This patch uses regmap APIs to access all FMC2 registers. Signed-off-by: Christophe Kerello <christophe.kerello@xxxxxx> Reviewed-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx> --- Changes in v3: - add Miquel reviewed-by tag drivers/mtd/nand/raw/Kconfig | 2 + drivers/mtd/nand/raw/stm32_fmc2_nand.c | 268 +++++++++++++++------------------ 2 files changed, 127 insertions(+), 143 deletions(-) diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index 113f610..0a03ebf 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -415,6 +415,8 @@ config MTD_NAND_TEGRA config MTD_NAND_STM32_FMC2 tristate "Support for NAND controller on STM32MP SoCs" depends on MACH_STM32MP157 || COMPILE_TEST + select REGMAP + select REGMAP_MMIO help Enables support for NAND Flash chips on SoCs containing the FMC2 NAND controller. This controller is found on STM32MP SoCs. diff --git a/drivers/mtd/nand/raw/stm32_fmc2_nand.c b/drivers/mtd/nand/raw/stm32_fmc2_nand.c index e7b706b..6aa3695 100644 --- a/drivers/mtd/nand/raw/stm32_fmc2_nand.c +++ b/drivers/mtd/nand/raw/stm32_fmc2_nand.c @@ -15,6 +15,7 @@ #include <linux/mtd/rawnand.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> +#include <linux/regmap.h> #include <linux/reset.h> /* Bad block marker length */ @@ -203,6 +204,16 @@ #define FMC2_BCHDSR4_EBP7 GENMASK(12, 0) #define FMC2_BCHDSR4_EBP8 GENMASK(28, 16) +/* Regmap registers configuration */ +#define FMC2_MAX_REGISTER 0x3fc + +static const struct regmap_config stm32_fmc2_regmap_cfg = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = sizeof(u32), + .max_register = FMC2_MAX_REGISTER, +}; + enum stm32_fmc2_ecc { FMC2_ECC_HAM = 1, FMC2_ECC_BCH4 = 4, @@ -242,7 +253,7 @@ struct stm32_fmc2_nfc { struct nand_controller base; struct stm32_fmc2_nand nand; struct device *dev; - void __iomem *io_base; + struct regmap *regmap; void __iomem *data_base[FMC2_MAX_CE]; void __iomem *cmd_base[FMC2_MAX_CE]; void __iomem *addr_base[FMC2_MAX_CE]; @@ -277,40 +288,37 @@ static void stm32_fmc2_nfc_timings_init(struct nand_chip *chip) struct stm32_fmc2_nfc *nfc = to_stm32_nfc(chip->controller); struct stm32_fmc2_nand *nand = to_fmc2_nand(chip); struct stm32_fmc2_timings *timings = &nand->timings; - u32 pcr = readl_relaxed(nfc->io_base + FMC2_PCR); u32 pmem, patt; /* Set tclr/tar timings */ - pcr &= ~FMC2_PCR_TCLR; - pcr |= FIELD_PREP(FMC2_PCR_TCLR, timings->tclr); - pcr &= ~FMC2_PCR_TAR; - pcr |= FIELD_PREP(FMC2_PCR_TAR, timings->tar); + regmap_update_bits(nfc->regmap, FMC2_PCR, + FMC2_PCR_TCLR | FMC2_PCR_TAR, + FIELD_PREP(FMC2_PCR_TCLR, timings->tclr) | + FIELD_PREP(FMC2_PCR_TAR, timings->tar)); /* Set tset/twait/thold/thiz timings in common bank */ pmem = FIELD_PREP(FMC2_PMEM_MEMSET, timings->tset_mem); pmem |= FIELD_PREP(FMC2_PMEM_MEMWAIT, timings->twait); pmem |= FIELD_PREP(FMC2_PMEM_MEMHOLD, timings->thold_mem); pmem |= FIELD_PREP(FMC2_PMEM_MEMHIZ, timings->thiz); + regmap_write(nfc->regmap, FMC2_PMEM, pmem); /* Set tset/twait/thold/thiz timings in attribut bank */ patt = FIELD_PREP(FMC2_PATT_ATTSET, timings->tset_att); patt |= FIELD_PREP(FMC2_PATT_ATTWAIT, timings->twait); patt |= FIELD_PREP(FMC2_PATT_ATTHOLD, timings->thold_att); patt |= FIELD_PREP(FMC2_PATT_ATTHIZ, timings->thiz); - - writel_relaxed(pcr, nfc->io_base + FMC2_PCR); - writel_relaxed(pmem, nfc->io_base + FMC2_PMEM); - writel_relaxed(patt, nfc->io_base + FMC2_PATT); + regmap_write(nfc->regmap, FMC2_PATT, patt); } static void stm32_fmc2_nfc_setup(struct nand_chip *chip) { struct stm32_fmc2_nfc *nfc = to_stm32_nfc(chip->controller); - u32 pcr = readl_relaxed(nfc->io_base + FMC2_PCR); + u32 pcr = 0, pcr_mask; /* Configure ECC algorithm (default configuration is Hamming) */ - pcr &= ~FMC2_PCR_ECCALG; - pcr &= ~FMC2_PCR_BCHECC; + pcr_mask = FMC2_PCR_ECCALG; + pcr_mask |= FMC2_PCR_BCHECC; if (chip->ecc.strength == FMC2_ECC_BCH8) { pcr |= FMC2_PCR_ECCALG; pcr |= FMC2_PCR_BCHECC; @@ -319,15 +327,15 @@ static void stm32_fmc2_nfc_setup(struct nand_chip *chip) } /* Set buswidth */ - pcr &= ~FMC2_PCR_PWID; + pcr_mask |= FMC2_PCR_PWID; if (chip->options & NAND_BUSWIDTH_16) pcr |= FIELD_PREP(FMC2_PCR_PWID, FMC2_PCR_PWID_BUSWIDTH_16); /* Set ECC sector size */ - pcr &= ~FMC2_PCR_ECCSS; + pcr_mask |= FMC2_PCR_ECCSS; pcr |= FIELD_PREP(FMC2_PCR_ECCSS, FMC2_PCR_ECCSS_512); - writel_relaxed(pcr, nfc->io_base + FMC2_PCR); + regmap_update_bits(nfc->regmap, FMC2_PCR, pcr_mask, pcr); } static int stm32_fmc2_nfc_select_chip(struct nand_chip *chip, int chipnr) @@ -393,81 +401,63 @@ static int stm32_fmc2_nfc_select_chip(struct nand_chip *chip, int chipnr) static void stm32_fmc2_nfc_set_buswidth_16(struct stm32_fmc2_nfc *nfc, bool set) { - u32 pcr = readl_relaxed(nfc->io_base + FMC2_PCR); + u32 pcr; - pcr &= ~FMC2_PCR_PWID; - if (set) - pcr |= FIELD_PREP(FMC2_PCR_PWID, FMC2_PCR_PWID_BUSWIDTH_16); - writel_relaxed(pcr, nfc->io_base + FMC2_PCR); + pcr = set ? FIELD_PREP(FMC2_PCR_PWID, FMC2_PCR_PWID_BUSWIDTH_16) : + FIELD_PREP(FMC2_PCR_PWID, FMC2_PCR_PWID_BUSWIDTH_8); + + regmap_update_bits(nfc->regmap, FMC2_PCR, FMC2_PCR_PWID, pcr); } static void stm32_fmc2_nfc_set_ecc(struct stm32_fmc2_nfc *nfc, bool enable) { - u32 pcr = readl(nfc->io_base + FMC2_PCR); - - pcr &= ~FMC2_PCR_ECCEN; - if (enable) - pcr |= FMC2_PCR_ECCEN; - writel(pcr, nfc->io_base + FMC2_PCR); + regmap_update_bits(nfc->regmap, FMC2_PCR, FMC2_PCR_ECCEN, + enable ? FMC2_PCR_ECCEN : 0); } -static inline void stm32_fmc2_nfc_enable_seq_irq(struct stm32_fmc2_nfc *nfc) +static void stm32_fmc2_nfc_enable_seq_irq(struct stm32_fmc2_nfc *nfc) { - u32 csqier = readl_relaxed(nfc->io_base + FMC2_CSQIER); - - csqier |= FMC2_CSQIER_TCIE; - nfc->irq_state = FMC2_IRQ_SEQ; - writel_relaxed(csqier, nfc->io_base + FMC2_CSQIER); + regmap_update_bits(nfc->regmap, FMC2_CSQIER, + FMC2_CSQIER_TCIE, FMC2_CSQIER_TCIE); } -static inline void stm32_fmc2_nfc_disable_seq_irq(struct stm32_fmc2_nfc *nfc) +static void stm32_fmc2_nfc_disable_seq_irq(struct stm32_fmc2_nfc *nfc) { - u32 csqier = readl_relaxed(nfc->io_base + FMC2_CSQIER); - - csqier &= ~FMC2_CSQIER_TCIE; - - writel_relaxed(csqier, nfc->io_base + FMC2_CSQIER); + regmap_update_bits(nfc->regmap, FMC2_CSQIER, FMC2_CSQIER_TCIE, 0); nfc->irq_state = FMC2_IRQ_UNKNOWN; } -static inline void stm32_fmc2_nfc_clear_seq_irq(struct stm32_fmc2_nfc *nfc) +static void stm32_fmc2_nfc_clear_seq_irq(struct stm32_fmc2_nfc *nfc) { - writel_relaxed(FMC2_CSQICR_CLEAR_IRQ, nfc->io_base + FMC2_CSQICR); + regmap_write(nfc->regmap, FMC2_CSQICR, FMC2_CSQICR_CLEAR_IRQ); } -static inline void stm32_fmc2_nfc_enable_bch_irq(struct stm32_fmc2_nfc *nfc, - int mode) +static void stm32_fmc2_nfc_enable_bch_irq(struct stm32_fmc2_nfc *nfc, int mode) { - u32 bchier = readl_relaxed(nfc->io_base + FMC2_BCHIER); + nfc->irq_state = FMC2_IRQ_BCH; if (mode == NAND_ECC_WRITE) - bchier |= FMC2_BCHIER_EPBRIE; + regmap_update_bits(nfc->regmap, FMC2_BCHIER, + FMC2_BCHIER_EPBRIE, FMC2_BCHIER_EPBRIE); else - bchier |= FMC2_BCHIER_DERIE; - - nfc->irq_state = FMC2_IRQ_BCH; - - writel_relaxed(bchier, nfc->io_base + FMC2_BCHIER); + regmap_update_bits(nfc->regmap, FMC2_BCHIER, + FMC2_BCHIER_DERIE, FMC2_BCHIER_DERIE); } -static inline void stm32_fmc2_nfc_disable_bch_irq(struct stm32_fmc2_nfc *nfc) +static void stm32_fmc2_nfc_disable_bch_irq(struct stm32_fmc2_nfc *nfc) { - u32 bchier = readl_relaxed(nfc->io_base + FMC2_BCHIER); - - bchier &= ~FMC2_BCHIER_DERIE; - bchier &= ~FMC2_BCHIER_EPBRIE; - - writel_relaxed(bchier, nfc->io_base + FMC2_BCHIER); + regmap_update_bits(nfc->regmap, FMC2_BCHIER, + FMC2_BCHIER_DERIE | FMC2_BCHIER_EPBRIE, 0); nfc->irq_state = FMC2_IRQ_UNKNOWN; } -static inline void stm32_fmc2_nfc_clear_bch_irq(struct stm32_fmc2_nfc *nfc) +static void stm32_fmc2_nfc_clear_bch_irq(struct stm32_fmc2_nfc *nfc) { - writel_relaxed(FMC2_BCHICR_CLEAR_IRQ, nfc->io_base + FMC2_BCHICR); + regmap_write(nfc->regmap, FMC2_BCHICR, FMC2_BCHICR_CLEAR_IRQ); } /* @@ -481,13 +471,8 @@ static void stm32_fmc2_nfc_hwctl(struct nand_chip *chip, int mode) stm32_fmc2_nfc_set_ecc(nfc, false); if (chip->ecc.strength != FMC2_ECC_HAM) { - u32 pcr = readl_relaxed(nfc->io_base + FMC2_PCR); - - if (mode == NAND_ECC_WRITE) - pcr |= FMC2_PCR_WEN; - else - pcr &= ~FMC2_PCR_WEN; - writel_relaxed(pcr, nfc->io_base + FMC2_PCR); + regmap_update_bits(nfc->regmap, FMC2_PCR, FMC2_PCR_WEN, + mode == NAND_ECC_WRITE ? FMC2_PCR_WEN : 0); reinit_completion(&nfc->complete); stm32_fmc2_nfc_clear_bch_irq(nfc); @@ -502,7 +487,7 @@ static void stm32_fmc2_nfc_hwctl(struct nand_chip *chip, int mode) * ECC is 3 bytes for 512 bytes of data (supports error correction up to * max of 1-bit) */ -static inline void stm32_fmc2_nfc_ham_set_ecc(const u32 ecc_sta, u8 *ecc) +static void stm32_fmc2_nfc_ham_set_ecc(const u32 ecc_sta, u8 *ecc) { ecc[0] = ecc_sta; ecc[1] = ecc_sta >> 8; @@ -516,15 +501,15 @@ static int stm32_fmc2_nfc_ham_calculate(struct nand_chip *chip, const u8 *data, u32 sr, heccr; int ret; - ret = readl_relaxed_poll_timeout(nfc->io_base + FMC2_SR, - sr, sr & FMC2_SR_NWRF, 1, - 1000 * FMC2_TIMEOUT_MS); + ret = regmap_read_poll_timeout(nfc->regmap, FMC2_SR, sr, + sr & FMC2_SR_NWRF, 1, + 1000 * FMC2_TIMEOUT_MS); if (ret) { dev_err(nfc->dev, "ham timeout\n"); return ret; } - heccr = readl_relaxed(nfc->io_base + FMC2_HECCR); + regmap_read(nfc->regmap, FMC2_HECCR, &heccr); stm32_fmc2_nfc_ham_set_ecc(heccr, ecc); stm32_fmc2_nfc_set_ecc(nfc, false); @@ -603,13 +588,13 @@ static int stm32_fmc2_nfc_bch_calculate(struct nand_chip *chip, const u8 *data, } /* Read parity bits */ - bchpbr = readl_relaxed(nfc->io_base + FMC2_BCHPBR1); + regmap_read(nfc->regmap, FMC2_BCHPBR1, &bchpbr); ecc[0] = bchpbr; ecc[1] = bchpbr >> 8; ecc[2] = bchpbr >> 16; ecc[3] = bchpbr >> 24; - bchpbr = readl_relaxed(nfc->io_base + FMC2_BCHPBR2); + regmap_read(nfc->regmap, FMC2_BCHPBR2, &bchpbr); ecc[4] = bchpbr; ecc[5] = bchpbr >> 8; ecc[6] = bchpbr >> 16; @@ -617,13 +602,13 @@ static int stm32_fmc2_nfc_bch_calculate(struct nand_chip *chip, const u8 *data, if (chip->ecc.strength == FMC2_ECC_BCH8) { ecc[7] = bchpbr >> 24; - bchpbr = readl_relaxed(nfc->io_base + FMC2_BCHPBR3); + regmap_read(nfc->regmap, FMC2_BCHPBR3, &bchpbr); ecc[8] = bchpbr; ecc[9] = bchpbr >> 8; ecc[10] = bchpbr >> 16; ecc[11] = bchpbr >> 24; - bchpbr = readl_relaxed(nfc->io_base + FMC2_BCHPBR4); + regmap_read(nfc->regmap, FMC2_BCHPBR4, &bchpbr); ecc[12] = bchpbr; } @@ -685,11 +670,7 @@ static int stm32_fmc2_nfc_bch_correct(struct nand_chip *chip, u8 *dat, return -ETIMEDOUT; } - ecc_sta[0] = readl_relaxed(nfc->io_base + FMC2_BCHDSR0); - ecc_sta[1] = readl_relaxed(nfc->io_base + FMC2_BCHDSR1); - ecc_sta[2] = readl_relaxed(nfc->io_base + FMC2_BCHDSR2); - ecc_sta[3] = readl_relaxed(nfc->io_base + FMC2_BCHDSR3); - ecc_sta[4] = readl_relaxed(nfc->io_base + FMC2_BCHDSR4); + regmap_bulk_read(nfc->regmap, FMC2_BCHDSR0, ecc_sta, 5); stm32_fmc2_nfc_set_ecc(nfc, false); @@ -764,30 +745,29 @@ static void stm32_fmc2_nfc_rw_page_init(struct nand_chip *chip, int page, { struct stm32_fmc2_nfc *nfc = to_stm32_nfc(chip->controller); struct mtd_info *mtd = nand_to_mtd(chip); - u32 csqcfgr1, csqcfgr2, csqcfgr3; - u32 csqar1, csqar2; u32 ecc_offset = mtd->writesize + FMC2_BBM_LEN; - u32 pcr = readl_relaxed(nfc->io_base + FMC2_PCR); + /* + * cfg[0] => csqcfgr1, cfg[1] => csqcfgr2, cfg[2] => csqcfgr3 + * cfg[3] => csqar1, cfg[4] => csqar2 + */ + u32 cfg[5]; - if (write_data) - pcr |= FMC2_PCR_WEN; - else - pcr &= ~FMC2_PCR_WEN; - writel_relaxed(pcr, nfc->io_base + FMC2_PCR); + regmap_update_bits(nfc->regmap, FMC2_PCR, FMC2_PCR_WEN, + write_data ? FMC2_PCR_WEN : 0); /* * - Set Program Page/Page Read command * - Enable DMA request data * - Set timings */ - csqcfgr1 = FMC2_CSQCFGR1_DMADEN | FMC2_CSQCFGR1_CMD1T; + cfg[0] = FMC2_CSQCFGR1_DMADEN | FMC2_CSQCFGR1_CMD1T; if (write_data) - csqcfgr1 |= FIELD_PREP(FMC2_CSQCFGR1_CMD1, NAND_CMD_SEQIN); + cfg[0] |= FIELD_PREP(FMC2_CSQCFGR1_CMD1, NAND_CMD_SEQIN); else - csqcfgr1 |= FIELD_PREP(FMC2_CSQCFGR1_CMD1, NAND_CMD_READ0) | - FMC2_CSQCFGR1_CMD2EN | - FIELD_PREP(FMC2_CSQCFGR1_CMD2, NAND_CMD_READSTART) | - FMC2_CSQCFGR1_CMD2T; + cfg[0] |= FIELD_PREP(FMC2_CSQCFGR1_CMD1, NAND_CMD_READ0) | + FMC2_CSQCFGR1_CMD2EN | + FIELD_PREP(FMC2_CSQCFGR1_CMD2, NAND_CMD_READSTART) | + FMC2_CSQCFGR1_CMD2T; /* * - Set Random Data Input/Random Data Read command @@ -796,30 +776,29 @@ static void stm32_fmc2_nfc_rw_page_init(struct nand_chip *chip, int page, * - Set timings */ if (write_data) - csqcfgr2 = FIELD_PREP(FMC2_CSQCFGR2_RCMD1, NAND_CMD_RNDIN); + cfg[1] = FIELD_PREP(FMC2_CSQCFGR2_RCMD1, NAND_CMD_RNDIN); else - csqcfgr2 = FIELD_PREP(FMC2_CSQCFGR2_RCMD1, NAND_CMD_RNDOUT) | - FMC2_CSQCFGR2_RCMD2EN | - FIELD_PREP(FMC2_CSQCFGR2_RCMD2, - NAND_CMD_RNDOUTSTART) | - FMC2_CSQCFGR2_RCMD1T | - FMC2_CSQCFGR2_RCMD2T; + cfg[1] = FIELD_PREP(FMC2_CSQCFGR2_RCMD1, NAND_CMD_RNDOUT) | + FMC2_CSQCFGR2_RCMD2EN | + FIELD_PREP(FMC2_CSQCFGR2_RCMD2, NAND_CMD_RNDOUTSTART) | + FMC2_CSQCFGR2_RCMD1T | + FMC2_CSQCFGR2_RCMD2T; if (!raw) { - csqcfgr2 |= write_data ? 0 : FMC2_CSQCFGR2_DMASEN; - csqcfgr2 |= FMC2_CSQCFGR2_SQSDTEN; + cfg[1] |= write_data ? 0 : FMC2_CSQCFGR2_DMASEN; + cfg[1] |= FMC2_CSQCFGR2_SQSDTEN; } /* * - Set the number of sectors to be written * - Set timings */ - csqcfgr3 = FIELD_PREP(FMC2_CSQCFGR3_SNBR, chip->ecc.steps - 1); + cfg[2] = FIELD_PREP(FMC2_CSQCFGR3_SNBR, chip->ecc.steps - 1); if (write_data) { - csqcfgr3 |= FMC2_CSQCFGR3_RAC2T; + cfg[2] |= FMC2_CSQCFGR3_RAC2T; if (chip->options & NAND_ROW_ADDR_3) - csqcfgr3 |= FMC2_CSQCFGR3_AC5T; + cfg[2] |= FMC2_CSQCFGR3_AC5T; else - csqcfgr3 |= FMC2_CSQCFGR3_AC4T; + cfg[2] |= FMC2_CSQCFGR3_AC4T; } /* @@ -827,8 +806,8 @@ static void stm32_fmc2_nfc_rw_page_init(struct nand_chip *chip, int page, * Byte 1 and byte 2 => column, we start at 0x0 * Byte 3 and byte 4 => page */ - csqar1 = FIELD_PREP(FMC2_CSQCAR1_ADDC3, page); - csqar1 |= FIELD_PREP(FMC2_CSQCAR1_ADDC4, page >> 8); + cfg[3] = FIELD_PREP(FMC2_CSQCAR1_ADDC3, page); + cfg[3] |= FIELD_PREP(FMC2_CSQCAR1_ADDC4, page >> 8); /* * - Set chip enable number @@ -836,23 +815,19 @@ static void stm32_fmc2_nfc_rw_page_init(struct nand_chip *chip, int page, * - Calculate the number of address cycles to be issued * - Set byte 5 of address cycle if needed */ - csqar2 = FIELD_PREP(FMC2_CSQCAR2_NANDCEN, nfc->cs_sel); + cfg[4] = FIELD_PREP(FMC2_CSQCAR2_NANDCEN, nfc->cs_sel); if (chip->options & NAND_BUSWIDTH_16) - csqar2 |= FIELD_PREP(FMC2_CSQCAR2_SAO, ecc_offset >> 1); + cfg[4] |= FIELD_PREP(FMC2_CSQCAR2_SAO, ecc_offset >> 1); else - csqar2 |= FIELD_PREP(FMC2_CSQCAR2_SAO, ecc_offset); + cfg[4] |= FIELD_PREP(FMC2_CSQCAR2_SAO, ecc_offset); if (chip->options & NAND_ROW_ADDR_3) { - csqcfgr1 |= FIELD_PREP(FMC2_CSQCFGR1_ACYNBR, 5); - csqar2 |= FIELD_PREP(FMC2_CSQCAR2_ADDC5, page >> 16); + cfg[0] |= FIELD_PREP(FMC2_CSQCFGR1_ACYNBR, 5); + cfg[4] |= FIELD_PREP(FMC2_CSQCAR2_ADDC5, page >> 16); } else { - csqcfgr1 |= FIELD_PREP(FMC2_CSQCFGR1_ACYNBR, 4); + cfg[0] |= FIELD_PREP(FMC2_CSQCFGR1_ACYNBR, 4); } - writel_relaxed(csqcfgr1, nfc->io_base + FMC2_CSQCFGR1); - writel_relaxed(csqcfgr2, nfc->io_base + FMC2_CSQCFGR2); - writel_relaxed(csqcfgr3, nfc->io_base + FMC2_CSQCFGR3); - writel_relaxed(csqar1, nfc->io_base + FMC2_CSQAR1); - writel_relaxed(csqar2, nfc->io_base + FMC2_CSQAR2); + regmap_bulk_write(nfc->regmap, FMC2_CSQCFGR1, cfg, 5); } static void stm32_fmc2_nfc_dma_callback(void *arg) @@ -870,7 +845,6 @@ static int stm32_fmc2_nfc_xfer(struct nand_chip *chip, const u8 *buf, struct dma_chan *dma_ch = nfc->dma_rx_ch; enum dma_data_direction dma_data_dir = DMA_FROM_DEVICE; enum dma_transfer_direction dma_transfer_dir = DMA_DEV_TO_MEM; - u32 csqcr = readl_relaxed(nfc->io_base + FMC2_CSQCR); int eccsteps = chip->ecc.steps; int eccsize = chip->ecc.size; unsigned long timeout = msecs_to_jiffies(FMC2_TIMEOUT_MS); @@ -948,8 +922,8 @@ static int stm32_fmc2_nfc_xfer(struct nand_chip *chip, const u8 *buf, stm32_fmc2_nfc_enable_seq_irq(nfc); /* Start the transfer */ - csqcr |= FMC2_CSQCR_CSQSTART; - writel_relaxed(csqcr, nfc->io_base + FMC2_CSQCR); + regmap_update_bits(nfc->regmap, FMC2_CSQCR, + FMC2_CSQCR_CSQSTART, FMC2_CSQCR_CSQSTART); /* Wait end of sequencer transfer */ if (!wait_for_completion_timeout(&nfc->complete, timeout)) { @@ -1042,11 +1016,13 @@ static int stm32_fmc2_nfc_seq_write_page_raw(struct nand_chip *chip, } /* Get a status indicating which sectors have errors */ -static inline u16 stm32_fmc2_nfc_get_mapping_status(struct stm32_fmc2_nfc *nfc) +static u16 stm32_fmc2_nfc_get_mapping_status(struct stm32_fmc2_nfc *nfc) { - u32 csqemsr = readl_relaxed(nfc->io_base + FMC2_CSQEMSR); + u32 csqemsr; + + regmap_read(nfc->regmap, FMC2_CSQEMSR, &csqemsr); - return csqemsr & FMC2_CSQEMSR_SEM; + return FIELD_GET(FMC2_CSQEMSR_SEM, csqemsr); } static int stm32_fmc2_nfc_seq_correct(struct nand_chip *chip, u8 *dat, @@ -1302,9 +1278,9 @@ static int stm32_fmc2_nfc_waitrdy(struct nand_chip *chip, u32 isr, sr; /* Check if there is no pending requests to the NAND flash */ - if (readl_relaxed_poll_timeout_atomic(nfc->io_base + FMC2_SR, sr, - sr & FMC2_SR_NWRF, 1, - 1000 * FMC2_TIMEOUT_MS)) + if (regmap_read_poll_timeout(nfc->regmap, FMC2_SR, sr, + sr & FMC2_SR_NWRF, 1, + 1000 * FMC2_TIMEOUT_MS)) dev_warn(nfc->dev, "Waitrdy timeout\n"); /* Wait tWB before R/B# signal is low */ @@ -1312,12 +1288,12 @@ static int stm32_fmc2_nfc_waitrdy(struct nand_chip *chip, ndelay(PSEC_TO_NSEC(timings->tWB_max)); /* R/B# signal is low, clear high level flag */ - writel_relaxed(FMC2_ICR_CIHLF, nfc->io_base + FMC2_ICR); + regmap_write(nfc->regmap, FMC2_ICR, FMC2_ICR_CIHLF); /* Wait R/B# signal is high */ - return readl_relaxed_poll_timeout_atomic(nfc->io_base + FMC2_ISR, - isr, isr & FMC2_ISR_IHLF, - 5, 1000 * timeout_ms); + return regmap_read_poll_timeout(nfc->regmap, FMC2_ISR, isr, + isr & FMC2_ISR_IHLF, 5, + 1000 * FMC2_TIMEOUT_MS); } static int stm32_fmc2_nfc_exec_op(struct nand_chip *chip, @@ -1375,8 +1351,9 @@ static int stm32_fmc2_nfc_exec_op(struct nand_chip *chip, static void stm32_fmc2_nfc_init(struct stm32_fmc2_nfc *nfc) { - u32 pcr = readl_relaxed(nfc->io_base + FMC2_PCR); - u32 bcr1 = readl_relaxed(nfc->io_base + FMC2_BCR1); + u32 pcr; + + regmap_read(nfc->regmap, FMC2_PCR, &pcr); /* Set CS used to undefined */ nfc->cs_sel = -1; @@ -1407,12 +1384,12 @@ static void stm32_fmc2_nfc_init(struct stm32_fmc2_nfc *nfc) pcr |= FIELD_PREP(FMC2_PCR_TAR, FMC2_PCR_TAR_DEFAULT); /* Enable FMC2 controller */ - bcr1 |= FMC2_BCR1_FMC2EN; + regmap_update_bits(nfc->regmap, FMC2_BCR1, + FMC2_BCR1_FMC2EN, FMC2_BCR1_FMC2EN); - writel_relaxed(bcr1, nfc->io_base + FMC2_BCR1); - writel_relaxed(pcr, nfc->io_base + FMC2_PCR); - writel_relaxed(FMC2_PMEM_DEFAULT, nfc->io_base + FMC2_PMEM); - writel_relaxed(FMC2_PATT_DEFAULT, nfc->io_base + FMC2_PATT); + regmap_write(nfc->regmap, FMC2_PCR, pcr); + regmap_write(nfc->regmap, FMC2_PMEM, FMC2_PMEM_DEFAULT); + regmap_write(nfc->regmap, FMC2_PATT, FMC2_PATT_DEFAULT); } static void stm32_fmc2_nfc_calc_timings(struct nand_chip *chip, @@ -1847,6 +1824,7 @@ static int stm32_fmc2_nfc_probe(struct platform_device *pdev) struct resource *res; struct mtd_info *mtd; struct nand_chip *chip; + void __iomem *mmio; int chip_cs, mem_region, ret, irq; nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL); @@ -1862,9 +1840,13 @@ static int stm32_fmc2_nfc_probe(struct platform_device *pdev) return ret; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - nfc->io_base = devm_ioremap_resource(dev, res); - if (IS_ERR(nfc->io_base)) - return PTR_ERR(nfc->io_base); + mmio = devm_ioremap_resource(dev, res); + if (IS_ERR(mmio)) + return PTR_ERR(mmio); + + nfc->regmap = devm_regmap_init_mmio(dev, mmio, &stm32_fmc2_regmap_cfg); + if (IS_ERR(nfc->regmap)) + return PTR_ERR(nfc->regmap); nfc->io_phys_addr = res->start; 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