![Ivo van Doorn](/assets/img/avatar_default.png)
rt2x00usb_vendor_request_large_buff is write-only, so it is safe to make the argument a const. Fixes compile warning: drivers/net/wireless/rt2x00/rt73usb.c: In function 'rt73usb_load_firmware': drivers/net/wireless/rt2x00/rt73usb.c:916: warning: passing argument 5 of 'rt2x00usb_vendor_request_large_buff' discards qualifiers from pointer target typ Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
642 lines
15 KiB
C
642 lines
15 KiB
C
/*
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Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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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/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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/*
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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 i;
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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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for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
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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);
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if (status >= 0)
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return 0;
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/*
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* Check for errors
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* -ENODEV: Device has disappeared, no point continuing.
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* All other errors: Try again.
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*/
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else if (status == -ENODEV)
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break;
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}
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ERROR(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->usb_cache_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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ERROR(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, const int timeout)
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{
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int status;
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mutex_lock(&rt2x00dev->usb_cache_mutex);
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status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
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requesttype, offset, buffer,
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buffer_length, timeout);
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mutex_unlock(&rt2x00dev->usb_cache_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_vendor_request_large_buff(struct rt2x00_dev *rt2x00dev,
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const u8 request, const u8 requesttype,
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const u16 offset, const void *buffer,
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const u16 buffer_length,
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const int timeout)
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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->usb_cache_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, 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->usb_cache_mutex);
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return status;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_large_buff);
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/*
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* TX data handlers.
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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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struct txdone_entry_desc txdesc;
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if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
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!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
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return;
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/*
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* Remove the descriptor data from the buffer.
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*/
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skb_pull(entry->skb, entry->queue->desc_size);
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/*
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* Obtain the status about this packet.
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* Note that when the status is 0 it does not mean the
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* frame was send out correctly. It only means the frame
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* was succesfully 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 (!urb->status)
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__set_bit(TXDONE_UNKNOWN, &txdesc.flags);
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else
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__set_bit(TXDONE_FAILURE, &txdesc.flags);
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txdesc.retry = 0;
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rt2x00lib_txdone(entry, &txdesc);
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}
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int rt2x00usb_write_tx_data(struct queue_entry *entry)
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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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struct skb_frame_desc *skbdesc;
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u32 length;
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/*
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* Add the descriptor in front of the skb.
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*/
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skb_push(entry->skb, entry->queue->desc_size);
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memset(entry->skb->data, 0, entry->queue->desc_size);
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/*
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* Fill in skb descriptor
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*/
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skbdesc = get_skb_frame_desc(entry->skb);
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skbdesc->desc = entry->skb->data;
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skbdesc->desc_len = entry->queue->desc_size;
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/*
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* USB devices cannot blindly pass the skb->len as the
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* length of the data to usb_fill_bulk_urb. Pass the skb
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* to the driver to determine what the length should be.
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*/
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length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, entry->skb);
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usb_fill_bulk_urb(entry_priv->urb, usb_dev,
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usb_sndbulkpipe(usb_dev, 1),
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entry->skb->data, length,
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rt2x00usb_interrupt_txdone, entry);
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return 0;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);
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static inline void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
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{
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struct queue_entry_priv_usb *entry_priv = entry->priv_data;
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if (__test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags))
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usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
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}
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void rt2x00usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
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const enum data_queue_qid qid)
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{
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struct data_queue *queue = rt2x00queue_get_queue(rt2x00dev, qid);
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unsigned long irqflags;
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unsigned int index;
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unsigned int index_done;
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unsigned int i;
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/*
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* Only protect the range we are going to loop over,
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* if during our loop a extra entry is set to pending
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* it should not be kicked during this run, since it
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* is part of another TX operation.
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*/
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spin_lock_irqsave(&queue->lock, irqflags);
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index = queue->index[Q_INDEX];
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index_done = queue->index[Q_INDEX_DONE];
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spin_unlock_irqrestore(&queue->lock, irqflags);
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/*
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* Start from the TX done pointer, this guarentees that we will
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* send out all frames in the correct order.
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*/
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if (index_done < index) {
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for (i = index_done; i < index; i++)
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rt2x00usb_kick_tx_entry(&queue->entries[i]);
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} else {
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for (i = index_done; i < queue->limit; i++)
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rt2x00usb_kick_tx_entry(&queue->entries[i]);
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for (i = 0; i < index; i++)
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rt2x00usb_kick_tx_entry(&queue->entries[i]);
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}
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_kick_tx_queue);
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/*
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* RX data handlers.
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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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struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
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u8 rxd[32];
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if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
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!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
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* 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_OWNER_DEVICE_DATA, &entry->flags);
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usb_submit_urb(urb, GFP_ATOMIC);
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return;
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}
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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->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(rt2x00dev, entry);
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}
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/*
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* Radio handlers
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*/
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void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
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{
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struct queue_entry_priv_usb *entry_priv;
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struct queue_entry_priv_usb_bcn *bcn_priv;
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struct data_queue *queue;
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unsigned int i;
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rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
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REGISTER_TIMEOUT);
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/*
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* Cancel all queues.
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*/
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queue_for_each(rt2x00dev, queue) {
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for (i = 0; i < queue->limit; i++) {
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entry_priv = queue->entries[i].priv_data;
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usb_kill_urb(entry_priv->urb);
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}
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}
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/*
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* Kill guardian urb (if required by driver).
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*/
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if (!test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
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return;
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for (i = 0; i < rt2x00dev->bcn->limit; i++) {
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bcn_priv = rt2x00dev->bcn->entries[i].priv_data;
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if (bcn_priv->guardian_urb)
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usb_kill_urb(bcn_priv->guardian_urb);
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}
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
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/*
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* Device initialization handlers.
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*/
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void rt2x00usb_init_rxentry(struct rt2x00_dev *rt2x00dev,
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struct queue_entry *entry)
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{
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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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usb_fill_bulk_urb(entry_priv->urb, usb_dev,
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usb_rcvbulkpipe(usb_dev, 1),
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entry->skb->data, entry->skb->len,
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rt2x00usb_interrupt_rxdone, entry);
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__set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
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usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_init_rxentry);
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void rt2x00usb_init_txentry(struct rt2x00_dev *rt2x00dev,
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struct queue_entry *entry)
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{
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entry->flags = 0;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_init_txentry);
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static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
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struct data_queue *queue)
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{
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struct queue_entry_priv_usb *entry_priv;
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struct queue_entry_priv_usb_bcn *bcn_priv;
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unsigned int i;
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for (i = 0; i < queue->limit; i++) {
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entry_priv = queue->entries[i].priv_data;
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entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!entry_priv->urb)
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return -ENOMEM;
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}
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/*
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* If this is not the beacon queue or
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* no guardian byte was required for the beacon,
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* then we are done.
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*/
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if (rt2x00dev->bcn != queue ||
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!test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
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return 0;
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for (i = 0; i < queue->limit; i++) {
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bcn_priv = queue->entries[i].priv_data;
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bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!bcn_priv->guardian_urb)
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return -ENOMEM;
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}
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return 0;
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}
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static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev,
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struct data_queue *queue)
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{
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struct queue_entry_priv_usb *entry_priv;
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struct queue_entry_priv_usb_bcn *bcn_priv;
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unsigned int i;
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if (!queue->entries)
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return;
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for (i = 0; i < queue->limit; i++) {
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entry_priv = queue->entries[i].priv_data;
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usb_kill_urb(entry_priv->urb);
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usb_free_urb(entry_priv->urb);
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}
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/*
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* If this is not the beacon queue or
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* no guardian byte was required for the beacon,
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* then we are done.
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*/
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if (rt2x00dev->bcn != queue ||
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!test_bit(DRIVER_REQUIRE_BEACON_GUARD, &rt2x00dev->flags))
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return;
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for (i = 0; i < queue->limit; i++) {
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bcn_priv = queue->entries[i].priv_data;
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usb_kill_urb(bcn_priv->guardian_urb);
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usb_free_urb(bcn_priv->guardian_urb);
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}
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}
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int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
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{
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struct data_queue *queue;
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int status;
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/*
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* Allocate DMA
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*/
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queue_for_each(rt2x00dev, queue) {
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status = rt2x00usb_alloc_urb(rt2x00dev, queue);
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if (status)
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goto exit;
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}
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return 0;
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exit:
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rt2x00usb_uninitialize(rt2x00dev);
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return status;
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
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void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
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{
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struct data_queue *queue;
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queue_for_each(rt2x00dev, queue)
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rt2x00usb_free_urb(rt2x00dev, queue);
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}
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EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
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/*
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* USB driver handlers.
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*/
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static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
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{
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kfree(rt2x00dev->rf);
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rt2x00dev->rf = NULL;
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kfree(rt2x00dev->eeprom);
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rt2x00dev->eeprom = NULL;
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kfree(rt2x00dev->csr.cache);
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rt2x00dev->csr.cache = NULL;
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}
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static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
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{
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rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
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if (!rt2x00dev->csr.cache)
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goto exit;
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rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
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if (!rt2x00dev->eeprom)
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goto exit;
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rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
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if (!rt2x00dev->rf)
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goto exit;
|
|
|
|
return 0;
|
|
|
|
exit:
|
|
ERROR_PROBE("Failed to allocate registers.\n");
|
|
|
|
rt2x00usb_free_reg(rt2x00dev);
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
int rt2x00usb_probe(struct usb_interface *usb_intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
|
|
struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info;
|
|
struct ieee80211_hw *hw;
|
|
struct rt2x00_dev *rt2x00dev;
|
|
int retval;
|
|
|
|
usb_dev = usb_get_dev(usb_dev);
|
|
|
|
hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
|
|
if (!hw) {
|
|
ERROR_PROBE("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;
|
|
mutex_init(&rt2x00dev->usb_cache_mutex);
|
|
|
|
rt2x00dev->usb_maxpacket =
|
|
usb_maxpacket(usb_dev, usb_sndbulkpipe(usb_dev, 1), 1);
|
|
if (!rt2x00dev->usb_maxpacket)
|
|
rt2x00dev->usb_maxpacket = 1;
|
|
|
|
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;
|
|
int retval;
|
|
|
|
retval = rt2x00lib_suspend(rt2x00dev, state);
|
|
if (retval)
|
|
return retval;
|
|
|
|
rt2x00usb_free_reg(rt2x00dev);
|
|
|
|
/*
|
|
* Decrease usbdev refcount.
|
|
*/
|
|
usb_put_dev(interface_to_usbdev(usb_intf));
|
|
|
|
return 0;
|
|
}
|
|
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;
|
|
int retval;
|
|
|
|
usb_get_dev(interface_to_usbdev(usb_intf));
|
|
|
|
retval = rt2x00usb_alloc_reg(rt2x00dev);
|
|
if (retval)
|
|
return retval;
|
|
|
|
retval = rt2x00lib_resume(rt2x00dev);
|
|
if (retval)
|
|
goto exit_free_reg;
|
|
|
|
return 0;
|
|
|
|
exit_free_reg:
|
|
rt2x00usb_free_reg(rt2x00dev);
|
|
|
|
return retval;
|
|
}
|
|
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");
|