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| author |   Pekon Gupta <pekon@ti.com> | 2014-03-20 18:48:35 +0530 |
|---|---|---|
| committer |   Brian Norris <computersforpeace@gmail.com> | 2014-03-25 23:08:57 -0700 |
| commit | ea0760244d235688b5fae4e5cdd9412c1fb1c2fe (patch) | |
| tree | f5f0a7b83f316d0ba400450e9073c7f45e14907d /drivers/mtd/devices | |
| parent | mtd: devices: elm: check for hardware engine's design constraints (diff) | |
| download | linux-dev-ea0760244d235688b5fae4e5cdd9412c1fb1c2fe.tar.xz linux-dev-ea0760244d235688b5fae4e5cdd9412c1fb1c2fe.zip | |
mtd: devices: elm: clean elm_load_syndrome
This patch refactors elm_load_syndrome() to make it scalable for newer
ECC schemes by removing scheme specific macros (like ECC_BYTES*xx),
and instead using ECC control information passed during elm_config.
Signed-off-by: Pekon Gupta <pekon@ti.com>
Reviewed-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/devices')
| -rw-r--r-- | drivers/mtd/devices/elm.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/mtd/devices/elm.c b/drivers/mtd/devices/elm.c index c51752ad072e..4fbfaf65fabd 100644 --- a/drivers/mtd/devices/elm.c +++ b/drivers/mtd/devices/elm.c @@ -84,6 +84,7 @@ struct elm_info { struct list_head list; enum bch_ecc bch_type; struct elm_registers elm_regs; + int ecc_syndrome_size; }; static LIST_HEAD(elm_devices); @@ -126,7 +127,8 @@ int elm_config(struct device *dev, enum bch_ecc bch_type, reg_val = (bch_type & ECC_BCH_LEVEL_MASK) | (ELM_ECC_SIZE << 16); elm_write_reg(info, ELM_LOCATION_CONFIG, reg_val); - info->bch_type = bch_type; + info->bch_type = bch_type; + info->ecc_syndrome_size = ecc_syndrome_size; return 0; } @@ -175,10 +177,8 @@ static void elm_load_syndrome(struct elm_info *info, elm_configure_page_mode(info, i, true); offset = ELM_SYNDROME_FRAGMENT_0 + SYNDROME_FRAGMENT_REG_SIZE * i; - - /* BCH8 */ - if (info->bch_type) { - + switch (info->bch_type) { + case BCH8_ECC: /* syndrome fragment 0 = ecc[9-12B] */ val = cpu_to_be32(*(u32 *) &ecc[9]); elm_write_reg(info, offset, val); @@ -197,7 +197,8 @@ static void elm_load_syndrome(struct elm_info *info, offset += 4; val = ecc[0]; elm_write_reg(info, offset, val); - } else { + break; + case BCH4_ECC: /* syndrome fragment 0 = ecc[20-52b] bits */ val = (cpu_to_be32(*(u32 *) &ecc[3]) >> 4) | ((ecc[2] & 0xf) << 28); @@ -207,11 +208,14 @@ static void elm_load_syndrome(struct elm_info *info, offset += 4; val = cpu_to_be32(*(u32 *) &ecc[0]) >> 12; elm_write_reg(info, offset, val); + break; + default: + pr_err("invalid config bch_type\n"); } } /* Update ecc pointer with ecc byte size */ - ecc += info->bch_type ? BCH8_SIZE : BCH4_SIZE; + ecc += info->ecc_syndrome_size; } } |