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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * saa7185 - Philips SAA7185B video encoder driver version 0.0.34 *5 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>6 *7 * Slight changes for video timing and attachment output by8 * Wolfgang Scherr <scherr@net4you.net>9 *10 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>11 * - moved over to linux>=2.4.x i2c protocol (1/1/2003)12 */13 14#include <linux/module.h>15#include <linux/types.h>16#include <linux/slab.h>17#include <linux/ioctl.h>18#include <linux/uaccess.h>19#include <linux/i2c.h>20#include <linux/videodev2.h>21#include <media/v4l2-device.h>22 23MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");24MODULE_AUTHOR("Dave Perks");25MODULE_LICENSE("GPL");26 27static int debug;28module_param(debug, int, 0);29MODULE_PARM_DESC(debug, "Debug level (0-1)");30 31 32/* ----------------------------------------------------------------------- */33 34struct saa7185 {35 struct v4l2_subdev sd;36 unsigned char reg[128];37 38 v4l2_std_id norm;39};40 41static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)42{43 return container_of(sd, struct saa7185, sd);44}45 46/* ----------------------------------------------------------------------- */47 48static inline int saa7185_read(struct v4l2_subdev *sd)49{50 struct i2c_client *client = v4l2_get_subdevdata(sd);51 52 return i2c_smbus_read_byte(client);53}54 55static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)56{57 struct i2c_client *client = v4l2_get_subdevdata(sd);58 struct saa7185 *encoder = to_saa7185(sd);59 60 v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);61 encoder->reg[reg] = value;62 return i2c_smbus_write_byte_data(client, reg, value);63}64 65static int saa7185_write_block(struct v4l2_subdev *sd,66 const u8 *data, unsigned int len)67{68 struct i2c_client *client = v4l2_get_subdevdata(sd);69 struct saa7185 *encoder = to_saa7185(sd);70 int ret = -1;71 u8 reg;72 73 /* the adv7175 has an autoincrement function, use it if74 * the adapter understands raw I2C */75 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {76 /* do raw I2C, not smbus compatible */77 u8 block_data[32];78 int block_len;79 80 while (len >= 2) {81 block_len = 0;82 block_data[block_len++] = reg = data[0];83 do {84 block_data[block_len++] =85 encoder->reg[reg++] = data[1];86 len -= 2;87 data += 2;88 } while (len >= 2 && data[0] == reg && block_len < 32);89 ret = i2c_master_send(client, block_data, block_len);90 if (ret < 0)91 break;92 }93 } else {94 /* do some slow I2C emulation kind of thing */95 while (len >= 2) {96 reg = *data++;97 ret = saa7185_write(sd, reg, *data++);98 if (ret < 0)99 break;100 len -= 2;101 }102 }103 104 return ret;105}106 107/* ----------------------------------------------------------------------- */108 109static const unsigned char init_common[] = {110 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1,111 * YUV2C=1, MY2C=1, MUV2C=1 */112 113 0x42, 0x6b, /* OVLY0=107 */114 0x43, 0x00, /* OVLU0=0 white */115 0x44, 0x00, /* OVLV0=0 */116 0x45, 0x22, /* OVLY1=34 */117 0x46, 0xac, /* OVLU1=172 yellow */118 0x47, 0x0e, /* OVLV1=14 */119 0x48, 0x03, /* OVLY2=3 */120 0x49, 0x1d, /* OVLU2=29 cyan */121 0x4a, 0xac, /* OVLV2=172 */122 0x4b, 0xf0, /* OVLY3=240 */123 0x4c, 0xc8, /* OVLU3=200 green */124 0x4d, 0xb9, /* OVLV3=185 */125 0x4e, 0xd4, /* OVLY4=212 */126 0x4f, 0x38, /* OVLU4=56 magenta */127 0x50, 0x47, /* OVLV4=71 */128 0x51, 0xc1, /* OVLY5=193 */129 0x52, 0xe3, /* OVLU5=227 red */130 0x53, 0x54, /* OVLV5=84 */131 0x54, 0xa3, /* OVLY6=163 */132 0x55, 0x54, /* OVLU6=84 blue */133 0x56, 0xf2, /* OVLV6=242 */134 0x57, 0x90, /* OVLY7=144 */135 0x58, 0x00, /* OVLU7=0 black */136 0x59, 0x00, /* OVLV7=0 */137 138 0x5a, 0x00, /* CHPS=0 */139 0x5b, 0x76, /* GAINU=118 */140 0x5c, 0xa5, /* GAINV=165 */141 0x5d, 0x3c, /* BLCKL=60 */142 0x5e, 0x3a, /* BLNNL=58 */143 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */144 0x60, 0x00, /* NULL */145 146 /* 0x61 - 0x66 set according to norm */147 148 0x67, 0x00, /* 0 : caption 1st byte odd field */149 0x68, 0x00, /* 0 : caption 2nd byte odd field */150 0x69, 0x00, /* 0 : caption 1st byte even field */151 0x6a, 0x00, /* 0 : caption 2nd byte even field */152 153 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */154 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,155 * CBLF=0, ORCV2=0, PRCV2=0 */156 0x6d, 0x00, /* SRCM1=0, CCEN=0 */157 158 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at159 * least for PAL */160 0x6f, 0x00, /* HTRIG upper bits */161 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */162 163 /* The following should not be needed */164 165 0x71, 0x15, /* BMRQ=0x115 */166 0x72, 0x90, /* EMRQ=0x690 */167 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */168 0x74, 0x00, /* NULL */169 0x75, 0x00, /* NULL */170 0x76, 0x00, /* NULL */171 0x77, 0x15, /* BRCV=0x115 */172 0x78, 0x90, /* ERCV=0x690 */173 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */174 175 /* Field length controls */176 177 0x7a, 0x70, /* FLC=0 */178 179 /* The following should not be needed if SBLN = 1 */180 181 0x7b, 0x16, /* FAL=22 */182 0x7c, 0x35, /* LAL=244 */183 0x7d, 0x20, /* LAL=244, FAL=22 */184};185 186static const unsigned char init_pal[] = {187 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1,188 * YGS=1, INPI=0, DOWN=0 */189 0x62, 0xc8, /* DECTYP=1, BSTA=72 */190 0x63, 0xcb, /* FSC0 */191 0x64, 0x8a, /* FSC1 */192 0x65, 0x09, /* FSC2 */193 0x66, 0x2a, /* FSC3 */194};195 196static const unsigned char init_ntsc[] = {197 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1,198 * YGS=1, INPI=0, DOWN=0 */199 0x62, 0xe6, /* DECTYP=1, BSTA=102 */200 0x63, 0x1f, /* FSC0 */201 0x64, 0x7c, /* FSC1 */202 0x65, 0xf0, /* FSC2 */203 0x66, 0x21, /* FSC3 */204};205 206 207static int saa7185_init(struct v4l2_subdev *sd, u32 val)208{209 struct saa7185 *encoder = to_saa7185(sd);210 211 saa7185_write_block(sd, init_common, sizeof(init_common));212 if (encoder->norm & V4L2_STD_NTSC)213 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));214 else215 saa7185_write_block(sd, init_pal, sizeof(init_pal));216 return 0;217}218 219static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)220{221 struct saa7185 *encoder = to_saa7185(sd);222 223 if (std & V4L2_STD_NTSC)224 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));225 else if (std & V4L2_STD_PAL)226 saa7185_write_block(sd, init_pal, sizeof(init_pal));227 else228 return -EINVAL;229 encoder->norm = std;230 return 0;231}232 233static int saa7185_s_routing(struct v4l2_subdev *sd,234 u32 input, u32 output, u32 config)235{236 struct saa7185 *encoder = to_saa7185(sd);237 238 /* RJ: input = 0: input is from SA7111239 input = 1: input is from ZR36060 */240 241 switch (input) {242 case 0:243 /* turn off colorbar */244 saa7185_write(sd, 0x3a, 0x0f);245 /* Switch RTCE to 1 */246 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);247 saa7185_write(sd, 0x6e, 0x01);248 break;249 250 case 1:251 /* turn off colorbar */252 saa7185_write(sd, 0x3a, 0x0f);253 /* Switch RTCE to 0 */254 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);255 /* SW: a slight sync problem... */256 saa7185_write(sd, 0x6e, 0x00);257 break;258 259 case 2:260 /* turn on colorbar */261 saa7185_write(sd, 0x3a, 0x8f);262 /* Switch RTCE to 0 */263 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);264 /* SW: a slight sync problem... */265 saa7185_write(sd, 0x6e, 0x01);266 break;267 268 default:269 return -EINVAL;270 }271 return 0;272}273 274/* ----------------------------------------------------------------------- */275 276static const struct v4l2_subdev_core_ops saa7185_core_ops = {277 .init = saa7185_init,278};279 280static const struct v4l2_subdev_video_ops saa7185_video_ops = {281 .s_std_output = saa7185_s_std_output,282 .s_routing = saa7185_s_routing,283};284 285static const struct v4l2_subdev_ops saa7185_ops = {286 .core = &saa7185_core_ops,287 .video = &saa7185_video_ops,288};289 290 291/* ----------------------------------------------------------------------- */292 293static int saa7185_probe(struct i2c_client *client)294{295 int i;296 struct saa7185 *encoder;297 struct v4l2_subdev *sd;298 299 /* Check if the adapter supports the needed features */300 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))301 return -ENODEV;302 303 v4l_info(client, "chip found @ 0x%x (%s)\n",304 client->addr << 1, client->adapter->name);305 306 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);307 if (encoder == NULL)308 return -ENOMEM;309 encoder->norm = V4L2_STD_NTSC;310 sd = &encoder->sd;311 v4l2_i2c_subdev_init(sd, client, &saa7185_ops);312 313 i = saa7185_write_block(sd, init_common, sizeof(init_common));314 if (i >= 0)315 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));316 if (i < 0)317 v4l2_dbg(1, debug, sd, "init error %d\n", i);318 else319 v4l2_dbg(1, debug, sd, "revision 0x%x\n",320 saa7185_read(sd) >> 5);321 return 0;322}323 324static void saa7185_remove(struct i2c_client *client)325{326 struct v4l2_subdev *sd = i2c_get_clientdata(client);327 struct saa7185 *encoder = to_saa7185(sd);328 329 v4l2_device_unregister_subdev(sd);330 /* SW: output off is active */331 saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);332}333 334/* ----------------------------------------------------------------------- */335 336static const struct i2c_device_id saa7185_id[] = {337 { "saa7185" },338 { }339};340MODULE_DEVICE_TABLE(i2c, saa7185_id);341 342static struct i2c_driver saa7185_driver = {343 .driver = {344 .name = "saa7185",345 },346 .probe = saa7185_probe,347 .remove = saa7185_remove,348 .id_table = saa7185_id,349};350 351module_i2c_driver(saa7185_driver);352