Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/usb/media/stv680.c b/drivers/usb/media/stv680.c
new file mode 100644
index 0000000..ae455c8
--- /dev/null
+++ b/drivers/usb/media/stv680.c
@@ -0,0 +1,1506 @@
+/*
+ * STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
+ *
+ * Thanks to STMicroelectronics for information on the usb commands, and
+ * to Steve Miller at STM for his help and encouragement while I was
+ * writing this driver.
+ *
+ * This driver is based heavily on the
+ * Endpoints (formerly known as AOX) se401 USB Camera Driver
+ * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
+ *
+ * Still somewhat based on the Linux ov511 driver.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * History:
+ * ver 0.1 October, 2001. Initial attempt.
+ *
+ * ver 0.2 November, 2001. Fixed asbility to resize, added brightness
+ * function, made more stable (?)
+ *
+ * ver 0.21 Nov, 2001. Added gamma correction and white balance,
+ * due to Alexander Schwartz. Still trying to
+ * improve stablility. Moved stuff into stv680.h
+ *
+ * ver 0.22 Nov, 2001. Added sharpen function (by Michael Sweet,
+ * mike@easysw.com) from GIMP, also used in pencam.
+ * Simple, fast, good integer math routine.
+ *
+ * ver 0.23 Dec, 2001 (gkh)
+ * Took out sharpen function, ran code through
+ * Lindent, and did other minor tweaks to get
+ * things to work properly with 2.5.1
+ *
+ * ver 0.24 Jan, 2002 (kjs)
+ * Fixed the problem with webcam crashing after
+ * two pictures. Changed the way pic is halved to
+ * improve quality. Got rid of green line around
+ * frame. Fix brightness reset when changing size
+ * bug. Adjusted gamma filters slightly.
+ *
+ * ver 0.25 Jan, 2002 (kjs)
+ * Fixed a bug in which the driver sometimes attempted
+ * to set to a non-supported size. This allowed
+ * gnomemeeting to work.
+ * Fixed proc entry removal bug.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/errno.h>
+#include <linux/videodev.h>
+#include <linux/usb.h>
+
+#include "stv680.h"
+
+static int video_nr = -1;
+static int swapRGB = 0; /* default for auto sleect */
+static int swapRGB_on = 0; /* default to allow auto select; -1=swap never, +1= swap always */
+
+static unsigned int debug = 0;
+
+#define PDEBUG(level, fmt, args...) \
+ do { \
+ if (debug >= level) \
+ info("[%s:%d] " fmt, __FUNCTION__, __LINE__ , ## args); \
+ } while (0)
+
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.25"
+#define DRIVER_AUTHOR "Kevin Sisson <kjsisson@bellsouth.net>"
+#define DRIVER_DESC "STV0680 USB Camera Driver"
+
+MODULE_AUTHOR (DRIVER_AUTHOR);
+MODULE_DESCRIPTION (DRIVER_DESC);
+MODULE_LICENSE ("GPL");
+module_param(debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC (debug, "Debug enabled or not");
+module_param(swapRGB_on, int, 0);
+MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never");
+module_param(video_nr, int, 0);
+
+/********************************************************************
+ *
+ * Memory management
+ *
+ * This is a shameless copy from the USB-cpia driver (linux kernel
+ * version 2.3.29 or so, I have no idea what this code actually does ;).
+ * Actually it seems to be a copy of a shameless copy of the bttv-driver.
+ * Or that is a copy of a shameless copy of ... (To the powers: is there
+ * no generic kernel-function to do this sort of stuff?)
+ *
+ * Yes, it was a shameless copy from the bttv-driver. IIRC, Alan says
+ * there will be one, but apparentely not yet -jerdfelt
+ *
+ * So I copied it again for the ov511 driver -claudio
+ *
+ * Same for the se401 driver -Jeroen
+ *
+ * And the STV0680 driver - Kevin
+ ********************************************************************/
+static void *rvmalloc (unsigned long size)
+{
+ void *mem;
+ unsigned long adr;
+
+ size = PAGE_ALIGN(size);
+ mem = vmalloc_32 (size);
+ if (!mem)
+ return NULL;
+
+ memset (mem, 0, size); /* Clear the ram out, no junk to the user */
+ adr = (unsigned long) mem;
+ while (size > 0) {
+ SetPageReserved(vmalloc_to_page((void *)adr));
+ adr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+ return mem;
+}
+
+static void rvfree (void *mem, unsigned long size)
+{
+ unsigned long adr;
+
+ if (!mem)
+ return;
+
+ adr = (unsigned long) mem;
+ while ((long) size > 0) {
+ ClearPageReserved(vmalloc_to_page((void *)adr));
+ adr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+ vfree (mem);
+}
+
+
+/*********************************************************************
+ * pencam read/write functions
+ ********************************************************************/
+
+static int stv_sndctrl (int set, struct usb_stv *stv680, unsigned short req, unsigned short value, unsigned char *buffer, int size)
+{
+ int ret = -1;
+
+ switch (set) {
+ case 0: /* 0xc1 */
+ ret = usb_control_msg (stv680->udev,
+ usb_rcvctrlpipe (stv680->udev, 0),
+ req,
+ (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
+ value, 0, buffer, size, PENCAM_TIMEOUT);
+ break;
+
+ case 1: /* 0x41 */
+ ret = usb_control_msg (stv680->udev,
+ usb_sndctrlpipe (stv680->udev, 0),
+ req,
+ (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
+ value, 0, buffer, size, PENCAM_TIMEOUT);
+ break;
+
+ case 2: /* 0x80 */
+ ret = usb_control_msg (stv680->udev,
+ usb_rcvctrlpipe (stv680->udev, 0),
+ req,
+ (USB_DIR_IN | USB_RECIP_DEVICE),
+ value, 0, buffer, size, PENCAM_TIMEOUT);
+ break;
+
+ case 3: /* 0x40 */
+ ret = usb_control_msg (stv680->udev,
+ usb_sndctrlpipe (stv680->udev, 0),
+ req,
+ (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE),
+ value, 0, buffer, size, PENCAM_TIMEOUT);
+ break;
+
+ }
+ if ((ret < 0) && (req != 0x0a)) {
+ PDEBUG (1, "STV(e): usb_control_msg error %i, request = 0x%x, error = %i", set, req, ret);
+ }
+ return ret;
+}
+
+static int stv_set_config (struct usb_stv *dev, int configuration, int interface, int alternate)
+{
+
+ if (configuration != dev->udev->actconfig->desc.bConfigurationValue
+ || usb_reset_configuration (dev->udev) < 0) {
+ PDEBUG (1, "STV(e): FAILED to reset configuration %i", configuration);
+ return -1;
+ }
+ if (usb_set_interface (dev->udev, interface, alternate) < 0) {
+ PDEBUG (1, "STV(e): FAILED to set alternate interface %i", alternate);
+ return -1;
+ }
+ return 0;
+}
+
+static int stv_stop_video (struct usb_stv *dev)
+{
+ int i;
+ unsigned char *buf;
+
+ buf = kmalloc (40, GFP_KERNEL);
+ if (buf == NULL) {
+ PDEBUG (0, "STV(e): Out of (small buf) memory");
+ return -1;
+ }
+
+ /* this is a high priority command; it stops all lower order commands */
+ if ((i = stv_sndctrl (1, dev, 0x04, 0x0000, buf, 0x0)) < 0) {
+ i = stv_sndctrl (0, dev, 0x80, 0, buf, 0x02); /* Get Last Error; 2 = busy */
+ PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buf[0], buf[1]);
+ } else {
+ PDEBUG (1, "STV(i): Camera reset to idle mode.");
+ }
+
+ if ((i = stv_set_config (dev, 1, 0, 0)) < 0)
+ PDEBUG (1, "STV(e): Reset config during exit failed");
+
+ /* get current mode */
+ buf[0] = 0xf0;
+ if ((i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08)) != 0x08) /* get mode */
+ PDEBUG (0, "STV(e): Stop_video: problem setting original mode");
+ if (dev->origMode != buf[0]) {
+ memset (buf, 0, 8);
+ buf[0] = (unsigned char) dev->origMode;
+ if ((i = stv_sndctrl (3, dev, 0x07, 0x0100, buf, 0x08)) != 0x08) {
+ PDEBUG (0, "STV(e): Stop_video: Set_Camera_Mode failed");
+ i = -1;
+ }
+ buf[0] = 0xf0;
+ i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08);
+ if ((i != 0x08) || (buf[0] != dev->origMode)) {
+ PDEBUG (0, "STV(e): camera NOT set to original resolution.");
+ i = -1;
+ } else
+ PDEBUG (0, "STV(i): Camera set to original resolution");
+ }
+ /* origMode */
+ kfree (buf);
+ return i;
+}
+
+static int stv_set_video_mode (struct usb_stv *dev)
+{
+ int i, stop_video = 1;
+ unsigned char *buf;
+
+ buf = kmalloc (40, GFP_KERNEL);
+ if (buf == NULL) {
+ PDEBUG (0, "STV(e): Out of (small buf) memory");
+ return -1;
+ }
+
+ if ((i = stv_set_config (dev, 1, 0, 0)) < 0) {
+ kfree (buf);
+ return i;
+ }
+
+ i = stv_sndctrl (2, dev, 0x06, 0x0100, buf, 0x12);
+ if (!(i > 0) && (buf[8] == 0x53) && (buf[9] == 0x05)) {
+ PDEBUG (1, "STV(e): Could not get descriptor 0100.");
+ goto error;
+ }
+
+ /* set alternate interface 1 */
+ if ((i = stv_set_config (dev, 1, 0, 1)) < 0)
+ goto error;
+
+ if ((i = stv_sndctrl (0, dev, 0x85, 0, buf, 0x10)) != 0x10)
+ goto error;
+ PDEBUG (1, "STV(i): Setting video mode.");
+ /* Switch to Video mode: 0x0100 = VGA (640x480), 0x0000 = CIF (352x288) 0x0300 = QVGA (320x240) */
+ if ((i = stv_sndctrl (1, dev, 0x09, dev->VideoMode, buf, 0x0)) < 0) {
+ stop_video = 0;
+ goto error;
+ }
+ goto exit;
+
+error:
+ kfree (buf);
+ if (stop_video == 1)
+ stv_stop_video (dev);
+ return -1;
+
+exit:
+ kfree (buf);
+ return 0;
+}
+
+static int stv_init (struct usb_stv *stv680)
+{
+ int i = 0;
+ unsigned char *buffer;
+ unsigned long int bufsize;
+
+ buffer = kmalloc (40, GFP_KERNEL);
+ if (buffer == NULL) {
+ PDEBUG (0, "STV(e): Out of (small buf) memory");
+ return -1;
+ }
+ memset (buffer, 0, 40);
+ udelay (100);
+
+ /* set config 1, interface 0, alternate 0 */
+ if ((i = stv_set_config (stv680, 1, 0, 0)) < 0) {
+ kfree (buffer);
+ PDEBUG (0, "STV(e): set config 1,0,0 failed");
+ return -1;
+ }
+ /* ping camera to be sure STV0680 is present */
+ if ((i = stv_sndctrl (0, stv680, 0x88, 0x5678, buffer, 0x02)) != 0x02)
+ goto error;
+ if ((buffer[0] != 0x56) || (buffer[1] != 0x78)) {
+ PDEBUG (1, "STV(e): camera ping failed!!");
+ goto error;
+ }
+
+ /* get camera descriptor */
+ if ((i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x09)) != 0x09)
+ goto error;
+ i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x22);
+ if (!(i >= 0) && (buffer[7] == 0xa0) && (buffer[8] == 0x23)) {
+ PDEBUG (1, "STV(e): Could not get descriptor 0200.");
+ goto error;
+ }
+ if ((i = stv_sndctrl (0, stv680, 0x8a, 0, buffer, 0x02)) != 0x02)
+ goto error;
+ if ((i = stv_sndctrl (0, stv680, 0x8b, 0, buffer, 0x24)) != 0x24)
+ goto error;
+ if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
+ goto error;
+
+ stv680->SupportedModes = buffer[7];
+ i = stv680->SupportedModes;
+ stv680->CIF = 0;
+ stv680->VGA = 0;
+ stv680->QVGA = 0;
+ if (i & 1)
+ stv680->CIF = 1;
+ if (i & 2)
+ stv680->VGA = 1;
+ if (i & 8)
+ stv680->QVGA = 1;
+ if (stv680->SupportedModes == 0) {
+ PDEBUG (0, "STV(e): There are NO supported STV680 modes!!");
+ i = -1;
+ goto error;
+ } else {
+ if (stv680->CIF)
+ PDEBUG (0, "STV(i): CIF is supported");
+ if (stv680->QVGA)
+ PDEBUG (0, "STV(i): QVGA is supported");
+ }
+ /* FW rev, ASIC rev, sensor ID */
+ PDEBUG (1, "STV(i): Firmware rev is %i.%i", buffer[0], buffer[1]);
+ PDEBUG (1, "STV(i): ASIC rev is %i.%i", buffer[2], buffer[3]);
+ PDEBUG (1, "STV(i): Sensor ID is %i", (buffer[4]*16) + (buffer[5]>>4));
+
+ /* set alternate interface 1 */
+ if ((i = stv_set_config (stv680, 1, 0, 1)) < 0)
+ goto error;
+
+ if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
+ goto error;
+ if ((i = stv_sndctrl (0, stv680, 0x8d, 0, buffer, 0x08)) != 0x08)
+ goto error;
+ i = buffer[3];
+ PDEBUG (0, "STV(i): Camera has %i pictures.", i);
+
+ /* get current mode */
+ if ((i = stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08)) != 0x08)
+ goto error;
+ stv680->origMode = buffer[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
+
+ /* This will attemp CIF mode, if supported. If not, set to QVGA */
+ memset (buffer, 0, 8);
+ if (stv680->CIF)
+ buffer[0] = 0x00;
+ else if (stv680->QVGA)
+ buffer[0] = 0x03;
+ if ((i = stv_sndctrl (3, stv680, 0x07, 0x0100, buffer, 0x08)) != 0x08) {
+ PDEBUG (0, "STV(i): Set_Camera_Mode failed");
+ i = -1;
+ goto error;
+ }
+ buffer[0] = 0xf0;
+ stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08);
+ if (((stv680->CIF == 1) && (buffer[0] != 0x00)) || ((stv680->QVGA == 1) && (buffer[0] != 0x03))) {
+ PDEBUG (0, "STV(e): Error setting camera video mode!");
+ i = -1;
+ goto error;
+ } else {
+ if (buffer[0] == 0) {
+ stv680->VideoMode = 0x0000;
+ PDEBUG (0, "STV(i): Video Mode set to CIF");
+ }
+ if (buffer[0] == 0x03) {
+ stv680->VideoMode = 0x0300;
+ PDEBUG (0, "STV(i): Video Mode set to QVGA");
+ }
+ }
+ if ((i = stv_sndctrl (0, stv680, 0x8f, 0, buffer, 0x10)) != 0x10)
+ goto error;
+ bufsize = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | (buffer[3]);
+ stv680->cwidth = (buffer[4] << 8) | (buffer[5]); /* ->camera = 322, 356, 644 */
+ stv680->cheight = (buffer[6] << 8) | (buffer[7]); /* ->camera = 242, 292, 484 */
+ stv680->origGain = buffer[12];
+
+ goto exit;
+
+error:
+ i = stv_sndctrl (0, stv680, 0x80, 0, buffer, 0x02); /* Get Last Error */
+ PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buffer[0], buffer[1]);
+ kfree (buffer);
+ return -1;
+
+exit:
+ kfree (buffer);
+
+ /* video = 320x240, 352x288 */
+ if (stv680->CIF == 1) {
+ stv680->maxwidth = 352;
+ stv680->maxheight = 288;
+ stv680->vwidth = 352;
+ stv680->vheight = 288;
+ }
+ if (stv680->QVGA == 1) {
+ stv680->maxwidth = 320;
+ stv680->maxheight = 240;
+ stv680->vwidth = 320;
+ stv680->vheight = 240;
+ }
+
+ stv680->rawbufsize = bufsize; /* must be ./. by 8 */
+ stv680->maxframesize = bufsize * 3; /* RGB size */
+ PDEBUG (2, "STV(i): cwidth = %i, cheight = %i", stv680->cwidth, stv680->cheight);
+ PDEBUG (1, "STV(i): width = %i, height = %i, rawbufsize = %li", stv680->vwidth, stv680->vheight, stv680->rawbufsize);
+
+ /* some default values */
+ stv680->bulk_in_endpointAddr = 0x82;
+ stv680->dropped = 0;
+ stv680->error = 0;
+ stv680->framecount = 0;
+ stv680->readcount = 0;
+ stv680->streaming = 0;
+ /* bright, white, colour, hue, contrast are set by software, not in stv0680 */
+ stv680->brightness = 32767;
+ stv680->chgbright = 0;
+ stv680->whiteness = 0; /* only for greyscale */
+ stv680->colour = 32767;
+ stv680->contrast = 32767;
+ stv680->hue = 32767;
+ stv680->palette = STV_VIDEO_PALETTE;
+ stv680->depth = 24; /* rgb24 bits */
+ if ((swapRGB_on == 0) && (swapRGB == 0))
+ PDEBUG (1, "STV(i): swapRGB is (auto) OFF");
+ else if ((swapRGB_on == 0) && (swapRGB == 1))
+ PDEBUG (1, "STV(i): swapRGB is (auto) ON");
+ else if (swapRGB_on == 1)
+ PDEBUG (1, "STV(i): swapRGB is (forced) ON");
+ else if (swapRGB_on == -1)
+ PDEBUG (1, "STV(i): swapRGB is (forced) OFF");
+
+ if (stv_set_video_mode (stv680) < 0) {
+ PDEBUG (0, "STV(e): Could not set video mode in stv_init");
+ return -1;
+ }
+
+ return 0;
+}
+
+/***************** last of pencam routines *******************/
+
+/****************************************************************************
+ * sysfs
+ ***************************************************************************/
+#define stv680_file(name, variable, field) \
+static ssize_t show_##name(struct class_device *class_dev, char *buf) \
+{ \
+ struct video_device *vdev = to_video_device(class_dev); \
+ struct usb_stv *stv = video_get_drvdata(vdev); \
+ return sprintf(buf, field, stv->variable); \
+} \
+static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
+
+stv680_file(model, camera_name, "%s\n");
+stv680_file(in_use, user, "%d\n");
+stv680_file(streaming, streaming, "%d\n");
+stv680_file(palette, palette, "%i\n");
+stv680_file(frames_total, readcount, "%d\n");
+stv680_file(frames_read, framecount, "%d\n");
+stv680_file(packets_dropped, dropped, "%d\n");
+stv680_file(decoding_errors, error, "%d\n");
+
+static void stv680_create_sysfs_files(struct video_device *vdev)
+{
+ video_device_create_file(vdev, &class_device_attr_model);
+ video_device_create_file(vdev, &class_device_attr_in_use);
+ video_device_create_file(vdev, &class_device_attr_streaming);
+ video_device_create_file(vdev, &class_device_attr_palette);
+ video_device_create_file(vdev, &class_device_attr_frames_total);
+ video_device_create_file(vdev, &class_device_attr_frames_read);
+ video_device_create_file(vdev, &class_device_attr_packets_dropped);
+ video_device_create_file(vdev, &class_device_attr_decoding_errors);
+}
+
+static void stv680_remove_sysfs_files(struct video_device *vdev)
+{
+ video_device_remove_file(vdev, &class_device_attr_model);
+ video_device_remove_file(vdev, &class_device_attr_in_use);
+ video_device_remove_file(vdev, &class_device_attr_streaming);
+ video_device_remove_file(vdev, &class_device_attr_palette);
+ video_device_remove_file(vdev, &class_device_attr_frames_total);
+ video_device_remove_file(vdev, &class_device_attr_frames_read);
+ video_device_remove_file(vdev, &class_device_attr_packets_dropped);
+ video_device_remove_file(vdev, &class_device_attr_decoding_errors);
+}
+
+/********************************************************************
+ * Camera control
+ *******************************************************************/
+
+static int stv680_get_pict (struct usb_stv *stv680, struct video_picture *p)
+{
+ /* This sets values for v4l interface. max/min = 65535/0 */
+
+ p->brightness = stv680->brightness;
+ p->whiteness = stv680->whiteness; /* greyscale */
+ p->colour = stv680->colour;
+ p->contrast = stv680->contrast;
+ p->hue = stv680->hue;
+ p->palette = stv680->palette;
+ p->depth = stv680->depth;
+ return 0;
+}
+
+static int stv680_set_pict (struct usb_stv *stv680, struct video_picture *p)
+{
+ /* See above stv680_get_pict */
+
+ if (p->palette != STV_VIDEO_PALETTE) {
+ PDEBUG (2, "STV(e): Palette set error in _set_pic");
+ return 1;
+ }
+
+ if (stv680->brightness != p->brightness) {
+ stv680->chgbright = 1;
+ stv680->brightness = p->brightness;
+ }
+
+ stv680->whiteness = p->whiteness; /* greyscale */
+ stv680->colour = p->colour;
+ stv680->contrast = p->contrast;
+ stv680->hue = p->hue;
+ stv680->palette = p->palette;
+ stv680->depth = p->depth;
+
+ return 0;
+}
+
+static void stv680_video_irq (struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_stv *stv680 = urb->context;
+ int length = urb->actual_length;
+
+ if (length < stv680->rawbufsize)
+ PDEBUG (2, "STV(i): Lost data in transfer: exp %li, got %i", stv680->rawbufsize, length);
+
+ /* ohoh... */
+ if (!stv680->streaming)
+ return;
+
+ if (!stv680->udev) {
+ PDEBUG (0, "STV(e): device vapourished in video_irq");
+ return;
+ }
+
+ /* 0 sized packets happen if we are to fast, but sometimes the camera
+ keeps sending them forever...
+ */
+ if (length && !urb->status) {
+ stv680->nullpackets = 0;
+ switch (stv680->scratch[stv680->scratch_next].state) {
+ case BUFFER_READY:
+ case BUFFER_BUSY:
+ stv680->dropped++;
+ break;
+
+ case BUFFER_UNUSED:
+ memcpy (stv680->scratch[stv680->scratch_next].data,
+ (unsigned char *) urb->transfer_buffer, length);
+ stv680->scratch[stv680->scratch_next].state = BUFFER_READY;
+ stv680->scratch[stv680->scratch_next].length = length;
+ if (waitqueue_active (&stv680->wq)) {
+ wake_up_interruptible (&stv680->wq);
+ }
+ stv680->scratch_overflow = 0;
+ stv680->scratch_next++;
+ if (stv680->scratch_next >= STV680_NUMSCRATCH)
+ stv680->scratch_next = 0;
+ break;
+ } /* switch */
+ } else {
+ stv680->nullpackets++;
+ if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
+ if (waitqueue_active (&stv680->wq)) {
+ wake_up_interruptible (&stv680->wq);
+ }
+ }
+ } /* if - else */
+
+ /* Resubmit urb for new data */
+ urb->status = 0;
+ urb->dev = stv680->udev;
+ if (usb_submit_urb (urb, GFP_ATOMIC))
+ PDEBUG (0, "STV(e): urb burned down in video irq");
+ return;
+} /* _video_irq */
+
+static int stv680_start_stream (struct usb_stv *stv680)
+{
+ struct urb *urb;
+ int err = 0, i;
+
+ stv680->streaming = 1;
+
+ /* Do some memory allocation */
+ for (i = 0; i < STV680_NUMFRAMES; i++) {
+ stv680->frame[i].data = stv680->fbuf + i * stv680->maxframesize;
+ stv680->frame[i].curpix = 0;
+ }
+ /* packet size = 4096 */
+ for (i = 0; i < STV680_NUMSBUF; i++) {
+ stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
+ if (stv680->sbuf[i].data == NULL) {
+ PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i);
+ return -1;
+ }
+ }
+
+ stv680->scratch_next = 0;
+ stv680->scratch_use = 0;
+ stv680->scratch_overflow = 0;
+ for (i = 0; i < STV680_NUMSCRATCH; i++) {
+ stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
+ if (stv680->scratch[i].data == NULL) {
+ PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i);
+ return -1;
+ }
+ stv680->scratch[i].state = BUFFER_UNUSED;
+ }
+
+ for (i = 0; i < STV680_NUMSBUF; i++) {
+ urb = usb_alloc_urb (0, GFP_KERNEL);
+ if (!urb)
+ return -ENOMEM;
+
+ /* sbuf is urb->transfer_buffer, later gets memcpyed to scratch */
+ usb_fill_bulk_urb (urb, stv680->udev,
+ usb_rcvbulkpipe (stv680->udev, stv680->bulk_in_endpointAddr),
+ stv680->sbuf[i].data, stv680->rawbufsize,
+ stv680_video_irq, stv680);
+ stv680->urb[i] = urb;
+ err = usb_submit_urb (stv680->urb[i], GFP_KERNEL);
+ if (err)
+ PDEBUG (0, "STV(e): urb burned down in start stream");
+ } /* i STV680_NUMSBUF */
+
+ stv680->framecount = 0;
+ return 0;
+}
+
+static int stv680_stop_stream (struct usb_stv *stv680)
+{
+ int i;
+
+ if (!stv680->streaming || !stv680->udev)
+ return 1;
+
+ stv680->streaming = 0;
+
+ for (i = 0; i < STV680_NUMSBUF; i++)
+ if (stv680->urb[i]) {
+ usb_kill_urb (stv680->urb[i]);
+ usb_free_urb (stv680->urb[i]);
+ stv680->urb[i] = NULL;
+ kfree (stv680->sbuf[i].data);
+ }
+ for (i = 0; i < STV680_NUMSCRATCH; i++) {
+ kfree (stv680->scratch[i].data);
+ stv680->scratch[i].data = NULL;
+ }
+
+ return 0;
+}
+
+static int stv680_set_size (struct usb_stv *stv680, int width, int height)
+{
+ int wasstreaming = stv680->streaming;
+
+ /* Check to see if we need to change */
+ if ((stv680->vwidth == width) && (stv680->vheight == height))
+ return 0;
+
+ PDEBUG (1, "STV(i): size request for %i x %i", width, height);
+ /* Check for a valid mode */
+ if ((!width || !height) || ((width & 1) || (height & 1))) {
+ PDEBUG (1, "STV(e): set_size error: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight);
+ return 1;
+ }
+
+ if ((width < (stv680->maxwidth / 2)) || (height < (stv680->maxheight / 2))) {
+ width = stv680->maxwidth / 2;
+ height = stv680->maxheight / 2;
+ } else if ((width >= 158) && (width <= 166) && (stv680->QVGA == 1)) {
+ width = 160;
+ height = 120;
+ } else if ((width >= 172) && (width <= 180) && (stv680->CIF == 1)) {
+ width = 176;
+ height = 144;
+ } else if ((width >= 318) && (width <= 350) && (stv680->QVGA == 1)) {
+ width = 320;
+ height = 240;
+ } else if ((width >= 350) && (width <= 358) && (stv680->CIF == 1)) {
+ width = 352;
+ height = 288;
+ } else {
+ PDEBUG (1, "STV(e): request for non-supported size: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight);
+ return 1;
+ }
+
+ /* Stop a current stream and start it again at the new size */
+ if (wasstreaming)
+ stv680_stop_stream (stv680);
+ stv680->vwidth = width;
+ stv680->vheight = height;
+ PDEBUG (1, "STV(i): size set to %i x %i", stv680->vwidth, stv680->vheight);
+ if (wasstreaming)
+ stv680_start_stream (stv680);
+
+ return 0;
+}
+
+/**********************************************************************
+ * Video Decoding
+ **********************************************************************/
+
+/******* routines from the pencam program; hey, they work! ********/
+
+/*
+ * STV0680 Vision Camera Chipset Driver
+ * Copyright (C) 2000 Adam Harrison <adam@antispin.org>
+*/
+
+#define RED 0
+#define GREEN 1
+#define BLUE 2
+#define AD(x, y, w) (((y)*(w)+(x))*3)
+
+static void bayer_unshuffle (struct usb_stv *stv680, struct stv680_scratch *buffer)
+{
+ int x, y, i;
+ int w = stv680->cwidth;
+ int vw = stv680->cwidth, vh = stv680->cheight;
+ unsigned int p = 0;
+ int colour = 0, bayer = 0;
+ unsigned char *raw = buffer->data;
+ struct stv680_frame *frame = &stv680->frame[stv680->curframe];
+ unsigned char *output = frame->data;
+ unsigned char *temp = frame->data;
+ int offset = buffer->offset;
+
+ if (frame->curpix == 0) {
+ if (frame->grabstate == FRAME_READY) {
+ frame->grabstate = FRAME_GRABBING;
+ }
+ }
+ if (offset != frame->curpix) { /* Regard frame as lost :( */
+ frame->curpix = 0;
+ stv680->error++;
+ return;
+ }
+
+ if ((stv680->vwidth == 320) || (stv680->vwidth == 160)) {
+ vw = 320;
+ vh = 240;
+ }
+ if ((stv680->vwidth == 352) || (stv680->vwidth == 176)) {
+ vw = 352;
+ vh = 288;
+ }
+
+ memset (output, 0, 3 * vw * vh); /* clear output matrix. */
+
+ for (y = 0; y < vh; y++) {
+ for (x = 0; x < vw; x++) {
+ if (x & 1)
+ p = *(raw + y * w + (x >> 1));
+ else
+ p = *(raw + y * w + (x >> 1) + (w >> 1));
+
+ if (y & 1)
+ bayer = 2;
+ else
+ bayer = 0;
+ if (x & 1)
+ bayer++;
+
+ switch (bayer) {
+ case 0:
+ case 3:
+ colour = 1;
+ break;
+ case 1:
+ colour = 0;
+ break;
+ case 2:
+ colour = 2;
+ break;
+ }
+ i = (y * vw + x) * 3;
+ *(output + i + colour) = (unsigned char) p;
+ } /* for x */
+
+ } /* for y */
+
+ /****** gamma correction plus hardcoded white balance */
+ /* Thanks to Alexander Schwartx <alexander.schwartx@gmx.net> for this code.
+ Correction values red[], green[], blue[], are generated by
+ (pow(i/256.0, GAMMA)*255.0)*white balanceRGB where GAMMA=0.55, 1<i<255.
+ White balance (RGB)= 1.0, 1.17, 1.48. Values are calculated as double float and
+ converted to unsigned char. Values are in stv680.h */
+
+ for (y = 0; y < vh; y++) {
+ for (x = 0; x < vw; x++) {
+ i = (y * vw + x) * 3;
+ *(output + i) = red[*(output + i)];
+ *(output + i + 1) = green[*(output + i + 1)];
+ *(output + i + 2) = blue[*(output + i + 2)];
+ }
+ }
+
+ /****** bayer demosaic ******/
+ for (y = 1; y < (vh - 1); y++) {
+ for (x = 1; x < (vw - 1); x++) { /* work out pixel type */
+ if (y & 1)
+ bayer = 0;
+ else
+ bayer = 2;
+ if (!(x & 1))
+ bayer++;
+
+ switch (bayer) {
+ case 0: /* green. blue lr, red tb */
+ *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y, vw) + BLUE) + (int) *(output + AD (x + 1, y, vw) + BLUE)) >> 1;
+ *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x, y - 1, vw) + RED) + (int) *(output + AD (x, y + 1, vw) + RED)) >> 1;
+ break;
+
+ case 1: /* blue. green lrtb, red diagonals */
+ *(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2;
+ *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y - 1, vw) + RED) + (int) *(output + AD (x - 1, y + 1, vw) + RED) + (int) *(output + AD (x + 1, y - 1, vw) + RED) + (int) *(output + AD (x + 1, y + 1, vw) + RED)) >> 2;
+ break;
+
+ case 2: /* red. green lrtb, blue diagonals */
+ *(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2;
+ *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y - 1, vw) + BLUE) + (int) *(output + AD (x + 1, y - 1, vw) + BLUE) + (int) *(output + AD (x - 1, y + 1, vw) + BLUE) + (int) *(output + AD (x + 1, y + 1, vw) + BLUE)) >> 2;
+ break;
+
+ case 3: /* green. red lr, blue tb */
+ *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y, vw) + RED) + (int) *(output + AD (x + 1, y, vw) + RED)) >> 1;
+ *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x, y - 1, vw) + BLUE) + (int) *(output + AD (x, y + 1, vw) + BLUE)) >> 1;
+ break;
+ } /* switch */
+ } /* for x */
+ } /* for y - end demosaic */
+
+ /* fix top and bottom row, left and right side */
+ i = vw * 3;
+ memcpy (output, (output + i), i);
+ memcpy ((output + (vh * i)), (output + ((vh - 1) * i)), i);
+ for (y = 0; y < vh; y++) {
+ i = y * vw * 3;
+ memcpy ((output + i), (output + i + 3), 3);
+ memcpy ((output + i + (vw * 3)), (output + i + (vw - 1) * 3), 3);
+ }
+
+ /* process all raw data, then trim to size if necessary */
+ if ((stv680->vwidth == 160) || (stv680->vwidth == 176)) {
+ i = 0;
+ for (y = 0; y < vh; y++) {
+ if (!(y & 1)) {
+ for (x = 0; x < vw; x++) {
+ p = (y * vw + x) * 3;
+ if (!(x & 1)) {
+ *(output + i) = *(output + p);
+ *(output + i + 1) = *(output + p + 1);
+ *(output + i + 2) = *(output + p + 2);
+ i += 3;
+ }
+ } /* for x */
+ }
+ } /* for y */
+ }
+ /* reset to proper width */
+ if ((stv680->vwidth == 160)) {
+ vw = 160;
+ vh = 120;
+ }
+ if ((stv680->vwidth == 176)) {
+ vw = 176;
+ vh = 144;
+ }
+
+ /* output is RGB; some programs want BGR */
+ /* swapRGB_on=0 -> program decides; swapRGB_on=1, always swap */
+ /* swapRGB_on=-1, never swap */
+ if (((swapRGB == 1) && (swapRGB_on != -1)) || (swapRGB_on == 1)) {
+ for (y = 0; y < vh; y++) {
+ for (x = 0; x < vw; x++) {
+ i = (y * vw + x) * 3;
+ *(temp) = *(output + i);
+ *(output + i) = *(output + i + 2);
+ *(output + i + 2) = *(temp);
+ }
+ }
+ }
+ /* brightness */
+ if (stv680->chgbright == 1) {
+ if (stv680->brightness >= 32767) {
+ p = (stv680->brightness - 32767) / 256;
+ for (x = 0; x < (vw * vh * 3); x++) {
+ if ((*(output + x) + (unsigned char) p) > 255)
+ *(output + x) = 255;
+ else
+ *(output + x) += (unsigned char) p;
+ } /* for */
+ } else {
+ p = (32767 - stv680->brightness) / 256;
+ for (x = 0; x < (vw * vh * 3); x++) {
+ if ((unsigned char) p > *(output + x))
+ *(output + x) = 0;
+ else
+ *(output + x) -= (unsigned char) p;
+ } /* for */
+ } /* else */
+ }
+ /* if */
+ frame->curpix = 0;
+ frame->curlinepix = 0;
+ frame->grabstate = FRAME_DONE;
+ stv680->framecount++;
+ stv680->readcount++;
+ if (stv680->frame[(stv680->curframe + 1) & (STV680_NUMFRAMES - 1)].grabstate == FRAME_READY) {
+ stv680->curframe = (stv680->curframe + 1) & (STV680_NUMFRAMES - 1);
+ }
+
+} /* bayer_unshuffle */
+
+/******* end routines from the pencam program *********/
+
+static int stv680_newframe (struct usb_stv *stv680, int framenr)
+{
+ int errors = 0;
+
+ while (stv680->streaming && (stv680->frame[framenr].grabstate == FRAME_READY || stv680->frame[framenr].grabstate == FRAME_GRABBING)) {
+ if (!stv680->frame[framenr].curpix) {
+ errors++;
+ }
+ wait_event_interruptible (stv680->wq, (stv680->scratch[stv680->scratch_use].state == BUFFER_READY));
+
+ if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
+ stv680->nullpackets = 0;
+ PDEBUG (2, "STV(i): too many null length packets, restarting capture");
+ stv680_stop_stream (stv680);
+ stv680_start_stream (stv680);
+ } else {
+ if (stv680->scratch[stv680->scratch_use].state != BUFFER_READY) {
+ stv680->frame[framenr].grabstate = FRAME_ERROR;
+ PDEBUG (2, "STV(e): FRAME_ERROR in _newframe");
+ return -EIO;
+ }
+ stv680->scratch[stv680->scratch_use].state = BUFFER_BUSY;
+
+ bayer_unshuffle (stv680, &stv680->scratch[stv680->scratch_use]);
+
+ stv680->scratch[stv680->scratch_use].state = BUFFER_UNUSED;
+ stv680->scratch_use++;
+ if (stv680->scratch_use >= STV680_NUMSCRATCH)
+ stv680->scratch_use = 0;
+ if (errors > STV680_MAX_ERRORS) {
+ errors = 0;
+ PDEBUG (2, "STV(i): too many errors, restarting capture");
+ stv680_stop_stream (stv680);
+ stv680_start_stream (stv680);
+ }
+ } /* else */
+ } /* while */
+ return 0;
+}
+
+/*********************************************************************
+ * Video4Linux
+ *********************************************************************/
+
+static int stv_open (struct inode *inode, struct file *file)
+{
+ struct video_device *dev = video_devdata(file);
+ struct usb_stv *stv680 = video_get_drvdata(dev);
+ int err = 0;
+
+ /* we are called with the BKL held */
+ stv680->user = 1;
+ err = stv_init (stv680); /* main initialization routine for camera */
+
+ if (err >= 0) {
+ stv680->fbuf = rvmalloc (stv680->maxframesize * STV680_NUMFRAMES);
+ if (!stv680->fbuf) {
+ PDEBUG (0, "STV(e): Could not rvmalloc frame bufer");
+ err = -ENOMEM;
+ }
+ file->private_data = dev;
+ }
+ if (err)
+ stv680->user = 0;
+
+ return err;
+}
+
+static int stv_close (struct inode *inode, struct file *file)
+{
+ struct video_device *dev = file->private_data;
+ struct usb_stv *stv680 = video_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < STV680_NUMFRAMES; i++)
+ stv680->frame[i].grabstate = FRAME_UNUSED;
+ if (stv680->streaming)
+ stv680_stop_stream (stv680);
+
+ if ((i = stv_stop_video (stv680)) < 0)
+ PDEBUG (1, "STV(e): stop_video failed in stv_close");
+
+ rvfree (stv680->fbuf, stv680->maxframesize * STV680_NUMFRAMES);
+ stv680->user = 0;
+
+ if (stv680->removed) {
+ kfree (stv680);
+ stv680 = NULL;
+ PDEBUG (0, "STV(i): device unregistered");
+ }
+ file->private_data = NULL;
+ return 0;
+}
+
+static int stv680_do_ioctl (struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg)
+{
+ struct video_device *vdev = file->private_data;
+ struct usb_stv *stv680 = video_get_drvdata(vdev);
+
+ if (!stv680->udev)
+ return -EIO;
+
+ switch (cmd) {
+ case VIDIOCGCAP:{
+ struct video_capability *b = arg;
+
+ strcpy (b->name, stv680->camera_name);
+ b->type = VID_TYPE_CAPTURE;
+ b->channels = 1;
+ b->audios = 0;
+ b->maxwidth = stv680->maxwidth;
+ b->maxheight = stv680->maxheight;
+ b->minwidth = stv680->maxwidth / 2;
+ b->minheight = stv680->maxheight / 2;
+ return 0;
+ }
+ case VIDIOCGCHAN:{
+ struct video_channel *v = arg;
+
+ if (v->channel != 0)
+ return -EINVAL;
+ v->flags = 0;
+ v->tuners = 0;
+ v->type = VIDEO_TYPE_CAMERA;
+ strcpy (v->name, "STV Camera");
+ return 0;
+ }
+ case VIDIOCSCHAN:{
+ struct video_channel *v = arg;
+ if (v->channel != 0)
+ return -EINVAL;
+ return 0;
+ }
+ case VIDIOCGPICT:{
+ struct video_picture *p = arg;
+
+ stv680_get_pict (stv680, p);
+ return 0;
+ }
+ case VIDIOCSPICT:{
+ struct video_picture *p = arg;
+
+ if (stv680_set_pict (stv680, p))
+ return -EINVAL;
+ return 0;
+ }
+ case VIDIOCSWIN:{
+ struct video_window *vw = arg;
+
+ if (vw->flags)
+ return -EINVAL;
+ if (vw->clipcount)
+ return -EINVAL;
+ if (vw->width != stv680->vwidth) {
+ if (stv680_set_size (stv680, vw->width, vw->height)) {
+ PDEBUG (2, "STV(e): failed (from user) set size in VIDIOCSWIN");
+ return -EINVAL;
+ }
+ }
+ return 0;
+ }
+ case VIDIOCGWIN:{
+ struct video_window *vw = arg;
+
+ vw->x = 0; /* FIXME */
+ vw->y = 0;
+ vw->chromakey = 0;
+ vw->flags = 0;
+ vw->clipcount = 0;
+ vw->width = stv680->vwidth;
+ vw->height = stv680->vheight;
+ return 0;
+ }
+ case VIDIOCGMBUF:{
+ struct video_mbuf *vm = arg;
+ int i;
+
+ memset (vm, 0, sizeof (*vm));
+ vm->size = STV680_NUMFRAMES * stv680->maxframesize;
+ vm->frames = STV680_NUMFRAMES;
+ for (i = 0; i < STV680_NUMFRAMES; i++)
+ vm->offsets[i] = stv680->maxframesize * i;
+ return 0;
+ }
+ case VIDIOCMCAPTURE:{
+ struct video_mmap *vm = arg;
+
+ if (vm->format != STV_VIDEO_PALETTE) {
+ PDEBUG (2, "STV(i): VIDIOCMCAPTURE vm.format (%i) != VIDEO_PALETTE (%i)",
+ vm->format, STV_VIDEO_PALETTE);
+ if ((vm->format == 3) && (swapRGB_on == 0)) {
+ PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is (auto) ON");
+ /* this may fix those apps (e.g., xawtv) that want BGR */
+ swapRGB = 1;
+ }
+ return -EINVAL;
+ }
+ if (vm->frame >= STV680_NUMFRAMES) {
+ PDEBUG (2, "STV(e): VIDIOCMCAPTURE vm.frame > NUMFRAMES");
+ return -EINVAL;
+ }
+ if ((stv680->frame[vm->frame].grabstate == FRAME_ERROR)
+ || (stv680->frame[vm->frame].grabstate == FRAME_GRABBING)) {
+ PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate (%i) error",
+ stv680->frame[vm->frame].grabstate);
+ return -EBUSY;
+ }
+ /* Is this according to the v4l spec??? */
+ if (stv680->vwidth != vm->width) {
+ if (stv680_set_size (stv680, vm->width, vm->height)) {
+ PDEBUG (2, "STV(e): VIDIOCMCAPTURE set_size failed");
+ return -EINVAL;
+ }
+ }
+ stv680->frame[vm->frame].grabstate = FRAME_READY;
+
+ if (!stv680->streaming)
+ stv680_start_stream (stv680);
+
+ return 0;
+ }
+ case VIDIOCSYNC:{
+ int *frame = arg;
+ int ret = 0;
+
+ if (*frame < 0 || *frame >= STV680_NUMFRAMES) {
+ PDEBUG (2, "STV(e): Bad frame # in VIDIOCSYNC");
+ return -EINVAL;
+ }
+ ret = stv680_newframe (stv680, *frame);
+ stv680->frame[*frame].grabstate = FRAME_UNUSED;
+ return ret;
+ }
+ case VIDIOCGFBUF:{
+ struct video_buffer *vb = arg;
+
+ memset (vb, 0, sizeof (*vb));
+ return 0;
+ }
+ case VIDIOCKEY:
+ return 0;
+ case VIDIOCCAPTURE:
+ {
+ PDEBUG (2, "STV(e): VIDIOCCAPTURE failed");
+ return -EINVAL;
+ }
+ case VIDIOCSFBUF:
+ case VIDIOCGTUNER:
+ case VIDIOCSTUNER:
+ case VIDIOCGFREQ:
+ case VIDIOCSFREQ:
+ case VIDIOCGAUDIO:
+ case VIDIOCSAUDIO:
+ return -EINVAL;
+ default:
+ return -ENOIOCTLCMD;
+ } /* end switch */
+
+ return 0;
+}
+
+static int stv680_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ return video_usercopy(inode, file, cmd, arg, stv680_do_ioctl);
+}
+
+static int stv680_mmap (struct file *file, struct vm_area_struct *vma)
+{
+ struct video_device *dev = file->private_data;
+ struct usb_stv *stv680 = video_get_drvdata(dev);
+ unsigned long start = vma->vm_start;
+ unsigned long size = vma->vm_end-vma->vm_start;
+ unsigned long page, pos;
+
+ down (&stv680->lock);
+
+ if (stv680->udev == NULL) {
+ up (&stv680->lock);
+ return -EIO;
+ }
+ if (size > (((STV680_NUMFRAMES * stv680->maxframesize) + PAGE_SIZE - 1)
+ & ~(PAGE_SIZE - 1))) {
+ up (&stv680->lock);
+ return -EINVAL;
+ }
+ pos = (unsigned long) stv680->fbuf;
+ while (size > 0) {
+ page = vmalloc_to_pfn((void *)pos);
+ if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
+ up (&stv680->lock);
+ return -EAGAIN;
+ }
+ start += PAGE_SIZE;
+ pos += PAGE_SIZE;
+ if (size > PAGE_SIZE)
+ size -= PAGE_SIZE;
+ else
+ size = 0;
+ }
+ up (&stv680->lock);
+
+ return 0;
+}
+
+static ssize_t stv680_read (struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct video_device *dev = file->private_data;
+ unsigned long int realcount = count;
+ int ret = 0;
+ struct usb_stv *stv680 = video_get_drvdata(dev);
+ unsigned long int i;
+
+ if (STV680_NUMFRAMES != 2) {
+ PDEBUG (0, "STV(e): STV680_NUMFRAMES needs to be 2!");
+ return -1;
+ }
+ if (stv680->udev == NULL)
+ return -EIO;
+ if (realcount > (stv680->vwidth * stv680->vheight * 3))
+ realcount = stv680->vwidth * stv680->vheight * 3;
+
+ /* Shouldn't happen: */
+ if (stv680->frame[0].grabstate == FRAME_GRABBING) {
+ PDEBUG (2, "STV(e): FRAME_GRABBING in stv680_read");
+ return -EBUSY;
+ }
+ stv680->frame[0].grabstate = FRAME_READY;
+ stv680->frame[1].grabstate = FRAME_UNUSED;
+ stv680->curframe = 0;
+
+ if (!stv680->streaming)
+ stv680_start_stream (stv680);
+
+ if (!stv680->streaming) {
+ ret = stv680_newframe (stv680, 0); /* ret should = 0 */
+ }
+
+ ret = stv680_newframe (stv680, 0);
+
+ if (!ret) {
+ if ((i = copy_to_user (buf, stv680->frame[0].data, realcount)) != 0) {
+ PDEBUG (2, "STV(e): copy_to_user frame 0 failed, ret count = %li", i);
+ return -EFAULT;
+ }
+ } else {
+ realcount = ret;
+ }
+ stv680->frame[0].grabstate = FRAME_UNUSED;
+ return realcount;
+} /* stv680_read */
+
+static struct file_operations stv680_fops = {
+ .owner = THIS_MODULE,
+ .open = stv_open,
+ .release = stv_close,
+ .read = stv680_read,
+ .mmap = stv680_mmap,
+ .ioctl = stv680_ioctl,
+ .llseek = no_llseek,
+};
+static struct video_device stv680_template = {
+ .owner = THIS_MODULE,
+ .name = "STV0680 USB camera",
+ .type = VID_TYPE_CAPTURE,
+ .hardware = VID_HARDWARE_SE401,
+ .fops = &stv680_fops,
+ .release = video_device_release,
+ .minor = -1,
+};
+
+static int stv680_probe (struct usb_interface *intf, const struct usb_device_id *id)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+ struct usb_host_interface *interface;
+ struct usb_stv *stv680 = NULL;
+ char *camera_name = NULL;
+ int retval = 0;
+
+ /* We don't handle multi-config cameras */
+ if (dev->descriptor.bNumConfigurations != 1) {
+ PDEBUG (0, "STV(e): Number of Configurations != 1");
+ return -ENODEV;
+ }
+
+ interface = &intf->altsetting[0];
+ /* Is it a STV680? */
+ if ((le16_to_cpu(dev->descriptor.idVendor) == USB_PENCAM_VENDOR_ID) &&
+ (le16_to_cpu(dev->descriptor.idProduct) == USB_PENCAM_PRODUCT_ID)) {
+ camera_name = "STV0680";
+ PDEBUG (0, "STV(i): STV0680 camera found.");
+ } else {
+ PDEBUG (0, "STV(e): Vendor/Product ID do not match STV0680 values.");
+ PDEBUG (0, "STV(e): Check that the STV0680 camera is connected to the computer.");
+ retval = -ENODEV;
+ goto error;
+ }
+ /* We found one */
+ if ((stv680 = kmalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) {
+ PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct.");
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ memset (stv680, 0, sizeof (*stv680));
+
+ stv680->udev = dev;
+ stv680->camera_name = camera_name;
+
+ stv680->vdev = video_device_alloc();
+ if (!stv680->vdev) {
+ retval = -ENOMEM;
+ goto error;
+ }
+ memcpy(stv680->vdev, &stv680_template, sizeof(stv680_template));
+ stv680->vdev->dev = &intf->dev;
+ video_set_drvdata(stv680->vdev, stv680);
+
+ memcpy (stv680->vdev->name, stv680->camera_name, strlen (stv680->camera_name));
+ init_waitqueue_head (&stv680->wq);
+ init_MUTEX (&stv680->lock);
+ wmb ();
+
+ if (video_register_device (stv680->vdev, VFL_TYPE_GRABBER, video_nr) == -1) {
+ PDEBUG (0, "STV(e): video_register_device failed");
+ retval = -EIO;
+ goto error_vdev;
+ }
+ PDEBUG (0, "STV(i): registered new video device: video%d", stv680->vdev->minor);
+
+ usb_set_intfdata (intf, stv680);
+ stv680_create_sysfs_files(stv680->vdev);
+ return 0;
+
+error_vdev:
+ video_device_release(stv680->vdev);
+error:
+ kfree(stv680);
+ return retval;
+}
+
+static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680)
+{
+ int i;
+
+ stv680->udev = NULL;
+ stv680->frame[0].grabstate = FRAME_ERROR;
+ stv680->frame[1].grabstate = FRAME_ERROR;
+ stv680->streaming = 0;
+
+ wake_up_interruptible (&stv680->wq);
+
+ for (i = 0; i < STV680_NUMSBUF; i++)
+ if (stv680->urb[i]) {
+ usb_kill_urb (stv680->urb[i]);
+ usb_free_urb (stv680->urb[i]);
+ stv680->urb[i] = NULL;
+ kfree (stv680->sbuf[i].data);
+ }
+ for (i = 0; i < STV680_NUMSCRATCH; i++)
+ kfree (stv680->scratch[i].data);
+ PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
+
+ /* Free the memory */
+ kfree (stv680);
+}
+
+static void stv680_disconnect (struct usb_interface *intf)
+{
+ struct usb_stv *stv680 = usb_get_intfdata (intf);
+
+ usb_set_intfdata (intf, NULL);
+
+ if (stv680) {
+ /* We don't want people trying to open up the device */
+ if (stv680->vdev) {
+ stv680_remove_sysfs_files(stv680->vdev);
+ video_unregister_device(stv680->vdev);
+ stv680->vdev = NULL;
+ }
+ if (!stv680->user) {
+ usb_stv680_remove_disconnected (stv680);
+ } else {
+ stv680->removed = 1;
+ }
+ }
+}
+
+static struct usb_driver stv680_driver = {
+ .owner = THIS_MODULE,
+ .name = "stv680",
+ .probe = stv680_probe,
+ .disconnect = stv680_disconnect,
+ .id_table = device_table
+};
+
+/********************************************************************
+ * Module routines
+ ********************************************************************/
+
+static int __init usb_stv680_init (void)
+{
+ if (usb_register (&stv680_driver) < 0) {
+ PDEBUG (0, "STV(e): Could not setup STV0680 driver");
+ return -1;
+ }
+ PDEBUG (0, "STV(i): usb camera driver version %s registering", DRIVER_VERSION);
+
+ info(DRIVER_DESC " " DRIVER_VERSION);
+ return 0;
+}
+
+static void __exit usb_stv680_exit (void)
+{
+ usb_deregister (&stv680_driver);
+ PDEBUG (0, "STV(i): driver deregistered");
+}
+
+module_init (usb_stv680_init);
+module_exit (usb_stv680_exit);