USB and Video4Linux interface part.
(C) 1999-2004 Nemosoft Unv.
(C) 2004-2006 Luc Saillard (luc@saillard.org)
+ (C) 2011 Hans de Goede <hdegoede@redhat.com>
NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
driver and thus may have bugs that are not present in the original version.
#define MAX_DEV_HINTS 20
#define MAX_ISOC_ERRORS 20
-static int default_size = PSZ_QCIF;
static int default_fps = 10;
#ifdef CONFIG_USB_PWC_DEBUG
int pwc_trace = PWC_DEBUG_LEVEL;
/***************************************************************************/
/* Private functions */
-static int pwc_allocate_buffers(struct pwc_device *pdev)
-{
- int i, err;
- void *kbuf;
-
- PWC_DEBUG_MEMORY(">> pwc_allocate_buffers(pdev = 0x%p)\n", pdev);
-
- /* Allocate Isochronuous pipe buffers */
- for (i = 0; i < MAX_ISO_BUFS; i++) {
- if (pdev->sbuf[i].data == NULL) {
- kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
- if (kbuf == NULL) {
- PWC_ERROR("Failed to allocate iso buffer %d.\n", i);
- return -ENOMEM;
- }
- PWC_DEBUG_MEMORY("Allocated iso buffer at %p.\n", kbuf);
- pdev->sbuf[i].data = kbuf;
- }
- }
-
- /* Allocate decompressor table space */
- if (DEVICE_USE_CODEC1(pdev->type))
- err = pwc_dec1_alloc(pdev);
- else
- err = pwc_dec23_alloc(pdev);
-
- if (err) {
- PWC_ERROR("Failed to allocate decompress table.\n");
- return err;
- }
-
- PWC_DEBUG_MEMORY("<< pwc_allocate_buffers()\n");
- return 0;
-}
-
-static void pwc_free_buffers(struct pwc_device *pdev)
-{
- int i;
-
- PWC_DEBUG_MEMORY("Entering free_buffers(%p).\n", pdev);
-
- /* Release Iso-pipe buffers */
- for (i = 0; i < MAX_ISO_BUFS; i++)
- if (pdev->sbuf[i].data != NULL) {
- PWC_DEBUG_MEMORY("Freeing ISO buffer at %p.\n", pdev->sbuf[i].data);
- kfree(pdev->sbuf[i].data);
- pdev->sbuf[i].data = NULL;
- }
-
- /* Intermediate decompression buffer & tables */
- if (pdev->decompress_data != NULL) {
- PWC_DEBUG_MEMORY("Freeing decompression buffer at %p.\n", pdev->decompress_data);
- kfree(pdev->decompress_data);
- pdev->decompress_data = NULL;
- }
-
- PWC_DEBUG_MEMORY("Leaving free_buffers().\n");
-}
-
struct pwc_frame_buf *pwc_get_next_fill_buf(struct pwc_device *pdev)
{
unsigned long flags = 0;
int i, j, ret;
struct usb_interface *intf;
struct usb_host_interface *idesc = NULL;
+ void *kbuf;
if (pdev->iso_init)
return 0;
+
pdev->vsync = 0;
+ pdev->vlast_packet_size = 0;
pdev->fill_buf = NULL;
pdev->vframe_count = 0;
+ pdev->visoc_errors = 0;
udev = pdev->udev;
/* Get the current alternate interface, adjust packet size */
if (ret < 0)
return ret;
+ /* Allocate Isochronuous pipe buffers */
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ kbuf = kzalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
+ if (kbuf == NULL) {
+ PWC_ERROR("Failed to allocate iso buffer %d.\n", i);
+ pdev->iso_init = 1;
+ pwc_isoc_cleanup(pdev);
+ return -ENOMEM;
+ }
+ PWC_DEBUG_MEMORY("Allocated iso buffer at %p.\n", kbuf);
+ pdev->sbuf[i].data = kbuf;
+ }
+
+ /* Allocate Isochronuous urbs */
for (i = 0; i < MAX_ISO_BUFS; i++) {
urb = usb_alloc_urb(ISO_FRAMES_PER_DESC, GFP_KERNEL);
if (urb == NULL) {
PWC_ERROR("Failed to allocate urb %d\n", i);
- ret = -ENOMEM;
- break;
+ pdev->iso_init = 1;
+ pwc_isoc_cleanup(pdev);
+ return -ENOMEM;
}
pdev->sbuf[i].urb = urb;
PWC_DEBUG_MEMORY("Allocated URB at 0x%p\n", urb);
}
- if (ret) {
- /* De-allocate in reverse order */
- while (i--) {
- usb_free_urb(pdev->sbuf[i].urb);
- pdev->sbuf[i].urb = NULL;
- }
- return ret;
- }
/* init URB structure */
for (i = 0; i < MAX_ISO_BUFS; i++) {
static void pwc_isoc_cleanup(struct pwc_device *pdev)
{
+ int i;
+
PWC_DEBUG_OPEN(">> pwc_isoc_cleanup()\n");
if (pdev->iso_init == 0)
pwc_iso_free(pdev);
usb_set_interface(pdev->udev, 0, 0);
+ /* Release Iso-pipe buffers */
+ for (i = 0; i < MAX_ISO_BUFS; i++) {
+ if (pdev->sbuf[i].data != NULL) {
+ PWC_DEBUG_MEMORY("Freeing ISO buffer at %p.\n",
+ pdev->sbuf[i].data);
+ kfree(pdev->sbuf[i].data);
+ pdev->sbuf[i].data = NULL;
+ }
+ }
+
pdev->iso_init = 0;
PWC_DEBUG_OPEN("<< pwc_isoc_cleanup()\n");
}
static int pwc_video_open(struct file *file)
{
- int i, ret;
struct video_device *vdev = video_devdata(file);
struct pwc_device *pdev;
return -EBUSY;
}
- if (!pdev->usb_init) {
- PWC_DEBUG_OPEN("Doing first time initialization.\n");
- pdev->usb_init = 1;
-
- /* Query sensor type */
- ret = pwc_get_cmos_sensor(pdev, &i);
- if (ret >= 0)
- {
- PWC_DEBUG_OPEN("This %s camera is equipped with a %s (%d).\n",
- pdev->vdev.name,
- pwc_sensor_type_to_string(i), i);
- }
- }
-
- /* Turn on camera and set LEDS on */
- pwc_camera_power(pdev, 1);
- pwc_set_leds(pdev, led_on, led_off);
-
- /* So far, so good. Allocate memory. */
- i = pwc_allocate_buffers(pdev);
- if (i < 0) {
- PWC_DEBUG_OPEN("Failed to allocate buffers memory.\n");
- pwc_free_buffers(pdev);
- return i;
- }
-
- /* Reset buffers & parameters */
- pdev->visoc_errors = 0;
-
- /* Set some defaults */
- pdev->vsnapshot = 0;
-
- /* Set video size, first try the last used video size
- (or the default one); if that fails try QCIF/10 or QSIF/10;
- it that fails too, give up.
- */
- i = pwc_set_video_mode(pdev, pwc_image_sizes[pdev->vsize].x, pwc_image_sizes[pdev->vsize].y, pdev->vframes, pdev->vcompression, 0);
- if (i) {
- unsigned int default_resolution;
- PWC_DEBUG_OPEN("First attempt at set_video_mode failed.\n");
- if (pdev->type>= 730)
- default_resolution = PSZ_QSIF;
- else
- default_resolution = PSZ_QCIF;
-
- i = pwc_set_video_mode(pdev,
- pwc_image_sizes[default_resolution].x,
- pwc_image_sizes[default_resolution].y,
- 10,
- pdev->vcompression,
- 0);
- }
- if (i) {
- PWC_DEBUG_OPEN("Second attempt at set_video_mode failed.\n");
- pwc_free_buffers(pdev);
- return i;
- }
-
- /* Initialize the webcam to sane value */
- pwc_set_brightness(pdev, 0x7fff);
- pwc_set_agc(pdev, 1, 0);
-
pdev->vopen++;
file->private_data = vdev;
PWC_DEBUG_OPEN("<< video_open() returns 0.\n");
if (device_hint[hint].pdev == pdev)
device_hint[hint].pdev = NULL;
+ /* Free intermediate decompression buffer & tables */
+ if (pdev->decompress_data != NULL) {
+ PWC_DEBUG_MEMORY("Freeing decompression buffer at %p.\n",
+ pdev->decompress_data);
+ kfree(pdev->decompress_data);
+ pdev->decompress_data = NULL;
+ }
+
kfree(pdev);
}
-/* Note that all cleanup is done in the reverse order as in _open */
static int pwc_video_close(struct file *file)
{
struct video_device *vdev = file->private_data;
PWC_DEBUG_OPEN(">> video_close called(vdev = 0x%p).\n", vdev);
pdev = video_get_drvdata(vdev);
- if (pdev->vopen == 0)
- PWC_DEBUG_MODULE("video_close() called on closed device?\n");
-
- if (DEVICE_USE_CODEC1(pdev->type))
- pwc_dec1_exit();
- else
- pwc_dec23_exit();
-
vb2_queue_release(&pdev->vb_queue);
- pwc_free_buffers(pdev);
-
- /* Turn off LEDS and power down camera, but only when not unplugged */
- if (pdev->udev) {
- pwc_set_leds(pdev, 0, 0);
- pwc_camera_power(pdev, 0);
- pdev->vopen--;
- PWC_DEBUG_OPEN("<< video_close() vopen=%d\n", pdev->vopen);
- }
+ pdev->vopen--;
+ PWC_DEBUG_OPEN("<< video_close() vopen=%d\n", pdev->vopen);
return 0;
}
if (!pdev->udev)
return -ENODEV;
+ /* Turn on camera and set LEDS on */
+ pwc_camera_power(pdev, 1);
+ if (pdev->power_save) {
+ /* Restore video mode */
+ pwc_set_video_mode(pdev, pdev->view.x, pdev->view.y,
+ pdev->vframes, pdev->vcompression,
+ pdev->vsnapshot);
+ }
+ pwc_set_leds(pdev, led_on, led_off);
+
return pwc_isoc_init(pdev);
}
{
struct pwc_device *pdev = vb2_get_drv_priv(vq);
- if (pdev->udev)
+ if (pdev->udev) {
+ pwc_set_leds(pdev, 0, 0);
+ pwc_camera_power(pdev, 0);
pwc_isoc_cleanup(pdev);
+ }
pwc_cleanup_queued_bufs(pdev);
return 0;
return -ENOMEM;
}
pdev->type = type_id;
- pdev->vsize = default_size;
pdev->vframes = default_fps;
strcpy(pdev->serial, serial_number);
pdev->features = features;
PWC_DEBUG_PROBE("probe() function returning struct at 0x%p.\n", pdev);
usb_set_intfdata(intf, pdev);
+#ifdef CONFIG_USB_PWC_DEBUG
+ /* Query sensor type */
+ if (pwc_get_cmos_sensor(pdev, &rc) >= 0) {
+ PWC_DEBUG_OPEN("This %s camera is equipped with a %s (%d).\n",
+ pdev->vdev.name,
+ pwc_sensor_type_to_string(rc), rc);
+ }
+#endif
+
/* Set the leds off */
pwc_set_leds(pdev, 0, 0);
+
+ /* Setup intial videomode */
+ rc = pwc_set_video_mode(pdev, pdev->view_max.x, pdev->view_max.y,
+ pdev->vframes, pdev->vcompression, 0);
+ if (rc)
+ goto err_free_mem;
+
+ /* Initialize the webcam to sane values */
+ pwc_set_brightness(pdev, 0x7fff);
+ pwc_set_agc(pdev, 1, 0);
+
+ /* And powerdown the camera until streaming starts */
pwc_camera_power(pdev, 0);
rc = video_register_device(&pdev->vdev, VFL_TYPE_GRABBER, video_nr);
* Initialization code & module stuff
*/
-static char *size;
static int fps;
static int compression = -1;
static int leds[2] = { -1, -1 };
static char *dev_hint[MAX_DEV_HINTS];
static unsigned int dev_hint_nargs;
-module_param(size, charp, 0444);
module_param(fps, int, 0444);
#ifdef CONFIG_USB_PWC_DEBUG
module_param_named(trace, pwc_trace, int, 0644);
module_param_array(leds, int, &leds_nargs, 0444);
module_param_array(dev_hint, charp, &dev_hint_nargs, 0444);
-MODULE_PARM_DESC(size, "Initial image size. One of sqcif, qsif, qcif, sif, cif, vga");
MODULE_PARM_DESC(fps, "Initial frames per second. Varies with model, useful range 5-30");
#ifdef CONFIG_USB_PWC_DEBUG
MODULE_PARM_DESC(trace, "For debugging purposes");
static int __init usb_pwc_init(void)
{
- int i, sz;
- char *sizenames[PSZ_MAX] = { "sqcif", "qsif", "qcif", "sif", "cif", "vga" };
+ int i;
+#ifdef CONFIG_USB_PWC_DEBUG
PWC_INFO("Philips webcam module version " PWC_VERSION " loaded.\n");
PWC_INFO("Supports Philips PCA645/646, PCVC675/680/690, PCVC720[40]/730/740/750 & PCVC830/840.\n");
PWC_INFO("Also supports the Askey VC010, various Logitech Quickcams, Samsung MPC-C10 and MPC-C30,\n");
PWC_INFO("the Creative WebCam 5 & Pro Ex, SOTEC Afina Eye and Visionite VCS-UC300 and VCS-UM100.\n");
+ if (pwc_trace >= 0) {
+ PWC_DEBUG_MODULE("Trace options: 0x%04x\n", pwc_trace);
+ }
+#endif
+
if (fps) {
if (fps < 4 || fps > 30) {
PWC_ERROR("Framerate out of bounds (4-30).\n");
PWC_DEBUG_MODULE("Default framerate set to %d.\n", default_fps);
}
- if (size) {
- /* string; try matching with array */
- for (sz = 0; sz < PSZ_MAX; sz++) {
- if (!strcmp(sizenames[sz], size)) { /* Found! */
- default_size = sz;
- break;
- }
- }
- if (sz == PSZ_MAX) {
- PWC_ERROR("Size not recognized; try size=[sqcif | qsif | qcif | sif | cif | vga].\n");
- return -EINVAL;
- }
- PWC_DEBUG_MODULE("Default image size set to %s [%dx%d].\n", sizenames[default_size], pwc_image_sizes[default_size].x, pwc_image_sizes[default_size].y);
- }
-#ifdef CONFIG_USB_PWC_DEBUG
- if (pwc_trace >= 0) {
- PWC_DEBUG_MODULE("Trace options: 0x%04x\n", pwc_trace);
- }
-#endif
if (compression >= 0) {
if (compression > 3) {
PWC_ERROR("Invalid compression setting; use a number between 0 (uncompressed) and 3 (high).\n");
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