1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Support for the sensor part which is integrated (I think) into the 4 * st6422 stv06xx alike bridge, as its integrated there are no i2c writes 5 * 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 Acher 11 * Mark Cave-Ayland, Carlo E Prelz, Dick Streefland 12 * Copyright (c) 2002, 2003 Tuukka Toivonen 13 */ 14 15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 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 4st 21 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 = 1 31 }, 32 /* Note we actually get 248 lines of data, of which we skip the 4st 33 4 as they are garbage, and we tell the app it only gets the 34 first 240 of the 244 lines it actually gets, so that it ignores 35 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 = 0 45 }, 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 else 257 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