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kernel / pub / scm / linux / kernel / git / davem / netdev-vger-cvs / 5342038eb9f9f8f6918ce43c47420ceba55dc39f / . / drivers / usb / stv680.c
blob: e5f89a3de975a710bacaeee6fa408d65934a5856 [file] [log] [blame]
/*
* 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/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; /* 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("[" __PRETTY_FUNCTION__ ":%d] " fmt, __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_PARM (debug, "i");
MODULE_PARM_DESC (debug, "Debug enabled or not");
MODULE_PARM (swapRGB_on, "i");
MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never");
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;
if ((swapRGB_on == 0) && (swapRGB == 0))
PDEBUG (1, "STV(i): swapRGB is (auto) OFF");
else if ((swapRGB_on == 1) && (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 *******************/
/********************************************************************
* /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")
#define ON_OFF(x) ((x) ? "(auto) on" : "(auto) off")
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);
if (swapRGB_on == 0)
out += sprintf (out, "swapRGB : %s\n", ON_OFF (swapRGB));
else if (swapRGB_on == 1)
out += sprintf (out, "swapRGB : (forced) on\n");
else if (swapRGB_on == -1)
out += sprintf (out, "swapRGB : (forced) off\n");
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 ("stv680", 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;
}
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)
{
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);
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) && (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 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 %i in VIDIOSPICT", p.palette);
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) && (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, 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 vm_area_struct *vma, 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 (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 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);