From b88acf65abec97a9b44c42d921c930c4d62d7b5e Mon Sep 17 00:00:00 2001 From: Thomas Andrews Date: Sat, 11 Nov 2006 00:09:25 +0100 Subject: Fix the scx200_acb state machine: * Nack was sent one byte too late on reads >= 2 bytes. * Stop bit was set one byte too late on reads. Signed-off-by: Jean Delvare Signed-off-by: Adrian Bunk --- drivers/i2c/busses/scx200_acb.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c index ad44dd5359ae..e28fb6973e5e 100644 --- a/drivers/i2c/busses/scx200_acb.c +++ b/drivers/i2c/busses/scx200_acb.c @@ -178,21 +178,21 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status) break; case state_read: - /* Set ACK if receiving the last byte */ - if (iface->len == 1) + /* Set ACK if _next_ byte will be the last one */ + if (iface->len == 2) outb(inb(ACBCTL1) | ACBCTL1_ACK, ACBCTL1); else outb(inb(ACBCTL1) & ~ACBCTL1_ACK, ACBCTL1); - *iface->ptr++ = inb(ACBSDA); - --iface->len; - - if (iface->len == 0) { + if (iface->len == 1) { iface->result = 0; iface->state = state_idle; outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1); } + *iface->ptr++ = inb(ACBSDA); + --iface->len; + break; case state_write: -- cgit v1.2.3