1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * STV0680 USB Camera Driver 4 * 5 * Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com> 6 * 7 * This module is adapted from the in kernel v4l1 stv680 driver: 8 * 9 * STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net) 10 * 11 * Thanks to STMicroelectronics for information on the usb commands, and 12 * to Steve Miller at STM for his help and encouragement while I was 13 * writing this driver. 14 */ 15 16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 17 18 #define MODULE_NAME "stv0680" 19 20 #include "gspca.h" 21 22 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 23 MODULE_DESCRIPTION("STV0680 USB Camera Driver"); 24 MODULE_LICENSE("GPL"); 25 26 /* specific webcam descriptor */ 27 struct sd { 28 struct gspca_dev gspca_dev; /* !! must be the first item */ 29 struct v4l2_pix_format mode; 30 u8 orig_mode; 31 u8 video_mode; 32 u8 current_mode; 33 }; 34 35 static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val, 36 int size) 37 { 38 int ret; 39 u8 req_type = 0; 40 unsigned int pipe = 0; 41 42 switch (set) { 43 case 0: /* 0xc1 */ 44 req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; 45 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0); 46 break; 47 case 1: /* 0x41 */ 48 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; 49 pipe = usb_sndctrlpipe(gspca_dev->dev, 0); 50 break; 51 case 2: /* 0x80 */ 52 req_type = USB_DIR_IN | USB_RECIP_DEVICE; 53 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0); 54 break; 55 case 3: /* 0x40 */ 56 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE; 57 pipe = usb_sndctrlpipe(gspca_dev->dev, 0); 58 break; 59 } 60 61 ret = usb_control_msg(gspca_dev->dev, pipe, 62 req, req_type, 63 val, 0, gspca_dev->usb_buf, size, 500); 64 65 if ((ret < 0) && (req != 0x0a)) 66 pr_err("usb_control_msg error %i, request = 0x%x, error = %i\n", 67 set, req, ret); 68 69 return ret; 70 } 71 72 static int stv0680_handle_error(struct gspca_dev *gspca_dev, int ret) 73 { 74 stv_sndctrl(gspca_dev, 0, 0x80, 0, 0x02); /* Get Last Error */ 75 gspca_err(gspca_dev, "last error: %i, command = 0x%x\n", 76 gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]); 77 return ret; 78 } 79 80 static int stv0680_get_video_mode(struct gspca_dev *gspca_dev) 81 { 82 /* Note not sure if this init of usb_buf is really necessary */ 83 memset(gspca_dev->usb_buf, 0, 8); 84 gspca_dev->usb_buf[0] = 0x0f; 85 86 if (stv_sndctrl(gspca_dev, 0, 0x87, 0, 0x08) != 0x08) { 87 gspca_err(gspca_dev, "Get_Camera_Mode failed\n"); 88 return stv0680_handle_error(gspca_dev, -EIO); 89 } 90 91 return gspca_dev->usb_buf[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */ 92 } 93 94 static int stv0680_set_video_mode(struct gspca_dev *gspca_dev, u8 mode) 95 { 96 struct sd *sd = (struct sd *) gspca_dev; 97 98 if (sd->current_mode == mode) 99 return 0; 100 101 memset(gspca_dev->usb_buf, 0, 8); 102 gspca_dev->usb_buf[0] = mode; 103 104 if (stv_sndctrl(gspca_dev, 3, 0x07, 0x0100, 0x08) != 0x08) { 105 gspca_err(gspca_dev, "Set_Camera_Mode failed\n"); 106 return stv0680_handle_error(gspca_dev, -EIO); 107 } 108 109 /* Verify we got what we've asked for */ 110 if (stv0680_get_video_mode(gspca_dev) != mode) { 111 gspca_err(gspca_dev, "Error setting camera video mode!\n"); 112 return -EIO; 113 } 114 115 sd->current_mode = mode; 116 117 return 0; 118 } 119 120 /* this function is called at probe time */ 121 static int sd_config(struct gspca_dev *gspca_dev, 122 const struct usb_device_id *id) 123 { 124 int ret; 125 struct sd *sd = (struct sd *) gspca_dev; 126 struct cam *cam = &gspca_dev->cam; 127 128 /* Give the camera some time to settle, otherwise initialization will 129 fail on hotplug, and yes it really needs a full second. */ 130 msleep(1000); 131 132 /* ping camera to be sure STV0680 is present */ 133 if (stv_sndctrl(gspca_dev, 0, 0x88, 0x5678, 0x02) != 0x02 || 134 gspca_dev->usb_buf[0] != 0x56 || gspca_dev->usb_buf[1] != 0x78) { 135 gspca_err(gspca_dev, "STV(e): camera ping failed!!\n"); 136 return stv0680_handle_error(gspca_dev, -ENODEV); 137 } 138 139 /* get camera descriptor */ 140 if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x09) != 0x09) 141 return stv0680_handle_error(gspca_dev, -ENODEV); 142 143 if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x22) != 0x22 || 144 gspca_dev->usb_buf[7] != 0xa0 || gspca_dev->usb_buf[8] != 0x23) { 145 gspca_err(gspca_dev, "Could not get descriptor 0200\n"); 146 return stv0680_handle_error(gspca_dev, -ENODEV); 147 } 148 if (stv_sndctrl(gspca_dev, 0, 0x8a, 0, 0x02) != 0x02) 149 return stv0680_handle_error(gspca_dev, -ENODEV); 150 if (stv_sndctrl(gspca_dev, 0, 0x8b, 0, 0x24) != 0x24) 151 return stv0680_handle_error(gspca_dev, -ENODEV); 152 if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10) 153 return stv0680_handle_error(gspca_dev, -ENODEV); 154 155 if (!(gspca_dev->usb_buf[7] & 0x09)) { 156 gspca_err(gspca_dev, "Camera supports neither CIF nor QVGA mode\n"); 157 return -ENODEV; 158 } 159 if (gspca_dev->usb_buf[7] & 0x01) 160 gspca_dbg(gspca_dev, D_PROBE, "Camera supports CIF mode\n"); 161 if (gspca_dev->usb_buf[7] & 0x02) 162 gspca_dbg(gspca_dev, D_PROBE, "Camera supports VGA mode\n"); 163 if (gspca_dev->usb_buf[7] & 0x04) 164 gspca_dbg(gspca_dev, D_PROBE, "Camera supports QCIF mode\n"); 165 if (gspca_dev->usb_buf[7] & 0x08) 166 gspca_dbg(gspca_dev, D_PROBE, "Camera supports QVGA mode\n"); 167 168 if (gspca_dev->usb_buf[7] & 0x01) 169 sd->video_mode = 0x00; /* CIF */ 170 else 171 sd->video_mode = 0x03; /* QVGA */ 172 173 /* FW rev, ASIC rev, sensor ID */ 174 gspca_dbg(gspca_dev, D_PROBE, "Firmware rev is %i.%i\n", 175 gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]); 176 gspca_dbg(gspca_dev, D_PROBE, "ASIC rev is %i.%i", 177 gspca_dev->usb_buf[2], gspca_dev->usb_buf[3]); 178 gspca_dbg(gspca_dev, D_PROBE, "Sensor ID is %i", 179 (gspca_dev->usb_buf[4]*16) + (gspca_dev->usb_buf[5]>>4)); 180 181 182 ret = stv0680_get_video_mode(gspca_dev); 183 if (ret < 0) 184 return ret; 185 sd->current_mode = sd->orig_mode = ret; 186 187 ret = stv0680_set_video_mode(gspca_dev, sd->video_mode); 188 if (ret < 0) 189 return ret; 190 191 /* Get mode details */ 192 if (stv_sndctrl(gspca_dev, 0, 0x8f, 0, 0x10) != 0x10) 193 return stv0680_handle_error(gspca_dev, -EIO); 194 195 cam->bulk = 1; 196 cam->bulk_nurbs = 1; /* The cam cannot handle more */ 197 cam->bulk_size = (gspca_dev->usb_buf[0] << 24) | 198 (gspca_dev->usb_buf[1] << 16) | 199 (gspca_dev->usb_buf[2] << 8) | 200 (gspca_dev->usb_buf[3]); 201 sd->mode.width = (gspca_dev->usb_buf[4] << 8) | 202 (gspca_dev->usb_buf[5]); /* 322, 356, 644 */ 203 sd->mode.height = (gspca_dev->usb_buf[6] << 8) | 204 (gspca_dev->usb_buf[7]); /* 242, 292, 484 */ 205 sd->mode.pixelformat = V4L2_PIX_FMT_STV0680; 206 sd->mode.field = V4L2_FIELD_NONE; 207 sd->mode.bytesperline = sd->mode.width; 208 sd->mode.sizeimage = cam->bulk_size; 209 sd->mode.colorspace = V4L2_COLORSPACE_SRGB; 210 211 /* origGain = gspca_dev->usb_buf[12]; */ 212 213 cam->cam_mode = &sd->mode; 214 cam->nmodes = 1; 215 216 217 ret = stv0680_set_video_mode(gspca_dev, sd->orig_mode); 218 if (ret < 0) 219 return ret; 220 221 if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0100, 0x12) != 0x12 || 222 gspca_dev->usb_buf[8] != 0x53 || gspca_dev->usb_buf[9] != 0x05) { 223 pr_err("Could not get descriptor 0100\n"); 224 return stv0680_handle_error(gspca_dev, -EIO); 225 } 226 227 return 0; 228 } 229 230 /* this function is called at probe and resume time */ 231 static int sd_init(struct gspca_dev *gspca_dev) 232 { 233 return 0; 234 } 235 236 /* -- start the camera -- */ 237 static int sd_start(struct gspca_dev *gspca_dev) 238 { 239 int ret; 240 struct sd *sd = (struct sd *) gspca_dev; 241 242 ret = stv0680_set_video_mode(gspca_dev, sd->video_mode); 243 if (ret < 0) 244 return ret; 245 246 if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10) 247 return stv0680_handle_error(gspca_dev, -EIO); 248 249 /* Start stream at: 250 0x0000 = CIF (352x288) 251 0x0100 = VGA (640x480) 252 0x0300 = QVGA (320x240) */ 253 if (stv_sndctrl(gspca_dev, 1, 0x09, sd->video_mode << 8, 0x0) != 0x0) 254 return stv0680_handle_error(gspca_dev, -EIO); 255 256 return 0; 257 } 258 259 static void sd_stopN(struct gspca_dev *gspca_dev) 260 { 261 /* This is a high priority command; it stops all lower order cmds */ 262 if (stv_sndctrl(gspca_dev, 1, 0x04, 0x0000, 0x0) != 0x0) 263 stv0680_handle_error(gspca_dev, -EIO); 264 } 265 266 static void sd_stop0(struct gspca_dev *gspca_dev) 267 { 268 struct sd *sd = (struct sd *) gspca_dev; 269 270 if (!sd->gspca_dev.present) 271 return; 272 273 stv0680_set_video_mode(gspca_dev, sd->orig_mode); 274 } 275 276 static void sd_pkt_scan(struct gspca_dev *gspca_dev, 277 u8 *data, 278 int len) 279 { 280 struct sd *sd = (struct sd *) gspca_dev; 281 282 /* Every now and then the camera sends a 16 byte packet, no idea 283 what it contains, but it is not image data, when this 284 happens the frame received before this packet is corrupt, 285 so discard it. */ 286 if (len != sd->mode.sizeimage) { 287 gspca_dev->last_packet_type = DISCARD_PACKET; 288 return; 289 } 290 291 /* Finish the previous frame, we do this upon reception of the next 292 packet, even though it is already complete so that the strange 16 293 byte packets send after a corrupt frame can discard it. */ 294 gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0); 295 296 /* Store the just received frame */ 297 gspca_frame_add(gspca_dev, FIRST_PACKET, data, len); 298 } 299 300 /* sub-driver description */ 301 static const struct sd_desc sd_desc = { 302 .name = MODULE_NAME, 303 .config = sd_config, 304 .init = sd_init, 305 .start = sd_start, 306 .stopN = sd_stopN, 307 .stop0 = sd_stop0, 308 .pkt_scan = sd_pkt_scan, 309 }; 310 311 /* -- module initialisation -- */ 312 static const struct usb_device_id device_table[] = { 313 {USB_DEVICE(0x0553, 0x0202)}, 314 {USB_DEVICE(0x041e, 0x4007)}, 315 {} 316 }; 317 MODULE_DEVICE_TABLE(usb, device_table); 318 319 /* -- device connect -- */ 320 static int sd_probe(struct usb_interface *intf, 321 const struct usb_device_id *id) 322 { 323 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), 324 THIS_MODULE); 325 } 326 327 static struct usb_driver sd_driver = { 328 .name = MODULE_NAME, 329 .id_table = device_table, 330 .probe = sd_probe, 331 .disconnect = gspca_disconnect, 332 #ifdef CONFIG_PM 333 .suspend = gspca_suspend, 334 .resume = gspca_resume, 335 .reset_resume = gspca_resume, 336 #endif 337 }; 338 339 module_usb_driver(sd_driver); 340