diff options
Diffstat (limited to 'drivers/media/radio/si470x')
-rw-r--r-- | drivers/media/radio/si470x/Kconfig | 37 | ||||
-rw-r--r-- | drivers/media/radio/si470x/Makefile | 9 | ||||
-rw-r--r-- | drivers/media/radio/si470x/radio-si470x-common.c | 798 | ||||
-rw-r--r-- | drivers/media/radio/si470x/radio-si470x-i2c.c | 401 | ||||
-rw-r--r-- | drivers/media/radio/si470x/radio-si470x-usb.c | 988 | ||||
-rw-r--r-- | drivers/media/radio/si470x/radio-si470x.h | 225 |
6 files changed, 2458 insertions, 0 deletions
diff --git a/drivers/media/radio/si470x/Kconfig b/drivers/media/radio/si470x/Kconfig new file mode 100644 index 0000000..a466654 --- /dev/null +++ b/drivers/media/radio/si470x/Kconfig @@ -0,0 +1,37 @@ +config USB_SI470X + tristate "Silicon Labs Si470x FM Radio Receiver support with USB" + depends on USB && RADIO_SI470X + ---help--- + This is a driver for USB devices with the Silicon Labs SI470x + chip. Currently these devices are known to work: + - 10c4:818a: Silicon Labs USB FM Radio Reference Design + - 06e1:a155: ADS/Tech FM Radio Receiver (formerly Instant FM Music) + - 1b80:d700: KWorld USB FM Radio SnapMusic Mobile 700 (FM700) + - 10c5:819a: Sanei Electric FM USB Radio (aka DealExtreme.com PCear) + + Sound is provided by the ALSA USB Audio/MIDI driver. Therefore + if you don't want to use the device solely for RDS receiving, + it is recommended to also select SND_USB_AUDIO. + + Please have a look at the documentation, especially on how + to redirect the audio stream from the radio to your sound device: + Documentation/video4linux/si470x.txt + + Say Y here if you want to connect this type of radio to your + computer's USB port. + + To compile this driver as a module, choose M here: the + module will be called radio-usb-si470x. + +config I2C_SI470X + tristate "Silicon Labs Si470x FM Radio Receiver support with I2C" + depends on I2C && RADIO_SI470X && !USB_SI470X + ---help--- + This is a driver for I2C devices with the Silicon Labs SI470x + chip. + + Say Y here if you want to connect this type of radio to your + computer's I2C port. + + To compile this driver as a module, choose M here: the + module will be called radio-i2c-si470x. diff --git a/drivers/media/radio/si470x/Makefile b/drivers/media/radio/si470x/Makefile new file mode 100644 index 0000000..0696481 --- /dev/null +++ b/drivers/media/radio/si470x/Makefile @@ -0,0 +1,9 @@ +# +# Makefile for radios with Silicon Labs Si470x FM Radio Receivers +# + +radio-usb-si470x-objs := radio-si470x-usb.o radio-si470x-common.o +radio-i2c-si470x-objs := radio-si470x-i2c.o radio-si470x-common.o + +obj-$(CONFIG_USB_SI470X) += radio-usb-si470x.o +obj-$(CONFIG_I2C_SI470X) += radio-i2c-si470x.o diff --git a/drivers/media/radio/si470x/radio-si470x-common.c b/drivers/media/radio/si470x/radio-si470x-common.c new file mode 100644 index 0000000..f33315f --- /dev/null +++ b/drivers/media/radio/si470x/radio-si470x-common.c @@ -0,0 +1,798 @@ +/* + * drivers/media/radio/si470x/radio-si470x-common.c + * + * Driver for radios with Silicon Labs Si470x FM Radio Receivers + * + * 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 + */ + + +/* kernel includes */ +#include "radio-si470x.h" + + + +/************************************************************************** + * Module Parameters + **************************************************************************/ + +/* 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*"); + +/* 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*"); + + + +/************************************************************************** + * Generic Functions + **************************************************************************/ + +/* + * 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) + dev_warn(&radio->videodev->dev, "tune does not complete\n"); + if (timed_out) + dev_warn(&radio->videodev->dev, + "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 + */ +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) + dev_warn(&radio->videodev->dev, "seek does not complete\n"); + if (radio->registers[STATUSRSSI] & STATUSRSSI_SF) + dev_warn(&radio->videodev->dev, + "seek failed / band limit reached\n"); + if (timed_out) + dev_warn(&radio->videodev->dev, + "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 + */ +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 + */ +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 + */ +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; +} + + + +/************************************************************************** + * Video4Linux Interface + **************************************************************************/ + +/* + * si470x_vidioc_queryctrl - enumerate control items + */ +static int si470x_vidioc_queryctrl(struct file *file, void *priv, + struct v4l2_queryctrl *qc) +{ + struct si470x_device *radio = video_drvdata(file); + 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) + dev_warn(&radio->videodev->dev, + "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 */ + retval = si470x_disconnect_check(radio); + if (retval) + 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) + dev_warn(&radio->videodev->dev, + "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 */ + retval = si470x_disconnect_check(radio); + if (retval) + 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) + dev_warn(&radio->videodev->dev, + "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 */ + retval = si470x_disconnect_check(radio); + if (retval) + 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; +#if defined(CONFIG_USB_SI470X) || defined(CONFIG_USB_SI470X_MODULE) + tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_RDS; +#else + tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO; +#endif + + /* 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 defined(CONFIG_USB_SI470X) || defined(CONFIG_USB_SI470X_MODULE) + /* 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; +#endif + + /* 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 db쨉V in 1 db increments (max at ~75 db쨉V) */ + 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) + dev_warn(&radio->videodev->dev, + "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 */ + retval = si470x_disconnect_check(radio); + if (retval) + 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) + dev_warn(&radio->videodev->dev, + "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 */ + retval = si470x_disconnect_check(radio); + if (retval) + 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) + dev_warn(&radio->videodev->dev, + "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 */ + retval = si470x_disconnect_check(radio); + if (retval) + goto done; + + if (freq->tuner != 0) { + retval = -EINVAL; + goto done; + } + + retval = si470x_set_freq(radio, freq->frequency); + +done: + if (retval < 0) + dev_warn(&radio->videodev->dev, + "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 */ + retval = si470x_disconnect_check(radio); + if (retval) + 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) + dev_warn(&radio->videodev->dev, + "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 + */ +struct video_device si470x_viddev_template = { + .fops = &si470x_fops, + .name = DRIVER_NAME, + .release = video_device_release, + .ioctl_ops = &si470x_ioctl_ops, +}; diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c new file mode 100644 index 0000000..2d53b6a --- /dev/null +++ b/drivers/media/radio/si470x/radio-si470x-i2c.c @@ -0,0 +1,401 @@ +/* + * drivers/media/radio/si470x/radio-si470x-i2c.c + * + * I2C driver for radios with Silicon Labs Si470x FM Radio Receivers + * + * Copyright (c) 2009 Samsung Electronics Co.Ltd + * Author: Joonyoung Shim <jy0922.shim@samsung.com> + * + * 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 + */ + + +/* + * ToDo: + * - RDS support + */ + + +/* driver definitions */ +#define DRIVER_AUTHOR "Joonyoung Shim <jy0922.shim@samsung.com>"; +#define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 0) +#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver" +#define DRIVER_DESC "I2C radio driver for Si470x FM Radio Receivers" +#define DRIVER_VERSION "1.0.0" + +/* kernel includes */ +#include <linux/i2c.h> +#include <linux/delay.h> + +#include "radio-si470x.h" + + +/* I2C Device ID List */ +static const struct i2c_device_id si470x_i2c_id[] = { + /* Generic Entry */ + { "si470x", 0 }, + /* Terminating entry */ + { } +}; +MODULE_DEVICE_TABLE(i2c, si470x_i2c_id); + + + +/************************************************************************** + * Module Parameters + **************************************************************************/ + +/* Radio Nr */ +static int radio_nr = -1; +module_param(radio_nr, int, 0444); +MODULE_PARM_DESC(radio_nr, "Radio Nr"); + + + +/************************************************************************** + * I2C Definitions + **************************************************************************/ + +/* Write starts with the upper byte of register 0x02 */ +#define WRITE_REG_NUM 8 +#define WRITE_INDEX(i) (i + 0x02) + +/* Read starts with the upper byte of register 0x0a */ +#define READ_REG_NUM RADIO_REGISTER_NUM +#define READ_INDEX(i) ((i + RADIO_REGISTER_NUM - 0x0a) % READ_REG_NUM) + + + +/************************************************************************** + * General Driver Functions - REGISTERs + **************************************************************************/ + +/* + * si470x_get_register - read register + */ +int si470x_get_register(struct si470x_device *radio, int regnr) +{ + u16 buf[READ_REG_NUM]; + struct i2c_msg msgs[1] = { + { radio->client->addr, I2C_M_RD, sizeof(u16) * READ_REG_NUM, + (void *)buf }, + }; + + if (i2c_transfer(radio->client->adapter, msgs, 1) != 1) + return -EIO; + + radio->registers[regnr] = __be16_to_cpu(buf[READ_INDEX(regnr)]); + + return 0; +} + + +/* + * si470x_set_register - write register + */ +int si470x_set_register(struct si470x_device *radio, int regnr) +{ + int i; + u16 buf[WRITE_REG_NUM]; + struct i2c_msg msgs[1] = { + { radio->client->addr, 0, sizeof(u16) * WRITE_REG_NUM, + (void *)buf }, + }; + + for (i = 0; i < WRITE_REG_NUM; i++) + buf[i] = __cpu_to_be16(radio->registers[WRITE_INDEX(i)]); + + if (i2c_transfer(radio->client->adapter, msgs, 1) != 1) + return -EIO; + + return 0; +} + + + +/************************************************************************** + * General Driver Functions - ENTIRE REGISTERS + **************************************************************************/ + +/* + * si470x_get_all_registers - read entire registers + */ +static int si470x_get_all_registers(struct si470x_device *radio) +{ + int i; + u16 buf[READ_REG_NUM]; + struct i2c_msg msgs[1] = { + { radio->client->addr, I2C_M_RD, sizeof(u16) * READ_REG_NUM, + (void *)buf }, + }; + + if (i2c_transfer(radio->client->adapter, msgs, 1) != 1) + return -EIO; + + for (i = 0; i < READ_REG_NUM; i++) + radio->registers[i] = __be16_to_cpu(buf[READ_INDEX(i)]); + + return 0; +} + + + +/************************************************************************** + * General Driver Functions - DISCONNECT_CHECK + **************************************************************************/ + +/* + * si470x_disconnect_check - check whether radio disconnects + */ +int si470x_disconnect_check(struct si470x_device *radio) +{ + return 0; +} + + + +/************************************************************************** + * File Operations Interface + **************************************************************************/ + +/* + * si470x_fops_open - file open + */ +static int si470x_fops_open(struct file *file) +{ + struct si470x_device *radio = video_drvdata(file); + int retval = 0; + + mutex_lock(&radio->lock); + radio->users++; + + if (radio->users == 1) + /* start radio */ + retval = si470x_start(radio); + + mutex_unlock(&radio->lock); + + 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) + return -ENODEV; + + mutex_lock(&radio->lock); + radio->users--; + if (radio->users == 0) + /* stop radio */ + retval = si470x_stop(radio); + + mutex_unlock(&radio->lock); + + return retval; +} + + +/* + * si470x_fops - file operations interface + */ +const struct v4l2_file_operations si470x_fops = { + .owner = THIS_MODULE, + .ioctl = video_ioctl2, + .open = si470x_fops_open, + .release = si470x_fops_release, +}; + + + +/************************************************************************** + * Video4Linux Interface + **************************************************************************/ + +/* + * si470x_vidioc_querycap - query device capabilities + */ +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)); + capability->version = DRIVER_KERNEL_VERSION; + capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | + V4L2_CAP_TUNER | V4L2_CAP_RADIO; + + return 0; +} + + + +/************************************************************************** + * I2C Interface + **************************************************************************/ + +/* + * si470x_i2c_probe - probe for the device + */ +static int __devinit si470x_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct si470x_device *radio; + int retval = 0; + unsigned char version_warning = 0; + + /* private data allocation and initialization */ + radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL); + if (!radio) { + retval = -ENOMEM; + goto err_initial; + } + radio->users = 0; + radio->client = client; + mutex_init(&radio->lock); + + /* video device allocation and initialization */ + radio->videodev = video_device_alloc(); + if (!radio->videodev) { + retval = -ENOMEM; + goto err_radio; + } + memcpy(radio->videodev, &si470x_viddev_template, + sizeof(si470x_viddev_template)); + video_set_drvdata(radio->videodev, radio); + + /* power up : need 110ms */ + radio->registers[POWERCFG] = POWERCFG_ENABLE; + if (si470x_set_register(radio, POWERCFG) < 0) { + retval = -EIO; + goto err_all; + } + msleep(110); + + /* get device and chip versions */ + if (si470x_get_all_registers(radio) < 0) { + retval = -EIO; + goto err_video; + } + dev_info(&client->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n", + radio->registers[DEVICEID], radio->registers[CHIPID]); + if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) { + dev_warn(&client->dev, + "This driver is known to work with " + "firmware version %hu,\n", RADIO_FW_VERSION); + dev_warn(&client->dev, + "but the device has firmware version %hu.\n", + radio->registers[CHIPID] & CHIPID_FIRMWARE); + version_warning = 1; + } + + /* give out version warning */ + if (version_warning == 1) { + dev_warn(&client->dev, + "If you have some trouble using this driver,\n"); + dev_warn(&client->dev, + "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 */ + + /* register video device */ + retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, + radio_nr); + if (retval) { + dev_warn(&client->dev, "Could not register video device\n"); + goto err_all; + } + i2c_set_clientdata(client, radio); + + return 0; +err_all: +err_video: + video_device_release(radio->videodev); +err_radio: + kfree(radio); +err_initial: + return retval; +} + + +/* + * si470x_i2c_remove - remove the device + */ +static __devexit int si470x_i2c_remove(struct i2c_client *client) +{ + struct si470x_device *radio = i2c_get_clientdata(client); + + video_unregister_device(radio->videodev); + kfree(radio); + i2c_set_clientdata(client, NULL); + + return 0; +} + + +/* + * si470x_i2c_driver - i2c driver interface + */ +static struct i2c_driver si470x_i2c_driver = { + .driver = { + .name = "si470x", + .owner = THIS_MODULE, + }, + .probe = si470x_i2c_probe, + .remove = __devexit_p(si470x_i2c_remove), + .id_table = si470x_i2c_id, +}; + + + +/************************************************************************** + * Module Interface + **************************************************************************/ + +/* + * si470x_i2c_init - module init + */ +static int __init si470x_i2c_init(void) +{ + printk(KERN_INFO DRIVER_DESC ", Version " DRIVER_VERSION "\n"); + return i2c_add_driver(&si470x_i2c_driver); +} + + +/* + * si470x_i2c_exit - module exit + */ +static void __exit si470x_i2c_exit(void) +{ + i2c_del_driver(&si470x_i2c_driver); +} + + +module_init(si470x_i2c_init); +module_exit(si470x_i2c_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_VERSION(DRIVER_VERSION); diff --git a/drivers/media/radio/si470x/radio-si470x-usb.c b/drivers/media/radio/si470x/radio-si470x-usb.c new file mode 100644 index 0000000..f2d0e1d --- /dev/null +++ b/drivers/media/radio/si470x/radio-si470x-usb.c @@ -0,0 +1,988 @@ +/* + * drivers/media/radio/si470x/radio-si470x-usb.c + * + * USB driver for radios with Silicon Labs Si470x FM Radio Receivers + * + * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net> + * + * 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 + */ + + +/* + * ToDo: + * - add firmware download/update support + */ + + +/* driver definitions */ +#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>" +#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/usb.h> +#include <linux/hid.h> + +#include "radio-si470x.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"); + +/* USB timeout */ +static unsigned int usb_timeout = 500; +module_param(usb_timeout, uint, 0644); +MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*"); + +/* RDS buffer blocks */ +static unsigned int rds_buf = 100; +module_param(rds_buf, uint, 0444); +MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*"); + +/* RDS maximum block errors */ +static unsigned short max_rds_errors = 1; +/* 0 means 0 errors requiring correction */ +/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */ +/* 2 means 3-5 errors requiring correction */ +/* 3 means 6+ errors or errors in checkword, correction not possible */ +module_param(max_rds_errors, ushort, 0644); +MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*"); + + + +/************************************************************************** + * USB HID Reports + **************************************************************************/ + +/* Reports 1-16 give direct read/write access to the 16 Si470x registers */ +/* with the (REPORT_ID - 1) corresponding to the register address across USB */ +/* endpoint 0 using GET_REPORT and SET_REPORT */ +#define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1) +#define REGISTER_REPORT(reg) ((reg) + 1) + +/* Report 17 gives direct read/write access to the entire Si470x register */ +/* map across endpoint 0 using GET_REPORT and SET_REPORT */ +#define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) +#define ENTIRE_REPORT 17 + +/* Report 18 is used to send the lowest 6 Si470x registers up the HID */ +/* interrupt endpoint 1 to Windows every 20 milliseconds for status */ +#define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) +#define RDS_REPORT 18 + +/* Report 19: LED state */ +#define LED_REPORT_SIZE 3 +#define LED_REPORT 19 + +/* Report 19: stream */ +#define STREAM_REPORT_SIZE 3 +#define STREAM_REPORT 19 + +/* Report 20: scratch */ +#define SCRATCH_PAGE_SIZE 63 +#define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1) +#define SCRATCH_REPORT 20 + +/* Reports 19-22: flash upgrade of the C8051F321 */ +#define WRITE_REPORT_SIZE 4 +#define WRITE_REPORT 19 +#define FLASH_REPORT_SIZE 64 +#define FLASH_REPORT 20 +#define CRC_REPORT_SIZE 3 +#define CRC_REPORT 21 +#define RESPONSE_REPORT_SIZE 2 +#define RESPONSE_REPORT 22 + +/* Report 23: currently unused, but can accept 60 byte reports on the HID */ +/* interrupt out endpoint 2 every 1 millisecond */ +#define UNUSED_REPORT 23 + + + +/************************************************************************** + * Software/Hardware Versions from Scratch Page + **************************************************************************/ +#define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6 +#define RADIO_SW_VERSION 7 +#define RADIO_HW_VERSION 1 + + + +/************************************************************************** + * LED State Definitions + **************************************************************************/ +#define LED_COMMAND 0x35 + +#define NO_CHANGE_LED 0x00 +#define ALL_COLOR_LED 0x01 /* streaming state */ +#define BLINK_GREEN_LED 0x02 /* connect state */ +#define BLINK_RED_LED 0x04 +#define BLINK_ORANGE_LED 0x10 /* disconnect state */ +#define SOLID_GREEN_LED 0x20 /* tuning/seeking state */ +#define SOLID_RED_LED 0x40 /* bootload state */ +#define SOLID_ORANGE_LED 0x80 + + + +/************************************************************************** + * Stream State Definitions + **************************************************************************/ +#define STREAM_COMMAND 0x36 +#define STREAM_VIDPID 0x00 +#define STREAM_AUDIO 0xff + + + +/************************************************************************** + * Bootloader / Flash Commands + **************************************************************************/ + +/* unique id sent to bootloader and required to put into a bootload state */ +#define UNIQUE_BL_ID 0x34 + +/* mask for the flash data */ +#define FLASH_DATA_MASK 0x55 + +/* bootloader commands */ +#define GET_SW_VERSION_COMMAND 0x00 +#define SET_PAGE_COMMAND 0x01 +#define ERASE_PAGE_COMMAND 0x02 +#define WRITE_PAGE_COMMAND 0x03 +#define CRC_ON_PAGE_COMMAND 0x04 +#define READ_FLASH_BYTE_COMMAND 0x05 +#define RESET_DEVICE_COMMAND 0x06 +#define GET_HW_VERSION_COMMAND 0x07 +#define BLANK 0xff + +/* bootloader command responses */ +#define COMMAND_OK 0x01 +#define COMMAND_FAILED 0x02 +#define COMMAND_PENDING 0x03 + + + +/************************************************************************** + * General Driver Functions - REGISTER_REPORTs + **************************************************************************/ + +/* + * si470x_get_report - receive a HID report + */ +static int si470x_get_report(struct si470x_device *radio, void *buf, int size) +{ + unsigned char *report = (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) + dev_warn(&radio->intf->dev, + "si470x_get_report: usb_control_msg returned %d\n", + retval); + return retval; +} + + +/* + * si470x_set_report - send a HID report + */ +static int si470x_set_report(struct si470x_device *radio, void *buf, int size) +{ + unsigned char *report = (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) + dev_warn(&radio->intf->dev, + "si470x_set_report: usb_control_msg returned %d\n", + retval); + return retval; +} + + +/* + * si470x_get_register - read register + */ +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 + */ +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; +} + + + +/************************************************************************** + * 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) + dev_warn(&radio->intf->dev, "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; +} + + + +/************************************************************************** + * General Driver Functions - DISCONNECT_CHECK + **************************************************************************/ + +/* + * si470x_disconnect_check - check whether radio disconnects + */ +int si470x_disconnect_check(struct si470x_device *radio) +{ + if (radio->disconnected) + return -EIO; + else + return 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 { + dev_warn(&radio->intf->dev, + "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) { + dev_warn(&radio->intf->dev, + "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) { + dev_info(&radio->intf->dev, + "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 + */ +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 + */ +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; +} + + + +/************************************************************************** + * 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; + unsigned char version_warning = 0; + + /* private data allocation and initialization */ + radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL); + if (!radio) { + retval = -ENOMEM; + goto err_initial; + } + radio->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) { + dev_info(&intf->dev, "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) { + dev_info(&intf->dev, "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) { + dev_info(&intf->dev, "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); + + /* get device and chip versions */ + if (si470x_get_all_registers(radio) < 0) { + retval = -EIO; + goto err_video; + } + dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n", + radio->registers[DEVICEID], radio->registers[CHIPID]); + if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) { + dev_warn(&intf->dev, + "This driver is known to work with " + "firmware version %hu,\n", RADIO_FW_VERSION); + dev_warn(&intf->dev, + "but the device has firmware version %hu.\n", + radio->registers[CHIPID] & CHIPID_FIRMWARE); + version_warning = 1; + } + + /* get software and hardware versions */ + if (si470x_get_scratch_page_versions(radio) < 0) { + retval = -EIO; + goto err_video; + } + dev_info(&intf->dev, "software version %d, hardware version %d\n", + radio->software_version, radio->hardware_version); + if (radio->software_version < RADIO_SW_VERSION) { + dev_warn(&intf->dev, + "This driver is known to work with " + "software version %hu,\n", RADIO_SW_VERSION); + dev_warn(&intf->dev, + "but the device has software version %hu.\n", + radio->software_version); + version_warning = 1; + } + if (radio->hardware_version < RADIO_HW_VERSION) { + dev_warn(&intf->dev, + "This driver is known to work with " + "hardware version %hu,\n", RADIO_HW_VERSION); + dev_warn(&intf->dev, + "but the device has hardware version %hu.\n", + radio->hardware_version); + version_warning = 1; + } + + /* give out version warning */ + if (version_warning == 1) { + dev_warn(&intf->dev, + "If you have some trouble using this driver,\n"); + dev_warn(&intf->dev, + "please report to V4L ML at " + "linux-media@vger.kernel.org\n"); + } + + /* set 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) { + dev_warn(&intf->dev, "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) +{ + dev_info(&intf->dev, "suspending now...\n"); + + return 0; +} + + +/* + * si470x_usb_driver_resume - resume the device + */ +static int si470x_usb_driver_resume(struct usb_interface *intf) +{ + dev_info(&intf->dev, "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); diff --git a/drivers/media/radio/si470x/radio-si470x.h b/drivers/media/radio/si470x/radio-si470x.h new file mode 100644 index 0000000..d0af194 --- /dev/null +++ b/drivers/media/radio/si470x/radio-si470x.h @@ -0,0 +1,225 @@ +/* + * drivers/media/radio/si470x/radio-si470x.h + * + * Driver for radios with Silicon Labs Si470x FM Radio Receivers + * + * 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 + */ + + +/* driver definitions */ +#define DRIVER_NAME "radio-si470x" + + +/* 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/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> + + + +/************************************************************************** + * 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) */ + + + +/************************************************************************** + * General Driver Definitions + **************************************************************************/ + +/* + * si470x_device - private data + */ +struct si470x_device { + struct video_device *videodev; + + /* driver management */ + unsigned int users; + + /* 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; + +#if defined(CONFIG_USB_SI470X) || defined(CONFIG_USB_SI470X_MODULE) + /* reference to USB and video device */ + struct usb_device *usbdev; + struct usb_interface *intf; + + /* Interrupt endpoint handling */ + char *int_in_buffer; + struct usb_endpoint_descriptor *int_in_endpoint; + struct urb *int_in_urb; + int int_in_running; + + /* scratch page */ + unsigned char software_version; + unsigned char hardware_version; + + /* driver management */ + unsigned char disconnected; + struct mutex disconnect_lock; +#endif + +#if defined(CONFIG_I2C_SI470X) || defined(CONFIG_I2C_SI470X_MODULE) + struct i2c_client *client; +#endif +}; + + + +/************************************************************************** + * Firmware Versions + **************************************************************************/ + +#define RADIO_FW_VERSION 15 + + + +/************************************************************************** + * Frequency Multiplicator + **************************************************************************/ + +/* + * 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) + + + +/************************************************************************** + * Common Functions + **************************************************************************/ +extern const struct v4l2_file_operations si470x_fops; +extern struct video_device si470x_viddev_template; +int si470x_get_register(struct si470x_device *radio, int regnr); +int si470x_set_register(struct si470x_device *radio, int regnr); +int si470x_disconnect_check(struct si470x_device *radio); +int si470x_set_freq(struct si470x_device *radio, unsigned int freq); +int si470x_start(struct si470x_device *radio); +int si470x_stop(struct si470x_device *radio); +int si470x_rds_on(struct si470x_device *radio); +int si470x_vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *capability); |