mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-27 20:38:52 +09:00
![Mike Frysinger](/assets/img/avatar_default.png)
No need for these to be exported as they are only accessed indirectly via function pointers. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
164 lines
4.0 KiB
C
164 lines
4.0 KiB
C
/*
|
|
* (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
|
|
|
|
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_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 = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
|
|
if (ret)
|
|
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;
|
|
}
|
|
|
|
static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
|
|
{
|
|
return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
|
|
}
|
|
|
|
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 = spi_flash_cmd_read_fast;
|
|
eon->flash.sector_size = params->page_size * params->pages_per_sector
|
|
* params->sectors_per_block;
|
|
eon->flash.size = params->page_size * params->pages_per_sector
|
|
* params->nr_sectors;
|
|
|
|
return &eon->flash;
|
|
}
|