V4L/DVB: gspca - spca1528: New subdriver

Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 617 insertions, 0 deletions

diff --git a/Documentation/video4linux/gspca.txt b/Documentation/video4linux/gspca.txt
index a258107f8126..58adb71c6294 100644
--- a/Documentation/video4linux/gspca.txt
+++ b/Documentation/video4linux/gspca.txt
@@ -142,6 +142,7 @@ finepix		04cb:013d	Fujifilm FinePix unknown model
 finepix		04cb:013f	Fujifilm FinePix F420
 sunplus		04f1:1001	JVC GC A50
 spca561		04fc:0561	Flexcam 100
+spca1528	04fc:1528	Sunplus MD80 clone
 sunplus		04fc:500c	Sunplus CA500C
 sunplus		04fc:504a	Aiptek Mini PenCam 1.3
 sunplus		04fc:504b	Maxell MaxPocket LE 1.3
diff --git a/drivers/media/video/gspca/Kconfig b/drivers/media/video/gspca/Kconfig
index f805d9772ba0..23db0c29f68c 100644
--- a/drivers/media/video/gspca/Kconfig
+++ b/drivers/media/video/gspca/Kconfig
@@ -246,6 +246,15 @@ config USB_GSPCA_SPCA561
 	  To compile this driver as a module, choose M here: the
 	  module will be called gspca_spca561.
 
+config USB_GSPCA_SPCA1528
+	tristate "SPCA1528 USB Camera Driver"
+	depends on VIDEO_V4L2 && USB_GSPCA
+	help
+	  Say Y here if you want support for cameras based on the SPCA1528 chip.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called gspca_spca1528.
+
 config USB_GSPCA_SQ905
 	tristate "SQ Technologies SQ905 based USB Camera Driver"
 	depends on VIDEO_V4L2 && USB_GSPCA
diff --git a/drivers/media/video/gspca/Makefile b/drivers/media/video/gspca/Makefile
index 0900c0e70473..f6616db0b7f8 100644
--- a/drivers/media/video/gspca/Makefile
+++ b/drivers/media/video/gspca/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_USB_GSPCA_SPCA505)  += gspca_spca505.o
 obj-$(CONFIG_USB_GSPCA_SPCA506)  += gspca_spca506.o
 obj-$(CONFIG_USB_GSPCA_SPCA508)  += gspca_spca508.o
 obj-$(CONFIG_USB_GSPCA_SPCA561)  += gspca_spca561.o
+obj-$(CONFIG_USB_GSPCA_SPCA1528) += gspca_spca1528.o
 obj-$(CONFIG_USB_GSPCA_SQ905)    += gspca_sq905.o
 obj-$(CONFIG_USB_GSPCA_SQ905C)   += gspca_sq905c.o
 obj-$(CONFIG_USB_GSPCA_SQ930X)   += gspca_sq930x.o
@@ -59,6 +60,7 @@ gspca_spca505-objs  := spca505.o
 gspca_spca506-objs  := spca506.o
 gspca_spca508-objs  := spca508.o
 gspca_spca561-objs  := spca561.o
+gspca_spca1528-objs := spca1528.o
 gspca_sq905-objs    := sq905.o
 gspca_sq905c-objs   := sq905c.o
 gspca_sq930x-objs   := sq930x.o
diff --git a/drivers/media/video/gspca/spca1528.c b/drivers/media/video/gspca/spca1528.c
new file mode 100644
index 000000000000..3f514eb1d99d
--- /dev/null
+++ b/drivers/media/video/gspca/spca1528.c
@@ -0,0 +1,605 @@
+/*
+ * spca1528 subdriver
+ *
+ * Copyright (C) 2010 Jean-Francois Moine (http://moinejf.free.fr)
+ *
+ * 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
+ * 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
+ */
+
+#define MODULE_NAME "spca1528"
+
+#include "gspca.h"
+#include "jpeg.h"
+
+MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
+MODULE_DESCRIPTION("SPCA1528 USB Camera Driver");
+MODULE_LICENSE("GPL");
+
+/* specific webcam descriptor */
+struct sd {
+	struct gspca_dev gspca_dev;	/* !! must be the first item */
+
+	u8 brightness;
+	u8 contrast;
+	u8 hue;
+	u8 color;
+	u8 sharpness;
+
+	u8 pkt_seq;
+
+	u8 jpeg_hdr[JPEG_HDR_SZ];
+};
+
+/* V4L2 controls supported by the driver */
+static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_sethue(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_gethue(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setcolor(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getcolor(struct gspca_dev *gspca_dev, __s32 *val);
+static int sd_setsharpness(struct gspca_dev *gspca_dev, __s32 val);
+static int sd_getsharpness(struct gspca_dev *gspca_dev, __s32 *val);
+
+static const struct ctrl sd_ctrls[] = {
+	{
+	    {
+		.id      = V4L2_CID_BRIGHTNESS,
+		.type    = V4L2_CTRL_TYPE_INTEGER,
+		.name    = "Brightness",
+		.minimum = 0,
+		.maximum = 255,
+		.step    = 1,
+#define BRIGHTNESS_DEF 128
+		.default_value = BRIGHTNESS_DEF,
+	    },
+	    .set = sd_setbrightness,
+	    .get = sd_getbrightness,
+	},
+	{
+	    {
+		.id      = V4L2_CID_CONTRAST,
+		.type    = V4L2_CTRL_TYPE_INTEGER,
+		.name    = "Contrast",
+		.minimum = 0,
+		.maximum = 8,
+		.step    = 1,
+#define CONTRAST_DEF 1
+		.default_value = CONTRAST_DEF,
+	    },
+	    .set = sd_setcontrast,
+	    .get = sd_getcontrast,
+	},
+	{
+	    {
+		.id      = V4L2_CID_HUE,
+		.type    = V4L2_CTRL_TYPE_INTEGER,
+		.name    = "Hue",
+		.minimum = 0,
+		.maximum = 255,
+		.step    = 1,
+#define HUE_DEF 0
+		.default_value = HUE_DEF,
+	    },
+	    .set = sd_sethue,
+	    .get = sd_gethue,
+	},
+	{
+	    {
+		.id      = V4L2_CID_SATURATION,
+		.type    = V4L2_CTRL_TYPE_INTEGER,
+		.name    = "Saturation",
+		.minimum = 0,
+		.maximum = 8,
+		.step    = 1,
+#define COLOR_DEF 1
+		.default_value = COLOR_DEF,
+	    },
+	    .set = sd_setcolor,
+	    .get = sd_getcolor,
+	},
+	{
+	    {
+		.id	 = V4L2_CID_SHARPNESS,
+		.type    = V4L2_CTRL_TYPE_INTEGER,
+		.name    = "Sharpness",
+		.minimum = 0,
+		.maximum = 255,
+		.step    = 1,
+#define SHARPNESS_DEF 0
+		.default_value = SHARPNESS_DEF,
+	    },
+	    .set = sd_setsharpness,
+	    .get = sd_getsharpness,
+	},
+};
+
+static const struct v4l2_pix_format vga_mode[] = {
+/*		(does not work correctly)
+	{176, 144, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
+		.bytesperline = 176,
+		.sizeimage = 176 * 144 * 5 / 8 + 590,
+		.colorspace = V4L2_COLORSPACE_JPEG,
+		.priv = 3},
+*/
+	{320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
+		.bytesperline = 320,
+		.sizeimage = 320 * 240 * 4 / 8 + 590,
+		.colorspace = V4L2_COLORSPACE_JPEG,
+		.priv = 2},
+	{640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE,
+		.bytesperline = 640,
+		.sizeimage = 640 * 480 * 3 / 8 + 590,
+		.colorspace = V4L2_COLORSPACE_JPEG,
+		.priv = 1},
+};
+
+/* read <len> bytes to gspca usb_buf */
+static void reg_r(struct gspca_dev *gspca_dev,
+			u8 req,
+			u16 index,
+			int len)
+{
+#if USB_BUF_SZ < 64
+#error "USB buffer too small"
+#endif
+	struct usb_device *dev = gspca_dev->dev;
+	int ret;
+
+	if (gspca_dev->usb_err < 0)
+		return;
+	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			req,
+			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			0x0000,			/* value */
+			index,
+			gspca_dev->usb_buf, len,
+			500);
+	PDEBUG(D_USBI, "GET %02x 0000 %04x %02x", req, index,
+			 gspca_dev->usb_buf[0]);
+	if (ret < 0) {
+		PDEBUG(D_ERR, "reg_r err %d", ret);
+		gspca_dev->usb_err = ret;
+	}
+}
+
+static void reg_w(struct gspca_dev *gspca_dev,
+			u8 req,
+			u16 value,
+			u16 index)
+{
+	struct usb_device *dev = gspca_dev->dev;
+	int ret;
+
+	if (gspca_dev->usb_err < 0)
+		return;
+	PDEBUG(D_USBO, "SET %02x %04x %04x", req, value, index);
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			req,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			value, index,
+			NULL, 0, 500);
+	if (ret < 0) {
+		PDEBUG(D_ERR, "reg_w err %d", ret);
+		gspca_dev->usb_err = ret;
+	}
+}
+
+static void reg_wb(struct gspca_dev *gspca_dev,
+			u8 req,
+			u16 value,
+			u16 index,
+			u8 byte)
+{
+	struct usb_device *dev = gspca_dev->dev;
+	int ret;
+
+	if (gspca_dev->usb_err < 0)
+		return;
+	PDEBUG(D_USBO, "SET %02x %04x %04x %02x", req, value, index, byte);
+	gspca_dev->usb_buf[0] = byte;
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+			req,
+			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			value, index,
+			gspca_dev->usb_buf, 1, 500);
+	if (ret < 0) {
+		PDEBUG(D_ERR, "reg_w err %d", ret);
+		gspca_dev->usb_err = ret;
+	}
+}
+
+static void wait_status_0(struct gspca_dev *gspca_dev)
+{
+	int i;
+
+	i = 20;
+	do {
+		reg_r(gspca_dev, 0x21, 0x0000, 1);
+		if (gspca_dev->usb_buf[0] == 0)
+			return;
+		msleep(30);
+	} while (--i > 0);
+	PDEBUG(D_ERR, "wait_status_0 timeout");
+	gspca_dev->usb_err = -ETIME;
+}
+
+static void wait_status_1(struct gspca_dev *gspca_dev)
+{
+	int i;
+
+	i = 10;
+	do {
+		reg_r(gspca_dev, 0x21, 0x0001, 1);
+		msleep(10);
+		if (gspca_dev->usb_buf[0] == 1) {
+			reg_wb(gspca_dev, 0x21, 0x0000, 0x0001, 0x00);
+			reg_r(gspca_dev, 0x21, 0x0001, 1);
+			return;
+		}
+	} while (--i > 0);
+	PDEBUG(D_ERR, "wait_status_1 timeout");
+	gspca_dev->usb_err = -ETIME;
+}
+
+static void setbrightness(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	reg_wb(gspca_dev, 0xc0, 0x0000, 0x00c0, sd->brightness);
+}
+
+static void setcontrast(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	reg_wb(gspca_dev, 0xc1, 0x0000, 0x00c1, sd->contrast);
+}
+
+static void sethue(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	reg_wb(gspca_dev, 0xc2, 0x0000, 0x0000, sd->hue);
+}
+
+static void setcolor(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	reg_wb(gspca_dev, 0xc3, 0x0000, 0x00c3, sd->color);
+}
+
+static void setsharpness(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	reg_wb(gspca_dev, 0xc4, 0x0000, 0x00c4, sd->sharpness);
+}
+
+/* this function is called at probe time */
+static int sd_config(struct gspca_dev *gspca_dev,
+			const struct usb_device_id *id)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	gspca_dev->cam.cam_mode = vga_mode;
+	gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode);
+	gspca_dev->cam.npkt = 128; /* number of packets per ISOC message */
+			/*fixme: 256 in ms-win traces*/
+
+	sd->brightness = BRIGHTNESS_DEF;
+	sd->contrast = CONTRAST_DEF;
+	sd->hue = HUE_DEF;
+	sd->color = COLOR_DEF;
+	sd->sharpness = SHARPNESS_DEF;
+
+	gspca_dev->nbalt = 4;		/* use alternate setting 3 */
+
+	return 0;
+}
+
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
+{
+	reg_w(gspca_dev, 0x00, 0x0001, 0x2067);
+	reg_w(gspca_dev, 0x00, 0x00d0, 0x206b);
+	reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
+	reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
+	msleep(8);
+	reg_w(gspca_dev, 0x00, 0x00c0, 0x206b);
+	reg_w(gspca_dev, 0x00, 0x0000, 0x206c);
+	reg_w(gspca_dev, 0x00, 0x0001, 0x2069);
+
+	reg_r(gspca_dev, 0x20, 0x0000, 1);
+	reg_r(gspca_dev, 0x20, 0x0000, 5);
+	reg_r(gspca_dev, 0x23, 0x0000, 64);
+	PDEBUG(D_PROBE, "%s%s", &gspca_dev->usb_buf[0x1c],
+				&gspca_dev->usb_buf[0x30]);
+	reg_r(gspca_dev, 0x23, 0x0001, 64);
+	return gspca_dev->usb_err;
+}
+
+/* function called at start time before URB creation */
+static int sd_isoc_init(struct gspca_dev *gspca_dev)
+{
+	u8 mode;
+
+	reg_r(gspca_dev, 0x00, 0x2520, 1);
+	wait_status_0(gspca_dev);
+	reg_w(gspca_dev, 0xc5, 0x0003, 0x0000);
+	wait_status_1(gspca_dev);
+
+	wait_status_0(gspca_dev);
+	mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv;
+	reg_wb(gspca_dev, 0x25, 0x0000, 0x0004, mode);
+	reg_r(gspca_dev, 0x25, 0x0004, 1);
+	reg_wb(gspca_dev, 0x27, 0x0000, 0x0000, 0x06);
+	reg_r(gspca_dev, 0x27, 0x0000, 1);
+	return gspca_dev->usb_err;
+}
+
+/* -- start the camera -- */
+static int sd_start(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	/* initialize the JPEG header */
+	jpeg_define(sd->jpeg_hdr, gspca_dev->height, gspca_dev->width,
+			0x22);		/* JPEG 411 */
+
+	/* the JPEG quality seems to be 82% */
+	jpeg_set_qual(sd->jpeg_hdr, 82);
+
+	/* set the controls */
+	setbrightness(gspca_dev);
+	setcontrast(gspca_dev);
+	sethue(gspca_dev);
+	setcolor(gspca_dev);
+	setsharpness(gspca_dev);
+
+	msleep(5);
+	reg_r(gspca_dev, 0x00, 0x2520, 1);
+	msleep(8);
+
+	/* start the capture */
+	wait_status_0(gspca_dev);
+	reg_w(gspca_dev, 0x31, 0x0000, 0x0004);
+	wait_status_1(gspca_dev);
+	wait_status_0(gspca_dev);
+	msleep(200);
+
+	sd->pkt_seq = 0;
+	return gspca_dev->usb_err;
+}
+
+static void sd_stopN(struct gspca_dev *gspca_dev)
+{
+	/* stop the capture */
+	wait_status_0(gspca_dev);
+	reg_w(gspca_dev, 0x31, 0x0000, 0x0000);
+	wait_status_1(gspca_dev);
+	wait_status_0(gspca_dev);
+}
+
+/* move a packet adding 0x00 after 0xff */
+static void add_packet(struct gspca_dev *gspca_dev,
+			u8 *data,
+			int len)
+{
+	int i;
+
+	i = 0;
+	do {
+		if (data[i] == 0xff) {
+			gspca_frame_add(gspca_dev, INTER_PACKET,
+					data, i + 1);
+			len -= i;
+			data += i;
+			*data = 0x00;
+			i = 0;
+		}
+	} while (++i < len);
+	gspca_frame_add(gspca_dev, INTER_PACKET, data, len);
+}
+
+static void sd_pkt_scan(struct gspca_dev *gspca_dev,
+			u8 *data,			/* isoc packet */
+			int len)			/* iso packet length */
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	static const u8 ffd9[] = {0xff, 0xd9};
+
+	/* image packets start with:
+	 *	02 8n
+	 * with <n> bit:
+	 *	0x01: even (0) / odd (1) image
+	 *	0x02: end of image when set
+	 */
+	if (len < 3)
+		return;				/* empty packet */
+	if (*data == 0x02) {
+		if (data[1] & 0x02) {
+			sd->pkt_seq = !(data[1] & 1);
+			add_packet(gspca_dev, data + 2, len - 2);
+			gspca_frame_add(gspca_dev, LAST_PACKET,
+					ffd9, 2);
+			return;
+		}
+		if ((data[1] & 1) != sd->pkt_seq)
+			goto err;
+		if (gspca_dev->last_packet_type == LAST_PACKET)
+			gspca_frame_add(gspca_dev, FIRST_PACKET,
+					sd->jpeg_hdr, JPEG_HDR_SZ);
+		add_packet(gspca_dev, data + 2, len - 2);
+		return;
+	}
+err:
+	gspca_dev->last_packet_type = DISCARD_PACKET;
+}
+
+static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	sd->brightness = val;
+	if (gspca_dev->streaming)
+		setbrightness(gspca_dev);
+	return gspca_dev->usb_err;
+}
+
+static int sd_getbrightness(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	*val = sd->brightness;
+	return 0;
+}
+
+static int sd_setcontrast(struct gspca_dev *gspca_dev, __s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	sd->contrast = val;
+	if (gspca_dev->streaming)
+		setcontrast(gspca_dev);
+	return gspca_dev->usb_err;
+}
+
+static int sd_getcontrast(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	*val = sd->contrast;
+	return 0;
+}
+
+static int sd_sethue(struct gspca_dev *gspca_dev, __s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	sd->hue = val;
+	if (gspca_dev->streaming)
+		sethue(gspca_dev);
+	return gspca_dev->usb_err;
+}
+
+static int sd_gethue(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	*val = sd->hue;
+	return 0;
+}
+
+static int sd_setcolor(struct gspca_dev *gspca_dev, __s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	sd->color = val;
+	if (gspca_dev->streaming)
+		setcolor(gspca_dev);
+	return gspca_dev->usb_err;
+}
+
+static int sd_getcolor(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	*val = sd->color;
+	return 0;
+}
+
+static int sd_setsharpness(struct gspca_dev *gspca_dev, __s32 val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	sd->sharpness = val;
+	if (gspca_dev->streaming)
+		setsharpness(gspca_dev);
+	return gspca_dev->usb_err;
+}
+
+static int sd_getsharpness(struct gspca_dev *gspca_dev, __s32 *val)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	*val = sd->sharpness;
+	return 0;
+}
+
+/* sub-driver description */
+static const struct sd_desc sd_desc = {
+	.name = MODULE_NAME,
+	.ctrls = sd_ctrls,
+	.nctrls = ARRAY_SIZE(sd_ctrls),
+	.config = sd_config,
+	.init = sd_init,
+	.isoc_init = sd_isoc_init,
+	.start = sd_start,
+	.stopN = sd_stopN,
+	.pkt_scan = sd_pkt_scan,
+};
+
+/* -- module initialisation -- */
+static const __devinitdata struct usb_device_id device_table[] = {
+	{USB_DEVICE(0x04fc, 0x1528)},
+	{}
+};
+MODULE_DEVICE_TABLE(usb, device_table);
+
+/* -- device connect -- */
+static int sd_probe(struct usb_interface *intf,
+			const struct usb_device_id *id)
+{
+	/* the video interface for isochronous transfer is 1 */
+	if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
+		return -ENODEV;
+
+	return gspca_dev_probe2(intf, id, &sd_desc, sizeof(struct sd),
+				THIS_MODULE);
+}
+
+static struct usb_driver sd_driver = {
+	.name = MODULE_NAME,
+	.id_table = device_table,
+	.probe = sd_probe,
+	.disconnect = gspca_disconnect,
+#ifdef CONFIG_PM
+	.suspend = gspca_suspend,
+	.resume = gspca_resume,
+#endif
+};
+
+/* -- module insert / remove -- */
+static int __init sd_mod_init(void)
+{
+	int ret;
+
+	ret = usb_register(&sd_driver);
+	if (ret < 0)
+		return ret;
+	info("registered");
+	return 0;
+}
+static void __exit sd_mod_exit(void)
+{
+	usb_deregister(&sd_driver);
+	info("deregistered");
+}
+
+module_init(sd_mod_init);
+module_exit(sd_mod_exit);