forked from Minki/linux
e039fa4a41
This patch converts mac80211 and all drivers to have transmit information and status in skb->cb rather than allocating extra memory for it and copying all the data around. To make it fit, a union is used where only data that is necessary for all steps is kept outside of the union. A number of fixes were done by Ivo, as well as the rt2x00 part of this patch. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
273 lines
8.7 KiB
C
273 lines
8.7 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: Data structures for the rt2x00usb module.
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*/
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#ifndef RT2X00USB_H
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#define RT2X00USB_H
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/*
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* This variable should be used with the
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* usb_driver structure initialization.
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*/
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#define USB_DEVICE_DATA(__ops) .driver_info = (kernel_ulong_t)(__ops)
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/*
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* Register defines.
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* Some registers require multiple attempts before success,
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* in those cases REGISTER_BUSY_COUNT attempts should be
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* taken with a REGISTER_BUSY_DELAY interval.
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* For USB vendor requests we need to pass a timeout
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* time in ms, for this we use the REGISTER_TIMEOUT,
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* however when loading firmware a higher value is
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* required. In that case we use the REGISTER_TIMEOUT_FIRMWARE.
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*/
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#define REGISTER_BUSY_COUNT 5
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#define REGISTER_BUSY_DELAY 100
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#define REGISTER_TIMEOUT 500
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#define REGISTER_TIMEOUT_FIRMWARE 1000
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/**
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* REGISTER_TIMEOUT16 - Determine the timeout for 16bit register access
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* @__datalen: Data length
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*/
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#define REGISTER_TIMEOUT16(__datalen) \
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( REGISTER_TIMEOUT * ((__datalen) / sizeof(u16)) )
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/**
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* REGISTER_TIMEOUT32 - Determine the timeout for 32bit register access
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* @__datalen: Data length
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*/
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#define REGISTER_TIMEOUT32(__datalen) \
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( REGISTER_TIMEOUT * ((__datalen) / sizeof(u32)) )
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/*
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* Cache size
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*/
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#define CSR_CACHE_SIZE 8
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#define CSR_CACHE_SIZE_FIRMWARE 64
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/*
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* USB request types.
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*/
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#define USB_VENDOR_REQUEST ( USB_TYPE_VENDOR | USB_RECIP_DEVICE )
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#define USB_VENDOR_REQUEST_IN ( USB_DIR_IN | USB_VENDOR_REQUEST )
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#define USB_VENDOR_REQUEST_OUT ( USB_DIR_OUT | USB_VENDOR_REQUEST )
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/**
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* enum rt2x00usb_vendor_request: USB vendor commands.
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*/
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enum rt2x00usb_vendor_request {
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USB_DEVICE_MODE = 1,
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USB_SINGLE_WRITE = 2,
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USB_SINGLE_READ = 3,
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USB_MULTI_WRITE = 6,
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USB_MULTI_READ = 7,
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USB_EEPROM_WRITE = 8,
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USB_EEPROM_READ = 9,
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USB_LED_CONTROL = 10, /* RT73USB */
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USB_RX_CONTROL = 12,
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};
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/**
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* enum rt2x00usb_mode_offset: Device modes offset.
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*/
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enum rt2x00usb_mode_offset {
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USB_MODE_RESET = 1,
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USB_MODE_UNPLUG = 2,
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USB_MODE_FUNCTION = 3,
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USB_MODE_TEST = 4,
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USB_MODE_SLEEP = 7, /* RT73USB */
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USB_MODE_FIRMWARE = 8, /* RT73USB */
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USB_MODE_WAKEUP = 9, /* RT73USB */
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};
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/**
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* rt2x00usb_vendor_request - Send register command to device
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* @rt2x00dev: Pointer to &struct rt2x00_dev
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* @request: USB vendor command (See &enum rt2x00usb_vendor_request)
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* @requesttype: Request type &USB_VENDOR_REQUEST_*
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* @offset: Register offset to perform action on
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* @value: Value to write to device
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* @buffer: Buffer where information will be read/written to by device
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* @buffer_length: Size of &buffer
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* @timeout: Operation timeout
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*
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* This is the main function to communicate with the device,
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* the &buffer argument _must_ either be NULL or point to
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* a buffer allocated by kmalloc. Failure to do so can lead
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* to unexpected behavior depending on the architecture.
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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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* rt2x00usb_vendor_request_buff - Send register command to device (buffered)
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* @rt2x00dev: Pointer to &struct rt2x00_dev
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* @request: USB vendor command (See &enum rt2x00usb_vendor_request)
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* @requesttype: Request type &USB_VENDOR_REQUEST_*
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* @offset: Register offset to perform action on
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* @buffer: Buffer where information will be read/written to by device
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* @buffer_length: Size of &buffer
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* @timeout: Operation timeout
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*
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* This function will use a previously with kmalloc allocated cache
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* to communicate with the device. The contents of the buffer pointer
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* will be copied to this cache when writing, or read from the cache
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* when reading.
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* Buffers send to &rt2x00usb_vendor_request _must_ be allocated with
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* kmalloc. Hence the reason for using a previously allocated cache
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* which has been allocated properly.
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*/
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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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* rt2x00usb_vendor_request_buff - Send register command to device (buffered)
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* @rt2x00dev: Pointer to &struct rt2x00_dev
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* @request: USB vendor command (See &enum rt2x00usb_vendor_request)
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* @requesttype: Request type &USB_VENDOR_REQUEST_*
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* @offset: Register offset to perform action on
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* @buffer: Buffer where information will be read/written to by device
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* @buffer_length: Size of &buffer
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* @timeout: Operation timeout
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*
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* A version of &rt2x00usb_vendor_request_buff which must be called
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* if the usb_cache_mutex is already held.
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*/
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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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* rt2x00usb_vendor_request_sw - Send single register command to device
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* @rt2x00dev: Pointer to &struct rt2x00_dev
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* @request: USB vendor command (See &enum rt2x00usb_vendor_request)
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* @offset: Register offset to perform action on
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* @value: Value to write to device
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* @timeout: Operation timeout
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*
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* Simple wrapper around rt2x00usb_vendor_request to write a single
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* command to the device. Since we don't use the buffer argument we
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* don't have to worry about kmalloc here.
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*/
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static inline int rt2x00usb_vendor_request_sw(struct rt2x00_dev *rt2x00dev,
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const u8 request,
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const u16 offset,
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const u16 value,
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const int timeout)
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{
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return rt2x00usb_vendor_request(rt2x00dev, request,
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USB_VENDOR_REQUEST_OUT, offset,
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value, NULL, 0, timeout);
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}
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/**
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* rt2x00usb_eeprom_read - Read eeprom from device
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* @rt2x00dev: Pointer to &struct rt2x00_dev
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* @eeprom: Pointer to eeprom array to store the information in
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* @length: Number of bytes to read from the eeprom
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*
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* Simple wrapper around rt2x00usb_vendor_request to read the eeprom
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* from the device. Note that the eeprom argument _must_ be allocated using
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* kmalloc for correct handling inside the kernel USB layer.
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*/
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static inline int rt2x00usb_eeprom_read(struct rt2x00_dev *rt2x00dev,
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__le16 *eeprom, const u16 length)
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{
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return rt2x00usb_vendor_request(rt2x00dev, USB_EEPROM_READ,
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USB_VENDOR_REQUEST_IN, 0, 0,
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eeprom, length,
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REGISTER_TIMEOUT16(length));
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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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* TX data handlers.
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*/
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int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
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struct data_queue *queue, struct sk_buff *skb);
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/**
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* struct queue_entry_priv_usb: Per entry USB specific information
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*
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* @urb: Urb structure used for device communication.
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*/
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struct queue_entry_priv_usb {
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struct urb *urb;
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};
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/**
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* struct queue_entry_priv_usb_bcn: Per TX entry USB specific information
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*
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* The first section should match &struct queue_entry_priv_usb exactly.
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* rt2500usb can use this structure to send a guardian byte when working
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* with beacons.
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*
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* @urb: Urb structure used for device communication.
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* @guardian_data: Set to 0, used for sending the guardian data.
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* @guardian_urb: Urb structure used to send the guardian data.
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*/
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struct queue_entry_priv_usb_bcn {
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struct urb *urb;
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unsigned int guardian_data;
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struct urb *guardian_urb;
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};
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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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void rt2x00usb_init_txentry(struct rt2x00_dev *rt2x00dev,
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struct queue_entry *entry);
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int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev);
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void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev);
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/*
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* USB driver handlers.
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*/
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int rt2x00usb_probe(struct usb_interface *usb_intf,
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const struct usb_device_id *id);
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void rt2x00usb_disconnect(struct usb_interface *usb_intf);
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#ifdef CONFIG_PM
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int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state);
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int rt2x00usb_resume(struct usb_interface *usb_intf);
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#else
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#define rt2x00usb_suspend NULL
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#define rt2x00usb_resume NULL
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#endif /* CONFIG_PM */
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#endif /* RT2X00USB_H */
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