patch-2.4.5 linux/drivers/usb/pwc-ctrl.c

• Lines: 936
• Date: Fri May 25 09:48:50 2001
• Orig file: v2.4.4/linux/drivers/usb/pwc-ctrl.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.4/linux/drivers/usb/pwc-ctrl.c linux/drivers/usb/pwc-ctrl.c
@@ -0,0 +1,935 @@
+/* Driver for Philips webcam
+   Functions that send various control messages to the webcam, including
+   video modes.
+   (C) 1999-2001 Nemosoft Unv. (webcam@smcc.demon.nl)
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/* Control functions for the cam; brightness, contrast, video mode, etc. */
+
+#ifdef __KERNEL__
+#include <asm/uaccess.h> 
+#endif
+#include <asm/errno.h>
+ 
+#include "pwc.h"
+#include "pwc-ioctl.h"
+#include "pwc-uncompress.h"
+
+/* Request types: video */
+#define SET_LUM_CTL			0x01
+#define GET_LUM_CTL			0x02
+#define SET_CHROM_CTL			0x03
+#define GET_CHROM_CTL			0x04
+#define SET_STATUS_CTL			0x05
+#define GET_STATUS_CTL			0x06
+#define SET_EP_STREAM_CTL		0x07
+#define GET_EP_STREAM_CTL		0x08
+
+/* Selectors for the Luminance controls [GS]ET_LUM_CTL */
+#define AGC_MODE_FORMATTER			0x2000
+#define PRESET_AGC_FORMATTER			0x2100
+#define SHUTTER_MODE_FORMATTER			0x2200
+#define PRESET_SHUTTER_FORMATTER		0x2300
+#define PRESET_CONTOUR_FORMATTER		0x2400
+#define AUTO_CONTOUR_FORMATTER			0x2500
+#define BACK_LIGHT_COMPENSATION_FORMATTER	0x2600
+#define CONTRAST_FORMATTER			0x2700
+#define DYNAMIC_NOISE_CONTROL_FORMATTER		0x2800
+#define FLICKERLESS_MODE_FORMATTER		0x2900
+#define AE_CONTROL_SPEED			0x2A00
+#define BRIGHTNESS_FORMATTER			0x2B00
+#define GAMMA_FORMATTER				0x2C00
+
+/* Selectors for the Chrominance controls [GS]ET_CHROM_CTL */
+#define WB_MODE_FORMATTER			0x1000
+#define AWB_CONTROL_SPEED_FORMATTER		0x1100
+#define AWB_CONTROL_DELAY_FORMATTER		0x1200
+#define PRESET_MANUAL_RED_GAIN_FORMATTER	0x1300
+#define PRESET_MANUAL_BLUE_GAIN_FORMATTER	0x1400
+#define COLOUR_MODE_FORMATTER			0x1500
+#define SATURATION_MODE_FORMATTER1		0x1600
+#define SATURATION_MODE_FORMATTER2		0x1700
+
+/* Selectors for the Status controls [GS]ET_STATUS_CTL */
+#define SAVE_USER_DEFAULTS_FORMATTER		0x0200
+#define RESTORE_USER_DEFAULTS_FORMATTER		0x0300
+#define RESTORE_FACTORY_DEFAULTS_FORMATTER	0x0400
+#define READ_AGC_FORMATTER			0x0500
+#define READ_SHUTTER_FORMATTER			0x0600
+#define READ_RED_GAIN_FORMATTER			0x0700
+#define READ_BLUE_GAIN_FORMATTER		0x0800
+#define READ_RAW_Y_MEAN_FORMATTER		0x3100
+#define SET_POWER_SAVE_MODE_FORMATTER		0x3200
+#define MIRROR_IMAGE_FORMATTER			0x3300
+#define LED_FORMATTER				0x3400
+
+/* Formatters for the Video Endpoint controls [GS]ET_EP_STREAM_CTL */
+#define VIDEO_OUTPUT_CONTROL_FORMATTER		0x0100
+
+static char *size2name[PSZ_MAX] =
+{
+	"subQCIF",
+	"QSIF",
+	"QCIF",
+	"SIF",
+	"CIF",
+	"VGA",
+};  
+
+/********/
+
+/* Entries for the Nala (645/646) camera; the Nala doesn't have compression 
+   preferences, so you either get compressed or non-compressed streams.
+   
+   An alternate value of 0 means this mode is not available at all.
+ */
+
+struct Nala_table_entry {
+	char alternate;			/* USB alternate setting */
+	int compressed;			/* Compressed yes/no */
+
+	unsigned char mode[3];		/* precomputed mode table */
+};
+
+static struct Nala_table_entry Nala_table[PSZ_MAX][8] =
+{
+#include "pwc_nala.h"
+};
+
+/* This tables contains entries for the 675/680/690 (Timon) camera, with
+   4 different qualities (no compression, low, medium, high).
+   It lists the bandwidth requirements for said mode by its alternate interface 
+   number. An alternate of 0 means that the mode is unavailable.
+   
+   There are 6 * 4 * 4 entries: 
+     6 different resolutions subqcif, qsif, qcif, sif, cif, vga
+     6 framerates: 5, 10, 15, 20, 25, 30
+     4 compression modi: none, low, medium, high
+     
+   When an uncompressed mode is not available, the next available compressed mode 
+   will be choosen (unless the decompressor is absent). Sometimes there are only
+   1 or 2 compressed modes available; in that case entries are duplicated.
+*/
+struct Timon_table_entry 
+{
+	char alternate;			/* USB alternate interface */
+	unsigned short packetsize;	/* Normal packet size */
+	unsigned short bandlength;	/* Bandlength when decompressing */
+	unsigned char mode[13];		/* precomputed mode settings for cam */
+};
+
+static struct Timon_table_entry Timon_table[PSZ_MAX][6][4] = 
+{
+#include "pwc_timon.h"
+};
+
+/* Entries for the Kiara (730/740) camera */
+
+struct Kiara_table_entry
+{
+	char alternate;			/* USB alternate interface */
+	unsigned short packetsize;	/* Normal packet size */
+	unsigned short bandlength;	/* Bandlength when decompressing */
+	unsigned char mode[12];		/* precomputed mode settings for cam */
+};
+
+static struct Kiara_table_entry Kiara_table[PSZ_MAX][6][4] =
+{
+#include "pwc_kiara.h"
+};
+
+
+/****************************************************************************/
+
+
+
+
+#if PWC_DEBUG
+void pwc_hexdump(void *p, int len)
+{
+	int i;
+	unsigned char *s;
+	char buf[100], *d;
+	
+	s = (unsigned char *)p;
+	d = buf;
+	*d = '\0';
+	Debug("Doing hexdump @ %p, %d bytes.\n", p, len);
+	for (i = 0; i < len; i++) {
+		d += sprintf(d, "%02X ", *s++);
+		if ((i & 0xF) == 0xF) {
+			Debug("%s\n", buf);
+			d = buf;
+			*d = '\0';
+		}
+	}
+	if ((i & 0xF) != 0)
+		Debug("%s\n", buf);
+}
+#endif
+
+static inline int send_video_command(struct usb_device *udev, int index, void *buf, int buflen)
+{
+	return usb_control_msg(udev,
+		usb_sndctrlpipe(udev, 0),
+		SET_EP_STREAM_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		VIDEO_OUTPUT_CONTROL_FORMATTER,
+		index,
+		buf, buflen, HZ);
+}
+
+
+
+static inline int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames)
+{
+	unsigned char buf[3];
+	int ret, fps;
+	struct Nala_table_entry *pEntry;
+	int frames2frames[31] = 
+	{ /* closest match of framerate */
+	   0,  0,  0,  0,  4,  /*  0-4  */
+	   5,  5,  7,  7, 10,  /*  5-9  */
+          10, 10, 12, 12, 15,  /* 10-14 */
+          15, 15, 15, 20, 20,  /* 15-19 */
+          20, 20, 20, 24, 24,  /* 20-24 */
+          24, 24, 24, 24, 24,  /* 25-29 */
+          24                   /* 30    */
+	};
+	int frames2table[31] = 
+	{ 0, 0, 0, 0, 0, /*  0-4  */
+	  1, 1, 1, 2, 2, /*  5-9  */
+	  3, 3, 4, 4, 4, /* 10-14 */
+	  5, 5, 5, 5, 5, /* 15-19 */
+	  6, 6, 6, 6, 7, /* 20-24 */
+	  7, 7, 7, 7, 7, /* 25-29 */
+	  7              /* 30    */
+	};
+	
+	if (size < 0 || size > PSZ_CIF || frames < 4 || frames > 25)
+		return -EINVAL;
+	frames = frames2frames[frames];
+	fps = frames2table[frames];
+	pEntry = &Nala_table[size][fps];
+	if (pEntry->alternate == 0)
+		return -EINVAL;
+
+	if (pEntry->compressed && pdev->decompressor == NULL)
+		return -ENOENT; /* Not supported. */
+
+	memcpy(buf, pEntry->mode, 3);	
+	ret = send_video_command(pdev->udev, pdev->vendpoint, buf, 3);
+	if (ret < 0)
+		return ret;
+	if (pEntry->compressed)
+		ret = pdev->decompressor->init(pdev->release, buf, &pdev->decompress_data);
+	if (ret < 0)
+		return ret;
+		
+	/* Set various parameters */
+	pdev->vframes = frames;
+	pdev->vsize = size;
+	pdev->valternate = pEntry->alternate;
+	pdev->image = pwc_image_sizes[size];
+	pdev->frame_size = (pdev->image.x * pdev->image.y * 3) / 2;
+	if (pEntry->compressed) {
+		if (pdev->release < 5) { /* 4 fold compression */
+			pdev->vbandlength = 528;
+			pdev->frame_size /= 4;
+		}
+		else {
+			pdev->vbandlength = 704;
+			pdev->frame_size /= 3;
+		}
+	}
+	else
+		pdev->vbandlength = 0;
+	return 0;
+}
+
+
+static inline int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames, int compression, int snapshot)
+{
+	unsigned char buf[13];
+	struct Timon_table_entry *pChoose;
+	int ret, fps;
+
+	if (size >= PSZ_MAX || frames < 5 || frames > 30 || compression < 0 || compression > 3)
+		return -EINVAL;
+	if (size == PSZ_VGA && frames > 15)
+		return -EINVAL;
+	fps = (frames / 5) - 1;
+	
+	/* Find a supported framerate with progressively higher compression ratios
+	   if the preferred ratio is not available.
+	*/
+	pChoose = NULL;
+	if (pdev->decompressor == NULL) {
+#if PWC_DEBUG	
+		Debug("Trying to find uncompressed mode.\n");
+#endif
+		pChoose = &Timon_table[size][fps][0];
+	}
+	else {
+		while (compression <= 3) {
+			pChoose = &Timon_table[size][fps][compression];
+			if (pChoose->alternate != 0)
+				break;
+			compression++;	
+		}
+	}
+	if (pChoose == NULL || pChoose->alternate == 0)
+		return -ENOENT; /* Not supported. */
+
+	memcpy(buf, pChoose->mode, 13);
+	if (snapshot)
+		buf[0] |= 0x80;
+	ret = send_video_command(pdev->udev, pdev->vendpoint, buf, 13);
+	if (ret < 0)
+		return ret;
+
+	if (pChoose->bandlength > 0)
+		ret = pdev->decompressor->init(pdev->release, buf, &pdev->decompress_data);
+	if (ret < 0)
+		return ret;
+	
+	/* Set various parameters */
+	pdev->vframes = frames;
+	pdev->vsize = size;
+	pdev->vsnapshot = snapshot;
+	pdev->valternate = pChoose->alternate;
+	pdev->image = pwc_image_sizes[size];
+	pdev->vbandlength = pChoose->bandlength;
+	if (pChoose->bandlength > 0) 
+		pdev->frame_size = (pChoose->bandlength * pdev->image.y) / 4;
+	else
+		pdev->frame_size = (pdev->image.x * pdev->image.y * 12) / 8;
+	return 0;
+}
+
+
+static inline int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames, int compression, int snapshot)
+{
+	struct Kiara_table_entry *pChoose;
+	int fps, ret;
+	unsigned char buf[12];
+	
+	if (size >= PSZ_MAX || frames < 5 || frames > 30 || compression < 0 || compression > 3)
+		return -EINVAL;
+	if (size == PSZ_VGA && frames > 15)
+		return -EINVAL;
+	fps = (frames / 5) - 1;
+	
+	/* Find a supported framerate with progressively higher compression ratios
+	   if the preferred ratio is not available.
+	*/
+	pChoose = NULL;
+	if (pdev->decompressor == NULL) {
+#if PWC_DEBUG	
+		Debug("Trying to find uncompressed mode.\n");
+#endif		
+		pChoose = &Kiara_table[size][fps][0];
+	}
+	else {
+		while (compression <= 3) {
+			pChoose = &Kiara_table[size][fps][compression];
+			if (pChoose->alternate != 0)
+				break;
+			compression++;	
+		}
+	}
+	if (pChoose == NULL || pChoose->alternate == 0)
+		return -ENOENT; /* Not supported. */
+
+	/* usb_control_msg won't take staticly allocated arrays as argument?? */
+	memcpy(buf, pChoose->mode, 12);
+	if (snapshot)
+		buf[0] |= 0x80;
+
+	/* Firmware bug: video endpoint is 5, but commands are sent to endpoint 4 */
+	ret = send_video_command(pdev->udev, 4 /* pdev->vendpoint */, buf, 12);
+	if (ret < 0)
+		return ret;
+
+	if (pChoose->bandlength > 0)
+		ret = pdev->decompressor->init(pdev->release, buf, &pdev->decompress_data);
+	if (ret < 0)
+		return ret;
+		
+	/* All set and go */
+	pdev->vframes = frames;
+	pdev->vsize = size;
+	pdev->vsnapshot = snapshot;
+	pdev->valternate = pChoose->alternate;
+	pdev->image = pwc_image_sizes[size];
+	pdev->vbandlength = pChoose->bandlength;
+	if (pChoose->bandlength > 0)
+		pdev->frame_size = (pChoose->bandlength * pdev->image.y) / 4;
+	else 
+		pdev->frame_size = (pdev->image.x * pdev->image.y * 12) / 8;
+	pdev->frame_size += (pdev->frame_header_size + pdev->frame_trailer_size);
+	return 0;
+}
+
+
+/**
+   @pdev: device structure
+   @width: viewport width
+   @height: viewport height
+   @frame: framerate, in fps
+   @compression: preferred compression ratio
+   @snapshot: snapshot mode or streaming
+ */
+int pwc_set_video_mode(struct pwc_device *pdev, int width, int height, int frames, int compression, int snapshot)
+{
+	int ret, size;
+	
+	size = pwc_decode_size(pdev, width, height);
+	if (size < 0) {
+		Debug("Could not find suitable size.\n");
+		return -ERANGE;
+	}
+	ret = -EINVAL;	
+	switch(pdev->type) {
+	case 645:
+	case 646:
+		ret = set_video_mode_Nala(pdev, size, frames);
+		break;
+
+	case 675:
+	case 680:
+	case 690:
+		ret = set_video_mode_Timon(pdev, size, frames, compression, snapshot);
+		break;
+		
+	case 730:
+	case 740:
+		ret = set_video_mode_Kiara(pdev, size, frames, compression, snapshot);
+		break;
+	}
+	if (ret < 0) {
+		if (ret == -ENOENT)
+			Info("Video mode %s@%d fps is only supported with the decompressor module (pwcx).\n", size2name[size], frames);
+		else {
+			Err("Failed to set video mode %s@%d fps; return code = %d\n", size2name[size], frames, ret);
+			return ret;
+		}
+	}
+	/* If the video mode was not supported, we still adjust the view size,
+	   since xawtv (Again! Stupid program...) doesn't care zit about 
+	   return values.
+	 */
+	pdev->view.x = width;
+	pdev->view.y = height;
+	pwc_set_image_buffer_size(pdev);
+	Trace(TRACE_SIZE, "Set viewport to %dx%d, image size is %dx%d. Palette = %d.\n", width, height, pwc_image_sizes[size].x, pwc_image_sizes[size].y, pdev->vpalette);
+	return 0;
+}
+
+
+void pwc_set_image_buffer_size(struct pwc_device *pdev)
+{
+	int factor, i, filler = 0;
+
+	switch(pdev->vpalette) {
+	case VIDEO_PALETTE_RGB32 | 0x80:
+	case VIDEO_PALETTE_RGB32:
+		factor = 16;
+		filler = 0;
+		break;
+	case VIDEO_PALETTE_RGB24 | 0x80:
+	case VIDEO_PALETTE_RGB24:
+		factor = 12;
+		filler = 0;
+		break;
+	case VIDEO_PALETTE_YUYV:
+	case VIDEO_PALETTE_YUV422:
+		factor = 8;
+		filler = 128;
+		break;
+	case VIDEO_PALETTE_YUV420:
+	case VIDEO_PALETTE_YUV420P:
+		factor = 6;
+		filler = 128;
+		break;
+#if PWC_DEBUG		
+	case VIDEO_PALETTE_RAW:
+		pdev->image.size = pdev->frame_size;
+		pdev->view.size = pdev->frame_size;
+		return;
+		break;
+#endif	
+	default:
+		factor = 0;
+		break;
+	}
+
+	/* Set sizes in bytes */
+	pdev->image.size = pdev->image.x * pdev->image.y * factor / 4;
+	pdev->view.size  = pdev->view.x  * pdev->view.y  * factor / 4;
+
+	pdev->offset.x = (pdev->view.x - pdev->image.x) / 2;
+	pdev->offset.y = (pdev->view.y - pdev->image.y) / 2;
+	if (pdev->vpalette == VIDEO_PALETTE_YUV420 || pdev->vpalette == VIDEO_PALETTE_YUV420P) {
+		/* Align offset, or you'll get some very weird results in
+		   YUV mode... x must be multiple of 4 (to get the Y's in 
+		   place), and y even (or you'll mixup U & V).
+		 */
+		pdev->offset.x &= 0xFFFC;
+		pdev->offset.y &= 0xFFFE;	
+		/* This is the offset in the Y area, hence no factor */
+		pdev->offset.size = (pdev->offset.y * pdev->view.x + pdev->offset.x);
+	}
+	else
+		pdev->offset.size = (pdev->offset.y * pdev->view.x + pdev->offset.x) * factor / 4;
+	
+	/* Set buffers to gray */
+	for (i = 0; i < MAX_IMAGES; i++) {
+		if (pdev->image_ptr[i] != NULL)
+			memset(pdev->image_ptr[i], filler, pdev->view.size);
+	}
+}
+
+
+#ifdef __KERNEL__
+/* BRIGHTNESS */
+
+int pwc_get_brightness(struct pwc_device *pdev)
+{
+	char buf;
+	int ret;
+	
+	ret = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
+		GET_LUM_CTL,
+		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		BRIGHTNESS_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+	if (ret < 0)
+		return ret;
+	return buf << 9;
+}
+
+int pwc_set_brightness(struct pwc_device *pdev, int value)
+{
+	char buf;
+
+	if (value < 0)
+		value = 0;
+	if (value > 0xffff)
+		value = 0xffff;
+	buf = (value >> 9) & 0x7f;
+	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_LUM_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		BRIGHTNESS_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+}
+
+/* CONTRAST */
+
+int pwc_get_contrast(struct pwc_device *pdev)
+{
+	char buf;
+	int ret;
+	
+	ret = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
+		GET_LUM_CTL,
+		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		CONTRAST_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+	if (ret < 0)
+		return ret;
+	return buf << 10;
+}
+
+int pwc_set_contrast(struct pwc_device *pdev, int value)
+{
+	char buf;
+
+	if (value < 0)
+		value = 0;
+	if (value > 0xffff)
+		value = 0xffff;
+	buf = (value >> 10) & 0x3f;
+	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_LUM_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		CONTRAST_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+}
+
+/* GAMMA */
+
+int pwc_get_gamma(struct pwc_device *pdev)
+{
+	char buf;
+	int ret;
+	
+	ret = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
+		GET_LUM_CTL,
+		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		GAMMA_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+	if (ret < 0)
+		return ret;
+	return buf << 11;
+}
+
+int pwc_set_gamma(struct pwc_device *pdev, int value)
+{
+	char buf;
+
+	if (value < 0)
+		value = 0;
+	if (value > 0xffff)
+		value = 0xffff;
+	buf = (value >> 11) & 0x1f;
+	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_LUM_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		GAMMA_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+}
+
+
+/* SATURATION */
+
+int pwc_get_saturation(struct pwc_device *pdev)
+{
+	char buf;
+	int ret;
+
+	if (pdev->type < 730)
+		return -1;
+	ret = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
+		GET_CHROM_CTL,
+		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		SATURATION_MODE_FORMATTER1,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+	if (ret < 0)
+		return ret;
+	return 32768 + buf * 327;
+}
+
+int pwc_set_saturation(struct pwc_device *pdev, int value)
+{
+	char buf;
+
+	if (pdev->type < 730)
+		return -EINVAL;
+	if (value < 0)
+		value = 0;
+	if (value > 0xffff)
+		value = 0xffff;
+	/* saturation ranges from -100 to +100 */
+	buf = (value - 32768) / 327;
+	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_CHROM_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		SATURATION_MODE_FORMATTER1,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+}
+
+/* AGC */
+
+static inline int pwc_set_agc(struct pwc_device *pdev, int mode, int value)
+{
+	char buf;
+	int ret;
+	
+	if (mode)
+		buf = 0x0; /* auto */
+	else
+		buf = 0xff; /* fixed */
+
+	ret = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_LUM_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		AGC_MODE_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+	
+	if (!mode && ret >= 0) {
+		if (value < 0)
+			value = 0;
+		if (value > 0xffff)
+			value = 0xffff;
+		buf = (value >> 10) & 0x3F;
+		ret = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+			SET_LUM_CTL,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			PRESET_AGC_FORMATTER,
+			pdev->vcinterface,
+			&buf, 1, HZ / 2);
+	}
+	if (ret < 0)
+		return ret;
+	return 0;
+}
+
+static inline int pwc_get_agc(struct pwc_device *pdev, int *value)
+{
+	unsigned char buf;
+	int ret;
+	
+	ret = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
+		GET_LUM_CTL,
+		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		AGC_MODE_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+	if (ret < 0)
+		return ret;
+
+	if (buf != 0) { /* fixed */
+		ret = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
+			GET_LUM_CTL,
+			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			PRESET_AGC_FORMATTER,
+			pdev->vcinterface,
+			&buf, 1, HZ / 2);
+		if (ret < 0)
+			return ret;
+		if (buf > 0x3F)
+			buf = 0x3F;
+		*value = (buf << 10);		
+	}
+	else { /* auto */
+		ret = usb_control_msg(pdev->udev, usb_rcvctrlpipe(pdev->udev, 0),
+			GET_STATUS_CTL,
+			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			READ_AGC_FORMATTER,
+			pdev->vcinterface,
+			&buf, 1, HZ / 2);
+		if (ret < 0)
+			return ret;
+		/* Gah... this value ranges from 0x00 ... 0x9F */
+		if (buf > 0x9F)
+			buf = 0x9F;
+		*value = -(48 + buf * 409);
+	}
+
+	return 0;
+}
+
+static inline int pwc_set_shutter_speed(struct pwc_device *pdev, int mode, int value)
+{
+	char buf[2];
+	int speed, ret;
+
+
+	if (mode)
+		buf[0] = 0x0;	/* auto */
+	else
+		buf[0] = 0xff; /* fixed */
+	
+	ret = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_LUM_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		SHUTTER_MODE_FORMATTER,
+		pdev->vcinterface,
+		buf, 1, HZ / 2);
+
+	if (!mode && ret >= 0) {
+		if (value < 0)
+			value = 0;
+		if (value > 0xffff)
+			value = 0xffff;
+		switch(pdev->type) {
+		case 675:
+		case 680:
+		case 690:
+			/* speed ranges from 0x0 to 0x290 (656) */
+			speed = (value / 100);
+			buf[1] = speed >> 8;
+			buf[0] = speed & 0xff;
+			break;
+		case 730:
+		case 740:
+			/* speed seems to range from 0x0 to 0xff */
+			buf[1] = 0;
+			buf[0] = value >> 8;
+			break;
+		}
+
+		ret = usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+			SET_LUM_CTL,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			PRESET_SHUTTER_FORMATTER,
+			pdev->vcinterface,
+			&buf, 2, HZ / 2);
+	}
+	return ret;
+}	
+
+
+/* POWER */
+
+int pwc_camera_power(struct pwc_device *pdev, int power)
+{
+	char buf;
+
+	if (pdev->type < 675 || pdev->release < 6)
+		return 0;	/* Not supported by Nala or Timon < release 6 */
+
+	if (power)
+		buf = 0x00; /* active */
+	else
+		buf = 0xFF; /* power save */
+	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_STATUS_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		SET_POWER_SAVE_MODE_FORMATTER,
+		pdev->vcinterface,
+		&buf, 1, HZ / 2);
+}
+
+
+
+/* private calls */
+
+static inline int pwc_restore_user(struct pwc_device *pdev)
+{
+	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_STATUS_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		RESTORE_USER_DEFAULTS_FORMATTER,
+		pdev->vcinterface,
+		NULL, 0, HZ / 2);
+}
+
+static inline int pwc_save_user(struct pwc_device *pdev)
+{
+	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_STATUS_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		SAVE_USER_DEFAULTS_FORMATTER,
+		pdev->vcinterface,
+		NULL, 0, HZ / 2);
+}
+
+static inline int pwc_restore_factory(struct pwc_device *pdev)
+{
+	return usb_control_msg(pdev->udev, usb_sndctrlpipe(pdev->udev, 0),
+		SET_STATUS_CTL,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		RESTORE_FACTORY_DEFAULTS_FORMATTER,
+		pdev->vcinterface,
+		NULL, 0, HZ / 2);
+}
+
+int pwc_ioctl(struct pwc_device *pdev, unsigned int cmd, void *arg)
+{
+	switch(cmd) {
+	case VIDIOCPWCRUSER:
+	{
+		if (pwc_restore_user(pdev))
+			return -EINVAL;
+		break;
+	}
+	
+	case VIDIOCPWCSUSER:
+	{
+		if (pwc_save_user(pdev))
+			return -EINVAL;
+		break;
+	}
+		
+	case VIDIOCPWCFACTORY:
+	{
+		if (pwc_restore_factory(pdev))
+			return -EINVAL;
+		break;
+	}
+	
+	case VIDIOCPWCSCQUAL:
+	{	
+		int qual, ret;
+
+		if (copy_from_user(&qual, arg, sizeof(int)))
+			return -EFAULT;
+			
+		if (qual < 0 || qual > 3)
+			return -EINVAL;
+		ret = pwc_try_video_mode(pdev, pdev->view.x, pdev->view.y, pdev->vframes, qual, pdev->vsnapshot);
+		if (ret < 0)
+			return ret;
+		pdev->vcompression = qual;
+		break;
+	}
+	
+	case VIDIOCPWCGCQUAL:
+	{
+		if (copy_to_user(arg, &pdev->vcompression, sizeof(int)))
+			return -EFAULT;
+		break;
+	}
+
+	case VIDIOCPWCSAGC:
+	{
+		int agc;
+		
+		if (copy_from_user(&agc, arg, sizeof(agc)))
+			return -EFAULT;	
+		else {
+			if (pwc_set_agc(pdev, agc < 0 ? 1 : 0, agc))
+				return -EINVAL;
+		}
+		break;
+	}
+	
+	case VIDIOCPWCGAGC:
+	{
+		int agc;
+		
+		if (pwc_get_agc(pdev, &agc))
+			return -EINVAL;
+		if (copy_to_user(arg, &agc, sizeof(agc)))
+			return -EFAULT;
+		break;
+	}
+	
+	case VIDIOCPWCSSHUTTER:
+	{
+		int shutter_speed, ret;
+
+		if (copy_from_user(&shutter_speed, arg, sizeof(shutter_speed)))
+			return -EFAULT;
+		else {
+			ret = pwc_set_shutter_speed(pdev, shutter_speed < 0 ? 1 : 0, shutter_speed);
+			if (ret < 0)
+				return ret;
+		}
+		break;
+	}
+	
+	default:
+		return -ENOIOCTLCMD;
+		break;
+	}
+	return 0;
+}
+
+#endif