upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
342 lines
8.2 KiB
342 lines
8.2 KiB
/*
|
|
* 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_ID_W25Q64 0x4017
|
|
|
|
#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",
|
|
},
|
|
{
|
|
.id = WINBOND_ID_W25Q64,
|
|
.l2_page_size = 8,
|
|
.pages_per_sector = 16,
|
|
.sectors_per_block = 16,
|
|
.nr_blocks = 128,
|
|
.name = "W25Q64",
|
|
},
|
|
};
|
|
|
|
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 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;
|
|
|
|
printf("SF: Detected %s with page size %u, total ",
|
|
params->name, page_size);
|
|
print_size(stm->flash.size, "\n");
|
|
|
|
return &stm->flash;
|
|
}
|
|
|