From: Mike Frysinger Date: Mon, 10 Jan 2011 07:20:12 +0000 (-0500) Subject: sf: unify status polling for ready bit X-Git-Tag: v2011.06-rc1~178 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6163045bcd276818d9ad6bdd1bf36ddcd60d014b;p=platform%2Fkernel%2Fu-boot.git sf: unify status polling for ready bit All of the spi flash drivers implement the status register polling for detecting the device ready state, so unify them all in a new helper function -- spi_flash_wait_ready. Signed-off-by: Mike Frysinger --- diff --git a/drivers/mtd/spi/atmel.c b/drivers/mtd/spi/atmel.c index 8d02169..7827b75 100644 --- a/drivers/mtd/spi/atmel.c +++ b/drivers/mtd/spi/atmel.c @@ -113,35 +113,8 @@ static const struct atmel_spi_flash_params atmel_spi_flash_table[] = { static int at45_wait_ready(struct spi_flash *flash, unsigned long timeout) { - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 cmd = CMD_AT45_READ_STATUS; - u8 status; - - timebase = get_timer(0); - - ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); - if (ret) - return -1; - - do { - ret = spi_xfer(spi, 8, NULL, &status, 0); - if (ret) - return -1; - - if (status & AT45_STATUS_READY) - break; - } while (get_timer(timebase) < timeout); - - /* Deactivate CS */ - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if (status & AT45_STATUS_READY) - return 0; - - /* Timed out */ - return -1; + return spi_flash_cmd_poll_bit(flash, timeout, + CMD_AT45_READ_STATUS, AT45_STATUS_READY); } /* diff --git a/drivers/mtd/spi/eon.c b/drivers/mtd/spi/eon.c index 02c3bb9..4af1e06 100644 --- a/drivers/mtd/spi/eon.c +++ b/drivers/mtd/spi/eon.c @@ -25,8 +25,6 @@ #define EON_ID_EN25Q128 0x18 -#define EON_SR_WIP (1 << 0) /* Write-in-Progress */ - struct eon_spi_flash_params { u8 idcode1; u16 page_size; @@ -58,40 +56,6 @@ static const struct eon_spi_flash_params eon_spi_flash_table[] = { }, }; -static int eon_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 cmd = CMD_EN25Q128_RDSR; - u8 status; - - ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); - if (ret) { - debug("SF: Failed to send command %02x: %d\n", cmd, ret); - return ret; - } - - timebase = get_timer(0); - do { - ret = spi_xfer(spi, 8, NULL, &status, 0); - if (ret) - return -1; - - if ((status & EON_SR_WIP) == 0) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if ((status & EON_SR_WIP) == 0) - return 0; - - /* Timed out */ - return -1; -} - static int eon_read_fast(struct spi_flash *flash, u32 offset, size_t len, void *buf) { @@ -160,11 +124,9 @@ static int eon_write(struct spi_flash *flash, break; } - ret = eon_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); - if (ret < 0) { - debug("SF: EON page programming timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret) break; - } page_addr++; byte_addr = 0; @@ -221,11 +183,9 @@ int eon_erase(struct spi_flash *flash, u32 offset, size_t len) break; } - ret = eon_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); - if (ret < 0) { - debug("SF: EON page erase timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + if (ret) break; - } } debug("SF: EON: Successfully erased %u bytes @ 0x%x\n", diff --git a/drivers/mtd/spi/macronix.c b/drivers/mtd/spi/macronix.c index 76d5284..291fd17 100644 --- a/drivers/mtd/spi/macronix.c +++ b/drivers/mtd/spi/macronix.c @@ -49,8 +49,6 @@ #define CMD_MX25XX_DP 0xb9 /* Deep Power-down */ #define CMD_MX25XX_RES 0xab /* Release from DP, and Read Signature */ -#define MACRONIX_SR_WIP (1 << 0) /* Write-in-Progress */ - struct macronix_spi_flash_params { u16 idcode; u16 page_size; @@ -114,40 +112,6 @@ static const struct macronix_spi_flash_params macronix_spi_flash_table[] = { }, }; -static int macronix_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 status; - u8 cmd = CMD_MX25XX_RDSR; - - ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); - if (ret) { - debug("SF: Failed to send command %02x: %d\n", cmd, ret); - return ret; - } - - timebase = get_timer(0); - do { - ret = spi_xfer(spi, 8, NULL, &status, 0); - if (ret) - return -1; - - if ((status & MACRONIX_SR_WIP) == 0) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if ((status & MACRONIX_SR_WIP) == 0) - return 0; - - /* Timed out */ - return -1; -} - static int macronix_read_fast(struct spi_flash *flash, u32 offset, size_t len, void *buf) { @@ -216,11 +180,9 @@ static int macronix_write(struct spi_flash *flash, break; } - ret = macronix_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); - if (ret < 0) { - debug("SF: Macronix page programming timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret) break; - } page_addr++; byte_addr = 0; @@ -282,11 +244,9 @@ int macronix_erase(struct spi_flash *flash, u32 offset, size_t len) break; } - ret = macronix_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); - if (ret < 0) { - debug("SF: Macronix page erase timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + if (ret) break; - } } debug("SF: Macronix: Successfully erased %u bytes @ 0x%x\n", diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c index c0900f9..d0f03ff 100644 --- a/drivers/mtd/spi/spansion.c +++ b/drivers/mtd/spi/spansion.c @@ -54,8 +54,6 @@ #define SPSN_EXT_ID_S25FL128P_64KB 0x0301 #define SPSN_EXT_ID_S25FL032P 0x4d00 -#define SPANSION_SR_WIP (1 << 0) /* Write-in-Progress */ - struct spansion_spi_flash_params { u16 idcode1; u16 idcode2; @@ -135,32 +133,6 @@ static const struct spansion_spi_flash_params spansion_spi_flash_table[] = { }, }; -static int spansion_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 status; - - timebase = get_timer(0); - do { - ret = spi_flash_cmd(spi, CMD_S25FLXX_RDSR, &status, sizeof(status)); - if (ret) - return -1; - - if ((status & SPANSION_SR_WIP) == 0) - break; - - } while (get_timer(timebase) < timeout); - - - if ((status & SPANSION_SR_WIP) == 0) - return 0; - - /* Timed out */ - return -1; -} - static int spansion_read_fast(struct spi_flash *flash, u32 offset, size_t len, void *buf) { @@ -233,11 +205,9 @@ static int spansion_write(struct spi_flash *flash, break; } - ret = spansion_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); - if (ret < 0) { - debug("SF: SPANSION page programming timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret) break; - } page_addr++; byte_addr = 0; @@ -297,12 +267,9 @@ int spansion_erase(struct spi_flash *flash, u32 offset, size_t len) break; } - /* Up to 2 seconds */ - ret = spansion_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); - if (ret < 0) { - debug("SF: SPANSION page erase timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + if (ret) break; - } } debug("SF: SPANSION: Successfully erased %u bytes @ 0x%x\n", diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 2b7f22c..e483ce4 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -69,6 +69,47 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, return ret; } +int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout, + u8 cmd, u8 poll_bit) +{ + struct spi_slave *spi = flash->spi; + unsigned long timebase; + int ret; + u8 status; + + ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); + if (ret) { + debug("SF: Failed to send command %02x: %d\n", cmd, ret); + return ret; + } + + timebase = get_timer(0); + do { + ret = spi_xfer(spi, 8, NULL, &status, 0); + if (ret) + return -1; + + if ((status & poll_bit) == 0) + break; + + } while (get_timer(timebase) < timeout); + + spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); + + if ((status & poll_bit) == 0) + return 0; + + /* Timed out */ + debug("SF: time out!\n"); + return -1; +} + +int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) +{ + return spi_flash_cmd_poll_bit(flash, timeout, + CMD_READ_STATUS, STATUS_WIP); +} + /* * The following table holds all device probe functions * diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h index 68dcffb..440c044 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -19,6 +19,11 @@ #define CMD_READ_ARRAY_FAST 0x0b #define CMD_READ_ARRAY_LEGACY 0xe8 +#define CMD_READ_STATUS 0x05 + +/* Common status */ +#define STATUS_WIP 0x01 + /* Send a single-byte command to the device and read the response */ int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len); @@ -43,6 +48,16 @@ int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, size_t cmd_len, void *data, size_t data_len); +/* Send a command to the device and wait for some bit to clear itself. */ +int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout, + u8 cmd, u8 poll_bit); + +/* + * Send the read status command to the device and wait for the wip + * (write-in-progress) bit to clear itself. + */ +int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout); + /* Manufacturer-specific probe functions */ struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode); struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode); diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c index 2557891..4a82f8a3 100644 --- a/drivers/mtd/spi/sst.c +++ b/drivers/mtd/spi/sst.c @@ -90,41 +90,6 @@ static const struct sst_spi_flash_params sst_spi_flash_table[] = { }; static int -sst_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 byte = CMD_SST_RDSR; - - ret = spi_xfer(spi, sizeof(byte) * 8, &byte, NULL, SPI_XFER_BEGIN); - if (ret) { - debug("SF: Failed to send command %02x: %d\n", byte, ret); - return ret; - } - - timebase = get_timer(0); - do { - ret = spi_xfer(spi, sizeof(byte) * 8, NULL, &byte, 0); - if (ret) - break; - - if ((byte & SST_SR_WIP) == 0) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if (!ret && (byte & SST_SR_WIP) != 0) - ret = -1; - - if (ret) - debug("SF: sst wait for ready timed out\n"); - return ret; -} - -static int sst_enable_writing(struct spi_flash *flash) { int ret = spi_flash_cmd(flash->spi, CMD_SST_WREN, NULL, 0); @@ -177,7 +142,7 @@ sst_byte_write(struct spi_flash *flash, u32 offset, const void *buf) if (ret) return ret; - return sst_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + return spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); } static int @@ -224,7 +189,7 @@ sst_write(struct spi_flash *flash, u32 offset, size_t len, const void *buf) break; } - ret = sst_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); if (ret) break; @@ -298,7 +263,7 @@ sst_erase(struct spi_flash *flash, u32 offset, size_t len) break; } - ret = sst_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); if (ret) break; } diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c index 3134027..02da8b2 100644 --- a/drivers/mtd/spi/stmicro.c +++ b/drivers/mtd/spi/stmicro.c @@ -55,8 +55,6 @@ #define STM_ID_M25P80 0x14 #define STM_ID_M25P128 0x18 -#define STMICRO_SR_WIP (1 << 0) /* Write-in-Progress */ - struct stmicro_spi_flash_params { u8 idcode1; u16 page_size; @@ -136,40 +134,6 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = { }, }; -static int stmicro_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 cmd = CMD_M25PXX_RDSR; - u8 status; - - ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); - if (ret) { - debug("SF: Failed to send command %02x: %d\n", cmd, ret); - return ret; - } - - timebase = get_timer(0); - do { - ret = spi_xfer(spi, 8, NULL, &status, 0); - if (ret) - return -1; - - if ((status & STMICRO_SR_WIP) == 0) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if ((status & STMICRO_SR_WIP) == 0) - return 0; - - /* Timed out */ - return -1; -} - static int stmicro_read_fast(struct spi_flash *flash, u32 offset, size_t len, void *buf) { @@ -238,11 +202,9 @@ static int stmicro_write(struct spi_flash *flash, break; } - ret = stmicro_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); - if (ret < 0) { - debug("SF: STMicro page programming timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret) break; - } page_addr++; byte_addr = 0; @@ -304,11 +266,9 @@ int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len) break; } - ret = stmicro_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); - if (ret < 0) { - debug("SF: STMicro page erase timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + if (ret) break; - } } debug("SF: STMicro: Successfully erased %u bytes @ 0x%x\n", diff --git a/drivers/mtd/spi/winbond.c b/drivers/mtd/spi/winbond.c index 4452355..d8c1cb1 100644 --- a/drivers/mtd/spi/winbond.c +++ b/drivers/mtd/spi/winbond.c @@ -24,8 +24,6 @@ #define CMD_W25_DP 0xb9 /* Deep Power-down */ #define CMD_W25_RES 0xab /* Release from DP, and Read Signature */ -#define WINBOND_SR_WIP (1 << 0) /* Write-in-Progress */ - struct winbond_spi_flash_params { uint16_t id; /* Log2 of page size in power-of-two mode */ @@ -107,43 +105,6 @@ static const struct winbond_spi_flash_params winbond_spi_flash_table[] = { }, }; -static int winbond_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 status; - u8 cmd[4] = { CMD_W25_RDSR, 0xff, 0xff, 0xff }; - - ret = spi_xfer(spi, 32, &cmd[0], NULL, SPI_XFER_BEGIN); - if (ret) { - debug("SF: Failed to send command %02x: %d\n", cmd, ret); - return ret; - } - - timebase = get_timer(0); - do { - ret = spi_xfer(spi, 8, NULL, &status, 0); - if (ret) { - debug("SF: Failed to get status for cmd %02x: %d\n", cmd, ret); - return -1; - } - - if ((status & WINBOND_SR_WIP) == 0) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if ((status & WINBOND_SR_WIP) == 0) - return 0; - - debug("SF: Timed out on command %02x: %d\n", cmd, ret); - /* Timed out */ - return -1; -} - /* * Assemble the address part of a command for Winbond devices in * non-power-of-two page size mode. @@ -230,11 +191,9 @@ static int winbond_write(struct spi_flash *flash, goto out; } - ret = winbond_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); - if (ret < 0) { - debug("SF: Winbond page programming timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret) goto out; - } page_addr++; byte_addr = 0; @@ -298,11 +257,9 @@ int winbond_erase(struct spi_flash *flash, u32 offset, size_t len) goto out; } - ret = winbond_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); - if (ret < 0) { - debug("SF: Winbond sector erase timed out\n"); + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + if (ret) goto out; - } } debug("SF: Winbond: Successfully erased %u bytes @ 0x%x\n",