/*
* 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>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#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);
strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
strlcpy(v->card, tea->card, sizeof(v->card));
strlcat(v->card, " TEA5777", sizeof(v->card));
strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
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)
strlcpy(v->name, "AM/FM", sizeof(v->name));
else
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_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);
strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
tea->vd.lock = &tea->mutex;
tea->vd.v4l2_dev = tea->v4l2_dev;
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);