| /* |
| Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> |
| Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> |
| <http://rt2x00.serialmonkey.com> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the |
| Free Software Foundation, Inc., |
| 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| Module: rt2x00usb |
| Abstract: rt2x00 generic usb device routines. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/usb.h> |
| #include <linux/bug.h> |
| |
| #include "rt2x00.h" |
| #include "rt2x00usb.h" |
| |
| /* |
| * Interfacing with the HW. |
| */ |
| int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev, |
| const u8 request, const u8 requesttype, |
| const u16 offset, const u16 value, |
| void *buffer, const u16 buffer_length, |
| const int timeout) |
| { |
| struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
| int status; |
| unsigned int i; |
| unsigned int pipe = |
| (requesttype == USB_VENDOR_REQUEST_IN) ? |
| usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0); |
| |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return -ENODEV; |
| |
| for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
| status = usb_control_msg(usb_dev, pipe, request, requesttype, |
| value, offset, buffer, buffer_length, |
| timeout); |
| if (status >= 0) |
| return 0; |
| |
| /* |
| * Check for errors |
| * -ENODEV: Device has disappeared, no point continuing. |
| * All other errors: Try again. |
| */ |
| else if (status == -ENODEV) { |
| clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
| break; |
| } |
| } |
| |
| rt2x00_err(rt2x00dev, |
| "Vendor Request 0x%02x failed for offset 0x%04x with error %d\n", |
| request, offset, status); |
| |
| return status; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request); |
| |
| int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev, |
| const u8 request, const u8 requesttype, |
| const u16 offset, void *buffer, |
| const u16 buffer_length, const int timeout) |
| { |
| int status; |
| |
| BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex)); |
| |
| /* |
| * Check for Cache availability. |
| */ |
| if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) { |
| rt2x00_err(rt2x00dev, "CSR cache not available\n"); |
| return -ENOMEM; |
| } |
| |
| if (requesttype == USB_VENDOR_REQUEST_OUT) |
| memcpy(rt2x00dev->csr.cache, buffer, buffer_length); |
| |
| status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype, |
| offset, 0, rt2x00dev->csr.cache, |
| buffer_length, timeout); |
| |
| if (!status && requesttype == USB_VENDOR_REQUEST_IN) |
| memcpy(buffer, rt2x00dev->csr.cache, buffer_length); |
| |
| return status; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock); |
| |
| int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev, |
| const u8 request, const u8 requesttype, |
| const u16 offset, void *buffer, |
| const u16 buffer_length, const int timeout) |
| { |
| int status = 0; |
| unsigned char *tb; |
| u16 off, len, bsize; |
| |
| mutex_lock(&rt2x00dev->csr_mutex); |
| |
| tb = (char *)buffer; |
| off = offset; |
| len = buffer_length; |
| while (len && !status) { |
| bsize = min_t(u16, CSR_CACHE_SIZE, len); |
| status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request, |
| requesttype, off, tb, |
| bsize, timeout); |
| |
| tb += bsize; |
| len -= bsize; |
| off += bsize; |
| } |
| |
| mutex_unlock(&rt2x00dev->csr_mutex); |
| |
| return status; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff); |
| |
| int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev, |
| const unsigned int offset, |
| const struct rt2x00_field32 field, |
| u32 *reg) |
| { |
| unsigned int i; |
| |
| if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags)) |
| return -ENODEV; |
| |
| for (i = 0; i < REGISTER_BUSY_COUNT; i++) { |
| rt2x00usb_register_read_lock(rt2x00dev, offset, reg); |
| if (!rt2x00_get_field32(*reg, field)) |
| return 1; |
| udelay(REGISTER_BUSY_DELAY); |
| } |
| |
| rt2x00_err(rt2x00dev, "Indirect register access failed: offset=0x%.08x, value=0x%.08x\n", |
| offset, *reg); |
| *reg = ~0; |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read); |
| |
| |
| struct rt2x00_async_read_data { |
| __le32 reg; |
| struct usb_ctrlrequest cr; |
| struct rt2x00_dev *rt2x00dev; |
| bool (*callback)(struct rt2x00_dev *, int, u32); |
| }; |
| |
| static void rt2x00usb_register_read_async_cb(struct urb *urb) |
| { |
| struct rt2x00_async_read_data *rd = urb->context; |
| if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) { |
| if (usb_submit_urb(urb, GFP_ATOMIC) < 0) |
| kfree(rd); |
| } else |
| kfree(rd); |
| } |
| |
| void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev, |
| const unsigned int offset, |
| bool (*callback)(struct rt2x00_dev*, int, u32)) |
| { |
| struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
| struct urb *urb; |
| struct rt2x00_async_read_data *rd; |
| |
| rd = kmalloc(sizeof(*rd), GFP_ATOMIC); |
| if (!rd) |
| return; |
| |
| urb = usb_alloc_urb(0, GFP_ATOMIC); |
| if (!urb) { |
| kfree(rd); |
| return; |
| } |
| |
| rd->rt2x00dev = rt2x00dev; |
| rd->callback = callback; |
| rd->cr.bRequestType = USB_VENDOR_REQUEST_IN; |
| rd->cr.bRequest = USB_MULTI_READ; |
| rd->cr.wValue = 0; |
| rd->cr.wIndex = cpu_to_le16(offset); |
| rd->cr.wLength = cpu_to_le16(sizeof(u32)); |
| |
| usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0), |
| (unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg), |
| rt2x00usb_register_read_async_cb, rd); |
| if (usb_submit_urb(urb, GFP_ATOMIC) < 0) |
| kfree(rd); |
| usb_free_urb(urb); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async); |
| |
| /* |
| * TX data handlers. |
| */ |
| static void rt2x00usb_work_txdone_entry(struct queue_entry *entry) |
| { |
| /* |
| * If the transfer to hardware succeeded, it does not mean the |
| * frame was send out correctly. It only means the frame |
| * was successfully pushed to the hardware, we have no |
| * way to determine the transmission status right now. |
| * (Only indirectly by looking at the failed TX counters |
| * in the register). |
| */ |
| if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags)) |
| rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE); |
| else |
| rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN); |
| } |
| |
| static void rt2x00usb_work_txdone(struct work_struct *work) |
| { |
| struct rt2x00_dev *rt2x00dev = |
| container_of(work, struct rt2x00_dev, txdone_work); |
| struct data_queue *queue; |
| struct queue_entry *entry; |
| |
| tx_queue_for_each(rt2x00dev, queue) { |
| while (!rt2x00queue_empty(queue)) { |
| entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE); |
| |
| if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
| !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) |
| break; |
| |
| rt2x00usb_work_txdone_entry(entry); |
| } |
| } |
| } |
| |
| static void rt2x00usb_interrupt_txdone(struct urb *urb) |
| { |
| struct queue_entry *entry = (struct queue_entry *)urb->context; |
| struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
| |
| if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
| return; |
| /* |
| * Check if the frame was correctly uploaded |
| */ |
| if (urb->status) |
| set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
| /* |
| * Report the frame as DMA done |
| */ |
| rt2x00lib_dmadone(entry); |
| |
| if (rt2x00dev->ops->lib->tx_dma_done) |
| rt2x00dev->ops->lib->tx_dma_done(entry); |
| /* |
| * Schedule the delayed work for reading the TX status |
| * from the device. |
| */ |
| if (!test_bit(REQUIRE_TXSTATUS_FIFO, &rt2x00dev->cap_flags) || |
| !kfifo_is_empty(&rt2x00dev->txstatus_fifo)) |
| queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work); |
| } |
| |
| static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data) |
| { |
| struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
| struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
| struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
| u32 length; |
| int status; |
| |
| if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) || |
| test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) |
| return false; |
| |
| /* |
| * USB devices require certain padding at the end of each frame |
| * and urb. Those paddings are not included in skbs. Pass entry |
| * to the driver to determine what the overall length should be. |
| */ |
| length = rt2x00dev->ops->lib->get_tx_data_len(entry); |
| |
| status = skb_padto(entry->skb, length); |
| if (unlikely(status)) { |
| /* TODO: report something more appropriate than IO_FAILED. */ |
| rt2x00_warn(rt2x00dev, "TX SKB padding error, out of memory\n"); |
| set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
| rt2x00lib_dmadone(entry); |
| |
| return false; |
| } |
| |
| usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
| usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint), |
| entry->skb->data, length, |
| rt2x00usb_interrupt_txdone, entry); |
| |
| status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
| if (status) { |
| if (status == -ENODEV) |
| clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
| set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
| rt2x00lib_dmadone(entry); |
| } |
| |
| return false; |
| } |
| |
| /* |
| * RX data handlers. |
| */ |
| static void rt2x00usb_work_rxdone(struct work_struct *work) |
| { |
| struct rt2x00_dev *rt2x00dev = |
| container_of(work, struct rt2x00_dev, rxdone_work); |
| struct queue_entry *entry; |
| struct skb_frame_desc *skbdesc; |
| u8 rxd[32]; |
| |
| while (!rt2x00queue_empty(rt2x00dev->rx)) { |
| entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE); |
| |
| if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
| !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) |
| break; |
| |
| /* |
| * Fill in desc fields of the skb descriptor |
| */ |
| skbdesc = get_skb_frame_desc(entry->skb); |
| skbdesc->desc = rxd; |
| skbdesc->desc_len = entry->queue->desc_size; |
| |
| /* |
| * Send the frame to rt2x00lib for further processing. |
| */ |
| rt2x00lib_rxdone(entry, GFP_KERNEL); |
| } |
| } |
| |
| static void rt2x00usb_interrupt_rxdone(struct urb *urb) |
| { |
| struct queue_entry *entry = (struct queue_entry *)urb->context; |
| struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
| |
| if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
| return; |
| |
| /* |
| * Report the frame as DMA done |
| */ |
| rt2x00lib_dmadone(entry); |
| |
| /* |
| * Check if the received data is simply too small |
| * to be actually valid, or if the urb is signaling |
| * a problem. |
| */ |
| if (urb->actual_length < entry->queue->desc_size || urb->status) |
| set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
| |
| /* |
| * Schedule the delayed work for reading the RX status |
| * from the device. |
| */ |
| queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work); |
| } |
| |
| static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data) |
| { |
| struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
| struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev); |
| struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
| int status; |
| |
| if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) || |
| test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags)) |
| return false; |
| |
| rt2x00lib_dmastart(entry); |
| |
| usb_fill_bulk_urb(entry_priv->urb, usb_dev, |
| usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint), |
| entry->skb->data, entry->skb->len, |
| rt2x00usb_interrupt_rxdone, entry); |
| |
| status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC); |
| if (status) { |
| if (status == -ENODEV) |
| clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags); |
| set_bit(ENTRY_DATA_IO_FAILED, &entry->flags); |
| rt2x00lib_dmadone(entry); |
| } |
| |
| return false; |
| } |
| |
| void rt2x00usb_kick_queue(struct data_queue *queue) |
| { |
| switch (queue->qid) { |
| case QID_AC_VO: |
| case QID_AC_VI: |
| case QID_AC_BE: |
| case QID_AC_BK: |
| if (!rt2x00queue_empty(queue)) |
| rt2x00queue_for_each_entry(queue, |
| Q_INDEX_DONE, |
| Q_INDEX, |
| NULL, |
| rt2x00usb_kick_tx_entry); |
| break; |
| case QID_RX: |
| if (!rt2x00queue_full(queue)) |
| rt2x00queue_for_each_entry(queue, |
| Q_INDEX, |
| Q_INDEX_DONE, |
| NULL, |
| rt2x00usb_kick_rx_entry); |
| break; |
| default: |
| break; |
| } |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue); |
| |
| static bool rt2x00usb_flush_entry(struct queue_entry *entry, void *data) |
| { |
| struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
| struct queue_entry_priv_usb *entry_priv = entry->priv_data; |
| struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data; |
| |
| if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags)) |
| return false; |
| |
| usb_kill_urb(entry_priv->urb); |
| |
| /* |
| * Kill guardian urb (if required by driver). |
| */ |
| if ((entry->queue->qid == QID_BEACON) && |
| (test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))) |
| usb_kill_urb(bcn_priv->guardian_urb); |
| |
| return false; |
| } |
| |
| void rt2x00usb_flush_queue(struct data_queue *queue, bool drop) |
| { |
| struct work_struct *completion; |
| unsigned int i; |
| |
| if (drop) |
| rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL, |
| rt2x00usb_flush_entry); |
| |
| /* |
| * Obtain the queue completion handler |
| */ |
| switch (queue->qid) { |
| case QID_AC_VO: |
| case QID_AC_VI: |
| case QID_AC_BE: |
| case QID_AC_BK: |
| completion = &queue->rt2x00dev->txdone_work; |
| break; |
| case QID_RX: |
| completion = &queue->rt2x00dev->rxdone_work; |
| break; |
| default: |
| return; |
| } |
| |
| for (i = 0; i < 10; i++) { |
| /* |
| * Check if the driver is already done, otherwise we |
| * have to sleep a little while to give the driver/hw |
| * the oppurtunity to complete interrupt process itself. |
| */ |
| if (rt2x00queue_empty(queue)) |
| break; |
| |
| /* |
| * Schedule the completion handler manually, when this |
| * worker function runs, it should cleanup the queue. |
| */ |
| queue_work(queue->rt2x00dev->workqueue, completion); |
| |
| /* |
| * Wait for a little while to give the driver |
| * the oppurtunity to recover itself. |
| */ |
| msleep(10); |
| } |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue); |
| |
| static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue) |
| { |
| rt2x00_warn(queue->rt2x00dev, "TX queue %d DMA timed out, invoke forced forced reset\n", |
| queue->qid); |
| |
| rt2x00queue_stop_queue(queue); |
| rt2x00queue_flush_queue(queue, true); |
| rt2x00queue_start_queue(queue); |
| } |
| |
| static int rt2x00usb_dma_timeout(struct data_queue *queue) |
| { |
| struct queue_entry *entry; |
| |
| entry = rt2x00queue_get_entry(queue, Q_INDEX_DMA_DONE); |
| return rt2x00queue_dma_timeout(entry); |
| } |
| |
| void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev) |
| { |
| struct data_queue *queue; |
| |
| tx_queue_for_each(rt2x00dev, queue) { |
| if (!rt2x00queue_empty(queue)) { |
| if (rt2x00usb_dma_timeout(queue)) |
| rt2x00usb_watchdog_tx_dma(queue); |
| } |
| } |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_watchdog); |
| |
| /* |
| * Radio handlers |
| */ |
| void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev) |
| { |
| rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0, |
| REGISTER_TIMEOUT); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio); |
| |
| /* |
| * Device initialization handlers. |
| */ |
| void rt2x00usb_clear_entry(struct queue_entry *entry) |
| { |
| entry->flags = 0; |
| |
| if (entry->queue->qid == QID_RX) |
| rt2x00usb_kick_rx_entry(entry, NULL); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry); |
| |
| static void rt2x00usb_assign_endpoint(struct data_queue *queue, |
| struct usb_endpoint_descriptor *ep_desc) |
| { |
| struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev); |
| int pipe; |
| |
| queue->usb_endpoint = usb_endpoint_num(ep_desc); |
| |
| if (queue->qid == QID_RX) { |
| pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint); |
| queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0); |
| } else { |
| pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint); |
| queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1); |
| } |
| |
| if (!queue->usb_maxpacket) |
| queue->usb_maxpacket = 1; |
| } |
| |
| static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev) |
| { |
| struct usb_interface *intf = to_usb_interface(rt2x00dev->dev); |
| struct usb_host_interface *intf_desc = intf->cur_altsetting; |
| struct usb_endpoint_descriptor *ep_desc; |
| struct data_queue *queue = rt2x00dev->tx; |
| struct usb_endpoint_descriptor *tx_ep_desc = NULL; |
| unsigned int i; |
| |
| /* |
| * Walk through all available endpoints to search for "bulk in" |
| * and "bulk out" endpoints. When we find such endpoints collect |
| * the information we need from the descriptor and assign it |
| * to the queue. |
| */ |
| for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { |
| ep_desc = &intf_desc->endpoint[i].desc; |
| |
| if (usb_endpoint_is_bulk_in(ep_desc)) { |
| rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc); |
| } else if (usb_endpoint_is_bulk_out(ep_desc) && |
| (queue != queue_end(rt2x00dev))) { |
| rt2x00usb_assign_endpoint(queue, ep_desc); |
| queue = queue_next(queue); |
| |
| tx_ep_desc = ep_desc; |
| } |
| } |
| |
| /* |
| * At least 1 endpoint for RX and 1 endpoint for TX must be available. |
| */ |
| if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) { |
| rt2x00_err(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n"); |
| return -EPIPE; |
| } |
| |
| /* |
| * It might be possible not all queues have a dedicated endpoint. |
| * Loop through all TX queues and copy the endpoint information |
| * which we have gathered from already assigned endpoints. |
| */ |
| txall_queue_for_each(rt2x00dev, queue) { |
| if (!queue->usb_endpoint) |
| rt2x00usb_assign_endpoint(queue, tx_ep_desc); |
| } |
| |
| return 0; |
| } |
| |
| static int rt2x00usb_alloc_entries(struct data_queue *queue) |
| { |
| struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
| struct queue_entry_priv_usb *entry_priv; |
| struct queue_entry_priv_usb_bcn *bcn_priv; |
| unsigned int i; |
| |
| for (i = 0; i < queue->limit; i++) { |
| entry_priv = queue->entries[i].priv_data; |
| entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!entry_priv->urb) |
| return -ENOMEM; |
| } |
| |
| /* |
| * If this is not the beacon queue or |
| * no guardian byte was required for the beacon, |
| * then we are done. |
| */ |
| if (queue->qid != QID_BEACON || |
| !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)) |
| return 0; |
| |
| for (i = 0; i < queue->limit; i++) { |
| bcn_priv = queue->entries[i].priv_data; |
| bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!bcn_priv->guardian_urb) |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static void rt2x00usb_free_entries(struct data_queue *queue) |
| { |
| struct rt2x00_dev *rt2x00dev = queue->rt2x00dev; |
| struct queue_entry_priv_usb *entry_priv; |
| struct queue_entry_priv_usb_bcn *bcn_priv; |
| unsigned int i; |
| |
| if (!queue->entries) |
| return; |
| |
| for (i = 0; i < queue->limit; i++) { |
| entry_priv = queue->entries[i].priv_data; |
| usb_kill_urb(entry_priv->urb); |
| usb_free_urb(entry_priv->urb); |
| } |
| |
| /* |
| * If this is not the beacon queue or |
| * no guardian byte was required for the beacon, |
| * then we are done. |
| */ |
| if (queue->qid != QID_BEACON || |
| !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)) |
| return; |
| |
| for (i = 0; i < queue->limit; i++) { |
| bcn_priv = queue->entries[i].priv_data; |
| usb_kill_urb(bcn_priv->guardian_urb); |
| usb_free_urb(bcn_priv->guardian_urb); |
| } |
| } |
| |
| int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev) |
| { |
| struct data_queue *queue; |
| int status; |
| |
| /* |
| * Find endpoints for each queue |
| */ |
| status = rt2x00usb_find_endpoints(rt2x00dev); |
| if (status) |
| goto exit; |
| |
| /* |
| * Allocate DMA |
| */ |
| queue_for_each(rt2x00dev, queue) { |
| status = rt2x00usb_alloc_entries(queue); |
| if (status) |
| goto exit; |
| } |
| |
| return 0; |
| |
| exit: |
| rt2x00usb_uninitialize(rt2x00dev); |
| |
| return status; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_initialize); |
| |
| void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev) |
| { |
| struct data_queue *queue; |
| |
| queue_for_each(rt2x00dev, queue) |
| rt2x00usb_free_entries(queue); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize); |
| |
| /* |
| * USB driver handlers. |
| */ |
| static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev) |
| { |
| kfree(rt2x00dev->rf); |
| rt2x00dev->rf = NULL; |
| |
| kfree(rt2x00dev->eeprom); |
| rt2x00dev->eeprom = NULL; |
| |
| kfree(rt2x00dev->csr.cache); |
| rt2x00dev->csr.cache = NULL; |
| } |
| |
| static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev) |
| { |
| rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL); |
| if (!rt2x00dev->csr.cache) |
| goto exit; |
| |
| rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL); |
| if (!rt2x00dev->eeprom) |
| goto exit; |
| |
| rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL); |
| if (!rt2x00dev->rf) |
| goto exit; |
| |
| return 0; |
| |
| exit: |
| rt2x00_probe_err("Failed to allocate registers\n"); |
| |
| rt2x00usb_free_reg(rt2x00dev); |
| |
| return -ENOMEM; |
| } |
| |
| int rt2x00usb_probe(struct usb_interface *usb_intf, |
| const struct rt2x00_ops *ops) |
| { |
| struct usb_device *usb_dev = interface_to_usbdev(usb_intf); |
| struct ieee80211_hw *hw; |
| struct rt2x00_dev *rt2x00dev; |
| int retval; |
| |
| usb_dev = usb_get_dev(usb_dev); |
| usb_reset_device(usb_dev); |
| |
| hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw); |
| if (!hw) { |
| rt2x00_probe_err("Failed to allocate hardware\n"); |
| retval = -ENOMEM; |
| goto exit_put_device; |
| } |
| |
| usb_set_intfdata(usb_intf, hw); |
| |
| rt2x00dev = hw->priv; |
| rt2x00dev->dev = &usb_intf->dev; |
| rt2x00dev->ops = ops; |
| rt2x00dev->hw = hw; |
| |
| rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); |
| |
| INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone); |
| INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone); |
| hrtimer_init(&rt2x00dev->txstatus_timer, CLOCK_MONOTONIC, |
| HRTIMER_MODE_REL); |
| |
| retval = rt2x00usb_alloc_reg(rt2x00dev); |
| if (retval) |
| goto exit_free_device; |
| |
| retval = rt2x00lib_probe_dev(rt2x00dev); |
| if (retval) |
| goto exit_free_reg; |
| |
| return 0; |
| |
| exit_free_reg: |
| rt2x00usb_free_reg(rt2x00dev); |
| |
| exit_free_device: |
| ieee80211_free_hw(hw); |
| |
| exit_put_device: |
| usb_put_dev(usb_dev); |
| |
| usb_set_intfdata(usb_intf, NULL); |
| |
| return retval; |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_probe); |
| |
| void rt2x00usb_disconnect(struct usb_interface *usb_intf) |
| { |
| struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| |
| /* |
| * Free all allocated data. |
| */ |
| rt2x00lib_remove_dev(rt2x00dev); |
| rt2x00usb_free_reg(rt2x00dev); |
| ieee80211_free_hw(hw); |
| |
| /* |
| * Free the USB device data. |
| */ |
| usb_set_intfdata(usb_intf, NULL); |
| usb_put_dev(interface_to_usbdev(usb_intf)); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_disconnect); |
| |
| #ifdef CONFIG_PM |
| int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state) |
| { |
| struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| |
| return rt2x00lib_suspend(rt2x00dev, state); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_suspend); |
| |
| int rt2x00usb_resume(struct usb_interface *usb_intf) |
| { |
| struct ieee80211_hw *hw = usb_get_intfdata(usb_intf); |
| struct rt2x00_dev *rt2x00dev = hw->priv; |
| |
| return rt2x00lib_resume(rt2x00dev); |
| } |
| EXPORT_SYMBOL_GPL(rt2x00usb_resume); |
| #endif /* CONFIG_PM */ |
| |
| /* |
| * rt2x00usb module information. |
| */ |
| MODULE_AUTHOR(DRV_PROJECT); |
| MODULE_VERSION(DRV_VERSION); |
| MODULE_DESCRIPTION("rt2x00 usb library"); |
| MODULE_LICENSE("GPL"); |