diff options
Diffstat (limited to 'target/linux/ar71xx/files/drivers/mtd/nand/ar934x_nfc.c')
| -rw-r--r-- | target/linux/ar71xx/files/drivers/mtd/nand/ar934x_nfc.c | 1591 |
1 files changed, 0 insertions, 1591 deletions
diff --git a/target/linux/ar71xx/files/drivers/mtd/nand/ar934x_nfc.c b/target/linux/ar71xx/files/drivers/mtd/nand/ar934x_nfc.c deleted file mode 100644 index 2e25c6b885..0000000000 --- a/target/linux/ar71xx/files/drivers/mtd/nand/ar934x_nfc.c +++ /dev/null @@ -1,1591 +0,0 @@ -/* - * 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); |