OpenCloudOS-Kernel/drivers/media/radio/tea575x.c

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/*
* 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/module.h>
#include <linux/init.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#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/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);
}
/*
* Linux Video interface
*/
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
struct snd_tea575x *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, tea->tea5759 ? " TEA5759" : " TEA5757", sizeof(v->card));
strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
if (!tea->cannot_read_data)
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 snd_tea575x *tea = video_drvdata(file);
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;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct snd_tea575x *tea = video_drvdata(file);
struct v4l2_frequency_band band_fm = { 0, };
if (v->index > 0)
return -EINVAL;
snd_tea575x_read(tea);
vidioc_enum_freq_bands(file, priv, &band_fm);
memset(v, 0, sizeof(*v));
strlcpy(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;
}
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;
}
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);
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;
}
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);
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;
/* 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;
}
void snd_tea575x_exit(struct snd_tea575x *tea)
{
video_unregister_device(&tea->vd);
v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
}
static int __init alsa_tea575x_module_init(void)
{
return 0;
}
static void __exit alsa_tea575x_module_exit(void)
{
}
module_init(alsa_tea575x_module_init)
module_exit(alsa_tea575x_module_exit)
EXPORT_SYMBOL(snd_tea575x_init);
EXPORT_SYMBOL(snd_tea575x_exit);
EXPORT_SYMBOL(snd_tea575x_set_freq);