+++ /dev/null
-/*
- Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
- <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.
- */
-
-/*
- * Set enviroment defines for rt2x00.h
- */
-#define DRV_NAME "rt2x00usb"
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/usb.h>
-
-#include "rt2x00.h"
-#include "rt2x00usb.h"
-
-/*
- * Interfacing with the HW.
- */
-int rt2x00usb_vendor_request(const 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 =
- interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
- int status;
- unsigned int i;
- unsigned int pipe =
- (requesttype == USB_VENDOR_REQUEST_IN) ?
- usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
-
- 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)
- break;
- }
-
- ERROR(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_request_buff(const struct rt2x00_dev *rt2x00dev,
- const u8 request, const u8 requesttype,
- const u16 offset, void *buffer,
- const u16 buffer_length, const int timeout)
-{
- int status;
-
- /*
- * Check for Cache availability.
- */
- if (unlikely(!rt2x00dev->csr_cache || buffer_length > CSR_CACHE_SIZE)) {
- ERROR(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_request_buff);
-
-/*
- * TX data handlers.
- */
-static void rt2x00usb_interrupt_txdone(struct urb *urb)
-{
- struct data_entry *entry = (struct data_entry *)urb->context;
- struct data_ring *ring = entry->ring;
- struct rt2x00_dev *rt2x00dev = ring->rt2x00dev;
- struct data_desc *txd = (struct data_desc *)entry->skb->data;
- u32 word;
- int tx_status;
-
- if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
- !__test_and_clear_bit(ENTRY_OWNER_NIC, &entry->flags))
- return;
-
- rt2x00_desc_read(txd, 0, &word);
-
- /*
- * Remove the descriptor data from the buffer.
- */
- skb_pull(entry->skb, ring->desc_size);
-
- /*
- * Obtain the status about this packet.
- */
- tx_status = !urb->status ? TX_SUCCESS : TX_FAIL_RETRY;
-
- rt2x00lib_txdone(entry, tx_status, 0);
-
- /*
- * Make this entry available for reuse.
- */
- entry->flags = 0;
- rt2x00_ring_index_done_inc(entry->ring);
-
- /*
- * If the data ring was full before the txdone handler
- * we must make sure the packet queue in the mac80211 stack
- * is reenabled when the txdone handler has finished.
- */
- if (!rt2x00_ring_full(ring))
- ieee80211_wake_queue(rt2x00dev->hw,
- entry->tx_status.control.queue);
-}
-
-int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
- struct data_ring *ring, struct sk_buff *skb,
- struct ieee80211_tx_control *control)
-{
- struct usb_device *usb_dev =
- interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
- struct data_entry *entry = rt2x00_get_data_entry(ring);
- int pipe = usb_sndbulkpipe(usb_dev, 1);
- u32 length;
-
- if (rt2x00_ring_full(ring)) {
- ieee80211_stop_queue(rt2x00dev->hw, control->queue);
- return -EINVAL;
- }
-
- if (test_bit(ENTRY_OWNER_NIC, &entry->flags)) {
- ERROR(rt2x00dev,
- "Arrived at non-free entry in the non-full queue %d.\n"
- "Please file bug report to %s.\n",
- control->queue, DRV_PROJECT);
- ieee80211_stop_queue(rt2x00dev->hw, control->queue);
- return -EINVAL;
- }
-
- /*
- * Add the descriptor in front of the skb.
- */
- skb_push(skb, ring->desc_size);
- memset(skb->data, 0, ring->desc_size);
-
- rt2x00lib_write_tx_desc(rt2x00dev, (struct data_desc *)skb->data,
- (struct ieee80211_hdr *)(skb->data +
- ring->desc_size),
- skb->len - ring->desc_size, control);
- memcpy(&entry->tx_status.control, control, sizeof(*control));
- entry->skb = skb;
-
- /*
- * USB devices cannot blindly pass the skb->len as the
- * length of the data to usb_fill_bulk_urb. Pass the skb
- * to the driver to determine what the length should be.
- */
- length = rt2x00dev->ops->lib->get_tx_data_len(rt2x00dev, skb);
-
- /*
- * Initialize URB and send the frame to the device.
- */
- __set_bit(ENTRY_OWNER_NIC, &entry->flags);
- usb_fill_bulk_urb(entry->priv, usb_dev, pipe,
- skb->data, length, rt2x00usb_interrupt_txdone, entry);
- usb_submit_urb(entry->priv, GFP_ATOMIC);
-
- rt2x00_ring_index_inc(ring);
-
- if (rt2x00_ring_full(ring))
- ieee80211_stop_queue(rt2x00dev->hw, control->queue);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(rt2x00usb_write_tx_data);
-
-/*
- * RX data handlers.
- */
-static void rt2x00usb_interrupt_rxdone(struct urb *urb)
-{
- struct data_entry *entry = (struct data_entry *)urb->context;
- struct data_ring *ring = entry->ring;
- struct rt2x00_dev *rt2x00dev = ring->rt2x00dev;
- struct sk_buff *skb;
- struct ieee80211_hdr *hdr;
- struct rxdata_entry_desc desc;
- int header_size;
- int frame_size;
-
- if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
- !test_and_clear_bit(ENTRY_OWNER_NIC, &entry->flags))
- return;
-
- /*
- * 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->ring->desc_size || urb->status)
- goto skip_entry;
-
- memset(&desc, 0x00, sizeof(desc));
- rt2x00dev->ops->lib->fill_rxdone(entry, &desc);
-
- /*
- * Allocate a new sk buffer to replace the current one.
- * If allocation fails, we should drop the current frame
- * so we can recycle the existing sk buffer for the new frame.
- * As alignment we use 2 and not NET_IP_ALIGN because we need
- * to be sure we have 2 bytes room in the head. (NET_IP_ALIGN
- * can be 0 on some hardware). We use these 2 bytes for frame
- * alignment later, we assume that the chance that
- * header_size % 4 == 2 is bigger then header_size % 2 == 0
- * and thus optimize alignment by reserving the 2 bytes in
- * advance.
- */
- frame_size = entry->ring->data_size + entry->ring->desc_size;
- skb = dev_alloc_skb(frame_size + 2);
- if (!skb)
- goto skip_entry;
-
- skb_reserve(skb, 2);
- skb_put(skb, frame_size);
-
- /*
- * The data behind the ieee80211 header must be
- * aligned on a 4 byte boundary.
- * After that trim the entire buffer down to only
- * contain the valid frame data excluding the device
- * descriptor.
- */
- hdr = (struct ieee80211_hdr *)entry->skb->data;
- header_size =
- ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
-
- if (header_size % 4 == 0) {
- skb_push(entry->skb, 2);
- memmove(entry->skb->data, entry->skb->data + 2, skb->len - 2);
- }
- skb_trim(entry->skb, desc.size);
-
- /*
- * Send the frame to rt2x00lib for further processing.
- */
- rt2x00lib_rxdone(entry, entry->skb, &desc);
-
- /*
- * Replace current entry's skb with the newly allocated one,
- * and reinitialize the urb.
- */
- entry->skb = skb;
- urb->transfer_buffer = entry->skb->data;
- urb->transfer_buffer_length = entry->skb->len;
-
-skip_entry:
- if (test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags)) {
- __set_bit(ENTRY_OWNER_NIC, &entry->flags);
- usb_submit_urb(urb, GFP_ATOMIC);
- }
-
- rt2x00_ring_index_inc(ring);
-}
-
-/*
- * Radio handlers
- */
-void rt2x00usb_enable_radio(struct rt2x00_dev *rt2x00dev)
-{
- struct usb_device *usb_dev =
- interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
- struct data_ring *ring;
- struct data_entry *entry;
- unsigned int i;
-
- /*
- * Initialize the TX rings
- */
- txringall_for_each(rt2x00dev, ring) {
- for (i = 0; i < ring->stats.limit; i++)
- ring->entry[i].flags = 0;
-
- rt2x00_ring_index_clear(ring);
- }
-
- /*
- * Initialize and start the RX ring.
- */
- rt2x00_ring_index_clear(rt2x00dev->rx);
-
- for (i = 0; i < rt2x00dev->rx->stats.limit; i++) {
- entry = &rt2x00dev->rx->entry[i];
-
- usb_fill_bulk_urb(entry->priv, usb_dev,
- usb_rcvbulkpipe(usb_dev, 1),
- entry->skb->data, entry->skb->len,
- rt2x00usb_interrupt_rxdone, entry);
-
- __set_bit(ENTRY_OWNER_NIC, &entry->flags);
- usb_submit_urb(entry->priv, GFP_ATOMIC);
- }
-}
-EXPORT_SYMBOL_GPL(rt2x00usb_enable_radio);
-
-void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
-{
- struct data_ring *ring;
- unsigned int i;
-
- rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0x0000, 0x0000,
- REGISTER_TIMEOUT);
-
- /*
- * Cancel all rings.
- */
- ring_for_each(rt2x00dev, ring) {
- for (i = 0; i < ring->stats.limit; i++)
- usb_kill_urb(ring->entry[i].priv);
- }
-}
-EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
-
-/*
- * Device initialization handlers.
- */
-static int rt2x00usb_alloc_urb(struct rt2x00_dev *rt2x00dev,
- struct data_ring *ring)
-{
- unsigned int i;
-
- /*
- * Allocate the URB's
- */
- for (i = 0; i < ring->stats.limit; i++) {
- ring->entry[i].priv = usb_alloc_urb(0, GFP_KERNEL);
- if (!ring->entry[i].priv)
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static void rt2x00usb_free_urb(struct rt2x00_dev *rt2x00dev,
- struct data_ring *ring)
-{
- unsigned int i;
-
- if (!ring->entry)
- return;
-
- for (i = 0; i < ring->stats.limit; i++) {
- usb_kill_urb(ring->entry[i].priv);
- usb_free_urb(ring->entry[i].priv);
- if (ring->entry[i].skb)
- kfree_skb(ring->entry[i].skb);
- }
-}
-
-int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
-{
- struct data_ring *ring;
- struct sk_buff *skb;
- unsigned int entry_size;
- unsigned int i;
- int status;
-
- /*
- * Allocate DMA
- */
- ring_for_each(rt2x00dev, ring) {
- status = rt2x00usb_alloc_urb(rt2x00dev, ring);
- if (status)
- goto exit;
- }
-
- /*
- * For the RX ring, skb's should be allocated.
- */
- entry_size = rt2x00dev->rx->data_size + rt2x00dev->rx->desc_size;
- for (i = 0; i < rt2x00dev->rx->stats.limit; i++) {
- skb = dev_alloc_skb(NET_IP_ALIGN + entry_size);
- if (!skb)
- goto exit;
-
- skb_reserve(skb, NET_IP_ALIGN);
- skb_put(skb, entry_size);
-
- rt2x00dev->rx->entry[i].skb = skb;
- }
-
- return 0;
-
-exit:
- rt2x00usb_uninitialize(rt2x00dev);
-
- return status;
-}
-EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
-
-void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
-{
- struct data_ring *ring;
-
- ring_for_each(rt2x00dev, ring)
- rt2x00usb_free_urb(rt2x00dev, ring);
-}
-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:
- 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;
- rt2x00dev->ops = ops;
- rt2x00dev->hw = hw;
-
- 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 */
-
-/*
- * rt2x00pci module information.
- */
-MODULE_AUTHOR(DRV_PROJECT);
-MODULE_VERSION(DRV_VERSION);
-MODULE_DESCRIPTION("rt2x00 library");
-MODULE_LICENSE("GPL");
projects / openwrt / openwrt.git / blobdiff