From f12f96cfaf53d47aa58eb640744542446aac44dd Mon Sep 17 00:00:00 2001 From: Jagan Teki Date: Wed, 13 May 2020 18:16:39 +0530 Subject: [PATCH] sf: Drop spl_flash_get_sw_write_prot The get_sw_write_prot API is used to get the write-protected bits of flash by reading the status register and other wards it's API for reading register bits. 1) This kind of requirement can be achieved using existing flash operations and flash locking API calls instead of making a separate flash API. 2) Technically there is no real hardware user for this API to use in the source tree. 3) Having a flash operations API for simple register read bits also make difficult to extend the flash operations. 4) Instead of touching generic code, it is possible to have this functionality inside spinor operations in the form of flash hooks or fixups for associated flash chips. Considering all these points, this patch drops the get_sw_write_prot and associated code bases. Cc: Simon Glass Cc: Vignesh R Signed-off-by: Jagan Teki --- drivers/mtd/spi/sf-uclass.c | 9 --------- drivers/mtd/spi/sf_internal.h | 4 ---- drivers/mtd/spi/sf_probe.c | 8 -------- drivers/mtd/spi/spi-nor-core.c | 11 ----------- drivers/mtd/spi/spi-nor-tiny.c | 6 ------ include/spi_flash.h | 27 --------------------------- test/dm/sf.c | 10 +--------- 7 files changed, 1 insertion(+), 74 deletions(-) diff --git a/drivers/mtd/spi/sf-uclass.c b/drivers/mtd/spi/sf-uclass.c index de369aa001..9ce2ecb99a 100644 --- a/drivers/mtd/spi/sf-uclass.c +++ b/drivers/mtd/spi/sf-uclass.c @@ -30,15 +30,6 @@ int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len) return log_ret(sf_get_ops(dev)->erase(dev, offset, len)); } -int spl_flash_get_sw_write_prot(struct udevice *dev) -{ - struct dm_spi_flash_ops *ops = sf_get_ops(dev); - - if (!ops->get_sw_write_prot) - return -ENOSYS; - return log_ret(ops->get_sw_write_prot(dev)); -} - /* * TODO(sjg@chromium.org): This is an old-style function. We should remove * it when all SPI flash drivers use dm diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h index 3bcb7a22df..dabd40a4cc 100644 --- a/drivers/mtd/spi/sf_internal.h +++ b/drivers/mtd/spi/sf_internal.h @@ -75,10 +75,6 @@ extern const struct flash_info spi_nor_ids[]; #define JEDEC_MFR(info) ((info)->id[0]) #define JEDEC_ID(info) (((info)->id[1]) << 8 | ((info)->id[2])) -/* Get software write-protect value (BP bits) */ -int spi_flash_cmd_get_sw_write_prot(struct spi_flash *flash); - - #if CONFIG_IS_ENABLED(SPI_FLASH_MTD) int spi_flash_mtd_register(struct spi_flash *flash); void spi_flash_mtd_unregister(void); diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index ee7cbaf3f6..4e9973bb62 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -130,13 +130,6 @@ static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len) return mtd->_erase(mtd, &instr); } -static int spi_flash_std_get_sw_write_prot(struct udevice *dev) -{ - struct spi_flash *flash = dev_get_uclass_priv(dev); - - return spi_flash_cmd_get_sw_write_prot(flash); -} - int spi_flash_std_probe(struct udevice *dev) { struct spi_slave *slave = dev_get_parent_priv(dev); @@ -162,7 +155,6 @@ static const struct dm_spi_flash_ops spi_flash_std_ops = { .read = spi_flash_std_read, .write = spi_flash_std_write, .erase = spi_flash_std_erase, - .get_sw_write_prot = spi_flash_std_get_sw_write_prot, }; static const struct udevice_id spi_flash_std_ids[] = { diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c index 56b44ebbe8..310d477f00 100644 --- a/drivers/mtd/spi/spi-nor-core.c +++ b/drivers/mtd/spi/spi-nor-core.c @@ -2640,14 +2640,3 @@ int spi_nor_scan(struct spi_nor *nor) return 0; } - -/* U-Boot specific functions, need to extend MTD to support these */ -int spi_flash_cmd_get_sw_write_prot(struct spi_nor *nor) -{ - int sr = read_sr(nor); - - if (sr < 0) - return sr; - - return (sr >> 2) & 7; -} diff --git a/drivers/mtd/spi/spi-nor-tiny.c b/drivers/mtd/spi/spi-nor-tiny.c index 55f86d5155..9f676c649d 100644 --- a/drivers/mtd/spi/spi-nor-tiny.c +++ b/drivers/mtd/spi/spi-nor-tiny.c @@ -798,9 +798,3 @@ int spi_nor_scan(struct spi_nor *nor) return 0; } - -/* U-Boot specific functions, need to extend MTD to support these */ -int spi_flash_cmd_get_sw_write_prot(struct spi_nor *nor) -{ - return -ENOTSUPP; -} diff --git a/include/spi_flash.h b/include/spi_flash.h index 0b23f57a71..d9b2af856c 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -34,19 +34,6 @@ struct dm_spi_flash_ops { int (*write)(struct udevice *dev, u32 offset, size_t len, const void *buf); int (*erase)(struct udevice *dev, u32 offset, size_t len); - /** - * get_sw_write_prot() - Check state of software write-protect feature - * - * SPI flash chips can lock a region of the flash defined by a - * 'protected area'. This function checks if this protected area is - * defined. - * - * @dev: SPI flash device - * @return 0 if no region is write-protected, 1 if a region is - * write-protected, -ENOSYS if the driver does not implement this, - * other -ve value on error - */ - int (*get_sw_write_prot)(struct udevice *dev); }; /* Access the serial operations for a device */ @@ -88,20 +75,6 @@ int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len, */ int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len); -/** - * spl_flash_get_sw_write_prot() - Check state of software write-protect feature - * - * SPI flash chips can lock a region of the flash defined by a - * 'protected area'. This function checks if this protected area is - * defined. - * - * @dev: SPI flash device - * @return 0 if no region is write-protected, 1 if a region is - * write-protected, -ENOSYS if the driver does not implement this, - * other -ve value on error - */ -int spl_flash_get_sw_write_prot(struct udevice *dev); - /** * spi_flash_std_probe() - Probe a SPI flash device * diff --git a/test/dm/sf.c b/test/dm/sf.c index 55b8d1545f..9e7dead684 100644 --- a/test/dm/sf.c +++ b/test/dm/sf.c @@ -20,7 +20,7 @@ /* Simple test of sandbox SPI flash */ static int dm_test_spi_flash(struct unit_test_state *uts) { - struct udevice *dev, *emul; + struct udevice *dev; int full_size = 0x200000; int size = 0x10000; u8 *src, *dst; @@ -50,14 +50,6 @@ static int dm_test_spi_flash(struct unit_test_state *uts) ut_assertok(spi_flash_read_dm(dev, 0, size, dst)); ut_asserteq_mem(src, dst, size); - /* Try the write-protect stuff */ - ut_assertok(uclass_first_device_err(UCLASS_SPI_EMUL, &emul)); - ut_asserteq(0, spl_flash_get_sw_write_prot(dev)); - sandbox_sf_set_block_protect(emul, 1); - ut_asserteq(1, spl_flash_get_sw_write_prot(dev)); - sandbox_sf_set_block_protect(emul, 0); - ut_asserteq(0, spl_flash_get_sw_write_prot(dev)); - /* Check mapping */ ut_assertok(dm_spi_get_mmap(dev, &map_base, &map_size, &offset)); ut_asserteq(0x1000, map_base); -- 2.39.5