static int saa7111_write_block(struct saa7111 *dev,
unsigned const char *data, unsigned int len)
{
int ack = -1;
unsigned subaddr;
while (len > 1) {
LOCK_I2C_BUS(dev->bus);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
ack = i2c_sendbyte(dev->bus, (subaddr = *data++), I2C_DELAY);
ack = i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++), I2C_DELAY);
len -= 2;
while (len > 1 && *data == ++subaddr) {
data++;
ack =
i2c_sendbyte(dev->bus,
(dev->reg[subaddr] =
*data++), I2C_DELAY);
len -= 2;
}
i2c_stop(dev->bus);
UNLOCK_I2C_BUS(dev->bus);
}
return ack;
}
static void i2c_attach_device(struct i2c_bus *bus, struct i2c_driver *driver)
{
struct i2c_device *device;
int i,j,ack=1;
unsigned char addr;
LOCK_FLAGS;
/* probe for device */
LOCK_I2C_BUS(bus);
for (addr = driver->addr_l; addr <= driver->addr_h; addr += 2)
{
i2c_start(bus);
ack = i2c_sendbyte(bus,addr,0);
i2c_stop(bus);
if (!ack)
break;
}
UNLOCK_I2C_BUS(bus);
if (ack)
return;
/* got answer */
for (i = 0; i < I2C_DEVICE_MAX; i++)
if (NULL == driver->devices[i])
break;
if (I2C_DEVICE_MAX == i)
return;
for (j = 0; j < I2C_DEVICE_MAX; j++)
if (NULL == bus->devices[j])
break;
if (I2C_DEVICE_MAX == j)
return;
if (NULL == (device = kmalloc(sizeof(struct i2c_device),GFP_KERNEL)))
return;
device->bus = bus;
device->driver = driver;
device->addr = addr;
/* Attach */
if (driver->attach(device)!=0)
{
kfree(device);
return;
}
driver->devices[i] = device;
driver->devcount++;
bus->devices[j] = device;
bus->devcount++;
if (bus->attach_inform)
bus->attach_inform(bus,driver->id);
REGPRINT(printk("i2c: device attached: %s (addr=0x%02x, bus=%s, driver=%s)\n",device->name,addr,bus->name,driver->name));
}
static int saa7185_read(struct saa7185 *dev)
{
int ack;
LOCK_I2C_BUS(dev->bus);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr | 1, I2C_DELAY);
ack = i2c_readbyte(dev->bus, 1);
i2c_stop(dev->bus);
UNLOCK_I2C_BUS(dev->bus);
return ack;
}
static
int saa7110_read(struct saa7110* decoder)
{
int data;
LOCK_I2C_BUS(decoder->bus);
i2c_start(decoder->bus);
i2c_sendbyte(decoder->bus, decoder->addr, I2C_DELAY);
i2c_start(decoder->bus);
i2c_sendbyte(decoder->bus, decoder->addr | 1, I2C_DELAY);
data = i2c_readbyte(decoder->bus, 1);
i2c_stop(decoder->bus);
UNLOCK_I2C_BUS(decoder->bus);
return data;
}
/* ----------------------------------------------------------------------- */
static
int saa7110_write(struct saa7110 *decoder, unsigned char subaddr, unsigned char data)
{
int ack;
LOCK_I2C_BUS(decoder->bus);
i2c_start(decoder->bus);
i2c_sendbyte(decoder->bus, decoder->addr, I2C_DELAY);
i2c_sendbyte(decoder->bus, subaddr, I2C_DELAY);
ack = i2c_sendbyte(decoder->bus, data, I2C_DELAY);
i2c_stop(decoder->bus);
decoder->reg[subaddr] = data;
UNLOCK_I2C_BUS(decoder->bus);
return ack;
}
static int saa7111_read(struct saa7111 *dev, unsigned char subaddr)
{
int data;
LOCK_I2C_BUS(dev->bus);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr | 1, I2C_DELAY);
data = i2c_readbyte(dev->bus, 1);
i2c_stop(dev->bus);
UNLOCK_I2C_BUS(dev->bus);
return data;
}
static int bt856_write(struct bt856 *dev, unsigned char subaddr,
unsigned char data)
{
int ack;
LOCK_I2C_BUS(dev->bus);
i2c_start(dev->bus);
i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
ack = i2c_sendbyte(dev->bus, data, I2C_DELAY);
dev->reg[subaddr] = data;
i2c_stop(dev->bus);
UNLOCK_I2C_BUS(dev->bus);
return ack;
}
int i2c_register_bus(struct i2c_bus *bus)
{
int i,ack;
LOCK_FLAGS;
memset(bus->devices,0,sizeof(bus->devices));
bus->devcount = 0;
for (i = 0; i < I2C_BUS_MAX; i++)
if (NULL == busses[i])
break;
if (I2C_BUS_MAX == i)
return -ENOMEM;
busses[i] = bus;
bus_count++;
REGPRINT(printk("i2c: bus registered: %s\n",bus->name));
MOD_INC_USE_COUNT;
if (scan)
{
/* scan whole i2c bus */
LOCK_I2C_BUS(bus);
for (i = 0; i < 256; i+=2)
{
i2c_start(bus);
ack = i2c_sendbyte(bus,i,0);
i2c_stop(bus);
if (!ack)
{
printk(KERN_INFO "i2c: scanning bus %s: found device at addr=0x%02x\n",
bus->name,i);
}
}
UNLOCK_I2C_BUS(bus);
}
/* probe available drivers */
for (i = 0; i < I2C_DRIVER_MAX; i++)
if (drivers[i])
i2c_attach_device(bus,drivers[i]);
return 0;
}
static
int saa7110_write_block(struct saa7110* decoder, unsigned const char *data, unsigned int len)
{
unsigned subaddr = *data;
LOCK_I2C_BUS(decoder->bus);
i2c_start(decoder->bus);
i2c_sendbyte(decoder->bus,decoder->addr,I2C_DELAY);
while (len-- > 0) {
if (i2c_sendbyte(decoder->bus,*data,0)) {
i2c_stop(decoder->bus);
UNLOCK_I2C_BUS(decoder->bus);
return -EAGAIN;
}
decoder->reg[subaddr++] = *data++;
}
i2c_stop(decoder->bus);
UNLOCK_I2C_BUS(decoder->bus);
return 0;
}
