mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
41e1713425
The only two drivers to write the status register do it in the same way, so unify the implementations. This also makes the block unlock logic the same. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
408 lines
9.3 KiB
C
408 lines
9.3 KiB
C
/*
|
|
* SPI flash interface
|
|
*
|
|
* Copyright (C) 2008 Atmel Corporation
|
|
* Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <malloc.h>
|
|
#include <spi.h>
|
|
#include <spi_flash.h>
|
|
#include <watchdog.h>
|
|
|
|
#include "spi_flash_internal.h"
|
|
|
|
static void spi_flash_addr(u32 addr, u8 *cmd)
|
|
{
|
|
/* cmd[0] is actual command */
|
|
cmd[1] = addr >> 16;
|
|
cmd[2] = addr >> 8;
|
|
cmd[3] = addr >> 0;
|
|
}
|
|
|
|
static int spi_flash_read_write(struct spi_slave *spi,
|
|
const u8 *cmd, size_t cmd_len,
|
|
const u8 *data_out, u8 *data_in,
|
|
size_t data_len)
|
|
{
|
|
unsigned long flags = SPI_XFER_BEGIN;
|
|
int ret;
|
|
|
|
if (data_len == 0)
|
|
flags |= SPI_XFER_END;
|
|
|
|
ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
|
|
if (ret) {
|
|
debug("SF: Failed to send command (%zu bytes): %d\n",
|
|
cmd_len, ret);
|
|
} else if (data_len != 0) {
|
|
ret = spi_xfer(spi, data_len * 8, data_out, data_in, SPI_XFER_END);
|
|
if (ret)
|
|
debug("SF: Failed to transfer %zu bytes of data: %d\n",
|
|
data_len, ret);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
|
|
{
|
|
return spi_flash_cmd_read(spi, &cmd, 1, response, len);
|
|
}
|
|
|
|
int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
|
|
size_t cmd_len, void *data, size_t data_len)
|
|
{
|
|
return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
|
|
}
|
|
|
|
int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
|
|
const void *data, size_t data_len)
|
|
{
|
|
return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
|
|
}
|
|
|
|
int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
|
|
size_t len, const void *buf)
|
|
{
|
|
unsigned long page_addr, byte_addr, page_size;
|
|
size_t chunk_len, actual;
|
|
int ret;
|
|
u8 cmd[4];
|
|
|
|
page_size = flash->page_size;
|
|
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;
|
|
}
|
|
|
|
cmd[0] = CMD_PAGE_PROGRAM;
|
|
for (actual = 0; actual < len; actual += chunk_len) {
|
|
chunk_len = min(len - actual, page_size - byte_addr);
|
|
|
|
cmd[1] = page_addr >> 8;
|
|
cmd[2] = page_addr;
|
|
cmd[3] = byte_addr;
|
|
|
|
debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
|
|
buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
|
|
|
|
ret = spi_flash_cmd_write_enable(flash);
|
|
if (ret < 0) {
|
|
debug("SF: enabling write failed\n");
|
|
break;
|
|
}
|
|
|
|
ret = spi_flash_cmd_write(flash->spi, cmd, 4,
|
|
buf + actual, chunk_len);
|
|
if (ret < 0) {
|
|
debug("SF: write failed\n");
|
|
break;
|
|
}
|
|
|
|
ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
|
|
if (ret)
|
|
break;
|
|
|
|
page_addr++;
|
|
byte_addr = 0;
|
|
}
|
|
|
|
debug("SF: program %s %zu bytes @ %#x\n",
|
|
ret ? "failure" : "success", len, offset);
|
|
|
|
spi_release_bus(flash->spi);
|
|
return ret;
|
|
}
|
|
|
|
int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
|
|
size_t cmd_len, void *data, size_t data_len)
|
|
{
|
|
struct spi_slave *spi = flash->spi;
|
|
int ret;
|
|
|
|
spi_claim_bus(spi);
|
|
ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len);
|
|
spi_release_bus(spi);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
|
|
size_t len, void *data)
|
|
{
|
|
u8 cmd[5];
|
|
|
|
cmd[0] = CMD_READ_ARRAY_FAST;
|
|
spi_flash_addr(offset, cmd);
|
|
cmd[4] = 0x00;
|
|
|
|
return spi_flash_read_common(flash, cmd, sizeof(cmd), data, len);
|
|
}
|
|
|
|
int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
|
|
u8 cmd, u8 poll_bit)
|
|
{
|
|
struct spi_slave *spi = flash->spi;
|
|
unsigned long timebase;
|
|
int ret;
|
|
u8 status;
|
|
|
|
ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
|
|
if (ret) {
|
|
debug("SF: Failed to send command %02x: %d\n", cmd, ret);
|
|
return ret;
|
|
}
|
|
|
|
timebase = get_timer(0);
|
|
do {
|
|
WATCHDOG_RESET();
|
|
|
|
ret = spi_xfer(spi, 8, NULL, &status, 0);
|
|
if (ret)
|
|
return -1;
|
|
|
|
if ((status & poll_bit) == 0)
|
|
break;
|
|
|
|
} while (get_timer(timebase) < timeout);
|
|
|
|
spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
|
|
|
|
if ((status & poll_bit) == 0)
|
|
return 0;
|
|
|
|
/* Timed out */
|
|
debug("SF: time out!\n");
|
|
return -1;
|
|
}
|
|
|
|
int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
|
|
{
|
|
return spi_flash_cmd_poll_bit(flash, timeout,
|
|
CMD_READ_STATUS, STATUS_WIP);
|
|
}
|
|
|
|
int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
|
|
{
|
|
u32 start, end, erase_size;
|
|
int ret;
|
|
u8 cmd[4];
|
|
|
|
erase_size = flash->sector_size;
|
|
if (offset % erase_size || len % erase_size) {
|
|
debug("SF: Erase offset/length not multiple of erase size\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = spi_claim_bus(flash->spi);
|
|
if (ret) {
|
|
debug("SF: Unable to claim SPI bus\n");
|
|
return ret;
|
|
}
|
|
|
|
if (erase_size == 4096)
|
|
cmd[0] = CMD_ERASE_4K;
|
|
else
|
|
cmd[0] = CMD_ERASE_64K;
|
|
start = offset;
|
|
end = start + len;
|
|
|
|
while (offset < end) {
|
|
spi_flash_addr(offset, cmd);
|
|
offset += erase_size;
|
|
|
|
debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
|
|
cmd[2], cmd[3], offset);
|
|
|
|
ret = spi_flash_cmd_write_enable(flash);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
debug("SF: Successfully erased %zu bytes @ %#x\n", len, start);
|
|
|
|
out:
|
|
spi_release_bus(flash->spi);
|
|
return ret;
|
|
}
|
|
|
|
int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
|
|
{
|
|
u8 cmd;
|
|
int ret;
|
|
|
|
ret = spi_flash_cmd_write_enable(flash);
|
|
if (ret < 0) {
|
|
debug("SF: enabling write failed\n");
|
|
return ret;
|
|
}
|
|
|
|
cmd = CMD_WRITE_STATUS;
|
|
ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &sr, 1);
|
|
if (ret) {
|
|
debug("SF: fail to write status register\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
|
|
if (ret < 0) {
|
|
debug("SF: write status register timed out\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The following table holds all device probe functions
|
|
*
|
|
* shift: number of continuation bytes before the ID
|
|
* idcode: the expected IDCODE or 0xff for non JEDEC devices
|
|
* probe: the function to call
|
|
*
|
|
* Non JEDEC devices should be ordered in the table such that
|
|
* the probe functions with best detection algorithms come first.
|
|
*
|
|
* Several matching entries are permitted, they will be tried
|
|
* in sequence until a probe function returns non NULL.
|
|
*
|
|
* IDCODE_CONT_LEN may be redefined if a device needs to declare a
|
|
* larger "shift" value. IDCODE_PART_LEN generally shouldn't be
|
|
* changed. This is the max number of bytes probe functions may
|
|
* examine when looking up part-specific identification info.
|
|
*
|
|
* Probe functions will be given the idcode buffer starting at their
|
|
* manu id byte (the "idcode" in the table below). In other words,
|
|
* all of the continuation bytes will be skipped (the "shift" below).
|
|
*/
|
|
#define IDCODE_CONT_LEN 0
|
|
#define IDCODE_PART_LEN 5
|
|
static const struct {
|
|
const u8 shift;
|
|
const u8 idcode;
|
|
struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode);
|
|
} flashes[] = {
|
|
/* Keep it sorted by define name */
|
|
#ifdef CONFIG_SPI_FLASH_ATMEL
|
|
{ 0, 0x1f, spi_flash_probe_atmel, },
|
|
#endif
|
|
#ifdef CONFIG_SPI_FLASH_EON
|
|
{ 0, 0x1c, spi_flash_probe_eon, },
|
|
#endif
|
|
#ifdef CONFIG_SPI_FLASH_MACRONIX
|
|
{ 0, 0xc2, spi_flash_probe_macronix, },
|
|
#endif
|
|
#ifdef CONFIG_SPI_FLASH_SPANSION
|
|
{ 0, 0x01, spi_flash_probe_spansion, },
|
|
#endif
|
|
#ifdef CONFIG_SPI_FLASH_SST
|
|
{ 0, 0xbf, spi_flash_probe_sst, },
|
|
#endif
|
|
#ifdef CONFIG_SPI_FLASH_STMICRO
|
|
{ 0, 0x20, spi_flash_probe_stmicro, },
|
|
#endif
|
|
#ifdef CONFIG_SPI_FLASH_WINBOND
|
|
{ 0, 0xef, spi_flash_probe_winbond, },
|
|
#endif
|
|
#ifdef CONFIG_SPI_FRAM_RAMTRON
|
|
{ 6, 0xc2, spi_fram_probe_ramtron, },
|
|
# undef IDCODE_CONT_LEN
|
|
# define IDCODE_CONT_LEN 6
|
|
#endif
|
|
/* Keep it sorted by best detection */
|
|
#ifdef CONFIG_SPI_FLASH_STMICRO
|
|
{ 0, 0xff, spi_flash_probe_stmicro, },
|
|
#endif
|
|
#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
|
|
{ 0, 0xff, spi_fram_probe_ramtron, },
|
|
#endif
|
|
};
|
|
#define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
|
|
|
|
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int spi_mode)
|
|
{
|
|
struct spi_slave *spi;
|
|
struct spi_flash *flash = NULL;
|
|
int ret, i, shift;
|
|
u8 idcode[IDCODE_LEN], *idp;
|
|
|
|
spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
|
|
if (!spi) {
|
|
printf("SF: Failed to set up slave\n");
|
|
return NULL;
|
|
}
|
|
|
|
ret = spi_claim_bus(spi);
|
|
if (ret) {
|
|
debug("SF: Failed to claim SPI bus: %d\n", ret);
|
|
goto err_claim_bus;
|
|
}
|
|
|
|
/* Read the ID codes */
|
|
ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
|
|
if (ret)
|
|
goto err_read_id;
|
|
|
|
#ifdef DEBUG
|
|
printf("SF: Got idcodes\n");
|
|
print_buffer(0, idcode, 1, sizeof(idcode), 0);
|
|
#endif
|
|
|
|
/* count the number of continuation bytes */
|
|
for (shift = 0, idp = idcode;
|
|
shift < IDCODE_CONT_LEN && *idp == 0x7f;
|
|
++shift, ++idp)
|
|
continue;
|
|
|
|
/* search the table for matches in shift and id */
|
|
for (i = 0; i < ARRAY_SIZE(flashes); ++i)
|
|
if (flashes[i].shift == shift && flashes[i].idcode == *idp) {
|
|
/* we have a match, call probe */
|
|
flash = flashes[i].probe(spi, idp);
|
|
if (flash)
|
|
break;
|
|
}
|
|
|
|
if (!flash) {
|
|
printf("SF: Unsupported manufacturer %02x\n", *idp);
|
|
goto err_manufacturer_probe;
|
|
}
|
|
|
|
printf("SF: Detected %s with page size ", flash->name);
|
|
print_size(flash->sector_size, ", total ");
|
|
print_size(flash->size, "\n");
|
|
|
|
spi_release_bus(spi);
|
|
|
|
return flash;
|
|
|
|
err_manufacturer_probe:
|
|
err_read_id:
|
|
spi_release_bus(spi);
|
|
err_claim_bus:
|
|
spi_free_slave(spi);
|
|
return NULL;
|
|
}
|
|
|
|
void spi_flash_free(struct spi_flash *flash)
|
|
{
|
|
spi_free_slave(flash->spi);
|
|
free(flash);
|
|
}
|