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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Support for the sensor part which is integrated (I think) into the4 * st6422 stv06xx alike bridge, as its integrated there are no i2c writes5 * but instead direct bridge writes.6 *7 * Copyright (c) 2009 Hans de Goede <hdegoede@redhat.com>8 *9 * Strongly based on qc-usb-messenger, which is:10 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher11 * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland12 * Copyright (c) 2002, 2003 Tuukka Toivonen13 */14 15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt16 17#include "stv06xx_st6422.h"18 19static struct v4l2_pix_format st6422_mode[] = {20 /* Note we actually get 124 lines of data, of which we skip the 4st21 4 as they are garbage */22 {23 162,24 120,25 V4L2_PIX_FMT_SGRBG8,26 V4L2_FIELD_NONE,27 .sizeimage = 162 * 120,28 .bytesperline = 162,29 .colorspace = V4L2_COLORSPACE_SRGB,30 .priv = 131 },32 /* Note we actually get 248 lines of data, of which we skip the 4st33 4 as they are garbage, and we tell the app it only gets the34 first 240 of the 244 lines it actually gets, so that it ignores35 the last 4. */36 {37 324,38 240,39 V4L2_PIX_FMT_SGRBG8,40 V4L2_FIELD_NONE,41 .sizeimage = 324 * 244,42 .bytesperline = 324,43 .colorspace = V4L2_COLORSPACE_SRGB,44 .priv = 045 },46};47 48/* V4L2 controls supported by the driver */49static int setbrightness(struct sd *sd, s32 val);50static int setcontrast(struct sd *sd, s32 val);51static int setgain(struct sd *sd, u8 gain);52static int setexposure(struct sd *sd, s16 expo);53 54static int st6422_s_ctrl(struct v4l2_ctrl *ctrl)55{56 struct gspca_dev *gspca_dev =57 container_of(ctrl->handler, struct gspca_dev, ctrl_handler);58 struct sd *sd = (struct sd *)gspca_dev;59 int err = -EINVAL;60 61 switch (ctrl->id) {62 case V4L2_CID_BRIGHTNESS:63 err = setbrightness(sd, ctrl->val);64 break;65 case V4L2_CID_CONTRAST:66 err = setcontrast(sd, ctrl->val);67 break;68 case V4L2_CID_GAIN:69 err = setgain(sd, ctrl->val);70 break;71 case V4L2_CID_EXPOSURE:72 err = setexposure(sd, ctrl->val);73 break;74 }75 76 /* commit settings */77 if (err >= 0)78 err = stv06xx_write_bridge(sd, 0x143f, 0x01);79 sd->gspca_dev.usb_err = err;80 return err;81}82 83static const struct v4l2_ctrl_ops st6422_ctrl_ops = {84 .s_ctrl = st6422_s_ctrl,85};86 87static int st6422_init_controls(struct sd *sd)88{89 struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;90 91 v4l2_ctrl_handler_init(hdl, 4);92 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,93 V4L2_CID_BRIGHTNESS, 0, 31, 1, 3);94 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,95 V4L2_CID_CONTRAST, 0, 15, 1, 11);96 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,97 V4L2_CID_EXPOSURE, 0, 1023, 1, 256);98 v4l2_ctrl_new_std(hdl, &st6422_ctrl_ops,99 V4L2_CID_GAIN, 0, 255, 1, 64);100 101 return hdl->error;102}103 104static int st6422_probe(struct sd *sd)105{106 if (sd->bridge != BRIDGE_ST6422)107 return -ENODEV;108 109 pr_info("st6422 sensor detected\n");110 111 sd->gspca_dev.cam.cam_mode = st6422_mode;112 sd->gspca_dev.cam.nmodes = ARRAY_SIZE(st6422_mode);113 return 0;114}115 116static int st6422_init(struct sd *sd)117{118 int err = 0, i;119 120 static const u16 st6422_bridge_init[][2] = {121 { STV_ISO_ENABLE, 0x00 }, /* disable capture */122 { 0x1436, 0x00 },123 { 0x1432, 0x03 }, /* 0x00-0x1F brightness */124 { 0x143a, 0xf9 }, /* 0x00-0x0F contrast */125 { 0x0509, 0x38 }, /* R */126 { 0x050a, 0x38 }, /* G */127 { 0x050b, 0x38 }, /* B */128 { 0x050c, 0x2a },129 { 0x050d, 0x01 },130 131 132 { 0x1431, 0x00 }, /* 0x00-0x07 ??? */133 { 0x1433, 0x34 }, /* 160x120, 0x00-0x01 night filter */134 { 0x1438, 0x18 }, /* 640x480 */135/* 18 bayes */136/* 10 compressed? */137 138 { 0x1439, 0x00 },139/* anti-noise? 0xa2 gives a perfect image */140 141 { 0x143b, 0x05 },142 { 0x143c, 0x00 }, /* 0x00-0x01 - ??? */143 144 145/* shutter time 0x0000-0x03FF */146/* low value give good picures on moving objects (but requires much light) */147/* high value gives good picures in darkness (but tends to be overexposed) */148 { 0x143e, 0x01 },149 { 0x143d, 0x00 },150 151 { 0x1442, 0xe2 },152/* write: 1x1x xxxx */153/* read: 1x1x xxxx */154/* bit 5 == button pressed and hold if 0 */155/* write 0xe2,0xea */156 157/* 0x144a */158/* 0x00 init */159/* bit 7 == button has been pressed, but not handled */160 161/* interrupt */162/* if(urb->iso_frame_desc[i].status == 0x80) { */163/* if(urb->iso_frame_desc[i].status == 0x88) { */164 165 { 0x1500, 0xd0 },166 { 0x1500, 0xd0 },167 { 0x1500, 0x50 }, /* 0x00 - 0xFF 0x80 == compr ? */168 169 { 0x1501, 0xaf },170/* high val-> light area gets darker */171/* low val -> light area gets lighter */172 { 0x1502, 0xc2 },173/* high val-> light area gets darker */174/* low val -> light area gets lighter */175 { 0x1503, 0x45 },176/* high val-> light area gets darker */177/* low val -> light area gets lighter */178 { 0x1505, 0x02 },179/* 2 : 324x248 80352 bytes */180/* 7 : 248x162 40176 bytes */181/* c+f: 162*124 20088 bytes */182 183 { 0x150e, 0x8e },184 { 0x150f, 0x37 },185 { 0x15c0, 0x00 },186 { 0x15c3, 0x08 }, /* 0x04/0x14 ... test pictures ??? */187 188 189 { 0x143f, 0x01 }, /* commit settings */190 191 };192 193 for (i = 0; i < ARRAY_SIZE(st6422_bridge_init) && !err; i++) {194 err = stv06xx_write_bridge(sd, st6422_bridge_init[i][0],195 st6422_bridge_init[i][1]);196 }197 198 return err;199}200 201static int setbrightness(struct sd *sd, s32 val)202{203 /* val goes from 0 -> 31 */204 return stv06xx_write_bridge(sd, 0x1432, val);205}206 207static int setcontrast(struct sd *sd, s32 val)208{209 /* Val goes from 0 -> 15 */210 return stv06xx_write_bridge(sd, 0x143a, val | 0xf0);211}212 213static int setgain(struct sd *sd, u8 gain)214{215 int err;216 217 /* Set red, green, blue, gain */218 err = stv06xx_write_bridge(sd, 0x0509, gain);219 if (err < 0)220 return err;221 222 err = stv06xx_write_bridge(sd, 0x050a, gain);223 if (err < 0)224 return err;225 226 err = stv06xx_write_bridge(sd, 0x050b, gain);227 if (err < 0)228 return err;229 230 /* 2 mystery writes */231 err = stv06xx_write_bridge(sd, 0x050c, 0x2a);232 if (err < 0)233 return err;234 235 return stv06xx_write_bridge(sd, 0x050d, 0x01);236}237 238static int setexposure(struct sd *sd, s16 expo)239{240 int err;241 242 err = stv06xx_write_bridge(sd, 0x143d, expo & 0xff);243 if (err < 0)244 return err;245 246 return stv06xx_write_bridge(sd, 0x143e, expo >> 8);247}248 249static int st6422_start(struct sd *sd)250{251 int err;252 struct cam *cam = &sd->gspca_dev.cam;253 254 if (cam->cam_mode[sd->gspca_dev.curr_mode].priv)255 err = stv06xx_write_bridge(sd, 0x1505, 0x0f);256 else257 err = stv06xx_write_bridge(sd, 0x1505, 0x02);258 if (err < 0)259 return err;260 261 /* commit settings */262 err = stv06xx_write_bridge(sd, 0x143f, 0x01);263 return (err < 0) ? err : 0;264}265 266static int st6422_stop(struct sd *sd)267{268 struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;269 270 gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");271 272 return 0;273}274