forked from Minki/linux
[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>
This commit is contained in:
Hans de Goede
Mauro Carvalho Chehab
parent
4fad5c474f
commit
d7aab0bf9d
@ -39,13 +39,11 @@ MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
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MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");
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MODULE_LICENSE("GPL");
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/* Fixed FM only band for now, will implement multi-band support when the
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VIDIOC_ENUM_FREQ_BANDS API is upstream */
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#define TEA5777_FM_RANGELOW (76000 * 16)
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#define TEA5777_FM_RANGEHIGH (108000 * 16)
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#define TEA5777_FM_IF 150 /* kHz */
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#define TEA5777_FM_FREQ_STEP 50 /* kHz */
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#define TEA5777_FM_FREQ_STEP 50 /* kHz */
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#define TEA5777_AM_IF 21 /* kHz */
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#define TEA5777_AM_FREQ_STEP 1 /* kHz */
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/* Write reg, common bits */
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#define TEA5777_W_MUTE_MASK (1LL << 47)
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@ -94,7 +92,7 @@ MODULE_LICENSE("GPL");
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#define TEA5777_W_FM_PLL_SHIFT 32
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#define TEA5777_W_FM_FREF_MASK (0x03LL << 30)
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#define TEA5777_W_FM_FREF_SHIFT 30
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#define TEA5777_W_FM_FREF_VALUE 0 /* 50 kHz tune steps, 150 kHz IF */
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#define TEA5777_W_FM_FREF_VALUE 0LL /* 50k steps, 150k IF */
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#define TEA5777_W_FM_FORCEMONO_MASK (1LL << 15)
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#define TEA5777_W_FM_FORCEMONO_SHIFT 15
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@ -115,6 +113,8 @@ MODULE_LICENSE("GPL");
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#define TEA5777_W_AM_AGCIF_SHIFT 32
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#define TEA5777_W_AM_MWLW_MASK (1LL << 31)
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#define TEA5777_W_AM_MWLW_SHIFT 31
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#define TEA5777_W_AM_LW 0LL
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#define TEA5777_W_AM_MW 1LL
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#define TEA5777_W_AM_LNA_MASK (1LL << 30)
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#define TEA5777_W_AM_LNA_SHIFT 30
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@ -147,9 +147,41 @@ MODULE_LICENSE("GPL");
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#define TEA5777_R_FM_PLL_MASK 0x1fff
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#define TEA5777_R_FM_PLL_SHIFT 0
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enum { BAND_FM, BAND_AM };
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static const struct v4l2_frequency_band bands[] = {
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{
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.type = V4L2_TUNER_RADIO,
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.index = 0,
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.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
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V4L2_TUNER_CAP_FREQ_BANDS |
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V4L2_TUNER_CAP_HWSEEK_BOUNDED |
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V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
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.rangelow = 76000 * 16,
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.rangehigh = 108000 * 16,
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.modulation = V4L2_BAND_MODULATION_FM,
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},
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{
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.type = V4L2_TUNER_RADIO,
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.index = 1,
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.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS |
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V4L2_TUNER_CAP_HWSEEK_BOUNDED |
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V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
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.rangelow = 530 * 16,
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.rangehigh = 1710 * 16,
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.modulation = V4L2_BAND_MODULATION_AM,
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},
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};
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static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
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{
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return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
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switch (tea->band) {
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case BAND_FM:
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return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
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case BAND_AM:
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return (freq * TEA5777_AM_FREQ_STEP + TEA5777_AM_IF) * 16;
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}
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return 0; /* Never reached */
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}
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static int radio_tea5777_set_freq(struct radio_tea5777 *tea)
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@ -157,15 +189,40 @@ static int radio_tea5777_set_freq(struct radio_tea5777 *tea)
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u32 freq;
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int res;
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freq = clamp_t(u32, tea->freq,
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TEA5777_FM_RANGELOW, TEA5777_FM_RANGEHIGH);
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freq = clamp(tea->freq, bands[tea->band].rangelow,
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bands[tea->band].rangehigh);
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freq = (freq + 8) / 16; /* to kHz */
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freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
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tea->write_reg &= ~(TEA5777_W_FM_PLL_MASK | TEA5777_W_FM_FREF_MASK);
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tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
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tea->write_reg |= TEA5777_W_FM_FREF_VALUE << TEA5777_W_FM_FREF_SHIFT;
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switch (tea->band) {
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case BAND_FM:
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tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
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freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
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tea->write_reg &= ~TEA5777_W_FM_PLL_MASK;
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tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
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tea->write_reg &= ~TEA5777_W_FM_FREF_MASK;
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tea->write_reg |= TEA5777_W_FM_FREF_VALUE <<
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TEA5777_W_FM_FREF_SHIFT;
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tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
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if (tea->audmode == V4L2_TUNER_MODE_MONO)
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tea->write_reg |= 1LL << TEA5777_W_FM_FORCEMONO_SHIFT;
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break;
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case BAND_AM:
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tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
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tea->write_reg |= (1LL << TEA5777_W_AM_FM_SHIFT);
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freq = (freq - TEA5777_AM_IF) / TEA5777_AM_FREQ_STEP;
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tea->write_reg &= ~TEA5777_W_AM_PLL_MASK;
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tea->write_reg |= (u64)freq << TEA5777_W_AM_PLL_SHIFT;
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tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
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tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
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tea->write_reg &= ~TEA5777_W_AM_MWLW_MASK;
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tea->write_reg |= TEA5777_W_AM_MW << TEA5777_W_AM_MWLW_SHIFT;
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tea->write_reg &= ~TEA5777_W_AM_LNA_MASK;
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tea->write_reg |= 1LL << TEA5777_W_AM_LNA_SHIFT;
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tea->write_reg &= ~TEA5777_W_AM_PEAK_MASK;
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tea->write_reg |= 1LL << TEA5777_W_AM_PEAK_SHIFT;
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tea->write_reg &= ~TEA5777_W_AM_CALLIGN_MASK;
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break;
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}
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res = tea->ops->write_reg(tea, tea->write_reg);
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if (res)
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@ -223,6 +280,19 @@ static int vidioc_querycap(struct file *file, void *priv,
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return 0;
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}
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static int vidioc_enum_freq_bands(struct file *file, void *priv,
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struct v4l2_frequency_band *band)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) ||
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(!tea->has_am && band->index == BAND_AM))
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return -EINVAL;
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*band = bands[band->index];
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return 0;
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}
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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@ -243,13 +313,18 @@ static int vidioc_g_tuner(struct file *file, void *priv,
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strlcpy(v->name, "FM", sizeof(v->name));
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v->type = V4L2_TUNER_RADIO;
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v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
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V4L2_TUNER_CAP_HWSEEK_BOUNDED;
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v->rangelow = TEA5777_FM_RANGELOW;
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v->rangehigh = TEA5777_FM_RANGEHIGH;
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v->rxsubchans = (tea->read_reg & TEA5777_R_FM_STEREO_MASK) ?
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V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
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v->audmode = (tea->write_reg & TEA5777_W_FM_FORCEMONO_MASK) ?
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V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO;
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V4L2_TUNER_CAP_FREQ_BANDS |
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V4L2_TUNER_CAP_HWSEEK_BOUNDED |
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V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
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v->rangelow = tea->has_am ? bands[BAND_AM].rangelow :
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bands[BAND_FM].rangelow;
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v->rangehigh = bands[BAND_FM].rangehigh;
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if (tea->band == BAND_FM &&
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(tea->read_reg & TEA5777_R_FM_STEREO_MASK))
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v->rxsubchans = V4L2_TUNER_SUB_STEREO;
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else
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v->rxsubchans = V4L2_TUNER_SUB_MONO;
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v->audmode = tea->audmode;
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/* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
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v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
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(TEA5777_R_LEVEL_SHIFT - 12);
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@ -264,16 +339,20 @@ static int vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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u32 orig_audmode = tea->audmode;
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if (v->index)
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return -EINVAL;
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if (v->audmode == V4L2_TUNER_MODE_MONO)
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tea->write_reg |= TEA5777_W_FM_FORCEMONO_MASK;
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else
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tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
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if (v->audmode > V4L2_TUNER_MODE_STEREO)
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v->audmode = V4L2_TUNER_MODE_STEREO;
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return radio_tea5777_set_freq(tea);
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tea->audmode = v->audmode;
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if (tea->audmode != orig_audmode && tea->band == BAND_FM)
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return radio_tea5777_set_freq(tea);
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return 0;
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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@ -296,6 +375,11 @@ static int vidioc_s_frequency(struct file *file, void *priv,
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if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
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return -EINVAL;
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if (tea->has_am && f->frequency < (20000 * 16))
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tea->band = BAND_AM;
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else
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tea->band = BAND_FM;
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tea->freq = f->frequency;
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return radio_tea5777_set_freq(tea);
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}
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@ -304,32 +388,56 @@ static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
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struct v4l2_hw_freq_seek *a)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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u32 orig_freq = tea->freq;
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unsigned long timeout;
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int res, spacing = 200 * 16; /* 200 kHz */
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/* These are fixed *for now* */
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const u32 seek_rangelow = TEA5777_FM_RANGELOW;
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const u32 seek_rangehigh = TEA5777_FM_RANGEHIGH;
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int i, res, spacing;
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u32 orig_freq;
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if (a->tuner || a->wrap_around)
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return -EINVAL;
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tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
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if (seek_rangelow != tea->seek_rangelow) {
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tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
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tea->freq = seek_rangelow;
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res = radio_tea5777_set_freq(tea);
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if (res)
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goto leave;
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tea->seek_rangelow = tea->freq;
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if (a->rangelow || a->rangehigh) {
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for (i = 0; i < ARRAY_SIZE(bands); i++) {
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if (i == BAND_AM && !tea->has_am)
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continue;
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if (bands[i].rangelow >= a->rangelow &&
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bands[i].rangehigh <= a->rangehigh)
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break;
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}
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if (i == ARRAY_SIZE(bands))
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return -EINVAL; /* No matching band found */
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tea->band = i;
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if (tea->freq < a->rangelow || tea->freq > a->rangehigh) {
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tea->freq = clamp(tea->freq, a->rangelow,
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a->rangehigh);
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res = radio_tea5777_set_freq(tea);
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if (res)
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return res;
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}
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} else {
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a->rangelow = bands[tea->band].rangelow;
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a->rangehigh = bands[tea->band].rangehigh;
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}
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if (seek_rangehigh != tea->seek_rangehigh) {
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tea->write_reg |= TEA5777_W_UPDWN_MASK;
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tea->freq = seek_rangehigh;
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spacing = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
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orig_freq = tea->freq;
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tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
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if (tea->seek_rangelow != a->rangelow) {
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tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
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tea->freq = a->rangelow;
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res = radio_tea5777_set_freq(tea);
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if (res)
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goto leave;
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tea->seek_rangehigh = tea->freq;
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tea->seek_rangelow = a->rangelow;
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}
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if (tea->seek_rangehigh != a->rangehigh) {
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tea->write_reg |= TEA5777_W_UPDWN_MASK;
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tea->freq = a->rangehigh;
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res = radio_tea5777_set_freq(tea);
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if (res)
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goto leave;
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tea->seek_rangehigh = a->rangehigh;
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}
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tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
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@ -417,6 +525,7 @@ static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
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.vidioc_g_frequency = vidioc_g_frequency,
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.vidioc_s_frequency = vidioc_s_frequency,
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.vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
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.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
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.vidioc_log_status = v4l2_ctrl_log_status,
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.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
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.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
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@ -439,8 +548,9 @@ int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
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(1LL << TEA5777_W_IFW_SHIFT) |
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(1LL << TEA5777_W_INTEXT_SHIFT) |
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(1LL << TEA5777_W_CHP0_SHIFT) |
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(2LL << TEA5777_W_SLEV_SHIFT);
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(1LL << TEA5777_W_SLEV_SHIFT);
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tea->freq = 90500 * 16; /* 90.5Mhz default */
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tea->audmode = V4L2_TUNER_MODE_STEREO;
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res = radio_tea5777_set_freq(tea);
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if (res) {
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v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
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@ -68,7 +68,9 @@ struct radio_tea5777 {
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bool has_am; /* Device can tune to AM freqs */
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bool write_before_read; /* must write before read quirk */
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bool needs_write; /* for write before read quirk */
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u32 band; /* current band */
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u32 freq; /* current frequency */
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u32 audmode; /* last set audmode */
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u32 seek_rangelow; /* current hwseek limits */
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u32 seek_rangehigh;
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u32 read_reg;
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