1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Linux driver for TerraTec DMX 6Fire USB 4 * 5 * Firmware loader 6 * 7 * Author: Torsten Schenk <torsten.schenk@zoho.com> 8 * Created: Jan 01, 2011 9 * Copyright: (C) Torsten Schenk 10 */ 11 12 #include <linux/firmware.h> 13 #include <linux/module.h> 14 #include <linux/bitrev.h> 15 #include <linux/kernel.h> 16 17 #include "firmware.h" 18 #include "chip.h" 19 20 MODULE_FIRMWARE("6fire/dmx6firel2.ihx"); 21 MODULE_FIRMWARE("6fire/dmx6fireap.ihx"); 22 MODULE_FIRMWARE("6fire/dmx6firecf.bin"); 23 24 enum { 25 FPGA_BUFSIZE = 512, FPGA_EP = 2 26 }; 27 28 /* 29 * wMaxPacketSize of pcm endpoints. 30 * keep synced with rates_in_packet_size and rates_out_packet_size in pcm.c 31 * fpp: frames per isopacket 32 * 33 * CAUTION: keep sizeof <= buffer[] in usb6fire_fw_init 34 */ 35 static const u8 ep_w_max_packet_size[] = { 36 0xe4, 0x00, 0xe4, 0x00, /* alt 1: 228 EP2 and EP6 (7 fpp) */ 37 0xa4, 0x01, 0xa4, 0x01, /* alt 2: 420 EP2 and EP6 (13 fpp)*/ 38 0x94, 0x01, 0x5c, 0x02 /* alt 3: 404 EP2 and 604 EP6 (25 fpp) */ 39 }; 40 41 static const u8 known_fw_versions[][2] = { 42 { 0x03, 0x01 } 43 }; 44 45 struct ihex_record { 46 u16 address; 47 u8 len; 48 u8 data[256]; 49 char error; /* true if an error occurred parsing this record */ 50 51 u8 max_len; /* maximum record length in whole ihex */ 52 53 /* private */ 54 const char *txt_data; 55 unsigned int txt_length; 56 unsigned int txt_offset; /* current position in txt_data */ 57 }; 58 59 static u8 usb6fire_fw_ihex_hex(const u8 *data, u8 *crc) 60 { 61 u8 val = 0; 62 int hval; 63 64 hval = hex_to_bin(data[0]); 65 if (hval >= 0) 66 val |= (hval << 4); 67 68 hval = hex_to_bin(data[1]); 69 if (hval >= 0) 70 val |= hval; 71 72 *crc += val; 73 return val; 74 } 75 76 /* 77 * returns true if record is available, false otherwise. 78 * iff an error occurred, false will be returned and record->error will be true. 79 */ 80 static bool usb6fire_fw_ihex_next_record(struct ihex_record *record) 81 { 82 u8 crc = 0; 83 u8 type; 84 int i; 85 86 record->error = false; 87 88 /* find begin of record (marked by a colon) */ 89 while (record->txt_offset < record->txt_length 90 && record->txt_data[record->txt_offset] != ':') 91 record->txt_offset++; 92 if (record->txt_offset == record->txt_length) 93 return false; 94 95 /* number of characters needed for len, addr and type entries */ 96 record->txt_offset++; 97 if (record->txt_offset + 8 > record->txt_length) { 98 record->error = true; 99 return false; 100 } 101 102 record->len = usb6fire_fw_ihex_hex(record->txt_data + 103 record->txt_offset, &crc); 104 record->txt_offset += 2; 105 record->address = usb6fire_fw_ihex_hex(record->txt_data + 106 record->txt_offset, &crc) << 8; 107 record->txt_offset += 2; 108 record->address |= usb6fire_fw_ihex_hex(record->txt_data + 109 record->txt_offset, &crc); 110 record->txt_offset += 2; 111 type = usb6fire_fw_ihex_hex(record->txt_data + 112 record->txt_offset, &crc); 113 record->txt_offset += 2; 114 115 /* number of characters needed for data and crc entries */ 116 if (record->txt_offset + 2 * (record->len + 1) > record->txt_length) { 117 record->error = true; 118 return false; 119 } 120 for (i = 0; i < record->len; i++) { 121 record->data[i] = usb6fire_fw_ihex_hex(record->txt_data 122 + record->txt_offset, &crc); 123 record->txt_offset += 2; 124 } 125 usb6fire_fw_ihex_hex(record->txt_data + record->txt_offset, &crc); 126 if (crc) { 127 record->error = true; 128 return false; 129 } 130 131 if (type == 1 || !record->len) /* eof */ 132 return false; 133 else if (type == 0) 134 return true; 135 else { 136 record->error = true; 137 return false; 138 } 139 } 140 141 static int usb6fire_fw_ihex_init(const struct firmware *fw, 142 struct ihex_record *record) 143 { 144 record->txt_data = fw->data; 145 record->txt_length = fw->size; 146 record->txt_offset = 0; 147 record->max_len = 0; 148 /* read all records, if loop ends, record->error indicates, 149 * whether ihex is valid. */ 150 while (usb6fire_fw_ihex_next_record(record)) 151 record->max_len = max(record->len, record->max_len); 152 if (record->error) 153 return -EINVAL; 154 record->txt_offset = 0; 155 return 0; 156 } 157 158 static int usb6fire_fw_ezusb_write(struct usb_device *device, 159 int type, int value, char *data, int len) 160 { 161 return usb_control_msg_send(device, 0, type, 162 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 163 value, 0, data, len, HZ, GFP_KERNEL); 164 } 165 166 static int usb6fire_fw_ezusb_read(struct usb_device *device, 167 int type, int value, char *data, int len) 168 { 169 return usb_control_msg_recv(device, 0, type, 170 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 171 value, 0, data, len, HZ, GFP_KERNEL); 172 } 173 174 static int usb6fire_fw_fpga_write(struct usb_device *device, 175 char *data, int len) 176 { 177 int actual_len; 178 int ret; 179 180 ret = usb_bulk_msg(device, usb_sndbulkpipe(device, FPGA_EP), data, len, 181 &actual_len, HZ); 182 if (ret < 0) 183 return ret; 184 else if (actual_len != len) 185 return -EIO; 186 return 0; 187 } 188 189 static int usb6fire_fw_ezusb_upload( 190 struct usb_interface *intf, const char *fwname, 191 unsigned int postaddr, u8 *postdata, unsigned int postlen) 192 { 193 int ret; 194 u8 data; 195 struct usb_device *device = interface_to_usbdev(intf); 196 const struct firmware *fw = NULL; 197 struct ihex_record *rec = kmalloc(sizeof(struct ihex_record), 198 GFP_KERNEL); 199 200 if (!rec) 201 return -ENOMEM; 202 203 ret = request_firmware(&fw, fwname, &device->dev); 204 if (ret < 0) { 205 kfree(rec); 206 dev_err(&intf->dev, 207 "error requesting ezusb firmware %s.\n", fwname); 208 return ret; 209 } 210 ret = usb6fire_fw_ihex_init(fw, rec); 211 if (ret < 0) { 212 kfree(rec); 213 release_firmware(fw); 214 dev_err(&intf->dev, 215 "error validating ezusb firmware %s.\n", fwname); 216 return ret; 217 } 218 /* upload firmware image */ 219 data = 0x01; /* stop ezusb cpu */ 220 ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1); 221 if (ret) { 222 kfree(rec); 223 release_firmware(fw); 224 dev_err(&intf->dev, 225 "unable to upload ezusb firmware %s: begin message.\n", 226 fwname); 227 return ret; 228 } 229 230 while (usb6fire_fw_ihex_next_record(rec)) { /* write firmware */ 231 ret = usb6fire_fw_ezusb_write(device, 0xa0, rec->address, 232 rec->data, rec->len); 233 if (ret) { 234 kfree(rec); 235 release_firmware(fw); 236 dev_err(&intf->dev, 237 "unable to upload ezusb firmware %s: data urb.\n", 238 fwname); 239 return ret; 240 } 241 } 242 243 release_firmware(fw); 244 kfree(rec); 245 if (postdata) { /* write data after firmware has been uploaded */ 246 ret = usb6fire_fw_ezusb_write(device, 0xa0, postaddr, 247 postdata, postlen); 248 if (ret) { 249 dev_err(&intf->dev, 250 "unable to upload ezusb firmware %s: post urb.\n", 251 fwname); 252 return ret; 253 } 254 } 255 256 data = 0x00; /* resume ezusb cpu */ 257 ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1); 258 if (ret) { 259 dev_err(&intf->dev, 260 "unable to upload ezusb firmware %s: end message.\n", 261 fwname); 262 return ret; 263 } 264 return 0; 265 } 266 267 static int usb6fire_fw_fpga_upload( 268 struct usb_interface *intf, const char *fwname) 269 { 270 int ret; 271 int i; 272 struct usb_device *device = interface_to_usbdev(intf); 273 u8 *buffer = kmalloc(FPGA_BUFSIZE, GFP_KERNEL); 274 const char *c; 275 const char *end; 276 const struct firmware *fw; 277 278 if (!buffer) 279 return -ENOMEM; 280 281 ret = request_firmware(&fw, fwname, &device->dev); 282 if (ret < 0) { 283 dev_err(&intf->dev, "unable to get fpga firmware %s.\n", 284 fwname); 285 kfree(buffer); 286 return -EIO; 287 } 288 289 c = fw->data; 290 end = fw->data + fw->size; 291 292 ret = usb6fire_fw_ezusb_write(device, 8, 0, NULL, 0); 293 if (ret) { 294 kfree(buffer); 295 release_firmware(fw); 296 dev_err(&intf->dev, 297 "unable to upload fpga firmware: begin urb.\n"); 298 return ret; 299 } 300 301 while (c != end) { 302 for (i = 0; c != end && i < FPGA_BUFSIZE; i++, c++) 303 buffer[i] = bitrev8((u8)*c); 304 305 ret = usb6fire_fw_fpga_write(device, buffer, i); 306 if (ret < 0) { 307 release_firmware(fw); 308 kfree(buffer); 309 dev_err(&intf->dev, 310 "unable to upload fpga firmware: fw urb.\n"); 311 return ret; 312 } 313 } 314 release_firmware(fw); 315 kfree(buffer); 316 317 ret = usb6fire_fw_ezusb_write(device, 9, 0, NULL, 0); 318 if (ret) { 319 dev_err(&intf->dev, 320 "unable to upload fpga firmware: end urb.\n"); 321 return ret; 322 } 323 return 0; 324 } 325 326 /* check, if the firmware version the devices has currently loaded 327 * is known by this driver. 'version' needs to have 4 bytes version 328 * info data. */ 329 static int usb6fire_fw_check(struct usb_interface *intf, const u8 *version) 330 { 331 int i; 332 333 for (i = 0; i < ARRAY_SIZE(known_fw_versions); i++) 334 if (!memcmp(version, known_fw_versions + i, 2)) 335 return 0; 336 337 dev_err(&intf->dev, "invalid firmware version in device: %4ph. " 338 "please reconnect to power. if this failure " 339 "still happens, check your firmware installation.", 340 version); 341 return -EINVAL; 342 } 343 344 int usb6fire_fw_init(struct usb_interface *intf) 345 { 346 int i; 347 int ret; 348 struct usb_device *device = interface_to_usbdev(intf); 349 /* buffer: 8 receiving bytes from device and 350 * sizeof(EP_W_MAX_PACKET_SIZE) bytes for non-const copy */ 351 u8 buffer[12]; 352 353 ret = usb6fire_fw_ezusb_read(device, 1, 0, buffer, 8); 354 if (ret) { 355 dev_err(&intf->dev, 356 "unable to receive device firmware state.\n"); 357 return ret; 358 } 359 if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55) { 360 dev_err(&intf->dev, 361 "unknown device firmware state received from device:"); 362 for (i = 0; i < 8; i++) 363 printk(KERN_CONT "%02x ", buffer[i]); 364 printk(KERN_CONT "\n"); 365 return -EIO; 366 } 367 /* do we need fpga loader ezusb firmware? */ 368 if (buffer[3] == 0x01) { 369 ret = usb6fire_fw_ezusb_upload(intf, 370 "6fire/dmx6firel2.ihx", 0, NULL, 0); 371 if (ret < 0) 372 return ret; 373 return FW_NOT_READY; 374 } 375 /* do we need fpga firmware and application ezusb firmware? */ 376 else if (buffer[3] == 0x02) { 377 ret = usb6fire_fw_check(intf, buffer + 4); 378 if (ret < 0) 379 return ret; 380 ret = usb6fire_fw_fpga_upload(intf, "6fire/dmx6firecf.bin"); 381 if (ret < 0) 382 return ret; 383 memcpy(buffer, ep_w_max_packet_size, 384 sizeof(ep_w_max_packet_size)); 385 ret = usb6fire_fw_ezusb_upload(intf, "6fire/dmx6fireap.ihx", 386 0x0003, buffer, sizeof(ep_w_max_packet_size)); 387 if (ret < 0) 388 return ret; 389 return FW_NOT_READY; 390 } 391 /* all fw loaded? */ 392 else if (buffer[3] == 0x03) 393 return usb6fire_fw_check(intf, buffer + 4); 394 /* unknown data? */ 395 else { 396 dev_err(&intf->dev, 397 "unknown device firmware state received from device: "); 398 for (i = 0; i < 8; i++) 399 printk(KERN_CONT "%02x ", buffer[i]); 400 printk(KERN_CONT "\n"); 401 return -EIO; 402 } 403 return 0; 404 } 405 406