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mtd: spi-nor: Move SST bits out of core.c
Create a SPI NOR manufacturer driver for SST chips, and move the SST definitions outside of core.c. Signed-off-by: Boris Brezillon <[email protected]> Signed-off-by: Tudor Ambarus <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| // SPDX-License-Identifier: GPL-2.0 | ||
| /* | ||
| * Copyright (C) 2005, Intec Automation Inc. | ||
| * Copyright (C) 2014, Freescale Semiconductor, Inc. | ||
| */ | ||
|
|
||
| #include <linux/mtd/spi-nor.h> | ||
|
|
||
| #include "core.h" | ||
|
|
||
| static const struct flash_info sst_parts[] = { | ||
| /* SST -- large erase sizes are "overlays", "sectors" are 4K */ | ||
| { "sst25vf040b", INFO(0xbf258d, 0, 64 * 1024, 8, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst25vf080b", INFO(0xbf258e, 0, 64 * 1024, 16, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst25vf016b", INFO(0xbf2541, 0, 64 * 1024, 32, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst25vf032b", INFO(0xbf254a, 0, 64 * 1024, 64, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst25vf064c", INFO(0xbf254b, 0, 64 * 1024, 128, SECT_4K) }, | ||
| { "sst25wf512", INFO(0xbf2501, 0, 64 * 1024, 1, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst25wf010", INFO(0xbf2502, 0, 64 * 1024, 2, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst25wf020", INFO(0xbf2503, 0, 64 * 1024, 4, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst25wf020a", INFO(0x621612, 0, 64 * 1024, 4, SECT_4K) }, | ||
| { "sst25wf040b", INFO(0x621613, 0, 64 * 1024, 8, SECT_4K) }, | ||
| { "sst25wf040", INFO(0xbf2504, 0, 64 * 1024, 8, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst25wf080", INFO(0xbf2505, 0, 64 * 1024, 16, | ||
| SECT_4K | SST_WRITE) }, | ||
| { "sst26wf016b", INFO(0xbf2651, 0, 64 * 1024, 32, | ||
| SECT_4K | SPI_NOR_DUAL_READ | | ||
| SPI_NOR_QUAD_READ) }, | ||
| { "sst26vf016b", INFO(0xbf2641, 0, 64 * 1024, 32, | ||
| SECT_4K | SPI_NOR_DUAL_READ) }, | ||
| { "sst26vf064b", INFO(0xbf2643, 0, 64 * 1024, 128, | ||
| SECT_4K | SPI_NOR_DUAL_READ | | ||
| SPI_NOR_QUAD_READ) }, | ||
| }; | ||
|
|
||
| static int sst_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); | ||
| size_t actual = 0; | ||
| int ret; | ||
|
|
||
| dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len); | ||
|
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| ret = spi_nor_lock_and_prep(nor); | ||
| if (ret) | ||
| return ret; | ||
|
|
||
| ret = spi_nor_write_enable(nor); | ||
| if (ret) | ||
| goto out; | ||
|
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||
| nor->sst_write_second = false; | ||
|
|
||
| /* Start write from odd address. */ | ||
| if (to % 2) { | ||
| nor->program_opcode = SPINOR_OP_BP; | ||
|
|
||
| /* write one byte. */ | ||
| ret = spi_nor_write_data(nor, to, 1, buf); | ||
| if (ret < 0) | ||
| goto out; | ||
| WARN(ret != 1, "While writing 1 byte written %i bytes\n", ret); | ||
| ret = spi_nor_wait_till_ready(nor); | ||
| if (ret) | ||
| goto out; | ||
|
|
||
| to++; | ||
| actual++; | ||
| } | ||
|
|
||
| /* Write out most of the data here. */ | ||
| for (; actual < len - 1; actual += 2) { | ||
| nor->program_opcode = SPINOR_OP_AAI_WP; | ||
|
|
||
| /* write two bytes. */ | ||
| ret = spi_nor_write_data(nor, to, 2, buf + actual); | ||
| if (ret < 0) | ||
| goto out; | ||
| WARN(ret != 2, "While writing 2 bytes written %i bytes\n", ret); | ||
| ret = spi_nor_wait_till_ready(nor); | ||
| if (ret) | ||
| goto out; | ||
| to += 2; | ||
| nor->sst_write_second = true; | ||
| } | ||
| nor->sst_write_second = false; | ||
|
|
||
| ret = spi_nor_write_disable(nor); | ||
| if (ret) | ||
| goto out; | ||
|
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| ret = spi_nor_wait_till_ready(nor); | ||
| if (ret) | ||
| goto out; | ||
|
|
||
| /* Write out trailing byte if it exists. */ | ||
| if (actual != len) { | ||
| ret = spi_nor_write_enable(nor); | ||
| if (ret) | ||
| goto out; | ||
|
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||
| nor->program_opcode = SPINOR_OP_BP; | ||
| ret = spi_nor_write_data(nor, to, 1, buf + actual); | ||
| if (ret < 0) | ||
| goto out; | ||
| WARN(ret != 1, "While writing 1 byte written %i bytes\n", ret); | ||
| ret = spi_nor_wait_till_ready(nor); | ||
| if (ret) | ||
| goto out; | ||
|
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||
| actual += 1; | ||
|
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| ret = spi_nor_write_disable(nor); | ||
| } | ||
| out: | ||
| *retlen += actual; | ||
| spi_nor_unlock_and_unprep(nor); | ||
| return ret; | ||
| } | ||
|
|
||
| static void sst_default_init(struct spi_nor *nor) | ||
| { | ||
| nor->flags |= SNOR_F_HAS_LOCK; | ||
| } | ||
|
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| static void sst_post_sfdp_fixups(struct spi_nor *nor) | ||
| { | ||
| if (nor->info->flags & SST_WRITE) | ||
| nor->mtd._write = sst_write; | ||
| } | ||
|
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| static const struct spi_nor_fixups sst_fixups = { | ||
| .default_init = sst_default_init, | ||
| .post_sfdp = sst_post_sfdp_fixups, | ||
| }; | ||
|
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| const struct spi_nor_manufacturer spi_nor_sst = { | ||
| .name = "sst", | ||
| .parts = sst_parts, | ||
| .nparts = ARRAY_SIZE(sst_parts), | ||
| .fixups = &sst_fixups, | ||
| }; |