/*
+ * $Id: saa7134-i2c.c,v 1.7 2004/11/07 13:17:15 kraxel Exp $
+ *
* device driver for philips saa7134 based TV cards
* i2c interface support
*
/* ----------------------------------------------------------- */
static unsigned int i2c_debug = 0;
-MODULE_PARM(i2c_debug,"i");
+module_param(i2c_debug, int, 0644);
MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
static unsigned int i2c_scan = 0;
-MODULE_PARM(i2c_scan,"i");
+module_param(i2c_scan, int, 0444);
MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
#define d1printk if (1 == i2c_debug) printk
static inline enum i2c_status i2c_get_status(struct saa7134_dev *dev)
{
enum i2c_status status;
-
+
status = saa_readb(SAA7134_I2C_ATTR_STATUS) & 0x0f;
d2printk(KERN_DEBUG "%s: i2c stat <= %s\n",dev->name,
str_i2c_status[status]);
if (!i2c_is_idle(status))
return FALSE;
-
+
i2c_set_attr(dev,NOP);
return TRUE;
}
saa_writel(SAA7134_I2C_ATTR_STATUS >> 2, dword);
#endif
d2printk(KERN_DEBUG "%s: i2c data => 0x%x\n",dev->name,data);
-
+
if (!i2c_is_busy_wait(dev))
return -EIO;
status = i2c_get_status(dev);
{
enum i2c_status status;
unsigned char data;
-
+
i2c_set_attr(dev,CONTINUE);
if (!i2c_is_busy_wait(dev))
return -EIO;
/* ----------------------------------------------------------- */
-static int algo_control(struct i2c_adapter *adapter,
+static int algo_control(struct i2c_adapter *adapter,
unsigned int cmd, unsigned long arg)
{
return 0;
return 0;
}
-static int
-saa7134_i2c_scan(struct saa7134_dev *dev)
+static char *i2c_devs[128] = {
+ [ 0x20 ] = "mpeg encoder (saa6752hs)",
+ [ 0xa0 >> 1 ] = "eeprom",
+ [ 0xc0 >> 1 ] = "tuner (analog)",
+ [ 0x86 >> 1 ] = "tda9887",
+};
+
+static void do_i2c_scan(char *name, struct i2c_client *c)
{
unsigned char buf;
int i,rc;
- for (i = 0; i < 256; i+= 2) {
- dev->i2c_client.addr = i >> 1;
- rc = i2c_master_recv(&dev->i2c_client,&buf,0);
+ for (i = 0; i < 128; i++) {
+ c->addr = i;
+ rc = i2c_master_recv(c,&buf,0);
if (rc < 0)
continue;
- printk("%s: i2c scan: found device @ %x%s\n",
- dev->name, i, (i == 0xa0) ? " [eeprom]" : "");
+ printk("%s: i2c scan: found device @ 0x%x [%s]\n",
+ name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
}
- return 0;
}
void saa7134_i2c_call_clients(struct saa7134_dev *dev,
strcpy(dev->i2c_adap.name,dev->name);
dev->i2c_adap.algo_data = dev;
i2c_add_adapter(&dev->i2c_adap);
-
+
dev->i2c_client = saa7134_client_template;
dev->i2c_client.adapter = &dev->i2c_adap;
-
+
saa7134_i2c_eeprom(dev,dev->eedata,sizeof(dev->eedata));
if (i2c_scan)
- saa7134_i2c_scan(dev);
+ do_i2c_scan(dev->name,&dev->i2c_client);
return 0;
}