GNUBoot/coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
coreboot-kgpe-d16/src/drivers/spi/stmicro.c
Furquan Shaikh c28984d9ea spi: Clean up SPI flash driver interface 
RW flag was added to spi_slave structure to get around a requirement on
some AMD flash controllers that need to group together all spi volatile
operations (write/erase). This rw flag is not a property or attribute of
the SPI slave or controller. Thus, instead of saving it in spi_slave
structure, clean up the SPI flash driver interface. This allows
chipsets/mainboards (that require volatile operations to be grouped) to
indicate beginning and end of such grouped operations.

New user APIs are added to allow users to perform probe, read, write,
erase, volatile group begin and end operations. Callbacks defined in
spi_flash structure are expected to be used only by the SPI flash
driver. Any chipset that requires grouping of volatile operations can
select the newly added Kconfig option SPI_FLASH_HAS_VOLATILE_GROUP and
define callbacks for chipset_volatile_group_{begin,end}.

spi_claim_bus/spi_release_bus calls have been removed from the SPI flash
chip drivers which end up calling do_spi_flash_cmd since it already has
required calls for claiming and releasing SPI bus before performing a
read/write operation.

BUG=None
BRANCH=None
TEST=Compiles successfully.

Change-Id: Idfc052e82ec15b6c9fa874cee7a61bd06e923fbf
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17462
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-11-22 17:32:09 +01:00

282 lines
6.9 KiB
C
Raw Blame History

/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright 2008, Network Appliance Inc.
* Jason McMullan <mcmullan@netapp.com>
*
* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <stdlib.h>
#include <spi_flash.h>
#include <spi-generic.h>
#include "spi_flash_internal.h"
/* M25Pxx-specific commands */
#define CMD_M25PXX_WREN 0x06 /* Write Enable */
#define CMD_M25PXX_WRDI 0x04 /* Write Disable */
#define CMD_M25PXX_RDSR 0x05 /* Read Status Register */
#define CMD_M25PXX_WRSR 0x01 /* Write Status Register */
#define CMD_M25PXX_READ 0x03 /* Read Data Bytes */
#define CMD_M25PXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_M25PXX_PP 0x02 /* Page Program */
#define CMD_M25PXX_SSE 0x20 /* Subsector Erase */
#define CMD_M25PXX_SE 0xd8 /* Sector Erase */
#define CMD_M25PXX_BE 0xc7 /* Bulk Erase */
#define CMD_M25PXX_DP 0xb9 /* Deep Power-down */
#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
/*
* Device ID = (memory_type << 8) + memory_capacity
*/
#define STM_ID_M25P10 0x2011
#define STM_ID_M25P16 0x2015
#define STM_ID_M25P20 0x2012
#define STM_ID_M25P32 0x2016
#define STM_ID_M25P40 0x2013
#define STM_ID_M25P64 0x2017
#define STM_ID_M25P80 0x2014
#define STM_ID_M25P128 0x2018
#define STM_ID_N25Q256 0xba19
#define STM_ID_N25Q064 0xbb17
#define STM_ID_N25Q128 0xbb18
#define STM_ID_N25Q128A 0xba18
struct stmicro_spi_flash_params {
u16 device_id;
u8 op_erase;
u16 page_size;
u16 pages_per_sector;
u16 nr_sectors;
const char *name;
};
/* spi_flash needs to be first so upper layers can free() it */
struct stmicro_spi_flash {
struct spi_flash flash;
const struct stmicro_spi_flash_params *params;
};
static inline
struct stmicro_spi_flash *to_stmicro_spi_flash(const struct spi_flash *flash)
{
return container_of(flash, struct stmicro_spi_flash, flash);
}
static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
{
.device_id = STM_ID_M25P10,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 128,
.nr_sectors = 4,
.name = "M25P10",
},
{
.device_id = STM_ID_M25P16,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 32,
.name = "M25P16",
},
{
.device_id = STM_ID_M25P20,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 4,
.name = "M25P20",
},
{
.device_id = STM_ID_M25P32,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 64,
.name = "M25P32",
},
{
.device_id = STM_ID_M25P40,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 8,
.name = "M25P40",
},
{
.device_id = STM_ID_M25P64,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 128,
.name = "M25P64",
},
{
.device_id = STM_ID_M25P80,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 256,
.nr_sectors = 16,
.name = "M25P80",
},
{
.device_id = STM_ID_M25P128,
.op_erase = CMD_M25PXX_SE,
.page_size = 256,
.pages_per_sector = 1024,
.nr_sectors = 64,
.name = "M25P128",
},
{
.device_id = STM_ID_N25Q064,
.op_erase = CMD_M25PXX_SSE,
.page_size = 256,
.pages_per_sector = 16,
.nr_sectors = 2048,
.name = "N25Q064",
},
{
.device_id = STM_ID_N25Q128,
.op_erase = CMD_M25PXX_SSE,
.page_size = 256,
.pages_per_sector = 16,
.nr_sectors = 4096,
.name = "N25Q128",
},
{
.device_id = STM_ID_N25Q128A,
.op_erase = CMD_M25PXX_SSE,
.page_size = 256,
.pages_per_sector = 16,
.nr_sectors = 4096,
.name = "N25Q128A",
},
{
.device_id = STM_ID_N25Q256,
.op_erase = CMD_M25PXX_SSE,
.page_size = 256,
.pages_per_sector = 16,
.nr_sectors = 8192,
.name = "N25Q256",
},
};
static int stmicro_write(const struct spi_flash *flash,
u32 offset, size_t len, const void *buf)
{
struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
unsigned long byte_addr;
unsigned long page_size;
size_t chunk_len;
size_t actual;
int ret = 0;
u8 cmd[4];
page_size = stm->params->page_size;
byte_addr = offset % page_size;
for (actual = 0; actual < len; actual += chunk_len) {
chunk_len = min(len - actual, page_size - byte_addr);
chunk_len = spi_crop_chunk(sizeof(cmd), chunk_len);
cmd[0] = CMD_M25PXX_PP;
cmd[1] = (offset >> 16) & 0xff;
cmd[2] = (offset >> 8) & 0xff;
cmd[3] = offset & 0xff;
#if CONFIG_DEBUG_SPI_FLASH
printk(BIOS_SPEW, "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);
#endif
ret = spi_flash_cmd(flash->spi, CMD_M25PXX_WREN, NULL, 0);
if (ret < 0) {
printk(BIOS_WARNING, "SF: Enabling Write failed\n");
goto out;
}
ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd),
buf + actual, chunk_len);
if (ret < 0) {
printk(BIOS_WARNING, "SF: STMicro Page Program failed\n");
goto out;
}
ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret)
goto out;
offset += chunk_len;
byte_addr = 0;
}
#if CONFIG_DEBUG_SPI_FLASH
printk(BIOS_SPEW, "SF: STMicro: Successfully programmed %zu bytes @"
" 0x%lx\n", len, (unsigned long)(offset - len));
#endif
ret = 0;
out:
return ret;
}
static struct stmicro_spi_flash stm;
struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
{
const struct stmicro_spi_flash_params *params;
unsigned int i;
if (idcode[0] == 0xff) {
i = spi_flash_cmd(spi, CMD_M25PXX_RES, idcode, 4);
if (i)
return NULL;
if ((idcode[3] & 0xf0) == 0x10) {
idcode[0] = 0x20;
idcode[1] = 0x20;
idcode[2] = idcode[3] + 1;
} else
return NULL;
}
for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
params = &stmicro_spi_flash_table[i];
if (params->device_id == (idcode[1] << 8 | idcode[2])) {
break;
}
}
if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
printk(BIOS_WARNING, "SF: Unsupported STMicro ID %02x%02x\n",
idcode[1], idcode[2]);
return NULL;
}
stm.params = params;
stm.flash.spi = spi;
stm.flash.name = params->name;
stm.flash.internal_write = stmicro_write;
stm.flash.internal_erase = spi_flash_cmd_erase;
stm.flash.internal_read = spi_flash_cmd_read_fast;
stm.flash.sector_size = params->page_size * params->pages_per_sector;
stm.flash.size = stm.flash.sector_size * params->nr_sectors;
stm.flash.erase_cmd = params->op_erase;
return &stm.flash;
}
Reference in a new issue View git blame Copy permalink