[U-Boot] [PATCH v3 1/4] sf: Unify spi_flash write code
Jagan Teki
jagannadh.teki at gmail.com
Sun Jun 23 20:05:05 CEST 2013
On 21-06-2013 19:19, Jagannadha Sutradharudu Teki wrote:
> Move common flash write code into spi_flash_write_common().
>
> Signed-off-by: Jagannadha Sutradharudu Teki <jaganna at xilinx.com>
> Acked-by: Simon Glass <sjg at chromium.org>
> ---
> Changes for v3:
> - Used proper comments on spi_flash_write_common
> Changes for v2:
> -
>
> drivers/mtd/spi/spi_flash.c | 120 ++++++++++++++++-------------------
> drivers/mtd/spi/spi_flash_internal.h | 10 +++
> 2 files changed, 63 insertions(+), 67 deletions(-)
>
> diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
> index 6ce82c1..03cecef 100644
> --- a/drivers/mtd/spi/spi_flash.c
> +++ b/drivers/mtd/spi/spi_flash.c
> @@ -68,15 +68,15 @@ int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
> return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
> }
>
> -int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
> - size_t len, const void *buf)
> +int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
> + size_t cmd_len, const void *buf, size_t buf_len)
> {
> - unsigned long byte_addr, page_size;
> - size_t chunk_len, actual;
> + struct spi_slave *spi = flash->spi;
> + unsigned long timeout = SPI_FLASH_PROG_TIMEOUT;
> int ret;
> - u8 cmd[4];
>
> - page_size = flash->page_size;
> + if (buf == NULL)
> + timeout = SPI_FLASH_PAGE_ERASE_TIMEOUT;
>
> ret = spi_claim_bus(flash->spi);
> if (ret) {
> @@ -84,6 +84,41 @@ int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
> return ret;
> }
>
> + ret = spi_flash_cmd_write_enable(flash);
> + if (ret < 0) {
> + debug("SF: enabling write failed\n");
> + return ret;
> + }
> +
> + ret = spi_flash_cmd_write(spi, cmd, cmd_len, buf, buf_len);
> + if (ret < 0) {
> + debug("SF: write cmd failed\n");
> + return ret;
> + }
> +
> + ret = spi_flash_cmd_wait_ready(flash, timeout);
> + if (ret < 0) {
> + debug("SF: write %s timed out\n",
> + timeout == SPI_FLASH_PROG_TIMEOUT ?
> + "program" : "page erase");
> + return ret;
> + }
> +
> + spi_release_bus(spi);
> +
> + return ret;
> +}
> +
> +int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
> + size_t len, const void *buf)
> +{
> + unsigned long byte_addr, page_size;
> + size_t chunk_len, actual;
> + u8 cmd[4];
> + int ret = -1;
> +
> + page_size = flash->page_size;
> +
> cmd[0] = CMD_PAGE_PROGRAM;
> for (actual = 0; actual < len; actual += chunk_len) {
> #ifdef CONFIG_SPI_FLASH_BAR
> @@ -108,27 +143,16 @@ int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
> debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
> buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
>
> - ret = spi_flash_cmd_write_enable(flash);
> - if (ret < 0) {
> - debug("SF: enabling write failed\n");
> - break;
> - }
> -
> - ret = spi_flash_cmd_write(flash->spi, cmd, 4,
> - buf + actual, chunk_len);
> + ret = spi_flash_write_common(flash, cmd, sizeof(cmd),
> + buf + actual, chunk_len);
> if (ret < 0) {
> debug("SF: write failed\n");
> break;
> }
>
> - ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
> - if (ret)
> - break;
> -
> offset += chunk_len;
> }
>
> - spi_release_bus(flash->spi);
> return ret;
> }
>
> @@ -242,8 +266,8 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
> int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
> {
> u32 erase_size;
> - int ret;
> u8 cmd[4];
> + int ret = -1;
>
> erase_size = flash->sector_size;
> if (offset % erase_size || len % erase_size) {
> @@ -251,12 +275,6 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
> return -1;
> }
>
> - ret = spi_claim_bus(flash->spi);
> - if (ret) {
> - debug("SF: Unable to claim SPI bus\n");
> - return ret;
> - }
> -
> if (erase_size == 4096)
> cmd[0] = CMD_ERASE_4K;
> else
> @@ -279,24 +297,16 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
> debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
> cmd[2], cmd[3], offset);
>
> - ret = spi_flash_cmd_write_enable(flash);
> - if (ret)
> - goto out;
> -
> - ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
> - if (ret)
> - goto out;
> -
> - ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
> - if (ret)
> - goto out;
> + ret = spi_flash_write_common(flash, cmd, sizeof(cmd), NULL, 0);
> + if (ret < 0) {
> + debug("SF: erase failed\n");
> + break;
> + }
>
> offset += erase_size;
> len -= erase_size;
> }
>
> - out:
> - spi_release_bus(flash->spi);
> return ret;
> }
>
> @@ -305,22 +315,10 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
> u8 cmd;
> int ret;
>
> - ret = spi_flash_cmd_write_enable(flash);
> - if (ret < 0) {
> - debug("SF: enabling write failed\n");
> - return ret;
> - }
> -
> cmd = CMD_WRITE_STATUS;
> - ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &sr, 1);
> - if (ret) {
> - debug("SF: fail to write status register\n");
> - return ret;
> - }
> -
> - ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
> + ret = spi_flash_write_common(flash, &cmd, 1, &sr, 1);
> if (ret < 0) {
> - debug("SF: write status register timed out\n");
> + debug("SF: fail to write status register\n");
> return ret;
> }
>
> @@ -339,25 +337,13 @@ int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel)
> }
>
> cmd = flash->bank_write_cmd;
> - ret = spi_flash_cmd_write_enable(flash);
> + ret = spi_flash_write_common(flash, &cmd, 1, &bank_sel, 1);
> if (ret < 0) {
> - debug("SF: enabling write failed\n");
> - return ret;
> - }
> -
> - ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &bank_sel, 1);
> - if (ret) {
> - debug("SF: fail to write bank addr register\n");
> + debug("SF: fail to write bank register\n");
> return ret;
> }
> flash->bank_curr = bank_sel;
>
> - ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
> - if (ret < 0) {
> - debug("SF: write bank addr register timed out\n");
> - return ret;
> - }
> -
> return 0;
> }
>
> diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h
> index 8147f27..be3c768 100644
> --- a/drivers/mtd/spi/spi_flash_internal.h
> +++ b/drivers/mtd/spi/spi_flash_internal.h
> @@ -108,6 +108,16 @@ int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0);
> */
> int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
> size_t cmd_len, void *data, size_t data_len);
> +/*
> + * Used for spi_flash write operation
> + * - SPI claim
> + * - spi_flash_cmd_write_enable
> + * - spi_flash_cmd_write
> + * - spi_flash_cmd_wait_ready
> + * - SPI release
> + */
> +int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
> + size_t cmd_len, const void *buf, size_t buf_len);
>
> /*
> * Send the read status command to the device and wait for the wip
>
Applied to u-boot-spi/master
--
Thanks,
Jagan.
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