mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-30 06:10:56 +00:00
Code Issues Releases Wiki Activity

mtd: spi-nor: move all spansion specifics into spansion.c

Browse source 
The clear status register flags is only available on spansion flashes.
Move all the functions around that into the spanion module.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Tested-by: Pratyush Yadav <p.yadav@ti.com> # on mt35xu512aba, s28hs512t
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Link: https://lore.kernel.org/r/20220223134358.1914798-29-michael@walle.cc
This commit is contained in:
Michael Walle 2022-02-23 14:43:54 +01:00 committed by Tudor Ambarus
parent 6235ff040c
commit 837d5181be
3 changed files with 70 additions and 50 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

49
drivers/mtd/spi-nor/core.c
View file

@ -554,33 +554,6 @@ int spi_nor_write_ear(struct spi_nor *nor, u8 ear)
return ret;
}
/**
* spi_nor_clear_sr() - Clear the Status Register.
* @nor: pointer to 'struct spi_nor'.
*/
static void spi_nor_clear_sr(struct spi_nor *nor)
{
int ret;
if (nor->spimem) {
struct spi_mem_op op =
SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_CLSR, 0),
SPI_MEM_OP_NO_ADDR,
SPI_MEM_OP_NO_DUMMY,
SPI_MEM_OP_NO_DATA);
spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
ret = spi_mem_exec_op(nor->spimem, &op);
} else {
ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_CLSR,
NULL, 0);
}
if (ret)
dev_dbg(nor->dev, "error %d clearing SR\n", ret);
}
/**
* spi_nor_sr_ready() - Query the Status Register to see if the flash is ready
* for new commands.
@ -595,28 +568,6 @@ int spi_nor_sr_ready(struct spi_nor *nor)
if (ret)
return ret;
if (nor->flags & SNOR_F_USE_CLSR &&
nor->bouncebuf[0] & (SR_E_ERR | SR_P_ERR)) {
if (nor->bouncebuf[0] & SR_E_ERR)
dev_err(nor->dev, "Erase Error occurred\n");
else
dev_err(nor->dev, "Programming Error occurred\n");
spi_nor_clear_sr(nor);
/*
* WEL bit remains set to one when an erase or page program
* error occurs. Issue a Write Disable command to protect
* against inadvertent writes that can possibly corrupt the
* contents of the memory.
*/
ret = spi_nor_write_disable(nor);
if (ret)
return ret;
return -EIO;
}
return !(nor->bouncebuf[0] & SR_WIP);
}

70
drivers/mtd/spi-nor/spansion.c
View file

@ -8,6 +8,7 @@
#include "core.h"
#define SPINOR_OP_CLSR 0x30 /* Clear status register 1 */
#define SPINOR_OP_RD_ANY_REG 0x65 /* Read any register */
#define SPINOR_OP_WR_ANY_REG 0x71 /* Write any register */
#define SPINOR_REG_CYPRESS_CFR2V 0x00800003
@ -294,6 +295,72 @@ static const struct flash_info spansion_nor_parts[] = {
},
};
/**
* spi_nor_clear_sr() - Clear the Status Register.
* @nor: pointer to 'struct spi_nor'.
*/
static void spi_nor_clear_sr(struct spi_nor *nor)
{
int ret;
if (nor->spimem) {
struct spi_mem_op op =
SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_CLSR, 0),
SPI_MEM_OP_NO_ADDR,
SPI_MEM_OP_NO_DUMMY,
SPI_MEM_OP_NO_DATA);
spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
ret = spi_mem_exec_op(nor->spimem, &op);
} else {
ret = spi_nor_controller_ops_write_reg(nor, SPINOR_OP_CLSR,
NULL, 0);
}
if (ret)
dev_dbg(nor->dev, "error %d clearing SR\n", ret);
}
/**
* spi_nor_sr_ready_and_clear() - Query the Status Register to see if the flash
* is ready for new commands and clear it if there are any errors.
* @nor: pointer to 'struct spi_nor'.
*
* Return: 1 if ready, 0 if not ready, -errno on errors.
*/
static int spi_nor_sr_ready_and_clear(struct spi_nor *nor)
{
int ret;
ret = spi_nor_read_sr(nor, nor->bouncebuf);
if (ret)
return ret;
if (nor->bouncebuf[0] & (SR_E_ERR | SR_P_ERR)) {
if (nor->bouncebuf[0] & SR_E_ERR)
dev_err(nor->dev, "Erase Error occurred\n");
else
dev_err(nor->dev, "Programming Error occurred\n");
spi_nor_clear_sr(nor);
/*
* WEL bit remains set to one when an erase or page program
* error occurs. Issue a Write Disable command to protect
* against inadvertent writes that can possibly corrupt the
* contents of the memory.
*/
ret = spi_nor_write_disable(nor);
if (ret)
return ret;
return -EIO;
}
return !(nor->bouncebuf[0] & SR_WIP);
}
static void spansion_nor_late_init(struct spi_nor *nor)
{
if (nor->params->size > SZ_16M) {
@ -302,6 +369,9 @@ static void spansion_nor_late_init(struct spi_nor *nor)
nor->erase_opcode = SPINOR_OP_SE;
nor->mtd.erasesize = nor->info->sector_size;
}
if (nor->flags & SNOR_F_USE_CLSR)
nor->params->ready = spi_nor_sr_ready_and_clear;
}
static const struct spi_nor_fixups spansion_nor_fixups = {

1
include/linux/mtd/spi-nor.h
View file

@ -90,7 +90,6 @@
/* Used for Spansion flashes only. */
#define SPINOR_OP_BRWR 0x17 /* Bank register write */
#define SPINOR_OP_CLSR 0x30 /* Clear status register 1 */
/* Used for Micron flashes only. */
#define SPINOR_OP_RD_EVCR 0x65 /* Read EVCR register */