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[media] usbvision: Drop broken 10-bit I2C address support

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The support for 10-bit I2C addresses in usbvision seems plain broken
to me. I had already noticed that back in February 2007 [1]. The code
was not fixed since then, so I take it that it's not actually needed.
And as a matter of fact I don't know of any 10-bit addressed I2C
tuner, encode, decoder or the like.

So let's simply get rid of the broken and useless code.

I'm also adding I2C_FUNC_I2C, as the driver and hardware support plain
I2C messaging.

[1] http://marc.info/?l=linux-i2c&m=117499415208244&w=2

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jean Delvare 2011-11-07 05:24:49 -03:00 committed by Mauro Carvalho Chehab
parent fdb5a9111e
commit 819cd82b0a
1 changed files with 12 additions and 34 deletions
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46
drivers/media/video/usbvision/usbvision-i2c.c
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@ -110,42 +110,20 @@ static inline int usb_find_address(struct i2c_adapter *i2c_adap,
unsigned char addr;
int ret;
if ((flags & I2C_M_TEN)) {
/* a ten bit address */
addr = 0xf0 | ((msg->addr >> 7) & 0x03);
/* try extended address code... */
addr = (msg->addr << 1);
if (flags & I2C_M_RD)
addr |= 1;
add[0] = addr;
if (flags & I2C_M_RD)
ret = try_read_address(i2c_adap, addr, retries);
else
ret = try_write_address(i2c_adap, addr, retries);
if (ret != 1) {
dev_err(&i2c_adap->dev,
"died at extended address code, while writing\n");
return -EREMOTEIO;
}
add[0] = addr;
if (flags & I2C_M_RD) {
/* okay, now switch into reading mode */
addr |= 0x01;
ret = try_read_address(i2c_adap, addr, retries);
if (ret != 1) {
dev_err(&i2c_adap->dev,
"died at extended address code, while reading\n");
return -EREMOTEIO;
}
}
} else { /* normal 7bit address */
addr = (msg->addr << 1);
if (flags & I2C_M_RD)
addr |= 1;
if (ret != 1)
return -EREMOTEIO;
add[0] = addr;
if (flags & I2C_M_RD)
ret = try_read_address(i2c_adap, addr, retries);
else
ret = try_write_address(i2c_adap, addr, retries);
if (ret != 1)
return -EREMOTEIO;
}
return 0;
}
@ -184,7 +162,7 @@ usbvision_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
static u32 functionality(struct i2c_adapter *adap)
{
return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR;
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
/* -----exported algorithm data: ------------------------------------- */