1 /* 2 * STV0680 USB Camera Driver 3 * 4 * Copyright (C) 2009 Hans de Goede <hdegoede@redhat.com> 5 * 6 * This module is adapted from the in kernel v4l1 stv680 driver: 7 * 8 * STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net) 9 * 10 * Thanks to STMicroelectronics for information on the usb commands, and 11 * to Steve Miller at STM for his help and encouragement while I was 12 * writing this driver. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2 of the License, or 17 * (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 27 * 28 */ 29 30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 31 32 #define MODULE_NAME "stv0680" 33 34 #include "gspca.h" 35 36 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); 37 MODULE_DESCRIPTION("STV0680 USB Camera Driver"); 38 MODULE_LICENSE("GPL"); 39 40 /* specific webcam descriptor */ 41 struct sd { 42 struct gspca_dev gspca_dev; /* !! must be the first item */ 43 struct v4l2_pix_format mode; 44 u8 orig_mode; 45 u8 video_mode; 46 u8 current_mode; 47 }; 48 49 static int stv_sndctrl(struct gspca_dev *gspca_dev, int set, u8 req, u16 val, 50 int size) 51 { 52 int ret = -1; 53 u8 req_type = 0; 54 unsigned int pipe = 0; 55 56 switch (set) { 57 case 0: /* 0xc1 */ 58 req_type = USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; 59 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0); 60 break; 61 case 1: /* 0x41 */ 62 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; 63 pipe = usb_sndctrlpipe(gspca_dev->dev, 0); 64 break; 65 case 2: /* 0x80 */ 66 req_type = USB_DIR_IN | USB_RECIP_DEVICE; 67 pipe = usb_rcvctrlpipe(gspca_dev->dev, 0); 68 break; 69 case 3: /* 0x40 */ 70 req_type = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE; 71 pipe = usb_sndctrlpipe(gspca_dev->dev, 0); 72 break; 73 } 74 75 ret = usb_control_msg(gspca_dev->dev, pipe, 76 req, req_type, 77 val, 0, gspca_dev->usb_buf, size, 500); 78 79 if ((ret < 0) && (req != 0x0a)) 80 pr_err("usb_control_msg error %i, request = 0x%x, error = %i\n", 81 set, req, ret); 82 83 return ret; 84 } 85 86 static int stv0680_handle_error(struct gspca_dev *gspca_dev, int ret) 87 { 88 stv_sndctrl(gspca_dev, 0, 0x80, 0, 0x02); /* Get Last Error */ 89 PERR("last error: %i, command = 0x%x", 90 gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]); 91 return ret; 92 } 93 94 static int stv0680_get_video_mode(struct gspca_dev *gspca_dev) 95 { 96 /* Note not sure if this init of usb_buf is really necessary */ 97 memset(gspca_dev->usb_buf, 0, 8); 98 gspca_dev->usb_buf[0] = 0x0f; 99 100 if (stv_sndctrl(gspca_dev, 0, 0x87, 0, 0x08) != 0x08) { 101 PERR("Get_Camera_Mode failed"); 102 return stv0680_handle_error(gspca_dev, -EIO); 103 } 104 105 return gspca_dev->usb_buf[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */ 106 } 107 108 static int stv0680_set_video_mode(struct gspca_dev *gspca_dev, u8 mode) 109 { 110 struct sd *sd = (struct sd *) gspca_dev; 111 112 if (sd->current_mode == mode) 113 return 0; 114 115 memset(gspca_dev->usb_buf, 0, 8); 116 gspca_dev->usb_buf[0] = mode; 117 118 if (stv_sndctrl(gspca_dev, 3, 0x07, 0x0100, 0x08) != 0x08) { 119 PERR("Set_Camera_Mode failed"); 120 return stv0680_handle_error(gspca_dev, -EIO); 121 } 122 123 /* Verify we got what we've asked for */ 124 if (stv0680_get_video_mode(gspca_dev) != mode) { 125 PERR("Error setting camera video mode!"); 126 return -EIO; 127 } 128 129 sd->current_mode = mode; 130 131 return 0; 132 } 133 134 /* this function is called at probe time */ 135 static int sd_config(struct gspca_dev *gspca_dev, 136 const struct usb_device_id *id) 137 { 138 int ret; 139 struct sd *sd = (struct sd *) gspca_dev; 140 struct cam *cam = &gspca_dev->cam; 141 142 /* Give the camera some time to settle, otherwise initialization will 143 fail on hotplug, and yes it really needs a full second. */ 144 msleep(1000); 145 146 /* ping camera to be sure STV0680 is present */ 147 if (stv_sndctrl(gspca_dev, 0, 0x88, 0x5678, 0x02) != 0x02 || 148 gspca_dev->usb_buf[0] != 0x56 || gspca_dev->usb_buf[1] != 0x78) { 149 PERR("STV(e): camera ping failed!!"); 150 return stv0680_handle_error(gspca_dev, -ENODEV); 151 } 152 153 /* get camera descriptor */ 154 if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x09) != 0x09) 155 return stv0680_handle_error(gspca_dev, -ENODEV); 156 157 if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0200, 0x22) != 0x22 || 158 gspca_dev->usb_buf[7] != 0xa0 || gspca_dev->usb_buf[8] != 0x23) { 159 PERR("Could not get descriptor 0200."); 160 return stv0680_handle_error(gspca_dev, -ENODEV); 161 } 162 if (stv_sndctrl(gspca_dev, 0, 0x8a, 0, 0x02) != 0x02) 163 return stv0680_handle_error(gspca_dev, -ENODEV); 164 if (stv_sndctrl(gspca_dev, 0, 0x8b, 0, 0x24) != 0x24) 165 return stv0680_handle_error(gspca_dev, -ENODEV); 166 if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10) 167 return stv0680_handle_error(gspca_dev, -ENODEV); 168 169 if (!(gspca_dev->usb_buf[7] & 0x09)) { 170 PERR("Camera supports neither CIF nor QVGA mode"); 171 return -ENODEV; 172 } 173 if (gspca_dev->usb_buf[7] & 0x01) 174 PDEBUG(D_PROBE, "Camera supports CIF mode"); 175 if (gspca_dev->usb_buf[7] & 0x02) 176 PDEBUG(D_PROBE, "Camera supports VGA mode"); 177 if (gspca_dev->usb_buf[7] & 0x04) 178 PDEBUG(D_PROBE, "Camera supports QCIF mode"); 179 if (gspca_dev->usb_buf[7] & 0x08) 180 PDEBUG(D_PROBE, "Camera supports QVGA mode"); 181 182 if (gspca_dev->usb_buf[7] & 0x01) 183 sd->video_mode = 0x00; /* CIF */ 184 else 185 sd->video_mode = 0x03; /* QVGA */ 186 187 /* FW rev, ASIC rev, sensor ID */ 188 PDEBUG(D_PROBE, "Firmware rev is %i.%i", 189 gspca_dev->usb_buf[0], gspca_dev->usb_buf[1]); 190 PDEBUG(D_PROBE, "ASIC rev is %i.%i", 191 gspca_dev->usb_buf[2], gspca_dev->usb_buf[3]); 192 PDEBUG(D_PROBE, "Sensor ID is %i", 193 (gspca_dev->usb_buf[4]*16) + (gspca_dev->usb_buf[5]>>4)); 194 195 196 ret = stv0680_get_video_mode(gspca_dev); 197 if (ret < 0) 198 return ret; 199 sd->current_mode = sd->orig_mode = ret; 200 201 ret = stv0680_set_video_mode(gspca_dev, sd->video_mode); 202 if (ret < 0) 203 return ret; 204 205 /* Get mode details */ 206 if (stv_sndctrl(gspca_dev, 0, 0x8f, 0, 0x10) != 0x10) 207 return stv0680_handle_error(gspca_dev, -EIO); 208 209 cam->bulk = 1; 210 cam->bulk_nurbs = 1; /* The cam cannot handle more */ 211 cam->bulk_size = (gspca_dev->usb_buf[0] << 24) | 212 (gspca_dev->usb_buf[1] << 16) | 213 (gspca_dev->usb_buf[2] << 8) | 214 (gspca_dev->usb_buf[3]); 215 sd->mode.width = (gspca_dev->usb_buf[4] << 8) | 216 (gspca_dev->usb_buf[5]); /* 322, 356, 644 */ 217 sd->mode.height = (gspca_dev->usb_buf[6] << 8) | 218 (gspca_dev->usb_buf[7]); /* 242, 292, 484 */ 219 sd->mode.pixelformat = V4L2_PIX_FMT_STV0680; 220 sd->mode.field = V4L2_FIELD_NONE; 221 sd->mode.bytesperline = sd->mode.width; 222 sd->mode.sizeimage = cam->bulk_size; 223 sd->mode.colorspace = V4L2_COLORSPACE_SRGB; 224 225 /* origGain = gspca_dev->usb_buf[12]; */ 226 227 cam->cam_mode = &sd->mode; 228 cam->nmodes = 1; 229 230 231 ret = stv0680_set_video_mode(gspca_dev, sd->orig_mode); 232 if (ret < 0) 233 return ret; 234 235 if (stv_sndctrl(gspca_dev, 2, 0x06, 0x0100, 0x12) != 0x12 || 236 gspca_dev->usb_buf[8] != 0x53 || gspca_dev->usb_buf[9] != 0x05) { 237 pr_err("Could not get descriptor 0100\n"); 238 return stv0680_handle_error(gspca_dev, -EIO); 239 } 240 241 return 0; 242 } 243 244 /* this function is called at probe and resume time */ 245 static int sd_init(struct gspca_dev *gspca_dev) 246 { 247 return 0; 248 } 249 250 /* -- start the camera -- */ 251 static int sd_start(struct gspca_dev *gspca_dev) 252 { 253 int ret; 254 struct sd *sd = (struct sd *) gspca_dev; 255 256 ret = stv0680_set_video_mode(gspca_dev, sd->video_mode); 257 if (ret < 0) 258 return ret; 259 260 if (stv_sndctrl(gspca_dev, 0, 0x85, 0, 0x10) != 0x10) 261 return stv0680_handle_error(gspca_dev, -EIO); 262 263 /* Start stream at: 264 0x0000 = CIF (352x288) 265 0x0100 = VGA (640x480) 266 0x0300 = QVGA (320x240) */ 267 if (stv_sndctrl(gspca_dev, 1, 0x09, sd->video_mode << 8, 0x0) != 0x0) 268 return stv0680_handle_error(gspca_dev, -EIO); 269 270 return 0; 271 } 272 273 static void sd_stopN(struct gspca_dev *gspca_dev) 274 { 275 /* This is a high priority command; it stops all lower order cmds */ 276 if (stv_sndctrl(gspca_dev, 1, 0x04, 0x0000, 0x0) != 0x0) 277 stv0680_handle_error(gspca_dev, -EIO); 278 } 279 280 static void sd_stop0(struct gspca_dev *gspca_dev) 281 { 282 struct sd *sd = (struct sd *) gspca_dev; 283 284 if (!sd->gspca_dev.present) 285 return; 286 287 stv0680_set_video_mode(gspca_dev, sd->orig_mode); 288 } 289 290 static void sd_pkt_scan(struct gspca_dev *gspca_dev, 291 u8 *data, 292 int len) 293 { 294 struct sd *sd = (struct sd *) gspca_dev; 295 296 /* Every now and then the camera sends a 16 byte packet, no idea 297 what it contains, but it is not image data, when this 298 happens the frame received before this packet is corrupt, 299 so discard it. */ 300 if (len != sd->mode.sizeimage) { 301 gspca_dev->last_packet_type = DISCARD_PACKET; 302 return; 303 } 304 305 /* Finish the previous frame, we do this upon reception of the next 306 packet, even though it is already complete so that the strange 16 307 byte packets send after a corrupt frame can discard it. */ 308 gspca_frame_add(gspca_dev, LAST_PACKET, NULL, 0); 309 310 /* Store the just received frame */ 311 gspca_frame_add(gspca_dev, FIRST_PACKET, data, len); 312 } 313 314 /* sub-driver description */ 315 static const struct sd_desc sd_desc = { 316 .name = MODULE_NAME, 317 .config = sd_config, 318 .init = sd_init, 319 .start = sd_start, 320 .stopN = sd_stopN, 321 .stop0 = sd_stop0, 322 .pkt_scan = sd_pkt_scan, 323 }; 324 325 /* -- module initialisation -- */ 326 static const struct usb_device_id device_table[] = { 327 {USB_DEVICE(0x0553, 0x0202)}, 328 {USB_DEVICE(0x041e, 0x4007)}, 329 {} 330 }; 331 MODULE_DEVICE_TABLE(usb, device_table); 332 333 /* -- device connect -- */ 334 static int sd_probe(struct usb_interface *intf, 335 const struct usb_device_id *id) 336 { 337 return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd), 338 THIS_MODULE); 339 } 340 341 static struct usb_driver sd_driver = { 342 .name = MODULE_NAME, 343 .id_table = device_table, 344 .probe = sd_probe, 345 .disconnect = gspca_disconnect, 346 #ifdef CONFIG_PM 347 .suspend = gspca_suspend, 348 .resume = gspca_resume, 349 .reset_resume = gspca_resume, 350 #endif 351 }; 352 353 module_usb_driver(sd_driver); 354