diff options
| author | Lee Jones <lee.jones@linaro.org> | 2014-03-20 09:21:05 +0000 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-03-20 04:17:21 -0700 |
| commit | cd7cac9ec3b691e6e0aca92f7c97e5cbb390d17c (patch) | |
| tree | e91f20038a4aa78c4dd4baec596fc84b219618bd /drivers | |
| parent | 5343a1234513443edcb3fb55969f4ae415fc41a2 (diff) | |
| download | linux-cd7cac9ec3b691e6e0aca92f7c97e5cbb390d17c.tar.bz2 | |
mtd: st_spi_fsm: Supply the W25Qxxx chip specific configuration call-back
Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/devices/st_spi_fsm.c | 47 |
1 files changed, 43 insertions, 4 deletions
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index 9db564106e3e..dc9412a93abd 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -341,6 +341,7 @@ struct flash_info { static int stfsm_n25q_config(struct stfsm *fsm); static int stfsm_mx25_config(struct stfsm *fsm); static int stfsm_s25fl_config(struct stfsm *fsm); +static int stfsm_w25q_config(struct stfsm *fsm); static struct flash_info flash_types[] = { /* @@ -446,10 +447,14 @@ static struct flash_info flash_types[] = { FLASH_FLAG_READ_1_1_4 | \ FLASH_FLAG_READ_1_4_4 | \ FLASH_FLAG_WRITE_1_1_4) - { "w25q80", 0xef4014, 0, 64 * 1024, 16, W25Q_FLAG, 80, NULL }, - { "w25q16", 0xef4015, 0, 64 * 1024, 32, W25Q_FLAG, 80, NULL }, - { "w25q32", 0xef4016, 0, 64 * 1024, 64, W25Q_FLAG, 80, NULL }, - { "w25q64", 0xef4017, 0, 64 * 1024, 128, W25Q_FLAG, 80, NULL }, + { "w25q80", 0xef4014, 0, 64 * 1024, 16, W25Q_FLAG, 80, + stfsm_w25q_config }, + { "w25q16", 0xef4015, 0, 64 * 1024, 32, W25Q_FLAG, 80, + stfsm_w25q_config }, + { "w25q32", 0xef4016, 0, 64 * 1024, 64, W25Q_FLAG, 80, + stfsm_w25q_config }, + { "w25q64", 0xef4017, 0, 64 * 1024, 128, W25Q_FLAG, 80, + stfsm_w25q_config }, /* Sentinel */ { NULL, 0x000000, 0, 0, 0, 0, 0, NULL }, @@ -577,6 +582,11 @@ static struct seq_rw_config stfsm_s25fl_write4_configs[] = { {0x00, 0, 0, 0, 0, 0x00, 0, 0}, }; +/* + * [W25Qxxx] Configuration + */ +#define W25Q_STATUS_QE (0x1 << 9) + static struct stfsm_seq stfsm_seq_read; /* Dynamically populated */ static struct stfsm_seq stfsm_seq_write; /* Dynamically populated */ static struct stfsm_seq stfsm_seq_en_32bit_addr;/* Dynamically populated */ @@ -1443,6 +1453,35 @@ static int stfsm_s25fl_config(struct stfsm *fsm) return 0; } +static int stfsm_w25q_config(struct stfsm *fsm) +{ + uint32_t data_pads; + uint16_t sta_wr; + uint8_t sta1, sta2; + int ret; + + ret = stfsm_prepare_rwe_seqs_default(fsm); + if (ret) + return ret; + + /* If using QUAD mode, set QE STATUS bit */ + data_pads = ((stfsm_seq_read.seq_cfg >> 16) & 0x3) + 1; + if (data_pads == 4) { + stfsm_read_status(fsm, FLASH_CMD_RDSR, &sta1); + stfsm_read_status(fsm, FLASH_CMD_RDSR2, &sta2); + + sta_wr = ((uint16_t)sta2 << 8) | sta1; + + sta_wr |= W25Q_STATUS_QE; + + stfsm_write_status(fsm, sta_wr, 2); + + stfsm_wait_busy(fsm); + } + + return 0; +} + static int stfsm_read(struct stfsm *fsm, uint8_t *buf, uint32_t size, uint32_t offset) { |