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authorHans de Goede <hdegoede@redhat.com>2012-08-10 15:49:59 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-09-13 17:42:10 -0300
commitd7aab0bf9dbd658c25e815aa034042aed6801f3e (patch)
treeb313d4eef4973ca28a3673ca367c6ef7c0cc82da /drivers/media/radio/radio-tea5777.c
parent4fad5c474f9078dd133996cabaffdb5df8a1e28e (diff)
downloadlinux-linaro-stable-d7aab0bf9dbd658c25e815aa034042aed6801f3e.tar.gz
[media] radio-tea5777: Add support for tuning AM
This completes my work on the Griffin radioSHARK2 driver, let me use this opportunity to thank Hisaaki Shibata for his generous donation of a Griffin radioSHARK2 to me, which has made this driver possible. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/radio/radio-tea5777.c')
-rw-r--r--drivers/media/radio/radio-tea5777.c188
1 files changed, 149 insertions, 39 deletions
diff --git a/drivers/media/radio/radio-tea5777.c b/drivers/media/radio/radio-tea5777.c
index 8cfa364b8190..818e57c20086 100644
--- a/drivers/media/radio/radio-tea5777.c
+++ b/drivers/media/radio/radio-tea5777.c
@@ -39,13 +39,11 @@ MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");
MODULE_LICENSE("GPL");
-/* Fixed FM only band for now, will implement multi-band support when the
- VIDIOC_ENUM_FREQ_BANDS API is upstream */
-#define TEA5777_FM_RANGELOW (76000 * 16)
-#define TEA5777_FM_RANGEHIGH (108000 * 16)
-
#define TEA5777_FM_IF 150 /* kHz */
-#define TEA5777_FM_FREQ_STEP 50 /* kHz */
+#define TEA5777_FM_FREQ_STEP 50 /* kHz */
+
+#define TEA5777_AM_IF 21 /* kHz */
+#define TEA5777_AM_FREQ_STEP 1 /* kHz */
/* Write reg, common bits */
#define TEA5777_W_MUTE_MASK (1LL << 47)
@@ -94,7 +92,7 @@ MODULE_LICENSE("GPL");
#define TEA5777_W_FM_PLL_SHIFT 32
#define TEA5777_W_FM_FREF_MASK (0x03LL << 30)
#define TEA5777_W_FM_FREF_SHIFT 30
-#define TEA5777_W_FM_FREF_VALUE 0 /* 50 kHz tune steps, 150 kHz IF */
+#define TEA5777_W_FM_FREF_VALUE 0LL /* 50k steps, 150k IF */
#define TEA5777_W_FM_FORCEMONO_MASK (1LL << 15)
#define TEA5777_W_FM_FORCEMONO_SHIFT 15
@@ -115,6 +113,8 @@ MODULE_LICENSE("GPL");
#define TEA5777_W_AM_AGCIF_SHIFT 32
#define TEA5777_W_AM_MWLW_MASK (1LL << 31)
#define TEA5777_W_AM_MWLW_SHIFT 31
+#define TEA5777_W_AM_LW 0LL
+#define TEA5777_W_AM_MW 1LL
#define TEA5777_W_AM_LNA_MASK (1LL << 30)
#define TEA5777_W_AM_LNA_SHIFT 30
@@ -147,9 +147,41 @@ MODULE_LICENSE("GPL");
#define TEA5777_R_FM_PLL_MASK 0x1fff
#define TEA5777_R_FM_PLL_SHIFT 0
+enum { BAND_FM, BAND_AM };
+
+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_FREQ_BANDS |
+ V4L2_TUNER_CAP_HWSEEK_BOUNDED |
+ V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
+ .rangelow = 76000 * 16,
+ .rangehigh = 108000 * 16,
+ .modulation = V4L2_BAND_MODULATION_FM,
+ },
+ {
+ .type = V4L2_TUNER_RADIO,
+ .index = 1,
+ .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS |
+ V4L2_TUNER_CAP_HWSEEK_BOUNDED |
+ V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
+ .rangelow = 530 * 16,
+ .rangehigh = 1710 * 16,
+ .modulation = V4L2_BAND_MODULATION_AM,
+ },
+};
+
static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
{
- return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
+ switch (tea->band) {
+ case BAND_FM:
+ return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
+ case BAND_AM:
+ return (freq * TEA5777_AM_FREQ_STEP + TEA5777_AM_IF) * 16;
+ }
+ return 0; /* Never reached */
}
static int radio_tea5777_set_freq(struct radio_tea5777 *tea)
@@ -157,15 +189,40 @@ static int radio_tea5777_set_freq(struct radio_tea5777 *tea)
u32 freq;
int res;
- freq = clamp_t(u32, tea->freq,
- TEA5777_FM_RANGELOW, TEA5777_FM_RANGEHIGH);
+ freq = clamp(tea->freq, bands[tea->band].rangelow,
+ bands[tea->band].rangehigh);
freq = (freq + 8) / 16; /* to kHz */
- freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
-
- tea->write_reg &= ~(TEA5777_W_FM_PLL_MASK | TEA5777_W_FM_FREF_MASK);
- tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
- tea->write_reg |= TEA5777_W_FM_FREF_VALUE << TEA5777_W_FM_FREF_SHIFT;
+ switch (tea->band) {
+ case BAND_FM:
+ tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
+ freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
+ tea->write_reg &= ~TEA5777_W_FM_PLL_MASK;
+ tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
+ tea->write_reg &= ~TEA5777_W_FM_FREF_MASK;
+ tea->write_reg |= TEA5777_W_FM_FREF_VALUE <<
+ TEA5777_W_FM_FREF_SHIFT;
+ tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
+ if (tea->audmode == V4L2_TUNER_MODE_MONO)
+ tea->write_reg |= 1LL << TEA5777_W_FM_FORCEMONO_SHIFT;
+ break;
+ case BAND_AM:
+ tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
+ tea->write_reg |= (1LL << TEA5777_W_AM_FM_SHIFT);
+ freq = (freq - TEA5777_AM_IF) / TEA5777_AM_FREQ_STEP;
+ tea->write_reg &= ~TEA5777_W_AM_PLL_MASK;
+ tea->write_reg |= (u64)freq << TEA5777_W_AM_PLL_SHIFT;
+ tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
+ tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
+ tea->write_reg &= ~TEA5777_W_AM_MWLW_MASK;
+ tea->write_reg |= TEA5777_W_AM_MW << TEA5777_W_AM_MWLW_SHIFT;
+ tea->write_reg &= ~TEA5777_W_AM_LNA_MASK;
+ tea->write_reg |= 1LL << TEA5777_W_AM_LNA_SHIFT;
+ tea->write_reg &= ~TEA5777_W_AM_PEAK_MASK;
+ tea->write_reg |= 1LL << TEA5777_W_AM_PEAK_SHIFT;
+ tea->write_reg &= ~TEA5777_W_AM_CALLIGN_MASK;
+ break;
+ }
res = tea->ops->write_reg(tea, tea->write_reg);
if (res)
@@ -223,6 +280,19 @@ static int vidioc_querycap(struct file *file, void *priv,
return 0;
}
+static int vidioc_enum_freq_bands(struct file *file, void *priv,
+ struct v4l2_frequency_band *band)
+{
+ struct radio_tea5777 *tea = video_drvdata(file);
+
+ if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) ||
+ (!tea->has_am && band->index == BAND_AM))
+ return -EINVAL;
+
+ *band = bands[band->index];
+ return 0;
+}
+
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
@@ -243,13 +313,18 @@ static int vidioc_g_tuner(struct file *file, void *priv,
strlcpy(v->name, "FM", sizeof(v->name));
v->type = V4L2_TUNER_RADIO;
v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
- V4L2_TUNER_CAP_HWSEEK_BOUNDED;
- v->rangelow = TEA5777_FM_RANGELOW;
- v->rangehigh = TEA5777_FM_RANGEHIGH;
- v->rxsubchans = (tea->read_reg & TEA5777_R_FM_STEREO_MASK) ?
- V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
- v->audmode = (tea->write_reg & TEA5777_W_FM_FORCEMONO_MASK) ?
- V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
+ V4L2_TUNER_CAP_FREQ_BANDS |
+ V4L2_TUNER_CAP_HWSEEK_BOUNDED |
+ V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
+ v->rangelow = tea->has_am ? bands[BAND_AM].rangelow :
+ bands[BAND_FM].rangelow;
+ v->rangehigh = bands[BAND_FM].rangehigh;
+ if (tea->band == BAND_FM &&
+ (tea->read_reg & TEA5777_R_FM_STEREO_MASK))
+ v->rxsubchans = V4L2_TUNER_SUB_STEREO;
+ else
+ v->rxsubchans = V4L2_TUNER_SUB_MONO;
+ v->audmode = tea->audmode;
/* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
(TEA5777_R_LEVEL_SHIFT - 12);
@@ -264,16 +339,20 @@ static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct radio_tea5777 *tea = video_drvdata(file);
+ u32 orig_audmode = tea->audmode;
if (v->index)
return -EINVAL;
- if (v->audmode == V4L2_TUNER_MODE_MONO)
- tea->write_reg |= TEA5777_W_FM_FORCEMONO_MASK;
- else
- tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
+ if (v->audmode > V4L2_TUNER_MODE_STEREO)
+ v->audmode = V4L2_TUNER_MODE_STEREO;
- return radio_tea5777_set_freq(tea);
+ tea->audmode = v->audmode;
+
+ if (tea->audmode != orig_audmode && tea->band == BAND_FM)
+ return radio_tea5777_set_freq(tea);
+
+ return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
@@ -296,6 +375,11 @@ static int vidioc_s_frequency(struct file *file, void *priv,
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
return -EINVAL;
+ if (tea->has_am && f->frequency < (20000 * 16))
+ tea->band = BAND_AM;
+ else
+ tea->band = BAND_FM;
+
tea->freq = f->frequency;
return radio_tea5777_set_freq(tea);
}
@@ -304,32 +388,56 @@ static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
struct v4l2_hw_freq_seek *a)
{
struct radio_tea5777 *tea = video_drvdata(file);
- u32 orig_freq = tea->freq;
unsigned long timeout;
- int res, spacing = 200 * 16; /* 200 kHz */
- /* These are fixed *for now* */
- const u32 seek_rangelow = TEA5777_FM_RANGELOW;
- const u32 seek_rangehigh = TEA5777_FM_RANGEHIGH;
+ int i, res, spacing;
+ u32 orig_freq;
if (a->tuner || a->wrap_around)
return -EINVAL;
+ if (a->rangelow || a->rangehigh) {
+ for (i = 0; i < ARRAY_SIZE(bands); i++) {
+ if (i == BAND_AM && !tea->has_am)
+ continue;
+ if (bands[i].rangelow >= a->rangelow &&
+ bands[i].rangehigh <= a->rangehigh)
+ break;
+ }
+ if (i == ARRAY_SIZE(bands))
+ return -EINVAL; /* No matching band found */
+
+ tea->band = i;
+ if (tea->freq < a->rangelow || tea->freq > a->rangehigh) {
+ tea->freq = clamp(tea->freq, a->rangelow,
+ a->rangehigh);
+ res = radio_tea5777_set_freq(tea);
+ if (res)
+ return res;
+ }
+ } else {
+ a->rangelow = bands[tea->band].rangelow;
+ a->rangehigh = bands[tea->band].rangehigh;
+ }
+
+ spacing = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
+ orig_freq = tea->freq;
+
tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
- if (seek_rangelow != tea->seek_rangelow) {
+ if (tea->seek_rangelow != a->rangelow) {
tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
- tea->freq = seek_rangelow;
+ tea->freq = a->rangelow;
res = radio_tea5777_set_freq(tea);
if (res)
goto leave;
- tea->seek_rangelow = tea->freq;
+ tea->seek_rangelow = a->rangelow;
}
- if (seek_rangehigh != tea->seek_rangehigh) {
+ if (tea->seek_rangehigh != a->rangehigh) {
tea->write_reg |= TEA5777_W_UPDWN_MASK;
- tea->freq = seek_rangehigh;
+ tea->freq = a->rangehigh;
res = radio_tea5777_set_freq(tea);
if (res)
goto leave;
- tea->seek_rangehigh = tea->freq;
+ tea->seek_rangehigh = a->rangehigh;
}
tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
@@ -417,6 +525,7 @@ static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
.vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
+ .vidioc_enum_freq_bands = vidioc_enum_freq_bands,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
@@ -439,8 +548,9 @@ int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
(1LL << TEA5777_W_IFW_SHIFT) |
(1LL << TEA5777_W_INTEXT_SHIFT) |
(1LL << TEA5777_W_CHP0_SHIFT) |
- (2LL << TEA5777_W_SLEV_SHIFT);
+ (1LL << TEA5777_W_SLEV_SHIFT);
tea->freq = 90500 * 16; /* 90.5Mhz default */
+ tea->audmode = V4L2_TUNER_MODE_STEREO;
res = radio_tea5777_set_freq(tea);
if (res) {
v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);