drivers/net/wireless/marvell/libertas/if_usb.c

   1 /*
   2  * This file contains functions used in USB interface module.
   3  */
   4
   5 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   6
   7 #include <linux/delay.h>
   8 #include <linux/module.h>
   9 #include <linux/firmware.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/slab.h>
  12 #include <linux/usb.h>
  13 #include <linux/olpc-ec.h>
  14
  15 #ifdef CONFIG_OLPC
  16 #include <asm/olpc.h>
  17 #endif
  18
  19 #define DRV_NAME "usb8xxx"
  20
  21 #include "host.h"
  22 #include "decl.h"
  23 #include "defs.h"
  24 #include "dev.h"
  25 #include "cmd.h"
  26 #include "if_usb.h"
  27
  28 #define INSANEDEBUG     0
  29 #define lbs_deb_usb2(...) do { if (INSANEDEBUG) lbs_deb_usbd(__VA_ARGS__); } while (0)
  30
  31 #define MESSAGE_HEADER_LEN      4
  32
  33 MODULE_FIRMWARE("libertas/usb8388_v9.bin");
  34 MODULE_FIRMWARE("libertas/usb8388_v5.bin");
  35 MODULE_FIRMWARE("libertas/usb8388.bin");
  36 MODULE_FIRMWARE("libertas/usb8682.bin");
  37 MODULE_FIRMWARE("usb8388.bin");
  38
  39 enum {
  40         MODEL_UNKNOWN = 0x0,
  41         MODEL_8388 = 0x1,
  42         MODEL_8682 = 0x2
  43 };
  44
  45 /* table of firmware file names */
  46 static const struct lbs_fw_table fw_table[] = {
  47         { MODEL_8388, "libertas/usb8388_olpc.bin", NULL },
  48         { MODEL_8388, "libertas/usb8388_v9.bin", NULL },
  49         { MODEL_8388, "libertas/usb8388_v5.bin", NULL },
  50         { MODEL_8388, "libertas/usb8388.bin", NULL },
  51         { MODEL_8388, "usb8388.bin", NULL },
  52         { MODEL_8682, "libertas/usb8682.bin", NULL }
  53 };
  54
  55 static struct usb_device_id if_usb_table[] = {
  56         /* Enter the device signature inside */
  57         { USB_DEVICE(0x1286, 0x2001), .driver_info = MODEL_8388 },
  58         { USB_DEVICE(0x05a3, 0x8388), .driver_info = MODEL_8388 },
  59         {}      /* Terminating entry */
  60 };
  61
  62 MODULE_DEVICE_TABLE(usb, if_usb_table);
  63
  64 static void if_usb_receive(struct urb *urb);
  65 static void if_usb_receive_fwload(struct urb *urb);
  66 static void if_usb_prog_firmware(struct lbs_private *priv, int ret,
  67                                  const struct firmware *fw,
  68                                  const struct firmware *unused);
  69 static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
  70                                uint8_t *payload, uint16_t nb);
  71 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload,
  72                         uint16_t nb);
  73 static void if_usb_free(struct if_usb_card *cardp);
  74 static int if_usb_submit_rx_urb(struct if_usb_card *cardp);
  75 static int if_usb_reset_device(struct if_usb_card *cardp);
  76
  77 /**
  78  * if_usb_write_bulk_callback - callback function to handle the status
  79  * of the URB
  80  * @urb:        pointer to &urb structure
  81  * returns:     N/A
  82  */
  83 static void if_usb_write_bulk_callback(struct urb *urb)
  84 {
  85         struct if_usb_card *cardp = (struct if_usb_card *) urb->context;
  86
  87         /* handle the transmission complete validations */
  88
  89         if (urb->status == 0) {
  90                 struct lbs_private *priv = cardp->priv;
  91
  92                 lbs_deb_usb2(&urb->dev->dev, "URB status is successful\n");
  93                 lbs_deb_usb2(&urb->dev->dev, "Actual length transmitted %d\n",
  94                              urb->actual_length);
  95
  96                 /* Boot commands such as UPDATE_FW and UPDATE_BOOT2 are not
  97                  * passed up to the lbs level.
  98                  */
  99                 if (priv && priv->dnld_sent != DNLD_BOOTCMD_SENT)
 100                         lbs_host_to_card_done(priv);
 101         } else {
 102                 /* print the failure status number for debug */
 103                 pr_info("URB in failure status: %d\n", urb->status);
 104         }
 105 }
 106
 107 /**
 108  * if_usb_free - free tx/rx urb, skb and rx buffer
 109  * @cardp:      pointer to &if_usb_card
 110  * returns:     N/A
 111  */
 112 static void if_usb_free(struct if_usb_card *cardp)
 113 {
 114         /* Unlink tx & rx urb */
 115         usb_kill_urb(cardp->tx_urb);
 116         usb_kill_urb(cardp->rx_urb);
 117
 118         usb_free_urb(cardp->tx_urb);
 119         cardp->tx_urb = NULL;
 120
 121         usb_free_urb(cardp->rx_urb);
 122         cardp->rx_urb = NULL;
 123
 124         kfree(cardp->ep_out_buf);
 125         cardp->ep_out_buf = NULL;
 126 }
 127
 128 static void if_usb_setup_firmware(struct lbs_private *priv)
 129 {
 130         struct if_usb_card *cardp = priv->card;
 131         struct cmd_ds_set_boot2_ver b2_cmd;
 132         struct cmd_ds_802_11_fw_wake_method wake_method;
 133
 134         b2_cmd.hdr.size = cpu_to_le16(sizeof(b2_cmd));
 135         b2_cmd.action = 0;
 136         b2_cmd.version = cardp->boot2_version;
 137
 138         if (lbs_cmd_with_response(priv, CMD_SET_BOOT2_VER, &b2_cmd))
 139                 lbs_deb_usb("Setting boot2 version failed\n");
 140
 141         priv->wol_gpio = 2; /* Wake via GPIO2... */
 142         priv->wol_gap = 20; /* ... after 20ms    */
 143         lbs_host_sleep_cfg(priv, EHS_WAKE_ON_UNICAST_DATA,
 144                         (struct wol_config *) NULL);
 145
 146         wake_method.hdr.size = cpu_to_le16(sizeof(wake_method));
 147         wake_method.action = cpu_to_le16(CMD_ACT_GET);
 148         if (lbs_cmd_with_response(priv, CMD_802_11_FW_WAKE_METHOD, &wake_method)) {
 149                 netdev_info(priv->dev, "Firmware does not seem to support PS mode\n");
 150                 priv->fwcapinfo &= ~FW_CAPINFO_PS;
 151         } else {
 152                 if (le16_to_cpu(wake_method.method) == CMD_WAKE_METHOD_COMMAND_INT) {
 153                         lbs_deb_usb("Firmware seems to support PS with wake-via-command\n");
 154                 } else {
 155                         /* The versions which boot up this way don't seem to
 156                            work even if we set it to the command interrupt */
 157                         priv->fwcapinfo &= ~FW_CAPINFO_PS;
 158                         netdev_info(priv->dev,
 159                                     "Firmware doesn't wake via command interrupt; disabling PS mode\n");
 160                 }
 161         }
 162 }
 163
 164 static void if_usb_fw_timeo(unsigned long priv)
 165 {
 166         struct if_usb_card *cardp = (void *)priv;
 167
 168         if (cardp->fwdnldover) {
 169                 lbs_deb_usb("Download complete, no event. Assuming success\n");
 170         } else {
 171                 pr_err("Download timed out\n");
 172                 cardp->surprise_removed = 1;
 173         }
 174         wake_up(&cardp->fw_wq);
 175 }
 176
 177 #ifdef CONFIG_OLPC
 178 static void if_usb_reset_olpc_card(struct lbs_private *priv)
 179 {
 180         printk(KERN_CRIT "Resetting OLPC wireless via EC...\n");
 181         olpc_ec_cmd(0x25, NULL, 0, NULL, 0);
 182 }
 183 #endif
 184
 185 /**
 186  * if_usb_probe - sets the configuration values
 187  * @intf:       &usb_interface pointer
 188  * @id: pointer to usb_device_id
 189  * returns:     0 on success, error code on failure
 190  */
 191 static int if_usb_probe(struct usb_interface *intf,
 192                         const struct usb_device_id *id)
 193 {
 194         struct usb_device *udev;
 195         struct usb_host_interface *iface_desc;
 196         struct usb_endpoint_descriptor *endpoint;
 197         struct lbs_private *priv;
 198         struct if_usb_card *cardp;
 199         int r = -ENOMEM;
 200         int i;
 201
 202         udev = interface_to_usbdev(intf);
 203
 204         cardp = kzalloc(sizeof(struct if_usb_card), GFP_KERNEL);
 205         if (!cardp)
 206                 goto error;
 207
 208         setup_timer(&cardp->fw_timeout, if_usb_fw_timeo, (unsigned long)cardp);
 209         init_waitqueue_head(&cardp->fw_wq);
 210
 211         cardp->udev = udev;
 212         cardp->model = (uint32_t) id->driver_info;
 213         iface_desc = intf->cur_altsetting;
 214
 215         lbs_deb_usbd(&udev->dev, "bcdUSB = 0x%X bDeviceClass = 0x%X"
 216                      " bDeviceSubClass = 0x%X, bDeviceProtocol = 0x%X\n",
 217                      le16_to_cpu(udev->descriptor.bcdUSB),
 218                      udev->descriptor.bDeviceClass,
 219                      udev->descriptor.bDeviceSubClass,
 220                      udev->descriptor.bDeviceProtocol);
 221
 222         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 223                 endpoint = &iface_desc->endpoint[i].desc;
 224                 if (usb_endpoint_is_bulk_in(endpoint)) {
 225                         cardp->ep_in_size = le16_to_cpu(endpoint->wMaxPacketSize);
 226                         cardp->ep_in = usb_endpoint_num(endpoint);
 227
 228                         lbs_deb_usbd(&udev->dev, "in_endpoint = %d\n", cardp->ep_in);
 229                         lbs_deb_usbd(&udev->dev, "Bulk in size is %d\n", cardp->ep_in_size);
 230
 231                 } else if (usb_endpoint_is_bulk_out(endpoint)) {
 232                         cardp->ep_out_size = le16_to_cpu(endpoint->wMaxPacketSize);
 233                         cardp->ep_out = usb_endpoint_num(endpoint);
 234
 235                         lbs_deb_usbd(&udev->dev, "out_endpoint = %d\n", cardp->ep_out);
 236                         lbs_deb_usbd(&udev->dev, "Bulk out size is %d\n", cardp->ep_out_size);
 237                 }
 238         }
 239         if (!cardp->ep_out_size || !cardp->ep_in_size) {
 240                 lbs_deb_usbd(&udev->dev, "Endpoints not found\n");
 241                 goto dealloc;
 242         }
 243         if (!(cardp->rx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
 244                 lbs_deb_usbd(&udev->dev, "Rx URB allocation failed\n");
 245                 goto dealloc;
 246         }
 247         if (!(cardp->tx_urb = usb_alloc_urb(0, GFP_KERNEL))) {
 248                 lbs_deb_usbd(&udev->dev, "Tx URB allocation failed\n");
 249                 goto dealloc;
 250         }
 251         cardp->ep_out_buf = kmalloc(MRVDRV_ETH_TX_PACKET_BUFFER_SIZE, GFP_KERNEL);
 252         if (!cardp->ep_out_buf) {
 253                 lbs_deb_usbd(&udev->dev, "Could not allocate buffer\n");
 254                 goto dealloc;
 255         }
 256
 257         if (!(priv = lbs_add_card(cardp, &intf->dev)))
 258                 goto err_add_card;
 259
 260         cardp->priv = priv;
 261
 262         priv->hw_host_to_card = if_usb_host_to_card;
 263         priv->enter_deep_sleep = NULL;
 264         priv->exit_deep_sleep = NULL;
 265         priv->reset_deep_sleep_wakeup = NULL;
 266         priv->is_polling = false;
 267 #ifdef CONFIG_OLPC
 268         if (machine_is_olpc())
 269                 priv->reset_card = if_usb_reset_olpc_card;
 270 #endif
 271
 272         cardp->boot2_version = udev->descriptor.bcdDevice;
 273
 274         usb_get_dev(udev);
 275         usb_set_intfdata(intf, cardp);
 276
 277         r = lbs_get_firmware_async(priv, &udev->dev, cardp->model,
 278                                    fw_table, if_usb_prog_firmware);
 279         if (r)
 280                 goto err_get_fw;
 281
 282         return 0;
 283
 284 err_get_fw:
 285         lbs_remove_card(priv);
 286 err_add_card:
 287         if_usb_reset_device(cardp);
 288 dealloc:
 289         if_usb_free(cardp);
 290
 291 error:
 292         return r;
 293 }
 294
 295 /**
 296  * if_usb_disconnect - free resource and cleanup
 297  * @intf:       USB interface structure
 298  * returns:     N/A
 299  */
 300 static void if_usb_disconnect(struct usb_interface *intf)
 301 {
 302         struct if_usb_card *cardp = usb_get_intfdata(intf);
 303         struct lbs_private *priv = cardp->priv;
 304
 305         cardp->surprise_removed = 1;
 306
 307         if (priv) {
 308                 lbs_stop_card(priv);
 309                 lbs_remove_card(priv);
 310         }
 311
 312         /* Unlink and free urb */
 313         if_usb_free(cardp);
 314
 315         usb_set_intfdata(intf, NULL);
 316         usb_put_dev(interface_to_usbdev(intf));
 317 }
 318
 319 /**
 320  * if_usb_send_fw_pkt - download FW
 321  * @cardp:      pointer to &struct if_usb_card
 322  * returns:     0
 323  */
 324 static int if_usb_send_fw_pkt(struct if_usb_card *cardp)
 325 {
 326         struct fwdata *fwdata = cardp->ep_out_buf;
 327         const uint8_t *firmware = cardp->fw->data;
 328
 329         /* If we got a CRC failure on the last block, back
 330            up and retry it */
 331         if (!cardp->CRC_OK) {
 332                 cardp->totalbytes = cardp->fwlastblksent;
 333                 cardp->fwseqnum--;
 334         }
 335
 336         lbs_deb_usb2(&cardp->udev->dev, "totalbytes = %d\n",
 337                      cardp->totalbytes);
 338
 339         /* struct fwdata (which we sent to the card) has an
 340            extra __le32 field in between the header and the data,
 341            which is not in the struct fwheader in the actual
 342            firmware binary. Insert the seqnum in the middle... */
 343         memcpy(&fwdata->hdr, &firmware[cardp->totalbytes],
 344                sizeof(struct fwheader));
 345
 346         cardp->fwlastblksent = cardp->totalbytes;
 347         cardp->totalbytes += sizeof(struct fwheader);
 348
 349         memcpy(fwdata->data, &firmware[cardp->totalbytes],
 350                le32_to_cpu(fwdata->hdr.datalength));
 351
 352         lbs_deb_usb2(&cardp->udev->dev, "Data length = %d\n",
 353                      le32_to_cpu(fwdata->hdr.datalength));
 354
 355         fwdata->seqnum = cpu_to_le32(++cardp->fwseqnum);
 356         cardp->totalbytes += le32_to_cpu(fwdata->hdr.datalength);
 357
 358         usb_tx_block(cardp, cardp->ep_out_buf, sizeof(struct fwdata) +
 359                      le32_to_cpu(fwdata->hdr.datalength));
 360
 361         if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_DATA_TO_RECV)) {
 362                 lbs_deb_usb2(&cardp->udev->dev, "There are data to follow\n");
 363                 lbs_deb_usb2(&cardp->udev->dev, "seqnum = %d totalbytes = %d\n",
 364                              cardp->fwseqnum, cardp->totalbytes);
 365         } else if (fwdata->hdr.dnldcmd == cpu_to_le32(FW_HAS_LAST_BLOCK)) {
 366                 lbs_deb_usb2(&cardp->udev->dev, "Host has finished FW downloading\n");
 367                 lbs_deb_usb2(&cardp->udev->dev, "Donwloading FW JUMP BLOCK\n");
 368
 369                 cardp->fwfinalblk = 1;
 370         }
 371
 372         lbs_deb_usb2(&cardp->udev->dev, "Firmware download done; size %d\n",
 373                      cardp->totalbytes);
 374
 375         return 0;
 376 }
 377
 378 static int if_usb_reset_device(struct if_usb_card *cardp)
 379 {
 380         struct cmd_header *cmd = cardp->ep_out_buf + 4;
 381         int ret;
 382
 383         *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
 384
 385         cmd->command = cpu_to_le16(CMD_802_11_RESET);
 386         cmd->size = cpu_to_le16(sizeof(cmd));
 387         cmd->result = cpu_to_le16(0);
 388         cmd->seqnum = cpu_to_le16(0x5a5a);
 389         usb_tx_block(cardp, cardp->ep_out_buf, 4 + sizeof(struct cmd_header));
 390
 391         msleep(100);
 392         ret = usb_reset_device(cardp->udev);
 393         msleep(100);
 394
 395 #ifdef CONFIG_OLPC
 396         if (ret && machine_is_olpc())
 397                 if_usb_reset_olpc_card(NULL);
 398 #endif
 399
 400         return ret;
 401 }
 402
 403 /**
 404  *  usb_tx_block - transfer the data to the device
 405  *  @cardp:     pointer to &struct if_usb_card
 406  *  @payload:   pointer to payload data
 407  *  @nb:        data length
 408  *  returns:    0 for success or negative error code
 409  */
 410 static int usb_tx_block(struct if_usb_card *cardp, uint8_t *payload, uint16_t nb)
 411 {
 412         int ret;
 413
 414         /* check if device is removed */
 415         if (cardp->surprise_removed) {
 416                 lbs_deb_usbd(&cardp->udev->dev, "Device removed\n");
 417                 ret = -ENODEV;
 418                 goto tx_ret;
 419         }
 420
 421         usb_fill_bulk_urb(cardp->tx_urb, cardp->udev,
 422                           usb_sndbulkpipe(cardp->udev,
 423                                           cardp->ep_out),
 424                           payload, nb, if_usb_write_bulk_callback, cardp);
 425
 426         cardp->tx_urb->transfer_flags |= URB_ZERO_PACKET;
 427
 428         if ((ret = usb_submit_urb(cardp->tx_urb, GFP_ATOMIC))) {
 429                 lbs_deb_usbd(&cardp->udev->dev, "usb_submit_urb failed: %d\n", ret);
 430         } else {
 431                 lbs_deb_usb2(&cardp->udev->dev, "usb_submit_urb success\n");
 432                 ret = 0;
 433         }
 434
 435 tx_ret:
 436         return ret;
 437 }
 438
 439 static int __if_usb_submit_rx_urb(struct if_usb_card *cardp,
 440                                   void (*callbackfn)(struct urb *urb))
 441 {
 442         struct sk_buff *skb;
 443         int ret = -1;
 444
 445         if (!(skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE))) {
 446                 pr_err("No free skb\n");
 447                 goto rx_ret;
 448         }
 449
 450         cardp->rx_skb = skb;
 451
 452         /* Fill the receive configuration URB and initialise the Rx call back */
 453         usb_fill_bulk_urb(cardp->rx_urb, cardp->udev,
 454                           usb_rcvbulkpipe(cardp->udev, cardp->ep_in),
 455                           skb->data + IPFIELD_ALIGN_OFFSET,
 456                           MRVDRV_ETH_RX_PACKET_BUFFER_SIZE, callbackfn,
 457                           cardp);
 458
 459         cardp->rx_urb->transfer_flags |= URB_ZERO_PACKET;
 460
 461         lbs_deb_usb2(&cardp->udev->dev, "Pointer for rx_urb %p\n", cardp->rx_urb);
 462         if ((ret = usb_submit_urb(cardp->rx_urb, GFP_ATOMIC))) {
 463                 lbs_deb_usbd(&cardp->udev->dev, "Submit Rx URB failed: %d\n", ret);
 464                 kfree_skb(skb);
 465                 cardp->rx_skb = NULL;
 466                 ret = -1;
 467         } else {
 468                 lbs_deb_usb2(&cardp->udev->dev, "Submit Rx URB success\n");
 469                 ret = 0;
 470         }
 471
 472 rx_ret:
 473         return ret;
 474 }
 475
 476 static int if_usb_submit_rx_urb_fwload(struct if_usb_card *cardp)
 477 {
 478         return __if_usb_submit_rx_urb(cardp, &if_usb_receive_fwload);
 479 }
 480
 481 static int if_usb_submit_rx_urb(struct if_usb_card *cardp)
 482 {
 483         return __if_usb_submit_rx_urb(cardp, &if_usb_receive);
 484 }
 485
 486 static void if_usb_receive_fwload(struct urb *urb)
 487 {
 488         struct if_usb_card *cardp = urb->context;
 489         struct sk_buff *skb = cardp->rx_skb;
 490         struct fwsyncheader *syncfwheader;
 491         struct bootcmdresp bootcmdresp;
 492
 493         if (urb->status) {
 494                 lbs_deb_usbd(&cardp->udev->dev,
 495                              "URB status is failed during fw load\n");
 496                 kfree_skb(skb);
 497                 return;
 498         }
 499
 500         if (cardp->fwdnldover) {
 501                 __le32 *tmp = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
 502
 503                 if (tmp[0] == cpu_to_le32(CMD_TYPE_INDICATION) &&
 504                     tmp[1] == cpu_to_le32(MACREG_INT_CODE_FIRMWARE_READY)) {
 505                         pr_info("Firmware ready event received\n");
 506                         wake_up(&cardp->fw_wq);
 507                 } else {
 508                         lbs_deb_usb("Waiting for confirmation; got %x %x\n",
 509                                     le32_to_cpu(tmp[0]), le32_to_cpu(tmp[1]));
 510                         if_usb_submit_rx_urb_fwload(cardp);
 511                 }
 512                 kfree_skb(skb);
 513                 return;
 514         }
 515         if (cardp->bootcmdresp <= 0) {
 516                 memcpy (&bootcmdresp, skb->data + IPFIELD_ALIGN_OFFSET,
 517                         sizeof(bootcmdresp));
 518
 519                 if (le16_to_cpu(cardp->udev->descriptor.bcdDevice) < 0x3106) {
 520                         kfree_skb(skb);
 521                         if_usb_submit_rx_urb_fwload(cardp);
 522                         cardp->bootcmdresp = BOOT_CMD_RESP_OK;
 523                         lbs_deb_usbd(&cardp->udev->dev,
 524                                      "Received valid boot command response\n");
 525                         return;
 526                 }
 527                 if (bootcmdresp.magic != cpu_to_le32(BOOT_CMD_MAGIC_NUMBER)) {
 528                         if (bootcmdresp.magic == cpu_to_le32(CMD_TYPE_REQUEST) ||
 529                             bootcmdresp.magic == cpu_to_le32(CMD_TYPE_DATA) ||
 530                             bootcmdresp.magic == cpu_to_le32(CMD_TYPE_INDICATION)) {
 531                                 if (!cardp->bootcmdresp)
 532                                         pr_info("Firmware already seems alive; resetting\n");
 533                                 cardp->bootcmdresp = -1;
 534                         } else {
 535                                 pr_info("boot cmd response wrong magic number (0x%x)\n",
 536                                             le32_to_cpu(bootcmdresp.magic));
 537                         }
 538                 } else if ((bootcmdresp.cmd != BOOT_CMD_FW_BY_USB) &&
 539                            (bootcmdresp.cmd != BOOT_CMD_UPDATE_FW) &&
 540                            (bootcmdresp.cmd != BOOT_CMD_UPDATE_BOOT2)) {
 541                         pr_info("boot cmd response cmd_tag error (%d)\n",
 542                                 bootcmdresp.cmd);
 543                 } else if (bootcmdresp.result != BOOT_CMD_RESP_OK) {
 544                         pr_info("boot cmd response result error (%d)\n",
 545                                 bootcmdresp.result);
 546                 } else {
 547                         cardp->bootcmdresp = 1;
 548                         lbs_deb_usbd(&cardp->udev->dev,
 549                                      "Received valid boot command response\n");
 550                 }
 551                 kfree_skb(skb);
 552                 if_usb_submit_rx_urb_fwload(cardp);
 553                 return;
 554         }
 555
 556         syncfwheader = kmemdup(skb->data + IPFIELD_ALIGN_OFFSET,
 557                                sizeof(struct fwsyncheader), GFP_ATOMIC);
 558         if (!syncfwheader) {
 559                 lbs_deb_usbd(&cardp->udev->dev, "Failure to allocate syncfwheader\n");
 560                 kfree_skb(skb);
 561                 return;
 562         }
 563
 564         if (!syncfwheader->cmd) {
 565                 lbs_deb_usb2(&cardp->udev->dev, "FW received Blk with correct CRC\n");
 566                 lbs_deb_usb2(&cardp->udev->dev, "FW received Blk seqnum = %d\n",
 567                              le32_to_cpu(syncfwheader->seqnum));
 568                 cardp->CRC_OK = 1;
 569         } else {
 570                 lbs_deb_usbd(&cardp->udev->dev, "FW received Blk with CRC error\n");
 571                 cardp->CRC_OK = 0;
 572         }
 573
 574         kfree_skb(skb);
 575
 576         /* Give device 5s to either write firmware to its RAM or eeprom */
 577         mod_timer(&cardp->fw_timeout, jiffies + (HZ*5));
 578
 579         if (cardp->fwfinalblk) {
 580                 cardp->fwdnldover = 1;
 581                 goto exit;
 582         }
 583
 584         if_usb_send_fw_pkt(cardp);
 585
 586  exit:
 587         if_usb_submit_rx_urb_fwload(cardp);
 588
 589         kfree(syncfwheader);
 590 }
 591
 592 #define MRVDRV_MIN_PKT_LEN      30
 593
 594 static inline void process_cmdtypedata(int recvlength, struct sk_buff *skb,
 595                                        struct if_usb_card *cardp,
 596                                        struct lbs_private *priv)
 597 {
 598         if (recvlength > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + MESSAGE_HEADER_LEN
 599             || recvlength < MRVDRV_MIN_PKT_LEN) {
 600                 lbs_deb_usbd(&cardp->udev->dev, "Packet length is Invalid\n");
 601                 kfree_skb(skb);
 602                 return;
 603         }
 604
 605         skb_reserve(skb, IPFIELD_ALIGN_OFFSET);
 606         skb_put(skb, recvlength);
 607         skb_pull(skb, MESSAGE_HEADER_LEN);
 608
 609         lbs_process_rxed_packet(priv, skb);
 610 }
 611
 612 static inline void process_cmdrequest(int recvlength, uint8_t *recvbuff,
 613                                       struct sk_buff *skb,
 614                                       struct if_usb_card *cardp,
 615                                       struct lbs_private *priv)
 616 {
 617         u8 i;
 618
 619         if (recvlength > LBS_CMD_BUFFER_SIZE) {
 620                 lbs_deb_usbd(&cardp->udev->dev,
 621                              "The receive buffer is too large\n");
 622                 kfree_skb(skb);
 623                 return;
 624         }
 625
 626         BUG_ON(!in_interrupt());
 627
 628         spin_lock(&priv->driver_lock);
 629
 630         i = (priv->resp_idx == 0) ? 1 : 0;
 631         BUG_ON(priv->resp_len[i]);
 632         priv->resp_len[i] = (recvlength - MESSAGE_HEADER_LEN);
 633         memcpy(priv->resp_buf[i], recvbuff + MESSAGE_HEADER_LEN,
 634                 priv->resp_len[i]);
 635         kfree_skb(skb);
 636         lbs_notify_command_response(priv, i);
 637
 638         spin_unlock(&priv->driver_lock);
 639
 640         lbs_deb_usbd(&cardp->udev->dev,
 641                     "Wake up main thread to handle cmd response\n");
 642 }
 643
 644 /**
 645  *  if_usb_receive - read the packet into the upload buffer,
 646  *  wake up the main thread and initialise the Rx callack
 647  *
 648  *  @urb:       pointer to &struct urb
 649  *  returns:    N/A
 650  */
 651 static void if_usb_receive(struct urb *urb)
 652 {
 653         struct if_usb_card *cardp = urb->context;
 654         struct sk_buff *skb = cardp->rx_skb;
 655         struct lbs_private *priv = cardp->priv;
 656         int recvlength = urb->actual_length;
 657         uint8_t *recvbuff = NULL;
 658         uint32_t recvtype = 0;
 659         __le32 *pkt = (__le32 *)(skb->data + IPFIELD_ALIGN_OFFSET);
 660         uint32_t event;
 661
 662         if (recvlength) {
 663                 if (urb->status) {
 664                         lbs_deb_usbd(&cardp->udev->dev, "RX URB failed: %d\n",
 665                                      urb->status);
 666                         kfree_skb(skb);
 667                         goto setup_for_next;
 668                 }
 669
 670                 recvbuff = skb->data + IPFIELD_ALIGN_OFFSET;
 671                 recvtype = le32_to_cpu(pkt[0]);
 672                 lbs_deb_usbd(&cardp->udev->dev,
 673                             "Recv length = 0x%x, Recv type = 0x%X\n",
 674                             recvlength, recvtype);
 675         } else if (urb->status) {
 676                 kfree_skb(skb);
 677                 return;
 678         }
 679
 680         switch (recvtype) {
 681         case CMD_TYPE_DATA:
 682                 process_cmdtypedata(recvlength, skb, cardp, priv);
 683                 break;
 684
 685         case CMD_TYPE_REQUEST:
 686                 process_cmdrequest(recvlength, recvbuff, skb, cardp, priv);
 687                 break;
 688
 689         case CMD_TYPE_INDICATION:
 690                 /* Event handling */
 691                 event = le32_to_cpu(pkt[1]);
 692                 lbs_deb_usbd(&cardp->udev->dev, "**EVENT** 0x%X\n", event);
 693                 kfree_skb(skb);
 694
 695                 /* Icky undocumented magic special case */
 696                 if (event & 0xffff0000) {
 697                         u32 trycount = (event & 0xffff0000) >> 16;
 698
 699                         lbs_send_tx_feedback(priv, trycount);
 700                 } else
 701                         lbs_queue_event(priv, event & 0xFF);
 702                 break;
 703
 704         default:
 705                 lbs_deb_usbd(&cardp->udev->dev, "Unknown command type 0x%X\n",
 706                              recvtype);
 707                 kfree_skb(skb);
 708                 break;
 709         }
 710
 711 setup_for_next:
 712         if_usb_submit_rx_urb(cardp);
 713 }
 714
 715 /**
 716  *  if_usb_host_to_card - downloads data to FW
 717  *  @priv:      pointer to &struct lbs_private structure
 718  *  @type:      type of data
 719  *  @payload:   pointer to data buffer
 720  *  @nb:        number of bytes
 721  *  returns:    0 for success or negative error code
 722  */
 723 static int if_usb_host_to_card(struct lbs_private *priv, uint8_t type,
 724                                uint8_t *payload, uint16_t nb)
 725 {
 726         struct if_usb_card *cardp = priv->card;
 727
 728         lbs_deb_usbd(&cardp->udev->dev,"*** type = %u\n", type);
 729         lbs_deb_usbd(&cardp->udev->dev,"size after = %d\n", nb);
 730
 731         if (type == MVMS_CMD) {
 732                 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_REQUEST);
 733                 priv->dnld_sent = DNLD_CMD_SENT;
 734         } else {
 735                 *(__le32 *)cardp->ep_out_buf = cpu_to_le32(CMD_TYPE_DATA);
 736                 priv->dnld_sent = DNLD_DATA_SENT;
 737         }
 738
 739         memcpy((cardp->ep_out_buf + MESSAGE_HEADER_LEN), payload, nb);
 740
 741         return usb_tx_block(cardp, cardp->ep_out_buf, nb + MESSAGE_HEADER_LEN);
 742 }
 743
 744 /**
 745  *  if_usb_issue_boot_command - issues Boot command to the Boot2 code
 746  *  @cardp:     pointer to &if_usb_card
 747  *  @ivalue:    1:Boot from FW by USB-Download
 748  *              2:Boot from FW in EEPROM
 749  *  returns:    0 for success or negative error code
 750  */
 751 static int if_usb_issue_boot_command(struct if_usb_card *cardp, int ivalue)
 752 {
 753         struct bootcmd *bootcmd = cardp->ep_out_buf;
 754
 755         /* Prepare command */
 756         bootcmd->magic = cpu_to_le32(BOOT_CMD_MAGIC_NUMBER);
 757         bootcmd->cmd = ivalue;
 758         memset(bootcmd->pad, 0, sizeof(bootcmd->pad));
 759
 760         /* Issue command */
 761         usb_tx_block(cardp, cardp->ep_out_buf, sizeof(*bootcmd));
 762
 763         return 0;
 764 }
 765
 766
 767 /**
 768  *  check_fwfile_format - check the validity of Boot2/FW image
 769  *
 770  *  @data:      pointer to image
 771  *  @totlen:    image length
 772  *  returns:     0 (good) or 1 (failure)
 773  */
 774 static int check_fwfile_format(const uint8_t *data, uint32_t totlen)
 775 {
 776         uint32_t bincmd, exit;
 777         uint32_t blksize, offset, len;
 778         int ret;
 779
 780         ret = 1;
 781         exit = len = 0;
 782
 783         do {
 784                 struct fwheader *fwh = (void *)data;
 785
 786                 bincmd = le32_to_cpu(fwh->dnldcmd);
 787                 blksize = le32_to_cpu(fwh->datalength);
 788                 switch (bincmd) {
 789                 case FW_HAS_DATA_TO_RECV:
 790                         offset = sizeof(struct fwheader) + blksize;
 791                         data += offset;
 792                         len += offset;
 793                         if (len >= totlen)
 794                                 exit = 1;
 795                         break;
 796                 case FW_HAS_LAST_BLOCK:
 797                         exit = 1;
 798                         ret = 0;
 799                         break;
 800                 default:
 801                         exit = 1;
 802                         break;
 803                 }
 804         } while (!exit);
 805
 806         if (ret)
 807                 pr_err("firmware file format check FAIL\n");
 808         else
 809                 lbs_deb_fw("firmware file format check PASS\n");
 810
 811         return ret;
 812 }
 813
 814 static void if_usb_prog_firmware(struct lbs_private *priv, int ret,
 815                                  const struct firmware *fw,
 816                                  const struct firmware *unused)
 817 {
 818         struct if_usb_card *cardp = priv->card;
 819         int i = 0;
 820         static int reset_count = 10;
 821
 822         if (ret) {
 823                 pr_err("failed to find firmware (%d)\n", ret);
 824                 goto done;
 825         }
 826
 827         cardp->fw = fw;
 828         if (check_fwfile_format(cardp->fw->data, cardp->fw->size)) {
 829                 ret = -EINVAL;
 830                 goto done;
 831         }
 832
 833         /* Cancel any pending usb business */
 834         usb_kill_urb(cardp->rx_urb);
 835         usb_kill_urb(cardp->tx_urb);
 836
 837         cardp->fwlastblksent = 0;
 838         cardp->fwdnldover = 0;
 839         cardp->totalbytes = 0;
 840         cardp->fwfinalblk = 0;
 841         cardp->bootcmdresp = 0;
 842
 843 restart:
 844         if (if_usb_submit_rx_urb_fwload(cardp) < 0) {
 845                 lbs_deb_usbd(&cardp->udev->dev, "URB submission is failed\n");
 846                 ret = -EIO;
 847                 goto done;
 848         }
 849
 850         cardp->bootcmdresp = 0;
 851         do {
 852                 int j = 0;
 853                 i++;
 854                 if_usb_issue_boot_command(cardp, BOOT_CMD_FW_BY_USB);
 855                 /* wait for command response */
 856                 do {
 857                         j++;
 858                         msleep_interruptible(100);
 859                 } while (cardp->bootcmdresp == 0 && j < 10);
 860         } while (cardp->bootcmdresp == 0 && i < 5);
 861
 862         if (cardp->bootcmdresp == BOOT_CMD_RESP_NOT_SUPPORTED) {
 863                 /* Return to normal operation */
 864                 ret = -EOPNOTSUPP;
 865                 usb_kill_urb(cardp->rx_urb);
 866                 usb_kill_urb(cardp->tx_urb);
 867                 if (if_usb_submit_rx_urb(cardp) < 0)
 868                         ret = -EIO;
 869                 goto done;
 870         } else if (cardp->bootcmdresp <= 0) {
 871                 if (--reset_count >= 0) {
 872                         if_usb_reset_device(cardp);
 873                         goto restart;
 874                 }
 875                 ret = -EIO;
 876                 goto done;
 877         }
 878
 879         i = 0;
 880
 881         cardp->totalbytes = 0;
 882         cardp->fwlastblksent = 0;
 883         cardp->CRC_OK = 1;
 884         cardp->fwdnldover = 0;
 885         cardp->fwseqnum = -1;
 886         cardp->totalbytes = 0;
 887         cardp->fwfinalblk = 0;
 888
 889         /* Send the first firmware packet... */
 890         if_usb_send_fw_pkt(cardp);
 891
 892         /* ... and wait for the process to complete */
 893         wait_event_interruptible(cardp->fw_wq, cardp->surprise_removed || cardp->fwdnldover);
 894
 895         del_timer_sync(&cardp->fw_timeout);
 896         usb_kill_urb(cardp->rx_urb);
 897
 898         if (!cardp->fwdnldover) {
 899                 pr_info("failed to load fw, resetting device!\n");
 900                 if (--reset_count >= 0) {
 901                         if_usb_reset_device(cardp);
 902                         goto restart;
 903                 }
 904
 905                 pr_info("FW download failure, time = %d ms\n", i * 100);
 906                 ret = -EIO;
 907                 goto done;
 908         }
 909
 910         cardp->priv->fw_ready = 1;
 911         if_usb_submit_rx_urb(cardp);
 912
 913         if (lbs_start_card(priv))
 914                 goto done;
 915
 916         if_usb_setup_firmware(priv);
 917
 918         /*
 919          * EHS_REMOVE_WAKEUP is not supported on all versions of the firmware.
 920          */
 921         priv->wol_criteria = EHS_REMOVE_WAKEUP;
 922         if (lbs_host_sleep_cfg(priv, priv->wol_criteria, NULL))
 923                 priv->ehs_remove_supported = false;
 924
 925  done:
 926         cardp->fw = NULL;
 927 }
 928
 929
 930 #ifdef CONFIG_PM
 931 static int if_usb_suspend(struct usb_interface *intf, pm_message_t message)
 932 {
 933         struct if_usb_card *cardp = usb_get_intfdata(intf);
 934         struct lbs_private *priv = cardp->priv;
 935         int ret;
 936
 937         if (priv->psstate != PS_STATE_FULL_POWER) {
 938                 ret = -1;
 939                 goto out;
 940         }
 941
 942 #ifdef CONFIG_OLPC
 943         if (machine_is_olpc()) {
 944                 if (priv->wol_criteria == EHS_REMOVE_WAKEUP)
 945                         olpc_ec_wakeup_clear(EC_SCI_SRC_WLAN);
 946                 else
 947                         olpc_ec_wakeup_set(EC_SCI_SRC_WLAN);
 948         }
 949 #endif
 950
 951         ret = lbs_suspend(priv);
 952         if (ret)
 953                 goto out;
 954
 955         /* Unlink tx & rx urb */
 956         usb_kill_urb(cardp->tx_urb);
 957         usb_kill_urb(cardp->rx_urb);
 958
 959  out:
 960         return ret;
 961 }
 962
 963 static int if_usb_resume(struct usb_interface *intf)
 964 {
 965         struct if_usb_card *cardp = usb_get_intfdata(intf);
 966         struct lbs_private *priv = cardp->priv;
 967
 968         if_usb_submit_rx_urb(cardp);
 969
 970         lbs_resume(priv);
 971
 972         return 0;
 973 }
 974 #else
 975 #define if_usb_suspend NULL
 976 #define if_usb_resume NULL
 977 #endif
 978
 979 static struct usb_driver if_usb_driver = {
 980         .name = DRV_NAME,
 981         .probe = if_usb_probe,
 982         .disconnect = if_usb_disconnect,
 983         .id_table = if_usb_table,
 984         .suspend = if_usb_suspend,
 985         .resume = if_usb_resume,
 986         .reset_resume = if_usb_resume,
 987         .disable_hub_initiated_lpm = 1,
 988 };
 989
 990 module_usb_driver(if_usb_driver);
 991
 992 MODULE_DESCRIPTION("8388 USB WLAN Driver");
 993 MODULE_AUTHOR("Marvell International Ltd. and Red Hat, Inc.");
 994 MODULE_LICENSE("GPL");