Hi,
Here's a patch against 2.4.17 that adds the stv680 (Pencam) video camera
driver. The driver was written by Kevin Sisson.
thanks,
greg k-h
diff -Nru a/drivers/usb/stv680.c b/drivers/usb/stv680.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/usb/stv680.c Fri Dec 21 12:58:16 2001
@@ -0,0 +1,1633 @@
+/*
+ * STV0680 USB Camera Driver, by Kevin Sisson ([EMAIL PROTECTED])
+ *
+ * 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 ([EMAIL PROTECTED])
+ *
+ * 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,
+ * [EMAIL PROTECTED]) 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
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/pagemap.h>
+#include <linux/wrapper.h>
+#include <linux/smp_lock.h>
+#include <linux/sched.h>
+#include <linux/signal.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;
+
+static unsigned int debug = 0;
+
+#define PDEBUG(level, fmt, args...) \
+ do { \
+ if (debug >= level) \
+ info("[" __PRETTY_FUNCTION__ ":%d] " fmt, __LINE__ , ## args); \
+ } while (0)
+
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v0.23"
+#define DRIVER_AUTHOR "Kevin Sisson <[EMAIL PROTECTED]>"
+#define DRIVER_DESC "STV0680 USB Camera Driver"
+
+MODULE_AUTHOR (DRIVER_AUTHOR);
+MODULE_DESCRIPTION (DRIVER_DESC);
+MODULE_LICENSE ("GPL");
+MODULE_PARM (debug, "i");
+MODULE_PARM_DESC (debug, "Debug enabled or not");
+MODULE_PARM (swapRGB, "i");
+MODULE_PARM_DESC (swapRGB, "Swap red and blue, e.g., for xawtv");
+MODULE_PARM (video_nr, "i");
+EXPORT_NO_SYMBOLS;
+
+/********************************************************************
+ *
+ * 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
+ ********************************************************************/
+
+/* Given PGD from the address space's page table, return the kernel
+ * virtual mapping of the physical memory mapped at ADR.
+ */
+static inline unsigned long uvirt_to_kva (pgd_t * pgd, unsigned long adr)
+{
+ unsigned long ret = 0UL;
+ pmd_t *pmd;
+ pte_t *ptep, pte;
+
+ if (!pgd_none (*pgd)) {
+ pmd = pmd_offset (pgd, adr);
+ if (!pmd_none (*pmd)) {
+ ptep = pte_offset (pmd, adr);
+ pte = *ptep;
+ if (pte_present (pte)) {
+ ret = (unsigned long) page_address (pte_page (pte));
+ ret |= (adr & (PAGE_SIZE - 1));
+ }
+ }
+ }
+ return ret;
+}
+
+/* Here we want the physical address of the memory. This is used when
+ * initializing the contents of the area and marking the pages as reserved.
+ */
+static inline unsigned long kvirt_to_pa (unsigned long adr)
+{
+ unsigned long va, kva, ret;
+
+ va = VMALLOC_VMADDR (adr);
+ kva = uvirt_to_kva (pgd_offset_k (va), va);
+ ret = __pa (kva);
+ return ret;
+}
+
+static void *rvmalloc (unsigned long size)
+{
+ void *mem;
+ unsigned long adr, page;
+
+ /* Round it off to PAGE_SIZE */
+ size += (PAGE_SIZE - 1);
+ size &= ~(PAGE_SIZE - 1);
+
+ 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) {
+ page = kvirt_to_pa (adr);
+ mem_map_reserve (virt_to_page (__va (page)));
+ adr += PAGE_SIZE;
+ if (size > PAGE_SIZE)
+ size -= PAGE_SIZE;
+ else
+ size = 0;
+ }
+ return mem;
+}
+
+static void rvfree (void *mem, unsigned long size)
+{
+ unsigned long adr, page;
+
+ if (!mem)
+ return;
+
+ size += (PAGE_SIZE - 1);
+ size &= ~(PAGE_SIZE - 1);
+
+ adr = (unsigned long) mem;
+ while (size > 0) {
+ page = kvirt_to_pa (adr);
+ mem_map_unreserve (virt_to_page (__va (page)));
+ adr += PAGE_SIZE;
+ if (size > PAGE_SIZE)
+ size -= PAGE_SIZE;
+ else
+ size = 0;
+ }
+ 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 (usb_set_configuration (dev->udev, configuration) < 0) {
+ PDEBUG (1, "STV(e): FAILED to set 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 */
+ swapRGB = 0;
+ PDEBUG (1, "STV(i): swapRGB is 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 *******************/
+
+/********************************************************************
+ * /proc interface
+ *******************************************************************/
+
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
+
+static struct proc_dir_entry *stv680_proc_entry = NULL;
+extern struct proc_dir_entry *video_proc_entry;
+
+#define YES_NO(x) ((x) ? "yes" : "no")
+
+static int stv680_read_proc (char *page, char **start, off_t off, int count, int
+*eof, void *data)
+{
+ char *out = page;
+ int len;
+ struct usb_stv *stv680 = data;
+
+ /* Stay under PAGE_SIZE or else bla bla bla.... */
+
+ out += sprintf (out, "driver_version : %s\n", DRIVER_VERSION);
+ out += sprintf (out, "model : %s\n", stv680->camera_name);
+ out += sprintf (out, "in use : %s\n", YES_NO (stv680->user));
+ out += sprintf (out, "streaming : %s\n", YES_NO (stv680->streaming));
+ out += sprintf (out, "num_frames : %d\n", STV680_NUMFRAMES);
+
+ out += sprintf (out, "Current size : %ix%i\n", stv680->vwidth,
+stv680->vheight);
+ out += sprintf (out, "swapRGB : %s\n", YES_NO (swapRGB));
+ out += sprintf (out, "Palette : %i", stv680->palette);
+
+ out += sprintf (out, "\n");
+
+ out += sprintf (out, "Frames total : %d\n", stv680->readcount);
+ out += sprintf (out, "Frames read : %d\n", stv680->framecount);
+ out += sprintf (out, "Packets dropped : %d\n", stv680->dropped);
+ out += sprintf (out, "Decoding Errors : %d\n", stv680->error);
+
+ len = out - page;
+ len -= off;
+ if (len < count) {
+ *eof = 1;
+ if (len <= 0)
+ return 0;
+ } else
+ len = count;
+
+ *start = page + off;
+ return len;
+}
+
+static int create_proc_stv680_cam (struct usb_stv *stv680)
+{
+ char name[9];
+ struct proc_dir_entry *ent;
+
+ if (!stv680_proc_entry || !stv680)
+ return -1;
+
+ sprintf (name, "video%d", stv680->vdev.minor);
+
+ ent = create_proc_entry (name, S_IFREG | S_IRUGO | S_IWUSR, stv680_proc_entry);
+ if (!ent)
+ return -1;
+
+ ent->data = stv680;
+ ent->read_proc = stv680_read_proc;
+ stv680->proc_entry = ent;
+ return 0;
+}
+
+static void destroy_proc_stv680_cam (struct usb_stv *stv680)
+{
+ /* One to much, just to be sure :) */
+ char name[9];
+
+ if (!stv680 || !stv680->proc_entry)
+ return;
+
+ sprintf (name, "video%d", stv680->vdev.minor);
+ remove_proc_entry (name, stv680_proc_entry);
+ stv680->proc_entry = NULL;
+}
+
+static int proc_stv680_create (void)
+{
+ if (video_proc_entry == NULL) {
+ PDEBUG (0, "STV(e): /proc/video/ doesn't exist!");
+ return -1;
+ }
+ stv680_proc_entry = create_proc_entry ("stv680", S_IFDIR, video_proc_entry);
+
+ if (stv680_proc_entry) {
+ stv680_proc_entry->owner = THIS_MODULE;
+ } else {
+ PDEBUG (0, "STV(e): Unable to initialize /proc/video/stv680");
+ return -1;
+ }
+ return 0;
+}
+
+static void proc_stv680_destroy (void)
+{
+ if (stv680_proc_entry == NULL)
+ return;
+
+ remove_proc_entry ("stv", video_proc_entry);
+}
+#endif /* CONFIG_PROC_FS && CONFIG_VIDEO_PROC_FS */
+
+/********************************************************************
+ * 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;
+ } else {
+ stv680->chgbright = 0;
+ }
+
+ 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 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))
+ PDEBUG (0, "STV(e): urb burned down in video irq");
+ return;
+} /* _video_irq */
+
+static int stv680_start_stream (struct usb_stv *stv680)
+{
+ urb_t *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);
+ 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);
+ urb->timeout = PENCAM_TIMEOUT * 2;
+ urb->transfer_flags |= USB_QUEUE_BULK;
+ stv680->urb[i] = urb;
+ err = usb_submit_urb (stv680->urb[i]);
+ 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]) {
+ stv680->urb[i]->next = NULL;
+ usb_unlink_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)) {
+ width = 160;
+ height = 120;
+ } else if ((width >= 172) && (width <= 180)) {
+ width = 176;
+ height = 144;
+ } else if ((width >= 318) && (width <= 350)) {
+ width = 320;
+ height = 240;
+ } else if ((width >= 350) && (width <= 358)) {
+ width = 352;
+ height = 288;
+ }
+
+ /* 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 <[EMAIL PROTECTED]>
+*/
+
+#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, vstep = 1;
+ 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 == 322) || (stv680->vwidth == 320)) {
+ vw = 320;
+ vh = 240;
+ vstep = 1;
+ }
+ if ((stv680->vwidth == 352)) {
+ vw = 352;
+ vh = 288;
+ vstep = 1;
+ }
+ if ((stv680->vwidth == 160)) {
+ vw = 160;
+ vh = 120;
+ vstep = 2;
+ }
+ if ((stv680->vwidth == 176)) {
+ vw = 176;
+ vh = 144;
+ vstep = 2;
+ }
+ memset (output, 0, 3 * vw * vh); /* clear output matrix. Maybe not
+necessary. */
+
+ for (y = 0; y < vh; y++) {
+ for (x = 0; x < vw; x++) {
+
+ switch (vstep) {
+ case 1:
+ if (x & 1)
+ p = *(raw + y * w + (x >> 1));
+ else
+ p = *(raw + y * w + (x >> 1) + (w >> 1));
+ break;
+
+ case 2:
+ if (x & 1)
+ p = *(raw + ((y * w) << 1) + x);
+ else
+ p = *(raw + ((y * w) << 1) + x + (w >> 1));
+ break;
+ }
+
+ 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 already zeroed out with
+memset */
+ *(output + i + colour) = (unsigned char) p;
+ } /* for x */
+ } /* for y */
+
+ /****** gamma correction plus hardcoded white balance */
+ /* Thanks to Alexander Schwartx <[EMAIL PROTECTED]> 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 */
+
+ /* output is RGB; some programs want BGR */
+ if (swapRGB == 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 video_device *dev, int flags)
+{
+ struct usb_stv *stv680 = (struct usb_stv *) dev;
+ int err = 0;
+
+ /* we are called with the BKL held */
+ MOD_INC_USE_COUNT;
+ 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;
+ }
+ }
+ if (err) {
+ MOD_DEC_USE_COUNT;
+ stv680->user = 0;
+ }
+
+ return err;
+}
+
+static void stv_close (struct video_device *dev)
+{
+ /* called with BKL held */
+ struct usb_stv *stv680 = (struct usb_stv *) 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) {
+ video_unregister_device (&stv680->vdev);
+ kfree (stv680);
+ stv680 = NULL;
+ PDEBUG (0, "STV(i): device unregistered");
+ }
+ MOD_DEC_USE_COUNT;
+}
+
+static long stv680_write (struct video_device *dev, const char *buf, unsigned long
+count, int noblock)
+{
+ return -EINVAL;
+}
+
+static int stv680_ioctl (struct video_device *vdev, unsigned int cmd, void *arg)
+{
+ struct usb_stv *stv680 = (struct usb_stv *) vdev;
+
+ if (!stv680->udev)
+ return -EIO;
+
+ switch (cmd) {
+ case VIDIOCGCAP:{
+ struct video_capability b;
+
+ 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;
+
+ if (copy_to_user (arg, &b, sizeof (b))) {
+ PDEBUG (2, "STV(e): VIDIOCGGAP failed");
+ return -EFAULT;
+ }
+ return 0;
+ }
+ case VIDIOCGCHAN:{
+ struct video_channel v;
+
+ if (copy_from_user (&v, arg, sizeof (v)))
+ return -EFAULT;
+ if (v.channel != 0)
+ return -EINVAL;
+
+ v.flags = 0;
+ v.tuners = 0;
+ v.type = VIDEO_TYPE_CAMERA;
+ strcpy (v.name, "STV Camera");
+
+ if (copy_to_user (arg, &v, sizeof (v))) {
+ PDEBUG (2, "STV(e): VIDIOCGCHAN failed");
+ return -EFAULT;
+ }
+ return 0;
+ }
+ case VIDIOCSCHAN:{
+ int v;
+
+ if (copy_from_user (&v, arg, sizeof (v))) {
+ PDEBUG (2, "STV(e): VIDIOCSCHAN failed");
+ return -EFAULT;
+ }
+ if (v != 0)
+ return -EINVAL;
+
+ return 0;
+ }
+ case VIDIOCGPICT:{
+ struct video_picture p;
+
+ stv680_get_pict (stv680, &p);
+ if (copy_to_user (arg, &p, sizeof (p))) {
+ PDEBUG (2, "STV(e): VIDIOCGPICT failed");
+ return -EFAULT;
+ }
+ return 0;
+ }
+ case VIDIOCSPICT:{
+ struct video_picture p;
+
+ if (copy_from_user (&p, arg, sizeof (p))) {
+ PDEBUG (2, "STV(e): VIDIOCSPICT failed");
+ return -EFAULT;
+ }
+ copy_from_user (&p, arg, sizeof (p));
+ PDEBUG (2, "STV(i): palette set to RGB in VIDIOSPICT");
+
+ if (stv680_set_pict (stv680, &p))
+ return -EINVAL;
+ return 0;
+ }
+ case VIDIOCSWIN:{
+ struct video_window vw;
+
+ if (copy_from_user (&vw, arg, sizeof (vw)))
+ return -EFAULT;
+ 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;
+
+ vw.x = 0; /* FIXME */
+ vw.y = 0;
+ vw.chromakey = 0;
+ vw.flags = 0;
+ vw.clipcount = 0;
+ vw.width = stv680->vwidth;
+ vw.height = stv680->vheight;
+
+ if (copy_to_user (arg, &vw, sizeof (vw))) {
+ PDEBUG (2, "STV(e): VIDIOCGWIN failed");
+ return -EFAULT;
+ }
+ return 0;
+ }
+ case VIDIOCGMBUF:{
+ struct video_mbuf vm;
+ 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;
+
+ if (copy_to_user ((void *) arg, (void *) &vm, sizeof (vm))) {
+ PDEBUG (2, "STV(e): VIDIOCGMBUF failed");
+ return -EFAULT;
+ }
+
+ return 0;
+ }
+ case VIDIOCMCAPTURE:{
+ struct video_mmap vm;
+
+ if (copy_from_user (&vm, arg, sizeof (vm))) {
+ PDEBUG (2, "STV(e): VIDIOCMCAPTURE failed");
+ return -EFAULT;
+ }
+ 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) {
+ PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is
+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_UNUSED) {
+ PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate !=
+FRAME_UNUSED");
+ 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, ret = 0;
+
+ if (copy_from_user ((void *) &frame, arg, sizeof (int))) {
+ PDEBUG (2, "STV(e): VIDIOCSYNC failed");
+ return -EFAULT;
+ }
+ 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;
+
+ memset (&vb, 0, sizeof (vb));
+ vb.base = NULL; /* frame buffer not supported, not used */
+
+ if (copy_to_user ((void *) arg, (void *) &vb, sizeof (vb))) {
+ PDEBUG (2, "STV(e): VIDIOCSYNC failed");
+ return -EFAULT;
+ }
+ return 0;
+ }
+ case VIDIOCKEY:
+ return 0;
+ case VIDIOCCAPTURE:
+ {
+ PDEBUG (2, "STV(e): VIDIOCCAPTURE failed");
+ return -EINVAL;
+ }
+ case VIDIOCSFBUF:
+ return -EINVAL;
+ case VIDIOCGTUNER:
+ case VIDIOCSTUNER:
+ return -EINVAL;
+ case VIDIOCGFREQ:
+ case VIDIOCSFREQ:
+ return -EINVAL;
+ case VIDIOCGAUDIO:
+ case VIDIOCSAUDIO:
+ return -EINVAL;
+ default:
+ return -ENOIOCTLCMD;
+ } /* end switch */
+
+ return 0;
+}
+
+static int stv680_mmap (struct video_device *dev, const char *adr, unsigned long size)
+{
+ struct usb_stv *stv680 = (struct usb_stv *) dev;
+ unsigned long start = (unsigned long) adr;
+ 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 = kvirt_to_pa (pos);
+ if (remap_page_range (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 long stv680_read (struct video_device *dev, char *buf, unsigned long count,
+int noblock)
+{
+ unsigned long int realcount = count;
+ int ret = 0;
+ struct usb_stv *stv680 = (struct usb_stv *) 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 int stv_init_done (struct video_device *dev)
+{
+
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
+ if (create_proc_stv680_cam ((struct usb_stv *) dev) < 0)
+ return -1;
+#endif
+ return 0;
+}
+
+static struct video_device stv680_template = {
+ owner: THIS_MODULE,
+ name: "STV0680 USB camera",
+ type: VID_TYPE_CAPTURE,
+ hardware: VID_HARDWARE_SE401,
+ open: stv_open,
+ close: stv_close,
+ read: stv680_read,
+ write: stv680_write,
+ ioctl: stv680_ioctl,
+ mmap: stv680_mmap,
+ initialize: stv_init_done,
+};
+
+static void *__devinit stv680_probe (struct usb_device *dev, unsigned int ifnum,
+const struct usb_device_id *id)
+{
+ struct usb_interface_descriptor *interface;
+ struct usb_stv *stv680;
+ char *camera_name = NULL;
+
+ /* We don't handle multi-config cameras */
+ if (dev->descriptor.bNumConfigurations != 1) {
+ PDEBUG (0, "STV(e): Number of Configurations != 1");
+ return NULL;
+ }
+
+ interface = &dev->actconfig->interface[ifnum].altsetting[0];
+ /* Is it a STV680? */
+ if ((dev->descriptor.idVendor == USB_PENCAM_VENDOR_ID) &&
+(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.");
+ return NULL;
+ }
+ /* We found one */
+ if ((stv680 = kmalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) {
+ PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct.");
+ return NULL;
+ }
+
+ memset (stv680, 0, sizeof (*stv680));
+
+ stv680->udev = dev;
+ stv680->camera_name = camera_name;
+
+ memcpy (&stv680->vdev, &stv680_template, sizeof (stv680_template));
+ 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) {
+ kfree (stv680);
+ PDEBUG (0, "STV(e): video_register_device failed");
+ return NULL;
+ }
+ PDEBUG (0, "STV(i): registered new video device: video%d", stv680->vdev.minor);
+
+ return stv680;
+}
+
+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]) {
+ stv680->urb[i]->next = NULL;
+ usb_unlink_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++)
+ if (stv680->scratch[i].data) {
+ kfree (stv680->scratch[i].data);
+ }
+ PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
+
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
+ destroy_proc_stv680_cam (stv680);
+#endif
+ /* Free the memory */
+ kfree (stv680);
+}
+
+static void stv680_disconnect (struct usb_device *dev, void *ptr)
+{
+ struct usb_stv *stv680 = (struct usb_stv *) ptr;
+
+ lock_kernel ();
+ /* We don't want people trying to open up the device */
+ if (!stv680->user) {
+ video_unregister_device (&stv680->vdev);
+ usb_stv680_remove_disconnected (stv680);
+ } else {
+ stv680->removed = 1;
+ }
+ unlock_kernel ();
+}
+
+static struct usb_driver stv680_driver = {
+ name: "stv680",
+ probe: stv680_probe,
+ disconnect: stv680_disconnect,
+ id_table: device_table
+};
+
+/********************************************************************
+ * Module routines
+ ********************************************************************/
+
+static int __init usb_stv680_init (void)
+{
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
+ if (proc_stv680_create () < 0)
+ return -1;
+#endif
+ 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");
+
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_VIDEO_PROC_FS)
+ proc_stv680_destroy ();
+#endif
+}
+
+module_init (usb_stv680_init);
+module_exit (usb_stv680_exit);
diff -Nru a/drivers/usb/stv680.h b/drivers/usb/stv680.h
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/usb/stv680.h Fri Dec 21 12:58:16 2001
@@ -0,0 +1,222 @@
+/****************************************************************************
+ *
+ * Filename: stv680.h
+ *
+ * Description:
+ * This is a USB driver for STV0680 based usb video cameras.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/* size of usb transfers */
+#define STV680_PACKETSIZE 4096
+
+/* number of queued bulk transfers to use, may have problems if > 1 */
+#define STV680_NUMSBUF 1
+
+/* number of frames supported by the v4l part */
+#define STV680_NUMFRAMES 2
+
+/* scratch buffers for passing data to the decoders: 2 or 4 are good */
+#define STV680_NUMSCRATCH 2
+
+/* number of nul sized packets to receive before kicking the camera */
+#define STV680_MAX_NULLPACKETS 200
+
+/* number of decoding errors before kicking the camera */
+#define STV680_MAX_ERRORS 100
+
+#define USB_PENCAM_VENDOR_ID 0x0553
+#define USB_PENCAM_PRODUCT_ID 0x0202
+#define PENCAM_TIMEOUT 1000
+/* fmt 4 */
+#define STV_VIDEO_PALETTE VIDEO_PALETTE_RGB24
+
+static __devinitdata struct usb_device_id device_table[] = {
+ {USB_DEVICE (USB_PENCAM_VENDOR_ID, USB_PENCAM_PRODUCT_ID)},
+ {}
+};
+MODULE_DEVICE_TABLE (usb, device_table);
+
+struct stv680_sbuf {
+ unsigned char *data;
+};
+
+enum {
+ FRAME_UNUSED, /* Unused (no MCAPTURE) */
+ FRAME_READY, /* Ready to start grabbing */
+ FRAME_GRABBING, /* In the process of being grabbed into */
+ FRAME_DONE, /* Finished grabbing, but not been synced yet */
+ FRAME_ERROR, /* Something bad happened while processing */
+};
+
+enum {
+ BUFFER_UNUSED,
+ BUFFER_READY,
+ BUFFER_BUSY,
+ BUFFER_DONE,
+};
+
+/* raw camera data <- sbuf (urb transfer buf) */
+struct stv680_scratch {
+ unsigned char *data;
+ volatile int state;
+ int offset;
+ int length;
+};
+
+/* processed data for display ends up here, after bayer */
+struct stv680_frame {
+ unsigned char *data; /* Frame buffer */
+ volatile int grabstate; /* State of grabbing */
+ unsigned char *curline;
+ int curlinepix;
+ int curpix;
+};
+
+/* this is almost the video structure uvd_t, with extra parameters for stv */
+struct usb_stv {
+ struct video_device vdev;
+
+ struct usb_device *udev;
+
+ unsigned char bulk_in_endpointAddr; /* __u8 the address of the bulk in
+endpoint */
+ char *camera_name;
+
+ unsigned int VideoMode; /* 0x0100 = VGA, 0x0000 = CIF, 0x0300 = QVGA */
+ int SupportedModes;
+ int CIF;
+ int VGA;
+ int QVGA;
+ int cwidth; /* camera width */
+ int cheight; /* camera height */
+ int maxwidth; /* max video width */
+ int maxheight; /* max video height */
+ int vwidth; /* current width for video window */
+ int vheight; /* current height for video window */
+ unsigned long int rawbufsize;
+ unsigned long int maxframesize; /* rawbufsize * 3 for RGB */
+
+ int origGain;
+ int origMode; /* original camera mode */
+
+ struct semaphore lock; /* to lock the structure */
+ int user; /* user count for exclusive use */
+ int removed; /* device disconnected */
+ int streaming; /* Are we streaming video? */
+ char *fbuf; /* Videodev buffer area */
+ urb_t *urb[STV680_NUMSBUF]; /* # of queued bulk transfers */
+ int curframe; /* Current receiving frame */
+ struct stv680_frame frame[STV680_NUMFRAMES]; /* # frames supported by v4l
+part */
+ int readcount;
+ int framecount;
+ int error;
+ int dropped;
+ int scratch_next;
+ int scratch_use;
+ int scratch_overflow;
+ struct stv680_scratch scratch[STV680_NUMSCRATCH]; /* for decoders */
+ struct stv680_sbuf sbuf[STV680_NUMSBUF];
+
+ unsigned int brightness;
+ unsigned int chgbright;
+ unsigned int whiteness;
+ unsigned int colour;
+ unsigned int contrast;
+ unsigned int hue;
+ unsigned int palette;
+ unsigned int depth; /* rgb24 in bits */
+
+ wait_queue_head_t wq; /* Processes waiting */
+
+ struct proc_dir_entry *proc_entry; /* /proc/stv680/videoX */
+ int nullpackets;
+};
+
+unsigned char red[256] = {
+ 0, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+ 21, 21, 21, 21, 21, 21, 21, 28, 34, 39, 43, 47,
+ 50, 53, 56, 59, 61, 64, 66, 68, 71, 73, 75, 77,
+ 79, 80, 82, 84, 86, 87, 89, 91, 92, 94, 95, 97,
+ 98, 100, 101, 102, 104, 105, 106, 108, 109, 110, 111, 113,
+ 114, 115, 116, 117, 118, 120, 121, 122, 123, 124, 125, 126,
+ 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138,
+ 139, 140, 141, 142, 143, 144, 144, 145, 146, 147, 148, 149,
+ 150, 151, 151, 152, 153, 154, 155, 156, 156, 157, 158, 159,
+ 160, 160, 161, 162, 163, 164, 164, 165, 166, 167, 167, 168,
+ 169, 170, 170, 171, 172, 172, 173, 174, 175, 175, 176, 177,
+ 177, 178, 179, 179, 180, 181, 182, 182, 183, 184, 184, 185,
+ 186, 186, 187, 187, 188, 189, 189, 190, 191, 191, 192, 193,
+ 193, 194, 194, 195, 196, 196, 197, 198, 198, 199, 199, 200,
+ 201, 201, 202, 202, 203, 204, 204, 205, 205, 206, 206, 207,
+ 208, 208, 209, 209, 210, 210, 211, 212, 212, 213, 213, 214,
+ 214, 215, 215, 216, 217, 217, 218, 218, 219, 219, 220, 220,
+ 221, 221, 222, 222, 223, 224, 224, 225, 225, 226, 226, 227,
+ 227, 228, 228, 229, 229, 230, 230, 231, 231, 232, 232, 233,
+ 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238, 239,
+ 239, 240, 240, 241, 241, 242, 242, 243, 243, 243, 244, 244,
+ 245, 245, 246, 246
+};
+
+unsigned char green[256] = {
+ 0, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+ 24, 24, 24, 24, 24, 24, 24, 32, 39, 45, 50, 54,
+ 58, 62, 65, 69, 71, 74, 77, 79, 83, 85, 87, 90,
+ 92, 93, 95, 98, 100, 101, 104, 106, 107, 109, 111, 113,
+ 114, 116, 118, 119, 121, 122, 124, 126, 127, 128, 129, 132,
+ 133, 134, 135, 136, 138, 140, 141, 142, 143, 145, 146, 147,
+ 148, 149, 150, 152, 153, 154, 155, 156, 157, 159, 160, 161,
+ 162, 163, 164, 166, 167, 168, 168, 169, 170, 171, 173, 174,
+ 175, 176, 176, 177, 179, 180, 181, 182, 182, 183, 184, 186,
+ 187, 187, 188, 189, 190, 191, 191, 193, 194, 195, 195, 196,
+ 197, 198, 198, 200, 201, 201, 202, 203, 204, 204, 205, 207,
+ 207, 208, 209, 209, 210, 211, 212, 212, 214, 215, 215, 216,
+ 217, 217, 218, 218, 219, 221, 221, 222, 223, 223, 224, 225,
+ 225, 226, 226, 228, 229, 229, 230, 231, 231, 232, 232, 233,
+ 235, 235, 236, 236, 237, 238, 238, 239, 239, 241, 241, 242,
+ 243, 243, 244, 244, 245, 245, 246, 248, 248, 249, 249, 250,
+ 250, 251, 251, 252, 253, 253, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255
+};
+
+unsigned char blue[256] = {
+ 0, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
+ 31, 31, 31, 31, 31, 31, 31, 41, 50, 57, 63, 69,
+ 74, 78, 82, 87, 90, 94, 97, 100, 105, 108, 111, 113,
+ 116, 118, 121, 124, 127, 128, 131, 134, 136, 139, 140, 143,
+ 145, 148, 149, 150, 153, 155, 156, 159, 161, 162, 164, 167,
+ 168, 170, 171, 173, 174, 177, 179, 180, 182, 183, 185, 186,
+ 187, 189, 190, 192, 193, 195, 196, 198, 199, 201, 202, 204,
+ 205, 207, 208, 210, 211, 213, 213, 214, 216, 217, 219, 220,
+ 222, 223, 223, 224, 226, 227, 229, 230, 230, 232, 233, 235,
+ 236, 236, 238, 239, 241, 242, 242, 244, 245, 247, 247, 248,
+ 250, 251, 251, 253, 254, 254, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255
+};
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