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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.c110
1 files changed, 60 insertions, 50 deletions
diff --git a/drivers/media/video/au0828/au0828-i2c.c b/drivers/media/video/au0828/au0828-i2c.c
index d618fbaade1b..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 +144,42 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
dprintk(4, "%s()\n", __func__);
- au0828_write(dev, REG_2FF, 0x01);
- au0828_write(dev, REG_202, 0x07);
+ au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
+
+ /* 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);
+ /* Deal with i2c_scan */
+ if (msg->len == 0) {
+ /* The analog tuner detection code makes use of the SMBUS_QUICK
+ message (which involves a zero length i2c write). To avoid
+ checking the status register when we didn't strobe out any
+ 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, AU0828_I2C_TRIGGER_200,
+ AU0828_I2C_TRIGGER_READ);
+
+ if (!i2c_wait_done(i2c_adap))
+ return -EIO;
+
+ if (i2c_wait_read_ack(i2c_adap))
+ return -EIO;
+
+ return 0;
+ }
+
for (i = 0; i < msg->len;) {
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++;
@@ -160,9 +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;
@@ -190,17 +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, REG_202, 0x07);
+ au0828_write(dev, AU0828_I2C_MULTIBYTE_MODE_2FF, 0x01);
+
+ /* 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;
@@ -211,14 +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]);
}
@@ -265,33 +305,6 @@ err:
return retval;
}
-static int attach_inform(struct i2c_client *client)
-{
- dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
- client->driver->driver.name, client->addr, client->name);
-
- if (!client->driver->command)
- return 0;
-
- return 0;
-}
-
-static int detach_inform(struct i2c_client *client)
-{
- dprintk(1, "i2c detach [client=%s]\n", client->name);
-
- return 0;
-}
-
-void au0828_call_i2c_clients(struct au0828_dev *dev,
- unsigned int cmd, void *arg)
-{
- if (dev->i2c_rc != 0)
- return;
-
- i2c_clients_command(&dev->i2c_adap, cmd, arg);
-}
-
static u32 au0828_functionality(struct i2c_adapter *adap)
{
return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
@@ -309,9 +322,6 @@ static struct i2c_adapter au0828_i2c_adap_template = {
.owner = THIS_MODULE,
.id = I2C_HW_B_AU0828,
.algo = &au0828_i2c_algo_template,
- .class = I2C_CLASS_TV_ANALOG,
- .client_register = attach_inform,
- .client_unregister = detach_inform,
};
static struct i2c_client au0828_i2c_client_template = {
@@ -356,9 +366,9 @@ int au0828_i2c_register(struct au0828_dev *dev)
strlcpy(dev->i2c_adap.name, DRIVER_NAME,
sizeof(dev->i2c_adap.name));
- dev->i2c_algo.data = dev;
+ dev->i2c_adap.algo = &dev->i2c_algo;
dev->i2c_adap.algo_data = dev;
- i2c_set_adapdata(&dev->i2c_adap, dev);
+ i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
i2c_add_adapter(&dev->i2c_adap);
dev->i2c_client.adapter = &dev->i2c_adap;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.