| /* |
| 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 */ |
| 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 |
| * @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 */ |
