diff options
Diffstat (limited to 'drivers/media/video/au0828/au0828-i2c.c')
| -rw-r--r-- | drivers/media/video/au0828/au0828-i2c.c | 72 |
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]); } |