->buf[i].rx_buf &&
- !ag71xx_fill_rx_buf(ag, &ring->buf[i], offset,
- napi_alloc_frag))
- break;
-
- desc->ctrl = DESC_EMPTY;
- count++;
- }
-
- /* flush descriptors */
- wmb();
-
- DBG("%s: %u rx descriptors refilled\n", ag->dev->name, count);
-
- return count;
-}
-
-static int ag71xx_rings_init(struct ag71xx *ag)
-{
- struct ag71xx_ring *tx = &ag->tx_ring;
- struct ag71xx_ring *rx = &ag->rx_ring;
- int ring_size = BIT(tx->order) + BIT(rx->order);
- int tx_size = BIT(tx->order);
-
- tx->buf = kzalloc(ring_size * sizeof(*tx->buf), GFP_KERNEL);
- if (!tx->buf)
- return -ENOMEM;
-
- tx->descs_cpu = dma_alloc_coherent(&ag->pdev->dev, ring_size * AG71XX_DESC_SIZE,
- &tx->descs_dma, GFP_KERNEL);
- if (!tx->descs_cpu) {
- kfree(tx->buf);
- tx->buf = NULL;
- return -ENOMEM;
- }
-
- rx->buf = &tx->buf[tx_size];
- rx->descs_cpu = ((void *)tx->descs_cpu) + tx_size * AG71XX_DESC_SIZE;
- rx->descs_dma = tx->descs_dma + tx_size * AG71XX_DESC_SIZE;
-
- ag71xx_ring_tx_init(ag);
- return ag71xx_ring_rx_init(ag);
-}
-
-static void ag71xx_rings_free(struct ag71xx *ag)
-{
- struct ag71xx_ring *tx = &ag->tx_ring;
- struct ag71xx_ring *rx = &ag->rx_ring;
- int ring_size = BIT(tx->order) + BIT(rx->order);
-
- if (tx->descs_cpu)
- dma_free_coherent(&ag->pdev->dev, ring_size * AG71XX_DESC_SIZE,
- tx->descs_cpu, tx->descs_dma);
-
- kfree(tx->buf);
-
- tx->descs_cpu = NULL;
- rx->descs_cpu = NULL;
- tx->buf = NULL;
- rx->buf = NULL;
-}
-
-static void ag71xx_rings_cleanup(struct ag71xx *ag)
-{
- ag71xx_ring_rx_clean(ag);
- ag71xx_ring_tx_clean(ag);
- ag71xx_rings_free(ag);
-
- netdev_reset_queue(ag->dev);
-}
-
-static unsigned char *ag71xx_speed_str(struct ag71xx *ag)
-{
- switch (ag->speed) {
- case SPEED_1000:
- return "1000";
- case SPEED_100:
- return "100";
- case SPEED_10:
- return "10";
- }
-
- return "?";
-}
-
-static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
-{
- u32 t;
-
- t = (((u32) mac[5]) << 24) | (((u32) mac[4]) << 16)
- | (((u32) mac[3]) << 8) | ((u32) mac[2]);
-
- ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t);
-
- t = (((u32) mac[1]) << 24) | (((u32) mac[0]) << 16);
- ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t);
-}
-
-static void ag71xx_dma_reset(struct ag71xx *ag)
-{
- u32 val;
- int i;
-
- ag71xx_dump_dma_regs(ag);
-
- /* stop RX and TX */
- ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
- ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
-
- /*
- * give the hardware some time to really stop all rx/tx activity
- * clearing the descriptors too early causes random memory corruption
- */
- mdelay(1);
-
- /* clear descriptor addresses */
- ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->stop_desc_dma);
- ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->stop_desc_dma);
-
- /* clear pending RX/TX interrupts */
- for (i = 0; i < 256; i++) {
- ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
- ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
- }
-
- /* clear pending errors */
- ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF);
- ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR);
-
- val = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
- if (val)
- pr_alert("%s: unable to clear DMA Rx status: %08x\n",
- ag->dev->name, val);
-
- val = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
-
- /* mask out reserved bits */
- val &= ~0xff000000;
-
- if (val)
- pr_alert("%s: unable to clear DMA Tx status: %08x\n",
- ag->dev->name, val);
-
- ag71xx_dump_dma_regs(ag);
-}
-
-#define MAC_CFG1_INIT (MAC_CFG1_RXE | MAC_CFG1_TXE | \
- MAC_CFG1_SRX | MAC_CFG1_STX)
-
-#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
-
-#define FIFO_CFG4_INIT (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \
- FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \
- FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \
- FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \
- FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \
- FIFO_CFG4_VT)
-
-#define FIFO_CFG5_INIT (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \
- FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \
- FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \
- FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \
- FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \
- FIFO_CFG5_17 | FIFO_CFG5_SF)
-
-static void ag71xx_hw_stop(struct ag71xx *ag)
-{
- /* disable all interrupts and stop the rx/tx engine */
- ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);
- ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
- ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
-}
-
-static void ag71xx_hw_setup(struct ag71xx *ag)
-{
- struct device_node *np = ag->pdev->dev.of_node;
- u32 init = MAC_CFG1_INIT;
-
- /* setup MAC configuration registers */
- if (of_property_read_bool(np, "flow-control"))
- init |= MAC_CFG1_TFC | MAC_CFG1_RFC;
- ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, init);
-
- ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
- MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
-
- /* setup max frame length to zero */
- ag71xx_wr(ag, AG71XX_REG_MAC_MFL, 0);
-
- /* setup FIFO configuration registers */
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, ag->fifodata[0]);
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, ag->fifodata[1]);
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
-}
-
-static void ag71xx_hw_init(struct ag71xx *ag)
-{
- ag71xx_hw_stop(ag);
-
- ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR);
- udelay(20);
-
- reset_control_assert(ag->mac_reset);
- if (ag->mdio_reset)
- reset_control_assert(ag->mdio_reset);
- msleep(100);
- reset_control_deassert(ag->mac_reset);
- if (ag->mdio_reset)
- reset_control_deassert(ag->mdio_reset);
- msleep(200);
-
- ag71xx_hw_setup(ag);
-
- ag71xx_dma_reset(ag);
-}
-
-static void ag71xx_fast_reset(struct ag71xx *ag)
-{
- struct net_device *dev = ag->dev;
- u32 rx_ds;
- u32 mii_reg;
-
- ag71xx_hw_stop(ag);
- wmb();
-
- mii_reg = ag71xx_rr(ag, AG71XX_REG_MII_CFG);
- rx_ds = ag71xx_rr(ag, AG71XX_REG_RX_DESC);
-
- ag71xx_tx_packets(ag, true);
-
- reset_control_assert(ag->mac_reset);
- udelay(10);
- reset_control_deassert(ag->mac_reset);
- udelay(10);
-
- ag71xx_dma_reset(ag);
- ag71xx_hw_setup(ag);
- ag->tx_ring.curr = 0;
- ag->tx_ring.dirty = 0;
- netdev_reset_queue(ag->dev);
-
- /* setup max frame length */
- ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
- ag71xx_max_frame_len(ag->dev->mtu));
-
- ag71xx_wr(ag, AG71XX_REG_RX_DESC, rx_ds);
- ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
- ag71xx_wr(ag, AG71XX_REG_MII_CFG, mii_reg);
-
- ag71xx_hw_set_macaddr(ag, dev->dev_addr);
-}
-
-static void ag71xx_hw_start(struct ag71xx *ag)
-{
- /* start RX engine */
- ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
-
- /* enable interrupts */
- ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT);
-
- netif_wake_queue(ag->dev);
-}
-
-static void ath79_set_pllval(struct ag71xx *ag)
-{
- u32 pll_reg = ag->pllreg[1];
- u32 pll_val;
-
- if (!ag->pllregmap)
- return;
-
- switch (ag->speed) {
- case SPEED_10:
- pll_val = ag->plldata[2];
- break;
- case SPEED_100:
- pll_val = ag->plldata[1];
- break;
- case SPEED_1000:
- pll_val = ag->plldata[0];
- break;
- default:
- BUG();
- }
-
- if (pll_val)
- regmap_write(ag->pllregmap, pll_reg, pll_val);
-}
-
-static void ath79_set_pll(struct ag71xx *ag)
-{
- u32 pll_cfg = ag->pllreg[0];
- u32 pll_shift = ag->pllreg[2];
-
- if (!ag->pllregmap)
- return;
-
- regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 2 << pll_shift);
- udelay(100);
-
- ath79_set_pllval(ag);
-
- regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 3 << pll_shift);
- udelay(100);
-
- regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 0);
- udelay(100);
-}
-
-static void ag71xx_bit_set(void __iomem *reg, u32 bit)
-{
- u32 val;
-
- val = __raw_readl(reg) | bit;
- __raw_writel(val, reg);
- __raw_readl(reg);
-}
-
-static void ag71xx_bit_clear(void __iomem *reg, u32 bit)
-{
- u32 val;
-
- val = __raw_readl(reg) & ~bit;
- __raw_writel(val, reg);
- __raw_readl(reg);
-}
-
-static void ag71xx_sgmii_init_qca955x(struct device_node *np)
-{
- struct device_node *np_dev;
- void __iomem *gmac_base;
- u32 mr_an_status;
- u32 sgmii_status;
- u8 tries = 0;
- int err = 0;
-
- np = of_get_child_by_name(np, "gmac-config");
- if (!np)
- return;
-
- np_dev = of_parse_phandle(np, "device", 0);
- if (!np_dev)
- goto out;
-
- gmac_base = of_iomap(np_dev, 0);
- if (!gmac_base) {
- pr_err("%pOF: can't map GMAC registers\n", np_dev);
- err = -ENOMEM;
- goto err_iomap;
- }
-
- mr_an_status = __raw_readl(gmac_base + QCA955X_GMAC_REG_MR_AN_STATUS);
- if (!(mr_an_status & QCA955X_MR_AN_STATUS_AN_ABILITY))
- goto sgmii_out;
-
- /* SGMII reset sequence */
- __raw_writel(QCA955X_SGMII_RESET_RX_CLK_N_RESET,
- gmac_base + QCA955X_GMAC_REG_SGMII_RESET);
- __raw_readl(gmac_base + QCA955X_GMAC_REG_SGMII_RESET);
- udelay(10);
-
- ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
- QCA955X_SGMII_RESET_HW_RX_125M_N);
- udelay(10);
-
- ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
- QCA955X_SGMII_RESET_RX_125M_N);
- udelay(10);
-
- ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
- QCA955X_SGMII_RESET_TX_125M_N);
- udelay(10);
-
- ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
- QCA955X_SGMII_RESET_RX_CLK_N);
- udelay(10);
-
- ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
- QCA955X_SGMII_RESET_TX_CLK_N);
- udelay(10);
-
- /*
- * The following is what QCA has to say about what happens here:
- *
- * Across resets SGMII link status goes to weird state.
- * If SGMII_DEBUG register reads other than 0x1f or 0x10,
- * we are for sure in a bad state.
- *
- * Issue a PHY reset in MR_AN_CONTROL to keep going.
- */
- do {
- ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_MR_AN_CONTROL,
- QCA955X_MR_AN_CONTROL_PHY_RESET |
- QCA955X_MR_AN_CONTROL_AN_ENABLE);
- udelay(200);
- ag71xx_bit_clear(gmac_base + QCA955X_GMAC_REG_MR_AN_CONTROL,
- QCA955X_MR_AN_CONTROL_PHY_RESET);
- mdelay(300);
- sgmii_status = __raw_readl(gmac_base + QCA955X_GMAC_REG_SGMII_DEBUG) &
- QCA955X_SGMII_DEBUG_TX_STATE_MASK;
-
- if (tries++ >= 20) {
- pr_err("ag71xx: max retries for SGMII fixup exceeded\n");
- break;
- }
- } while (!(sgmii_status == 0xf || sgmii_status == 0x10));
-
-sgmii_out:
- iounmap(gmac_base);
-err_iomap:
- of_node_put(np_dev);
-out:
- of_node_put(np);
-}
-
-static void ath79_mii_ctrl_set_if(struct ag71xx *ag, unsigned int mii_if)
-{
- u32 t;
-
- t = __raw_readl(ag->mii_base);
- t &= ~(AR71XX_MII_CTRL_IF_MASK);
- t |= (mii_if & AR71XX_MII_CTRL_IF_MASK);
- __raw_writel(t, ag->mii_base);
-}
-
-static void ath79_mii0_ctrl_set_if(struct ag71xx *ag)
-{
- unsigned int mii_if;
-
- switch (ag->phy_if_mode) {
- case PHY_INTERFACE_MODE_MII:
- mii_if = AR71XX_MII0_CTRL_IF_MII;
- break;
- case PHY_INTERFACE_MODE_GMII:
- mii_if = AR71XX_MII0_CTRL_IF_GMII;
- break;
- case PHY_INTERFACE_MODE_RGMII:
- case PHY_INTERFACE_MODE_RGMII_ID:
- mii_if = AR71XX_MII0_CTRL_IF_RGMII;
- break;
- case PHY_INTERFACE_MODE_RMII:
- mii_if = AR71XX_MII0_CTRL_IF_RMII;
- break;
- default:
- WARN(1, "Impossible PHY mode defined.\n");
- return;
- }
-
- ath79_mii_ctrl_set_if(ag, mii_if);
-}
-
-static void ath79_mii1_ctrl_set_if(struct ag71xx *ag)
-{
- unsigned int mii_if;
-
- switch (ag->phy_if_mode) {
- case PHY_INTERFACE_MODE_RMII:
- mii_if = AR71XX_MII1_CTRL_IF_RMII;
- break;
- case PHY_INTERFACE_MODE_RGMII:
- case PHY_INTERFACE_MODE_RGMII_ID:
- mii_if = AR71XX_MII1_CTRL_IF_RGMII;
- break;
- default:
- WARN(1, "Impossible PHY mode defined.\n");
- return;
- }
-
- ath79_mii_ctrl_set_if(ag, mii_if);
-}
-
-static void ath79_mii_ctrl_set_speed(struct ag71xx *ag)
-{
- unsigned int mii_speed;
- u32 t;
-
- if (!ag->mii_base)
- return;
-
- switch (ag->speed) {
- case SPEED_10:
- mii_speed = AR71XX_MII_CTRL_SPEED_10;
- break;
- case SPEED_100:
- mii_speed = AR71XX_MII_CTRL_SPEED_100;
- break;
- case SPEED_1000:
- mii_speed = AR71XX_MII_CTRL_SPEED_1000;
- break;
- default:
- BUG();
- }
-
- t = __raw_readl(ag->mii_base);
- t &= ~(AR71XX_MII_CTRL_SPEED_MASK << AR71XX_MII_CTRL_SPEED_SHIFT);
- t |= mii_speed << AR71XX_MII_CTRL_SPEED_SHIFT;
- __raw_writel(t, ag->mii_base);
-}
-
-static void
-__ag71xx_link_adjust(struct ag71xx *ag, bool update)
-{
- struct device_node *np = ag->pdev->dev.of_node;
- u32 cfg2;
- u32 ifctl;
- u32 fifo5;
-
- if (!ag->link && update) {
- ag71xx_hw_stop(ag);
- netif_carrier_off(ag->dev);
- if (netif_msg_link(ag))
- pr_info("%s: link down\n", ag->dev->name);
- return;
- }
-
- if (!of_device_is_compatible(np, "qca,ar9130-eth") &&
- !of_device_is_compatible(np, "qca,ar7100-eth"))
- ag71xx_fast_reset(ag);
-
- cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
- cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
- cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
-
- ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
- ifctl &= ~(MAC_IFCTL_SPEED);
-
- fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
- fifo5 &= ~FIFO_CFG5_BM;
-
- switch (ag->speed) {
- case SPEED_1000:
- cfg2 |= MAC_CFG2_IF_1000;
- fifo5 |= FIFO_CFG5_BM;
- break;
- case SPEED_100:
- cfg2 |= MAC_CFG2_IF_10_100;
- ifctl |= MAC_IFCTL_SPEED;
- break;
- case SPEED_10:
- cfg2 |= MAC_CFG2_IF_10_100;
- break;
- default:
- BUG();
- return;
- }
-
- if (ag->tx_ring.desc_split) {
- ag->fifodata[2] &= 0xffff;
- ag->fifodata[2] |= ((2048 - ag->tx_ring.desc_split) / 4) << 16;
- }
-
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, ag->fifodata[2]);
-
- if (update) {
- if (of_device_is_compatible(np, "qca,ar7100-eth") ||
- of_device_is_compatible(np, "qca,ar9130-eth")) {
- ath79_set_pll(ag);
- ath79_mii_ctrl_set_speed(ag);
- } else if (of_device_is_compatible(np, "qca,ar7242-eth") ||
- of_device_is_compatible(np, "qca,ar9340-eth") ||
- of_device_is_compatible(np, "qca,qca9550-eth") ||
- of_device_is_compatible(np, "qca,qca9560-eth")) {
- ath79_set_pllval(ag);
- if (of_property_read_bool(np, "qca955x-sgmii-fixup"))
- ag71xx_sgmii_init_qca955x(np);
- }
- }
-
- ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
- ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
- ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
-
- if (of_device_is_compatible(np, "qca,qca9530-eth") ||
- of_device_is_compatible(np, "qca,qca9560-eth")) {
- /*
- * The rx ring buffer can stall on small packets on QCA953x and
- * QCA956x. Disabling the inline checksum engine fixes the stall.
- * The wr, rr functions cannot be used since this hidden register
- * is outside of the normal ag71xx register block.
- */
- void __iomem *dam = ioremap_nocache(0xb90001bc, 0x4);
- if (dam) {
- __raw_writel(__raw_readl(dam) & ~BIT(27), dam);
- (void)__raw_readl(dam);
- iounmap(dam);
- }
- }
-
- ag71xx_hw_start(ag);
-
- netif_carrier_on(ag->dev);
- if (update && netif_msg_link(ag))
- pr_info("%s: link up (%sMbps/%s duplex)\n",
- ag->dev->name,
- ag71xx_speed_str(ag),
- (DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
-
- ag71xx_dump_regs(ag);
-}
-
-void ag71xx_link_adjust(struct ag71xx *ag)
-{
- __ag71xx_link_adjust(ag, true);
-}
-
-static int ag71xx_hw_enable(struct ag71xx *ag)
-{
- int ret;
-
- ret = ag71xx_rings_init(ag);
- if (ret)
- return ret;
-
- napi_enable(&ag->napi);
- ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
- ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->rx_ring.descs_dma);
- netif_start_queue(ag->dev);
-
- return 0;
-}
-
-static void ag71xx_hw_disable(struct ag71xx *ag)
-{
- netif_stop_queue(ag->dev);
-
- ag71xx_hw_stop(ag);
- ag71xx_dma_reset(ag);
-
- napi_disable(&ag->napi);
- del_timer_sync(&ag->oom_timer);
-
- ag71xx_rings_cleanup(ag);
-}
-
-static int ag71xx_open(struct net_device *dev)
-{
- struct ag71xx *ag = netdev_priv(dev);
- unsigned int max_frame_len;
- int ret;
-
- netif_carrier_off(dev);
- max_frame_len = ag71xx_max_frame_len(dev->mtu);
- ag->rx_buf_size = SKB_DATA_ALIGN(max_frame_len + NET_SKB_PAD + NET_IP_ALIGN);
-
- /* setup max frame length */
- ag71xx_wr(ag, AG71XX_REG_MAC_MFL, max_frame_len);
- ag71xx_hw_set_macaddr(ag, dev->dev_addr);
-
- ret = ag71xx_hw_enable(ag);
- if (ret)
- goto err;
-
- phy_start(ag->phy_dev);
-
- return 0;
-
-err:
- ag71xx_rings_cleanup(ag);
- return ret;
-}
-
-static int ag71xx_stop(struct net_device *dev)
-{
- unsigned long flags;
- struct ag71xx *ag = netdev_priv(dev);
-
- netif_carrier_off(dev);
- phy_stop(ag->phy_dev);
-
- spin_lock_irqsave(&ag->lock, flags);
- if (ag->link) {
- ag->link = 0;
- ag71xx_link_adjust(ag);
- }
- spin_unlock_irqrestore(&ag->lock, flags);
-
- ag71xx_hw_disable(ag);
-
- return 0;
-}
-
-static int ag71xx_fill_dma_desc(struct ag71xx_ring *ring, u32 addr, int len)
-{
- int i;
- struct ag71xx_desc *desc;
- int ring_mask = BIT(ring->order) - 1;
- int ndesc = 0;
- int split = ring->desc_split;
-
- if (!split)
- split = len;
-
- while (len > 0) {
- unsigned int cur_len = len;
-
- i = (ring->curr + ndesc) & ring_mask;
- desc = ag71xx_ring_desc(ring, i);
-
- if (!ag71xx_desc_empty(desc))
- return -1;
-
- if (cur_len > split) {
- cur_len = split;
-
- /*
- * TX will hang if DMA transfers <= 4 bytes,
- * make sure next segment is more than 4 bytes long.
- */
- if (len <= split + 4)
- cur_len -= 4;
- }
-
- desc->data = addr;
- addr += cur_len;
- len -= cur_len;
-
- if (len > 0)
- cur_len |= DESC_MORE;
-
- /* prevent early tx attempt of this descriptor */
- if (!ndesc)
- cur_len |= DESC_EMPTY;
-
- desc->ctrl = cur_len;
- ndesc++;
- }
-
- return ndesc;
-}
-
-static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct ag71xx *ag = netdev_priv(dev);
- struct ag71xx_ring *ring = &ag->tx_ring;
- int ring_mask = BIT(ring->order) - 1;
- int ring_size = BIT(ring->order);
- struct ag71xx_desc *desc;
- dma_addr_t dma_addr;
- int i, n, ring_min;
-
- if (skb->len <= 4) {
- DBG("%s: packet len is too small\n", ag->dev->name);
- goto err_drop;
- }
-
- dma_addr = dma_map_single(&ag->pdev->dev, skb->data, skb->len,
- DMA_TO_DEVICE);
-
- i = ring->curr & ring_mask;
- desc = ag71xx_ring_desc(ring, i);
-
- /* setup descriptor fields */
- n = ag71xx_fill_dma_desc(ring, (u32) dma_addr, skb->len & ag->desc_pktlen_mask);
- if (n < 0)
- goto err_drop_unmap;
-
- i = (ring->curr + n - 1) & ring_mask;
- ring->buf[i].len = skb->len;
- ring->buf[i].skb = skb;
-
- netdev_sent_queue(dev, skb->len);
-
- skb_tx_timestamp(skb);
-
- desc->ctrl &= ~DESC_EMPTY;
- ring->curr += n;
-
- /* flush descriptor */
- wmb();
-
- ring_min = 2;
- if (ring->desc_split)
- ring_min *= AG71XX_TX_RING_DS_PER_PKT;
-
- if (ring->curr - ring->dirty >= ring_size - ring_min) {
- DBG("%s: tx queue full\n", dev->name);
- netif_stop_queue(dev);
- }
-
- DBG("%s: packet injected into TX queue\n", ag->dev->name);
-
- /* enable TX engine */
- ag71xx_wr(ag, AG71XX_REG_TX_CTRL, TX_CTRL_TXE);
-
- return NETDEV_TX_OK;
-
-err_drop_unmap:
- dma_unmap_single(&ag->pdev->dev, dma_addr, skb->len, DMA_TO_DEVICE);
-
-err_drop:
- dev->stats.tx_dropped++;
-
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
-}
-
-static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-{
- struct ag71xx *ag = netdev_priv(dev);
-
-
- switch (cmd) {
- case SIOCSIFHWADDR:
- if (copy_from_user
- (dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr)))
- return -EFAULT;
- return 0;
-
- case SIOCGIFHWADDR:
- if (copy_to_user
- (ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr)))
- return -EFAULT;
- return 0;
-
- case SIOCGMIIPHY:
- case SIOCGMIIREG:
- case SIOCSMIIREG:
- if (ag->phy_dev == NULL)
- break;
-
- return phy_mii_ioctl(ag->phy_dev, ifr, cmd);
-
- default:
- break;
- }
-
- return -EOPNOTSUPP;
-}
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,15,0))
-static void ag71xx_oom_timer_handler(unsigned long data)
-{
- struct net_device *dev = (struct net_device *) data;
- struct ag71xx *ag = netdev_priv(dev);
-#else
-static void ag71xx_oom_timer_handler(struct timer_list *t)
-{
- struct ag71xx *ag = from_timer(ag, t, oom_timer);
-#endif
-
- napi_schedule(&ag->napi);
-}
-
-static void ag71xx_tx_timeout(struct net_device *dev)
-{
- struct ag71xx *ag = netdev_priv(dev);
-
- if (netif_msg_tx_err(ag))
- pr_info("%s: tx timeout\n", ag->dev->name);
-
- schedule_delayed_work(&ag->restart_work, 1);
-}
-
-static void ag71xx_restart_work_func(struct work_struct *work)
-{
- struct ag71xx *ag = container_of(work, struct ag71xx, restart_work.work);
-
- rtnl_lock();
- ag71xx_hw_disable(ag);
- ag71xx_hw_enable(ag);
- if (ag->link)
- __ag71xx_link_adjust(ag, false);
- rtnl_unlock();
-}
-
-static bool ag71xx_check_dma_stuck(struct ag71xx *ag)
-{
- unsigned long timestamp;
- u32 rx_sm, tx_sm, rx_fd;
-
- timestamp = netdev_get_tx_queue(ag->dev, 0)->trans_start;
- if (likely(time_before(jiffies, timestamp + HZ/10)))
- return false;
-
- if (!netif_carrier_ok(ag->dev))
- return false;
-
- rx_sm = ag71xx_rr(ag, AG71XX_REG_RX_SM);
- if ((rx_sm & 0x7) == 0x3 && ((rx_sm >> 4) & 0x7) == 0x6)
- return true;
-
- tx_sm = ag71xx_rr(ag, AG71XX_REG_TX_SM);
- rx_fd = ag71xx_rr(ag, AG71XX_REG_FIFO_DEPTH);
- if (((tx_sm >> 4) & 0x7) == 0 && ((rx_sm & 0x7) == 0) &&
- ((rx_sm >> 4) & 0x7) == 0 && rx_fd == 0)
- return true;
-
- return false;
-}
-
-static int ag71xx_tx_packets(struct ag71xx *ag, bool flush)
-{
- struct ag71xx_ring *ring = &ag->tx_ring;
- bool dma_stuck = false;
- int ring_mask = BIT(ring->order) - 1;
- int ring_size = BIT(ring->order);
- int sent = 0;
- int bytes_compl = 0;
- int n = 0;
-
- DBG("%s: processing TX ring\n", ag->dev->name);
-
- while (ring->dirty + n != ring->curr) {
- unsigned int i = (ring->dirty + n) & ring_mask;
- struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
- struct sk_buff *skb = ring->buf[i].skb;
-
- if (!flush && !ag71xx_desc_empty(desc)) {
- if (ag->tx_hang_workaround &&
- ag71xx_check_dma_stuck(ag)) {
- schedule_delayed_work(&ag->restart_work, HZ / 2);
- dma_stuck = true;
- }
- break;
- }
-
- if (flush)
- desc->ctrl |= DESC_EMPTY;
-
- n++;
- if (!skb)
- continue;
-
- dev_kfree_skb_any(skb);
- ring->buf[i].skb = NULL;
-
- bytes_compl += ring->buf[i].len;
-
- sent++;
- ring->dirty += n;
-
- while (n > 0) {
- ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
- n--;
- }
- }
-
- DBG("%s: %d packets sent out\n", ag->dev->name, sent);
-
- if (!sent)
- return 0;
-
- ag->dev->stats.tx_bytes += bytes_compl;
- ag->dev->stats.tx_packets += sent;
-
- netdev_completed_queue(ag->dev, sent, bytes_compl);
- if ((ring->curr - ring->dirty) < (ring_size * 3) / 4)
- netif_wake_queue(ag->dev);
-
- if (!dma_stuck)
- cancel_delayed_work(&ag->restart_work);
-
- return sent;
-}
-
-static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
-{
- struct net_device *dev = ag->dev;
- struct ag71xx_ring *ring = &ag->rx_ring;
- unsigned int pktlen_mask = ag->desc_pktlen_mask;
- unsigned int offset = ag->rx_buf_offset;
- int ring_mask = BIT(ring->order) - 1;
- int ring_size = BIT(ring->order);
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
- struct list_head rx_list;
- struct sk_buff *next;
-#else
- struct sk_buff_head queue;
-#endif
- struct sk_buff *skb;
- int done = 0;
-
- DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n",
- dev->name, limit, ring->curr, ring->dirty);
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
- INIT_LIST_HEAD(&rx_list);
-#else
- skb_queue_head_init(&queue);
-#endif
-
- while (done < limit) {
- unsigned int i = ring->curr & ring_mask;
- struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
- int pktlen;
- int err = 0;
-
- if (ag71xx_desc_empty(desc))
- break;
-
- if ((ring->dirty + ring_size) == ring->curr) {
- ag71xx_assert(0);
- break;
- }
-
- ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
-
- pktlen = desc->ctrl & pktlen_mask;
- pktlen -= ETH_FCS_LEN;
-
- dma_unmap_single(&ag->pdev->dev, ring->buf[i].dma_addr,
- ag->rx_buf_size, DMA_FROM_DEVICE);
-
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pktlen;
-
- skb = build_skb(ring->buf[i].rx_buf, ag71xx_buffer_size(ag));
- if (!skb) {
- skb_free_frag(ring->buf[i].rx_buf);
- goto next;
- }
-
- skb_reserve(skb, offset);
- skb_put(skb, pktlen);
-
- if (err) {
- dev->stats.rx_dropped++;
- kfree_skb(skb);
- } else {
- skb->dev = dev;
- skb->ip_summed = CHECKSUM_NONE;
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
- list_add_tail(&skb->list, &rx_list);
-#else
- __skb_queue_tail(&queue, skb);
-#endif
- }
-
-next:
- ring->buf[i].rx_buf = NULL;
- done++;
-
- ring->curr++;
- }
-
- ag71xx_ring_rx_refill(ag);
-
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
- list_for_each_entry_safe(skb, next, &rx_list, list)
- skb->protocol = eth_type_trans(skb, dev);
- netif_receive_skb_list(&rx_list);
-#else
- while ((skb = __skb_dequeue(&queue)) != NULL) {
- skb->protocol = eth_type_trans(skb, dev);
- netif_receive_skb(skb);
- }
-#endif
-
- DBG("%s: rx finish, curr=%u, dirty=%u, done=%d\n",
- dev->name, ring->curr, ring->dirty, done);
-
- return done;
-}
-
-static int ag71xx_poll(struct napi_struct *napi, int limit)
-{
- struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
- struct net_device *dev = ag->dev;
- struct ag71xx_ring *rx_ring = &ag->rx_ring;
- int rx_ring_size = BIT(rx_ring->order);
- unsigned long flags;
- u32 status;
- int tx_done;
- int rx_done;
-
- tx_done = ag71xx_tx_packets(ag, false);
-
- DBG("%s: processing RX ring\n", dev->name);
- rx_done = ag71xx_rx_packets(ag, limit);
-
- ag71xx_debugfs_update_napi_stats(ag, rx_done, tx_done);
-
- if (rx_ring->buf[rx_ring->dirty % rx_ring_size].rx_buf == NULL)
- goto oom;
-
- status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
- if (unlikely(status & RX_STATUS_OF)) {
- ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF);
- dev->stats.rx_fifo_errors++;
-
- /* restart RX */
- ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
- }
-
- if (rx_done < limit) {
- if (status & RX_STATUS_PR)
- goto more;
-
- status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
- if (status & TX_STATUS_PS)
- goto more;
-
- DBG("%s: disable polling mode, rx=%d, tx=%d,limit=%d\n",
- dev->name, rx_done, tx_done, limit);
-
- napi_complete(napi);
-
- /* enable interrupts */
- spin_lock_irqsave(&ag->lock, flags);
- ag71xx_int_enable(ag, AG71XX_INT_POLL);
- spin_unlock_irqrestore(&ag->lock, flags);
- return rx_done;
- }
-
-more:
- DBG("%s: stay in polling mode, rx=%d, tx=%d, limit=%d\n",
- dev->name, rx_done, tx_done, limit);
- return limit;
-
-oom:
- if (netif_msg_rx_err(ag))
- pr_info("%s: out of memory\n", dev->name);
-
- mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL);
- napi_complete(napi);
- return 0;
-}
-
-static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct ag71xx *ag = netdev_priv(dev);
- u32 status;
-
- status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
- ag71xx_dump_intr(ag, "raw", status);
-
- if (unlikely(!status))
- return IRQ_NONE;
-
- if (unlikely(status & AG71XX_INT_ERR)) {
- if (status & AG71XX_INT_TX_BE) {
- ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE);
- dev_err(&dev->dev, "TX BUS error\n");
- }
- if (status & AG71XX_INT_RX_BE) {
- ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE);
- dev_err(&dev->dev, "RX BUS error\n");
- }
- }
-
- if (likely(status & AG71XX_INT_POLL)) {
- ag71xx_int_disable(ag, AG71XX_INT_POLL);
- DBG("%s: enable polling mode\n", dev->name);
- napi_schedule(&ag->napi);
- }
-
- ag71xx_debugfs_update_int_stats(ag, status);
-
- return IRQ_HANDLED;
-}
-
-static int ag71xx_change_mtu(struct net_device *dev, int new_mtu)
-{
- struct ag71xx *ag = netdev_priv(dev);
-
- dev->mtu = new_mtu;
- ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
- ag71xx_max_frame_len(dev->mtu));
-
- return 0;
-}
-
-static const struct net_device_ops ag71xx_netdev_ops = {
- .ndo_open = ag71xx_open,
- .ndo_stop = ag71xx_stop,
- .ndo_start_xmit = ag71xx_hard_start_xmit,
- .ndo_do_ioctl = ag71xx_do_ioctl,
- .ndo_tx_timeout = ag71xx_tx_timeout,
- .ndo_change_mtu = ag71xx_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-static int ag71xx_probe(struct platform_device *pdev)
-{
- struct device_node *np = pdev->dev.of_node;
- struct net_device *dev;
- struct resource *res;
- struct ag71xx *ag;
- const void *mac_addr;
- u32 max_frame_len;
- int tx_size, err;
-
- if (!np)
- return -ENODEV;
-
- dev = devm_alloc_etherdev(&pdev->dev, sizeof(*ag));
- if (!dev)
- return -ENOMEM;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -EINVAL;
-
- err = ag71xx_setup_gmac(np);
- if (err)
- return err;
-
- SET_NETDEV_DEV(dev, &pdev->dev);
-
- ag = netdev_priv(dev);
- ag->pdev = pdev;
- ag->dev = dev;
- ag->msg_enable = netif_msg_init(ag71xx_msg_level,
- AG71XX_DEFAULT_MSG_ENABLE);
- spin_lock_init(&ag->lock);
-
- ag->mac_reset = devm_reset_control_get_exclusive(&pdev->dev, "mac");
- if (IS_ERR(ag->mac_reset)) {
- dev_err(&pdev->dev, "missing mac reset\n");
- return PTR_ERR(ag->mac_reset);
- }
-
- ag->mdio_reset = devm_reset_control_get_optional_exclusive(&pdev->dev, "mdio");
-
- if (of_property_read_u32_array(np, "fifo-data", ag->fifodata, 3)) {
- if (of_device_is_compatible(np, "qca,ar9130-eth") ||
- of_device_is_compatible(np, "qca,ar7100-eth")) {
- ag->fifodata[0] = 0x0fff0000;
- ag->fifodata[1] = 0x00001fff;
- } else {
- ag->fifodata[0] = 0x0010ffff;
- ag->fifodata[1] = 0x015500aa;
- ag->fifodata[2] = 0x01f00140;
- }
- if (of_device_is_compatible(np, "qca,ar9130-eth"))
- ag->fifodata[2] = 0x00780fff;
- else if (of_device_is_compatible(np, "qca,ar7100-eth"))
- ag->fifodata[2] = 0x008001ff;
- }
-
- if (of_property_read_u32_array(np, "pll-data", ag->plldata, 3))
- dev_dbg(&pdev->dev, "failed to read pll-data property\n");
-
- if (of_property_read_u32_array(np, "pll-reg", ag->pllreg, 3))
- dev_dbg(&pdev->dev, "failed to read pll-reg property\n");
-
- ag->pllregmap = syscon_regmap_lookup_by_phandle(np, "pll-handle");
- if (IS_ERR(ag->pllregmap)) {
- dev_dbg(&pdev->dev, "failed to read pll-handle property\n");
- ag->pllregmap = NULL;
- }
-
- ag->mac_base = devm_ioremap_nocache(&pdev->dev, res->start,
- res->end - res->start + 1);
- if (!ag->mac_base)
- return -ENOMEM;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (res) {
- ag->mii_base = devm_ioremap_nocache(&pdev->dev, res->start,
- res->end - res->start + 1);
- if (!ag->mii_base)
- return -ENOMEM;
- }
-
- dev->irq = platform_get_irq(pdev, 0);
- err = devm_request_irq(&pdev->dev, dev->irq, ag71xx_interrupt,
- 0x0, dev_name(&pdev->dev), dev);
- if (err) {
- dev_err(&pdev->dev, "unable to request IRQ %d\n", dev->irq);
- return err;
- }
-
- dev->netdev_ops = &ag71xx_netdev_ops;
- dev->ethtool_ops = &ag71xx_ethtool_ops;
-
- INIT_DELAYED_WORK(&ag->restart_work, ag71xx_restart_work_func);
-
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,15,0))
- init_timer(&ag->oom_timer);
- ag->oom_timer.data = (unsigned long) dev;
- ag->oom_timer.function = ag71xx_oom_timer_handler;
-#else
- timer_setup(&ag->oom_timer, ag71xx_oom_timer_handler, 0);
-#endif
-
- tx_size = AG71XX_TX_RING_SIZE_DEFAULT;
- ag->rx_ring.order = ag71xx_ring_size_order(AG71XX_RX_RING_SIZE_DEFAULT);
-
- if (of_device_is_compatible(np, "qca,ar9340-eth") ||
- of_device_is_compatible(np, "qca,qca9530-eth") ||
- of_device_is_compatible(np, "qca,qca9550-eth") ||
- of_device_is_compatible(np, "qca,qca9560-eth"))
- ag->desc_pktlen_mask = SZ_16K - 1;
- else
- ag->desc_pktlen_mask = SZ_4K - 1;
-
- if (ag->desc_pktlen_mask == SZ_16K - 1 &&
- !of_device_is_compatible(np, "qca,qca9550-eth") &&
- !of_device_is_compatible(np, "qca,qca9560-eth"))
- max_frame_len = ag->desc_pktlen_mask;
- else
- max_frame_len = 1540;
-
- dev->min_mtu = 68;
- dev->max_mtu = max_frame_len - ag71xx_max_frame_len(0);
-
- if (of_device_is_compatible(np, "qca,ar7240-eth") ||
- of_device_is_compatible(np, "qca,ar7241-eth") ||
- of_device_is_compatible(np, "qca,ar7242-eth") ||
- of_device_is_compatible(np, "qca,ar9330-eth") ||
- of_device_is_compatible(np, "qca,ar9340-eth") ||
- of_device_is_compatible(np, "qca,qca9530-eth") ||
- of_device_is_compatible(np, "qca,qca9550-eth") ||
- of_device_is_compatible(np, "qca,qca9560-eth"))
- ag->tx_hang_workaround = 1;
-
- ag->rx_buf_offset = NET_SKB_PAD;
- if (!of_device_is_compatible(np, "qca,ar7100-eth") &&
- !of_device_is_compatible(np, "qca,ar9130-eth"))
- ag->rx_buf_offset += NET_IP_ALIGN;
-
- if (of_device_is_compatible(np, "qca,ar7100-eth")) {
- ag->tx_ring.desc_split = AG71XX_TX_RING_SPLIT;
- tx_size *= AG71XX_TX_RING_DS_PER_PKT;
- }
- ag->tx_ring.order = ag71xx_ring_size_order(tx_size);
-
- ag->stop_desc = dmam_alloc_coherent(&pdev->dev,
- sizeof(struct ag71xx_desc),
- &ag->stop_desc_dma, GFP_KERNEL);
- if (!ag->stop_desc)
- return -ENOMEM;
-
- ag->stop_desc->data = 0;
- ag->stop_desc->ctrl = 0;
- ag->stop_desc->next = (u32) ag->stop_desc_dma;
-
- mac_addr = of_get_mac_address(np);
- if (mac_addr)
- memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
- if (!mac_addr || !is_valid_ether_addr(dev->dev_addr)) {
- dev_err(&pdev->dev, "invalid MAC address, using random address\n");
- eth_random_addr(dev->dev_addr);
- }
-
- ag->phy_if_mode = of_get_phy_mode(np);
- if (ag->phy_if_mode < 0) {
- dev_err(&pdev->dev, "missing phy-mode property in DT\n");
- return ag->phy_if_mode;
- }
-
- if (of_property_read_u32(np, "qca,mac-idx", &ag->mac_idx))
- ag->mac_idx = -1;
- if (ag->mii_base)
- switch (ag->mac_idx) {
- case 0:
- ath79_mii0_ctrl_set_if(ag);
- break;
- case 1:
- ath79_mii1_ctrl_set_if(ag);
- break;
- default:
- break;
- }
-
- netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
-
- ag71xx_dump_regs(ag);
-
- ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, 0);
-
- ag71xx_hw_init(ag);
-
- ag71xx_dump_regs(ag);
-
- /*
- * populate current node to register mdio-bus as a subdevice.
- * the mdio bus works independently on ar7241 and later chips
- * and we need to load mdio1 before gmac0, which can be done
- * by adding a "simple-mfd" compatible to gmac node. The
- * following code checks OF_POPULATED_BUS flag before populating
- * to avoid duplicated population.
- */
- if (!of_node_check_flag(np, OF_POPULATED_BUS)) {
- err = of_platform_populate(np, NULL, NULL, &pdev->dev);
- if (err)
- return err;
- }
-
- err = ag71xx_phy_connect(ag);
- if (err)
- return err;
-
- err = ag71xx_debugfs_init(ag);
- if (err)
- goto err_phy_disconnect;
-
- platform_set_drvdata(pdev, dev);
-
- err = register_netdev(dev);
- if (err) {
- dev_err(&pdev->dev, "unable to register net device\n");
- platform_set_drvdata(pdev, NULL);
- ag71xx_debugfs_exit(ag);
- goto err_phy_disconnect;
- }
-
- pr_info("%s: Atheros AG71xx at 0x%08lx, irq %d, mode: %s\n",
- dev->name, (unsigned long) ag->mac_base, dev->irq,
- phy_modes(ag->phy_if_mode));
-
- return 0;
-
-err_phy_disconnect:
- ag71xx_phy_disconnect(ag);
- return err;
-}
-
-static int ag71xx_remove(struct platform_device *pdev)
-{
- struct net_device *dev = platform_get_drvdata(pdev);
- struct ag71xx *ag;
-
- if (!dev)
- return 0;
-
- ag = netdev_priv(dev);
- ag71xx_debugfs_exit(ag);
- ag71xx_phy_disconnect(ag);
- unregister_netdev(dev);
- platform_set_drvdata(pdev, NULL);
- return 0;
-}
-
-static const struct of_device_id ag71xx_match[] = {
- { .compatible = "qca,ar7100-eth" },
- { .compatible = "qca,ar7240-eth" },
- { .compatible = "qca,ar7241-eth" },
- { .compatible = "qca,ar7242-eth" },
- { .compatible = "qca,ar9130-eth" },
- { .compatible = "qca,ar9330-eth" },
- { .compatible = "qca,ar9340-eth" },
- { .compatible = "qca,qca9530-eth" },
- { .compatible = "qca,qca9550-eth" },
- { .compatible = "qca,qca9560-eth" },
- {}
-};
-
-static struct platform_driver ag71xx_driver = {
- .probe = ag71xx_probe,
- .remove = ag71xx_remove,
- .driver = {
- .name = AG71XX_DRV_NAME,
- .of_match_table = ag71xx_match,
- }
-};
-
-static int __init ag71xx_module_init(void)
-{
- int ret;
-
- ret = ag71xx_debugfs_root_init();
- if (ret)
- goto err_out;
-
- ret = platform_driver_register(&ag71xx_driver);
- if (ret)
- goto err_debugfs_exit;
-
- return 0;
-
-err_debugfs_exit:
- ag71xx_debugfs_root_exit();
-err_out:
- return ret;
-}
-
-static void __exit ag71xx_module_exit(void)
-{
- platform_driver_unregister(&ag71xx_driver);
- ag71xx_debugfs_root_exit();
-}
-
-module_init(ag71xx_module_init);
-module_exit(ag71xx_module_exit);
-
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>");
-MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" AG71XX_DRV_NAME);
+++ /dev/null
-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
- *
- * Based on Atheros' AG7100 driver
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include <linux/clk.h>
-#include <linux/of_mdio.h>
-#include "ag71xx.h"
-
-#define AG71XX_MDIO_RETRY 1000
-#define AG71XX_MDIO_DELAY 5
-
-static int bus_count;
-
-static int ag71xx_mdio_wait_busy(struct ag71xx_mdio *am)
-{
- int i;
-
- for (i = 0; i < AG71XX_MDIO_RETRY; i++) {
- u32 busy;
-
- udelay(AG71XX_MDIO_DELAY);
-
- regmap_read(am->mii_regmap, AG71XX_REG_MII_IND, &busy);
- if (!busy)
- return 0;
-
- udelay(AG71XX_MDIO_DELAY);
- }
-
- pr_err("%s: MDIO operation timed out\n", am->mii_bus->name);
-
- return -ETIMEDOUT;
-}
-
-static int ag71xx_mdio_mii_read(struct mii_bus *bus, int addr, int reg)
-{
- struct ag71xx_mdio *am = bus->priv;
- int err;
- int ret;
-
- err = ag71xx_mdio_wait_busy(am);
- if (err)
- return 0xffff;
-
- regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
- regmap_write(am->mii_regmap, AG71XX_REG_MII_ADDR,
- ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
- regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_READ);
-
- err = ag71xx_mdio_wait_busy(am);
- if (err)
- return 0xffff;
-
- regmap_read(am->mii_regmap, AG71XX_REG_MII_STATUS, &ret);
- ret &= 0xffff;
- regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
-
- DBG("mii_read: addr=%04x, reg=%04x, value=%04x\n", addr, reg, ret);
-
- return ret;
-}
-
-static int ag71xx_mdio_mii_write(struct mii_bus *bus, int addr, int reg, u16 val)
-{
- struct ag71xx_mdio *am = bus->priv;
-
- DBG("mii_write: addr=%04x, reg=%04x, value=%04x\n", addr, reg, val);
-
- regmap_write(am->mii_regmap, AG71XX_REG_MII_ADDR,
- ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
- regmap_write(am->mii_regmap, AG71XX_REG_MII_CTRL, val);
-
- ag71xx_mdio_wait_busy(am);
-
- return 0;
-}
-
-static const u32 ar71xx_mdio_div_table[] = {
- 4, 4, 6, 8, 10, 14, 20, 28,
-};
-
-static const u32 ar7240_mdio_div_table[] = {
- 2, 2, 4, 6, 8, 12, 18, 26, 32, 40, 48, 56, 62, 70, 78, 96,
-};
-
-static const u32 ar933x_mdio_div_table[] = {
- 4, 4, 6, 8, 10, 14, 20, 28, 34, 42, 50, 58, 66, 74, 82, 98,
-};
-
-static int ag71xx_mdio_get_divider(struct device_node *np, u32 *div)
-{
- struct clk *ref_clk = of_clk_get(np, 0);
- unsigned long ref_clock;
- u32 mdio_clock;
- const u32 *table;
- int ndivs, i;
-
- if (IS_ERR(ref_clk))
- return -EINVAL;
-
- ref_clock = clk_get_rate(ref_clk);
- clk_put(ref_clk);
-
- if(of_property_read_u32(np, "qca,mdio-max-frequency", &mdio_clock)) {
- if (of_property_read_bool(np, "builtin-switch"))
- mdio_clock = 5000000;
- else
- mdio_clock = 2000000;
- }
-
- if (of_device_is_compatible(np, "qca,ar9330-mdio") ||
- of_device_is_compatible(np, "qca,ar9340-mdio")) {
- table = ar933x_mdio_div_table;
- ndivs = ARRAY_SIZE(ar933x_mdio_div_table);
- } else if (of_device_is_compatible(np, "qca,ar7240-mdio")) {
- table = ar7240_mdio_div_table;
- ndivs = ARRAY_SIZE(ar7240_mdio_div_table);
- } else {
- table = ar71xx_mdio_div_table;
- ndivs = ARRAY_SIZE(ar71xx_mdio_div_table);
- }
-
- for (i = 0; i < ndivs; i++) {
- unsigned long t;
-
- t = ref_clock / table[i];
- if (t <= mdio_clock) {
- *div = i;
- return 0;
- }
- }
-
- return -ENOENT;
-}
-
-static int ag71xx_mdio_reset(struct mii_bus *bus)
-{
- struct device_node *np = bus->dev.of_node;
- struct ag71xx_mdio *am = bus->priv;
- bool builtin_switch;
- u32 t;
-
- builtin_switch = of_property_read_bool(np, "builtin-switch");
-
- if (ag71xx_mdio_get_divider(np, &t)) {
- if (of_device_is_compatible(np, "qca,ar9340-mdio"))
- t = MII_CFG_CLK_DIV_58;
- else if (builtin_switch)
- t = MII_CFG_CLK_DIV_10;
- else
- t = MII_CFG_CLK_DIV_28;
- }
-
- regmap_write(am->mii_regmap, AG71XX_REG_MII_CFG, t | MII_CFG_RESET);
- udelay(100);
-
- regmap_write(am->mii_regmap, AG71XX_REG_MII_CFG, t);
- udelay(100);
-
- return 0;
-}
-
-static int ag71xx_mdio_probe(struct platform_device *pdev)
-{
- struct device *amdev = &pdev->dev;
- struct device_node *np = pdev->dev.of_node;
- struct ag71xx_mdio *am;
- struct mii_bus *mii_bus;
- bool builtin_switch;
- int i, err;
-
- am = devm_kzalloc(amdev, sizeof(*am), GFP_KERNEL);
- if (!am)
- return -ENOMEM;
-
- am->mii_regmap = syscon_regmap_lookup_by_phandle(np, "regmap");
- if (IS_ERR(am->mii_regmap))
- return PTR_ERR(am->mii_regmap);
-
- mii_bus = devm_mdiobus_alloc(amdev);
- if (!mii_bus)
- return -ENOMEM;
-
- am->mdio_reset = devm_reset_control_get_exclusive(amdev, "mdio");
- builtin_switch = of_property_read_bool(np, "builtin-switch");
-
- mii_bus->name = "ag71xx_mdio";
- mii_bus->read = ag71xx_mdio_mii_read;
- mii_bus->write = ag71xx_mdio_mii_write;
- mii_bus->reset = ag71xx_mdio_reset;
- mii_bus->priv = am;
- mii_bus->parent = amdev;
- snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%s.%d", np->name, bus_count++);
-
- if (!builtin_switch &&
- of_property_read_u32(np, "phy-mask", &mii_bus->phy_mask))
- mii_bus->phy_mask = 0;
-
- for (i = 0; i < PHY_MAX_ADDR; i++)
- mii_bus->irq[i] = PHY_POLL;
-
- if (!IS_ERR(am->mdio_reset)) {
- reset_control_assert(am->mdio_reset);
- msleep(100);
- reset_control_deassert(am->mdio_reset);
- msleep(200);
- }
-
- err = of_mdiobus_register(mii_bus, np);
- if (err)
- return err;
-
- am->mii_bus = mii_bus;
- platform_set_drvdata(pdev, am);
-
- return 0;
-}
-
-static int ag71xx_mdio_remove(struct platform_device *pdev)
-{
- struct ag71xx_mdio *am = platform_get_drvdata(pdev);
-
- mdiobus_unregister(am->mii_bus);
- return 0;
-}
-
-static const struct of_device_id ag71xx_mdio_match[] = {
- { .compatible = "qca,ar7240-mdio" },
- { .compatible = "qca,ar9330-mdio" },
- { .compatible = "qca,ar9340-mdio" },
- { .compatible = "qca,ath79-mdio" },
- {}
-};
-
-static struct platform_driver ag71xx_mdio_driver = {
- .probe = ag71xx_mdio_probe,
- .remove = ag71xx_mdio_remove,
- .driver = {
- .name = "ag71xx-mdio",
- .of_match_table = ag71xx_mdio_match,
- }
-};
-
-module_platform_driver(ag71xx_mdio_driver);
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Atheros AR71xx built-in ethernet mac driver
- *
- * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
- *
- * Based on Atheros' AG7100 driver
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- */
-
-#include <linux/of_mdio.h>
-#include "ag71xx.h"
-
-static void ag71xx_phy_link_adjust(struct net_device *dev)
-{
- struct ag71xx *ag = netdev_priv(dev);
- struct phy_device *phydev = ag->phy_dev;
- unsigned long flags;
- int status_change = 0;
-
- spin_lock_irqsave(&ag->lock, flags);
-
- if (phydev->link) {
- if (ag->duplex != phydev->duplex
- || ag->speed != phydev->speed) {
- status_change = 1;
- }
- }
-
- if (phydev->link != ag->link)
- status_change = 1;
-
- ag->link = phydev->link;
- ag->duplex = phydev->duplex;
- ag->speed = phydev->speed;
-
- if (status_change)
- ag71xx_link_adjust(ag);
-
- spin_unlock_irqrestore(&ag->lock, flags);
-}
-
-int ag71xx_phy_connect(struct ag71xx *ag)
-{
- struct device_node *np = ag->pdev->dev.of_node;
- struct device_node *phy_node;
- int ret;
-
- if (of_phy_is_fixed_link(np)) {
- ret = of_phy_register_fixed_link(np);
- if (ret < 0) {
- dev_err(&ag->pdev->dev,
- "Failed to register fixed PHY link: %d\n", ret);
- return ret;
- }
-
- phy_node = of_node_get(np);
- } else {
- phy_node = of_parse_phandle(np, "phy-handle", 0);
- }
-
- if (!phy_node) {
- dev_err(&ag->pdev->dev,
- "Could not find valid phy node\n");
- return -ENODEV;
- }
-
- ag->phy_dev = of_phy_connect(ag->dev, phy_node, ag71xx_phy_link_adjust,
- 0, ag->phy_if_mode);
-
- of_node_put(phy_node);
-
- if (!ag->phy_dev) {
- dev_err(&ag->pdev->dev,
- "Could not connect to PHY device. Deferring probe.\n");
- return -EPROBE_DEFER;
- }
-
- dev_info(&ag->pdev->dev, "connected to PHY at %s [uid=%08x, driver=%s]\n",
- phydev_name(ag->phy_dev),
- ag->phy_dev->phy_id, ag->phy_dev->drv->name);
-
- return 0;
-}
-
-void ag71xx_phy_disconnect(struct ag71xx *ag)
-{
- phy_disconnect(ag->phy_dev);
-}
--- /dev/null
+config AG71XX
+ tristate "Atheros AR7XXX/AR9XXX built-in ethernet mac support"
+ depends on ATH79
+ select PHYLIB
+ help
+ If you wish to compile a kernel for AR7XXX/91XXX and enable
+ ethernet support, then you should always answer Y to this.
+
+if AG71XX
+
+config AG71XX_DEBUG
+ bool "Atheros AR71xx built-in ethernet driver debugging"
+ default n
+ help
+ Atheros AR71xx built-in ethernet driver debugging messages.
+
+config AG71XX_DEBUG_FS
+ bool "Atheros AR71xx built-in ethernet driver debugfs support"
+ depends on DEBUG_FS
+ default n
+ help
+ Say Y, if you need access to various statistics provided by
+ the ag71xx driver.
+
+endif
--- /dev/null
+#
+# Makefile for the Atheros AR71xx built-in ethernet macs
+#
+
+ag71xx-y += ag71xx_main.o
+ag71xx-y += ag71xx_gmac.o
+ag71xx-y += ag71xx_ethtool.o
+ag71xx-y += ag71xx_phy.o
+
+ag71xx-$(CONFIG_AG71XX_DEBUG_FS) += ag71xx_debugfs.o
+
+obj-$(CONFIG_AG71XX) += ag71xx_mdio.o
+obj-$(CONFIG_AG71XX) += ag71xx.o
--- /dev/null
+/*
+ * Atheros AR71xx built-in ethernet mac driver
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Based on Atheros' AG7100 driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#ifndef __AG71XX_H
+#define __AG71XX_H
+
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/random.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/if_vlan.h>
+#include <linux/phy.h>
+#include <linux/skbuff.h>
+#include <linux/dma-mapping.h>
+#include <linux/workqueue.h>
+#include <linux/reset.h>
+#include <linux/of.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+#include <linux/bitops.h>
+
+#include <asm/mach-ath79/ar71xx_regs.h>
+#include <asm/mach-ath79/ath79.h>
+
+#define AG71XX_DRV_NAME "ag71xx"
+
+/*
+ * For our NAPI weight bigger does *NOT* mean better - it means more
+ * D-cache misses and lots more wasted cycles than we'll ever
+ * possibly gain from saving instructions.
+ */
+#define AG71XX_NAPI_WEIGHT 32
+#define AG71XX_OOM_REFILL (1 + HZ/10)
+
+#define AG71XX_INT_ERR (AG71XX_INT_RX_BE | AG71XX_INT_TX_BE)
+#define AG71XX_INT_TX (AG71XX_INT_TX_PS)
+#define AG71XX_INT_RX (AG71XX_INT_RX_PR | AG71XX_INT_RX_OF)
+
+#define AG71XX_INT_POLL (AG71XX_INT_RX | AG71XX_INT_TX)
+#define AG71XX_INT_INIT (AG71XX_INT_ERR | AG71XX_INT_POLL)
+
+#define AG71XX_TX_MTU_LEN 1540
+
+#define AG71XX_TX_RING_SPLIT 512
+#define AG71XX_TX_RING_DS_PER_PKT DIV_ROUND_UP(AG71XX_TX_MTU_LEN, \
+ AG71XX_TX_RING_SPLIT)
+#define AG71XX_TX_RING_SIZE_DEFAULT 128
+#define AG71XX_RX_RING_SIZE_DEFAULT 256
+
+#define AG71XX_TX_RING_SIZE_MAX 128
+#define AG71XX_RX_RING_SIZE_MAX 256
+
+#ifdef CONFIG_AG71XX_DEBUG
+#define DBG(fmt, args...) pr_debug(fmt, ## args)
+#else
+#define DBG(fmt, args...) do {} while (0)
+#endif
+
+#define ag71xx_assert(_cond) \
+do { \
+ if (_cond) \
+ break; \
+ printk("%s,%d: assertion failed\n", __FILE__, __LINE__); \
+ BUG(); \
+} while (0)
+
+struct ag71xx_desc {
+ u32 data;
+ u32 ctrl;
+#define DESC_EMPTY BIT(31)
+#define DESC_MORE BIT(24)
+#define DESC_PKTLEN_M 0xfff
+ u32 next;
+ u32 pad;
+} __attribute__((aligned(4)));
+
+#define AG71XX_DESC_SIZE roundup(sizeof(struct ag71xx_desc), \
+ L1_CACHE_BYTES)
+
+struct ag71xx_buf {
+ union {
+ struct sk_buff *skb;
+ void *rx_buf;
+ };
+ union {
+ dma_addr_t dma_addr;
+ unsigned int len;
+ };
+};
+
+struct ag71xx_ring {
+ struct ag71xx_buf *buf;
+ u8 *descs_cpu;
+ dma_addr_t descs_dma;
+ u16 desc_split;
+ u16 order;
+ unsigned int curr;
+ unsigned int dirty;
+};
+
+struct ag71xx_int_stats {
+ unsigned long rx_pr;
+ unsigned long rx_be;
+ unsigned long rx_of;
+ unsigned long tx_ps;
+ unsigned long tx_be;
+ unsigned long tx_ur;
+ unsigned long total;
+};
+
+struct ag71xx_napi_stats {
+ unsigned long napi_calls;
+ unsigned long rx_count;
+ unsigned long rx_packets;
+ unsigned long rx_packets_max;
+ unsigned long tx_count;
+ unsigned long tx_packets;
+ unsigned long tx_packets_max;
+
+ unsigned long rx[AG71XX_NAPI_WEIGHT + 1];
+ unsigned long tx[AG71XX_NAPI_WEIGHT + 1];
+};
+
+struct ag71xx_debug {
+ struct dentry *debugfs_dir;
+
+ struct ag71xx_int_stats int_stats;
+ struct ag71xx_napi_stats napi_stats;
+};
+
+struct ag71xx {
+ /*
+ * Critical data related to the per-packet data path are clustered
+ * early in this structure to help improve the D-cache footprint.
+ */
+ struct ag71xx_ring rx_ring ____cacheline_aligned;
+ struct ag71xx_ring tx_ring ____cacheline_aligned;
+
+ int mac_idx;
+
+ u16 desc_pktlen_mask;
+ u16 rx_buf_size;
+ u8 rx_buf_offset;
+ u8 tx_hang_workaround:1;
+
+ struct net_device *dev;
+ struct platform_device *pdev;
+ spinlock_t lock;
+ struct napi_struct napi;
+ u32 msg_enable;
+
+ /*
+ * From this point onwards we're not looking at per-packet fields.
+ */
+ void __iomem *mac_base;
+ void __iomem *mii_base;
+
+ struct ag71xx_desc *stop_desc;
+ dma_addr_t stop_desc_dma;
+
+ struct phy_device *phy_dev;
+ void *phy_priv;
+ int phy_if_mode;
+
+ unsigned int link;
+ unsigned int speed;
+ int duplex;
+
+ struct delayed_work restart_work;
+ struct timer_list oom_timer;
+
+ struct reset_control *mac_reset;
+ struct reset_control *mdio_reset;
+
+ u32 fifodata[3];
+ u32 plldata[3];
+ u32 pllreg[3];
+ struct regmap *pllregmap;
+
+#ifdef CONFIG_AG71XX_DEBUG_FS
+ struct ag71xx_debug debug;
+#endif
+};
+
+struct ag71xx_mdio {
+ struct reset_control *mdio_reset;
+ struct mii_bus *mii_bus;
+ struct regmap *mii_regmap;
+};
+
+extern struct ethtool_ops ag71xx_ethtool_ops;
+void ag71xx_link_adjust(struct ag71xx *ag);
+
+int ag71xx_phy_connect(struct ag71xx *ag);
+void ag71xx_phy_disconnect(struct ag71xx *ag);
+
+static inline int ag71xx_desc_empty(struct ag71xx_desc *desc)
+{
+ return (desc->ctrl & DESC_EMPTY) != 0;
+}
+
+static inline struct ag71xx_desc *
+ag71xx_ring_desc(struct ag71xx_ring *ring, int idx)
+{
+ return (struct ag71xx_desc *) &ring->descs_cpu[idx * AG71XX_DESC_SIZE];
+}
+
+static inline int
+ag71xx_ring_size_order(int size)
+{
+ return fls(size - 1);
+}
+
+/* Register offsets */
+#define AG71XX_REG_MAC_CFG1 0x0000
+#define AG71XX_REG_MAC_CFG2 0x0004
+#define AG71XX_REG_MAC_IPG 0x0008
+#define AG71XX_REG_MAC_HDX 0x000c
+#define AG71XX_REG_MAC_MFL 0x0010
+#define AG71XX_REG_MII_CFG 0x0020
+#define AG71XX_REG_MII_CMD 0x0024
+#define AG71XX_REG_MII_ADDR 0x0028
+#define AG71XX_REG_MII_CTRL 0x002c
+#define AG71XX_REG_MII_STATUS 0x0030
+#define AG71XX_REG_MII_IND 0x0034
+#define AG71XX_REG_MAC_IFCTL 0x0038
+#define AG71XX_REG_MAC_ADDR1 0x0040
+#define AG71XX_REG_MAC_ADDR2 0x0044
+#define AG71XX_REG_FIFO_CFG0 0x0048
+#define AG71XX_REG_FIFO_CFG1 0x004c
+#define AG71XX_REG_FIFO_CFG2 0x0050
+#define AG71XX_REG_FIFO_CFG3 0x0054
+#define AG71XX_REG_FIFO_CFG4 0x0058
+#define AG71XX_REG_FIFO_CFG5 0x005c
+#define AG71XX_REG_FIFO_RAM0 0x0060
+#define AG71XX_REG_FIFO_RAM1 0x0064
+#define AG71XX_REG_FIFO_RAM2 0x0068
+#define AG71XX_REG_FIFO_RAM3 0x006c
+#define AG71XX_REG_FIFO_RAM4 0x0070
+#define AG71XX_REG_FIFO_RAM5 0x0074
+#define AG71XX_REG_FIFO_RAM6 0x0078
+#define AG71XX_REG_FIFO_RAM7 0x007c
+
+#define AG71XX_REG_TX_CTRL 0x0180
+#define AG71XX_REG_TX_DESC 0x0184
+#define AG71XX_REG_TX_STATUS 0x0188
+#define AG71XX_REG_RX_CTRL 0x018c
+#define AG71XX_REG_RX_DESC 0x0190
+#define AG71XX_REG_RX_STATUS 0x0194
+#define AG71XX_REG_INT_ENABLE 0x0198
+#define AG71XX_REG_INT_STATUS 0x019c
+
+#define AG71XX_REG_FIFO_DEPTH 0x01a8
+#define AG71XX_REG_RX_SM 0x01b0
+#define AG71XX_REG_TX_SM 0x01b4
+
+#define MAC_CFG1_TXE BIT(0) /* Tx Enable */
+#define MAC_CFG1_STX BIT(1) /* Synchronize Tx Enable */
+#define MAC_CFG1_RXE BIT(2) /* Rx Enable */
+#define MAC_CFG1_SRX BIT(3) /* Synchronize Rx Enable */
+#define MAC_CFG1_TFC BIT(4) /* Tx Flow Control Enable */
+#define MAC_CFG1_RFC BIT(5) /* Rx Flow Control Enable */
+#define MAC_CFG1_LB BIT(8) /* Loopback mode */
+#define MAC_CFG1_SR BIT(31) /* Soft Reset */
+
+#define MAC_CFG2_FDX BIT(0)
+#define MAC_CFG2_CRC_EN BIT(1)
+#define MAC_CFG2_PAD_CRC_EN BIT(2)
+#define MAC_CFG2_LEN_CHECK BIT(4)
+#define MAC_CFG2_HUGE_FRAME_EN BIT(5)
+#define MAC_CFG2_IF_1000 BIT(9)
+#define MAC_CFG2_IF_10_100 BIT(8)
+
+#define FIFO_CFG0_WTM BIT(0) /* Watermark Module */
+#define FIFO_CFG0_RXS BIT(1) /* Rx System Module */
+#define FIFO_CFG0_RXF BIT(2) /* Rx Fabric Module */
+#define FIFO_CFG0_TXS BIT(3) /* Tx System Module */
+#define FIFO_CFG0_TXF BIT(4) /* Tx Fabric Module */
+#define FIFO_CFG0_ALL (FIFO_CFG0_WTM | FIFO_CFG0_RXS | FIFO_CFG0_RXF \
+ | FIFO_CFG0_TXS | FIFO_CFG0_TXF)
+
+#define FIFO_CFG0_ENABLE_SHIFT 8
+
+#define FIFO_CFG4_DE BIT(0) /* Drop Event */
+#define FIFO_CFG4_DV BIT(1) /* RX_DV Event */
+#define FIFO_CFG4_FC BIT(2) /* False Carrier */
+#define FIFO_CFG4_CE BIT(3) /* Code Error */
+#define FIFO_CFG4_CR BIT(4) /* CRC error */
+#define FIFO_CFG4_LM BIT(5) /* Length Mismatch */
+#define FIFO_CFG4_LO BIT(6) /* Length out of range */
+#define FIFO_CFG4_OK BIT(7) /* Packet is OK */
+#define FIFO_CFG4_MC BIT(8) /* Multicast Packet */
+#define FIFO_CFG4_BC BIT(9) /* Broadcast Packet */
+#define FIFO_CFG4_DR BIT(10) /* Dribble */
+#define FIFO_CFG4_LE BIT(11) /* Long Event */
+#define FIFO_CFG4_CF BIT(12) /* Control Frame */
+#define FIFO_CFG4_PF BIT(13) /* Pause Frame */
+#define FIFO_CFG4_UO BIT(14) /* Unsupported Opcode */
+#define FIFO_CFG4_VT BIT(15) /* VLAN tag detected */
+#define FIFO_CFG4_FT BIT(16) /* Frame Truncated */
+#define FIFO_CFG4_UC BIT(17) /* Unicast Packet */
+
+#define FIFO_CFG5_DE BIT(0) /* Drop Event */
+#define FIFO_CFG5_DV BIT(1) /* RX_DV Event */
+#define FIFO_CFG5_FC BIT(2) /* False Carrier */
+#define FIFO_CFG5_CE BIT(3) /* Code Error */
+#define FIFO_CFG5_LM BIT(4) /* Length Mismatch */
+#define FIFO_CFG5_LO BIT(5) /* Length Out of Range */
+#define FIFO_CFG5_OK BIT(6) /* Packet is OK */
+#define FIFO_CFG5_MC BIT(7) /* Multicast Packet */
+#define FIFO_CFG5_BC BIT(8) /* Broadcast Packet */
+#define FIFO_CFG5_DR BIT(9) /* Dribble */
+#define FIFO_CFG5_CF BIT(10) /* Control Frame */
+#define FIFO_CFG5_PF BIT(11) /* Pause Frame */
+#define FIFO_CFG5_UO BIT(12) /* Unsupported Opcode */
+#define FIFO_CFG5_VT BIT(13) /* VLAN tag detected */
+#define FIFO_CFG5_LE BIT(14) /* Long Event */
+#define FIFO_CFG5_FT BIT(15) /* Frame Truncated */
+#define FIFO_CFG5_16 BIT(16) /* unknown */
+#define FIFO_CFG5_17 BIT(17) /* unknown */
+#define FIFO_CFG5_SF BIT(18) /* Short Frame */
+#define FIFO_CFG5_BM BIT(19) /* Byte Mode */
+
+#define AG71XX_INT_TX_PS BIT(0)
+#define AG71XX_INT_TX_UR BIT(1)
+#define AG71XX_INT_TX_BE BIT(3)
+#define AG71XX_INT_RX_PR BIT(4)
+#define AG71XX_INT_RX_OF BIT(6)
+#define AG71XX_INT_RX_BE BIT(7)
+
+#define MAC_IFCTL_SPEED BIT(16)
+
+#define MII_CFG_CLK_DIV_4 0
+#define MII_CFG_CLK_DIV_6 2
+#define MII_CFG_CLK_DIV_8 3
+#define MII_CFG_CLK_DIV_10 4
+#define MII_CFG_CLK_DIV_14 5
+#define MII_CFG_CLK_DIV_20 6
+#define MII_CFG_CLK_DIV_28 7
+#define MII_CFG_CLK_DIV_34 8
+#define MII_CFG_CLK_DIV_42 9
+#define MII_CFG_CLK_DIV_50 10
+#define MII_CFG_CLK_DIV_58 11
+#define MII_CFG_CLK_DIV_66 12
+#define MII_CFG_CLK_DIV_74 13
+#define MII_CFG_CLK_DIV_82 14
+#define MII_CFG_CLK_DIV_98 15
+#define MII_CFG_RESET BIT(31)
+
+#define MII_CMD_WRITE 0x0
+#define MII_CMD_READ 0x1
+#define MII_ADDR_SHIFT 8
+#define MII_IND_BUSY BIT(0)
+#define MII_IND_INVALID BIT(2)
+
+#define TX_CTRL_TXE BIT(0) /* Tx Enable */
+
+#define TX_STATUS_PS BIT(0) /* Packet Sent */
+#define TX_STATUS_UR BIT(1) /* Tx Underrun */
+#define TX_STATUS_BE BIT(3) /* Bus Error */
+
+#define RX_CTRL_RXE BIT(0) /* Rx Enable */
+
+#define RX_STATUS_PR BIT(0) /* Packet Received */
+#define RX_STATUS_OF BIT(2) /* Rx Overflow */
+#define RX_STATUS_BE BIT(3) /* Bus Error */
+
+static inline void ag71xx_wr(struct ag71xx *ag, unsigned reg, u32 value)
+{
+ __raw_writel(value, ag->mac_base + reg);
+ /* flush write */
+ (void) __raw_readl(ag->mac_base + reg);
+}
+
+static inline u32 ag71xx_rr(struct ag71xx *ag, unsigned reg)
+{
+ return __raw_readl(ag->mac_base + reg);
+}
+
+static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask)
+{
+ void __iomem *r;
+
+ r = ag->mac_base + reg;
+ __raw_writel(__raw_readl(r) | mask, r);
+ /* flush write */
+ (void) __raw_readl(r);
+}
+
+static inline void ag71xx_cb(struct ag71xx *ag, unsigned reg, u32 mask)
+{
+ void __iomem *r;
+
+ r = ag->mac_base + reg;
+ __raw_writel(__raw_readl(r) & ~mask, r);
+ /* flush write */
+ (void) __raw_readl(r);
+}
+
+static inline void ag71xx_int_enable(struct ag71xx *ag, u32 ints)
+{
+ ag71xx_sb(ag, AG71XX_REG_INT_ENABLE, ints);
+}
+
+static inline void ag71xx_int_disable(struct ag71xx *ag, u32 ints)
+{
+ ag71xx_cb(ag, AG71XX_REG_INT_ENABLE, ints);
+}
+
+#ifdef CONFIG_AG71XX_DEBUG_FS
+int ag71xx_debugfs_root_init(void);
+void ag71xx_debugfs_root_exit(void);
+int ag71xx_debugfs_init(struct ag71xx *ag);
+void ag71xx_debugfs_exit(struct ag71xx *ag);
+void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status);
+void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx);
+#else
+static inline int ag71xx_debugfs_root_init(void) { return 0; }
+static inline void ag71xx_debugfs_root_exit(void) {}
+static inline int ag71xx_debugfs_init(struct ag71xx *ag) { return 0; }
+static inline void ag71xx_debugfs_exit(struct ag71xx *ag) {}
+static inline void ag71xx_debugfs_update_int_stats(struct ag71xx *ag,
+ u32 status) {}
+static inline void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag,
+ int rx, int tx) {}
+#endif /* CONFIG_AG71XX_DEBUG_FS */
+
+int ag71xx_ar7240_init(struct ag71xx *ag, struct device_node *np);
+void ag71xx_ar7240_cleanup(struct ag71xx *ag);
+
+int ag71xx_setup_gmac(struct device_node *np);
+
+int ar7240sw_phy_read(struct mii_bus *mii, int addr, int reg);
+int ar7240sw_phy_write(struct mii_bus *mii, int addr, int reg, u16 val);
+
+#endif /* _AG71XX_H */
--- /dev/null
+/*
+ * Atheros AR71xx built-in ethernet mac driver
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Based on Atheros' AG7100 driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/debugfs.h>
+
+#include "ag71xx.h"
+
+static struct dentry *ag71xx_debugfs_root;
+
+static int ag71xx_debugfs_generic_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status)
+{
+ if (status)
+ ag->debug.int_stats.total++;
+ if (status & AG71XX_INT_TX_PS)
+ ag->debug.int_stats.tx_ps++;
+ if (status & AG71XX_INT_TX_UR)
+ ag->debug.int_stats.tx_ur++;
+ if (status & AG71XX_INT_TX_BE)
+ ag->debug.int_stats.tx_be++;
+ if (status & AG71XX_INT_RX_PR)
+ ag->debug.int_stats.rx_pr++;
+ if (status & AG71XX_INT_RX_OF)
+ ag->debug.int_stats.rx_of++;
+ if (status & AG71XX_INT_RX_BE)
+ ag->debug.int_stats.rx_be++;
+}
+
+static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+#define PR_INT_STAT(_label, _field) \
+ len += snprintf(buf + len, sizeof(buf) - len, \
+ "%20s: %10lu\n", _label, ag->debug.int_stats._field);
+
+ struct ag71xx *ag = file->private_data;
+ char buf[256];
+ unsigned int len = 0;
+
+ PR_INT_STAT("TX Packet Sent", tx_ps);
+ PR_INT_STAT("TX Underrun", tx_ur);
+ PR_INT_STAT("TX Bus Error", tx_be);
+ PR_INT_STAT("RX Packet Received", rx_pr);
+ PR_INT_STAT("RX Overflow", rx_of);
+ PR_INT_STAT("RX Bus Error", rx_be);
+ len += snprintf(buf + len, sizeof(buf) - len, "\n");
+ PR_INT_STAT("Total", total);
+
+ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+#undef PR_INT_STAT
+}
+
+static const struct file_operations ag71xx_fops_int_stats = {
+ .open = ag71xx_debugfs_generic_open,
+ .read = read_file_int_stats,
+ .owner = THIS_MODULE
+};
+
+void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx)
+{
+ struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
+
+ if (rx) {
+ stats->rx_count++;
+ stats->rx_packets += rx;
+ if (rx <= AG71XX_NAPI_WEIGHT)
+ stats->rx[rx]++;
+ if (rx > stats->rx_packets_max)
+ stats->rx_packets_max = rx;
+ }
+
+ if (tx) {
+ stats->tx_count++;
+ stats->tx_packets += tx;
+ if (tx <= AG71XX_NAPI_WEIGHT)
+ stats->tx[tx]++;
+ if (tx > stats->tx_packets_max)
+ stats->tx_packets_max = tx;
+ }
+}
+
+static ssize_t read_file_napi_stats(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ag71xx *ag = file->private_data;
+ struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
+ char *buf;
+ unsigned int buflen;
+ unsigned int len = 0;
+ unsigned long rx_avg = 0;
+ unsigned long tx_avg = 0;
+ int ret;
+ int i;
+
+ buflen = 2048;
+ buf = kmalloc(buflen, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ if (stats->rx_count)
+ rx_avg = stats->rx_packets / stats->rx_count;
+
+ if (stats->tx_count)
+ tx_avg = stats->tx_packets / stats->tx_count;
+
+ len += snprintf(buf + len, buflen - len, "%3s %10s %10s\n",
+ "len", "rx", "tx");
+
+ for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++)
+ len += snprintf(buf + len, buflen - len,
+ "%3d: %10lu %10lu\n",
+ i, stats->rx[i], stats->tx[i]);
+
+ len += snprintf(buf + len, buflen - len, "\n");
+
+ len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
+ "sum", stats->rx_count, stats->tx_count);
+ len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
+ "avg", rx_avg, tx_avg);
+ len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
+ "max", stats->rx_packets_max, stats->tx_packets_max);
+ len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
+ "pkt", stats->rx_packets, stats->tx_packets);
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+ kfree(buf);
+
+ return ret;
+}
+
+static const struct file_operations ag71xx_fops_napi_stats = {
+ .open = ag71xx_debugfs_generic_open,
+ .read = read_file_napi_stats,
+ .owner = THIS_MODULE
+};
+
+#define DESC_PRINT_LEN 64
+
+static ssize_t read_file_ring(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos,
+ struct ag71xx *ag,
+ struct ag71xx_ring *ring,
+ unsigned desc_reg)
+{
+ int ring_size = BIT(ring->order);
+ int ring_mask = ring_size - 1;
+ char *buf;
+ unsigned int buflen;
+ unsigned int len = 0;
+ unsigned long flags;
+ ssize_t ret;
+ int curr;
+ int dirty;
+ u32 desc_hw;
+ int i;
+
+ buflen = (ring_size * DESC_PRINT_LEN);
+ buf = kmalloc(buflen, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ len += snprintf(buf + len, buflen - len,
+ "Idx ... %-8s %-8s %-8s %-8s .\n",
+ "desc", "next", "data", "ctrl");
+
+ spin_lock_irqsave(&ag->lock, flags);
+
+ curr = (ring->curr & ring_mask);
+ dirty = (ring->dirty & ring_mask);
+ desc_hw = ag71xx_rr(ag, desc_reg);
+ for (i = 0; i < ring_size; i++) {
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+ u32 desc_dma = ((u32) ring->descs_dma) + i * AG71XX_DESC_SIZE;
+
+ len += snprintf(buf + len, buflen - len,
+ "%3d %c%c%c %08x %08x %08x %08x %c\n",
+ i,
+ (i == curr) ? 'C' : ' ',
+ (i == dirty) ? 'D' : ' ',
+ (desc_hw == desc_dma) ? 'H' : ' ',
+ desc_dma,
+ desc->next,
+ desc->data,
+ desc->ctrl,
+ (desc->ctrl & DESC_EMPTY) ? 'E' : '*');
+ }
+
+ spin_unlock_irqrestore(&ag->lock, flags);
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+ kfree(buf);
+
+ return ret;
+}
+
+static ssize_t read_file_tx_ring(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ag71xx *ag = file->private_data;
+
+ return read_file_ring(file, user_buf, count, ppos, ag, &ag->tx_ring,
+ AG71XX_REG_TX_DESC);
+}
+
+static const struct file_operations ag71xx_fops_tx_ring = {
+ .open = ag71xx_debugfs_generic_open,
+ .read = read_file_tx_ring,
+ .owner = THIS_MODULE
+};
+
+static ssize_t read_file_rx_ring(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ag71xx *ag = file->private_data;
+
+ return read_file_ring(file, user_buf, count, ppos, ag, &ag->rx_ring,
+ AG71XX_REG_RX_DESC);
+}
+
+static const struct file_operations ag71xx_fops_rx_ring = {
+ .open = ag71xx_debugfs_generic_open,
+ .read = read_file_rx_ring,
+ .owner = THIS_MODULE
+};
+
+void ag71xx_debugfs_exit(struct ag71xx *ag)
+{
+ debugfs_remove_recursive(ag->debug.debugfs_dir);
+}
+
+int ag71xx_debugfs_init(struct ag71xx *ag)
+{
+ struct device *dev = &ag->pdev->dev;
+
+ ag->debug.debugfs_dir = debugfs_create_dir(dev_name(dev),
+ ag71xx_debugfs_root);
+ if (!ag->debug.debugfs_dir) {
+ dev_err(dev, "unable to create debugfs directory\n");
+ return -ENOENT;
+ }
+
+ debugfs_create_file("int_stats", S_IRUGO, ag->debug.debugfs_dir,
+ ag, &ag71xx_fops_int_stats);
+ debugfs_create_file("napi_stats", S_IRUGO, ag->debug.debugfs_dir,
+ ag, &ag71xx_fops_napi_stats);
+ debugfs_create_file("tx_ring", S_IRUGO, ag->debug.debugfs_dir,
+ ag, &ag71xx_fops_tx_ring);
+ debugfs_create_file("rx_ring", S_IRUGO, ag->debug.debugfs_dir,
+ ag, &ag71xx_fops_rx_ring);
+
+ return 0;
+}
+
+int ag71xx_debugfs_root_init(void)
+{
+ if (ag71xx_debugfs_root)
+ return -EBUSY;
+
+ ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
+ if (!ag71xx_debugfs_root)
+ return -ENOENT;
+
+ return 0;
+}
+
+void ag71xx_debugfs_root_exit(void)
+{
+ debugfs_remove(ag71xx_debugfs_root);
+ ag71xx_debugfs_root = NULL;
+}
--- /dev/null
+/*
+ * Atheros AR71xx built-in ethernet mac driver
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Based on Atheros' AG7100 driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include "ag71xx.h"
+
+static u32 ag71xx_ethtool_get_msglevel(struct net_device *dev)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+
+ return ag->msg_enable;
+}
+
+static void ag71xx_ethtool_set_msglevel(struct net_device *dev, u32 msg_level)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+
+ ag->msg_enable = msg_level;
+}
+
+static void ag71xx_ethtool_get_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *er)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+
+ er->tx_max_pending = AG71XX_TX_RING_SIZE_MAX;
+ er->rx_max_pending = AG71XX_RX_RING_SIZE_MAX;
+ er->rx_mini_max_pending = 0;
+ er->rx_jumbo_max_pending = 0;
+
+ er->tx_pending = BIT(ag->tx_ring.order);
+ er->rx_pending = BIT(ag->rx_ring.order);
+ er->rx_mini_pending = 0;
+ er->rx_jumbo_pending = 0;
+
+ if (ag->tx_ring.desc_split)
+ er->tx_pending /= AG71XX_TX_RING_DS_PER_PKT;
+}
+
+static int ag71xx_ethtool_set_ringparam(struct net_device *dev,
+ struct ethtool_ringparam *er)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+ unsigned tx_size;
+ unsigned rx_size;
+ int err = 0;
+
+ if (er->rx_mini_pending != 0||
+ er->rx_jumbo_pending != 0 ||
+ er->rx_pending == 0 ||
+ er->tx_pending == 0)
+ return -EINVAL;
+
+ tx_size = er->tx_pending < AG71XX_TX_RING_SIZE_MAX ?
+ er->tx_pending : AG71XX_TX_RING_SIZE_MAX;
+
+ rx_size = er->rx_pending < AG71XX_RX_RING_SIZE_MAX ?
+ er->rx_pending : AG71XX_RX_RING_SIZE_MAX;
+
+ if (netif_running(dev)) {
+ err = dev->netdev_ops->ndo_stop(dev);
+ if (err)
+ return err;
+ }
+
+ if (ag->tx_ring.desc_split)
+ tx_size *= AG71XX_TX_RING_DS_PER_PKT;
+
+ ag->tx_ring.order = ag71xx_ring_size_order(tx_size);
+ ag->rx_ring.order = ag71xx_ring_size_order(rx_size);
+
+ if (netif_running(dev))
+ err = dev->netdev_ops->ndo_open(dev);
+
+ return err;
+}
+
+static int ag71xx_ethtool_nway_reset(struct net_device *dev)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+ struct phy_device *phydev = ag->phy_dev;
+
+ if (!phydev)
+ return -ENODEV;
+
+ return genphy_restart_aneg(phydev);
+}
+
+struct ethtool_ops ag71xx_ethtool_ops = {
+ .get_msglevel = ag71xx_ethtool_get_msglevel,
+ .set_msglevel = ag71xx_ethtool_set_msglevel,
+ .get_ringparam = ag71xx_ethtool_get_ringparam,
+ .set_ringparam = ag71xx_ethtool_set_ringparam,
+ .get_link_ksettings = phy_ethtool_get_link_ksettings,
+ .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .get_link = ethtool_op_get_link,
+ .get_ts_info = ethtool_op_get_ts_info,
+ .nway_reset = ag71xx_ethtool_nway_reset,
+};
--- /dev/null
+/*
+ * Atheros AR71xx built-in ethernet mac driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/sizes.h>
+#include <linux/of_address.h>
+#include "ag71xx.h"
+
+static void ag71xx_of_set(struct device_node *np, const char *prop,
+ u32 *reg, u32 shift, u32 mask)
+{
+ u32 val;
+
+ if (of_property_read_u32(np, prop, &val))
+ return;
+
+ *reg &= ~(mask << shift);
+ *reg |= ((val & mask) << shift);
+}
+
+static void ag71xx_of_bit(struct device_node *np, const char *prop,
+ u32 *reg, u32 mask)
+{
+ u32 val;
+
+ if (of_property_read_u32(np, prop, &val))
+ return;
+
+ if (val)
+ *reg |= mask;
+ else
+ *reg &= ~mask;
+}
+
+static void ag71xx_setup_gmac_933x(struct device_node *np, void __iomem *base)
+{
+ u32 val = __raw_readl(base + AR933X_GMAC_REG_ETH_CFG);
+
+ ag71xx_of_bit(np, "switch-phy-swap", &val, AR933X_ETH_CFG_SW_PHY_SWAP);
+ ag71xx_of_bit(np, "switch-phy-addr-swap", &val,
+ AR933X_ETH_CFG_SW_PHY_ADDR_SWAP);
+
+ __raw_writel(val, base + AR933X_GMAC_REG_ETH_CFG);
+}
+
+static void ag71xx_setup_gmac_934x(struct device_node *np, void __iomem *base)
+{
+ u32 val = __raw_readl(base + AR934X_GMAC_REG_ETH_CFG);
+
+ ag71xx_of_bit(np, "rgmii-gmac0", &val, AR934X_ETH_CFG_RGMII_GMAC0);
+ ag71xx_of_bit(np, "mii-gmac0", &val, AR934X_ETH_CFG_MII_GMAC0);
+ ag71xx_of_bit(np, "mii-gmac0-slave", &val, AR934X_ETH_CFG_MII_GMAC0_SLAVE);
+ ag71xx_of_bit(np, "gmii-gmac0", &val, AR934X_ETH_CFG_GMII_GMAC0);
+ ag71xx_of_bit(np, "switch-phy-swap", &val, AR934X_ETH_CFG_SW_PHY_SWAP);
+ ag71xx_of_bit(np, "switch-only-mode", &val,
+ AR934X_ETH_CFG_SW_ONLY_MODE);
+ ag71xx_of_set(np, "rxdv-delay", &val,
+ AR934X_ETH_CFG_RDV_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "rxd-delay", &val,
+ AR934X_ETH_CFG_RXD_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "txd-delay", &val,
+ AR934X_ETH_CFG_TXD_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "txen-delay", &val,
+ AR934X_ETH_CFG_TXE_DELAY_SHIFT, 0x3);
+
+ __raw_writel(val, base + AR934X_GMAC_REG_ETH_CFG);
+}
+
+static void ag71xx_setup_gmac_955x(struct device_node *np, void __iomem *base)
+{
+ u32 val = __raw_readl(base + QCA955X_GMAC_REG_ETH_CFG);
+
+ ag71xx_of_bit(np, "rgmii-enabled", &val, QCA955X_ETH_CFG_RGMII_EN);
+ ag71xx_of_bit(np, "ge0-sgmii", &val, QCA955X_ETH_CFG_GE0_SGMII);
+ ag71xx_of_set(np, "txen-delay", &val, QCA955X_ETH_CFG_TXE_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "txd-delay", &val, QCA955X_ETH_CFG_TXD_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "rxdv-delay", &val, QCA955X_ETH_CFG_RDV_DELAY_SHIFT, 0x3);
+ ag71xx_of_set(np, "rxd-delay", &val, QCA955X_ETH_CFG_RXD_DELAY_SHIFT, 0x3);
+
+ __raw_writel(val, base + QCA955X_GMAC_REG_ETH_CFG);
+}
+
+static void ag71xx_setup_gmac_956x(struct device_node *np, void __iomem *base)
+{
+ u32 val = __raw_readl(base + QCA956X_GMAC_REG_ETH_CFG);
+
+ ag71xx_of_bit(np, "switch-phy-swap", &val, QCA956X_ETH_CFG_SW_PHY_SWAP);
+ ag71xx_of_bit(np, "switch-phy-addr-swap", &val,
+ QCA956X_ETH_CFG_SW_PHY_ADDR_SWAP);
+
+ __raw_writel(val, base + QCA956X_GMAC_REG_ETH_CFG);
+}
+
+int ag71xx_setup_gmac(struct device_node *np)
+{
+ struct device_node *np_dev;
+ void __iomem *base;
+ int err = 0;
+
+ np = of_get_child_by_name(np, "gmac-config");
+ if (!np)
+ return 0;
+
+ np_dev = of_parse_phandle(np, "device", 0);
+ if (!np_dev)
+ goto out;
+
+ base = of_iomap(np_dev, 0);
+ if (!base) {
+ pr_err("%pOF: can't map GMAC registers\n", np_dev);
+ err = -ENOMEM;
+ goto err_iomap;
+ }
+
+ if (of_device_is_compatible(np_dev, "qca,ar9330-gmac"))
+ ag71xx_setup_gmac_933x(np, base);
+ else if (of_device_is_compatible(np_dev, "qca,ar9340-gmac"))
+ ag71xx_setup_gmac_934x(np, base);
+ else if (of_device_is_compatible(np_dev, "qca,qca9550-gmac"))
+ ag71xx_setup_gmac_955x(np, base);
+ else if (of_device_is_compatible(np_dev, "qca,qca9560-gmac"))
+ ag71xx_setup_gmac_956x(np, base);
+
+ iounmap(base);
+
+err_iomap:
+ of_node_put(np_dev);
+out:
+ of_node_put(np);
+ return err;
+}
--- /dev/null
+/*
+ * Atheros AR71xx built-in ethernet mac driver
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Based on Atheros' AG7100 driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/sizes.h>
+#include <linux/of_net.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include "ag71xx.h"
+
+#define AG71XX_DEFAULT_MSG_ENABLE \
+ (NETIF_MSG_DRV \
+ | NETIF_MSG_PROBE \
+ | NETIF_MSG_LINK \
+ | NETIF_MSG_TIMER \
+ | NETIF_MSG_IFDOWN \
+ | NETIF_MSG_IFUP \
+ | NETIF_MSG_RX_ERR \
+ | NETIF_MSG_TX_ERR)
+
+static int ag71xx_msg_level = -1;
+
+module_param_named(msg_level, ag71xx_msg_level, int, 0);
+MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)");
+
+#define ETH_SWITCH_HEADER_LEN 2
+
+static int ag71xx_tx_packets(struct ag71xx *ag, bool flush);
+
+static inline unsigned int ag71xx_max_frame_len(unsigned int mtu)
+{
+ return ETH_SWITCH_HEADER_LEN + ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN;
+}
+
+static void ag71xx_dump_dma_regs(struct ag71xx *ag)
+{
+ DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n",
+ ag->dev->name,
+ ag71xx_rr(ag, AG71XX_REG_TX_CTRL),
+ ag71xx_rr(ag, AG71XX_REG_TX_DESC),
+ ag71xx_rr(ag, AG71XX_REG_TX_STATUS));
+
+ DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n",
+ ag->dev->name,
+ ag71xx_rr(ag, AG71XX_REG_RX_CTRL),
+ ag71xx_rr(ag, AG71XX_REG_RX_DESC),
+ ag71xx_rr(ag, AG71XX_REG_RX_STATUS));
+}
+
+static void ag71xx_dump_regs(struct ag71xx *ag)
+{
+ DBG("%s: mac_cfg1=%08x, mac_cfg2=%08x, ipg=%08x, hdx=%08x, mfl=%08x\n",
+ ag->dev->name,
+ ag71xx_rr(ag, AG71XX_REG_MAC_CFG1),
+ ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
+ ag71xx_rr(ag, AG71XX_REG_MAC_IPG),
+ ag71xx_rr(ag, AG71XX_REG_MAC_HDX),
+ ag71xx_rr(ag, AG71XX_REG_MAC_MFL));
+ DBG("%s: mac_ifctl=%08x, mac_addr1=%08x, mac_addr2=%08x\n",
+ ag->dev->name,
+ ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
+ ag71xx_rr(ag, AG71XX_REG_MAC_ADDR1),
+ ag71xx_rr(ag, AG71XX_REG_MAC_ADDR2));
+ DBG("%s: fifo_cfg0=%08x, fifo_cfg1=%08x, fifo_cfg2=%08x\n",
+ ag->dev->name,
+ ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
+ ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
+ ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
+ DBG("%s: fifo_cfg3=%08x, fifo_cfg4=%08x, fifo_cfg5=%08x\n",
+ ag->dev->name,
+ ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
+ ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
+ ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
+}
+
+static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr)
+{
+ DBG("%s: %s intr=%08x %s%s%s%s%s%s\n",
+ ag->dev->name, label, intr,
+ (intr & AG71XX_INT_TX_PS) ? "TXPS " : "",
+ (intr & AG71XX_INT_TX_UR) ? "TXUR " : "",
+ (intr & AG71XX_INT_TX_BE) ? "TXBE " : "",
+ (intr & AG71XX_INT_RX_PR) ? "RXPR " : "",
+ (intr & AG71XX_INT_RX_OF) ? "RXOF " : "",
+ (intr & AG71XX_INT_RX_BE) ? "RXBE " : "");
+}
+
+static void ag71xx_ring_tx_clean(struct ag71xx *ag)
+{
+ struct ag71xx_ring *ring = &ag->tx_ring;
+ struct net_device *dev = ag->dev;
+ int ring_mask = BIT(ring->order) - 1;
+ u32 bytes_compl = 0, pkts_compl = 0;
+
+ while (ring->curr != ring->dirty) {
+ struct ag71xx_desc *desc;
+ u32 i = ring->dirty & ring_mask;
+
+ desc = ag71xx_ring_desc(ring, i);
+ if (!ag71xx_desc_empty(desc)) {
+ desc->ctrl = 0;
+ dev->stats.tx_errors++;
+ }
+
+ if (ring->buf[i].skb) {
+ bytes_compl += ring->buf[i].len;
+ pkts_compl++;
+ dev_kfree_skb_any(ring->buf[i].skb);
+ }
+ ring->buf[i].skb = NULL;
+ ring->dirty++;
+ }
+
+ /* flush descriptors */
+ wmb();
+
+ netdev_completed_queue(dev, pkts_compl, bytes_compl);
+}
+
+static void ag71xx_ring_tx_init(struct ag71xx *ag)
+{
+ struct ag71xx_ring *ring = &ag->tx_ring;
+ int ring_size = BIT(ring->order);
+ int ring_mask = BIT(ring->order) - 1;
+ int i;
+
+ for (i = 0; i < ring_size; i++) {
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+
+ desc->next = (u32) (ring->descs_dma +
+ AG71XX_DESC_SIZE * ((i + 1) & ring_mask));
+
+ desc->ctrl = DESC_EMPTY;
+ ring->buf[i].skb = NULL;
+ }
+
+ /* flush descriptors */
+ wmb();
+
+ ring->curr = 0;
+ ring->dirty = 0;
+ netdev_reset_queue(ag->dev);
+}
+
+static void ag71xx_ring_rx_clean(struct ag71xx *ag)
+{
+ struct ag71xx_ring *ring = &ag->rx_ring;
+ int ring_size = BIT(ring->order);
+ int i;
+
+ if (!ring->buf)
+ return;
+
+ for (i = 0; i < ring_size; i++)
+ if (ring->buf[i].rx_buf) {
+ dma_unmap_single(&ag->pdev->dev, ring->buf[i].dma_addr,
+ ag->rx_buf_size, DMA_FROM_DEVICE);
+ skb_free_frag(ring->buf[i].rx_buf);
+ }
+}
+
+static int ag71xx_buffer_size(struct ag71xx *ag)
+{
+ return ag->rx_buf_size +
+ SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
+}
+
+static bool ag71xx_fill_rx_buf(struct ag71xx *ag, struct ag71xx_buf *buf,
+ int offset,
+ void *(*alloc)(unsigned int size))
+{
+ struct ag71xx_ring *ring = &ag->rx_ring;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, buf - &ring->buf[0]);
+ void *data;
+
+ data = alloc(ag71xx_buffer_size(ag));
+ if (!data)
+ return false;
+
+ buf->rx_buf = data;
+ buf->dma_addr = dma_map_single(&ag->pdev->dev, data, ag->rx_buf_size,
+ DMA_FROM_DEVICE);
+ desc->data = (u32) buf->dma_addr + offset;
+ return true;
+}
+
+static int ag71xx_ring_rx_init(struct ag71xx *ag)
+{
+ struct ag71xx_ring *ring = &ag->rx_ring;
+ int ring_size = BIT(ring->order);
+ int ring_mask = BIT(ring->order) - 1;
+ unsigned int i;
+ int ret;
+
+ ret = 0;
+ for (i = 0; i < ring_size; i++) {
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+
+ desc->next = (u32) (ring->descs_dma +
+ AG71XX_DESC_SIZE * ((i + 1) & ring_mask));
+
+ DBG("ag71xx: RX desc at %p, next is %08x\n",
+ desc, desc->next);
+ }
+
+ for (i = 0; i < ring_size; i++) {
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+
+ if (!ag71xx_fill_rx_buf(ag, &ring->buf[i], ag->rx_buf_offset,
+ netdev_alloc_frag)) {
+ ret = -ENOMEM;
+ break;
+ }
+
+ desc->ctrl = DESC_EMPTY;
+ }
+
+ /* flush descriptors */
+ wmb();
+
+ ring->curr = 0;
+ ring->dirty = 0;
+
+ return ret;
+}
+
+static int ag71xx_ring_rx_refill(struct ag71xx *ag)
+{
+ struct ag71xx_ring *ring = &ag->rx_ring;
+ int ring_mask = BIT(ring->order) - 1;
+ unsigned int count;
+ int offset = ag->rx_buf_offset;
+
+ count = 0;
+ for (; ring->curr - ring->dirty > 0; ring->dirty++) {
+ struct ag71xx_desc *desc;
+ unsigned int i;
+
+ i = ring->dirty & ring_mask;
+ desc = ag71xx_ring_desc(ring, i);
+
+ if (!ring->buf[i].rx_buf &&
+ !ag71xx_fill_rx_buf(ag, &ring->buf[i], offset,
+ napi_alloc_frag))
+ break;
+
+ desc->ctrl = DESC_EMPTY;
+ count++;
+ }
+
+ /* flush descriptors */
+ wmb();
+
+ DBG("%s: %u rx descriptors refilled\n", ag->dev->name, count);
+
+ return count;
+}
+
+static int ag71xx_rings_init(struct ag71xx *ag)
+{
+ struct ag71xx_ring *tx = &ag->tx_ring;
+ struct ag71xx_ring *rx = &ag->rx_ring;
+ int ring_size = BIT(tx->order) + BIT(rx->order);
+ int tx_size = BIT(tx->order);
+
+ tx->buf = kzalloc(ring_size * sizeof(*tx->buf), GFP_KERNEL);
+ if (!tx->buf)
+ return -ENOMEM;
+
+ tx->descs_cpu = dma_alloc_coherent(&ag->pdev->dev, ring_size * AG71XX_DESC_SIZE,
+ &tx->descs_dma, GFP_KERNEL);
+ if (!tx->descs_cpu) {
+ kfree(tx->buf);
+ tx->buf = NULL;
+ return -ENOMEM;
+ }
+
+ rx->buf = &tx->buf[tx_size];
+ rx->descs_cpu = ((void *)tx->descs_cpu) + tx_size * AG71XX_DESC_SIZE;
+ rx->descs_dma = tx->descs_dma + tx_size * AG71XX_DESC_SIZE;
+
+ ag71xx_ring_tx_init(ag);
+ return ag71xx_ring_rx_init(ag);
+}
+
+static void ag71xx_rings_free(struct ag71xx *ag)
+{
+ struct ag71xx_ring *tx = &ag->tx_ring;
+ struct ag71xx_ring *rx = &ag->rx_ring;
+ int ring_size = BIT(tx->order) + BIT(rx->order);
+
+ if (tx->descs_cpu)
+ dma_free_coherent(&ag->pdev->dev, ring_size * AG71XX_DESC_SIZE,
+ tx->descs_cpu, tx->descs_dma);
+
+ kfree(tx->buf);
+
+ tx->descs_cpu = NULL;
+ rx->descs_cpu = NULL;
+ tx->buf = NULL;
+ rx->buf = NULL;
+}
+
+static void ag71xx_rings_cleanup(struct ag71xx *ag)
+{
+ ag71xx_ring_rx_clean(ag);
+ ag71xx_ring_tx_clean(ag);
+ ag71xx_rings_free(ag);
+
+ netdev_reset_queue(ag->dev);
+}
+
+static unsigned char *ag71xx_speed_str(struct ag71xx *ag)
+{
+ switch (ag->speed) {
+ case SPEED_1000:
+ return "1000";
+ case SPEED_100:
+ return "100";
+ case SPEED_10:
+ return "10";
+ }
+
+ return "?";
+}
+
+static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
+{
+ u32 t;
+
+ t = (((u32) mac[5]) << 24) | (((u32) mac[4]) << 16)
+ | (((u32) mac[3]) << 8) | ((u32) mac[2]);
+
+ ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t);
+
+ t = (((u32) mac[1]) << 24) | (((u32) mac[0]) << 16);
+ ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t);
+}
+
+static void ag71xx_dma_reset(struct ag71xx *ag)
+{
+ u32 val;
+ int i;
+
+ ag71xx_dump_dma_regs(ag);
+
+ /* stop RX and TX */
+ ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
+ ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
+
+ /*
+ * give the hardware some time to really stop all rx/tx activity
+ * clearing the descriptors too early causes random memory corruption
+ */
+ mdelay(1);
+
+ /* clear descriptor addresses */
+ ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->stop_desc_dma);
+ ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->stop_desc_dma);
+
+ /* clear pending RX/TX interrupts */
+ for (i = 0; i < 256; i++) {
+ ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
+ ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
+ }
+
+ /* clear pending errors */
+ ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF);
+ ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR);
+
+ val = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
+ if (val)
+ pr_alert("%s: unable to clear DMA Rx status: %08x\n",
+ ag->dev->name, val);
+
+ val = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
+
+ /* mask out reserved bits */
+ val &= ~0xff000000;
+
+ if (val)
+ pr_alert("%s: unable to clear DMA Tx status: %08x\n",
+ ag->dev->name, val);
+
+ ag71xx_dump_dma_regs(ag);
+}
+
+#define MAC_CFG1_INIT (MAC_CFG1_RXE | MAC_CFG1_TXE | \
+ MAC_CFG1_SRX | MAC_CFG1_STX)
+
+#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
+
+#define FIFO_CFG4_INIT (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \
+ FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \
+ FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \
+ FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \
+ FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \
+ FIFO_CFG4_VT)
+
+#define FIFO_CFG5_INIT (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \
+ FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \
+ FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \
+ FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \
+ FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \
+ FIFO_CFG5_17 | FIFO_CFG5_SF)
+
+static void ag71xx_hw_stop(struct ag71xx *ag)
+{
+ /* disable all interrupts and stop the rx/tx engine */
+ ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);
+ ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
+ ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
+}
+
+static void ag71xx_hw_setup(struct ag71xx *ag)
+{
+ struct device_node *np = ag->pdev->dev.of_node;
+ u32 init = MAC_CFG1_INIT;
+
+ /* setup MAC configuration registers */
+ if (of_property_read_bool(np, "flow-control"))
+ init |= MAC_CFG1_TFC | MAC_CFG1_RFC;
+ ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, init);
+
+ ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
+ MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
+
+ /* setup max frame length to zero */
+ ag71xx_wr(ag, AG71XX_REG_MAC_MFL, 0);
+
+ /* setup FIFO configuration registers */
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, ag->fifodata[0]);
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, ag->fifodata[1]);
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
+}
+
+static void ag71xx_hw_init(struct ag71xx *ag)
+{
+ ag71xx_hw_stop(ag);
+
+ ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR);
+ udelay(20);
+
+ reset_control_assert(ag->mac_reset);
+ if (ag->mdio_reset)
+ reset_control_assert(ag->mdio_reset);
+ msleep(100);
+ reset_control_deassert(ag->mac_reset);
+ if (ag->mdio_reset)
+ reset_control_deassert(ag->mdio_reset);
+ msleep(200);
+
+ ag71xx_hw_setup(ag);
+
+ ag71xx_dma_reset(ag);
+}
+
+static void ag71xx_fast_reset(struct ag71xx *ag)
+{
+ struct net_device *dev = ag->dev;
+ u32 rx_ds;
+ u32 mii_reg;
+
+ ag71xx_hw_stop(ag);
+ wmb();
+
+ mii_reg = ag71xx_rr(ag, AG71XX_REG_MII_CFG);
+ rx_ds = ag71xx_rr(ag, AG71XX_REG_RX_DESC);
+
+ ag71xx_tx_packets(ag, true);
+
+ reset_control_assert(ag->mac_reset);
+ udelay(10);
+ reset_control_deassert(ag->mac_reset);
+ udelay(10);
+
+ ag71xx_dma_reset(ag);
+ ag71xx_hw_setup(ag);
+ ag->tx_ring.curr = 0;
+ ag->tx_ring.dirty = 0;
+ netdev_reset_queue(ag->dev);
+
+ /* setup max frame length */
+ ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
+ ag71xx_max_frame_len(ag->dev->mtu));
+
+ ag71xx_wr(ag, AG71XX_REG_RX_DESC, rx_ds);
+ ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
+ ag71xx_wr(ag, AG71XX_REG_MII_CFG, mii_reg);
+
+ ag71xx_hw_set_macaddr(ag, dev->dev_addr);
+}
+
+static void ag71xx_hw_start(struct ag71xx *ag)
+{
+ /* start RX engine */
+ ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
+
+ /* enable interrupts */
+ ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT);
+
+ netif_wake_queue(ag->dev);
+}
+
+static void ath79_set_pllval(struct ag71xx *ag)
+{
+ u32 pll_reg = ag->pllreg[1];
+ u32 pll_val;
+
+ if (!ag->pllregmap)
+ return;
+
+ switch (ag->speed) {
+ case SPEED_10:
+ pll_val = ag->plldata[2];
+ break;
+ case SPEED_100:
+ pll_val = ag->plldata[1];
+ break;
+ case SPEED_1000:
+ pll_val = ag->plldata[0];
+ break;
+ default:
+ BUG();
+ }
+
+ if (pll_val)
+ regmap_write(ag->pllregmap, pll_reg, pll_val);
+}
+
+static void ath79_set_pll(struct ag71xx *ag)
+{
+ u32 pll_cfg = ag->pllreg[0];
+ u32 pll_shift = ag->pllreg[2];
+
+ if (!ag->pllregmap)
+ return;
+
+ regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 2 << pll_shift);
+ udelay(100);
+
+ ath79_set_pllval(ag);
+
+ regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 3 << pll_shift);
+ udelay(100);
+
+ regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 0);
+ udelay(100);
+}
+
+static void ag71xx_bit_set(void __iomem *reg, u32 bit)
+{
+ u32 val;
+
+ val = __raw_readl(reg) | bit;
+ __raw_writel(val, reg);
+ __raw_readl(reg);
+}
+
+static void ag71xx_bit_clear(void __iomem *reg, u32 bit)
+{
+ u32 val;
+
+ val = __raw_readl(reg) & ~bit;
+ __raw_writel(val, reg);
+ __raw_readl(reg);
+}
+
+static void ag71xx_sgmii_init_qca955x(struct device_node *np)
+{
+ struct device_node *np_dev;
+ void __iomem *gmac_base;
+ u32 mr_an_status;
+ u32 sgmii_status;
+ u8 tries = 0;
+ int err = 0;
+
+ np = of_get_child_by_name(np, "gmac-config");
+ if (!np)
+ return;
+
+ np_dev = of_parse_phandle(np, "device", 0);
+ if (!np_dev)
+ goto out;
+
+ gmac_base = of_iomap(np_dev, 0);
+ if (!gmac_base) {
+ pr_err("%pOF: can't map GMAC registers\n", np_dev);
+ err = -ENOMEM;
+ goto err_iomap;
+ }
+
+ mr_an_status = __raw_readl(gmac_base + QCA955X_GMAC_REG_MR_AN_STATUS);
+ if (!(mr_an_status & QCA955X_MR_AN_STATUS_AN_ABILITY))
+ goto sgmii_out;
+
+ /* SGMII reset sequence */
+ __raw_writel(QCA955X_SGMII_RESET_RX_CLK_N_RESET,
+ gmac_base + QCA955X_GMAC_REG_SGMII_RESET);
+ __raw_readl(gmac_base + QCA955X_GMAC_REG_SGMII_RESET);
+ udelay(10);
+
+ ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
+ QCA955X_SGMII_RESET_HW_RX_125M_N);
+ udelay(10);
+
+ ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
+ QCA955X_SGMII_RESET_RX_125M_N);
+ udelay(10);
+
+ ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
+ QCA955X_SGMII_RESET_TX_125M_N);
+ udelay(10);
+
+ ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
+ QCA955X_SGMII_RESET_RX_CLK_N);
+ udelay(10);
+
+ ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET,
+ QCA955X_SGMII_RESET_TX_CLK_N);
+ udelay(10);
+
+ /*
+ * The following is what QCA has to say about what happens here:
+ *
+ * Across resets SGMII link status goes to weird state.
+ * If SGMII_DEBUG register reads other than 0x1f or 0x10,
+ * we are for sure in a bad state.
+ *
+ * Issue a PHY reset in MR_AN_CONTROL to keep going.
+ */
+ do {
+ ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_MR_AN_CONTROL,
+ QCA955X_MR_AN_CONTROL_PHY_RESET |
+ QCA955X_MR_AN_CONTROL_AN_ENABLE);
+ udelay(200);
+ ag71xx_bit_clear(gmac_base + QCA955X_GMAC_REG_MR_AN_CONTROL,
+ QCA955X_MR_AN_CONTROL_PHY_RESET);
+ mdelay(300);
+ sgmii_status = __raw_readl(gmac_base + QCA955X_GMAC_REG_SGMII_DEBUG) &
+ QCA955X_SGMII_DEBUG_TX_STATE_MASK;
+
+ if (tries++ >= 20) {
+ pr_err("ag71xx: max retries for SGMII fixup exceeded\n");
+ break;
+ }
+ } while (!(sgmii_status == 0xf || sgmii_status == 0x10));
+
+sgmii_out:
+ iounmap(gmac_base);
+err_iomap:
+ of_node_put(np_dev);
+out:
+ of_node_put(np);
+}
+
+static void ath79_mii_ctrl_set_if(struct ag71xx *ag, unsigned int mii_if)
+{
+ u32 t;
+
+ t = __raw_readl(ag->mii_base);
+ t &= ~(AR71XX_MII_CTRL_IF_MASK);
+ t |= (mii_if & AR71XX_MII_CTRL_IF_MASK);
+ __raw_writel(t, ag->mii_base);
+}
+
+static void ath79_mii0_ctrl_set_if(struct ag71xx *ag)
+{
+ unsigned int mii_if;
+
+ switch (ag->phy_if_mode) {
+ case PHY_INTERFACE_MODE_MII:
+ mii_if = AR71XX_MII0_CTRL_IF_MII;
+ break;
+ case PHY_INTERFACE_MODE_GMII:
+ mii_if = AR71XX_MII0_CTRL_IF_GMII;
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ mii_if = AR71XX_MII0_CTRL_IF_RGMII;
+ break;
+ case PHY_INTERFACE_MODE_RMII:
+ mii_if = AR71XX_MII0_CTRL_IF_RMII;
+ break;
+ default:
+ WARN(1, "Impossible PHY mode defined.\n");
+ return;
+ }
+
+ ath79_mii_ctrl_set_if(ag, mii_if);
+}
+
+static void ath79_mii1_ctrl_set_if(struct ag71xx *ag)
+{
+ unsigned int mii_if;
+
+ switch (ag->phy_if_mode) {
+ case PHY_INTERFACE_MODE_RMII:
+ mii_if = AR71XX_MII1_CTRL_IF_RMII;
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ mii_if = AR71XX_MII1_CTRL_IF_RGMII;
+ break;
+ default:
+ WARN(1, "Impossible PHY mode defined.\n");
+ return;
+ }
+
+ ath79_mii_ctrl_set_if(ag, mii_if);
+}
+
+static void ath79_mii_ctrl_set_speed(struct ag71xx *ag)
+{
+ unsigned int mii_speed;
+ u32 t;
+
+ if (!ag->mii_base)
+ return;
+
+ switch (ag->speed) {
+ case SPEED_10:
+ mii_speed = AR71XX_MII_CTRL_SPEED_10;
+ break;
+ case SPEED_100:
+ mii_speed = AR71XX_MII_CTRL_SPEED_100;
+ break;
+ case SPEED_1000:
+ mii_speed = AR71XX_MII_CTRL_SPEED_1000;
+ break;
+ default:
+ BUG();
+ }
+
+ t = __raw_readl(ag->mii_base);
+ t &= ~(AR71XX_MII_CTRL_SPEED_MASK << AR71XX_MII_CTRL_SPEED_SHIFT);
+ t |= mii_speed << AR71XX_MII_CTRL_SPEED_SHIFT;
+ __raw_writel(t, ag->mii_base);
+}
+
+static void
+__ag71xx_link_adjust(struct ag71xx *ag, bool update)
+{
+ struct device_node *np = ag->pdev->dev.of_node;
+ u32 cfg2;
+ u32 ifctl;
+ u32 fifo5;
+
+ if (!ag->link && update) {
+ ag71xx_hw_stop(ag);
+ netif_carrier_off(ag->dev);
+ if (netif_msg_link(ag))
+ pr_info("%s: link down\n", ag->dev->name);
+ return;
+ }
+
+ if (!of_device_is_compatible(np, "qca,ar9130-eth") &&
+ !of_device_is_compatible(np, "qca,ar7100-eth"))
+ ag71xx_fast_reset(ag);
+
+ cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
+ cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
+ cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
+
+ ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
+ ifctl &= ~(MAC_IFCTL_SPEED);
+
+ fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
+ fifo5 &= ~FIFO_CFG5_BM;
+
+ switch (ag->speed) {
+ case SPEED_1000:
+ cfg2 |= MAC_CFG2_IF_1000;
+ fifo5 |= FIFO_CFG5_BM;
+ break;
+ case SPEED_100:
+ cfg2 |= MAC_CFG2_IF_10_100;
+ ifctl |= MAC_IFCTL_SPEED;
+ break;
+ case SPEED_10:
+ cfg2 |= MAC_CFG2_IF_10_100;
+ break;
+ default:
+ BUG();
+ return;
+ }
+
+ if (ag->tx_ring.desc_split) {
+ ag->fifodata[2] &= 0xffff;
+ ag->fifodata[2] |= ((2048 - ag->tx_ring.desc_split) / 4) << 16;
+ }
+
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, ag->fifodata[2]);
+
+ if (update) {
+ if (of_device_is_compatible(np, "qca,ar7100-eth") ||
+ of_device_is_compatible(np, "qca,ar9130-eth")) {
+ ath79_set_pll(ag);
+ ath79_mii_ctrl_set_speed(ag);
+ } else if (of_device_is_compatible(np, "qca,ar7242-eth") ||
+ of_device_is_compatible(np, "qca,ar9340-eth") ||
+ of_device_is_compatible(np, "qca,qca9550-eth") ||
+ of_device_is_compatible(np, "qca,qca9560-eth")) {
+ ath79_set_pllval(ag);
+ if (of_property_read_bool(np, "qca955x-sgmii-fixup"))
+ ag71xx_sgmii_init_qca955x(np);
+ }
+ }
+
+ ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
+ ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
+ ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
+
+ if (of_device_is_compatible(np, "qca,qca9530-eth") ||
+ of_device_is_compatible(np, "qca,qca9560-eth")) {
+ /*
+ * The rx ring buffer can stall on small packets on QCA953x and
+ * QCA956x. Disabling the inline checksum engine fixes the stall.
+ * The wr, rr functions cannot be used since this hidden register
+ * is outside of the normal ag71xx register block.
+ */
+ void __iomem *dam = ioremap_nocache(0xb90001bc, 0x4);
+ if (dam) {
+ __raw_writel(__raw_readl(dam) & ~BIT(27), dam);
+ (void)__raw_readl(dam);
+ iounmap(dam);
+ }
+ }
+
+ ag71xx_hw_start(ag);
+
+ netif_carrier_on(ag->dev);
+ if (update && netif_msg_link(ag))
+ pr_info("%s: link up (%sMbps/%s duplex)\n",
+ ag->dev->name,
+ ag71xx_speed_str(ag),
+ (DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
+
+ ag71xx_dump_regs(ag);
+}
+
+void ag71xx_link_adjust(struct ag71xx *ag)
+{
+ __ag71xx_link_adjust(ag, true);
+}
+
+static int ag71xx_hw_enable(struct ag71xx *ag)
+{
+ int ret;
+
+ ret = ag71xx_rings_init(ag);
+ if (ret)
+ return ret;
+
+ napi_enable(&ag->napi);
+ ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma);
+ ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->rx_ring.descs_dma);
+ netif_start_queue(ag->dev);
+
+ return 0;
+}
+
+static void ag71xx_hw_disable(struct ag71xx *ag)
+{
+ netif_stop_queue(ag->dev);
+
+ ag71xx_hw_stop(ag);
+ ag71xx_dma_reset(ag);
+
+ napi_disable(&ag->napi);
+ del_timer_sync(&ag->oom_timer);
+
+ ag71xx_rings_cleanup(ag);
+}
+
+static int ag71xx_open(struct net_device *dev)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+ unsigned int max_frame_len;
+ int ret;
+
+ netif_carrier_off(dev);
+ max_frame_len = ag71xx_max_frame_len(dev->mtu);
+ ag->rx_buf_size = SKB_DATA_ALIGN(max_frame_len + NET_SKB_PAD + NET_IP_ALIGN);
+
+ /* setup max frame length */
+ ag71xx_wr(ag, AG71XX_REG_MAC_MFL, max_frame_len);
+ ag71xx_hw_set_macaddr(ag, dev->dev_addr);
+
+ ret = ag71xx_hw_enable(ag);
+ if (ret)
+ goto err;
+
+ phy_start(ag->phy_dev);
+
+ return 0;
+
+err:
+ ag71xx_rings_cleanup(ag);
+ return ret;
+}
+
+static int ag71xx_stop(struct net_device *dev)
+{
+ unsigned long flags;
+ struct ag71xx *ag = netdev_priv(dev);
+
+ netif_carrier_off(dev);
+ phy_stop(ag->phy_dev);
+
+ spin_lock_irqsave(&ag->lock, flags);
+ if (ag->link) {
+ ag->link = 0;
+ ag71xx_link_adjust(ag);
+ }
+ spin_unlock_irqrestore(&ag->lock, flags);
+
+ ag71xx_hw_disable(ag);
+
+ return 0;
+}
+
+static int ag71xx_fill_dma_desc(struct ag71xx_ring *ring, u32 addr, int len)
+{
+ int i;
+ struct ag71xx_desc *desc;
+ int ring_mask = BIT(ring->order) - 1;
+ int ndesc = 0;
+ int split = ring->desc_split;
+
+ if (!split)
+ split = len;
+
+ while (len > 0) {
+ unsigned int cur_len = len;
+
+ i = (ring->curr + ndesc) & ring_mask;
+ desc = ag71xx_ring_desc(ring, i);
+
+ if (!ag71xx_desc_empty(desc))
+ return -1;
+
+ if (cur_len > split) {
+ cur_len = split;
+
+ /*
+ * TX will hang if DMA transfers <= 4 bytes,
+ * make sure next segment is more than 4 bytes long.
+ */
+ if (len <= split + 4)
+ cur_len -= 4;
+ }
+
+ desc->data = addr;
+ addr += cur_len;
+ len -= cur_len;
+
+ if (len > 0)
+ cur_len |= DESC_MORE;
+
+ /* prevent early tx attempt of this descriptor */
+ if (!ndesc)
+ cur_len |= DESC_EMPTY;
+
+ desc->ctrl = cur_len;
+ ndesc++;
+ }
+
+ return ndesc;
+}
+
+static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+ struct ag71xx_ring *ring = &ag->tx_ring;
+ int ring_mask = BIT(ring->order) - 1;
+ int ring_size = BIT(ring->order);
+ struct ag71xx_desc *desc;
+ dma_addr_t dma_addr;
+ int i, n, ring_min;
+
+ if (skb->len <= 4) {
+ DBG("%s: packet len is too small\n", ag->dev->name);
+ goto err_drop;
+ }
+
+ dma_addr = dma_map_single(&ag->pdev->dev, skb->data, skb->len,
+ DMA_TO_DEVICE);
+
+ i = ring->curr & ring_mask;
+ desc = ag71xx_ring_desc(ring, i);
+
+ /* setup descriptor fields */
+ n = ag71xx_fill_dma_desc(ring, (u32) dma_addr, skb->len & ag->desc_pktlen_mask);
+ if (n < 0)
+ goto err_drop_unmap;
+
+ i = (ring->curr + n - 1) & ring_mask;
+ ring->buf[i].len = skb->len;
+ ring->buf[i].skb = skb;
+
+ netdev_sent_queue(dev, skb->len);
+
+ skb_tx_timestamp(skb);
+
+ desc->ctrl &= ~DESC_EMPTY;
+ ring->curr += n;
+
+ /* flush descriptor */
+ wmb();
+
+ ring_min = 2;
+ if (ring->desc_split)
+ ring_min *= AG71XX_TX_RING_DS_PER_PKT;
+
+ if (ring->curr - ring->dirty >= ring_size - ring_min) {
+ DBG("%s: tx queue full\n", dev->name);
+ netif_stop_queue(dev);
+ }
+
+ DBG("%s: packet injected into TX queue\n", ag->dev->name);
+
+ /* enable TX engine */
+ ag71xx_wr(ag, AG71XX_REG_TX_CTRL, TX_CTRL_TXE);
+
+ return NETDEV_TX_OK;
+
+err_drop_unmap:
+ dma_unmap_single(&ag->pdev->dev, dma_addr, skb->len, DMA_TO_DEVICE);
+
+err_drop:
+ dev->stats.tx_dropped++;
+
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+
+
+ switch (cmd) {
+ case SIOCSIFHWADDR:
+ if (copy_from_user
+ (dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr)))
+ return -EFAULT;
+ return 0;
+
+ case SIOCGIFHWADDR:
+ if (copy_to_user
+ (ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr)))
+ return -EFAULT;
+ return 0;
+
+ case SIOCGMIIPHY:
+ case SIOCGMIIREG:
+ case SIOCSMIIREG:
+ if (ag->phy_dev == NULL)
+ break;
+
+ return phy_mii_ioctl(ag->phy_dev, ifr, cmd);
+
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,15,0))
+static void ag71xx_oom_timer_handler(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *) data;
+ struct ag71xx *ag = netdev_priv(dev);
+#else
+static void ag71xx_oom_timer_handler(struct timer_list *t)
+{
+ struct ag71xx *ag = from_timer(ag, t, oom_timer);
+#endif
+
+ napi_schedule(&ag->napi);
+}
+
+static void ag71xx_tx_timeout(struct net_device *dev)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+
+ if (netif_msg_tx_err(ag))
+ pr_info("%s: tx timeout\n", ag->dev->name);
+
+ schedule_delayed_work(&ag->restart_work, 1);
+}
+
+static void ag71xx_restart_work_func(struct work_struct *work)
+{
+ struct ag71xx *ag = container_of(work, struct ag71xx, restart_work.work);
+
+ rtnl_lock();
+ ag71xx_hw_disable(ag);
+ ag71xx_hw_enable(ag);
+ if (ag->link)
+ __ag71xx_link_adjust(ag, false);
+ rtnl_unlock();
+}
+
+static bool ag71xx_check_dma_stuck(struct ag71xx *ag)
+{
+ unsigned long timestamp;
+ u32 rx_sm, tx_sm, rx_fd;
+
+ timestamp = netdev_get_tx_queue(ag->dev, 0)->trans_start;
+ if (likely(time_before(jiffies, timestamp + HZ/10)))
+ return false;
+
+ if (!netif_carrier_ok(ag->dev))
+ return false;
+
+ rx_sm = ag71xx_rr(ag, AG71XX_REG_RX_SM);
+ if ((rx_sm & 0x7) == 0x3 && ((rx_sm >> 4) & 0x7) == 0x6)
+ return true;
+
+ tx_sm = ag71xx_rr(ag, AG71XX_REG_TX_SM);
+ rx_fd = ag71xx_rr(ag, AG71XX_REG_FIFO_DEPTH);
+ if (((tx_sm >> 4) & 0x7) == 0 && ((rx_sm & 0x7) == 0) &&
+ ((rx_sm >> 4) & 0x7) == 0 && rx_fd == 0)
+ return true;
+
+ return false;
+}
+
+static int ag71xx_tx_packets(struct ag71xx *ag, bool flush)
+{
+ struct ag71xx_ring *ring = &ag->tx_ring;
+ bool dma_stuck = false;
+ int ring_mask = BIT(ring->order) - 1;
+ int ring_size = BIT(ring->order);
+ int sent = 0;
+ int bytes_compl = 0;
+ int n = 0;
+
+ DBG("%s: processing TX ring\n", ag->dev->name);
+
+ while (ring->dirty + n != ring->curr) {
+ unsigned int i = (ring->dirty + n) & ring_mask;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+ struct sk_buff *skb = ring->buf[i].skb;
+
+ if (!flush && !ag71xx_desc_empty(desc)) {
+ if (ag->tx_hang_workaround &&
+ ag71xx_check_dma_stuck(ag)) {
+ schedule_delayed_work(&ag->restart_work, HZ / 2);
+ dma_stuck = true;
+ }
+ break;
+ }
+
+ if (flush)
+ desc->ctrl |= DESC_EMPTY;
+
+ n++;
+ if (!skb)
+ continue;
+
+ dev_kfree_skb_any(skb);
+ ring->buf[i].skb = NULL;
+
+ bytes_compl += ring->buf[i].len;
+
+ sent++;
+ ring->dirty += n;
+
+ while (n > 0) {
+ ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
+ n--;
+ }
+ }
+
+ DBG("%s: %d packets sent out\n", ag->dev->name, sent);
+
+ if (!sent)
+ return 0;
+
+ ag->dev->stats.tx_bytes += bytes_compl;
+ ag->dev->stats.tx_packets += sent;
+
+ netdev_completed_queue(ag->dev, sent, bytes_compl);
+ if ((ring->curr - ring->dirty) < (ring_size * 3) / 4)
+ netif_wake_queue(ag->dev);
+
+ if (!dma_stuck)
+ cancel_delayed_work(&ag->restart_work);
+
+ return sent;
+}
+
+static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
+{
+ struct net_device *dev = ag->dev;
+ struct ag71xx_ring *ring = &ag->rx_ring;
+ unsigned int pktlen_mask = ag->desc_pktlen_mask;
+ unsigned int offset = ag->rx_buf_offset;
+ int ring_mask = BIT(ring->order) - 1;
+ int ring_size = BIT(ring->order);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
+ struct list_head rx_list;
+ struct sk_buff *next;
+#else
+ struct sk_buff_head queue;
+#endif
+ struct sk_buff *skb;
+ int done = 0;
+
+ DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n",
+ dev->name, limit, ring->curr, ring->dirty);
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
+ INIT_LIST_HEAD(&rx_list);
+#else
+ skb_queue_head_init(&queue);
+#endif
+
+ while (done < limit) {
+ unsigned int i = ring->curr & ring_mask;
+ struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+ int pktlen;
+ int err = 0;
+
+ if (ag71xx_desc_empty(desc))
+ break;
+
+ if ((ring->dirty + ring_size) == ring->curr) {
+ ag71xx_assert(0);
+ break;
+ }
+
+ ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
+
+ pktlen = desc->ctrl & pktlen_mask;
+ pktlen -= ETH_FCS_LEN;
+
+ dma_unmap_single(&ag->pdev->dev, ring->buf[i].dma_addr,
+ ag->rx_buf_size, DMA_FROM_DEVICE);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += pktlen;
+
+ skb = build_skb(ring->buf[i].rx_buf, ag71xx_buffer_size(ag));
+ if (!skb) {
+ skb_free_frag(ring->buf[i].rx_buf);
+ goto next;
+ }
+
+ skb_reserve(skb, offset);
+ skb_put(skb, pktlen);
+
+ if (err) {
+ dev->stats.rx_dropped++;
+ kfree_skb(skb);
+ } else {
+ skb->dev = dev;
+ skb->ip_summed = CHECKSUM_NONE;
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
+ list_add_tail(&skb->list, &rx_list);
+#else
+ __skb_queue_tail(&queue, skb);
+#endif
+ }
+
+next:
+ ring->buf[i].rx_buf = NULL;
+ done++;
+
+ ring->curr++;
+ }
+
+ ag71xx_ring_rx_refill(ag);
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
+ list_for_each_entry_safe(skb, next, &rx_list, list)
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_receive_skb_list(&rx_list);
+#else
+ while ((skb = __skb_dequeue(&queue)) != NULL) {
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_receive_skb(skb);
+ }
+#endif
+
+ DBG("%s: rx finish, curr=%u, dirty=%u, done=%d\n",
+ dev->name, ring->curr, ring->dirty, done);
+
+ return done;
+}
+
+static int ag71xx_poll(struct napi_struct *napi, int limit)
+{
+ struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
+ struct net_device *dev = ag->dev;
+ struct ag71xx_ring *rx_ring = &ag->rx_ring;
+ int rx_ring_size = BIT(rx_ring->order);
+ unsigned long flags;
+ u32 status;
+ int tx_done;
+ int rx_done;
+
+ tx_done = ag71xx_tx_packets(ag, false);
+
+ DBG("%s: processing RX ring\n", dev->name);
+ rx_done = ag71xx_rx_packets(ag, limit);
+
+ ag71xx_debugfs_update_napi_stats(ag, rx_done, tx_done);
+
+ if (rx_ring->buf[rx_ring->dirty % rx_ring_size].rx_buf == NULL)
+ goto oom;
+
+ status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
+ if (unlikely(status & RX_STATUS_OF)) {
+ ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF);
+ dev->stats.rx_fifo_errors++;
+
+ /* restart RX */
+ ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE);
+ }
+
+ if (rx_done < limit) {
+ if (status & RX_STATUS_PR)
+ goto more;
+
+ status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS);
+ if (status & TX_STATUS_PS)
+ goto more;
+
+ DBG("%s: disable polling mode, rx=%d, tx=%d,limit=%d\n",
+ dev->name, rx_done, tx_done, limit);
+
+ napi_complete(napi);
+
+ /* enable interrupts */
+ spin_lock_irqsave(&ag->lock, flags);
+ ag71xx_int_enable(ag, AG71XX_INT_POLL);
+ spin_unlock_irqrestore(&ag->lock, flags);
+ return rx_done;
+ }
+
+more:
+ DBG("%s: stay in polling mode, rx=%d, tx=%d, limit=%d\n",
+ dev->name, rx_done, tx_done, limit);
+ return limit;
+
+oom:
+ if (netif_msg_rx_err(ag))
+ pr_info("%s: out of memory\n", dev->name);
+
+ mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL);
+ napi_complete(napi);
+ return 0;
+}
+
+static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct ag71xx *ag = netdev_priv(dev);
+ u32 status;
+
+ status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
+ ag71xx_dump_intr(ag, "raw", status);
+
+ if (unlikely(!status))
+ return IRQ_NONE;
+
+ if (unlikely(status & AG71XX_INT_ERR)) {
+ if (status & AG71XX_INT_TX_BE) {
+ ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE);
+ dev_err(&dev->dev, "TX BUS error\n");
+ }
+ if (status & AG71XX_INT_RX_BE) {
+ ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE);
+ dev_err(&dev->dev, "RX BUS error\n");
+ }
+ }
+
+ if (likely(status & AG71XX_INT_POLL)) {
+ ag71xx_int_disable(ag, AG71XX_INT_POLL);
+ DBG("%s: enable polling mode\n", dev->name);
+ napi_schedule(&ag->napi);
+ }
+
+ ag71xx_debugfs_update_int_stats(ag, status);
+
+ return IRQ_HANDLED;
+}
+
+static int ag71xx_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+
+ dev->mtu = new_mtu;
+ ag71xx_wr(ag, AG71XX_REG_MAC_MFL,
+ ag71xx_max_frame_len(dev->mtu));
+
+ return 0;
+}
+
+static const struct net_device_ops ag71xx_netdev_ops = {
+ .ndo_open = ag71xx_open,
+ .ndo_stop = ag71xx_stop,
+ .ndo_start_xmit = ag71xx_hard_start_xmit,
+ .ndo_do_ioctl = ag71xx_do_ioctl,
+ .ndo_tx_timeout = ag71xx_tx_timeout,
+ .ndo_change_mtu = ag71xx_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static int ag71xx_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct net_device *dev;
+ struct resource *res;
+ struct ag71xx *ag;
+ const void *mac_addr;
+ u32 max_frame_len;
+ int tx_size, err;
+
+ if (!np)
+ return -ENODEV;
+
+ dev = devm_alloc_etherdev(&pdev->dev, sizeof(*ag));
+ if (!dev)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+
+ err = ag71xx_setup_gmac(np);
+ if (err)
+ return err;
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ ag = netdev_priv(dev);
+ ag->pdev = pdev;
+ ag->dev = dev;
+ ag->msg_enable = netif_msg_init(ag71xx_msg_level,
+ AG71XX_DEFAULT_MSG_ENABLE);
+ spin_lock_init(&ag->lock);
+
+ ag->mac_reset = devm_reset_control_get_exclusive(&pdev->dev, "mac");
+ if (IS_ERR(ag->mac_reset)) {
+ dev_err(&pdev->dev, "missing mac reset\n");
+ return PTR_ERR(ag->mac_reset);
+ }
+
+ ag->mdio_reset = devm_reset_control_get_optional_exclusive(&pdev->dev, "mdio");
+
+ if (of_property_read_u32_array(np, "fifo-data", ag->fifodata, 3)) {
+ if (of_device_is_compatible(np, "qca,ar9130-eth") ||
+ of_device_is_compatible(np, "qca,ar7100-eth")) {
+ ag->fifodata[0] = 0x0fff0000;
+ ag->fifodata[1] = 0x00001fff;
+ } else {
+ ag->fifodata[0] = 0x0010ffff;
+ ag->fifodata[1] = 0x015500aa;
+ ag->fifodata[2] = 0x01f00140;
+ }
+ if (of_device_is_compatible(np, "qca,ar9130-eth"))
+ ag->fifodata[2] = 0x00780fff;
+ else if (of_device_is_compatible(np, "qca,ar7100-eth"))
+ ag->fifodata[2] = 0x008001ff;
+ }
+
+ if (of_property_read_u32_array(np, "pll-data", ag->plldata, 3))
+ dev_dbg(&pdev->dev, "failed to read pll-data property\n");
+
+ if (of_property_read_u32_array(np, "pll-reg", ag->pllreg, 3))
+ dev_dbg(&pdev->dev, "failed to read pll-reg property\n");
+
+ ag->pllregmap = syscon_regmap_lookup_by_phandle(np, "pll-handle");
+ if (IS_ERR(ag->pllregmap)) {
+ dev_dbg(&pdev->dev, "failed to read pll-handle property\n");
+ ag->pllregmap = NULL;
+ }
+
+ ag->mac_base = devm_ioremap_nocache(&pdev->dev, res->start,
+ res->end - res->start + 1);
+ if (!ag->mac_base)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (res) {
+ ag->mii_base = devm_ioremap_nocache(&pdev->dev, res->start,
+ res->end - res->start + 1);
+ if (!ag->mii_base)
+ return -ENOMEM;
+ }
+
+ dev->irq = platform_get_irq(pdev, 0);
+ err = devm_request_irq(&pdev->dev, dev->irq, ag71xx_interrupt,
+ 0x0, dev_name(&pdev->dev), dev);
+ if (err) {
+ dev_err(&pdev->dev, "unable to request IRQ %d\n", dev->irq);
+ return err;
+ }
+
+ dev->netdev_ops = &ag71xx_netdev_ops;
+ dev->ethtool_ops = &ag71xx_ethtool_ops;
+
+ INIT_DELAYED_WORK(&ag->restart_work, ag71xx_restart_work_func);
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,15,0))
+ init_timer(&ag->oom_timer);
+ ag->oom_timer.data = (unsigned long) dev;
+ ag->oom_timer.function = ag71xx_oom_timer_handler;
+#else
+ timer_setup(&ag->oom_timer, ag71xx_oom_timer_handler, 0);
+#endif
+
+ tx_size = AG71XX_TX_RING_SIZE_DEFAULT;
+ ag->rx_ring.order = ag71xx_ring_size_order(AG71XX_RX_RING_SIZE_DEFAULT);
+
+ if (of_device_is_compatible(np, "qca,ar9340-eth") ||
+ of_device_is_compatible(np, "qca,qca9530-eth") ||
+ of_device_is_compatible(np, "qca,qca9550-eth") ||
+ of_device_is_compatible(np, "qca,qca9560-eth"))
+ ag->desc_pktlen_mask = SZ_16K - 1;
+ else
+ ag->desc_pktlen_mask = SZ_4K - 1;
+
+ if (ag->desc_pktlen_mask == SZ_16K - 1 &&
+ !of_device_is_compatible(np, "qca,qca9550-eth") &&
+ !of_device_is_compatible(np, "qca,qca9560-eth"))
+ max_frame_len = ag->desc_pktlen_mask;
+ else
+ max_frame_len = 1540;
+
+ dev->min_mtu = 68;
+ dev->max_mtu = max_frame_len - ag71xx_max_frame_len(0);
+
+ if (of_device_is_compatible(np, "qca,ar7240-eth") ||
+ of_device_is_compatible(np, "qca,ar7241-eth") ||
+ of_device_is_compatible(np, "qca,ar7242-eth") ||
+ of_device_is_compatible(np, "qca,ar9330-eth") ||
+ of_device_is_compatible(np, "qca,ar9340-eth") ||
+ of_device_is_compatible(np, "qca,qca9530-eth") ||
+ of_device_is_compatible(np, "qca,qca9550-eth") ||
+ of_device_is_compatible(np, "qca,qca9560-eth"))
+ ag->tx_hang_workaround = 1;
+
+ ag->rx_buf_offset = NET_SKB_PAD;
+ if (!of_device_is_compatible(np, "qca,ar7100-eth") &&
+ !of_device_is_compatible(np, "qca,ar9130-eth"))
+ ag->rx_buf_offset += NET_IP_ALIGN;
+
+ if (of_device_is_compatible(np, "qca,ar7100-eth")) {
+ ag->tx_ring.desc_split = AG71XX_TX_RING_SPLIT;
+ tx_size *= AG71XX_TX_RING_DS_PER_PKT;
+ }
+ ag->tx_ring.order = ag71xx_ring_size_order(tx_size);
+
+ ag->stop_desc = dmam_alloc_coherent(&pdev->dev,
+ sizeof(struct ag71xx_desc),
+ &ag->stop_desc_dma, GFP_KERNEL);
+ if (!ag->stop_desc)
+ return -ENOMEM;
+
+ ag->stop_desc->data = 0;
+ ag->stop_desc->ctrl = 0;
+ ag->stop_desc->next = (u32) ag->stop_desc_dma;
+
+ mac_addr = of_get_mac_address(np);
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(5,2,0))
+ if (!mac_addr || !is_valid_ether_addr(mac_addr)) {
+#else
+ if (IS_ERR(mac_addr) || !is_valid_ether_addr(mac_addr)) {
+#endif
+ dev_err(&pdev->dev, "invalid MAC address, using random address\n");
+ eth_random_addr(dev->dev_addr);
+ } else {
+ memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
+ }
+
+ ag->phy_if_mode = of_get_phy_mode(np);
+ if (ag->phy_if_mode < 0) {
+ dev_err(&pdev->dev, "missing phy-mode property in DT\n");
+ return ag->phy_if_mode;
+ }
+
+ if (of_property_read_u32(np, "qca,mac-idx", &ag->mac_idx))
+ ag->mac_idx = -1;
+ if (ag->mii_base)
+ switch (ag->mac_idx) {
+ case 0:
+ ath79_mii0_ctrl_set_if(ag);
+ break;
+ case 1:
+ ath79_mii1_ctrl_set_if(ag);
+ break;
+ default:
+ break;
+ }
+
+ netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
+
+ ag71xx_dump_regs(ag);
+
+ ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, 0);
+
+ ag71xx_hw_init(ag);
+
+ ag71xx_dump_regs(ag);
+
+ /*
+ * populate current node to register mdio-bus as a subdevice.
+ * the mdio bus works independently on ar7241 and later chips
+ * and we need to load mdio1 before gmac0, which can be done
+ * by adding a "simple-mfd" compatible to gmac node. The
+ * following code checks OF_POPULATED_BUS flag before populating
+ * to avoid duplicated population.
+ */
+ if (!of_node_check_flag(np, OF_POPULATED_BUS)) {
+ err = of_platform_populate(np, NULL, NULL, &pdev->dev);
+ if (err)
+ return err;
+ }
+
+ err = ag71xx_phy_connect(ag);
+ if (err)
+ return err;
+
+ err = ag71xx_debugfs_init(ag);
+ if (err)
+ goto err_phy_disconnect;
+
+ platform_set_drvdata(pdev, dev);
+
+ err = register_netdev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "unable to register net device\n");
+ platform_set_drvdata(pdev, NULL);
+ ag71xx_debugfs_exit(ag);
+ goto err_phy_disconnect;
+ }
+
+ pr_info("%s: Atheros AG71xx at 0x%08lx, irq %d, mode: %s\n",
+ dev->name, (unsigned long) ag->mac_base, dev->irq,
+ phy_modes(ag->phy_if_mode));
+
+ return 0;
+
+err_phy_disconnect:
+ ag71xx_phy_disconnect(ag);
+ return err;
+}
+
+static int ag71xx_remove(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct ag71xx *ag;
+
+ if (!dev)
+ return 0;
+
+ ag = netdev_priv(dev);
+ ag71xx_debugfs_exit(ag);
+ ag71xx_phy_disconnect(ag);
+ unregister_netdev(dev);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static const struct of_device_id ag71xx_match[] = {
+ { .compatible = "qca,ar7100-eth" },
+ { .compatible = "qca,ar7240-eth" },
+ { .compatible = "qca,ar7241-eth" },
+ { .compatible = "qca,ar7242-eth" },
+ { .compatible = "qca,ar9130-eth" },
+ { .compatible = "qca,ar9330-eth" },
+ { .compatible = "qca,ar9340-eth" },
+ { .compatible = "qca,qca9530-eth" },
+ { .compatible = "qca,qca9550-eth" },
+ { .compatible = "qca,qca9560-eth" },
+ {}
+};
+
+static struct platform_driver ag71xx_driver = {
+ .probe = ag71xx_probe,
+ .remove = ag71xx_remove,
+ .driver = {
+ .name = AG71XX_DRV_NAME,
+ .of_match_table = ag71xx_match,
+ }
+};
+
+static int __init ag71xx_module_init(void)
+{
+ int ret;
+
+ ret = ag71xx_debugfs_root_init();
+ if (ret)
+ goto err_out;
+
+ ret = platform_driver_register(&ag71xx_driver);
+ if (ret)
+ goto err_debugfs_exit;
+
+ return 0;
+
+err_debugfs_exit:
+ ag71xx_debugfs_root_exit();
+err_out:
+ return ret;
+}
+
+static void __exit ag71xx_module_exit(void)
+{
+ platform_driver_unregister(&ag71xx_driver);
+ ag71xx_debugfs_root_exit();
+}
+
+module_init(ag71xx_module_init);
+module_exit(ag71xx_module_exit);
+
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
+MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>");
+MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" AG71XX_DRV_NAME);
--- /dev/null
+/*
+ * Atheros AR71xx built-in ethernet mac driver
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Based on Atheros' AG7100 driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/of_mdio.h>
+#include "ag71xx.h"
+
+#define AG71XX_MDIO_RETRY 1000
+#define AG71XX_MDIO_DELAY 5
+
+static int bus_count;
+
+static int ag71xx_mdio_wait_busy(struct ag71xx_mdio *am)
+{
+ int i;
+
+ for (i = 0; i < AG71XX_MDIO_RETRY; i++) {
+ u32 busy;
+
+ udelay(AG71XX_MDIO_DELAY);
+
+ regmap_read(am->mii_regmap, AG71XX_REG_MII_IND, &busy);
+ if (!busy)
+ return 0;
+
+ udelay(AG71XX_MDIO_DELAY);
+ }
+
+ pr_err("%s: MDIO operation timed out\n", am->mii_bus->name);
+
+ return -ETIMEDOUT;
+}
+
+static int ag71xx_mdio_mii_read(struct mii_bus *bus, int addr, int reg)
+{
+ struct ag71xx_mdio *am = bus->priv;
+ int err;
+ int ret;
+
+ err = ag71xx_mdio_wait_busy(am);
+ if (err)
+ return 0xffff;
+
+ regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
+ regmap_write(am->mii_regmap, AG71XX_REG_MII_ADDR,
+ ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
+ regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_READ);
+
+ err = ag71xx_mdio_wait_busy(am);
+ if (err)
+ return 0xffff;
+
+ regmap_read(am->mii_regmap, AG71XX_REG_MII_STATUS, &ret);
+ ret &= 0xffff;
+ regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
+
+ DBG("mii_read: addr=%04x, reg=%04x, value=%04x\n", addr, reg, ret);
+
+ return ret;
+}
+
+static int ag71xx_mdio_mii_write(struct mii_bus *bus, int addr, int reg, u16 val)
+{
+ struct ag71xx_mdio *am = bus->priv;
+
+ DBG("mii_write: addr=%04x, reg=%04x, value=%04x\n", addr, reg, val);
+
+ regmap_write(am->mii_regmap, AG71XX_REG_MII_ADDR,
+ ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
+ regmap_write(am->mii_regmap, AG71XX_REG_MII_CTRL, val);
+
+ ag71xx_mdio_wait_busy(am);
+
+ return 0;
+}
+
+static const u32 ar71xx_mdio_div_table[] = {
+ 4, 4, 6, 8, 10, 14, 20, 28,
+};
+
+static const u32 ar7240_mdio_div_table[] = {
+ 2, 2, 4, 6, 8, 12, 18, 26, 32, 40, 48, 56, 62, 70, 78, 96,
+};
+
+static const u32 ar933x_mdio_div_table[] = {
+ 4, 4, 6, 8, 10, 14, 20, 28, 34, 42, 50, 58, 66, 74, 82, 98,
+};
+
+static int ag71xx_mdio_get_divider(struct device_node *np, u32 *div)
+{
+ struct clk *ref_clk = of_clk_get(np, 0);
+ unsigned long ref_clock;
+ u32 mdio_clock;
+ const u32 *table;
+ int ndivs, i;
+
+ if (IS_ERR(ref_clk))
+ return -EINVAL;
+
+ ref_clock = clk_get_rate(ref_clk);
+ clk_put(ref_clk);
+
+ if(of_property_read_u32(np, "qca,mdio-max-frequency", &mdio_clock)) {
+ if (of_property_read_bool(np, "builtin-switch"))
+ mdio_clock = 5000000;
+ else
+ mdio_clock = 2000000;
+ }
+
+ if (of_device_is_compatible(np, "qca,ar9330-mdio") ||
+ of_device_is_compatible(np, "qca,ar9340-mdio")) {
+ table = ar933x_mdio_div_table;
+ ndivs = ARRAY_SIZE(ar933x_mdio_div_table);
+ } else if (of_device_is_compatible(np, "qca,ar7240-mdio")) {
+ table = ar7240_mdio_div_table;
+ ndivs = ARRAY_SIZE(ar7240_mdio_div_table);
+ } else {
+ table = ar71xx_mdio_div_table;
+ ndivs = ARRAY_SIZE(ar71xx_mdio_div_table);
+ }
+
+ for (i = 0; i < ndivs; i++) {
+ unsigned long t;
+
+ t = ref_clock / table[i];
+ if (t <= mdio_clock) {
+ *div = i;
+ return 0;
+ }
+ }
+
+ return -ENOENT;
+}
+
+static int ag71xx_mdio_reset(struct mii_bus *bus)
+{
+ struct device_node *np = bus->dev.of_node;
+ struct ag71xx_mdio *am = bus->priv;
+ bool builtin_switch;
+ u32 t;
+
+ builtin_switch = of_property_read_bool(np, "builtin-switch");
+
+ if (ag71xx_mdio_get_divider(np, &t)) {
+ if (of_device_is_compatible(np, "qca,ar9340-mdio"))
+ t = MII_CFG_CLK_DIV_58;
+ else if (builtin_switch)
+ t = MII_CFG_CLK_DIV_10;
+ else
+ t = MII_CFG_CLK_DIV_28;
+ }
+
+ regmap_write(am->mii_regmap, AG71XX_REG_MII_CFG, t | MII_CFG_RESET);
+ udelay(100);
+
+ regmap_write(am->mii_regmap, AG71XX_REG_MII_CFG, t);
+ udelay(100);
+
+ return 0;
+}
+
+static int ag71xx_mdio_probe(struct platform_device *pdev)
+{
+ struct device *amdev = &pdev->dev;
+ struct device_node *np = pdev->dev.of_node;
+ struct ag71xx_mdio *am;
+ struct mii_bus *mii_bus;
+ bool builtin_switch;
+ int i, err;
+
+ am = devm_kzalloc(amdev, sizeof(*am), GFP_KERNEL);
+ if (!am)
+ return -ENOMEM;
+
+ am->mii_regmap = syscon_regmap_lookup_by_phandle(np, "regmap");
+ if (IS_ERR(am->mii_regmap))
+ return PTR_ERR(am->mii_regmap);
+
+ mii_bus = devm_mdiobus_alloc(amdev);
+ if (!mii_bus)
+ return -ENOMEM;
+
+ am->mdio_reset = devm_reset_control_get_exclusive(amdev, "mdio");
+ builtin_switch = of_property_read_bool(np, "builtin-switch");
+
+ mii_bus->name = "ag71xx_mdio";
+ mii_bus->read = ag71xx_mdio_mii_read;
+ mii_bus->write = ag71xx_mdio_mii_write;
+ mii_bus->reset = ag71xx_mdio_reset;
+ mii_bus->priv = am;
+ mii_bus->parent = amdev;
+ snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%s.%d", np->name, bus_count++);
+
+ if (!builtin_switch &&
+ of_property_read_u32(np, "phy-mask", &mii_bus->phy_mask))
+ mii_bus->phy_mask = 0;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++)
+ mii_bus->irq[i] = PHY_POLL;
+
+ if (!IS_ERR(am->mdio_reset)) {
+ reset_control_assert(am->mdio_reset);
+ msleep(100);
+ reset_control_deassert(am->mdio_reset);
+ msleep(200);
+ }
+
+ err = of_mdiobus_register(mii_bus, np);
+ if (err)
+ return err;
+
+ am->mii_bus = mii_bus;
+ platform_set_drvdata(pdev, am);
+
+ return 0;
+}
+
+static int ag71xx_mdio_remove(struct platform_device *pdev)
+{
+ struct ag71xx_mdio *am = platform_get_drvdata(pdev);
+
+ mdiobus_unregister(am->mii_bus);
+ return 0;
+}
+
+static const struct of_device_id ag71xx_mdio_match[] = {
+ { .compatible = "qca,ar7240-mdio" },
+ { .compatible = "qca,ar9330-mdio" },
+ { .compatible = "qca,ar9340-mdio" },
+ { .compatible = "qca,ath79-mdio" },
+ {}
+};
+
+static struct platform_driver ag71xx_mdio_driver = {
+ .probe = ag71xx_mdio_probe,
+ .remove = ag71xx_mdio_remove,
+ .driver = {
+ .name = "ag71xx-mdio",
+ .of_match_table = ag71xx_mdio_match,
+ }
+};
+
+module_platform_driver(ag71xx_mdio_driver);
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Atheros AR71xx built-in ethernet mac driver
+ *
+ * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Based on Atheros' AG7100 driver
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/of_mdio.h>
+#include "ag71xx.h"
+
+static void ag71xx_phy_link_adjust(struct net_device *dev)
+{
+ struct ag71xx *ag = netdev_priv(dev);
+ struct phy_device *phydev = ag->phy_dev;
+ unsigned long flags;
+ int status_change = 0;
+
+ spin_lock_irqsave(&ag->lock, flags);
+
+ if (phydev->link) {
+ if (ag->duplex != phydev->duplex
+ || ag->speed != phydev->speed) {
+ status_change = 1;
+ }
+ }
+
+ if (phydev->link != ag->link)
+ status_change = 1;
+
+ ag->link = phydev->link;
+ ag->duplex = phydev->duplex;
+ ag->speed = phydev->speed;
+
+ if (status_change)
+ ag71xx_link_adjust(ag);
+
+ spin_unlock_irqrestore(&ag->lock, flags);
+}
+
+int ag71xx_phy_connect(struct ag71xx *ag)
+{
+ struct device_node *np = ag->pdev->dev.of_node;
+ struct device_node *phy_node;
+ int ret;
+
+ if (of_phy_is_fixed_link(np)) {
+ ret = of_phy_register_fixed_link(np);
+ if (ret < 0) {
+ dev_err(&ag->pdev->dev,
+ "Failed to register fixed PHY link: %d\n", ret);
+ return ret;
+ }
+
+ phy_node = of_node_get(np);
+ } else {
+ phy_node = of_parse_phandle(np, "phy-handle", 0);
+ }
+
+ if (!phy_node) {
+ dev_err(&ag->pdev->dev,
+ "Could not find valid phy node\n");
+ return -ENODEV;
+ }
+
+ ag->phy_dev = of_phy_connect(ag->dev, phy_node, ag71xx_phy_link_adjust,
+ 0, ag->phy_if_mode);
+
+ of_node_put(phy_node);
+
+ if (!ag->phy_dev) {
+ dev_err(&ag->pdev->dev,
+ "Could not connect to PHY device. Deferring probe.\n");
+ return -EPROBE_DEFER;
+ }
+
+ dev_info(&ag->pdev->dev, "connected to PHY at %s [uid=%08x, driver=%s]\n",
+ phydev_name(ag->phy_dev),
+ ag->phy_dev->phy_id, ag->phy_dev->drv->name);
+
+ return 0;
+}
+
+void ag71xx_phy_disconnect(struct ag71xx *ag)
+{
+ phy_disconnect(ag->phy_dev);
+}
+++ /dev/null
-From 2cee757eaf5cc6175bc0ac7b0b808794124ec40a Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Mon, 17 Feb 2020 23:40:14 +0100
-Subject: [PATCH 1/3] ag71xx: Handle allocation errors in ag71xx_rings_init()
-
-Free the allocated resources in ag71xx_rings_init() in case
-ag71xx_ring_rx_init() returns an error.
-
-This is only a potential problem, I did not ran into this one.
-
-Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
-Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
----
- drivers/net/ethernet/atheros/ag71xx.c | 22 ++++++++++++++++++----
- 1 file changed, 18 insertions(+), 4 deletions(-)
-
---- a/drivers/net/ethernet/atheros/ag71xx.c
-+++ b/drivers/net/ethernet/atheros/ag71xx.c
-@@ -1133,6 +1133,7 @@ static int ag71xx_rings_init(struct ag71
- struct ag71xx_ring *tx = &ag->tx_ring;
- struct ag71xx_ring *rx = &ag->rx_ring;
- int ring_size, tx_size;
-+ int ret;
-
- ring_size = BIT(tx->order) + BIT(rx->order);
- tx_size = BIT(tx->order);
-@@ -1145,9 +1146,8 @@ static int ag71xx_rings_init(struct ag71
- ring_size * AG71XX_DESC_SIZE,
- &tx->descs_dma, GFP_KERNEL);
- if (!tx->descs_cpu) {
-- kfree(tx->buf);
-- tx->buf = NULL;
-- return -ENOMEM;
-+ ret = -ENOMEM;
-+ goto err_free_buf;
- }
-
- rx->buf = &tx->buf[tx_size];
-@@ -1155,7 +1155,21 @@ static int ag71xx_rings_init(struct ag71
- rx->descs_dma = tx->descs_dma + tx_size * AG71XX_DESC_SIZE;
-
- ag71xx_ring_tx_init(ag);
-- return ag71xx_ring_rx_init(ag);
-+ ret = ag71xx_ring_rx_init(ag);
-+ if (ret)
-+ goto err_free_dma;
-+
-+ return 0;
-+
-+err_free_dma:
-+ dma_free_coherent(&ag->pdev->dev, ring_size * AG71XX_DESC_SIZE,
-+ tx->descs_cpu, tx->descs_dma);
-+ rx->buf = NULL;
-+err_free_buf:
-+ kfree(tx->buf);
-+ tx->buf = NULL;
-+
-+ return ret;
- }
-
- static void ag71xx_rings_free(struct ag71xx *ag)
+++ /dev/null
-From 2f8c5a68d0030ae5e65fca1bf5ca44929d5b3b06 Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Mon, 17 Feb 2020 23:50:23 +0100
-Subject: [PATCH 2/3] ag71xx: Call ag71xx_hw_disable() in case phy_conenct
- fails
-
-When the ag71xx_phy_connect() failed only parts of the actions done
-previously in this function wrere reverted, because only
-ag71xx_rings_cleanup() was called. My system crashed the next time
-open() was called because napi_disable() was not called again and this
-resulted in two calls to napi_enable(), which is not allowed.
-
-Fix this by disabling the device again.
-
-Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
-Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
----
- drivers/net/ethernet/atheros/ag71xx.c | 8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
-
---- a/drivers/net/ethernet/atheros/ag71xx.c
-+++ b/drivers/net/ethernet/atheros/ag71xx.c
-@@ -1263,18 +1263,18 @@ static int ag71xx_open(struct net_device
-
- ret = ag71xx_hw_enable(ag);
- if (ret)
-- goto err;
-+ return ret;
-
- ret = ag71xx_phy_connect(ag);
- if (ret)
-- goto err;
-+ goto err_hw_disable;
-
- phy_start(ndev->phydev);
-
- return 0;
-
--err:
-- ag71xx_rings_cleanup(ag);
-+err_hw_disable:
-+ ag71xx_hw_disable(ag);
- return ret;
- }
-
+++ /dev/null
-From d42c6bf2752a46bdf3931bd6e56db419742fbb20 Mon Sep 17 00:00:00 2001
-From: Hauke Mehrtens <hauke@hauke-m.de>
-Date: Mon, 17 Feb 2020 23:55:22 +0100
-Subject: [PATCH 3/3] ag71xx: Run ag71xx_link_adjust() only when needed
-
-My system printed this line every second:
- ag71xx 19000000.eth eth0: Link is Up - 1Gbps/Full - flow control off
-The function ag71xx_phy_link_adjust() was called by the PHY layer every
-second even when nothing changed.
-
-With this patch the old status is stored and the real
-ag71xx_link_adjust() function is only called when when something really
-changed. This way the update and also this print is only done once any
-more.
-
-Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
-Fixes: d51b6ce441d3 ("net: ethernet: add ag71xx driver")
----
- drivers/net/ethernet/atheros/ag71xx.c | 24 +++++++++++++++++++++++-
- 1 file changed, 23 insertions(+), 1 deletion(-)
-
---- a/drivers/net/ethernet/atheros/ag71xx.c
-+++ b/drivers/net/ethernet/atheros/ag71xx.c
-@@ -307,6 +307,10 @@ struct ag71xx {
- u32 msg_enable;
- const struct ag71xx_dcfg *dcfg;
-
-+ unsigned int link;
-+ unsigned int speed;
-+ int duplex;
-+
- /* From this point onwards we're not looking at per-packet fields. */
- void __iomem *mac_base;
-
-@@ -854,6 +858,7 @@ static void ag71xx_link_adjust(struct ag
-
- if (!phydev->link && update) {
- ag71xx_hw_stop(ag);
-+ phy_print_status(phydev);
- return;
- }
-
-@@ -907,8 +912,25 @@ static void ag71xx_link_adjust(struct ag
- static void ag71xx_phy_link_adjust(struct net_device *ndev)
- {
- struct ag71xx *ag = netdev_priv(ndev);
-+ struct phy_device *phydev = ndev->phydev;
-+ int status_change = 0;
-+
-+ if (phydev->link) {
-+ if (ag->duplex != phydev->duplex
-+ || ag->speed != phydev->speed) {
-+ status_change = 1;
-+ }
-+ }
-+
-+ if (phydev->link != ag->link)
-+ status_change = 1;
-+
-+ ag->link = phydev->link;
-+ ag->duplex = phydev->duplex;
-+ ag->speed = phydev->speed;
-
-- ag71xx_link_adjust(ag, true);
-+ if (status_change)
-+ ag71xx_link_adjust(ag, true);
- }
-
- static int ag71xx_phy_connect(struct ag71xx *ag)
--- /dev/null
+--- a/drivers/net/ethernet/atheros/Kconfig
++++ b/drivers/net/ethernet/atheros/Kconfig
+@@ -17,13 +17,7 @@ config NET_VENDOR_ATHEROS
+
+ if NET_VENDOR_ATHEROS
+
+-config AG71XX
+- tristate "Atheros AR7XXX/AR9XXX built-in ethernet mac support"
+- depends on ATH79
+- select PHYLIB
+- help
+- If you wish to compile a kernel for AR7XXX/91XXX and enable
+- ethernet support, then you should always answer Y to this.
++source "drivers/net/ethernet/atheros/ag71xx/Kconfig"
+
+ config ATL2
+ tristate "Atheros L2 Fast Ethernet support"
+--- a/drivers/net/ethernet/atheros/Makefile
++++ b/drivers/net/ethernet/atheros/Makefile
+@@ -3,7 +3,7 @@
+ # Makefile for the Atheros network device drivers.
+ #
+
+-obj-$(CONFIG_AG71XX) += ag71xx.o
++obj-$(CONFIG_AG71XX) += ag71xx/
+ obj-$(CONFIG_ATL1) += atlx/
+ obj-$(CONFIG_ATL2) += atlx/
+ obj-$(CONFIG_ATL1E) += atl1e/
projects / openwrt / staging / stintel.git / commitdiff