diff options
Diffstat (limited to 'drivers/mtd/spi-nor/spi-nor.c')
| -rw-r--r-- | drivers/mtd/spi-nor/spi-nor.c | 125 |
1 files changed, 87 insertions, 38 deletions
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index a6adb2785..d0fc165d7 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -830,10 +830,26 @@ static const struct flash_info spi_nor_ids[] = { { "mb85rs1mt", INFO(0x047f27, 0, 128 * 1024, 1, SPI_NOR_NO_ERASE) }, /* GigaDevice */ - { "gd25q32", INFO(0xc84016, 0, 64 * 1024, 64, SECT_4K) }, - { "gd25q64", INFO(0xc84017, 0, 64 * 1024, 128, SECT_4K) }, - { "gd25lq64c", INFO(0xc86017, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) }, - { "gd25q128", INFO(0xc84018, 0, 64 * 1024, 256, SECT_4K) }, + { + "gd25q32", INFO(0xc84016, 0, 64 * 1024, 64, + SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | + SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB) + }, + { + "gd25q64", INFO(0xc84017, 0, 64 * 1024, 128, + SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | + SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB) + }, + { + "gd25lq64c", INFO(0xc86017, 0, 64 * 1024, 128, + SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | + SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB) + }, + { + "gd25q128", INFO(0xc84018, 0, 64 * 1024, 256, + SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | + SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB) + }, /* Intel/Numonyx -- xxxs33b */ { "160s33b", INFO(0x898911, 0, 64 * 1024, 32, 0) }, @@ -871,6 +887,7 @@ static const struct flash_info spi_nor_ids[] = { { "n25q512a", INFO(0x20bb20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) }, { "n25q512ax3", INFO(0x20ba20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) }, { "n25q00", INFO(0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) }, + { "n25q00a", INFO(0x20bb21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) }, /* PMC */ { "pm25lv512", INFO(0, 0, 32 * 1024, 2, SECT_4K_PMC) }, @@ -1031,8 +1048,25 @@ static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len, if (ret) return ret; - ret = nor->read(nor, from, len, retlen, buf); + while (len) { + ret = nor->read(nor, from, len, buf); + if (ret == 0) { + /* We shouldn't see 0-length reads */ + ret = -EIO; + goto read_err; + } + if (ret < 0) + goto read_err; + + WARN_ON(ret > len); + *retlen += ret; + buf += ret; + from += ret; + len -= ret; + } + ret = 0; +read_err: spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_READ); return ret; } @@ -1060,10 +1094,14 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len, nor->program_opcode = SPINOR_OP_BP; /* write one byte. */ - nor->write(nor, to, 1, retlen, buf); + ret = nor->write(nor, to, 1, buf); + if (ret < 0) + goto sst_write_err; + WARN(ret != 1, "While writing 1 byte written %i bytes\n", + (int)ret); ret = spi_nor_wait_till_ready(nor); if (ret) - goto time_out; + goto sst_write_err; } to += actual; @@ -1072,10 +1110,14 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len, nor->program_opcode = SPINOR_OP_AAI_WP; /* write two bytes. */ - nor->write(nor, to, 2, retlen, buf + actual); + ret = nor->write(nor, to, 2, buf + actual); + if (ret < 0) + goto sst_write_err; + WARN(ret != 2, "While writing 2 bytes written %i bytes\n", + (int)ret); ret = spi_nor_wait_till_ready(nor); if (ret) - goto time_out; + goto sst_write_err; to += 2; nor->sst_write_second = true; } @@ -1084,21 +1126,26 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len, write_disable(nor); ret = spi_nor_wait_till_ready(nor); if (ret) - goto time_out; + goto sst_write_err; /* Write out trailing byte if it exists. */ if (actual != len) { write_enable(nor); nor->program_opcode = SPINOR_OP_BP; - nor->write(nor, to, 1, retlen, buf + actual); - + ret = nor->write(nor, to, 1, buf + actual); + if (ret < 0) + goto sst_write_err; + WARN(ret != 1, "While writing 1 byte written %i bytes\n", + (int)ret); ret = spi_nor_wait_till_ready(nor); if (ret) - goto time_out; + goto sst_write_err; write_disable(nor); + actual += 1; } -time_out: +sst_write_err: + *retlen += actual; spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE); return ret; } @@ -1112,8 +1159,8 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { struct spi_nor *nor = mtd_to_spi_nor(mtd); - u32 page_offset, page_size, i; - int ret; + size_t page_offset, page_remain, i; + ssize_t ret; dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len); @@ -1121,35 +1168,37 @@ static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len, if (ret) return ret; - write_enable(nor); - - page_offset = to & (nor->page_size - 1); + for (i = 0; i < len; ) { + ssize_t written; - /* do all the bytes fit onto one page? */ - if (page_offset + len <= nor->page_size) { - nor->write(nor, to, len, retlen, buf); - } else { + page_offset = (to + i) & (nor->page_size - 1); + WARN_ONCE(page_offset, + "Writing at offset %zu into a NOR page. Writing partial pages may decrease reliability and increase wear of NOR flash.", + page_offset); /* the size of data remaining on the first page */ - page_size = nor->page_size - page_offset; - nor->write(nor, to, page_size, retlen, buf); - - /* write everything in nor->page_size chunks */ - for (i = page_size; i < len; i += page_size) { - page_size = len - i; - if (page_size > nor->page_size) - page_size = nor->page_size; + page_remain = min_t(size_t, + nor->page_size - page_offset, len - i); - ret = spi_nor_wait_till_ready(nor); - if (ret) - goto write_err; - - write_enable(nor); + write_enable(nor); + ret = nor->write(nor, to + i, page_remain, buf + i); + if (ret < 0) + goto write_err; + written = ret; - nor->write(nor, to + i, page_size, retlen, buf + i); + ret = spi_nor_wait_till_ready(nor); + if (ret) + goto write_err; + *retlen += written; + i += written; + if (written != page_remain) { + dev_err(nor->dev, + "While writing %zu bytes written %zd bytes\n", + page_remain, written); + ret = -EIO; + goto write_err; } } - ret = spi_nor_wait_till_ready(nor); write_err: spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE); return ret; |