| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hans de Goede | 2695 | 97.75% | 3 | 27.27% |
| Hans Verkuil | 51 | 1.85% | 5 | 45.45% |
| Mauro Carvalho Chehab | 9 | 0.33% | 2 | 18.18% |
| Thomas Gleixner | 2 | 0.07% | 1 | 9.09% |
| Total | 2757 | 11 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * v4l2 driver for TEA5777 Philips AM/FM radio tuner chips * * Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com> * * Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips: * * Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz> */ #include <linux/delay.h> #include <linux/init.h> #include <linux/module.h> #include <linux/sched.h> #include <linux/slab.h> #include <media/v4l2-device.h> #include <media/v4l2-dev.h> #include <media/v4l2-fh.h> #include <media/v4l2-ioctl.h> #include <media/v4l2-event.h> #include "radio-tea5777.h" MODULE_AUTHOR("Hans de Goede <perex@perex.cz>"); MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips"); MODULE_LICENSE("GPL"); #define TEA5777_FM_IF 150 /* 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) #define TEA5777_W_MUTE_SHIFT 47 #define TEA5777_W_AM_FM_MASK (1LL << 46) #define TEA5777_W_AM_FM_SHIFT 46 #define TEA5777_W_STB_MASK (1LL << 45) #define TEA5777_W_STB_SHIFT 45 #define TEA5777_W_IFCE_MASK (1LL << 29) #define TEA5777_W_IFCE_SHIFT 29 #define TEA5777_W_IFW_MASK (1LL << 28) #define TEA5777_W_IFW_SHIFT 28 #define TEA5777_W_HILO_MASK (1LL << 27) #define TEA5777_W_HILO_SHIFT 27 #define TEA5777_W_DBUS_MASK (1LL << 26) #define TEA5777_W_DBUS_SHIFT 26 #define TEA5777_W_INTEXT_MASK (1LL << 24) #define TEA5777_W_INTEXT_SHIFT 24 #define TEA5777_W_P1_MASK (1LL << 23) #define TEA5777_W_P1_SHIFT 23 #define TEA5777_W_P0_MASK (1LL << 22) #define TEA5777_W_P0_SHIFT 22 #define TEA5777_W_PEN1_MASK (1LL << 21) #define TEA5777_W_PEN1_SHIFT 21 #define TEA5777_W_PEN0_MASK (1LL << 20) #define TEA5777_W_PEN0_SHIFT 20 #define TEA5777_W_CHP0_MASK (1LL << 18) #define TEA5777_W_CHP0_SHIFT 18 #define TEA5777_W_DEEM_MASK (1LL << 17) #define TEA5777_W_DEEM_SHIFT 17 #define TEA5777_W_SEARCH_MASK (1LL << 7) #define TEA5777_W_SEARCH_SHIFT 7 #define TEA5777_W_PROGBLIM_MASK (1LL << 6) #define TEA5777_W_PROGBLIM_SHIFT 6 #define TEA5777_W_UPDWN_MASK (1LL << 5) #define TEA5777_W_UPDWN_SHIFT 5 #define TEA5777_W_SLEV_MASK (3LL << 3) #define TEA5777_W_SLEV_SHIFT 3 /* Write reg, FM specific bits */ #define TEA5777_W_FM_PLL_MASK (0x1fffLL << 32) #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 0LL /* 50k steps, 150k IF */ #define TEA5777_W_FM_FORCEMONO_MASK (1LL << 15) #define TEA5777_W_FM_FORCEMONO_SHIFT 15 #define TEA5777_W_FM_SDSOFF_MASK (1LL << 14) #define TEA5777_W_FM_SDSOFF_SHIFT 14 #define TEA5777_W_FM_DOFF_MASK (1LL << 13) #define TEA5777_W_FM_DOFF_SHIFT 13 #define TEA5777_W_FM_STEP_MASK (3LL << 1) #define TEA5777_W_FM_STEP_SHIFT 1 /* Write reg, AM specific bits */ #define TEA5777_W_AM_PLL_MASK (0x7ffLL << 34) #define TEA5777_W_AM_PLL_SHIFT 34 #define TEA5777_W_AM_AGCRF_MASK (1LL << 33) #define TEA5777_W_AM_AGCRF_SHIFT 33 #define TEA5777_W_AM_AGCIF_MASK (1LL << 32) #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 #define TEA5777_W_AM_PEAK_MASK (1LL << 25) #define TEA5777_W_AM_PEAK_SHIFT 25 #define TEA5777_W_AM_RFB_MASK (1LL << 16) #define TEA5777_W_AM_RFB_SHIFT 16 #define TEA5777_W_AM_CALLIGN_MASK (1LL << 15) #define TEA5777_W_AM_CALLIGN_SHIFT 15 #define TEA5777_W_AM_CBANK_MASK (0x7fLL << 8) #define TEA5777_W_AM_CBANK_SHIFT 8 #define TEA5777_W_AM_DELAY_MASK (1LL << 2) #define TEA5777_W_AM_DELAY_SHIFT 2 #define TEA5777_W_AM_STEP_MASK (1LL << 1) #define TEA5777_W_AM_STEP_SHIFT 1 /* Read reg, common bits */ #define TEA5777_R_LEVEL_MASK (0x0f << 17) #define TEA5777_R_LEVEL_SHIFT 17 #define TEA5777_R_SFOUND_MASK (0x01 << 16) #define TEA5777_R_SFOUND_SHIFT 16 #define TEA5777_R_BLIM_MASK (0x01 << 15) #define TEA5777_R_BLIM_SHIFT 15 /* Read reg, FM specific bits */ #define TEA5777_R_FM_STEREO_MASK (0x01 << 21) #define TEA5777_R_FM_STEREO_SHIFT 21 #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) { 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 */ } int radio_tea5777_set_freq(struct radio_tea5777 *tea) { u32 freq; int res; freq = clamp(tea->freq, bands[tea->band].rangelow, bands[tea->band].rangehigh); freq = (freq + 8) / 16; /* to kHz */ 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) return res; tea->needs_write = false; tea->read_reg = -1; tea->freq = tea5777_freq_to_v4l2_freq(tea, freq); return 0; } static int radio_tea5777_update_read_reg(struct radio_tea5777 *tea, int wait) { int res; if (tea->read_reg != -1) return 0; if (tea->write_before_read && tea->needs_write) { res = radio_tea5777_set_freq(tea); if (res) return res; } if (wait) { if (schedule_timeout_interruptible(msecs_to_jiffies(wait))) return -ERESTARTSYS; } res = tea->ops->read_reg(tea, &tea->read_reg); if (res) return res; tea->needs_write = true; return 0; } /* * Linux Video interface */ static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *v) { struct radio_tea5777 *tea = video_drvdata(file); strscpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver)); strscpy(v->card, tea->card, sizeof(v->card)); strlcat(v->card, " TEA5777", sizeof(v->card)); strscpy(v->bus_info, tea->bus_info, sizeof(v->bus_info)); 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) { struct radio_tea5777 *tea = video_drvdata(file); int res; if (v->index > 0) return -EINVAL; res = radio_tea5777_update_read_reg(tea, 0); if (res) return res; memset(v, 0, sizeof(*v)); if (tea->has_am) strscpy(v->name, "AM/FM", sizeof(v->name)); else strscpy(v->name, "FM", sizeof(v->name)); v->type = V4L2_TUNER_RADIO; v->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; 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); /* Invalidate read_reg, so that next call we return up2date signal */ tea->read_reg = -1; return 0; } static int vidioc_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *v) { struct radio_tea5777 *tea = video_drvdata(file); u32 orig_audmode = tea->audmode; if (v->index) return -EINVAL; tea->audmode = v->audmode; if (tea->audmode > V4L2_TUNER_MODE_STEREO) tea->audmode = V4L2_TUNER_MODE_STEREO; 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, struct v4l2_frequency *f) { struct radio_tea5777 *tea = video_drvdata(file); if (f->tuner != 0) return -EINVAL; f->type = V4L2_TUNER_RADIO; f->frequency = tea->freq; return 0; } static int vidioc_s_frequency(struct file *file, void *priv, const struct v4l2_frequency *f) { struct radio_tea5777 *tea = video_drvdata(file); 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); } static int vidioc_s_hw_freq_seek(struct file *file, void *fh, const struct v4l2_hw_freq_seek *a) { struct radio_tea5777 *tea = video_drvdata(file); unsigned long timeout; u32 rangelow = a->rangelow; u32 rangehigh = a->rangehigh; int i, res, spacing; u32 orig_freq; if (a->tuner || a->wrap_around) return -EINVAL; if (file->f_flags & O_NONBLOCK) return -EWOULDBLOCK; if (rangelow || rangehigh) { for (i = 0; i < ARRAY_SIZE(bands); i++) { if (i == BAND_AM && !tea->has_am) continue; if (bands[i].rangelow >= rangelow && bands[i].rangehigh <= rangehigh) break; } if (i == ARRAY_SIZE(bands)) return -EINVAL; /* No matching band found */ tea->band = i; if (tea->freq < rangelow || tea->freq > rangehigh) { tea->freq = clamp(tea->freq, rangelow, rangehigh); res = radio_tea5777_set_freq(tea); if (res) return res; } } else { rangelow = bands[tea->band].rangelow; 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 (tea->seek_rangelow != rangelow) { tea->write_reg &= ~TEA5777_W_UPDWN_MASK; tea->freq = rangelow; res = radio_tea5777_set_freq(tea); if (res) goto leave; tea->seek_rangelow = rangelow; } if (tea->seek_rangehigh != rangehigh) { tea->write_reg |= TEA5777_W_UPDWN_MASK; tea->freq = rangehigh; res = radio_tea5777_set_freq(tea); if (res) goto leave; tea->seek_rangehigh = rangehigh; } tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK; tea->write_reg |= TEA5777_W_SEARCH_MASK; if (a->seek_upward) { tea->write_reg |= TEA5777_W_UPDWN_MASK; tea->freq = orig_freq + spacing; } else { tea->write_reg &= ~TEA5777_W_UPDWN_MASK; tea->freq = orig_freq - spacing; } res = radio_tea5777_set_freq(tea); if (res) goto leave; timeout = jiffies + msecs_to_jiffies(5000); for (;;) { if (time_after(jiffies, timeout)) { res = -ENODATA; break; } res = radio_tea5777_update_read_reg(tea, 100); if (res) break; /* * Note we use tea->freq to track how far we've searched sofar * this is necessary to ensure we continue seeking at the right * point, in the write_before_read case. */ tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK); tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq); if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) { tea->write_reg &= ~TEA5777_W_SEARCH_MASK; return 0; } if (tea->read_reg & TEA5777_R_BLIM_MASK) { res = -ENODATA; break; } /* Force read_reg update */ tea->read_reg = -1; } leave: tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK; tea->write_reg &= ~TEA5777_W_SEARCH_MASK; tea->freq = orig_freq; radio_tea5777_set_freq(tea); return res; } static int tea575x_s_ctrl(struct v4l2_ctrl *c) { struct radio_tea5777 *tea = container_of(c->handler, struct radio_tea5777, ctrl_handler); switch (c->id) { case V4L2_CID_AUDIO_MUTE: if (c->val) tea->write_reg |= TEA5777_W_MUTE_MASK; else tea->write_reg &= ~TEA5777_W_MUTE_MASK; return radio_tea5777_set_freq(tea); } return -EINVAL; } static const struct v4l2_file_operations tea575x_fops = { .unlocked_ioctl = video_ioctl2, .open = v4l2_fh_open, .release = v4l2_fh_release, .poll = v4l2_ctrl_poll, }; static const struct v4l2_ioctl_ops tea575x_ioctl_ops = { .vidioc_querycap = vidioc_querycap, .vidioc_g_tuner = vidioc_g_tuner, .vidioc_s_tuner = vidioc_s_tuner, .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, }; static const struct video_device tea575x_radio = { .ioctl_ops = &tea575x_ioctl_ops, .release = video_device_release_empty, }; static const struct v4l2_ctrl_ops tea575x_ctrl_ops = { .s_ctrl = tea575x_s_ctrl, }; int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner) { int res; tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) | (1LL << TEA5777_W_IFW_SHIFT) | (1LL << TEA5777_W_INTEXT_SHIFT) | (1LL << TEA5777_W_CHP0_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); return res; } tea->vd = tea575x_radio; video_set_drvdata(&tea->vd, tea); mutex_init(&tea->mutex); strscpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name)); tea->vd.lock = &tea->mutex; tea->vd.v4l2_dev = tea->v4l2_dev; tea->vd.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_HW_FREQ_SEEK; tea->fops = tea575x_fops; tea->fops.owner = owner; tea->vd.fops = &tea->fops; tea->vd.ctrl_handler = &tea->ctrl_handler; v4l2_ctrl_handler_init(&tea->ctrl_handler, 1); v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops, V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); res = tea->ctrl_handler.error; if (res) { v4l2_err(tea->v4l2_dev, "can't initialize controls\n"); v4l2_ctrl_handler_free(&tea->ctrl_handler); return res; } v4l2_ctrl_handler_setup(&tea->ctrl_handler); res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1); if (res) { v4l2_err(tea->v4l2_dev, "can't register video device!\n"); v4l2_ctrl_handler_free(tea->vd.ctrl_handler); return res; } return 0; } EXPORT_SYMBOL_GPL(radio_tea5777_init); void radio_tea5777_exit(struct radio_tea5777 *tea) { video_unregister_device(&tea->vd); v4l2_ctrl_handler_free(tea->vd.ctrl_handler); } EXPORT_SYMBOL_GPL(radio_tea5777_exit);
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