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alistair23-linux/drivers/media/radio/radio-tea5764.c
Sakari Ailus bcb63314e2 [media] media: Drop FSF's postal address from the source code files 
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.

The patch has been created with the following command without manual edits:

git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
	drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
	&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2017-01-27 11:38:09 -02:00

542 lines
14 KiB
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/*
* driver/media/radio/radio-tea5764.c
*
* Driver for TEA5764 radio chip for linux 2.6.
* This driver is for TEA5764 chip from NXP, used in EZX phones from Motorola.
* The I2C protocol is used for communicate with chip.
*
* Based in radio-tea5761.c Copyright (C) 2005 Nokia Corporation
*
* Copyright (c) 2008 Fabio Belavenuto <belavenuto@gmail.com>
*
* 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.
*
* History:
* 2008-12-06 Fabio Belavenuto <belavenuto@gmail.com>
* initial code
*
* TODO:
* add platform_data support for IRQs platform dependencies
* add RDS support
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h> /* Initdata */
#include <linux/videodev2.h> /* kernel radio structs */
#include <linux/i2c.h> /* I2C */
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#define DRIVER_VERSION "0.0.2"
#define DRIVER_AUTHOR "Fabio Belavenuto <belavenuto@gmail.com>"
#define DRIVER_DESC "A driver for the TEA5764 radio chip for EZX Phones."
#define PINFO(format, ...)\
printk(KERN_INFO KBUILD_MODNAME ": "\
DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
#define PWARN(format, ...)\
printk(KERN_WARNING KBUILD_MODNAME ": "\
DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
# define PDEBUG(format, ...)\
printk(KERN_DEBUG KBUILD_MODNAME ": "\
DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
/* Frequency limits in MHz -- these are European values. For Japanese
devices, that would be 76000 and 91000. */
#define FREQ_MIN 87500U
#define FREQ_MAX 108000U
#define FREQ_MUL 16
/* TEA5764 registers */
#define TEA5764_MANID 0x002b
#define TEA5764_CHIPID 0x5764
#define TEA5764_INTREG_BLMSK 0x0001
#define TEA5764_INTREG_FRRMSK 0x0002
#define TEA5764_INTREG_LEVMSK 0x0008
#define TEA5764_INTREG_IFMSK 0x0010
#define TEA5764_INTREG_BLMFLAG 0x0100
#define TEA5764_INTREG_FRRFLAG 0x0200
#define TEA5764_INTREG_LEVFLAG 0x0800
#define TEA5764_INTREG_IFFLAG 0x1000
#define TEA5764_FRQSET_SUD 0x8000
#define TEA5764_FRQSET_SM 0x4000
#define TEA5764_TNCTRL_PUPD1 0x8000
#define TEA5764_TNCTRL_PUPD0 0x4000
#define TEA5764_TNCTRL_BLIM 0x2000
#define TEA5764_TNCTRL_SWPM 0x1000
#define TEA5764_TNCTRL_IFCTC 0x0800
#define TEA5764_TNCTRL_AFM 0x0400
#define TEA5764_TNCTRL_SMUTE 0x0200
#define TEA5764_TNCTRL_SNC 0x0100
#define TEA5764_TNCTRL_MU 0x0080
#define TEA5764_TNCTRL_SSL1 0x0040
#define TEA5764_TNCTRL_SSL0 0x0020
#define TEA5764_TNCTRL_HLSI 0x0010
#define TEA5764_TNCTRL_MST 0x0008
#define TEA5764_TNCTRL_SWP 0x0004
#define TEA5764_TNCTRL_DTC 0x0002
#define TEA5764_TNCTRL_AHLSI 0x0001
#define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4)
#define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9)
#define TEA5764_TUNCHK_TUNTO 0x0100
#define TEA5764_TUNCHK_LD 0x0008
#define TEA5764_TUNCHK_STEREO 0x0004
#define TEA5764_TESTREG_TRIGFR 0x0800
struct tea5764_regs {
u16 intreg; /* INTFLAG & INTMSK */
u16 frqset; /* FRQSETMSB & FRQSETLSB */
u16 tnctrl; /* TNCTRL1 & TNCTRL2 */
u16 frqchk; /* FRQCHKMSB & FRQCHKLSB */
u16 tunchk; /* IFCHK & LEVCHK */
u16 testreg; /* TESTBITS & TESTMODE */
u16 rdsstat; /* RDSSTAT1 & RDSSTAT2 */
u16 rdslb; /* RDSLBMSB & RDSLBLSB */
u16 rdspb; /* RDSPBMSB & RDSPBLSB */
u16 rdsbc; /* RDSBBC & RDSGBC */
u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */
u16 rdsbbl; /* PAUSEDET & RDSBBL */
u16 manid; /* MANID1 & MANID2 */
u16 chipid; /* CHIPID1 & CHIPID2 */
} __attribute__ ((packed));
struct tea5764_write_regs {
u8 intreg; /* INTMSK */
__be16 frqset; /* FRQSETMSB & FRQSETLSB */
__be16 tnctrl; /* TNCTRL1 & TNCTRL2 */
__be16 testreg; /* TESTBITS & TESTMODE */
__be16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */
__be16 rdsbbl; /* PAUSEDET & RDSBBL */
} __attribute__ ((packed));
#ifdef CONFIG_RADIO_TEA5764_XTAL
#define RADIO_TEA5764_XTAL 1
#else
#define RADIO_TEA5764_XTAL 0
#endif
static int radio_nr = -1;
static int use_xtal = RADIO_TEA5764_XTAL;
struct tea5764_device {
struct v4l2_device v4l2_dev;
struct v4l2_ctrl_handler ctrl_handler;
struct i2c_client *i2c_client;
struct video_device vdev;
struct tea5764_regs regs;
struct mutex mutex;
};
/* I2C code related */
static int tea5764_i2c_read(struct tea5764_device *radio)
{
int i;
u16 *p = (u16 *) &radio->regs;
struct i2c_msg msgs[1] = {
{ .addr = radio->i2c_client->addr,
.flags = I2C_M_RD,
.len = sizeof(radio->regs),
.buf = (void *)&radio->regs
},
};
if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
return -EIO;
for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++)
p[i] = __be16_to_cpu((__force __be16)p[i]);
return 0;
}
static int tea5764_i2c_write(struct tea5764_device *radio)
{
struct tea5764_write_regs wr;
struct tea5764_regs *r = &radio->regs;
struct i2c_msg msgs[1] = {
{
.addr = radio->i2c_client->addr,
.len = sizeof(wr),
.buf = (void *)&wr
},
};
wr.intreg = r->intreg & 0xff;
wr.frqset = __cpu_to_be16(r->frqset);
wr.tnctrl = __cpu_to_be16(r->tnctrl);
wr.testreg = __cpu_to_be16(r->testreg);
wr.rdsctrl = __cpu_to_be16(r->rdsctrl);
wr.rdsbbl = __cpu_to_be16(r->rdsbbl);
if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
return -EIO;
return 0;
}
static void tea5764_power_up(struct tea5764_device *radio)
{
struct tea5764_regs *r = &radio->regs;
if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) {
r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU |
TEA5764_TNCTRL_HLSI);
if (!use_xtal)
r->testreg |= TEA5764_TESTREG_TRIGFR;
else
r->testreg &= ~TEA5764_TESTREG_TRIGFR;
r->tnctrl |= TEA5764_TNCTRL_PUPD0;
tea5764_i2c_write(radio);
}
}
static void tea5764_power_down(struct tea5764_device *radio)
{
struct tea5764_regs *r = &radio->regs;
if (r->tnctrl & TEA5764_TNCTRL_PUPD0) {
r->tnctrl &= ~TEA5764_TNCTRL_PUPD0;
tea5764_i2c_write(radio);
}
}
static void tea5764_set_freq(struct tea5764_device *radio, int freq)
{
struct tea5764_regs *r = &radio->regs;
/* formula: (freq [+ or -] 225000) / 8192 */
if (r->tnctrl & TEA5764_TNCTRL_HLSI)
r->frqset = (freq + 225000) / 8192;
else
r->frqset = (freq - 225000) / 8192;
}
static int tea5764_get_freq(struct tea5764_device *radio)
{
struct tea5764_regs *r = &radio->regs;
if (r->tnctrl & TEA5764_TNCTRL_HLSI)
return (r->frqchk * 8192) - 225000;
else
return (r->frqchk * 8192) + 225000;
}
/* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
static void tea5764_tune(struct tea5764_device *radio, int freq)
{
tea5764_set_freq(radio, freq);
if (tea5764_i2c_write(radio))
PWARN("Could not set frequency!");
}
static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode)
{
struct tea5764_regs *r = &radio->regs;
int tnctrl = r->tnctrl;
if (audmode == V4L2_TUNER_MODE_MONO)
r->tnctrl |= TEA5764_TNCTRL_MST;
else
r->tnctrl &= ~TEA5764_TNCTRL_MST;
if (tnctrl != r->tnctrl)
tea5764_i2c_write(radio);
}
static int tea5764_get_audout_mode(struct tea5764_device *radio)
{
struct tea5764_regs *r = &radio->regs;
if (r->tnctrl & TEA5764_TNCTRL_MST)
return V4L2_TUNER_MODE_MONO;
else
return V4L2_TUNER_MODE_STEREO;
}
static void tea5764_mute(struct tea5764_device *radio, int on)
{
struct tea5764_regs *r = &radio->regs;
int tnctrl = r->tnctrl;
if (on)
r->tnctrl |= TEA5764_TNCTRL_MU;
else
r->tnctrl &= ~TEA5764_TNCTRL_MU;
if (tnctrl != r->tnctrl)
tea5764_i2c_write(radio);
}
/* V4L2 vidioc */
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
struct tea5764_device *radio = video_drvdata(file);
struct video_device *dev = &radio->vdev;
strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver));
strlcpy(v->card, dev->name, sizeof(v->card));
snprintf(v->bus_info, sizeof(v->bus_info),
"I2C:%s", dev_name(&dev->dev));
v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct tea5764_device *radio = video_drvdata(file);
struct tea5764_regs *r = &radio->regs;
if (v->index > 0)
return -EINVAL;
strlcpy(v->name, "FM", sizeof(v->name));
v->type = V4L2_TUNER_RADIO;
tea5764_i2c_read(radio);
v->rangelow = FREQ_MIN * FREQ_MUL;
v->rangehigh = FREQ_MAX * FREQ_MUL;
v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
if (r->tunchk & TEA5764_TUNCHK_STEREO)
v->rxsubchans = V4L2_TUNER_SUB_STEREO;
else
v->rxsubchans = V4L2_TUNER_SUB_MONO;
v->audmode = tea5764_get_audout_mode(radio);
v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf;
v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *v)
{
struct tea5764_device *radio = video_drvdata(file);
if (v->index > 0)
return -EINVAL;
tea5764_set_audout_mode(radio, v->audmode);
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct tea5764_device *radio = video_drvdata(file);
unsigned freq = f->frequency;
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
return -EINVAL;
if (freq == 0) {
/* We special case this as a power down control. */
tea5764_power_down(radio);
/* Yes, that's what is returned in this case. This
whole special case is non-compliant and should really
be replaced with something better, but changing this
might well break code that depends on this behavior.
So we keep it as-is. */
return -EINVAL;
}
freq = clamp(freq, FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL);
tea5764_power_up(radio);
tea5764_tune(radio, (freq * 125) / 2);
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct tea5764_device *radio = video_drvdata(file);
struct tea5764_regs *r = &radio->regs;
if (f->tuner != 0)
return -EINVAL;
tea5764_i2c_read(radio);
f->type = V4L2_TUNER_RADIO;
if (r->tnctrl & TEA5764_TNCTRL_PUPD0)
f->frequency = (tea5764_get_freq(radio) * 2) / 125;
else
f->frequency = 0;
return 0;
}
static int tea5764_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct tea5764_device *radio =
container_of(ctrl->handler, struct tea5764_device, ctrl_handler);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
tea5764_mute(radio, ctrl->val);
return 0;
}
return -EINVAL;
}
static const struct v4l2_ctrl_ops tea5764_ctrl_ops = {
.s_ctrl = tea5764_s_ctrl,
};
/* File system interface */
static const struct v4l2_file_operations tea5764_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = v4l2_fh_release,
.poll = v4l2_ctrl_poll,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops tea5764_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_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
/* V4L2 interface */
static struct video_device tea5764_radio_template = {
.name = "TEA5764 FM-Radio",
.fops = &tea5764_fops,
.ioctl_ops = &tea5764_ioctl_ops,
.release = video_device_release_empty,
};
/* I2C probe: check if the device exists and register with v4l if it is */
static int tea5764_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct tea5764_device *radio;
struct v4l2_device *v4l2_dev;
struct v4l2_ctrl_handler *hdl;
struct tea5764_regs *r;
int ret;
PDEBUG("probe");
radio = kzalloc(sizeof(struct tea5764_device), GFP_KERNEL);
if (!radio)
return -ENOMEM;
v4l2_dev = &radio->v4l2_dev;
ret = v4l2_device_register(&client->dev, v4l2_dev);
if (ret < 0) {
v4l2_err(v4l2_dev, "could not register v4l2_device\n");
goto errfr;
}
hdl = &radio->ctrl_handler;
v4l2_ctrl_handler_init(hdl, 1);
v4l2_ctrl_new_std(hdl, &tea5764_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
v4l2_dev->ctrl_handler = hdl;
if (hdl->error) {
ret = hdl->error;
v4l2_err(v4l2_dev, "Could not register controls\n");
goto errunreg;
}
mutex_init(&radio->mutex);
radio->i2c_client = client;
ret = tea5764_i2c_read(radio);
if (ret)
goto errunreg;
r = &radio->regs;
PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid);
if (r->chipid != TEA5764_CHIPID ||
(r->manid & 0x0fff) != TEA5764_MANID) {
PWARN("This chip is not a TEA5764!");
ret = -EINVAL;
goto errunreg;
}
radio->vdev = tea5764_radio_template;
i2c_set_clientdata(client, radio);
video_set_drvdata(&radio->vdev, radio);
radio->vdev.lock = &radio->mutex;
radio->vdev.v4l2_dev = v4l2_dev;
/* initialize and power off the chip */
tea5764_i2c_read(radio);
tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO);
tea5764_mute(radio, 1);
tea5764_power_down(radio);
ret = video_register_device(&radio->vdev, VFL_TYPE_RADIO, radio_nr);
if (ret < 0) {
PWARN("Could not register video device!");
goto errunreg;
}
PINFO("registered.");
return 0;
errunreg:
v4l2_ctrl_handler_free(hdl);
v4l2_device_unregister(v4l2_dev);
errfr:
kfree(radio);
return ret;
}
static int tea5764_i2c_remove(struct i2c_client *client)
{
struct tea5764_device *radio = i2c_get_clientdata(client);
PDEBUG("remove");
if (radio) {
tea5764_power_down(radio);
video_unregister_device(&radio->vdev);
v4l2_ctrl_handler_free(&radio->ctrl_handler);
v4l2_device_unregister(&radio->v4l2_dev);
kfree(radio);
}
return 0;
}
/* I2C subsystem interface */
static const struct i2c_device_id tea5764_id[] = {
{ "radio-tea5764", 0 },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(i2c, tea5764_id);
static struct i2c_driver tea5764_i2c_driver = {
.driver = {
.name = "radio-tea5764",
},
.probe = tea5764_i2c_probe,
.remove = tea5764_i2c_remove,
.id_table = tea5764_id,
};
module_i2c_driver(tea5764_i2c_driver);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_VERSION(DRIVER_VERSION);
module_param(use_xtal, int, 0);
MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board");
module_param(radio_nr, int, 0);
MODULE_PARM_DESC(radio_nr, "video4linux device number to use");
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