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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2014 Alexandre Boeglin <alex@boeglin.org>
*
* 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.
*/
#if CONFIG_MSTARDDC_SPI == 1
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <linux/i2c-dev.h>
#include <linux/i2c.h>
#include "flash.h"
#include "programmer.h"
#include "spi.h"
static const struct spi_master spi_master_mstarddc;
static int mstarddc_fd;
static int mstarddc_addr;
static int mstarddc_doreset = 1;
// MSTAR DDC Commands
#define MSTARDDC_SPI_WRITE 0x10
#define MSTARDDC_SPI_READ 0x11
#define MSTARDDC_SPI_END 0x12
#define MSTARDDC_SPI_RESET 0x24
/* Returns 0 upon success, a negative number upon errors. */
static int mstarddc_spi_shutdown(void *data)
{
// Reset, disables ISP mode
if (mstarddc_doreset == 1) {
uint8_t cmd = MSTARDDC_SPI_RESET;
if (write(mstarddc_fd, &cmd, 1) < 0) {
msg_perr("Error sending reset command: errno %d.\n",
errno);
return -1;
}
} else {
msg_pinfo("Info: Reset command was not sent. "
"Either the noreset=1 option was used, "
"or an error occurred.\n");
}
if (close(mstarddc_fd) < 0) {
msg_perr("Error closing device: errno %d.\n", errno);
return -1;
}
return 0;
}
/* Returns 0 upon success, a negative number upon errors. */
int mstarddc_spi_init(void)
{
int ret = 0;
// Get device, address from command-line
char *i2c_device = extract_programmer_param("dev");
if (i2c_device != NULL && strlen(i2c_device) > 0) {
char *i2c_address = strchr(i2c_device, ':');
if (i2c_address != NULL) {
*i2c_address = '\0';
i2c_address++;
}
if (i2c_address == NULL || strlen(i2c_address) == 0) {
msg_perr("Error: no address specified.\n"
"Use flashrom -p mstarddc_spi:dev=/dev/device:address.\n");
ret = -1;
goto out;
}
mstarddc_addr = strtol(i2c_address, NULL, 16); // FIXME: error handling
} else {
msg_perr("Error: no device specified.\n"
"Use flashrom -p mstarddc_spi:dev=/dev/device:address.\n");
ret = -1;
goto out;
}
msg_pinfo("Info: Will try to use device %s and address 0x%02x.\n", i2c_device, mstarddc_addr);
// Get noreset=1 option from command-line
char *noreset = extract_programmer_param("noreset");
if (noreset != NULL && noreset[0] == '1')
mstarddc_doreset = 0;
free(noreset);
msg_pinfo("Info: Will %sreset the device at the end.\n", mstarddc_doreset ? "" : "NOT ");
// Open device
if ((mstarddc_fd = open(i2c_device, O_RDWR)) < 0) {
switch (errno) {
case EACCES:
msg_perr("Error opening %s: Permission denied.\n"
"Please use sudo or run as root.\n",
i2c_device);
break;
case ENOENT:
msg_perr("Error opening %s: No such file.\n"
"Please check you specified the correct device.\n",
i2c_device);
break;
default:
msg_perr("Error opening %s: %s.\n", i2c_device, strerror(errno));
}
ret = -1;
goto out;
}
// Set slave address
if (ioctl(mstarddc_fd, I2C_SLAVE, mstarddc_addr) < 0) {
msg_perr("Error setting slave address 0x%02x: errno %d.\n",
mstarddc_addr, errno);
ret = -1;
goto out;
}
// Enable ISP mode
uint8_t cmd[5] = { 'M', 'S', 'T', 'A', 'R' };
if (write(mstarddc_fd, cmd, 5) < 0) {
int enable_err = errno;
uint8_t end_cmd = MSTARDDC_SPI_END;
// Assume device is already in ISP mode, try to send END command
if (write(mstarddc_fd, &end_cmd, 1) < 0) {
msg_perr("Error enabling ISP mode: errno %d & %d.\n"
"Please check that device (%s) and address (0x%02x) are correct.\n",
enable_err, errno, i2c_device, mstarddc_addr);
ret = -1;
goto out;
}
}
// Register shutdown function
register_shutdown(mstarddc_spi_shutdown, NULL);
// Register programmer
register_spi_master(&spi_master_mstarddc);
out:
free(i2c_device);
return ret;
}
/* Returns 0 upon success, a negative number upon errors. */
static int mstarddc_spi_send_command(struct flashctx *flash,
unsigned int writecnt,
unsigned int readcnt,
const unsigned char *writearr,
unsigned char *readarr)
{
int ret = 0;
uint8_t *cmd = malloc((writecnt + 1) * sizeof(uint8_t));
if (cmd == NULL) {
msg_perr("Error allocating memory: errno %d.\n", errno);
ret = -1;
}
if (!ret && writecnt) {
cmd[0] = MSTARDDC_SPI_WRITE;
memcpy(cmd + 1, writearr, writecnt);
if (write(mstarddc_fd, cmd, writecnt + 1) < 0) {
msg_perr("Error sending write command: errno %d.\n",
errno);
ret = -1;
}
}
if (!ret && readcnt) {
struct i2c_rdwr_ioctl_data i2c_data;
struct i2c_msg msg[2];
cmd[0] = MSTARDDC_SPI_READ;
i2c_data.nmsgs = 2;
i2c_data.msgs = msg;
i2c_data.msgs[0].addr = mstarddc_addr;
i2c_data.msgs[0].len = 1;
i2c_data.msgs[0].flags = 0;
i2c_data.msgs[0].buf = cmd;
i2c_data.msgs[1].addr = mstarddc_addr;
i2c_data.msgs[1].len = readcnt;
i2c_data.msgs[1].flags = I2C_M_RD;
i2c_data.msgs[1].buf = readarr;
if (ioctl(mstarddc_fd, I2C_RDWR, &i2c_data) < 0) {
msg_perr("Error sending read command: errno %d.\n",
errno);
ret = -1;
}
}
if (!ret && (writecnt || readcnt)) {
cmd[0] = MSTARDDC_SPI_END;
if (write(mstarddc_fd, cmd, 1) < 0) {
msg_perr("Error sending end command: errno %d.\n",
errno);
ret = -1;
}
}
/* Do not reset if something went wrong, as it might prevent from
* retrying flashing. */
if (ret != 0)
mstarddc_doreset = 0;
if (cmd)
free(cmd);
return ret;
}
static const struct spi_master spi_master_mstarddc = {
.max_data_read = 256,
.max_data_write = 256,
.command = mstarddc_spi_send_command,
.multicommand = default_spi_send_multicommand,
.read = default_spi_read,
.write_256 = default_spi_write_256,
.write_aai = default_spi_write_aai,
};
#endif
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