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Diffstat (limited to 'arch/arm/mach-pnx4008/serial.c')
-rw-r--r--arch/arm/mach-pnx4008/serial.c69
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);
+}
+