diff options
author | Hans de Goede <hdegoede@redhat.com> | 2012-08-10 15:49:59 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-09-13 17:42:10 -0300 |
commit | d7aab0bf9dbd658c25e815aa034042aed6801f3e (patch) | |
tree | b313d4eef4973ca28a3673ca367c6ef7c0cc82da /drivers/media/radio/radio-tea5777.c | |
parent | 4fad5c474f9078dd133996cabaffdb5df8a1e28e (diff) | |
download | op-kernel-dev-d7aab0bf9dbd658c25e815aa034042aed6801f3e.zip op-kernel-dev-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.c | 188 |
1 files changed, 149 insertions, 39 deletions
diff --git a/drivers/media/radio/radio-tea5777.c b/drivers/media/radio/radio-tea5777.c index 8cfa364..818e57c 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); |