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ed5c2f5fd1
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>
452 lines
11 KiB
C
452 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* adv7175 - adv7175a video encoder driver version 0.0.3
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*
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* Copyright (C) 1998 Dave Perks <dperks@ibm.net>
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* Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
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* Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
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* - some corrections for Pinnacle Systems Inc. DC10plus card.
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*
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* Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
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* - moved over to linux>=2.4.x i2c protocol (9/9/2002)
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/ioctl.h>
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#include <linux/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
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MODULE_AUTHOR("Dave Perks");
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MODULE_LICENSE("GPL");
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#define I2C_ADV7175 0xd4
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#define I2C_ADV7176 0x54
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static int debug;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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/* ----------------------------------------------------------------------- */
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struct adv7175 {
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struct v4l2_subdev sd;
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v4l2_std_id norm;
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int input;
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};
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static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct adv7175, sd);
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}
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static char *inputs[] = { "pass_through", "play_back", "color_bar" };
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static u32 adv7175_codes[] = {
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MEDIA_BUS_FMT_UYVY8_2X8,
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MEDIA_BUS_FMT_UYVY8_1X16,
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};
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/* ----------------------------------------------------------------------- */
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static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int adv7175_write_block(struct v4l2_subdev *sd,
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const u8 *data, unsigned int len)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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int ret = -1;
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u8 reg;
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/* the adv7175 has an autoincrement function, use it if
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* the adapter understands raw I2C */
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if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
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/* do raw I2C, not smbus compatible */
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u8 block_data[32];
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int block_len;
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while (len >= 2) {
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block_len = 0;
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block_data[block_len++] = reg = data[0];
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do {
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block_data[block_len++] = data[1];
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reg++;
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len -= 2;
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data += 2;
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} while (len >= 2 && data[0] == reg && block_len < 32);
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ret = i2c_master_send(client, block_data, block_len);
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if (ret < 0)
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break;
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}
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} else {
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/* do some slow I2C emulation kind of thing */
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while (len >= 2) {
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reg = *data++;
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ret = adv7175_write(sd, reg, *data++);
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if (ret < 0)
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break;
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len -= 2;
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}
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}
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return ret;
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}
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static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
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{
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/* for some reason pass_through NTSC needs
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* a different sub-carrier freq to remain stable. */
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if (pass_through)
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adv7175_write(sd, 0x02, 0x00);
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else
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adv7175_write(sd, 0x02, 0x55);
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adv7175_write(sd, 0x03, 0x55);
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adv7175_write(sd, 0x04, 0x55);
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adv7175_write(sd, 0x05, 0x25);
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}
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/* ----------------------------------------------------------------------- */
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/* Output filter: S-Video Composite */
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#define MR050 0x11 /* 0x09 */
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#define MR060 0x14 /* 0x0c */
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/* ----------------------------------------------------------------------- */
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#define TR0MODE 0x46
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#define TR0RST 0x80
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#define TR1CAPT 0x80
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#define TR1PLAY 0x00
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static const unsigned char init_common[] = {
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0x00, MR050, /* MR0, PAL enabled */
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0x01, 0x00, /* MR1 */
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0x02, 0x0c, /* subc. freq. */
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0x03, 0x8c, /* subc. freq. */
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0x04, 0x79, /* subc. freq. */
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0x05, 0x26, /* subc. freq. */
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0x06, 0x40, /* subc. phase */
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0x07, TR0MODE, /* TR0, 16bit */
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0x08, 0x21, /* */
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0x09, 0x00, /* */
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0x0a, 0x00, /* */
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0x0b, 0x00, /* */
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0x0c, TR1CAPT, /* TR1 */
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0x0d, 0x4f, /* MR2 */
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0x0e, 0x00, /* */
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0x0f, 0x00, /* */
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0x10, 0x00, /* */
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0x11, 0x00, /* */
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};
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static const unsigned char init_pal[] = {
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0x00, MR050, /* MR0, PAL enabled */
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0x01, 0x00, /* MR1 */
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0x02, 0x0c, /* subc. freq. */
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0x03, 0x8c, /* subc. freq. */
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0x04, 0x79, /* subc. freq. */
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0x05, 0x26, /* subc. freq. */
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0x06, 0x40, /* subc. phase */
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};
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static const unsigned char init_ntsc[] = {
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0x00, MR060, /* MR0, NTSC enabled */
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0x01, 0x00, /* MR1 */
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0x02, 0x55, /* subc. freq. */
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0x03, 0x55, /* subc. freq. */
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0x04, 0x55, /* subc. freq. */
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0x05, 0x25, /* subc. freq. */
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0x06, 0x1a, /* subc. phase */
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};
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static int adv7175_init(struct v4l2_subdev *sd, u32 val)
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{
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/* This is just for testing!!! */
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adv7175_write_block(sd, init_common, sizeof(init_common));
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adv7175_write(sd, 0x07, TR0MODE | TR0RST);
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adv7175_write(sd, 0x07, TR0MODE);
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return 0;
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}
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static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
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{
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struct adv7175 *encoder = to_adv7175(sd);
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if (std & V4L2_STD_NTSC) {
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adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
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if (encoder->input == 0)
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adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
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adv7175_write(sd, 0x07, TR0MODE | TR0RST);
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adv7175_write(sd, 0x07, TR0MODE);
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} else if (std & V4L2_STD_PAL) {
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adv7175_write_block(sd, init_pal, sizeof(init_pal));
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if (encoder->input == 0)
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adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
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adv7175_write(sd, 0x07, TR0MODE | TR0RST);
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adv7175_write(sd, 0x07, TR0MODE);
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} else if (std & V4L2_STD_SECAM) {
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/* This is an attempt to convert
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* SECAM->PAL (typically it does not work
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* due to genlock: when decoder is in SECAM
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* and encoder in in PAL the subcarrier can
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* not be synchronized with horizontal
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* quency) */
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adv7175_write_block(sd, init_pal, sizeof(init_pal));
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if (encoder->input == 0)
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adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
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adv7175_write(sd, 0x07, TR0MODE | TR0RST);
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adv7175_write(sd, 0x07, TR0MODE);
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} else {
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v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
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(unsigned long long)std);
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return -EINVAL;
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}
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v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
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encoder->norm = std;
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return 0;
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}
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static int adv7175_s_routing(struct v4l2_subdev *sd,
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u32 input, u32 output, u32 config)
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{
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struct adv7175 *encoder = to_adv7175(sd);
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/* RJ: input = 0: input is from decoder
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input = 1: input is from ZR36060
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input = 2: color bar */
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switch (input) {
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case 0:
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adv7175_write(sd, 0x01, 0x00);
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if (encoder->norm & V4L2_STD_NTSC)
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set_subcarrier_freq(sd, 1);
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adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */
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if (encoder->norm & V4L2_STD_SECAM)
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adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */
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else
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adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */
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adv7175_write(sd, 0x07, TR0MODE | TR0RST);
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adv7175_write(sd, 0x07, TR0MODE);
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/*udelay(10);*/
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break;
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case 1:
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adv7175_write(sd, 0x01, 0x00);
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if (encoder->norm & V4L2_STD_NTSC)
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set_subcarrier_freq(sd, 0);
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adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */
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adv7175_write(sd, 0x0d, 0x49);
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adv7175_write(sd, 0x07, TR0MODE | TR0RST);
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adv7175_write(sd, 0x07, TR0MODE);
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/* udelay(10); */
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break;
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case 2:
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adv7175_write(sd, 0x01, 0x80);
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if (encoder->norm & V4L2_STD_NTSC)
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set_subcarrier_freq(sd, 0);
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adv7175_write(sd, 0x0d, 0x49);
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adv7175_write(sd, 0x07, TR0MODE | TR0RST);
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adv7175_write(sd, 0x07, TR0MODE);
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/* udelay(10); */
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break;
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default:
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v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
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return -EINVAL;
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}
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v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
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encoder->input = input;
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return 0;
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}
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static int adv7175_enum_mbus_code(struct v4l2_subdev *sd,
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struct v4l2_subdev_state *sd_state,
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struct v4l2_subdev_mbus_code_enum *code)
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{
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if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes))
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return -EINVAL;
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code->code = adv7175_codes[code->index];
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return 0;
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}
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static int adv7175_get_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_state *sd_state,
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struct v4l2_subdev_format *format)
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{
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struct v4l2_mbus_framefmt *mf = &format->format;
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u8 val = adv7175_read(sd, 0x7);
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if (format->pad)
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return -EINVAL;
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if ((val & 0x40) == (1 << 6))
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mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
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else
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mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
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mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
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mf->width = 0;
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mf->height = 0;
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mf->field = V4L2_FIELD_ANY;
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return 0;
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}
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static int adv7175_set_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_state *sd_state,
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struct v4l2_subdev_format *format)
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{
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struct v4l2_mbus_framefmt *mf = &format->format;
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u8 val = adv7175_read(sd, 0x7);
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int ret = 0;
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if (format->pad)
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return -EINVAL;
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switch (mf->code) {
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case MEDIA_BUS_FMT_UYVY8_2X8:
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val &= ~0x40;
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break;
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case MEDIA_BUS_FMT_UYVY8_1X16:
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val |= 0x40;
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break;
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default:
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v4l2_dbg(1, debug, sd,
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"illegal v4l2_mbus_framefmt code: %d\n", mf->code);
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return -EINVAL;
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}
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if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
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ret = adv7175_write(sd, 0x7, val);
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return ret;
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}
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static int adv7175_s_power(struct v4l2_subdev *sd, int on)
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{
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if (on)
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adv7175_write(sd, 0x01, 0x00);
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else
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adv7175_write(sd, 0x01, 0x78);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_core_ops adv7175_core_ops = {
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.init = adv7175_init,
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.s_power = adv7175_s_power,
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};
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static const struct v4l2_subdev_video_ops adv7175_video_ops = {
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.s_std_output = adv7175_s_std_output,
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.s_routing = adv7175_s_routing,
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};
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static const struct v4l2_subdev_pad_ops adv7175_pad_ops = {
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.enum_mbus_code = adv7175_enum_mbus_code,
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.get_fmt = adv7175_get_fmt,
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.set_fmt = adv7175_set_fmt,
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};
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static const struct v4l2_subdev_ops adv7175_ops = {
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.core = &adv7175_core_ops,
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.video = &adv7175_video_ops,
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.pad = &adv7175_pad_ops,
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};
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/* ----------------------------------------------------------------------- */
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static int adv7175_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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int i;
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struct adv7175 *encoder;
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struct v4l2_subdev *sd;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -ENODEV;
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
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if (encoder == NULL)
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return -ENOMEM;
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sd = &encoder->sd;
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v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
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encoder->norm = V4L2_STD_NTSC;
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encoder->input = 0;
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i = adv7175_write_block(sd, init_common, sizeof(init_common));
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if (i >= 0) {
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i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
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i = adv7175_write(sd, 0x07, TR0MODE);
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i = adv7175_read(sd, 0x12);
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v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
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}
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if (i < 0)
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v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
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return 0;
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}
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static void adv7175_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
|
|
v4l2_device_unregister_subdev(sd);
|
|
}
|
|
|
|
/* ----------------------------------------------------------------------- */
|
|
|
|
static const struct i2c_device_id adv7175_id[] = {
|
|
{ "adv7175", 0 },
|
|
{ "adv7176", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, adv7175_id);
|
|
|
|
static struct i2c_driver adv7175_driver = {
|
|
.driver = {
|
|
.name = "adv7175",
|
|
},
|
|
.probe = adv7175_probe,
|
|
.remove = adv7175_remove,
|
|
.id_table = adv7175_id,
|
|
};
|
|
|
|
module_i2c_driver(adv7175_driver);
|