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path: root/drivers/media/video/au0828/au0828-i2c.c
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Diffstat (limited to 'drivers/media/video/au0828/au0828-i2c.c')
-rw-r--r--drivers/media/video/au0828/au0828-i2c.c72
1 files changed, 39 insertions, 33 deletions
diff --git a/drivers/media/video/au0828/au0828-i2c.c b/drivers/media/video/au0828/au0828-i2c.c
index f9a958d0aef1..13e494365e70 100644
--- a/drivers/media/video/au0828/au0828-i2c.c
+++ b/drivers/media/video/au0828/au0828-i2c.c
@@ -39,13 +39,15 @@ MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
static inline int i2c_slave_did_write_ack(struct i2c_adapter *i2c_adap)
{
struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, REG_201) & 0x08 ? 0 : 1;
+ return au0828_read(dev, AU0828_I2C_STATUS_201) &
+ AU0828_I2C_STATUS_NO_WRITE_ACK ? 0 : 1;
}
static inline int i2c_slave_did_read_ack(struct i2c_adapter *i2c_adap)
{
struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, REG_201) & 0x02 ? 0 : 1;
+ return au0828_read(dev, AU0828_I2C_STATUS_201) &
+ AU0828_I2C_STATUS_NO_READ_ACK ? 0 : 1;
}
static int i2c_wait_read_ack(struct i2c_adapter *i2c_adap)
@@ -67,7 +69,8 @@ static int i2c_wait_read_ack(struct i2c_adapter *i2c_adap)
static inline int i2c_is_read_busy(struct i2c_adapter *i2c_adap)
{
struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, REG_201) & 0x01 ? 0 : 1;
+ return au0828_read(dev, AU0828_I2C_STATUS_201) &
+ AU0828_I2C_STATUS_READ_DONE ? 0 : 1;
}
static int i2c_wait_read_done(struct i2c_adapter *i2c_adap)
@@ -89,7 +92,8 @@ static int i2c_wait_read_done(struct i2c_adapter *i2c_adap)
static inline int i2c_is_write_done(struct i2c_adapter *i2c_adap)
{
struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, REG_201) & 0x04 ? 1 : 0;
+ return au0828_read(dev, AU0828_I2C_STATUS_201) &
+ AU0828_I2C_STATUS_WRITE_DONE ? 1 : 0;
}
static int i2c_wait_write_done(struct i2c_adapter *i2c_adap)
@@ -111,7 +115,8 @@ static int i2c_wait_write_done(struct i2c_adapter *i2c_adap)
static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
{
struct au0828_dev *dev = i2c_adap->algo_data;
- return au0828_read(dev, REG_201) & 0x10 ? 1 : 0;
+ return au0828_read(dev, AU0828_I2C_STATUS_201) &
+ AU0828_I2C_STATUS_BUSY ? 1 : 0;
}
static int i2c_wait_done(struct i2c_adapter *i2c_adap)
@@ -139,19 +144,14 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
dprintk(4, "%s()\n", __func__);
- au0828_write(dev, REG_2FF, 0x01);
+ au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
- /* FIXME: There is a problem with i2c communications with xc5000 that
- requires us to slow down the i2c clock until we have a better
- strategy (such as using the secondary i2c bus to do firmware
- loading */
- if ((msg->addr << 1) == 0xc2)
- au0828_write(dev, REG_202, 0x40);
- else
- au0828_write(dev, REG_202, 0x07);
+ /* Set the I2C clock */
+ au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202,
+ dev->board.i2c_clk_divider);
/* Hardware needs 8 bit addresses */
- au0828_write(dev, REG_203, msg->addr << 1);
+ au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1);
dprintk(4, "SEND: %02x\n", msg->addr);
@@ -163,7 +163,9 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
actual bytes to the bus, just do a read check. This is
consistent with how I saw i2c device checking done in the
USB trace of the Windows driver */
- au0828_write(dev, REG_200, 0x20);
+ au0828_write(dev, AU0828_I2C_TRIGGER_200,
+ AU0828_I2C_TRIGGER_READ);
+
if (!i2c_wait_done(i2c_adap))
return -EIO;
@@ -177,7 +179,7 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
dprintk(4, " %02x\n", msg->buf[i]);
- au0828_write(dev, REG_205, msg->buf[i]);
+ au0828_write(dev, AU0828_I2C_WRITE_FIFO_205, msg->buf[i]);
strobe++;
i++;
@@ -186,9 +188,12 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
/* Strobe the byte into the bus */
if (i < msg->len)
- au0828_write(dev, REG_200, 0x41);
+ au0828_write(dev, AU0828_I2C_TRIGGER_200,
+ AU0828_I2C_TRIGGER_WRITE |
+ AU0828_I2C_TRIGGER_HOLD);
else
- au0828_write(dev, REG_200, 0x01);
+ au0828_write(dev, AU0828_I2C_TRIGGER_200,
+ AU0828_I2C_TRIGGER_WRITE);
/* Reset strobe trigger */
strobe = 0;
@@ -216,25 +221,22 @@ static int i2c_readbytes(struct i2c_adapter *i2c_adap,
dprintk(4, "%s()\n", __func__);
- au0828_write(dev, REG_2FF, 0x01);
+ au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
- /* FIXME: There is a problem with i2c communications with xc5000 that
- requires us to slow down the i2c clock until we have a better
- strategy (such as using the secondary i2c bus to do firmware
- loading */
- if ((msg->addr << 1) == 0xc2)
- au0828_write(dev, REG_202, 0x40);
- else
- au0828_write(dev, REG_202, 0x07);
+ /* Set the I2C clock */
+ au0828_write(dev, AU0828_I2C_CLK_DIVIDER_202,
+ dev->board.i2c_clk_divider);
/* Hardware needs 8 bit addresses */
- au0828_write(dev, REG_203, msg->addr << 1);
+ au0828_write(dev, AU0828_I2C_DEST_ADDR_203, msg->addr << 1);
dprintk(4, " RECV:\n");
/* Deal with i2c_scan */
if (msg->len == 0) {
- au0828_write(dev, REG_200, 0x20);
+ au0828_write(dev, AU0828_I2C_TRIGGER_200,
+ AU0828_I2C_TRIGGER_READ);
+
if (i2c_wait_read_ack(i2c_adap))
return -EIO;
return 0;
@@ -245,14 +247,18 @@ static int i2c_readbytes(struct i2c_adapter *i2c_adap,
i++;
if (i < msg->len)
- au0828_write(dev, REG_200, 0x60);
+ au0828_write(dev, AU0828_I2C_TRIGGER_200,
+ AU0828_I2C_TRIGGER_READ |
+ AU0828_I2C_TRIGGER_HOLD);
else
- au0828_write(dev, REG_200, 0x20);
+ au0828_write(dev, AU0828_I2C_TRIGGER_200,
+ AU0828_I2C_TRIGGER_READ);
if (!i2c_wait_read_done(i2c_adap))
return -EIO;
- msg->buf[i-1] = au0828_read(dev, REG_209) & 0xff;
+ msg->buf[i-1] = au0828_read(dev, AU0828_I2C_READ_FIFO_209) &
+ 0xff;
dprintk(4, " %02x\n", msg->buf[i-1]);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 11:09:51 +0000