Modified: branches/2009R1/drivers/i2c/busses/i2c-bfin-twi.c (7658 => 7659)
--- branches/2009R1/drivers/i2c/busses/i2c-bfin-twi.c 2009-10-16 03:19:15 UTC (rev 7658)
+++ branches/2009R1/drivers/i2c/busses/i2c-bfin-twi.c 2009-10-16 04:11:06 UTC (rev 7659)
@@ -79,9 +79,9 @@
{P_TWI1_SCL, P_TWI1_SDA, 0},
};
-static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface)
+static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
+ unsigned short twi_int_status)
{
- unsigned short twi_int_status = read_INT_STAT(iface);
unsigned short mast_stat = read_MASTER_STAT(iface);
if (twi_int_status & XMTSERV) {
@@ -109,9 +109,6 @@
(read_MASTER_CTL(iface) | RSTART) & ~MDIR);
}
SSYNC();
- /* Clear status */
- write_INT_STAT(iface, XMTSERV);
- SSYNC();
}
if (twi_int_status & RCVSERV) {
if (iface->readNum > 0) {
@@ -144,12 +141,8 @@
(read_MASTER_CTL(iface) | RSTART) & ~MDIR);
SSYNC();
}
- /* Clear interrupt source */
- write_INT_STAT(iface, RCVSERV);
- SSYNC();
}
if (twi_int_status & MERR) {
- write_INT_STAT(iface, MERR);
write_INT_MASK(iface, 0);
write_MASTER_STAT(iface, 0x3e);
write_MASTER_CTL(iface, 0);
@@ -159,10 +152,6 @@
* results.
*/
if (twi_int_status & MCOMP) {
- write_INT_STAT(iface, MCOMP);
- write_INT_MASK(iface, 0);
- write_MASTER_CTL(iface, 0);
- SSYNC();
/* If it is a quick transfer, only address without data,
* not an err, return 1.
* If address is acknowledged return 1.
@@ -175,8 +164,6 @@
return;
}
if (twi_int_status & MCOMP) {
- write_INT_STAT(iface, MCOMP);
- SSYNC();
if (iface->cur_mode == TWI_I2C_MODE_COMBINED) {
if (iface->readNum == 0) {
/* set the read number to 1 and ask for manual
@@ -251,9 +238,18 @@
{
struct bfin_twi_iface *iface = dev_id;
unsigned long flags;
+ unsigned short twi_int_status;
spin_lock_irqsave(&iface->lock, flags);
- bfin_twi_handle_interrupt(iface);
+ while (1) {
+ twi_int_status = read_INT_STAT(iface);
+ if (!twi_int_status)
+ break;
+ /* Clear interrupt status */
+ write_INT_STAT(iface, twi_int_status);
+ SSYNC();
+ bfin_twi_handle_interrupt(iface, twi_int_status);
+ }
spin_unlock_irqrestore(&iface->lock, flags);
return IRQ_HANDLED;
}
