+++ /dev/null
-/*
- * SPI driver for the Vitesse VSC7385 ethernet switch
- *
- * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
- *
- * Parts of this file are based on Atheros' 2.6.15 BSP
- *
- * 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/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/bitops.h>
-#include <linux/firmware.h>
-#include <linux/spi/spi.h>
-#include <linux/spi/vsc7385.h>
-
-#define DRV_NAME "spi-vsc7385"
-#define DRV_DESC "Vitesse VSC7385 Gbit ethernet switch driver"
-#define DRV_VERSION "0.1.0"
-
-#define VSC73XX_BLOCK_MAC 0x1
-#define VSC73XX_BLOCK_2 0x2
-#define VSC73XX_BLOCK_MII 0x3
-#define VSC73XX_BLOCK_4 0x4
-#define VSC73XX_BLOCK_5 0x5
-#define VSC73XX_BLOCK_SYSTEM 0x7
-
-#define VSC73XX_SUBBLOCK_PORT_0 0
-#define VSC73XX_SUBBLOCK_PORT_1 1
-#define VSC73XX_SUBBLOCK_PORT_2 2
-#define VSC73XX_SUBBLOCK_PORT_3 3
-#define VSC73XX_SUBBLOCK_PORT_4 4
-#define VSC73XX_SUBBLOCK_PORT_MAC 6
-
-/* MAC Block registers */
-#define VSC73XX_MAC_CFG 0x0
-#define VSC73XX_ADVPORTM 0x19
-#define VSC73XX_RXOCT 0x50
-#define VSC73XX_TXOCT 0x51
-#define VSC73XX_C_RX0 0x52
-#define VSC73XX_C_RX1 0x53
-#define VSC73XX_C_RX2 0x54
-#define VSC73XX_C_TX0 0x55
-#define VSC73XX_C_TX1 0x56
-#define VSC73XX_C_TX2 0x57
-#define VSC73XX_C_CFG 0x58
-
-/* MAC_CFG register bits */
-#define VSC73XX_MAC_CFG_WEXC_DIS (1 << 31)
-#define VSC73XX_MAC_CFG_PORT_RST (1 << 29)
-#define VSC73XX_MAC_CFG_TX_EN (1 << 28)
-#define VSC73XX_MAC_CFG_SEED_LOAD (1 << 27)
-#define VSC73XX_MAC_CFG_FDX (1 << 18)
-#define VSC73XX_MAC_CFG_GIGE (1 << 17)
-#define VSC73XX_MAC_CFG_RX_EN (1 << 16)
-#define VSC73XX_MAC_CFG_VLAN_DBLAWR (1 << 15)
-#define VSC73XX_MAC_CFG_VLAN_AWR (1 << 14)
-#define VSC73XX_MAC_CFG_100_BASE_T (1 << 13)
-#define VSC73XX_MAC_CFG_TX_IPG(x) (((x) & 0x1f) << 6)
-#define VSC73XX_MAC_CFG_MAC_RX_RST (1 << 5)
-#define VSC73XX_MAC_CFG_MAC_TX_RST (1 << 4)
-#define VSC73XX_MAC_CFG_BIT2 (1 << 2)
-#define VSC73XX_MAC_CFG_CLK_SEL(x) ((x) & 0x3)
-
-/* ADVPORTM register bits */
-#define VSC73XX_ADVPORTM_IFG_PPM (1 << 7)
-#define VSC73XX_ADVPORTM_EXC_COL_CONT (1 << 6)
-#define VSC73XX_ADVPORTM_EXT_PORT (1 << 5)
-#define VSC73XX_ADVPORTM_INV_GTX (1 << 4)
-#define VSC73XX_ADVPORTM_ENA_GTX (1 << 3)
-#define VSC73XX_ADVPORTM_DDR_MODE (1 << 2)
-#define VSC73XX_ADVPORTM_IO_LOOPBACK (1 << 1)
-#define VSC73XX_ADVPORTM_HOST_LOOPBACK (1 << 0)
-
-/* MII Block registers */
-#define VSC73XX_MII_STAT 0x0
-#define VSC73XX_MII_CMD 0x1
-#define VSC73XX_MII_DATA 0x2
-
-/* System Block registers */
-#define VSC73XX_ICPU_SIPAD 0x01
-#define VSC73XX_ICPU_CLOCK_DELAY 0x05
-#define VSC73XX_ICPU_CTRL 0x10
-#define VSC73XX_ICPU_ADDR 0x11
-#define VSC73XX_ICPU_SRAM 0x12
-#define VSC73XX_ICPU_MBOX_VAL 0x15
-#define VSC73XX_ICPU_MBOX_SET 0x16
-#define VSC73XX_ICPU_MBOX_CLR 0x17
-#define VSC73XX_ICPU_CHIPID 0x18
-#define VSC73XX_ICPU_GPIO 0x34
-
-#define VSC73XX_ICPU_CTRL_CLK_DIV (1 << 8)
-#define VSC73XX_ICPU_CTRL_SRST_HOLD (1 << 7)
-#define VSC73XX_ICPU_CTRL_BOOT_EN (1 << 3)
-#define VSC73XX_ICPU_CTRL_EXT_ACC_EN (1 << 2)
-#define VSC73XX_ICPU_CTRL_CLK_EN (1 << 1)
-#define VSC73XX_ICPU_CTRL_SRST (1 << 0)
-
-#define VSC73XX_ICPU_CHIPID_ID_SHIFT 12
-#define VSC73XX_ICPU_CHIPID_ID_MASK 0xffff
-#define VSC73XX_ICPU_CHIPID_REV_SHIFT 28
-#define VSC73XX_ICPU_CHIPID_REV_MASK 0xf
-#define VSC73XX_ICPU_CHIPID_ID_7385 0x7385
-#define VSC73XX_ICPU_CHIPID_ID_7395 0x7395
-
-#define VSC73XX_CMD_MODE_READ 0
-#define VSC73XX_CMD_MODE_WRITE 1
-#define VSC73XX_CMD_MODE_SHIFT 4
-#define VSC73XX_CMD_BLOCK_SHIFT 5
-#define VSC73XX_CMD_BLOCK_MASK 0x7
-#define VSC73XX_CMD_SUBBLOCK_MASK 0xf
-
-#define VSC7385_CLOCK_DELAY ((3 << 4) | 3)
-#define VSC7385_CLOCK_DELAY_MASK ((3 << 4) | 3)
-
-#define VSC73XX_ICPU_CTRL_STOP (VSC73XX_ICPU_CTRL_SRST_HOLD | \
- VSC73XX_ICPU_CTRL_BOOT_EN | \
- VSC73XX_ICPU_CTRL_EXT_ACC_EN)
-
-#define VSC73XX_ICPU_CTRL_START (VSC73XX_ICPU_CTRL_CLK_DIV | \
- VSC73XX_ICPU_CTRL_BOOT_EN | \
- VSC73XX_ICPU_CTRL_CLK_EN | \
- VSC73XX_ICPU_CTRL_SRST)
-
-#define VSC7385_ADVPORTM_MASK (VSC73XX_ADVPORTM_IFG_PPM | \
- VSC73XX_ADVPORTM_EXC_COL_CONT | \
- VSC73XX_ADVPORTM_EXT_PORT | \
- VSC73XX_ADVPORTM_INV_GTX | \
- VSC73XX_ADVPORTM_ENA_GTX | \
- VSC73XX_ADVPORTM_DDR_MODE | \
- VSC73XX_ADVPORTM_IO_LOOPBACK | \
- VSC73XX_ADVPORTM_HOST_LOOPBACK)
-
-#define VSC7385_ADVPORTM_INIT (VSC73XX_ADVPORTM_EXT_PORT | \
- VSC73XX_ADVPORTM_ENA_GTX | \
- VSC73XX_ADVPORTM_DDR_MODE)
-
-#define VSC7385_MAC_CFG_RESET (VSC73XX_MAC_CFG_PORT_RST | \
- VSC73XX_MAC_CFG_MAC_RX_RST | \
- VSC73XX_MAC_CFG_MAC_TX_RST)
-
-#define VSC73XX_MAC_CFG_INIT (VSC73XX_MAC_CFG_TX_EN | \
- VSC73XX_MAC_CFG_FDX | \
- VSC73XX_MAC_CFG_GIGE | \
- VSC73XX_MAC_CFG_RX_EN)
-
-#define VSC73XX_RESET_DELAY 100
-
-struct vsc7385 {
- struct spi_device *spi;
- struct mutex lock;
- struct vsc7385_platform_data *pdata;
-};
-
-static int vsc7385_is_addr_valid(u8 block, u8 subblock)
-{
- switch (block) {
- case VSC73XX_BLOCK_MAC:
- switch (subblock) {
- case 0 ... 4:
- case 6:
- return 1;
- }
- break;
-
- case VSC73XX_BLOCK_2:
- case VSC73XX_BLOCK_SYSTEM:
- switch (subblock) {
- case 0:
- return 1;
- }
- break;
-
- case VSC73XX_BLOCK_MII:
- case VSC73XX_BLOCK_4:
- case VSC73XX_BLOCK_5:
- switch (subblock) {
- case 0 ... 1:
- return 1;
- }
- break;
- }
-
- return 0;
-}
-
-static inline u8 vsc7385_make_addr(u8 mode, u8 block, u8 subblock)
-{
- u8 ret;
-
- ret = (block & VSC73XX_CMD_BLOCK_MASK) << VSC73XX_CMD_BLOCK_SHIFT;
- ret |= (mode & 1) << VSC73XX_CMD_MODE_SHIFT;
- ret |= subblock & VSC73XX_CMD_SUBBLOCK_MASK;
-
- return ret;
-}
-
-static int vsc7385_read(struct vsc7385 *vsc, u8 block, u8 subblock, u8 reg,
- u32 *value)
-{
- u8 cmd[4];
- u8 buf[4];
- struct spi_transfer t[2];
- struct spi_message m;
- int err;
-
- if (!vsc7385_is_addr_valid(block, subblock))
- return -EINVAL;
-
- spi_message_init(&m);
-
- memset(&t, 0, sizeof(t));
-
- t[0].tx_buf = cmd;
- t[0].len = sizeof(cmd);
- spi_message_add_tail(&t[0], &m);
-
- t[1].rx_buf = buf;
- t[1].len = sizeof(buf);
- spi_message_add_tail(&t[1], &m);
-
- cmd[0] = vsc7385_make_addr(VSC73XX_CMD_MODE_READ, block, subblock);
- cmd[1] = reg;
- cmd[2] = 0;
- cmd[3] = 0;
-
- mutex_lock(&vsc->lock);
- err = spi_sync(vsc->spi, &m);
- mutex_unlock(&vsc->lock);
-
- if (err)
- return err;
-
- *value = (((u32) buf[0]) << 24) | (((u32) buf[1]) << 16) |
- (((u32) buf[2]) << 8) | ((u32) buf[3]);
-
- return 0;
-}
-
-
-static int vsc7385_write(struct vsc7385 *vsc, u8 block, u8 subblock, u8 reg,
- u32 value)
-{
- u8 cmd[2];
- u8 buf[4];
- struct spi_transfer t[2];
- struct spi_message m;
- int err;
-
- if (!vsc7385_is_addr_valid(block, subblock))
- return -EINVAL;
-
- spi_message_init(&m);
-
- memset(&t, 0, sizeof(t));
-
- t[0].tx_buf = cmd;
- t[0].len = sizeof(cmd);
- spi_message_add_tail(&t[0], &m);
-
- t[1].tx_buf = buf;
- t[1].len = sizeof(buf);
- spi_message_add_tail(&t[1], &m);
-
- cmd[0] = vsc7385_make_addr(VSC73XX_CMD_MODE_WRITE, block, subblock);
- cmd[1] = reg;
-
- buf[0] = (value >> 24) & 0xff;
- buf[1] = (value >> 16) & 0xff;
- buf[2] = (value >> 8) & 0xff;
- buf[3] = value & 0xff;
-
- mutex_lock(&vsc->lock);
- err = spi_sync(vsc->spi, &m);
- mutex_unlock(&vsc->lock);
-
- return err;
-}
-
-static inline int vsc7385_write_verify(struct vsc7385 *vsc, u8 block,
- u8 subblock, u8 reg, u32 value,
- u32 read_mask, u32 read_val)
-{
- struct spi_device *spi = vsc->spi;
- u32 t;
- int err;
-
- err = vsc7385_write(vsc, block, subblock, reg, value);
- if (err)
- return err;
-
- err = vsc7385_read(vsc, block, subblock, reg, &t);
- if (err)
- return err;
-
- if ((t & read_mask) != read_val) {
- dev_err(&spi->dev, "register write error\n");
- return -EIO;
- }
-
- return 0;
-}
-
-static inline int vsc7385_set_clock_delay(struct vsc7385 *vsc, u32 val)
-{
- return vsc7385_write(vsc, VSC73XX_BLOCK_SYSTEM, 0,
- VSC73XX_ICPU_CLOCK_DELAY, val);
-}
-
-static inline int vsc7385_get_clock_delay(struct vsc7385 *vsc, u32 *val)
-{
- return vsc7385_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
- VSC73XX_ICPU_CLOCK_DELAY, val);
-}
-
-static inline int vsc7385_icpu_stop(struct vsc7385 *vsc)
-{
- return vsc7385_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_ICPU_CTRL,
- VSC73XX_ICPU_CTRL_STOP);
-}
-
-static inline int vsc7385_icpu_start(struct vsc7385 *vsc)
-{
- return vsc7385_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_ICPU_CTRL,
- VSC73XX_ICPU_CTRL_START);
-}
-
-static inline int vsc7385_icpu_reset(struct vsc7385 *vsc)
-{
- int rc;
-
- rc = vsc7385_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_ICPU_ADDR,
- 0x0000);
- if (rc)
- dev_err(&vsc->spi->dev,
- "could not reset microcode, err=%d\n", rc);
-
- return rc;
-}
-
-static int vsc7385_upload_ucode(struct vsc7385 *vsc)
-{
- struct spi_device *spi = vsc->spi;
- const struct firmware *firmware;
- char *ucode_name;
- unsigned char *dp;
- unsigned int curVal;
- int i;
- int diffs;
- int rc;
-
- ucode_name = (vsc->pdata->ucode_name) ? vsc->pdata->ucode_name
- : "vsc7385_ucode.bin";
- rc = request_firmware(&firmware, ucode_name, &spi->dev);
- if (rc) {
- dev_err(&spi->dev, "request_firmware failed, err=%d\n",
- rc);
- return rc;
- }
-
- rc = vsc7385_icpu_stop(vsc);
- if (rc)
- goto out;
-
- rc = vsc7385_icpu_reset(vsc);
- if (rc)
- goto out;
-
- dev_info(&spi->dev, "uploading microcode...\n");
-
- dp = (unsigned char *) firmware->data;
- for (i = 0; i < firmware->size; i++) {
- rc = vsc7385_write(vsc, VSC73XX_BLOCK_SYSTEM, 0,
- VSC73XX_ICPU_SRAM, *dp++);
- if (rc) {
- dev_err(&spi->dev, "could not load microcode, err=%d\n",
- rc);
- goto out;
- }
- }
-
- rc = vsc7385_icpu_reset(vsc);
- if (rc)
- goto out;
-
- dev_info(&spi->dev, "verifying microcode...\n");
-
- dp = (unsigned char *) firmware->data;
- diffs = 0;
- for (i = 0; i < firmware->size; i++) {
- rc = vsc7385_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
- VSC73XX_ICPU_SRAM, &curVal);
- if (rc) {
- dev_err(&spi->dev, "could not read microcode %d\n",
- rc);
- goto out;
- }
-
- if (curVal > 0xff) {
- dev_err(&spi->dev, "bad val read: %04x : %02x %02x\n",
- i, *dp, curVal);
- rc = -EIO;
- goto out;
- }
-
- if ((curVal & 0xff) != *dp) {
- diffs++;
- dev_err(&spi->dev, "verify error: %04x : %02x %02x\n",
- i, *dp, curVal);
-
- if (diffs > 4)
- break;
- }
- dp++;
- }
-
- if (diffs) {
- dev_err(&spi->dev, "microcode verification failed\n");
- rc = -EIO;
- goto out;
- }
-
- dev_info(&spi->dev, "microcode uploaded\n");
-
- rc = vsc7385_icpu_start(vsc);
-
-out:
- release_firmware(firmware);
- return rc;
-}
-
-static int vsc7385_setup(struct vsc7385 *vsc)
-{
- struct vsc7385_platform_data *pdata = vsc->pdata;
- u32 t;
- int err;
-
- err = vsc7385_write_verify(vsc, VSC73XX_BLOCK_SYSTEM, 0,
- VSC73XX_ICPU_CLOCK_DELAY,
- VSC7385_CLOCK_DELAY,
- VSC7385_CLOCK_DELAY_MASK,
- VSC7385_CLOCK_DELAY);
- if (err)
- goto err;
-
- err = vsc7385_write_verify(vsc, VSC73XX_BLOCK_MAC,
- VSC73XX_SUBBLOCK_PORT_MAC, VSC73XX_ADVPORTM,
- VSC7385_ADVPORTM_INIT,
- VSC7385_ADVPORTM_MASK,
- VSC7385_ADVPORTM_INIT);
- if (err)
- goto err;
-
- err = vsc7385_write(vsc, VSC73XX_BLOCK_MAC, VSC73XX_SUBBLOCK_PORT_MAC,
- VSC73XX_MAC_CFG, VSC7385_MAC_CFG_RESET);
- if (err)
- goto err;
-
- t = VSC73XX_MAC_CFG_INIT;
- t |= VSC73XX_MAC_CFG_TX_IPG(pdata->mac_cfg.tx_ipg);
- t |= VSC73XX_MAC_CFG_CLK_SEL(pdata->mac_cfg.clk_sel);
- if (pdata->mac_cfg.bit2)
- t |= VSC73XX_MAC_CFG_BIT2;
-
- err = vsc7385_write(vsc, VSC73XX_BLOCK_MAC, VSC73XX_SUBBLOCK_PORT_MAC,
- VSC73XX_MAC_CFG, t);
- if (err)
- goto err;
-
- return 0;
-
-err:
- return err;
-}
-
-static int vsc7385_detect(struct vsc7385 *vsc)
-{
- struct spi_device *spi = vsc->spi;
- u32 t;
- u32 id;
- u32 rev;
- int err;
-
- err = vsc7385_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
- VSC73XX_ICPU_MBOX_VAL, &t);
- if (err) {
- dev_err(&spi->dev, "unable to read mailbox, err=%d\n", err);
- return err;
- }
-
- if (t == 0xffffffff) {
- dev_dbg(&spi->dev, "assert chip reset\n");
- if (vsc->pdata->reset)
- vsc->pdata->reset();
-
- }
-
- err = vsc7385_read(vsc, VSC73XX_BLOCK_SYSTEM, 0,
- VSC73XX_ICPU_CHIPID, &t);
- if (err) {
- dev_err(&spi->dev, "unable to read chip id, err=%d\n", err);
- return err;
- }
-
- id = (t >> VSC73XX_ICPU_CHIPID_ID_SHIFT) & VSC73XX_ICPU_CHIPID_ID_MASK;
- switch (id) {
- case VSC73XX_ICPU_CHIPID_ID_7385:
- case VSC73XX_ICPU_CHIPID_ID_7395:
- break;
- default:
- dev_err(&spi->dev, "unsupported chip, id=%04x\n", id);
- return -ENODEV;
- }
-
- rev = (t >> VSC73XX_ICPU_CHIPID_REV_SHIFT) &
- VSC73XX_ICPU_CHIPID_REV_MASK;
- dev_info(&spi->dev, "VSC%04X (rev. %d) switch found\n", id, rev);
-
- return 0;
-}
-
-static int vsc7385_probe(struct spi_device *spi)
-{
- struct vsc7385 *vsc;
- struct vsc7385_platform_data *pdata;
- int err;
-
- printk(KERN_INFO DRV_DESC " version " DRV_VERSION"\n");
-
- pdata = spi->dev.platform_data;
- if (!pdata) {
- dev_err(&spi->dev, "no platform data specified\n");
- return -ENODEV;
- }
-
- vsc = kzalloc(sizeof(*vsc), GFP_KERNEL);
- if (!vsc) {
- dev_err(&spi->dev, "no memory for private data\n");
- return -ENOMEM;
- }
-
- mutex_init(&vsc->lock);
- vsc->pdata = pdata;
- vsc->spi = spi_dev_get(spi);
- dev_set_drvdata(&spi->dev, vsc);
-
- spi->mode = SPI_MODE_0;
- spi->bits_per_word = 8;
- err = spi_setup(spi);
- if (err) {
- dev_err(&spi->dev, "spi_setup failed, err=%d\n", err);
- goto err_drvdata;
- }
-
- err = vsc7385_detect(vsc);
- if (err) {
- dev_err(&spi->dev, "no chip found, err=%d\n", err);
- goto err_drvdata;
- }
-
- err = vsc7385_upload_ucode(vsc);
- if (err)
- goto err_drvdata;
-
- err = vsc7385_setup(vsc);
- if (err)
- goto err_drvdata;
-
- return 0;
-
-err_drvdata:
- dev_set_drvdata(&spi->dev, NULL);
- kfree(vsc);
- return err;
-}
-
-static int vsc7385_remove(struct spi_device *spi)
-{
- struct vsc7385_data *vsc;
-
- vsc = dev_get_drvdata(&spi->dev);
- dev_set_drvdata(&spi->dev, NULL);
- kfree(vsc);
-
- return 0;
-}
-
-static struct spi_driver vsc7385_driver = {
- .driver = {
- .name = DRV_NAME,
- .bus = &spi_bus_type,
- .owner = THIS_MODULE,
- },
- .probe = vsc7385_probe,
- .remove = vsc7385_remove,
-};
-
-static int __init vsc7385_init(void)
-{
- return spi_register_driver(&vsc7385_driver);
-}
-module_init(vsc7385_init);
-
-static void __exit vsc7385_exit(void)
-{
- spi_unregister_driver(&vsc7385_driver);
-}
-module_exit(vsc7385_exit);
-
-MODULE_DESCRIPTION(DRV_DESC);
-MODULE_VERSION(DRV_VERSION);
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_LICENSE("GPL v2");
-
projects / openwrt / staging / chunkeey.git / blobdiff