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/*
* SPI flash probing
*
* Copyright (C) 2008 Atmel Corporation
* Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
* Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <fdtdec.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
#include "spi_flash_internal.h"
DECLARE_GLOBAL_DATA_PTR;
/*
* struct spi_flash_params - SPI/QSPI flash device params structure
*
* @name: Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO])
* @jedec: Device jedec ID (0x[1byte_manuf_id][2byte_dev_id])
* @ext_jedec: Device ext_jedec ID
* @sector_size: Sector size of this device
* @nr_sectors: No.of sectors on this device
*/
struct spi_flash_params {
const char *name;
u32 jedec;
u16 ext_jedec;
u32 sector_size;
u32 nr_sectors;
};
static const struct spi_flash_params spi_flash_params_table[] = {
#ifdef CONFIG_SPI_FLASH_EON /* EON */
{"EN25Q32B", 0x1c3016, 0x0, 64 * 1024, 64},
{"EN25Q128B", 0x1c3018, 0x0, 64 * 1024, 256},
#endif
#ifdef CONFIG_SPI_FLASH_GIGADEVICE /* GIGADEVICE */
{"GD25Q64B", 0xc84017, 0x0, 64 * 1024, 128},
{"GD25LQ32", 0xc86016, 0x0, 64 * 1024, 64},
#endif
#ifdef CONFIG_SPI_FLASH_STMICRO /* STMICRO */
{"M25P10", 0x202011, 0x0, 32 * 1024, 4},
{"M25P20", 0x202012, 0x0, 64 * 1024, 4},
{"M25P40", 0x202013, 0x0, 64 * 1024, 8},
{"M25P80", 0x202014, 0x0, 64 * 1024, 16},
{"M25P16", 0x202015, 0x0, 64 * 1024, 32},
{"M25P32", 0x202016, 0x0, 64 * 1024, 64},
{"M25P64", 0x202017, 0x0, 64 * 1024, 128},
{"M25P128", 0x202018, 0x0, 256 * 1024, 64},
{"N25Q32", 0x20ba16, 0x0, 64 * 1024, 64},
{"N25Q32A", 0x20bb16, 0x0, 64 * 1024, 64},
{"N25Q64", 0x20ba17, 0x0, 64 * 1024, 128},
{"N25Q64A", 0x20bb17, 0x0, 64 * 1024, 128},
{"N25Q128", 0x20ba18, 0x0, 64 * 1024, 256},
{"N25Q128A", 0x20bb18, 0x0, 64 * 1024, 256},
{"N25Q256", 0x20ba19, 0x0, 64 * 1024, 512},
{"N25Q256A", 0x20bb19, 0x0, 64 * 1024, 512},
{"N25Q512", 0x20ba20, 0x0, 64 * 1024, 1024},
{"N25Q512A", 0x20bb20, 0x0, 64 * 1024, 1024},
{"N25Q1024", 0x20ba21, 0x0, 64 * 1024, 2048},
{"N25Q1024A", 0x20bb21, 0x0, 64 * 1024, 2048},
#endif
/*
* TODO:
* ATMEL
* MACRONIX
* RAMTRON
* SPANSION
* SST
* WINBOND
*/
};
struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode)
{
const struct spi_flash_params *params;
struct spi_flash *flash;
int i;
u16 jedec = idcode[1] << 8 | idcode[2];
/* Get the flash id (jedec = manuf_id + dev_id) */
for (i = 0; i < ARRAY_SIZE(spi_flash_params_table); i++) {
params = &spi_flash_params_table[i];
if ((params->jedec >> 16) == idcode[0]) {
if ((params->jedec & 0xFFFF) == jedec)
break;
}
}
if (i == ARRAY_SIZE(spi_flash_params_table)) {
printf("SF: Unsupported flash ID: manuf %02x, jedec %04x\n",
idcode[0], jedec);
return NULL;
}
flash = malloc(sizeof(*flash));
if (!flash) {
debug("SF: Failed to allocate spi_flash\n");
return NULL;
}
memset(flash, '\0', sizeof(*flash));
flash->spi = spi;
flash->name = params->name;
flash->poll_cmd = CMD_READ_STATUS;
/* Assign spi_flash ops */
flash->write = spi_flash_cmd_write_multi;
flash->erase = spi_flash_cmd_erase;
flash->read = spi_flash_cmd_read_fast;
/* Compute the flash size */
flash->page_size = 256;
flash->sector_size = params->sector_size;
flash->size = flash->sector_size * params->nr_sectors;
return flash;
}
#ifdef CONFIG_SPI_FLASH_BAR
int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
{
u8 cmd;
u8 curr_bank = 0;
/* discover bank cmds */
switch (idcode0) {
case SPI_FLASH_SPANSION_IDCODE0:
flash->bank_read_cmd = CMD_BANKADDR_BRRD;
flash->bank_write_cmd = CMD_BANKADDR_BRWR;
break;
case SPI_FLASH_STMICRO_IDCODE0:
case SPI_FLASH_WINBOND_IDCODE0:
flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
break;
default:
printf("SF: Unsupported bank commands %02x\n", idcode0);
return -1;
}
/* read the bank reg - on which bank the flash is in currently */
cmd = flash->bank_read_cmd;
if (flash->size > SPI_FLASH_16MB_BOUN) {
if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) {
debug("SF: fail to read bank addr register\n");
return -1;
}
flash->bank_curr = curr_bank;
} else {
flash->bank_curr = curr_bank;
}
return 0;
}
#endif
#ifdef CONFIG_OF_CONTROL
int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
{
fdt_addr_t addr;
fdt_size_t size;
int node;
/* If there is no node, do nothing */
node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
if (node < 0)
return 0;
addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
if (addr == FDT_ADDR_T_NONE) {
debug("%s: Cannot decode address\n", __func__);
return 0;
}
if (flash->size != size) {
debug("%s: Memory map must cover entire device\n", __func__);
return -1;
}
flash->memory_map = (void *)addr;
return 0;
}
#endif /* CONFIG_OF_CONTROL */
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;
u8 idcode[5], *idp;
int ret;
/* Setup spi_slave */
spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
if (!spi) {
printf("SF: Failed to set up slave\n");
return NULL;
}
/* Claim spi bus */
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) {
printf("SF: Failed to get idcodes\n");
goto err_read_id;
}
#ifdef DEBUG
printf("SF: Got idcodes\n");
print_buffer(0, idcode, 1, sizeof(idcode), 0);
#endif
/* Validate ID's from flash dev table */
idp = idcode;
flash = spi_flash_validate_ids(spi, idp);
if (!flash)
goto err_read_id;
#ifdef CONFIG_SPI_FLASH_BAR
/* Configure the BAR - discover bank cmds and read current bank */
ret = spi_flash_bank_config(flash, *idp);
if (ret < 0)
goto err_read_id;
#endif
#ifdef CONFIG_OF_CONTROL
if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
debug("SF: FDT decode error\n");
goto err_read_id;
}
#endif
#ifndef CONFIG_SPL_BUILD
printf("SF: Detected %s with page size ", flash->name);
print_size(flash->sector_size, ", total ");
print_size(flash->size, "");
if (flash->memory_map)
printf(", mapped at %p", flash->memory_map);
puts("\n");
#endif
#ifndef CONFIG_SPI_FLASH_BAR
if (flash->size > SPI_FLASH_16MB_BOUN) {
puts("SF: Warning - Only lower 16MiB accessible,");
puts(" Full access #define CONFIG_SPI_FLASH_BAR\n");
}
#endif
/* Release spi bus */
spi_release_bus(spi);
return flash;
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);
}
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