| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * drivers/media/radio/si470x/radio-si470x-usb.c |
| * |
| * USB driver for radios with Silicon Labs Si470x FM Radio Receivers |
| * |
| * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net> |
| */ |
| |
| |
| /* |
| * ToDo: |
| * - add firmware download/update support |
| */ |
| |
| |
| /* driver definitions */ |
| #define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>" |
| #define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver" |
| #define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers" |
| #define DRIVER_VERSION "1.0.10" |
| |
| /* kernel includes */ |
| #include <linux/usb.h> |
| #include <linux/hid.h> |
| #include <linux/slab.h> |
| |
| #include "radio-si470x.h" |
| |
| |
| /* USB Device ID List */ |
| static const struct usb_device_id si470x_usb_driver_id_table[] = { |
| /* Silicon Labs USB FM Radio Reference Design */ |
| { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) }, |
| /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */ |
| { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) }, |
| /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */ |
| { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) }, |
| /* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */ |
| { USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) }, |
| /* Axentia ALERT FM USB Receiver */ |
| { USB_DEVICE_AND_INTERFACE_INFO(0x12cf, 0x7111, USB_CLASS_HID, 0, 0) }, |
| /* Terminating entry */ |
| { } |
| }; |
| MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table); |
| |
| |
| |
| /************************************************************************** |
| * Module Parameters |
| **************************************************************************/ |
| |
| /* Radio Nr */ |
| static int radio_nr = -1; |
| module_param(radio_nr, int, 0444); |
| MODULE_PARM_DESC(radio_nr, "Radio Nr"); |
| |
| /* USB timeout */ |
| static unsigned int usb_timeout = 500; |
| module_param(usb_timeout, uint, 0644); |
| MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*"); |
| |
| /* RDS buffer blocks */ |
| static unsigned int rds_buf = 100; |
| module_param(rds_buf, uint, 0444); |
| MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*"); |
| |
| /* RDS maximum block errors */ |
| static unsigned short max_rds_errors = 1; |
| /* 0 means 0 errors requiring correction */ |
| /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */ |
| /* 2 means 3-5 errors requiring correction */ |
| /* 3 means 6+ errors or errors in checkword, correction not possible */ |
| module_param(max_rds_errors, ushort, 0644); |
| MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*"); |
| |
| |
| |
| /************************************************************************** |
| * USB HID Reports |
| **************************************************************************/ |
| |
| /* Reports 1-16 give direct read/write access to the 16 Si470x registers */ |
| /* with the (REPORT_ID - 1) corresponding to the register address across USB */ |
| /* endpoint 0 using GET_REPORT and SET_REPORT */ |
| #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1) |
| #define REGISTER_REPORT(reg) ((reg) + 1) |
| |
| /* Report 17 gives direct read/write access to the entire Si470x register */ |
| /* map across endpoint 0 using GET_REPORT and SET_REPORT */ |
| #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) |
| #define ENTIRE_REPORT 17 |
| |
| /* Report 18 is used to send the lowest 6 Si470x registers up the HID */ |
| /* interrupt endpoint 1 to Windows every 20 milliseconds for status */ |
| #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) |
| #define RDS_REPORT 18 |
| |
| /* Report 19: LED state */ |
| #define LED_REPORT_SIZE 3 |
| #define LED_REPORT 19 |
| |
| /* Report 19: stream */ |
| #define STREAM_REPORT_SIZE 3 |
| #define STREAM_REPORT 19 |
| |
| /* Report 20: scratch */ |
| #define SCRATCH_PAGE_SIZE 63 |
| #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1) |
| #define SCRATCH_REPORT 20 |
| |
| /* Reports 19-22: flash upgrade of the C8051F321 */ |
| #define WRITE_REPORT_SIZE 4 |
| #define WRITE_REPORT 19 |
| #define FLASH_REPORT_SIZE 64 |
| #define FLASH_REPORT 20 |
| #define CRC_REPORT_SIZE 3 |
| #define CRC_REPORT 21 |
| #define RESPONSE_REPORT_SIZE 2 |
| #define RESPONSE_REPORT 22 |
| |
| /* Report 23: currently unused, but can accept 60 byte reports on the HID */ |
| /* interrupt out endpoint 2 every 1 millisecond */ |
| #define UNUSED_REPORT 23 |
| |
| #define MAX_REPORT_SIZE 64 |
| |
| |
| |
| /************************************************************************** |
| * Software/Hardware Versions from Scratch Page |
| **************************************************************************/ |
| #define RADIO_HW_VERSION 1 |
| |
| |
| |
| /************************************************************************** |
| * LED State Definitions |
| **************************************************************************/ |
| #define LED_COMMAND 0x35 |
| |
| #define NO_CHANGE_LED 0x00 |
| #define ALL_COLOR_LED 0x01 /* streaming state */ |
| #define BLINK_GREEN_LED 0x02 /* connect state */ |
| #define BLINK_RED_LED 0x04 |
| #define BLINK_ORANGE_LED 0x10 /* disconnect state */ |
| #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */ |
| #define SOLID_RED_LED 0x40 /* bootload state */ |
| #define SOLID_ORANGE_LED 0x80 |
| |
| |
| |
| /************************************************************************** |
| * Stream State Definitions |
| **************************************************************************/ |
| #define STREAM_COMMAND 0x36 |
| #define STREAM_VIDPID 0x00 |
| #define STREAM_AUDIO 0xff |
| |
| |
| |
| /************************************************************************** |
| * Bootloader / Flash Commands |
| **************************************************************************/ |
| |
| /* unique id sent to bootloader and required to put into a bootload state */ |
| #define UNIQUE_BL_ID 0x34 |
| |
| /* mask for the flash data */ |
| #define FLASH_DATA_MASK 0x55 |
| |
| /* bootloader commands */ |
| #define GET_SW_VERSION_COMMAND 0x00 |
| #define SET_PAGE_COMMAND 0x01 |
| #define ERASE_PAGE_COMMAND 0x02 |
| #define WRITE_PAGE_COMMAND 0x03 |
| #define CRC_ON_PAGE_COMMAND 0x04 |
| #define READ_FLASH_BYTE_COMMAND 0x05 |
| #define RESET_DEVICE_COMMAND 0x06 |
| #define GET_HW_VERSION_COMMAND 0x07 |
| #define BLANK 0xff |
| |
| /* bootloader command responses */ |
| #define COMMAND_OK 0x01 |
| #define COMMAND_FAILED 0x02 |
| #define COMMAND_PENDING 0x03 |
| |
| |
| |
| /************************************************************************** |
| * General Driver Functions - REGISTER_REPORTs |
| **************************************************************************/ |
| |
| /* |
| * si470x_get_report - receive a HID report |
| */ |
| static int si470x_get_report(struct si470x_device *radio, void *buf, int size) |
| { |
| unsigned char *report = buf; |
| int retval; |
| |
| retval = usb_control_msg(radio->usbdev, |
| usb_rcvctrlpipe(radio->usbdev, 0), |
| HID_REQ_GET_REPORT, |
| USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, |
| report[0], 2, |
| buf, size, usb_timeout); |
| |
| if (retval < 0) |
| dev_warn(&radio->intf->dev, |
| "si470x_get_report: usb_control_msg returned %d\n", |
| retval); |
| return retval; |
| } |
| |
| |
| /* |
| * si470x_set_report - send a HID report |
| */ |
| static int si470x_set_report(struct si470x_device *radio, void *buf, int size) |
| { |
| unsigned char *report = buf; |
| int retval; |
| |
| retval = usb_control_msg(radio->usbdev, |
| usb_sndctrlpipe(radio->usbdev, 0), |
| HID_REQ_SET_REPORT, |
| USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT, |
| report[0], 2, |
| buf, size, usb_timeout); |
| |
| if (retval < 0) |
| dev_warn(&radio->intf->dev, |
| "si470x_set_report: usb_control_msg returned %d\n", |
| retval); |
| return retval; |
| } |
| |
| |
| /* |
| * si470x_get_register - read register |
| */ |
| static int si470x_get_register(struct si470x_device *radio, int regnr) |
| { |
| int retval; |
| |
| radio->usb_buf[0] = REGISTER_REPORT(regnr); |
| |
| retval = si470x_get_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE); |
| |
| if (retval >= 0) |
| radio->registers[regnr] = get_unaligned_be16(&radio->usb_buf[1]); |
| |
| return (retval < 0) ? -EINVAL : 0; |
| } |
| |
| |
| /* |
| * si470x_set_register - write register |
| */ |
| static int si470x_set_register(struct si470x_device *radio, int regnr) |
| { |
| int retval; |
| |
| radio->usb_buf[0] = REGISTER_REPORT(regnr); |
| put_unaligned_be16(radio->registers[regnr], &radio->usb_buf[1]); |
| |
| retval = si470x_set_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE); |
| |
| return (retval < 0) ? -EINVAL : 0; |
| } |
| |
| |
| |
| /************************************************************************** |
| * General Driver Functions - ENTIRE_REPORT |
| **************************************************************************/ |
| |
| /* |
| * si470x_get_all_registers - read entire registers |
| */ |
| static int si470x_get_all_registers(struct si470x_device *radio) |
| { |
| int retval; |
| unsigned char regnr; |
| |
| radio->usb_buf[0] = ENTIRE_REPORT; |
| |
| retval = si470x_get_report(radio, radio->usb_buf, ENTIRE_REPORT_SIZE); |
| |
| if (retval >= 0) |
| for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++) |
| radio->registers[regnr] = get_unaligned_be16( |
| &radio->usb_buf[regnr * RADIO_REGISTER_SIZE + 1]); |
| |
| return (retval < 0) ? -EINVAL : 0; |
| } |
| |
| |
| |
| /************************************************************************** |
| * General Driver Functions - LED_REPORT |
| **************************************************************************/ |
| |
| /* |
| * si470x_set_led_state - sets the led state |
| */ |
| static int si470x_set_led_state(struct si470x_device *radio, |
| unsigned char led_state) |
| { |
| int retval; |
| |
| radio->usb_buf[0] = LED_REPORT; |
| radio->usb_buf[1] = LED_COMMAND; |
| radio->usb_buf[2] = led_state; |
| |
| retval = si470x_set_report(radio, radio->usb_buf, LED_REPORT_SIZE); |
| |
| return (retval < 0) ? -EINVAL : 0; |
| } |
| |
| |
| |
| /************************************************************************** |
| * General Driver Functions - SCRATCH_REPORT |
| **************************************************************************/ |
| |
| /* |
| * si470x_get_scratch_versions - gets the scratch page and version infos |
| */ |
| static int si470x_get_scratch_page_versions(struct si470x_device *radio) |
| { |
| int retval; |
| |
| radio->usb_buf[0] = SCRATCH_REPORT; |
| |
| retval = si470x_get_report(radio, radio->usb_buf, SCRATCH_REPORT_SIZE); |
| |
| if (retval < 0) |
| dev_warn(&radio->intf->dev, "si470x_get_scratch: si470x_get_report returned %d\n", |
| retval); |
| else { |
| radio->software_version = radio->usb_buf[1]; |
| radio->hardware_version = radio->usb_buf[2]; |
| } |
| |
| return (retval < 0) ? -EINVAL : 0; |
| } |
| |
| |
| |
| /************************************************************************** |
| * RDS Driver Functions |
| **************************************************************************/ |
| |
| /* |
| * si470x_int_in_callback - rds callback and processing function |
| * |
| * TODO: do we need to use mutex locks in some sections? |
| */ |
| static void si470x_int_in_callback(struct urb *urb) |
| { |
| struct si470x_device *radio = urb->context; |
| int retval; |
| unsigned char regnr; |
| unsigned char blocknum; |
| unsigned short bler; /* rds block errors */ |
| unsigned short rds; |
| unsigned char tmpbuf[3]; |
| |
| if (urb->status) { |
| if (urb->status == -ENOENT || |
| urb->status == -ECONNRESET || |
| urb->status == -ESHUTDOWN) { |
| return; |
| } else { |
| dev_warn(&radio->intf->dev, |
| "non-zero urb status (%d)\n", urb->status); |
| goto resubmit; /* Maybe we can recover. */ |
| } |
| } |
| |
| /* Sometimes the device returns len 0 packets */ |
| if (urb->actual_length != RDS_REPORT_SIZE) |
| goto resubmit; |
| |
| radio->registers[STATUSRSSI] = |
| get_unaligned_be16(&radio->int_in_buffer[1]); |
| |
| if (radio->registers[STATUSRSSI] & STATUSRSSI_STC) |
| complete(&radio->completion); |
| |
| if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)) { |
| /* Update RDS registers with URB data */ |
| for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++) |
| radio->registers[STATUSRSSI + regnr] = |
| get_unaligned_be16(&radio->int_in_buffer[ |
| regnr * RADIO_REGISTER_SIZE + 1]); |
| /* get rds blocks */ |
| if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) { |
| /* No RDS group ready, better luck next time */ |
| goto resubmit; |
| } |
| if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) { |
| /* RDS decoder not synchronized */ |
| goto resubmit; |
| } |
| for (blocknum = 0; blocknum < 4; blocknum++) { |
| switch (blocknum) { |
| default: |
| bler = (radio->registers[STATUSRSSI] & |
| STATUSRSSI_BLERA) >> 9; |
| rds = radio->registers[RDSA]; |
| break; |
| case 1: |
| bler = (radio->registers[READCHAN] & |
| READCHAN_BLERB) >> 14; |
| rds = radio->registers[RDSB]; |
| break; |
| case 2: |
| bler = (radio->registers[READCHAN] & |
| READCHAN_BLERC) >> 12; |
| rds = radio->registers[RDSC]; |
| break; |
| case 3: |
| bler = (radio->registers[READCHAN] & |
| READCHAN_BLERD) >> 10; |
| rds = radio->registers[RDSD]; |
| break; |
| } |
| |
| /* Fill the V4L2 RDS buffer */ |
| put_unaligned_le16(rds, &tmpbuf); |
| tmpbuf[2] = blocknum; /* offset name */ |
| tmpbuf[2] |= blocknum << 3; /* received offset */ |
| if (bler > max_rds_errors) |
| tmpbuf[2] |= 0x80; /* uncorrectable errors */ |
| else if (bler > 0) |
| tmpbuf[2] |= 0x40; /* corrected error(s) */ |
| |
| /* copy RDS block to internal buffer */ |
| memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3); |
| radio->wr_index += 3; |
| |
| /* wrap write pointer */ |
| if (radio->wr_index >= radio->buf_size) |
| radio->wr_index = 0; |
| |
| /* check for overflow */ |
| if (radio->wr_index == radio->rd_index) { |
| /* increment and wrap read pointer */ |
| radio->rd_index += 3; |
| if (radio->rd_index >= radio->buf_size) |
| radio->rd_index = 0; |
| } |
| } |
| if (radio->wr_index != radio->rd_index) |
| wake_up_interruptible(&radio->read_queue); |
| } |
| |
| resubmit: |
| /* Resubmit if we're still running. */ |
| if (radio->int_in_running && radio->usbdev) { |
| retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC); |
| if (retval) { |
| dev_warn(&radio->intf->dev, |
| "resubmitting urb failed (%d)", retval); |
| radio->int_in_running = 0; |
| } |
| } |
| radio->status_rssi_auto_update = radio->int_in_running; |
| } |
| |
| |
| static int si470x_fops_open(struct file *file) |
| { |
| return v4l2_fh_open(file); |
| } |
| |
| static int si470x_fops_release(struct file *file) |
| { |
| return v4l2_fh_release(file); |
| } |
| |
| static void si470x_usb_release(struct v4l2_device *v4l2_dev) |
| { |
| struct si470x_device *radio = |
| container_of(v4l2_dev, struct si470x_device, v4l2_dev); |
| |
| usb_free_urb(radio->int_in_urb); |
| v4l2_ctrl_handler_free(&radio->hdl); |
| v4l2_device_unregister(&radio->v4l2_dev); |
| kfree(radio->int_in_buffer); |
| kfree(radio->buffer); |
| kfree(radio->usb_buf); |
| kfree(radio); |
| } |
| |
| |
| /************************************************************************** |
| * Video4Linux Interface |
| **************************************************************************/ |
| |
| /* |
| * si470x_vidioc_querycap - query device capabilities |
| */ |
| 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); |