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linux-next/drivers/media/i2c/sony-btf-mpx.c
Uwe Kleine-König ed5c2f5fd1 i2c: Make remove callback return void 
The value returned by an i2c driver's remove function is mostly ignored.
(Only an error message is printed if the value is non-zero that the
error is ignored.)

So change the prototype of the remove function to return no value. This
way driver authors are not tempted to assume that passing an error to
the upper layer is a good idea. All drivers are adapted accordingly.
There is no intended change of behaviour, all callbacks were prepared to
return 0 before.

Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com>
Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Crt Mori <cmo@melexis.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Marek Behún <kabel@kernel.org> # for leds-turris-omnia
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Machata <petrm@nvidia.com> # for mlxsw
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for surface3_power
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> # for bmc150-accel-i2c + kxcjk-1013
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for media/* + staging/media/*
Acked-by: Miguel Ojeda <ojeda@kernel.org> # for auxdisplay/ht16k33 + auxdisplay/lcd2s
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for versaclock5
Reviewed-by: Ajay Gupta <ajayg@nvidia.com> # for ucsi_ccg
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio
Acked-by: Peter Rosin <peda@axentia.se> # for i2c-mux-*, max9860
Acked-by: Adrien Grassein <adrien.grassein@gmail.com> # for lontium-lt8912b
Reviewed-by: Jean Delvare <jdelvare@suse.de> # for hwmon, i2c-core and i2c/muxes
Acked-by: Corey Minyard <cminyard@mvista.com> # for IPMI
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for drivers/power
Acked-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-16 12:46:26 +02:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2005-2006 Micronas USA Inc.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/tuner.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-device.h>
#include <linux/slab.h>
MODULE_DESCRIPTION("sony-btf-mpx driver");
MODULE_LICENSE("GPL v2");
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug level 0=off(default) 1=on");
/* #define MPX_DEBUG */
/*
* Note:
*
* AS(IF/MPX) pin: LOW HIGH/OPEN
* IF/MPX address: 0x42/0x40 0x43/0x44
*/
static int force_mpx_mode = -1;
module_param(force_mpx_mode, int, 0644);
struct sony_btf_mpx {
struct v4l2_subdev sd;
int mpxmode;
u32 audmode;
};
static inline struct sony_btf_mpx *to_state(struct v4l2_subdev *sd)
{
return container_of(sd, struct sony_btf_mpx, sd);
}
static int mpx_write(struct i2c_client *client, int dev, int addr, int val)
{
u8 buffer[5];
struct i2c_msg msg;
buffer[0] = dev;
buffer[1] = addr >> 8;
buffer[2] = addr & 0xff;
buffer[3] = val >> 8;
buffer[4] = val & 0xff;
msg.addr = client->addr;
msg.flags = 0;
msg.len = 5;
msg.buf = buffer;
i2c_transfer(client->adapter, &msg, 1);
return 0;
}
/*
* MPX register values for the BTF-PG472Z:
*
* FM_ NICAM_ SCART_
* MODUS SOURCE ACB PRESCAL PRESCAL PRESCAL SYSTEM VOLUME
* 10/0030 12/0008 12/0013 12/000E 12/0010 12/0000 10/0020 12/0000
* ---------------------------------------------------------------
* Auto 1003 0020 0100 2603 5000 XXXX 0001 7500
*
* B/G
* Mono 1003 0020 0100 2603 5000 XXXX 0003 7500
* A2 1003 0020 0100 2601 5000 XXXX 0003 7500
* NICAM 1003 0120 0100 2603 5000 XXXX 0008 7500
*
* I
* Mono 1003 0020 0100 2603 7900 XXXX 000A 7500
* NICAM 1003 0120 0100 2603 7900 XXXX 000A 7500
*
* D/K
* Mono 1003 0020 0100 2603 5000 XXXX 0004 7500
* A2-1 1003 0020 0100 2601 5000 XXXX 0004 7500
* A2-2 1003 0020 0100 2601 5000 XXXX 0005 7500
* A2-3 1003 0020 0100 2601 5000 XXXX 0007 7500
* NICAM 1003 0120 0100 2603 5000 XXXX 000B 7500
*
* L/L'
* Mono 0003 0200 0100 7C03 5000 2200 0009 7500
* NICAM 0003 0120 0100 7C03 5000 XXXX 0009 7500
*
* M
* Mono 1003 0200 0100 2B03 5000 2B00 0002 7500
*
* For Asia, replace the 0x26XX in FM_PRESCALE with 0x14XX.
*
* Bilingual selection in A2/NICAM:
*
* High byte of SOURCE Left chan Right chan
* 0x01 MAIN SUB
* 0x03 MAIN MAIN
* 0x04 SUB SUB
*
* Force mono in NICAM by setting the high byte of SOURCE to 0x02 (L/L') or
* 0x00 (all other bands). Force mono in A2 with FMONO_A2:
*
* FMONO_A2
* 10/0022
* --------
* Forced mono ON 07F0
* Forced mono OFF 0190
*/
static const struct {
enum { AUD_MONO, AUD_A2, AUD_NICAM, AUD_NICAM_L } audio_mode;
u16 modus;
u16 source;
u16 acb;
u16 fm_prescale;
u16 nicam_prescale;
u16 scart_prescale;
u16 system;
u16 volume;
} mpx_audio_modes[] = {
/* Auto */ { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
0x5000, 0x0000, 0x0001, 0x7500 },
/* B/G Mono */ { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
0x5000, 0x0000, 0x0003, 0x7500 },
/* B/G A2 */ { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
0x5000, 0x0000, 0x0003, 0x7500 },
/* B/G NICAM */ { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
0x5000, 0x0000, 0x0008, 0x7500 },
/* I Mono */ { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
0x7900, 0x0000, 0x000A, 0x7500 },
/* I NICAM */ { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
0x7900, 0x0000, 0x000A, 0x7500 },
/* D/K Mono */ { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
0x5000, 0x0000, 0x0004, 0x7500 },
/* D/K A2-1 */ { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
0x5000, 0x0000, 0x0004, 0x7500 },
/* D/K A2-2 */ { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
0x5000, 0x0000, 0x0005, 0x7500 },
/* D/K A2-3 */ { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
0x5000, 0x0000, 0x0007, 0x7500 },
/* D/K NICAM */ { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
0x5000, 0x0000, 0x000B, 0x7500 },
/* L/L' Mono */ { AUD_MONO, 0x0003, 0x0200, 0x0100, 0x7C03,
0x5000, 0x2200, 0x0009, 0x7500 },
/* L/L' NICAM */{ AUD_NICAM_L, 0x0003, 0x0120, 0x0100, 0x7C03,
0x5000, 0x0000, 0x0009, 0x7500 },
};
#define MPX_NUM_MODES ARRAY_SIZE(mpx_audio_modes)
static int mpx_setup(struct sony_btf_mpx *t)
{
struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
u16 source = 0;
u8 buffer[3];
struct i2c_msg msg;
int mode = t->mpxmode;
/* reset MPX */
buffer[0] = 0x00;
buffer[1] = 0x80;
buffer[2] = 0x00;
msg.addr = client->addr;
msg.flags = 0;
msg.len = 3;
msg.buf = buffer;
i2c_transfer(client->adapter, &msg, 1);
buffer[1] = 0x00;
i2c_transfer(client->adapter, &msg, 1);
if (t->audmode != V4L2_TUNER_MODE_MONO)
mode++;
if (mpx_audio_modes[mode].audio_mode != AUD_MONO) {
switch (t->audmode) {
case V4L2_TUNER_MODE_MONO:
switch (mpx_audio_modes[mode].audio_mode) {
case AUD_A2:
source = mpx_audio_modes[mode].source;
break;
case AUD_NICAM:
source = 0x0000;
break;
case AUD_NICAM_L:
source = 0x0200;
break;
default:
break;
}
break;
case V4L2_TUNER_MODE_STEREO:
source = mpx_audio_modes[mode].source;
break;
case V4L2_TUNER_MODE_LANG1:
source = 0x0300;
break;
case V4L2_TUNER_MODE_LANG2:
source = 0x0400;
break;
}
source |= mpx_audio_modes[mode].source & 0x00ff;
} else
source = mpx_audio_modes[mode].source;
mpx_write(client, 0x10, 0x0030, mpx_audio_modes[mode].modus);
mpx_write(client, 0x12, 0x0008, source);
mpx_write(client, 0x12, 0x0013, mpx_audio_modes[mode].acb);
mpx_write(client, 0x12, 0x000e,
mpx_audio_modes[mode].fm_prescale);
mpx_write(client, 0x12, 0x0010,
mpx_audio_modes[mode].nicam_prescale);
mpx_write(client, 0x12, 0x000d,
mpx_audio_modes[mode].scart_prescale);
mpx_write(client, 0x10, 0x0020, mpx_audio_modes[mode].system);
mpx_write(client, 0x12, 0x0000, mpx_audio_modes[mode].volume);
if (mpx_audio_modes[mode].audio_mode == AUD_A2)
mpx_write(client, 0x10, 0x0022,
t->audmode == V4L2_TUNER_MODE_MONO ? 0x07f0 : 0x0190);
#ifdef MPX_DEBUG
{
u8 buf1[3], buf2[2];
struct i2c_msg msgs[2];
v4l2_info(client,
"MPX registers: %04x %04x %04x %04x %04x %04x %04x %04x\n",
mpx_audio_modes[mode].modus,
source,
mpx_audio_modes[mode].acb,
mpx_audio_modes[mode].fm_prescale,
mpx_audio_modes[mode].nicam_prescale,
mpx_audio_modes[mode].scart_prescale,
mpx_audio_modes[mode].system,
mpx_audio_modes[mode].volume);
buf1[0] = 0x11;
buf1[1] = 0x00;
buf1[2] = 0x7e;
msgs[0].addr = client->addr;
msgs[0].flags = 0;
msgs[0].len = 3;
msgs[0].buf = buf1;
msgs[1].addr = client->addr;
msgs[1].flags = I2C_M_RD;
msgs[1].len = 2;
msgs[1].buf = buf2;
i2c_transfer(client->adapter, msgs, 2);
v4l2_info(client, "MPX system: %02x%02x\n",
buf2[0], buf2[1]);
buf1[0] = 0x11;
buf1[1] = 0x02;
buf1[2] = 0x00;
i2c_transfer(client->adapter, msgs, 2);
v4l2_info(client, "MPX status: %02x%02x\n",
buf2[0], buf2[1]);
}
#endif
return 0;
}
static int sony_btf_mpx_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct sony_btf_mpx *t = to_state(sd);
int default_mpx_mode = 0;
if (std & V4L2_STD_PAL_BG)
default_mpx_mode = 1;
else if (std & V4L2_STD_PAL_I)
default_mpx_mode = 4;
else if (std & V4L2_STD_PAL_DK)
default_mpx_mode = 6;
else if (std & V4L2_STD_SECAM_L)
default_mpx_mode = 11;
if (default_mpx_mode != t->mpxmode) {
t->mpxmode = default_mpx_mode;
mpx_setup(t);
}
return 0;
}
static int sony_btf_mpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct sony_btf_mpx *t = to_state(sd);
vt->capability = V4L2_TUNER_CAP_NORM |
V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 |
V4L2_TUNER_CAP_LANG2;
vt->rxsubchans = V4L2_TUNER_SUB_MONO |
V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_LANG1 |
V4L2_TUNER_SUB_LANG2;
vt->audmode = t->audmode;
return 0;
}
static int sony_btf_mpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
{
struct sony_btf_mpx *t = to_state(sd);
if (vt->type != V4L2_TUNER_ANALOG_TV)
return -EINVAL;
if (vt->audmode != t->audmode) {
t->audmode = vt->audmode;
mpx_setup(t);
}
return 0;
}
/* --------------------------------------------------------------------------*/
static const struct v4l2_subdev_tuner_ops sony_btf_mpx_tuner_ops = {
.s_tuner = sony_btf_mpx_s_tuner,
.g_tuner = sony_btf_mpx_g_tuner,
};
static const struct v4l2_subdev_video_ops sony_btf_mpx_video_ops = {
.s_std = sony_btf_mpx_s_std,
};
static const struct v4l2_subdev_ops sony_btf_mpx_ops = {
.tuner = &sony_btf_mpx_tuner_ops,
.video = &sony_btf_mpx_video_ops,
};
/* --------------------------------------------------------------------------*/
static int sony_btf_mpx_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct sony_btf_mpx *t;
struct v4l2_subdev *sd;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
return -ENODEV;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
t = devm_kzalloc(&client->dev, sizeof(*t), GFP_KERNEL);
if (t == NULL)
return -ENOMEM;
sd = &t->sd;
v4l2_i2c_subdev_init(sd, client, &sony_btf_mpx_ops);
/* Initialize sony_btf_mpx */
t->mpxmode = 0;
t->audmode = V4L2_TUNER_MODE_STEREO;
return 0;
}
static void sony_btf_mpx_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
v4l2_device_unregister_subdev(sd);
}
/* ----------------------------------------------------------------------- */
static const struct i2c_device_id sony_btf_mpx_id[] = {
{ "sony-btf-mpx", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, sony_btf_mpx_id);
static struct i2c_driver sony_btf_mpx_driver = {
.driver = {
.name = "sony-btf-mpx",
},
.probe = sony_btf_mpx_probe,
.remove = sony_btf_mpx_remove,
.id_table = sony_btf_mpx_id,
};
module_i2c_driver(sony_btf_mpx_driver);
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