diff options
| -rw-r--r-- | drivers/media/radio/si470x/radio-si470x-common.c | 215 | ||||
| -rw-r--r-- | drivers/media/radio/si470x/radio-si470x-i2c.c | 1 | ||||
| -rw-r--r-- | drivers/media/radio/si470x/radio-si470x-usb.c | 1 | ||||
| -rw-r--r-- | drivers/media/radio/si470x/radio-si470x.h | 1 |
4 files changed, 126 insertions, 92 deletions
diff --git a/drivers/media/radio/si470x/radio-si470x-common.c b/drivers/media/radio/si470x/radio-si470x-common.c index 84ab3d57..9e38132 100644 --- a/drivers/media/radio/si470x/radio-si470x-common.c +++ b/drivers/media/radio/si470x/radio-si470x-common.c @@ -4,6 +4,7 @@ * Driver for radios with Silicon Labs Si470x FM Radio Receivers * * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net> + * Copyright (c) 2012 Hans de Goede <hdegoede@redhat.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 @@ -127,14 +128,6 @@ 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) */ @@ -152,13 +145,61 @@ static unsigned int seek_timeout = 5000; module_param(seek_timeout, uint, 0644); MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*"); - +static const struct v4l2_frequency_band bands[] = { + { + .type = V4L2_TUNER_RADIO, + .index = 0, + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | + V4L2_TUNER_CAP_HWSEEK_WRAP, + .rangelow = 87500 * 16, + .rangehigh = 108000 * 16, + .modulation = V4L2_BAND_MODULATION_FM, + }, + { + .type = V4L2_TUNER_RADIO, + .index = 1, + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | + V4L2_TUNER_CAP_HWSEEK_WRAP, + .rangelow = 76000 * 16, + .rangehigh = 108000 * 16, + .modulation = V4L2_BAND_MODULATION_FM, + }, + { + .type = V4L2_TUNER_RADIO, + .index = 2, + .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | + V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO | + V4L2_TUNER_CAP_HWSEEK_BOUNDED | + V4L2_TUNER_CAP_HWSEEK_WRAP, + .rangelow = 76000 * 16, + .rangehigh = 90000 * 16, + .modulation = V4L2_BAND_MODULATION_FM, + }, +}; /************************************************************************** * Generic Functions **************************************************************************/ /* + * si470x_set_band - set the band + */ +static int si470x_set_band(struct si470x_device *radio, int band) +{ + if (radio->band == band) + return 0; + + radio->band = band; + radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_BAND; + radio->registers[SYSCONFIG2] |= radio->band << 6; + return si470x_set_register(radio, SYSCONFIG2); +} + +/* * si470x_set_chan - set the channel */ static int si470x_set_chan(struct si470x_device *radio, unsigned short chan) @@ -194,48 +235,39 @@ done: return retval; } - /* - * si470x_get_freq - get the frequency + * si470x_get_step - get channel spacing */ -static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq) +static unsigned int si470x_get_step(struct si470x_device *radio) { - 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; + return 200 * 16; /* 1: 100 kHz (Europe, Japan) */ case 1: - spacing = 0.100 * FREQ_MUL; break; + return 100 * 16; /* 2: 50 kHz */ default: - spacing = 0.050 * FREQ_MUL; break; + return 50 * 16; }; +} - /* 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; - }; + +/* + * si470x_get_freq - get the frequency + */ +static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq) +{ + int chan, retval; /* 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; + *freq = chan * si470x_get_step(radio) + bands[radio->band].rangelow; return retval; } @@ -246,44 +278,12 @@ static int si470x_get_freq(struct si470x_device *radio, unsigned int *freq) */ int si470x_set_freq(struct si470x_device *radio, unsigned int freq) { - unsigned int spacing, band_bottom, band_top; 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/Top 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; - band_top = 108 * FREQ_MUL; - break; - /* 1: 76 - 108 MHz (Japan wide band) */ - default: - band_bottom = 76 * FREQ_MUL; - band_top = 108 * FREQ_MUL; - break; - /* 2: 76 - 90 MHz (Japan) */ - case 2: - band_bottom = 76 * FREQ_MUL; - band_top = 90 * FREQ_MUL; - break; - }; - - freq = clamp(freq, band_bottom, band_top); + freq = clamp(freq, bands[radio->band].rangelow, + bands[radio->band].rangehigh); /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */ - chan = (freq - band_bottom) / spacing; + chan = (freq - bands[radio->band].rangelow) / si470x_get_step(radio); return si470x_set_chan(radio, chan); } @@ -293,18 +293,43 @@ int si470x_set_freq(struct si470x_device *radio, unsigned int freq) * si470x_set_seek - set seek */ static int si470x_set_seek(struct si470x_device *radio, - unsigned int wrap_around, unsigned int seek_upward) + struct v4l2_hw_freq_seek *seek) { - int retval = 0; + int band, retval; + unsigned int freq; bool timed_out = 0; + /* set band */ + if (seek->rangelow || seek->rangehigh) { + for (band = 0; band < ARRAY_SIZE(bands); band++) { + if (bands[band].rangelow == seek->rangelow && + bands[band].rangehigh == seek->rangehigh) + break; + } + if (band == ARRAY_SIZE(bands)) + return -EINVAL; /* No matching band found */ + } else + band = 1; /* If nothing is specified seek 76 - 108 Mhz */ + + if (radio->band != band) { + retval = si470x_get_freq(radio, &freq); + if (retval) + return retval; + retval = si470x_set_band(radio, band); + if (retval) + return retval; + retval = si470x_set_freq(radio, freq); + if (retval) + return retval; + } + /* start seeking */ radio->registers[POWERCFG] |= POWERCFG_SEEK; - if (wrap_around == 1) + if (seek->wrap_around) radio->registers[POWERCFG] &= ~POWERCFG_SKMODE; else radio->registers[POWERCFG] |= POWERCFG_SKMODE; - if (seek_upward == 1) + if (seek->seek_upward) radio->registers[POWERCFG] |= POWERCFG_SEEKUP; else radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP; @@ -360,7 +385,7 @@ int si470x_start(struct si470x_device *radio) /* sysconfig 2 */ radio->registers[SYSCONFIG2] = (0x1f << 8) | /* SEEKTH */ - ((band << 6) & SYSCONFIG2_BAND) | /* BAND */ + ((radio->band << 6) & SYSCONFIG2_BAND) |/* BAND */ ((space << 4) & SYSCONFIG2_SPACE) | /* SPACE */ 15; /* VOLUME (max) */ retval = si470x_set_register(radio, SYSCONFIG2); @@ -569,25 +594,8 @@ static int si470x_vidioc_g_tuner(struct file *file, void *priv, V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO | V4L2_TUNER_CAP_HWSEEK_BOUNDED | V4L2_TUNER_CAP_HWSEEK_WRAP; - - /* 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; - }; + tuner->rangelow = 76 * FREQ_MUL; + tuner->rangehigh = 108 * FREQ_MUL; /* stereo indicator == stereo (instead of mono) */ if ((radio->registers[STATUSRSSI] & STATUSRSSI_ST) == 0) @@ -670,10 +678,18 @@ static int si470x_vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *freq) { struct si470x_device *radio = video_drvdata(file); + int retval; if (freq->tuner != 0) return -EINVAL; + if (freq->frequency < bands[radio->band].rangelow || + freq->frequency > bands[radio->band].rangehigh) { + /* Switch to band 1 which covers everything we support */ + retval = si470x_set_band(radio, 1); + if (retval) + return retval; + } return si470x_set_freq(radio, freq->frequency); } @@ -689,7 +705,21 @@ static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv, if (seek->tuner != 0) return -EINVAL; - return si470x_set_seek(radio, seek->wrap_around, seek->seek_upward); + return si470x_set_seek(radio, seek); +} + +/* + * si470x_vidioc_enum_freq_bands - enumerate supported bands + */ +static int si470x_vidioc_enum_freq_bands(struct file *file, void *priv, + struct v4l2_frequency_band *band) +{ + if (band->tuner != 0) + return -EINVAL; + if (band->index >= ARRAY_SIZE(bands)) + return -EINVAL; + *band = bands[band->index]; + return 0; } const struct v4l2_ctrl_ops si470x_ctrl_ops = { @@ -706,6 +736,7 @@ static const struct v4l2_ioctl_ops si470x_ioctl_ops = { .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, + .vidioc_enum_freq_bands = si470x_vidioc_enum_freq_bands, .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, .vidioc_unsubscribe_event = v4l2_event_unsubscribe, }; diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c index fb401a2..643a6ff 100644 --- a/drivers/media/radio/si470x/radio-si470x-i2c.c +++ b/drivers/media/radio/si470x/radio-si470x-i2c.c @@ -350,6 +350,7 @@ static int __devinit si470x_i2c_probe(struct i2c_client *client, } radio->client = client; + radio->band = 1; /* Default to 76 - 108 MHz */ mutex_init(&radio->lock); init_completion(&radio->completion); diff --git a/drivers/media/radio/si470x/radio-si470x-usb.c b/drivers/media/radio/si470x/radio-si470x-usb.c index 0204cf4..146be42 100644 --- a/drivers/media/radio/si470x/radio-si470x-usb.c +++ b/drivers/media/radio/si470x/radio-si470x-usb.c @@ -597,6 +597,7 @@ static int si470x_usb_driver_probe(struct usb_interface *intf, } radio->usbdev = interface_to_usbdev(intf); radio->intf = intf; + radio->band = 1; /* Default to 76 - 108 MHz */ mutex_init(&radio->lock); init_completion(&radio->completion); diff --git a/drivers/media/radio/si470x/radio-si470x.h b/drivers/media/radio/si470x/radio-si470x.h index b3586e1..2f089b4 100644 --- a/drivers/media/radio/si470x/radio-si470x.h +++ b/drivers/media/radio/si470x/radio-si470x.h @@ -147,6 +147,7 @@ struct si470x_device { struct v4l2_device v4l2_dev; struct video_device videodev; struct v4l2_ctrl_handler hdl; + int band; /* Silabs internal registers (0..15) */ unsigned short registers[RADIO_REGISTER_NUM]; |
