diff options
Diffstat (limited to 'drivers/net/wireless/ralink/rt2x00/rt2x00usb.h')
| -rw-r--r-- | drivers/net/wireless/ralink/rt2x00/rt2x00usb.h | 424 |
1 files changed, 424 insertions, 0 deletions
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.h b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.h new file mode 100644 index 000000000000..569363da00a2 --- /dev/null +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.h @@ -0,0 +1,424 @@ +/* + 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 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 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 = 0; + rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ, + USB_VENDOR_REQUEST_IN, offset, + ®, sizeof(reg)); + *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 = 0; + 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); +} + +/** + * 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)); +} + +/** + * 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); +} + +/** + * 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 */ |