diff options
Diffstat (limited to 'drivers/mtd/nand/raw/cortina_nand.c')
| -rw-r--r-- | drivers/mtd/nand/raw/cortina_nand.c | 1390 |
1 files changed, 1390 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/cortina_nand.c b/drivers/mtd/nand/raw/cortina_nand.c new file mode 100644 index 0000000000..12bd1ded83 --- /dev/null +++ b/drivers/mtd/nand/raw/cortina_nand.c @@ -0,0 +1,1390 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2020, Cortina Access Inc.. + */ + +#include <common.h> +#include <linux/delay.h> +#include <linux/bitops.h> +#include <linux/sizes.h> +#include <log.h> +#include <asm/io.h> +#include <memalign.h> +#include <nand.h> +#include <dm/device_compat.h> +#include <linux/bug.h> +#include <linux/delay.h> +#include <linux/iopoll.h> +#include <linux/errno.h> +#include <asm/gpio.h> +#include <fdtdec.h> +#include <bouncebuf.h> +#include <dm.h> +#include "cortina_nand.h" + +static unsigned int *pread, *pwrite; + +static const struct udevice_id cortina_nand_dt_ids[] = { + { + .compatible = "cortina,ca-nand", + }, + { /* sentinel */ } +}; + +static struct nand_ecclayout eccoob; + +/* Information about an attached NAND chip */ +struct fdt_nand { + int enabled; /* 1 to enable, 0 to disable */ + s32 width; /* bit width, must be 8 */ + u32 nand_ecc_strength; +}; + +struct nand_drv { + u32 fifo_index; + struct nand_ctlr *reg; + struct dma_global *dma_glb; + struct dma_ssp *dma_nand; + struct tx_descriptor_t *tx_desc; + struct rx_descriptor_t *rx_desc; + struct fdt_nand config; + unsigned int flash_base; +}; + +struct ca_nand_info { + struct udevice *dev; + struct nand_drv nand_ctrl; + struct nand_chip nand_chip; +}; + +/** + * Wait for command completion + * + * @param reg nand_ctlr structure + * @return + * 1 - Command completed + * 0 - Timeout + */ +static int nand_waitfor_cmd_completion(struct nand_ctlr *reg, unsigned int mask) +{ + unsigned int reg_v = 0; + + if (readl_poll_timeout(®->flash_flash_access_start, reg_v, + !(reg_v & mask), (FLASH_LONG_DELAY << 2))) { + pr_err("Nand CMD timeout!\n"); + return 0; + } + + return 1; +} + +/** + * Read one byte from the chip + * + * @param mtd MTD device structure + * @return data byte + * + * Read function for 8bit bus-width + */ +static uint8_t read_byte(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct nand_drv *info; + u8 ret_v; + + info = (struct nand_drv *)nand_get_controller_data(chip); + + clrsetbits_le32(&info->reg->flash_flash_access_start, GENMASK(31, 0), + NFLASH_GO | NFLASH_RD); + + if (!nand_waitfor_cmd_completion(info->reg, NFLASH_GO)) + printf("%s: Command timeout\n", __func__); + + ret_v = readl(&info->reg->flash_nf_data) >> (8 * info->fifo_index++); + info->fifo_index %= 4; + + return (uint8_t)ret_v; +} + +/** + * Read len bytes from the chip into a buffer + * + * @param mtd MTD device structure + * @param buf buffer to store data to + * @param len number of bytes to read + * + * Read function for 8bit bus-width + */ +static void read_buf(struct mtd_info *mtd, uint8_t *buf, int len) +{ + int i; + unsigned int reg; + struct nand_chip *chip = mtd_to_nand(mtd); + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + + for (i = 0; i < len; i++) { + clrsetbits_le32(&info->reg->flash_flash_access_start, + GENMASK(31, 0), NFLASH_GO | NFLASH_RD); + + if (!nand_waitfor_cmd_completion(info->reg, NFLASH_GO)) + printf("%s: Command timeout\n", __func__); + + reg = readl(&info->reg->flash_nf_data) >> + (8 * info->fifo_index++); + memcpy(buf + i, ®, 1); + info->fifo_index %= 4; + } +} + +/** + * Check READY pin status to see if it is ready or not + * + * @param mtd MTD device structure + * @return + * 1 - ready + * 0 - not ready + */ +static int nand_dev_ready(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + int reg_val; + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + + reg_val = readl(&info->reg->flash_status); + if (reg_val & NFLASH_READY) + return 1; + else + return 0; +} + +/* Dummy implementation: we don't support multiple chips */ +static void nand_select_chip(struct mtd_info *mtd, int chipnr) +{ + switch (chipnr) { + case -1: + case 0: + break; + + default: + WARN_ON(chipnr); + } +} + +int init_nand_dma(struct nand_chip *nand) +{ + int i; + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(nand); + + setbits_le32(&info->dma_glb->dma_glb_dma_lso_ctrl, TX_DMA_ENABLE); + setbits_le32(&info->dma_glb->dma_glb_dma_ssp_rx_ctrl, + TX_DMA_ENABLE | DMA_CHECK_OWNER); + setbits_le32(&info->dma_glb->dma_glb_dma_ssp_tx_ctrl, + RX_DMA_ENABLE | DMA_CHECK_OWNER); + + info->tx_desc = malloc_cache_aligned((sizeof(struct tx_descriptor_t) * + CA_DMA_DESC_NUM)); + info->rx_desc = malloc_cache_aligned((sizeof(struct rx_descriptor_t) * + CA_DMA_DESC_NUM)); + + if (!info->rx_desc && info->tx_desc) { + printf("Fail to alloc DMA descript!\n"); + kfree(info->tx_desc); + return -ENOMEM; + } else if (info->rx_desc && !info->tx_desc) { + printf("Fail to alloc DMA descript!\n"); + kfree(info->tx_desc); + return -ENOMEM; + } + + /* set RX DMA base address and depth */ + clrsetbits_le32(&info->dma_nand->dma_q_rxq_base_depth, + GENMASK(31, 4), (uintptr_t)info->rx_desc); + clrsetbits_le32(&info->dma_nand->dma_q_rxq_base_depth, + GENMASK(3, 0), CA_DMA_DEPTH); + + /* set TX DMA base address and depth */ + clrsetbits_le32(&info->dma_nand->dma_q_txq_base_depth, + GENMASK(31, 4), (uintptr_t)info->tx_desc); + clrsetbits_le32(&info->dma_nand->dma_q_txq_base_depth, + GENMASK(3, 0), CA_DMA_DEPTH); + + memset((unsigned char *)info->tx_desc, 0, + (sizeof(struct tx_descriptor_t) * CA_DMA_DESC_NUM)); + memset((unsigned char *)info->rx_desc, 0, + (sizeof(struct rx_descriptor_t) * CA_DMA_DESC_NUM)); + + for (i = 0; i < CA_DMA_DESC_NUM; i++) { + /* set owner bit as SW */ + info->tx_desc[i].own = 1; + /* enable Scatter-Gather memory copy */ + info->tx_desc[i].sgm = 0x1; + } + + return 0; +} + +/** + * Send command to NAND device + * + * @param mtd MTD device structure + * @param command the command to be sent + * @param column the column address for this command, -1 if none + * @param page_addr the page address for this command, -1 if none + */ +static void ca_nand_command(struct mtd_info *mtd, unsigned int command, + int column, int page_addr) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct nand_drv *info; + unsigned int reg_v = 0; + u32 cmd = 0, cnt = 0, addr1 = 0, addr2 = 0; + int ret; + + info = (struct nand_drv *)nand_get_controller_data(chip); + /* + * Write out the command to the device. + * + * Only command NAND_CMD_RESET or NAND_CMD_READID will come + * here before mtd->writesize is initialized. + */ + + /* Emulate NAND_CMD_READOOB */ + if (command == NAND_CMD_READOOB) { + assert(mtd->writesize != 0); + column += mtd->writesize; + command = NAND_CMD_READ0; + } + + /* Reset FIFO before issue new command */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0), + ECC_RESET_ALL); + ret = + readl_poll_timeout(&info->reg->flash_nf_ecc_reset, reg_v, + !(reg_v & RESET_NFLASH_FIFO), FLASH_SHORT_DELAY); + if (ret) { + printf("FIFO reset timeout\n"); + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0), + ECC_RESET_ALL); + udelay(10); + } + + /* Reset FIFO index + * Next read start from flash_nf_data[0] + */ + info->fifo_index = 0; + + clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(11, 10), + NFLASH_REG_WIDTH_8); + + /* + * Program and erase have their own busy handlers + * status and sequential in needs no delay + */ + switch (command) { + case NAND_CMD_READID: + /* Command */ + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0), + NAND_CMD_READID); + /* 1 byte CMD cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0), + REG_CMD_COUNT_1TOGO); + /* 1 byte CMD cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4), + REG_ADDR_COUNT_1); + /* Data cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8), + REG_DATA_COUNT_DATA_4); + /* 0 OOB cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22), + REG_OOB_COUNT_EMPTY); + + /* addresses */ + clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0), + column & ADDR1_MASK2); + clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0), + 0); + + /* clear FLASH_NF_ACCESS */ + clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(31, 0), + DISABLE_AUTO_RESET); + + break; + case NAND_CMD_PARAM: + /* Command */ + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0), + NAND_CMD_PARAM); + /* 1 byte CMD cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0), + REG_CMD_COUNT_1TOGO); + /* 1 byte ADDR cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4), + REG_ADDR_COUNT_1); + /* Data cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8), + (SZ_4K - 1) << 8); + /* 0 OOB cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22), + REG_OOB_COUNT_EMPTY); + + /* addresses */ + clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0), + column & ADDR1_MASK2); + clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0), + 0); + + break; + case NAND_CMD_READ0: + if (chip->chipsize < SZ_32M) { + cmd = NAND_CMD_READ0; + cnt = REG_CMD_COUNT_1TOGO | REG_ADDR_COUNT_3; + addr1 = (((page_addr & ADDR1_MASK0) << 8)); + addr2 = ((page_addr & ADDR2_MASK0) >> 24); + } else if (chip->chipsize >= SZ_32M && + (chip->chipsize <= SZ_128M)) { + cmd = NAND_CMD_READ0; + cnt = REG_ADDR_COUNT_4; + if (mtd->writesize > (REG_DATA_COUNT_512_DATA >> 8)) { + cmd |= (NAND_CMD_READSTART << 8); + cnt |= REG_CMD_COUNT_2TOGO; + } else { + cnt |= REG_CMD_COUNT_1TOGO; + } + addr1 = ((page_addr << 16) | (column & ADDR1_MASK1)); + addr2 = (page_addr >> 16); + } else { + cmd = NAND_CMD_READ0 | (NAND_CMD_READSTART << 8); + cnt = REG_CMD_COUNT_2TOGO | REG_ADDR_COUNT_5; + addr1 = ((page_addr << 16) | (column & ADDR1_MASK1)); + addr2 = (page_addr >> 16); + } + + /* Command */ + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0), + cmd); + /* CMD & ADDR cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(7, 0), cnt); + /* Data cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8), + (mtd->writesize - 1) << 8); + /* OOB cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22), + (mtd->oobsize - 1) << 22); + + /* addresses */ + clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0), + addr1); + clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0), + addr2); + + return; + case NAND_CMD_SEQIN: + if (chip->chipsize < SZ_32M) { + cnt = REG_CMD_COUNT_2TOGO | REG_ADDR_COUNT_3; + addr1 = (((page_addr & ADDR1_MASK0) << 8)); + addr2 = ((page_addr & ADDR2_MASK0) >> 24); + } else if (chip->chipsize >= SZ_32M && + (chip->chipsize <= SZ_128M)) { + cnt = REG_CMD_COUNT_2TOGO | REG_ADDR_COUNT_4; + addr1 = ((page_addr << 16) | (column & ADDR1_MASK1)); + addr2 = (page_addr >> 16); + } else { + cnt = REG_CMD_COUNT_2TOGO | REG_ADDR_COUNT_5; + addr1 = ((page_addr << 16) | (column & ADDR1_MASK1)); + addr2 = (page_addr >> 16); + } + + /* Command */ + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0), + NAND_CMD_SEQIN | (NAND_CMD_PAGEPROG << 8)); + /* CMD cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(7, 0), cnt); + /* Data cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8), + (mtd->writesize - 1) << 8); + /* OOB cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22), + (mtd->oobsize - 1) << 22); + + /* addresses */ + clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0), + addr1); + clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0), + addr2); + + return; + case NAND_CMD_PAGEPROG: + return; + case NAND_CMD_ERASE1: + /* Command */ + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0), + NAND_CMD_ERASE1 | (NAND_CMD_ERASE2 << 8)); + /* 2 byte CMD cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0), + REG_CMD_COUNT_2TOGO); + /* 3 byte ADDR cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4), + REG_ADDR_COUNT_3); + /* 0 Data cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8), + REG_DATA_COUNT_EMPTY); + /* 0 OOB cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22), + REG_OOB_COUNT_EMPTY); + + /* addresses */ + clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0), + page_addr); + clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0), + 0); + + /* Issue command */ + clrsetbits_le32(&info->reg->flash_flash_access_start, + GENMASK(31, 0), NFLASH_GO | NFLASH_RD); + break; + case NAND_CMD_ERASE2: + return; + case NAND_CMD_STATUS: + /* Command */ + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0), + NAND_CMD_STATUS); + /* 1 byte CMD cycle */ + clrbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0)); + /* 0 byte Addr cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4), + REG_ADDR_COUNT_EMPTY); + /* 1 Data cycle */ + clrbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8)); + /* 0 OOB cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22), + REG_OOB_COUNT_EMPTY); + + break; + case NAND_CMD_RESET: + /* Command */ + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0), + NAND_CMD_RESET); + /* 1 byte CMD cycle */ + clrbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0)); + /* 0 byte Addr cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(6, 4), + REG_ADDR_COUNT_EMPTY); + /* 0 Data cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(21, 8), + REG_DATA_COUNT_EMPTY); + /* 0 OOB cycle */ + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(31, 22), + REG_OOB_COUNT_EMPTY); + + /* addresses */ + clrsetbits_le32(&info->reg->flash_nf_address_1, GENMASK(31, 0), + column & ADDR1_MASK2); + clrsetbits_le32(&info->reg->flash_nf_address_2, GENMASK(31, 0), + 0); + + /* Issue command */ + clrsetbits_le32(&info->reg->flash_flash_access_start, + GENMASK(31, 0), NFLASH_GO | NFLASH_WT); + + break; + case NAND_CMD_RNDOUT: + default: + printf("%s: Unsupported command %d\n", __func__, command); + return; + } + + if (!nand_waitfor_cmd_completion(info->reg, NFLASH_GO)) + printf("Command 0x%02X timeout\n", command); +} + +/** + * Set up NAND bus width and page size + * + * @param info nand_info structure + * @return 0 if ok, -1 on error + */ +static int set_bus_width_page_size(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + + if (info->config.width == SZ_8) { + clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(31, 0), + NFLASH_REG_WIDTH_8); + } else if (info->config.width == SZ_16) { + clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(31, 0), + NFLASH_REG_WIDTH_16); + } else { + debug("%s: Unsupported bus width %d\n", __func__, + info->config.width); + return -1; + } + + if (mtd->writesize == SZ_512) { + setbits_le32(&info->reg->flash_type, FLASH_TYPE_512); + } else if (mtd->writesize == SZ_2K) { + setbits_le32(&info->reg->flash_type, FLASH_TYPE_2K); + } else if (mtd->writesize == SZ_4K) { + setbits_le32(&info->reg->flash_type, FLASH_TYPE_4K); + } else if (mtd->writesize == SZ_8K) { + setbits_le32(&info->reg->flash_type, FLASH_TYPE_8K); + } else { + debug("%s: Unsupported page size %d\n", __func__, + mtd->writesize); + return -1; + } + + return 0; +} + +static int ca_do_bch_correction(struct nand_chip *chip, + unsigned int err_num, u8 *buff_ptr, int i) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + unsigned int reg_v, err_loc0, err_loc1; + int k, max_bitflips; + + for (k = 0; k < (err_num + 1) / 2; k++) { + reg_v = readl(&info->reg->flash_nf_bch_error_loc01 + k); + err_loc0 = reg_v & BCH_ERR_LOC_MASK; + err_loc1 = (reg_v >> 16) & BCH_ERR_LOC_MASK; + + if (err_loc0 / 8 < BCH_DATA_UNIT) { + printf("pdata[%x]:%x =>", ((i / chip->ecc.bytes) * + chip->ecc.size + ((reg_v & 0x1fff) >> 3)), + buff_ptr[(reg_v & 0x1fff) >> 3]); + + buff_ptr[err_loc0 / 8] ^= + (1 << (reg_v & BCH_CORRECT_LOC_MASK)); + + printf("%x\n", buff_ptr[(reg_v & 0x1fff) >> 3]); + + max_bitflips++; + } + + if (((k + 1) * 2) <= err_num && ((err_loc1 / 8) < + BCH_DATA_UNIT)) { + printf("pdata[%x]:%x =>", ((i / chip->ecc.bytes) * + chip->ecc.size + (((reg_v >> 16) & 0x1fff) >> + 3)), buff_ptr[((reg_v >> 16) & 0x1fff) >> 3]); + + buff_ptr[err_loc1 / 8] ^= (1 << ((reg_v >> 16) & + BCH_CORRECT_LOC_MASK)); + + printf("%x\n", buff_ptr[((reg_v >> 16) & 0x1fff) >> 3]); + + max_bitflips++; + } + } + + return max_bitflips; +} + +static int ca_do_bch_decode(struct mtd_info *mtd, struct nand_chip *chip, + const u8 *buf, int page, unsigned int addr) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + unsigned int reg_v, err_num; + unsigned char *ecc_code = chip->buffers->ecccode; + unsigned char *ecc_end_pos; + int ret, i, j, k, n, step, eccsteps, max_bitflips = 0; + u8 *buff_ptr = (u8 *)buf; + + for (i = 0; i < chip->ecc.total; i++) + ecc_code[i] = chip->oob_poi[eccoob.eccpos[i]]; + + for (i = 0, eccsteps = chip->ecc.steps; eccsteps; + i += chip->ecc.bytes, eccsteps--) { + ecc_end_pos = ecc_code + chip->ecc.bytes; + + for (j = 0, k = 0; j < chip->ecc.bytes; j += 4, k++) { + reg_v = 0; + for (n = 0; n < 4 && ecc_code != ecc_end_pos; + ++n, ++ecc_code) { + reg_v |= *ecc_code << (8 * n); + } + clrsetbits_le32(&info->reg->flash_nf_bch_oob0 + k, + GENMASK(31, 0), reg_v); + } + + /* Clear ECC buffer */ + setbits_le32(&info->reg->flash_nf_ecc_reset, RESET_NFLASH_ECC); + ret = readl_poll_timeout(&info->reg->flash_nf_ecc_reset, reg_v, + !(reg_v & RESET_NFLASH_ECC), + FLASH_SHORT_DELAY); + if (ret) + pr_err("Reset ECC buffer fail\n"); + + clrsetbits_le32(&info->reg->flash_nf_bch_control, GENMASK(8, 8), + BCH_DISABLE); + + /* Start BCH */ + step = i / chip->ecc.bytes; + clrsetbits_le32(&info->reg->flash_nf_bch_control, + GENMASK(6, 4), step << 4); + setbits_le32(&info->reg->flash_nf_bch_control, BCH_ENABLE); + udelay(10); + setbits_le32(&info->reg->flash_nf_bch_control, BCH_COMPARE); + + ret = readl_poll_timeout(&info->reg->flash_nf_bch_status, reg_v, + (reg_v & BCH_DECO_DONE), + FLASH_SHORT_DELAY); + if (ret) + pr_err("ECC Decode timeout\n"); + + /* Stop compare */ + clrbits_le32(&info->reg->flash_nf_bch_control, BCH_COMPARE); + + reg_v = readl(&info->reg->flash_nf_bch_status); + err_num = (reg_v >> 8) & BCH_ERR_NUM_MASK; + reg_v &= BCH_ERR_MASK; + + /* Uncorrectable */ + if (reg_v == BCH_UNCORRECTABLE) { + max_bitflips = + nand_check_erased_ecc_chunk(buff_ptr, + chip->ecc.size, + &chip->buffers->ecccode[i], + chip->ecc.bytes, + NULL, 0, + chip->ecc.strength); + + if (max_bitflips) { + mtd->ecc_stats.failed++; + pr_err("Uncorrectable error\n"); + pr_err(" Page:%x step:%d\n", page, step); + + return -1; + } + } else if (reg_v == BCH_CORRECTABLE_ERR) { + printf("Correctable error(%x)!! addr:%lx\n", + err_num, (unsigned long)addr - mtd->writesize); + printf("Dst buf: %p [ColSel:%x ]\n", + buff_ptr + reg_v * BCH_DATA_UNIT, step); + + max_bitflips = + ca_do_bch_correction(chip, err_num, buff_ptr, i); + } + + buff_ptr += BCH_DATA_UNIT; + } + + /* Disable BCH */ + clrsetbits_le32(&info->reg->flash_nf_bch_control, GENMASK(31, 0), + BCH_DISABLE); + + return max_bitflips; +} + +static int ca_do_bch_encode(struct mtd_info *mtd, struct nand_chip *chip, + int page) +{ + struct nand_drv *info; + unsigned int reg_v; + int i, j, n, eccsteps, gen_index; + + info = (struct nand_drv *)nand_get_controller_data(chip); + + for (i = 0, n = 0, eccsteps = chip->ecc.steps; eccsteps; + i += chip->ecc.bytes, eccsteps--, n++) { + gen_index = 0; + for (j = 0; j < chip->ecc.bytes; j += 4, gen_index++) { + reg_v = + readl(&info->reg->flash_nf_bch_gen0_0 + gen_index + + 18 * n); + chip->oob_poi[eccoob.eccpos[i + j]] = reg_v & OOB_MASK; + chip->oob_poi[eccoob.eccpos[i + j + 1]] = + (reg_v >> 8) & OOB_MASK; + chip->oob_poi[eccoob.eccpos[i + j + 2]] = + (reg_v >> 16) & OOB_MASK; + chip->oob_poi[eccoob.eccpos[i + j + 3]] = + (reg_v >> 24) & OOB_MASK; + } + } + + /* Disable BCH */ + clrsetbits_le32(&info->reg->flash_nf_bch_control, GENMASK(8, 8), + BCH_DISABLE); + + return 0; +} + +/** + * Page read/write function + * + * @param mtd mtd info structure + * @param chip nand chip info structure + * @param buf data buffer + * @param page page number + * @param with_ecc 1 to enable ECC, 0 to disable ECC + * @param is_writing 0 for read, 1 for write + * @return 0 when successfully completed + * -ETIMEDOUT when command timeout + */ +static int nand_rw_page(struct mtd_info *mtd, struct nand_chip *chip, + const u8 *buf, int page, int with_ecc, int is_writing) +{ + unsigned int reg_v, ext_addr, addr, dma_index; + struct tx_descriptor_t *tx_desc; + struct rx_descriptor_t *rx_desc; + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + int ret; + + /* reset ecc control */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0), + RESET_NFLASH_ECC); + + /* flash interrupt */ + clrsetbits_le32(&info->reg->flash_flash_interrupt, GENMASK(0, 0), + REGIRQ_CLEAR); + + /* reset ecc control */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0), + RESET_NFLASH_ECC); + + /* Disable TXQ */ + clrbits_le32(&info->dma_nand->dma_q_txq_control, GENMASK(0, 0)); + + /* Clear interrupt */ + setbits_le32(&info->dma_nand->dma_q_rxq_coal_interrupt, GENMASK(0, 0)); + setbits_le32(&info->dma_nand->dma_q_txq_coal_interrupt, GENMASK(0, 0)); + + if (with_ecc == 1) { + switch (info->config.nand_ecc_strength) { + case ECC_STRENGTH_8: + reg_v = BCH_ERR_CAP_8; + break; + case ECC_STRENGTH_16: + reg_v = BCH_ERR_CAP_16; + break; + case ECC_STRENGTH_24: + reg_v = BCH_ERR_CAP_24; + break; + case ECC_STRENGTH_40: + reg_v = BCH_ERR_CAP_40; + break; + default: + reg_v = BCH_ERR_CAP_16; + break; + } + reg_v |= BCH_ENABLE; + + /* BCH decode for flash read */ + if (is_writing == 0) + reg_v |= BCH_DECODE; + clrsetbits_le32(&info->reg->flash_nf_bch_control, + GENMASK(31, 0), reg_v); + } else { + clrsetbits_le32(&info->reg->flash_nf_bch_control, + GENMASK(31, 0), 0); + } + + /* Fill Extend address */ + ext_addr = ((page << chip->page_shift) / EXT_ADDR_MASK); + + clrsetbits_le32(&info->reg->flash_nf_access, + GENMASK(7, 0), (uintptr_t)ext_addr); + + addr = (uintptr_t)((page << chip->page_shift) % EXT_ADDR_MASK); + addr = (uintptr_t)(addr + info->flash_base); + + dma_index = readl(&info->dma_nand->dma_q_txq_wptr) & CA_DMA_Q_PTR_MASK; + + tx_desc = info->tx_desc; + rx_desc = info->rx_desc; + + /* TX/RX descriptor for page data */ + tx_desc[dma_index].own = OWN_DMA; + tx_desc[dma_index].buf_len = mtd->writesize; + rx_desc[dma_index].own = OWN_DMA; + rx_desc[dma_index].buf_len = mtd->writesize; + if (is_writing == 0) { + tx_desc[dma_index].buf_adr = (uintptr_t)addr; + rx_desc[dma_index].buf_adr = (uintptr_t)(buf); + } else { + tx_desc[dma_index].buf_adr = (uintptr_t)buf; + rx_desc[dma_index].buf_adr = (uintptr_t)(addr); + } + + dma_index++; + dma_index %= CA_DMA_DESC_NUM; + + /* TX/RX descriptor for OOB area */ + addr = (uintptr_t)(addr + mtd->writesize); + tx_desc[dma_index].own = OWN_DMA; + tx_desc[dma_index].buf_len = mtd->oobsize; + rx_desc[dma_index].own = OWN_DMA; + rx_desc[dma_index].buf_len = mtd->oobsize; + if (is_writing) { + tx_desc[dma_index].buf_adr = (uintptr_t)(chip->oob_poi); + rx_desc[dma_index].buf_adr = (uintptr_t)addr; + } else { + tx_desc[dma_index].buf_adr = (uintptr_t)addr; + rx_desc[dma_index].buf_adr = (uintptr_t)(chip->oob_poi); + dma_index++; + dma_index %= CA_DMA_DESC_NUM; + } + + if (is_writing == 1) { + clrsetbits_le32(&info->reg->flash_fifo_control, GENMASK(1, 0), + FIFO_WRITE); + } else { + clrsetbits_le32(&info->reg->flash_fifo_control, GENMASK(1, 0), + FIFO_READ); + } + + /* Start FIFO request */ + clrsetbits_le32(&info->reg->flash_flash_access_start, GENMASK(2, 2), + NFLASH_FIFO_REQ); + + /* Update DMA write pointer */ + clrsetbits_le32(&info->dma_nand->dma_q_txq_wptr, GENMASK(12, 0), + dma_index); + + /* Start DMA */ + clrsetbits_le32(&info->dma_nand->dma_q_txq_control, GENMASK(0, 0), + TX_DMA_ENABLE); + + /* Wait TX DMA done */ + ret = + readl_poll_timeout(&info->dma_nand->dma_q_txq_coal_interrupt, + reg_v, (reg_v & 1), FLASH_LONG_DELAY); + if (ret) { + pr_err("TX DMA timeout\n"); + return -ETIMEDOUT; + } + /* clear tx interrupt */ + setbits_le32(&info->dma_nand->dma_q_txq_coal_interrupt, 1); + + /* Wait RX DMA done */ + ret = + readl_poll_timeout(&info->dma_nand->dma_q_rxq_coal_interrupt, reg_v, + (reg_v & 1), FLASH_LONG_DELAY); + if (ret) { + pr_err("RX DMA timeout\n"); + return -ETIMEDOUT; + } + /* clear rx interrupt */ + setbits_le32(&info->dma_nand->dma_q_rxq_coal_interrupt, 1); + + /* wait NAND CMD done */ + if (is_writing == 0) { + if (!nand_waitfor_cmd_completion(info->reg, NFLASH_FIFO_REQ)) + printf("%s: Command timeout\n", __func__); + } + + /* Update DMA read pointer */ + clrsetbits_le32(&info->dma_nand->dma_q_rxq_rptr, GENMASK(12, 0), + dma_index); + + /* ECC correction */ + if (with_ecc == 1) { + ret = + readl_poll_timeout(&info->reg->flash_nf_bch_status, + reg_v, (reg_v & BCH_GEN_DONE), + FLASH_LONG_DELAY); + + if (ret) { + pr_err("BCH_GEN timeout! flash_nf_bch_status=[0x%x]\n", + reg_v); + return -ETIMEDOUT; + } + + if (is_writing == 0) + ca_do_bch_decode(mtd, chip, buf, page, addr); + else + ca_do_bch_encode(mtd, chip, page); + } + + if (is_writing) { + dma_index++; + dma_index %= CA_DMA_DESC_NUM; + + /* Update DMA R/W pointer */ + clrsetbits_le32(&info->dma_nand->dma_q_txq_wptr, GENMASK(12, 0), + dma_index); + + /* Wait TX DMA done */ + ret = + readl_poll_timeout(&info->dma_nand->dma_q_txq_coal_interrupt, + reg_v, (reg_v & 1), FLASH_LONG_DELAY); + if (ret) { + pr_err("TX DMA timeout\n"); + return -ETIMEDOUT; + } + /* clear tx interrupt */ + setbits_le32(&info->dma_nand->dma_q_txq_coal_interrupt, 1); + + /* Wait RX DMA done */ + ret = + readl_poll_timeout(&info->dma_nand->dma_q_rxq_coal_interrupt, + reg_v, (reg_v & 1), FLASH_LONG_DELAY); + if (ret) { + pr_err("RX DMA timeout\n"); + return -ETIMEDOUT; + } + /* clear rx interrupt */ + setbits_le32(&info->dma_nand->dma_q_rxq_coal_interrupt, 1); + + /* wait NAND CMD done */ + if (!nand_waitfor_cmd_completion(info->reg, NFLASH_FIFO_REQ)) + printf("%s: Command timeout\n", __func__); + + /* Update DMA R/W pointer */ + clrsetbits_le32(&info->dma_nand->dma_q_rxq_rptr, GENMASK(12, 0), + dma_index); + } + + return 0; +} + +/** + * Hardware ecc based page read function + * + * @param mtd mtd info structure + * @param chip nand chip info structure + * @param buf buffer to store read data + * @param page page number to read + * @return 0 when successfully completed + * -ETIMEDOUT when command timeout + */ +static int nand_read_page_hwecc(struct mtd_info *mtd, + struct nand_chip *chip, uint8_t *buf, + int oob_required, int page) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + int ret; + + ret = nand_rw_page(mtd, chip, buf, page, 1, 0); + if (ret) + return ret; + + /* Reset FIFO */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0), + ECC_RESET_ALL); + + return 0; +} + +/** + * Hardware ecc based page write function + * + * @param mtd mtd info structure + * @param chip nand chip info structure + * @param buf data buffer + * @return 0 when successfully completed + * -ETIMEDOUT when command timeout + */ +static int nand_write_page_hwecc(struct mtd_info *mtd, + struct nand_chip *chip, const uint8_t *buf, + int oob_required, int page) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + int ret; + + ret = nand_rw_page(mtd, chip, (uint8_t *)buf, page, 1, 1); + if (ret) + return ret; + + /* Reset FIFO */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0), + ECC_RESET_ALL); + + return 0; +} + +/** + * Read raw page data without ecc + * + * @param mtd mtd info structure + * @param chip nand chip info structure + * @param buf buffer to store read data + * @param page page number to read + * @return 0 when successfully completed + * -ETIMEDOUT when command timeout + */ +static int nand_read_page_raw(struct mtd_info *mtd, + struct nand_chip *chip, uint8_t *buf, + int oob_required, int page) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + int ret; + + ret = nand_rw_page(mtd, chip, buf, page, 0, 0); + if (ret) + return ret; + + /* Reset FIFO */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0), + ECC_RESET_ALL); + + return 0; +} + +/** + * Raw page write function + * + * @param mtd mtd info structure + * @param chip nand chip info structure + * @param buf data buffer + * @return 0 when successfully completed + * -ETIMEDOUT when command timeout + */ +static int nand_write_page_raw(struct mtd_info *mtd, + struct nand_chip *chip, const uint8_t *buf, + int oob_required, int page) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + int ret; + + ret = nand_rw_page(mtd, chip, buf, page, 0, 1); + if (ret) + return ret; + + /* Reset FIFO */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, GENMASK(31, 0), + ECC_RESET_ALL); + + return 0; +} + +/** + * OOB data read/write function + * + * @param mtd mtd info structure + * @param chip nand chip info structure + * @param page page number to read + * @param with_ecc 1 to enable ECC, 0 to disable ECC + * @param is_writing 0 for read, 1 for write + * @return 0 when successfully completed + * -ETIMEDOUT when command timeout + */ +static int nand_rw_oob(struct mtd_info *mtd, struct nand_chip *chip, + int page, int with_ecc, int is_writing) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + u32 reg_val; + int rw_index; + + if (is_writing) { + reg_val = NFLASH_GO | NFLASH_WT; + pwrite = (unsigned int *)chip->oob_poi; + } else { + reg_val = NFLASH_GO | NFLASH_RD; + pread = (unsigned int *)chip->oob_poi; + } + + for (rw_index = 0; rw_index < mtd->oobsize / 4; rw_index++) { + clrsetbits_le32(&info->reg->flash_nf_access, GENMASK(31, 0), + NFLASH_REG_WIDTH_32); + if (is_writing) + clrsetbits_le32(&info->reg->flash_nf_data, + GENMASK(31, 0), pwrite[rw_index]); + + clrsetbits_le32(&info->reg->flash_flash_access_start, + GENMASK(11, 10), reg_val); + + if (!nand_waitfor_cmd_completion(info->reg, NFLASH_GO)) + printf("%s: Command timeout\n", __func__); + + if (!is_writing) + pread[rw_index] = readl(&info->reg->flash_nf_data); + } + return 0; +} + +/** + * OOB data read function + * + * @param mtd mtd info structure + * @param chip nand chip info structure + * @param page page number to read + */ +static int nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, int page) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + int ret; + + chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); + if (mtd->writesize <= (REG_DATA_COUNT_512_DATA >> 8)) + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(7, 0), + NAND_CMD_READOOB); + ret = nand_rw_oob(mtd, chip, page, 0, 0); + + /* Reset FIFO */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, + GENMASK(31, 0), ECC_RESET_ALL); + + return ret; +} + +/** + * OOB data write function + * + * @param mtd mtd info structure + * @param chip nand chip info structure + * @param page page number to write + * @return 0 when successfully completed + * -ETIMEDOUT when command timeout + */ +static int nand_write_oob(struct mtd_info *mtd, struct nand_chip *chip, + int page) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(chip); + int ret; + + chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page); + if (mtd->writesize <= (REG_DATA_COUNT_512_DATA >> 8)) { + clrsetbits_le32(&info->reg->flash_nf_command, GENMASK(31, 0), + NAND_CMD_READOOB | (NAND_CMD_SEQIN << 8) | + (NAND_CMD_PAGEPROG << 16)); + clrsetbits_le32(&info->reg->flash_nf_count, GENMASK(1, 0), + REG_CMD_COUNT_3TOGO); + } + ret = nand_rw_oob(mtd, chip, page, 1, 1); + + /* Reset FIFO */ + clrsetbits_le32(&info->reg->flash_nf_ecc_reset, + GENMASK(31, 0), ECC_RESET_ALL); + + return ret; +} + +/** + * Decode NAND parameters from the device tree + * + * @param dev Driver model device + * @param config Device tree NAND configuration + */ +static int fdt_decode_nand(struct udevice *dev, struct nand_drv *info) +{ + int ecc_strength; + + info->reg = (struct nand_ctlr *)dev_read_addr(dev); + info->dma_glb = (struct dma_global *)dev_read_addr_index(dev, 1); + info->dma_nand = (struct dma_ssp *)dev_read_addr_index(dev, 2); + info->config.enabled = dev_read_enabled(dev); + ecc_strength = dev_read_u32_default(dev, "nand-ecc-strength", 16); + info->flash_base = + dev_read_u32_default(dev, "nand_flash_base_addr", NAND_BASE_ADDR); + + switch (ecc_strength) { + case ECC_STRENGTH_8: + info->config.nand_ecc_strength = ECC_STRENGTH_8; + break; + case ECC_STRENGTH_16: + info->config.nand_ecc_strength = ECC_STRENGTH_16; + break; + case ECC_STRENGTH_24: + info->config.nand_ecc_strength = ECC_STRENGTH_24; + break; + case ECC_STRENGTH_40: + info->config.nand_ecc_strength = ECC_STRENGTH_40; + break; + default: + info->config.nand_ecc_strength = ECC_STRENGTH_16; + } + + return 0; +} + +/** + * config flash type + * + * @param chip nand chip info structure + */ +static void nand_config_flash_type(struct nand_chip *nand) +{ + struct nand_drv *info = + (struct nand_drv *)nand_get_controller_data(nand); + struct mtd_info *mtd = nand_to_mtd(nand); + + switch (mtd->writesize) { + case WRITE_SIZE_512: + clrsetbits_le32(&info->reg->flash_type, GENMASK(31, 0), + FLASH_PIN | FLASH_TYPE_512); + break; + case WRITE_SIZE_2048: + clrsetbits_le32(&info->reg->flash_type, GENMASK(31, 0), + FLASH_PIN | FLASH_TYPE_2K); + break; + case WRITE_SIZE_4096: + clrsetbits_le32(&info->reg->flash_type, GENMASK(31, 0), + FLASH_PIN | FLASH_TYPE_4K); + break; + case WRITE_SIZE_8192: + clrsetbits_le32(&info->reg->flash_type, GENMASK(31, 0), + FLASH_PIN | FLASH_TYPE_8K); + break; + default: + pr_err("Unsupported page size(0x%x)!", nand->ecc.size); + } +} + +/** + * config oob layout + * + * @param chip nand chip info structure + * @return 0 when successfully completed + * -EINVAL when ECC bytes exceed OOB size + */ +static int nand_config_oob_layout(struct nand_chip *nand) +{ + int i, ecc_start_offset; + struct mtd_info *mtd = nand_to_mtd(nand); + + /* Calculate byte count for ECC */ + eccoob.eccbytes = mtd->writesize / nand->ecc.size * nand->ecc.bytes; + + if (mtd->oobsize < eccoob.eccbytes) { + pr_err("Spare area(%d) too small for BCH%d\n", nand->ecc.bytes, + nand->ecc.strength / 8); + pr_err("page_sz: %d\n", nand->ecc.size); + pr_err("oob_sz: %d\n", nand->ecc.bytes); + return -EINVAL; + } + + /* Update OOB layout */ + ecc_start_offset = mtd->oobsize - eccoob.eccbytes; + memset(eccoob.eccpos, 0, sizeof(eccoob.eccpos)); + for (i = 0; i < eccoob.eccbytes; ++i) + eccoob.eccpos[i] = i + ecc_start_offset; + + /* Unused spare area + * OOB[0] is bad block marker. + * Extra two byte is reserved as + * erase marker just right before ECC code. + */ + eccoob.oobavail = nand->ecc.bytes - eccoob.eccbytes - 2; + eccoob.oobfree[0].offset = 2; + eccoob.oobfree[0].length = + mtd->oobsize - eccoob.eccbytes - eccoob.oobfree[0].offset - 1; + + return 0; +} + +static int ca_nand_probe(struct udevice *dev) +{ + struct ca_nand_info *ca_nand = dev_get_priv(dev); + struct nand_chip *nand = &ca_nand->nand_chip; + struct nand_drv *info = &ca_nand->nand_ctrl; + struct fdt_nand *config = &info->config; + struct mtd_info *our_mtd; + int ret; + + if (fdt_decode_nand(dev, info)) { + printf("Could not decode nand-flash in device tree\n"); + return -1; + } + if (!config->enabled) + return -1; + + nand->ecc.mode = NAND_ECC_HW; + nand->ecc.layout = &eccoob; + + nand->cmdfunc = ca_nand_command; + nand->read_byte = read_byte; + nand->read_buf = read_buf; + nand->ecc.read_page = nand_read_page_hwecc; + nand->ecc.write_page = nand_write_page_hwecc; + nand->ecc.read_page_raw = nand_read_page_raw; + nand->ecc.write_page_raw = nand_write_page_raw; + nand->ecc.read_oob = nand_read_oob; + nand->ecc.write_oob = nand_write_oob; + nand->ecc.strength = config->nand_ecc_strength; + nand->select_chip = nand_select_chip; + nand->dev_ready = nand_dev_ready; + nand_set_controller_data(nand, &ca_nand->nand_ctrl); + + /* Disable subpage writes as we do not provide ecc->hwctl */ + nand->options |= NAND_NO_SUBPAGE_WRITE | NAND_SKIP_BBTSCAN; + + /* Configure flash type as P-NAND */ + clrsetbits_le32(&info->reg->flash_type, FLASH_PIN, + FLASH_TYPE_4K | FLASH_SIZE_436OOB); + config->width = FLASH_WIDTH; + + our_mtd = nand_to_mtd(nand); + ret = nand_scan_ident(our_mtd, CONFIG_SYS_NAND_MAX_CHIPS, NULL); + if (ret) + return ret; + + nand->ecc.size = BCH_DATA_UNIT; + nand->ecc.bytes = BCH_GF_PARAM_M * (nand->ecc.strength / 8); + + /* Reconfig flash type according to ONFI */ + nand_config_flash_type(nand); + + ret = set_bus_width_page_size(our_mtd); + if (ret) + return ret; + + /* Set the bad block position */ + nand->badblockpos = + our_mtd->writesize > + 512 ? NAND_LARGE_BADBLOCK_POS : NAND_SMALL_BADBLOCK_POS; + + /* Arrange OOB layout */ + ret = nand_config_oob_layout(nand); + if (ret) + return ret; + + /* Init DMA descriptor ring */ + ret = init_nand_dma(nand); + if (ret) + return ret; + + ret = nand_scan_tail(our_mtd); + if (ret) + return ret; + + ret = nand_register(0, our_mtd); + if (ret) { + dev_err(dev, "Failed to register MTD: %d\n", ret); + return ret; + } + + ret = set_bus_width_page_size(our_mtd); + if (ret) + return ret; + + printf("P-NAND : %s\n", our_mtd->name); + printf("Chip Size: %lldMB\n", nand->chipsize / (1024 * 1024)); + printf("Block Size: %dKB\n", our_mtd->erasesize / 1024); + printf("Page Size: %dB\n", our_mtd->writesize); + printf("OOB Size: %dB\n", our_mtd->oobsize); + + return 0; +} + +U_BOOT_DRIVER(cortina_nand) = { + .name = "CA-PNAND", + .id = UCLASS_MTD, + .of_match = cortina_nand_dt_ids, + .probe = ca_nand_probe, + .priv_auto = sizeof(struct ca_nand_info), +}; + +void board_nand_init(void) +{ + struct udevice *dev; + int ret; + + ret = uclass_get_device_by_driver(UCLASS_MTD, + DM_DRIVER_GET(cortina_nand), &dev); + if (ret && ret != -ENODEV) + pr_err("Failed to initialize %s. (error %d)\n", dev->name, ret); +} |