[PATCH/2.6.17-rc4 8/10] Add tsi108 8250 serial support
Zang Roy-r61911
tie-fei.zang at freescale.com
Wed May 17 20:14:27 EST 2006
This patch contains changes to the serial device driver specific for integrated
serial port in Tsi108 Host Bridge.
Signed-off-by: Alexandre Bounine <alexandreb at tundra.com>
Signed-off-by: Roy Zang <tie-fei.zang at freescale.com>
>From nobody Mon Sep 17 00:00:00 2001
From: roy zang <tie-fei.zang at freescale.com>
Date: Tue May 16 15:26:02 2006 +0800
Subject: [PATCH] Add tsi108 serial support
---
drivers/serial/8250.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
6cb950357e9970afa671d59f172dbc4b03f11560
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index bbf78aa..c12f516 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -723,7 +723,9 @@ static int broken_efr(struct uart_8250_p
static void autoconfig_16550a(struct uart_8250_port *up)
{
unsigned char status1, status2;
+#ifndef CONFIG_TSI108_BRIDGE
unsigned int iersave;
+#endif
up->port.type = PORT_16550A;
up->capabilities |= UART_CAP_FIFO;
@@ -833,6 +835,7 @@ static void autoconfig_16550a(struct uar
* trying to write and read a 1 just to make sure it's not
* already a 1 and maybe locked there before we even start start.
*/
+#ifndef CONFIG_TSI108_BRIDGE
iersave = serial_in(up, UART_IER);
serial_outp(up, UART_IER, iersave & ~UART_IER_UUE);
if (!(serial_in(up, UART_IER) & UART_IER_UUE)) {
@@ -859,6 +862,7 @@ static void autoconfig_16550a(struct uar
DEBUG_AUTOCONF("Couldn't force IER_UUE to 0 ");
}
serial_outp(up, UART_IER, iersave);
+#endif
}
/*
@@ -1348,7 +1352,12 @@ static irqreturn_t serial8250_interrupt(
up = list_entry(l, struct uart_8250_port, list);
+#ifdef CONFIG_TSI108_BRIDGE /* for TSI108_REV_Z1 errata U2 */
+ /* read IIR as part of 32-bit word */
+ iir = (in_be32((u32 *)(up->port.membase + UART_RX)) >> 8) & 0xff;
+#else
iir = serial_in(up, UART_IIR);
+#endif
if (!(iir & UART_IIR_NO_INT)) {
serial8250_handle_port(up, regs);
@@ -1529,7 +1538,9 @@ static int serial8250_startup(struct uar
{
struct uart_8250_port *up = (struct uart_8250_port *)port;
unsigned long flags;
+#ifndef CONFIG_TSI108_BRIDGE
unsigned char lsr, iir;
+#endif
int retval;
up->capabilities = uart_config[up->port.type].flags;
@@ -1567,7 +1578,9 @@ #endif
*/
(void) serial_inp(up, UART_LSR);
(void) serial_inp(up, UART_RX);
+#ifndef CONFIG_TSI108_BRIDGE /* for TSI108_REV_Z1 errata U2 */
(void) serial_inp(up, UART_IIR);
+#endif
(void) serial_inp(up, UART_MSR);
/*
@@ -1634,6 +1647,7 @@ #endif
serial8250_set_mctrl(&up->port, up->port.mctrl);
+#ifndef CONFIG_TSI108_BRIDGE
/*
* Do a quick test to see if we receive an
* interrupt when we enable the TX irq.
@@ -1652,6 +1666,7 @@ #endif
} else {
up->bugs &= ~UART_BUG_TXEN;
}
+#endif
spin_unlock_irqrestore(&up->port.lock, flags);
@@ -1678,7 +1693,9 @@ #endif
*/
(void) serial_inp(up, UART_LSR);
(void) serial_inp(up, UART_RX);
+#ifndef CONFIG_TSI108_BRIDGE /* for TSI108_REV_Z1 errata U2 */
(void) serial_inp(up, UART_IIR);
+#endif
(void) serial_inp(up, UART_MSR);
return 0;
--
1.3.0
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