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yaml
---
r: 250846
b: refs/heads/master
c: 5535534
h: refs/heads/master
v: v3
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Virupax Sadashivpetimath authored and Ben Dooks committed May 24, 2011
1 parent 22b5c59 commit 2b0ea23
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Showing 2 changed files with 27 additions and 14 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: ebd10e0783d9fb92a147e60902e22c2d3f3ad69d
refs/heads/master: 553553413a6abdda220a697ef439ba2f4b1d4a7c
39 changes: 26 additions & 13 deletions trunk/drivers/i2c/busses/i2c-nomadik.c
Original file line number Diff line number Diff line change
Expand Up @@ -447,6 +447,24 @@ static int read_i2c(struct nmk_i2c_dev *dev)
return status;
}

static void fill_tx_fifo(struct nmk_i2c_dev *dev, int no_bytes)
{
int count;

for (count = (no_bytes - 2);
(count > 0) &&
(dev->cli.count != 0);
count--) {
/* write to the Tx FIFO */
writeb(*dev->cli.buffer,
dev->virtbase + I2C_TFR);
dev->cli.buffer++;
dev->cli.count--;
dev->cli.xfer_bytes++;
}

}

/**
* write_i2c() - Write data to I2C client.
* @dev: private data of I2C Driver
Expand Down Expand Up @@ -474,8 +492,13 @@ static int write_i2c(struct nmk_i2c_dev *dev)
init_completion(&dev->xfer_complete);

/* enable interrupts by settings the masks */
irq_mask = (I2C_IT_TXFNE | I2C_IT_TXFOVR |
I2C_IT_MAL | I2C_IT_BERR);
irq_mask = (I2C_IT_TXFOVR | I2C_IT_MAL | I2C_IT_BERR);

/* Fill the TX FIFO with transmit data */
fill_tx_fifo(dev, MAX_I2C_FIFO_THRESHOLD);

if (dev->cli.count != 0)
irq_mask |= I2C_IT_TXFNE;

/*
* check if we want to transfer a single or multiple bytes, if so
Expand Down Expand Up @@ -702,17 +725,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
*/
disable_interrupts(dev, I2C_IT_TXFNE);
} else {
for (count = (MAX_I2C_FIFO_THRESHOLD - tft - 2);
(count > 0) &&
(dev->cli.count != 0);
count--) {
/* write to the Tx FIFO */
writeb(*dev->cli.buffer,
dev->virtbase + I2C_TFR);
dev->cli.buffer++;
dev->cli.count--;
dev->cli.xfer_bytes++;
}
fill_tx_fifo(dev, (MAX_I2C_FIFO_THRESHOLD - tft));
/*
* if done, close the transfer by disabling the
* corresponding TXFNE interrupt
Expand Down

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