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5f98e5f555
Simplifies return value logic of adv7170_set_fmt(). Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
406 lines
10 KiB
C
406 lines
10 KiB
C
/*
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* adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
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*
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* Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
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*
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* Based on adv7176 driver by:
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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 (1/1/2003)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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 ADV7170 video encoder driver");
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MODULE_AUTHOR("Maxim Yevtyushkin");
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MODULE_LICENSE("GPL");
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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 adv7170 {
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struct v4l2_subdev sd;
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unsigned char reg[128];
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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 adv7170 *to_adv7170(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct adv7170, sd);
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}
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static char *inputs[] = { "pass_through", "play_back" };
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static u32 adv7170_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 adv7170_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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struct adv7170 *encoder = to_adv7170(sd);
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encoder->reg[reg] = value;
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static inline int adv7170_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 adv7170_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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struct adv7170 *encoder = to_adv7170(sd);
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int ret = -1;
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u8 reg;
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/* the adv7170 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++] =
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encoder->reg[reg++] = data[1];
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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 = adv7170_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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/* ----------------------------------------------------------------------- */
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#define TR0MODE 0x4c
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#define TR0RST 0x80
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#define TR1CAPT 0x00
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#define TR1PLAY 0x00
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static const unsigned char init_NTSC[] = {
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0x00, 0x10, /* MR0 */
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0x01, 0x20, /* MR1 */
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0x02, 0x0e, /* MR2 RTC control: bits 2 and 1 */
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0x03, 0x80, /* MR3 */
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0x04, 0x30, /* MR4 */
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0x05, 0x00, /* Reserved */
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0x06, 0x00, /* Reserved */
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0x07, TR0MODE, /* TM0 */
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0x08, TR1CAPT, /* TM1 */
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0x09, 0x16, /* Fsc0 */
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0x0a, 0x7c, /* Fsc1 */
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0x0b, 0xf0, /* Fsc2 */
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0x0c, 0x21, /* Fsc3 */
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0x0d, 0x00, /* Subcarrier Phase */
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0x0e, 0x00, /* Closed Capt. Ext 0 */
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0x0f, 0x00, /* Closed Capt. Ext 1 */
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0x10, 0x00, /* Closed Capt. 0 */
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0x11, 0x00, /* Closed Capt. 1 */
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0x12, 0x00, /* Pedestal Ctl 0 */
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0x13, 0x00, /* Pedestal Ctl 1 */
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0x14, 0x00, /* Pedestal Ctl 2 */
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0x15, 0x00, /* Pedestal Ctl 3 */
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0x16, 0x00, /* CGMS_WSS_0 */
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0x17, 0x00, /* CGMS_WSS_1 */
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0x18, 0x00, /* CGMS_WSS_2 */
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0x19, 0x00, /* Teletext Ctl */
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};
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static const unsigned char init_PAL[] = {
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0x00, 0x71, /* MR0 */
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0x01, 0x20, /* MR1 */
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0x02, 0x0e, /* MR2 RTC control: bits 2 and 1 */
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0x03, 0x80, /* MR3 */
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0x04, 0x30, /* MR4 */
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0x05, 0x00, /* Reserved */
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0x06, 0x00, /* Reserved */
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0x07, TR0MODE, /* TM0 */
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0x08, TR1CAPT, /* TM1 */
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0x09, 0xcb, /* Fsc0 */
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0x0a, 0x8a, /* Fsc1 */
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0x0b, 0x09, /* Fsc2 */
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0x0c, 0x2a, /* Fsc3 */
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0x0d, 0x00, /* Subcarrier Phase */
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0x0e, 0x00, /* Closed Capt. Ext 0 */
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0x0f, 0x00, /* Closed Capt. Ext 1 */
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0x10, 0x00, /* Closed Capt. 0 */
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0x11, 0x00, /* Closed Capt. 1 */
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0x12, 0x00, /* Pedestal Ctl 0 */
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0x13, 0x00, /* Pedestal Ctl 1 */
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0x14, 0x00, /* Pedestal Ctl 2 */
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0x15, 0x00, /* Pedestal Ctl 3 */
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0x16, 0x00, /* CGMS_WSS_0 */
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0x17, 0x00, /* CGMS_WSS_1 */
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0x18, 0x00, /* CGMS_WSS_2 */
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0x19, 0x00, /* Teletext Ctl */
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};
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static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
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{
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struct adv7170 *encoder = to_adv7170(sd);
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v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
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if (std & V4L2_STD_NTSC) {
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adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
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if (encoder->input == 0)
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adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */
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adv7170_write(sd, 0x07, TR0MODE | TR0RST);
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adv7170_write(sd, 0x07, TR0MODE);
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} else if (std & V4L2_STD_PAL) {
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adv7170_write_block(sd, init_PAL, sizeof(init_PAL));
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if (encoder->input == 0)
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adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */
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adv7170_write(sd, 0x07, TR0MODE | TR0RST);
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adv7170_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 adv7170_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 adv7170 *encoder = to_adv7170(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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v4l2_dbg(1, debug, sd, "set input from %s\n",
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input == 0 ? "decoder" : "ZR36060");
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switch (input) {
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case 0:
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adv7170_write(sd, 0x01, 0x20);
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adv7170_write(sd, 0x08, TR1CAPT); /* TR1 */
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adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */
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adv7170_write(sd, 0x07, TR0MODE | TR0RST);
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adv7170_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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adv7170_write(sd, 0x01, 0x00);
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adv7170_write(sd, 0x08, TR1PLAY); /* TR1 */
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adv7170_write(sd, 0x02, 0x08);
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adv7170_write(sd, 0x07, TR0MODE | TR0RST);
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adv7170_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 adv7170_enum_mbus_code(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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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(adv7170_codes))
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return -EINVAL;
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code->code = adv7170_codes[code->index];
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return 0;
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}
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static int adv7170_get_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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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 = adv7170_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 adv7170_set_fmt(struct v4l2_subdev *sd,
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struct v4l2_subdev_pad_config *cfg,
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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 = adv7170_read(sd, 0x7);
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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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return adv7170_write(sd, 0x7, val);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_subdev_video_ops adv7170_video_ops = {
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.s_std_output = adv7170_s_std_output,
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.s_routing = adv7170_s_routing,
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};
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static const struct v4l2_subdev_pad_ops adv7170_pad_ops = {
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.enum_mbus_code = adv7170_enum_mbus_code,
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.get_fmt = adv7170_get_fmt,
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.set_fmt = adv7170_set_fmt,
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};
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static const struct v4l2_subdev_ops adv7170_ops = {
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.video = &adv7170_video_ops,
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.pad = &adv7170_pad_ops,
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};
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/* ----------------------------------------------------------------------- */
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static int adv7170_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct adv7170 *encoder;
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struct v4l2_subdev *sd;
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int i;
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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, &adv7170_ops);
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encoder->norm = V4L2_STD_NTSC;
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encoder->input = 0;
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i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
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if (i >= 0) {
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i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);
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i = adv7170_write(sd, 0x07, TR0MODE);
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i = adv7170_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 int adv7170_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct i2c_device_id adv7170_id[] = {
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{ "adv7170", 0 },
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{ "adv7171", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adv7170_id);
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static struct i2c_driver adv7170_driver = {
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.driver = {
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.name = "adv7170",
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},
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.probe = adv7170_probe,
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.remove = adv7170_remove,
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.id_table = adv7170_id,
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};
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module_i2c_driver(adv7170_driver);
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