usb.c

   1// SPDX-License-Identifier: ISC
   2/*
   3 * Copyright (c) 2011 Broadcom Corporation
   4 */
   5
   6#include <linux/kernel.h>
   7#include <linux/module.h>
   8#include <linux/firmware.h>
   9#include <linux/usb.h>
  10#include <linux/vmalloc.h>
  11
  12#include <brcmu_utils.h>
  13#include <brcm_hw_ids.h>
  14#include <brcmu_wifi.h>
  15#include "bus.h"
  16#include "debug.h"
  17#include "firmware.h"
  18#include "usb.h"
  19#include "core.h"
  20#include "common.h"
  21#include "bcdc.h"
  22
  23
  24#define IOCTL_RESP_TIMEOUT		msecs_to_jiffies(2000)
  25
  26#define BRCMF_USB_RESET_GETVER_SPINWAIT	100	/* in unit of ms */
  27#define BRCMF_USB_RESET_GETVER_LOOP_CNT	10
  28
  29#define BRCMF_POSTBOOT_ID		0xA123  /* ID to detect if dongle
  30						   has boot up */
  31#define BRCMF_USB_NRXQ			50
  32#define BRCMF_USB_NTXQ			50
  33
  34#define BRCMF_USB_CBCTL_WRITE		0
  35#define BRCMF_USB_CBCTL_READ		1
  36#define BRCMF_USB_MAX_PKT_SIZE		1600
  37
  38BRCMF_FW_DEF(43143, "brcmfmac43143");
  39BRCMF_FW_DEF(43236B, "brcmfmac43236b");
  40BRCMF_FW_DEF(43242A, "brcmfmac43242a");
  41BRCMF_FW_DEF(43569, "brcmfmac43569");
  42BRCMF_FW_DEF(4373, "brcmfmac4373");
  43
  44static const struct brcmf_firmware_mapping brcmf_usb_fwnames[] = {
  45	BRCMF_FW_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143),
  46	BRCMF_FW_ENTRY(BRCM_CC_43235_CHIP_ID, 0x00000008, 43236B),
  47	BRCMF_FW_ENTRY(BRCM_CC_43236_CHIP_ID, 0x00000008, 43236B),
  48	BRCMF_FW_ENTRY(BRCM_CC_43238_CHIP_ID, 0x00000008, 43236B),
  49	BRCMF_FW_ENTRY(BRCM_CC_43242_CHIP_ID, 0xFFFFFFFF, 43242A),
  50	BRCMF_FW_ENTRY(BRCM_CC_43566_CHIP_ID, 0xFFFFFFFF, 43569),
  51	BRCMF_FW_ENTRY(BRCM_CC_43569_CHIP_ID, 0xFFFFFFFF, 43569),
  52	BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373)
  53};
  54
  55#define TRX_MAGIC		0x30524448	/* "HDR0" */
  56#define TRX_MAX_OFFSET		3		/* Max number of file offsets */
  57#define TRX_UNCOMP_IMAGE	0x20		/* Trx holds uncompressed img */
  58#define TRX_RDL_CHUNK		1500		/* size of each dl transfer */
  59#define TRX_OFFSETS_DLFWLEN_IDX	0
  60
  61/* Control messages: bRequest values */
  62#define DL_GETSTATE	0	/* returns the rdl_state_t struct */
  63#define DL_CHECK_CRC	1	/* currently unused */
  64#define DL_GO		2	/* execute downloaded image */
  65#define DL_START	3	/* initialize dl state */
  66#define DL_REBOOT	4	/* reboot the device in 2 seconds */
  67#define DL_GETVER	5	/* returns the bootrom_id_t struct */
  68#define DL_GO_PROTECTED	6	/* execute the downloaded code and set reset
  69				 * event to occur in 2 seconds.  It is the
  70				 * responsibility of the downloaded code to
  71				 * clear this event
  72				 */
  73#define DL_EXEC		7	/* jump to a supplied address */
  74#define DL_RESETCFG	8	/* To support single enum on dongle
  75				 * - Not used by bootloader
  76				 */
  77#define DL_DEFER_RESP_OK 9	/* Potentially defer the response to setup
  78				 * if resp unavailable
  79				 */
  80
  81/* states */
  82#define DL_WAITING	0	/* waiting to rx first pkt */
  83#define DL_READY	1	/* hdr was good, waiting for more of the
  84				 * compressed image
  85				 */
  86#define DL_BAD_HDR	2	/* hdr was corrupted */
  87#define DL_BAD_CRC	3	/* compressed image was corrupted */
  88#define DL_RUNNABLE	4	/* download was successful,waiting for go cmd */
  89#define DL_START_FAIL	5	/* failed to initialize correctly */
  90#define DL_NVRAM_TOOBIG	6	/* host specified nvram data exceeds DL_NVRAM
  91				 * value
  92				 */
  93#define DL_IMAGE_TOOBIG	7	/* firmware image too big */
  94
  95
  96struct trx_header_le {
  97	__le32 magic;		/* "HDR0" */
  98	__le32 len;		/* Length of file including header */
  99	__le32 crc32;		/* CRC from flag_version to end of file */
 100	__le32 flag_version;	/* 0:15 flags, 16:31 version */
 101	__le32 offsets[TRX_MAX_OFFSET];	/* Offsets of partitions from start of
 102					 * header
 103					 */
 104};
 105
 106struct rdl_state_le {
 107	__le32 state;
 108	__le32 bytes;
 109};
 110
 111struct bootrom_id_le {
 112	__le32 chip;		/* Chip id */
 113	__le32 chiprev;		/* Chip rev */
 114	__le32 ramsize;		/* Size of  RAM */
 115	__le32 remapbase;	/* Current remap base address */
 116	__le32 boardtype;	/* Type of board */
 117	__le32 boardrev;	/* Board revision */
 118};
 119
 120struct brcmf_usbdev_info {
 121	struct brcmf_usbdev bus_pub; /* MUST BE FIRST */
 122	spinlock_t qlock;
 123	struct list_head rx_freeq;
 124	struct list_head rx_postq;
 125	struct list_head tx_freeq;
 126	struct list_head tx_postq;
 127	uint rx_pipe, tx_pipe;
 128
 129	int rx_low_watermark;
 130	int tx_low_watermark;
 131	int tx_high_watermark;
 132	int tx_freecount;
 133	bool tx_flowblock;
 134	spinlock_t tx_flowblock_lock;
 135
 136	struct brcmf_usbreq *tx_reqs;
 137	struct brcmf_usbreq *rx_reqs;
 138
 139	char fw_name[BRCMF_FW_NAME_LEN];
 140	const u8 *image;	/* buffer for combine fw and nvram */
 141	int image_len;
 142
 143	struct usb_device *usbdev;
 144	struct device *dev;
 145	struct completion dev_init_done;
 146
 147	int ctl_in_pipe, ctl_out_pipe;
 148	struct urb *ctl_urb; /* URB for control endpoint */
 149	struct usb_ctrlrequest ctl_write;
 150	struct usb_ctrlrequest ctl_read;
 151	u32 ctl_urb_actual_length;
 152	int ctl_urb_status;
 153	int ctl_completed;
 154	wait_queue_head_t ioctl_resp_wait;
 155	ulong ctl_op;
 156	u8 ifnum;
 157
 158	struct urb *bulk_urb; /* used for FW download */
 159
 160	struct brcmf_mp_device *settings;
 161};
 162
 163static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 164				struct brcmf_usbreq  *req);
 165
 166static struct brcmf_usbdev *brcmf_usb_get_buspub(struct device *dev)
 167{
 168	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 169	return bus_if->bus_priv.usb;
 170}
 171
 172static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev)
 173{
 174	return brcmf_usb_get_buspub(dev)->devinfo;
 175}
 176
 177static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo)
 178{
 179	return wait_event_timeout(devinfo->ioctl_resp_wait,
 180				  devinfo->ctl_completed, IOCTL_RESP_TIMEOUT);
 181}
 182
 183static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo)
 184{
 185	wake_up(&devinfo->ioctl_resp_wait);
 186}
 187
 188static void
 189brcmf_usb_ctl_complete(struct brcmf_usbdev_info *devinfo, int type, int status)
 190{
 191	brcmf_dbg(USB, "Enter, status=%d\n", status);
 192
 193	if (unlikely(devinfo == NULL))
 194		return;
 195
 196	if (type == BRCMF_USB_CBCTL_READ) {
 197		if (status == 0)
 198			devinfo->bus_pub.stats.rx_ctlpkts++;
 199		else
 200			devinfo->bus_pub.stats.rx_ctlerrs++;
 201	} else if (type == BRCMF_USB_CBCTL_WRITE) {
 202		if (status == 0)
 203			devinfo->bus_pub.stats.tx_ctlpkts++;
 204		else
 205			devinfo->bus_pub.stats.tx_ctlerrs++;
 206	}
 207
 208	devinfo->ctl_urb_status = status;
 209	devinfo->ctl_completed = true;
 210	brcmf_usb_ioctl_resp_wake(devinfo);
 211}
 212
 213static void
 214brcmf_usb_ctlread_complete(struct urb *urb)
 215{
 216	struct brcmf_usbdev_info *devinfo =
 217		(struct brcmf_usbdev_info *)urb->context;
 218
 219	brcmf_dbg(USB, "Enter\n");
 220	devinfo->ctl_urb_actual_length = urb->actual_length;
 221	brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_READ,
 222		urb->status);
 223}
 224
 225static void
 226brcmf_usb_ctlwrite_complete(struct urb *urb)
 227{
 228	struct brcmf_usbdev_info *devinfo =
 229		(struct brcmf_usbdev_info *)urb->context;
 230
 231	brcmf_dbg(USB, "Enter\n");
 232	brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_WRITE,
 233		urb->status);
 234}
 235
 236static int
 237brcmf_usb_send_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 238{
 239	int ret;
 240	u16 size;
 241
 242	brcmf_dbg(USB, "Enter\n");
 243	if (devinfo == NULL || buf == NULL ||
 244	    len == 0 || devinfo->ctl_urb == NULL)
 245		return -EINVAL;
 246
 247	size = len;
 248	devinfo->ctl_write.wLength = cpu_to_le16p(&size);
 249	devinfo->ctl_urb->transfer_buffer_length = size;
 250	devinfo->ctl_urb_status = 0;
 251	devinfo->ctl_urb_actual_length = 0;
 252
 253	usb_fill_control_urb(devinfo->ctl_urb,
 254		devinfo->usbdev,
 255		devinfo->ctl_out_pipe,
 256		(unsigned char *) &devinfo->ctl_write,
 257		buf, size,
 258		(usb_complete_t)brcmf_usb_ctlwrite_complete,
 259		devinfo);
 260
 261	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 262	if (ret < 0)
 263		brcmf_err("usb_submit_urb failed %d\n", ret);
 264
 265	return ret;
 266}
 267
 268static int
 269brcmf_usb_recv_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 270{
 271	int ret;
 272	u16 size;
 273
 274	brcmf_dbg(USB, "Enter\n");
 275	if ((devinfo == NULL) || (buf == NULL) || (len == 0)
 276		|| (devinfo->ctl_urb == NULL))
 277		return -EINVAL;
 278
 279	size = len;
 280	devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 281	devinfo->ctl_urb->transfer_buffer_length = size;
 282
 283	devinfo->ctl_read.bRequestType = USB_DIR_IN
 284		| USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 285	devinfo->ctl_read.bRequest = 1;
 286
 287	usb_fill_control_urb(devinfo->ctl_urb,
 288		devinfo->usbdev,
 289		devinfo->ctl_in_pipe,
 290		(unsigned char *) &devinfo->ctl_read,
 291		buf, size,
 292		(usb_complete_t)brcmf_usb_ctlread_complete,
 293		devinfo);
 294
 295	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 296	if (ret < 0)
 297		brcmf_err("usb_submit_urb failed %d\n", ret);
 298
 299	return ret;
 300}
 301
 302static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 303{
 304	int err = 0;
 305	int timeout = 0;
 306	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 307	struct usb_interface *intf = to_usb_interface(dev);
 308
 309	brcmf_dbg(USB, "Enter\n");
 310
 311	err = usb_autopm_get_interface(intf);
 312	if (err)
 313		goto out;
 314
 315	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 316		err = -EIO;
 317		goto fail;
 318	}
 319
 320	if (test_and_set_bit(0, &devinfo->ctl_op)) {
 321		err = -EIO;
 322		goto fail;
 323	}
 324
 325	devinfo->ctl_completed = false;
 326	err = brcmf_usb_send_ctl(devinfo, buf, len);
 327	if (err) {
 328		brcmf_err("fail %d bytes: %d\n", err, len);
 329		clear_bit(0, &devinfo->ctl_op);
 330		goto fail;
 331	}
 332	timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 333	if (!timeout) {
 334		brcmf_err("Txctl wait timed out\n");
 335		usb_kill_urb(devinfo->ctl_urb);
 336		err = -EIO;
 337		goto fail;
 338	}
 339	clear_bit(0, &devinfo->ctl_op);
 340
 341fail:
 342	usb_autopm_put_interface(intf);
 343out:
 344	return err;
 345}
 346
 347static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 348{
 349	int err = 0;
 350	int timeout = 0;
 351	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 352	struct usb_interface *intf = to_usb_interface(dev);
 353
 354	brcmf_dbg(USB, "Enter\n");
 355
 356	err = usb_autopm_get_interface(intf);
 357	if (err)
 358		goto out;
 359
 360	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 361		err = -EIO;
 362		goto fail;
 363	}
 364
 365	if (test_and_set_bit(0, &devinfo->ctl_op)) {
 366		err = -EIO;
 367		goto fail;
 368	}
 369
 370	devinfo->ctl_completed = false;
 371	err = brcmf_usb_recv_ctl(devinfo, buf, len);
 372	if (err) {
 373		brcmf_err("fail %d bytes: %d\n", err, len);
 374		clear_bit(0, &devinfo->ctl_op);
 375		goto fail;
 376	}
 377	timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 378	err = devinfo->ctl_urb_status;
 379	if (!timeout) {
 380		brcmf_err("rxctl wait timed out\n");
 381		usb_kill_urb(devinfo->ctl_urb);
 382		err = -EIO;
 383		goto fail;
 384	}
 385	clear_bit(0, &devinfo->ctl_op);
 386fail:
 387	usb_autopm_put_interface(intf);
 388	if (!err)
 389		return devinfo->ctl_urb_actual_length;
 390out:
 391	return err;
 392}
 393
 394static struct brcmf_usbreq *brcmf_usb_deq(struct brcmf_usbdev_info *devinfo,
 395					  struct list_head *q, int *counter)
 396{
 397	unsigned long flags;
 398	struct brcmf_usbreq  *req;
 399	spin_lock_irqsave(&devinfo->qlock, flags);
 400	if (list_empty(q)) {
 401		spin_unlock_irqrestore(&devinfo->qlock, flags);
 402		return NULL;
 403	}
 404	req = list_entry(q->next, struct brcmf_usbreq, list);
 405	list_del_init(q->next);
 406	if (counter)
 407		(*counter)--;
 408	spin_unlock_irqrestore(&devinfo->qlock, flags);
 409	return req;
 410
 411}
 412
 413static void brcmf_usb_enq(struct brcmf_usbdev_info *devinfo,
 414			  struct list_head *q, struct brcmf_usbreq *req,
 415			  int *counter)
 416{
 417	unsigned long flags;
 418	spin_lock_irqsave(&devinfo->qlock, flags);
 419	list_add_tail(&req->list, q);
 420	if (counter)
 421		(*counter)++;
 422	spin_unlock_irqrestore(&devinfo->qlock, flags);
 423}
 424
 425static struct brcmf_usbreq *
 426brcmf_usbdev_qinit(struct list_head *q, int qsize)
 427{
 428	int i;
 429	struct brcmf_usbreq *req, *reqs;
 430
 431	reqs = kcalloc(qsize, sizeof(struct brcmf_usbreq), GFP_ATOMIC);
 432	if (reqs == NULL)
 433		return NULL;
 434
 435	req = reqs;
 436
 437	for (i = 0; i < qsize; i++) {
 438		req->urb = usb_alloc_urb(0, GFP_ATOMIC);
 439		if (!req->urb)
 440			goto fail;
 441
 442		INIT_LIST_HEAD(&req->list);
 443		list_add_tail(&req->list, q);
 444		req++;
 445	}
 446	return reqs;
 447fail:
 448	brcmf_err("fail!\n");
 449	while (!list_empty(q)) {
 450		req = list_entry(q->next, struct brcmf_usbreq, list);
 451		if (req)
 452			usb_free_urb(req->urb);
 453		list_del(q->next);
 454	}
 455	kfree(reqs);
 456	return NULL;
 457
 458}
 459
 460static void brcmf_usb_free_q(struct list_head *q)
 461{
 462	struct brcmf_usbreq *req, *next;
 463
 464	list_for_each_entry_safe(req, next, q, list) {
 465		if (!req->urb) {
 466			brcmf_err("bad req\n");
 467			break;
 468		}
 469		usb_free_urb(req->urb);
 470		list_del_init(&req->list);
 471	}
 472}
 473
 474static void brcmf_usb_del_fromq(struct brcmf_usbdev_info *devinfo,
 475				struct brcmf_usbreq *req)
 476{
 477	unsigned long flags;
 478
 479	spin_lock_irqsave(&devinfo->qlock, flags);
 480	list_del_init(&req->list);
 481	spin_unlock_irqrestore(&devinfo->qlock, flags);
 482}
 483
 484
 485static void brcmf_usb_tx_complete(struct urb *urb)
 486{
 487	struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context;
 488	struct brcmf_usbdev_info *devinfo = req->devinfo;
 489	unsigned long flags;
 490
 491	brcmf_dbg(USB, "Enter, urb->status=%d, skb=%p\n", urb->status,
 492		  req->skb);
 493	brcmf_usb_del_fromq(devinfo, req);
 494
 495	brcmf_proto_bcdc_txcomplete(devinfo->dev, req->skb, urb->status == 0);
 496	req->skb = NULL;
 497	brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount);
 498	spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
 499	if (devinfo->tx_freecount > devinfo->tx_high_watermark &&
 500		devinfo->tx_flowblock) {
 501		brcmf_proto_bcdc_txflowblock(devinfo->dev, false);
 502		devinfo->tx_flowblock = false;
 503	}
 504	spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
 505}
 506
 507static void brcmf_usb_rx_complete(struct urb *urb)
 508{
 509	struct brcmf_usbreq  *req = (struct brcmf_usbreq *)urb->context;
 510	struct brcmf_usbdev_info *devinfo = req->devinfo;
 511	struct sk_buff *skb;
 512
 513	brcmf_dbg(USB, "Enter, urb->status=%d\n", urb->status);
 514	brcmf_usb_del_fromq(devinfo, req);
 515	skb = req->skb;
 516	req->skb = NULL;
 517
 518	/* zero length packets indicate usb "failure". Do not refill */
 519	if (urb->status != 0 || !urb->actual_length) {
 520		brcmu_pkt_buf_free_skb(skb);
 521		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 522		return;
 523	}
 524
 525	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP ||
 526	    devinfo->bus_pub.state == BRCMFMAC_USB_STATE_SLEEP) {
 527		skb_put(skb, urb->actual_length);
 528		brcmf_rx_frame(devinfo->dev, skb, true, true);
 529		brcmf_usb_rx_refill(devinfo, req);
 530		usb_mark_last_busy(urb->dev);
 531	} else {
 532		brcmu_pkt_buf_free_skb(skb);
 533		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 534	}
 535	return;
 536
 537}
 538
 539static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 540				struct brcmf_usbreq  *req)
 541{
 542	struct sk_buff *skb;
 543	int ret;
 544
 545	if (!req || !devinfo)
 546		return;
 547
 548	skb = dev_alloc_skb(devinfo->bus_pub.bus_mtu);
 549	if (!skb) {
 550		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 551		return;
 552	}
 553	req->skb = skb;
 554
 555	usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->rx_pipe,
 556			  skb->data, skb_tailroom(skb), brcmf_usb_rx_complete,
 557			  req);
 558	req->devinfo = devinfo;
 559	brcmf_usb_enq(devinfo, &devinfo->rx_postq, req, NULL);
 560
 561	ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 562	if (ret) {
 563		brcmf_usb_del_fromq(devinfo, req);
 564		brcmu_pkt_buf_free_skb(req->skb);
 565		req->skb = NULL;
 566		brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 567	}
 568	return;
 569}
 570
 571static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
 572{
 573	struct brcmf_usbreq *req;
 574
 575	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 576		brcmf_err("bus is not up=%d\n", devinfo->bus_pub.state);
 577		return;
 578	}
 579	while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL)
 580		brcmf_usb_rx_refill(devinfo, req);
 581}
 582
 583static void
 584brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state)
 585{
 586	struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus;
 587
 588	brcmf_dbg(USB, "Enter, current state=%d, new state=%d\n",
 589		  devinfo->bus_pub.state, state);
 590
 591	if (devinfo->bus_pub.state == state)
 592		return;
 593
 594	devinfo->bus_pub.state = state;
 595
 596	/* update state of upper layer */
 597	if (state == BRCMFMAC_USB_STATE_DOWN) {
 598		brcmf_dbg(USB, "DBUS is down\n");
 599		brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_DOWN);
 600	} else if (state == BRCMFMAC_USB_STATE_UP) {
 601		brcmf_dbg(USB, "DBUS is up\n");
 602		brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_UP);
 603	} else {
 604		brcmf_dbg(USB, "DBUS current state=%d\n", state);
 605	}
 606}
 607
 608static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
 609{
 610	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 611	struct brcmf_usbreq  *req;
 612	int ret;
 613	unsigned long flags;
 614	struct usb_interface *intf = to_usb_interface(dev);
 615
 616	ret = usb_autopm_get_interface(intf);
 617	if (ret)
 618		goto out;
 619
 620	brcmf_dbg(USB, "Enter, skb=%p\n", skb);
 621	if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 622		ret = -EIO;
 623		goto fail;
 624	}
 625
 626	req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq,
 627					&devinfo->tx_freecount);
 628	if (!req) {
 629		brcmf_err("no req to send\n");
 630		ret = -ENOMEM;
 631		goto fail;
 632	}
 633
 634	req->skb = skb;
 635	req->devinfo = devinfo;
 636	usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
 637			  skb->data, skb->len, brcmf_usb_tx_complete, req);
 638	req->urb->transfer_flags |= URB_ZERO_PACKET;
 639	brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL);
 640	ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 641	if (ret) {
 642		brcmf_err("brcmf_usb_tx usb_submit_urb FAILED\n");
 643		brcmf_usb_del_fromq(devinfo, req);
 644		req->skb = NULL;
 645		brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req,
 646			      &devinfo->tx_freecount);
 647		goto fail;
 648	}
 649
 650	spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
 651	if (devinfo->tx_freecount < devinfo->tx_low_watermark &&
 652	    !devinfo->tx_flowblock) {
 653		brcmf_proto_bcdc_txflowblock(dev, true);
 654		devinfo->tx_flowblock = true;
 655	}
 656	spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
 657
 658fail:
 659	usb_autopm_put_interface(intf);
 660out:
 661	return ret;
 662}
 663
 664
 665static int brcmf_usb_up(struct device *dev)
 666{
 667	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 668
 669	brcmf_dbg(USB, "Enter\n");
 670	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP)
 671		return 0;
 672
 673	/* Success, indicate devinfo is fully up */
 674	brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_UP);
 675
 676	if (devinfo->ctl_urb) {
 677		devinfo->ctl_in_pipe = usb_rcvctrlpipe(devinfo->usbdev, 0);
 678		devinfo->ctl_out_pipe = usb_sndctrlpipe(devinfo->usbdev, 0);
 679
 680		/* CTL Write */
 681		devinfo->ctl_write.bRequestType =
 682			USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 683		devinfo->ctl_write.bRequest = 0;
 684		devinfo->ctl_write.wValue = cpu_to_le16(0);
 685		devinfo->ctl_write.wIndex = cpu_to_le16(devinfo->ifnum);
 686
 687		/* CTL Read */
 688		devinfo->ctl_read.bRequestType =
 689			USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 690		devinfo->ctl_read.bRequest = 1;
 691		devinfo->ctl_read.wValue = cpu_to_le16(0);
 692		devinfo->ctl_read.wIndex = cpu_to_le16(devinfo->ifnum);
 693	}
 694	brcmf_usb_rx_fill_all(devinfo);
 695	return 0;
 696}
 697
 698static void brcmf_cancel_all_urbs(struct brcmf_usbdev_info *devinfo)
 699{
 700	int i;
 701
 702	if (devinfo->ctl_urb)
 703		usb_kill_urb(devinfo->ctl_urb);
 704	if (devinfo->bulk_urb)
 705		usb_kill_urb(devinfo->bulk_urb);
 706	if (devinfo->tx_reqs)
 707		for (i = 0; i < devinfo->bus_pub.ntxq; i++)
 708			usb_kill_urb(devinfo->tx_reqs[i].urb);
 709	if (devinfo->rx_reqs)
 710		for (i = 0; i < devinfo->bus_pub.nrxq; i++)
 711			usb_kill_urb(devinfo->rx_reqs[i].urb);
 712}
 713
 714static void brcmf_usb_down(struct device *dev)
 715{
 716	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 717
 718	brcmf_dbg(USB, "Enter\n");
 719	if (devinfo == NULL)
 720		return;
 721
 722	if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_DOWN)
 723		return;
 724
 725	brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_DOWN);
 726
 727	brcmf_cancel_all_urbs(devinfo);
 728}
 729
 730static void
 731brcmf_usb_sync_complete(struct urb *urb)
 732{
 733	struct brcmf_usbdev_info *devinfo =
 734			(struct brcmf_usbdev_info *)urb->context;
 735
 736	devinfo->ctl_completed = true;
 737	brcmf_usb_ioctl_resp_wake(devinfo);
 738}
 739
 740static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
 741			    void *buffer, int buflen)
 742{
 743	int ret;
 744	char *tmpbuf = NULL;
 745	u16 size;
 746
 747	if (!devinfo || !devinfo->ctl_urb) {
 748		ret = -EINVAL;
 749		goto err;
 750	}
 751
 752	tmpbuf = kmalloc(buflen, GFP_ATOMIC);
 753	if (!tmpbuf) {
 754		ret = -ENOMEM;
 755		goto err;
 756	}
 757
 758	size = buflen;
 759	devinfo->ctl_urb->transfer_buffer_length = size;
 760
 761	devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 762	devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR |
 763		USB_RECIP_INTERFACE;
 764	devinfo->ctl_read.bRequest = cmd;
 765
 766	usb_fill_control_urb(devinfo->ctl_urb,
 767		devinfo->usbdev,
 768		usb_rcvctrlpipe(devinfo->usbdev, 0),
 769		(unsigned char *) &devinfo->ctl_read,
 770		(void *) tmpbuf, size,
 771		(usb_complete_t)brcmf_usb_sync_complete, devinfo);
 772
 773	devinfo->ctl_completed = false;
 774	ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 775	if (ret < 0) {
 776		brcmf_err("usb_submit_urb failed %d\n", ret);
 777		goto err;
 778	}
 779
 780	if (!brcmf_usb_ioctl_resp_wait(devinfo)) {
 781		usb_kill_urb(devinfo->ctl_urb);
 782		ret = -ETIMEDOUT;
 783		goto err;
 784	} else {
 785		memcpy(buffer, tmpbuf, buflen);
 786	}
 787
 788	kfree(tmpbuf);
 789	return 0;
 790
 791err:
 792	kfree(tmpbuf);
 793	brcmf_err("dl cmd %u failed: err=%d\n", cmd, ret);
 794	return ret;
 795}
 796
 797static bool
 798brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo)
 799{
 800	struct bootrom_id_le id;
 801	u32 chipid, chiprev;
 802
 803	brcmf_dbg(USB, "Enter\n");
 804
 805	if (devinfo == NULL)
 806		return false;
 807
 808	/* Check if firmware downloaded already by querying runtime ID */
 809	id.chip = cpu_to_le32(0xDEAD);
 810	brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
 811
 812	chipid = le32_to_cpu(id.chip);
 813	chiprev = le32_to_cpu(id.chiprev);
 814
 815	if ((chipid & 0x4300) == 0x4300)
 816		brcmf_dbg(USB, "chip %x rev 0x%x\n", chipid, chiprev);
 817	else
 818		brcmf_dbg(USB, "chip %d rev 0x%x\n", chipid, chiprev);
 819	if (chipid == BRCMF_POSTBOOT_ID) {
 820		brcmf_dbg(USB, "firmware already downloaded\n");
 821		brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
 822		return false;
 823	} else {
 824		devinfo->bus_pub.devid = chipid;
 825		devinfo->bus_pub.chiprev = chiprev;
 826	}
 827	return true;
 828}
 829
 830static int
 831brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo)
 832{
 833	struct bootrom_id_le id;
 834	u32 loop_cnt;
 835	int err;
 836
 837	brcmf_dbg(USB, "Enter\n");
 838
 839	loop_cnt = 0;
 840	do {
 841		mdelay(BRCMF_USB_RESET_GETVER_SPINWAIT);
 842		loop_cnt++;
 843		id.chip = cpu_to_le32(0xDEAD);       /* Get the ID */
 844		err = brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
 845		if ((err) && (err != -ETIMEDOUT))
 846			return err;
 847		if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID))
 848			break;
 849	} while (loop_cnt < BRCMF_USB_RESET_GETVER_LOOP_CNT);
 850
 851	if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) {
 852		brcmf_dbg(USB, "postboot chip 0x%x/rev 0x%x\n",
 853			  le32_to_cpu(id.chip), le32_to_cpu(id.chiprev));
 854
 855		brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
 856		return 0;
 857	} else {
 858		brcmf_err("Cannot talk to Dongle. Firmware is not UP, %d ms\n",
 859			  BRCMF_USB_RESET_GETVER_SPINWAIT * loop_cnt);
 860		return -EINVAL;
 861	}
 862}
 863
 864
 865static int
 866brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len)
 867{
 868	int ret;
 869
 870	if ((devinfo == NULL) || (devinfo->bulk_urb == NULL))
 871		return -EINVAL;
 872
 873	/* Prepare the URB */
 874	usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev,
 875			  devinfo->tx_pipe, buffer, len,
 876			  (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 877
 878	devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET;
 879
 880	devinfo->ctl_completed = false;
 881	ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC);
 882	if (ret) {
 883		brcmf_err("usb_submit_urb failed %d\n", ret);
 884		return ret;
 885	}
 886	ret = brcmf_usb_ioctl_resp_wait(devinfo);
 887	return (ret == 0);
 888}
 889
 890static int
 891brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen)
 892{
 893	unsigned int sendlen, sent, dllen;
 894	char *bulkchunk = NULL, *dlpos;
 895	struct rdl_state_le state;
 896	u32 rdlstate, rdlbytes;
 897	int err = 0;
 898
 899	brcmf_dbg(USB, "Enter, fw %p, len %d\n", fw, fwlen);
 900
 901	bulkchunk = kmalloc(TRX_RDL_CHUNK, GFP_ATOMIC);
 902	if (bulkchunk == NULL) {
 903		err = -ENOMEM;
 904		goto fail;
 905	}
 906
 907	/* 1) Prepare USB boot loader for runtime image */
 908	err = brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state));
 909	if (err)
 910		goto fail;
 911
 912	rdlstate = le32_to_cpu(state.state);
 913	rdlbytes = le32_to_cpu(state.bytes);
 914
 915	/* 2) Check we are in the Waiting state */
 916	if (rdlstate != DL_WAITING) {
 917		brcmf_err("Invalid DL state: %u\n", rdlstate);
 918		err = -EINVAL;
 919		goto fail;
 920	}
 921	sent = 0;
 922	dlpos = fw;
 923	dllen = fwlen;
 924
 925	/* Get chip id and rev */
 926	while (rdlbytes != dllen) {
 927		/* Wait until the usb device reports it received all
 928		 * the bytes we sent */
 929		if ((rdlbytes == sent) && (rdlbytes != dllen)) {
 930			sendlen = min(dllen - sent, TRX_RDL_CHUNK);
 931
 932			/* simply avoid having to send a ZLP by ensuring we
 933			 * never have an even
 934			 * multiple of 64
 935			 */
 936			if (!(sendlen % 64))
 937				sendlen -= 4;
 938
 939			/* send data */
 940			memcpy(bulkchunk, dlpos, sendlen);
 941			if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk,
 942						   sendlen)) {
 943				brcmf_err("send_bulk failed\n");
 944				err = -EINVAL;
 945				goto fail;
 946			}
 947
 948			dlpos += sendlen;
 949			sent += sendlen;
 950		}
 951		err = brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
 952				       sizeof(state));
 953		if (err) {
 954			brcmf_err("DL_GETSTATE Failed\n");
 955			goto fail;
 956		}
 957
 958		rdlstate = le32_to_cpu(state.state);
 959		rdlbytes = le32_to_cpu(state.bytes);
 960
 961		/* restart if an error is reported */
 962		if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) {
 963			brcmf_err("Bad Hdr or Bad CRC state %d\n",
 964				  rdlstate);
 965			err = -EINVAL;
 966			goto fail;
 967		}
 968	}
 969
 970fail:
 971	kfree(bulkchunk);
 972	brcmf_dbg(USB, "Exit, err=%d\n", err);
 973	return err;
 974}
 975
 976static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len)
 977{
 978	int err;
 979
 980	brcmf_dbg(USB, "Enter\n");
 981
 982	if (devinfo == NULL)
 983		return -EINVAL;
 984
 985	if (devinfo->bus_pub.devid == 0xDEAD)
 986		return -EINVAL;
 987
 988	err = brcmf_usb_dl_writeimage(devinfo, fw, len);
 989	if (err == 0)
 990		devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_DONE;
 991	else
 992		devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_FAIL;
 993	brcmf_dbg(USB, "Exit, err=%d\n", err);
 994
 995	return err;
 996}
 997
 998static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo)
 999{
1000	struct rdl_state_le state;
1001
1002	brcmf_dbg(USB, "Enter\n");
1003	if (!devinfo)
1004		return -EINVAL;
1005
1006	if (devinfo->bus_pub.devid == 0xDEAD)
1007		return -EINVAL;
1008
1009	/* Check we are runnable */
1010	state.state = 0;
1011	brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state));
1012
1013	/* Start the image */
1014	if (state.state == cpu_to_le32(DL_RUNNABLE)) {
1015		if (brcmf_usb_dl_cmd(devinfo, DL_GO, &state, sizeof(state)))
1016			return -ENODEV;
1017		if (brcmf_usb_resetcfg(devinfo))
1018			return -ENODEV;
1019		/* The Dongle may go for re-enumeration. */
1020	} else {
1021		brcmf_err("Dongle not runnable\n");
1022		return -EINVAL;
1023	}
1024	brcmf_dbg(USB, "Exit\n");
1025	return 0;
1026}
1027
1028static int
1029brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo)
1030{
1031	int err;
1032	struct usb_interface *intf;
1033
1034	brcmf_dbg(USB, "Enter\n");
1035	if (!devinfo) {
1036		err = -ENODEV;
1037		goto out;
1038	}
1039
1040	if (!devinfo->image) {
1041		brcmf_err("No firmware!\n");
1042		err = -ENOENT;
1043		goto out;
1044	}
1045
1046	intf = to_usb_interface(devinfo->dev);
1047	err = usb_autopm_get_interface(intf);
1048	if (err)
1049		goto out;
1050
1051	err = brcmf_usb_dlstart(devinfo,
1052		(u8 *)devinfo->image, devinfo->image_len);
1053	if (err == 0)
1054		err = brcmf_usb_dlrun(devinfo);
1055
1056	usb_autopm_put_interface(intf);
1057out:
1058	return err;
1059}
1060
1061
1062static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo)
1063{
1064	brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo);
1065
1066	/* free the URBS */
1067	brcmf_usb_free_q(&devinfo->rx_freeq);
1068	brcmf_usb_free_q(&devinfo->tx_freeq);
1069
1070	usb_free_urb(devinfo->ctl_urb);
1071	usb_free_urb(devinfo->bulk_urb);
1072
1073	kfree(devinfo->tx_reqs);
1074	kfree(devinfo->rx_reqs);
1075
1076	if (devinfo->settings)
1077		brcmf_release_module_param(devinfo->settings);
1078}
1079
1080
1081static int check_file(const u8 *headers)
1082{
1083	struct trx_header_le *trx;
1084	int actual_len = -1;
1085
1086	brcmf_dbg(USB, "Enter\n");
1087	/* Extract trx header */
1088	trx = (struct trx_header_le *) headers;
1089	if (trx->magic != cpu_to_le32(TRX_MAGIC))
1090		return -1;
1091
1092	headers += sizeof(struct trx_header_le);
1093
1094	if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) {
1095		actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]);
1096		return actual_len + sizeof(struct trx_header_le);
1097	}
1098	return -1;
1099}
1100
1101
1102static
1103struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo,
1104				      int nrxq, int ntxq)
1105{
1106	brcmf_dbg(USB, "Enter\n");
1107
1108	devinfo->bus_pub.nrxq = nrxq;
1109	devinfo->rx_low_watermark = nrxq / 2;
1110	devinfo->bus_pub.devinfo = devinfo;
1111	devinfo->bus_pub.ntxq = ntxq;
1112	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DOWN;
1113
1114	/* flow control when too many tx urbs posted */
1115	devinfo->tx_low_watermark = ntxq / 4;
1116	devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3;
1117	devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE;
1118
1119	/* Initialize other structure content */
1120	init_waitqueue_head(&devinfo->ioctl_resp_wait);
1121
1122	/* Initialize the spinlocks */
1123	spin_lock_init(&devinfo->qlock);
1124	spin_lock_init(&devinfo->tx_flowblock_lock);
1125
1126	INIT_LIST_HEAD(&devinfo->rx_freeq);
1127	INIT_LIST_HEAD(&devinfo->rx_postq);
1128
1129	INIT_LIST_HEAD(&devinfo->tx_freeq);
1130	INIT_LIST_HEAD(&devinfo->tx_postq);
1131
1132	devinfo->tx_flowblock = false;
1133
1134	devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq);
1135	if (!devinfo->rx_reqs)
1136		goto error;
1137
1138	devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq);
1139	if (!devinfo->tx_reqs)
1140		goto error;
1141	devinfo->tx_freecount = ntxq;
1142
1143	devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC);
1144	if (!devinfo->ctl_urb)
1145		goto error;
1146	devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC);
1147	if (!devinfo->bulk_urb)
1148		goto error;
1149
1150	return &devinfo->bus_pub;
1151
1152error:
1153	brcmf_err("failed!\n");
1154	brcmf_usb_detach(devinfo);
1155	return NULL;
1156}
1157
1158static int brcmf_usb_get_blob(struct device *dev, const struct firmware **fw,
1159			      enum brcmf_blob_type type)
1160{
1161	/* No blobs for USB devices... */
1162	return -ENOENT;
1163}
1164
1165static const struct brcmf_bus_ops brcmf_usb_bus_ops = {
1166	.preinit = brcmf_usb_up,
1167	.stop = brcmf_usb_down,
1168	.txdata = brcmf_usb_tx,
1169	.txctl = brcmf_usb_tx_ctlpkt,
1170	.rxctl = brcmf_usb_rx_ctlpkt,
1171	.get_blob = brcmf_usb_get_blob,
1172};
1173
1174#define BRCMF_USB_FW_CODE	0
1175
1176static void brcmf_usb_probe_phase2(struct device *dev, int ret,
1177				   struct brcmf_fw_request *fwreq)
1178{
1179	struct brcmf_bus *bus = dev_get_drvdata(dev);
1180	struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo;
1181	const struct firmware *fw;
1182
1183	if (ret)
1184		goto error;
1185
1186	brcmf_dbg(USB, "Start fw downloading\n");
1187
1188	fw = fwreq->items[BRCMF_USB_FW_CODE].binary;
1189	kfree(fwreq);
1190
1191	ret = check_file(fw->data);
1192	if (ret < 0) {
1193		brcmf_err("invalid firmware\n");
1194		release_firmware(fw);
1195		goto error;
1196	}
1197
1198	devinfo->image = fw->data;
1199	devinfo->image_len = fw->size;
1200
1201	ret = brcmf_usb_fw_download(devinfo);
1202	release_firmware(fw);
1203	if (ret)
1204		goto error;
1205
1206	ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1207	if (ret)
1208		goto error;
1209
1210	/* Attach to the common driver interface */
1211	ret = brcmf_attach(devinfo->dev);
1212	if (ret)
1213		goto error;
1214
1215	complete(&devinfo->dev_init_done);
1216	return;
1217error:
1218	brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
1219	complete(&devinfo->dev_init_done);
1220	device_release_driver(dev);
1221}
1222
1223static struct brcmf_fw_request *
1224brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info *devinfo)
1225{
1226	struct brcmf_fw_request *fwreq;
1227	struct brcmf_fw_name fwnames[] = {
1228		{ ".bin", devinfo->fw_name },
1229	};
1230
1231	fwreq = brcmf_fw_alloc_request(devinfo->bus_pub.devid,
1232				       devinfo->bus_pub.chiprev,
1233				       brcmf_usb_fwnames,
1234				       ARRAY_SIZE(brcmf_usb_fwnames),
1235				       fwnames, ARRAY_SIZE(fwnames));
1236	if (!fwreq)
1237		return NULL;
1238
1239	fwreq->items[BRCMF_USB_FW_CODE].type = BRCMF_FW_TYPE_BINARY;
1240
1241	return fwreq;
1242}
1243
1244static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo,
1245			      enum brcmf_fwvendor fwvid)
1246{
1247	struct brcmf_bus *bus;
1248	struct brcmf_usbdev *bus_pub;
1249	struct device *dev = devinfo->dev;
1250	struct brcmf_fw_request *fwreq;
1251	int ret;
1252
1253	brcmf_dbg(USB, "Enter\n");
1254	bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ);
1255	if (!bus_pub)
1256		return -ENODEV;
1257
1258	bus = kzalloc(sizeof(*bus), GFP_ATOMIC);
1259	if (!bus) {
1260		ret = -ENOMEM;
1261		goto fail;
1262	}
1263
1264	bus->dev = dev;
1265	bus_pub->bus = bus;
1266	bus->bus_priv.usb = bus_pub;
1267	dev_set_drvdata(dev, bus);
1268	bus->ops = &brcmf_usb_bus_ops;
1269	bus->proto_type = BRCMF_PROTO_BCDC;
1270	bus->fwvid = fwvid;
1271	bus->always_use_fws_queue = true;
1272#ifdef CONFIG_PM
1273	bus->wowl_supported = true;
1274#endif
1275
1276	devinfo->settings = brcmf_get_module_param(bus->dev, BRCMF_BUSTYPE_USB,
1277						   bus_pub->devid,
1278						   bus_pub->chiprev);
1279	if (!devinfo->settings) {
1280		ret = -ENOMEM;
1281		goto fail;
1282	}
1283	ret = PTR_ERR_OR_ZERO(devinfo->settings);
1284	if (ret < 0)
1285		goto fail;
1286
1287	if (!brcmf_usb_dlneeded(devinfo)) {
1288		ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1289		if (ret)
1290			goto fail;
1291		ret = brcmf_attach(devinfo->dev);
1292		if (ret)
1293			goto fail;
1294		/* we are done */
1295		complete(&devinfo->dev_init_done);
1296		return 0;
1297	}
1298	bus->chip = bus_pub->devid;
1299	bus->chiprev = bus_pub->chiprev;
1300
1301	fwreq = brcmf_usb_prepare_fw_request(devinfo);
1302	if (!fwreq) {
1303		ret = -ENOMEM;
1304		goto fail;
1305	}
1306
1307	/* request firmware here */
1308	ret = brcmf_fw_get_firmwares(dev, fwreq, brcmf_usb_probe_phase2);
1309	if (ret) {
1310		brcmf_err("firmware request failed: %d\n", ret);
1311		kfree(fwreq);
1312		goto fail;
1313	}
1314
1315	return 0;
1316
1317fail:
1318	/* Release resources in reverse order */
1319	brcmf_free(devinfo->dev);
1320	kfree(bus);
1321	brcmf_usb_detach(devinfo);
1322	return ret;
1323}
1324
1325static void
1326brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
1327{
1328	if (!devinfo)
1329		return;
1330	brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
1331
1332	brcmf_detach(devinfo->dev);
1333	brcmf_free(devinfo->dev);
1334	kfree(devinfo->bus_pub.bus);
1335	brcmf_usb_detach(devinfo);
1336}
1337
1338/* Forward declaration for usb_match_id() call */
1339static const struct usb_device_id brcmf_usb_devid_table[];
1340
1341static int
1342brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1343{
1344	struct usb_device *usb = interface_to_usbdev(intf);
1345	struct brcmf_usbdev_info *devinfo;
1346	struct usb_interface_descriptor	*desc;
1347	struct usb_endpoint_descriptor *endpoint;
1348	int ret = 0;
1349	u32 num_of_eps;
1350	u8 endpoint_num, ep;
1351
1352	if (!id) {
1353		id = usb_match_id(intf, brcmf_usb_devid_table);
1354		if (!id) {
1355			dev_err(&intf->dev, "Error could not find matching usb_device_id\n");
1356			return -ENODEV;
1357		}
1358	}
1359
1360	brcmf_dbg(USB, "Enter 0x%04x:0x%04x\n", id->idVendor, id->idProduct);
1361
1362	devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC);
1363	if (devinfo == NULL)
1364		return -ENOMEM;
1365
1366	devinfo->usbdev = usb;
1367	devinfo->dev = &usb->dev;
1368	/* Init completion, to protect for disconnect while still loading.
1369	 * Necessary because of the asynchronous firmware load construction
1370	 */
1371	init_completion(&devinfo->dev_init_done);
1372
1373	usb_set_intfdata(intf, devinfo);
1374
1375	intf->needs_remote_wakeup = 1;
1376
1377	/* Check that the device supports only one configuration */
1378	if (usb->descriptor.bNumConfigurations != 1) {
1379		brcmf_err("Number of configurations: %d not supported\n",
1380			  usb->descriptor.bNumConfigurations);
1381		ret = -ENODEV;
1382		goto fail;
1383	}
1384
1385	if ((usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) &&
1386	    (usb->descriptor.bDeviceClass != USB_CLASS_MISC) &&
1387	    (usb->descriptor.bDeviceClass != USB_CLASS_WIRELESS_CONTROLLER)) {
1388		brcmf_err("Device class: 0x%x not supported\n",
1389			  usb->descriptor.bDeviceClass);
1390		ret = -ENODEV;
1391		goto fail;
1392	}
1393
1394	desc = &intf->cur_altsetting->desc;
1395	if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
1396	    (desc->bInterfaceSubClass != 2) ||
1397	    (desc->bInterfaceProtocol != 0xff)) {
1398		brcmf_err("non WLAN interface %d: 0x%x:0x%x:0x%x\n",
1399			  desc->bInterfaceNumber, desc->bInterfaceClass,
1400			  desc->bInterfaceSubClass, desc->bInterfaceProtocol);
1401		ret = -ENODEV;
1402		goto fail;
1403	}
1404
1405	num_of_eps = desc->bNumEndpoints;
1406	for (ep = 0; ep < num_of_eps; ep++) {
1407		endpoint = &intf->cur_altsetting->endpoint[ep].desc;
1408		endpoint_num = usb_endpoint_num(endpoint);
1409		if (!usb_endpoint_xfer_bulk(endpoint))
1410			continue;
1411		if (usb_endpoint_dir_in(endpoint)) {
1412			if (!devinfo->rx_pipe)
1413				devinfo->rx_pipe =
1414					usb_rcvbulkpipe(usb, endpoint_num);
1415		} else {
1416			if (!devinfo->tx_pipe)
1417				devinfo->tx_pipe =
1418					usb_sndbulkpipe(usb, endpoint_num);
1419		}
1420	}
1421	if (devinfo->rx_pipe == 0) {
1422		brcmf_err("No RX (in) Bulk EP found\n");
1423		ret = -ENODEV;
1424		goto fail;
1425	}
1426	if (devinfo->tx_pipe == 0) {
1427		brcmf_err("No TX (out) Bulk EP found\n");
1428		ret = -ENODEV;
1429		goto fail;
1430	}
1431
1432	devinfo->ifnum = desc->bInterfaceNumber;
1433
1434	if (usb->speed == USB_SPEED_SUPER_PLUS)
1435		brcmf_dbg(USB, "Broadcom super speed plus USB WLAN interface detected\n");
1436	else if (usb->speed == USB_SPEED_SUPER)
1437		brcmf_dbg(USB, "Broadcom super speed USB WLAN interface detected\n");
1438	else if (usb->speed == USB_SPEED_HIGH)
1439		brcmf_dbg(USB, "Broadcom high speed USB WLAN interface detected\n");
1440	else
1441		brcmf_dbg(USB, "Broadcom full speed USB WLAN interface detected\n");
1442
1443	ret = brcmf_usb_probe_cb(devinfo, id->driver_info);
1444	if (ret)
1445		goto fail;
1446
1447	/* Success */
1448	return 0;
1449
1450fail:
1451	complete(&devinfo->dev_init_done);
1452	kfree(devinfo);
1453	usb_set_intfdata(intf, NULL);
1454	return ret;
1455}
1456
1457static void
1458brcmf_usb_disconnect(struct usb_interface *intf)
1459{
1460	struct brcmf_usbdev_info *devinfo;
1461
1462	brcmf_dbg(USB, "Enter\n");
1463	devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf);
1464
1465	if (devinfo) {
1466		wait_for_completion(&devinfo->dev_init_done);
1467		/* Make sure that devinfo still exists. Firmware probe routines
1468		 * may have released the device and cleared the intfdata.
1469		 */
1470		if (!usb_get_intfdata(intf))
1471			goto done;
1472
1473		brcmf_usb_disconnect_cb(devinfo);
1474		kfree(devinfo);
1475	}
1476done:
1477	brcmf_dbg(USB, "Exit\n");
1478}
1479
1480/*
1481 * only need to signal the bus being down and update the state.
1482 */
1483static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
1484{
1485	struct usb_device *usb = interface_to_usbdev(intf);
1486	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1487
1488	brcmf_dbg(USB, "Enter\n");
1489	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
1490	brcmf_cancel_all_urbs(devinfo);
1491	device_set_wakeup_enable(devinfo->dev, true);
1492	return 0;
1493}
1494
1495/*
1496 * (re-) start the bus.
1497 */
1498static int brcmf_usb_resume(struct usb_interface *intf)
1499{
1500	struct usb_device *usb = interface_to_usbdev(intf);
1501	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1502
1503	brcmf_dbg(USB, "Enter\n");
1504
1505	devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
1506	brcmf_usb_rx_fill_all(devinfo);
1507	device_set_wakeup_enable(devinfo->dev, false);
1508	return 0;
1509}
1510
1511static int brcmf_usb_reset_resume(struct usb_interface *intf)
1512{
1513	struct usb_device *usb = interface_to_usbdev(intf);
1514	struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1515	struct brcmf_fw_request *fwreq;
1516	int ret;
1517
1518	brcmf_dbg(USB, "Enter\n");
1519
1520	fwreq = brcmf_usb_prepare_fw_request(devinfo);
1521	if (!fwreq)
1522		return -ENOMEM;
1523
1524	ret = brcmf_fw_get_firmwares(&usb->dev, fwreq, brcmf_usb_probe_phase2);
1525	if (ret < 0)
1526		kfree(fwreq);
1527
1528	return ret;
1529}
1530
1531#define BRCMF_USB_DEVICE(dev_id) \
1532	{ \
1533		USB_DEVICE(BRCM_USB_VENDOR_ID_BROADCOM, dev_id), \
1534		.driver_info = BRCMF_FWVENDOR_WCC \
1535	}
1536
1537#define LINKSYS_USB_DEVICE(dev_id) \
1538	{ \
1539		USB_DEVICE(BRCM_USB_VENDOR_ID_LINKSYS, dev_id), \
1540		.driver_info = BRCMF_FWVENDOR_WCC \
1541	}
1542
1543#define CYPRESS_USB_DEVICE(dev_id) \
1544	{ \
1545		USB_DEVICE(CY_USB_VENDOR_ID_CYPRESS, dev_id), \
1546		.driver_info = BRCMF_FWVENDOR_WCC \
1547	}
1548
1549static const struct usb_device_id brcmf_usb_devid_table[] = {
1550	BRCMF_USB_DEVICE(BRCM_USB_43143_DEVICE_ID),
1551	BRCMF_USB_DEVICE(BRCM_USB_43236_DEVICE_ID),
1552	BRCMF_USB_DEVICE(BRCM_USB_43242_DEVICE_ID),
1553	BRCMF_USB_DEVICE(BRCM_USB_43569_DEVICE_ID),
1554	LINKSYS_USB_DEVICE(BRCM_USB_43235_LINKSYS_DEVICE_ID),
1555	CYPRESS_USB_DEVICE(CY_USB_4373_DEVICE_ID),
1556	{ USB_DEVICE(BRCM_USB_VENDOR_ID_LG, BRCM_USB_43242_LG_DEVICE_ID) },
1557	/* special entry for device with firmware loaded and running */
1558	BRCMF_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1559	CYPRESS_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1560	{ /* end: all zeroes */ }
1561};
1562
1563MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table);
1564
1565static struct usb_driver brcmf_usbdrvr = {
1566	.name = KBUILD_MODNAME,
1567	.probe = brcmf_usb_probe,
1568	.disconnect = brcmf_usb_disconnect,
1569	.id_table = brcmf_usb_devid_table,
1570	.suspend = brcmf_usb_suspend,
1571	.resume = brcmf_usb_resume,
1572	.reset_resume = brcmf_usb_reset_resume,
1573	.supports_autosuspend = true,
1574	.disable_hub_initiated_lpm = 1,
1575};
1576
1577static int brcmf_usb_reset_device(struct device *dev, void *notused)
1578{
1579	/* device past is the usb interface so we
1580	 * need to use parent here.
1581	 */
1582	brcmf_dev_reset(dev->parent);
1583	return 0;
1584}
1585
1586void brcmf_usb_exit(void)
1587{
1588	struct device_driver *drv = &brcmf_usbdrvr.driver;
1589	int ret;
1590
1591	brcmf_dbg(USB, "Enter\n");
1592	ret = driver_for_each_device(drv, NULL, NULL,
1593				     brcmf_usb_reset_device);
1594	if (ret)
1595		brcmf_err("failed to reset all usb devices %d\n", ret);
1596
1597	usb_deregister(&brcmf_usbdrvr);
1598}
1599
1600int brcmf_usb_register(void)
1601{
1602	brcmf_dbg(USB, "Enter\n");
1603	return usb_register(&brcmf_usbdrvr);
1604}