diff options
Diffstat (limited to 'drivers/media/radio/radio-si470x.c')
| -rw-r--r-- | drivers/media/radio/radio-si470x.c | 1869 |
1 files changed, 0 insertions, 1869 deletions
diff --git a/drivers/media/radio/radio-si470x.c b/drivers/media/radio/radio-si470x.c deleted file mode 100644 index 8e6dd84ed20..00000000000 --- a/drivers/media/radio/radio-si470x.c +++ /dev/null @@ -1,1869 +0,0 @@ -/* - * 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) - * - KWorld USB FM Radio SnapMusic Mobile 700 (FM700) - * - Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) - * - * Copyright (c) 2009 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 - * 2008-01-16 Tobias Lorenz <tobias.lorenz@gmx.net> - * Version 1.0.3 - * - code reordered to avoid function prototypes - * - switch/case defaults are now more user-friendly - * - unified comment style - * - applied all checkpatch.pl v1.12 suggestions - * except the warning about the too long lines with bit comments - * - renamed FMRADIO to RADIO to cut line length (checkpatch.pl) - * 2008-01-22 Tobias Lorenz <tobias.lorenz@gmx.net> - * Version 1.0.4 - * - avoid poss. locking when doing copy_to_user which may sleep - * - RDS is automatically activated on read now - * - code cleaned of unnecessary rds_commands - * - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified - * (thanks to Guillaume RAMOUSSE) - * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net> - * Version 1.0.5 - * - number of seek_retries changed to tune_timeout - * - fixed problem with incomplete tune operations by own buffers - * - optimization of variables and printf types - * - improved error logging - * 2008-01-31 Tobias Lorenz <tobias.lorenz@gmx.net> - * Oliver Neukum <oliver@neukum.org> - * Version 1.0.6 - * - fixed coverity checker warnings in *_usb_driver_disconnect - * - probe()/open() race by correct ordering in probe() - * - DMA coherency rules by separate allocation of all buffers - * - use of endianness macros - * - abuse of spinlock, replaced by mutex - * - racy handling of timer in disconnect, - * replaced by delayed_work - * - racy interruptible_sleep_on(), - * replaced with wait_event_interruptible() - * - handle signals in read() - * 2008-02-08 Tobias Lorenz <tobias.lorenz@gmx.net> - * Oliver Neukum <oliver@neukum.org> - * Version 1.0.7 - * - usb autosuspend support - * - unplugging fixed - * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net> - * Version 1.0.8 - * - hardware frequency seek support - * - afc indication - * - more safety checks, let si470x_get_freq return errno - * - vidioc behavior corrected according to v4l2 spec - * 2008-10-20 Alexey Klimov <klimov.linux@gmail.com> - * - add support for KWorld USB FM Radio FM700 - * - blacklisted KWorld radio in hid-core.c and hid-ids.h - * 2008-12-03 Mark Lord <mlord@pobox.com> - * - add support for DealExtreme USB Radio - * 2009-01-31 Bob Ross <pigiron@gmx.com> - * - correction of stereo detection/setting - * - correction of signal strength indicator scaling - * 2009-01-31 Rick Bronson <rick@efn.org> - * Tobias Lorenz <tobias.lorenz@gmx.net> - * - add LED status output - * - get HW/SW version from scratchpad - * 2009-06-16 Edouard Lafargue <edouard@lafargue.name> - * Version 1.0.10 - * - add support for interrupt mode for RDS endpoint, - * instead of polling. - * Improves RDS reception significantly - * - * ToDo: - * - add firmware download/update support - */ - - -/* driver definitions */ -#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>" -#define DRIVER_NAME "radio-si470x" -#define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 10) -#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/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/smp_lock.h> -#include <linux/input.h> -#include <linux/usb.h> -#include <linux/hid.h> -#include <linux/version.h> -#include <linux/videodev2.h> -#include <linux/mutex.h> -#include <media/v4l2-common.h> -#include <media/v4l2-ioctl.h> -#include <media/rds.h> -#include <asm/unaligned.h> - - -/* USB Device ID List */ -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) }, - /* 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) }, - /* 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"); - -/* Spacing (kHz) */ -/* 0: 200 kHz (USA, Australia) */ -/* 1: 100 kHz (Europe, Japan) */ -/* 2: 50 kHz */ -static unsigned short space = 2; -module_param(space, ushort, 0444); -MODULE_PARM_DESC(space, "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 unsigned short band = 1; -module_param(band, ushort, 0444); -MODULE_PARM_DESC(band, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz"); - -/* De-emphasis */ -/* 0: 75 us (USA) */ -/* 1: 50 us (Europe, Australia, Japan) */ -static unsigned short de = 1; -module_param(de, ushort, 0444); -MODULE_PARM_DESC(de, "De-emphasis: 0=75us *1=50us*"); - -/* USB timeout */ -static unsigned int usb_timeout = 500; -module_param(usb_timeout, uint, 0644); -MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*"); - -/* Tune timeout */ -static unsigned int tune_timeout = 3000; -module_param(tune_timeout, uint, 0644); -MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*"); - -/* Seek timeout */ -static unsigned int seek_timeout = 5000; -module_param(seek_timeout, uint, 0644); -MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*"); - -/* 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*"); - - -/************************************************************************** - * Register Definitions - **************************************************************************/ -#define RADIO_REGISTER_SIZE 2 /* 16 register bit width */ -#define RADIO_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 (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 - - - -/************************************************************************** - * Software/Hardware Versions - **************************************************************************/ -#define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6 -#define RADIO_SW_VERSION 7 -#define RADIO_SW_VERSION_CURRENT 15 -#define RADIO_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 - - - -/************************************************************************** - * General Driver Definitions - **************************************************************************/ - -/* - * si470x_device - private data - */ -struct si470x_device { - /* reference to USB and video device */ - struct usb_device *usbdev; - struct usb_interface *intf; - struct video_device *videodev; - - /* Interrupt endpoint handling */ - char *int_in_buffer; - struct usb_endpoint_descriptor *int_in_endpoint; - struct urb *int_in_urb; - int int_in_running; - - /* driver management */ - unsigned int users; - unsigned char disconnected; - struct mutex disconnect_lock; - - /* Silabs internal registers (0..15) */ - unsigned short registers[RADIO_REGISTER_NUM]; - - /* RDS receive buffer */ - wait_queue_head_t read_queue; - struct mutex lock; /* buffer locking */ - unsigned char *buffer; /* size is always multiple of three */ - unsigned int buf_size; - unsigned int rd_index; - unsigned int wr_index; - - /* scratch page */ - unsigned char software_version; - unsigned char hardware_version; -}; - - -/* - * 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) - - - -/************************************************************************** - * 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 = (unsigned char *) 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) - printk(KERN_WARNING DRIVER_NAME - ": 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 = (unsigned char *) 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) - printk(KERN_WARNING DRIVER_NAME - ": 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) -{ - unsigned char buf[REGISTER_REPORT_SIZE]; - int retval; - - buf[0] = REGISTER_REPORT(regnr); - - retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); - - if (retval >= 0) - radio->registers[regnr] = get_unaligned_be16(&buf[1]); - - return (retval < 0) ? -EINVAL : 0; -} - - -/* - * si470x_set_register - write register - */ -static int si470x_set_register(struct si470x_device *radio, int regnr) -{ - unsigned char buf[REGISTER_REPORT_SIZE]; - int retval; - - buf[0] = REGISTER_REPORT(regnr); - put_unaligned_be16(radio->registers[regnr], &buf[1]); - - retval = si470x_set_report(radio, (void *) &buf, sizeof(buf)); - - return (retval < 0) ? -EINVAL : 0; -} - - -/* - * si470x_set_chan - set the channel - */ -static int si470x_set_chan(struct si470x_device *radio, unsigned short chan) -{ - int retval; - unsigned long timeout; - bool timed_out = 0; - - /* start tuning */ - radio->registers[CHANNEL] &= ~CHANNEL_CHAN; - radio->registers[CHANNEL] |= CHANNEL_TUNE | chan; - retval = si470x_set_register(radio, CHANNEL); - if (retval < 0) - goto done; - - /* wait till tune operation has completed */ - timeout = jiffies + msecs_to_jiffies(tune_timeout); - do { - retval = si470x_get_register(radio, STATUSRSSI); - if (retval < 0) - goto stop; - timed_out = time_after(jiffies, timeout); - } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) && - (!timed_out)); - if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) - printk(KERN_WARNING DRIVER_NAME ": tune does not complete\n"); - if (timed_out) - printk(KERN_WARNING DRIVER_NAME - ": tune timed out after %u ms\n", tune_timeout); - -stop: - /* stop tuning */ - radio->registers[CHANNEL] &= ~CHANNEL_TUNE; - retval = si470x_set_register(radio, CHANNEL); - -done: - return retval; -} - - -/* - * si470x_get_freq - get the frequency - */ -static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq) -{ - unsigned int spacing, band_bottom; - unsigned short chan; - int retval; - - /* Spacing (kHz) */ - switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) { - /* 0: 200 kHz (USA, Australia) */ - case 0: - spacing = 0.200 * FREQ_MUL; break; - /* 1: 100 kHz (Europe, Japan) */ - case 1: - spacing = 0.100 * FREQ_MUL; break; - /* 2: 50 kHz */ - default: - spacing = 0.050 * FREQ_MUL; break; - }; - - /* Bottom of Band (MHz) */ - switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { - /* 0: 87.5 - 108 MHz (USA, Europe) */ - case 0: - band_bottom = 87.5 * FREQ_MUL; break; - /* 1: 76 - 108 MHz (Japan wide band) */ - default: - 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); - chan = radio->registers[READCHAN] & READCHAN_READCHAN; - - /* Frequency (MHz) = Spacing (kHz) x Channel + Bottom of Band (MHz) */ - *freq = chan * spacing + band_bottom; - - return retval; -} - - -/* - * si470x_set_freq - set the frequency - */ -static int si470x_set_freq(struct si470x_device *radio, unsigned int freq) -{ - unsigned int spacing, band_bottom; - unsigned short chan; - - /* Spacing (kHz) */ - switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) { - /* 0: 200 kHz (USA, Australia) */ - case 0: - spacing = 0.200 * FREQ_MUL; break; - /* 1: 100 kHz (Europe, Japan) */ - case 1: - spacing = 0.100 * FREQ_MUL; break; - /* 2: 50 kHz */ - default: - spacing = 0.050 * FREQ_MUL; break; - }; - - /* Bottom of Band (MHz) */ - switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { - /* 0: 87.5 - 108 MHz (USA, Europe) */ - case 0: - band_bottom = 87.5 * FREQ_MUL; break; - /* 1: 76 - 108 MHz (Japan wide band) */ - default: - 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_set_seek - set seek - */ -static int si470x_set_seek(struct si470x_device *radio, - unsigned int wrap_around, unsigned int seek_upward) -{ - int retval = 0; - unsigned long timeout; - bool timed_out = 0; - - /* start seeking */ - radio->registers[POWERCFG] |= POWERCFG_SEEK; - if (wrap_around == 1) - radio->registers[POWERCFG] &= ~POWERCFG_SKMODE; - else - radio->registers[POWERCFG] |= POWERCFG_SKMODE; - if (seek_upward == 1) - radio->registers[POWERCFG] |= POWERCFG_SEEKUP; - else - radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP; - retval = si470x_set_register(radio, POWERCFG); - if (retval < 0) - goto done; - - /* wait till seek operation has completed */ - timeout = jiffies + msecs_to_jiffies(seek_timeout); - do { - retval = si470x_get_register(radio, STATUSRSSI); - if (retval < 0) - goto stop; - timed_out = time_after(jiffies, timeout); - } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) && - (!timed_out)); - if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) - printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n"); - if (radio->registers[STATUSRSSI] & STATUSRSSI_SF) - printk(KERN_WARNING DRIVER_NAME - ": seek failed / band limit reached\n"); - if (timed_out) - printk(KERN_WARNING DRIVER_NAME - ": seek timed out after %u ms\n", seek_timeout); - -stop: - /* stop seeking */ - radio->registers[POWERCFG] &= ~POWERCFG_SEEK; - retval = si470x_set_register(radio, POWERCFG); - -done: - /* try again, if timed out */ - if ((retval == 0) && timed_out) - retval = -EAGAIN; - - return retval; -} - - -/* - * 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) - goto done; - - /* sysconfig 1 */ - radio->registers[SYSCONFIG1] = SYSCONFIG1_DE; - retval = si470x_set_register(radio, SYSCONFIG1); - if (retval < 0) - goto done; - - /* sysconfig 2 */ - radio->registers[SYSCONFIG2] = - (0x3f << 8) | /* SEEKTH */ - ((band << 6) & SYSCONFIG2_BAND) | /* BAND */ - ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */ - 15; /* VOLUME (max) */ - retval = si470x_set_register(radio, SYSCONFIG2); - if (retval < 0) - goto done; - - /* reset last channel */ - retval = si470x_set_chan(radio, - radio->registers[CHANNEL] & CHANNEL_CHAN); - -done: - return retval; -} - - -/* - * si470x_stop - switch off radio - */ -static int si470x_stop(struct si470x_device *radio) -{ - int retval; - - /* sysconfig 1 */ - radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS; - retval = si470x_set_register(radio, SYSCONFIG1); - if (retval < 0) - goto done; - - /* powercfg */ - radio->registers[POWERCFG] &= ~POWERCFG_DMUTE; - /* POWERCFG_ENABLE has to automatically go low */ - radio->registers[POWERCFG] |= POWERCFG_ENABLE | POWERCFG_DISABLE; - retval = si470x_set_register(radio, POWERCFG); - -done: - return retval; -} - - -/* - * si470x_rds_on - switch on rds reception - */ -static int si470x_rds_on(struct si470x_device *radio) -{ - int retval; - - /* sysconfig 1 */ - mutex_lock(&radio->lock); - radio->registers[SYSCONFIG1] |= SYSCONFIG1_RDS; - retval = si470x_set_register(radio, SYSCONFIG1); - if (retval < 0) - radio->registers[SYSCONFIG1] &= ~SYSCONFIG1_RDS; - mutex_unlock(&radio->lock); - - return retval; -} - - - -/************************************************************************** - * General Driver Functions - ENTIRE_REPORT - **************************************************************************/ - -/* - * si470x_get_all_registers - read entire registers - */ -static int si470x_get_all_registers(struct si470x_device *radio) -{ - unsigned char buf[ENTIRE_REPORT_SIZE]; - int retval; - unsigned char regnr; - - buf[0] = ENTIRE_REPORT; - - retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); - - if (retval >= 0) - for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++) - radio->registers[regnr] = get_unaligned_be16( - &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) -{ - unsigned char buf[LED_REPORT_SIZE]; - int retval; - - buf[0] = LED_REPORT; - buf[1] = LED_COMMAND; - buf[2] = led_state; - - retval = si470x_set_report(radio, (void *) &buf, sizeof(buf)); - - 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) -{ - unsigned char buf[SCRATCH_REPORT_SIZE]; - int retval; - - buf[0] = SCRATCH_REPORT; - - retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); - - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME ": si470x_get_scratch: " - "si470x_get_report returned %d\n", retval); - else { - radio->software_version = buf[1]; - radio->hardware_version = 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; - unsigned char buf[RDS_REPORT_SIZE]; - 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 { - printk(KERN_WARNING DRIVER_NAME - ": non-zero urb status (%d)\n", urb->status); - goto resubmit; /* Maybe we can recover. */ - } - } - - /* safety checks */ - if (radio->disconnected) - return; - if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) - goto resubmit; - - if (urb->actual_length > 0) { - /* Update RDS registers with URB data */ - buf[0] = RDS_REPORT; - for (regnr = 0; 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) { - printk(KERN_WARNING DRIVER_NAME - ": resubmitting urb failed (%d)", retval); - radio->int_in_running = 0; - } - } -} - - - -/************************************************************************** - * File Operations Interface - **************************************************************************/ - -/* - * 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_drvdata(file); - int retval = 0; - unsigned int block_count = 0; - - /* switch on rds reception */ - if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) { - si470x_rds_on(radio); - } - - /* block if no new data available */ - while (radio->wr_index == radio->rd_index) { - if (file->f_flags & O_NONBLOCK) { - retval = -EWOULDBLOCK; - goto done; - } - if (wait_event_interruptible(radio->read_queue, - radio->wr_index != radio->rd_index) < 0) { - retval = -EINTR; - goto done; - } - } - - /* calculate block count from byte count */ - count /= 3; - - /* copy RDS block out of internal buffer and to user buffer */ - mutex_lock(&radio->lock); - while (block_count < count) { - if (radio->rd_index == radio->wr_index) - break; - - /* always transfer rds complete blocks */ - if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3)) - /* retval = -EFAULT; */ - break; - - /* increment and wrap read pointer */ - radio->rd_index += 3; - if (radio->rd_index >= radio->buf_size) - radio->rd_index = 0; - - /* increment counters */ - block_count++; - buf += 3; - retval += 3; - } - mutex_unlock(&radio->lock); - -done: - return retval; -} - - -/* - * 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_drvdata(file); - int retval = 0; - - /* switch on rds reception */ - if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) { - si470x_rds_on(radio); - } - - poll_wait(file, &radio->read_queue, pts); - - if (radio->rd_index != radio->wr_index) - retval = POLLIN | POLLRDNORM; - - return retval; -} - - -/* - * si470x_fops_open - file open - */ -static int si470x_fops_open(struct file *file) -{ - struct si470x_device *radio = video_drvdata(file); - int retval; - - lock_kernel(); - radio->users++; - - retval = usb_autopm_get_interface(radio->intf); - if (retval < 0) { - radio->users--; - retval = -EIO; - goto done; - } - - if (radio->users == 1) { - /* start radio */ - retval = si470x_start(radio); - if (retval < 0) { - usb_autopm_put_interface(radio->intf); - goto done; - } - - /* 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) { - printk(KERN_INFO DRIVER_NAME - ": submitting int urb failed (%d)\n", retval); - radio->int_in_running = 0; - usb_autopm_put_interface(radio->intf); - } - } - -done: - unlock_kernel(); - return retval; -} - - -/* - * si470x_fops_release - file release - */ -static int si470x_fops_release(struct file *file) -{ - struct si470x_device *radio = video_drvdata(file); - int retval = 0; - - /* safety check */ - if (!radio) { - retval = -ENODEV; - goto done; - } - - mutex_lock(&radio->disconnect_lock); - radio->users--; - if (radio->users == 0) { - /* 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); - } - - if (radio->disconnected) { - video_unregister_device(radio->videodev); - kfree(radio->int_in_buffer); - kfree(radio->buffer); - kfree(radio); - goto unlock; - } - - /* cancel read processes */ - wake_up_interruptible(&radio->read_queue); - - /* stop radio */ - retval = si470x_stop(radio); - usb_autopm_put_interface(radio->intf); - } -unlock: - mutex_unlock(&radio->disconnect_lock); -done: - return retval; -} - - -/* - * si470x_fops - file operations interface - */ -static const struct v4l2_file_operations si470x_fops = { - .owner = THIS_MODULE, - .read = si470x_fops_read, - .poll = si470x_fops_poll, - .ioctl = video_ioctl2, - .open = si470x_fops_open, - .release = si470x_fops_release, -}; - - - -/************************************************************************** - * 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); - - strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver)); - strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); - usb_make_path(radio->usbdev, capability->bus_info, sizeof(capability->bus_info)); - capability->version = DRIVER_KERNEL_VERSION; - capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | - V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE; - - return 0; -} - - -/* - * si470x_vidioc_queryctrl - enumerate control items - */ -static int si470x_vidioc_queryctrl(struct file *file, void *priv, - struct v4l2_queryctrl *qc) -{ - int retval = -EINVAL; - - /* abort if qc->id is below V4L2_CID_BASE */ - if (qc->id < V4L2_CID_BASE) - goto done; - - /* search video control */ - switch (qc->id) { - case V4L2_CID_AUDIO_VOLUME: - return v4l2_ctrl_query_fill(qc, 0, 15, 1, 15); - case V4L2_CID_AUDIO_MUTE: - return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); - } - - /* disable unsupported base controls */ - /* to satisfy kradio and such apps */ - if ((retval == -EINVAL) && (qc->id < V4L2_CID_LASTP1)) { - qc->flags = V4L2_CTRL_FLAG_DISABLED; - retval = 0; - } - -done: - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME - ": query controls failed with %d\n", retval); - return retval; -} - - -/* - * 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_drvdata(file); - int retval = 0; - - /* safety checks */ - if (radio->disconnected) { - retval = -EIO; - goto done; - } - - 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; - default: - retval = -EINVAL; - } - -done: - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME - ": get control failed with %d\n", retval); - return retval; -} - - -/* - * 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_drvdata(file); - int retval = 0; - - /* safety checks */ - if (radio->disconnected) { - retval = -EIO; - goto done; - } - - switch (ctrl->id) { - case V4L2_CID_AUDIO_VOLUME: - radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME; - radio->registers[SYSCONFIG2] |= ctrl->value; - retval = si470x_set_register(radio, SYSCONFIG2); - break; - case V4L2_CID_AUDIO_MUTE: - if (ctrl->value == 1) - radio->registers[POWERCFG] &= ~POWERCFG_DMUTE; - else - radio->registers[POWERCFG] |= POWERCFG_DMUTE; - retval = si470x_set_register(radio, POWERCFG); - break; - default: - retval = -EINVAL; - } - -done: - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME - ": set control failed with %d\n", retval); - return retval; -} - - -/* - * si470x_vidioc_g_audio - get audio attributes - */ -static int si470x_vidioc_g_audio(struct file *file, void *priv, - struct v4l2_audio *audio) -{ - /* driver constants */ - audio->index = 0; - strcpy(audio->name, "Radio"); - audio->capability = V4L2_AUDCAP_STEREO; - audio->mode = 0; - - return 0; -} - - -/* - * si470x_vidioc_g_tuner - get tuner attributes - */ -static int si470x_vidioc_g_tuner(struct file *file, void *priv, - struct v4l2_tuner *tuner) -{ - struct si470x_device *radio = video_drvdata(file); - int retval = 0; - - /* safety checks */ - if (radio->disconnected) { - retval = -EIO; - goto done; - } - if (tuner->index != 0) { - retval = -EINVAL; - goto done; - } - - retval = si470x_get_register(radio, STATUSRSSI); - if (retval < 0) - goto done; - - /* driver constants */ - strcpy(tuner->name, "FM"); - tuner->type = V4L2_TUNER_RADIO; - tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | - V4L2_TUNER_CAP_RDS; - - /* range limits */ - switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_BAND) >> 6) { - /* 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; - }; - - /* stereo indicator == stereo (instead of mono) */ - if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0) - tuner->rxsubchans = V4L2_TUNER_SUB_MONO; - else - tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; - /* If there is a reliable method of detecting an RDS channel, - then this code should check for that before setting this - RDS subchannel. */ - tuner->rxsubchans |= V4L2_TUNER_SUB_RDS; - - /* mono/stereo selector */ - if ((radio->registers[POWERCFG] & POWERCFG_MONO) == 0) - 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 */ - /* measured in units of dbµV in 1 db increments (max at ~75 dbµV) */ - tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI); - /* the ideal factor is 0xffff/75 = 873,8 */ - tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10); - - /* automatic frequency control: -1: freq to low, 1 freq to high */ - /* AFCRL does only indicate that freq. differs, not if too low/high */ - tuner->afc = (radio->registers[STATUSRSSI] & STATUSRSSI_AFCRL) ? 1 : 0; - -done: - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME - ": get tuner failed with %d\n", retval); - return retval; -} - - -/* - * 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_drvdata(file); - int retval = -EINVAL; - - /* safety checks */ - if (radio->disconnected) { - retval = -EIO; - goto done; - } - if (tuner->index != 0) - goto done; - - /* mono/stereo selector */ - switch (tuner->audmode) { - case V4L2_TUNER_MODE_MONO: - radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */ - break; - case V4L2_TUNER_MODE_STEREO: - radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */ - break; - default: - goto done; - } - - retval = si470x_set_register(radio, POWERCFG); - -done: - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME - ": set tuner failed with %d\n", retval); - return retval; -} - - -/* - * 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_drvdata(file); - int retval = 0; - - /* safety checks */ - if (radio->disconnected) { - retval = -EIO; - goto done; - } - if (freq->tuner != 0) { - retval = -EINVAL; - goto done; - } - - freq->type = V4L2_TUNER_RADIO; - retval = si470x_get_freq(radio, &freq->frequency); - -done: - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME - ": get frequency failed with %d\n", retval); - return retval; -} - - -/* - * 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_drvdata(file); - int retval = 0; - - /* safety checks */ - if (radio->disconnected) { - retval = -EIO; - goto done; - } - if (freq->tuner != 0) { - retval = -EINVAL; - goto done; - } - - retval = si470x_set_freq(radio, freq->frequency); - -done: - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME - ": set frequency failed with %d\n", retval); - return retval; -} - - -/* - * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek - */ -static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv, - struct v4l2_hw_freq_seek *seek) -{ - struct si470x_device *radio = video_drvdata(file); - int retval = 0; - - /* safety checks */ - if (radio->disconnected) { - retval = -EIO; - goto done; - } - if (seek->tuner != 0) { - retval = -EINVAL; - goto done; - } - - retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward); - -done: - if (retval < 0) - printk(KERN_WARNING DRIVER_NAME - ": set hardware frequency seek failed with %d\n", - retval); - return retval; -} - - -/* - * si470x_ioctl_ops - video device ioctl operations - */ -static const struct v4l2_ioctl_ops si470x_ioctl_ops = { - .vidioc_querycap = si470x_vidioc_querycap, - .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_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, - .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek, -}; - - -/* - * si470x_viddev_template - video device interface - */ -static struct video_device si470x_viddev_template = { - .fops = &si470x_fops, - .name = DRIVER_NAME, - .release = video_device_release, - .ioctl_ops = &si470x_ioctl_ops, -}; - - - -/************************************************************************** - * 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 = 0; - - /* private data allocation and initialization */ - radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL); - if (!radio) { - retval = -ENOMEM; - goto err_initial; - } - radio->users = 0; - radio->disconnected = 0; - radio->usbdev = interface_to_usbdev(intf); - radio->intf = intf; - mutex_init(&radio->disconnect_lock); - mutex_init(&radio->lock); - - 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 (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == - USB_DIR_IN) && ((endpoint->bmAttributes & - USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) - radio->int_in_endpoint = endpoint; - } - if (!radio->int_in_endpoint) { - printk(KERN_INFO DRIVER_NAME - ": could not find interrupt in endpoint\n"); - retval = -EIO; - goto err_radio; - } - - 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) { - printk(KERN_INFO DRIVER_NAME - "could not allocate int_in_buffer"); - retval = -ENOMEM; - goto err_radio; - } - - radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL); - if (!radio->int_in_urb) { - printk(KERN_INFO DRIVER_NAME "could not allocate int_in_urb"); - retval = -ENOMEM; - goto err_intbuffer; - } - - /* video device allocation and initialization */ - radio->videodev = video_device_alloc(); - if (!radio->videodev) { - retval = -ENOMEM; - goto err_intbuffer; - } - memcpy(radio->videodev, &si470x_viddev_template, - sizeof(si470x_viddev_template)); - video_set_drvdata(radio->videodev, radio); - - /* show some infos about the specific si470x device */ - if (si470x_get_all_registers(radio) < 0) { - retval = -EIO; - goto err_video; - } - printk(KERN_INFO DRIVER_NAME ": DeviceID=0x%4.4hx ChipID=0x%4.4hx\n", - radio->registers[DEVICEID], radio->registers[CHIPID]); - - /* get software and hardware versions */ - if (si470x_get_scratch_page_versions(radio) < 0) { - retval = -EIO; - goto err_video; - } - printk(KERN_INFO DRIVER_NAME - ": software version %d, hardware version %d\n", - radio->software_version, radio->hardware_version); - - /* check if device and firmware is current */ - if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) - < RADIO_SW_VERSION_CURRENT) { - printk(KERN_WARNING DRIVER_NAME - ": This driver is known to work with " - "firmware version %hu,\n", RADIO_SW_VERSION_CURRENT); - printk(KERN_WARNING DRIVER_NAME - ": but the device has firmware version %hu.\n", - radio->registers[CHIPID] & CHIPID_FIRMWARE); - printk(KERN_WARNING DRIVER_NAME - ": If you have some trouble using this driver,\n"); - printk(KERN_WARNING DRIVER_NAME - ": please report to V4L ML at " - "linux-media@vger.kernel.org\n"); - } - - /* set initial frequency */ - si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */ - - /* 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_video; - } - - /* rds buffer configuration */ - radio->wr_index = 0; - radio->rd_index = 0; - init_waitqueue_head(&radio->read_queue); - - /* register video device */ - retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); - if (retval) { - printk(KERN_WARNING DRIVER_NAME - ": Could not register video device\n"); - goto err_all; - } - usb_set_intfdata(intf, radio); - - return 0; -err_all: - kfree(radio->buffer); -err_video: - video_device_release(radio->videodev); -err_intbuffer: - kfree(radio->int_in_buffer); -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) -{ - printk(KERN_INFO DRIVER_NAME ": suspending now...\n"); - - return 0; -} - - -/* - * si470x_usb_driver_resume - resume the device - */ -static int si470x_usb_driver_resume(struct usb_interface *intf) -{ - printk(KERN_INFO DRIVER_NAME ": resuming now...\n"); - - 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); - - mutex_lock(&radio->disconnect_lock); - radio->disconnected = 1; - usb_set_intfdata(intf, NULL); - if (radio->users == 0) { - /* set led to disconnect state */ - si470x_set_led_state(radio, BLINK_ORANGE_LED); - - /* Free data structures. */ - usb_free_urb(radio->int_in_urb); - - kfree(radio->int_in_buffer); - video_unregister_device(radio->videodev); - kfree(radio->buffer); - kfree(radio); - } - mutex_unlock(&radio->disconnect_lock); -} - - -/* - * si470x_usb_driver - usb driver interface - */ -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, - .id_table = si470x_usb_driver_id_table, - .supports_autosuspend = 1, -}; - - - -/************************************************************************** - * Module Interface - **************************************************************************/ - -/* - * si470x_module_init - module init - */ -static int __init si470x_module_init(void) -{ - printk(KERN_INFO DRIVER_DESC ", Version " DRIVER_VERSION "\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(DRIVER_VERSION); |