diff options
Diffstat (limited to 'kernel/drivers/net/wireless/ath/ath6kl/usb.c')
| -rw-r--r-- | kernel/drivers/net/wireless/ath/ath6kl/usb.c | 1239 |
1 files changed, 1239 insertions, 0 deletions
diff --git a/kernel/drivers/net/wireless/ath/ath6kl/usb.c b/kernel/drivers/net/wireless/ath/ath6kl/usb.c new file mode 100644 index 000000000..9da3594fd --- /dev/null +++ b/kernel/drivers/net/wireless/ath/ath6kl/usb.c @@ -0,0 +1,1239 @@ +/* + * Copyright (c) 2007-2011 Atheros Communications Inc. + * Copyright (c) 2011-2012 Qualcomm Atheros, 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 <linux/module.h> +#include <linux/usb.h> + +#include "debug.h" +#include "core.h" + +/* constants */ +#define TX_URB_COUNT 32 +#define RX_URB_COUNT 32 +#define ATH6KL_USB_RX_BUFFER_SIZE 4096 + +/* tx/rx pipes for usb */ +enum ATH6KL_USB_PIPE_ID { + ATH6KL_USB_PIPE_TX_CTRL = 0, + ATH6KL_USB_PIPE_TX_DATA_LP, + ATH6KL_USB_PIPE_TX_DATA_MP, + ATH6KL_USB_PIPE_TX_DATA_HP, + ATH6KL_USB_PIPE_RX_CTRL, + ATH6KL_USB_PIPE_RX_DATA, + ATH6KL_USB_PIPE_RX_DATA2, + ATH6KL_USB_PIPE_RX_INT, + ATH6KL_USB_PIPE_MAX +}; + +#define ATH6KL_USB_PIPE_INVALID ATH6KL_USB_PIPE_MAX + +struct ath6kl_usb_pipe { + struct list_head urb_list_head; + struct usb_anchor urb_submitted; + u32 urb_alloc; + u32 urb_cnt; + u32 urb_cnt_thresh; + unsigned int usb_pipe_handle; + u32 flags; + u8 ep_address; + u8 logical_pipe_num; + struct ath6kl_usb *ar_usb; + u16 max_packet_size; + struct work_struct io_complete_work; + struct sk_buff_head io_comp_queue; + struct usb_endpoint_descriptor *ep_desc; +}; + +#define ATH6KL_USB_PIPE_FLAG_TX (1 << 0) + +/* usb device object */ +struct ath6kl_usb { + /* protects pipe->urb_list_head and pipe->urb_cnt */ + spinlock_t cs_lock; + + struct usb_device *udev; + struct usb_interface *interface; + struct ath6kl_usb_pipe pipes[ATH6KL_USB_PIPE_MAX]; + u8 *diag_cmd_buffer; + u8 *diag_resp_buffer; + struct ath6kl *ar; +}; + +/* usb urb object */ +struct ath6kl_urb_context { + struct list_head link; + struct ath6kl_usb_pipe *pipe; + struct sk_buff *skb; + struct ath6kl *ar; +}; + +/* USB endpoint definitions */ +#define ATH6KL_USB_EP_ADDR_APP_CTRL_IN 0x81 +#define ATH6KL_USB_EP_ADDR_APP_DATA_IN 0x82 +#define ATH6KL_USB_EP_ADDR_APP_DATA2_IN 0x83 +#define ATH6KL_USB_EP_ADDR_APP_INT_IN 0x84 + +#define ATH6KL_USB_EP_ADDR_APP_CTRL_OUT 0x01 +#define ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT 0x02 +#define ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT 0x03 +#define ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT 0x04 + +/* diagnostic command defnitions */ +#define ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD 1 +#define ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP 2 +#define ATH6KL_USB_CONTROL_REQ_DIAG_CMD 3 +#define ATH6KL_USB_CONTROL_REQ_DIAG_RESP 4 + +#define ATH6KL_USB_CTRL_DIAG_CC_READ 0 +#define ATH6KL_USB_CTRL_DIAG_CC_WRITE 1 + +struct ath6kl_usb_ctrl_diag_cmd_write { + __le32 cmd; + __le32 address; + __le32 value; + __le32 _pad[1]; +} __packed; + +struct ath6kl_usb_ctrl_diag_cmd_read { + __le32 cmd; + __le32 address; +} __packed; + +struct ath6kl_usb_ctrl_diag_resp_read { + __le32 value; +} __packed; + +/* function declarations */ +static void ath6kl_usb_recv_complete(struct urb *urb); + +#define ATH6KL_USB_IS_BULK_EP(attr) (((attr) & 3) == 0x02) +#define ATH6KL_USB_IS_INT_EP(attr) (((attr) & 3) == 0x03) +#define ATH6KL_USB_IS_ISOC_EP(attr) (((attr) & 3) == 0x01) +#define ATH6KL_USB_IS_DIR_IN(addr) ((addr) & 0x80) + +/* pipe/urb operations */ +static struct ath6kl_urb_context * +ath6kl_usb_alloc_urb_from_pipe(struct ath6kl_usb_pipe *pipe) +{ + struct ath6kl_urb_context *urb_context = NULL; + unsigned long flags; + + spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags); + if (!list_empty(&pipe->urb_list_head)) { + urb_context = + list_first_entry(&pipe->urb_list_head, + struct ath6kl_urb_context, link); + list_del(&urb_context->link); + pipe->urb_cnt--; + } + spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags); + + return urb_context; +} + +static void ath6kl_usb_free_urb_to_pipe(struct ath6kl_usb_pipe *pipe, + struct ath6kl_urb_context *urb_context) +{ + unsigned long flags; + + spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags); + pipe->urb_cnt++; + + list_add(&urb_context->link, &pipe->urb_list_head); + spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags); +} + +static void ath6kl_usb_cleanup_recv_urb(struct ath6kl_urb_context *urb_context) +{ + dev_kfree_skb(urb_context->skb); + urb_context->skb = NULL; + + ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context); +} + +static inline struct ath6kl_usb *ath6kl_usb_priv(struct ath6kl *ar) +{ + return ar->hif_priv; +} + +/* pipe resource allocation/cleanup */ +static int ath6kl_usb_alloc_pipe_resources(struct ath6kl_usb_pipe *pipe, + int urb_cnt) +{ + struct ath6kl_urb_context *urb_context; + int status = 0, i; + + INIT_LIST_HEAD(&pipe->urb_list_head); + init_usb_anchor(&pipe->urb_submitted); + + for (i = 0; i < urb_cnt; i++) { + urb_context = kzalloc(sizeof(struct ath6kl_urb_context), + GFP_KERNEL); + if (urb_context == NULL) { + status = -ENOMEM; + goto fail_alloc_pipe_resources; + } + + urb_context->pipe = pipe; + + /* + * we are only allocate the urb contexts here, the actual URB + * is allocated from the kernel as needed to do a transaction + */ + pipe->urb_alloc++; + ath6kl_usb_free_urb_to_pipe(pipe, urb_context); + } + + ath6kl_dbg(ATH6KL_DBG_USB, + "ath6kl usb: alloc resources lpipe:%d hpipe:0x%X urbs:%d\n", + pipe->logical_pipe_num, pipe->usb_pipe_handle, + pipe->urb_alloc); + +fail_alloc_pipe_resources: + return status; +} + +static void ath6kl_usb_free_pipe_resources(struct ath6kl_usb_pipe *pipe) +{ + struct ath6kl_urb_context *urb_context; + + if (pipe->ar_usb == NULL) { + /* nothing allocated for this pipe */ + return; + } + + ath6kl_dbg(ATH6KL_DBG_USB, + "ath6kl usb: free resources lpipe:%d" + "hpipe:0x%X urbs:%d avail:%d\n", + pipe->logical_pipe_num, pipe->usb_pipe_handle, + pipe->urb_alloc, pipe->urb_cnt); + + if (pipe->urb_alloc != pipe->urb_cnt) { + ath6kl_dbg(ATH6KL_DBG_USB, + "ath6kl usb: urb leak! lpipe:%d" + "hpipe:0x%X urbs:%d avail:%d\n", + pipe->logical_pipe_num, pipe->usb_pipe_handle, + pipe->urb_alloc, pipe->urb_cnt); + } + + while (true) { + urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe); + if (urb_context == NULL) + break; + kfree(urb_context); + } +} + +static void ath6kl_usb_cleanup_pipe_resources(struct ath6kl_usb *ar_usb) +{ + int i; + + for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) + ath6kl_usb_free_pipe_resources(&ar_usb->pipes[i]); +} + +static u8 ath6kl_usb_get_logical_pipe_num(struct ath6kl_usb *ar_usb, + u8 ep_address, int *urb_count) +{ + u8 pipe_num = ATH6KL_USB_PIPE_INVALID; + + switch (ep_address) { + case ATH6KL_USB_EP_ADDR_APP_CTRL_IN: + pipe_num = ATH6KL_USB_PIPE_RX_CTRL; + *urb_count = RX_URB_COUNT; + break; + case ATH6KL_USB_EP_ADDR_APP_DATA_IN: + pipe_num = ATH6KL_USB_PIPE_RX_DATA; + *urb_count = RX_URB_COUNT; + break; + case ATH6KL_USB_EP_ADDR_APP_INT_IN: + pipe_num = ATH6KL_USB_PIPE_RX_INT; + *urb_count = RX_URB_COUNT; + break; + case ATH6KL_USB_EP_ADDR_APP_DATA2_IN: + pipe_num = ATH6KL_USB_PIPE_RX_DATA2; + *urb_count = RX_URB_COUNT; + break; + case ATH6KL_USB_EP_ADDR_APP_CTRL_OUT: + pipe_num = ATH6KL_USB_PIPE_TX_CTRL; + *urb_count = TX_URB_COUNT; + break; + case ATH6KL_USB_EP_ADDR_APP_DATA_LP_OUT: + pipe_num = ATH6KL_USB_PIPE_TX_DATA_LP; + *urb_count = TX_URB_COUNT; + break; + case ATH6KL_USB_EP_ADDR_APP_DATA_MP_OUT: + pipe_num = ATH6KL_USB_PIPE_TX_DATA_MP; + *urb_count = TX_URB_COUNT; + break; + case ATH6KL_USB_EP_ADDR_APP_DATA_HP_OUT: + pipe_num = ATH6KL_USB_PIPE_TX_DATA_HP; + *urb_count = TX_URB_COUNT; + break; + default: + /* note: there may be endpoints not currently used */ + break; + } + + return pipe_num; +} + +static int ath6kl_usb_setup_pipe_resources(struct ath6kl_usb *ar_usb) +{ + struct usb_interface *interface = ar_usb->interface; + struct usb_host_interface *iface_desc = interface->cur_altsetting; + struct usb_endpoint_descriptor *endpoint; + struct ath6kl_usb_pipe *pipe; + int i, urbcount, status = 0; + u8 pipe_num; + + ath6kl_dbg(ATH6KL_DBG_USB, "setting up USB Pipes using interface\n"); + + /* walk decriptors and setup pipes */ + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + + if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) { + ath6kl_dbg(ATH6KL_DBG_USB, + "%s Bulk Ep:0x%2.2X maxpktsz:%d\n", + ATH6KL_USB_IS_DIR_IN + (endpoint->bEndpointAddress) ? + "RX" : "TX", endpoint->bEndpointAddress, + le16_to_cpu(endpoint->wMaxPacketSize)); + } else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) { + ath6kl_dbg(ATH6KL_DBG_USB, + "%s Int Ep:0x%2.2X maxpktsz:%d interval:%d\n", + ATH6KL_USB_IS_DIR_IN + (endpoint->bEndpointAddress) ? + "RX" : "TX", endpoint->bEndpointAddress, + le16_to_cpu(endpoint->wMaxPacketSize), + endpoint->bInterval); + } else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) { + /* TODO for ISO */ + ath6kl_dbg(ATH6KL_DBG_USB, + "%s ISOC Ep:0x%2.2X maxpktsz:%d interval:%d\n", + ATH6KL_USB_IS_DIR_IN + (endpoint->bEndpointAddress) ? + "RX" : "TX", endpoint->bEndpointAddress, + le16_to_cpu(endpoint->wMaxPacketSize), + endpoint->bInterval); + } + urbcount = 0; + + pipe_num = + ath6kl_usb_get_logical_pipe_num(ar_usb, + endpoint->bEndpointAddress, + &urbcount); + if (pipe_num == ATH6KL_USB_PIPE_INVALID) + continue; + + pipe = &ar_usb->pipes[pipe_num]; + if (pipe->ar_usb != NULL) { + /* hmmm..pipe was already setup */ + continue; + } + + pipe->ar_usb = ar_usb; + pipe->logical_pipe_num = pipe_num; + pipe->ep_address = endpoint->bEndpointAddress; + pipe->max_packet_size = le16_to_cpu(endpoint->wMaxPacketSize); + + if (ATH6KL_USB_IS_BULK_EP(endpoint->bmAttributes)) { + if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) { + pipe->usb_pipe_handle = + usb_rcvbulkpipe(ar_usb->udev, + pipe->ep_address); + } else { + pipe->usb_pipe_handle = + usb_sndbulkpipe(ar_usb->udev, + pipe->ep_address); + } + } else if (ATH6KL_USB_IS_INT_EP(endpoint->bmAttributes)) { + if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) { + pipe->usb_pipe_handle = + usb_rcvintpipe(ar_usb->udev, + pipe->ep_address); + } else { + pipe->usb_pipe_handle = + usb_sndintpipe(ar_usb->udev, + pipe->ep_address); + } + } else if (ATH6KL_USB_IS_ISOC_EP(endpoint->bmAttributes)) { + /* TODO for ISO */ + if (ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) { + pipe->usb_pipe_handle = + usb_rcvisocpipe(ar_usb->udev, + pipe->ep_address); + } else { + pipe->usb_pipe_handle = + usb_sndisocpipe(ar_usb->udev, + pipe->ep_address); + } + } + + pipe->ep_desc = endpoint; + + if (!ATH6KL_USB_IS_DIR_IN(pipe->ep_address)) + pipe->flags |= ATH6KL_USB_PIPE_FLAG_TX; + + status = ath6kl_usb_alloc_pipe_resources(pipe, urbcount); + if (status != 0) + break; + } + + return status; +} + +/* pipe operations */ +static void ath6kl_usb_post_recv_transfers(struct ath6kl_usb_pipe *recv_pipe, + int buffer_length) +{ + struct ath6kl_urb_context *urb_context; + struct urb *urb; + int usb_status; + + while (true) { + urb_context = ath6kl_usb_alloc_urb_from_pipe(recv_pipe); + if (urb_context == NULL) + break; + + urb_context->skb = dev_alloc_skb(buffer_length); + if (urb_context->skb == NULL) + goto err_cleanup_urb; + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (urb == NULL) + goto err_cleanup_urb; + + usb_fill_bulk_urb(urb, + recv_pipe->ar_usb->udev, + recv_pipe->usb_pipe_handle, + urb_context->skb->data, + buffer_length, + ath6kl_usb_recv_complete, urb_context); + + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "ath6kl usb: bulk recv submit:%d, 0x%X (ep:0x%2.2X), %d bytes buf:0x%p\n", + recv_pipe->logical_pipe_num, + recv_pipe->usb_pipe_handle, recv_pipe->ep_address, + buffer_length, urb_context->skb); + + usb_anchor_urb(urb, &recv_pipe->urb_submitted); + usb_status = usb_submit_urb(urb, GFP_ATOMIC); + + if (usb_status) { + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "ath6kl usb : usb bulk recv failed %d\n", + usb_status); + usb_unanchor_urb(urb); + usb_free_urb(urb); + goto err_cleanup_urb; + } + usb_free_urb(urb); + } + return; + +err_cleanup_urb: + ath6kl_usb_cleanup_recv_urb(urb_context); + return; +} + +static void ath6kl_usb_flush_all(struct ath6kl_usb *ar_usb) +{ + int i; + + for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) { + if (ar_usb->pipes[i].ar_usb != NULL) + usb_kill_anchored_urbs(&ar_usb->pipes[i].urb_submitted); + } + + /* + * Flushing any pending I/O may schedule work this call will block + * until all scheduled work runs to completion. + */ + flush_scheduled_work(); +} + +static void ath6kl_usb_start_recv_pipes(struct ath6kl_usb *ar_usb) +{ + /* + * note: control pipe is no longer used + * ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_cnt_thresh = + * ar_usb->pipes[ATH6KL_USB_PIPE_RX_CTRL].urb_alloc/2; + * ath6kl_usb_post_recv_transfers(&ar_usb-> + * pipes[ATH6KL_USB_PIPE_RX_CTRL], + * ATH6KL_USB_RX_BUFFER_SIZE); + */ + + ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA].urb_cnt_thresh = 1; + + ath6kl_usb_post_recv_transfers(&ar_usb->pipes[ATH6KL_USB_PIPE_RX_DATA], + ATH6KL_USB_RX_BUFFER_SIZE); +} + +/* hif usb rx/tx completion functions */ +static void ath6kl_usb_recv_complete(struct urb *urb) +{ + struct ath6kl_urb_context *urb_context = urb->context; + struct ath6kl_usb_pipe *pipe = urb_context->pipe; + struct sk_buff *skb = NULL; + int status = 0; + + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "%s: recv pipe: %d, stat:%d, len:%d urb:0x%p\n", __func__, + pipe->logical_pipe_num, urb->status, urb->actual_length, + urb); + + if (urb->status != 0) { + status = -EIO; + switch (urb->status) { + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* + * no need to spew these errors when device + * removed or urb killed due to driver shutdown + */ + status = -ECANCELED; + break; + default: + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "%s recv pipe: %d (ep:0x%2.2X), failed:%d\n", + __func__, pipe->logical_pipe_num, + pipe->ep_address, urb->status); + break; + } + goto cleanup_recv_urb; + } + + if (urb->actual_length == 0) + goto cleanup_recv_urb; + + skb = urb_context->skb; + + /* we are going to pass it up */ + urb_context->skb = NULL; + skb_put(skb, urb->actual_length); + + /* note: queue implements a lock */ + skb_queue_tail(&pipe->io_comp_queue, skb); + schedule_work(&pipe->io_complete_work); + +cleanup_recv_urb: + ath6kl_usb_cleanup_recv_urb(urb_context); + + if (status == 0 && + pipe->urb_cnt >= pipe->urb_cnt_thresh) { + /* our free urbs are piling up, post more transfers */ + ath6kl_usb_post_recv_transfers(pipe, ATH6KL_USB_RX_BUFFER_SIZE); + } +} + +static void ath6kl_usb_usb_transmit_complete(struct urb *urb) +{ + struct ath6kl_urb_context *urb_context = urb->context; + struct ath6kl_usb_pipe *pipe = urb_context->pipe; + struct sk_buff *skb; + + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "%s: pipe: %d, stat:%d, len:%d\n", + __func__, pipe->logical_pipe_num, urb->status, + urb->actual_length); + + if (urb->status != 0) { + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "%s: pipe: %d, failed:%d\n", + __func__, pipe->logical_pipe_num, urb->status); + } + + skb = urb_context->skb; + urb_context->skb = NULL; + ath6kl_usb_free_urb_to_pipe(urb_context->pipe, urb_context); + + /* note: queue implements a lock */ + skb_queue_tail(&pipe->io_comp_queue, skb); + schedule_work(&pipe->io_complete_work); +} + +static void ath6kl_usb_io_comp_work(struct work_struct *work) +{ + struct ath6kl_usb_pipe *pipe = container_of(work, + struct ath6kl_usb_pipe, + io_complete_work); + struct ath6kl_usb *ar_usb; + struct sk_buff *skb; + + ar_usb = pipe->ar_usb; + + while ((skb = skb_dequeue(&pipe->io_comp_queue))) { + if (pipe->flags & ATH6KL_USB_PIPE_FLAG_TX) { + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "ath6kl usb xmit callback buf:0x%p\n", skb); + ath6kl_core_tx_complete(ar_usb->ar, skb); + } else { + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "ath6kl usb recv callback buf:0x%p\n", skb); + ath6kl_core_rx_complete(ar_usb->ar, skb, + pipe->logical_pipe_num); + } + } +} + +#define ATH6KL_USB_MAX_DIAG_CMD (sizeof(struct ath6kl_usb_ctrl_diag_cmd_write)) +#define ATH6KL_USB_MAX_DIAG_RESP (sizeof(struct ath6kl_usb_ctrl_diag_resp_read)) + +static void ath6kl_usb_destroy(struct ath6kl_usb *ar_usb) +{ + ath6kl_usb_flush_all(ar_usb); + + ath6kl_usb_cleanup_pipe_resources(ar_usb); + + usb_set_intfdata(ar_usb->interface, NULL); + + kfree(ar_usb->diag_cmd_buffer); + kfree(ar_usb->diag_resp_buffer); + + kfree(ar_usb); +} + +static struct ath6kl_usb *ath6kl_usb_create(struct usb_interface *interface) +{ + struct usb_device *dev = interface_to_usbdev(interface); + struct ath6kl_usb *ar_usb; + struct ath6kl_usb_pipe *pipe; + int status = 0; + int i; + + ar_usb = kzalloc(sizeof(struct ath6kl_usb), GFP_KERNEL); + if (ar_usb == NULL) + goto fail_ath6kl_usb_create; + + usb_set_intfdata(interface, ar_usb); + spin_lock_init(&(ar_usb->cs_lock)); + ar_usb->udev = dev; + ar_usb->interface = interface; + + for (i = 0; i < ATH6KL_USB_PIPE_MAX; i++) { + pipe = &ar_usb->pipes[i]; + INIT_WORK(&pipe->io_complete_work, + ath6kl_usb_io_comp_work); + skb_queue_head_init(&pipe->io_comp_queue); + } + + ar_usb->diag_cmd_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_CMD, GFP_KERNEL); + if (ar_usb->diag_cmd_buffer == NULL) { + status = -ENOMEM; + goto fail_ath6kl_usb_create; + } + + ar_usb->diag_resp_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_RESP, + GFP_KERNEL); + if (ar_usb->diag_resp_buffer == NULL) { + status = -ENOMEM; + goto fail_ath6kl_usb_create; + } + + status = ath6kl_usb_setup_pipe_resources(ar_usb); + +fail_ath6kl_usb_create: + if (status != 0) { + ath6kl_usb_destroy(ar_usb); + ar_usb = NULL; + } + return ar_usb; +} + +static void ath6kl_usb_device_detached(struct usb_interface *interface) +{ + struct ath6kl_usb *ar_usb; + + ar_usb = usb_get_intfdata(interface); + if (ar_usb == NULL) + return; + + ath6kl_stop_txrx(ar_usb->ar); + + /* Delay to wait for the target to reboot */ + mdelay(20); + ath6kl_core_cleanup(ar_usb->ar); + ath6kl_usb_destroy(ar_usb); +} + +/* exported hif usb APIs for htc pipe */ +static void hif_start(struct ath6kl *ar) +{ + struct ath6kl_usb *device = ath6kl_usb_priv(ar); + int i; + + ath6kl_usb_start_recv_pipes(device); + + /* set the TX resource avail threshold for each TX pipe */ + for (i = ATH6KL_USB_PIPE_TX_CTRL; + i <= ATH6KL_USB_PIPE_TX_DATA_HP; i++) { + device->pipes[i].urb_cnt_thresh = + device->pipes[i].urb_alloc / 2; + } +} + +static int ath6kl_usb_send(struct ath6kl *ar, u8 PipeID, + struct sk_buff *hdr_skb, struct sk_buff *skb) +{ + struct ath6kl_usb *device = ath6kl_usb_priv(ar); + struct ath6kl_usb_pipe *pipe = &device->pipes[PipeID]; + struct ath6kl_urb_context *urb_context; + int usb_status, status = 0; + struct urb *urb; + u8 *data; + u32 len; + + ath6kl_dbg(ATH6KL_DBG_USB_BULK, "+%s pipe : %d, buf:0x%p\n", + __func__, PipeID, skb); + + urb_context = ath6kl_usb_alloc_urb_from_pipe(pipe); + + if (urb_context == NULL) { + /* + * TODO: it is possible to run out of urbs if + * 2 endpoints map to the same pipe ID + */ + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "%s pipe:%d no urbs left. URB Cnt : %d\n", + __func__, PipeID, pipe->urb_cnt); + status = -ENOMEM; + goto fail_hif_send; + } + + urb_context->skb = skb; + + data = skb->data; + len = skb->len; + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (urb == NULL) { + status = -ENOMEM; + ath6kl_usb_free_urb_to_pipe(urb_context->pipe, + urb_context); + goto fail_hif_send; + } + + usb_fill_bulk_urb(urb, + device->udev, + pipe->usb_pipe_handle, + data, + len, + ath6kl_usb_usb_transmit_complete, urb_context); + + if ((len % pipe->max_packet_size) == 0) { + /* hit a max packet boundary on this pipe */ + urb->transfer_flags |= URB_ZERO_PACKET; + } + + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "athusb bulk send submit:%d, 0x%X (ep:0x%2.2X), %d bytes\n", + pipe->logical_pipe_num, pipe->usb_pipe_handle, + pipe->ep_address, len); + + usb_anchor_urb(urb, &pipe->urb_submitted); + usb_status = usb_submit_urb(urb, GFP_ATOMIC); + + if (usb_status) { + ath6kl_dbg(ATH6KL_DBG_USB_BULK, + "ath6kl usb : usb bulk transmit failed %d\n", + usb_status); + usb_unanchor_urb(urb); + ath6kl_usb_free_urb_to_pipe(urb_context->pipe, + urb_context); + status = -EINVAL; + } + usb_free_urb(urb); + +fail_hif_send: + return status; +} + +static void hif_stop(struct ath6kl *ar) +{ + struct ath6kl_usb *device = ath6kl_usb_priv(ar); + + ath6kl_usb_flush_all(device); +} + +static void ath6kl_usb_get_default_pipe(struct ath6kl *ar, + u8 *ul_pipe, u8 *dl_pipe) +{ + *ul_pipe = ATH6KL_USB_PIPE_TX_CTRL; + *dl_pipe = ATH6KL_USB_PIPE_RX_CTRL; +} + +static int ath6kl_usb_map_service_pipe(struct ath6kl *ar, u16 svc_id, + u8 *ul_pipe, u8 *dl_pipe) +{ + int status = 0; + + switch (svc_id) { + case HTC_CTRL_RSVD_SVC: + case WMI_CONTROL_SVC: + *ul_pipe = ATH6KL_USB_PIPE_TX_CTRL; + /* due to large control packets, shift to data pipe */ + *dl_pipe = ATH6KL_USB_PIPE_RX_DATA; + break; + case WMI_DATA_BE_SVC: + case WMI_DATA_BK_SVC: + *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP; + /* + * Disable rxdata2 directly, it will be enabled + * if FW enable rxdata2 + */ + *dl_pipe = ATH6KL_USB_PIPE_RX_DATA; + break; + case WMI_DATA_VI_SVC: + + if (test_bit(ATH6KL_FW_CAPABILITY_MAP_LP_ENDPOINT, + ar->fw_capabilities)) + *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP; + else + *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP; + /* + * Disable rxdata2 directly, it will be enabled + * if FW enable rxdata2 + */ + *dl_pipe = ATH6KL_USB_PIPE_RX_DATA; + break; + case WMI_DATA_VO_SVC: + + if (test_bit(ATH6KL_FW_CAPABILITY_MAP_LP_ENDPOINT, + ar->fw_capabilities)) + *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_LP; + else + *ul_pipe = ATH6KL_USB_PIPE_TX_DATA_MP; + /* + * Disable rxdata2 directly, it will be enabled + * if FW enable rxdata2 + */ + *dl_pipe = ATH6KL_USB_PIPE_RX_DATA; + break; + default: + status = -EPERM; + break; + } + + return status; +} + +static u16 ath6kl_usb_get_free_queue_number(struct ath6kl *ar, u8 pipe_id) +{ + struct ath6kl_usb *device = ath6kl_usb_priv(ar); + + return device->pipes[pipe_id].urb_cnt; +} + +static void hif_detach_htc(struct ath6kl *ar) +{ + struct ath6kl_usb *device = ath6kl_usb_priv(ar); + + ath6kl_usb_flush_all(device); +} + +static int ath6kl_usb_submit_ctrl_out(struct ath6kl_usb *ar_usb, + u8 req, u16 value, u16 index, void *data, + u32 size) +{ + u8 *buf = NULL; + int ret; + + if (size > 0) { + buf = kmemdup(data, size, GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + } + + /* note: if successful returns number of bytes transfered */ + ret = usb_control_msg(ar_usb->udev, + usb_sndctrlpipe(ar_usb->udev, 0), + req, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_DEVICE, value, index, buf, + size, 1000); + + if (ret < 0) { + ath6kl_warn("Failed to submit usb control message: %d\n", ret); + kfree(buf); + return ret; + } + + kfree(buf); + + return 0; +} + +static int ath6kl_usb_submit_ctrl_in(struct ath6kl_usb *ar_usb, + u8 req, u16 value, u16 index, void *data, + u32 size) +{ + u8 *buf = NULL; + int ret; + + if (size > 0) { + buf = kmalloc(size, GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + } + + /* note: if successful returns number of bytes transfered */ + ret = usb_control_msg(ar_usb->udev, + usb_rcvctrlpipe(ar_usb->udev, 0), + req, + USB_DIR_IN | USB_TYPE_VENDOR | + USB_RECIP_DEVICE, value, index, buf, + size, 2 * HZ); + + if (ret < 0) { + ath6kl_warn("Failed to read usb control message: %d\n", ret); + kfree(buf); + return ret; + } + + memcpy((u8 *) data, buf, size); + + kfree(buf); + + return 0; +} + +static int ath6kl_usb_ctrl_msg_exchange(struct ath6kl_usb *ar_usb, + u8 req_val, u8 *req_buf, u32 req_len, + u8 resp_val, u8 *resp_buf, u32 *resp_len) +{ + int ret; + + /* send command */ + ret = ath6kl_usb_submit_ctrl_out(ar_usb, req_val, 0, 0, + req_buf, req_len); + + if (ret != 0) + return ret; + + if (resp_buf == NULL) { + /* no expected response */ + return ret; + } + + /* get response */ + ret = ath6kl_usb_submit_ctrl_in(ar_usb, resp_val, 0, 0, + resp_buf, *resp_len); + + return ret; +} + +static int ath6kl_usb_diag_read32(struct ath6kl *ar, u32 address, u32 *data) +{ + struct ath6kl_usb *ar_usb = ar->hif_priv; + struct ath6kl_usb_ctrl_diag_resp_read *resp; + struct ath6kl_usb_ctrl_diag_cmd_read *cmd; + u32 resp_len; + int ret; + + cmd = (struct ath6kl_usb_ctrl_diag_cmd_read *) ar_usb->diag_cmd_buffer; + + memset(cmd, 0, sizeof(*cmd)); + cmd->cmd = ATH6KL_USB_CTRL_DIAG_CC_READ; + cmd->address = cpu_to_le32(address); + resp_len = sizeof(*resp); + + ret = ath6kl_usb_ctrl_msg_exchange(ar_usb, + ATH6KL_USB_CONTROL_REQ_DIAG_CMD, + (u8 *) cmd, + sizeof(struct ath6kl_usb_ctrl_diag_cmd_write), + ATH6KL_USB_CONTROL_REQ_DIAG_RESP, + ar_usb->diag_resp_buffer, &resp_len); + + if (ret) { + ath6kl_warn("diag read32 failed: %d\n", ret); + return ret; + } + + resp = (struct ath6kl_usb_ctrl_diag_resp_read *) + ar_usb->diag_resp_buffer; + + *data = le32_to_cpu(resp->value); + + return ret; +} + +static int ath6kl_usb_diag_write32(struct ath6kl *ar, u32 address, __le32 data) +{ + struct ath6kl_usb *ar_usb = ar->hif_priv; + struct ath6kl_usb_ctrl_diag_cmd_write *cmd; + int ret; + + cmd = (struct ath6kl_usb_ctrl_diag_cmd_write *) ar_usb->diag_cmd_buffer; + + memset(cmd, 0, sizeof(struct ath6kl_usb_ctrl_diag_cmd_write)); + cmd->cmd = cpu_to_le32(ATH6KL_USB_CTRL_DIAG_CC_WRITE); + cmd->address = cpu_to_le32(address); + cmd->value = data; + + ret = ath6kl_usb_ctrl_msg_exchange(ar_usb, + ATH6KL_USB_CONTROL_REQ_DIAG_CMD, + (u8 *) cmd, + sizeof(*cmd), + 0, NULL, NULL); + if (ret) { + ath6kl_warn("diag_write32 failed: %d\n", ret); + return ret; + } + + return 0; +} + +static int ath6kl_usb_bmi_read(struct ath6kl *ar, u8 *buf, u32 len) +{ + struct ath6kl_usb *ar_usb = ar->hif_priv; + int ret; + + /* get response */ + ret = ath6kl_usb_submit_ctrl_in(ar_usb, + ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP, + 0, 0, buf, len); + if (ret) { + ath6kl_err("Unable to read the bmi data from the device: %d\n", + ret); + return ret; + } + + return 0; +} + +static int ath6kl_usb_bmi_write(struct ath6kl *ar, u8 *buf, u32 len) +{ + struct ath6kl_usb *ar_usb = ar->hif_priv; + int ret; + + /* send command */ + ret = ath6kl_usb_submit_ctrl_out(ar_usb, + ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD, + 0, 0, buf, len); + if (ret) { + ath6kl_err("unable to send the bmi data to the device: %d\n", + ret); + return ret; + } + + return 0; +} + +static int ath6kl_usb_power_on(struct ath6kl *ar) +{ + hif_start(ar); + return 0; +} + +static int ath6kl_usb_power_off(struct ath6kl *ar) +{ + hif_detach_htc(ar); + return 0; +} + +static void ath6kl_usb_stop(struct ath6kl *ar) +{ + hif_stop(ar); +} + +static void ath6kl_usb_cleanup_scatter(struct ath6kl *ar) +{ + /* + * USB doesn't support it. Just return. + */ + return; +} + +static int ath6kl_usb_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow) +{ + /* + * cfg80211 suspend/WOW currently not supported for USB. + */ + return 0; +} + +static int ath6kl_usb_resume(struct ath6kl *ar) +{ + /* + * cfg80211 resume currently not supported for USB. + */ + return 0; +} + +static const struct ath6kl_hif_ops ath6kl_usb_ops = { + .diag_read32 = ath6kl_usb_diag_read32, + .diag_write32 = ath6kl_usb_diag_write32, + .bmi_read = ath6kl_usb_bmi_read, + .bmi_write = ath6kl_usb_bmi_write, + .power_on = ath6kl_usb_power_on, + .power_off = ath6kl_usb_power_off, + .stop = ath6kl_usb_stop, + .pipe_send = ath6kl_usb_send, + .pipe_get_default = ath6kl_usb_get_default_pipe, + .pipe_map_service = ath6kl_usb_map_service_pipe, + .pipe_get_free_queue_number = ath6kl_usb_get_free_queue_number, + .cleanup_scatter = ath6kl_usb_cleanup_scatter, + .suspend = ath6kl_usb_suspend, + .resume = ath6kl_usb_resume, +}; + +/* ath6kl usb driver registered functions */ +static int ath6kl_usb_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev(interface); + struct ath6kl *ar; + struct ath6kl_usb *ar_usb = NULL; + int vendor_id, product_id; + int ret = 0; + + usb_get_dev(dev); + + vendor_id = le16_to_cpu(dev->descriptor.idVendor); + product_id = le16_to_cpu(dev->descriptor.idProduct); + + ath6kl_dbg(ATH6KL_DBG_USB, "vendor_id = %04x\n", vendor_id); + ath6kl_dbg(ATH6KL_DBG_USB, "product_id = %04x\n", product_id); + + if (interface->cur_altsetting) + ath6kl_dbg(ATH6KL_DBG_USB, "USB Interface %d\n", + interface->cur_altsetting->desc.bInterfaceNumber); + + + if (dev->speed == USB_SPEED_HIGH) + ath6kl_dbg(ATH6KL_DBG_USB, "USB 2.0 Host\n"); + else + ath6kl_dbg(ATH6KL_DBG_USB, "USB 1.1 Host\n"); + + ar_usb = ath6kl_usb_create(interface); + + if (ar_usb == NULL) { + ret = -ENOMEM; + goto err_usb_put; + } + + ar = ath6kl_core_create(&ar_usb->udev->dev); + if (ar == NULL) { + ath6kl_err("Failed to alloc ath6kl core\n"); + ret = -ENOMEM; + goto err_usb_destroy; + } + + ar->hif_priv = ar_usb; + ar->hif_type = ATH6KL_HIF_TYPE_USB; + ar->hif_ops = &ath6kl_usb_ops; + ar->mbox_info.block_size = 16; + ar->bmi.max_data_size = 252; + + ar_usb->ar = ar; + + ret = ath6kl_core_init(ar, ATH6KL_HTC_TYPE_PIPE); + if (ret) { + ath6kl_err("Failed to init ath6kl core: %d\n", ret); + goto err_core_free; + } + + return ret; + +err_core_free: + ath6kl_core_destroy(ar); +err_usb_destroy: + ath6kl_usb_destroy(ar_usb); +err_usb_put: + usb_put_dev(dev); + + return ret; +} + +static void ath6kl_usb_remove(struct usb_interface *interface) +{ + usb_put_dev(interface_to_usbdev(interface)); + ath6kl_usb_device_detached(interface); +} + +#ifdef CONFIG_PM + +static int ath6kl_usb_pm_suspend(struct usb_interface *interface, + pm_message_t message) +{ + struct ath6kl_usb *device; + device = usb_get_intfdata(interface); + + ath6kl_usb_flush_all(device); + return 0; +} + +static int ath6kl_usb_pm_resume(struct usb_interface *interface) +{ + struct ath6kl_usb *device; + device = usb_get_intfdata(interface); + + ath6kl_usb_post_recv_transfers(&device->pipes[ATH6KL_USB_PIPE_RX_DATA], + ATH6KL_USB_RX_BUFFER_SIZE); + ath6kl_usb_post_recv_transfers(&device->pipes[ATH6KL_USB_PIPE_RX_DATA2], + ATH6KL_USB_RX_BUFFER_SIZE); + + return 0; +} + +#else + +#define ath6kl_usb_pm_suspend NULL +#define ath6kl_usb_pm_resume NULL + +#endif + +/* table of devices that work with this driver */ +static struct usb_device_id ath6kl_usb_ids[] = { + {USB_DEVICE(0x0cf3, 0x9375)}, + {USB_DEVICE(0x0cf3, 0x9374)}, + { /* Terminating entry */ }, +}; + +MODULE_DEVICE_TABLE(usb, ath6kl_usb_ids); + +static struct usb_driver ath6kl_usb_driver = { + .name = "ath6kl_usb", + .probe = ath6kl_usb_probe, + .suspend = ath6kl_usb_pm_suspend, + .resume = ath6kl_usb_pm_resume, + .disconnect = ath6kl_usb_remove, + .id_table = ath6kl_usb_ids, + .supports_autosuspend = true, + .disable_hub_initiated_lpm = 1, +}; + +module_usb_driver(ath6kl_usb_driver); + +MODULE_AUTHOR("Atheros Communications, Inc."); +MODULE_DESCRIPTION("Driver support for Atheros AR600x USB devices"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_FIRMWARE(AR6004_HW_1_0_FIRMWARE_FILE); +MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6004_HW_1_1_FIRMWARE_FILE); +MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6004_HW_1_2_FIRMWARE_FILE); +MODULE_FIRMWARE(AR6004_HW_1_2_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6004_HW_1_2_DEFAULT_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6004_HW_1_3_FW_DIR "/" AR6004_HW_1_3_FIRMWARE_FILE); +MODULE_FIRMWARE(AR6004_HW_1_3_BOARD_DATA_FILE); +MODULE_FIRMWARE(AR6004_HW_1_3_DEFAULT_BOARD_DATA_FILE); |