From eae63ae007fd72d5040d6749339d68fbfd99d8c7 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 4 May 2012 09:20:53 -0300 Subject: [PATCH] [media] si470x: add control event support and more v4l2 compliancy fixes Signed-off-by: Hans Verkuil Acked-by: Tobias Lorenz Signed-off-by: Mauro Carvalho Chehab --- drivers/media/radio/si470x/radio-si470x-common.c | 45 +++++++++++++++--------- 1 file changed, 28 insertions(+), 17 deletions(-) diff --git a/drivers/media/radio/si470x/radio-si470x-common.c b/drivers/media/radio/si470x/radio-si470x-common.c index de9475f..e70badf 100644 --- a/drivers/media/radio/si470x/radio-si470x-common.c +++ b/drivers/media/radio/si470x/radio-si470x-common.c @@ -262,7 +262,7 @@ 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; + unsigned int spacing, band_bottom, band_top; unsigned short chan; /* Spacing (kHz) */ @@ -278,19 +278,26 @@ int si470x_set_freq(struct si470x_device *radio, unsigned int freq) spacing = 0.050 * FREQ_MUL; break; }; - /* Bottom of Band (MHz) */ + /* 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; break; + 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; break; + band_bottom = 76 * FREQ_MUL; + band_top = 108 * FREQ_MUL; + break; /* 2: 76 - 90 MHz (Japan) */ case 2: - band_bottom = 76 * FREQ_MUL; break; + band_bottom = 76 * FREQ_MUL; + band_top = 90 * FREQ_MUL; + break; }; + freq = clamp(freq, band_bottom, band_top); /* Chan = [ Freq (Mhz) - Bottom of Band (MHz) ] / Spacing (kHz) */ chan = (freq - band_bottom) / spacing; @@ -515,17 +522,19 @@ 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 */ + unsigned long req_events = poll_requested_events(pts); + int retval = v4l2_ctrl_poll(file, pts); - if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) - si470x_rds_on(radio); + if (req_events & (POLLIN | POLLRDNORM)) { + /* switch on rds reception */ + if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) + si470x_rds_on(radio); - poll_wait(file, &radio->read_queue, pts); + poll_wait(file, &radio->read_queue, pts); - if (radio->rd_index != radio->wr_index) - retval = POLLIN | POLLRDNORM; + if (radio->rd_index != radio->wr_index) + retval |= POLLIN | POLLRDNORM; + } return retval; } @@ -637,6 +646,8 @@ static int si470x_vidioc_g_tuner(struct file *file, void *priv, tuner->signal = (radio->registers[STATUSRSSI] & STATUSRSSI_RSSI); /* the ideal factor is 0xffff/75 = 873,8 */ tuner->signal = (tuner->signal * 873) + (8 * tuner->signal / 10); + if (tuner->signal > 0xffff) + tuner->signal = 0xffff; /* automatic frequency control: -1: freq to low, 1 freq to high */ /* AFCRL does only indicate that freq. differs, not if too low/high */ @@ -660,7 +671,7 @@ static int si470x_vidioc_s_tuner(struct file *file, void *priv, int retval = 0; if (tuner->index != 0) - goto done; + return -EINVAL; /* mono/stereo selector */ switch (tuner->audmode) { @@ -668,15 +679,13 @@ static int si470x_vidioc_s_tuner(struct file *file, void *priv, radio->registers[POWERCFG] |= POWERCFG_MONO; /* force mono */ break; case V4L2_TUNER_MODE_STEREO: + default: 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); @@ -770,6 +779,8 @@ 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_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, }; -- 2.7.4