sound/usb/6fire/firmware.c

   1 /*
   2  * Linux driver for TerraTec DMX 6Fire USB
   3  *
   4  * Firmware loader
   5  *
   6  * Author:      Torsten Schenk <torsten.schenk@zoho.com>
   7  * Created:     Jan 01, 2011
   8  * Copyright:   (C) Torsten Schenk
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  */
  15
  16 #include <linux/firmware.h>
  17 #include <linux/module.h>
  18 #include <linux/bitrev.h>
  19 #include <linux/kernel.h>
  20
  21 #include "firmware.h"
  22 #include "chip.h"
  23
  24 MODULE_FIRMWARE("6fire/dmx6firel2.ihx");
  25 MODULE_FIRMWARE("6fire/dmx6fireap.ihx");
  26 MODULE_FIRMWARE("6fire/dmx6firecf.bin");
  27
  28 enum {
  29         FPGA_BUFSIZE = 512, FPGA_EP = 2
  30 };
  31
  32 /*
  33  * wMaxPacketSize of pcm endpoints.
  34  * keep synced with rates_in_packet_size and rates_out_packet_size in pcm.c
  35  * fpp: frames per isopacket
  36  *
  37  * CAUTION: keep sizeof <= buffer[] in usb6fire_fw_init
  38  */
  39 static const u8 ep_w_max_packet_size[] = {
  40         0xe4, 0x00, 0xe4, 0x00, /* alt 1: 228 EP2 and EP6 (7 fpp) */
  41         0xa4, 0x01, 0xa4, 0x01, /* alt 2: 420 EP2 and EP6 (13 fpp)*/
  42         0x94, 0x01, 0x5c, 0x02  /* alt 3: 404 EP2 and 604 EP6 (25 fpp) */
  43 };
  44
  45 static const u8 known_fw_versions[][2] = {
  46         { 0x03, 0x01 }
  47 };
  48
  49 struct ihex_record {
  50         u16 address;
  51         u8 len;
  52         u8 data[256];
  53         char error; /* true if an error occurred parsing this record */
  54
  55         u8 max_len; /* maximum record length in whole ihex */
  56
  57         /* private */
  58         const char *txt_data;
  59         unsigned int txt_length;
  60         unsigned int txt_offset; /* current position in txt_data */
  61 };
  62
  63 static u8 usb6fire_fw_ihex_hex(const u8 *data, u8 *crc)
  64 {
  65         u8 val = 0;
  66         int hval;
  67
  68         hval = hex_to_bin(data[0]);
  69         if (hval >= 0)
  70                 val |= (hval << 4);
  71
  72         hval = hex_to_bin(data[1]);
  73         if (hval >= 0)
  74                 val |= hval;
  75
  76         *crc += val;
  77         return val;
  78 }
  79
  80 /*
  81  * returns true if record is available, false otherwise.
  82  * iff an error occurred, false will be returned and record->error will be true.
  83  */
  84 static bool usb6fire_fw_ihex_next_record(struct ihex_record *record)
  85 {
  86         u8 crc = 0;
  87         u8 type;
  88         int i;
  89
  90         record->error = false;
  91
  92         /* find begin of record (marked by a colon) */
  93         while (record->txt_offset < record->txt_length
  94                         && record->txt_data[record->txt_offset] != ':')
  95                 record->txt_offset++;
  96         if (record->txt_offset == record->txt_length)
  97                 return false;
  98
  99         /* number of characters needed for len, addr and type entries */
 100         record->txt_offset++;
 101         if (record->txt_offset + 8 > record->txt_length) {
 102                 record->error = true;
 103                 return false;
 104         }
 105
 106         record->len = usb6fire_fw_ihex_hex(record->txt_data +
 107                         record->txt_offset, &crc);
 108         record->txt_offset += 2;
 109         record->address = usb6fire_fw_ihex_hex(record->txt_data +
 110                         record->txt_offset, &crc) << 8;
 111         record->txt_offset += 2;
 112         record->address |= usb6fire_fw_ihex_hex(record->txt_data +
 113                         record->txt_offset, &crc);
 114         record->txt_offset += 2;
 115         type = usb6fire_fw_ihex_hex(record->txt_data +
 116                         record->txt_offset, &crc);
 117         record->txt_offset += 2;
 118
 119         /* number of characters needed for data and crc entries */
 120         if (record->txt_offset + 2 * (record->len + 1) > record->txt_length) {
 121                 record->error = true;
 122                 return false;
 123         }
 124         for (i = 0; i < record->len; i++) {
 125                 record->data[i] = usb6fire_fw_ihex_hex(record->txt_data
 126                                 + record->txt_offset, &crc);
 127                 record->txt_offset += 2;
 128         }
 129         usb6fire_fw_ihex_hex(record->txt_data + record->txt_offset, &crc);
 130         if (crc) {
 131                 record->error = true;
 132                 return false;
 133         }
 134
 135         if (type == 1 || !record->len) /* eof */
 136                 return false;
 137         else if (type == 0)
 138                 return true;
 139         else {
 140                 record->error = true;
 141                 return false;
 142         }
 143 }
 144
 145 static int usb6fire_fw_ihex_init(const struct firmware *fw,
 146                 struct ihex_record *record)
 147 {
 148         record->txt_data = fw->data;
 149         record->txt_length = fw->size;
 150         record->txt_offset = 0;
 151         record->max_len = 0;
 152         /* read all records, if loop ends, record->error indicates,
 153          * whether ihex is valid. */
 154         while (usb6fire_fw_ihex_next_record(record))
 155                 record->max_len = max(record->len, record->max_len);
 156         if (record->error)
 157                 return -EINVAL;
 158         record->txt_offset = 0;
 159         return 0;
 160 }
 161
 162 static int usb6fire_fw_ezusb_write(struct usb_device *device,
 163                 int type, int value, char *data, int len)
 164 {
 165         int ret;
 166
 167         ret = usb_control_msg(device, usb_sndctrlpipe(device, 0), type,
 168                         USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 169                         value, 0, data, len, HZ);
 170         if (ret < 0)
 171                 return ret;
 172         else if (ret != len)
 173                 return -EIO;
 174         return 0;
 175 }
 176
 177 static int usb6fire_fw_ezusb_read(struct usb_device *device,
 178                 int type, int value, char *data, int len)
 179 {
 180         int ret = usb_control_msg(device, usb_rcvctrlpipe(device, 0), type,
 181                         USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value,
 182                         0, data, len, HZ);
 183         if (ret < 0)
 184                 return ret;
 185         else if (ret != len)
 186                 return -EIO;
 187         return 0;
 188 }
 189
 190 static int usb6fire_fw_fpga_write(struct usb_device *device,
 191                 char *data, int len)
 192 {
 193         int actual_len;
 194         int ret;
 195
 196         ret = usb_bulk_msg(device, usb_sndbulkpipe(device, FPGA_EP), data, len,
 197                         &actual_len, HZ);
 198         if (ret < 0)
 199                 return ret;
 200         else if (actual_len != len)
 201                 return -EIO;
 202         return 0;
 203 }
 204
 205 static int usb6fire_fw_ezusb_upload(
 206                 struct usb_interface *intf, const char *fwname,
 207                 unsigned int postaddr, u8 *postdata, unsigned int postlen)
 208 {
 209         int ret;
 210         u8 data;
 211         struct usb_device *device = interface_to_usbdev(intf);
 212         const struct firmware *fw = NULL;
 213         struct ihex_record *rec = kmalloc(sizeof(struct ihex_record),
 214                         GFP_KERNEL);
 215
 216         if (!rec)
 217                 return -ENOMEM;
 218
 219         ret = request_firmware(&fw, fwname, &device->dev);
 220         if (ret < 0) {
 221                 kfree(rec);
 222                 snd_printk(KERN_ERR PREFIX "error requesting ezusb "
 223                                 "firmware %s.\n", fwname);
 224                 return ret;
 225         }
 226         ret = usb6fire_fw_ihex_init(fw, rec);
 227         if (ret < 0) {
 228                 kfree(rec);
 229                 release_firmware(fw);
 230                 snd_printk(KERN_ERR PREFIX "error validating ezusb "
 231                                 "firmware %s.\n", fwname);
 232                 return ret;
 233         }
 234         /* upload firmware image */
 235         data = 0x01; /* stop ezusb cpu */
 236         ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1);
 237         if (ret < 0) {
 238                 kfree(rec);
 239                 release_firmware(fw);
 240                 snd_printk(KERN_ERR PREFIX "unable to upload ezusb "
 241                                 "firmware %s: begin message.\n", fwname);
 242                 return ret;
 243         }
 244
 245         while (usb6fire_fw_ihex_next_record(rec)) { /* write firmware */
 246                 ret = usb6fire_fw_ezusb_write(device, 0xa0, rec->address,
 247                                 rec->data, rec->len);
 248                 if (ret < 0) {
 249                         kfree(rec);
 250                         release_firmware(fw);
 251                         snd_printk(KERN_ERR PREFIX "unable to upload ezusb "
 252                                         "firmware %s: data urb.\n", fwname);
 253                         return ret;
 254                 }
 255         }
 256
 257         release_firmware(fw);
 258         kfree(rec);
 259         if (postdata) { /* write data after firmware has been uploaded */
 260                 ret = usb6fire_fw_ezusb_write(device, 0xa0, postaddr,
 261                                 postdata, postlen);
 262                 if (ret < 0) {
 263                         snd_printk(KERN_ERR PREFIX "unable to upload ezusb "
 264                                         "firmware %s: post urb.\n", fwname);
 265                         return ret;
 266                 }
 267         }
 268
 269         data = 0x00; /* resume ezusb cpu */
 270         ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1);
 271         if (ret < 0) {
 272                 snd_printk(KERN_ERR PREFIX "unable to upload ezusb "
 273                                 "firmware %s: end message.\n", fwname);
 274                 return ret;
 275         }
 276         return 0;
 277 }
 278
 279 static int usb6fire_fw_fpga_upload(
 280                 struct usb_interface *intf, const char *fwname)
 281 {
 282         int ret;
 283         int i;
 284         struct usb_device *device = interface_to_usbdev(intf);
 285         u8 *buffer = kmalloc(FPGA_BUFSIZE, GFP_KERNEL);
 286         const char *c;
 287         const char *end;
 288         const struct firmware *fw;
 289
 290         if (!buffer)
 291                 return -ENOMEM;
 292
 293         ret = request_firmware(&fw, fwname, &device->dev);
 294         if (ret < 0) {
 295                 snd_printk(KERN_ERR PREFIX "unable to get fpga firmware %s.\n",
 296                                 fwname);
 297                 kfree(buffer);
 298                 return -EIO;
 299         }
 300
 301         c = fw->data;
 302         end = fw->data + fw->size;
 303
 304         ret = usb6fire_fw_ezusb_write(device, 8, 0, NULL, 0);
 305         if (ret < 0) {
 306                 kfree(buffer);
 307                 release_firmware(fw);
 308                 snd_printk(KERN_ERR PREFIX "unable to upload fpga firmware: "
 309                                 "begin urb.\n");
 310                 return ret;
 311         }
 312
 313         while (c != end) {
 314                 for (i = 0; c != end && i < FPGA_BUFSIZE; i++, c++)
 315                         buffer[i] = byte_rev_table[(u8) *c];
 316
 317                 ret = usb6fire_fw_fpga_write(device, buffer, i);
 318                 if (ret < 0) {
 319                         release_firmware(fw);
 320                         kfree(buffer);
 321                         snd_printk(KERN_ERR PREFIX "unable to upload fpga "
 322                                         "firmware: fw urb.\n");
 323                         return ret;
 324                 }
 325         }
 326         release_firmware(fw);
 327         kfree(buffer);
 328
 329         ret = usb6fire_fw_ezusb_write(device, 9, 0, NULL, 0);
 330         if (ret < 0) {
 331                 snd_printk(KERN_ERR PREFIX "unable to upload fpga firmware: "
 332                                 "end urb.\n");
 333                 return ret;
 334         }
 335         return 0;
 336 }
 337
 338 /* check, if the firmware version the devices has currently loaded
 339  * is known by this driver. 'version' needs to have 4 bytes version
 340  * info data. */
 341 static int usb6fire_fw_check(u8 *version)
 342 {
 343         int i;
 344
 345         for (i = 0; i < ARRAY_SIZE(known_fw_versions); i++)
 346                 if (!memcmp(version, known_fw_versions + i, 2))
 347                         return 0;
 348
 349         snd_printk(KERN_ERR PREFIX "invalid fimware version in device: %*ph. "
 350                         "please reconnect to power. if this failure "
 351                         "still happens, check your firmware installation.",
 352                         4, version);
 353         return -EINVAL;
 354 }
 355
 356 int usb6fire_fw_init(struct usb_interface *intf)
 357 {
 358         int i;
 359         int ret;
 360         struct usb_device *device = interface_to_usbdev(intf);
 361         /* buffer: 8 receiving bytes from device and
 362          * sizeof(EP_W_MAX_PACKET_SIZE) bytes for non-const copy */
 363         u8 buffer[12];
 364
 365         ret = usb6fire_fw_ezusb_read(device, 1, 0, buffer, 8);
 366         if (ret < 0) {
 367                 snd_printk(KERN_ERR PREFIX "unable to receive device "
 368                                 "firmware state.\n");
 369                 return ret;
 370         }
 371         if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55) {
 372                 snd_printk(KERN_ERR PREFIX "unknown device firmware state "
 373                                 "received from device: ");
 374                 for (i = 0; i < 8; i++)
 375                         snd_printk("%02x ", buffer[i]);
 376                 snd_printk("\n");
 377                 return -EIO;
 378         }
 379         /* do we need fpga loader ezusb firmware? */
 380         if (buffer[3] == 0x01) {
 381                 ret = usb6fire_fw_ezusb_upload(intf,
 382                                 "6fire/dmx6firel2.ihx", 0, NULL, 0);
 383                 if (ret < 0)
 384                         return ret;
 385                 return FW_NOT_READY;
 386         }
 387         /* do we need fpga firmware and application ezusb firmware? */
 388         else if (buffer[3] == 0x02) {
 389                 ret = usb6fire_fw_check(buffer + 4);
 390                 if (ret < 0)
 391                         return ret;
 392                 ret = usb6fire_fw_fpga_upload(intf, "6fire/dmx6firecf.bin");
 393                 if (ret < 0)
 394                         return ret;
 395                 memcpy(buffer, ep_w_max_packet_size,
 396                                 sizeof(ep_w_max_packet_size));
 397                 ret = usb6fire_fw_ezusb_upload(intf, "6fire/dmx6fireap.ihx",
 398                                 0x0003, buffer, sizeof(ep_w_max_packet_size));
 399                 if (ret < 0)
 400                         return ret;
 401                 return FW_NOT_READY;
 402         }
 403         /* all fw loaded? */
 404         else if (buffer[3] == 0x03)
 405                 return usb6fire_fw_check(buffer + 4);
 406         /* unknown data? */
 407         else {
 408                 snd_printk(KERN_ERR PREFIX "unknown device firmware state "
 409                                 "received from device: ");
 410                 for (i = 0; i < 8; i++)
 411                         snd_printk("%02x ", buffer[i]);
 412                 snd_printk("\n");
 413                 return -EIO;
 414         }
 415         return 0;
 416 }
 417