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linux/drivers/media/video/usbvideo/konicawc.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*
* konicawc.c - konica webcam driver
*
* Author: Simon Evans <spse@secret.org.uk>
*
* Copyright (C) 2002 Simon Evans
*
* Licence: GPL
*
* Driver for USB webcams based on Konica chipset. This
* chipset is used in Intel YC76 camera.
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb/input.h>
#include "usbvideo.h"
#define MAX_BRIGHTNESS 108
#define MAX_CONTRAST 108
#define MAX_SATURATION 108
#define MAX_SHARPNESS 108
#define MAX_WHITEBAL 372
#define MAX_SPEED 6
#define MAX_CAMERAS 1
#define DRIVER_VERSION "v1.4"
#define DRIVER_DESC "Konica Webcam driver"
enum ctrl_req {
SetWhitebal = 0x01,
SetBrightness = 0x02,
SetSharpness = 0x03,
SetContrast = 0x04,
SetSaturation = 0x05,
};
enum frame_sizes {
SIZE_160X120 = 0,
SIZE_160X136 = 1,
SIZE_176X144 = 2,
SIZE_320X240 = 3,
};
#define MAX_FRAME_SIZE SIZE_320X240
static struct usbvideo *cams;
#ifdef CONFIG_USB_DEBUG
static int debug;
#define DEBUG(n, format, arg...) \
if (n <= debug) { \
printk(KERN_DEBUG __FILE__ ":%s(): " format "\n", __FUNCTION__ , ## arg); \
}
#else
#define DEBUG(n, arg...)
static const int debug = 0;
#endif
/* Some default values for initial camera settings,
can be set by modprobe */
static int size;
static int speed = 6; /* Speed (fps) 0 (slowest) to 6 (fastest) */
static int brightness = MAX_BRIGHTNESS/2;
static int contrast = MAX_CONTRAST/2;
static int saturation = MAX_SATURATION/2;
static int sharpness = MAX_SHARPNESS/2;
static int whitebal = 3*(MAX_WHITEBAL/4);
static const int spd_to_iface[] = { 1, 0, 3, 2, 4, 5, 6 };
/* These FPS speeds are from the windows config box. They are
* indexed on size (0-2) and speed (0-6). Divide by 3 to get the
* real fps.
*/
static const int spd_to_fps[][7] = { { 24, 40, 48, 60, 72, 80, 100 },
{ 24, 40, 48, 60, 72, 80, 100 },
{ 18, 30, 36, 45, 54, 60, 75 },
{ 6, 10, 12, 15, 18, 21, 25 } };
struct cam_size {
u16 width;
u16 height;
u8 cmd;
};
static const struct cam_size camera_sizes[] = { { 160, 120, 0x7 },
{ 160, 136, 0xa },
{ 176, 144, 0x4 },
{ 320, 240, 0x5 } };
struct konicawc {
u8 brightness; /* camera uses 0 - 9, x11 for real value */
u8 contrast; /* as above */
u8 saturation; /* as above */
u8 sharpness; /* as above */
u8 white_bal; /* 0 - 33, x11 for real value */
u8 speed; /* Stored as 0 - 6, used as index in spd_to_* (above) */
u8 size; /* Frame Size */
int height;
int width;
struct urb *sts_urb[USBVIDEO_NUMSBUF];
u8 sts_buf[USBVIDEO_NUMSBUF][FRAMES_PER_DESC];
struct urb *last_data_urb;
int lastframe;
int cur_frame_size; /* number of bytes in current frame size */
int maxline; /* number of lines per frame */
int yplanesz; /* Number of bytes in the Y plane */
unsigned int buttonsts:1;
#ifdef CONFIG_INPUT
struct input_dev *input;
char input_physname[64];
#endif
};
#define konicawc_set_misc(uvd, req, value, index) konicawc_ctrl_msg(uvd, USB_DIR_OUT, req, value, index, NULL, 0)
#define konicawc_get_misc(uvd, req, value, index, buf, sz) konicawc_ctrl_msg(uvd, USB_DIR_IN, req, value, index, buf, sz)
#define konicawc_set_value(uvd, value, index) konicawc_ctrl_msg(uvd, USB_DIR_OUT, 2, value, index, NULL, 0)
static int konicawc_ctrl_msg(struct uvd *uvd, u8 dir, u8 request, u16 value, u16 index, void *buf, int len)
{
int retval = usb_control_msg(uvd->dev,
dir ? usb_rcvctrlpipe(uvd->dev, 0) : usb_sndctrlpipe(uvd->dev, 0),
request, 0x40 | dir, value, index, buf, len, 1000);
return retval < 0 ? retval : 0;
}
static inline void konicawc_camera_on(struct uvd *uvd)
{
DEBUG(0, "camera on");
konicawc_set_misc(uvd, 0x2, 1, 0x0b);
}
static inline void konicawc_camera_off(struct uvd *uvd)
{
DEBUG(0, "camera off");
konicawc_set_misc(uvd, 0x2, 0, 0x0b);
}
static void konicawc_set_camera_size(struct uvd *uvd)
{
struct konicawc *cam = (struct konicawc *)uvd->user_data;
konicawc_set_misc(uvd, 0x2, camera_sizes[cam->size].cmd, 0x08);
cam->width = camera_sizes[cam->size].width;
cam->height = camera_sizes[cam->size].height;
cam->yplanesz = cam->height * cam->width;
cam->cur_frame_size = (cam->yplanesz * 3) / 2;
cam->maxline = cam->yplanesz / 256;
uvd->videosize = VIDEOSIZE(cam->width, cam->height);
}
static int konicawc_setup_on_open(struct uvd *uvd)
{
struct konicawc *cam = (struct konicawc *)uvd->user_data;
DEBUG(1, "setting brightness to %d (%d)", cam->brightness,
cam->brightness * 11);
konicawc_set_value(uvd, cam->brightness, SetBrightness);
DEBUG(1, "setting white balance to %d (%d)", cam->white_bal,
cam->white_bal * 11);
konicawc_set_value(uvd, cam->white_bal, SetWhitebal);
DEBUG(1, "setting contrast to %d (%d)", cam->contrast,
cam->contrast * 11);
konicawc_set_value(uvd, cam->contrast, SetContrast);
DEBUG(1, "setting saturation to %d (%d)", cam->saturation,
cam->saturation * 11);
konicawc_set_value(uvd, cam->saturation, SetSaturation);
DEBUG(1, "setting sharpness to %d (%d)", cam->sharpness,
cam->sharpness * 11);
konicawc_set_value(uvd, cam->sharpness, SetSharpness);
konicawc_set_camera_size(uvd);
cam->lastframe = -2;
cam->buttonsts = 0;
return 0;
}
static void konicawc_adjust_picture(struct uvd *uvd)
{
struct konicawc *cam = (struct konicawc *)uvd->user_data;
konicawc_camera_off(uvd);
DEBUG(1, "new brightness: %d", uvd->vpic.brightness);
uvd->vpic.brightness = (uvd->vpic.brightness > MAX_BRIGHTNESS) ? MAX_BRIGHTNESS : uvd->vpic.brightness;
if(cam->brightness != uvd->vpic.brightness / 11) {
cam->brightness = uvd->vpic.brightness / 11;
DEBUG(1, "setting brightness to %d (%d)", cam->brightness,
cam->brightness * 11);
konicawc_set_value(uvd, cam->brightness, SetBrightness);
}
DEBUG(1, "new contrast: %d", uvd->vpic.contrast);
uvd->vpic.contrast = (uvd->vpic.contrast > MAX_CONTRAST) ? MAX_CONTRAST : uvd->vpic.contrast;
if(cam->contrast != uvd->vpic.contrast / 11) {
cam->contrast = uvd->vpic.contrast / 11;
DEBUG(1, "setting contrast to %d (%d)", cam->contrast,
cam->contrast * 11);
konicawc_set_value(uvd, cam->contrast, SetContrast);
}
konicawc_camera_on(uvd);
}
#ifdef CONFIG_INPUT
static void konicawc_register_input(struct konicawc *cam, struct usb_device *dev)
{
struct input_dev *input_dev;
int error;
usb_make_path(dev, cam->input_physname, sizeof(cam->input_physname));
strncat(cam->input_physname, "/input0", sizeof(cam->input_physname));
cam->input = input_dev = input_allocate_device();
if (!input_dev) {
warn("Not enough memory for camera's input device\n");
return;
}
input_dev->name = "Konicawc snapshot button";
input_dev->phys = cam->input_physname;
usb_to_input_id(dev, &input_dev->id);
input_dev->cdev.dev = &dev->dev;
input_dev->evbit[0] = BIT(EV_KEY);
input_dev->keybit[LONG(BTN_0)] = BIT(BTN_0);
input_dev->private = cam;
error = input_register_device(cam->input);
if (error) {
warn("Failed to register camera's input device, err: %d\n",
error);
input_free_device(cam->input);
cam->input = NULL;
}
}
static void konicawc_unregister_input(struct konicawc *cam)
{
if (cam->input) {
input_unregister_device(cam->input);
cam->input = NULL;
}
}
static void konicawc_report_buttonstat(struct konicawc *cam)
{
if (cam->input) {
input_report_key(cam->input, BTN_0, cam->buttonsts);
input_sync(cam->input);
}
}
#else
static inline void konicawc_register_input(struct konicawc *cam, struct usb_device *dev) { }
static inline void konicawc_unregister_input(struct konicawc *cam) { }
static inline void konicawc_report_buttonstat(struct konicawc *cam) { }
#endif /* CONFIG_INPUT */
static int konicawc_compress_iso(struct uvd *uvd, struct urb *dataurb, struct urb *stsurb)
{
char *cdata;
int i, totlen = 0;
unsigned char *status = stsurb->transfer_buffer;
int keep = 0, discard = 0, bad = 0;
struct konicawc *cam = (struct konicawc *)uvd->user_data;
for (i = 0; i < dataurb->number_of_packets; i++) {
int button = cam->buttonsts;
unsigned char sts;
int n = dataurb->iso_frame_desc[i].actual_length;
int st = dataurb->iso_frame_desc[i].status;
cdata = dataurb->transfer_buffer +
dataurb->iso_frame_desc[i].offset;
/* Detect and ignore errored packets */
if (st < 0) {
DEBUG(1, "Data error: packet=%d. len=%d. status=%d.",
i, n, st);
uvd->stats.iso_err_count++;
continue;
}
/* Detect and ignore empty packets */
if (n <= 0) {
uvd->stats.iso_skip_count++;
continue;
}
/* See what the status data said about the packet */
sts = *(status+stsurb->iso_frame_desc[i].offset);
/* sts: 0x80-0xff: frame start with frame number (ie 0-7f)
* otherwise:
* bit 0 0: keep packet
* 1: drop packet (padding data)
*
* bit 4 0 button not clicked
* 1 button clicked
* button is used to `take a picture' (in software)
*/
if(sts < 0x80) {
button = !!(sts & 0x40);
sts &= ~0x40;
}
/* work out the button status, but don't do
anything with it for now */
if(button != cam->buttonsts) {
DEBUG(2, "button: %sclicked", button ? "" : "un");
cam->buttonsts = button;
konicawc_report_buttonstat(cam);
}
if(sts == 0x01) { /* drop frame */
discard++;
continue;
}
if((sts > 0x01) && (sts < 0x80)) {
info("unknown status %2.2x", sts);
bad++;
continue;
}
if(!sts && cam->lastframe == -2) {
DEBUG(2, "dropping frame looking for image start");
continue;
}
keep++;
if(sts & 0x80) { /* frame start */
unsigned char marker[] = { 0, 0xff, 0, 0x00 };
if(cam->lastframe == -2) {
DEBUG(2, "found initial image");
cam->lastframe = -1;
}
marker[3] = sts & 0x7F;
RingQueue_Enqueue(&uvd->dp, marker, 4);
totlen += 4;
}
totlen += n; /* Little local accounting */
RingQueue_Enqueue(&uvd->dp, cdata, n);
}
DEBUG(8, "finished: keep = %d discard = %d bad = %d added %d bytes",
keep, discard, bad, totlen);
return totlen;
}
static void resubmit_urb(struct uvd *uvd, struct urb *urb)
{
int i, ret;
for (i = 0; i < FRAMES_PER_DESC; i++) {
urb->iso_frame_desc[i].status = 0;
}
urb->dev = uvd->dev;
urb->status = 0;
ret = usb_submit_urb(urb, GFP_ATOMIC);
DEBUG(3, "submitting urb of length %d", urb->transfer_buffer_length);
if(ret)
err("usb_submit_urb error (%d)", ret);
}
static void konicawc_isoc_irq(struct urb *urb)
{
struct uvd *uvd = urb->context;
struct konicawc *cam = (struct konicawc *)uvd->user_data;
/* We don't want to do anything if we are about to be removed! */
if (!CAMERA_IS_OPERATIONAL(uvd))
return;
if (!uvd->streaming) {
DEBUG(1, "Not streaming, but interrupt!");
return;
}
DEBUG(3, "got frame %d len = %d buflen =%d", urb->start_frame, urb->actual_length, urb->transfer_buffer_length);
uvd->stats.urb_count++;
if (urb->transfer_buffer_length > 32) {
cam->last_data_urb = urb;
return;
}
/* Copy the data received into ring queue */
if(cam->last_data_urb) {
int len = 0;
if(urb->start_frame != cam->last_data_urb->start_frame)
err("Lost sync on frames");
else if (!urb->status && !cam->last_data_urb->status)
len = konicawc_compress_iso(uvd, cam->last_data_urb, urb);
resubmit_urb(uvd, cam->last_data_urb);
resubmit_urb(uvd, urb);
cam->last_data_urb = NULL;
uvd->stats.urb_length = len;
uvd->stats.data_count += len;
if(len)
RingQueue_WakeUpInterruptible(&uvd->dp);
return;
}
return;
}
static int konicawc_start_data(struct uvd *uvd)
{
struct usb_device *dev = uvd->dev;
int i, errFlag;
struct konicawc *cam = (struct konicawc *)uvd->user_data;
int pktsz;
struct usb_interface *intf;
struct usb_host_interface *interface = NULL;
intf = usb_ifnum_to_if(dev, uvd->iface);
if (intf)
interface = usb_altnum_to_altsetting(intf,
spd_to_iface[cam->speed]);
if (!interface)
return -ENXIO;
pktsz = le16_to_cpu(interface->endpoint[1].desc.wMaxPacketSize);
DEBUG(1, "pktsz = %d", pktsz);
if (!CAMERA_IS_OPERATIONAL(uvd)) {
err("Camera is not operational");
return -EFAULT;
}
uvd->curframe = -1;
konicawc_camera_on(uvd);
/* Alternate interface 1 is is the biggest frame size */
i = usb_set_interface(dev, uvd->iface, uvd->ifaceAltActive);
if (i < 0) {
err("usb_set_interface error");
uvd->last_error = i;
return -EBUSY;
}
/* We double buffer the Iso lists */
for (i=0; i < USBVIDEO_NUMSBUF; i++) {
int j, k;
struct urb *urb = uvd->sbuf[i].urb;
urb->dev = dev;
urb->context = uvd;
urb->pipe = usb_rcvisocpipe(dev, uvd->video_endp);
urb->interval = 1;
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = uvd->sbuf[i].data;
urb->complete = konicawc_isoc_irq;
urb->number_of_packets = FRAMES_PER_DESC;
urb->transfer_buffer_length = pktsz * FRAMES_PER_DESC;
for (j=k=0; j < FRAMES_PER_DESC; j++, k += pktsz) {
urb->iso_frame_desc[j].offset = k;
urb->iso_frame_desc[j].length = pktsz;
}
urb = cam->sts_urb[i];
urb->dev = dev;
urb->context = uvd;
urb->pipe = usb_rcvisocpipe(dev, uvd->video_endp-1);
urb->interval = 1;
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = cam->sts_buf[i];
urb->complete = konicawc_isoc_irq;
urb->number_of_packets = FRAMES_PER_DESC;
urb->transfer_buffer_length = FRAMES_PER_DESC;
for (j=0; j < FRAMES_PER_DESC; j++) {
urb->iso_frame_desc[j].offset = j;
urb->iso_frame_desc[j].length = 1;
}
}
cam->last_data_urb = NULL;
/* Submit all URBs */
for (i=0; i < USBVIDEO_NUMSBUF; i++) {
errFlag = usb_submit_urb(cam->sts_urb[i], GFP_KERNEL);
if (errFlag)
err("usb_submit_isoc(%d) ret %d", i, errFlag);
errFlag = usb_submit_urb(uvd->sbuf[i].urb, GFP_KERNEL);
if (errFlag)
err ("usb_submit_isoc(%d) ret %d", i, errFlag);
}
uvd->streaming = 1;
DEBUG(1, "streaming=1 video_endp=$%02x", uvd->video_endp);
return 0;
}
static void konicawc_stop_data(struct uvd *uvd)
{
int i, j;
struct konicawc *cam;
if ((uvd == NULL) || (!uvd->streaming) || (uvd->dev == NULL))
return;
konicawc_camera_off(uvd);
uvd->streaming = 0;
cam = (struct konicawc *)uvd->user_data;
cam->last_data_urb = NULL;
/* Unschedule all of the iso td's */
for (i=0; i < USBVIDEO_NUMSBUF; i++) {
usb_kill_urb(uvd->sbuf[i].urb);
usb_kill_urb(cam->sts_urb[i]);
}
if (!uvd->remove_pending) {
/* Set packet size to 0 */
j = usb_set_interface(uvd->dev, uvd->iface, uvd->ifaceAltInactive);
if (j < 0) {
err("usb_set_interface() error %d.", j);
uvd->last_error = j;
}
}
}
static void konicawc_process_isoc(struct uvd *uvd, struct usbvideo_frame *frame)
{
struct konicawc *cam = (struct konicawc *)uvd->user_data;
int maxline = cam->maxline;
int yplanesz = cam->yplanesz;
assert(frame != NULL);
DEBUG(5, "maxline = %d yplanesz = %d", maxline, yplanesz);
DEBUG(3, "Frame state = %d", frame->scanstate);
if(frame->scanstate == ScanState_Scanning) {
int drop = 0;
int curframe;
int fdrops = 0;
DEBUG(3, "Searching for marker, queue len = %d", RingQueue_GetLength(&uvd->dp));
while(RingQueue_GetLength(&uvd->dp) >= 4) {
if ((RING_QUEUE_PEEK(&uvd->dp, 0) == 0x00) &&
(RING_QUEUE_PEEK(&uvd->dp, 1) == 0xff) &&
(RING_QUEUE_PEEK(&uvd->dp, 2) == 0x00) &&
(RING_QUEUE_PEEK(&uvd->dp, 3) < 0x80)) {
curframe = RING_QUEUE_PEEK(&uvd->dp, 3);
if(cam->lastframe >= 0) {
fdrops = (0x80 + curframe - cam->lastframe) & 0x7F;
fdrops--;
if(fdrops) {
info("Dropped %d frames (%d -> %d)", fdrops,
cam->lastframe, curframe);
}
}
cam->lastframe = curframe;
frame->curline = 0;
frame->scanstate = ScanState_Lines;
RING_QUEUE_DEQUEUE_BYTES(&uvd->dp, 4);
break;
}
RING_QUEUE_DEQUEUE_BYTES(&uvd->dp, 1);
drop++;
}
if(drop)
DEBUG(2, "dropped %d bytes looking for new frame", drop);
}
if(frame->scanstate == ScanState_Scanning)
return;
/* Try to move data from queue into frame buffer
* We get data in blocks of 384 bytes made up of:
* 256 Y, 64 U, 64 V.
* This needs to be written out as a Y plane, a U plane and a V plane.
*/
while ( frame->curline < maxline && (RingQueue_GetLength(&uvd->dp) >= 384)) {
/* Y */
RingQueue_Dequeue(&uvd->dp, frame->data + (frame->curline * 256), 256);
/* U */
RingQueue_Dequeue(&uvd->dp, frame->data + yplanesz + (frame->curline * 64), 64);
/* V */
RingQueue_Dequeue(&uvd->dp, frame->data + (5 * yplanesz)/4 + (frame->curline * 64), 64);
frame->seqRead_Length += 384;
frame->curline++;
}
/* See if we filled the frame */
if (frame->curline == maxline) {
DEBUG(5, "got whole frame");
frame->frameState = FrameState_Done_Hold;
frame->curline = 0;
uvd->curframe = -1;
uvd->stats.frame_num++;
}
}
static int konicawc_find_fps(int size, int fps)
{
int i;
fps *= 3;
DEBUG(1, "konica_find_fps: size = %d fps = %d", size, fps);
if(fps <= spd_to_fps[size][0])
return 0;
if(fps >= spd_to_fps[size][MAX_SPEED])
return MAX_SPEED;
for(i = 0; i < MAX_SPEED; i++) {
if((fps >= spd_to_fps[size][i]) && (fps <= spd_to_fps[size][i+1])) {
DEBUG(2, "fps %d between %d and %d", fps, i, i+1);
if( (fps - spd_to_fps[size][i]) < (spd_to_fps[size][i+1] - fps))
return i;
else
return i+1;
}
}
return MAX_SPEED+1;
}
static int konicawc_set_video_mode(struct uvd *uvd, struct video_window *vw)
{
struct konicawc *cam = (struct konicawc *)uvd->user_data;
int newspeed = cam->speed;
int newsize;
int x = vw->width;
int y = vw->height;
int fps = vw->flags;
if(x > 0 && y > 0) {
DEBUG(2, "trying to find size %d,%d", x, y);
for(newsize = 0; newsize <= MAX_FRAME_SIZE; newsize++) {
if((camera_sizes[newsize].width == x) && (camera_sizes[newsize].height == y))
break;
}
} else {
newsize = cam->size;
}
if(newsize > MAX_FRAME_SIZE) {
DEBUG(1, "couldn't find size %d,%d", x, y);
return -EINVAL;
}
if(fps > 0) {
DEBUG(1, "trying to set fps to %d", fps);
newspeed = konicawc_find_fps(newsize, fps);
DEBUG(1, "find_fps returned %d (%d)", newspeed, spd_to_fps[newsize][newspeed]);
}
if(newspeed > MAX_SPEED)
return -EINVAL;
DEBUG(1, "setting size to %d speed to %d", newsize, newspeed);
if((newsize == cam->size) && (newspeed == cam->speed)) {
DEBUG(1, "Nothing to do");
return 0;
}
DEBUG(0, "setting to %dx%d @ %d fps", camera_sizes[newsize].width,
camera_sizes[newsize].height, spd_to_fps[newsize][newspeed]/3);
konicawc_stop_data(uvd);
uvd->ifaceAltActive = spd_to_iface[newspeed];
DEBUG(1, "new interface = %d", uvd->ifaceAltActive);
cam->speed = newspeed;
if(cam->size != newsize) {
cam->size = newsize;
konicawc_set_camera_size(uvd);
}
/* Flush the input queue and clear any current frame in progress */
RingQueue_Flush(&uvd->dp);
cam->lastframe = -2;
if(uvd->curframe != -1) {
uvd->frame[uvd->curframe].curline = 0;
uvd->frame[uvd->curframe].seqRead_Length = 0;
uvd->frame[uvd->curframe].seqRead_Index = 0;
}
konicawc_start_data(uvd);
return 0;
}
static int konicawc_calculate_fps(struct uvd *uvd)
{
struct konicawc *cam = uvd->user_data;
return spd_to_fps[cam->size][cam->speed]/3;
}
static void konicawc_configure_video(struct uvd *uvd)
{
struct konicawc *cam = (struct konicawc *)uvd->user_data;
u8 buf[2];
memset(&uvd->vpic, 0, sizeof(uvd->vpic));
memset(&uvd->vpic_old, 0x55, sizeof(uvd->vpic_old));
RESTRICT_TO_RANGE(brightness, 0, MAX_BRIGHTNESS);
RESTRICT_TO_RANGE(contrast, 0, MAX_CONTRAST);
RESTRICT_TO_RANGE(saturation, 0, MAX_SATURATION);
RESTRICT_TO_RANGE(sharpness, 0, MAX_SHARPNESS);
RESTRICT_TO_RANGE(whitebal, 0, MAX_WHITEBAL);
cam->brightness = brightness / 11;
cam->contrast = contrast / 11;
cam->saturation = saturation / 11;
cam->sharpness = sharpness / 11;
cam->white_bal = whitebal / 11;
uvd->vpic.colour = 108;
uvd->vpic.hue = 108;
uvd->vpic.brightness = brightness;
uvd->vpic.contrast = contrast;
uvd->vpic.whiteness = whitebal;
uvd->vpic.depth = 6;
uvd->vpic.palette = VIDEO_PALETTE_YUV420P;
memset(&uvd->vcap, 0, sizeof(uvd->vcap));
strcpy(uvd->vcap.name, "Konica Webcam");
uvd->vcap.type = VID_TYPE_CAPTURE;
uvd->vcap.channels = 1;
uvd->vcap.audios = 0;
uvd->vcap.minwidth = camera_sizes[SIZE_160X120].width;
uvd->vcap.minheight = camera_sizes[SIZE_160X120].height;
uvd->vcap.maxwidth = camera_sizes[SIZE_320X240].width;
uvd->vcap.maxheight = camera_sizes[SIZE_320X240].height;
memset(&uvd->vchan, 0, sizeof(uvd->vchan));
uvd->vchan.flags = 0 ;
uvd->vchan.tuners = 0;
uvd->vchan.channel = 0;
uvd->vchan.type = VIDEO_TYPE_CAMERA;
strcpy(uvd->vchan.name, "Camera");
/* Talk to device */
DEBUG(1, "device init");
if(!konicawc_get_misc(uvd, 0x3, 0, 0x10, buf, 2))
DEBUG(2, "3,10 -> %2.2x %2.2x", buf[0], buf[1]);
if(!konicawc_get_misc(uvd, 0x3, 0, 0x10, buf, 2))
DEBUG(2, "3,10 -> %2.2x %2.2x", buf[0], buf[1]);
if(konicawc_set_misc(uvd, 0x2, 0, 0xd))
DEBUG(2, "2,0,d failed");
DEBUG(1, "setting initial values");
}
static int konicawc_probe(struct usb_interface *intf, const struct usb_device_id *devid)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct uvd *uvd = NULL;
int ix, i, nas;
int actInterface=-1, inactInterface=-1, maxPS=0;
unsigned char video_ep = 0;
DEBUG(1, "konicawc_probe(%p)", intf);
/* We don't handle multi-config cameras */
if (dev->descriptor.bNumConfigurations != 1)
return -ENODEV;
info("Konica Webcam (rev. 0x%04x)", le16_to_cpu(dev->descriptor.bcdDevice));
RESTRICT_TO_RANGE(speed, 0, MAX_SPEED);
/* Validate found interface: must have one ISO endpoint */
nas = intf->num_altsetting;
if (nas != 8) {
err("Incorrect number of alternate settings (%d) for this camera!", nas);
return -ENODEV;
}
/* Validate all alternate settings */
for (ix=0; ix < nas; ix++) {
const struct usb_host_interface *interface;
const struct usb_endpoint_descriptor *endpoint;
interface = &intf->altsetting[ix];
i = interface->desc.bAlternateSetting;
if (interface->desc.bNumEndpoints != 2) {
err("Interface %d. has %u. endpoints!",
interface->desc.bInterfaceNumber,
(unsigned)(interface->desc.bNumEndpoints));
return -ENODEV;
}
endpoint = &interface->endpoint[1].desc;
DEBUG(1, "found endpoint: addr: 0x%2.2x maxps = 0x%4.4x",
endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize));
if (video_ep == 0)
video_ep = endpoint->bEndpointAddress;
else if (video_ep != endpoint->bEndpointAddress) {
err("Alternate settings have different endpoint addresses!");
return -ENODEV;
}
if ((endpoint->bmAttributes & 0x03) != 0x01) {
err("Interface %d. has non-ISO endpoint!",
interface->desc.bInterfaceNumber);
return -ENODEV;
}
if ((endpoint->bEndpointAddress & 0x80) == 0) {
err("Interface %d. has ISO OUT endpoint!",
interface->desc.bInterfaceNumber);
return -ENODEV;
}
if (le16_to_cpu(endpoint->wMaxPacketSize) == 0) {
if (inactInterface < 0)
inactInterface = i;
else {
err("More than one inactive alt. setting!");
return -ENODEV;
}
} else {
if (i == spd_to_iface[speed]) {
/* This one is the requested one */
actInterface = i;
}
}
if (le16_to_cpu(endpoint->wMaxPacketSize) > maxPS)
maxPS = le16_to_cpu(endpoint->wMaxPacketSize);
}
if(actInterface == -1) {
err("Cant find required endpoint");
return -ENODEV;
}
DEBUG(1, "Selecting requested active setting=%d. maxPS=%d.", actInterface, maxPS);
uvd = usbvideo_AllocateDevice(cams);
if (uvd != NULL) {
struct konicawc *cam = (struct konicawc *)(uvd->user_data);
/* Here uvd is a fully allocated uvd object */
for(i = 0; i < USBVIDEO_NUMSBUF; i++) {
cam->sts_urb[i] = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL);
if(cam->sts_urb[i] == NULL) {
while(i--) {
usb_free_urb(cam->sts_urb[i]);
}
err("can't allocate urbs");
return -ENOMEM;
}
}
cam->speed = speed;
RESTRICT_TO_RANGE(size, SIZE_160X120, SIZE_320X240);
cam->width = camera_sizes[size].width;
cam->height = camera_sizes[size].height;
cam->size = size;
uvd->flags = 0;
uvd->debug = debug;
uvd->dev = dev;
uvd->iface = intf->altsetting->desc.bInterfaceNumber;
uvd->ifaceAltInactive = inactInterface;
uvd->ifaceAltActive = actInterface;
uvd->video_endp = video_ep;
uvd->iso_packet_len = maxPS;
uvd->paletteBits = 1L << VIDEO_PALETTE_YUV420P;
uvd->defaultPalette = VIDEO_PALETTE_YUV420P;
uvd->canvas = VIDEOSIZE(320, 240);
uvd->videosize = VIDEOSIZE(cam->width, cam->height);
/* Initialize konicawc specific data */
konicawc_configure_video(uvd);
i = usbvideo_RegisterVideoDevice(uvd);
uvd->max_frame_size = (320 * 240 * 3)/2;
if (i != 0) {
err("usbvideo_RegisterVideoDevice() failed.");
uvd = NULL;
}
konicawc_register_input(cam, dev);
}
if (uvd) {
usb_set_intfdata (intf, uvd);
return 0;
}
return -EIO;
}
static void konicawc_free_uvd(struct uvd *uvd)
{
int i;
struct konicawc *cam = (struct konicawc *)uvd->user_data;
konicawc_unregister_input(cam);
for (i = 0; i < USBVIDEO_NUMSBUF; i++) {
usb_free_urb(cam->sts_urb[i]);
cam->sts_urb[i] = NULL;
}
}
static struct usb_device_id id_table[] = {
{ USB_DEVICE(0x04c8, 0x0720) }, /* Intel YC 76 */
{ } /* Terminating entry */
};
static int __init konicawc_init(void)
{
struct usbvideo_cb cbTbl;
info(DRIVER_DESC " " DRIVER_VERSION);
memset(&cbTbl, 0, sizeof(cbTbl));
cbTbl.probe = konicawc_probe;
cbTbl.setupOnOpen = konicawc_setup_on_open;
cbTbl.processData = konicawc_process_isoc;
cbTbl.getFPS = konicawc_calculate_fps;
cbTbl.setVideoMode = konicawc_set_video_mode;
cbTbl.startDataPump = konicawc_start_data;
cbTbl.stopDataPump = konicawc_stop_data;
cbTbl.adjustPicture = konicawc_adjust_picture;
cbTbl.userFree = konicawc_free_uvd;
return usbvideo_register(
&cams,
MAX_CAMERAS,
sizeof(struct konicawc),
"konicawc",
&cbTbl,
THIS_MODULE,
id_table);
}
static void __exit konicawc_cleanup(void)
{
usbvideo_Deregister(&cams);
}
MODULE_DEVICE_TABLE(usb, id_table);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Simon Evans <spse@secret.org.uk>");
MODULE_DESCRIPTION(DRIVER_DESC);
module_param(speed, int, 0);
MODULE_PARM_DESC(speed, "Initial speed: 0 (slowest) - 6 (fastest)");
module_param(size, int, 0);
MODULE_PARM_DESC(size, "Initial Size 0: 160x120 1: 160x136 2: 176x144 3: 320x240");
module_param(brightness, int, 0);
MODULE_PARM_DESC(brightness, "Initial brightness 0 - 108");
module_param(contrast, int, 0);
MODULE_PARM_DESC(contrast, "Initial contrast 0 - 108");
module_param(saturation, int, 0);
MODULE_PARM_DESC(saturation, "Initial saturation 0 - 108");
module_param(sharpness, int, 0);
MODULE_PARM_DESC(sharpness, "Initial brightness 0 - 108");
module_param(whitebal, int, 0);
MODULE_PARM_DESC(whitebal, "Initial white balance 0 - 363");
#ifdef CONFIG_USB_DEBUG
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug level: 0-9 (default=0)");
#endif
module_init(konicawc_init);
module_exit(konicawc_cleanup);
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