Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-25 14:10:43 +00:00
Code Issues Projects Releases Packages Wiki Activity

sf: new driver for Winbond W25X16/32/64 devices

Browse source 
Signed-off-by: Jason McMullan <jason.mcmullan@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Jason McMullan 2009-10-09 17:12:23 -04:00 committed by Wolfgang Denk
parent cada315100
commit d394a77950
4 changed files with 339 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/mtd/spi/Makefile
View file

@ -31,6 +31,7 @@ COBJS-$(CONFIG_SPI_FLASH_MACRONIX) += macronix.o
COBJS-$(CONFIG_SPI_FLASH_SPANSION) += spansion.o
COBJS-$(CONFIG_SPI_FLASH_SST) += sst.o
COBJS-$(CONFIG_SPI_FLASH_STMICRO) += stmicro.o
COBJS-$(CONFIG_SPI_FLASH_WINBOND) += winbond.o
COBJS-$(CONFIG_SPI_M95XXX) += eeprom_m95xxx.o
COBJS := $(COBJS-y)

5
drivers/mtd/spi/spi_flash.c
View file

@ -140,6 +140,11 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
flash = spi_flash_probe_macronix(spi, idcode);
break;
#endif
#ifdef CONFIG_SPI_FLASH_WINBOND
case 0xef:
flash = spi_flash_probe_winbond(spi, idcode);
break;
#endif
#ifdef CONFIG_SPI_FLASH_STMICRO
case 0x20:
flash = spi_flash_probe_stmicro(spi, idcode);

1
drivers/mtd/spi/spi_flash_internal.h
View file

@ -49,3 +49,4 @@ struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode);

332
drivers/mtd/spi/winbond.c Normal file
View file

@ -0,0 +1,332 @@
/*
* Copyright 2008, Network Appliance Inc.
* Author: Jason McMullan <mcmullan <at> netapp.com>
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <malloc.h>
#include <spi_flash.h>
#include "spi_flash_internal.h"
/* M25Pxx-specific commands */
#define CMD_W25_WREN 0x06 /* Write Enable */
#define CMD_W25_WRDI 0x04 /* Write Disable */
#define CMD_W25_RDSR 0x05 /* Read Status Register */
#define CMD_W25_WRSR 0x01 /* Write Status Register */
#define CMD_W25_READ 0x03 /* Read Data Bytes */
#define CMD_W25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_W25_PP 0x02 /* Page Program */
#define CMD_W25_SE 0x20 /* Sector (4K) Erase */
#define CMD_W25_BE 0xd8 /* Block (64K) Erase */
#define CMD_W25_CE 0xc7 /* Chip Erase */
#define CMD_W25_DP 0xb9 /* Deep Power-down */
#define CMD_W25_RES 0xab /* Release from DP, and Read Signature */
#define WINBOND_ID_W25X16 0x3015
#define WINBOND_ID_W25X32 0x3016
#define WINBOND_ID_W25X64 0x3017
#define WINBOND_SR_WIP (1 << 0) /* Write-in-Progress */
struct winbond_spi_flash_params {
uint16_t id;
/* Log2 of page size in power-of-two mode */
uint8_t l2_page_size;
uint16_t pages_per_sector;
uint16_t sectors_per_block;
uint8_t nr_blocks;
const char *name;
};
/* spi_flash needs to be first so upper layers can free() it */
struct winbond_spi_flash {
struct spi_flash flash;
const struct winbond_spi_flash_params *params;
};
static inline struct winbond_spi_flash *
to_winbond_spi_flash(struct spi_flash *flash)
{
return container_of(flash, struct winbond_spi_flash, flash);
}
static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
{
.id = WINBOND_ID_W25X16,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 32,
.name = "W25X16",
},
{
.id = WINBOND_ID_W25X32,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 64,
.name = "W25X32",
},
{
.id = WINBOND_ID_W25X64,
.l2_page_size = 8,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_blocks = 128,
.name = "W25X64",
},
};
static int winbond_wait_ready(struct spi_flash *flash, unsigned long timeout)
{
struct spi_slave *spi = flash->spi;
unsigned long timebase;
int ret;
u8 status;
u8 cmd[4] = { CMD_W25_RDSR, 0xff, 0xff, 0xff };
ret = spi_xfer(spi, 32, &cmd[0], NULL, SPI_XFER_BEGIN);
if (ret) {
debug("SF: Failed to send command %02x: %d\n", cmd, ret);
return ret;
}
timebase = get_timer(0);
do {
ret = spi_xfer(spi, 8, NULL, &status, 0);
if (ret) {
debug("SF: Failed to get status for cmd %02x: %d\n", cmd, ret);
return -1;
}
if ((status & WINBOND_SR_WIP) == 0)
break;
} while (get_timer(timebase) < timeout);
spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
if ((status & WINBOND_SR_WIP) == 0)
return 0;
debug("SF: Timed out on command %02x: %d\n", cmd, ret);
/* Timed out */
return -1;
}
/*
* Assemble the address part of a command for Winbond devices in
* non-power-of-two page size mode.
*/
static void winbond_build_address(struct winbond_spi_flash *stm, u8 *cmd, u32 offset)
{
unsigned long page_addr;
unsigned long byte_addr;
unsigned long page_size;
unsigned int page_shift;
/*
* The "extra" space per page is the power-of-two page size
* divided by 32.
*/
page_shift = stm->params->l2_page_size;
page_size = (1 << page_shift);
page_addr = offset / page_size;
byte_addr = offset % page_size;
cmd[0] = page_addr >> (16 - page_shift);
cmd[1] = page_addr << (page_shift - 8) | (byte_addr >> 8);
cmd[2] = byte_addr;
}
static int winbond_read_fast(struct spi_flash *flash,
u32 offset, size_t len, void *buf)
{
struct winbond_spi_flash *stm = to_winbond_spi_flash(flash);
u8 cmd[5];
cmd[0] = CMD_READ_ARRAY_FAST;
winbond_build_address(stm, cmd + 1, offset);
cmd[4] = 0x00;
return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
}
static int winbond_write(struct spi_flash *flash,
u32 offset, size_t len, const void *buf)
{
struct winbond_spi_flash *stm = to_winbond_spi_flash(flash);
unsigned long page_addr;
unsigned long byte_addr;
unsigned long page_size;
unsigned int page_shift;
size_t chunk_len;
size_t actual;
int ret;
u8 cmd[4];
page_shift = stm->params->l2_page_size;
page_size = (1 << page_shift);
page_addr = offset / page_size;
byte_addr = offset % page_size;
ret = spi_claim_bus(flash->spi);
if (ret) {
debug("SF: Unable to claim SPI bus\n");
return ret;
}
for (actual = 0; actual < len; actual += chunk_len) {
chunk_len = min(len - actual, page_size - byte_addr);
cmd[0] = CMD_W25_PP;
cmd[1] = page_addr >> (16 - page_shift);
cmd[2] = page_addr << (page_shift - 8) | (byte_addr >> 8);
cmd[3] = byte_addr;
debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\n",
buf + actual,
cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
ret = spi_flash_cmd(flash->spi, CMD_W25_WREN, NULL, 0);
if (ret < 0) {
debug("SF: Enabling Write failed\n");
goto out;
}
ret = spi_flash_cmd_write(flash->spi, cmd, 4,
buf + actual, chunk_len);
if (ret < 0) {
debug("SF: Winbond Page Program failed\n");
goto out;
}
ret = winbond_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret < 0) {
debug("SF: Winbond page programming timed out\n");
goto out;
}
page_addr++;
byte_addr = 0;
}
debug("SF: Winbond: Successfully programmed %u bytes @ 0x%x\n",
len, offset);
ret = 0;
out:
spi_release_bus(flash->spi);
return ret;
}
int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
{
struct winbond_spi_flash *stm = to_winbond_spi_flash(flash);
unsigned long sector_size;
unsigned int page_shift;
size_t actual;
int ret;
u8 cmd[4];
/*
* This function currently uses sector erase only.
* probably speed things up by using bulk erase
* when possible.
*/
page_shift = stm->params->l2_page_size;
sector_size = (1 << page_shift) * stm->params->pages_per_sector;
if (offset % sector_size || len % sector_size) {
debug("SF: Erase offset/length not multiple of sector size\n");
return -1;
}
len /= sector_size;
cmd[0] = CMD_W25_SE;
ret = spi_claim_bus(flash->spi);
if (ret) {
debug("SF: Unable to claim SPI bus\n");
return ret;
}
for (actual = 0; actual < len; actual++) {
winbond_build_address(stm, &cmd[1], offset + actual * sector_size);
printf("Erase: %02x %02x %02x %02x\n",
cmd[0], cmd[1], cmd[2], cmd[3]);
ret = spi_flash_cmd(flash->spi, CMD_W25_WREN, NULL, 0);
if (ret < 0) {
debug("SF: Enabling Write failed\n");
goto out;
}
ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
if (ret < 0) {
debug("SF: Winbond sector erase failed\n");
goto out;
}
ret = winbond_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
if (ret < 0) {
debug("SF: Winbond sector erase timed out\n");
goto out;
}
}
debug("SF: Winbond: Successfully erased %u bytes @ 0x%x\n",
len * sector_size, offset);
ret = 0;
out:
spi_release_bus(flash->spi);
return ret;
}
struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
{
const struct winbond_spi_flash_params *params;
unsigned long page_size;
struct winbond_spi_flash *stm;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) {
params = &winbond_spi_flash_table[i];
if (params->id == ((idcode[1] << 8) | idcode[2]))
break;
}
if (i == ARRAY_SIZE(winbond_spi_flash_table)) {
debug("SF: Unsupported Winbond ID %02x%02x\n",
idcode[1], idcode[2]);
return NULL;
}
stm = malloc(sizeof(struct winbond_spi_flash));
if (!stm) {
debug("SF: Failed to allocate memory\n");
return NULL;
}
stm->params = params;
stm->flash.spi = spi;
stm->flash.name = params->name;
/* Assuming power-of-two page size initially. */
page_size = 1 << params->l2_page_size;
stm->flash.write = winbond_write;
stm->flash.erase = winbond_erase;
stm->flash.read = winbond_read_fast;
stm->flash.size = page_size * params->pages_per_sector
* params->sectors_per_block
* params->nr_blocks;
debug("SF: Detected %s with page size %u, total %u bytes\n",
params->name, page_size, stm->flash.size);
return &stm->flash;
}