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 !
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/slab.h>
+#include <media/audiochip.h>
+#include <media/v4l2-common.h>
-#include "id.h"
-#include "audiochip.h"
#include "bttv.h"
#include "bt832.h"
MODULE_LICENSE("GPL");
/* Addresses to scan */
-static unsigned short normal_i2c[] = {I2C_CLIENT_END};
-static unsigned short normal_i2c_range[] = {I2C_BT832_ALT1>>1,I2C_BT832_ALT2>>1,I2C_CLIENT_END};
+static unsigned short normal_i2c[] = { I2C_BT832_ALT1>>1, I2C_BT832_ALT2>>1,
+ I2C_CLIENT_END };
I2C_CLIENT_INSMOD;
-/* ---------------------------------------------------------------------- */
+int debug; /* debug output */
+module_param(debug, int, 0644);
-#define dprintk if (debug) printk
+/* ---------------------------------------------------------------------- */
static int bt832_detach(struct i2c_client *client);
static struct i2c_client client_template;
struct bt832 {
- struct i2c_client client;
+ 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)))
- printk("bt832: i2c i/o error: rc == %d (should be 1)\n",rc);
+ 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)))
- printk("bt832: i2c i/o error: rc == %d (should be 65)\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)
+ // Note: On READ the first byte is the current index
+ // (e.g. 0x80, what we just wrote)
- if(1) {
- int i;
- printk("BT832 hexdump:\n");
- for(i=1;i<65;i++) {
+ 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");
+ 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");
- }
+ printk(" %02x",buf[i]);
+ }
+ printk("\n");
+ }
return 0;
}
buf=kmalloc(65,GFP_KERNEL);
bt832_hexdump(i2c_client_s,buf);
-
+
if(buf[0x40] != 0x31) {
- printk("bt832: this i2c chip is no bt832 (id=%02x). Detaching.\n",buf[0x40]);
+ v4l_err(i2c_client_s,"This i2c chip is no bt832 (id=%02x). Detaching.\n",buf[0x40]);
kfree(buf);
return 0;
}
- printk("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)))
- printk("bt832: i2c i/o error VPS: rc == %d (should be 2)\n",rc);
+ 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);
+ bt832_hexdump(i2c_client_s,buf);
// Leave low power mode:
- printk("Bt832: leave low power mode.\n");
+ 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)))
- printk("bt832: i2c i/o error LLPM: rc == %d (should be 2)\n",rc);
+ v4l_err(i2c_client_s,"i2c i/o error LLPM: rc == %d (should be 2)\n",rc);
- bt832_hexdump(i2c_client_s,buf);
+ bt832_hexdump(i2c_client_s,buf);
- printk("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)))
- printk("bt832: i2c i/o error VPS: rc == %d (should be 2)\n",rc);
+ 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);
+ bt832_hexdump(i2c_client_s,buf);
// Enable Output
- printk("Enable Output\n");
+ 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)))
- printk("bt832: i2c i/o error EO: rc == %d (should be 2)\n",rc);
-
- bt832_hexdump(i2c_client_s,buf);
-
-#if 0
- // Full 30/25 Frame rate
- printk("Full 30/25 Frame rate\n");
- buf[0]=BT832_VP_CONTROL0; // Reg.39
- buf[1]= 0x00;
- if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
- printk("bt832: i2c i/o error FFR: rc == %d (should be 2)\n",rc);
-
- bt832_hexdump(i2c_client_s,buf);
-#endif
-
-#if 1
+ 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)
- printk("bt832: *** Generate NTSC M Bars *****\n");
+ 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)))
- printk("bt832: i2c i/o error MBAR: rc == %d (should be 2)\n",rc);
-#endif
+ 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);
- printk("Bt832: Camera Present: %s\n",
+ 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);
+ bt832_hexdump(i2c_client_s,buf);
kfree(buf);
return 1;
}
-static int bt832_attach(struct i2c_adapter *adap, int addr,
- unsigned short flags, int kind)
+static int bt832_attach(struct i2c_adapter *adap, int addr, int kind)
{
struct bt832 *t;
- printk("bt832_attach\n");
+ client_template.adapter = adap;
+ client_template.addr = addr;
- 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);
- printk("bt832: chip found @ 0x%x\n", addr<<1);
+ v4l_info(&t->client,"chip found @ 0x%x\n", addr<<1);
- if (NULL == (t = kmalloc(sizeof(*t), GFP_KERNEL)))
- return -ENOMEM;
- memset(t,0,sizeof(*t));
- t->client = client_template;
- t->client.data = t;
- i2c_attach_client(&t->client);
if(! bt832_init(&t->client)) {
bt832_detach(&t->client);
return -1;
}
-
+
return 0;
}
static int bt832_detach(struct i2c_client *client)
{
- struct bt832 *t = (struct bt832*)client->data;
+ struct bt832 *t = i2c_get_clientdata(client);
- printk("bt832: detach.\n");
+ 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 = (struct bt832*)client->data;
+ struct bt832 *t = i2c_get_clientdata(client);
- printk("bt832: command %x\n",cmd);
+ if (debug>1)
+ v4l_i2c_print_ioctl(&t->client,cmd);
- switch (cmd) {
+ switch (cmd) {
case BT832_HEXDUMP: {
unsigned char *buf;
buf=kmalloc(65,GFP_KERNEL);
}
break;
case BT832_REATTACH:
- printk("bt832: re-attach\n");
+ v4l_info(&t->client,"re-attach\n");
i2c_del_driver(&driver);
i2c_add_driver(&driver);
break;
/* ----------------------------------------------------------------------- */
static struct i2c_driver driver = {
- .owner = THIS_MODULE,
- .name = "i2c bt832 driver",
- .id = -1, /* FIXME */
- .flags = I2C_DF_NOTIFY,
- .attach_adapter = bt832_probe,
- .detach_client = bt832_detach,
- .command = bt832_command,
+ .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",
- .flags = I2C_CLIENT_ALLOW_USE,
- .driver = &driver,
+ .name = "bt832",
+ .driver = &driver,
};
-int bt832_init_module(void)
+static int __init bt832_init_module(void)
{
- i2c_add_driver(&driver);
- return 0;
+ return i2c_add_driver(&driver);
}
-static void bt832_cleanup_module(void)
+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:
+ */
git://git.onelab.eu / linux-2.6.git / blobdiff