/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
Copyright ( C ) 2004 - 2009 Ivo van Doorn < IvDoorn @ gmail . com >
< http : //rt2x00.serialmonkey.com>
*/
/*
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 or read EEPROM
* a higher value is required . In that case we use the REGISTER_TIMEOUT_FIRMWARE
* and EEPROM_TIMEOUT .
*/
#define REGISTER_TIMEOUT 100
#define REGISTER_TIMEOUT_FIRMWARE 1000
#define EEPROM_TIMEOUT 2000
/*
* 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 */
USB_MODE_AUTORUN = 17 , /* RT2800USB */
};
/**
* 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
*
* 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);
/**
* 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, EEPROM_TIMEOUT);
}
/**
* rt2x00usb_register_read - Read 32 bit register word
* @ rt2x00dev : Device pointer , see & struct rt2x00_dev .
* @ offset : Register offset
*
* This function is a simple wrapper for 32 bit register access
* through rt2x00usb_vendor_request_buff ( ) .
*/
static inline u32 rt2x00usb_register_read(struct rt2x00_dev *rt2x00dev,
const unsigned int offset)
{
__le32 reg = 0 ;
rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
USB_VENDOR_REQUEST_IN, offset,
®, sizeof (reg));
return le32_to_cpu(reg);
}
/**
* rt2x00usb_register_read_lock - Read 32 bit register word
* @ rt2x00dev : Device pointer , see & struct rt2x00_dev .
* @ offset : Register offset
*
* This function is a simple wrapper for 32 bit register access
* through rt2x00usb_vendor_req_buff_lock ( ) .
*/
static inline u32 rt2x00usb_register_read_lock(struct rt2x00_dev *rt2x00dev,
const unsigned int offset)
{
__le32 reg = 0 ;
rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_READ,
USB_VENDOR_REQUEST_IN, offset,
®, sizeof (reg), REGISTER_TIMEOUT);
return le32_to_cpu(reg);
}
/**
* rt2x00usb_register_multiread - Read 32 bit 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 32 bit 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);
}
/**
* rt2x00usb_register_write - Write 32 bit 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 32 bit 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));
}
/**
* rt2x00usb_register_write_lock - Write 32 bit 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 32 bit 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 32 bit 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 32 bit 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);
}
/**
* 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 32 bit 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 32 bit 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 */
Messung V0.5 in Prozent C=92 H=100 G=95
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-10-02)
¤
*© Formatika GbR, Deutschland