/* * Copyright (c) 2010-2011 Atheros Communications Inc. * * 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 <asm/unaligned.h> #include "htc.h" /* identify firmware images */ #define FIRMWARE_AR7010_1_1 "htc_7010.fw" #define FIRMWARE_AR9271 "htc_9271.fw" MODULE_FIRMWARE(FIRMWARE_AR7010_1_1); MODULE_FIRMWARE(FIRMWARE_AR9271); static struct usb_device_id ath9k_hif_usb_ids[] = { { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */ { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */ { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */ { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */ { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */ { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */ { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */ { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */ { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */ { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */ { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */ { USB_DEVICE(0x040D, 0x3801) }, /* VIA */ { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */ { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */ { USB_DEVICE(0x0cf3, 0x7015), .driver_info = AR9287_USB }, /* Atheros */ { USB_DEVICE(0x1668, 0x1200), .driver_info = AR9287_USB }, /* Verizon */ { USB_DEVICE(0x0cf3, 0x7010), .driver_info = AR9280_USB }, /* Atheros */ { USB_DEVICE(0x0846, 0x9018), .driver_info = AR9280_USB }, /* Netgear WNDA3200 */ { USB_DEVICE(0x083A, 0xA704), .driver_info = AR9280_USB }, /* SMC Networks */ { USB_DEVICE(0x0411, 0x017f), .driver_info = AR9280_USB }, /* Sony UWA-BR100 */ { USB_DEVICE(0x0cf3, 0x20ff), .driver_info = STORAGE_DEVICE }, { }, }; MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids); static int __hif_usb_tx(struct hif_device_usb *hif_dev); static void hif_usb_regout_cb(struct urb *urb) { struct cmd_buf *cmd = (struct cmd_buf *)urb->context; switch (urb->status) { case 0: break; case -ENOENT: case -ECONNRESET: case -ENODEV: case -ESHUTDOWN: goto free; default: break; } if (cmd) { ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, cmd->skb, true); kfree(cmd); } return; free: kfree_skb(cmd->skb); kfree(cmd); } static int hif_usb_send_regout(struct hif_device_usb *hif_dev, struct sk_buff *skb) { struct urb *urb; struct cmd_buf *cmd; int ret = 0; urb = usb_alloc_urb(0, GFP_KERNEL); if (urb == NULL) return -ENOMEM; cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); if (cmd == NULL) { usb_free_urb(urb); return -ENOMEM; } cmd->skb = skb; cmd->hif_dev = hif_dev; usb_fill_bulk_urb(urb, hif_dev->udev, usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE), skb->data, skb->len, hif_usb_regout_cb, cmd); usb_anchor_urb(urb, &hif_dev->regout_submitted); ret = usb_submit_urb(urb, GFP_KERNEL); if (ret) { usb_unanchor_urb(urb); kfree(cmd); } usb_free_urb(urb); return ret; } static void hif_usb_mgmt_cb(struct urb *urb) { struct cmd_buf *cmd = (struct cmd_buf *)urb->context; struct hif_device_usb *hif_dev; bool txok = true; if (!cmd || !cmd->skb || !cmd->hif_dev) return; hif_dev = cmd->hif_dev; switch (urb->status) { case 0: break; case -ENOENT: case -ECONNRESET: case -ENODEV: case -ESHUTDOWN: txok = false; /* * If the URBs are being flushed, no need to complete * this packet. */ spin_lock(&hif_dev->tx.tx_lock); if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { spin_unlock(&hif_dev->tx.tx_lock); dev_kfree_skb_any(cmd->skb); kfree(cmd); return; } spin_unlock(&hif_dev->tx.tx_lock); break; default: txok = false; break; } skb_pull(cmd->skb, 4); ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, cmd->skb, txok); kfree(cmd); } static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev, struct sk_buff *skb) { struct urb *urb; struct cmd_buf *cmd; int ret = 0; __le16 *hdr; urb = usb_alloc_urb(0, GFP_ATOMIC); if (urb == NULL) return -ENOMEM; cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); if (cmd == NULL) { usb_free_urb(urb); return -ENOMEM; } cmd->skb = skb; cmd->hif_dev = hif_dev; hdr = (__le16 *) skb_push(skb, 4); *hdr++ = cpu_to_le16(skb->len - 4); *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); usb_fill_bulk_urb(urb, hif_dev->udev, usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), skb->data, skb->len, hif_usb_mgmt_cb, cmd); usb_anchor_urb(urb, &hif_dev->mgmt_submitted); ret = usb_submit_urb(urb, GFP_ATOMIC); if (ret) { usb_unanchor_urb(urb); kfree(cmd); } usb_free_urb(urb); return ret; } static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev, struct sk_buff_head *list) { struct sk_buff *skb; while ((skb = __skb_dequeue(list)) != NULL) { dev_kfree_skb_any(skb); } } static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev, struct sk_buff_head *queue, bool txok) { struct sk_buff *skb; while ((skb = __skb_dequeue(queue)) != NULL) { ath9k_htc_txcompletion_cb(hif_dev->htc_handle, skb, txok); if (txok) TX_STAT_INC(skb_success); else TX_STAT_INC(skb_failed); } } static void hif_usb_tx_cb(struct urb *urb) { struct tx_buf *tx_buf = (struct tx_buf *) urb->context; struct hif_device_usb *hif_dev; bool txok = true; if (!tx_buf || !tx_buf->hif_dev) return; hif_dev = tx_buf->hif_dev; switch (urb->status) { case 0: break; case -ENOENT: case -ECONNRESET: case -ENODEV: case -ESHUTDOWN: txok = false; /* * If the URBs are being flushed, no need to add this * URB to the free list. */ spin_lock(&hif_dev->tx.tx_lock); if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { spin_unlock(&hif_dev->tx.tx_lock); ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue); return; } spin_unlock(&hif_dev->tx.tx_lock); break; default: txok = false; break; } ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok); /* Re-initialize the SKB queue */ tx_buf->len = tx_buf->offset = 0; __skb_queue_head_init(&tx_buf->skb_queue); /* Add this TX buffer to the free list */ spin_lock(&hif_dev->tx.tx_lock); list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); hif_dev->tx.tx_buf_cnt++; if (!(hif_dev->tx.flags & HIF_USB_TX_STOP)) __hif_usb_tx(hif_dev); /* Check for pending SKBs */ TX_STAT_INC(buf_completed); spin_unlock(&hif_dev->tx.tx_lock); } /* TX lock has to be taken */ static int __hif_usb_tx(struct hif_device_usb *hif_dev) { struct tx_buf *tx_buf = NULL; struct sk_buff *nskb = NULL; int ret = 0, i; u16 tx_skb_cnt = 0; u8 *buf; __le16 *hdr; if (hif_dev->tx.tx_skb_cnt == 0) return 0; /* Check if a free TX buffer is available */ if (list_empty(&hif_dev->tx.tx_buf)) return 0; tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list); list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending); hif_dev->tx.tx_buf_cnt--; tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM); for (i = 0; i < tx_skb_cnt; i++) { nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue); /* Should never be NULL */ BUG_ON(!nskb); hif_dev->tx.tx_skb_cnt--; buf = tx_buf->buf; buf += tx_buf->offset; hdr = (__le16 *)buf; *hdr++ = cpu_to_le16(nskb->len); *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); buf += 4; memcpy(buf, nskb->data, nskb->len); tx_buf->len = nskb->len + 4; if (i < (tx_skb_cnt - 1)) tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4; if (i == (tx_skb_cnt - 1)) tx_buf->len += tx_buf->offset; __skb_queue_tail(&tx_buf->skb_queue, nskb); TX_STAT_INC(skb_queued); } usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev, usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), tx_buf->buf, tx_buf->len, hif_usb_tx_cb, tx_buf); ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC); if (ret) { tx_buf->len = tx_buf->offset = 0; ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false); __skb_queue_head_init(&tx_buf->skb_queue); list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); hif_dev->tx.tx_buf_cnt++; } if (!ret) TX_STAT_INC(buf_queued); return ret; } static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb) { struct ath9k_htc_tx_ctl *tx_ctl; unsigned long flags; int ret = 0; spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); if (hif_dev->tx.flags & HIF_USB_TX_STOP) { spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); return -ENODEV; } /* Check if the max queue count has been reached */ if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); return -ENOMEM; } spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); tx_ctl = HTC_SKB_CB(skb); /* Mgmt/Beacon frames don't use the TX buffer pool */ if ((tx_ctl->type == ATH9K_HTC_MGMT) || (tx_ctl->type == ATH9K_HTC_BEACON)) { ret = hif_usb_send_mgmt(hif_dev, skb); } spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); if ((tx_ctl->type == ATH9K_HTC_NORMAL) || (tx_ctl->type == ATH9K_HTC_AMPDU)) { __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); hif_dev->tx.tx_skb_cnt++; } /* Check if AMPDUs have to be sent immediately */ if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && (hif_dev->tx.tx_skb_cnt < 2)) { __hif_usb_tx(hif_dev); } spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); return ret; } static void hif_usb_start(void *hif_handle) { struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; unsigned long flags; hif_dev->flags |= HIF_USB_START; spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); hif_dev->tx.flags &= ~HIF_USB_TX_STOP; spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); } static void hif_usb_stop(void *hif_handle) { struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; unsigned long flags; spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false); hif_dev->tx.tx_skb_cnt = 0; hif_dev->tx.flags |= HIF_USB_TX_STOP; spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); /* The pending URBs have to be canceled. */ list_for_each_entry_safe(tx_buf, tx_buf_tmp, &hif_dev->tx.tx_pending, list) { usb_kill_urb(tx_buf->urb); } usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); } static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) { struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; int ret = 0; switch (pipe_id) { case USB_WLAN_TX_PIPE: ret = hif_usb_send_tx(hif_dev, skb); break; case USB_REG_OUT_PIPE: ret = hif_usb_send_regout(hif_dev, skb); break; default: dev_err(&hif_dev->udev->dev, "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); ret = -EINVAL; break; } return ret; } static inline bool check_index(struct sk_buff *skb, u8 idx) { struct ath9k_htc_tx_ctl *tx_ctl; tx_ctl = HTC_SKB_CB(skb); if ((tx_ctl->type == ATH9K_HTC_AMPDU) && (tx_ctl->sta_idx == idx)) return true; return false; } static void hif_usb_sta_drain(void *hif_handle, u8 idx) { struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; struct sk_buff *skb, *tmp; unsigned long flags; spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { if (check_index(skb, idx)) { __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); ath9k_htc_txcompletion_cb(hif_dev->htc_handle, skb, false); hif_dev->tx.tx_skb_cnt--; TX_STAT_INC(skb_failed); } } spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); } static struct ath9k_htc_hif hif_usb = { .transport = ATH9K_HIF_USB, .name = "ath9k_hif_usb", .control_ul_pipe = USB_REG_OUT_PIPE, .control_dl_pipe = USB_REG_IN_PIPE, .start = hif_usb_start, .stop = hif_usb_stop, .sta_drain = hif_usb_sta_drain, .send = hif_usb_send, }; static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, struct sk_buff *skb) { struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; int index = 0, i = 0, len = skb->len; int rx_remain_len, rx_pkt_len; u16 pool_index = 0; u8 *ptr; spin_lock(&hif_dev->rx_lock); rx_remain_len = hif_dev->rx_remain_len; rx_pkt_len = hif_dev->rx_transfer_len; if (rx_remain_len != 0) { struct sk_buff *remain_skb = hif_dev->remain_skb; if (remain_skb) { ptr = (u8 *) remain_skb->data; index = rx_remain_len; rx_remain_len -= hif_dev->rx_pad_len; ptr += rx_pkt_len; memcpy(ptr, skb->data, rx_remain_len); rx_pkt_len += rx_remain_len; hif_dev->rx_remain_len = 0; skb_put(remain_skb, rx_pkt_len); skb_pool[pool_index++] = remain_skb; } else { index = rx_remain_len; } } spin_unlock(&hif_dev->rx_lock); while (index < len) { u16 pkt_len; u16 pkt_tag; u16 pad_len; int chk_idx; ptr = (u8 *) skb->data; pkt_len = get_unaligned_le16(ptr + index); pkt_tag = get_unaligned_le16(ptr + index + 2); if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { RX_STAT_INC(skb_dropped); return; } pad_len = 4 - (pkt_len & 0x3); if (pad_len == 4) pad_len = 0; chk_idx = index; index = index + 4 + pkt_len + pad_len; if (index > MAX_RX_BUF_SIZE) { spin_lock(&hif_dev->rx_lock); hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; hif_dev->rx_transfer_len = MAX_RX_BUF_SIZE - chk_idx - 4; hif_dev->rx_pad_len = pad_len; nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); if (!nskb) { dev_err(&hif_dev->udev->dev, "ath9k_htc: RX memory allocation error\n"); spin_unlock(&hif_dev->rx_lock); goto err; } skb_reserve(nskb, 32); RX_STAT_INC(skb_allocated); memcpy(nskb->data, &(skb->data[chk_idx+4]), hif_dev->rx_transfer_len); /* Record the buffer pointer */ hif_dev->remain_skb = nskb; spin_unlock(&hif_dev->rx_lock); } else { nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); if (!nskb) { dev_err(&hif_dev->udev->dev, "ath9k_htc: RX memory allocation error\n"); goto err; } skb_reserve(nskb, 32); RX_STAT_INC(skb_allocated); memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); skb_put(nskb, pkt_len); skb_pool[pool_index++] = nskb; } } err: for (i = 0; i < pool_index; i++) { ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], skb_pool[i]->len, USB_WLAN_RX_PIPE); RX_STAT_INC(skb_completed); } } static void ath9k_hif_usb_rx_cb(struct urb *urb) { struct sk_buff *skb = (struct sk_buff *) urb->context; struct hif_device_usb *hif_dev = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); int ret; if (!skb) return; if (!hif_dev) goto free; switch (urb->status) { case 0: break; case -ENOENT: case -ECONNRESET: case -ENODEV: case -ESHUTDOWN: goto free; default: goto resubmit; } if (likely(urb->actual_length != 0)) { skb_put(skb, urb->actual_length); ath9k_hif_usb_rx_stream(hif_dev, skb); } resubmit: skb_reset_tail_pointer(skb); skb_trim(skb, 0); usb_anchor_urb(urb, &hif_dev->rx_submitted); ret = usb_submit_urb(urb, GFP_ATOMIC); if (ret) { usb_unanchor_urb(urb); goto free; } return; free: kfree_skb(skb); } static void ath9k_hif_usb_reg_in_cb(struct urb *urb) { struct sk_buff *skb = (struct sk_buff *) urb->context; struct sk_buff *nskb; struct hif_device_usb *hif_dev = usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); int ret; if (!skb) return; if (!hif_dev) goto free; switch (urb->status) { case 0: break; case -ENOENT: case -ECONNRESET: case -ENODEV: case -ESHUTDOWN: goto free; default: skb_reset_tail_pointer(skb); skb_trim(skb, 0); goto resubmit; } if (likely(urb->actual_length != 0)) { skb_put(skb, urb->actual_length); /* Process the command first */ ath9k_htc_rx_msg(hif_dev->htc_handle, skb, skb->len, USB_REG_IN_PIPE); nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); if (!nskb) { dev_err(&hif_dev->udev->dev, "ath9k_htc: REG_IN memory allocation failure\n"); urb->context = NULL; return; } usb_fill_bulk_urb(urb, hif_dev->udev, usb_rcvbulkpipe(hif_dev->udev, USB_REG_IN_PIPE), nskb->data, MAX_REG_IN_BUF_SIZE, ath9k_hif_usb_reg_in_cb, nskb); } resubmit: usb_anchor_urb(urb, &hif_dev->reg_in_submitted); ret = usb_submit_urb(urb, GFP_ATOMIC); if (ret) { usb_unanchor_urb(urb); goto free; } return; free: kfree_skb(skb); urb->context = NULL; } static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) { struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; unsigned long flags; list_for_each_entry_safe(tx_buf, tx_buf_tmp, &hif_dev->tx.tx_buf, list) { usb_kill_urb(tx_buf->urb); list_del(&tx_buf->list); usb_free_urb(tx_buf->urb); kfree(tx_buf->buf); kfree(tx_buf); } spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); hif_dev->tx.flags |= HIF_USB_TX_FLUSH; spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); list_for_each_entry_safe(tx_buf, tx_buf_tmp, &hif_dev->tx.tx_pending, list) { usb_kill_urb(tx_buf->urb); list_del(&tx_buf->list); usb_free_urb(tx_buf->urb); kfree(tx_buf->buf); kfree(tx_buf); } usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); } static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) { struct tx_buf *tx_buf; int i; INIT_LIST_HEAD(&hif_dev->tx.tx_buf); INIT_LIST_HEAD(&hif_dev->tx.tx_pending); spin_lock_init(&hif_dev->tx.tx_lock); __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); init_usb_anchor(&hif_dev->mgmt_submitted); for (i = 0; i < MAX_TX_URB_NUM; i++) { tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL); if (!tx_buf) goto err; tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); if (!tx_buf->buf) goto err; tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); if (!tx_buf->urb) goto err; tx_buf->hif_dev = hif_dev; __skb_queue_head_init(&tx_buf->skb_queue); list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); } hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; return 0; err: if (tx_buf) { kfree(tx_buf->buf); kfree(tx_buf); } ath9k_hif_usb_dealloc_tx_urbs(hif_dev); return -ENOMEM; } static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) { usb_kill_anchored_urbs(&hif_dev->rx_submitted); } static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) { struct urb *urb = NULL; struct sk_buff *skb = NULL; int i, ret; init_usb_anchor(&hif_dev->rx_submitted); spin_lock_init(&hif_dev->rx_lock); for (i = 0; i < MAX_RX_URB_NUM; i++) { /* Allocate URB */ urb = usb_alloc_urb(0, GFP_KERNEL); if (urb == NULL) { ret = -ENOMEM; goto err_urb; } /* Allocate buffer */ skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); if (!skb) { ret = -ENOMEM; goto err_skb; } usb_fill_bulk_urb(urb, hif_dev->udev, usb_rcvbulkpipe(hif_dev->udev, USB_WLAN_RX_PIPE), skb->data, MAX_RX_BUF_SIZE, ath9k_hif_usb_rx_cb, skb); /* Anchor URB */ usb_anchor_urb(urb, &hif_dev->rx_submitted); /* Submit URB */ ret = usb_submit_urb(urb, GFP_KERNEL); if (ret) { usb_unanchor_urb(urb); goto err_submit; } /* * Drop reference count. * This ensures that the URB is freed when killing them. */ usb_free_urb(urb); } return 0; err_submit: kfree_skb(skb); err_skb: usb_free_urb(urb); err_urb: ath9k_hif_usb_dealloc_rx_urbs(hif_dev); return ret; } static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) { usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); } static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) { struct urb *urb = NULL; struct sk_buff *skb = NULL; int i, ret; init_usb_anchor(&hif_dev->reg_in_submitted); for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { /* Allocate URB */ urb = usb_alloc_urb(0, GFP_KERNEL); if (urb == NULL) { ret = -ENOMEM; goto err_urb; } /* Allocate buffer */ skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); if (!skb) { ret = -ENOMEM; goto err_skb; } usb_fill_bulk_urb(urb, hif_dev->udev, usb_rcvbulkpipe(hif_dev->udev, USB_REG_IN_PIPE), skb->data, MAX_REG_IN_BUF_SIZE, ath9k_hif_usb_reg_in_cb, skb); /* Anchor URB */ usb_anchor_urb(urb, &hif_dev->reg_in_submitted); /* Submit URB */ ret = usb_submit_urb(urb, GFP_KERNEL); if (ret) { usb_unanchor_urb(urb); goto err_submit; } /* * Drop reference count. * This ensures that the URB is freed when killing them. */ usb_free_urb(urb); } return 0; err_submit: kfree_skb(skb); err_skb: usb_free_urb(urb); err_urb: ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); return ret; } static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) { /* Register Write */ init_usb_anchor(&hif_dev->regout_submitted); /* TX */ if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) goto err; /* RX */ if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) goto err_rx; /* Register Read */ if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) goto err_reg; return 0; err_reg: ath9k_hif_usb_dealloc_rx_urbs(hif_dev); err_rx: ath9k_hif_usb_dealloc_tx_urbs(hif_dev); err: return -ENOMEM; } static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) { usb_kill_anchored_urbs(&hif_dev->regout_submitted); ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); ath9k_hif_usb_dealloc_tx_urbs(hif_dev); ath9k_hif_usb_dealloc_rx_urbs(hif_dev); } static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev, u32 drv_info) { int transfer, err; const void *data = hif_dev->firmware->data; size_t len = hif_dev->firmware->size; u32 addr = AR9271_FIRMWARE; u8 *buf = kzalloc(4096, GFP_KERNEL); u32 firm_offset; if (!buf) return -ENOMEM; while (len) { transfer = min_t(int, len, 4096); memcpy(buf, data, transfer); err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, addr >> 8, 0, buf, transfer, HZ); if (err < 0) { kfree(buf); return err; } len -= transfer; data += transfer; addr += transfer; } kfree(buf); if (IS_AR7010_DEVICE(drv_info)) firm_offset = AR7010_FIRMWARE_TEXT; else firm_offset = AR9271_FIRMWARE_TEXT; /* * Issue FW download complete command to firmware. */ err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), FIRMWARE_DOWNLOAD_COMP, 0x40 | USB_DIR_OUT, firm_offset >> 8, 0, NULL, 0, HZ); if (err) return -EIO; dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", hif_dev->fw_name, (unsigned long) hif_dev->firmware->size); return 0; } static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info) { int ret, idx; struct usb_host_interface *alt = &hif_dev->interface->altsetting[0]; struct usb_endpoint_descriptor *endp; /* Request firmware */ ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name, &hif_dev->udev->dev); if (ret) { dev_err(&hif_dev->udev->dev, "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name); goto err_fw_req; } /* Download firmware */ ret = ath9k_hif_usb_download_fw(hif_dev, drv_info); if (ret) { dev_err(&hif_dev->udev->dev, "ath9k_htc: Firmware - %s download failed\n", hif_dev->fw_name); goto err_fw_download; } /* On downloading the firmware to the target, the USB descriptor of EP4 * is 'patched' to change the type of the endpoint to Bulk. This will * bring down CPU usage during the scan period. */ for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) { endp = &alt->endpoint[idx].desc; if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) { endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK; endp->bmAttributes |= USB_ENDPOINT_XFER_BULK; endp->bInterval = 0; } } /* Alloc URBs */ ret = ath9k_hif_usb_alloc_urbs(hif_dev); if (ret) { dev_err(&hif_dev->udev->dev, "ath9k_htc: Unable to allocate URBs\n"); goto err_fw_download; } return 0; err_fw_download: release_firmware(hif_dev->firmware); err_fw_req: hif_dev->firmware = NULL; return ret; } static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) { ath9k_hif_usb_dealloc_urbs(hif_dev); if (hif_dev->firmware) release_firmware(hif_dev->firmware); } /* * An exact copy of the function from zd1211rw. */ static int send_eject_command(struct usb_interface *interface) { struct usb_device *udev = interface_to_usbdev(interface); struct usb_host_interface *iface_desc = &interface->altsetting[0]; struct usb_endpoint_descriptor *endpoint; unsigned char *cmd; u8 bulk_out_ep; int r; /* Find bulk out endpoint */ for (r = 1; r >= 0; r--) { endpoint = &iface_desc->endpoint[r].desc; if (usb_endpoint_dir_out(endpoint) && usb_endpoint_xfer_bulk(endpoint)) { bulk_out_ep = endpoint->bEndpointAddress; break; } } if (r == -1) { dev_err(&udev->dev, "ath9k_htc: Could not find bulk out endpoint\n"); return -ENODEV; } cmd = kzalloc(31, GFP_KERNEL); if (cmd == NULL) return -ENODEV; /* USB bulk command block */ cmd[0] = 0x55; /* bulk command signature */ cmd[1] = 0x53; /* bulk command signature */ cmd[2] = 0x42; /* bulk command signature */ cmd[3] = 0x43; /* bulk command signature */ cmd[14] = 6; /* command length */ cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ cmd[19] = 0x2; /* eject disc */ dev_info(&udev->dev, "Ejecting storage device...\n"); r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), cmd, 31, NULL, 2000); kfree(cmd); if (r) return r; /* At this point, the device disconnects and reconnects with the real * ID numbers. */ usb_set_intfdata(interface, NULL); return 0; } static int ath9k_hif_usb_probe(struct usb_interface *interface, const struct usb_device_id *id) { struct usb_device *udev = interface_to_usbdev(interface); struct hif_device_usb *hif_dev; int ret = 0; if (id->driver_info == STORAGE_DEVICE) return send_eject_command(interface); hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); if (!hif_dev) { ret = -ENOMEM; goto err_alloc; } usb_get_dev(udev); hif_dev->udev = udev; hif_dev->interface = interface; hif_dev->device_id = id->idProduct; #ifdef CONFIG_PM udev->reset_resume = 1; #endif usb_set_intfdata(interface, hif_dev); hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, &hif_dev->udev->dev); if (hif_dev->htc_handle == NULL) { ret = -ENOMEM; goto err_htc_hw_alloc; } /* Find out which firmware to load */ if (IS_AR7010_DEVICE(id->driver_info)) hif_dev->fw_name = FIRMWARE_AR7010_1_1; else hif_dev->fw_name = FIRMWARE_AR9271; ret = ath9k_hif_usb_dev_init(hif_dev, id->driver_info); if (ret) { ret = -EINVAL; goto err_hif_init_usb; } ret = ath9k_htc_hw_init(hif_dev->htc_handle, &interface->dev, hif_dev->device_id, hif_dev->udev->product, id->driver_info); if (ret) { ret = -EINVAL; goto err_htc_hw_init; } dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n"); return 0; err_htc_hw_init: ath9k_hif_usb_dev_deinit(hif_dev); err_hif_init_usb: ath9k_htc_hw_free(hif_dev->htc_handle); err_htc_hw_alloc: usb_set_intfdata(interface, NULL); kfree(hif_dev); usb_put_dev(udev); err_alloc: return ret; } static void ath9k_hif_usb_reboot(struct usb_device *udev) { u32 reboot_cmd = 0xffffffff; void *buf; int ret; buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); if (!buf) return; ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE), buf, 4, NULL, HZ); if (ret) dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); kfree(buf); } static void ath9k_hif_usb_disconnect(struct usb_interface *interface) { struct usb_device *udev = interface_to_usbdev(interface); struct hif_device_usb *hif_dev = usb_get_intfdata(interface); bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; if (!hif_dev) return; ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); ath9k_htc_hw_free(hif_dev->htc_handle); ath9k_hif_usb_dev_deinit(hif_dev); usb_set_intfdata(interface, NULL); if (!unplugged && (hif_dev->flags & HIF_USB_START)) ath9k_hif_usb_reboot(udev); kfree(hif_dev); dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); usb_put_dev(udev); } #ifdef CONFIG_PM static int ath9k_hif_usb_suspend(struct usb_interface *interface, pm_message_t message) { struct hif_device_usb *hif_dev = usb_get_intfdata(interface); /* * The device has to be set to FULLSLEEP mode in case no * interface is up. */ if (!(hif_dev->flags & HIF_USB_START)) ath9k_htc_suspend(hif_dev->htc_handle); ath9k_hif_usb_dealloc_urbs(hif_dev); return 0; } static int ath9k_hif_usb_resume(struct usb_interface *interface) { struct hif_device_usb *hif_dev = usb_get_intfdata(interface); struct htc_target *htc_handle = hif_dev->htc_handle; int ret; ret = ath9k_hif_usb_alloc_urbs(hif_dev); if (ret) return ret; if (hif_dev->firmware) { ret = ath9k_hif_usb_download_fw(hif_dev, htc_handle->drv_priv->ah->hw_version.usbdev); if (ret) goto fail_resume; } else { ath9k_hif_usb_dealloc_urbs(hif_dev); return -EIO; } mdelay(100); ret = ath9k_htc_resume(htc_handle); if (ret) goto fail_resume; return 0; fail_resume: ath9k_hif_usb_dealloc_urbs(hif_dev); return ret; } #endif static struct usb_driver ath9k_hif_usb_driver = { .name = KBUILD_MODNAME, .probe = ath9k_hif_usb_probe, .disconnect = ath9k_hif_usb_disconnect, #ifdef CONFIG_PM .suspend = ath9k_hif_usb_suspend, .resume = ath9k_hif_usb_resume, .reset_resume = ath9k_hif_usb_resume, #endif .id_table = ath9k_hif_usb_ids, .soft_unbind = 1, }; int ath9k_hif_usb_init(void) { return usb_register(&ath9k_hif_usb_driver); } void ath9k_hif_usb_exit(void) { usb_deregister(&ath9k_hif_usb_driver); }