/*
Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
<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, see <http://www.gnu.org/licenses/>.
*/
/*
Module: rt2x00usb
Abstract: Data structures for the rt2x00usb module.
*/
#ifndef RT2X00USB_H
#define RT2X00USB_H
#include <linux/usb.h>
#define to_usb_device_intf(d) \
({ \
struct usb_interface *intf = to_usb_interface(d); \
interface_to_usbdev(intf); \
})
/*
* For USB vendor requests we need to pass a timeout
* time in ms, for this we use the REGISTER_TIMEOUT,
* however when loading firmware a higher value is
* required. In that case we use the REGISTER_TIMEOUT_FIRMWARE.
*/
#define REGISTER_TIMEOUT 500
#define REGISTER_TIMEOUT_FIRMWARE 1000
/**
* REGISTER_TIMEOUT16 - Determine the timeout for 16bit register access
* @__datalen: Data length
*/
#define REGISTER_TIMEOUT16(__datalen) \
( REGISTER_TIMEOUT * ((__datalen) / sizeof(u16)) )
/**
* REGISTER_TIMEOUT32 - Determine the timeout for 32bit register access
* @__datalen: Data length
*/
#define REGISTER_TIMEOUT32(__datalen) \
( REGISTER_TIMEOUT * ((__datalen) / sizeof(u32)) )
/*
* Cache size
*/
#define CSR_CACHE_SIZE 64
/*
* USB request types.
*/
#define USB_VENDOR_REQUEST ( USB_TYPE_VENDOR | USB_RECIP_DEVICE )
#define USB_VENDOR_REQUEST_IN ( USB_DIR_IN | USB_VENDOR_REQUEST )
#define USB_VENDOR_REQUEST_OUT ( USB_DIR_OUT | USB_VENDOR_REQUEST )
/**
* enum rt2x00usb_vendor_request: USB vendor commands.
*/
enum rt2x00usb_vendor_request {
USB_DEVICE_MODE = 1,
USB_SINGLE_WRITE = 2,
USB_SINGLE_READ = 3,
USB_MULTI_WRITE = 6,
USB_MULTI_READ = 7,
USB_EEPROM_WRITE = 8,
USB_EEPROM_READ = 9,
USB_LED_CONTROL = 10, /* RT73USB */
USB_RX_CONTROL = 12,
};
/**
* enum rt2x00usb_mode_offset: Device modes offset.
*/
enum rt2x00usb_mode_offset {
USB_MODE_RESET = 1,
USB_MODE_UNPLUG = 2,
USB_MODE_FUNCTION = 3,
USB_MODE_TEST = 4,
USB_MODE_SLEEP = 7, /* RT73USB */
USB_MODE_FIRMWARE = 8, /* RT73USB */
USB_MODE_WAKEUP = 9, /* RT73USB */
};
/**
* rt2x00usb_vendor_request - Send register command to device
* @rt2x00dev: Pointer to &struct rt2x00_dev
* @request: USB vendor command (See &enum rt2x00usb_vendor_request)
* @requesttype: Request type &USB_VENDOR_REQUEST_*
* @offset: Register offset to perform action on
* @value: Value to write to device
* @buffer: Buffer where information will be read/written to by device
* @buffer_length: Size of &buffer
* @timeout: Operation timeout
*
* This is the main function to communicate with the device,
* the &buffer argument _must_ either be NULL or point to
* a buffer allocated by kmalloc. Failure to do so can lead
* to unexpected behavior depending on the architecture.
*/
int rt2x00usb_vendor_request(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);
/**
* rt2x00usb_vendor_request_buff - Send register command to device (buffered)
* @rt2x00dev: Pointer to &struct rt2x00_dev
* @request: USB vendor command (See &enum rt2x00usb_vendor_request)
* @requesttype: Request type &USB_VENDOR_REQUEST_*
* @offset: Register offset to perform action on
* @buffer: Buffer where information will be read/written to by device
* @buffer_length: Size of &buffer
* @timeout: Operation timeout
*
* This function will use a previously with kmalloc allocated cache
* to communicate with the device. The contents of the buffer pointer
* will be copied to this cache when writing, or read from the cache
* when reading.
* Buffers send to &rt2x00usb_vendor_request _must_ be allocated with
* kmalloc. Hence the reason for using a previously allocated cache
* which has been allocated properly.
*/
int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
const u8 request, const u8 requesttype,
const u16 offset, void *buffer,
const u16 buffer_length, const int timeout);
/**
* rt2x00usb_vendor_request_buff - Send register command to device (buffered)
* @rt2x00dev: Pointer to &struct rt2x00_dev
* @request: USB vendor command (See &enum rt2x00usb_vendor_request)
* @requesttype: Request type &USB_VENDOR_REQUEST_*
* @offset: Register offset to perform action on
* @buffer: Buffer where information will be read/written to by device
* @buffer_length: Size of &buffer
* @timeout: Operation timeout
*
* A version of &rt2x00usb_vendor_request_buff which must be called
* if the usb_cache_mutex is already held.
*/
int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
const u8 request, const u8 requesttype,
const u16 offset, void *buffer,
const u16 buffer_length, const int timeout);
/**
* rt2x00usb_vendor_request_sw - Send single register command to device
* @rt2x00dev: Pointer to &struct rt2x00_dev
* @request: USB vendor command (See &enum rt2x00usb_vendor_request)
* @offset: Register offset to perform action on
* @value: Value to write to device
* @timeout: Operation timeout
*
* Simple wrapper around rt2x00usb_vendor_request to write a single
* command to the device. Since we don't use the buffer argument we
* don't have to worry about kmalloc here.
*/
static inline int rt2x00usb_vendor_request_sw(struct rt2x00_dev *rt2x00dev,
const u8 request,
const u16 offset,
const u16 value,
const int timeout)
{
return rt2x00usb_vendor_request(rt2x00dev, request,
USB_VENDOR_REQUEST_OUT, offset,
value, NULL, 0, timeout);
}
/**
* rt2x00usb_eeprom_read - Read eeprom from device
* @rt2x00dev: Pointer to &struct rt2x00_dev
* @eeprom: Pointer to eeprom array to store the information in
* @length: Number of bytes to read from the eeprom
*
* Simple wrapper around rt2x00usb_vendor_request to read the eeprom
* from the device. Note that the eeprom argument _must_ be allocated using
* kmalloc for correct handling inside the kernel USB layer.
*/
static inline int rt2x00usb_eeprom_read(struct rt2x00_dev *rt2x00dev,
__le16 *eeprom, const u16 length)
{
return rt2x00usb_vendor_request(rt2x00dev, USB_EEPROM_READ,
USB_VENDOR_REQUEST_IN, 0, 0,
eeprom, length,
REGISTER_TIMEOUT16(length));
}
/**
* rt2x00usb_register_read - Read 32bit register word
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @value: Pointer to where register contents should be stored
*
* This function is a simple wrapper for 32bit register access
* through rt2x00usb_vendor_request_buff().
*/
static inline void rt2x00usb_register_read(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
u32 *value)
{
__le32 reg;
rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
USB_VENDOR_REQUEST_IN, offset,
®, sizeof(reg), REGISTER_TIMEOUT);
*value = le32_to_cpu(reg);
}
/**
* rt2x00usb_register_read_lock - Read 32bit register word
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @value: Pointer to where register contents should be stored
*
* This function is a simple wrapper for 32bit register access
* through rt2x00usb_vendor_req_buff_lock().
*/
static inline void rt2x00usb_register_read_lock(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
u32 *value)
{
__le32 reg;
rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_READ,
USB_VENDOR_REQUEST_IN, offset,
®, sizeof(reg), REGISTER_TIMEOUT);
*value = le32_to_cpu(reg);
}
/**
* rt2x00usb_register_multiread - Read 32bit register words
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @value: Pointer to where register contents should be stored
* @length: Length of the data
*
* This function is a simple wrapper for 32bit register access
* through rt2x00usb_vendor_request_buff().
*/
static inline void rt2x00usb_register_multiread(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
void *value, const u32 length)
{
rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
USB_VENDOR_REQUEST_IN, offset,
value, length,
REGISTER_TIMEOUT32(length));
}
/**
* rt2x00usb_register_write - Write 32bit register word
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @value: Data which should be written
*
* This function is a simple wrapper for 32bit register access
* through rt2x00usb_vendor_request_buff().
*/
static inline void rt2x00usb_register_write(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
u32 value)
{
__le32 reg = cpu_to_le32(value);
rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
USB_VENDOR_REQUEST_OUT, offset,
®, sizeof(reg), REGISTER_TIMEOUT);
}
/**
* rt2x00usb_register_write_lock - Write 32bit register word
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @value: Data which should be written
*
* This function is a simple wrapper for 32bit register access
* through rt2x00usb_vendor_req_buff_lock().
*/
static inline void rt2x00usb_register_write_lock(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
u32 value)
{
__le32 reg = cpu_to_le32(value);
rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_WRITE,
USB_VENDOR_REQUEST_OUT, offset,
®, sizeof(reg), REGISTER_TIMEOUT);
}
/**
* rt2x00usb_register_multiwrite - Write 32bit register words
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @value: Data which should be written
* @length: Length of the data
*
* This function is a simple wrapper for 32bit register access
* through rt2x00usb_vendor_request_buff().
*/
static inline void rt2x00usb_register_multiwrite(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
const void *value,
const u32 length)
{
rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
USB_VENDOR_REQUEST_OUT, offset,
(void *)value, length,
REGISTER_TIMEOUT32(length));
}
/**
* rt2x00usb_regbusy_read - Read from register with busy check
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @field: Field to check if register is busy
* @reg: Pointer to where register contents should be stored
*
* This function will read the given register, and checks if the
* register is busy. If it is, it will sleep for a couple of
* microseconds before reading the register again. If the register
* is not read after a certain timeout, this function will return
* FALSE.
*/
int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
const struct rt2x00_field32 field,
u32 *reg);
/**
* rt2x00usb_register_read_async - Asynchronously read 32bit register word
* @rt2x00dev: Device pointer, see &struct rt2x00_dev.
* @offset: Register offset
* @callback: Functon to call when read completes.
*
* Submit a control URB to read a 32bit register. This safe to
* be called from atomic context. The callback will be called
* when the URB completes. Otherwise the function is similar
* to rt2x00usb_register_read().
* When the callback function returns false, the memory will be cleaned up,
* when it returns true, the urb will be fired again.
*/
void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
const unsigned int offset,
bool (*callback)(struct rt2x00_dev*, int, u32));
/*
* Radio handlers
*/
void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev);
/**
* struct queue_entry_priv_usb: Per entry USB specific information
*
* @urb: Urb structure used for device communication.
*/
struct queue_entry_priv_usb {
struct urb *urb;
};
/**
* struct queue_entry_priv_usb_bcn: Per TX entry USB specific information
*
* The first section should match &struct queue_entry_priv_usb exactly.
* rt2500usb can use this structure to send a guardian byte when working
* with beacons.
*
* @urb: Urb structure used for device communication.
* @guardian_data: Set to 0, used for sending the guardian data.
* @guardian_urb: Urb structure used to send the guardian data.
*/
struct queue_entry_priv_usb_bcn {
struct urb *urb;
unsigned int guardian_data;
struct urb *guardian_urb;
};
/**
* rt2x00usb_kick_queue - Kick data queue
* @queue: Data queue to kick
*
* This will walk through all entries of the queue and push all pending
* frames to the hardware as a single burst.
*/
void rt2x00usb_kick_queue(struct data_queue *queue);
/**
* rt2x00usb_flush_queue - Flush data queue
* @queue: Data queue to stop
* @drop: True to drop all pending frames.
*
* This will walk through all entries of the queue and will optionally
* kill all URB's which were send to the device, or at least wait until
* they have been returned from the device..
*/
void rt2x00usb_flush_queue(struct data_queue *queue, bool drop);
/**
* rt2x00usb_watchdog - Watchdog for USB communication
* @rt2x00dev: Pointer to &struct rt2x00_dev
*
* Check the health of the USB communication and determine
* if timeouts have occurred. If this is the case, this function
* will reset all communication to restore functionality again.
*/
void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev);
/*
* Device initialization handlers.
*/
void rt2x00usb_clear_entry(struct queue_entry *entry);
int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev);
void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev);
/*
* USB driver handlers.
*/
int rt2x00usb_probe(struct usb_interface *usb_intf,
const struct rt2x00_ops *ops);
void rt2x00usb_disconnect(struct usb_interface *usb_intf);
#ifdef CONFIG_PM
int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state);
int rt2x00usb_resume(struct usb_interface *usb_intf);
#else
#define rt2x00usb_suspend NULL
#define rt2x00usb_resume NULL
#endif /* CONFIG_PM */
#endif /* RT2X00USB_H */