--- /dev/null
+/*
+ * drivers/media/radio/radio-si470x.c
+ *
+ * Driver for USB radios for the Silicon Labs Si470x FM Radio Receivers:
+ * - Silicon Labs USB FM Radio Reference Design
+ * - ADS/Tech FM Radio Receiver (formerly Instant FM Music) (RDX-155-EF)
+ *
+ * Copyright (c) 2007 Tobias Lorenz <tobias.lorenz@gmx.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+/*
+ * History:
+ * 2008-01-12 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.0
+ * - First working version
+ * 2008-01-13 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.1
+ * - Improved error handling, every function now returns errno
+ * - Improved multi user access (start/mute/stop)
+ * - Channel doesn't get lost anymore after start/mute/stop
+ * - RDS support added (polling mode via interrupt EP 1)
+ * - marked default module parameters with *value*
+ * - switched from bit structs to bit masks
+ * - header file cleaned and integrated
+ * 2008-01-14 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.2
+ * - hex values are now lower case
+ * - commented USB ID for ADS/Tech moved on todo list
+ * - blacklisted si470x in hid-quirks.c
+ * - rds buffer handling functions integrated into *_work, *_read
+ * - rds_command in si470x_poll exchanged against simple retval
+ * - check for firmware version 15
+ * - code order and prototypes still remain the same
+ * - spacing and bottom of band codes remain the same
+ *
+ * ToDo:
+ * - check USB Vendor/Product ID for ADS/Tech FM Radio Receiver
+ * (formerly Instant FM Music) (RDX-155-EF) is 06e1:a155
+ * - add seeking support
+ * - add firmware download/update support
+ * - add possibility to switch off RDS
+ * - RDS support: interrupt mode, instead of polling
+ * - add LED status output
+ */
+
+/* driver definitions */
+#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
+#define DRIVER_NAME "radio-si470x"
+#define DRIVER_VERSION KERNEL_VERSION(1, 0, 2)
+#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
+#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
+
+
+/* kernel includes */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <linux/usb.h>
+#include <linux/hid.h>
+#include <linux/version.h>
+#include <media/rds.h>
+
+
+/* Radio Nr */
+static int radio_nr = -1;
+module_param(radio_nr, int, 0);
+MODULE_PARM_DESC(radio_nr, "Radio Nr");
+
+/* Spacing (kHz) */
+/* 0: 200 kHz (USA, Australia) */
+/* 1: 100 kHz (Europe, Japan) */
+/* 2: 50 kHz */
+static int space = 2;
+module_param(space, int, 0);
+MODULE_PARM_DESC(radio_nr, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
+
+/* Bottom of Band (MHz) */
+/* 0: 87.5 - 108 MHz (USA, Europe)*/
+/* 1: 76 - 108 MHz (Japan wide band) */
+/* 2: 76 - 90 MHz (Japan) */
+static int band = 1;
+module_param(band, int, 0);
+MODULE_PARM_DESC(radio_nr, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
+
+/* De-emphasis */
+/* 0: 75 us (USA) */
+/* 1: 50 us (Europe, Australia, Japan) */
+static int de = 1;
+module_param(de, int, 0);
+MODULE_PARM_DESC(radio_nr, "De-emphasis: 0=75us *1=50us*");
+
+/* USB timeout */
+static int usb_timeout = 500;
+module_param(usb_timeout, int, 0);
+MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
+
+/* Seek retries */
+static int seek_retries = 100;
+module_param(seek_retries, int, 0);
+MODULE_PARM_DESC(seek_retries, "Seek retries: *100*");
+
+/* RDS buffer blocks */
+static int rds_buf = 100;
+module_param(rds_buf, int, 0);
+MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
+
+/* RDS maximum block errors */
+static int 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, int, 0);
+MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
+
+/* RDS poll frequency */
+static int rds_poll_time = 40;
+/* 40 is used by the original USBRadio.exe */
+/* 75 should be okay */
+/* 80 is the usual RDS receive interval */
+module_param(rds_poll_time, int, 0);
+MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
+
+
+
+/**************************************************************************
+ * Register Definitions
+ **************************************************************************/
+#define FMRADIO_REGISTER_SIZE 2 /* 16 register bit width */
+#define FMRADIO_REGISTER_NUM 16 /* DEVICEID ... RDSD */
+#define RDS_REGISTER_NUM 6 /* STATUSRSSI ... RDSD */
+
+#define DEVICEID 0 /* Device ID */
+#define DEVICEID_PN 0xf000 /* bits 15..12: Part Number */
+#define DEVICEID_MFGID 0x0fff /* bits 11..00: Manufacturer ID */
+
+#define CHIPID 1 /* Chip ID */
+#define CHIPID_REV 0xfc00 /* bits 15..10: Chip Version */
+#define CHIPID_DEV 0x0200 /* bits 09..09: Device */
+#define CHIPID_FIRMWARE 0x01ff /* bits 08..00: Firmware Version */
+
+#define POWERCFG 2 /* Power Configuration */
+#define POWERCFG_DSMUTE 0x8000 /* bits 15..15: Softmute Disable */
+#define POWERCFG_DMUTE 0x4000 /* bits 14..14: Mute Disable */
+#define POWERCFG_MONO 0x2000 /* bits 13..13: Mono Select */
+#define POWERCFG_RDSM 0x0800 /* bits 11..11: RDS Mode (Si4701 only) */
+#define POWERCFG_SKMODE 0x0400 /* bits 10..10: Seek Mode */
+#define POWERCFG_SEEKUP 0x0200 /* bits 09..09: Seek Direction */
+#define POWERCFG_SEEK 0x0100 /* bits 08..08: Seek */
+#define POWERCFG_DISABLE 0x0040 /* bits 06..06: Powerup Disable */
+#define POWERCFG_ENABLE 0x0001 /* bits 00..00: Powerup Enable */
+
+#define CHANNEL 3 /* Channel */
+#define CHANNEL_TUNE 0x8000 /* bits 15..15: Tune */
+#define CHANNEL_CHAN 0x03ff /* bits 09..00: Channel Select */
+
+#define SYSCONFIG1 4 /* System Configuration 1 */
+#define SYSCONFIG1_RDSIEN 0x8000 /* bits 15..15: RDS Interrupt Enable (Si4701 only) */
+#define SYSCONFIG1_STCIEN 0x4000 /* bits 14..14: Seek/Tune Complete Interrupt Enable */
+#define SYSCONFIG1_RDS 0x1000 /* bits 12..12: RDS Enable (Si4701 only) */
+#define SYSCONFIG1_DE 0x0800 /* bits 11..11: De-emphasis (0=75us 1=50us) */
+#define SYSCONFIG1_AGCD 0x0400 /* bits 10..10: AGC Disable */
+#define SYSCONFIG1_BLNDADJ 0x00c0 /* bits 07..06: Stereo/Mono Blend Level Adjustment */
+#define SYSCONFIG1_GPIO3 0x0030 /* bits 05..04: General Purpose I/O 3 */
+#define SYSCONFIG1_GPIO2 0x000c /* bits 03..02: General Purpose I/O 2 */
+#define SYSCONFIG1_GPIO1 0x0003 /* bits 01..00: General Purpose I/O 1 */
+
+#define SYSCONFIG2 5 /* System Configuration 2 */
+#define SYSCONFIG2_SEEKTH 0xff00 /* bits 15..08: RSSI Seek Threshold */
+#define SYSCONFIG2_BAND 0x0080 /* bits 07..06: Band Select */
+#define SYSCONFIG2_SPACE 0x0030 /* bits 05..04: Channel Spacing */
+#define SYSCONFIG2_VOLUME 0x000f /* bits 03..00: Volume */
+
+#define SYSCONFIG3 6 /* System Configuration 3 */
+#define SYSCONFIG3_SMUTER 0xc000 /* bits 15..14: Softmute Attack/Recover Rate */
+#define SYSCONFIG3_SMUTEA 0x3000 /* bits 13..12: Softmute Attenuation */
+#define SYSCONFIG3_SKSNR 0x00f0 /* bits 07..04: Seek SNR Threshold */
+#define SYSCONFIG3_SKCNT 0x000f /* bits 03..00: Seek FM Impulse Detection Threshold */
+
+#define TEST1 7 /* Test 1 */
+#define TEST1_AHIZEN 0x4000 /* bits 14..14: Audio High-Z Enable */
+
+#define TEST2 8 /* Test 2 */
+/* TEST2 only contains reserved bits */
+
+#define BOOTCONFIG 9 /* Boot Configuration */
+/* BOOTCONFIG only contains reserved bits */
+
+#define STATUSRSSI 10 /* Status RSSI */
+#define STATUSRSSI_RDSR 0x8000 /* bits 15..15: RDS Ready (Si4701 only) */
+#define STATUSRSSI_STC 0x4000 /* bits 14..14: Seek/Tune Complete */
+#define STATUSRSSI_SF 0x2000 /* bits 13..13: Seek Fail/Band Limit */
+#define STATUSRSSI_AFCRL 0x1000 /* bits 12..12: AFC Rail */
+#define STATUSRSSI_RDSS 0x0800 /* bits 11..11: RDS Synchronized (Si4701 only) */
+#define STATUSRSSI_BLERA 0x0600 /* bits 10..09: RDS Block A Errors (Si4701 only) */
+#define STATUSRSSI_ST 0x0100 /* bits 08..08: Stereo Indicator */
+#define STATUSRSSI_RSSI 0x00ff /* bits 07..00: RSSI (Received Signal Strength Indicator) */
+
+#define READCHAN 11 /* Read Channel */
+#define READCHAN_BLERB 0xc000 /* bits 15..14: RDS Block D Errors (Si4701 only) */
+#define READCHAN_BLERC 0x3000 /* bits 13..12: RDS Block C Errors (Si4701 only) */
+#define READCHAN_BLERD 0x0c00 /* bits 11..10: RDS Block B Errors (Si4701 only) */
+#define READCHAN_READCHAN 0x03ff /* bits 09..00: Read Channel */
+
+#define RDSA 12 /* RDSA */
+#define RDSA_RDSA 0xffff /* bits 15..00: RDS Block A Data (Si4701 only) */
+
+#define RDSB 13 /* RDSB */
+#define RDSB_RDSB 0xffff /* bits 15..00: RDS Block B Data (Si4701 only) */
+
+#define RDSC 14 /* RDSC */
+#define RDSC_RDSC 0xffff /* bits 15..00: RDS Block C Data (Si4701 only) */
+
+#define RDSD 15 /* RDSD */
+#define RDSD_RDSD 0xffff /* bits 15..00: RDS Block D Data (Si4701 only) */
+
+
+
+/**************************************************************************
+ * 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 (FMRADIO_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 (FMRADIO_REGISTER_NUM * FMRADIO_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 * FMRADIO_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 19
+#define FLASH_REPORT 20
+#define CRC_REPORT 21
+#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
+
+
+
+/**************************************************************************
+ * software/hardware versions
+ **************************************************************************/
+#define FMRADIO_SW_VERSION_NOT_BOOTLOADABLE 6
+#define FMRADIO_SW_VERSION 7
+#define FMRADIO_SW_VERSION_CURRENT 15
+#define FMRADIO_HW_VERSION 1
+
+#define SCRATCH_PAGE_SW_VERSION 1
+#define SCRATCH_PAGE_HW_VERSION 2
+
+
+
+/**************************************************************************
+ * 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
+
+/* Buffer sizes */
+#define COMMAND_BUFFER_SIZE 4
+#define RESPONSE_BUFFER_SIZE 2
+#define FLASH_BUFFER_SIZE 64
+#define CRC_BUFFER_SIZE 3
+
+
+
+/**************************************************************************
+ * Driver private definitions
+ **************************************************************************/
+
+/* private data */
+struct si470x_device {
+ /* reference to USB and video device */
+ struct usb_device *usbdev;
+ struct video_device *videodev;
+
+ /* are these really necessary ? */
+ int users;
+
+ /* report buffer (maximum 64 bytes) */
+ unsigned char buf[64];
+
+ /* Silabs internal registers (0..15) */
+ unsigned short registers[FMRADIO_REGISTER_NUM];
+
+ /* RDS receive buffer */
+ struct work_struct work;
+ struct timer_list timer;
+ spinlock_t lock;
+ unsigned char *buffer;
+ unsigned int buf_size;
+ unsigned int rd_index;
+ unsigned int wr_index;
+ unsigned int block_count;
+ unsigned char last_blocknum;
+ wait_queue_head_t read_queue;
+ int data_available_for_read;
+};
+
+/* register acccess functions */
+static int si470x_get_report(struct si470x_device *radio, int size);
+static int si470x_set_report(struct si470x_device *radio, int size);
+static int si470x_get_register(struct si470x_device *radio, int regnr);
+static int si470x_set_register(struct si470x_device *radio, int regnr);
+static int si470x_get_all_registers(struct si470x_device *radio);
+static int si470x_get_rds_registers(struct si470x_device *radio);
+
+/* high-level functions */
+static int si470x_start(struct si470x_device *radio);
+static int si470x_stop(struct si470x_device *radio);
+static int si470x_set_chan(struct si470x_device *radio, int chan);
+static int si470x_get_freq(struct si470x_device *radio);
+static int si470x_set_freq(struct si470x_device *radio, int freq);
+
+/* RDS functions */
+static void si470x_rds(struct si470x_device *radio);
+static void si470x_timer(unsigned long data);
+static void si470x_work(struct work_struct *work);
+
+
+
+/**************************************************************************
+ * USB interface definitions
+ **************************************************************************/
+
+/* USB device ID list (Vendor, Product, Class, SubClass, Protocol) */
+static 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) },
+ /* Terminating entry */
+ { }
+};
+MODULE_DEVICE_TABLE (usb, si470x_usb_driver_id_table);
+
+/* USB driver functions */
+static int si470x_usb_driver_probe(struct usb_interface *intf,
+ const struct usb_device_id *id);
+static void si470x_usb_driver_disconnect(struct usb_interface *intf);
+
+/* USB driver interface */
+static struct usb_driver si470x_usb_driver = {
+ .name = DRIVER_NAME,
+ .probe = si470x_usb_driver_probe,
+ .disconnect = si470x_usb_driver_disconnect,
+ .id_table = si470x_usb_driver_id_table,
+};
+
+
+
+/**************************************************************************
+ * Video4Linux interface definitions
+ **************************************************************************/
+
+/* The frequency is set in units of 62.5 Hz when using V4L2_TUNER_CAP_LOW, */
+/* 62.5 kHz otherwise. */
+/* The tuner is able to have a channel spacing of 50, 100 or 200 kHz. */
+/* tuner->capability is therefore set to V4L2_TUNER_CAP_LOW */
+/* The FREQ_MUL is then: 1 MHz / 62.5 Hz = 16000 */
+#define FREQ_MUL (1000000 / 62.5)
+
+/* File operations functions */
+static ssize_t si470x_fops_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos);
+static unsigned int si470x_fops_poll(struct file *file,
+ struct poll_table_struct *pts);
+static int si470x_fops_open(struct inode *inode, struct file *file);
+static int si470x_fops_release(struct inode *inode, struct file *file);
+
+/* File operations interface */
+static const struct file_operations si470x_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = si470x_fops_read,
+ .poll = si470x_fops_poll,
+ .ioctl = video_ioctl2,
+ .compat_ioctl = v4l_compat_ioctl32,
+ .open = si470x_fops_open,
+ .release = si470x_fops_release,
+};
+
+/* Video device functions */
+static int si470x_vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *capability);
+static int si470x_vidioc_g_input(struct file *file, void *priv,
+ unsigned int *i);
+static int si470x_vidioc_s_input(struct file *file, void *priv,
+ unsigned int i);
+static int si470x_vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc);
+static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl);
+static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl);
+static int si470x_vidioc_g_audio(struct file *file, void *priv,
+ struct v4l2_audio *audio);
+static int si470x_vidioc_s_audio(struct file *file, void *priv,
+ struct v4l2_audio *audio);
+static int si470x_vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *tuner);
+static int si470x_vidioc_s_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *tuner);
+static int si470x_vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *freq);
+static int si470x_vidioc_s_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *freq);
+
+/* Video device interface */
+static struct video_device si470x_viddev_template = {
+ .fops = &si470x_fops,
+ .name = DRIVER_NAME,
+ .type = VID_TYPE_TUNER,
+ .release = video_device_release,
+ .vidioc_querycap = si470x_vidioc_querycap,
+ .vidioc_g_input = si470x_vidioc_g_input,
+ .vidioc_s_input = si470x_vidioc_s_input,
+ .vidioc_queryctrl = si470x_vidioc_queryctrl,
+ .vidioc_g_ctrl = si470x_vidioc_g_ctrl,
+ .vidioc_s_ctrl = si470x_vidioc_s_ctrl,
+ .vidioc_g_audio = si470x_vidioc_g_audio,
+ .vidioc_s_audio = si470x_vidioc_s_audio,
+ .vidioc_g_tuner = si470x_vidioc_g_tuner,
+ .vidioc_s_tuner = si470x_vidioc_s_tuner,
+ .vidioc_g_frequency = si470x_vidioc_g_frequency,
+ .vidioc_s_frequency = si470x_vidioc_s_frequency,
+ .owner = THIS_MODULE,
+};
+
+/* Query control */
+static struct v4l2_queryctrl radio_queryctrl[] = {
+/* HINT: the disabled controls are only here to satify kradio and such apps */
+ {
+ .id = V4L2_CID_AUDIO_VOLUME,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Volume",
+ .minimum = 0,
+ .maximum = 15,
+ .step = 1,
+ .default_value = 15,
+ },
+ {
+ .id = V4L2_CID_AUDIO_BALANCE,
+ .flags = V4L2_CTRL_FLAG_DISABLED,
+ },
+ {
+ .id = V4L2_CID_AUDIO_BASS,
+ .flags = V4L2_CTRL_FLAG_DISABLED,
+ },
+ {
+ .id = V4L2_CID_AUDIO_TREBLE,
+ .flags = V4L2_CTRL_FLAG_DISABLED,
+ },
+ {
+ .id = V4L2_CID_AUDIO_MUTE,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Mute",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 1,
+ },
+ {
+ .id = V4L2_CID_AUDIO_LOUDNESS,
+ .flags = V4L2_CTRL_FLAG_DISABLED,
+ },
+};
+
+
+
+/**************************************************************************
+ * Driver private functions
+ **************************************************************************/
+
+/*
+ * si470x_get_report - receive a HID report
+ */
+static int si470x_get_report(struct si470x_device *radio, int size)
+{
+ return usb_control_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 0),
+ HID_REQ_GET_REPORT,
+ USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
+ radio->buf[0], 2,
+ radio->buf, size, usb_timeout);
+}
+
+
+/*
+ * si470x_set_report - send a HID report
+ */
+static int si470x_set_report(struct si470x_device *radio, int size)
+{
+ return usb_control_msg(radio->usbdev,
+ usb_sndctrlpipe(radio->usbdev, 0),
+ HID_REQ_SET_REPORT,
+ USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
+ radio->buf[0], 2,
+ radio->buf, size, usb_timeout);
+}
+
+
+/*
+ * si470x_get_register - read register
+ */
+static int si470x_get_register(struct si470x_device *radio, int regnr)
+{
+ int retval;
+
+ radio->buf[0] = REGISTER_REPORT(regnr);
+
+ retval = si470x_get_report(radio, REGISTER_REPORT_SIZE);
+ if (retval >= 0)
+ radio->registers[regnr] = (radio->buf[1] << 8) | radio->buf[2];
+
+ return (retval < 0) ? -EINVAL : 0;
+}
+
+
+/*
+ * si470x_set_register - write register
+ */
+static int si470x_set_register(struct si470x_device *radio, int regnr)
+{
+ int retval;
+
+ radio->buf[0] = REGISTER_REPORT(regnr);
+ radio->buf[1] = (radio->registers[regnr] & 0xff00) >> 8;
+ radio->buf[2] = (radio->registers[regnr] & 0x00ff);
+
+ retval = si470x_set_report(radio, REGISTER_REPORT_SIZE);
+
+ return (retval < 0) ? -EINVAL : 0;
+}
+
+
+/*
+ * si470x_get_all_registers - read entire registers
+ */
+static int si470x_get_all_registers(struct si470x_device *radio)
+{
+ int retval;
+ int regnr;
+
+ radio->buf[0] = ENTIRE_REPORT;
+
+ retval = si470x_get_report(radio, ENTIRE_REPORT_SIZE);
+
+ if (retval >= 0)
+ for (regnr = 0; regnr < FMRADIO_REGISTER_NUM; regnr++)
+ radio->registers[regnr] =
+ (radio->buf[regnr * FMRADIO_REGISTER_SIZE + 1] << 8) |
+ radio->buf[regnr * FMRADIO_REGISTER_SIZE + 2];
+
+ return (retval < 0) ? -EINVAL : 0;
+}
+
+
+/*
+ * si470x_get_rds_registers - read rds registers
+ */
+static int si470x_get_rds_registers(struct si470x_device *radio)
+{
+ int retval;
+ int regnr;
+ int size;
+
+ radio->buf[0] = RDS_REPORT;
+
+ retval = usb_interrupt_msg(radio->usbdev,
+ usb_rcvctrlpipe(radio->usbdev, 1),
+ radio->buf, RDS_REPORT_SIZE, &size, usb_timeout);
+
+ if (retval >= 0) {
+ for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++) {
+ radio->registers[STATUSRSSI + regnr] =
+ (radio->buf[regnr * FMRADIO_REGISTER_SIZE + 1] << 8) |
+ radio->buf[regnr * FMRADIO_REGISTER_SIZE + 2];
+ }
+ }
+
+ return (retval < 0) ? - EINVAL : 0;
+}
+
+
+/*
+ * si470x_start - switch on radio
+ */
+static int si470x_start(struct si470x_device *radio)
+{
+ int retval;
+
+ /* powercfg */
+ radio->registers[POWERCFG] =
+ POWERCFG_DMUTE | POWERCFG_ENABLE | POWERCFG_RDSM;
+ retval = si470x_set_register(radio, POWERCFG);
+ if (retval < 0)
+ return retval;
+
+ /* sysconfig 1 */
+ radio->registers[SYSCONFIG1] =
+ SYSCONFIG1_DE | SYSCONFIG1_RDS;
+ retval = si470x_set_register(radio, SYSCONFIG1);
+ if (retval < 0)
+ return retval;
+
+ /* sysconfig 2 */
+ radio->registers[SYSCONFIG2] =
+ (0x3f << 8) | /* SEEKTH */
+ (band << 6) | /* BAND */
+ (space << 4) | /* SPACE */
+ 15; /* VOLUME (max) */
+ retval = si470x_set_register(radio, SYSCONFIG2);
+ if (retval < 0)
+ return retval;
+
+ /* reset last channel */
+ return si470x_set_chan(radio,
+ radio->registers[CHANNEL] & CHANNEL_CHAN);
+}
+
+
+/*
+ * si470x_stop - switch off radio
+ */
+static int si470x_stop(struct si470x_device *radio)
+{
+ /* powercfg */
+ radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
+ /* POWERCFG_ENABLE has to automatically go low */
+ radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE;
+ return si470x_set_register(radio, POWERCFG);
+}
+
+
+/*
+ * si470x_set_chan - set the channel
+ */
+static int si470x_set_chan(struct si470x_device *radio, int chan)
+{
+ int retval, i;
+
+ /* start tuning */
+ radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
+ radio->registers[CHANNEL] |= CHANNEL_TUNE | chan;
+ retval = si470x_set_register(radio, CHANNEL);
+ if (retval < 0)
+ return retval;
+
+ /* wait till seek operation has completed */
+ i = 0;
+ do {
+ retval = si470x_get_register(radio, STATUSRSSI);
+ if (retval < 0)
+ return retval;
+ } while ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) &&
+ (++i < seek_retries));
+ if (i >= seek_retries)
+ printk(KERN_WARNING DRIVER_NAME
+ ": seek does not finish after %d tries\n", i);
+
+ /* stop tuning */
+ radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
+ return si470x_set_register(radio, CHANNEL);
+}
+
+
+/*
+ * si470x_get_freq - get the frequency
+ */
+static int si470x_get_freq(struct si470x_device *radio)
+{
+ int spacing, band_bottom, chan, freq;
+ int retval;
+
+ /* Spacing (kHz) */
+ switch (space) {
+ /* 0: 200 kHz (USA, Australia) */
+ default: spacing = 0.200 * FREQ_MUL; break;
+ /* 1: 100 kHz (Europe, Japan) */
+ case 1 : spacing = 0.100 * FREQ_MUL; break;
+ /* 2: 50 kHz */
+ case 2 : spacing = 0.050 * FREQ_MUL; break;
+ };
+
+ /* Bottom of Band (MHz) */
+ switch (band) {
+ /* 0: 87.5 - 108 MHz (USA, Europe) */
+ default: band_bottom = 87.5 * FREQ_MUL; break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ case 1 : band_bottom = 76 * FREQ_MUL; break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2 : band_bottom = 76 * FREQ_MUL; break;
+ };
+
+ /* read channel */
+ retval = si470x_get_register(radio, READCHAN);
+ if (retval < 0)
+ return retval;
+ chan = radio->registers[READCHAN] & READCHAN_READCHAN;
+
+ /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */
+ freq = chan * spacing + band_bottom;
+
+ return freq;
+}
+
+
+/*
+ * si470x_set_freq - set the frequency
+ */
+static int si470x_set_freq(struct si470x_device *radio, int freq)
+{
+ int spacing, band_bottom, chan;
+
+ /* Spacing (kHz) */
+ switch (space) {
+ /* 0: 200 kHz (USA, Australia) */
+ default: spacing = 0.200 * FREQ_MUL; break;
+ /* 1: 100 kHz (Europe, Japan) */
+ case 1 : spacing = 0.100 * FREQ_MUL; break;
+ /* 2: 50 kHz */
+ case 2 : spacing = 0.050 * FREQ_MUL; break;
+ };
+
+ /* Bottom of Band (MHz) */
+ switch (band) {
+ /* 0: 87.5 - 108 MHz (USA, Europe) */
+ default: band_bottom = 87.5 * FREQ_MUL; break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ case 1 : band_bottom = 76 * FREQ_MUL; break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2 : band_bottom = 76 * FREQ_MUL; break;
+ };
+
+ /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */
+ chan = (freq - band_bottom) / spacing;
+
+ return si470x_set_chan(radio, chan);
+}
+
+
+
+/*
+ * si470x_rds - rds processing function
+ */
+static void si470x_rds(struct si470x_device *radio)
+{
+ unsigned long flags;
+ unsigned char tmpbuf[3];
+ unsigned char blocknum;
+ unsigned char bler; /* RDS block errors */
+ unsigned short rds;
+ unsigned int i;
+
+ if (radio->users == 0)
+ return;
+ if (si470x_get_rds_registers(radio) < 0)
+ return;
+ if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) {
+ /* No RDS group ready */
+ return;
+ }
+ if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) {
+ /* RDS decoder not synchronized */
+ return;
+ }
+
+ 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 */
+ tmpbuf[0] = rds & 0x00ff; /* LSB */
+ tmpbuf[1] = (rds & 0xff00) >> 8;/* MSB */
+ 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) */
+
+ spin_lock_irqsave(&radio->lock, flags);
+
+ /* copy RDS block to internal buffer */
+ for (i = 0; i < 3; i++) {
+ radio->buffer[radio->wr_index] = tmpbuf[i];
+ radio->wr_index++;
+ }
+
+ if (radio->wr_index >= radio->buf_size)
+ radio->wr_index = 0;
+
+ if (radio->wr_index == radio->rd_index) {
+ radio->rd_index += 3;
+ if (radio->rd_index >= radio->buf_size)
+ radio->rd_index = 0;
+ } else
+ radio->block_count++;
+
+ spin_unlock_irqrestore(&radio->lock, flags);
+ }
+
+ radio->data_available_for_read = 1;
+ wake_up_interruptible(&radio->read_queue);
+}
+
+
+/*
+ * si470x_timer - rds timer function
+ */
+static void si470x_timer(unsigned long data)
+{
+ struct si470x_device *radio = (struct si470x_device *) data;
+
+ schedule_work(&radio->work);
+}
+
+
+/*
+ * si470x_timer - rds work function
+ */
+static void si470x_work(struct work_struct *work)
+{
+ struct si470x_device *radio = container_of(work, struct si470x_device,
+ work);
+
+ if (radio->users == 0)
+ return;
+
+ si470x_rds(radio);
+ mod_timer(&radio->timer, jiffies + msecs_to_jiffies(rds_poll_time));
+}
+
+
+
+/**************************************************************************
+ * USB interface functions
+ **************************************************************************/
+
+/*
+ * 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;
+
+ if (!(radio = kmalloc(sizeof(struct si470x_device), GFP_KERNEL)))
+ return -ENOMEM;
+ if (!(radio->videodev = video_device_alloc())) {
+ kfree(radio);
+ return -ENOMEM;
+ }
+ memcpy(radio->videodev, &si470x_viddev_template,
+ sizeof(si470x_viddev_template));
+ radio->users = 0;
+ radio->usbdev = interface_to_usbdev(intf);
+ video_set_drvdata(radio->videodev, radio);
+ if (video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr)) {
+ printk(KERN_WARNING DRIVER_NAME
+ ": Could not register video device\n");
+ video_device_release(radio->videodev);
+ kfree(radio);
+ return -EIO;
+ }
+ usb_set_intfdata(intf, radio);
+
+ /* show some infos about the specific device */
+ if (si470x_get_all_registers(radio) < 0) {
+ video_device_release(radio->videodev);
+ kfree(radio);
+ return -EIO;
+ }
+ printk(KERN_INFO DRIVER_NAME ": DeviceID=0x%4.4x ChipID=0x%4.4x\n",
+ radio->registers[DEVICEID], radio->registers[CHIPID]);
+
+ /* check if firmware is current */
+ if ((radio->registers[CHIPID] & CHIPID_FIRMWARE)
+ < FMRADIO_SW_VERSION_CURRENT) {
+ printk(KERN_WARNING DRIVER_NAME
+ ": This driver is known to work with chip version %d, "
+ "but the device has firmware %d. If you have some "
+ "trouble using this driver, please report to V4L ML "
+ "at video4linux-list@redhat.com\n",
+ radio->registers[CHIPID] & CHIPID_FIRMWARE,
+ FMRADIO_SW_VERSION_CURRENT);
+ }
+
+ /* set initial frequency */
+ si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */
+
+ /* rds initialization */
+ radio->buf_size = rds_buf * 3;
+ if (NULL == (radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL))) {
+ video_device_release(radio->videodev);
+ kfree(radio);
+ return -ENOMEM;
+ }
+ radio->block_count = 0;
+ radio->wr_index = 0;
+ radio->rd_index = 0;
+ radio->last_blocknum = 0xff;
+ init_waitqueue_head(&radio->read_queue);
+ radio->data_available_for_read = 0;
+
+ /* prepare polling via eventd */
+ INIT_WORK(&radio->work, si470x_work);
+ init_timer(&radio->timer);
+ radio->timer.function = si470x_timer;
+ radio->timer.data = (unsigned long) radio;
+
+ return 0;
+}
+
+
+/*
+ * 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);
+
+ del_timer_sync(&radio->timer);
+ flush_scheduled_work();
+
+ usb_set_intfdata(intf, NULL);
+ if (radio) {
+ video_unregister_device(radio->videodev);
+ kfree(radio->buffer);
+ kfree(radio);
+ }
+}
+
+
+
+/**************************************************************************
+ * Video4Linux interface functions
+ **************************************************************************/
+
+/*
+ * si470x_fops_read - read RDS data
+ */
+static ssize_t si470x_fops_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+ struct rds_command cmd;
+ unsigned long flags;
+ unsigned int i;
+ unsigned int rd_blocks;
+
+ cmd.block_count = count / 3; /* each RDS block needs 3 bytes */
+ cmd.result = 0;
+ cmd.buffer = buf;
+ cmd.instance = file;
+
+ /* copy RDS block out of internal buffer */
+ while (!radio->data_available_for_read) {
+ if (wait_event_interruptible(radio->read_queue,
+ radio->data_available_for_read) < 0)
+ return -EINTR;
+ }
+
+ spin_lock_irqsave(&radio->lock, flags);
+ rd_blocks = cmd.block_count;
+ if (rd_blocks > radio->block_count)
+ rd_blocks = radio->block_count;
+
+ if (!rd_blocks) {
+ spin_unlock_irqrestore(&radio->lock, flags);
+ return cmd.result;
+ }
+
+ for (i = 0; i < rd_blocks; i++) {
+ /* copy RDS block to user buffer */
+ if (radio->rd_index == radio->wr_index)
+ break;
+
+ if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
+ break;
+
+ radio->rd_index += 3;
+ if (radio->rd_index >= radio->buf_size)
+ radio->rd_index = 0;
+ radio->block_count--;
+
+ buf += 3;
+ cmd.result += 3;
+ }
+ radio->data_available_for_read = (radio->block_count > 0);
+ spin_unlock_irqrestore(&radio->lock, flags);
+
+ return cmd.result;
+}
+
+
+/*
+ * si470x_fops_poll - poll RDS data
+ */
+static unsigned int si470x_fops_poll(struct file *file,
+ struct poll_table_struct *pts)
+{
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+ int retval;
+
+ retval = 0;
+ if (radio->data_available_for_read)
+ retval = POLLIN | POLLRDNORM;
+ poll_wait(file, &radio->read_queue, pts);
+
+ return retval;
+}
+
+
+/*
+ * si470x_fops_open - file open
+ */
+static int si470x_fops_open(struct inode *inode, struct file *file)
+{
+ int retval;
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+
+ radio->users++;
+ if (radio->users == 1) {
+ retval = si470x_start(radio);
+ if (retval < 0)
+ return retval;
+
+ schedule_work(&radio->work);
+ }
+
+ return 0;
+}
+
+
+/*
+ * si470x_fops_release - file release
+ */
+static int si470x_fops_release(struct inode *inode, struct file *file)
+{
+ int retval;
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+
+ if (!radio)
+ return -ENODEV;
+
+ radio->users--;
+ if (radio->users == 0) {
+ radio->data_available_for_read = 1; /* ? */
+ wake_up_interruptible(&radio->read_queue); /* ? */
+
+ retval = si470x_stop(radio);
+ if (retval < 0)
+ return retval;
+ }
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_querycap - query device capabilities
+ */
+static int si470x_vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *capability)
+{
+ strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
+ strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
+ sprintf(capability->bus_info, "USB");
+ capability->version = DRIVER_VERSION;
+ capability->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_g_input - get input
+ */
+static int si470x_vidioc_g_input(struct file *filp, void *priv,
+ unsigned int *i)
+{
+ *i = 0;
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_s_input - set input
+ */
+static int si470x_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
+{
+ if (i != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_queryctrl - enumerate control items
+ */
+static int si470x_vidioc_queryctrl(struct file *file, void *priv,
+ struct v4l2_queryctrl *qc)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(radio_queryctrl); i++) {
+ if (qc->id && qc->id == radio_queryctrl[i].id) {
+ memcpy(qc, &(radio_queryctrl[i]), sizeof(*qc));
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+
+/*
+ * si470x_vidioc_g_ctrl - get the value of a control
+ */
+static int si470x_vidioc_g_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ ctrl->value = radio->registers[SYSCONFIG2] &
+ SYSCONFIG2_VOLUME;
+ break;
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = ((radio->registers[POWERCFG] &
+ POWERCFG_DMUTE) == 0) ? 1 : 0;
+ break;
+ }
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_s_ctrl - set the value of a control
+ */
+static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
+ struct v4l2_control *ctrl)
+{
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_VOLUME:
+ radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
+ radio->registers[SYSCONFIG2] |= ctrl->value;
+ return si470x_set_register(radio, SYSCONFIG2);
+ case V4L2_CID_AUDIO_MUTE:
+ if (ctrl->value == 1)
+ radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
+ else
+ radio->registers[POWERCFG] |= POWERCFG_DMUTE;
+ return si470x_set_register(radio, POWERCFG);
+ }
+
+ return -EINVAL;
+}
+
+
+/*
+ * si470x_vidioc_g_audio - get audio attributes
+ */
+static int si470x_vidioc_g_audio(struct file *file, void *priv,
+ struct v4l2_audio *audio)
+{
+ if (audio->index > 1)
+ return -EINVAL;
+
+ strcpy(audio->name, "Radio");
+ audio->capability = V4L2_AUDCAP_STEREO;
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_s_audio - set audio attributes
+ */
+static int si470x_vidioc_s_audio(struct file *file, void *priv,
+ struct v4l2_audio *audio)
+{
+ if (audio->index != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_g_tuner - get tuner attributes
+ */
+static int si470x_vidioc_g_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *tuner)
+{
+ int retval;
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+
+ if (tuner->index > 0)
+ return -EINVAL;
+
+ /* read status rssi */
+ retval = si470x_get_register(radio, STATUSRSSI);
+ if (retval < 0)
+ return retval;
+
+ strcpy(tuner->name, "FM");
+ tuner->type = V4L2_TUNER_RADIO;
+ switch(band) {
+ /* 0: 87.5 - 108 MHz (USA, Europe, default) */
+ default:
+ tuner->rangelow = 87.5 * FREQ_MUL;
+ tuner->rangehigh = 108 * FREQ_MUL;
+ break;
+ /* 1: 76 - 108 MHz (Japan wide band) */
+ case 1 :
+ tuner->rangelow = 76 * FREQ_MUL;
+ tuner->rangehigh = 108 * FREQ_MUL;
+ break;
+ /* 2: 76 - 90 MHz (Japan) */
+ case 2 :
+ tuner->rangelow = 76 * FREQ_MUL;
+ tuner->rangehigh = 90 * FREQ_MUL;
+ break;
+ };
+ tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
+ tuner->capability = V4L2_TUNER_CAP_LOW;
+
+ /* Stereo indicator == Stereo (instead of Mono) */
+ if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 1)
+ tuner->audmode = V4L2_TUNER_MODE_STEREO;
+ else
+ tuner->audmode = V4L2_TUNER_MODE_MONO;
+
+ /* min is worst, max is best; signal:0..0xffff; rssi: 0..0xff */
+ tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI)
+ * 0x0101;
+
+ /* automatic frequency control: -1: freq to low, 1 freq to high */
+ tuner->afc = 0;
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_s_tuner - set tuner attributes
+ */
+static int si470x_vidioc_s_tuner(struct file *file, void *priv,
+ struct v4l2_tuner *tuner)
+{
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+
+ if (tuner->index > 0)
+ return -EINVAL;
+
+ if (tuner->audmode == V4L2_TUNER_MODE_MONO)
+ radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */
+ else
+ radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
+
+ return si470x_set_register(radio, POWERCFG);
+}
+
+
+/*
+ * si470x_vidioc_g_frequency - get tuner or modulator radio frequency
+ */
+static int si470x_vidioc_g_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *freq)
+{
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+
+ freq->type = V4L2_TUNER_RADIO;
+ freq->frequency = si470x_get_freq(radio);
+
+ return 0;
+}
+
+
+/*
+ * si470x_vidioc_s_frequency - set tuner or modulator radio frequency
+ */
+static int si470x_vidioc_s_frequency(struct file *file, void *priv,
+ struct v4l2_frequency *freq)
+{
+ struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+
+ if (freq->type != V4L2_TUNER_RADIO)
+ return -EINVAL;
+
+ return si470x_set_freq(radio, freq->frequency);
+}
+
+
+
+/**************************************************************************
+ * Module interface definitions and functions
+ **************************************************************************/
+
+/*
+ * si470x_module_init - module init
+ */
+static int __init si470x_module_init(void)
+{
+ printk(KERN_INFO DRIVER_DESC "\n");
+ return usb_register(&si470x_usb_driver);
+}
+
+
+/*
+ * si470x_module_exit - module exit
+ */
+static void __exit si470x_module_exit(void)
+{
+ usb_deregister(&si470x_usb_driver);
+}
+
+
+module_init(si470x_module_init);
+module_exit(si470x_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION("1.0.2");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff