222 строки
5.7 KiB
C
222 строки
5.7 KiB
C
// 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"
|
|
|
|
/* SST flash_info mfr_flag. Used to specify SST byte programming. */
|
|
#define SST_WRITE BIT(0)
|
|
|
|
#define SST26VF_CR_BPNV BIT(3)
|
|
|
|
static int sst26vf_nor_lock(struct spi_nor *nor, loff_t ofs, uint64_t len)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int sst26vf_nor_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len)
|
|
{
|
|
int ret;
|
|
|
|
/* We only support unlocking the entire flash array. */
|
|
if (ofs != 0 || len != nor->params->size)
|
|
return -EINVAL;
|
|
|
|
ret = spi_nor_read_cr(nor, nor->bouncebuf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (!(nor->bouncebuf[0] & SST26VF_CR_BPNV)) {
|
|
dev_dbg(nor->dev, "Any block has been permanently locked\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return spi_nor_global_block_unlock(nor);
|
|
}
|
|
|
|
static int sst26vf_nor_is_locked(struct spi_nor *nor, loff_t ofs, uint64_t len)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static const struct spi_nor_locking_ops sst26vf_nor_locking_ops = {
|
|
.lock = sst26vf_nor_lock,
|
|
.unlock = sst26vf_nor_unlock,
|
|
.is_locked = sst26vf_nor_is_locked,
|
|
};
|
|
|
|
static void sst26vf_nor_late_init(struct spi_nor *nor)
|
|
{
|
|
nor->params->locking_ops = &sst26vf_nor_locking_ops;
|
|
}
|
|
|
|
static const struct spi_nor_fixups sst26vf_nor_fixups = {
|
|
.late_init = sst26vf_nor_late_init,
|
|
};
|
|
|
|
static const struct flash_info sst_nor_parts[] = {
|
|
/* SST -- large erase sizes are "overlays", "sectors" are 4K */
|
|
{ "sst25vf040b", INFO(0xbf258d, 0, 64 * 1024, 8)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst25vf080b", INFO(0xbf258e, 0, 64 * 1024, 16)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst25vf016b", INFO(0xbf2541, 0, 64 * 1024, 32)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst25vf032b", INFO(0xbf254a, 0, 64 * 1024, 64)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst25vf064c", INFO(0xbf254b, 0, 64 * 1024, 128)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_4BIT_BP |
|
|
SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K) },
|
|
{ "sst25wf512", INFO(0xbf2501, 0, 64 * 1024, 1)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst25wf010", INFO(0xbf2502, 0, 64 * 1024, 2)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst25wf020", INFO(0xbf2503, 0, 64 * 1024, 4)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst25wf020a", INFO(0x621612, 0, 64 * 1024, 4)
|
|
FLAGS(SPI_NOR_HAS_LOCK)
|
|
NO_SFDP_FLAGS(SECT_4K) },
|
|
{ "sst25wf040b", INFO(0x621613, 0, 64 * 1024, 8)
|
|
FLAGS(SPI_NOR_HAS_LOCK)
|
|
NO_SFDP_FLAGS(SECT_4K) },
|
|
{ "sst25wf040", INFO(0xbf2504, 0, 64 * 1024, 8)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst25wf080", INFO(0xbf2505, 0, 64 * 1024, 16)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K)
|
|
MFR_FLAGS(SST_WRITE) },
|
|
{ "sst26wf016b", INFO(0xbf2651, 0, 64 * 1024, 32)
|
|
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
|
|
SPI_NOR_QUAD_READ) },
|
|
{ "sst26vf016b", INFO(0xbf2641, 0, 64 * 1024, 32)
|
|
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ) },
|
|
{ "sst26vf064b", INFO(0xbf2643, 0, 64 * 1024, 128)
|
|
FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_SWP_IS_VOLATILE)
|
|
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
|
|
.fixups = &sst26vf_nor_fixups },
|
|
};
|
|
|
|
static int sst_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);
|
|
size_t actual = 0;
|
|
int ret;
|
|
|
|
dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len);
|
|
|
|
ret = spi_nor_lock_and_prep(nor);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = spi_nor_write_enable(nor);
|
|
if (ret)
|
|
goto out;
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
actual += 1;
|
|
|
|
ret = spi_nor_write_disable(nor);
|
|
}
|
|
out:
|
|
*retlen += actual;
|
|
spi_nor_unlock_and_unprep(nor);
|
|
return ret;
|
|
}
|
|
|
|
static void sst_nor_late_init(struct spi_nor *nor)
|
|
{
|
|
if (nor->info->mfr_flags & SST_WRITE)
|
|
nor->mtd._write = sst_nor_write;
|
|
}
|
|
|
|
static const struct spi_nor_fixups sst_nor_fixups = {
|
|
.late_init = sst_nor_late_init,
|
|
};
|
|
|
|
const struct spi_nor_manufacturer spi_nor_sst = {
|
|
.name = "sst",
|
|
.parts = sst_nor_parts,
|
|
.nparts = ARRAY_SIZE(sst_nor_parts),
|
|
.fixups = &sst_nor_fixups,
|
|
};
|