mtd: rawnand: denali: use more nand_chip pointers for internal functions

With the recent refactoring, the NAND driver hooks now take a pointer
to nand_chip. Add to_denali() in order to convert (struct nand_chip *)
to (struct denali_nand_info *) directly. It is more useful than the
current mtd_to_denali().

I changed some helper functions to take (struct nand_chip *). This will
avoid pointer conversion back and forth, and ease further development.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

diff --git a/drivers/mtd/nand/raw/denali.c b/drivers/mtd/nand/raw/denali.c
index be1cc064bdb487657d57dfeb4ab53f6193b90459..82a6666fd47baee5b25e21fbe4a2a84fdbb877be 100644 (file)
--- a/drivers/mtd/nand/raw/denali.c
+++ b/drivers/mtd/nand/raw/denali.c
@@ -47,6 +47,11 @@ static inline struct denali_nand_info *mtd_to_denali(struct mtd_info *mtd)
        return container_of(mtd_to_nand(mtd), struct denali_nand_info, nand);
 }
 
+static struct denali_nand_info *to_denali(struct nand_chip *chip)
+{
+       return container_of(chip, struct denali_nand_info, nand);
+}
+
 /*
  * Direct Addressing - the slave address forms the control information (command
  * type, bank, block, and page address).  The slave data is the actual data to
@@ -282,12 +287,12 @@ static void denali_cmd_ctrl(struct nand_chip *chip, int dat, unsigned int ctrl)
        denali->host_write(denali, DENALI_BANK(denali) | type, dat);
 }
 
-static int denali_check_erased_page(struct mtd_info *mtd,
-                                   struct nand_chip *chip, uint8_t *buf,
+static int denali_check_erased_page(struct nand_chip *chip, u8 *buf,
                                    unsigned long uncor_ecc_flags,
                                    unsigned int max_bitflips)
 {
-       struct denali_nand_info *denali = mtd_to_denali(mtd);
+       struct denali_nand_info *denali = to_denali(chip);
+       struct mtd_ecc_stats *ecc_stats = &nand_to_mtd(chip)->ecc_stats;
        uint8_t *ecc_code = chip->oob_poi + denali->oob_skip_bytes;
        int ecc_steps = chip->ecc.steps;
        int ecc_size = chip->ecc.size;
@@ -303,9 +308,9 @@ static int denali_check_erased_page(struct mtd_info *mtd,
                                                  NULL, 0,
                                                  chip->ecc.strength);
                if (stat < 0) {
-                       mtd->ecc_stats.failed++;
+                       ecc_stats->failed++;
                } else {
-                       mtd->ecc_stats.corrected += stat;
+                       ecc_stats->corrected += stat;
                        max_bitflips = max_t(unsigned int, max_bitflips, stat);
                }
 
@@ -316,11 +321,11 @@ static int denali_check_erased_page(struct mtd_info *mtd,
        return max_bitflips;
 }
 
-static int denali_hw_ecc_fixup(struct mtd_info *mtd,
-                              struct denali_nand_info *denali,
+static int denali_hw_ecc_fixup(struct nand_chip *chip,
                               unsigned long *uncor_ecc_flags)
 {
-       struct nand_chip *chip = mtd_to_nand(mtd);
+       struct denali_nand_info *denali = to_denali(chip);
+       struct mtd_ecc_stats *ecc_stats = &nand_to_mtd(chip)->ecc_stats;
        int bank = denali->active_bank;
        uint32_t ecc_cor;
        unsigned int max_bitflips;
@@ -346,16 +351,17 @@ static int denali_hw_ecc_fixup(struct mtd_info *mtd,
         * Unfortunately, we can not know the total number of corrected bits in
         * the page.  Increase the stats by max_bitflips. (compromised solution)
         */
-       mtd->ecc_stats.corrected += max_bitflips;
+       ecc_stats->corrected += max_bitflips;
 
        return max_bitflips;
 }
 
-static int denali_sw_ecc_fixup(struct mtd_info *mtd,
-                              struct denali_nand_info *denali,
+static int denali_sw_ecc_fixup(struct nand_chip *chip,
                               unsigned long *uncor_ecc_flags, uint8_t *buf)
 {
-       unsigned int ecc_size = denali->nand.ecc.size;
+       struct denali_nand_info *denali = to_denali(chip);
+       struct mtd_ecc_stats *ecc_stats = &nand_to_mtd(chip)->ecc_stats;
+       unsigned int ecc_size = chip->ecc.size;
        unsigned int bitflips = 0;
        unsigned int max_bitflips = 0;
        uint32_t err_addr, err_cor_info;
@@ -404,7 +410,7 @@ static int denali_sw_ecc_fixup(struct mtd_info *mtd,
                        /* correct the ECC error */
                        flips_in_byte = hweight8(buf[offset] ^ err_cor_value);
                        buf[offset] ^= err_cor_value;
-                       mtd->ecc_stats.corrected += flips_in_byte;
+                       ecc_stats->corrected += flips_in_byte;
                        bitflips += flips_in_byte;
 
                        max_bitflips = max(max_bitflips, bitflips);
@@ -587,9 +593,11 @@ static int denali_dma_xfer(struct denali_nand_info *denali, void *buf,
        return ret;
 }
 
-static int denali_data_xfer(struct denali_nand_info *denali, void *buf,
-                           size_t size, int page, int raw, int write)
+static int denali_data_xfer(struct nand_chip *chip, void *buf, size_t size,
+                           int page, int raw, int write)
 {
+       struct denali_nand_info *denali = to_denali(chip);
+
        iowrite32(raw ? 0 : ECC_ENABLE__FLAG, denali->reg + ECC_ENABLE);
        iowrite32(raw ? TRANSFER_SPARE_REG__FLAG : 0,
                  denali->reg + TRANSFER_SPARE_REG);
@@ -678,7 +686,7 @@ static int denali_read_page_raw(struct nand_chip *chip, uint8_t *buf,
        size_t size = writesize + oobsize;
        int ret, i, pos, len;
 
-       ret = denali_data_xfer(denali, tmp_buf, size, page, 1, 0);
+       ret = denali_data_xfer(chip, tmp_buf, size, page, 1, 0);
        if (ret)
                return ret;
 
@@ -766,14 +774,14 @@ static int denali_read_page(struct nand_chip *chip, uint8_t *buf,
        int stat = 0;
        int ret;
 
-       ret = denali_data_xfer(denali, buf, mtd->writesize, page, 0, 0);
+       ret = denali_data_xfer(chip, buf, mtd->writesize, page, 0, 0);
        if (ret && ret != -EBADMSG)
                return ret;
 
        if (denali->caps & DENALI_CAP_HW_ECC_FIXUP)
-               stat = denali_hw_ecc_fixup(mtd, denali, &uncor_ecc_flags);
+               stat = denali_hw_ecc_fixup(chip, &uncor_ecc_flags);
        else if (ret == -EBADMSG)
-               stat = denali_sw_ecc_fixup(mtd, denali, &uncor_ecc_flags, buf);
+               stat = denali_sw_ecc_fixup(chip, &uncor_ecc_flags, buf);
 
        if (stat < 0)
                return stat;
@@ -783,7 +791,7 @@ static int denali_read_page(struct nand_chip *chip, uint8_t *buf,
                if (ret)
                        return ret;
 
-               stat = denali_check_erased_page(mtd, chip, buf,
+               stat = denali_check_erased_page(chip, buf,
                                                uncor_ecc_flags, stat);
        }
 
@@ -866,17 +874,16 @@ static int denali_write_page_raw(struct nand_chip *chip, const uint8_t *buf,
                memcpy(tmp_buf + size - len, oob, len);
        }
 
-       return denali_data_xfer(denali, tmp_buf, size, page, 1, 1);
+       return denali_data_xfer(chip, tmp_buf, size, page, 1, 1);
 }
 
 static int denali_write_page(struct nand_chip *chip, const uint8_t *buf,
                             int oob_required, int page)
 {
        struct mtd_info *mtd = nand_to_mtd(chip);
-       struct denali_nand_info *denali = mtd_to_denali(mtd);
 
-       return denali_data_xfer(denali, (void *)buf, mtd->writesize,
-                               page, 0, 1);
+       return denali_data_xfer(chip, (void *)buf, mtd->writesize, page,
+                               0, 1);
 }
 
 static void denali_select_chip(struct nand_chip *chip, int cs)
@@ -1092,9 +1099,9 @@ static const struct mtd_ooblayout_ops denali_ooblayout_ops = {
        .free = denali_ooblayout_free,
 };
 
-static int denali_multidev_fixup(struct denali_nand_info *denali)
+static int denali_multidev_fixup(struct nand_chip *chip)
 {
-       struct nand_chip *chip = &denali->nand;
+       struct denali_nand_info *denali = to_denali(chip);
        struct mtd_info *mtd = nand_to_mtd(chip);
        struct nand_memory_organization *memorg;
 
@@ -1226,7 +1233,7 @@ static int denali_attach_chip(struct nand_chip *chip)
        chip->ecc.read_oob = denali_read_oob;
        chip->ecc.write_oob = denali_write_oob;
 
-       ret = denali_multidev_fixup(denali);
+       ret = denali_multidev_fixup(chip);
        if (ret)
                return ret;