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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.14 *5 * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>6 */7 8#include <linux/module.h>9#include <linux/init.h>10#include <linux/delay.h>11#include <linux/types.h>12#include <linux/slab.h>13#include <linux/uaccess.h>14#include <linux/i2c.h>15#include <linux/videodev2.h>16#include <media/v4l2-device.h>17#include <media/v4l2-ctrls.h>18 19MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");20MODULE_AUTHOR("Laurent Pinchart");21MODULE_LICENSE("GPL");22 23static int debug;24module_param(debug, int, 0);25MODULE_PARM_DESC(debug, "Debug level (0-1)");26 27 28#define VPX_TIMEOUT_COUNT 1029 30/* ----------------------------------------------------------------------- */31 32struct vpx3220 {33 struct v4l2_subdev sd;34 struct v4l2_ctrl_handler hdl;35 unsigned char reg[255];36 37 v4l2_std_id norm;38 int input;39 int enable;40};41 42static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd)43{44 return container_of(sd, struct vpx3220, sd);45}46 47static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)48{49 return &container_of(ctrl->handler, struct vpx3220, hdl)->sd;50}51 52static char *inputs[] = { "internal", "composite", "svideo" };53 54/* ----------------------------------------------------------------------- */55 56static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value)57{58 struct i2c_client *client = v4l2_get_subdevdata(sd);59 struct vpx3220 *decoder = i2c_get_clientdata(client);60 61 decoder->reg[reg] = value;62 return i2c_smbus_write_byte_data(client, reg, value);63}64 65static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg)66{67 struct i2c_client *client = v4l2_get_subdevdata(sd);68 69 return i2c_smbus_read_byte_data(client, reg);70}71 72static int vpx3220_fp_status(struct v4l2_subdev *sd)73{74 unsigned char status;75 unsigned int i;76 77 for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {78 status = vpx3220_read(sd, 0x29);79 80 if (!(status & 4))81 return 0;82 83 udelay(10);84 85 if (need_resched())86 cond_resched();87 }88 89 return -1;90}91 92static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data)93{94 struct i2c_client *client = v4l2_get_subdevdata(sd);95 96 /* Write the 16-bit address to the FPWR register */97 if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {98 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);99 return -1;100 }101 102 if (vpx3220_fp_status(sd) < 0)103 return -1;104 105 /* Write the 16-bit data to the FPDAT register */106 if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {107 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);108 return -1;109 }110 111 return 0;112}113 114static int vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr)115{116 struct i2c_client *client = v4l2_get_subdevdata(sd);117 s16 data;118 119 /* Write the 16-bit address to the FPRD register */120 if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {121 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);122 return -1;123 }124 125 if (vpx3220_fp_status(sd) < 0)126 return -1;127 128 /* Read the 16-bit data from the FPDAT register */129 data = i2c_smbus_read_word_data(client, 0x28);130 if (data == -1) {131 v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);132 return -1;133 }134 135 return swab16(data);136}137 138static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)139{140 u8 reg;141 int ret = -1;142 143 while (len >= 2) {144 reg = *data++;145 ret = vpx3220_write(sd, reg, *data++);146 if (ret < 0)147 break;148 len -= 2;149 }150 151 return ret;152}153 154static int vpx3220_write_fp_block(struct v4l2_subdev *sd,155 const u16 *data, unsigned int len)156{157 u8 reg;158 int ret = 0;159 160 while (len > 1) {161 reg = *data++;162 ret |= vpx3220_fp_write(sd, reg, *data++);163 len -= 2;164 }165 166 return ret;167}168 169/* ---------------------------------------------------------------------- */170 171static const unsigned short init_ntsc[] = {172 0x1c, 0x00, /* NTSC tint angle */173 0x88, 17, /* Window 1 vertical */174 0x89, 240, /* Vertical lines in */175 0x8a, 240, /* Vertical lines out */176 0x8b, 000, /* Horizontal begin */177 0x8c, 640, /* Horizontal length */178 0x8d, 640, /* Number of pixels */179 0x8f, 0xc00, /* Disable window 2 */180 0xf0, 0x73, /* 13.5 MHz transport, Forced181 * mode, latch windows */182 0xf2, 0x13, /* NTSC M, composite input */183 0xe7, 0x1e1, /* Enable vertical standard184 * locking @ 240 lines */185};186 187static const unsigned short init_pal[] = {188 0x88, 23, /* Window 1 vertical begin */189 0x89, 288, /* Vertical lines in (16 lines190 * skipped by the VFE) */191 0x8a, 288, /* Vertical lines out (16 lines192 * skipped by the VFE) */193 0x8b, 16, /* Horizontal begin */194 0x8c, 768, /* Horizontal length */195 0x8d, 784, /* Number of pixels196 * Must be >= Horizontal begin + Horizontal length */197 0x8f, 0xc00, /* Disable window 2 */198 0xf0, 0x77, /* 13.5 MHz transport, Forced199 * mode, latch windows */200 0xf2, 0x3d1, /* PAL B,G,H,I, composite input */201 0xe7, 0x241, /* PAL/SECAM set to 288 lines */202};203 204static const unsigned short init_secam[] = {205 0x88, 23, /* Window 1 vertical begin */206 0x89, 288, /* Vertical lines in (16 lines207 * skipped by the VFE) */208 0x8a, 288, /* Vertical lines out (16 lines209 * skipped by the VFE) */210 0x8b, 16, /* Horizontal begin */211 0x8c, 768, /* Horizontal length */212 0x8d, 784, /* Number of pixels213 * Must be >= Horizontal begin + Horizontal length */214 0x8f, 0xc00, /* Disable window 2 */215 0xf0, 0x77, /* 13.5 MHz transport, Forced216 * mode, latch windows */217 0xf2, 0x3d5, /* SECAM, composite input */218 0xe7, 0x241, /* PAL/SECAM set to 288 lines */219};220 221static const unsigned char init_common[] = {222 0xf2, 0x00, /* Disable all outputs */223 0x33, 0x0d, /* Luma : VIN2, Chroma : CIN224 * (clamp off) */225 0xd8, 0xa8, /* HREF/VREF active high, VREF226 * pulse = 2, Odd/Even flag */227 0x20, 0x03, /* IF compensation 0dB/oct */228 0xe0, 0xff, /* Open up all comparators */229 0xe1, 0x00,230 0xe2, 0x7f,231 0xe3, 0x80,232 0xe4, 0x7f,233 0xe5, 0x80,234 0xe6, 0x00, /* Brightness set to 0 */235 0xe7, 0xe0, /* Contrast to 1.0, noise shaping236 * 10 to 8 2-bit error diffusion */237 0xe8, 0xf8, /* YUV422, CbCr binary offset,238 * ... (p.32) */239 0xea, 0x18, /* LLC2 connected, output FIFO240 * reset with VACTintern */241 0xf0, 0x8a, /* Half full level to 10, bus242 * shuffler [7:0, 23:16, 15:8] */243 0xf1, 0x18, /* Single clock, sync mode, no244 * FE delay, no HLEN counter */245 0xf8, 0x12, /* Port A, PIXCLK, HF# & FE#246 * strength to 2 */247 0xf9, 0x24, /* Port B, HREF, VREF, PREF &248 * ALPHA strength to 4 */249};250 251static const unsigned short init_fp[] = {252 0x59, 0,253 0xa0, 2070, /* ACC reference */254 0xa3, 0,255 0xa4, 0,256 0xa8, 30,257 0xb2, 768,258 0xbe, 27,259 0x58, 0,260 0x26, 0,261 0x4b, 0x298, /* PLL gain */262};263 264 265static int vpx3220_init(struct v4l2_subdev *sd, u32 val)266{267 struct vpx3220 *decoder = to_vpx3220(sd);268 269 vpx3220_write_block(sd, init_common, sizeof(init_common));270 vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);271 if (decoder->norm & V4L2_STD_NTSC)272 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);273 else if (decoder->norm & V4L2_STD_PAL)274 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);275 else if (decoder->norm & V4L2_STD_SECAM)276 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);277 else278 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);279 return 0;280}281 282static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)283{284 int res = V4L2_IN_ST_NO_SIGNAL, status;285 v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;286 287 status = vpx3220_fp_read(sd, 0x0f3);288 289 v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status);290 291 if (status < 0)292 return status;293 294 if ((status & 0x20) == 0) {295 res = 0;296 297 switch (status & 0x18) {298 case 0x00:299 case 0x10:300 case 0x14:301 case 0x18:302 std &= V4L2_STD_PAL;303 break;304 305 case 0x08:306 std &= V4L2_STD_SECAM;307 break;308 309 case 0x04:310 case 0x0c:311 case 0x1c:312 std &= V4L2_STD_NTSC;313 break;314 }315 } else {316 std = V4L2_STD_UNKNOWN;317 }318 if (pstd)319 *pstd = std;320 if (pstatus)321 *pstatus = res;322 return 0;323}324 325static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)326{327 v4l2_dbg(1, debug, sd, "querystd\n");328 return vpx3220_status(sd, NULL, std);329}330 331static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status)332{333 v4l2_dbg(1, debug, sd, "g_input_status\n");334 return vpx3220_status(sd, status, NULL);335}336 337static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std)338{339 struct vpx3220 *decoder = to_vpx3220(sd);340 int temp_input;341 342 /* Here we back up the input selection because it gets343 overwritten when we fill the registers with the344 chosen video norm */345 temp_input = vpx3220_fp_read(sd, 0xf2);346 347 v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std);348 if (std & V4L2_STD_NTSC) {349 vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);350 v4l2_dbg(1, debug, sd, "norm switched to NTSC\n");351 } else if (std & V4L2_STD_PAL) {352 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);353 v4l2_dbg(1, debug, sd, "norm switched to PAL\n");354 } else if (std & V4L2_STD_SECAM) {355 vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);356 v4l2_dbg(1, debug, sd, "norm switched to SECAM\n");357 } else {358 return -EINVAL;359 }360 361 decoder->norm = std;362 363 /* And here we set the backed up video input again */364 vpx3220_fp_write(sd, 0xf2, temp_input | 0x0010);365 udelay(10);366 return 0;367}368 369static int vpx3220_s_routing(struct v4l2_subdev *sd,370 u32 input, u32 output, u32 config)371{372 int data;373 374 /* RJ: input = 0: ST8 (PCTV) input375 input = 1: COMPOSITE input376 input = 2: SVHS input */377 378 static const int input_vals[3][2] = {379 {0x0c, 0},380 {0x0d, 0},381 {0x0e, 1}382 };383 384 if (input > 2)385 return -EINVAL;386 387 v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[input]);388 389 vpx3220_write(sd, 0x33, input_vals[input][0]);390 391 data = vpx3220_fp_read(sd, 0xf2) & ~(0x0020);392 if (data < 0)393 return data;394 /* 0x0010 is required to latch the setting */395 vpx3220_fp_write(sd, 0xf2,396 data | (input_vals[input][1] << 5) | 0x0010);397 398 udelay(10);399 return 0;400}401 402static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable)403{404 v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off");405 406 vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00));407 return 0;408}409 410static int vpx3220_s_ctrl(struct v4l2_ctrl *ctrl)411{412 struct v4l2_subdev *sd = to_sd(ctrl);413 414 switch (ctrl->id) {415 case V4L2_CID_BRIGHTNESS:416 vpx3220_write(sd, 0xe6, ctrl->val);417 return 0;418 case V4L2_CID_CONTRAST:419 /* Bit 7 and 8 is for noise shaping */420 vpx3220_write(sd, 0xe7, ctrl->val + 192);421 return 0;422 case V4L2_CID_SATURATION:423 vpx3220_fp_write(sd, 0xa0, ctrl->val);424 return 0;425 case V4L2_CID_HUE:426 vpx3220_fp_write(sd, 0x1c, ctrl->val);427 return 0;428 }429 return -EINVAL;430}431 432/* ----------------------------------------------------------------------- */433 434static const struct v4l2_ctrl_ops vpx3220_ctrl_ops = {435 .s_ctrl = vpx3220_s_ctrl,436};437 438static const struct v4l2_subdev_core_ops vpx3220_core_ops = {439 .init = vpx3220_init,440};441 442static const struct v4l2_subdev_video_ops vpx3220_video_ops = {443 .s_std = vpx3220_s_std,444 .s_routing = vpx3220_s_routing,445 .s_stream = vpx3220_s_stream,446 .querystd = vpx3220_querystd,447 .g_input_status = vpx3220_g_input_status,448};449 450static const struct v4l2_subdev_ops vpx3220_ops = {451 .core = &vpx3220_core_ops,452 .video = &vpx3220_video_ops,453};454 455/* -----------------------------------------------------------------------456 * Client management code457 */458 459static int vpx3220_probe(struct i2c_client *client)460{461 struct vpx3220 *decoder;462 struct v4l2_subdev *sd;463 const char *name = NULL;464 u8 ver;465 u16 pn;466 467 /* Check if the adapter supports the needed features */468 if (!i2c_check_functionality(client->adapter,469 I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))470 return -ENODEV;471 472 decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);473 if (decoder == NULL)474 return -ENOMEM;475 sd = &decoder->sd;476 v4l2_i2c_subdev_init(sd, client, &vpx3220_ops);477 decoder->norm = V4L2_STD_PAL;478 decoder->input = 0;479 decoder->enable = 1;480 v4l2_ctrl_handler_init(&decoder->hdl, 4);481 v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,482 V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);483 v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,484 V4L2_CID_CONTRAST, 0, 63, 1, 32);485 v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,486 V4L2_CID_SATURATION, 0, 4095, 1, 2048);487 v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,488 V4L2_CID_HUE, -512, 511, 1, 0);489 sd->ctrl_handler = &decoder->hdl;490 if (decoder->hdl.error) {491 int err = decoder->hdl.error;492 493 v4l2_ctrl_handler_free(&decoder->hdl);494 return err;495 }496 v4l2_ctrl_handler_setup(&decoder->hdl);497 498 ver = i2c_smbus_read_byte_data(client, 0x00);499 pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +500 i2c_smbus_read_byte_data(client, 0x01);501 if (ver == 0xec) {502 switch (pn) {503 case 0x4680:504 name = "vpx3220a";505 break;506 case 0x4260:507 name = "vpx3216b";508 break;509 case 0x4280:510 name = "vpx3214c";511 break;512 }513 }514 if (name)515 v4l2_info(sd, "%s found @ 0x%x (%s)\n", name,516 client->addr << 1, client->adapter->name);517 else518 v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n",519 ver, pn, client->addr << 1, client->adapter->name);520 521 vpx3220_write_block(sd, init_common, sizeof(init_common));522 vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);523 /* Default to PAL */524 vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);525 return 0;526}527 528static void vpx3220_remove(struct i2c_client *client)529{530 struct v4l2_subdev *sd = i2c_get_clientdata(client);531 struct vpx3220 *decoder = to_vpx3220(sd);532 533 v4l2_device_unregister_subdev(sd);534 v4l2_ctrl_handler_free(&decoder->hdl);535}536 537static const struct i2c_device_id vpx3220_id[] = {538 { "vpx3220a" },539 { "vpx3216b" },540 { "vpx3214c" },541 { }542};543MODULE_DEVICE_TABLE(i2c, vpx3220_id);544 545static struct i2c_driver vpx3220_driver = {546 .driver = {547 .name = "vpx3220",548 },549 .probe = vpx3220_probe,550 .remove = vpx3220_remove,551 .id_table = vpx3220_id,552};553 554module_i2c_driver(vpx3220_driver);555