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858 lines
23 KiB
858 lines
23 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* drivers/media/radio/si470x/radio-si470x-usb.c |
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* |
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* USB driver for radios with Silicon Labs Si470x FM Radio Receivers |
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* |
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* Copyright (c) 2009 Tobias Lorenz <[email protected]> |
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*/ |
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/* |
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* ToDo: |
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* - add firmware download/update support |
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*/ |
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/* driver definitions */ |
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#define DRIVER_AUTHOR "Tobias Lorenz <[email protected]>" |
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#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver" |
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#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers" |
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#define DRIVER_VERSION "1.0.10" |
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/* kernel includes */ |
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#include <linux/usb.h> |
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#include <linux/hid.h> |
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#include <linux/slab.h> |
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#include "radio-si470x.h" |
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/* USB Device ID List */ |
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static const struct usb_device_id si470x_usb_driver_id_table[] = { |
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/* Silicon Labs USB FM Radio Reference Design */ |
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{ USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) }, |
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/* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */ |
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{ USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) }, |
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/* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */ |
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{ USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) }, |
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/* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */ |
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{ USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) }, |
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/* Axentia ALERT FM USB Receiver */ |
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{ USB_DEVICE_AND_INTERFACE_INFO(0x12cf, 0x7111, USB_CLASS_HID, 0, 0) }, |
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/* Terminating entry */ |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table); |
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/************************************************************************** |
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* Module Parameters |
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**************************************************************************/ |
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/* Radio Nr */ |
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static int radio_nr = -1; |
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module_param(radio_nr, int, 0444); |
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MODULE_PARM_DESC(radio_nr, "Radio Nr"); |
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/* USB timeout */ |
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static unsigned int usb_timeout = 500; |
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module_param(usb_timeout, uint, 0644); |
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MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*"); |
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/* RDS buffer blocks */ |
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static unsigned int rds_buf = 100; |
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module_param(rds_buf, uint, 0444); |
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MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*"); |
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/* RDS maximum block errors */ |
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static unsigned short max_rds_errors = 1; |
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/* 0 means 0 errors requiring correction */ |
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/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */ |
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/* 2 means 3-5 errors requiring correction */ |
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/* 3 means 6+ errors or errors in checkword, correction not possible */ |
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module_param(max_rds_errors, ushort, 0644); |
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MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*"); |
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/************************************************************************** |
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* USB HID Reports |
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**************************************************************************/ |
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/* Reports 1-16 give direct read/write access to the 16 Si470x registers */ |
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/* with the (REPORT_ID - 1) corresponding to the register address across USB */ |
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/* endpoint 0 using GET_REPORT and SET_REPORT */ |
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#define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1) |
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#define REGISTER_REPORT(reg) ((reg) + 1) |
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/* Report 17 gives direct read/write access to the entire Si470x register */ |
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/* map across endpoint 0 using GET_REPORT and SET_REPORT */ |
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#define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) |
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#define ENTIRE_REPORT 17 |
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/* Report 18 is used to send the lowest 6 Si470x registers up the HID */ |
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/* interrupt endpoint 1 to Windows every 20 milliseconds for status */ |
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#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) |
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#define RDS_REPORT 18 |
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/* Report 19: LED state */ |
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#define LED_REPORT_SIZE 3 |
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#define LED_REPORT 19 |
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/* Report 19: stream */ |
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#define STREAM_REPORT_SIZE 3 |
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#define STREAM_REPORT 19 |
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/* Report 20: scratch */ |
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#define SCRATCH_PAGE_SIZE 63 |
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#define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1) |
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#define SCRATCH_REPORT 20 |
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/* Reports 19-22: flash upgrade of the C8051F321 */ |
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#define WRITE_REPORT_SIZE 4 |
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#define WRITE_REPORT 19 |
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#define FLASH_REPORT_SIZE 64 |
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#define FLASH_REPORT 20 |
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#define CRC_REPORT_SIZE 3 |
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#define CRC_REPORT 21 |
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#define RESPONSE_REPORT_SIZE 2 |
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#define RESPONSE_REPORT 22 |
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/* Report 23: currently unused, but can accept 60 byte reports on the HID */ |
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/* interrupt out endpoint 2 every 1 millisecond */ |
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#define UNUSED_REPORT 23 |
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#define MAX_REPORT_SIZE 64 |
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/************************************************************************** |
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* Software/Hardware Versions from Scratch Page |
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**************************************************************************/ |
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#define RADIO_HW_VERSION 1 |
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/************************************************************************** |
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* LED State Definitions |
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**************************************************************************/ |
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#define LED_COMMAND 0x35 |
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#define NO_CHANGE_LED 0x00 |
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#define ALL_COLOR_LED 0x01 /* streaming state */ |
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#define BLINK_GREEN_LED 0x02 /* connect state */ |
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#define BLINK_RED_LED 0x04 |
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#define BLINK_ORANGE_LED 0x10 /* disconnect state */ |
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#define SOLID_GREEN_LED 0x20 /* tuning/seeking state */ |
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#define SOLID_RED_LED 0x40 /* bootload state */ |
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#define SOLID_ORANGE_LED 0x80 |
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/************************************************************************** |
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* Stream State Definitions |
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**************************************************************************/ |
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#define STREAM_COMMAND 0x36 |
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#define STREAM_VIDPID 0x00 |
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#define STREAM_AUDIO 0xff |
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/************************************************************************** |
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* Bootloader / Flash Commands |
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**************************************************************************/ |
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/* unique id sent to bootloader and required to put into a bootload state */ |
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#define UNIQUE_BL_ID 0x34 |
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/* mask for the flash data */ |
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#define FLASH_DATA_MASK 0x55 |
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/* bootloader commands */ |
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#define GET_SW_VERSION_COMMAND 0x00 |
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#define SET_PAGE_COMMAND 0x01 |
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#define ERASE_PAGE_COMMAND 0x02 |
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#define WRITE_PAGE_COMMAND 0x03 |
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#define CRC_ON_PAGE_COMMAND 0x04 |
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#define READ_FLASH_BYTE_COMMAND 0x05 |
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#define RESET_DEVICE_COMMAND 0x06 |
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#define GET_HW_VERSION_COMMAND 0x07 |
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#define BLANK 0xff |
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/* bootloader command responses */ |
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#define COMMAND_OK 0x01 |
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#define COMMAND_FAILED 0x02 |
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#define COMMAND_PENDING 0x03 |
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/************************************************************************** |
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* General Driver Functions - REGISTER_REPORTs |
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**************************************************************************/ |
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/* |
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* si470x_get_report - receive a HID report |
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*/ |
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static int si470x_get_report(struct si470x_device *radio, void *buf, int size) |
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{ |
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unsigned char *report = buf; |
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int retval; |
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retval = usb_control_msg(radio->usbdev, |
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usb_rcvctrlpipe(radio->usbdev, 0), |
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HID_REQ_GET_REPORT, |
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
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report[0], 2, |
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buf, size, usb_timeout); |
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if (retval < 0) |
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dev_warn(&radio->intf->dev, |
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"si470x_get_report: usb_control_msg returned %d\n", |
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retval); |
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return retval; |
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} |
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/* |
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* si470x_set_report - send a HID report |
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*/ |
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static int si470x_set_report(struct si470x_device *radio, void *buf, int size) |
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{ |
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unsigned char *report = buf; |
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int retval; |
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retval = usb_control_msg(radio->usbdev, |
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usb_sndctrlpipe(radio->usbdev, 0), |
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HID_REQ_SET_REPORT, |
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT, |
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report[0], 2, |
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buf, size, usb_timeout); |
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if (retval < 0) |
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dev_warn(&radio->intf->dev, |
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"si470x_set_report: usb_control_msg returned %d\n", |
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retval); |
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return retval; |
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} |
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/* |
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* si470x_get_register - read register |
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*/ |
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static int si470x_get_register(struct si470x_device *radio, int regnr) |
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{ |
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int retval; |
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radio->usb_buf[0] = REGISTER_REPORT(regnr); |
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retval = si470x_get_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE); |
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if (retval >= 0) |
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radio->registers[regnr] = get_unaligned_be16(&radio->usb_buf[1]); |
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return (retval < 0) ? -EINVAL : 0; |
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} |
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/* |
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* si470x_set_register - write register |
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*/ |
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static int si470x_set_register(struct si470x_device *radio, int regnr) |
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{ |
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int retval; |
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radio->usb_buf[0] = REGISTER_REPORT(regnr); |
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put_unaligned_be16(radio->registers[regnr], &radio->usb_buf[1]); |
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retval = si470x_set_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE); |
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return (retval < 0) ? -EINVAL : 0; |
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} |
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/************************************************************************** |
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* General Driver Functions - ENTIRE_REPORT |
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**************************************************************************/ |
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/* |
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* si470x_get_all_registers - read entire registers |
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*/ |
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static int si470x_get_all_registers(struct si470x_device *radio) |
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{ |
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int retval; |
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unsigned char regnr; |
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radio->usb_buf[0] = ENTIRE_REPORT; |
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retval = si470x_get_report(radio, radio->usb_buf, ENTIRE_REPORT_SIZE); |
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if (retval >= 0) |
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for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++) |
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radio->registers[regnr] = get_unaligned_be16( |
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&radio->usb_buf[regnr * RADIO_REGISTER_SIZE + 1]); |
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return (retval < 0) ? -EINVAL : 0; |
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} |
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/************************************************************************** |
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* General Driver Functions - LED_REPORT |
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**************************************************************************/ |
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/* |
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* si470x_set_led_state - sets the led state |
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*/ |
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static int si470x_set_led_state(struct si470x_device *radio, |
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unsigned char led_state) |
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{ |
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int retval; |
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radio->usb_buf[0] = LED_REPORT; |
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radio->usb_buf[1] = LED_COMMAND; |
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radio->usb_buf[2] = led_state; |
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retval = si470x_set_report(radio, radio->usb_buf, LED_REPORT_SIZE); |
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return (retval < 0) ? -EINVAL : 0; |
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} |
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/************************************************************************** |
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* General Driver Functions - SCRATCH_REPORT |
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**************************************************************************/ |
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/* |
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* si470x_get_scratch_versions - gets the scratch page and version infos |
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*/ |
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static int si470x_get_scratch_page_versions(struct si470x_device *radio) |
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{ |
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int retval; |
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radio->usb_buf[0] = SCRATCH_REPORT; |
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retval = si470x_get_report(radio, radio->usb_buf, SCRATCH_REPORT_SIZE); |
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if (retval < 0) |
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dev_warn(&radio->intf->dev, "si470x_get_scratch: si470x_get_report returned %d\n", |
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retval); |
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else { |
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radio->software_version = radio->usb_buf[1]; |
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radio->hardware_version = radio->usb_buf[2]; |
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} |
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return (retval < 0) ? -EINVAL : 0; |
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} |
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/************************************************************************** |
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* RDS Driver Functions |
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**************************************************************************/ |
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/* |
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* si470x_int_in_callback - rds callback and processing function |
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* |
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* TODO: do we need to use mutex locks in some sections? |
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*/ |
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static void si470x_int_in_callback(struct urb *urb) |
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{ |
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struct si470x_device *radio = urb->context; |
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int retval; |
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unsigned char regnr; |
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unsigned char blocknum; |
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unsigned short bler; /* rds block errors */ |
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unsigned short rds; |
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unsigned char tmpbuf[3]; |
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if (urb->status) { |
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if (urb->status == -ENOENT || |
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urb->status == -ECONNRESET || |
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urb->status == -ESHUTDOWN) { |
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return; |
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} else { |
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dev_warn(&radio->intf->dev, |
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"non-zero urb status (%d)\n", urb->status); |
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goto resubmit; /* Maybe we can recover. */ |
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} |
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} |
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/* Sometimes the device returns len 0 packets */ |
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if (urb->actual_length != RDS_REPORT_SIZE) |
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goto resubmit; |
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radio->registers[STATUSRSSI] = |
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get_unaligned_be16(&radio->int_in_buffer[1]); |
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if (radio->registers[STATUSRSSI] & STATUSRSSI_STC) |
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complete(&radio->completion); |
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if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)) { |
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/* Update RDS registers with URB data */ |
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for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++) |
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radio->registers[STATUSRSSI + regnr] = |
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get_unaligned_be16(&radio->int_in_buffer[ |
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regnr * RADIO_REGISTER_SIZE + 1]); |
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/* get rds blocks */ |
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if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) { |
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/* No RDS group ready, better luck next time */ |
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goto resubmit; |
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} |
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if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) { |
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/* RDS decoder not synchronized */ |
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goto resubmit; |
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} |
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for (blocknum = 0; blocknum < 4; blocknum++) { |
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switch (blocknum) { |
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default: |
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bler = (radio->registers[STATUSRSSI] & |
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STATUSRSSI_BLERA) >> 9; |
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rds = radio->registers[RDSA]; |
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break; |
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case 1: |
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bler = (radio->registers[READCHAN] & |
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READCHAN_BLERB) >> 14; |
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rds = radio->registers[RDSB]; |
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break; |
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case 2: |
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bler = (radio->registers[READCHAN] & |
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READCHAN_BLERC) >> 12; |
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rds = radio->registers[RDSC]; |
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break; |
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case 3: |
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bler = (radio->registers[READCHAN] & |
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READCHAN_BLERD) >> 10; |
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rds = radio->registers[RDSD]; |
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break; |
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} |
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/* Fill the V4L2 RDS buffer */ |
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put_unaligned_le16(rds, &tmpbuf); |
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tmpbuf[2] = blocknum; /* offset name */ |
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tmpbuf[2] |= blocknum << 3; /* received offset */ |
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if (bler > max_rds_errors) |
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tmpbuf[2] |= 0x80; /* uncorrectable errors */ |
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else if (bler > 0) |
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tmpbuf[2] |= 0x40; /* corrected error(s) */ |
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/* copy RDS block to internal buffer */ |
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memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3); |
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radio->wr_index += 3; |
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/* wrap write pointer */ |
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if (radio->wr_index >= radio->buf_size) |
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radio->wr_index = 0; |
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/* check for overflow */ |
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if (radio->wr_index == radio->rd_index) { |
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/* increment and wrap read pointer */ |
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radio->rd_index += 3; |
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if (radio->rd_index >= radio->buf_size) |
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radio->rd_index = 0; |
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} |
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} |
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if (radio->wr_index != radio->rd_index) |
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wake_up_interruptible(&radio->read_queue); |
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} |
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resubmit: |
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/* Resubmit if we're still running. */ |
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if (radio->int_in_running && radio->usbdev) { |
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retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC); |
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if (retval) { |
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dev_warn(&radio->intf->dev, |
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"resubmitting urb failed (%d)", retval); |
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radio->int_in_running = 0; |
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} |
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} |
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radio->status_rssi_auto_update = radio->int_in_running; |
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} |
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static int si470x_fops_open(struct file *file) |
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{ |
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return v4l2_fh_open(file); |
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} |
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static int si470x_fops_release(struct file *file) |
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{ |
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return v4l2_fh_release(file); |
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} |
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static void si470x_usb_release(struct v4l2_device *v4l2_dev) |
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{ |
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struct si470x_device *radio = |
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container_of(v4l2_dev, struct si470x_device, v4l2_dev); |
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usb_free_urb(radio->int_in_urb); |
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v4l2_ctrl_handler_free(&radio->hdl); |
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v4l2_device_unregister(&radio->v4l2_dev); |
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kfree(radio->int_in_buffer); |
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kfree(radio->buffer); |
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kfree(radio->usb_buf); |
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kfree(radio); |
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} |
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/************************************************************************** |
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* Video4Linux Interface |
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**************************************************************************/ |
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/* |
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* si470x_vidioc_querycap - query device capabilities |
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*/ |
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static int si470x_vidioc_querycap(struct file *file, void *priv, |
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struct v4l2_capability *capability) |
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{ |
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struct si470x_device *radio = video_drvdata(file); |
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strscpy(capability->driver, DRIVER_NAME, sizeof(capability->driver)); |
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strscpy(capability->card, DRIVER_CARD, sizeof(capability->card)); |
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usb_make_path(radio->usbdev, capability->bus_info, |
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sizeof(capability->bus_info)); |
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return 0; |
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} |
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static int si470x_start_usb(struct si470x_device *radio) |
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{ |
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int retval; |
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/* initialize interrupt urb */ |
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usb_fill_int_urb(radio->int_in_urb, radio->usbdev, |
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usb_rcvintpipe(radio->usbdev, |
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radio->int_in_endpoint->bEndpointAddress), |
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radio->int_in_buffer, |
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le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize), |
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si470x_int_in_callback, |
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radio, |
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radio->int_in_endpoint->bInterval); |
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radio->int_in_running = 1; |
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mb(); |
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retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL); |
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if (retval) { |
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dev_info(&radio->intf->dev, |
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"submitting int urb failed (%d)\n", retval); |
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radio->int_in_running = 0; |
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} |
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radio->status_rssi_auto_update = radio->int_in_running; |
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/* start radio */ |
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retval = si470x_start(radio); |
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if (retval < 0) |
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return retval; |
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v4l2_ctrl_handler_setup(&radio->hdl); |
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return retval; |
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} |
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/************************************************************************** |
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* USB Interface |
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**************************************************************************/ |
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/* |
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* si470x_usb_driver_probe - probe for the device |
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*/ |
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static int si470x_usb_driver_probe(struct usb_interface *intf, |
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const struct usb_device_id *id) |
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{ |
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struct si470x_device *radio; |
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struct usb_host_interface *iface_desc; |
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struct usb_endpoint_descriptor *endpoint; |
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int i, int_end_size, retval; |
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unsigned char version_warning = 0; |
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/* private data allocation and initialization */ |
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radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL); |
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if (!radio) { |
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retval = -ENOMEM; |
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goto err_initial; |
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} |
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radio->usb_buf = kmalloc(MAX_REPORT_SIZE, GFP_KERNEL); |
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if (radio->usb_buf == NULL) { |
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retval = -ENOMEM; |
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goto err_radio; |
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} |
|
radio->usbdev = interface_to_usbdev(intf); |
|
radio->intf = intf; |
|
radio->band = 1; /* Default to 76 - 108 MHz */ |
|
mutex_init(&radio->lock); |
|
init_completion(&radio->completion); |
|
|
|
radio->get_register = si470x_get_register; |
|
radio->set_register = si470x_set_register; |
|
radio->fops_open = si470x_fops_open; |
|
radio->fops_release = si470x_fops_release; |
|
radio->vidioc_querycap = si470x_vidioc_querycap; |
|
|
|
iface_desc = intf->cur_altsetting; |
|
|
|
/* Set up interrupt endpoint information. */ |
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
|
endpoint = &iface_desc->endpoint[i].desc; |
|
if (usb_endpoint_is_int_in(endpoint)) |
|
radio->int_in_endpoint = endpoint; |
|
} |
|
if (!radio->int_in_endpoint) { |
|
dev_info(&intf->dev, "could not find interrupt in endpoint\n"); |
|
retval = -EIO; |
|
goto err_usbbuf; |
|
} |
|
|
|
int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize); |
|
|
|
radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL); |
|
if (!radio->int_in_buffer) { |
|
dev_info(&intf->dev, "could not allocate int_in_buffer"); |
|
retval = -ENOMEM; |
|
goto err_usbbuf; |
|
} |
|
|
|
radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL); |
|
if (!radio->int_in_urb) { |
|
retval = -ENOMEM; |
|
goto err_intbuffer; |
|
} |
|
|
|
radio->v4l2_dev.release = si470x_usb_release; |
|
|
|
/* |
|
* The si470x SiLabs reference design uses the same USB IDs as |
|
* 'Thanko's Raremono' si4734 based receiver. So check here which we |
|
* have: attempt to read the device ID from the si470x: the lower 12 |
|
* bits should be 0x0242 for the si470x. |
|
* |
|
* We use this check to determine which device we are dealing with. |
|
*/ |
|
if (id->idVendor == 0x10c4 && id->idProduct == 0x818a) { |
|
retval = usb_control_msg(radio->usbdev, |
|
usb_rcvctrlpipe(radio->usbdev, 0), |
|
HID_REQ_GET_REPORT, |
|
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
|
1, 2, |
|
radio->usb_buf, 3, 500); |
|
if (retval != 3 || |
|
(get_unaligned_be16(&radio->usb_buf[1]) & 0xfff) != 0x0242) { |
|
dev_info(&intf->dev, "this is not a si470x device.\n"); |
|
retval = -ENODEV; |
|
goto err_urb; |
|
} |
|
} |
|
|
|
retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev); |
|
if (retval < 0) { |
|
dev_err(&intf->dev, "couldn't register v4l2_device\n"); |
|
goto err_urb; |
|
} |
|
|
|
v4l2_ctrl_handler_init(&radio->hdl, 2); |
|
v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops, |
|
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); |
|
v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops, |
|
V4L2_CID_AUDIO_VOLUME, 0, 15, 1, 15); |
|
if (radio->hdl.error) { |
|
retval = radio->hdl.error; |
|
dev_err(&intf->dev, "couldn't register control\n"); |
|
goto err_dev; |
|
} |
|
radio->videodev = si470x_viddev_template; |
|
radio->videodev.ctrl_handler = &radio->hdl; |
|
radio->videodev.lock = &radio->lock; |
|
radio->videodev.v4l2_dev = &radio->v4l2_dev; |
|
radio->videodev.release = video_device_release_empty; |
|
radio->videodev.device_caps = |
|
V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE | V4L2_CAP_TUNER | |
|
V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE; |
|
video_set_drvdata(&radio->videodev, radio); |
|
|
|
/* get device and chip versions */ |
|
if (si470x_get_all_registers(radio) < 0) { |
|
retval = -EIO; |
|
goto err_ctrl; |
|
} |
|
dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n", |
|
radio->registers[DEVICEID], radio->registers[SI_CHIPID]); |
|
if ((radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE) < RADIO_FW_VERSION) { |
|
dev_warn(&intf->dev, |
|
"This driver is known to work with firmware version %hu,\n", |
|
RADIO_FW_VERSION); |
|
dev_warn(&intf->dev, |
|
"but the device has firmware version %hu.\n", |
|
radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE); |
|
version_warning = 1; |
|
} |
|
|
|
/* get software and hardware versions */ |
|
if (si470x_get_scratch_page_versions(radio) < 0) { |
|
retval = -EIO; |
|
goto err_ctrl; |
|
} |
|
dev_info(&intf->dev, "software version %d, hardware version %d\n", |
|
radio->software_version, radio->hardware_version); |
|
if (radio->hardware_version < RADIO_HW_VERSION) { |
|
dev_warn(&intf->dev, |
|
"This driver is known to work with hardware version %hu,\n", |
|
RADIO_HW_VERSION); |
|
dev_warn(&intf->dev, |
|
"but the device has hardware version %hu.\n", |
|
radio->hardware_version); |
|
version_warning = 1; |
|
} |
|
|
|
/* give out version warning */ |
|
if (version_warning == 1) { |
|
dev_warn(&intf->dev, |
|
"If you have some trouble using this driver,\n"); |
|
dev_warn(&intf->dev, |
|
"please report to V4L ML at [email protected]\n"); |
|
} |
|
|
|
/* set led to connect state */ |
|
si470x_set_led_state(radio, BLINK_GREEN_LED); |
|
|
|
/* rds buffer allocation */ |
|
radio->buf_size = rds_buf * 3; |
|
radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL); |
|
if (!radio->buffer) { |
|
retval = -EIO; |
|
goto err_ctrl; |
|
} |
|
|
|
/* rds buffer configuration */ |
|
radio->wr_index = 0; |
|
radio->rd_index = 0; |
|
init_waitqueue_head(&radio->read_queue); |
|
usb_set_intfdata(intf, radio); |
|
|
|
/* start radio */ |
|
retval = si470x_start_usb(radio); |
|
if (retval < 0) |
|
goto err_buf; |
|
|
|
/* set initial frequency */ |
|
si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */ |
|
|
|
/* register video device */ |
|
retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, |
|
radio_nr); |
|
if (retval) { |
|
dev_err(&intf->dev, "Could not register video device\n"); |
|
goto err_all; |
|
} |
|
|
|
return 0; |
|
err_all: |
|
usb_kill_urb(radio->int_in_urb); |
|
err_buf: |
|
kfree(radio->buffer); |
|
err_ctrl: |
|
v4l2_ctrl_handler_free(&radio->hdl); |
|
err_dev: |
|
v4l2_device_unregister(&radio->v4l2_dev); |
|
err_urb: |
|
usb_free_urb(radio->int_in_urb); |
|
err_intbuffer: |
|
kfree(radio->int_in_buffer); |
|
err_usbbuf: |
|
kfree(radio->usb_buf); |
|
err_radio: |
|
kfree(radio); |
|
err_initial: |
|
return retval; |
|
} |
|
|
|
|
|
/* |
|
* si470x_usb_driver_suspend - suspend the device |
|
*/ |
|
static int si470x_usb_driver_suspend(struct usb_interface *intf, |
|
pm_message_t message) |
|
{ |
|
struct si470x_device *radio = usb_get_intfdata(intf); |
|
|
|
dev_info(&intf->dev, "suspending now...\n"); |
|
|
|
/* shutdown interrupt handler */ |
|
if (radio->int_in_running) { |
|
radio->int_in_running = 0; |
|
if (radio->int_in_urb) |
|
usb_kill_urb(radio->int_in_urb); |
|
} |
|
|
|
/* cancel read processes */ |
|
wake_up_interruptible(&radio->read_queue); |
|
|
|
/* stop radio */ |
|
si470x_stop(radio); |
|
return 0; |
|
} |
|
|
|
|
|
/* |
|
* si470x_usb_driver_resume - resume the device |
|
*/ |
|
static int si470x_usb_driver_resume(struct usb_interface *intf) |
|
{ |
|
struct si470x_device *radio = usb_get_intfdata(intf); |
|
int ret; |
|
|
|
dev_info(&intf->dev, "resuming now...\n"); |
|
|
|
/* start radio */ |
|
ret = si470x_start_usb(radio); |
|
if (ret == 0) |
|
v4l2_ctrl_handler_setup(&radio->hdl); |
|
|
|
return ret; |
|
} |
|
|
|
|
|
/* |
|
* si470x_usb_driver_disconnect - disconnect the device |
|
*/ |
|
static void si470x_usb_driver_disconnect(struct usb_interface *intf) |
|
{ |
|
struct si470x_device *radio = usb_get_intfdata(intf); |
|
|
|
mutex_lock(&radio->lock); |
|
v4l2_device_disconnect(&radio->v4l2_dev); |
|
video_unregister_device(&radio->videodev); |
|
usb_kill_urb(radio->int_in_urb); |
|
usb_set_intfdata(intf, NULL); |
|
mutex_unlock(&radio->lock); |
|
v4l2_device_put(&radio->v4l2_dev); |
|
} |
|
|
|
|
|
/* |
|
* si470x_usb_driver - usb driver interface |
|
* |
|
* A note on suspend/resume: this driver had only empty suspend/resume |
|
* functions, and when I tried to test suspend/resume it always disconnected |
|
* instead of resuming (using my ADS InstantFM stick). So I've decided to |
|
* remove these callbacks until someone else with better hardware can |
|
* implement and test this. |
|
*/ |
|
static struct usb_driver si470x_usb_driver = { |
|
.name = DRIVER_NAME, |
|
.probe = si470x_usb_driver_probe, |
|
.disconnect = si470x_usb_driver_disconnect, |
|
.suspend = si470x_usb_driver_suspend, |
|
.resume = si470x_usb_driver_resume, |
|
.reset_resume = si470x_usb_driver_resume, |
|
.id_table = si470x_usb_driver_id_table, |
|
}; |
|
|
|
module_usb_driver(si470x_usb_driver); |
|
|
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR(DRIVER_AUTHOR); |
|
MODULE_DESCRIPTION(DRIVER_DESC); |
|
MODULE_VERSION(DRIVER_VERSION);
|
|
|