1 files changed, 309 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/m5602/m5602_core.c b/drivers/media/video/gspca/m5602/m5602_core.c
new file mode 100644
index 000000000000..fd6ce384b487
--- /dev/null
+++ b/drivers/media/video/gspca/m5602/m5602_core.c
@@ -0,0 +1,309 @@
+ /*
+ * USB Driver for ALi m5602 based webcams
+ *
+ * Copyright (C) 2008 Erik Andrén
+ * Copyright (C) 2007 Ilyes Gouta. Based on the m5603x Linux Driver Project.
+ * Copyright (C) 2005 m5603x Linux Driver Project <m5602@x3ng.com.br>
+ *
+ * Portions of code to USB interface and ALi driver software,
+ * Copyright (c) 2006 Willem Duinker
+ * v4l2 interface modeled after the V4L2 driver
+ * for SN9C10x PC Camera Controllers
+ *
+ * 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, version 2.
+ *
+ */
+
+#include "m5602_ov9650.h"
+#include "m5602_mt9m111.h"
+#include "m5602_po1030.h"
+#include "m5602_s5k83a.h"
+#include "m5602_s5k4aa.h"
+
+/* Kernel module parameters */
+int force_sensor;
+int dump_bridge;
+int dump_sensor;
+
+static const __devinitdata struct usb_device_id m5602_table[] = {
+	{USB_DEVICE(0x0402, 0x5602)},
+	{}
+};
+
+MODULE_DEVICE_TABLE(usb, m5602_table);
+
+/* Reads a byte from the m5602 */
+int m5602_read_bridge(struct sd *sd, u8 address, u8 *i2c_data)
+{
+	int err;
+	struct usb_device *udev = sd->gspca_dev.dev;
+	__u8 *buf = sd->gspca_dev.usb_buf;
+
+	err = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+			      0x04, 0xc0, 0x14,
+			      0x8100 + address, buf,
+			      1, M5602_URB_MSG_TIMEOUT);
+	*i2c_data = buf[0];
+
+	PDEBUG(D_CONF, "Reading bridge register 0x%x containing 0x%x",
+	       address, *i2c_data);
+
+	/* usb_control_msg(...) returns the number of bytes sent upon success,
+	mask that and return zero upon success instead*/
+	return (err < 0) ? err : 0;
+}
+
+/* Writes a byte to to the m5602 */
+int m5602_write_bridge(struct sd *sd, u8 address, u8 i2c_data)
+{
+	int err;
+	struct usb_device *udev = sd->gspca_dev.dev;
+	__u8 *buf = sd->gspca_dev.usb_buf;
+
+	PDEBUG(D_CONF, "Writing bridge register 0x%x with 0x%x",
+	       address, i2c_data);
+
+	memcpy(buf, bridge_urb_skeleton,
+	       sizeof(bridge_urb_skeleton));
+	buf[1] = address;
+	buf[3] = i2c_data;
+
+	err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+				0x04, 0x40, 0x19,
+				0x0000, buf,
+				4, M5602_URB_MSG_TIMEOUT);
+
+	/* usb_control_msg(...) returns the number of bytes sent upon success,
+	   mask that and return zero upon success instead */
+	return (err < 0) ? err : 0;
+}
+
+/* Dump all the registers of the m5602 bridge,
+   unfortunately this breaks the camera until it's power cycled */
+static void m5602_dump_bridge(struct sd *sd)
+{
+	int i;
+	for (i = 0; i < 0x80; i++) {
+		unsigned char val = 0;
+		m5602_read_bridge(sd, i, &val);
+		info("ALi m5602 address 0x%x contains 0x%x", i, val);
+	}
+	info("Warning: The ALi m5602 webcam probably won't work "
+		"until it's power cycled");
+}
+
+static int m5602_probe_sensor(struct sd *sd)
+{
+	/* Try the po1030 */
+	sd->sensor = &po1030;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	/* Try the mt9m111 sensor */
+	sd->sensor = &mt9m111;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	/* Try the s5k4aa */
+	sd->sensor = &s5k4aa;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	/* Try the ov9650 */
+	sd->sensor = &ov9650;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	/* Try the s5k83a */
+	sd->sensor = &s5k83a;
+	if (!sd->sensor->probe(sd))
+		return 0;
+
+	/* More sensor probe function goes here */
+	info("Failed to find a sensor");
+	sd->sensor = NULL;
+	return -ENODEV;
+}
+
+static int m5602_configure(struct gspca_dev *gspca_dev,
+			   const struct usb_device_id *id);
+
+static int m5602_init(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	int err;
+
+	PDEBUG(D_CONF, "Initializing ALi m5602 webcam");
+	/* Run the init sequence */
+	err = sd->sensor->init(sd);
+
+	return err;
+}
+
+static int m5602_start_transfer(struct gspca_dev *gspca_dev)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	__u8 *buf = sd->gspca_dev.usb_buf;
+	int err;
+
+	/* Send start command to the camera */
+	const u8 buffer[4] = {0x13, 0xf9, 0x0f, 0x01};
+	memcpy(buf, buffer, sizeof(buffer));
+	err = usb_control_msg(gspca_dev->dev,
+			      usb_sndctrlpipe(gspca_dev->dev, 0),
+			      0x04, 0x40, 0x19, 0x0000, buf,
+			      4, M5602_URB_MSG_TIMEOUT);
+
+	PDEBUG(D_STREAM, "Transfer started");
+	return (err < 0) ? err : 0;
+}
+
+static void m5602_urb_complete(struct gspca_dev *gspca_dev,
+			struct gspca_frame *frame,
+			__u8 *data, int len)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	if (len < 6) {
+		PDEBUG(D_PACK, "Packet is less than 6 bytes");
+		return;
+	}
+
+	/* Frame delimiter: ff xx xx xx ff ff */
+	if (data[0] == 0xff && data[4] == 0xff && data[5] == 0xff &&
+	    data[2] != sd->frame_id) {
+		PDEBUG(D_FRAM, "Frame delimiter detected");
+		sd->frame_id = data[2];
+
+		/* Remove the extra fluff appended on each header */
+		data += 6;
+		len -= 6;
+
+		/* Complete the last frame (if any) */
+		frame = gspca_frame_add(gspca_dev, LAST_PACKET,
+					frame, data, 0);
+		sd->frame_count++;
+
+		/* Create a new frame */
+		gspca_frame_add(gspca_dev, FIRST_PACKET, frame, data, len);
+
+		PDEBUG(D_FRAM, "Starting new frame %d",
+		       sd->frame_count);
+
+	} else {
+		int cur_frame_len = frame->data_end - frame->data;
+
+		/* Remove urb header */
+		data += 4;
+		len -= 4;
+
+		if (cur_frame_len + len <= frame->v4l2_buf.length) {
+			PDEBUG(D_FRAM, "Continuing frame %d copying %d bytes",
+			       sd->frame_count, len);
+
+			gspca_frame_add(gspca_dev, INTER_PACKET, frame,
+					data, len);
+		} else if (frame->v4l2_buf.length - cur_frame_len > 0) {
+			/* Add the remaining data up to frame size */
+			gspca_frame_add(gspca_dev, INTER_PACKET, frame, data,
+					frame->v4l2_buf.length - cur_frame_len);
+		}
+	}
+}
+
+static void m5602_stop_transfer(struct gspca_dev *gspca_dev)
+{
+	/* Is there are a command to stop a data transfer? */
+}
+
+/* sub-driver description, the ctrl and nctrl is filled at probe time */
+static struct sd_desc sd_desc = {
+	.name		= MODULE_NAME,
+	.config		= m5602_configure,
+	.init		= m5602_init,
+	.start		= m5602_start_transfer,
+	.stopN		= m5602_stop_transfer,
+	.pkt_scan	= m5602_urb_complete
+};
+
+/* this function is called at probe time */
+static int m5602_configure(struct gspca_dev *gspca_dev,
+			   const struct usb_device_id *id)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+	struct cam *cam;
+	int err;
+
+	cam = &gspca_dev->cam;
+	cam->epaddr = M5602_ISOC_ENDPOINT_ADDR;
+	sd->desc = &sd_desc;
+
+	if (dump_bridge)
+		m5602_dump_bridge(sd);
+
+	/* Probe sensor */
+	err = m5602_probe_sensor(sd);
+	if (err)
+		goto fail;
+
+	return 0;
+
+fail:
+	PDEBUG(D_ERR, "ALi m5602 webcam failed");
+	cam->cam_mode = NULL;
+	cam->nmodes = 0;
+
+	return err;
+}
+
+static int m5602_probe(struct usb_interface *intf,
+		       const struct usb_device_id *id)
+{
+	return gspca_dev_probe(intf, id, &sd_desc, sizeof(struct sd),
+			       THIS_MODULE);
+}
+
+static struct usb_driver sd_driver = {
+	.name = MODULE_NAME,
+	.id_table = m5602_table,
+	.probe = m5602_probe,
+#ifdef CONFIG_PM
+	.suspend = gspca_suspend,
+	.resume = gspca_resume,
+#endif
+	.disconnect = gspca_disconnect
+};
+
+/* -- module insert / remove -- */
+static int __init mod_m5602_init(void)
+{
+	if (usb_register(&sd_driver) < 0)
+		return -1;
+	PDEBUG(D_PROBE, "registered");
+	return 0;
+}
+static void __exit mod_m5602_exit(void)
+{
+	usb_deregister(&sd_driver);
+	PDEBUG(D_PROBE, "deregistered");
+}
+
+module_init(mod_m5602_init);
+module_exit(mod_m5602_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+module_param(force_sensor, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(force_sensor,
+		"force detection of sensor, "
+		"1 = OV9650, 2 = S5K83A, 3 = S5K4AA, 4 = MT9M111, 5 = PO1030");
+
+module_param(dump_bridge, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dump_bridge, "Dumps all usb bridge registers at startup");
+
+module_param(dump_sensor, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dump_sensor, "Dumps all usb sensor registers "
+		"at startup providing a sensor is found");