int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit)
{
int response;
dbg("%s - %d", __FUNCTION__, reset_bit);
response = ezusb_writememory (serial, CPUCS_REG, &reset_bit, 1, 0xa0);
if (response < 0) {
err("%s- %d failed", __FUNCTION__, reset_bit);
}
return response;
}
int ezusb_set_reset(struct usb_serial *serial, unsigned char reset_bit)
{
int response;
response = ezusb_writememory(serial, CPUCS_REG, &reset_bit, 1, 0xa0);
if (response < 0)
dev_err(&serial->dev->dev, "%s- %d failed\n",
__func__, reset_bit);
return response;
}
/* steps to download the firmware to the WhiteHEAT device:
- hold the reset (by writing to the reset bit of the CPUCS register)
- download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
- release the reset (by writing to the CPUCS register)
- download the WH.HEX file for all addresses greater than 0x1b3f using
VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
- hold the reset
- download the WH.HEX file for all addresses less than 0x1b40 using
VENDOR_REQUEST_ANCHOR_LOAD
- release the reset
- device renumerated itself and comes up as new device id with all
firmware download completed.
*/
static int whiteheat_firmware_download(struct usb_serial *serial,
const struct usb_device_id *id)
{
int response, ret = -ENOENT;
const struct firmware *loader_fw = NULL, *firmware_fw = NULL;
const struct ihex_binrec *record;
if (request_ihex_firmware(&firmware_fw, "whiteheat.fw",
&serial->dev->dev)) {
dev_err(&serial->dev->dev,
"%s - request \"whiteheat.fw\" failed\n", __func__);
goto out;
}
if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw",
&serial->dev->dev)) {
dev_err(&serial->dev->dev,
"%s - request \"whiteheat_loader.fw\" failed\n",
__func__);
goto out;
}
ret = 0;
response = ezusb_set_reset (serial, 1);
record = (const struct ihex_binrec *)loader_fw->data;
while (record) {
response = ezusb_writememory (serial, be32_to_cpu(record->addr),
(unsigned char *)record->data,
be16_to_cpu(record->len), 0xa0);
if (response < 0) {
dev_err(&serial->dev->dev, "%s - ezusb_writememory "
"failed for loader (%d %04X %p %d)\n",
__func__, response, be32_to_cpu(record->addr),
record->data, be16_to_cpu(record->len));
break;
}
record = ihex_next_binrec(record);
}
response = ezusb_set_reset(serial, 0);
record = (const struct ihex_binrec *)firmware_fw->data;
while (record && be32_to_cpu(record->addr) < 0x1b40)
record = ihex_next_binrec(record);
while (record) {
response = ezusb_writememory (serial, be32_to_cpu(record->addr),
(unsigned char *)record->data,
be16_to_cpu(record->len), 0xa3);
if (response < 0) {
dev_err(&serial->dev->dev, "%s - ezusb_writememory "
"failed for first firmware step "
"(%d %04X %p %d)\n", __func__, response,
be32_to_cpu(record->addr), record->data,
be16_to_cpu(record->len));
break;
}
++record;
}
response = ezusb_set_reset(serial, 1);
record = (const struct ihex_binrec *)firmware_fw->data;
while (record && be32_to_cpu(record->addr) < 0x1b40) {
response = ezusb_writememory (serial, be32_to_cpu(record->addr),
(unsigned char *)record->data,
be16_to_cpu(record->len), 0xa0);
if (response < 0) {
dev_err(&serial->dev->dev, "%s - ezusb_writememory "
"failed for second firmware step "
"(%d %04X %p %d)\n", __func__, response,
be32_to_cpu(record->addr), record->data,
be16_to_cpu(record->len));
break;
}
++record;
}
ret = 0;
response = ezusb_set_reset (serial, 0);
out:
release_firmware(loader_fw);
release_firmware(firmware_fw);
return ret;
}