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![Hans Verkuil](/assets/img/avatar_default.png)
In the probe() function radio->int_in_urb was not killed if an error occurred in the probe sequence. It was also missing in the disconnect. This caused this syzbot issue: https://syzkaller.appspot.com/bug?extid=2d4fc2a0c45ad8da7e99 Reported-and-tested-by: syzbot+2d4fc2a0c45ad8da7e99@syzkaller.appspotmail.com Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
858 lines
23 KiB
C
858 lines
23 KiB
C
// 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 <tobias.lorenz@gmx.net>
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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 <tobias.lorenz@gmx.net>"
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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,
|
|
struct v4l2_capability *capability)
|
|
{
|
|
struct si470x_device *radio = video_drvdata(file);
|
|
|
|
strscpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
|
|
strscpy(capability->card, DRIVER_CARD, sizeof(capability->card));
|
|
usb_make_path(radio->usbdev, capability->bus_info,
|
|
sizeof(capability->bus_info));
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int si470x_start_usb(struct si470x_device *radio)
|
|
{
|
|
int retval;
|
|
|
|
/* initialize interrupt urb */
|
|
usb_fill_int_urb(radio->int_in_urb, radio->usbdev,
|
|
usb_rcvintpipe(radio->usbdev,
|
|
radio->int_in_endpoint->bEndpointAddress),
|
|
radio->int_in_buffer,
|
|
le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize),
|
|
si470x_int_in_callback,
|
|
radio,
|
|
radio->int_in_endpoint->bInterval);
|
|
|
|
radio->int_in_running = 1;
|
|
mb();
|
|
|
|
retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
dev_info(&radio->intf->dev,
|
|
"submitting int urb failed (%d)\n", retval);
|
|
radio->int_in_running = 0;
|
|
}
|
|
radio->status_rssi_auto_update = radio->int_in_running;
|
|
|
|
/* start radio */
|
|
retval = si470x_start(radio);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
v4l2_ctrl_handler_setup(&radio->hdl);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/**************************************************************************
|
|
* USB Interface
|
|
**************************************************************************/
|
|
|
|
/*
|
|
* si470x_usb_driver_probe - probe for the device
|
|
*/
|
|
static int si470x_usb_driver_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct si470x_device *radio;
|
|
struct usb_host_interface *iface_desc;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
int i, int_end_size, retval;
|
|
unsigned char version_warning = 0;
|
|
|
|
/* private data allocation and initialization */
|
|
radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
|
|
if (!radio) {
|
|
retval = -ENOMEM;
|
|
goto err_initial;
|
|
}
|
|
radio->usb_buf = kmalloc(MAX_REPORT_SIZE, GFP_KERNEL);
|
|
if (radio->usb_buf == NULL) {
|
|
retval = -ENOMEM;
|
|
goto err_radio;
|
|
}
|
|
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 linux-media@vger.kernel.org\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);
|