| 1 |
62 |
marcus.erl |
/*
|
| 2 |
|
|
* cpia_usb CPiA USB driver
|
| 3 |
|
|
*
|
| 4 |
|
|
* Supports CPiA based parallel port Video Camera's.
|
| 5 |
|
|
*
|
| 6 |
|
|
* Copyright (C) 1999 Jochen Scharrlach <Jochen.Scharrlach@schwaben.de>
|
| 7 |
|
|
* Copyright (C) 1999, 2000 Johannes Erdfelt <johannes@erdfelt.com>
|
| 8 |
|
|
*
|
| 9 |
|
|
* This program is free software; you can redistribute it and/or modify
|
| 10 |
|
|
* it under the terms of the GNU General Public License as published by
|
| 11 |
|
|
* the Free Software Foundation; either version 2 of the License, or
|
| 12 |
|
|
* (at your option) any later version.
|
| 13 |
|
|
*
|
| 14 |
|
|
* This program is distributed in the hope that it will be useful,
|
| 15 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 16 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 17 |
|
|
* GNU General Public License for more details.
|
| 18 |
|
|
*
|
| 19 |
|
|
* You should have received a copy of the GNU General Public License
|
| 20 |
|
|
* along with this program; if not, write to the Free Software
|
| 21 |
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
| 22 |
|
|
*/
|
| 23 |
|
|
|
| 24 |
|
|
/* define _CPIA_DEBUG_ for verbose debug output (see cpia.h) */
|
| 25 |
|
|
/* #define _CPIA_DEBUG_ 1 */
|
| 26 |
|
|
|
| 27 |
|
|
#include <linux/module.h>
|
| 28 |
|
|
#include <linux/kernel.h>
|
| 29 |
|
|
#include <linux/init.h>
|
| 30 |
|
|
#include <linux/wait.h>
|
| 31 |
|
|
#include <linux/list.h>
|
| 32 |
|
|
#include <linux/slab.h>
|
| 33 |
|
|
#include <linux/vmalloc.h>
|
| 34 |
|
|
#include <linux/usb.h>
|
| 35 |
|
|
|
| 36 |
|
|
#include "cpia.h"
|
| 37 |
|
|
|
| 38 |
|
|
#define USB_REQ_CPIA_GRAB_FRAME 0xC1
|
| 39 |
|
|
#define USB_REQ_CPIA_UPLOAD_FRAME 0xC2
|
| 40 |
|
|
#define WAIT_FOR_NEXT_FRAME 0
|
| 41 |
|
|
#define FORCE_FRAME_UPLOAD 1
|
| 42 |
|
|
|
| 43 |
|
|
#define FRAMES_PER_DESC 10
|
| 44 |
|
|
#define FRAME_SIZE_PER_DESC 960 /* Shouldn't be hardcoded */
|
| 45 |
|
|
#define CPIA_NUMSBUF 2
|
| 46 |
|
|
#define STREAM_BUF_SIZE (PAGE_SIZE * 4)
|
| 47 |
|
|
#define SCRATCH_BUF_SIZE (STREAM_BUF_SIZE * 2)
|
| 48 |
|
|
|
| 49 |
|
|
struct cpia_sbuf {
|
| 50 |
|
|
char *data;
|
| 51 |
|
|
struct urb *urb;
|
| 52 |
|
|
};
|
| 53 |
|
|
|
| 54 |
|
|
#define FRAMEBUF_LEN (CPIA_MAX_FRAME_SIZE+100)
|
| 55 |
|
|
enum framebuf_status {
|
| 56 |
|
|
FRAME_EMPTY,
|
| 57 |
|
|
FRAME_READING,
|
| 58 |
|
|
FRAME_READY,
|
| 59 |
|
|
FRAME_ERROR,
|
| 60 |
|
|
};
|
| 61 |
|
|
|
| 62 |
|
|
struct framebuf {
|
| 63 |
|
|
int length;
|
| 64 |
|
|
enum framebuf_status status;
|
| 65 |
|
|
u8 data[FRAMEBUF_LEN];
|
| 66 |
|
|
struct framebuf *next;
|
| 67 |
|
|
};
|
| 68 |
|
|
|
| 69 |
|
|
struct usb_cpia {
|
| 70 |
|
|
/* Device structure */
|
| 71 |
|
|
struct usb_device *dev;
|
| 72 |
|
|
|
| 73 |
|
|
unsigned char iface;
|
| 74 |
|
|
wait_queue_head_t wq_stream;
|
| 75 |
|
|
|
| 76 |
|
|
int cursbuf; /* Current receiving sbuf */
|
| 77 |
|
|
struct cpia_sbuf sbuf[CPIA_NUMSBUF]; /* Double buffering */
|
| 78 |
|
|
|
| 79 |
|
|
int streaming;
|
| 80 |
|
|
int open;
|
| 81 |
|
|
int present;
|
| 82 |
|
|
struct framebuf *buffers[3];
|
| 83 |
|
|
struct framebuf *curbuff, *workbuff;
|
| 84 |
|
|
};
|
| 85 |
|
|
|
| 86 |
|
|
static int cpia_usb_open(void *privdata);
|
| 87 |
|
|
static int cpia_usb_registerCallback(void *privdata, void (*cb) (void *cbdata),
|
| 88 |
|
|
void *cbdata);
|
| 89 |
|
|
static int cpia_usb_transferCmd(void *privdata, u8 *command, u8 *data);
|
| 90 |
|
|
static int cpia_usb_streamStart(void *privdata);
|
| 91 |
|
|
static int cpia_usb_streamStop(void *privdata);
|
| 92 |
|
|
static int cpia_usb_streamRead(void *privdata, u8 *frame, int noblock);
|
| 93 |
|
|
static int cpia_usb_close(void *privdata);
|
| 94 |
|
|
|
| 95 |
|
|
#define ABOUT "USB driver for Vision CPiA based cameras"
|
| 96 |
|
|
|
| 97 |
|
|
static struct cpia_camera_ops cpia_usb_ops = {
|
| 98 |
|
|
cpia_usb_open,
|
| 99 |
|
|
cpia_usb_registerCallback,
|
| 100 |
|
|
cpia_usb_transferCmd,
|
| 101 |
|
|
cpia_usb_streamStart,
|
| 102 |
|
|
cpia_usb_streamStop,
|
| 103 |
|
|
cpia_usb_streamRead,
|
| 104 |
|
|
cpia_usb_close,
|
| 105 |
|
|
0,
|
| 106 |
|
|
THIS_MODULE
|
| 107 |
|
|
};
|
| 108 |
|
|
|
| 109 |
|
|
static LIST_HEAD(cam_list);
|
| 110 |
|
|
static spinlock_t cam_list_lock_usb;
|
| 111 |
|
|
|
| 112 |
|
|
static void cpia_usb_complete(struct urb *urb)
|
| 113 |
|
|
{
|
| 114 |
|
|
int i;
|
| 115 |
|
|
char *cdata;
|
| 116 |
|
|
struct usb_cpia *ucpia;
|
| 117 |
|
|
|
| 118 |
|
|
if (!urb || !urb->context)
|
| 119 |
|
|
return;
|
| 120 |
|
|
|
| 121 |
|
|
ucpia = (struct usb_cpia *) urb->context;
|
| 122 |
|
|
|
| 123 |
|
|
if (!ucpia->dev || !ucpia->streaming || !ucpia->present || !ucpia->open)
|
| 124 |
|
|
return;
|
| 125 |
|
|
|
| 126 |
|
|
if (ucpia->workbuff->status == FRAME_EMPTY) {
|
| 127 |
|
|
ucpia->workbuff->status = FRAME_READING;
|
| 128 |
|
|
ucpia->workbuff->length = 0;
|
| 129 |
|
|
}
|
| 130 |
|
|
|
| 131 |
|
|
for (i = 0; i < urb->number_of_packets; i++) {
|
| 132 |
|
|
int n = urb->iso_frame_desc[i].actual_length;
|
| 133 |
|
|
int st = urb->iso_frame_desc[i].status;
|
| 134 |
|
|
|
| 135 |
|
|
cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
|
| 136 |
|
|
|
| 137 |
|
|
if (st)
|
| 138 |
|
|
printk(KERN_DEBUG "cpia data error: [%d] len=%d, status=%X\n", i, n, st);
|
| 139 |
|
|
|
| 140 |
|
|
if (FRAMEBUF_LEN < ucpia->workbuff->length + n) {
|
| 141 |
|
|
printk(KERN_DEBUG "cpia: scratch buf overflow!scr_len: %d, n: %d\n", ucpia->workbuff->length, n);
|
| 142 |
|
|
return;
|
| 143 |
|
|
}
|
| 144 |
|
|
|
| 145 |
|
|
if (n) {
|
| 146 |
|
|
if ((ucpia->workbuff->length > 0) ||
|
| 147 |
|
|
(0x19 == cdata[0] && 0x68 == cdata[1])) {
|
| 148 |
|
|
memcpy(ucpia->workbuff->data + ucpia->workbuff->length, cdata, n);
|
| 149 |
|
|
ucpia->workbuff->length += n;
|
| 150 |
|
|
} else
|
| 151 |
|
|
DBG("Ignoring packet!\n");
|
| 152 |
|
|
} else {
|
| 153 |
|
|
if (ucpia->workbuff->length > 4 &&
|
| 154 |
|
|
0xff == ucpia->workbuff->data[ucpia->workbuff->length-1] &&
|
| 155 |
|
|
0xff == ucpia->workbuff->data[ucpia->workbuff->length-2] &&
|
| 156 |
|
|
0xff == ucpia->workbuff->data[ucpia->workbuff->length-3] &&
|
| 157 |
|
|
0xff == ucpia->workbuff->data[ucpia->workbuff->length-4]) {
|
| 158 |
|
|
ucpia->workbuff->status = FRAME_READY;
|
| 159 |
|
|
ucpia->curbuff = ucpia->workbuff;
|
| 160 |
|
|
ucpia->workbuff = ucpia->workbuff->next;
|
| 161 |
|
|
ucpia->workbuff->status = FRAME_EMPTY;
|
| 162 |
|
|
ucpia->workbuff->length = 0;
|
| 163 |
|
|
|
| 164 |
|
|
if (waitqueue_active(&ucpia->wq_stream))
|
| 165 |
|
|
wake_up_interruptible(&ucpia->wq_stream);
|
| 166 |
|
|
}
|
| 167 |
|
|
}
|
| 168 |
|
|
}
|
| 169 |
|
|
|
| 170 |
|
|
/* resubmit */
|
| 171 |
|
|
urb->dev = ucpia->dev;
|
| 172 |
|
|
if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0)
|
| 173 |
|
|
printk(KERN_ERR "%s: usb_submit_urb ret %d\n", __FUNCTION__, i);
|
| 174 |
|
|
}
|
| 175 |
|
|
|
| 176 |
|
|
static int cpia_usb_open(void *privdata)
|
| 177 |
|
|
{
|
| 178 |
|
|
struct usb_cpia *ucpia = (struct usb_cpia *) privdata;
|
| 179 |
|
|
struct urb *urb;
|
| 180 |
|
|
int ret, retval = 0, fx, err;
|
| 181 |
|
|
|
| 182 |
|
|
if (!ucpia)
|
| 183 |
|
|
return -EINVAL;
|
| 184 |
|
|
|
| 185 |
|
|
ucpia->sbuf[0].data = kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL);
|
| 186 |
|
|
if (!ucpia->sbuf[0].data)
|
| 187 |
|
|
return -EINVAL;
|
| 188 |
|
|
|
| 189 |
|
|
ucpia->sbuf[1].data = kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL);
|
| 190 |
|
|
if (!ucpia->sbuf[1].data) {
|
| 191 |
|
|
retval = -EINVAL;
|
| 192 |
|
|
goto error_0;
|
| 193 |
|
|
}
|
| 194 |
|
|
|
| 195 |
|
|
ret = usb_set_interface(ucpia->dev, ucpia->iface, 3);
|
| 196 |
|
|
if (ret < 0) {
|
| 197 |
|
|
printk(KERN_ERR "cpia_usb_open: usb_set_interface error (ret = %d)\n", ret);
|
| 198 |
|
|
retval = -EBUSY;
|
| 199 |
|
|
goto error_1;
|
| 200 |
|
|
}
|
| 201 |
|
|
|
| 202 |
|
|
ucpia->buffers[0]->status = FRAME_EMPTY;
|
| 203 |
|
|
ucpia->buffers[0]->length = 0;
|
| 204 |
|
|
ucpia->buffers[1]->status = FRAME_EMPTY;
|
| 205 |
|
|
ucpia->buffers[1]->length = 0;
|
| 206 |
|
|
ucpia->buffers[2]->status = FRAME_EMPTY;
|
| 207 |
|
|
ucpia->buffers[2]->length = 0;
|
| 208 |
|
|
ucpia->curbuff = ucpia->buffers[0];
|
| 209 |
|
|
ucpia->workbuff = ucpia->buffers[1];
|
| 210 |
|
|
|
| 211 |
|
|
/* We double buffer the Iso lists, and also know the polling
|
| 212 |
|
|
* interval is every frame (1 == (1 << (bInterval -1))).
|
| 213 |
|
|
*/
|
| 214 |
|
|
urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
|
| 215 |
|
|
if (!urb) {
|
| 216 |
|
|
printk(KERN_ERR "cpia_init_isoc: usb_alloc_urb 0\n");
|
| 217 |
|
|
retval = -ENOMEM;
|
| 218 |
|
|
goto error_1;
|
| 219 |
|
|
}
|
| 220 |
|
|
|
| 221 |
|
|
ucpia->sbuf[0].urb = urb;
|
| 222 |
|
|
urb->dev = ucpia->dev;
|
| 223 |
|
|
urb->context = ucpia;
|
| 224 |
|
|
urb->pipe = usb_rcvisocpipe(ucpia->dev, 1);
|
| 225 |
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
| 226 |
|
|
urb->transfer_buffer = ucpia->sbuf[0].data;
|
| 227 |
|
|
urb->complete = cpia_usb_complete;
|
| 228 |
|
|
urb->number_of_packets = FRAMES_PER_DESC;
|
| 229 |
|
|
urb->interval = 1;
|
| 230 |
|
|
urb->transfer_buffer_length = FRAME_SIZE_PER_DESC * FRAMES_PER_DESC;
|
| 231 |
|
|
for (fx = 0; fx < FRAMES_PER_DESC; fx++) {
|
| 232 |
|
|
urb->iso_frame_desc[fx].offset = FRAME_SIZE_PER_DESC * fx;
|
| 233 |
|
|
urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC;
|
| 234 |
|
|
}
|
| 235 |
|
|
|
| 236 |
|
|
urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
|
| 237 |
|
|
if (!urb) {
|
| 238 |
|
|
printk(KERN_ERR "cpia_init_isoc: usb_alloc_urb 1\n");
|
| 239 |
|
|
retval = -ENOMEM;
|
| 240 |
|
|
goto error_urb0;
|
| 241 |
|
|
}
|
| 242 |
|
|
|
| 243 |
|
|
ucpia->sbuf[1].urb = urb;
|
| 244 |
|
|
urb->dev = ucpia->dev;
|
| 245 |
|
|
urb->context = ucpia;
|
| 246 |
|
|
urb->pipe = usb_rcvisocpipe(ucpia->dev, 1);
|
| 247 |
|
|
urb->transfer_flags = URB_ISO_ASAP;
|
| 248 |
|
|
urb->transfer_buffer = ucpia->sbuf[1].data;
|
| 249 |
|
|
urb->complete = cpia_usb_complete;
|
| 250 |
|
|
urb->number_of_packets = FRAMES_PER_DESC;
|
| 251 |
|
|
urb->interval = 1;
|
| 252 |
|
|
urb->transfer_buffer_length = FRAME_SIZE_PER_DESC * FRAMES_PER_DESC;
|
| 253 |
|
|
for (fx = 0; fx < FRAMES_PER_DESC; fx++) {
|
| 254 |
|
|
urb->iso_frame_desc[fx].offset = FRAME_SIZE_PER_DESC * fx;
|
| 255 |
|
|
urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC;
|
| 256 |
|
|
}
|
| 257 |
|
|
|
| 258 |
|
|
/* queue the ISO urbs, and resubmit in the completion handler */
|
| 259 |
|
|
err = usb_submit_urb(ucpia->sbuf[0].urb, GFP_KERNEL);
|
| 260 |
|
|
if (err) {
|
| 261 |
|
|
printk(KERN_ERR "cpia_init_isoc: usb_submit_urb 0 ret %d\n",
|
| 262 |
|
|
err);
|
| 263 |
|
|
goto error_urb1;
|
| 264 |
|
|
}
|
| 265 |
|
|
err = usb_submit_urb(ucpia->sbuf[1].urb, GFP_KERNEL);
|
| 266 |
|
|
if (err) {
|
| 267 |
|
|
printk(KERN_ERR "cpia_init_isoc: usb_submit_urb 1 ret %d\n",
|
| 268 |
|
|
err);
|
| 269 |
|
|
goto error_urb1;
|
| 270 |
|
|
}
|
| 271 |
|
|
|
| 272 |
|
|
ucpia->streaming = 1;
|
| 273 |
|
|
ucpia->open = 1;
|
| 274 |
|
|
|
| 275 |
|
|
return 0;
|
| 276 |
|
|
|
| 277 |
|
|
error_urb1: /* free urb 1 */
|
| 278 |
|
|
usb_free_urb(ucpia->sbuf[1].urb);
|
| 279 |
|
|
ucpia->sbuf[1].urb = NULL;
|
| 280 |
|
|
error_urb0: /* free urb 0 */
|
| 281 |
|
|
usb_free_urb(ucpia->sbuf[0].urb);
|
| 282 |
|
|
ucpia->sbuf[0].urb = NULL;
|
| 283 |
|
|
error_1:
|
| 284 |
|
|
kfree (ucpia->sbuf[1].data);
|
| 285 |
|
|
ucpia->sbuf[1].data = NULL;
|
| 286 |
|
|
error_0:
|
| 287 |
|
|
kfree (ucpia->sbuf[0].data);
|
| 288 |
|
|
ucpia->sbuf[0].data = NULL;
|
| 289 |
|
|
|
| 290 |
|
|
return retval;
|
| 291 |
|
|
}
|
| 292 |
|
|
|
| 293 |
|
|
//
|
| 294 |
|
|
// convenience functions
|
| 295 |
|
|
//
|
| 296 |
|
|
|
| 297 |
|
|
/****************************************************************************
|
| 298 |
|
|
*
|
| 299 |
|
|
* WritePacket
|
| 300 |
|
|
*
|
| 301 |
|
|
***************************************************************************/
|
| 302 |
|
|
static int WritePacket(struct usb_device *udev, const u8 *packet, u8 *buf, size_t size)
|
| 303 |
|
|
{
|
| 304 |
|
|
if (!packet)
|
| 305 |
|
|
return -EINVAL;
|
| 306 |
|
|
|
| 307 |
|
|
return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
|
| 308 |
|
|
packet[1] + (packet[0] << 8),
|
| 309 |
|
|
USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
| 310 |
|
|
packet[2] + (packet[3] << 8),
|
| 311 |
|
|
packet[4] + (packet[5] << 8), buf, size, 1000);
|
| 312 |
|
|
}
|
| 313 |
|
|
|
| 314 |
|
|
/****************************************************************************
|
| 315 |
|
|
*
|
| 316 |
|
|
* ReadPacket
|
| 317 |
|
|
*
|
| 318 |
|
|
***************************************************************************/
|
| 319 |
|
|
static int ReadPacket(struct usb_device *udev, u8 *packet, u8 *buf, size_t size)
|
| 320 |
|
|
{
|
| 321 |
|
|
if (!packet || size <= 0)
|
| 322 |
|
|
return -EINVAL;
|
| 323 |
|
|
|
| 324 |
|
|
return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
|
| 325 |
|
|
packet[1] + (packet[0] << 8),
|
| 326 |
|
|
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
| 327 |
|
|
packet[2] + (packet[3] << 8),
|
| 328 |
|
|
packet[4] + (packet[5] << 8), buf, size, 1000);
|
| 329 |
|
|
}
|
| 330 |
|
|
|
| 331 |
|
|
static int cpia_usb_transferCmd(void *privdata, u8 *command, u8 *data)
|
| 332 |
|
|
{
|
| 333 |
|
|
int err = 0;
|
| 334 |
|
|
int databytes;
|
| 335 |
|
|
struct usb_cpia *ucpia = (struct usb_cpia *)privdata;
|
| 336 |
|
|
struct usb_device *udev = ucpia->dev;
|
| 337 |
|
|
|
| 338 |
|
|
if (!udev) {
|
| 339 |
|
|
DBG("Internal driver error: udev is NULL\n");
|
| 340 |
|
|
return -EINVAL;
|
| 341 |
|
|
}
|
| 342 |
|
|
|
| 343 |
|
|
if (!command) {
|
| 344 |
|
|
DBG("Internal driver error: command is NULL\n");
|
| 345 |
|
|
return -EINVAL;
|
| 346 |
|
|
}
|
| 347 |
|
|
|
| 348 |
|
|
databytes = (((int)command[7])<<8) | command[6];
|
| 349 |
|
|
|
| 350 |
|
|
if (command[0] == DATA_IN) {
|
| 351 |
|
|
u8 buffer[8];
|
| 352 |
|
|
|
| 353 |
|
|
if (!data) {
|
| 354 |
|
|
DBG("Internal driver error: data is NULL\n");
|
| 355 |
|
|
return -EINVAL;
|
| 356 |
|
|
}
|
| 357 |
|
|
|
| 358 |
|
|
err = ReadPacket(udev, command, buffer, 8);
|
| 359 |
|
|
if (err < 0)
|
| 360 |
|
|
return err;
|
| 361 |
|
|
|
| 362 |
|
|
memcpy(data, buffer, databytes);
|
| 363 |
|
|
} else if(command[0] == DATA_OUT)
|
| 364 |
|
|
WritePacket(udev, command, data, databytes);
|
| 365 |
|
|
else {
|
| 366 |
|
|
DBG("Unexpected first byte of command: %x\n", command[0]);
|
| 367 |
|
|
err = -EINVAL;
|
| 368 |
|
|
}
|
| 369 |
|
|
|
| 370 |
|
|
return 0;
|
| 371 |
|
|
}
|
| 372 |
|
|
|
| 373 |
|
|
static int cpia_usb_registerCallback(void *privdata, void (*cb) (void *cbdata),
|
| 374 |
|
|
void *cbdata)
|
| 375 |
|
|
{
|
| 376 |
|
|
return -ENODEV;
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
static int cpia_usb_streamStart(void *privdata)
|
| 380 |
|
|
{
|
| 381 |
|
|
return -ENODEV;
|
| 382 |
|
|
}
|
| 383 |
|
|
|
| 384 |
|
|
static int cpia_usb_streamStop(void *privdata)
|
| 385 |
|
|
{
|
| 386 |
|
|
return -ENODEV;
|
| 387 |
|
|
}
|
| 388 |
|
|
|
| 389 |
|
|
static int cpia_usb_streamRead(void *privdata, u8 *frame, int noblock)
|
| 390 |
|
|
{
|
| 391 |
|
|
struct usb_cpia *ucpia = (struct usb_cpia *) privdata;
|
| 392 |
|
|
struct framebuf *mybuff;
|
| 393 |
|
|
|
| 394 |
|
|
if (!ucpia || !ucpia->present)
|
| 395 |
|
|
return -1;
|
| 396 |
|
|
|
| 397 |
|
|
if (ucpia->curbuff->status != FRAME_READY)
|
| 398 |
|
|
interruptible_sleep_on(&ucpia->wq_stream);
|
| 399 |
|
|
else
|
| 400 |
|
|
DBG("Frame already waiting!\n");
|
| 401 |
|
|
|
| 402 |
|
|
mybuff = ucpia->curbuff;
|
| 403 |
|
|
|
| 404 |
|
|
if (!mybuff)
|
| 405 |
|
|
return -1;
|
| 406 |
|
|
|
| 407 |
|
|
if (mybuff->status != FRAME_READY || mybuff->length < 4) {
|
| 408 |
|
|
DBG("Something went wrong!\n");
|
| 409 |
|
|
return -1;
|
| 410 |
|
|
}
|
| 411 |
|
|
|
| 412 |
|
|
memcpy(frame, mybuff->data, mybuff->length);
|
| 413 |
|
|
mybuff->status = FRAME_EMPTY;
|
| 414 |
|
|
|
| 415 |
|
|
/* DBG("read done, %d bytes, Header: %x/%x, Footer: %x%x%x%x\n", */
|
| 416 |
|
|
/* mybuff->length, frame[0], frame[1], */
|
| 417 |
|
|
/* frame[mybuff->length-4], frame[mybuff->length-3], */
|
| 418 |
|
|
/* frame[mybuff->length-2], frame[mybuff->length-1]); */
|
| 419 |
|
|
|
| 420 |
|
|
return mybuff->length;
|
| 421 |
|
|
}
|
| 422 |
|
|
|
| 423 |
|
|
static void cpia_usb_free_resources(struct usb_cpia *ucpia, int try)
|
| 424 |
|
|
{
|
| 425 |
|
|
if (!ucpia->streaming)
|
| 426 |
|
|
return;
|
| 427 |
|
|
|
| 428 |
|
|
ucpia->streaming = 0;
|
| 429 |
|
|
|
| 430 |
|
|
/* Set packet size to 0 */
|
| 431 |
|
|
if (try) {
|
| 432 |
|
|
int ret;
|
| 433 |
|
|
|
| 434 |
|
|
ret = usb_set_interface(ucpia->dev, ucpia->iface, 0);
|
| 435 |
|
|
if (ret < 0) {
|
| 436 |
|
|
printk(KERN_ERR "usb_set_interface error (ret = %d)\n", ret);
|
| 437 |
|
|
return;
|
| 438 |
|
|
}
|
| 439 |
|
|
}
|
| 440 |
|
|
|
| 441 |
|
|
/* Unschedule all of the iso td's */
|
| 442 |
|
|
if (ucpia->sbuf[1].urb) {
|
| 443 |
|
|
usb_kill_urb(ucpia->sbuf[1].urb);
|
| 444 |
|
|
usb_free_urb(ucpia->sbuf[1].urb);
|
| 445 |
|
|
ucpia->sbuf[1].urb = NULL;
|
| 446 |
|
|
}
|
| 447 |
|
|
|
| 448 |
|
|
kfree(ucpia->sbuf[1].data);
|
| 449 |
|
|
ucpia->sbuf[1].data = NULL;
|
| 450 |
|
|
|
| 451 |
|
|
if (ucpia->sbuf[0].urb) {
|
| 452 |
|
|
usb_kill_urb(ucpia->sbuf[0].urb);
|
| 453 |
|
|
usb_free_urb(ucpia->sbuf[0].urb);
|
| 454 |
|
|
ucpia->sbuf[0].urb = NULL;
|
| 455 |
|
|
}
|
| 456 |
|
|
|
| 457 |
|
|
kfree(ucpia->sbuf[0].data);
|
| 458 |
|
|
ucpia->sbuf[0].data = NULL;
|
| 459 |
|
|
}
|
| 460 |
|
|
|
| 461 |
|
|
static int cpia_usb_close(void *privdata)
|
| 462 |
|
|
{
|
| 463 |
|
|
struct usb_cpia *ucpia = (struct usb_cpia *) privdata;
|
| 464 |
|
|
|
| 465 |
|
|
if(!ucpia)
|
| 466 |
|
|
return -ENODEV;
|
| 467 |
|
|
|
| 468 |
|
|
ucpia->open = 0;
|
| 469 |
|
|
|
| 470 |
|
|
/* ucpia->present = 0 protects against trying to reset the
|
| 471 |
|
|
* alt setting if camera is physically disconnected while open */
|
| 472 |
|
|
cpia_usb_free_resources(ucpia, ucpia->present);
|
| 473 |
|
|
|
| 474 |
|
|
return 0;
|
| 475 |
|
|
}
|
| 476 |
|
|
|
| 477 |
|
|
/* Probing and initializing */
|
| 478 |
|
|
|
| 479 |
|
|
static int cpia_probe(struct usb_interface *intf,
|
| 480 |
|
|
const struct usb_device_id *id)
|
| 481 |
|
|
{
|
| 482 |
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
| 483 |
|
|
struct usb_host_interface *interface;
|
| 484 |
|
|
struct usb_cpia *ucpia;
|
| 485 |
|
|
struct cam_data *cam;
|
| 486 |
|
|
int ret;
|
| 487 |
|
|
|
| 488 |
|
|
/* A multi-config CPiA camera? */
|
| 489 |
|
|
if (udev->descriptor.bNumConfigurations != 1)
|
| 490 |
|
|
return -ENODEV;
|
| 491 |
|
|
|
| 492 |
|
|
interface = intf->cur_altsetting;
|
| 493 |
|
|
|
| 494 |
|
|
printk(KERN_INFO "USB CPiA camera found\n");
|
| 495 |
|
|
|
| 496 |
|
|
ucpia = kzalloc(sizeof(*ucpia), GFP_KERNEL);
|
| 497 |
|
|
if (!ucpia) {
|
| 498 |
|
|
printk(KERN_ERR "couldn't kmalloc cpia struct\n");
|
| 499 |
|
|
return -ENOMEM;
|
| 500 |
|
|
}
|
| 501 |
|
|
|
| 502 |
|
|
ucpia->dev = udev;
|
| 503 |
|
|
ucpia->iface = interface->desc.bInterfaceNumber;
|
| 504 |
|
|
init_waitqueue_head(&ucpia->wq_stream);
|
| 505 |
|
|
|
| 506 |
|
|
ucpia->buffers[0] = vmalloc(sizeof(*ucpia->buffers[0]));
|
| 507 |
|
|
if (!ucpia->buffers[0]) {
|
| 508 |
|
|
printk(KERN_ERR "couldn't vmalloc frame buffer 0\n");
|
| 509 |
|
|
goto fail_alloc_0;
|
| 510 |
|
|
}
|
| 511 |
|
|
|
| 512 |
|
|
ucpia->buffers[1] = vmalloc(sizeof(*ucpia->buffers[1]));
|
| 513 |
|
|
if (!ucpia->buffers[1]) {
|
| 514 |
|
|
printk(KERN_ERR "couldn't vmalloc frame buffer 1\n");
|
| 515 |
|
|
goto fail_alloc_1;
|
| 516 |
|
|
}
|
| 517 |
|
|
|
| 518 |
|
|
ucpia->buffers[2] = vmalloc(sizeof(*ucpia->buffers[2]));
|
| 519 |
|
|
if (!ucpia->buffers[2]) {
|
| 520 |
|
|
printk(KERN_ERR "couldn't vmalloc frame buffer 2\n");
|
| 521 |
|
|
goto fail_alloc_2;
|
| 522 |
|
|
}
|
| 523 |
|
|
|
| 524 |
|
|
ucpia->buffers[0]->next = ucpia->buffers[1];
|
| 525 |
|
|
ucpia->buffers[1]->next = ucpia->buffers[2];
|
| 526 |
|
|
ucpia->buffers[2]->next = ucpia->buffers[0];
|
| 527 |
|
|
|
| 528 |
|
|
ret = usb_set_interface(udev, ucpia->iface, 0);
|
| 529 |
|
|
if (ret < 0) {
|
| 530 |
|
|
printk(KERN_ERR "cpia_probe: usb_set_interface error (ret = %d)\n", ret);
|
| 531 |
|
|
/* goto fail_all; */
|
| 532 |
|
|
}
|
| 533 |
|
|
|
| 534 |
|
|
/* Before register_camera, important */
|
| 535 |
|
|
ucpia->present = 1;
|
| 536 |
|
|
|
| 537 |
|
|
cam = cpia_register_camera(&cpia_usb_ops, ucpia);
|
| 538 |
|
|
if (!cam) {
|
| 539 |
|
|
LOG("failed to cpia_register_camera\n");
|
| 540 |
|
|
goto fail_all;
|
| 541 |
|
|
}
|
| 542 |
|
|
|
| 543 |
|
|
spin_lock( &cam_list_lock_usb );
|
| 544 |
|
|
list_add( &cam->cam_data_list, &cam_list );
|
| 545 |
|
|
spin_unlock( &cam_list_lock_usb );
|
| 546 |
|
|
|
| 547 |
|
|
usb_set_intfdata(intf, cam);
|
| 548 |
|
|
return 0;
|
| 549 |
|
|
|
| 550 |
|
|
fail_all:
|
| 551 |
|
|
vfree(ucpia->buffers[2]);
|
| 552 |
|
|
ucpia->buffers[2] = NULL;
|
| 553 |
|
|
fail_alloc_2:
|
| 554 |
|
|
vfree(ucpia->buffers[1]);
|
| 555 |
|
|
ucpia->buffers[1] = NULL;
|
| 556 |
|
|
fail_alloc_1:
|
| 557 |
|
|
vfree(ucpia->buffers[0]);
|
| 558 |
|
|
ucpia->buffers[0] = NULL;
|
| 559 |
|
|
fail_alloc_0:
|
| 560 |
|
|
kfree(ucpia);
|
| 561 |
|
|
return -EIO;
|
| 562 |
|
|
}
|
| 563 |
|
|
|
| 564 |
|
|
static void cpia_disconnect(struct usb_interface *intf);
|
| 565 |
|
|
|
| 566 |
|
|
static struct usb_device_id cpia_id_table [] = {
|
| 567 |
|
|
{ USB_DEVICE(0x0553, 0x0002) },
|
| 568 |
|
|
{ USB_DEVICE(0x0813, 0x0001) },
|
| 569 |
|
|
{ } /* Terminating entry */
|
| 570 |
|
|
};
|
| 571 |
|
|
|
| 572 |
|
|
MODULE_DEVICE_TABLE (usb, cpia_id_table);
|
| 573 |
|
|
MODULE_LICENSE("GPL");
|
| 574 |
|
|
|
| 575 |
|
|
|
| 576 |
|
|
static struct usb_driver cpia_driver = {
|
| 577 |
|
|
.name = "cpia",
|
| 578 |
|
|
.probe = cpia_probe,
|
| 579 |
|
|
.disconnect = cpia_disconnect,
|
| 580 |
|
|
.id_table = cpia_id_table,
|
| 581 |
|
|
};
|
| 582 |
|
|
|
| 583 |
|
|
static void cpia_disconnect(struct usb_interface *intf)
|
| 584 |
|
|
{
|
| 585 |
|
|
struct cam_data *cam = usb_get_intfdata(intf);
|
| 586 |
|
|
struct usb_cpia *ucpia;
|
| 587 |
|
|
struct usb_device *udev;
|
| 588 |
|
|
|
| 589 |
|
|
usb_set_intfdata(intf, NULL);
|
| 590 |
|
|
if (!cam)
|
| 591 |
|
|
return;
|
| 592 |
|
|
|
| 593 |
|
|
ucpia = (struct usb_cpia *) cam->lowlevel_data;
|
| 594 |
|
|
spin_lock( &cam_list_lock_usb );
|
| 595 |
|
|
list_del(&cam->cam_data_list);
|
| 596 |
|
|
spin_unlock( &cam_list_lock_usb );
|
| 597 |
|
|
|
| 598 |
|
|
ucpia->present = 0;
|
| 599 |
|
|
|
| 600 |
|
|
cpia_unregister_camera(cam);
|
| 601 |
|
|
if(ucpia->open)
|
| 602 |
|
|
cpia_usb_close(cam->lowlevel_data);
|
| 603 |
|
|
|
| 604 |
|
|
ucpia->curbuff->status = FRAME_ERROR;
|
| 605 |
|
|
|
| 606 |
|
|
if (waitqueue_active(&ucpia->wq_stream))
|
| 607 |
|
|
wake_up_interruptible(&ucpia->wq_stream);
|
| 608 |
|
|
|
| 609 |
|
|
udev = interface_to_usbdev(intf);
|
| 610 |
|
|
|
| 611 |
|
|
ucpia->curbuff = ucpia->workbuff = NULL;
|
| 612 |
|
|
|
| 613 |
|
|
vfree(ucpia->buffers[2]);
|
| 614 |
|
|
ucpia->buffers[2] = NULL;
|
| 615 |
|
|
|
| 616 |
|
|
vfree(ucpia->buffers[1]);
|
| 617 |
|
|
ucpia->buffers[1] = NULL;
|
| 618 |
|
|
|
| 619 |
|
|
vfree(ucpia->buffers[0]);
|
| 620 |
|
|
ucpia->buffers[0] = NULL;
|
| 621 |
|
|
|
| 622 |
|
|
cam->lowlevel_data = NULL;
|
| 623 |
|
|
kfree(ucpia);
|
| 624 |
|
|
}
|
| 625 |
|
|
|
| 626 |
|
|
static int __init usb_cpia_init(void)
|
| 627 |
|
|
{
|
| 628 |
|
|
printk(KERN_INFO "%s v%d.%d.%d\n",ABOUT,
|
| 629 |
|
|
CPIA_USB_MAJ_VER,CPIA_USB_MIN_VER,CPIA_USB_PATCH_VER);
|
| 630 |
|
|
|
| 631 |
|
|
spin_lock_init(&cam_list_lock_usb);
|
| 632 |
|
|
return usb_register(&cpia_driver);
|
| 633 |
|
|
}
|
| 634 |
|
|
|
| 635 |
|
|
static void __exit usb_cpia_cleanup(void)
|
| 636 |
|
|
{
|
| 637 |
|
|
usb_deregister(&cpia_driver);
|
| 638 |
|
|
}
|
| 639 |
|
|
|
| 640 |
|
|
|
| 641 |
|
|
module_init (usb_cpia_init);
|
| 642 |
|
|
module_exit (usb_cpia_cleanup);
|
| 643 |
|
|
|
