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drivers/spi: add drivers for sdcard mounted on the spi bus 

Currently supports initialization, read, write, and erase operations.
Tested on HiFive Uneashed

implementation follows SD association's SPI access protocol, found
as doc http://t.cn/AiB8quFZ

Change-Id: I464d2334b8227e448c1c7e324c0455023cffb72a
Signed-off-by: Xiang Wang <merle@hardenedlinux.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35118
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Xiang Wang 2019-08-27 15:57:23 +08:00 committed by Patrick Georgi
parent b23f392766
commit b134945ec1
4 changed files with 881 additions and 0 deletions
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7
src/drivers/spi/Kconfig
View File

@ -28,6 +28,13 @@ config SPI_FLASH
Select this option if your chipset driver needs to store certain
data in the SPI flash.
config SPI_SDCARD
bool
default n
help
Select this option if your chipset driver needs to store certain
data in the SPI sdcard.
if SPI_FLASH
# Keep at 0 because lots of boards assume this default.

1
src/drivers/spi/Makefile.inc
View File

@ -15,6 +15,7 @@ $(1)-y += spi-generic.c
$(1)-y += bitbang.c
$(1)-$(CONFIG_COMMON_CBFS_SPI_WRAPPER) += cbfs_spi.c
$(1)-$(CONFIG_SPI_FLASH) += spi_flash.c
$(1)-$(CONFIG_SPI_SDCARD) += spi_sdcard.c
$(1)-$(CONFIG_BOOT_DEVICE_SPI_FLASH_RW_NOMMAP$(2)) += boot_device_rw_nommap.c
$(1)-$(CONFIG_CONSOLE_SPI_FLASH) += flashconsole.c
$(1)-$(CONFIG_SPI_FLASH_ADESTO) += adesto.c

813
src/drivers/spi/spi_sdcard.c Normal file
View File

@ -0,0 +1,813 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2019 HardenedLinux
*
* 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; version 2 of the License.
*
* 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 <stdint.h>
#include <string.h>
#include <spi-generic.h>
#include <spi_sdcard.h>
#include <crc_byte.h>
#include <commonlib/helpers.h>
#include <console/console.h>
//#define SPI_SDCARD_DEBUG
#ifdef SPI_SDCARD_DEBUG
#define dprintk(fmt, args...) \
printk(BIOS_DEBUG, fmt, ##args)
#else
#define dprintk(fmt, args...) \
do {} while (0)
#endif
#define SDCARD_TYPE_SDSC 1
#define SDCARD_TYPE_SDHC 2
#define SDCARD_TYPE_SDXC 3
/* CMD */
#define GO_IDLE_STATE 0
#define SEND_OP_COND 1
#define SWITCH_FUNC 6
#define SEND_IF_COND 8
#define SEND_CSD 9
#define SEND_CID 10
#define STOP_TRANSMISSION 12
#define SEND_STATUS 13
#define SET_BLOCKLEN 16
#define READ_SINGLE_BLOCK 17
#define READ_MULTIPLEBLOCK 18
#define WRITE_BLOCK 24
#define WRITE_MULTIPLEBLOCK 25
#define PROGRAM_CSD 27
#define SET_WRITE_PROT 28
#define CLR_WRITE_PROT 29
#define SEND_WRITE_PROT 30
#define ERASE_WR_BLK_START_ADDR 32
#define ERASE_WR_BLK_END_ADDR 33
#define ERASE 38
#define LOCK_UNLOCK 42
#define APP_CMD 55
#define GEN_CMD 56
#define READ_OCR 58
#define CRC_ON_OFF 59
/* ACMD */
#define SD_STATUS 13
#define SEND_NUM_WR_BLOCKS 22
#define SET_WR_BLK_ERASE_COUNT 23
#define SD_SEND_OP_COND 41
#define SET_CLR_CARD_DETECT 42
#define SEND_SCR 51
/* control tokens */
#define CT_BLOCK_START 0xfe
#define CT_MULTIPLE_BLOCK_START 0xfc
#define CT_MULTIPLE_BLOCK_STOP 0xfd
#define CT_RESPONSE_MASK 0x1f
#define CT_RESPONSE_ACCEPTED 0x05
#define CT_RESPONSE_REJECTED_CRC 0x0b
#define CT_RESPONSE_REJECTED_WRITE_ERR 0x0d
/* response type */
#define RSP_R1 0
#define RSP_R1b 1
#define RSP_R2 2
#define RSP_R3 3
#define RSP_R4 4
#define RSP_R5 5
#define RSP_R7 7
#define RSP_ERR_CARD_IS_LOCKED (1 << 0)
#define RSP_ERR_WP_ERASE_SKIP (1 << 1)
#define RSP_ERR_GENERAL (1 << 2)
#define RSP_ERR_CC (1 << 3)
#define RSP_ERR_ECC (1 << 4)
#define RSP_ERR_WP_VIOLATION (1 << 5)
#define RSP_ERR_ERASE_PARAM (1 << 6)
#define RSP_ERR_OUT_OF_RANGE (1 << 7)
#define RSP_ERR_IN_IDLE (1 << 8)
#define RSP_ERR_ERASE_RESET (1 << 9)
#define RSP_ERR_ILLEGAL_COMMAND (1 << 10)
#define RSP_ERR_COM_CRC (1 << 11)
#define RSP_ERR_ERASE_SEQUENCE (1 << 12)
#define RSP_ERR_ADDRESS (1 << 13)
#define RSP_ERR_PARAMETER (1 << 14)
#define BLOCK_SIZE 512
static unsigned long long extract_bits(uint8_t *buff,
int width, int start, int end)
{
unsigned long long r = 0;
for (int i = end; i >= start; i--) {
int bitpos = width - i - 1;
int b = bitpos / 8;
int shift = 7 - bitpos % 8;
r = (r << 1) | ((buff[b] >> shift) & 1);
}
return r;
}
static void spi_sdcard_enable_cs(const struct spi_sdcard *card)
{
spi_claim_bus(&card->slave);
}
static void spi_sdcard_disable_cs(const struct spi_sdcard *card)
{
spi_release_bus(&card->slave);
}
static void spi_sdcard_sendbyte(const struct spi_sdcard *card, uint8_t b)
{
dprintk("sdcard -> %#x\n", b);
spi_xfer(&card->slave, &b, 1, NULL, 0);
}
static uint8_t spi_sdcard_recvbyte(const struct spi_sdcard *card)
{
uint8_t b, t = 0xff;
spi_xfer(&card->slave, &t, 1, &b, 1);
dprintk("sdcard <- %#x\n", b);
return b;
}
static uint8_t spi_sdcard_calculate_command_crc(uint8_t cmd, uint32_t argument)
{
uint8_t crc = 0;
crc = crc7_byte(crc, (cmd | 0x40) & 0x7f);
crc = crc7_byte(crc, (argument >> (3 * 8)) & 0xff);
crc = crc7_byte(crc, (argument >> (2 * 8)) & 0xff);
crc = crc7_byte(crc, (argument >> (1 * 8)) & 0xff);
crc = crc7_byte(crc, (argument >> (0 * 8)) & 0xff);
return crc | 1;
}
static int lookup_cmd_response_type(uint8_t cmd)
{
switch (cmd) {
case GO_IDLE_STATE:
case SEND_OP_COND:
case SWITCH_FUNC:
case SEND_CSD:
case SEND_CID:
case SET_BLOCKLEN:
case READ_SINGLE_BLOCK:
case READ_MULTIPLEBLOCK:
case WRITE_BLOCK:
case WRITE_MULTIPLEBLOCK:
case PROGRAM_CSD:
case SEND_WRITE_PROT:
case ERASE_WR_BLK_START_ADDR:
case ERASE_WR_BLK_END_ADDR:
case LOCK_UNLOCK:
case APP_CMD:
case GEN_CMD:
case CRC_ON_OFF:
return RSP_R1;
case STOP_TRANSMISSION:
case SET_WRITE_PROT:
case CLR_WRITE_PROT:
case ERASE:
return RSP_R1b;
case SEND_STATUS:
return RSP_R2;
case READ_OCR:
return RSP_R3;
case SEND_IF_COND:
return RSP_R7;
}
return -1;
}
static int lookup_acmd_response_type(uint8_t cmd)
{
switch (cmd) {
case SEND_NUM_WR_BLOCKS:
case SET_WR_BLK_ERASE_COUNT:
case SD_SEND_OP_COND:
case SET_CLR_CARD_DETECT:
case SEND_SCR:
return RSP_R1;
case SD_STATUS:
return RSP_R2;
}
return -1;
}
static int lookup_response_length(int response_type)
{
switch (response_type) {
case RSP_R1:
case RSP_R1b:
return 1;
case RSP_R2:
return 2;
case RSP_R3:
case RSP_R7:
return 5;
}
return -1;
}
static int response_resolve(int response_type, uint8_t *response,
uint32_t *out_register)
{
__unused static const char * const sd_err[] = {
"Card is locked",
"wp erase skip | lock/unlok cmd failed",
"error",
"CC error",
"card err failed",
"wp violation",
"erase param",
"out of range | csd overwrite",
"in idle state",
"erase reset",
"illegal command",
"com crc error",
"erase sequence error",
"address error",
"parameter error"
};
uint8_t r1 = 0, r2 = 0;
if ((response_type == RSP_R1)
|| (response_type == RSP_R1b)
|| (response_type == RSP_R2)
|| (response_type == RSP_R3)
|| (response_type == RSP_R7))
r1 = response[0];
if (response_type == RSP_R2)
r2 = response[1];
if (((response_type == RSP_R3) || (response_type == RSP_R7))
&& (out_register != NULL)) {
*out_register = 0;
*out_register = (*out_register << 8) | response[1];
*out_register = (*out_register << 8) | response[2];
*out_register = (*out_register << 8) | response[3];
*out_register = (*out_register << 8) | response[4];
}
if (r1 != 0 || r2 != 0) {
int i = 0;
uint16_t r = (r1 << 8) | r2;
while (r) {
if (r & 1)
dprintk("SDCARD ERROR: %s\n", sd_err[i]);
r = r >> 1;
i++;
}
return (r1 << 8) | r2;
}
return 0;
}
static int spi_sdcard_do_command_help(const struct spi_sdcard *card,
int is_acmd,
uint8_t cmd,
uint32_t argument,
uint32_t *out_register)
{
int ret, type, length, wait;
uint8_t crc, c, response[5];
/* calculate crc for command */
crc = spi_sdcard_calculate_command_crc(cmd, argument);
if (is_acmd)
dprintk("\nsdcard execute acmd%d, argument = %#x, crc = %#x\n",
cmd, argument, crc);
else
dprintk("\nsdcard execute cmd%d, argument = %#x, crc = %#x\n",
cmd, argument, crc);
/* lookup response type of command */
if (!is_acmd)
type = lookup_cmd_response_type(cmd);
else
type = lookup_acmd_response_type(cmd);
/* lookup response length of command */
length = lookup_response_length(type);
/* enable cs */
spi_sdcard_enable_cs(card);
/* just delay 8 clocks */
spi_sdcard_recvbyte(card);
/* send command */
spi_sdcard_sendbyte(card, (cmd | 0x40) & 0x7f);
/* send argument */
spi_sdcard_sendbyte(card, (argument >> (8 * 3)) & 0xff);
spi_sdcard_sendbyte(card, (argument >> (8 * 2)) & 0xff);
spi_sdcard_sendbyte(card, (argument >> (8 * 1)) & 0xff);
spi_sdcard_sendbyte(card, (argument >> (8 * 0)) & 0xff);
/* send crc */
spi_sdcard_sendbyte(card, crc);
/* waitting for response */
wait = 0xffff;
while (((c = spi_sdcard_recvbyte(card)) & 0x80) && --wait)
;
if (!wait) {
spi_sdcard_disable_cs(card);
return -1; /* timeout */
}
/* obtain response */
for (int i = 0; i < length; i++) {
response[i] = c;
c = spi_sdcard_recvbyte(card);
}
if (type == RSP_R1b) {
/* waitting done */
wait = 0xffffff;
while (c == 0 && --wait)
c = spi_sdcard_recvbyte(card);
if (!wait) {
spi_sdcard_disable_cs(card);
return -1; /* timeout */
}
}
spi_sdcard_disable_cs(card);
ret = response_resolve(type, response, out_register);
return ret;
}
static int spi_sdcard_do_command(const struct spi_sdcard *card,
uint8_t cmd,
uint32_t argument,
uint32_t *out_register)
{
return spi_sdcard_do_command_help(card, 0, cmd, argument, out_register);
}
static int spi_sdcard_do_app_command(const struct spi_sdcard *card,
uint8_t cmd,
uint32_t argument,
uint32_t *out_register)
{
/* CMD55 */
spi_sdcard_do_command(card, APP_CMD, 0, NULL);
return spi_sdcard_do_command_help(card, 1, cmd, argument, out_register);
}
size_t spi_sdcard_size(const struct spi_sdcard *card)
{
int wait;
uint8_t csd[16];
uint16_t c = 0;
/* CMD9, send csd (128bits register) */
if (spi_sdcard_do_command(card, SEND_CSD, 0, NULL))
return -1;
/* enable CS */
spi_sdcard_enable_cs(card);
/* waitting start block token */
wait = 0xffff;
while ((spi_sdcard_recvbyte(card) != CT_BLOCK_START) && --wait)
;
if (!wait) {
spi_sdcard_disable_cs(card);
return -1;
}
/* receive data */
for (int i = 0; i < 16; i++) {
csd[i] = spi_sdcard_recvbyte(card);
c = crc16_byte(c, csd[i]);
}
/* receive crc and verify check sum */
if (((c >> 8) & 0xff) != spi_sdcard_recvbyte(card)) {
spi_sdcard_disable_cs(card);
return -1;
}
if (((c >> 0) & 0xff) != spi_sdcard_recvbyte(card)) {
spi_sdcard_disable_cs(card);
return -1;
}
/* disable cs */
spi_sdcard_disable_cs(card);
if (extract_bits(csd, 128, 126, 127) == 0) {
/* csd version 1.0 */
size_t c_size = extract_bits(csd, 128, 62, 73);
size_t mult = extract_bits(csd, 128, 47, 49);
size_t read_bl_len = extract_bits(csd, 128, 80, 83);
return (c_size + 1) * mult * (1 << read_bl_len);
}
if (extract_bits(csd, 128, 126, 127) == 1) {
/* csd version 2.0 */
size_t c_size = extract_bits(csd, 128, 48, 69);
return (c_size + 1) * 512 * 1024;
}
return -1;
}
int spi_sdcard_init(struct spi_sdcard *card,
const unsigned int bus, const unsigned int cs)
{
int resolve, wait;
uint32_t ocr;
/* initialize spi controller */
spi_setup_slave(bus, cs, &card->slave);
/* must wait at least 74 clock ticks after reset
* disable cs pin to enter spi mode */
spi_sdcard_disable_cs(card);
for (int i = 0; i < 10; i++)
spi_sdcard_sendbyte(card, 0xff);
/* CMD0, reset sdcard */
wait = 0xffff;
while ((spi_sdcard_do_command(card, GO_IDLE_STATE, 0, NULL)
!= RSP_ERR_IN_IDLE) && --wait)
;
if (!wait)
return -1; /* timeout */
/* CMD8 */
resolve = spi_sdcard_do_command(card, SEND_IF_COND, 0x1aa, NULL);
if (resolve & RSP_ERR_ILLEGAL_COMMAND) {
/* ACMD41, initialize card */
wait = 0xffff;
while ((resolve = spi_sdcard_do_app_command(card,
SD_SEND_OP_COND, 0, NULL)) && --wait)
;
if ((resolve & RSP_ERR_ILLEGAL_COMMAND) || !wait) {
wait = 0xffff;
/* CMD1, initialize card for 2.1mm SD Memory Card */
while (spi_sdcard_do_app_command(card, SEND_OP_COND,
0, NULL) && --wait)
;
if (!wait)
return -1; /* unknown card */
}
} else {
/* ACMD41, initialize card */
wait = 0xffff;
while (spi_sdcard_do_app_command(card, SD_SEND_OP_COND,
0x40000000, NULL) && --wait)
;
if (!wait)
return -1;
}
/* CMD58, read ocr register */
if (spi_sdcard_do_command(card, READ_OCR, 0, &ocr))
return -1;
/* CMD16, set block length to 512 bytes */
if (spi_sdcard_do_command(card, SET_BLOCKLEN, 512, NULL))
return -1;
/* CCS is bit30 of ocr register
* CCS = 0 -> SDSC
* CCS = 1 -> SDHC/SDXC
* */
if ((ocr & 0x40000000) == 0)
card->type = SDCARD_TYPE_SDSC;
else {
/* size > 32G -> SDXC */
if (spi_sdcard_size(card) > 32LL * 1024 * 1024 * 1024)
card->type = SDCARD_TYPE_SDXC;
else
card->type = SDCARD_TYPE_SDHC;
}
return 0;
}
int spi_sdcard_single_read(const struct spi_sdcard *card,
size_t block_address,
void *buff)
{
int wait;
uint16_t c = 0;
if (card->type == SDCARD_TYPE_SDSC)
block_address = block_address * 512;
/* CMD17, start single block read */
if (spi_sdcard_do_command(card, READ_SINGLE_BLOCK, block_address, NULL))
return -1;
/* enable cs */
spi_sdcard_enable_cs(card);
/* waitting start block token */
wait = 0xffff;
while ((spi_sdcard_recvbyte(card) != CT_BLOCK_START) && --wait)
;
if (!wait) { /* timeout */
spi_sdcard_disable_cs(card);
return -1;
}
/* receive data */
for (int i = 0; i < 512; i++) {
((uint8_t *)buff)[i] = spi_sdcard_recvbyte(card);
c = crc16_byte(c, ((uint8_t *)buff)[i]);
}
/* receive crc and verify check sum */
if (((c >> 8) & 0xff) != spi_sdcard_recvbyte(card)) {
spi_sdcard_disable_cs(card);
return -1;
}
if (((c >> 0) & 0xff) != spi_sdcard_recvbyte(card)) {
spi_sdcard_disable_cs(card);
return -1;
}
/* disable cs */
spi_sdcard_disable_cs(card);
return 0;
}
int spi_sdcard_multiple_read(const struct spi_sdcard *card,
size_t start_block_address,
size_t end_block_address,
void *buff)
{
int wait;
int block_num = end_block_address - start_block_address + 1;
if (card->type == SDCARD_TYPE_SDSC) {
start_block_address = start_block_address * 512;
end_block_address = end_block_address * 512;
}
/* CMD18, start multiple block read */
if (spi_sdcard_do_command(card,
READ_MULTIPLEBLOCK, start_block_address, NULL))
return -1;
/* enable cs */
spi_sdcard_enable_cs(card);
for (int i = 0; i < block_num; i++) {
uint16_t c = 0;
/* waitting start block token */
wait = 0xffff;
while ((spi_sdcard_recvbyte(card) != CT_BLOCK_START) && --wait)
;
if (!wait) { /* timeout */
spi_sdcard_disable_cs(card);
return -1;
}
/* receive data */
for (int k = 0; k < 512; k++) {
uint8_t tmp = spi_sdcard_recvbyte(card);
((uint8_t *)buff)[512 * i + k] = tmp;
c = crc16_byte(c, tmp);
}
/* receive crc and verify check sum */
if (((c >> 8) & 0xff) != spi_sdcard_recvbyte(card)) {
spi_sdcard_disable_cs(card);
return -1;
}
if (((c >> 0) & 0xff) != spi_sdcard_recvbyte(card)) {
spi_sdcard_disable_cs(card);
return -1;
}
}
/* disable cs */
spi_sdcard_disable_cs(card);
if (spi_sdcard_do_command(card, STOP_TRANSMISSION, 0, NULL))
if (spi_sdcard_do_command(card, SEND_STATUS, 0, NULL))
return -1;
return 0;
}
int spi_sdcard_read(const struct spi_sdcard *card,
void *dest,
size_t offset,
size_t count)
{
size_t start_block_address = offset / BLOCK_SIZE;
size_t end_block_address = (offset + count - 1) / BLOCK_SIZE;
size_t has_begin = !!(offset % BLOCK_SIZE);
size_t has_end = !!((offset + count) % BLOCK_SIZE);
if (start_block_address == end_block_address) {
uint8_t tmp[BLOCK_SIZE];
size_t o = offset % BLOCK_SIZE;
size_t l = count;
if (spi_sdcard_single_read(card, start_block_address, tmp))
return -1;
memcpy(dest, tmp + o, l);
return 0;
}
if (has_begin) {
uint8_t tmp[BLOCK_SIZE];
size_t o = offset % BLOCK_SIZE;
size_t l = BLOCK_SIZE - o;
if (spi_sdcard_single_read(card, start_block_address, tmp))
return -1;
memcpy(dest, tmp + o, l);
}
if (start_block_address + has_begin <= end_block_address - has_end) {
size_t start_lba = start_block_address + has_begin;
size_t end_lba = end_block_address - has_end;
size_t o = has_begin ? BLOCK_SIZE - offset % BLOCK_SIZE : 0;
if (start_lba < end_lba) {
if (spi_sdcard_multiple_read(card, start_lba, end_lba,
dest + o))
return -1;
} else {
if (spi_sdcard_single_read(card, start_lba, dest + o))
return -1;
}
}
if (has_end) {
uint8_t tmp[BLOCK_SIZE];
size_t o = 0;
size_t l = (offset + count) % BLOCK_SIZE;
if (spi_sdcard_single_read(card, end_block_address, tmp))
return -1;
memcpy(dest + count - l, tmp + o, l);
}
return 0;
}
int spi_sdcard_single_write(const struct spi_sdcard *card,
size_t block_address,
void *buff)
{
int wait;
uint16_t c = 0;
if (card->type == SDCARD_TYPE_SDSC)
block_address = block_address * 512;
if (spi_sdcard_do_command(card, WRITE_BLOCK, block_address, NULL))
return -1;
/* eanbele cs */
spi_sdcard_enable_cs(card);
/* send start block token */
spi_sdcard_sendbyte(card, CT_BLOCK_START);
/* send data */
for (int i = 0; i < 512; i++) {
spi_sdcard_sendbyte(card, ((uint8_t *)buff)[i]);
c = crc16_byte(c, ((uint8_t *)buff)[i]);
}
/* send crc check sum */
spi_sdcard_sendbyte(card, 0xff & (c >> 8));
spi_sdcard_sendbyte(card, 0xff & (c >> 0));
/* recevie and verify data response token */
c = spi_sdcard_recvbyte(card);
if ((c & CT_RESPONSE_MASK) != CT_RESPONSE_ACCEPTED) {
spi_sdcard_disable_cs(card);
return -1;
}
wait = 0xffff;
while ((spi_sdcard_recvbyte(card) == 0) && --wait)
;/* wait for complete */
if (!wait) {
spi_sdcard_disable_cs(card);
return -1;
}
/* disable cs */
spi_sdcard_disable_cs(card);
return 0;
}
int spi_sdcard_multiple_write(const struct spi_sdcard *card,
size_t start_block_address,
size_t end_block_address,
void *buff)
{
int wait, ret = 0;
int block_num = end_block_address - start_block_address + 1;
if (card->type == SDCARD_TYPE_SDSC) {
start_block_address = start_block_address * 512;
end_block_address = end_block_address * 512;
}
if (spi_sdcard_do_command(card, WRITE_MULTIPLEBLOCK,
start_block_address, NULL))
return -1;
/* enable cs */
spi_sdcard_enable_cs(card);
for (int i = 0; i < block_num; i++) {
uint16_t c = 0;
ret = -1;
/* send start block token */
spi_sdcard_sendbyte(card, CT_MULTIPLE_BLOCK_START);
/* send data */
for (int k = 0; k < 512; k++) {
uint8_t tmp = ((uint8_t *)buff)[512 * i + k];
spi_sdcard_sendbyte(card, tmp);
c = crc16_byte(c, tmp);
}
/* send crc check sum */
spi_sdcard_sendbyte(card, 0xff & (c >> 8));
spi_sdcard_sendbyte(card, 0xff & (c >> 0));
/* recevie and verify data response token */
c = spi_sdcard_recvbyte(card);
if ((c & CT_RESPONSE_MASK) != CT_RESPONSE_ACCEPTED)
break;
wait = 0xffff;
while ((spi_sdcard_recvbyte(card) == 0) && --wait)
;/* wait for complete */
if (!wait)
break;
ret = 0;
}
/* send stop transmission token */
spi_sdcard_sendbyte(card, CT_MULTIPLE_BLOCK_STOP);
/* disable cs */
spi_sdcard_disable_cs(card);
if (spi_sdcard_do_command(card, STOP_TRANSMISSION, 0, NULL))
if (spi_sdcard_do_command(card, SEND_STATUS, 0, NULL))
return -1;
return ret;
}
int spi_sdcard_erase(const struct spi_sdcard *card,
size_t start_block_address,
size_t end_block_address)
{
if (card->type == SDCARD_TYPE_SDSC) {
start_block_address = start_block_address * 512;
end_block_address = end_block_address * 512;
}
/* CMD32, set erase start address */
if (spi_sdcard_do_command(card, ERASE_WR_BLK_START_ADDR,
start_block_address, NULL))
return -1;
/* CMD33, set erase end address */
if (spi_sdcard_do_command(card, ERASE_WR_BLK_END_ADDR,
end_block_address, NULL))
return -1;
/* CMD38, erase */
if (spi_sdcard_do_command(card, ERASE, 0, NULL))
return -1;
return 0;
}
int spi_sdcard_erase_all(const struct spi_sdcard *card)
{
return spi_sdcard_erase(card, 0, spi_sdcard_size(card) / BLOCK_SIZE);
}

60
src/include/spi_sdcard.h Normal file
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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2019 HardenedLinux
*
* 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; version 2 of the License.
*
* 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.
*/
#ifndef _SPI_SDCARD_H_
#define _SPI_SDCARD_H_
struct spi_sdcard {
int type;
struct spi_slave slave;
};
int spi_sdcard_init(struct spi_sdcard *card,
const unsigned int bus,
const unsigned int cs);
int spi_sdcard_single_read(const struct spi_sdcard *card,
size_t block_address,
void *buff);
int spi_sdcard_multiple_read(const struct spi_sdcard *card,
size_t start_block_address,
size_t end_block_address,
void *buff);
int spi_sdcard_single_write(const struct spi_sdcard *card,
size_t block_address,
void *buff);
int spi_sdcard_read(const struct spi_sdcard *card,
void *dest,
size_t offset,
size_t count);
int spi_sdcard_multiple_write(const struct spi_sdcard *card,
size_t start_block_address,
size_t end_block_address,
void *buff);
int spi_sdcard_erase(const struct spi_sdcard *card,
size_t start_block_address,
size_t end_block_address);
int spi_sdcard_erase_all(const struct spi_sdcard *card);
/* get the sdcard size in bytes */
size_t spi_sdcard_size(const struct spi_sdcard *card);
#endif /* _SPI_SDCARD_H_ */