/*
* Linux driver for TerraTec DMX 6Fire USB
*
* Firmware loader
*
* Author: Torsten Schenk <torsten.schenk@zoho.com>
* Created: Jan 01, 2011
* Version: 0.3.0
* Copyright: (C) Torsten Schenk
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/firmware.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
};
static const u8 BIT_REVERSE_TABLE[256] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50,
0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8,
0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04,
0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4,
0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c,
0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82,
0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32,
0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46,
0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6,
0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e,
0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1,
0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71,
0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99,
0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25,
0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d,
0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3,
0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b,
0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb,
0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67,
0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f,
0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f,
0xbf, 0x7f, 0xff };
/*
* 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[][4] = {
{ 0x03, 0x01, 0x0b, 0x00 }
};
struct ihex_record {
u16 address;
u8 len;
u8 data[256];
char error; /* true if an error occured 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_nibble(const u8 n)
{
if (n >= '0' && n <= '9')
return n - '0';
else if (n >= 'A' && n <= 'F')
return n - ('A' - 10);
else if (n >= 'a' && n <= 'f')
return n - ('a' - 10);
return 0;
}
static u8 usb6fire_fw_ihex_hex(const u8 *data, u8 *crc)
{
u8 val = (usb6fire_fw_ihex_nibble(data[0]) << 4) |
usb6fire_fw_ihex_nibble(data[1]);
*crc += val;
return val;
}
/*
* returns true if record is available, false otherwise.
* iff an error occured, 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)
{
int ret;
ret = usb_control_msg(device, usb_sndctrlpipe(device, 0), type,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
value, 0, data, len, HZ);
if (ret < 0)
return ret;
else if (ret != len)
return -EIO;
return 0;
}
static int usb6fire_fw_ezusb_read(struct usb_device *device,
int type, int value, char *data, int len)
{
int ret = usb_control_msg(device, usb_rcvctrlpipe(device, 0), type,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value,
0, data, len, HZ);
if (ret < 0)
return ret;
else if (ret != len)
return -EIO;
return 0;
}
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, HZ);
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 = 0;
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);
snd_printk(KERN_ERR PREFIX "error requesting ezusb "
"firmware %s.\n", fwname);
return ret;
}
ret = usb6fire_fw_ihex_init(fw, rec);
if (ret < 0) {
kfree(rec);
snd_printk(KERN_ERR PREFIX "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 < 0) {
kfree(rec);
release_firmware(fw);
snd_printk(KERN_ERR PREFIX "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 < 0) {
kfree(rec);
release_firmware(fw);
snd_printk(KERN_ERR PREFIX "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 < 0) {
snd_printk(KERN_ERR PREFIX "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 < 0) {
release_firmware(fw);
snd_printk(KERN_ERR PREFIX "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) {
snd_printk(KERN_ERR PREFIX "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 < 0) {
kfree(buffer);
release_firmware(fw);
snd_printk(KERN_ERR PREFIX "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] = BIT_REVERSE_TABLE[(u8) *c];
ret = usb6fire_fw_fpga_write(device, buffer, i);
if (ret < 0) {
release_firmware(fw);
kfree(buffer);
snd_printk(KERN_ERR PREFIX "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 < 0) {
snd_printk(KERN_ERR PREFIX "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(u8 *version)
{
int i;
for (i = 0; i < ARRAY_SIZE(known_fw_versions); i++)
if (!memcmp(version, known_fw_versions + i, 4))
return 0;
snd_printk(KERN_ERR PREFIX "invalid fimware version in device: "
"%02x %02x %02x %02x. "
"please reconnect to power. if this failure "
"still happens, check your firmware installation.",
version[0], version[1], version[2], version[3]);
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 < 0) {
snd_printk(KERN_ERR PREFIX "unable to receive device "
"firmware state.\n");
return ret;
}
if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55) {
snd_printk(KERN_ERR PREFIX "unknown device firmware state "
"received from device: ");
for (i = 0; i < 8; i++)
snd_printk("%02x ", buffer[i]);
snd_printk("\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(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(buffer + 4);
/* unknown data? */
else {
snd_printk(KERN_ERR PREFIX "unknown device firmware state "
"received from device: ");
for (i = 0; i < 8; i++)
snd_printk("%02x ", buffer[i]);
snd_printk("\n");
return -EIO;
}
return 0;
}
