static int change_to_bootmode(struct ssp_data *data)
{
int iCnt;
int ret;
char syncb = BL_SPI_SOF;
struct stm32fwu_spi_cmd dummy_cmd;
pr_debug("[SSP]%s\n", __func__);
dummy_cmd.timeout = DEF_ACKCMD_NUMBER;
gpio_set_value_cansleep(data->rst, 0);
mdelay(4);
gpio_set_value_cansleep(data->rst, 1);
usleep_range(45000, 47000);
for (iCnt = 0; iCnt < 9; iCnt++) {
gpio_set_value_cansleep(data->rst, 0);
mdelay(4);
gpio_set_value_cansleep(data->rst, 1);
usleep_range(15000, 15500);
}
ret = stm32fwu_spi_write(data->spi, &syncb, 1);
#if SSP_STM_DEBUG
pr_info("[SSP] stm32fwu_spi_write(sync byte) returned %d\n", ret);
#endif
ret = stm32fwu_spi_wait_for_ack(data->spi, &dummy_cmd, BL_DUMMY);
#if SSP_STM_DEBUG
pr_info("[SSP] stm32fwu_spi_wait_for_ack returned %d (0x%x)\n", ret, ret);
#endif
return ret;
}
static int send_byte_count(struct spi_device *spi, int bytes, int get_ack)
{
int res;
uchar bbuff[3];
struct stm32fwu_spi_cmd dummy_cmd;
pr_debug("[SSP]%s\n", __func__);
if (bytes > 256) {
return -EINVAL;
}
bbuff[0] = bytes - 1;
bbuff[1] = ~bbuff[0];
res = stm32fwu_spi_write(spi, bbuff, 2);
if (res < 2) {
return -EPROTO;
}
if (get_ack) {
dummy_cmd.timeout = DEF_ACKROOF_NUMBER;
res = stm32fwu_spi_wait_for_ack(spi, &dummy_cmd, BL_ACK);
if (res != BL_ACK) {
return -EPROTO;
}
}
return 0;
}
static int fw_erase_stm(struct spi_device *spi)
{
struct stm32fwu_spi_cmd cmd;
struct stm32fwu_spi_cmd dummy_cmd;
int ret;
char buff[EXT_ER_DATA_LEN] = {0xff, 0xff, 0x00};
ssp_dbgf();
cmd.cmd = EXT_ER_COMMAND;
cmd.xor_cmd = XOR_EXT_ER_COMMAND;
cmd.timeout = DEF_ACKCMD_NUMBER;
cmd.ack_pad = BL_DUMMY;
ret = stm32fwu_spi_send_cmd(spi, &cmd);
if (ret != BL_ACK) {
ssp_err("fw_erase failed - %d", ret);
return ret;
}
ret = stm32fwu_spi_write(spi, buff, EXT_ER_DATA_LEN);
if (ret < EXT_ER_DATA_LEN) {
ssp_err("fw_erase write failed");
return 0;
}
dummy_cmd.timeout = DEF_ACK_ERASE_NUMBER;
ret = stm32fwu_spi_wait_for_ack(spi, &dummy_cmd, BL_ACK);
if (ret == BL_ACK)
return 0;
else if (ret == BL_NACK)
return -EPROTO;
else
return -ETIME;
}
static int fw_erase_stm(struct spi_device *spi)
{
struct stm32fwu_spi_cmd cmd;
struct stm32fwu_spi_cmd dummy_cmd;
int ret;
char buff[EXT_ER_DATA_LEN] = {0xff, 0xff, 0x00};
cmd.cmd = EXT_ER_COMMAND;
cmd.xor_cmd = XOR_EXT_ER_COMMAND;
cmd.timeout = DEF_ACKCMD_NUMBER;
cmd.ack_pad = 0xFF;
ret = stm32fwu_spi_send_cmd(spi, &cmd);
if (ret < 0 || ret != BL_ACK) {
pr_err("[SSP] fw_erase failed\n");
return ret;
}
if (cmd.ack_loops == 0)
ret = stm32fwu_spi_write(spi, buff, EXT_ER_DATA_LEN);
else
ret = stm32fwu_spi_write(spi, buff, EXT_ER_DATA_LEN-1);
if (ret < (EXT_ER_DATA_LEN - cmd.ack_loops)) {
return -EPROTO;
}
dummy_cmd.timeout = DEF_ACK_ERASE_NUMBER;
ret = stm32fwu_spi_wait_for_ack(spi, &dummy_cmd, BL_ACK);
if (ret == BL_ACK)
return 0;
else if (ret == BL_NACK)
return -EPROTO;
else
return -ETIME;
}
static int change_to_bootmode(struct ssp_data *data)
{
int iCnt;
int ret;
char syncb = BL_SPI_SOF;
int ncount = 5;
struct stm32fwu_spi_cmd dummy_cmd;
ssp_dbgf();
/* dummy_cmd.timeout = DEF_ACKCMD_NUMBER; */
dummy_cmd.timeout = ncount;
gpio_set_value_cansleep(data->rst, 0);
usleep_range(4000, 4400);
gpio_set_value_cansleep(data->rst, 1);
usleep_range(45000, 47000);
for (iCnt = 0; iCnt < 9; iCnt++) {
gpio_set_value_cansleep(data->rst, 0);
usleep_range(4000, 4400);
gpio_set_value_cansleep(data->rst, 1);
usleep_range(15000, 15500);
}
data->spi->mode = SPI_MODE_0;
if (spi_setup(data->spi))
ssp_err("failed to setup spi mode for boot");
usleep_range(1000, 1100);
msleep(30);
while (ncount-- >= 0) {
ret = stm32fwu_spi_write(data->spi, &syncb, 1);
#if SSP_STM_DEBUG
ssp_info("stm32fwu_spi_write(sync byte) returned %d", ret);
#endif
ret = stm32fwu_spi_wait_for_ack(data->spi, &dummy_cmd, BL_DUMMY);
#if SSP_STM_DEBUG
ssp_info("stm32fwu_spi_wait_for_ack returned %d (0x%x)", ret, ret);
#endif
if (ret == BL_ACK)
break;
}
return ret;
}
static int fw_erase_stm(struct spi_device *spi)
{
struct stm32fwu_spi_cmd cmd;
struct stm32fwu_spi_cmd dummy_cmd;
int ret;
char buff[EXT_ER_DATA_LEN] = {0xff, 0xff, 0x00};
pr_debug("[SSP]%s\n", __func__);
cmd.cmd = EXT_ER_COMMAND;
cmd.xor_cmd = XOR_EXT_ER_COMMAND;
cmd.timeout = DEF_ACKCMD_NUMBER;
cmd.ack_pad = BL_DUMMY;
ret = stm32fwu_spi_send_cmd(spi, &cmd);
if (ret < 0 || ret != BL_ACK) {
pr_err("[SSP] fw_erase failed\n");
return ret;
}
ret = stm32fwu_spi_write(spi, buff, EXT_ER_DATA_LEN);
if( ret < EXT_ER_DATA_LEN )
{
pr_err("[SSP] fw_erase write failed\n");
return 0;
}
dummy_cmd.timeout = DEF_ACK_ERASE_NUMBER;
ret = stm32fwu_spi_wait_for_ack(spi, &dummy_cmd, BL_ACK);
#if SSP_STM_DEBUG
pr_info("[SSP] %s: stm32fwu_spi_wait_for_ack returned %d (0x%x)\n",
__func__, ret, ret);
#endif
if (ret == BL_ACK)
return 0;
else if (ret == BL_NACK)
return -EPROTO;
else
return -ETIME;
}
static int fw_write_stm(struct spi_device *spi, u32 fw_addr,
int len, const u8 *buffer)
{
int res;
struct stm32fwu_spi_cmd cmd;
struct stm32fwu_spi_cmd dummy_cmd;
int i;
u8 xor = 0;
u8 send_buff[STM_MAX_BUFFER_SIZE] = {0,};
cmd.cmd = WMEM_COMMAND;
cmd.xor_cmd = XOR_WMEM_COMMAND;
cmd.timeout = DEF_ACKCMD_NUMBER;
cmd.ack_pad = (u8)((fw_addr >> 24) & 0xFF);
pr_debug("[SSP]%s\n", __func__);
#if SSP_STM_DEBUG
pr_info("[SSP] sending WMEM_COMMAND\n");
#endif
if (len > STM_MAX_XFER_SIZE) {
pr_err("[SSP] Can't send more than 256 bytes per transaction\n");
return -EINVAL;
}
send_buff[0] = len - 1;
memcpy(&send_buff[1], buffer, len);
for (i = 0; i < (len + 1); i++)
xor ^= send_buff[i];
send_buff[len + 1] = xor;
res = stm32fwu_spi_send_cmd(spi, &cmd);
if (res != BL_ACK) {
pr_err("[SSP] Error %d sending read_mem cmd\n", res);
return res;
}
res = send_addr(spi, fw_addr, 0);
if (res != 0) {
pr_err("[SSP] Error %d sending write_mem Address\n", res);
return res;
}
res = stm32fwu_spi_write(spi, send_buff, len + 2);
if (res < len) {
pr_err("[SSP] Error writing to flash. res = %d\n", res);
return ((res > 0) ? -EIO : res);
}
pr_debug("[SSP]%s 2\n", __func__);
dummy_cmd.timeout = DEF_ACKROOF_NUMBER;
usleep_range(100, 150); /* Samsung added */
res = stm32fwu_spi_wait_for_ack(spi, &dummy_cmd, BL_ACK);
if (res == BL_ACK) {
return len;
}
if (res == BL_NACK) {
pr_err("[SSP] Got NAK waiting for WRITE_MEM to complete\n");
return -EPROTO;
}
pr_err("[SSP] timeout waiting for ACK for WRITE_MEM command\n");
return -ETIME;
}
static int stm32fwu_spi_write(struct spi_device *spi,
const u8 *buffer, ssize_t len)
{
int ret;
u8 rx_buf[STM_MAX_BUFFER_SIZE] = {0,};
struct spi_message m;
#if BYTETOBYTE_USED
struct spi_transfer t[STM_MAX_BUFFER_SIZE];
memset(t, 0, STM_MAX_BUFFER_SIZE * sizeof(struct spi_transfer));
int i;
#else
struct spi_transfer t = {
.tx_buf = buffer,
.rx_buf = rx_buf,
.len = len,
.bits_per_word = 8,
};
#endif
spi_message_init(&m);
#if BYTETOBYTE_USED
for (i = 0; i < len; i++) {
t[i].tx_buf = &buffer[i];
t[i].rx_buf = &rx_buf[i];
t[i].len = 1;
t[i].bits_per_word = 8;
t[i].delay_usecs = BYTE_DELAY_WRITE;
spi_message_add_tail(&t[i], &m);
}
#else
spi_message_add_tail(&t, &m);
#endif
ret = spi_sync(spi, &m);
if (ret < 0) {
pr_err("[SSP] Error in %d spi_write()\n", ret);
return ret;
}
return len;
}
static int send_addr(struct spi_device *spi, u32 fw_addr, int send_short)
{
int res;
int i = send_short;
int len = SEND_ADDR_LEN - send_short;
u8 header[SEND_ADDR_LEN];
struct stm32fwu_spi_cmd dummy_cmd;
dummy_cmd.timeout = DEF_ACKROOF_NUMBER;
pr_debug("[SSP]%s\n", __func__);
header[0] = (u8)((fw_addr >> 24) & 0xFF);
header[1] = (u8)((fw_addr >> 16) & 0xFF);
header[2] = (u8)((fw_addr >> 8) & 0xFF);
header[3] = (u8)(fw_addr & 0xFF);
header[4] = header[0] ^ header[1] ^ header[2] ^ header[3];
res = stm32fwu_spi_write(spi, &header[i], len);
if (res < len) {
pr_err("[SSP] Error in sending address. Res %d\n", res);
return ((res > 0) ? -EIO : res);
}
res = stm32fwu_spi_wait_for_ack(spi, &dummy_cmd, BL_ACK);
if (res != BL_ACK) {
pr_err("[SSP] send_addr(): rcv_ack returned 0x%x\n",
res);
return res;
}
return 0;
}
static void stm32fwu_spi_send_ack( struct spi_device *spi, u8 SyncData )
{
u8 syncb[2] = {0};
syncb[0] = SyncData;
stm32fwu_spi_write(spi, syncb, 1);
}
static int stm32fwu_spi_wait_for_ack(struct spi_device *spi,
struct stm32fwu_spi_cmd *cmd, u8 dummy_bytes)
{
static int check_spi_wait_cnt = 1;
struct spi_message m;
char tx_buf = 0x0;
char rx_buf = 0x0;
struct spi_transfer t = {
.tx_buf = &tx_buf,
.rx_buf = &rx_buf,
.len = 1,
.bits_per_word = 8,
};
int i = 0;
int ret;
dummy_bytes = BL_DUMMY;
#if SSP_STM_DEBUG
ssp_infof("dummy byte = 0x%02hhx", dummy_bytes);
#endif
while (i < cmd->timeout) {
tx_buf = dummy_bytes;
spi_message_init(&m);
spi_message_add_tail(&t, &m);
ret = spi_sync(spi, &m);
if (ret < 0) {
dev_err(&spi->dev, "%s: spi error %d\n", __func__, ret);
return ret;
} else if ((rx_buf == BL_ACK) || (rx_buf == BL_NACK)) {
/* ACK cmd set */
stm32fwu_spi_send_ack(spi, BL_ACK);
return (int)rx_buf;
} else {
/* Cross cmd set */
tx_buf = rx_buf;
}
if (check_spi_wait_cnt % 20 == 0)
usleep_range(1000, 1100);
else
usleep_range(1000, 1100);
i++;
check_spi_wait_cnt++;
}
#if SSP_STM_DEBUG
dev_err(&spi->dev, "%s: Timeout after %d loops\n",
__func__, cmd->timeout);
#endif
return -EIO;
}
static int stm32fwu_spi_send_cmd(struct spi_device *spi,
struct stm32fwu_spi_cmd *cmd)
{
u8 tx_buf[3] = {0,};
u8 rx_buf[3] = {0,};
u8 dummy_byte = 0;
struct spi_message m;
int ret;
#if BYTETOBYTE_USED
int i;
struct spi_transfer t[STM_MAX_BUFFER_SIZE];
memset(t, 0, STM_MAX_BUFFER_SIZE * sizeof(struct spi_transfer));
#else
struct spi_transfer t = {
.tx_buf = tx_buf,
.rx_buf = rx_buf,
.len = 3,
.bits_per_word = 8,
};
#endif
ssp_dbgf();
spi_message_init(&m);
tx_buf[0] = BL_SPI_SOF;
tx_buf[1] = cmd->cmd;
tx_buf[2] = cmd->xor_cmd;
#if BYTETOBYTE_USED
for (i = 0; i < 3; i++) {
t[i].tx_buf = &tx_buf[i];
t[i].rx_buf = &rx_buf[i];
t[i].len = 1;
t[i].bits_per_word = 8;
t[i].delay_usecs = BYTE_DELAY_WRITE;
spi_message_add_tail(&t[i], &m);
}
#else
spi_message_add_tail(&t, &m);
#endif
ret = spi_sync(spi, &m);
if (ret < 0) {
dev_err(&spi->dev, "%s: spi error %d\n", __func__, ret);
return ret;
}
dummy_byte = cmd->ack_pad;
/* check for ack/nack and loop until found */
ret = stm32fwu_spi_wait_for_ack(spi, cmd, dummy_byte);
cmd->status = ret;
if (ret != BL_ACK) {
ssp_errf("Got NAK or Error %d", ret);
return ret;
}
return ret;
}
static int stm32fwu_spi_write(struct spi_device *spi,
const u8 *buffer, ssize_t len)
{
int ret;
u8 rx_buf[STM_MAX_BUFFER_SIZE] = {0,};
struct spi_message m;
#if BYTETOBYTE_USED
struct spi_transfer t[STM_MAX_BUFFER_SIZE];
memset(t, 0, STM_MAX_BUFFER_SIZE * sizeof(struct spi_transfer));
int i;
#else
struct spi_transfer t = {
.tx_buf = buffer,
.rx_buf = rx_buf,
.len = (unsigned int)len,
.bits_per_word = 8,
};
#endif
spi_message_init(&m);
#if BYTETOBYTE_USED
for (i = 0; i < len; i++) {
t[i].tx_buf = &buffer[i];
t[i].rx_buf = &rx_buf[i];
t[i].len = 1;
t[i].bits_per_word = 8;
t[i].delay_usecs = BYTE_DELAY_WRITE;
spi_message_add_tail(&t[i], &m);
}
#else
spi_message_add_tail(&t, &m);
#endif
ret = spi_sync(spi, &m);
if (ret < 0) {
ssp_err("Error in %d spi_write()", ret);
return ret;
}
return len;
}
static int send_addr(struct spi_device *spi, u32 fw_addr, int send_short)
{
int res;
int i = send_short;
int len = SEND_ADDR_LEN - send_short;
u8 header[SEND_ADDR_LEN];
struct stm32fwu_spi_cmd dummy_cmd;
dummy_cmd.timeout = DEF_ACKROOF_NUMBER;
ssp_dbgf();
header[0] = (u8)((fw_addr >> 24) & 0xFF);
header[1] = (u8)((fw_addr >> 16) & 0xFF);
header[2] = (u8)((fw_addr >> 8) & 0xFF);
header[3] = (u8)(fw_addr & 0xFF);
header[4] = header[0] ^ header[1] ^ header[2] ^ header[3];
res = stm32fwu_spi_write(spi, &header[i], len);
if (res < len) {
ssp_err("Error in sending address. Res %d", res);
return (res > 0) ? -EIO : res;
}
res = stm32fwu_spi_wait_for_ack(spi, &dummy_cmd, BL_ACK);
if (res != BL_ACK) {
ssp_err("send_addr(): rcv_ack returned 0x%x", res);
return res;
}
return 0;
}
