/*
* Interrupt service routine. This gets called whenever an I2C interrupt
* occurs.
*/
static irqreturn_t
i2c_davinci_isr(int this_irq, void *dev_id, struct pt_regs *reg)
{
struct i2c_davinci_device *dev = dev_id;
u32 stat;
DEB1("i2c_davinci_isr()\n");
while ((stat = dev->regs->icivr) != 0) {
// printk( "\t%02x\n", stat );
switch (stat) {
case DAVINCI_I2C_ICIVR_INTCODE_AL:
dev->cmd_err |= DAVINCI_I2C_ICSTR_AL_MASK;
i2c_davinci_complete_cmd(dev);
break;
case DAVINCI_I2C_ICIVR_INTCODE_NACK:
dev->cmd_err |= DAVINCI_I2C_ICSTR_NACK_MASK;
i2c_davinci_complete_cmd(dev);
break;
case DAVINCI_I2C_ICIVR_INTCODE_RAR:
dev->regs->icstr |= DAVINCI_I2C_ICSTR_ARDY_MASK;
i2c_davinci_complete_cmd( dev );
break;
case DAVINCI_I2C_ICIVR_INTCODE_RDR:
if (dev->buf_len) {
*dev->buf++ = dev->regs->icdrr;
dev->buf_len--;
if (dev->buf_len) {
continue;
} else {
dev->regs->icimr &=
~DAVINCI_I2C_ICIMR_ICRRDY_MASK;
}
}
break;
case DAVINCI_I2C_ICIVR_INTCODE_TDR:
if (dev->buf_len) {
dev->regs->icdxr = *dev->buf++;
dev->buf_len--;
if (dev->buf_len)
continue;
else {
dev->regs->icimr &=
~DAVINCI_I2C_ICIMR_ICXRDY_MASK;
/* If no stop bit, then we are done ... */
if ( !(dev->regs->icmdr & DAVINCI_I2C_ICMDR_STP_MASK) ) {
i2c_davinci_complete_cmd( dev );
}
}
}
break;
case DAVINCI_I2C_ICIVR_INTCODE_SCD:
dev->regs->icstr |= DAVINCI_I2C_ICSTR_SCD_MASK;
i2c_davinci_complete_cmd(dev);
break;
case DAVINCI_I2C_ICIVR_INTCODE_AAS:
i2c_warn("Address as slave interrupt");
break;
default:
printk( "Unknown status 0x%04x\n", stat );
break;
} /* switch */
} /* while */
return IRQ_HANDLED;
}
/*
* Interrupt service routine. This gets called whenever an I2C interrupt
* occurs.
*/
static irqreturn_t
i2c_davinci_isr(int this_irq, void *dev_id, struct pt_regs *reg)
{
struct i2c_davinci_device *dev = dev_id;
u32 stat;
DEB1("i2c_davinci_isr()");
while ((stat = dev->regs->icivr) != 0) {
switch (stat) {
case DAVINCI_I2C_ICIVR_INTCODE_AL:
dev->cmd_err |= DAVINCI_I2C_ICSTR_AL_MASK;
i2c_warn("i2c: AL detected");
i2c_davinci_complete_cmd(dev);
break;
case DAVINCI_I2C_ICIVR_INTCODE_NACK:
dev->cmd_err |= DAVINCI_I2C_ICSTR_NACK_MASK;
i2c_warn("i2c: NACK detected");
i2c_davinci_complete_cmd(dev);
break;
case DAVINCI_I2C_ICIVR_INTCODE_RAR:
dev->regs->icstr |= DAVINCI_I2C_ICSTR_ARDY_MASK;
i2c_davinci_complete_cmd(dev);
break;
case DAVINCI_I2C_ICIVR_INTCODE_RDR:
if (dev->buf_len) {
*dev->buf++ = dev->regs->icdrr;
dev->buf_len--;
if (dev->buf_len) {
continue;
} else {
dev->regs->icimr &=
~DAVINCI_I2C_ICIMR_ICRRDY_MASK;
}
}
break;
case DAVINCI_I2C_ICIVR_INTCODE_TDR:
if (dev->buf_len) {
dev->regs->icdxr = *dev->buf++;
dev->buf_len--;
if (dev->buf_len)
continue;
else {
dev->regs->icimr &=
~DAVINCI_I2C_ICIMR_ICXRDY_MASK;
}
}
break;
case DAVINCI_I2C_ICIVR_INTCODE_SCD:
dev->regs->icstr |= DAVINCI_I2C_ICSTR_SCD_MASK;
i2c_davinci_complete_cmd(dev);
break;
case DAVINCI_I2C_ICIVR_INTCODE_AAS:
i2c_warn("i2c: AAS detected");
break;
default:
i2c_warn("i2c: unknown status: %d", stat);
break;
} /* switch */
} /* while */
return IRQ_HANDLED;
}
