diff options
Diffstat (limited to 'package/rt2x00/src/rt2x00usb.c')
| -rw-r--r-- | package/rt2x00/src/rt2x00usb.c | 615 |
1 files changed, 0 insertions, 615 deletions
diff --git a/package/rt2x00/src/rt2x00usb.c b/package/rt2x00/src/rt2x00usb.c deleted file mode 100644 index 568d73847d..0000000000 --- a/package/rt2x00/src/rt2x00usb.c +++ /dev/null @@ -1,615 +0,0 @@ -/* - 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"); |