iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
0a1533e3e6
linux/drivers/media/i2c/saa7185.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

353 lines
9.0 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* saa7185 - Philips SAA7185B video encoder driver version 0.0.3
*
* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
*
* Slight changes for video timing and attachment output by
* Wolfgang Scherr <scherr@net4you.net>
*
* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
* - moved over to linux>=2.4.x i2c protocol (1/1/2003)
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/ioctl.h>
#include <linux/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
MODULE_AUTHOR("Dave Perks");
MODULE_LICENSE("GPL");
static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
/* ----------------------------------------------------------------------- */
struct saa7185 {
struct v4l2_subdev sd;
unsigned char reg[128];
v4l2_std_id norm;
};
static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
{
return container_of(sd, struct saa7185, sd);
}
/* ----------------------------------------------------------------------- */
static inline int saa7185_read(struct v4l2_subdev *sd)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_read_byte(client);
}
static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct saa7185 *encoder = to_saa7185(sd);
v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
encoder->reg[reg] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static int saa7185_write_block(struct v4l2_subdev *sd,
const u8 *data, unsigned int len)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct saa7185 *encoder = to_saa7185(sd);
int ret = -1;
u8 reg;
/* the adv7175 has an autoincrement function, use it if
* the adapter understands raw I2C */
if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
/* do raw I2C, not smbus compatible */
u8 block_data[32];
int block_len;
while (len >= 2) {
block_len = 0;
block_data[block_len++] = reg = data[0];
do {
block_data[block_len++] =
encoder->reg[reg++] = data[1];
len -= 2;
data += 2;
} while (len >= 2 && data[0] == reg && block_len < 32);
ret = i2c_master_send(client, block_data, block_len);
if (ret < 0)
break;
}
} else {
/* do some slow I2C emulation kind of thing */
while (len >= 2) {
reg = *data++;
ret = saa7185_write(sd, reg, *data++);
if (ret < 0)
break;
len -= 2;
}
}
return ret;
}
/* ----------------------------------------------------------------------- */
static const unsigned char init_common[] = {
0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,
* YUV2C=1, MY2C=1, MUV2C=1 */
0x42, 0x6b, /* OVLY0=107 */
0x43, 0x00, /* OVLU0=0 white */
0x44, 0x00, /* OVLV0=0 */
0x45, 0x22, /* OVLY1=34 */
0x46, 0xac, /* OVLU1=172 yellow */
0x47, 0x0e, /* OVLV1=14 */
0x48, 0x03, /* OVLY2=3 */
0x49, 0x1d, /* OVLU2=29 cyan */
0x4a, 0xac, /* OVLV2=172 */
0x4b, 0xf0, /* OVLY3=240 */
0x4c, 0xc8, /* OVLU3=200 green */
0x4d, 0xb9, /* OVLV3=185 */
0x4e, 0xd4, /* OVLY4=212 */
0x4f, 0x38, /* OVLU4=56 magenta */
0x50, 0x47, /* OVLV4=71 */
0x51, 0xc1, /* OVLY5=193 */
0x52, 0xe3, /* OVLU5=227 red */
0x53, 0x54, /* OVLV5=84 */
0x54, 0xa3, /* OVLY6=163 */
0x55, 0x54, /* OVLU6=84 blue */
0x56, 0xf2, /* OVLV6=242 */
0x57, 0x90, /* OVLY7=144 */
0x58, 0x00, /* OVLU7=0 black */
0x59, 0x00, /* OVLV7=0 */
0x5a, 0x00, /* CHPS=0 */
0x5b, 0x76, /* GAINU=118 */
0x5c, 0xa5, /* GAINV=165 */
0x5d, 0x3c, /* BLCKL=60 */
0x5e, 0x3a, /* BLNNL=58 */
0x5f, 0x3a, /* CCRS=0, BLNVB=58 */
0x60, 0x00, /* NULL */
/* 0x61 - 0x66 set according to norm */
0x67, 0x00, /* 0 : caption 1st byte odd field */
0x68, 0x00, /* 0 : caption 2nd byte odd field */
0x69, 0x00, /* 0 : caption 1st byte even field */
0x6a, 0x00, /* 0 : caption 2nd byte even field */
0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */
0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
* CBLF=0, ORCV2=0, PRCV2=0 */
0x6d, 0x00, /* SRCM1=0, CCEN=0 */
0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at
* least for PAL */
0x6f, 0x00, /* HTRIG upper bits */
0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */
/* The following should not be needed */
0x71, 0x15, /* BMRQ=0x115 */
0x72, 0x90, /* EMRQ=0x690 */
0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */
0x74, 0x00, /* NULL */
0x75, 0x00, /* NULL */
0x76, 0x00, /* NULL */
0x77, 0x15, /* BRCV=0x115 */
0x78, 0x90, /* ERCV=0x690 */
0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */
/* Field length controls */
0x7a, 0x70, /* FLC=0 */
/* The following should not be needed if SBLN = 1 */
0x7b, 0x16, /* FAL=22 */
0x7c, 0x35, /* LAL=244 */
0x7d, 0x20, /* LAL=244, FAL=22 */
};
static const unsigned char init_pal[] = {
0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,
* YGS=1, INPI=0, DOWN=0 */
0x62, 0xc8, /* DECTYP=1, BSTA=72 */
0x63, 0xcb, /* FSC0 */
0x64, 0x8a, /* FSC1 */
0x65, 0x09, /* FSC2 */
0x66, 0x2a, /* FSC3 */
};
static const unsigned char init_ntsc[] = {
0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,
* YGS=1, INPI=0, DOWN=0 */
0x62, 0xe6, /* DECTYP=1, BSTA=102 */
0x63, 0x1f, /* FSC0 */
0x64, 0x7c, /* FSC1 */
0x65, 0xf0, /* FSC2 */
0x66, 0x21, /* FSC3 */
};
static int saa7185_init(struct v4l2_subdev *sd, u32 val)
{
struct saa7185 *encoder = to_saa7185(sd);
saa7185_write_block(sd, init_common, sizeof(init_common));
if (encoder->norm & V4L2_STD_NTSC)
saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
else
saa7185_write_block(sd, init_pal, sizeof(init_pal));
return 0;
}
static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct saa7185 *encoder = to_saa7185(sd);
if (std & V4L2_STD_NTSC)
saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
else if (std & V4L2_STD_PAL)
saa7185_write_block(sd, init_pal, sizeof(init_pal));
else
return -EINVAL;
encoder->norm = std;
return 0;
}
static int saa7185_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct saa7185 *encoder = to_saa7185(sd);
/* RJ: input = 0: input is from SA7111
input = 1: input is from ZR36060 */
switch (input) {
case 0:
/* turn off colorbar */
saa7185_write(sd, 0x3a, 0x0f);
/* Switch RTCE to 1 */
saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
saa7185_write(sd, 0x6e, 0x01);
break;
case 1:
/* turn off colorbar */
saa7185_write(sd, 0x3a, 0x0f);
/* Switch RTCE to 0 */
saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
/* SW: a slight sync problem... */
saa7185_write(sd, 0x6e, 0x00);
break;
case 2:
/* turn on colorbar */
saa7185_write(sd, 0x3a, 0x8f);
/* Switch RTCE to 0 */
saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
/* SW: a slight sync problem... */
saa7185_write(sd, 0x6e, 0x01);
break;
default:
return -EINVAL;
}
return 0;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_subdev_core_ops saa7185_core_ops = {
.init = saa7185_init,
};
static const struct v4l2_subdev_video_ops saa7185_video_ops = {
.s_std_output = saa7185_s_std_output,
.s_routing = saa7185_s_routing,
};
static const struct v4l2_subdev_ops saa7185_ops = {
.core = &saa7185_core_ops,
.video = &saa7185_video_ops,
};
/* ----------------------------------------------------------------------- */
static int saa7185_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int i;
struct saa7185 *encoder;
struct v4l2_subdev *sd;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
v4l_info(client, "chip found @ 0x%x (%s)\n",
client->addr << 1, client->adapter->name);
encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
if (encoder == NULL)
return -ENOMEM;
encoder->norm = V4L2_STD_NTSC;
sd = &encoder->sd;
v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
i = saa7185_write_block(sd, init_common, sizeof(init_common));
if (i >= 0)
i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
if (i < 0)
v4l2_dbg(1, debug, sd, "init error %d\n", i);
else
v4l2_dbg(1, debug, sd, "revision 0x%x\n",
saa7185_read(sd) >> 5);
return 0;
}
static void saa7185_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct saa7185 *encoder = to_saa7185(sd);
v4l2_device_unregister_subdev(sd);
/* SW: output off is active */
saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
}
/* ----------------------------------------------------------------------- */
static const struct i2c_device_id saa7185_id[] = {
{ "saa7185", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, saa7185_id);
static struct i2c_driver saa7185_driver = {
.driver = {
.name = "saa7185",
},
.probe = saa7185_probe,
.remove = saa7185_remove,
.id_table = saa7185_id,
};
module_i2c_driver(saa7185_driver);
Reference in New Issue View Git Blame Copy Permalink