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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher4 * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland5 * Copyright (c) 2002, 2003 Tuukka Toivonen6 * Copyright (c) 2008 Erik Andrén7 * Copyright (c) 2008 Chia-I Wu8 *9 * P/N 861037: Sensor HDCS1000 ASIC STV060010 * P/N 861050-0010: Sensor HDCS1000 ASIC STV060011 * P/N 861050-0020: Sensor Photobit PB100 ASIC STV0600-1 - QuickCam Express12 * P/N 861055: Sensor ST VV6410 ASIC STV0610 - LEGO cam13 * P/N 861075-0040: Sensor HDCS1000 ASIC14 * P/N 961179-0700: Sensor ST VV6410 ASIC STV0602 - Dexxa WebCam USB15 * P/N 861040-0000: Sensor ST VV6410 ASIC STV0610 - QuickCam Web16 */17 18#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt19 20#include "stv06xx_hdcs.h"21 22static struct v4l2_pix_format hdcs1x00_mode[] = {23 {24 HDCS_1X00_DEF_WIDTH,25 HDCS_1X00_DEF_HEIGHT,26 V4L2_PIX_FMT_SGRBG8,27 V4L2_FIELD_NONE,28 .sizeimage =29 HDCS_1X00_DEF_WIDTH * HDCS_1X00_DEF_HEIGHT,30 .bytesperline = HDCS_1X00_DEF_WIDTH,31 .colorspace = V4L2_COLORSPACE_SRGB,32 .priv = 133 }34};35 36static struct v4l2_pix_format hdcs1020_mode[] = {37 {38 HDCS_1020_DEF_WIDTH,39 HDCS_1020_DEF_HEIGHT,40 V4L2_PIX_FMT_SGRBG8,41 V4L2_FIELD_NONE,42 .sizeimage =43 HDCS_1020_DEF_WIDTH * HDCS_1020_DEF_HEIGHT,44 .bytesperline = HDCS_1020_DEF_WIDTH,45 .colorspace = V4L2_COLORSPACE_SRGB,46 .priv = 147 }48};49 50enum hdcs_power_state {51 HDCS_STATE_SLEEP,52 HDCS_STATE_IDLE,53 HDCS_STATE_RUN54};55 56/* no lock? */57struct hdcs {58 enum hdcs_power_state state;59 int w, h;60 61 /* visible area of the sensor array */62 struct {63 int left, top;64 int width, height;65 int border;66 } array;67 68 struct {69 /* Column timing overhead */70 u8 cto;71 /* Column processing overhead */72 u8 cpo;73 /* Row sample period constant */74 u16 rs;75 /* Exposure reset duration */76 u16 er;77 } exp;78 79 int psmp;80};81 82static int hdcs_reg_write_seq(struct sd *sd, u8 reg, u8 *vals, u8 len)83{84 u8 regs[I2C_MAX_BYTES * 2];85 int i;86 87 if (unlikely((len <= 0) || (len >= I2C_MAX_BYTES) ||88 (reg + len > 0xff)))89 return -EINVAL;90 91 for (i = 0; i < len; i++) {92 regs[2 * i] = reg;93 regs[2 * i + 1] = vals[i];94 /* All addresses are shifted left one bit95 * as bit 0 toggles r/w */96 reg += 2;97 }98 99 return stv06xx_write_sensor_bytes(sd, regs, len);100}101 102static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state)103{104 struct hdcs *hdcs = sd->sensor_priv;105 u8 val;106 int ret;107 108 if (hdcs->state == state)109 return 0;110 111 /* we need to go idle before running or sleeping */112 if (hdcs->state != HDCS_STATE_IDLE) {113 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);114 if (ret)115 return ret;116 }117 118 hdcs->state = HDCS_STATE_IDLE;119 120 if (state == HDCS_STATE_IDLE)121 return 0;122 123 switch (state) {124 case HDCS_STATE_SLEEP:125 val = HDCS_SLEEP_MODE;126 break;127 128 case HDCS_STATE_RUN:129 val = HDCS_RUN_ENABLE;130 break;131 132 default:133 return -EINVAL;134 }135 136 ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val);137 138 /* Update the state if the write succeeded */139 if (!ret)140 hdcs->state = state;141 142 return ret;143}144 145static int hdcs_reset(struct sd *sd)146{147 struct hdcs *hdcs = sd->sensor_priv;148 int err;149 150 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1);151 if (err < 0)152 return err;153 154 err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);155 if (err < 0)156 hdcs->state = HDCS_STATE_IDLE;157 158 return err;159}160 161static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)162{163 struct sd *sd = (struct sd *) gspca_dev;164 struct hdcs *hdcs = sd->sensor_priv;165 int rowexp, srowexp;166 int max_srowexp;167 /* Column time period */168 int ct;169 /* Column processing period */170 int cp;171 /* Row processing period */172 int rp;173 /* Minimum number of column timing periods174 within the column processing period */175 int mnct;176 int cycles, err;177 u8 exp[14];178 179 cycles = val * HDCS_CLK_FREQ_MHZ * 257;180 181 ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);182 cp = hdcs->exp.cto + (hdcs->w * ct / 2);183 184 /* the cycles one row takes */185 rp = hdcs->exp.rs + cp;186 187 rowexp = cycles / rp;188 189 /* the remaining cycles */190 cycles -= rowexp * rp;191 192 /* calculate sub-row exposure */193 if (IS_1020(sd)) {194 /* see HDCS-1020 datasheet 3.5.6.4, p. 63 */195 srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct;196 197 mnct = (hdcs->exp.er + 12 + ct - 1) / ct;198 max_srowexp = hdcs->w - mnct;199 } else {200 /* see HDCS-1000 datasheet 3.4.5.5, p. 61 */201 srowexp = cp - hdcs->exp.er - 6 - cycles;202 203 mnct = (hdcs->exp.er + 5 + ct - 1) / ct;204 max_srowexp = cp - mnct * ct - 1;205 }206 207 if (srowexp < 0)208 srowexp = 0;209 else if (srowexp > max_srowexp)210 srowexp = max_srowexp;211 212 if (IS_1020(sd)) {213 exp[0] = HDCS20_CONTROL;214 exp[1] = 0x00; /* Stop streaming */215 exp[2] = HDCS_ROWEXPL;216 exp[3] = rowexp & 0xff;217 exp[4] = HDCS_ROWEXPH;218 exp[5] = rowexp >> 8;219 exp[6] = HDCS20_SROWEXP;220 exp[7] = (srowexp >> 2) & 0xff;221 exp[8] = HDCS20_ERROR;222 exp[9] = 0x10; /* Clear exposure error flag*/223 exp[10] = HDCS20_CONTROL;224 exp[11] = 0x04; /* Restart streaming */225 err = stv06xx_write_sensor_bytes(sd, exp, 6);226 } else {227 exp[0] = HDCS00_CONTROL;228 exp[1] = 0x00; /* Stop streaming */229 exp[2] = HDCS_ROWEXPL;230 exp[3] = rowexp & 0xff;231 exp[4] = HDCS_ROWEXPH;232 exp[5] = rowexp >> 8;233 exp[6] = HDCS00_SROWEXPL;234 exp[7] = srowexp & 0xff;235 exp[8] = HDCS00_SROWEXPH;236 exp[9] = srowexp >> 8;237 exp[10] = HDCS_STATUS;238 exp[11] = 0x10; /* Clear exposure error flag*/239 exp[12] = HDCS00_CONTROL;240 exp[13] = 0x04; /* Restart streaming */241 err = stv06xx_write_sensor_bytes(sd, exp, 7);242 if (err < 0)243 return err;244 }245 gspca_dbg(gspca_dev, D_CONF, "Writing exposure %d, rowexp %d, srowexp %d\n",246 val, rowexp, srowexp);247 return err;248}249 250static int hdcs_set_gains(struct sd *sd, u8 g)251{252 int err;253 u8 gains[4];254 255 /* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */256 if (g > 127)257 g = 0x80 | (g / 2);258 259 gains[0] = g;260 gains[1] = g;261 gains[2] = g;262 gains[3] = g;263 264 err = hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4);265 return err;266}267 268static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val)269{270 gspca_dbg(gspca_dev, D_CONF, "Writing gain %d\n", val);271 return hdcs_set_gains((struct sd *) gspca_dev,272 val & 0xff);273}274 275static int hdcs_set_size(struct sd *sd,276 unsigned int width, unsigned int height)277{278 struct hdcs *hdcs = sd->sensor_priv;279 u8 win[4];280 unsigned int x, y;281 int err;282 283 /* must be multiple of 4 */284 width = (width + 3) & ~0x3;285 height = (height + 3) & ~0x3;286 287 if (width > hdcs->array.width)288 width = hdcs->array.width;289 290 if (IS_1020(sd)) {291 /* the borders are also invalid */292 if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP293 > hdcs->array.height)294 height = hdcs->array.height - 2 * hdcs->array.border -295 HDCS_1020_BOTTOM_Y_SKIP;296 297 y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2298 + hdcs->array.top;299 } else {300 if (height > hdcs->array.height)301 height = hdcs->array.height;302 303 y = hdcs->array.top + (hdcs->array.height - height) / 2;304 }305 306 x = hdcs->array.left + (hdcs->array.width - width) / 2;307 308 win[0] = y / 4;309 win[1] = x / 4;310 win[2] = (y + height) / 4 - 1;311 win[3] = (x + width) / 4 - 1;312 313 err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4);314 if (err < 0)315 return err;316 317 /* Update the current width and height */318 hdcs->w = width;319 hdcs->h = height;320 return err;321}322 323static int hdcs_s_ctrl(struct v4l2_ctrl *ctrl)324{325 struct gspca_dev *gspca_dev =326 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);327 int err = -EINVAL;328 329 switch (ctrl->id) {330 case V4L2_CID_GAIN:331 err = hdcs_set_gain(gspca_dev, ctrl->val);332 break;333 case V4L2_CID_EXPOSURE:334 err = hdcs_set_exposure(gspca_dev, ctrl->val);335 break;336 }337 return err;338}339 340static const struct v4l2_ctrl_ops hdcs_ctrl_ops = {341 .s_ctrl = hdcs_s_ctrl,342};343 344static int hdcs_init_controls(struct sd *sd)345{346 struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;347 348 v4l2_ctrl_handler_init(hdl, 2);349 v4l2_ctrl_new_std(hdl, &hdcs_ctrl_ops,350 V4L2_CID_EXPOSURE, 0, 0xff, 1, HDCS_DEFAULT_EXPOSURE);351 v4l2_ctrl_new_std(hdl, &hdcs_ctrl_ops,352 V4L2_CID_GAIN, 0, 0xff, 1, HDCS_DEFAULT_GAIN);353 return hdl->error;354}355 356static int hdcs_probe_1x00(struct sd *sd)357{358 struct hdcs *hdcs;359 u16 sensor;360 int ret;361 362 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);363 if (ret < 0 || sensor != 0x08)364 return -ENODEV;365 366 pr_info("HDCS-1000/1100 sensor detected\n");367 368 sd->gspca_dev.cam.cam_mode = hdcs1x00_mode;369 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode);370 371 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);372 if (!hdcs)373 return -ENOMEM;374 375 hdcs->array.left = 8;376 hdcs->array.top = 8;377 hdcs->array.width = HDCS_1X00_DEF_WIDTH;378 hdcs->array.height = HDCS_1X00_DEF_HEIGHT;379 hdcs->array.border = 4;380 381 hdcs->exp.cto = 4;382 hdcs->exp.cpo = 2;383 hdcs->exp.rs = 186;384 hdcs->exp.er = 100;385 386 /*387 * Frame rate on HDCS-1000 with STV600 depends on PSMP:388 * 4 = doesn't work at all389 * 5 = 7.8 fps,390 * 6 = 6.9 fps,391 * 8 = 6.3 fps,392 * 10 = 5.5 fps,393 * 15 = 4.4 fps,394 * 31 = 2.8 fps395 *396 * Frame rate on HDCS-1000 with STV602 depends on PSMP:397 * 15 = doesn't work at all398 * 18 = doesn't work at all399 * 19 = 7.3 fps400 * 20 = 7.4 fps401 * 21 = 7.4 fps402 * 22 = 7.4 fps403 * 24 = 6.3 fps404 * 30 = 5.4 fps405 */406 hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5;407 408 sd->sensor_priv = hdcs;409 410 return 0;411}412 413static int hdcs_probe_1020(struct sd *sd)414{415 struct hdcs *hdcs;416 u16 sensor;417 int ret;418 419 ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);420 if (ret < 0 || sensor != 0x10)421 return -ENODEV;422 423 pr_info("HDCS-1020 sensor detected\n");424 425 sd->gspca_dev.cam.cam_mode = hdcs1020_mode;426 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode);427 428 hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);429 if (!hdcs)430 return -ENOMEM;431 432 /*433 * From Andrey's test image: looks like HDCS-1020 upper-left434 * visible pixel is at 24,8 (y maybe even smaller?) and lower-right435 * visible pixel at 375,299 (x maybe even larger?)436 */437 hdcs->array.left = 24;438 hdcs->array.top = 4;439 hdcs->array.width = HDCS_1020_DEF_WIDTH;440 hdcs->array.height = 304;441 hdcs->array.border = 4;442 443 hdcs->psmp = 6;444 445 hdcs->exp.cto = 3;446 hdcs->exp.cpo = 3;447 hdcs->exp.rs = 155;448 hdcs->exp.er = 96;449 450 sd->sensor_priv = hdcs;451 452 return 0;453}454 455static int hdcs_start(struct sd *sd)456{457 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;458 459 gspca_dbg(gspca_dev, D_STREAM, "Starting stream\n");460 461 return hdcs_set_state(sd, HDCS_STATE_RUN);462}463 464static int hdcs_stop(struct sd *sd)465{466 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;467 468 gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");469 470 return hdcs_set_state(sd, HDCS_STATE_SLEEP);471}472 473static int hdcs_init(struct sd *sd)474{475 struct hdcs *hdcs = sd->sensor_priv;476 int i, err = 0;477 478 /* Set the STV0602AA in STV0600 emulation mode */479 if (sd->bridge == BRIDGE_STV602)480 stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1);481 482 /* Execute the bridge init */483 for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) {484 err = stv06xx_write_bridge(sd, stv_bridge_init[i][0],485 stv_bridge_init[i][1]);486 }487 if (err < 0)488 return err;489 490 /* sensor soft reset */491 hdcs_reset(sd);492 493 /* Execute the sensor init */494 for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) {495 err = stv06xx_write_sensor(sd, stv_sensor_init[i][0],496 stv_sensor_init[i][1]);497 }498 if (err < 0)499 return err;500 501 /* Enable continuous frame capture, bit 2: stop when frame complete */502 err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3));503 if (err < 0)504 return err;505 506 /* Set PGA sample duration507 (was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */508 if (IS_1020(sd))509 err = stv06xx_write_sensor(sd, HDCS_TCTRL,510 (HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp);511 else512 err = stv06xx_write_sensor(sd, HDCS_TCTRL,513 (HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp);514 if (err < 0)515 return err;516 517 return hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);518}519 520static int hdcs_dump(struct sd *sd)521{522 u16 reg, val;523 524 pr_info("Dumping sensor registers:\n");525 526 for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) {527 stv06xx_read_sensor(sd, reg, &val);528 pr_info("reg 0x%02x = 0x%02x\n", reg, val);529 }530 return 0;531}532