From a37b2f5aee630b35deccb4841a4d60fa45c15b3e Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Thu, 20 Mar 2014 09:20:53 +0000 Subject: [PATCH] mtd: st_spi_fsm: Provide the default read/write configurations Message sequences can vary depending on how many pads (lines) are required to address the chip (mode & dummy), how many data pads (lines) are required to write out to the chip which will determine speed amongst other things which are detailed by the SFDP specification. We are able to use multiple configurations for each chip, but they need to me matched to a device's capabilities. These configurations are listed in preference order - most preferred first. Acked-by Angus Clark Signed-off-by: Lee Jones Signed-off-by: Brian Norris --- drivers/mtd/devices/st_spi_fsm.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index 5683443e7261..03b49a44970d 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -375,6 +375,33 @@ static struct flash_info flash_types[] = { { NULL, 0x000000, 0, 0, 0, 0, 0, NULL }, }; +/* + * FSM message sequence configurations: + * + * All configs are presented in order of preference + */ + +/* Default READ configurations, in order of preference */ +static struct seq_rw_config default_read_configs[] = { + {FLASH_FLAG_READ_1_4_4, FLASH_CMD_READ_1_4_4, 0, 4, 4, 0x00, 2, 4}, + {FLASH_FLAG_READ_1_1_4, FLASH_CMD_READ_1_1_4, 0, 1, 4, 0x00, 4, 0}, + {FLASH_FLAG_READ_1_2_2, FLASH_CMD_READ_1_2_2, 0, 2, 2, 0x00, 4, 0}, + {FLASH_FLAG_READ_1_1_2, FLASH_CMD_READ_1_1_2, 0, 1, 2, 0x00, 0, 8}, + {FLASH_FLAG_READ_FAST, FLASH_CMD_READ_FAST, 0, 1, 1, 0x00, 0, 8}, + {FLASH_FLAG_READ_WRITE, FLASH_CMD_READ, 0, 1, 1, 0x00, 0, 0}, + {0x00, 0, 0, 0, 0, 0x00, 0, 0}, +}; + +/* Default WRITE configurations */ +static struct seq_rw_config default_write_configs[] = { + {FLASH_FLAG_WRITE_1_4_4, FLASH_CMD_WRITE_1_4_4, 1, 4, 4, 0x00, 0, 0}, + {FLASH_FLAG_WRITE_1_1_4, FLASH_CMD_WRITE_1_1_4, 1, 1, 4, 0x00, 0, 0}, + {FLASH_FLAG_WRITE_1_2_2, FLASH_CMD_WRITE_1_2_2, 1, 2, 2, 0x00, 0, 0}, + {FLASH_FLAG_WRITE_1_1_2, FLASH_CMD_WRITE_1_1_2, 1, 1, 2, 0x00, 0, 0}, + {FLASH_FLAG_READ_WRITE, FLASH_CMD_WRITE, 1, 1, 1, 0x00, 0, 0}, + {0x00, 0, 0, 0, 0, 0x00, 0, 0}, +}; + static struct stfsm_seq stfsm_seq_en_32bit_addr;/* Dynamically populated */ static struct stfsm_seq stfsm_seq_read_jedec = { -- 2.34.1