[media] radio-si470x: Add support for the new band APIs
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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 @@
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 @@
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 @@
return retval;
}
+/*
+ * si470x_get_step - get channel spacing
+ */
+static unsigned int si470x_get_step(struct si470x_device *radio)
+{
+ /* Spacing (kHz) */
+ switch ((radio->registers[SYSCONFIG2] & SYSCONFIG2_SPACE) >> 4) {
+ /* 0: 200 kHz (USA, Australia) */
+ case 0:
+ return 200 * 16;
+ /* 1: 100 kHz (Europe, Japan) */
+ case 1:
+ return 100 * 16;
+ /* 2: 50 kHz */
+ default:
+ return 50 * 16;
+ };
+}
+
/*
* 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;
- };
+ 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 @@
*/
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 @@
* 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 @@
/* 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 @@
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 @@
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 @@
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 @@
.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,
};