1/*
2 *  linux/arch/arm/mach-pnx4008/serial.c
3 *
4 *  PNX4008 UART initialization
5 *
6 *  Copyright:	MontaVista Software Inc. (c) 2005
7 *
8 *  This program is free software; you can redistribute it and/or modify
9 *  it under the terms of the GNU General Public License version 2 as
10 *  published by the Free Software Foundation.
11 */
12
13#include <linux/kernel.h>
14#include <linux/types.h>
15
16#include <asm/io.h>
17
18#include <asm/arch/platform.h>
19#include <asm/hardware.h>
20
21#include <linux/serial_core.h>
22#include <linux/serial_reg.h>
23#include <asm/arch/gpio.h>
24
25#include <asm/arch/clock.h>
26
27#define UART_3		0
28#define UART_4		1
29#define UART_5		2
30#define UART_6		3
31#define UART_UNKNOWN	(-1)
32
33#define UART3_BASE_VA	IO_ADDRESS(PNX4008_UART3_BASE)
34#define UART4_BASE_VA	IO_ADDRESS(PNX4008_UART4_BASE)
35#define UART5_BASE_VA	IO_ADDRESS(PNX4008_UART5_BASE)
36#define UART6_BASE_VA	IO_ADDRESS(PNX4008_UART6_BASE)
37
38#define UART_FCR_OFFSET		8
39#define UART_FIFO_SIZE		64
40
41void pnx4008_uart_init(void)
42{
43	u32 tmp;
44	int i = UART_FIFO_SIZE;
45
46	__raw_writel(0xC1, UART5_BASE_VA + UART_FCR_OFFSET);
47	__raw_writel(0xC1, UART3_BASE_VA + UART_FCR_OFFSET);
48
49	/* Send a NULL to fix the UART HW bug */
50	__raw_writel(0x00, UART5_BASE_VA);
51	__raw_writel(0x00, UART3_BASE_VA);
52
53	while (i--) {
54		tmp = __raw_readl(UART5_BASE_VA);
55		tmp = __raw_readl(UART3_BASE_VA);
56	}
57	__raw_writel(0, UART5_BASE_VA + UART_FCR_OFFSET);
58	__raw_writel(0, UART3_BASE_VA + UART_FCR_OFFSET);
59
60	/* setup wakeup interrupt */
61	start_int_set_rising_edge(SE_U3_RX_INT);
62	start_int_ack(SE_U3_RX_INT);
63	start_int_umask(SE_U3_RX_INT);
64
65	start_int_set_rising_edge(SE_U5_RX_INT);
66	start_int_ack(SE_U5_RX_INT);
67	start_int_umask(SE_U5_RX_INT);
68}
69