| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hans de Goede | 813 | 28.98% | 5 | 13.51% |
| Ondrej Zary | 768 | 27.38% | 9 | 24.32% |
| Hans Verkuil | 549 | 19.57% | 11 | 29.73% |
| Mauro Carvalho Chehab | 334 | 11.91% | 4 | 10.81% |
| Jaroslav Kysela | 319 | 11.37% | 3 | 8.11% |
| Andy Shevchenko | 10 | 0.36% | 1 | 2.70% |
| Takashi Iwai | 5 | 0.18% | 1 | 2.70% |
| Paul Gortmaker | 3 | 0.11% | 1 | 2.70% |
| Tejun Heo | 2 | 0.07% | 1 | 2.70% |
| Thomas Gleixner | 2 | 0.07% | 1 | 2.70% |
| Total | 2805 | 37 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * 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/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/sched.h> #include <asm/io.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 <media/drv-intf/tea575x.h> MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips"); MODULE_LICENSE("GPL"); /* * definitions */ #define TEA575X_BIT_SEARCH (1<<24) /* 1 = search action, 0 = tuned */ #define TEA575X_BIT_UPDOWN (1<<23) /* 0 = search down, 1 = search up */ #define TEA575X_BIT_MONO (1<<22) /* 0 = stereo, 1 = mono */ #define TEA575X_BIT_BAND_MASK (3<<20) #define TEA575X_BIT_BAND_FM (0<<20) #define TEA575X_BIT_BAND_MW (1<<20) #define TEA575X_BIT_BAND_LW (2<<20) #define TEA575X_BIT_BAND_SW (3<<20) #define TEA575X_BIT_PORT_0 (1<<19) /* user bit */ #define TEA575X_BIT_PORT_1 (1<<18) /* user bit */ #define TEA575X_BIT_SEARCH_MASK (3<<16) /* search level */ #define TEA575X_BIT_SEARCH_5_28 (0<<16) /* FM >5uV, AM >28uV */ #define TEA575X_BIT_SEARCH_10_40 (1<<16) /* FM >10uV, AM > 40uV */ #define TEA575X_BIT_SEARCH_30_63 (2<<16) /* FM >30uV, AM > 63uV */ #define TEA575X_BIT_SEARCH_150_1000 (3<<16) /* FM > 150uV, AM > 1000uV */ #define TEA575X_BIT_DUMMY (1<<15) /* buffer */ #define TEA575X_BIT_FREQ_MASK 0x7fff enum { BAND_FM, BAND_FM_JAPAN, 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, .rangelow = 87500 * 16, .rangehigh = 108000 * 16, .modulation = V4L2_BAND_MODULATION_FM, }, { .type = V4L2_TUNER_RADIO, .index = 0, .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_FREQ_BANDS, .rangelow = 76000 * 16, .rangehigh = 91000 * 16, .modulation = V4L2_BAND_MODULATION_FM, }, { .type = V4L2_TUNER_RADIO, .index = 1, .capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS, .rangelow = 530 * 16, .rangehigh = 1710 * 16, .modulation = V4L2_BAND_MODULATION_AM, }, }; /* * lowlevel part */ static void snd_tea575x_write(struct snd_tea575x *tea, unsigned int val) { u16 l; u8 data; if (tea->ops->write_val) return tea->ops->write_val(tea, val); tea->ops->set_direction(tea, 1); udelay(16); for (l = 25; l > 0; l--) { data = (val >> 24) & TEA575X_DATA; val <<= 1; /* shift data */ tea->ops->set_pins(tea, data | TEA575X_WREN); udelay(2); tea->ops->set_pins(tea, data | TEA575X_WREN | TEA575X_CLK); udelay(2); tea->ops->set_pins(tea, data | TEA575X_WREN); udelay(2); } if (!tea->mute) tea->ops->set_pins(tea, 0); } static u32 snd_tea575x_read(struct snd_tea575x *tea) { u16 l, rdata; u32 data = 0; if (tea->ops->read_val) return tea->ops->read_val(tea); tea->ops->set_direction(tea, 0); tea->ops->set_pins(tea, 0); udelay(16); for (l = 24; l--;) { tea->ops->set_pins(tea, TEA575X_CLK); udelay(2); if (!l) tea->tuned = tea->ops->get_pins(tea) & TEA575X_MOST ? 0 : 1; tea->ops->set_pins(tea, 0); udelay(2); data <<= 1; /* shift data */ rdata = tea->ops->get_pins(tea); if (!l) tea->stereo = (rdata & TEA575X_MOST) ? 0 : 1; if (rdata & TEA575X_DATA) data++; udelay(2); } if (tea->mute) tea->ops->set_pins(tea, TEA575X_WREN); return data; } static u32 snd_tea575x_val_to_freq(struct snd_tea575x *tea, u32 val) { u32 freq = val & TEA575X_BIT_FREQ_MASK; if (freq == 0) return freq; switch (tea->band) { case BAND_FM: /* freq *= 12.5 */ freq *= 125; freq /= 10; /* crystal fixup */ freq -= TEA575X_FMIF; break; case BAND_FM_JAPAN: /* freq *= 12.5 */ freq *= 125; freq /= 10; /* crystal fixup */ freq += TEA575X_FMIF; break; case BAND_AM: /* crystal fixup */ freq -= TEA575X_AMIF; break; } return clamp(freq * 16, bands[tea->band].rangelow, bands[tea->band].rangehigh); /* from kHz */ } static u32 snd_tea575x_get_freq(struct snd_tea575x *tea) { return snd_tea575x_val_to_freq(tea, snd_tea575x_read(tea)); } void snd_tea575x_set_freq(struct snd_tea575x *tea) { u32 freq = tea->freq / 16; /* to kHz */ u32 band = 0; switch (tea->band) { case BAND_FM: band = TEA575X_BIT_BAND_FM; /* crystal fixup */ freq += TEA575X_FMIF; /* freq /= 12.5 */ freq *= 10; freq /= 125; break; case BAND_FM_JAPAN: band = TEA575X_BIT_BAND_FM; /* crystal fixup */ freq -= TEA575X_FMIF; /* freq /= 12.5 */ freq *= 10; freq /= 125; break; case BAND_AM: band = TEA575X_BIT_BAND_MW; /* crystal fixup */ freq += TEA575X_AMIF; break; } tea->val &= ~(TEA575X_BIT_FREQ_MASK | TEA575X_BIT_BAND_MASK); tea->val |= band; tea->val |= freq & TEA575X_BIT_FREQ_MASK; snd_tea575x_write(tea, tea->val); tea->freq = snd_tea575x_val_to_freq(tea, tea->val); } EXPORT_SYMBOL(snd_tea575x_set_freq); /* * Linux Video interface */ static int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *v) { struct snd_tea575x *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, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card)); strscpy(v->bus_info, tea->bus_info, sizeof(v->bus_info)); return 0; } int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea, struct v4l2_frequency_band *band) { int index; if (band->tuner != 0) return -EINVAL; switch (band->index) { case 0: if (tea->tea5759) index = BAND_FM_JAPAN; else index = BAND_FM; break; case 1: if (tea->has_am) { index = BAND_AM; break; } /* Fall through */ default: return -EINVAL; } *band = bands[index]; if (!tea->cannot_read_data) band->capability |= V4L2_TUNER_CAP_HWSEEK_BOUNDED; return 0; } EXPORT_SYMBOL(snd_tea575x_enum_freq_bands); static int vidioc_enum_freq_bands(struct file *file, void *priv, struct v4l2_frequency_band *band) { struct snd_tea575x *tea = video_drvdata(file); return snd_tea575x_enum_freq_bands(tea, band); } int snd_tea575x_g_tuner(struct snd_tea575x *tea, struct v4l2_tuner *v) { struct v4l2_frequency_band band_fm = { 0, }; if (v->index > 0) return -EINVAL; snd_tea575x_read(tea); snd_tea575x_enum_freq_bands(tea, &band_fm); memset(v, 0, sizeof(*v)); strscpy(v->name, tea->has_am ? "FM/AM" : "FM", sizeof(v->name)); v->type = V4L2_TUNER_RADIO; v->capability = band_fm.capability; v->rangelow = tea->has_am ? bands[BAND_AM].rangelow : band_fm.rangelow; v->rangehigh = band_fm.rangehigh; v->rxsubchans = tea->stereo ? V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO; v->audmode = (tea->val & TEA575X_BIT_MONO) ? V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO; v->signal = tea->tuned ? 0xffff : 0; return 0; } EXPORT_SYMBOL(snd_tea575x_g_tuner); static int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *v) { struct snd_tea575x *tea = video_drvdata(file); return snd_tea575x_g_tuner(tea, v); } static int vidioc_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *v) { struct snd_tea575x *tea = video_drvdata(file); u32 orig_val = tea->val; if (v->index) return -EINVAL; tea->val &= ~TEA575X_BIT_MONO; if (v->audmode == V4L2_TUNER_MODE_MONO) tea->val |= TEA575X_BIT_MONO; /* Only apply changes if currently tuning FM */ if (tea->band != BAND_AM && tea->val != orig_val) snd_tea575x_set_freq(tea); return 0; } static int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f) { struct snd_tea575x *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 snd_tea575x *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 if (tea->tea5759) tea->band = BAND_FM_JAPAN; else tea->band = BAND_FM; tea->freq = clamp_t(u32, f->frequency, bands[tea->band].rangelow, bands[tea->band].rangehigh); snd_tea575x_set_freq(tea); return 0; } int snd_tea575x_s_hw_freq_seek(struct file *file, struct snd_tea575x *tea, const struct v4l2_hw_freq_seek *a) { unsigned long timeout; int i, spacing; if (tea->cannot_read_data) return -ENOTTY; if (a->tuner || a->wrap_around) return -EINVAL; if (file->f_flags & O_NONBLOCK) return -EWOULDBLOCK; if (a->rangelow || a->rangehigh) { for (i = 0; i < ARRAY_SIZE(bands); i++) { if ((i == BAND_FM && tea->tea5759) || (i == BAND_FM_JAPAN && !tea->tea5759) || (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 */ if (i != tea->band) { tea->band = i; tea->freq = clamp(tea->freq, bands[i].rangelow, bands[i].rangehigh); snd_tea575x_set_freq(tea); } } spacing = (tea->band == BAND_AM) ? 5 : 50; /* kHz */ /* clear the frequency, HW will fill it in */ tea->val &= ~TEA575X_BIT_FREQ_MASK; tea->val |= TEA575X_BIT_SEARCH; if (a->seek_upward) tea->val |= TEA575X_BIT_UPDOWN; else tea->val &= ~TEA575X_BIT_UPDOWN; snd_tea575x_write(tea, tea->val); timeout = jiffies + msecs_to_jiffies(10000); for (;;) { if (time_after(jiffies, timeout)) break; if (schedule_timeout_interruptible(msecs_to_jiffies(10))) { /* some signal arrived, stop search */ tea->val &= ~TEA575X_BIT_SEARCH; snd_tea575x_set_freq(tea); return -ERESTARTSYS; } if (!(snd_tea575x_read(tea) & TEA575X_BIT_SEARCH)) { u32 freq; /* Found a frequency, wait until it can be read */ for (i = 0; i < 100; i++) { msleep(10); freq = snd_tea575x_get_freq(tea); if (freq) /* available */ break; } if (freq == 0) /* shouldn't happen */ break; /* * if we moved by less than the spacing, or in the * wrong direction, continue seeking */ if (abs(tea->freq - freq) < 16 * spacing || (a->seek_upward && freq < tea->freq) || (!a->seek_upward && freq > tea->freq)) { snd_tea575x_write(tea, tea->val); continue; } tea->freq = freq; tea->val &= ~TEA575X_BIT_SEARCH; return 0; } } tea->val &= ~TEA575X_BIT_SEARCH; snd_tea575x_set_freq(tea); return -ENODATA; } EXPORT_SYMBOL(snd_tea575x_s_hw_freq_seek); static int vidioc_s_hw_freq_seek(struct file *file, void *fh, const struct v4l2_hw_freq_seek *a) { struct snd_tea575x *tea = video_drvdata(file); return snd_tea575x_s_hw_freq_seek(file, tea, a); } static int tea575x_s_ctrl(struct v4l2_ctrl *ctrl) { struct snd_tea575x *tea = container_of(ctrl->handler, struct snd_tea575x, ctrl_handler); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: tea->mute = ctrl->val; snd_tea575x_set_freq(tea); return 0; } 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 snd_tea575x_hw_init(struct snd_tea575x *tea) { tea->mute = true; /* Not all devices can or know how to read the data back. Such devices can set cannot_read_data to true. */ if (!tea->cannot_read_data) { snd_tea575x_write(tea, 0x55AA); if (snd_tea575x_read(tea) != 0x55AA) return -ENODEV; } tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_5_28; tea->freq = 90500 * 16; /* 90.5Mhz default */ snd_tea575x_set_freq(tea); return 0; } EXPORT_SYMBOL(snd_tea575x_hw_init); int snd_tea575x_init(struct snd_tea575x *tea, struct module *owner) { int retval = snd_tea575x_hw_init(tea); if (retval) return retval; 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; if (!tea->cannot_read_data) tea->vd.device_caps |= V4L2_CAP_HW_FREQ_SEEK; tea->fops = tea575x_fops; tea->fops.owner = owner; tea->vd.fops = &tea->fops; /* disable hw_freq_seek if we can't use it */ if (tea->cannot_read_data) v4l2_disable_ioctl(&tea->vd, VIDIOC_S_HW_FREQ_SEEK); if (!tea->cannot_mute) { 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); retval = tea->ctrl_handler.error; if (retval) { v4l2_err(tea->v4l2_dev, "can't initialize controls\n"); v4l2_ctrl_handler_free(&tea->ctrl_handler); return retval; } if (tea->ext_init) { retval = tea->ext_init(tea); if (retval) { v4l2_ctrl_handler_free(&tea->ctrl_handler); return retval; } } v4l2_ctrl_handler_setup(&tea->ctrl_handler); } retval = video_register_device(&tea->vd, VFL_TYPE_RADIO, tea->radio_nr); if (retval) { v4l2_err(tea->v4l2_dev, "can't register video device!\n"); v4l2_ctrl_handler_free(tea->vd.ctrl_handler); return retval; } return 0; } EXPORT_SYMBOL(snd_tea575x_init); void snd_tea575x_exit(struct snd_tea575x *tea) { video_unregister_device(&tea->vd); v4l2_ctrl_handler_free(tea->vd.ctrl_handler); } EXPORT_SYMBOL(snd_tea575x_exit);
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