// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
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Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
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<http://rt2x00.serialmonkey.com>
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*/
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/*
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Module: rt2x00usb
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Abstract: rt2x00 generic usb device routines.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/bug.h>
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#include "rt2x00.h"
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#include "rt2x00usb.h"
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static bool rt2x00usb_check_usb_error(struct rt2x00_dev *rt2x00dev, int status)
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{
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if (status == -ENODEV || status == -ENOENT)
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return true;
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if (!test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
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return false;
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if (status == -EPROTO || status == -ETIMEDOUT)
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rt2x00dev->num_proto_errs++;
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else
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rt2x00dev->num_proto_errs = 0;
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if (rt2x00dev->num_proto_errs > 3)
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return true;
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return false;
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}
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/*
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* Interfacing with the HW.
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*/
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int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
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const u8 request, const u8 requesttype,
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const u16 offset, const u16 value,
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void *buffer, const u16 buffer_length,
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const int timeout)
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{
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struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
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int status;
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unsigned int pipe =
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(requesttype == USB_VENDOR_REQUEST_IN) ?
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usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
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unsigned long expire = jiffies + msecs_to_jiffies(timeout);
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if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
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return -ENODEV;
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do {
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status = usb_control_msg(usb_dev, pipe, request, requesttype,
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value, offset, buffer, buffer_length,
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timeout / 2);
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if (status >= 0)
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return 0;
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if (rt2x00usb_check_usb_error(rt2x00dev, status)) {
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/* Device has disappeared. */
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clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
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break;
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}
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} while (time_before(jiffies, expire));
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rt2x00_err(rt2x00dev,
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"Vendor Request 0x%02x failed for offset 0x%04x with error %d\n",
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request, offset, status);
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return status;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
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int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
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const u8 request, const u8 requesttype,
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const u16 offset, void *buffer,
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const u16 buffer_length, const int timeout)
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{
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int status;
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BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex));
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/*
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* Check for Cache availability.
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*/
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if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
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rt2x00_err(rt2x00dev, "CSR cache not available\n");
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return -ENOMEM;
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}
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if (requesttype == USB_VENDOR_REQUEST_OUT)
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memcpy(rt2x00dev->csr.cache, buffer, buffer_length);
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status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype,
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offset, 0, rt2x00dev->csr.cache,
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buffer_length, timeout);
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if (!status && requesttype == USB_VENDOR_REQUEST_IN)
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memcpy(buffer, rt2x00dev->csr.cache, buffer_length);
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return status;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);
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int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
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const u8 request, const u8 requesttype,
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const u16 offset, void *buffer,
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const u16 buffer_length)
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{
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int status = 0;
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unsigned char *tb;
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u16 off, len, bsize;
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mutex_lock(&rt2x00dev->csr_mutex);
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tb = (char *)buffer;
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off = offset;
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len = buffer_length;
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while (len && !status) {
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bsize = min_t(u16, CSR_CACHE_SIZE, len);
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status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
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requesttype, off, tb,
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bsize, REGISTER_TIMEOUT);
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tb += bsize;
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len -= bsize;
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off += bsize;
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}
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mutex_unlock(&rt2x00dev->csr_mutex);
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return status;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);
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int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
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const unsigned int offset,
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const struct rt2x00_field32 field,
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u32 *reg)
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{
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unsigned int i;
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if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
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return -ENODEV;
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for (i = 0; i < REGISTER_USB_BUSY_COUNT; i++) {
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*reg = rt2x00usb_register_read_lock(rt2x00dev, offset);
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if (!rt2x00_get_field32(*reg, field))
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return 1;
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udelay(REGISTER_BUSY_DELAY);
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}
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rt2x00_err(rt2x00dev, "Indirect register access failed: offset=0x%.08x, value=0x%.08x\n",
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offset, *reg);
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*reg = ~0;
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return 0;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);
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struct rt2x00_async_read_data {
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__le32 reg;
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struct usb_ctrlrequest cr;
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struct rt2x00_dev *rt2x00dev;
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bool (*callback)(struct rt2x00_dev *, int, u32);
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};
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static void rt2x00usb_register_read_async_cb(struct urb *urb)
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{
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struct rt2x00_async_read_data *rd = urb->context;
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if (rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg))) {
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usb_anchor_urb(urb, rd->rt2x00dev->anchor);
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if (usb_submit_urb(urb, GFP_ATOMIC) < 0) {
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usb_unanchor_urb(urb);
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kfree(rd);
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}
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} else
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kfree(rd);
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}
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void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
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const unsigned int offset,
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bool (*callback)(struct rt2x00_dev*, int, u32))
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{
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struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
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struct urb *urb;
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struct rt2x00_async_read_data *rd;
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rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
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if (!rd)
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return;
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urb = usb_alloc_urb(0, GFP_ATOMIC);
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if (!urb) {
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kfree(rd);
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return;
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}
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rd->rt2x00dev = rt2x00dev;
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rd->callback = callback;
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rd->cr.bRequestType = USB_VENDOR_REQUEST_IN;
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rd->cr.bRequest = USB_MULTI_READ;
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rd->cr.wValue = 0;
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rd->cr.wIndex = cpu_to_le16(offset);
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rd->cr.wLength = cpu_to_le16(sizeof(u32));
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usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0),
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(unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg),
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rt2x00usb_register_read_async_cb, rd);
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usb_anchor_urb(urb, rt2x00dev->anchor);
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if (usb_submit_urb(urb, GFP_ATOMIC) < 0) {
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usb_unanchor_urb(urb);
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kfree(rd);
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}
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usb_free_urb(urb);
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async);
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/*
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* TX data handlers.
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*/
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static void rt2x00usb_work_txdone_entry(struct queue_entry *entry)
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{
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/*
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* If the transfer to hardware succeeded, it does not mean the
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* frame was send out correctly. It only means the frame
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* was successfully pushed to the hardware, we have no
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* way to determine the transmission status right now.
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* (Only indirectly by looking at the failed TX counters
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* in the register).
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*/
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if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
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rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
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else
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rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN);
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}
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static void rt2x00usb_work_txdone(struct work_struct *work)
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{
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struct rt2x00_dev *rt2x00dev =
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container_of(work, struct rt2x00_dev, txdone_work);
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struct data_queue *queue;
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struct queue_entry *entry;
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tx_queue_for_each(rt2x00dev, queue) {
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while (!rt2x00queue_empty(queue)) {
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entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
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if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
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!test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
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break;
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rt2x00usb_work_txdone_entry(entry);
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}
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}
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}
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static void rt2x00usb_interrupt_txdone(struct urb *urb)
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{
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struct queue_entry *entry = (struct queue_entry *)urb->context;
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struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
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if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
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return;
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/*
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* Check if the frame was correctly uploaded
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*/
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if (urb->status)
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set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
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/*
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* Report the frame as DMA done
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*/
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rt2x00lib_dmadone(entry);
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if (rt2x00dev->ops->lib->tx_dma_done)
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rt2x00dev->ops->lib->tx_dma_done(entry);
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/*
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* Schedule the delayed work for reading the TX status
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* from the device.
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*/
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if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_TXSTATUS_FIFO) ||
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!kfifo_is_empty(&rt2x00dev->txstatus_fifo))
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queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
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}
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static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void *data)
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{
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struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
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struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
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struct queue_entry_priv_usb *entry_priv = entry->priv_data;
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u32 length;
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int status;
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if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
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test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
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return false;
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/*
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* USB devices require certain padding at the end of each frame
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* and urb. Those paddings are not included in skbs. Pass entry
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* to the driver to determine what the overall length should be.
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*/
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length = rt2x00dev->ops->lib->get_tx_data_len(entry);
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status = skb_padto(entry->skb, length);
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if (unlikely(status)) {
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/* TODO: report something more appropriate than IO_FAILED. */
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rt2x00_warn(rt2x00dev, "TX SKB padding error, out of memory\n");
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set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
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rt2x00lib_dmadone(entry);
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return false;
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}
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usb_fill_bulk_urb(entry_priv->urb, usb_dev,
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usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint),
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entry->skb->data, length,
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rt2x00usb_interrupt_txdone, entry);
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status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
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if (status) {
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if (rt2x00usb_check_usb_error(rt2x00dev, status))
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clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
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set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
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rt2x00lib_dmadone(entry);
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}
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return false;
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}
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/*
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* RX data handlers.
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*/
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static void rt2x00usb_work_rxdone(struct work_struct *work)
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{
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struct rt2x00_dev *rt2x00dev =
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container_of(work, struct rt2x00_dev, rxdone_work);
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struct queue_entry *entry;
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struct skb_frame_desc *skbdesc;
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u8 rxd[32];
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while (!rt2x00queue_empty(rt2x00dev->rx)) {
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entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE);
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if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
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break;
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/*
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* Fill in desc fields of the skb descriptor
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*/
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skbdesc = get_skb_frame_desc(entry->skb);
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skbdesc->desc = rxd;
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skbdesc->desc_len = entry->queue->desc_size;
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/*
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* Send the frame to rt2x00lib for further processing.
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*/
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rt2x00lib_rxdone(entry, GFP_KERNEL);
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}
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}
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static void rt2x00usb_interrupt_rxdone(struct urb *urb)
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{
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struct queue_entry *entry = (struct queue_entry *)urb->context;
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struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
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if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
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return;
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/*
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* Check if the received data is simply too small
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* to be actually valid, or if the urb is signaling
|
* a problem.
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*/
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if (urb->actual_length < entry->queue->desc_size || urb->status)
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set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
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/*
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* Report the frame as DMA done
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*/
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rt2x00lib_dmadone(entry);
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/*
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* Schedule the delayed work for processing RX data
|
*/
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queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
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}
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static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void *data)
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{
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struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
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struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
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struct queue_entry_priv_usb *entry_priv = entry->priv_data;
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int status;
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if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
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return false;
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rt2x00lib_dmastart(entry);
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usb_fill_bulk_urb(entry_priv->urb, usb_dev,
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usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint),
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entry->skb->data, entry->skb->len,
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rt2x00usb_interrupt_rxdone, entry);
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status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
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if (status) {
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if (rt2x00usb_check_usb_error(rt2x00dev, status))
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clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
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set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
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rt2x00lib_dmadone(entry);
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}
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return false;
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}
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void rt2x00usb_kick_queue(struct data_queue *queue)
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{
|
switch (queue->qid) {
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case QID_AC_VO:
|
case QID_AC_VI:
|
case QID_AC_BE:
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case QID_AC_BK:
|
if (!rt2x00queue_empty(queue))
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rt2x00queue_for_each_entry(queue,
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Q_INDEX_DONE,
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Q_INDEX,
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NULL,
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rt2x00usb_kick_tx_entry);
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break;
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case QID_RX:
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if (!rt2x00queue_full(queue))
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rt2x00queue_for_each_entry(queue,
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Q_INDEX,
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Q_INDEX_DONE,
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NULL,
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rt2x00usb_kick_rx_entry);
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break;
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default:
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break;
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}
|
}
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EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);
|
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static bool rt2x00usb_flush_entry(struct queue_entry *entry, void *data)
|
{
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struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
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struct queue_entry_priv_usb *entry_priv = entry->priv_data;
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struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data;
|
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if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
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return false;
|
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usb_kill_urb(entry_priv->urb);
|
|
/*
|
* Kill guardian urb (if required by driver).
|
*/
|
if ((entry->queue->qid == QID_BEACON) &&
|
(rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD)))
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usb_kill_urb(bcn_priv->guardian_urb);
|
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return false;
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}
|
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void rt2x00usb_flush_queue(struct data_queue *queue, bool drop)
|
{
|
struct work_struct *completion;
|
unsigned int i;
|
|
if (drop)
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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(50);
|
}
|
}
|
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 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 ||
|
!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
|
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 ||
|
!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_BEACON_GUARD))
|
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;
|
|
usb_kill_anchored_urbs(rt2x00dev->anchor);
|
hrtimer_cancel(&rt2x00dev->txstatus_timer);
|
cancel_work_sync(&rt2x00dev->rxdone_work);
|
cancel_work_sync(&rt2x00dev->txdone_work);
|
|
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;
|
|
rt2x00dev->anchor = devm_kmalloc(&usb_dev->dev,
|
sizeof(struct usb_anchor),
|
GFP_KERNEL);
|
if (!rt2x00dev->anchor) {
|
retval = -ENOMEM;
|
goto exit_free_reg;
|
}
|
init_usb_anchor(rt2x00dev->anchor);
|
|
retval = rt2x00lib_probe_dev(rt2x00dev);
|
if (retval)
|
goto exit_free_anchor;
|
|
return 0;
|
|
exit_free_anchor:
|
usb_kill_anchored_urbs(rt2x00dev->anchor);
|
|
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);
|
}
|
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");
|
