int az6007_identify_state(struct usb_device *udev,
struct dvb_usb_device_properties *props,
struct dvb_usb_device_description **desc, int *cold)
{
int ret;
u8 *mac;
mac = kmalloc(6, GFP_ATOMIC);
if (!mac)
return -ENOMEM;
/* Try to read the mac address */
ret = __az6007_read(udev, AZ6007_READ_DATA, 6, 0, mac, 6);
if (ret == 6)
*cold = 0;
else
*cold = 1;
kfree(mac);
if (*cold) {
__az6007_write(udev, 0x09, 1, 0, NULL, 0);
__az6007_write(udev, 0x00, 0, 0, NULL, 0);
__az6007_write(udev, 0x00, 0, 0, NULL, 0);
}
deb_info("Device is on %s state\n", *cold ? "warm" : "cold");
return 0;
}
static int az6007_identify_state(struct dvb_usb_device *d, const char **name)
{
int ret;
u8 *mac;
pr_debug("Identifying az6007 state\n");
mac = kmalloc(6, GFP_ATOMIC);
if (!mac)
return -ENOMEM;
/* Try to read the mac address */
ret = __az6007_read(d->udev, AZ6007_READ_DATA, 6, 0, mac, 6);
if (ret == 6)
ret = WARM;
else
ret = COLD;
kfree(mac);
if (ret == COLD) {
__az6007_write(d->udev, 0x09, 1, 0, NULL, 0);
__az6007_write(d->udev, 0x00, 0, 0, NULL, 0);
__az6007_write(d->udev, 0x00, 0, 0, NULL, 0);
}
pr_debug("Device is on %s state\n",
ret == WARM ? "warm" : "cold");
return ret;
}
static int az6007_read(struct dvb_usb_device *d, u8 req, u16 value,
u16 index, u8 *b, int blen)
{
struct az6007_device_state *st = d->priv;
int ret;
if (mutex_lock_interruptible(&st->mutex) < 0)
return -EAGAIN;
ret = __az6007_read(d->udev, req, value, index, b, blen);
mutex_unlock(&st->mutex);
return ret;
}
/* I2C */
static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
int num)
{
struct dvb_usb_device *d = i2c_get_adapdata(adap);
struct az6007_device_state *st = d->priv;
int i, j, len;
int ret = 0;
u16 index;
u16 value;
int length;
u8 req, addr;
if (mutex_lock_interruptible(&st->mutex) < 0)
return -EAGAIN;
for (i = 0; i < num; i++) {
addr = msgs[i].addr << 1;
if (((i + 1) < num)
&& (msgs[i].len == 1)
&& (!msgs[i].flags & I2C_M_RD)
&& (msgs[i + 1].flags & I2C_M_RD)
&& (msgs[i].addr == msgs[i + 1].addr)) {
/*
* A write + read xfer for the same address, where
* the first xfer has just 1 byte length.
* Need to join both into one operation
*/
if (dvb_usb_az6007_debug & 2)
printk(KERN_DEBUG
"az6007 I2C xfer write+read addr=0x%x len=%d/%d: ",
addr, msgs[i].len, msgs[i + 1].len);
req = AZ6007_I2C_RD;
index = msgs[i].buf[0];
value = addr | (1 << 8);
length = 6 + msgs[i + 1].len;
len = msgs[i + 1].len;
ret = __az6007_read(d->udev, req, value, index,
st->data, length);
if (ret >= len) {
for (j = 0; j < len; j++) {
msgs[i + 1].buf[j] = st->data[j + 5];
if (dvb_usb_az6007_debug & 2)
printk(KERN_CONT
"0x%02x ",
msgs[i + 1].buf[j]);
}
} else
ret = -EIO;
i++;
} else if (!(msgs[i].flags & I2C_M_RD)) {
/* write bytes */
if (dvb_usb_az6007_debug & 2)
printk(KERN_DEBUG
"az6007 I2C xfer write addr=0x%x len=%d: ",
addr, msgs[i].len);
req = AZ6007_I2C_WR;
index = msgs[i].buf[0];
value = addr | (1 << 8);
length = msgs[i].len - 1;
len = msgs[i].len - 1;
if (dvb_usb_az6007_debug & 2)
printk(KERN_CONT "(0x%02x) ", msgs[i].buf[0]);
for (j = 0; j < len; j++) {
st->data[j] = msgs[i].buf[j + 1];
if (dvb_usb_az6007_debug & 2)
printk(KERN_CONT "0x%02x ",
st->data[j]);
}
ret = __az6007_write(d->udev, req, value, index,
st->data, length);
} else {
/* read bytes */
if (dvb_usb_az6007_debug & 2)
printk(KERN_DEBUG
"az6007 I2C xfer read addr=0x%x len=%d: ",
addr, msgs[i].len);
req = AZ6007_I2C_RD;
index = msgs[i].buf[0];
value = addr;
length = msgs[i].len + 6;
len = msgs[i].len;
ret = __az6007_read(d->udev, req, value, index,
st->data, length);
for (j = 0; j < len; j++) {
msgs[i].buf[j] = st->data[j + 5];
if (dvb_usb_az6007_debug & 2)
printk(KERN_CONT
"0x%02x ", st->data[j + 5]);
}
}
if (dvb_usb_az6007_debug & 2)
printk(KERN_CONT "\n");
if (ret < 0)
goto err;
}
err:
mutex_unlock(&st->mutex);
if (ret < 0) {
info("%s ERROR: %i", __func__, ret);
return ret;
}
return num;
}
