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                 dev_err(&intf->dev,
 223                         "error requesting ezusb 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                 dev_err(&intf->dev,
 231                         "error validating ezusb 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                 dev_err(&intf->dev,
 241                         "unable to upload ezusb firmware %s: begin message.\n",
 242                         fwname);
 243                 return ret;
 244         }
 245
 246         while (usb6fire_fw_ihex_next_record(rec)) { /* write firmware */
 247                 ret = usb6fire_fw_ezusb_write(device, 0xa0, rec->address,
 248                                 rec->data, rec->len);
 249                 if (ret < 0) {
 250                         kfree(rec);
 251                         release_firmware(fw);
 252                         dev_err(&intf->dev,
 253                                 "unable to upload ezusb firmware %s: data urb.\n",
 254                                 fwname);
 255                         return ret;
 256                 }
 257         }
 258
 259         release_firmware(fw);
 260         kfree(rec);
 261         if (postdata) { /* write data after firmware has been uploaded */
 262                 ret = usb6fire_fw_ezusb_write(device, 0xa0, postaddr,
 263                                 postdata, postlen);
 264                 if (ret < 0) {
 265                         dev_err(&intf->dev,
 266                                 "unable to upload ezusb firmware %s: post urb.\n",
 267                                 fwname);
 268                         return ret;
 269                 }
 270         }
 271
 272         data = 0x00; /* resume ezusb cpu */
 273         ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1);
 274         if (ret < 0) {
 275                 dev_err(&intf->dev,
 276                         "unable to upload ezusb firmware %s: end message.\n",
 277                         fwname);
 278                 return ret;
 279         }
 280         return 0;
 281 }
 282
 283 static int usb6fire_fw_fpga_upload(
 284                 struct usb_interface *intf, const char *fwname)
 285 {
 286         int ret;
 287         int i;
 288         struct usb_device *device = interface_to_usbdev(intf);
 289         u8 *buffer = kmalloc(FPGA_BUFSIZE, GFP_KERNEL);
 290         const char *c;
 291         const char *end;
 292         const struct firmware *fw;
 293
 294         if (!buffer)
 295                 return -ENOMEM;
 296
 297         ret = request_firmware(&fw, fwname, &device->dev);
 298         if (ret < 0) {
 299                 dev_err(&intf->dev, "unable to get fpga firmware %s.\n",
 300                                 fwname);
 301                 kfree(buffer);
 302                 return -EIO;
 303         }
 304
 305         c = fw->data;
 306         end = fw->data + fw->size;
 307
 308         ret = usb6fire_fw_ezusb_write(device, 8, 0, NULL, 0);
 309         if (ret < 0) {
 310                 kfree(buffer);
 311                 release_firmware(fw);
 312                 dev_err(&intf->dev,
 313                         "unable to upload fpga firmware: begin urb.\n");
 314                 return ret;
 315         }
 316
 317         while (c != end) {
 318                 for (i = 0; c != end && i < FPGA_BUFSIZE; i++, c++)
 319                         buffer[i] = bitrev8((u8)*c);
 320
 321                 ret = usb6fire_fw_fpga_write(device, buffer, i);
 322                 if (ret < 0) {
 323                         release_firmware(fw);
 324                         kfree(buffer);
 325                         dev_err(&intf->dev,
 326                                 "unable to upload fpga firmware: fw urb.\n");
 327                         return ret;
 328                 }
 329         }
 330         release_firmware(fw);
 331         kfree(buffer);
 332
 333         ret = usb6fire_fw_ezusb_write(device, 9, 0, NULL, 0);
 334         if (ret < 0) {
 335                 dev_err(&intf->dev,
 336                         "unable to upload fpga firmware: end urb.\n");
 337                 return ret;
 338         }
 339         return 0;
 340 }
 341
 342 /* check, if the firmware version the devices has currently loaded
 343  * is known by this driver. 'version' needs to have 4 bytes version
 344  * info data. */
 345 static int usb6fire_fw_check(struct usb_interface *intf, const u8 *version)
 346 {
 347         int i;
 348
 349         for (i = 0; i < ARRAY_SIZE(known_fw_versions); i++)
 350                 if (!memcmp(version, known_fw_versions + i, 2))
 351                         return 0;
 352
 353         dev_err(&intf->dev, "invalid firmware version in device: %4ph. "
 354                         "please reconnect to power. if this failure "
 355                         "still happens, check your firmware installation.",
 356                         version);
 357         return -EINVAL;
 358 }
 359
 360 int usb6fire_fw_init(struct usb_interface *intf)
 361 {
 362         int i;
 363         int ret;
 364         struct usb_device *device = interface_to_usbdev(intf);
 365         /* buffer: 8 receiving bytes from device and
 366          * sizeof(EP_W_MAX_PACKET_SIZE) bytes for non-const copy */
 367         u8 buffer[12];
 368
 369         ret = usb6fire_fw_ezusb_read(device, 1, 0, buffer, 8);
 370         if (ret < 0) {
 371                 dev_err(&intf->dev,
 372                         "unable to receive device firmware state.\n");
 373                 return ret;
 374         }
 375         if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55) {
 376                 dev_err(&intf->dev,
 377                         "unknown device firmware state received from device:");
 378                 for (i = 0; i < 8; i++)
 379                         printk(KERN_CONT "%02x ", buffer[i]);
 380                 printk(KERN_CONT "\n");
 381                 return -EIO;
 382         }
 383         /* do we need fpga loader ezusb firmware? */
 384         if (buffer[3] == 0x01) {
 385                 ret = usb6fire_fw_ezusb_upload(intf,
 386                                 "6fire/dmx6firel2.ihx", 0, NULL, 0);
 387                 if (ret < 0)
 388                         return ret;
 389                 return FW_NOT_READY;
 390         }
 391         /* do we need fpga firmware and application ezusb firmware? */
 392         else if (buffer[3] == 0x02) {
 393                 ret = usb6fire_fw_check(intf, buffer + 4);
 394                 if (ret < 0)
 395                         return ret;
 396                 ret = usb6fire_fw_fpga_upload(intf, "6fire/dmx6firecf.bin");
 397                 if (ret < 0)
 398                         return ret;
 399                 memcpy(buffer, ep_w_max_packet_size,
 400                                 sizeof(ep_w_max_packet_size));
 401                 ret = usb6fire_fw_ezusb_upload(intf, "6fire/dmx6fireap.ihx",
 402                                 0x0003, buffer, sizeof(ep_w_max_packet_size));
 403                 if (ret < 0)
 404                         return ret;
 405                 return FW_NOT_READY;
 406         }
 407         /* all fw loaded? */
 408         else if (buffer[3] == 0x03)
 409                 return usb6fire_fw_check(intf, buffer + 4);
 410         /* unknown data? */
 411         else {
 412                 dev_err(&intf->dev,
 413                         "unknown device firmware state received from device: ");
 414                 for (i = 0; i < 8; i++)
 415                         printk(KERN_CONT "%02x ", buffer[i]);
 416                 printk(KERN_CONT "\n");
 417                 return -EIO;
 418         }
 419         return 0;
 420 }
 421