// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Linux driver for TerraTec DMX 6Fire USB
*
* Firmware loader
*
* Author: Torsten Schenk <[email protected]>
* Created: Jan 01, 2011
* Copyright: (C) Torsten Schenk
*/
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/bitrev.h>
#include <linux/kernel.h>
#include "firmware.h"
#include "chip.h"
MODULE_FIRMWARE("6fire/dmx6firel2.ihx");
MODULE_FIRMWARE("6fire/dmx6fireap.ihx");
MODULE_FIRMWARE("6fire/dmx6firecf.bin");
enum {
FPGA_BUFSIZE = 512, FPGA_EP = 2
};
/*
* wMaxPacketSize of pcm endpoints.
* keep synced with rates_in_packet_size and rates_out_packet_size in pcm.c
* fpp: frames per isopacket
*
* CAUTION: keep sizeof <= buffer[] in usb6fire_fw_init
*/
static const u8 ep_w_max_packet_size[] = {
0xe4, 0x00, 0xe4, 0x00, /* alt 1: 228 EP2 and EP6 (7 fpp) */
0xa4, 0x01, 0xa4, 0x01, /* alt 2: 420 EP2 and EP6 (13 fpp)*/
0x94, 0x01, 0x5c, 0x02 /* alt 3: 404 EP2 and 604 EP6 (25 fpp) */
};
static const u8 known_fw_versions[][2] = {
{ 0x03, 0x01 }
};
struct ihex_record {
u16 address;
u8 len;
u8 data[256];
char error; /* true if an error occurred parsing this record */
u8 max_len; /* maximum record length in whole ihex */
/* private */
const char *txt_data;
unsigned int txt_length;
unsigned int txt_offset; /* current position in txt_data */
};
static u8 usb6fire_fw_ihex_hex(const u8 *data, u8 *crc)
{
u8 val = 0;
int hval;
hval = hex_to_bin(data[0]);
if (hval >= 0)
val |= (hval << 4);
hval = hex_to_bin(data[1]);
if (hval >= 0)
val |= hval;
*crc += val;
return val;
}
/*
* returns true if record is available, false otherwise.
* iff an error occurred, false will be returned and record->error will be true.
*/
static bool usb6fire_fw_ihex_next_record(struct ihex_record *record)
{
u8 crc = 0;
u8 type;
int i;
record->error = false;
/* find begin of record (marked by a colon) */
while (record->txt_offset < record->txt_length
&& record->txt_data[record->txt_offset] != ':')
record->txt_offset++;
if (record->txt_offset == record->txt_length)
return false;
/* number of characters needed for len, addr and type entries */
record->txt_offset++;
if (record->txt_offset + 8 > record->txt_length) {
record->error = true;
return false;
}
record->len = usb6fire_fw_ihex_hex(record->txt_data +
record->txt_offset, &crc);
record->txt_offset += 2;
record->address = usb6fire_fw_ihex_hex(record->txt_data +
record->txt_offset, &crc) << 8;
record->txt_offset += 2;
record->address |= usb6fire_fw_ihex_hex(record->txt_data +
record->txt_offset, &crc);
record->txt_offset += 2;
type = usb6fire_fw_ihex_hex(record->txt_data +
record->txt_offset, &crc);
record->txt_offset += 2;
/* number of characters needed for data and crc entries */
if (record->txt_offset + 2 * (record->len + 1) > record->txt_length) {
record->error = true;
return false;
}
for (i = 0; i < record->len; i++) {
record->data[i] = usb6fire_fw_ihex_hex(record->txt_data
+ record->txt_offset, &crc);
record->txt_offset += 2;
}
usb6fire_fw_ihex_hex(record->txt_data + record->txt_offset, &crc);
if (crc) {
record->error = true;
return false;
}
if (type == 1 || !record->len) /* eof */
return false;
else if (type == 0)
return true;
else {
record->error = true;
return false;
}
}
static int usb6fire_fw_ihex_init(const struct firmware *fw,
struct ihex_record *record)
{
record->txt_data = fw->data;
record->txt_length = fw->size;
record->txt_offset = 0;
record->max_len = 0;
/* read all records, if loop ends, record->error indicates,
* whether ihex is valid. */
while (usb6fire_fw_ihex_next_record(record))
record->max_len = max(record->len, record->max_len);
if (record->error)
return -EINVAL;
record->txt_offset = 0;
return 0;
}
static int usb6fire_fw_ezusb_write(struct usb_device *device,
int type, int value, char *data, int len)
{
return usb_control_msg_send(device, 0, type,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, 0, data, len, 1000, GFP_KERNEL);
}
static int usb6fire_fw_ezusb_read(struct usb_device *device,
int type, int value, char *data, int len)
{
return usb_control_msg_recv(device, 0, type,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, 0, data, len, 1000, GFP_KERNEL);
}
static int usb6fire_fw_fpga_write(struct usb_device *device,
char *data, int len)
{
int actual_len;
int ret;
ret = usb_bulk_msg(device, usb_sndbulkpipe(device, FPGA_EP), data, len,
&actual_len, 1000);
if (ret < 0)
return ret;
else if (actual_len != len)
return -EIO;
return 0;
}
static int usb6fire_fw_ezusb_upload(
struct usb_interface *intf, const char *fwname,
unsigned int postaddr, u8 *postdata, unsigned int postlen)
{
int ret;
u8 data;
struct usb_device *device = interface_to_usbdev(intf);
const struct firmware *fw = NULL;
struct ihex_record *rec = kmalloc(sizeof(struct ihex_record),
GFP_KERNEL);
if (!rec)
return -ENOMEM;
ret = request_firmware(&fw, fwname, &device->dev);
if (ret < 0) {
kfree(rec);
dev_err(&intf->dev,
"error requesting ezusb firmware %s.\n", fwname);
return ret;
}
ret = usb6fire_fw_ihex_init(fw, rec);
if (ret < 0) {
kfree(rec);
release_firmware(fw);
dev_err(&intf->dev,
"error validating ezusb firmware %s.\n", fwname);
return ret;
}
/* upload firmware image */
data = 0x01; /* stop ezusb cpu */
ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1);
if (ret) {
kfree(rec);
release_firmware(fw);
dev_err(&intf->dev,
"unable to upload ezusb firmware %s: begin message.\n",
fwname);
return ret;
}
while (usb6fire_fw_ihex_next_record(rec)) { /* write firmware */
ret = usb6fire_fw_ezusb_write(device, 0xa0, rec->address,
rec->data, rec->len);
if (ret) {
kfree(rec);
release_firmware(fw);
dev_err(&intf->dev,
"unable to upload ezusb firmware %s: data urb.\n",
fwname);
return ret;
}
}
release_firmware(fw);
kfree(rec);
if (postdata) { /* write data after firmware has been uploaded */
ret = usb6fire_fw_ezusb_write(device, 0xa0, postaddr,
postdata, postlen);
if (ret) {
dev_err(&intf->dev,
"unable to upload ezusb firmware %s: post urb.\n",
fwname);
return ret;
}
}
data = 0x00; /* resume ezusb cpu */
ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1);
if (ret) {
dev_err(&intf->dev,
"unable to upload ezusb firmware %s: end message.\n",
fwname);
return ret;
}
return 0;
}
static int usb6fire_fw_fpga_upload(
struct usb_interface *intf, const char *fwname)
{
int ret;
int i;
struct usb_device *device = interface_to_usbdev(intf);
u8 *buffer = kmalloc(FPGA_BUFSIZE, GFP_KERNEL);
const char *c;
const char *end;
const struct firmware *fw;
if (!buffer)
return -ENOMEM;
ret = request_firmware(&fw, fwname, &device->dev);
if (ret < 0) {
dev_err(&intf->dev, "unable to get fpga firmware %s.\n",
fwname);
kfree(buffer);
return -EIO;
}
c = fw->data;
end = fw->data + fw->size;
ret = usb6fire_fw_ezusb_write(device, 8, 0, NULL, 0);
if (ret) {
kfree(buffer);
release_firmware(fw);
dev_err(&intf->dev,
"unable to upload fpga firmware: begin urb.\n");
return ret;
}
while (c != end) {
for (i = 0; c != end && i < FPGA_BUFSIZE; i++, c++)
buffer[i] = bitrev8((u8)*c);
ret = usb6fire_fw_fpga_write(device, buffer, i);
if (ret < 0) {
release_firmware(fw);
kfree(buffer);
dev_err(&intf->dev,
"unable to upload fpga firmware: fw urb.\n");
return ret;
}
}
release_firmware(fw);
kfree(buffer);
ret = usb6fire_fw_ezusb_write(device, 9, 0, NULL, 0);
if (ret) {
dev_err(&intf->dev,
"unable to upload fpga firmware: end urb.\n");
return ret;
}
return 0;
}
/* check, if the firmware version the devices has currently loaded
* is known by this driver. 'version' needs to have 4 bytes version
* info data. */
static int usb6fire_fw_check(struct usb_interface *intf, const u8 *version)
{
int i;
for (i = 0; i < ARRAY_SIZE(known_fw_versions); i++)
if (!memcmp(version, known_fw_versions + i, 2))
return 0;
dev_err(&intf->dev, "invalid firmware version in device: %4ph. "
"please reconnect to power. if this failure "
"still happens, check your firmware installation.",
version);
return -EINVAL;
}
int usb6fire_fw_init(struct usb_interface *intf)
{
int i;
int ret;
struct usb_device *device = interface_to_usbdev(intf);
/* buffer: 8 receiving bytes from device and
* sizeof(EP_W_MAX_PACKET_SIZE) bytes for non-const copy */
u8 buffer[12];
ret = usb6fire_fw_ezusb_read(device, 1, 0, buffer, 8);
if (ret) {
dev_err(&intf->dev,
"unable to receive device firmware state.\n");
return ret;
}
if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55) {
dev_err(&intf->dev,
"unknown device firmware state received from device:");
for (i = 0; i < 8; i++)
printk(KERN_CONT "%02x ", buffer[i]);
printk(KERN_CONT "\n");
return -EIO;
}
/* do we need fpga loader ezusb firmware? */
if (buffer[3] == 0x01) {
ret = usb6fire_fw_ezusb_upload(intf,
"6fire/dmx6firel2.ihx", 0, NULL, 0);
if (ret < 0)
return ret;
return FW_NOT_READY;
}
/* do we need fpga firmware and application ezusb firmware? */
else if (buffer[3] == 0x02) {
ret = usb6fire_fw_check(intf, buffer + 4);
if (ret < 0)
return ret;
ret = usb6fire_fw_fpga_upload(intf, "6fire/dmx6firecf.bin");
if (ret < 0)
return ret;
memcpy(buffer, ep_w_max_packet_size,
sizeof(ep_w_max_packet_size));
ret = usb6fire_fw_ezusb_upload(intf, "6fire/dmx6fireap.ihx",
0x0003, buffer, sizeof(ep_w_max_packet_size));
if (ret < 0)
return ret;
return FW_NOT_READY;
}
/* all fw loaded? */
else if (buffer[3] == 0x03)
return usb6fire_fw_check(intf, buffer + 4);
/* unknown data? */
else {
dev_err(&intf->dev,
"unknown device firmware state received from device: ");
for (i = 0; i < 8; i++)
printk(KERN_CONT "%02x ", buffer[i]);
printk(KERN_CONT "\n");
return -EIO;
}
return 0;
}
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