/* * Copyright (c) 2011 Broadcom Corporation * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include "bus.h" #include "debug.h" #include "firmware.h" #include "usb.h" #include "core.h" #include "common.h" #include "bcdc.h" #define IOCTL_RESP_TIMEOUT msecs_to_jiffies(2000) #define BRCMF_USB_RESET_GETVER_SPINWAIT 100 /* in unit of ms */ #define BRCMF_USB_RESET_GETVER_LOOP_CNT 10 #define BRCMF_POSTBOOT_ID 0xA123 /* ID to detect if dongle has boot up */ #define BRCMF_USB_NRXQ 50 #define BRCMF_USB_NTXQ 50 #define BRCMF_USB_CBCTL_WRITE 0 #define BRCMF_USB_CBCTL_READ 1 #define BRCMF_USB_MAX_PKT_SIZE 1600 BRCMF_FW_DEF(43143, "brcmfmac43143"); BRCMF_FW_DEF(43236B, "brcmfmac43236b"); BRCMF_FW_DEF(43242A, "brcmfmac43242a"); BRCMF_FW_DEF(43569, "brcmfmac43569"); BRCMF_FW_DEF(4373, "brcmfmac4373"); static struct brcmf_firmware_mapping brcmf_usb_fwnames[] = { BRCMF_FW_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143), BRCMF_FW_ENTRY(BRCM_CC_43235_CHIP_ID, 0x00000008, 43236B), BRCMF_FW_ENTRY(BRCM_CC_43236_CHIP_ID, 0x00000008, 43236B), BRCMF_FW_ENTRY(BRCM_CC_43238_CHIP_ID, 0x00000008, 43236B), BRCMF_FW_ENTRY(BRCM_CC_43242_CHIP_ID, 0xFFFFFFFF, 43242A), BRCMF_FW_ENTRY(BRCM_CC_43566_CHIP_ID, 0xFFFFFFFF, 43569), BRCMF_FW_ENTRY(BRCM_CC_43569_CHIP_ID, 0xFFFFFFFF, 43569), BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373) }; #define TRX_MAGIC 0x30524448 /* "HDR0" */ #define TRX_MAX_OFFSET 3 /* Max number of file offsets */ #define TRX_UNCOMP_IMAGE 0x20 /* Trx holds uncompressed img */ #define TRX_RDL_CHUNK 1500 /* size of each dl transfer */ #define TRX_OFFSETS_DLFWLEN_IDX 0 /* Control messages: bRequest values */ #define DL_GETSTATE 0 /* returns the rdl_state_t struct */ #define DL_CHECK_CRC 1 /* currently unused */ #define DL_GO 2 /* execute downloaded image */ #define DL_START 3 /* initialize dl state */ #define DL_REBOOT 4 /* reboot the device in 2 seconds */ #define DL_GETVER 5 /* returns the bootrom_id_t struct */ #define DL_GO_PROTECTED 6 /* execute the downloaded code and set reset * event to occur in 2 seconds. It is the * responsibility of the downloaded code to * clear this event */ #define DL_EXEC 7 /* jump to a supplied address */ #define DL_RESETCFG 8 /* To support single enum on dongle * - Not used by bootloader */ #define DL_DEFER_RESP_OK 9 /* Potentially defer the response to setup * if resp unavailable */ /* states */ #define DL_WAITING 0 /* waiting to rx first pkt */ #define DL_READY 1 /* hdr was good, waiting for more of the * compressed image */ #define DL_BAD_HDR 2 /* hdr was corrupted */ #define DL_BAD_CRC 3 /* compressed image was corrupted */ #define DL_RUNNABLE 4 /* download was successful,waiting for go cmd */ #define DL_START_FAIL 5 /* failed to initialize correctly */ #define DL_NVRAM_TOOBIG 6 /* host specified nvram data exceeds DL_NVRAM * value */ #define DL_IMAGE_TOOBIG 7 /* firmware image too big */ struct trx_header_le { __le32 magic; /* "HDR0" */ __le32 len; /* Length of file including header */ __le32 crc32; /* CRC from flag_version to end of file */ __le32 flag_version; /* 0:15 flags, 16:31 version */ __le32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of * header */ }; struct rdl_state_le { __le32 state; __le32 bytes; }; struct bootrom_id_le { __le32 chip; /* Chip id */ __le32 chiprev; /* Chip rev */ __le32 ramsize; /* Size of RAM */ __le32 remapbase; /* Current remap base address */ __le32 boardtype; /* Type of board */ __le32 boardrev; /* Board revision */ }; struct brcmf_usb_image { struct list_head list; s8 *fwname; u8 *image; int image_len; }; struct brcmf_usbdev_info { struct brcmf_usbdev bus_pub; /* MUST BE FIRST */ spinlock_t qlock; struct list_head rx_freeq; struct list_head rx_postq; struct list_head tx_freeq; struct list_head tx_postq; uint rx_pipe, tx_pipe; int rx_low_watermark; int tx_low_watermark; int tx_high_watermark; int tx_freecount; bool tx_flowblock; spinlock_t tx_flowblock_lock; struct brcmf_usbreq *tx_reqs; struct brcmf_usbreq *rx_reqs; char fw_name[BRCMF_FW_NAME_LEN]; const u8 *image; /* buffer for combine fw and nvram */ int image_len; struct usb_device *usbdev; struct device *dev; struct mutex dev_init_lock; int ctl_in_pipe, ctl_out_pipe; struct urb *ctl_urb; /* URB for control endpoint */ struct usb_ctrlrequest ctl_write; struct usb_ctrlrequest ctl_read; u32 ctl_urb_actual_length; int ctl_urb_status; int ctl_completed; wait_queue_head_t ioctl_resp_wait; ulong ctl_op; u8 ifnum; struct urb *bulk_urb; /* used for FW download */ bool wowl_enabled; struct brcmf_mp_device *settings; }; static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo, struct brcmf_usbreq *req); static struct brcmf_usbdev *brcmf_usb_get_buspub(struct device *dev) { struct brcmf_bus *bus_if = dev_get_drvdata(dev); return bus_if->bus_priv.usb; } static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev) { return brcmf_usb_get_buspub(dev)->devinfo; } static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo) { return wait_event_timeout(devinfo->ioctl_resp_wait, devinfo->ctl_completed, IOCTL_RESP_TIMEOUT); } static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo) { wake_up(&devinfo->ioctl_resp_wait); } static void brcmf_usb_ctl_complete(struct brcmf_usbdev_info *devinfo, int type, int status) { brcmf_dbg(USB, "Enter, status=%d\n", status); if (unlikely(devinfo == NULL)) return; if (type == BRCMF_USB_CBCTL_READ) { if (status == 0) devinfo->bus_pub.stats.rx_ctlpkts++; else devinfo->bus_pub.stats.rx_ctlerrs++; } else if (type == BRCMF_USB_CBCTL_WRITE) { if (status == 0) devinfo->bus_pub.stats.tx_ctlpkts++; else devinfo->bus_pub.stats.tx_ctlerrs++; } devinfo->ctl_urb_status = status; devinfo->ctl_completed = true; brcmf_usb_ioctl_resp_wake(devinfo); } static void brcmf_usb_ctlread_complete(struct urb *urb) { struct brcmf_usbdev_info *devinfo = (struct brcmf_usbdev_info *)urb->context; brcmf_dbg(USB, "Enter\n"); devinfo->ctl_urb_actual_length = urb->actual_length; brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_READ, urb->status); } static void brcmf_usb_ctlwrite_complete(struct urb *urb) { struct brcmf_usbdev_info *devinfo = (struct brcmf_usbdev_info *)urb->context; brcmf_dbg(USB, "Enter\n"); brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_WRITE, urb->status); } static int brcmf_usb_send_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len) { int ret; u16 size; brcmf_dbg(USB, "Enter\n"); if (devinfo == NULL || buf == NULL || len == 0 || devinfo->ctl_urb == NULL) return -EINVAL; size = len; devinfo->ctl_write.wLength = cpu_to_le16p(&size); devinfo->ctl_urb->transfer_buffer_length = size; devinfo->ctl_urb_status = 0; devinfo->ctl_urb_actual_length = 0; usb_fill_control_urb(devinfo->ctl_urb, devinfo->usbdev, devinfo->ctl_out_pipe, (unsigned char *) &devinfo->ctl_write, buf, size, (usb_complete_t)brcmf_usb_ctlwrite_complete, devinfo); ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC); if (ret < 0) brcmf_err("usb_submit_urb failed %d\n", ret); return ret; } static int brcmf_usb_recv_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len) { int ret; u16 size; brcmf_dbg(USB, "Enter\n"); if ((devinfo == NULL) || (buf == NULL) || (len == 0) || (devinfo->ctl_urb == NULL)) return -EINVAL; size = len; devinfo->ctl_read.wLength = cpu_to_le16p(&size); devinfo->ctl_urb->transfer_buffer_length = size; devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE; devinfo->ctl_read.bRequest = 1; usb_fill_control_urb(devinfo->ctl_urb, devinfo->usbdev, devinfo->ctl_in_pipe, (unsigned char *) &devinfo->ctl_read, buf, size, (usb_complete_t)brcmf_usb_ctlread_complete, devinfo); ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC); if (ret < 0) brcmf_err("usb_submit_urb failed %d\n", ret); return ret; } static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len) { int err = 0; int timeout = 0; struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); brcmf_dbg(USB, "Enter\n"); if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) return -EIO; if (test_and_set_bit(0, &devinfo->ctl_op)) return -EIO; devinfo->ctl_completed = false; err = brcmf_usb_send_ctl(devinfo, buf, len); if (err) { brcmf_err("fail %d bytes: %d\n", err, len); clear_bit(0, &devinfo->ctl_op); return err; } timeout = brcmf_usb_ioctl_resp_wait(devinfo); clear_bit(0, &devinfo->ctl_op); if (!timeout) { brcmf_err("Txctl wait timed out\n"); err = -EIO; } return err; } static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len) { int err = 0; int timeout = 0; struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); brcmf_dbg(USB, "Enter\n"); if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) return -EIO; if (test_and_set_bit(0, &devinfo->ctl_op)) return -EIO; devinfo->ctl_completed = false; err = brcmf_usb_recv_ctl(devinfo, buf, len); if (err) { brcmf_err("fail %d bytes: %d\n", err, len); clear_bit(0, &devinfo->ctl_op); return err; } timeout = brcmf_usb_ioctl_resp_wait(devinfo); err = devinfo->ctl_urb_status; clear_bit(0, &devinfo->ctl_op); if (!timeout) { brcmf_err("rxctl wait timed out\n"); err = -EIO; } if (!err) return devinfo->ctl_urb_actual_length; else return err; } static struct brcmf_usbreq *brcmf_usb_deq(struct brcmf_usbdev_info *devinfo, struct list_head *q, int *counter) { unsigned long flags; struct brcmf_usbreq *req; spin_lock_irqsave(&devinfo->qlock, flags); if (list_empty(q)) { spin_unlock_irqrestore(&devinfo->qlock, flags); return NULL; } req = list_entry(q->next, struct brcmf_usbreq, list); list_del_init(q->next); if (counter) (*counter)--; spin_unlock_irqrestore(&devinfo->qlock, flags); return req; } static void brcmf_usb_enq(struct brcmf_usbdev_info *devinfo, struct list_head *q, struct brcmf_usbreq *req, int *counter) { unsigned long flags; spin_lock_irqsave(&devinfo->qlock, flags); list_add_tail(&req->list, q); if (counter) (*counter)++; spin_unlock_irqrestore(&devinfo->qlock, flags); } static struct brcmf_usbreq * brcmf_usbdev_qinit(struct list_head *q, int qsize) { int i; struct brcmf_usbreq *req, *reqs; reqs = kcalloc(qsize, sizeof(struct brcmf_usbreq), GFP_ATOMIC); if (reqs == NULL) return NULL; req = reqs; for (i = 0; i < qsize; i++) { req->urb = usb_alloc_urb(0, GFP_ATOMIC); if (!req->urb) goto fail; INIT_LIST_HEAD(&req->list); list_add_tail(&req->list, q); req++; } return reqs; fail: brcmf_err("fail!\n"); while (!list_empty(q)) { req = list_entry(q->next, struct brcmf_usbreq, list); if (req) usb_free_urb(req->urb); list_del(q->next); } return NULL; } static void brcmf_usb_free_q(struct list_head *q, bool pending) { struct brcmf_usbreq *req, *next; int i = 0; list_for_each_entry_safe(req, next, q, list) { if (!req->urb) { brcmf_err("bad req\n"); break; } i++; if (pending) { usb_kill_urb(req->urb); } else { usb_free_urb(req->urb); list_del_init(&req->list); } } } static void brcmf_usb_del_fromq(struct brcmf_usbdev_info *devinfo, struct brcmf_usbreq *req) { unsigned long flags; spin_lock_irqsave(&devinfo->qlock, flags); list_del_init(&req->list); spin_unlock_irqrestore(&devinfo->qlock, flags); } static void brcmf_usb_tx_complete(struct urb *urb) { struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context; struct brcmf_usbdev_info *devinfo = req->devinfo; unsigned long flags; brcmf_dbg(USB, "Enter, urb->status=%d, skb=%p\n", urb->status, req->skb); brcmf_usb_del_fromq(devinfo, req); brcmf_proto_bcdc_txcomplete(devinfo->dev, req->skb, urb->status == 0); req->skb = NULL; brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount); spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags); if (devinfo->tx_freecount > devinfo->tx_high_watermark && devinfo->tx_flowblock) { brcmf_proto_bcdc_txflowblock(devinfo->dev, false); devinfo->tx_flowblock = false; } spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags); } static void brcmf_usb_rx_complete(struct urb *urb) { struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context; struct brcmf_usbdev_info *devinfo = req->devinfo; struct sk_buff *skb; brcmf_dbg(USB, "Enter, urb->status=%d\n", urb->status); brcmf_usb_del_fromq(devinfo, req); skb = req->skb; req->skb = NULL; /* zero lenght packets indicate usb "failure". Do not refill */ if (urb->status != 0 || !urb->actual_length) { brcmu_pkt_buf_free_skb(skb); brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL); return; } if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP) { skb_put(skb, urb->actual_length); brcmf_rx_frame(devinfo->dev, skb, true); brcmf_usb_rx_refill(devinfo, req); } else { brcmu_pkt_buf_free_skb(skb); brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL); } return; } static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo, struct brcmf_usbreq *req) { struct sk_buff *skb; int ret; if (!req || !devinfo) return; skb = dev_alloc_skb(devinfo->bus_pub.bus_mtu); if (!skb) { brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL); return; } req->skb = skb; usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->rx_pipe, skb->data, skb_tailroom(skb), brcmf_usb_rx_complete, req); req->devinfo = devinfo; brcmf_usb_enq(devinfo, &devinfo->rx_postq, req, NULL); ret = usb_submit_urb(req->urb, GFP_ATOMIC); if (ret) { brcmf_usb_del_fromq(devinfo, req); brcmu_pkt_buf_free_skb(req->skb); req->skb = NULL; brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL); } return; } static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo) { struct brcmf_usbreq *req; if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) { brcmf_err("bus is not up=%d\n", devinfo->bus_pub.state); return; } while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL) brcmf_usb_rx_refill(devinfo, req); } static void brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state) { struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus; int old_state; brcmf_dbg(USB, "Enter, current state=%d, new state=%d\n", devinfo->bus_pub.state, state); if (devinfo->bus_pub.state == state) return; old_state = devinfo->bus_pub.state; devinfo->bus_pub.state = state; /* update state of upper layer */ if (state == BRCMFMAC_USB_STATE_DOWN) { brcmf_dbg(USB, "DBUS is down\n"); brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_DOWN); } else if (state == BRCMFMAC_USB_STATE_UP) { brcmf_dbg(USB, "DBUS is up\n"); brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_UP); } else { brcmf_dbg(USB, "DBUS current state=%d\n", state); } } static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb) { struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); struct brcmf_usbreq *req; int ret; unsigned long flags; brcmf_dbg(USB, "Enter, skb=%p\n", skb); if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) { ret = -EIO; goto fail; } req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq, &devinfo->tx_freecount); if (!req) { brcmf_err("no req to send\n"); ret = -ENOMEM; goto fail; } req->skb = skb; req->devinfo = devinfo; usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe, skb->data, skb->len, brcmf_usb_tx_complete, req); req->urb->transfer_flags |= URB_ZERO_PACKET; brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL); ret = usb_submit_urb(req->urb, GFP_ATOMIC); if (ret) { brcmf_err("brcmf_usb_tx usb_submit_urb FAILED\n"); brcmf_usb_del_fromq(devinfo, req); req->skb = NULL; brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount); goto fail; } spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags); if (devinfo->tx_freecount < devinfo->tx_low_watermark && !devinfo->tx_flowblock) { brcmf_proto_bcdc_txflowblock(dev, true); devinfo->tx_flowblock = true; } spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags); return 0; fail: return ret; } static int brcmf_usb_up(struct device *dev) { struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); brcmf_dbg(USB, "Enter\n"); if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP) return 0; /* Success, indicate devinfo is fully up */ brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_UP); if (devinfo->ctl_urb) { devinfo->ctl_in_pipe = usb_rcvctrlpipe(devinfo->usbdev, 0); devinfo->ctl_out_pipe = usb_sndctrlpipe(devinfo->usbdev, 0); /* CTL Write */ devinfo->ctl_write.bRequestType = USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE; devinfo->ctl_write.bRequest = 0; devinfo->ctl_write.wValue = cpu_to_le16(0); devinfo->ctl_write.wIndex = cpu_to_le16(devinfo->ifnum); /* CTL Read */ devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE; devinfo->ctl_read.bRequest = 1; devinfo->ctl_read.wValue = cpu_to_le16(0); devinfo->ctl_read.wIndex = cpu_to_le16(devinfo->ifnum); } brcmf_usb_rx_fill_all(devinfo); return 0; } static void brcmf_cancel_all_urbs(struct brcmf_usbdev_info *devinfo) { if (devinfo->ctl_urb) usb_kill_urb(devinfo->ctl_urb); if (devinfo->bulk_urb) usb_kill_urb(devinfo->bulk_urb); brcmf_usb_free_q(&devinfo->tx_postq, true); brcmf_usb_free_q(&devinfo->rx_postq, true); } static void brcmf_usb_down(struct device *dev) { struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); brcmf_dbg(USB, "Enter\n"); if (devinfo == NULL) return; if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_DOWN) return; brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_DOWN); brcmf_cancel_all_urbs(devinfo); } static void brcmf_usb_sync_complete(struct urb *urb) { struct brcmf_usbdev_info *devinfo = (struct brcmf_usbdev_info *)urb->context; devinfo->ctl_completed = true; brcmf_usb_ioctl_resp_wake(devinfo); } static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd, void *buffer, int buflen) { int ret; char *tmpbuf; u16 size; if ((!devinfo) || (devinfo->ctl_urb == NULL)) return -EINVAL; tmpbuf = kmalloc(buflen, GFP_ATOMIC); if (!tmpbuf) return -ENOMEM; size = buflen; devinfo->ctl_urb->transfer_buffer_length = size; devinfo->ctl_read.wLength = cpu_to_le16p(&size); devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE; devinfo->ctl_read.bRequest = cmd; usb_fill_control_urb(devinfo->ctl_urb, devinfo->usbdev, usb_rcvctrlpipe(devinfo->usbdev, 0), (unsigned char *) &devinfo->ctl_read, (void *) tmpbuf, size, (usb_complete_t)brcmf_usb_sync_complete, devinfo); devinfo->ctl_completed = false; ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC); if (ret < 0) { brcmf_err("usb_submit_urb failed %d\n", ret); goto finalize; } if (!brcmf_usb_ioctl_resp_wait(devinfo)) { usb_kill_urb(devinfo->ctl_urb); ret = -ETIMEDOUT; } else { memcpy(buffer, tmpbuf, buflen); } finalize: kfree(tmpbuf); return ret; } static bool brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo) { struct bootrom_id_le id; u32 chipid, chiprev; brcmf_dbg(USB, "Enter\n"); if (devinfo == NULL) return false; /* Check if firmware downloaded already by querying runtime ID */ id.chip = cpu_to_le32(0xDEAD); brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id)); chipid = le32_to_cpu(id.chip); chiprev = le32_to_cpu(id.chiprev); if ((chipid & 0x4300) == 0x4300) brcmf_dbg(USB, "chip %x rev 0x%x\n", chipid, chiprev); else brcmf_dbg(USB, "chip %d rev 0x%x\n", chipid, chiprev); if (chipid == BRCMF_POSTBOOT_ID) { brcmf_dbg(USB, "firmware already downloaded\n"); brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id)); return false; } else { devinfo->bus_pub.devid = chipid; devinfo->bus_pub.chiprev = chiprev; } return true; } static int brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo) { struct bootrom_id_le id; u32 loop_cnt; int err; brcmf_dbg(USB, "Enter\n"); loop_cnt = 0; do { mdelay(BRCMF_USB_RESET_GETVER_SPINWAIT); loop_cnt++; id.chip = cpu_to_le32(0xDEAD); /* Get the ID */ err = brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id)); if ((err) && (err != -ETIMEDOUT)) return err; if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) break; } while (loop_cnt < BRCMF_USB_RESET_GETVER_LOOP_CNT); if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) { brcmf_dbg(USB, "postboot chip 0x%x/rev 0x%x\n", le32_to_cpu(id.chip), le32_to_cpu(id.chiprev)); brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id)); return 0; } else { brcmf_err("Cannot talk to Dongle. Firmware is not UP, %d ms\n", BRCMF_USB_RESET_GETVER_SPINWAIT * loop_cnt); return -EINVAL; } } static int brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len) { int ret; if ((devinfo == NULL) || (devinfo->bulk_urb == NULL)) return -EINVAL; /* Prepare the URB */ usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev, devinfo->tx_pipe, buffer, len, (usb_complete_t)brcmf_usb_sync_complete, devinfo); devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET; devinfo->ctl_completed = false; ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC); if (ret) { brcmf_err("usb_submit_urb failed %d\n", ret); return ret; } ret = brcmf_usb_ioctl_resp_wait(devinfo); return (ret == 0); } static int brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen) { unsigned int sendlen, sent, dllen; char *bulkchunk = NULL, *dlpos; struct rdl_state_le state; u32 rdlstate, rdlbytes; int err = 0; brcmf_dbg(USB, "Enter, fw %p, len %d\n", fw, fwlen); bulkchunk = kmalloc(TRX_RDL_CHUNK, GFP_ATOMIC); if (bulkchunk == NULL) { err = -ENOMEM; goto fail; } /* 1) Prepare USB boot loader for runtime image */ brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state)); rdlstate = le32_to_cpu(state.state); rdlbytes = le32_to_cpu(state.bytes); /* 2) Check we are in the Waiting state */ if (rdlstate != DL_WAITING) { brcmf_err("Failed to DL_START\n"); err = -EINVAL; goto fail; } sent = 0; dlpos = fw; dllen = fwlen; /* Get chip id and rev */ while (rdlbytes != dllen) { /* Wait until the usb device reports it received all * the bytes we sent */ if ((rdlbytes == sent) && (rdlbytes != dllen)) { if ((dllen-sent) < TRX_RDL_CHUNK) sendlen = dllen-sent; else sendlen = TRX_RDL_CHUNK; /* simply avoid having to send a ZLP by ensuring we * never have an even * multiple of 64 */ if (!(sendlen % 64)) sendlen -= 4; /* send data */ memcpy(bulkchunk, dlpos, sendlen); if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk, sendlen)) { brcmf_err("send_bulk failed\n"); err = -EINVAL; goto fail; } dlpos += sendlen; sent += sendlen; } err = brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state)); if (err) { brcmf_err("DL_GETSTATE Failed\n"); goto fail; } rdlstate = le32_to_cpu(state.state); rdlbytes = le32_to_cpu(state.bytes); /* restart if an error is reported */ if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) { brcmf_err("Bad Hdr or Bad CRC state %d\n", rdlstate); err = -EINVAL; goto fail; } } fail: kfree(bulkchunk); brcmf_dbg(USB, "Exit, err=%d\n", err); return err; } static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len) { int err; brcmf_dbg(USB, "Enter\n"); if (devinfo == NULL) return -EINVAL; if (devinfo->bus_pub.devid == 0xDEAD) return -EINVAL; err = brcmf_usb_dl_writeimage(devinfo, fw, len); if (err == 0) devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_DONE; else devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_FAIL; brcmf_dbg(USB, "Exit, err=%d\n", err); return err; } static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo) { struct rdl_state_le state; brcmf_dbg(USB, "Enter\n"); if (!devinfo) return -EINVAL; if (devinfo->bus_pub.devid == 0xDEAD) return -EINVAL; /* Check we are runnable */ state.state = 0; brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state)); /* Start the image */ if (state.state == cpu_to_le32(DL_RUNNABLE)) { if (brcmf_usb_dl_cmd(devinfo, DL_GO, &state, sizeof(state))) return -ENODEV; if (brcmf_usb_resetcfg(devinfo)) return -ENODEV; /* The Dongle may go for re-enumeration. */ } else { brcmf_err("Dongle not runnable\n"); return -EINVAL; } brcmf_dbg(USB, "Exit\n"); return 0; } static int brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo) { int err; brcmf_dbg(USB, "Enter\n"); if (devinfo == NULL) return -ENODEV; if (!devinfo->image) { brcmf_err("No firmware!\n"); return -ENOENT; } err = brcmf_usb_dlstart(devinfo, (u8 *)devinfo->image, devinfo->image_len); if (err == 0) err = brcmf_usb_dlrun(devinfo); return err; } static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo) { brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo); /* free the URBS */ brcmf_usb_free_q(&devinfo->rx_freeq, false); brcmf_usb_free_q(&devinfo->tx_freeq, false); usb_free_urb(devinfo->ctl_urb); usb_free_urb(devinfo->bulk_urb); kfree(devinfo->tx_reqs); kfree(devinfo->rx_reqs); if (devinfo->settings) brcmf_release_module_param(devinfo->settings); } static int check_file(const u8 *headers) { struct trx_header_le *trx; int actual_len = -1; brcmf_dbg(USB, "Enter\n"); /* Extract trx header */ trx = (struct trx_header_le *) headers; if (trx->magic != cpu_to_le32(TRX_MAGIC)) return -1; headers += sizeof(struct trx_header_le); if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) { actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]); return actual_len + sizeof(struct trx_header_le); } return -1; } static struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo, int nrxq, int ntxq) { brcmf_dbg(USB, "Enter\n"); devinfo->bus_pub.nrxq = nrxq; devinfo->rx_low_watermark = nrxq / 2; devinfo->bus_pub.devinfo = devinfo; devinfo->bus_pub.ntxq = ntxq; devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DOWN; /* flow control when too many tx urbs posted */ devinfo->tx_low_watermark = ntxq / 4; devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3; devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE; /* Initialize other structure content */ init_waitqueue_head(&devinfo->ioctl_resp_wait); /* Initialize the spinlocks */ spin_lock_init(&devinfo->qlock); spin_lock_init(&devinfo->tx_flowblock_lock); INIT_LIST_HEAD(&devinfo->rx_freeq); INIT_LIST_HEAD(&devinfo->rx_postq); INIT_LIST_HEAD(&devinfo->tx_freeq); INIT_LIST_HEAD(&devinfo->tx_postq); devinfo->tx_flowblock = false; devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq); if (!devinfo->rx_reqs) goto error; devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq); if (!devinfo->tx_reqs) goto error; devinfo->tx_freecount = ntxq; devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC); if (!devinfo->ctl_urb) goto error; devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC); if (!devinfo->bulk_urb) goto error; return &devinfo->bus_pub; error: brcmf_err("failed!\n"); brcmf_usb_detach(devinfo); return NULL; } static void brcmf_usb_wowl_config(struct device *dev, bool enabled) { struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev); brcmf_dbg(USB, "Configuring WOWL, enabled=%d\n", enabled); devinfo->wowl_enabled = enabled; if (enabled) device_set_wakeup_enable(devinfo->dev, true); else device_set_wakeup_enable(devinfo->dev, false); } static int brcmf_usb_get_fwname(struct device *dev, const char *ext, u8 *fw_name) { struct brcmf_bus *bus = dev_get_drvdata(dev); struct brcmf_fw_request *fwreq; struct brcmf_fw_name fwnames[] = { { ext, fw_name }, }; fwreq = brcmf_fw_alloc_request(bus->chip, bus->chiprev, brcmf_usb_fwnames, ARRAY_SIZE(brcmf_usb_fwnames), fwnames, ARRAY_SIZE(fwnames)); if (!fwreq) return -ENOMEM; kfree(fwreq); return 0; } static const struct brcmf_bus_ops brcmf_usb_bus_ops = { .preinit = brcmf_usb_up, .stop = brcmf_usb_down, .txdata = brcmf_usb_tx, .txctl = brcmf_usb_tx_ctlpkt, .rxctl = brcmf_usb_rx_ctlpkt, .wowl_config = brcmf_usb_wowl_config, .get_fwname = brcmf_usb_get_fwname, }; #define BRCMF_USB_FW_CODE 0 static void brcmf_usb_probe_phase2(struct device *dev, int ret, struct brcmf_fw_request *fwreq) { struct brcmf_bus *bus = dev_get_drvdata(dev); struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo; const struct firmware *fw; if (ret) goto error; brcmf_dbg(USB, "Start fw downloading\n"); fw = fwreq->items[BRCMF_USB_FW_CODE].binary; kfree(fwreq); ret = check_file(fw->data); if (ret < 0) { brcmf_err("invalid firmware\n"); release_firmware(fw); goto error; } devinfo->image = fw->data; devinfo->image_len = fw->size; ret = brcmf_usb_fw_download(devinfo); release_firmware(fw); if (ret) goto error; /* Attach to the common driver interface */ ret = brcmf_attach(devinfo->dev, devinfo->settings); if (ret) goto error; mutex_unlock(&devinfo->dev_init_lock); return; error: brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret); mutex_unlock(&devinfo->dev_init_lock); device_release_driver(dev); } static struct brcmf_fw_request * brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info *devinfo) { struct brcmf_fw_request *fwreq; struct brcmf_fw_name fwnames[] = { { ".bin", devinfo->fw_name }, }; fwreq = brcmf_fw_alloc_request(devinfo->bus_pub.devid, devinfo->bus_pub.chiprev, brcmf_usb_fwnames, ARRAY_SIZE(brcmf_usb_fwnames), fwnames, ARRAY_SIZE(fwnames)); if (!fwreq) return NULL; fwreq->items[BRCMF_USB_FW_CODE].type = BRCMF_FW_TYPE_BINARY; return fwreq; } static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo) { struct brcmf_bus *bus = NULL; struct brcmf_usbdev *bus_pub = NULL; struct device *dev = devinfo->dev; struct brcmf_fw_request *fwreq; int ret; brcmf_dbg(USB, "Enter\n"); bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ); if (!bus_pub) return -ENODEV; bus = kzalloc(sizeof(struct brcmf_bus), GFP_ATOMIC); if (!bus) { ret = -ENOMEM; goto fail; } bus->dev = dev; bus_pub->bus = bus; bus->bus_priv.usb = bus_pub; dev_set_drvdata(dev, bus); bus->ops = &brcmf_usb_bus_ops; bus->proto_type = BRCMF_PROTO_BCDC; bus->always_use_fws_queue = true; #ifdef CONFIG_PM bus->wowl_supported = true; #endif devinfo->settings = brcmf_get_module_param(bus->dev, BRCMF_BUSTYPE_USB, bus_pub->devid, bus_pub->chiprev); if (!devinfo->settings) { ret = -ENOMEM; goto fail; } if (!brcmf_usb_dlneeded(devinfo)) { ret = brcmf_attach(devinfo->dev, devinfo->settings); if (ret) goto fail; /* we are done */ mutex_unlock(&devinfo->dev_init_lock); return 0; } bus->chip = bus_pub->devid; bus->chiprev = bus_pub->chiprev; fwreq = brcmf_usb_prepare_fw_request(devinfo); if (!fwreq) { ret = -ENOMEM; goto fail; } /* request firmware here */ ret = brcmf_fw_get_firmwares(dev, fwreq, brcmf_usb_probe_phase2); if (ret) { brcmf_err("firmware request failed: %d\n", ret); kfree(fwreq); goto fail; } return 0; fail: /* Release resources in reverse order */ kfree(bus); brcmf_usb_detach(devinfo); return ret; } static void brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo) { if (!devinfo) return; brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo); brcmf_detach(devinfo->dev); kfree(devinfo->bus_pub.bus); brcmf_usb_detach(devinfo); } static int brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *usb = interface_to_usbdev(intf); struct brcmf_usbdev_info *devinfo; struct usb_interface_descriptor *desc; struct usb_endpoint_descriptor *endpoint; int ret = 0; u32 num_of_eps; u8 endpoint_num, ep; brcmf_dbg(USB, "Enter 0x%04x:0x%04x\n", id->idVendor, id->idProduct); devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC); if (devinfo == NULL) return -ENOMEM; devinfo->usbdev = usb; devinfo->dev = &usb->dev; /* Take an init lock, to protect for disconnect while still loading. * Necessary because of the asynchronous firmware load construction */ mutex_init(&devinfo->dev_init_lock); mutex_lock(&devinfo->dev_init_lock); usb_set_intfdata(intf, devinfo); /* Check that the device supports only one configuration */ if (usb->descriptor.bNumConfigurations != 1) { brcmf_err("Number of configurations: %d not supported\n", usb->descriptor.bNumConfigurations); ret = -ENODEV; goto fail; } if ((usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) && (usb->descriptor.bDeviceClass != USB_CLASS_MISC) && (usb->descriptor.bDeviceClass != USB_CLASS_WIRELESS_CONTROLLER)) { brcmf_err("Device class: 0x%x not supported\n", usb->descriptor.bDeviceClass); ret = -ENODEV; goto fail; } desc = &intf->altsetting[0].desc; if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || (desc->bInterfaceSubClass != 2) || (desc->bInterfaceProtocol != 0xff)) { brcmf_err("non WLAN interface %d: 0x%x:0x%x:0x%x\n", desc->bInterfaceNumber, desc->bInterfaceClass, desc->bInterfaceSubClass, desc->bInterfaceProtocol); ret = -ENODEV; goto fail; } num_of_eps = desc->bNumEndpoints; for (ep = 0; ep < num_of_eps; ep++) { endpoint = &intf->altsetting[0].endpoint[ep].desc; endpoint_num = usb_endpoint_num(endpoint); if (!usb_endpoint_xfer_bulk(endpoint)) continue; if (usb_endpoint_dir_in(endpoint)) { if (!devinfo->rx_pipe) devinfo->rx_pipe = usb_rcvbulkpipe(usb, endpoint_num); } else { if (!devinfo->tx_pipe) devinfo->tx_pipe = usb_sndbulkpipe(usb, endpoint_num); } } if (devinfo->rx_pipe == 0) { brcmf_err("No RX (in) Bulk EP found\n"); ret = -ENODEV; goto fail; } if (devinfo->tx_pipe == 0) { brcmf_err("No TX (out) Bulk EP found\n"); ret = -ENODEV; goto fail; } devinfo->ifnum = desc->bInterfaceNumber; if (usb->speed == USB_SPEED_SUPER_PLUS) brcmf_dbg(USB, "Broadcom super speed plus USB WLAN interface detected\n"); else if (usb->speed == USB_SPEED_SUPER) brcmf_dbg(USB, "Broadcom super speed USB WLAN interface detected\n"); else if (usb->speed == USB_SPEED_HIGH) brcmf_dbg(USB, "Broadcom high speed USB WLAN interface detected\n"); else brcmf_dbg(USB, "Broadcom full speed USB WLAN interface detected\n"); ret = brcmf_usb_probe_cb(devinfo); if (ret) goto fail; /* Success */ return 0; fail: mutex_unlock(&devinfo->dev_init_lock); kfree(devinfo); usb_set_intfdata(intf, NULL); return ret; } static void brcmf_usb_disconnect(struct usb_interface *intf) { struct brcmf_usbdev_info *devinfo; brcmf_dbg(USB, "Enter\n"); devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf); if (devinfo) { mutex_lock(&devinfo->dev_init_lock); /* Make sure that devinfo still exists. Firmware probe routines * may have released the device and cleared the intfdata. */ if (!usb_get_intfdata(intf)) goto done; brcmf_usb_disconnect_cb(devinfo); kfree(devinfo); } done: brcmf_dbg(USB, "Exit\n"); } /* * only need to signal the bus being down and update the state. */ static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state) { struct usb_device *usb = interface_to_usbdev(intf); struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev); brcmf_dbg(USB, "Enter\n"); devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP; if (devinfo->wowl_enabled) brcmf_cancel_all_urbs(devinfo); else brcmf_detach(&usb->dev); return 0; } /* * (re-) start the bus. */ static int brcmf_usb_resume(struct usb_interface *intf) { struct usb_device *usb = interface_to_usbdev(intf); struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev); brcmf_dbg(USB, "Enter\n"); if (!devinfo->wowl_enabled) return brcmf_attach(devinfo->dev, devinfo->settings); devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP; brcmf_usb_rx_fill_all(devinfo); return 0; } static int brcmf_usb_reset_resume(struct usb_interface *intf) { struct usb_device *usb = interface_to_usbdev(intf); struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev); struct brcmf_fw_request *fwreq; int ret; brcmf_dbg(USB, "Enter\n"); fwreq = brcmf_usb_prepare_fw_request(devinfo); if (!fwreq) return -ENOMEM; ret = brcmf_fw_get_firmwares(&usb->dev, fwreq, brcmf_usb_probe_phase2); if (ret < 0) kfree(fwreq); return ret; } #define BRCMF_USB_DEVICE(dev_id) \ { USB_DEVICE(BRCM_USB_VENDOR_ID_BROADCOM, dev_id) } #define LINKSYS_USB_DEVICE(dev_id) \ { USB_DEVICE(BRCM_USB_VENDOR_ID_LINKSYS, dev_id) } #define CYPRESS_USB_DEVICE(dev_id) \ { USB_DEVICE(CY_USB_VENDOR_ID_CYPRESS, dev_id) } static const struct usb_device_id brcmf_usb_devid_table[] = { BRCMF_USB_DEVICE(BRCM_USB_43143_DEVICE_ID), BRCMF_USB_DEVICE(BRCM_USB_43236_DEVICE_ID), BRCMF_USB_DEVICE(BRCM_USB_43242_DEVICE_ID), BRCMF_USB_DEVICE(BRCM_USB_43569_DEVICE_ID), LINKSYS_USB_DEVICE(BRCM_USB_43235_LINKSYS_DEVICE_ID), CYPRESS_USB_DEVICE(CY_USB_4373_DEVICE_ID), { USB_DEVICE(BRCM_USB_VENDOR_ID_LG, BRCM_USB_43242_LG_DEVICE_ID) }, /* special entry for device with firmware loaded and running */ BRCMF_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID), CYPRESS_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID), { /* end: all zeroes */ } }; MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table); static struct usb_driver brcmf_usbdrvr = { .name = KBUILD_MODNAME, .probe = brcmf_usb_probe, .disconnect = brcmf_usb_disconnect, .id_table = brcmf_usb_devid_table, .suspend = brcmf_usb_suspend, .resume = brcmf_usb_resume, .reset_resume = brcmf_usb_reset_resume, .disable_hub_initiated_lpm = 1, }; static int brcmf_usb_reset_device(struct device *dev, void *notused) { /* device past is the usb interface so we * need to use parent here. */ brcmf_dev_reset(dev->parent); return 0; } void brcmf_usb_exit(void) { struct device_driver *drv = &brcmf_usbdrvr.drvwrap.driver; int ret; brcmf_dbg(USB, "Enter\n"); ret = driver_for_each_device(drv, NULL, NULL, brcmf_usb_reset_device); usb_deregister(&brcmf_usbdrvr); } void brcmf_usb_register(void) { brcmf_dbg(USB, "Enter\n"); usb_register(&brcmf_usbdrvr); }