/*
+ $Id: bttv-i2c.c,v 1.17 2004/12/14 15:33:30 kraxel Exp $
+
bttv-i2c.c -- all the i2c code is here
bttv - Bt848 frame grabber driver
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
+
*/
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/io.h>
static struct i2c_adapter bttv_i2c_adap_hw_template;
static struct i2c_client bttv_i2c_client_template;
-#ifndef I2C_PEC
-static void bttv_inc_use(struct i2c_adapter *adap);
-static void bttv_dec_use(struct i2c_adapter *adap);
-#endif
static int attach_inform(struct i2c_client *client);
static int detach_inform(struct i2c_client *client);
static int i2c_debug = 0;
static int i2c_hw = 0;
-MODULE_PARM(i2c_debug,"i");
-MODULE_PARM(i2c_hw,"i");
+static int i2c_scan = 0;
+module_param(i2c_debug, int, 0644);
+module_param(i2c_hw, int, 0444);
+module_param(i2c_scan, int, 0444);
+MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
/* ----------------------------------------------------------------------- */
/* I2C functions - bitbanging adapter (software i2c) */
-void bttv_bit_setscl(void *data, int state)
+static void bttv_bit_setscl(void *data, int state)
{
struct bttv *btv = (struct bttv*)data;
btread(BT848_I2C);
}
-void bttv_bit_setsda(void *data, int state)
+static void bttv_bit_setsda(void *data, int state)
{
struct bttv *btv = (struct bttv*)data;
{
struct bttv *btv = (struct bttv*)data;
int state;
-
+
state = btread(BT848_I2C) & 0x02 ? 1 : 0;
return state;
}
};
static struct i2c_adapter bttv_i2c_adap_sw_template = {
-#ifdef I2C_PEC
.owner = THIS_MODULE,
-#else
- .inc_use = bttv_inc_use,
- .dec_use = bttv_dec_use,
-#endif
#ifdef I2C_CLASS_TV_ANALOG
.class = I2C_CLASS_TV_ANALOG,
#endif
/* ----------------------------------------------------------------------- */
/* I2C functions - hardware i2c */
-static int algo_control(struct i2c_adapter *adapter,
+static int algo_control(struct i2c_adapter *adapter,
unsigned int cmd, unsigned long arg)
{
return 0;
{
DECLARE_WAITQUEUE(wait, current);
int rc = 0;
-
+
add_wait_queue(&btv->i2c_queue, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
if (0 == btv->i2c_done)
- schedule_timeout(HZ/50+1);
- set_current_state(TASK_RUNNING);
+ msleep_interruptible(20);
remove_wait_queue(&btv->i2c_queue, &wait);
if (0 == btv->i2c_done)
return retval;
}
-int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
+static int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
{
struct bttv *btv = i2c_get_adapdata(i2c_adap);
int retval = 0;
};
static struct i2c_adapter bttv_i2c_adap_hw_template = {
-#ifdef I2C_PEC
.owner = THIS_MODULE,
-#else
- .inc_use = bttv_inc_use,
- .dec_use = bttv_dec_use,
-#endif
#ifdef I2C_CLASS_TV_ANALOG
.class = I2C_CLASS_TV_ANALOG,
#endif
/* ----------------------------------------------------------------------- */
/* I2C functions - common stuff */
-#ifndef I2C_PEC
-static void bttv_inc_use(struct i2c_adapter *adap)
-{
- MOD_INC_USE_COUNT;
-}
-
-static void bttv_dec_use(struct i2c_adapter *adap)
-{
- MOD_DEC_USE_COUNT;
-}
-#endif
-
static int attach_inform(struct i2c_client *client)
{
struct bttv *btv = i2c_get_adapdata(client->adapter);
i2c_clients_command(&btv->c.i2c_adap, cmd, arg);
}
-void bttv_i2c_call(unsigned int card, unsigned int cmd, void *arg)
-{
- if (card >= bttv_num)
- return;
- bttv_call_i2c_clients(&bttvs[card], cmd, arg);
-}
-
static struct i2c_client bttv_i2c_client_template = {
I2C_DEVNAME("bttv internal"),
.id = -1,
/* read I2C */
-int bttv_I2CRead(struct bttv *btv, unsigned char addr, char *probe_for)
+int bttv_I2CRead(struct bttv *btv, unsigned char addr, char *probe_for)
{
unsigned char buffer = 0;
/* read EEPROM content */
void __devinit bttv_readee(struct bttv *btv, unsigned char *eedata, int addr)
{
- int i;
-
- if (bttv_I2CWrite(btv, addr, 0, -1, 0)<0) {
- printk(KERN_WARNING "bttv: readee error\n");
- return;
- }
btv->i2c_client.addr = addr >> 1;
- for (i=0; i<256; i+=16) {
- if (16 != i2c_master_recv(&btv->i2c_client,eedata+i,16)) {
- printk(KERN_WARNING "bttv: readee error\n");
- break;
- }
+ tveeprom_read(&btv->i2c_client, eedata, 256);
+}
+
+static char *i2c_devs[128] = {
+ [ 0x30 >> 1 ] = "IR (hauppauge)",
+ [ 0x80 >> 1 ] = "msp34xx",
+ [ 0x86 >> 1 ] = "tda9887",
+ [ 0xa0 >> 1 ] = "eeprom",
+ [ 0xc0 >> 1 ] = "tuner (analog)",
+ [ 0xc2 >> 1 ] = "tuner (analog)",
+};
+
+static void do_i2c_scan(char *name, struct i2c_client *c)
+{
+ unsigned char buf;
+ int i,rc;
+
+ 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 @ 0x%x [%s]\n",
+ name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
}
}
i2c_set_adapdata(&btv->c.i2c_adap, btv);
btv->i2c_client.adapter = &btv->c.i2c_adap;
+#ifdef I2C_CLASS_TV_ANALOG
+ if (bttv_tvcards[btv->c.type].no_video)
+ btv->c.i2c_adap.class &= ~I2C_CLASS_TV_ANALOG;
+ if (bttv_tvcards[btv->c.type].has_dvb)
+ btv->c.i2c_adap.class |= I2C_CLASS_TV_DIGITAL;
+#endif
+
if (btv->use_i2c_hw) {
btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap);
} else {
bttv_bit_setsda(btv,1);
btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap);
}
+ if (0 == btv->i2c_rc && i2c_scan)
+ do_i2c_scan(btv->c.name,&btv->i2c_client);
return btv->i2c_rc;
}
git://git.onelab.eu / linux-2.6.git / blobdiff