+++ /dev/null
-/*
- * Driver for the built-in NAND controller of the Atheros AR934x SoCs
- *
- * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
- *
- * 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/version.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/dma-mapping.h>
-#include <linux/mtd/mtd.h>
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0)
-#include <linux/mtd/nand.h>
-#else
-#include <linux/mtd/rawnand.h>
-#endif
-#include <linux/mtd/partitions.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-
-#include <linux/platform/ar934x_nfc.h>
-
-#define AR934X_NFC_REG_CMD 0x00
-#define AR934X_NFC_REG_CTRL 0x04
-#define AR934X_NFC_REG_STATUS 0x08
-#define AR934X_NFC_REG_INT_MASK 0x0c
-#define AR934X_NFC_REG_INT_STATUS 0x10
-#define AR934X_NFC_REG_ECC_CTRL 0x14
-#define AR934X_NFC_REG_ECC_OFFSET 0x18
-#define AR934X_NFC_REG_ADDR0_0 0x1c
-#define AR934X_NFC_REG_ADDR0_1 0x24
-#define AR934X_NFC_REG_ADDR1_0 0x20
-#define AR934X_NFC_REG_ADDR1_1 0x28
-#define AR934X_NFC_REG_SPARE_SIZE 0x30
-#define AR934X_NFC_REG_PROTECT 0x38
-#define AR934X_NFC_REG_LOOKUP_EN 0x40
-#define AR934X_NFC_REG_LOOKUP(_x) (0x44 + (_i) * 4)
-#define AR934X_NFC_REG_DMA_ADDR 0x64
-#define AR934X_NFC_REG_DMA_COUNT 0x68
-#define AR934X_NFC_REG_DMA_CTRL 0x6c
-#define AR934X_NFC_REG_MEM_CTRL 0x80
-#define AR934X_NFC_REG_DATA_SIZE 0x84
-#define AR934X_NFC_REG_READ_STATUS 0x88
-#define AR934X_NFC_REG_TIME_SEQ 0x8c
-#define AR934X_NFC_REG_TIMINGS_ASYN 0x90
-#define AR934X_NFC_REG_TIMINGS_SYN 0x94
-#define AR934X_NFC_REG_FIFO_DATA 0x98
-#define AR934X_NFC_REG_TIME_MODE 0x9c
-#define AR934X_NFC_REG_DMA_ADDR_OFFS 0xa0
-#define AR934X_NFC_REG_FIFO_INIT 0xb0
-#define AR934X_NFC_REG_GEN_SEQ_CTRL 0xb4
-
-#define AR934X_NFC_CMD_CMD_SEQ_S 0
-#define AR934X_NFC_CMD_CMD_SEQ_M 0x3f
-#define AR934X_NFC_CMD_SEQ_1C 0x00
-#define AR934X_NFC_CMD_SEQ_ERASE 0x0e
-#define AR934X_NFC_CMD_SEQ_12 0x0c
-#define AR934X_NFC_CMD_SEQ_1C1AXR 0x21
-#define AR934X_NFC_CMD_SEQ_S 0x24
-#define AR934X_NFC_CMD_SEQ_1C3AXR 0x27
-#define AR934X_NFC_CMD_SEQ_1C5A1CXR 0x2a
-#define AR934X_NFC_CMD_SEQ_18 0x32
-#define AR934X_NFC_CMD_INPUT_SEL_SIU 0
-#define AR934X_NFC_CMD_INPUT_SEL_DMA BIT(6)
-#define AR934X_NFC_CMD_ADDR_SEL_0 0
-#define AR934X_NFC_CMD_ADDR_SEL_1 BIT(7)
-#define AR934X_NFC_CMD_CMD0_S 8
-#define AR934X_NFC_CMD_CMD0_M 0xff
-#define AR934X_NFC_CMD_CMD1_S 16
-#define AR934X_NFC_CMD_CMD1_M 0xff
-#define AR934X_NFC_CMD_CMD2_S 24
-#define AR934X_NFC_CMD_CMD2_M 0xff
-
-#define AR934X_NFC_CTRL_ADDR_CYCLE0_M 0x7
-#define AR934X_NFC_CTRL_ADDR_CYCLE0_S 0
-#define AR934X_NFC_CTRL_SPARE_EN BIT(3)
-#define AR934X_NFC_CTRL_INT_EN BIT(4)
-#define AR934X_NFC_CTRL_ECC_EN BIT(5)
-#define AR934X_NFC_CTRL_BLOCK_SIZE_S 6
-#define AR934X_NFC_CTRL_BLOCK_SIZE_M 0x3
-#define AR934X_NFC_CTRL_BLOCK_SIZE_32 0
-#define AR934X_NFC_CTRL_BLOCK_SIZE_64 1
-#define AR934X_NFC_CTRL_BLOCK_SIZE_128 2
-#define AR934X_NFC_CTRL_BLOCK_SIZE_256 3
-#define AR934X_NFC_CTRL_PAGE_SIZE_S 8
-#define AR934X_NFC_CTRL_PAGE_SIZE_M 0x7
-#define AR934X_NFC_CTRL_PAGE_SIZE_256 0
-#define AR934X_NFC_CTRL_PAGE_SIZE_512 1
-#define AR934X_NFC_CTRL_PAGE_SIZE_1024 2
-#define AR934X_NFC_CTRL_PAGE_SIZE_2048 3
-#define AR934X_NFC_CTRL_PAGE_SIZE_4096 4
-#define AR934X_NFC_CTRL_PAGE_SIZE_8192 5
-#define AR934X_NFC_CTRL_PAGE_SIZE_16384 6
-#define AR934X_NFC_CTRL_CUSTOM_SIZE_EN BIT(11)
-#define AR934X_NFC_CTRL_IO_WIDTH_8BITS 0
-#define AR934X_NFC_CTRL_IO_WIDTH_16BITS BIT(12)
-#define AR934X_NFC_CTRL_LOOKUP_EN BIT(13)
-#define AR934X_NFC_CTRL_PROT_EN BIT(14)
-#define AR934X_NFC_CTRL_WORK_MODE_ASYNC 0
-#define AR934X_NFC_CTRL_WORK_MODE_SYNC BIT(15)
-#define AR934X_NFC_CTRL_ADDR0_AUTO_INC BIT(16)
-#define AR934X_NFC_CTRL_ADDR1_AUTO_INC BIT(17)
-#define AR934X_NFC_CTRL_ADDR_CYCLE1_M 0x7
-#define AR934X_NFC_CTRL_ADDR_CYCLE1_S 18
-#define AR934X_NFC_CTRL_SMALL_PAGE BIT(21)
-
-#define AR934X_NFC_DMA_CTRL_DMA_START BIT(7)
-#define AR934X_NFC_DMA_CTRL_DMA_DIR_WRITE 0
-#define AR934X_NFC_DMA_CTRL_DMA_DIR_READ BIT(6)
-#define AR934X_NFC_DMA_CTRL_DMA_MODE_SG BIT(5)
-#define AR934X_NFC_DMA_CTRL_DMA_BURST_S 2
-#define AR934X_NFC_DMA_CTRL_DMA_BURST_0 0
-#define AR934X_NFC_DMA_CTRL_DMA_BURST_1 1
-#define AR934X_NFC_DMA_CTRL_DMA_BURST_2 2
-#define AR934X_NFC_DMA_CTRL_DMA_BURST_3 3
-#define AR934X_NFC_DMA_CTRL_DMA_BURST_4 4
-#define AR934X_NFC_DMA_CTRL_DMA_BURST_5 5
-#define AR934X_NFC_DMA_CTRL_ERR_FLAG BIT(1)
-#define AR934X_NFC_DMA_CTRL_DMA_READY BIT(0)
-
-#define AR934X_NFC_INT_DEV_RDY(_x) BIT(4 + (_x))
-#define AR934X_NFC_INT_CMD_END BIT(1)
-
-#define AR934X_NFC_ECC_CTRL_ERR_THRES_S 8
-#define AR934X_NFC_ECC_CTRL_ERR_THRES_M 0x1f
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_S 5
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_M 0x7
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_2 0
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_4 1
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_6 2
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_8 3
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_10 4
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_12 5
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_14 6
-#define AR934X_NFC_ECC_CTRL_ECC_CAP_16 7
-#define AR934X_NFC_ECC_CTRL_ERR_OVER BIT(2)
-#define AR934X_NFC_ECC_CTRL_ERR_UNCORRECT BIT(1)
-#define AR934X_NFC_ECC_CTRL_ERR_CORRECT BIT(0)
-
-#define AR934X_NFC_ECC_OFFS_OFSET_M 0xffff
-
-/* default timing values */
-#define AR934X_NFC_TIME_SEQ_DEFAULT 0x7fff
-#define AR934X_NFC_TIMINGS_ASYN_DEFAULT 0x22
-#define AR934X_NFC_TIMINGS_SYN_DEFAULT 0xf
-
-#define AR934X_NFC_ID_BUF_SIZE 8
-#define AR934X_NFC_DEV_READY_TIMEOUT 25 /* msecs */
-#define AR934X_NFC_DMA_READY_TIMEOUT 25 /* msecs */
-#define AR934X_NFC_DONE_TIMEOUT 1000
-#define AR934X_NFC_DMA_RETRIES 20
-
-#define AR934X_NFC_USE_IRQ true
-#define AR934X_NFC_IRQ_MASK AR934X_NFC_INT_DEV_RDY(0)
-
-#define AR934X_NFC_GENSEQ_SMALL_PAGE_READ 0x30043
-
-#undef AR934X_NFC_DEBUG_DATA
-#undef AR934X_NFC_DEBUG
-
-struct ar934x_nfc;
-
-static inline __attribute__ ((format (printf, 2, 3)))
-void _nfc_dbg(struct ar934x_nfc *nfc, const char *fmt, ...)
-{
-}
-
-#ifdef AR934X_NFC_DEBUG
-#define nfc_dbg(_nfc, fmt, ...) \
- dev_info((_nfc)->parent, fmt, ##__VA_ARGS__)
-#else
-#define nfc_dbg(_nfc, fmt, ...) \
- _nfc_dbg((_nfc), fmt, ##__VA_ARGS__)
-#endif /* AR934X_NFC_DEBUG */
-
-#ifdef AR934X_NFC_DEBUG_DATA
-static void
-nfc_debug_data(const char *label, void *data, int len)
-{
- print_hex_dump(KERN_WARNING, label, DUMP_PREFIX_OFFSET, 16, 1,
- data, len, 0);
-}
-#else
-static inline void
-nfc_debug_data(const char *label, void *data, int len) {}
-#endif /* AR934X_NFC_DEBUG_DATA */
-
-struct ar934x_nfc {
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
- struct mtd_info mtd;
-#endif
- struct nand_chip nand_chip;
- struct device *parent;
- void __iomem *base;
- void (*select_chip)(int chip_no);
- bool swap_dma;
- int irq;
- wait_queue_head_t irq_waitq;
-
- bool spurious_irq_expected;
- u32 irq_status;
-
- u32 ctrl_reg;
- u32 ecc_ctrl_reg;
- u32 ecc_offset_reg;
- u32 ecc_thres;
- u32 ecc_oob_pos;
-
- bool small_page;
- unsigned int addr_count0;
- unsigned int addr_count1;
-
- u8 *buf;
- dma_addr_t buf_dma;
- unsigned int buf_size;
- int buf_index;
-
- bool read_id;
-
- int erase1_page_addr;
-
- int rndout_page_addr;
- int rndout_read_cmd;
-
- int seqin_page_addr;
- int seqin_column;
- int seqin_read_cmd;
-};
-
-static void ar934x_nfc_restart(struct ar934x_nfc *nfc);
-
-static inline bool
-is_all_ff(u8 *buf, int len)
-{
- while (len--)
- if (buf[len] != 0xff)
- return false;
-
- return true;
-}
-
-static inline void
-ar934x_nfc_wr(struct ar934x_nfc *nfc, unsigned reg, u32 val)
-{
- __raw_writel(val, nfc->base + reg);
-}
-
-static inline u32
-ar934x_nfc_rr(struct ar934x_nfc *nfc, unsigned reg)
-{
- return __raw_readl(nfc->base + reg);
-}
-
-static inline struct ar934x_nfc_platform_data *
-ar934x_nfc_get_platform_data(struct ar934x_nfc *nfc)
-{
- return nfc->parent->platform_data;
-}
-
-static inline struct
-ar934x_nfc *mtd_to_ar934x_nfc(struct mtd_info *mtd)
-{
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
- return container_of(mtd, struct ar934x_nfc, mtd);
-#else
- struct nand_chip *chip = mtd_to_nand(mtd);
-
- return container_of(chip, struct ar934x_nfc, nand_chip);
-#endif
-}
-
-static struct mtd_info *ar934x_nfc_to_mtd(struct ar934x_nfc *nfc)
-{
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
- return &nfc->mtd;
-#else
- return nand_to_mtd(&nfc->nand_chip);
-#endif
-}
-
-static inline bool ar934x_nfc_use_irq(struct ar934x_nfc *nfc)
-{
- return AR934X_NFC_USE_IRQ;
-}
-
-static inline void ar934x_nfc_write_cmd_reg(struct ar934x_nfc *nfc, u32 cmd_reg)
-{
- wmb();
-
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_CMD, cmd_reg);
- /* flush write */
- ar934x_nfc_rr(nfc, AR934X_NFC_REG_CMD);
-}
-
-static bool
-__ar934x_nfc_dev_ready(struct ar934x_nfc *nfc)
-{
- u32 status;
-
- status = ar934x_nfc_rr(nfc, AR934X_NFC_REG_STATUS);
- return (status & 0xff) == 0xff;
-}
-
-static inline bool
-__ar934x_nfc_is_dma_ready(struct ar934x_nfc *nfc)
-{
- u32 status;
-
- status = ar934x_nfc_rr(nfc, AR934X_NFC_REG_DMA_CTRL);
- return (status & AR934X_NFC_DMA_CTRL_DMA_READY) != 0;
-}
-
-static int
-ar934x_nfc_wait_dev_ready(struct ar934x_nfc *nfc)
-{
- unsigned long timeout;
-
- timeout = jiffies + msecs_to_jiffies(AR934X_NFC_DEV_READY_TIMEOUT);
- do {
- if (__ar934x_nfc_dev_ready(nfc))
- return 0;
- } while time_before(jiffies, timeout);
-
- nfc_dbg(nfc, "timeout waiting for device ready, status:%08x int:%08x\n",
- ar934x_nfc_rr(nfc, AR934X_NFC_REG_STATUS),
- ar934x_nfc_rr(nfc, AR934X_NFC_REG_INT_STATUS));
- return -ETIMEDOUT;
-}
-
-static int
-ar934x_nfc_wait_dma_ready(struct ar934x_nfc *nfc)
-{
- unsigned long timeout;
-
- timeout = jiffies + msecs_to_jiffies(AR934X_NFC_DMA_READY_TIMEOUT);
- do {
- if (__ar934x_nfc_is_dma_ready(nfc))
- return 0;
- } while time_before(jiffies, timeout);
-
- nfc_dbg(nfc, "timeout waiting for DMA ready, dma_ctrl:%08x\n",
- ar934x_nfc_rr(nfc, AR934X_NFC_REG_DMA_CTRL));
- return -ETIMEDOUT;
-}
-
-static int
-ar934x_nfc_wait_irq(struct ar934x_nfc *nfc)
-{
- long timeout;
- int ret;
-
- timeout = wait_event_timeout(nfc->irq_waitq,
- (nfc->irq_status & AR934X_NFC_IRQ_MASK) != 0,
- msecs_to_jiffies(AR934X_NFC_DEV_READY_TIMEOUT));
-
- ret = 0;
- if (!timeout) {
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_INT_MASK, 0);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_INT_STATUS, 0);
- /* flush write */
- ar934x_nfc_rr(nfc, AR934X_NFC_REG_INT_STATUS);
-
- nfc_dbg(nfc,
- "timeout waiting for interrupt, status:%08x\n",
- nfc->irq_status);
- ret = -ETIMEDOUT;
- }
-
- nfc->irq_status = 0;
- return ret;
-}
-
-static int
-ar934x_nfc_wait_done(struct ar934x_nfc *nfc)
-{
- int ret;
-
- if (ar934x_nfc_use_irq(nfc))
- ret = ar934x_nfc_wait_irq(nfc);
- else
- ret = ar934x_nfc_wait_dev_ready(nfc);
-
- if (ret)
- return ret;
-
- return ar934x_nfc_wait_dma_ready(nfc);
-}
-
-static int
-ar934x_nfc_alloc_buf(struct ar934x_nfc *nfc, unsigned size)
-{
- nfc->buf = dma_alloc_coherent(nfc->parent, size,
- &nfc->buf_dma, GFP_KERNEL);
- if (nfc->buf == NULL) {
- dev_err(nfc->parent, "no memory for DMA buffer\n");
- return -ENOMEM;
- }
-
- nfc->buf_size = size;
- nfc_dbg(nfc, "buf:%p size:%u\n", nfc->buf, nfc->buf_size);
-
- return 0;
-}
-
-static void
-ar934x_nfc_free_buf(struct ar934x_nfc *nfc)
-{
- dma_free_coherent(nfc->parent, nfc->buf_size, nfc->buf, nfc->buf_dma);
-}
-
-static void
-ar934x_nfc_get_addr(struct ar934x_nfc *nfc, int column, int page_addr,
- u32 *addr0, u32 *addr1)
-{
- u32 a0, a1;
-
- a0 = 0;
- a1 = 0;
-
- if (column == -1) {
- /* ERASE1 */
- a0 = (page_addr & 0xffff) << 16;
- a1 = (page_addr >> 16) & 0xf;
- } else if (page_addr != -1) {
- /* SEQIN, READ0, etc.. */
-
- /* TODO: handle 16bit bus width */
- if (nfc->small_page) {
- a0 = column & 0xff;
- a0 |= (page_addr & 0xff) << 8;
- a0 |= ((page_addr >> 8) & 0xff) << 16;
- a0 |= ((page_addr >> 16) & 0xff) << 24;
- } else {
- a0 = column & 0x0FFF;
- a0 |= (page_addr & 0xffff) << 16;
-
- if (nfc->addr_count0 > 4)
- a1 = (page_addr >> 16) & 0xf;
- }
- }
-
- *addr0 = a0;
- *addr1 = a1;
-}
-
-static void
-ar934x_nfc_send_cmd(struct ar934x_nfc *nfc, unsigned command)
-{
- u32 cmd_reg;
-
- cmd_reg = AR934X_NFC_CMD_INPUT_SEL_SIU | AR934X_NFC_CMD_ADDR_SEL_0 |
- AR934X_NFC_CMD_SEQ_1C;
- cmd_reg |= (command & AR934X_NFC_CMD_CMD0_M) << AR934X_NFC_CMD_CMD0_S;
-
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_INT_STATUS, 0);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_CTRL, nfc->ctrl_reg);
-
- ar934x_nfc_write_cmd_reg(nfc, cmd_reg);
- ar934x_nfc_wait_dev_ready(nfc);
-}
-
-static int
-ar934x_nfc_do_rw_command(struct ar934x_nfc *nfc, int column, int page_addr,
- int len, u32 cmd_reg, u32 ctrl_reg, bool write)
-{
- u32 addr0, addr1;
- u32 dma_ctrl;
- int dir;
- int err;
- int retries = 0;
-
- WARN_ON(len & 3);
-
- if (WARN_ON(len > nfc->buf_size))
- dev_err(nfc->parent, "len=%d > buf_size=%d", len, nfc->buf_size);
-
- if (write) {
- dma_ctrl = AR934X_NFC_DMA_CTRL_DMA_DIR_WRITE;
- dir = DMA_TO_DEVICE;
- } else {
- dma_ctrl = AR934X_NFC_DMA_CTRL_DMA_DIR_READ;
- dir = DMA_FROM_DEVICE;
- }
-
- ar934x_nfc_get_addr(nfc, column, page_addr, &addr0, &addr1);
-
- dma_ctrl |= AR934X_NFC_DMA_CTRL_DMA_START |
- (AR934X_NFC_DMA_CTRL_DMA_BURST_3 <<
- AR934X_NFC_DMA_CTRL_DMA_BURST_S);
-
- cmd_reg |= AR934X_NFC_CMD_INPUT_SEL_DMA | AR934X_NFC_CMD_ADDR_SEL_0;
- ctrl_reg |= AR934X_NFC_CTRL_INT_EN;
-
- nfc_dbg(nfc, "%s a0:%08x a1:%08x len:%x cmd:%08x dma:%08x ctrl:%08x\n",
- (write) ? "write" : "read",
- addr0, addr1, len, cmd_reg, dma_ctrl, ctrl_reg);
-
-retry:
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_INT_STATUS, 0);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_ADDR0_0, addr0);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_ADDR0_1, addr1);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_DMA_ADDR, nfc->buf_dma);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_DMA_COUNT, len);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_DATA_SIZE, len);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_CTRL, ctrl_reg);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_DMA_CTRL, dma_ctrl);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_ECC_CTRL, nfc->ecc_ctrl_reg);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_ECC_OFFSET, nfc->ecc_offset_reg);
-
- if (ar934x_nfc_use_irq(nfc)) {
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_INT_MASK, AR934X_NFC_IRQ_MASK);
- /* flush write */
- ar934x_nfc_rr(nfc, AR934X_NFC_REG_INT_MASK);
- }
-
- ar934x_nfc_write_cmd_reg(nfc, cmd_reg);
- err = ar934x_nfc_wait_done(nfc);
- if (err) {
- dev_dbg(nfc->parent, "%s operation stuck at page %d\n",
- (write) ? "write" : "read", page_addr);
-
- ar934x_nfc_restart(nfc);
- if (retries++ < AR934X_NFC_DMA_RETRIES)
- goto retry;
-
- dev_err(nfc->parent, "%s operation failed on page %d\n",
- (write) ? "write" : "read", page_addr);
- }
-
- return err;
-}
-
-static int
-ar934x_nfc_send_readid(struct ar934x_nfc *nfc, unsigned command)
-{
- u32 cmd_reg;
- int err;
-
- nfc_dbg(nfc, "readid, cmd:%02x\n", command);
-
- cmd_reg = AR934X_NFC_CMD_SEQ_1C1AXR;
- cmd_reg |= (command & AR934X_NFC_CMD_CMD0_M) << AR934X_NFC_CMD_CMD0_S;
-
- err = ar934x_nfc_do_rw_command(nfc, -1, -1, AR934X_NFC_ID_BUF_SIZE,
- cmd_reg, nfc->ctrl_reg, false);
-
- nfc_debug_data("[id] ", nfc->buf, AR934X_NFC_ID_BUF_SIZE);
-
- return err;
-}
-
-static int
-ar934x_nfc_send_read(struct ar934x_nfc *nfc, unsigned command, int column,
- int page_addr, int len)
-{
- u32 cmd_reg;
- int err;
-
- nfc_dbg(nfc, "read, column=%d page=%d len=%d\n",
- column, page_addr, len);
-
- cmd_reg = (command & AR934X_NFC_CMD_CMD0_M) << AR934X_NFC_CMD_CMD0_S;
-
- if (nfc->small_page) {
- cmd_reg |= AR934X_NFC_CMD_SEQ_18;
- } else {
- cmd_reg |= NAND_CMD_READSTART << AR934X_NFC_CMD_CMD1_S;
- cmd_reg |= AR934X_NFC_CMD_SEQ_1C5A1CXR;
- }
-
- err = ar934x_nfc_do_rw_command(nfc, column, page_addr, len,
- cmd_reg, nfc->ctrl_reg, false);
-
- nfc_debug_data("[data] ", nfc->buf, len);
-
- return err;
-}
-
-static void
-ar934x_nfc_send_erase(struct ar934x_nfc *nfc, unsigned command, int column,
- int page_addr)
-{
- u32 addr0, addr1;
- u32 ctrl_reg;
- u32 cmd_reg;
-
- ar934x_nfc_get_addr(nfc, column, page_addr, &addr0, &addr1);
-
- ctrl_reg = nfc->ctrl_reg;
- if (nfc->small_page) {
- /* override number of address cycles for the erase command */
- ctrl_reg &= ~(AR934X_NFC_CTRL_ADDR_CYCLE0_M <<
- AR934X_NFC_CTRL_ADDR_CYCLE0_S);
- ctrl_reg &= ~(AR934X_NFC_CTRL_ADDR_CYCLE1_M <<
- AR934X_NFC_CTRL_ADDR_CYCLE1_S);
- ctrl_reg &= ~(AR934X_NFC_CTRL_SMALL_PAGE);
- ctrl_reg |= (nfc->addr_count0 + 1) <<
- AR934X_NFC_CTRL_ADDR_CYCLE0_S;
- }
-
- cmd_reg = NAND_CMD_ERASE1 << AR934X_NFC_CMD_CMD0_S;
- cmd_reg |= command << AR934X_NFC_CMD_CMD1_S;
- cmd_reg |= AR934X_NFC_CMD_SEQ_ERASE;
-
- nfc_dbg(nfc, "erase page %d, a0:%08x a1:%08x cmd:%08x ctrl:%08x\n",
- page_addr, addr0, addr1, cmd_reg, ctrl_reg);
-
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_INT_STATUS, 0);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_CTRL, ctrl_reg);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_ADDR0_0, addr0);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_ADDR0_1, addr1);
-
- ar934x_nfc_write_cmd_reg(nfc, cmd_reg);
- ar934x_nfc_wait_dev_ready(nfc);
-}
-
-static int
-ar934x_nfc_send_write(struct ar934x_nfc *nfc, unsigned command, int column,
- int page_addr, int len)
-{
- u32 cmd_reg;
-
- nfc_dbg(nfc, "write, column=%d page=%d len=%d\n",
- column, page_addr, len);
-
- nfc_debug_data("[data] ", nfc->buf, len);
-
- cmd_reg = NAND_CMD_SEQIN << AR934X_NFC_CMD_CMD0_S;
- cmd_reg |= command << AR934X_NFC_CMD_CMD1_S;
- cmd_reg |= AR934X_NFC_CMD_SEQ_12;
-
- return ar934x_nfc_do_rw_command(nfc, column, page_addr, len,
- cmd_reg, nfc->ctrl_reg, true);
-}
-
-static void
-ar934x_nfc_read_status(struct ar934x_nfc *nfc)
-{
- u32 cmd_reg;
- u32 status;
-
- cmd_reg = NAND_CMD_STATUS << AR934X_NFC_CMD_CMD0_S;
- cmd_reg |= AR934X_NFC_CMD_SEQ_S;
-
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_INT_STATUS, 0);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_CTRL, nfc->ctrl_reg);
-
- ar934x_nfc_write_cmd_reg(nfc, cmd_reg);
- ar934x_nfc_wait_dev_ready(nfc);
-
- status = ar934x_nfc_rr(nfc, AR934X_NFC_REG_READ_STATUS);
-
- nfc_dbg(nfc, "read status, cmd:%08x status:%02x\n",
- cmd_reg, (status & 0xff));
-
- if (nfc->swap_dma)
- nfc->buf[0 ^ 3] = status;
- else
- nfc->buf[0] = status;
-}
-
-static void
-ar934x_nfc_cmdfunc(struct mtd_info *mtd, unsigned int command, int column,
- int page_addr)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- struct nand_chip *nand = &nfc->nand_chip;
-
- nfc->read_id = false;
- if (command != NAND_CMD_PAGEPROG)
- nfc->buf_index = 0;
-
- switch (command) {
- case NAND_CMD_RESET:
- ar934x_nfc_send_cmd(nfc, command);
- break;
-
- case NAND_CMD_READID:
- nfc->read_id = true;
- ar934x_nfc_send_readid(nfc, command);
- break;
-
- case NAND_CMD_READ0:
- case NAND_CMD_READ1:
- if (nfc->small_page) {
- ar934x_nfc_send_read(nfc, command, column, page_addr,
- mtd->writesize + mtd->oobsize);
- } else {
- ar934x_nfc_send_read(nfc, command, 0, page_addr,
- mtd->writesize + mtd->oobsize);
- nfc->buf_index = column;
- nfc->rndout_page_addr = page_addr;
- nfc->rndout_read_cmd = command;
- }
- break;
-
- case NAND_CMD_READOOB:
- if (nfc->small_page)
- ar934x_nfc_send_read(nfc, NAND_CMD_READOOB,
- column, page_addr,
- mtd->oobsize);
- else
- ar934x_nfc_send_read(nfc, NAND_CMD_READ0,
- mtd->writesize, page_addr,
- mtd->oobsize);
- break;
-
- case NAND_CMD_RNDOUT:
- if (WARN_ON(nfc->small_page))
- break;
-
- /* emulate subpage read */
- ar934x_nfc_send_read(nfc, nfc->rndout_read_cmd, 0,
- nfc->rndout_page_addr,
- mtd->writesize + mtd->oobsize);
- nfc->buf_index = column;
- break;
-
- case NAND_CMD_ERASE1:
- nfc->erase1_page_addr = page_addr;
- break;
-
- case NAND_CMD_ERASE2:
- ar934x_nfc_send_erase(nfc, command, -1, nfc->erase1_page_addr);
- break;
-
- case NAND_CMD_STATUS:
- ar934x_nfc_read_status(nfc);
- break;
-
- case NAND_CMD_SEQIN:
- if (nfc->small_page) {
- /* output read command */
- if (column >= mtd->writesize) {
- column -= mtd->writesize;
- nfc->seqin_read_cmd = NAND_CMD_READOOB;
- } else if (column < 256) {
- nfc->seqin_read_cmd = NAND_CMD_READ0;
- } else {
- column -= 256;
- nfc->seqin_read_cmd = NAND_CMD_READ1;
- }
- } else {
- nfc->seqin_read_cmd = NAND_CMD_READ0;
- }
- nfc->seqin_column = column;
- nfc->seqin_page_addr = page_addr;
- break;
-
- case NAND_CMD_PAGEPROG:
- if (nand->ecc.mode == NAND_ECC_HW) {
- /* the data is already written */
- break;
- }
-
- if (nfc->small_page)
- ar934x_nfc_send_cmd(nfc, nfc->seqin_read_cmd);
-
- ar934x_nfc_send_write(nfc, command, nfc->seqin_column,
- nfc->seqin_page_addr,
- nfc->buf_index);
- break;
-
- default:
- dev_err(nfc->parent,
- "unsupported command: %x, column:%d page_addr=%d\n",
- command, column, page_addr);
- break;
- }
-}
-
-static int
-ar934x_nfc_dev_ready(struct mtd_info *mtd)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
-
- return __ar934x_nfc_dev_ready(nfc);
-}
-
-static void
-ar934x_nfc_select_chip(struct mtd_info *mtd, int chip_no)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
-
- if (nfc->select_chip)
- nfc->select_chip(chip_no);
-}
-
-static u8
-ar934x_nfc_read_byte(struct mtd_info *mtd)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- u8 data;
-
- WARN_ON(nfc->buf_index >= nfc->buf_size);
-
- if (nfc->swap_dma || nfc->read_id)
- data = nfc->buf[nfc->buf_index ^ 3];
- else
- data = nfc->buf[nfc->buf_index];
-
- nfc->buf_index++;
-
- return data;
-}
-
-static void
-ar934x_nfc_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- int i;
-
- WARN_ON(nfc->buf_index + len > nfc->buf_size);
-
- if (nfc->swap_dma) {
- for (i = 0; i < len; i++) {
- nfc->buf[nfc->buf_index ^ 3] = buf[i];
- nfc->buf_index++;
- }
- } else {
- for (i = 0; i < len; i++) {
- nfc->buf[nfc->buf_index] = buf[i];
- nfc->buf_index++;
- }
- }
-}
-
-static void
-ar934x_nfc_read_buf(struct mtd_info *mtd, u8 *buf, int len)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- int buf_index;
- int i;
-
- WARN_ON(nfc->buf_index + len > nfc->buf_size);
-
- buf_index = nfc->buf_index;
-
- if (nfc->swap_dma || nfc->read_id) {
- for (i = 0; i < len; i++) {
- buf[i] = nfc->buf[buf_index ^ 3];
- buf_index++;
- }
- } else {
- for (i = 0; i < len; i++) {
- buf[i] = nfc->buf[buf_index];
- buf_index++;
- }
- }
-
- nfc->buf_index = buf_index;
-}
-
-static inline void
-ar934x_nfc_enable_hwecc(struct ar934x_nfc *nfc)
-{
- nfc->ctrl_reg |= AR934X_NFC_CTRL_ECC_EN;
- nfc->ctrl_reg &= ~AR934X_NFC_CTRL_CUSTOM_SIZE_EN;
-}
-
-static inline void
-ar934x_nfc_disable_hwecc(struct ar934x_nfc *nfc)
-{
- nfc->ctrl_reg &= ~AR934X_NFC_CTRL_ECC_EN;
- nfc->ctrl_reg |= AR934X_NFC_CTRL_CUSTOM_SIZE_EN;
-}
-
-static int
-ar934x_nfc_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
- int page)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- int err;
-
- nfc_dbg(nfc, "read_oob: page:%d\n", page);
-
- err = ar934x_nfc_send_read(nfc, NAND_CMD_READ0, mtd->writesize, page,
- mtd->oobsize);
- if (err)
- return err;
-
- memcpy(chip->oob_poi, nfc->buf, mtd->oobsize);
-
- return 0;
-}
-
-static int
-ar934x_nfc_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
- int page)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
-
- nfc_dbg(nfc, "write_oob: page:%d\n", page);
-
- memcpy(nfc->buf, chip->oob_poi, mtd->oobsize);
-
- return ar934x_nfc_send_write(nfc, NAND_CMD_PAGEPROG, mtd->writesize,
- page, mtd->oobsize);
-}
-
-static int
-ar934x_nfc_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
- u8 *buf, int oob_required, int page)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- int len;
- int err;
-
- nfc_dbg(nfc, "read_page_raw: page:%d oob:%d\n", page, oob_required);
-
- len = mtd->writesize;
- if (oob_required)
- len += mtd->oobsize;
-
- err = ar934x_nfc_send_read(nfc, NAND_CMD_READ0, 0, page, len);
- if (err)
- return err;
-
- memcpy(buf, nfc->buf, mtd->writesize);
-
- if (oob_required)
- memcpy(chip->oob_poi, &nfc->buf[mtd->writesize], mtd->oobsize);
-
- return 0;
-}
-
-static int
-ar934x_nfc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
- u8 *buf, int oob_required, int page)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- u32 ecc_ctrl;
- int max_bitflips = 0;
- bool ecc_failed;
- bool ecc_corrected;
- int err;
-
- nfc_dbg(nfc, "read_page: page:%d oob:%d\n", page, oob_required);
-
- ar934x_nfc_enable_hwecc(nfc);
- err = ar934x_nfc_send_read(nfc, NAND_CMD_READ0, 0, page,
- mtd->writesize);
- ar934x_nfc_disable_hwecc(nfc);
-
- if (err)
- return err;
-
- /* TODO: optimize to avoid memcpy */
- memcpy(buf, nfc->buf, mtd->writesize);
-
- /* read the ECC status */
- ecc_ctrl = ar934x_nfc_rr(nfc, AR934X_NFC_REG_ECC_CTRL);
- ecc_failed = ecc_ctrl & AR934X_NFC_ECC_CTRL_ERR_UNCORRECT;
- ecc_corrected = ecc_ctrl & AR934X_NFC_ECC_CTRL_ERR_CORRECT;
-
- if (oob_required || ecc_failed) {
- err = ar934x_nfc_send_read(nfc, NAND_CMD_READ0, mtd->writesize,
- page, mtd->oobsize);
- if (err)
- return err;
-
- if (oob_required)
- memcpy(chip->oob_poi, nfc->buf, mtd->oobsize);
- }
-
- if (ecc_failed) {
- /*
- * The hardware ECC engine reports uncorrectable errors
- * on empty pages. Check the ECC bytes and the data. If
- * both contains 0xff bytes only, dont report a failure.
- *
- * TODO: prebuild a buffer with 0xff bytes and use memcmp
- * for better performance?
- */
- if (!is_all_ff(&nfc->buf[nfc->ecc_oob_pos], chip->ecc.total) ||
- !is_all_ff(buf, mtd->writesize))
- mtd->ecc_stats.failed++;
- } else if (ecc_corrected) {
- /*
- * The hardware does not report the exact count of the
- * corrected bitflips, use assumptions based on the
- * threshold.
- */
- if (ecc_ctrl & AR934X_NFC_ECC_CTRL_ERR_OVER) {
- /*
- * The number of corrected bitflips exceeds the
- * threshold. Assume the maximum.
- */
- max_bitflips = chip->ecc.strength * chip->ecc.steps;
- } else {
- max_bitflips = nfc->ecc_thres * chip->ecc.steps;
- }
-
- mtd->ecc_stats.corrected += max_bitflips;
- }
-
- return max_bitflips;
-}
-
-static int
-ar934x_nfc_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
- const u8 *buf, int oob_required, int page)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- int len;
-
- nfc_dbg(nfc, "write_page_raw: page:%d oob:%d\n", page, oob_required);
-
- memcpy(nfc->buf, buf, mtd->writesize);
- len = mtd->writesize;
-
- if (oob_required) {
- memcpy(&nfc->buf[mtd->writesize], chip->oob_poi, mtd->oobsize);
- len += mtd->oobsize;
- }
-
- return ar934x_nfc_send_write(nfc, NAND_CMD_PAGEPROG, 0, page, len);
-}
-
-static int
-ar934x_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
- const u8 *buf, int oob_required, int page)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- int err;
-
- nfc_dbg(nfc, "write_page: page:%d oob:%d\n", page, oob_required);
-
- /* write OOB first */
- if (oob_required &&
- !is_all_ff(chip->oob_poi, mtd->oobsize)) {
- err = ar934x_nfc_write_oob(mtd, chip, page);
- if (err)
- return err;
- }
-
- /* TODO: optimize to avoid memcopy */
- memcpy(nfc->buf, buf, mtd->writesize);
-
- ar934x_nfc_enable_hwecc(nfc);
- err = ar934x_nfc_send_write(nfc, NAND_CMD_PAGEPROG, 0, page,
- mtd->writesize);
- ar934x_nfc_disable_hwecc(nfc);
-
- return err;
-}
-
-static void
-ar934x_nfc_hw_init(struct ar934x_nfc *nfc)
-{
- struct ar934x_nfc_platform_data *pdata;
-
- pdata = ar934x_nfc_get_platform_data(nfc);
- if (pdata->hw_reset) {
- pdata->hw_reset(true);
- pdata->hw_reset(false);
- }
-
- /*
- * setup timings
- * TODO: make it configurable via platform data
- */
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_TIME_SEQ,
- AR934X_NFC_TIME_SEQ_DEFAULT);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_TIMINGS_ASYN,
- AR934X_NFC_TIMINGS_ASYN_DEFAULT);
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_TIMINGS_SYN,
- AR934X_NFC_TIMINGS_SYN_DEFAULT);
-
- /* disable WP on all chips, and select chip 0 */
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_MEM_CTRL, 0xff00);
-
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_DMA_ADDR_OFFS, 0);
-
- /* initialize Control register */
- nfc->ctrl_reg = AR934X_NFC_CTRL_CUSTOM_SIZE_EN;
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_CTRL, nfc->ctrl_reg);
-
- if (nfc->small_page) {
- /* Setup generic sequence register for small page reads. */
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_GEN_SEQ_CTRL,
- AR934X_NFC_GENSEQ_SMALL_PAGE_READ);
- }
-}
-
-static void
-ar934x_nfc_restart(struct ar934x_nfc *nfc)
-{
- u32 ctrl_reg;
-
- if (nfc->select_chip)
- nfc->select_chip(-1);
-
- ctrl_reg = nfc->ctrl_reg;
- ar934x_nfc_hw_init(nfc);
- nfc->ctrl_reg = ctrl_reg;
-
- if (nfc->select_chip)
- nfc->select_chip(0);
-
- ar934x_nfc_send_cmd(nfc, NAND_CMD_RESET);
-}
-
-static irqreturn_t
-ar934x_nfc_irq_handler(int irq, void *data)
-{
- struct ar934x_nfc *nfc = data;
- u32 status;
-
- status = ar934x_nfc_rr(nfc, AR934X_NFC_REG_INT_STATUS);
-
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_INT_STATUS, 0);
- /* flush write */
- ar934x_nfc_rr(nfc, AR934X_NFC_REG_INT_STATUS);
-
- status &= ar934x_nfc_rr(nfc, AR934X_NFC_REG_INT_MASK);
- if (status) {
- nfc_dbg(nfc, "got IRQ, status:%08x\n", status);
-
- nfc->irq_status = status;
- nfc->spurious_irq_expected = true;
- wake_up(&nfc->irq_waitq);
- } else {
- if (nfc->spurious_irq_expected) {
- nfc->spurious_irq_expected = false;
- } else {
- dev_warn(nfc->parent, "spurious interrupt\n");
- }
- }
-
- return IRQ_HANDLED;
-}
-
-static int
-ar934x_nfc_init_tail(struct mtd_info *mtd)
-{
- struct ar934x_nfc *nfc = mtd_to_ar934x_nfc(mtd);
- struct nand_chip *chip = &nfc->nand_chip;
- u32 ctrl;
- u32 t;
- int err;
-
- switch (mtd->oobsize) {
- case 16:
- case 64:
- case 128:
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_SPARE_SIZE, mtd->oobsize);
- break;
-
- default:
- dev_err(nfc->parent, "unsupported OOB size: %d bytes\n",
- mtd->oobsize);
- return -ENXIO;
- }
-
- ctrl = AR934X_NFC_CTRL_CUSTOM_SIZE_EN;
-
- switch (mtd->erasesize / mtd->writesize) {
- case 32:
- t = AR934X_NFC_CTRL_BLOCK_SIZE_32;
- break;
-
- case 64:
- t = AR934X_NFC_CTRL_BLOCK_SIZE_64;
- break;
-
- case 128:
- t = AR934X_NFC_CTRL_BLOCK_SIZE_128;
- break;
-
- case 256:
- t = AR934X_NFC_CTRL_BLOCK_SIZE_256;
- break;
-
- default:
- dev_err(nfc->parent, "unsupported block size: %u\n",
- mtd->erasesize / mtd->writesize);
- return -ENXIO;
- }
-
- ctrl |= t << AR934X_NFC_CTRL_BLOCK_SIZE_S;
-
- switch (mtd->writesize) {
- case 256:
- nfc->small_page = 1;
- t = AR934X_NFC_CTRL_PAGE_SIZE_256;
- break;
-
- case 512:
- nfc->small_page = 1;
- t = AR934X_NFC_CTRL_PAGE_SIZE_512;
- break;
-
- case 1024:
- t = AR934X_NFC_CTRL_PAGE_SIZE_1024;
- break;
-
- case 2048:
- t = AR934X_NFC_CTRL_PAGE_SIZE_2048;
- break;
-
- case 4096:
- t = AR934X_NFC_CTRL_PAGE_SIZE_4096;
- break;
-
- case 8192:
- t = AR934X_NFC_CTRL_PAGE_SIZE_8192;
- break;
-
- case 16384:
- t = AR934X_NFC_CTRL_PAGE_SIZE_16384;
- break;
-
- default:
- dev_err(nfc->parent, "unsupported write size: %d bytes\n",
- mtd->writesize);
- return -ENXIO;
- }
-
- ctrl |= t << AR934X_NFC_CTRL_PAGE_SIZE_S;
-
- if (nfc->small_page) {
- ctrl |= AR934X_NFC_CTRL_SMALL_PAGE;
-
- if (chip->chipsize > (32 << 20)) {
- nfc->addr_count0 = 4;
- nfc->addr_count1 = 3;
- } else if (chip->chipsize > (2 << 16)) {
- nfc->addr_count0 = 3;
- nfc->addr_count1 = 2;
- } else {
- nfc->addr_count0 = 2;
- nfc->addr_count1 = 1;
- }
- } else {
- if (chip->chipsize > (128 << 20)) {
- nfc->addr_count0 = 5;
- nfc->addr_count1 = 3;
- } else if (chip->chipsize > (8 << 16)) {
- nfc->addr_count0 = 4;
- nfc->addr_count1 = 2;
- } else {
- nfc->addr_count0 = 3;
- nfc->addr_count1 = 1;
- }
- }
-
- ctrl |= nfc->addr_count0 << AR934X_NFC_CTRL_ADDR_CYCLE0_S;
- ctrl |= nfc->addr_count1 << AR934X_NFC_CTRL_ADDR_CYCLE1_S;
-
- nfc->ctrl_reg = ctrl;
- ar934x_nfc_wr(nfc, AR934X_NFC_REG_CTRL, nfc->ctrl_reg);
-
- ar934x_nfc_free_buf(nfc);
- err = ar934x_nfc_alloc_buf(nfc, mtd->writesize + mtd->oobsize);
-
- return err;
-}
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
-static struct nand_ecclayout ar934x_nfc_oob_64_hwecc = {
- .eccbytes = 28,
- .eccpos = {
- 20, 21, 22, 23, 24, 25, 26,
- 27, 28, 29, 30, 31, 32, 33,
- 34, 35, 36, 37, 38, 39, 40,
- 41, 42, 43, 44, 45, 46, 47,
- },
- .oobfree = {
- {
- .offset = 4,
- .length = 16,
- },
- {
- .offset = 48,
- .length = 16,
- },
- },
-};
-
-#else
-
-static int ar934x_nfc_ooblayout_ecc(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- if (section)
- return -ERANGE;
-
- oobregion->offset = 20;
- oobregion->length = 28;
-
- return 0;
-}
-
-static int ar934x_nfc_ooblayout_free(struct mtd_info *mtd, int section,
- struct mtd_oob_region *oobregion)
-{
- switch (section) {
- case 0:
- oobregion->offset = 4;
- oobregion->length = 16;
- return 0;
- case 1:
- oobregion->offset = 48;
- oobregion->length = 16;
- return 0;
- default:
- return -ERANGE;
- }
-}
-
-static const struct mtd_ooblayout_ops ar934x_nfc_ecclayout_ops = {
- .ecc = ar934x_nfc_ooblayout_ecc,
- .free = ar934x_nfc_ooblayout_free,
-};
-#endif /* < 4.6 */
-
-static int
-ar934x_nfc_setup_hwecc(struct ar934x_nfc *nfc)
-{
- struct nand_chip *nand = &nfc->nand_chip;
- struct mtd_info *mtd = ar934x_nfc_to_mtd(nfc);
- u32 ecc_cap;
- u32 ecc_thres;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)
- struct mtd_oob_region oobregion;
-#endif
-
- if (!IS_ENABLED(CONFIG_MTD_NAND_AR934X_HW_ECC)) {
- dev_err(nfc->parent, "hardware ECC support is disabled\n");
- return -EINVAL;
- }
-
- switch (mtd->writesize) {
- case 2048:
- /*
- * Writing a subpage separately is not supported, because
- * the controller only does ECC on full-page accesses.
- */
- nand->options = NAND_NO_SUBPAGE_WRITE;
-
- nand->ecc.size = 512;
- nand->ecc.bytes = 7;
- nand->ecc.strength = 4;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
- nand->ecc.layout = &ar934x_nfc_oob_64_hwecc;
-#else
- mtd_set_ooblayout(mtd, &ar934x_nfc_ecclayout_ops);
-#endif
- break;
-
- default:
- dev_err(nfc->parent,
- "hardware ECC is not available for %d byte pages\n",
- mtd->writesize);
- return -EINVAL;
- }
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
- BUG_ON(!nand->ecc.layout);
-#else
- BUG_ON(!mtd->ooblayout->ecc);
-#endif
-
- switch (nand->ecc.strength) {
- case 4:
- ecc_cap = AR934X_NFC_ECC_CTRL_ECC_CAP_4;
- ecc_thres = 4;
- break;
-
- default:
- dev_err(nfc->parent, "unsupported ECC strength %u\n",
- nand->ecc.strength);
- return -EINVAL;
- }
-
- nfc->ecc_thres = ecc_thres;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
- nfc->ecc_oob_pos = nand->ecc.layout->eccpos[0];
-#else
- mtd->ooblayout->ecc(mtd, 0, &oobregion);
- nfc->ecc_oob_pos = oobregion.offset;
-#endif
-
- nfc->ecc_ctrl_reg = ecc_cap << AR934X_NFC_ECC_CTRL_ECC_CAP_S;
- nfc->ecc_ctrl_reg |= ecc_thres << AR934X_NFC_ECC_CTRL_ERR_THRES_S;
-
- nfc->ecc_offset_reg = mtd->writesize + nfc->ecc_oob_pos;
-
- nand->ecc.mode = NAND_ECC_HW;
- nand->ecc.read_page = ar934x_nfc_read_page;
- nand->ecc.read_page_raw = ar934x_nfc_read_page_raw;
- nand->ecc.write_page = ar934x_nfc_write_page;
- nand->ecc.write_page_raw = ar934x_nfc_write_page_raw;
- nand->ecc.read_oob = ar934x_nfc_read_oob;
- nand->ecc.write_oob = ar934x_nfc_write_oob;
-
- return 0;
-}
-
-static int
-ar934x_nfc_probe(struct platform_device *pdev)
-{
- static const char *part_probes[] = { "cmdlinepart", NULL, };
- struct ar934x_nfc_platform_data *pdata;
- struct ar934x_nfc *nfc;
- struct resource *res;
- struct mtd_info *mtd;
- struct nand_chip *nand;
- struct mtd_part_parser_data ppdata;
- int ret;
-
- pdata = pdev->dev.platform_data;
- if (pdata == NULL) {
- dev_err(&pdev->dev, "no platform data defined\n");
- return -EINVAL;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "failed to get I/O memory\n");
- return -EINVAL;
- }
-
- nfc = devm_kzalloc(&pdev->dev, sizeof(struct ar934x_nfc), GFP_KERNEL);
- if (!nfc) {
- dev_err(&pdev->dev, "failed to allocate driver data\n");
- return -ENOMEM;
- }
-
- nfc->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(nfc->base)) {
- dev_err(&pdev->dev, "failed to remap I/O memory\n");
- return PTR_ERR(nfc->base);
- }
-
- nfc->irq = platform_get_irq(pdev, 0);
- if (nfc->irq < 0) {
- dev_err(&pdev->dev, "no IRQ resource specified\n");
- return -EINVAL;
- }
-
- init_waitqueue_head(&nfc->irq_waitq);
- ret = request_irq(nfc->irq, ar934x_nfc_irq_handler, 0,
- dev_name(&pdev->dev), nfc);
- if (ret) {
- dev_err(&pdev->dev, "requast_irq failed, err:%d\n", ret);
- return ret;
- }
-
- nfc->parent = &pdev->dev;
- nfc->select_chip = pdata->select_chip;
- nfc->swap_dma = pdata->swap_dma;
-
- nand = &nfc->nand_chip;
- mtd = ar934x_nfc_to_mtd(nfc);
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
- mtd->priv = nand;
-#endif
- mtd->owner = THIS_MODULE;
- if (pdata->name)
- mtd->name = pdata->name;
- else
- mtd->name = dev_name(&pdev->dev);
-
- nand->chip_delay = 25;
-
- nand->dev_ready = ar934x_nfc_dev_ready;
- nand->cmdfunc = ar934x_nfc_cmdfunc;
- nand->read_byte = ar934x_nfc_read_byte;
- nand->write_buf = ar934x_nfc_write_buf;
- nand->read_buf = ar934x_nfc_read_buf;
- nand->select_chip = ar934x_nfc_select_chip;
-
- ret = ar934x_nfc_alloc_buf(nfc, AR934X_NFC_ID_BUF_SIZE);
- if (ret)
- goto err_free_irq;
-
- platform_set_drvdata(pdev, nfc);
-
- ar934x_nfc_hw_init(nfc);
-
- ret = nand_scan_ident(mtd, 1, NULL);
- if (ret) {
- dev_err(&pdev->dev, "nand_scan_ident failed, err:%d\n", ret);
- goto err_free_buf;
- }
-
- ret = ar934x_nfc_init_tail(mtd);
- if (ret) {
- dev_err(&pdev->dev, "init tail failed, err:%d\n", ret);
- goto err_free_buf;
- }
-
- if (pdata->scan_fixup) {
- ret = pdata->scan_fixup(mtd);
- if (ret)
- goto err_free_buf;
- }
-
- switch (pdata->ecc_mode) {
- case AR934X_NFC_ECC_SOFT:
- nand->ecc.mode = NAND_ECC_SOFT;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)
- nand->ecc.algo = NAND_ECC_HAMMING;
-#endif
- break;
-
- case AR934X_NFC_ECC_SOFT_BCH:
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
- nand->ecc.mode = NAND_ECC_SOFT_BCH;
-#else
- nand->ecc.mode = NAND_ECC_SOFT;
- nand->ecc.algo = NAND_ECC_BCH;
-#endif
- break;
-
- case AR934X_NFC_ECC_HW:
- ret = ar934x_nfc_setup_hwecc(nfc);
- if (ret)
- goto err_free_buf;
-
- break;
-
- default:
- dev_err(nfc->parent, "unknown ECC mode %d\n", pdata->ecc_mode);
- return -EINVAL;
- }
-
- ret = nand_scan_tail(mtd);
- if (ret) {
- dev_err(&pdev->dev, "scan tail failed, err:%d\n", ret);
- goto err_free_buf;
- }
-
- memset(&ppdata, '\0', sizeof(ppdata));
- ret = mtd_device_parse_register(mtd, part_probes, &ppdata,
- pdata->parts, pdata->nr_parts);
- if (ret) {
- dev_err(&pdev->dev, "unable to register mtd, err:%d\n", ret);
- goto err_free_buf;
- }
-
- return 0;
-
-err_free_buf:
- ar934x_nfc_free_buf(nfc);
-err_free_irq:
- free_irq(nfc->irq, nfc);
- return ret;
-}
-
-static int
-ar934x_nfc_remove(struct platform_device *pdev)
-{
- struct ar934x_nfc *nfc;
- struct mtd_info *mtd;
-
- nfc = platform_get_drvdata(pdev);
- if (nfc) {
- mtd = ar934x_nfc_to_mtd(nfc);
- nand_release(&nfc->nand_chip);
- ar934x_nfc_free_buf(nfc);
- free_irq(nfc->irq, nfc);
- }
-
- return 0;
-}
-
-static struct platform_driver ar934x_nfc_driver = {
- .probe = ar934x_nfc_probe,
- .remove = ar934x_nfc_remove,
- .driver = {
- .name = AR934X_NFC_DRIVER_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-module_platform_driver(ar934x_nfc_driver);
-
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-MODULE_DESCRIPTION("Atheros AR934x NAND Flash Controller driver");
-MODULE_ALIAS("platform:" AR934X_NFC_DRIVER_NAME);
projects / openwrt / openwrt.git / blobdiff