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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 | // SPDX-License-Identifier: GPL-2.0-or-later /* bt866 - BT866 Digital Video Encoder (Rockwell Part) Copyright (C) 1999 Mike Bernson <mike@mlb.org> Copyright (C) 1998 Dave Perks <dperks@ibm.net> Modifications for LML33/DC10plus unified driver Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> This code was modify/ported from the saa7111 driver written by Dave Perks. This code was adapted for the bt866 by Christer Weinigel and ported to 2.6 by Martin Samuelsson. */ #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("Brooktree-866 video encoder driver"); MODULE_AUTHOR("Mike Bernson & Dave Perks"); MODULE_LICENSE("GPL"); static int debug; module_param(debug, int, 0); MODULE_PARM_DESC(debug, "Debug level (0-1)"); /* ----------------------------------------------------------------------- */ struct bt866 { struct v4l2_subdev sd; u8 reg[256]; }; static inline struct bt866 *to_bt866(struct v4l2_subdev *sd) { return container_of(sd, struct bt866, sd); } static int bt866_write(struct bt866 *encoder, u8 subaddr, u8 data) { struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd); u8 buffer[2]; int err; buffer[0] = subaddr; buffer[1] = data; encoder->reg[subaddr] = data; v4l_dbg(1, debug, client, "write 0x%02x = 0x%02x\n", subaddr, data); for (err = 0; err < 3;) { if (i2c_master_send(client, buffer, 2) == 2) break; err++; v4l_warn(client, "error #%d writing to 0x%02x\n", err, subaddr); schedule_timeout_interruptible(msecs_to_jiffies(100)); } if (err == 3) { v4l_warn(client, "giving up\n"); return -1; } return 0; } static int bt866_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) { v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); /* Only PAL supported by this driver at the moment! */ if (!(std & V4L2_STD_NTSC)) return -EINVAL; return 0; } static int bt866_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config) { static const __u8 init[] = { 0xc8, 0xcc, /* CRSCALE */ 0xca, 0x91, /* CBSCALE */ 0xcc, 0x24, /* YC16 | OSDNUM */ 0xda, 0x00, /* */ 0xdc, 0x24, /* SETMODE | PAL */ 0xde, 0x02, /* EACTIVE */ /* overlay colors */ 0x70, 0xEB, 0x90, 0x80, 0xB0, 0x80, /* white */ 0x72, 0xA2, 0x92, 0x8E, 0xB2, 0x2C, /* yellow */ 0x74, 0x83, 0x94, 0x2C, 0xB4, 0x9C, /* cyan */ 0x76, 0x70, 0x96, 0x3A, 0xB6, 0x48, /* green */ 0x78, 0x54, 0x98, 0xC6, 0xB8, 0xB8, /* magenta */ 0x7A, 0x41, 0x9A, 0xD4, 0xBA, 0x64, /* red */ 0x7C, 0x23, 0x9C, 0x72, 0xBC, 0xD4, /* blue */ 0x7E, 0x10, 0x9E, 0x80, 0xBE, 0x80, /* black */ 0x60, 0xEB, 0x80, 0x80, 0xc0, 0x80, /* white */ 0x62, 0xA2, 0x82, 0x8E, 0xc2, 0x2C, /* yellow */ 0x64, 0x83, 0x84, 0x2C, 0xc4, 0x9C, /* cyan */ 0x66, 0x70, 0x86, 0x3A, 0xc6, 0x48, /* green */ 0x68, 0x54, 0x88, 0xC6, 0xc8, 0xB8, /* magenta */ 0x6A, 0x41, 0x8A, 0xD4, 0xcA, 0x64, /* red */ 0x6C, 0x23, 0x8C, 0x72, 0xcC, 0xD4, /* blue */ 0x6E, 0x10, 0x8E, 0x80, 0xcE, 0x80, /* black */ }; struct bt866 *encoder = to_bt866(sd); u8 val; int i; for (i = 0; i < ARRAY_SIZE(init) / 2; i += 2) bt866_write(encoder, init[i], init[i+1]); val = encoder->reg[0xdc]; if (input == 0) val |= 0x40; /* CBSWAP */ else val &= ~0x40; /* !CBSWAP */ bt866_write(encoder, 0xdc, val); val = encoder->reg[0xcc]; if (input == 2) val |= 0x01; /* OSDBAR */ else val &= ~0x01; /* !OSDBAR */ bt866_write(encoder, 0xcc, val); v4l2_dbg(1, debug, sd, "set input %d\n", input); switch (input) { case 0: case 1: case 2: break; default: return -EINVAL; } return 0; } #if 0 /* Code to setup square pixels, might be of some use in the future, but is currently unused. */ val = encoder->reg[0xdc]; if (*iarg) val |= 1; /* SQUARE */ else val &= ~1; /* !SQUARE */ bt866_write(client, 0xdc, val); #endif /* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_video_ops bt866_video_ops = { .s_std_output = bt866_s_std_output, .s_routing = bt866_s_routing, }; static const struct v4l2_subdev_ops bt866_ops = { .video = &bt866_video_ops, }; static int bt866_probe(struct i2c_client *client) { struct bt866 *encoder; struct v4l2_subdev *sd; 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; sd = &encoder->sd; v4l2_i2c_subdev_init(sd, client, &bt866_ops); return 0; } static void bt866_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); v4l2_device_unregister_subdev(sd); } static const struct i2c_device_id bt866_id[] = { { "bt866", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, bt866_id); static struct i2c_driver bt866_driver = { .driver = { .name = "bt866", }, .probe_new = bt866_probe, .remove = bt866_remove, .id_table = bt866_id, }; module_i2c_driver(bt866_driver); |