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 000000000000..a51876137880
--- /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:
+ */