Commit 43f52bf2 authored by Hans de Goede's avatar Hans de Goede Committed by Mauro Carvalho Chehab
Browse files

[media] gspca_pac7311: Convert to the control framework 



Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 2421b3dd

drivers/media/video/gspca/pac7311.c

+108 −126
Original line number Diff line number Diff line
@@ -64,25 +64,21 @@ 
/* Include pac common sof detection functions */

#include "pac_common.h"



#define PAC7311_GAIN_DEFAULT     122

#define PAC7311_EXPOSURE_DEFAULT   3 /* 20 fps, avoid using high compr. */



MODULE_AUTHOR("Thomas Kaiser thomas@kaiser-linux.li");

MODULE_DESCRIPTION("Pixart PAC7311");

MODULE_LICENSE("GPL");



enum e_ctrl {

	CONTRAST,

	GAIN,

	EXPOSURE,

	AUTOGAIN,

	HFLIP,

	VFLIP,

	NCTRLS		/* number of controls */

};



struct sd {

	struct gspca_dev gspca_dev;		/* !! must be the first item */

	struct gspca_ctrl ctrls[NCTRLS];

	int exp_too_low_cnt;

	int exp_too_high_cnt;



	struct v4l2_ctrl *contrast;

	struct { /* flip cluster */

		struct v4l2_ctrl *hflip;

		struct v4l2_ctrl *vflip;

	};



	u8 sof_read;

	u8 autogain_ignore_frames;
@@ -90,86 +86,6 @@ struct sd { 
	atomic_t avg_lum;

};



/* V4L2 controls supported by the driver */

static void setcontrast(struct gspca_dev *gspca_dev);

static void setgain(struct gspca_dev *gspca_dev);

static void setexposure(struct gspca_dev *gspca_dev);

static void sethvflip(struct gspca_dev *gspca_dev);



static const struct ctrl sd_ctrls[] = {

[CONTRAST] = {

	    {

		.id      = V4L2_CID_CONTRAST,

		.type    = V4L2_CTRL_TYPE_INTEGER,

		.name    = "Contrast",

		.minimum = 0,

		.maximum = 15,

		.step    = 1,

		.default_value = 7,

	    },

	    .set_control = setcontrast

	},

[GAIN] = {

	    {

		.id      = V4L2_CID_GAIN,

		.type    = V4L2_CTRL_TYPE_INTEGER,

		.name    = "Gain",

		.minimum = 0,

		.maximum = 244,

		.step    = 1,

		.default_value = 122,

	    },

	    .set_control = setgain,

	},

[EXPOSURE] = {

	    {

		.id      = V4L2_CID_EXPOSURE,

		.type    = V4L2_CTRL_TYPE_INTEGER,

		.name    = "Exposure",

		.minimum = 2,

		.maximum = 63,

		.step    = 1,

		.default_value = 3, /* 20 fps, avoid using high compr. */

	    },

	    .set_control = setexposure,

	},

[AUTOGAIN] = {

	    {

		.id      = V4L2_CID_AUTOGAIN,

		.type    = V4L2_CTRL_TYPE_BOOLEAN,

		.name    = "Auto Gain",

		.minimum = 0,

		.maximum = 1,

		.step    = 1,

		.default_value = 1,

	    },

	},

[HFLIP] = {

	    {

		.id      = V4L2_CID_HFLIP,

		.type    = V4L2_CTRL_TYPE_BOOLEAN,

		.name    = "Mirror",

		.minimum = 0,

		.maximum = 1,

		.step    = 1,

		.default_value = 0,

	    },

	    .set_control = sethvflip,

	},

[VFLIP] = {

	    {

		.id      = V4L2_CID_VFLIP,

		.type    = V4L2_CTRL_TYPE_BOOLEAN,

		.name    = "Vflip",

		.minimum = 0,

		.maximum = 1,

		.step    = 1,

		.default_value = 0,

	    },

	    .set_control = sethvflip,

	},

};



static const struct v4l2_pix_format vga_mode[] = {

	{160, 120, V4L2_PIX_FMT_PJPG, V4L2_FIELD_NONE,

		.bytesperline = 160,
@@ -371,45 +287,36 @@ static void reg_w_var(struct gspca_dev *gspca_dev, 
static int sd_config(struct gspca_dev *gspca_dev,

			const struct usb_device_id *id)

{

	struct sd *sd = (struct sd *) gspca_dev;

	struct cam *cam = &gspca_dev->cam;



	cam->cam_mode = vga_mode;

	cam->nmodes = ARRAY_SIZE(vga_mode);



	gspca_dev->cam.ctrls = sd->ctrls;



	return 0;

}



static void setcontrast(struct gspca_dev *gspca_dev)

static void setcontrast(struct gspca_dev *gspca_dev, s32 val)

{

	struct sd *sd = (struct sd *) gspca_dev;



	reg_w(gspca_dev, 0xff, 0x04);

	reg_w(gspca_dev, 0x10, sd->ctrls[CONTRAST].val);

	reg_w(gspca_dev, 0x10, val);

	/* load registers to sensor (Bit 0, auto clear) */

	reg_w(gspca_dev, 0x11, 0x01);

}



static void setgain(struct gspca_dev *gspca_dev)

static void setgain(struct gspca_dev *gspca_dev, s32 val)

{

	struct sd *sd = (struct sd *) gspca_dev;



	reg_w(gspca_dev, 0xff, 0x04);			/* page 4 */

	reg_w(gspca_dev, 0x0e, 0x00);

	reg_w(gspca_dev, 0x0f, sd->ctrls[GAIN].max - sd->ctrls[GAIN].val + 1);

	reg_w(gspca_dev, 0x0f, gspca_dev->gain->maximum - val + 1);



	/* load registers to sensor (Bit 0, auto clear) */

	reg_w(gspca_dev, 0x11, 0x01);

}



static void setexposure(struct gspca_dev *gspca_dev)

static void setexposure(struct gspca_dev *gspca_dev, s32 val)

{

	struct sd *sd = (struct sd *) gspca_dev;



	reg_w(gspca_dev, 0xff, 0x04);			/* page 4 */

	reg_w(gspca_dev, 0x02, sd->ctrls[EXPOSURE].val);

	reg_w(gspca_dev, 0x02, val);



	/* load registers to sensor (Bit 0, auto clear) */

	reg_w(gspca_dev, 0x11, 0x01);
@@ -419,7 +326,7 @@ static void setexposure(struct gspca_dev *gspca_dev) 
	 *  640x480 mode and page 4 reg 2 <= 3 then it must be 9

	 */

	reg_w(gspca_dev, 0xff, 0x01);

	if (gspca_dev->width != 640 && sd->ctrls[EXPOSURE].val <= 3)

	if (gspca_dev->width != 640 && val <= 3)

		reg_w(gspca_dev, 0x08, 0x09);

	else

		reg_w(gspca_dev, 0x08, 0x08);
@@ -430,7 +337,7 @@ static void setexposure(struct gspca_dev *gspca_dev) 
	 * camera to use higher compression or we may run out of

	 * bandwidth.

	 */

	if (gspca_dev->width == 640 && sd->ctrls[EXPOSURE].val == 2)

	if (gspca_dev->width == 640 && val == 2)

		reg_w(gspca_dev, 0x80, 0x01);

	else

		reg_w(gspca_dev, 0x80, 0x1c);
@@ -439,14 +346,13 @@ static void setexposure(struct gspca_dev *gspca_dev) 
	reg_w(gspca_dev, 0x11, 0x01);

}



static void sethvflip(struct gspca_dev *gspca_dev)

static void sethvflip(struct gspca_dev *gspca_dev, s32 hflip, s32 vflip)

{

	struct sd *sd = (struct sd *) gspca_dev;

	__u8 data;



	reg_w(gspca_dev, 0xff, 0x04);			/* page 4 */

	data = (sd->ctrls[HFLIP].val ? 0x04 : 0x00) |

	       (sd->ctrls[VFLIP].val ? 0x08 : 0x00);

	data = (hflip ? 0x04 : 0x00) |

	       (vflip ? 0x08 : 0x00);

	reg_w(gspca_dev, 0x21, data);



	/* load registers to sensor (Bit 0, auto clear) */
@@ -460,6 +366,85 @@ static int sd_init(struct gspca_dev *gspca_dev) 
	return gspca_dev->usb_err;

}



static int sd_s_ctrl(struct v4l2_ctrl *ctrl)

{

	struct gspca_dev *gspca_dev =

		container_of(ctrl->handler, struct gspca_dev, ctrl_handler);

	struct sd *sd = (struct sd *)gspca_dev;



	gspca_dev->usb_err = 0;



	if (ctrl->id == V4L2_CID_AUTOGAIN && ctrl->is_new && ctrl->val) {

		/* when switching to autogain set defaults to make sure

		   we are on a valid point of the autogain gain /

		   exposure knee graph, and give this change time to

		   take effect before doing autogain. */

		gspca_dev->exposure->val    = PAC7311_EXPOSURE_DEFAULT;

		gspca_dev->gain->val        = PAC7311_GAIN_DEFAULT;

		sd->autogain_ignore_frames  = PAC_AUTOGAIN_IGNORE_FRAMES;

	}



	if (!gspca_dev->streaming)

		return 0;



	switch (ctrl->id) {

	case V4L2_CID_CONTRAST:

		setcontrast(gspca_dev, ctrl->val);

		break;

	case V4L2_CID_AUTOGAIN:

		if (gspca_dev->exposure->is_new || (ctrl->is_new && ctrl->val))

			setexposure(gspca_dev, gspca_dev->exposure->val);

		if (gspca_dev->gain->is_new || (ctrl->is_new && ctrl->val))

			setgain(gspca_dev, gspca_dev->gain->val);

		break;

	case V4L2_CID_HFLIP:

		sethvflip(gspca_dev, sd->hflip->val, sd->vflip->val);

		break;

	default:

		return -EINVAL;

	}

	return gspca_dev->usb_err;

}



static const struct v4l2_ctrl_ops sd_ctrl_ops = {

	.s_ctrl = sd_s_ctrl,

};



/* this function is called at probe time */

static int sd_init_controls(struct gspca_dev *gspca_dev)

{

	struct sd *sd = (struct sd *) gspca_dev;

	struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler;



	gspca_dev->vdev.ctrl_handler = hdl;

	v4l2_ctrl_handler_init(hdl, 4);



	sd->contrast = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,

					V4L2_CID_CONTRAST, 0, 15, 1, 7);

	gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,

					V4L2_CID_AUTOGAIN, 0, 1, 1, 1);

	gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,

					V4L2_CID_EXPOSURE, 2, 63, 1,

					PAC7311_EXPOSURE_DEFAULT);

	gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,

					V4L2_CID_GAIN, 0, 244, 1,

					PAC7311_GAIN_DEFAULT);

	sd->hflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,

		V4L2_CID_HFLIP, 0, 1, 1, 0);

	sd->vflip = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops,

		V4L2_CID_VFLIP, 0, 1, 1, 0);



	if (hdl->error) {

		pr_err("Could not initialize controls\n");

		return hdl->error;

	}



	v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false);

	v4l2_ctrl_cluster(2, &sd->hflip);

	return 0;

}



/* -- start the camera -- */

static int sd_start(struct gspca_dev *gspca_dev)

{

	struct sd *sd = (struct sd *) gspca_dev;
@@ -468,10 +453,11 @@ static int sd_start(struct gspca_dev *gspca_dev) 


	reg_w_var(gspca_dev, start_7311,

		page4_7311, sizeof(page4_7311));

	setcontrast(gspca_dev);

	setgain(gspca_dev);

	setexposure(gspca_dev);

	sethvflip(gspca_dev);

	setcontrast(gspca_dev, v4l2_ctrl_g_ctrl(sd->contrast));

	setgain(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->gain));

	setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure));

	sethvflip(gspca_dev, v4l2_ctrl_g_ctrl(sd->hflip),

			     v4l2_ctrl_g_ctrl(sd->vflip));



	/* set correct resolution */

	switch (gspca_dev->cam.cam_mode[(int) gspca_dev->curr_mode].priv) {
@@ -517,16 +503,13 @@ static void sd_stopN(struct gspca_dev *gspca_dev) 
	reg_w(gspca_dev, 0x78, 0x44); /* Bit_0=start stream, Bit_6=LED */

}



#define WANT_COARSE_EXPO_AUTOGAIN

#include "autogain_functions.h"



static void do_autogain(struct gspca_dev *gspca_dev)

{

	struct sd *sd = (struct sd *) gspca_dev;

	int avg_lum = atomic_read(&sd->avg_lum);

	int desired_lum, deadzone;



	if (sd->ctrls[AUTOGAIN].val == 0 || avg_lum == -1)

	if (avg_lum == -1)

		return;



	desired_lum = 200;
@@ -534,8 +517,8 @@ static void do_autogain(struct gspca_dev *gspca_dev) 


	if (sd->autogain_ignore_frames > 0)

		sd->autogain_ignore_frames--;

	else if (coarse_grained_expo_autogain(gspca_dev, avg_lum, desired_lum,

			deadzone))

	else if (gspca_coarse_grained_expo_autogain(gspca_dev, avg_lum,

						    desired_lum, deadzone))

		sd->autogain_ignore_frames = PAC_AUTOGAIN_IGNORE_FRAMES;

}
@@ -674,10 +657,9 @@ static int sd_int_pkt_scan(struct gspca_dev *gspca_dev, 


static const struct sd_desc sd_desc = {

	.name = MODULE_NAME,

	.ctrls = sd_ctrls,

	.nctrls = ARRAY_SIZE(sd_ctrls),

	.config = sd_config,

	.init = sd_init,

	.init_controls = sd_init_controls,

	.start = sd_start,

	.stopN = sd_stopN,

	.pkt_scan = sd_pkt_scan,

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