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SPI: Fix Eon support 

The Eon SPI25 code had a number of issues:
 - fix page write calculation
 - fix erase segment
 - fix id check
 - fix sector size
 - make commands EN25 generic
This makes the code similar to other SPI25 devices used in coreboot.

BUG=chrome-os-partner:25907
BRANCH=baytrail(rambi)
TEST=Read and write MRC and ELOG on Glimmer with Eon device.

Original-Change-Id: I7667eab28b850790d92a591c869788d51c26a56c
Original-Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/198323
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Original-Commit-Queue: Marc Jones <marc.jones@se-eng.com>
Original-Tested-by: Marc Jones <marc.jones@se-eng.com>
(cherry picked from commit 2ee0da695bf6a6c6aedc0dd2b3a3b7c9c3165bca)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I8917e778cd62f3745189336d23c0c6118887d893
Reviewed-on: http://review.coreboot.org/7934
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
This commit is contained in:
Marc Jones 2014-05-01 14:53:24 -06:00
parent 8e64388210
commit 79f60a5c9d
1 changed files with 46 additions and 42 deletions
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88
src/drivers/spi/eon.c
View File

@ -1,5 +1,7 @@
/*
* (C) Copyright 2010, ucRobotics Inc.
* Copyright (c) 2014, Sage Electronic Engineering, LLC
* .
* Author: Chong Huang <chuang@ucrobotics.com>
* Licensed under the GPL-2 or later.
*/
@ -9,24 +11,24 @@
#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 */
/* EN25*-specific commands */
#define CMD_EN25_WREN 0x06 /* Write Enable */
#define CMD_EN25_WRDI 0x04 /* Write Disable */
#define CMD_EN25_RDSR 0x05 /* Read Status Register */
#define CMD_EN25_WRSR 0x01 /* Write Status Register */
#define CMD_EN25_READ 0x03 /* Read Data Bytes */
#define CMD_EN25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
#define CMD_EN25_PP 0x02 /* Page Program */
#define CMD_EN25_SE 0x20 /* Sector Erase */
#define CMD_EN25_BE 0xd8 /* Block Erase */
#define CMD_EN25_DP 0xb9 /* Deep Power-down */
#define CMD_EN25_RES 0xab /* Release from DP, and Read Signature */
#define EON_ID_EN25Q64 0x17
#define EON_ID_EN25Q128 0x18
#define EON_ID_EN25Q128 0x3018
#define EON_ID_EN25Q64 0x3017
struct eon_spi_flash_params {
u8 idcode1;
u16 id;
u16 page_size;
u16 pages_per_sector;
u16 sectors_per_block;
@ -47,7 +49,7 @@ static inline struct eon_spi_flash *to_eon_spi_flash(struct spi_flash *flash)
static const struct eon_spi_flash_params eon_spi_flash_table[] = {
{
.idcode1 = EON_ID_EN25Q128,
.id = EON_ID_EN25Q128,
.page_size = 256,
.pages_per_sector = 16,
.sectors_per_block = 16,
@ -55,7 +57,7 @@ static const struct eon_spi_flash_params eon_spi_flash_table[] = {
.name = "EN25Q128",
},
{
.idcode1 = EON_ID_EN25Q64,
.id = EON_ID_EN25Q64,
.page_size = 256,
.pages_per_sector = 16,
.sectors_per_block = 16,
@ -68,7 +70,6 @@ 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;
@ -76,19 +77,25 @@ static int eon_write(struct spi_flash *flash,
int ret = 0;
u8 cmd[4];
page_size = eon->params->page_size;
page_addr = offset / page_size;
page_size = 1 << eon->params->page_size;
byte_addr = offset % page_size;
flash->spi->rw = SPI_WRITE_FLAG;
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_EN25Q128_PP;
cmd[1] = page_addr >> 8;
cmd[2] = page_addr;
cmd[3] = byte_addr;
ret = spi_flash_cmd(flash->spi, CMD_EN25_WREN, NULL, 0);
if (ret < 0) {
printk(BIOS_WARNING, "SF: Enabling Write failed\n");
goto out;
}
cmd[0] = CMD_EN25_PP;
cmd[1] = (offset >> 16) & 0xff;
cmd[2] = (offset >> 8) & 0xff;
cmd[3] = offset & 0xff;
#if CONFIG_DEBUG_SPI_FLASH
printk(BIOS_SPEW,
@ -96,38 +103,35 @@ static int eon_write(struct spi_flash *flash,
buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
#endif
ret = spi_flash_cmd(flash->spi, CMD_EN25Q128_WREN, NULL, 0);
if (ret < 0) {
printk(BIOS_WARNING, "SF: Enabling Write failed\n");
break;
}
ret = spi_flash_cmd_write(flash->spi, cmd, 4,
ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd),
buf + actual, chunk_len);
if (ret < 0) {
printk(BIOS_WARNING, "SF: EON Page Program failed\n");
break;
goto out;
}
ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret)
break;
if (ret) {
printk(BIOS_WARNING, "SF: EON Page Program timeout\n");
goto out;
}
page_addr++;
offset += chunk_len;
byte_addr = 0;
}
#if CONFIG_DEBUG_SPI_FLASH
printk(BIOS_SPEW, "SF: EON: Successfully programmed %zu bytes @ 0x%x\n",
len, offset);
printk(BIOS_SPEW, "SF: EON: Successfully programmed %zu bytes @ %#x\n",
len, (unsigned int)(offset - len));
#endif
out:
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);
return spi_flash_cmd_erase(flash, CMD_EN25_SE, offset, len);
}
struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
@ -138,12 +142,13 @@ struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) {
params = &eon_spi_flash_table[i];
if (params->idcode1 == idcode[2])
if (params->id == ((idcode[1] << 8) | idcode[2]))
break;
}
if (i == ARRAY_SIZE(eon_spi_flash_table)) {
printk(BIOS_WARNING, "SF: Unsupported EON ID %02x\n", idcode[1]);
printk(BIOS_WARNING, "SF: Unsupported EON ID %#02x%02x\n",
idcode[1], idcode[2]);
return NULL;
}
@ -160,8 +165,7 @@ struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
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.sector_size = params->page_size * params->pages_per_sector;
eon->flash.size = params->page_size * params->pages_per_sector
* params->nr_sectors;