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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 bt866 - BT866 Digital Video Encoder (Rockwell Part)4 5 Copyright (C) 1999 Mike Bernson <mike@mlb.org>6 Copyright (C) 1998 Dave Perks <dperks@ibm.net>7 8 Modifications for LML33/DC10plus unified driver9 Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>10 11 This code was modify/ported from the saa7111 driver written12 by Dave Perks.13 14 This code was adapted for the bt866 by Christer Weinigel and ported15 to 2.6 by Martin Samuelsson.16 17*/18 19#include <linux/module.h>20#include <linux/types.h>21#include <linux/slab.h>22#include <linux/ioctl.h>23#include <linux/uaccess.h>24#include <linux/i2c.h>25#include <linux/videodev2.h>26#include <media/v4l2-device.h>27 28MODULE_DESCRIPTION("Brooktree-866 video encoder driver");29MODULE_AUTHOR("Mike Bernson & Dave Perks");30MODULE_LICENSE("GPL");31 32static int debug;33module_param(debug, int, 0);34MODULE_PARM_DESC(debug, "Debug level (0-1)");35 36 37/* ----------------------------------------------------------------------- */38 39struct bt866 {40 struct v4l2_subdev sd;41 u8 reg[256];42};43 44static inline struct bt866 *to_bt866(struct v4l2_subdev *sd)45{46 return container_of(sd, struct bt866, sd);47}48 49static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data)50{51 struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd);52 u8 buffer[2];53 int err;54 55 buffer[0] = subaddr;56 buffer[1] = data;57 58 encoder->reg[subaddr] = data;59 60 v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data);61 62 for (err = 0; err < 3;) {63 if (i2c_master_send(client, buffer, 2) == 2)64 break;65 err++;66 v4l_warn(client, "error #%d writing to 0x%02x\n",67 err, subaddr);68 schedule_timeout_interruptible(msecs_to_jiffies(100));69 }70 if (err == 3) {71 v4l_warn(client, "giving up\n");72 return -1;73 }74 75 return 0;76}77 78static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)79{80 v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);81 82 /* Only PAL supported by this driver at the moment! */83 if (!(std & V4L2_STD_NTSC))84 return -EINVAL;85 return 0;86}87 88static int bt866_s_routing(struct v4l2_subdev *sd,89 u32 input, u32 output, u32 config)90{91 static const __u8 init[] = {92 0xc8, 0xcc, /* CRSCALE */93 0xca, 0x91, /* CBSCALE */94 0xcc, 0x24, /* YC16 | OSDNUM */95 0xda, 0x00, /* */96 0xdc, 0x24, /* SETMODE | PAL */97 0xde, 0x02, /* EACTIVE */98 99 /* overlay colors */100 0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */101 0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */102 0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */103 0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */104 0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */105 0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */106 0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */107 0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */108 109 0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */110 0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */111 0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */112 0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */113 0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */114 0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */115 0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */116 0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */117 };118 struct bt866 *encoder = to_bt866(sd);119 u8 val;120 int i;121 122 for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2)123 bt866_write(encoder, init[i], init[i+1]);124 125 val = encoder->reg[0xdc];126 127 if (input == 0)128 val |= 0x40; /* CBSWAP */129 else130 val &= ~0x40; /* !CBSWAP */131 132 bt866_write(encoder, 0xdc, val);133 134 val = encoder->reg[0xcc];135 if (input == 2)136 val |= 0x01; /* OSDBAR */137 else138 val &= ~0x01; /* !OSDBAR */139 bt866_write(encoder, 0xcc, val);140 141 v4l2_dbg(1, debug, sd, "set input %d\n", input);142 143 switch (input) {144 case 0:145 case 1:146 case 2:147 break;148 default:149 return -EINVAL;150 }151 return 0;152}153 154#if 0155/* Code to setup square pixels, might be of some use in the future,156 but is currently unused. */157 val = encoder->reg[0xdc];158 if (*iarg)159 val |= 1; /* SQUARE */160 else161 val &= ~1; /* !SQUARE */162 bt866_write(client, 0xdc, val);163#endif164 165/* ----------------------------------------------------------------------- */166 167static const struct v4l2_subdev_video_ops bt866_video_ops = {168 .s_std_output = bt866_s_std_output,169 .s_routing = bt866_s_routing,170};171 172static const struct v4l2_subdev_ops bt866_ops = {173 .video = &bt866_video_ops,174};175 176static int bt866_probe(struct i2c_client *client)177{178 struct bt866 *encoder;179 struct v4l2_subdev *sd;180 181 v4l_info(client, "chip found @ 0x%x (%s)\n",182 client->addr << 1, client->adapter->name);183 184 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);185 if (encoder == NULL)186 return -ENOMEM;187 sd = &encoder->sd;188 v4l2_i2c_subdev_init(sd, client, &bt866_ops);189 return 0;190}191 192static void bt866_remove(struct i2c_client *client)193{194 struct v4l2_subdev *sd = i2c_get_clientdata(client);195 196 v4l2_device_unregister_subdev(sd);197}198 199static const struct i2c_device_id bt866_id[] = {200 { "bt866" },201 { }202};203MODULE_DEVICE_TABLE(i2c, bt866_id);204 205static struct i2c_driver bt866_driver = {206 .driver = {207 .name = "bt866",208 },209 .probe = bt866_probe,210 .remove = bt866_remove,211 .id_table = bt866_id,212};213 214module_i2c_driver(bt866_driver);215