/* * 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
/** * 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, constint 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, constint 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.
*/ staticinlineint rt2x00usb_vendor_request_sw(struct rt2x00_dev *rt2x00dev, const u8 request, const u16 offset, const u16 value, constint 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.
*/ staticinlineint 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 32bit register word * @rt2x00dev: Device pointer, see &struct rt2x00_dev. * @offset: Register offset * * This function is a simple wrapper for 32bit register access * through rt2x00usb_vendor_request_buff().
*/ staticinline u32 rt2x00usb_register_read(struct rt2x00_dev *rt2x00dev, constunsignedint 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 32bit register word * @rt2x00dev: Device pointer, see &struct rt2x00_dev. * @offset: Register offset * * This function is a simple wrapper for 32bit register access * through rt2x00usb_vendor_req_buff_lock().
*/ staticinline u32 rt2x00usb_register_read_lock(struct rt2x00_dev *rt2x00dev, constunsignedint 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 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().
*/ staticinlinevoid rt2x00usb_register_multiread(struct rt2x00_dev *rt2x00dev, constunsignedint 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 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().
*/ staticinlinevoid rt2x00usb_register_write(struct rt2x00_dev *rt2x00dev, constunsignedint 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 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().
*/ staticinlinevoid rt2x00usb_register_write_lock(struct rt2x00_dev *rt2x00dev, constunsignedint 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().
*/ staticinlinevoid rt2x00usb_register_multiwrite(struct rt2x00_dev *rt2x00dev, constunsignedint offset, constvoid *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, constunsignedint offset, conststruct 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, constunsignedint 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;
/** * 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);
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