Whitebox
/
u-boot
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sf: new driver for EON devices

Browse Source 
Signed-off-by: Chong Huang <chuang@ucrobotics.com>
Signed-off-by: Haitao Zhang <minipanda@linuxrobot.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
master
Chong Huang 14 years ago committed by Mike Frysinger
parent 97a85b223a
commit d1d9065647
4 changed files with 280 additions and 0 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 1
      drivers/mtd/spi/Makefile
  2. 275
      drivers/mtd/spi/eon.c
  3. 3
      drivers/mtd/spi/spi_flash.c
  4. 1
      drivers/mtd/spi/spi_flash_internal.h

1
drivers/mtd/spi/Makefile
Unescape View File

@ -27,6 +27,7 @@ LIB := $(obj)libspi_flash.o
COBJS-$(CONFIG_SPI_FLASH) += spi_flash.o
COBJS-$(CONFIG_SPI_FLASH_ATMEL) += atmel.o
COBJS-$(CONFIG_SPI_FLASH_EON) += eon.o
COBJS-$(CONFIG_SPI_FLASH_MACRONIX) += macronix.o
COBJS-$(CONFIG_SPI_FLASH_SPANSION) += spansion.o
COBJS-$(CONFIG_SPI_FLASH_SST) += sst.o

275
drivers/mtd/spi/eon.c
Unescape View File

@ -0,0 +1,275 @@
/*
* (C) Copyright 2010, ucRobotics Inc.
* Author: Chong Huang <chuang@ucrobotics.com>
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <malloc.h>
#include <spi_flash.h>
#include "spi_flash_internal.h"
/* EN25Q128-specific commands */
#define CMD_EN25Q128_WREN 0x06 /* Write Enable */
#define CMD_EN25Q128_WRDI 0x04 /* Write Disable */
#define CMD_EN25Q128_RDSR 0x05 /* Read Status Register */
#define CMD_EN25Q128_WRSR 0x01 /* Write Status Register */
#define CMD_EN25Q128_READ 0x03 /* Read Data Bytes */
#define CMD_EN25Q128_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_EN25Q128_PP 0x02 /* Page Program */
#define CMD_EN25Q128_SE 0x20 /* Sector Erase */
#define CMD_EN25Q128_BE 0xd8 /* Block Erase */
#define CMD_EN25Q128_DP 0xb9 /* Deep Power-down */
#define CMD_EN25Q128_RES 0xab /* Release from DP, and Read Signature */
#define EON_ID_EN25Q128 0x18
#define EON_SR_WIP (1 << 0) /* Write-in-Progress */
struct eon_spi_flash_params {
u8 idcode1;
u16 page_size;
u16 pages_per_sector;
u16 sectors_per_block;
u16 nr_sectors;
const char *name;
};
/* spi_flash needs to be first so upper layers can free() it */
struct eon_spi_flash {
struct spi_flash flash;
const struct eon_spi_flash_params *params;
};
static inline struct eon_spi_flash *to_eon_spi_flash(struct spi_flash *flash)
{
return container_of(flash, struct eon_spi_flash, flash);
}
static const struct eon_spi_flash_params eon_spi_flash_table[] = {
{
.idcode1 = EON_ID_EN25Q128,
.page_size = 256,
.pages_per_sector = 16,
.sectors_per_block = 16,
.nr_sectors = 4096,
.name = "EN25Q128",
},
};
static int eon_wait_ready(struct spi_flash *flash, unsigned long timeout)
{
struct spi_slave *spi = flash->spi;
unsigned long timebase;
int ret;
u8 cmd = CMD_EN25Q128_RDSR;
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 {
ret = spi_xfer(spi, 8, NULL, &status, 0);
if (ret)
return -1;
if ((status & EON_SR_WIP) == 0)
break;
} while (get_timer(timebase) < timeout);
spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
if ((status & EON_SR_WIP) == 0)
return 0;
/* Timed out */
return -1;
}
static int eon_read_fast(struct spi_flash *flash,
u32 offset, size_t len, void *buf)
{
struct eon_spi_flash *eon = to_eon_spi_flash(flash);
unsigned long page_addr;
unsigned long page_size;
u8 cmd[5];
page_size = eon->params->page_size;
page_addr = offset / page_size;
cmd[0] = CMD_READ_ARRAY_FAST;
cmd[1] = page_addr >> 8;
cmd[2] = page_addr;
cmd[3] = offset % page_size;
cmd[4] = 0x00;
return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
}
static int eon_write(struct spi_flash *flash,
u32 offset, size_t len, const void *buf)
{
struct eon_spi_flash *eon = to_eon_spi_flash(flash);
unsigned long page_addr;
unsigned long byte_addr;
unsigned long page_size;
size_t chunk_len;
size_t actual;
int ret;
u8 cmd[4];
page_size = eon->params->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;
}
ret = 0;
for (actual = 0; actual < len; actual += chunk_len) {
chunk_len = min(len - actual, page_size - byte_addr);
cmd[0] = CMD_EN25Q128_PP;
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 = %d\n",
buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
ret = spi_flash_cmd(flash->spi, CMD_EN25Q128_WREN, NULL, 0);
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: EON Page Program failed\n");
break;
}
ret = eon_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret < 0) {
debug("SF: EON page programming timed out\n");
break;
}
page_addr++;
byte_addr = 0;
}
debug("SF: EON: Successfully programmed %u bytes @ 0x%x\n",
len, offset);
spi_release_bus(flash->spi);
return ret;
}
int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
{
/* block erase */
struct eon_spi_flash *eon = to_eon_spi_flash(flash);
unsigned long block_size;
size_t actual;
int ret;
u8 cmd[4];
block_size = eon->params->page_size * eon->params->pages_per_sector
* eon->params->sectors_per_block;
if (offset % block_size || len % block_size) {
debug("SF: Erase offset/length not multiple of block size\n");
return -1;
}
len /= block_size;
cmd[0] = CMD_EN25Q128_BE;
cmd[2] = 0x00;
cmd[3] = 0x00;
ret = spi_claim_bus(flash->spi);
if (ret) {
debug("SF: Unable to claim SPI bus\n");
return ret;
}
ret = 0;
for (actual = 0; actual < len; actual++) {
cmd[1] = (offset / block_size) + actual;
ret = spi_flash_cmd(flash->spi, CMD_EN25Q128_WREN, NULL, 0);
if (ret < 0) {
debug("SF: Enabling Write failed\n");
break;
}
ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
if (ret < 0) {
debug("SF: EON page erase failed\n");
break;
}
ret = eon_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
if (ret < 0) {
debug("SF: EON page erase timed out\n");
break;
}
}
debug("SF: EON: Successfully erased %u bytes @ 0x%x\n",
len * block_size, offset);
spi_release_bus(flash->spi);
return ret;
}
struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
{
const struct eon_spi_flash_params *params;
struct eon_spi_flash *eon;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) {
params = &eon_spi_flash_table[i];
if (params->idcode1 == idcode[2])
break;
}
if (i == ARRAY_SIZE(eon_spi_flash_table)) {
debug("SF: Unsupported EON ID %02x\n", idcode[1]);
return NULL;
}
eon = malloc(sizeof(*eon));
if (!eon) {
debug("SF: Failed to allocate memory\n");
return NULL;
}
eon->params = params;
eon->flash.spi = spi;
eon->flash.name = params->name;
eon->flash.write = eon_write;
eon->flash.erase = eon_erase;
eon->flash.read = eon_read_fast;
eon->flash.size = params->page_size * params->pages_per_sector
* params->nr_sectors;
debug("SF: Detected %s with page size %u, total %u bytes\n",
params->name, params->page_size, eon->flash.size);
return &eon->flash;
}

3
drivers/mtd/spi/spi_flash.c
Unescape View File

@ -131,6 +131,9 @@ static const struct {
#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

1
drivers/mtd/spi/spi_flash_internal.h
Unescape View File

@ -46,6 +46,7 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
/* Manufacturer-specific probe functions */
struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_eon(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);

Write Preview
Loading…
Cancel
Save