1 files changed, 265 insertions, 0 deletions
diff --git a/drivers/media/video/bt8xx/bt832.c b/drivers/media/video/bt8xx/bt832.c
new file mode 100644
index 00000000000..a5187613788
--- /dev/null
+++ b/drivers/media/video/bt8xx/bt832.c
@@ -0,0 +1,265 @@
+/* Driver for Bt832 CMOS Camera Video Processor
+    i2c-addresses: 0x88 or 0x8a
+
+  The BT832 interfaces to a Quartzsight Digital Camera (352x288, 25 or 30 fps)
+  via a 9 pin connector ( 4-wire SDATA, 2-wire i2c, SCLK, VCC, GND).
+  It outputs an 8-bit 4:2:2 YUV or YCrCb video signal which can be directly
+  connected to bt848/bt878 GPIO pins on this purpose.
+  (see: VLSI Vision Ltd. www.vvl.co.uk for camera datasheets)
+
+  Supported Cards:
+  -  Pixelview Rev.4E: 0x8a
+		GPIO 0x400000 toggles Bt832 RESET, and the chip changes to i2c 0x88 !
+
+  (c) Gunther Mayer, 2002
+
+  STATUS:
+  - detect chip and hexdump
+  - reset chip and leave low power mode
+  - detect camera present
+
+  TODO:
+  - make it work (find correct setup for Bt832 and Bt878)
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/types.h>
+#include <linux/videodev.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <media/v4l2-common.h>
+
+#include "bttv.h"
+#include "bt832.h"
+
+MODULE_LICENSE("GPL");
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { I2C_ADDR_BT832_ALT1>>1, I2C_ADDR_BT832_ALT2>>1,
+				       I2C_CLIENT_END };
+I2C_CLIENT_INSMOD;
+
+int debug;    /* debug output */
+module_param(debug,            int, 0644);
+
+/* ---------------------------------------------------------------------- */
+
+static int bt832_detach(struct i2c_client *client);
+
+
+static struct i2c_driver driver;
+static struct i2c_client client_template;
+
+struct bt832 {
+	struct i2c_client client;
+};
+
+int bt832_hexdump(struct i2c_client *i2c_client_s, unsigned char *buf)
+{
+	int i,rc;
+	buf[0]=0x80; // start at register 0 with auto-increment
+	if (1 != (rc = i2c_master_send(i2c_client_s,buf,1)))
+		v4l_err(i2c_client_s,"i2c i/o error: rc == %d (should be 1)\n",rc);
+
+	for(i=0;i<65;i++)
+		buf[i]=0;
+	if (65 != (rc=i2c_master_recv(i2c_client_s,buf,65)))
+		v4l_err(i2c_client_s,"i2c i/o error: rc == %d (should be 65)\n",rc);
+
+	// Note: On READ the first byte is the current index
+	//  (e.g. 0x80, what we just wrote)
+
+	if(debug>1) {
+		int i;
+		v4l_dbg(2, debug,i2c_client_s,"hexdump:");
+		for(i=1;i<65;i++) {
+			if(i!=1) {
+				if(((i-1)%8)==0) printk(" ");
+				if(((i-1)%16)==0) {
+					printk("\n");
+					v4l_dbg(2, debug,i2c_client_s,"hexdump:");
+				}
+			}
+			printk(" %02x",buf[i]);
+		}
+		printk("\n");
+	}
+	return 0;
+}
+
+// Return: 1 (is a bt832), 0 (No bt832 here)
+int bt832_init(struct i2c_client *i2c_client_s)
+{
+	unsigned char *buf;
+	int rc;
+
+	buf=kmalloc(65,GFP_KERNEL);
+	bt832_hexdump(i2c_client_s,buf);
+
+	if(buf[0x40] != 0x31) {
+		v4l_err(i2c_client_s,"This i2c chip is no bt832 (id=%02x). Detaching.\n",buf[0x40]);
+		kfree(buf);
+		return 0;
+	}
+
+	v4l_err(i2c_client_s,"Write 0 tp VPSTATUS\n");
+	buf[0]=BT832_VP_STATUS; // Reg.52
+	buf[1]= 0x00;
+	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
+		v4l_err(i2c_client_s,"i2c i/o error VPS: rc == %d (should be 2)\n",rc);
+
+	bt832_hexdump(i2c_client_s,buf);
+
+
+	// Leave low power mode:
+	v4l_err(i2c_client_s,"leave low power mode.\n");
+	buf[0]=BT832_CAM_SETUP0; //0x39 57
+	buf[1]=0x08;
+	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
+		v4l_err(i2c_client_s,"i2c i/o error LLPM: rc == %d (should be 2)\n",rc);
+
+	bt832_hexdump(i2c_client_s,buf);
+
+	v4l_info(i2c_client_s,"Write 0 tp VPSTATUS\n");
+	buf[0]=BT832_VP_STATUS; // Reg.52
+	buf[1]= 0x00;
+	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
+		v4l_err(i2c_client_s,"i2c i/o error VPS: rc == %d (should be 2)\n",rc);
+
+	bt832_hexdump(i2c_client_s,buf);
+
+
+	// Enable Output
+	v4l_info(i2c_client_s,"Enable Output\n");
+	buf[0]=BT832_VP_CONTROL1; // Reg.40
+	buf[1]= 0x27 & (~0x01); // Default | !skip
+	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
+		v4l_err(i2c_client_s,"i2c i/o error EO: rc == %d (should be 2)\n",rc);
+
+	bt832_hexdump(i2c_client_s,buf);
+
+
+	// for testing (even works when no camera attached)
+	v4l_info(i2c_client_s,"*** Generate NTSC M Bars *****\n");
+	buf[0]=BT832_VP_TESTCONTROL0; // Reg. 42
+	buf[1]=3; // Generate NTSC System M bars, Generate Frame timing internally
+	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
+		v4l_info(i2c_client_s,"i2c i/o error MBAR: rc == %d (should be 2)\n",rc);
+
+	v4l_info(i2c_client_s,"Camera Present: %s\n",
+		(buf[1+BT832_CAM_STATUS] & BT832_56_CAMERA_PRESENT) ? "yes":"no");
+
+	bt832_hexdump(i2c_client_s,buf);
+	kfree(buf);
+	return 1;
+}
+
+
+
+static int bt832_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+	struct bt832 *t;
+
+	client_template.adapter = adap;
+	client_template.addr    = addr;
+
+	if (NULL == (t = kzalloc(sizeof(*t), GFP_KERNEL)))
+		return -ENOMEM;
+	t->client = client_template;
+	i2c_set_clientdata(&t->client, t);
+	i2c_attach_client(&t->client);
+
+	v4l_info(&t->client,"chip found @ 0x%x\n", addr<<1);
+
+
+	if(! bt832_init(&t->client)) {
+		bt832_detach(&t->client);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int bt832_probe(struct i2c_adapter *adap)
+{
+	if (adap->class & I2C_CLASS_TV_ANALOG)
+		return i2c_probe(adap, &addr_data, bt832_attach);
+	return 0;
+}
+
+static int bt832_detach(struct i2c_client *client)
+{
+	struct bt832 *t = i2c_get_clientdata(client);
+
+	v4l_info(&t->client,"dettach\n");
+	i2c_detach_client(client);
+	kfree(t);
+	return 0;
+}
+
+static int
+bt832_command(struct i2c_client *client, unsigned int cmd, void *arg)
+{
+	struct bt832 *t = i2c_get_clientdata(client);
+
+	if (debug>1)
+		v4l_i2c_print_ioctl(&t->client,cmd);
+
+	switch (cmd) {
+		case BT832_HEXDUMP: {
+			unsigned char *buf;
+			buf=kmalloc(65,GFP_KERNEL);
+			bt832_hexdump(&t->client,buf);
+			kfree(buf);
+		}
+		break;
+		case BT832_REATTACH:
+			v4l_info(&t->client,"re-attach\n");
+			i2c_del_driver(&driver);
+			i2c_add_driver(&driver);
+		break;
+	}
+	return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static struct i2c_driver driver = {
+	.driver = {
+		.name   = "bt832",
+	},
+	.id             = 0, /* FIXME */
+	.attach_adapter = bt832_probe,
+	.detach_client  = bt832_detach,
+	.command        = bt832_command,
+};
+static struct i2c_client client_template =
+{
+	.name       = "bt832",
+	.driver     = &driver,
+};
+
+
+static int __init bt832_init_module(void)
+{
+	return i2c_add_driver(&driver);
+}
+
+static void __exit bt832_cleanup_module(void)
+{
+	i2c_del_driver(&driver);
+}
+
+module_init(bt832_init_module);
+module_exit(bt832_cleanup_module);
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */