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path: root/drivers/media/video/usbvision/usbvision-i2c.c
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Diffstat (limited to 'drivers/media/video/usbvision/usbvision-i2c.c')
-rw-r--r--drivers/media/video/usbvision/usbvision-i2c.c104
1 files changed, 46 insertions, 58 deletions
diff --git a/drivers/media/video/usbvision/usbvision-i2c.c b/drivers/media/video/usbvision/usbvision-i2c.c
index 609e1fd9c784..025be555194f 100644
--- a/drivers/media/video/usbvision/usbvision-i2c.c
+++ b/drivers/media/video/usbvision/usbvision-i2c.c
@@ -1,8 +1,8 @@
/*
- * I2C_ALGO_USB.C
+ * usbvision_i2c.c
* i2c algorithm for USB-I2C Bridges
*
- * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
+ * Copyright (c) 1999-2007 Joerg Heckenbach <joerg@heckenbach-aw.de>
* Dwaine Garden <dwainegarden@rogers.com>
*
* This module is part of usbvision driver project.
@@ -39,7 +39,6 @@
#include "usbvision.h"
#define DBG_I2C 1<<0
-#define DBG_ALGO 1<<1
static int i2c_debug = 0;
@@ -49,22 +48,22 @@ MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
#define PDEBUG(level, fmt, args...) \
if (i2c_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
-static int usbvision_i2c_write(void *data, unsigned char addr, char *buf,
+static int usbvision_i2c_write(struct usb_usbvision *usbvision, unsigned char addr, char *buf,
short len);
-static int usbvision_i2c_read(void *data, unsigned char addr, char *buf,
+static int usbvision_i2c_read(struct usb_usbvision *usbvision, unsigned char addr, char *buf,
short len);
static inline int try_write_address(struct i2c_adapter *i2c_adap,
unsigned char addr, int retries)
{
- void *data;
+ struct usb_usbvision *usbvision;
int i, ret = -1;
char buf[4];
- data = i2c_get_adapdata(i2c_adap);
+ usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap);
buf[0] = 0x00;
for (i = 0; i <= retries; i++) {
- ret = (usbvision_i2c_write(data, addr, buf, 1));
+ ret = (usbvision_i2c_write(usbvision, addr, buf, 1));
if (ret == 1)
break; /* success! */
udelay(5);
@@ -73,8 +72,8 @@ static inline int try_write_address(struct i2c_adapter *i2c_adap,
udelay(10);
}
if (i) {
- PDEBUG(DBG_ALGO,"Needed %d retries for address %#2x", i, addr);
- PDEBUG(DBG_ALGO,"Maybe there's no device at this address");
+ PDEBUG(DBG_I2C,"Needed %d retries for address %#2x", i, addr);
+ PDEBUG(DBG_I2C,"Maybe there's no device at this address");
}
return ret;
}
@@ -82,13 +81,13 @@ static inline int try_write_address(struct i2c_adapter *i2c_adap,
static inline int try_read_address(struct i2c_adapter *i2c_adap,
unsigned char addr, int retries)
{
- void *data;
+ struct usb_usbvision *usbvision;
int i, ret = -1;
char buf[4];
- data = i2c_get_adapdata(i2c_adap);
+ usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap);
for (i = 0; i <= retries; i++) {
- ret = (usbvision_i2c_read(data, addr, buf, 1));
+ ret = (usbvision_i2c_read(usbvision, addr, buf, 1));
if (ret == 1)
break; /* success! */
udelay(5);
@@ -97,8 +96,8 @@ static inline int try_read_address(struct i2c_adapter *i2c_adap,
udelay(10);
}
if (i) {
- PDEBUG(DBG_ALGO,"Needed %d retries for address %#2x", i, addr);
- PDEBUG(DBG_ALGO,"Maybe there's no device at this address");
+ PDEBUG(DBG_I2C,"Needed %d retries for address %#2x", i, addr);
+ PDEBUG(DBG_I2C,"Maybe there's no device at this address");
}
return ret;
}
@@ -152,32 +151,32 @@ static inline int usb_find_address(struct i2c_adapter *i2c_adap,
}
static int
-usb_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
+usbvision_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
{
struct i2c_msg *pmsg;
- void *data;
+ struct usb_usbvision *usbvision;
int i, ret;
unsigned char addr;
- data = i2c_get_adapdata(i2c_adap);
+ usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap);
for (i = 0; i < num; i++) {
pmsg = &msgs[i];
ret = usb_find_address(i2c_adap, pmsg, i2c_adap->retries, &addr);
if (ret != 0) {
- PDEBUG(DBG_ALGO,"got NAK from device, message #%d", i);
+ PDEBUG(DBG_I2C,"got NAK from device, message #%d", i);
return (ret < 0) ? ret : -EREMOTEIO;
}
if (pmsg->flags & I2C_M_RD) {
/* read bytes into buffer */
- ret = (usbvision_i2c_read(data, addr, pmsg->buf, pmsg->len));
+ ret = (usbvision_i2c_read(usbvision, addr, pmsg->buf, pmsg->len));
if (ret < pmsg->len) {
return (ret < 0) ? ret : -EREMOTEIO;
}
} else {
/* write bytes from buffer */
- ret = (usbvision_i2c_write(data, addr, pmsg->buf, pmsg->len));
+ ret = (usbvision_i2c_write(usbvision, addr, pmsg->buf, pmsg->len));
if (ret < pmsg->len) {
return (ret < 0) ? ret : -EREMOTEIO;
}
@@ -191,7 +190,7 @@ static int algo_control(struct i2c_adapter *adapter, unsigned int cmd, unsigned
return 0;
}
-static u32 usb_func(struct i2c_adapter *adap)
+static u32 functionality(struct i2c_adapter *adap)
{
return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR | I2C_FUNC_PROTOCOL_MANGLING;
}
@@ -199,11 +198,11 @@ static u32 usb_func(struct i2c_adapter *adap)
/* -----exported algorithm data: ------------------------------------- */
-static struct i2c_algorithm i2c_usb_algo = {
- .master_xfer = usb_xfer,
+static struct i2c_algorithm usbvision_algo = {
+ .master_xfer = usbvision_i2c_xfer,
.smbus_xfer = NULL,
.algo_control = algo_control,
- .functionality = usb_func,
+ .functionality = functionality,
};
@@ -213,41 +212,29 @@ static struct i2c_algorithm i2c_usb_algo = {
static int usbvision_i2c_usb_add_bus(struct i2c_adapter *adap)
{
PDEBUG(DBG_I2C, "I2C debugging is enabled [i2c]");
- PDEBUG(DBG_ALGO, "ALGO debugging is enabled [i2c]");
+ PDEBUG(DBG_I2C, "ALGO debugging is enabled [i2c]");
/* register new adapter to i2c module... */
- adap->algo = &i2c_usb_algo;
+ adap->algo = &usbvision_algo;
adap->timeout = 100; /* default values, should */
adap->retries = 3; /* be replaced by defines */
i2c_add_adapter(adap);
- PDEBUG(DBG_ALGO,"i2c bus for %s registered", adap->name);
-
- return 0;
-}
-
-
-int usbvision_i2c_usb_del_bus(struct i2c_adapter *adap)
-{
-
- i2c_del_adapter(adap);
-
- PDEBUG(DBG_ALGO,"i2c bus for %s unregistered", adap->name);
+ PDEBUG(DBG_I2C,"i2c bus for %s registered", adap->name);
return 0;
}
-
/* ----------------------------------------------------------------------- */
/* usbvision specific I2C functions */
/* ----------------------------------------------------------------------- */
static struct i2c_adapter i2c_adap_template;
static struct i2c_client i2c_client_template;
-int usbvision_init_i2c(struct usb_usbvision *usbvision)
+int usbvision_i2c_register(struct usb_usbvision *usbvision)
{
memcpy(&usbvision->i2c_adap, &i2c_adap_template,
sizeof(struct i2c_adapter));
@@ -265,7 +252,7 @@ int usbvision_init_i2c(struct usb_usbvision *usbvision)
usbvision->i2c_client.adapter = &usbvision->i2c_adap;
if (usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_IIC_LRNACK) < 0) {
- printk(KERN_ERR "usbvision_init_i2c: can't write reg\n");
+ printk(KERN_ERR "usbvision_register: can't write reg\n");
return -EBUSY;
}
@@ -287,6 +274,16 @@ int usbvision_init_i2c(struct usb_usbvision *usbvision)
return usbvision_i2c_usb_add_bus(&usbvision->i2c_adap);
}
+int usbvision_i2c_unregister(struct usb_usbvision *usbvision)
+{
+
+ i2c_del_adapter(&(usbvision->i2c_adap));
+
+ PDEBUG(DBG_I2C,"i2c bus for %s unregistered", usbvision->i2c_adap.name);
+
+ return 0;
+}
+
void call_i2c_clients(struct usb_usbvision *usbvision, unsigned int cmd,
void *arg)
{
@@ -300,19 +297,12 @@ static int attach_inform(struct i2c_client *client)
usbvision = (struct usb_usbvision *)i2c_get_adapdata(client->adapter);
switch (client->addr << 1) {
- case 0x43:
- case 0x4b:
- {
- struct tuner_setup tun_setup;
-
- tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
- tun_setup.type = TUNER_TDA9887;
- tun_setup.addr = client->addr;
-
- call_i2c_clients(usbvision, TUNER_SET_TYPE_ADDR, &tun_setup);
-
+ case 0x42 << 1:
+ case 0x43 << 1:
+ case 0x4a << 1:
+ case 0x4b << 1:
+ PDEBUG(DBG_I2C,"attach_inform: tda9887 detected.");
break;
- }
case 0x42:
PDEBUG(DBG_I2C,"attach_inform: saa7114 detected.");
break;
@@ -480,7 +470,7 @@ static int usbvision_i2c_write_max4(struct usb_usbvision *usbvision,
return len;
}
-static int usbvision_i2c_write(void *data, unsigned char addr, char *buf,
+static int usbvision_i2c_write(struct usb_usbvision *usbvision, unsigned char addr, char *buf,
short len)
{
char *bufPtr = buf;
@@ -488,7 +478,6 @@ static int usbvision_i2c_write(void *data, unsigned char addr, char *buf,
int wrcount = 0;
int count;
int maxLen = 4;
- struct usb_usbvision *usbvision = (struct usb_usbvision *) data;
while (len > 0) {
count = (len > maxLen) ? maxLen : len;
@@ -503,14 +492,13 @@ static int usbvision_i2c_write(void *data, unsigned char addr, char *buf,
return wrcount;
}
-static int usbvision_i2c_read(void *data, unsigned char addr, char *buf,
+static int usbvision_i2c_read(struct usb_usbvision *usbvision, unsigned char addr, char *buf,
short len)
{
char temp[4];
int retval, i;
int rdcount = 0;
int count;
- struct usb_usbvision *usbvision = (struct usb_usbvision *) data;
while (len > 0) {
count = (len > 3) ? 4 : len;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.