[ARM] 3466/1: [2/3] Support for Philips PNX4008 platform: chip support

Patch from Vitaly Wool

This patch adds basic chip support for PNX4008 ARM platform.
It's basically the same as the previous one, but with the rmk's
comments taken into account.

Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: Dmitry Pervushin <dpervushin@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 69 insertions, 0 deletions

diff --git a/arch/arm/mach-pnx4008/serial.c b/arch/arm/mach-pnx4008/serial.c
new file mode 100644
index 000000000000..2e1e04cc048c
--- /dev/null
+++ b/arch/arm/mach-pnx4008/serial.c
@@ -0,0 +1,69 @@
+/*
+ *  linux/arch/arm/mach-pnx4008/serial.c
+ *
+ *  PNX4008 UART initialization
+ *
+ *  Copyright:  MontaVista Software Inc. (c) 2005
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+
+#include <asm/arch/platform.h>
+#include <asm/arch/hardware.h>
+
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+#include <asm/arch/pm.h>
+
+#include <asm/arch/clock.h>
+
+#define UART_3          0
+#define UART_4          1
+#define UART_5          2
+#define UART_6          3
+#define UART_UNKNOWN    (-1)
+
+#define UART3_BASE_VA   IO_ADDRESS(PNX4008_UART3_BASE)
+#define UART4_BASE_VA   IO_ADDRESS(PNX4008_UART4_BASE)
+#define UART5_BASE_VA   IO_ADDRESS(PNX4008_UART5_BASE)
+#define UART6_BASE_VA   IO_ADDRESS(PNX4008_UART6_BASE)
+
+#define UART_FCR_OFFSET         8
+#define UART_FIFO_SIZE          64
+
+void pnx4008_uart_init(void)
+{
+        u32 tmp;
+        int i = UART_FIFO_SIZE;
+
+        __raw_writel(0xC1, UART5_BASE_VA + UART_FCR_OFFSET);
+        __raw_writel(0xC1, UART3_BASE_VA + UART_FCR_OFFSET);
+
+        /* Send a NULL to fix the UART HW bug */
+        __raw_writel(0x00, UART5_BASE_VA);
+        __raw_writel(0x00, UART3_BASE_VA);
+
+        while (i--) {
+                tmp = __raw_readl(UART5_BASE_VA);
+                tmp = __raw_readl(UART3_BASE_VA);
+        }
+        __raw_writel(0, UART5_BASE_VA + UART_FCR_OFFSET);
+        __raw_writel(0, UART3_BASE_VA + UART_FCR_OFFSET);
+
+        /* setup wakeup interrupt */
+        start_int_set_rising_edge(SE_U3_RX_INT);
+        start_int_ack(SE_U3_RX_INT);
+        start_int_umask(SE_U3_RX_INT);
+
+        start_int_set_rising_edge(SE_U5_RX_INT);
+        start_int_ack(SE_U5_RX_INT);
+        start_int_umask(SE_U5_RX_INT);
+}
+