1
2#include <asm/io.h>
3#include <asm/mach-au1x00/au1000.h>
4
5#ifdef CONFIG_KGDB
6
7#define DEBUG_BASE  UART_DEBUG_BASE
8/**/
9
10/* we need uint32 uint8 */
11/* #include "types.h" */
12typedef         unsigned char uint8;
13typedef         unsigned int  uint32;
14
15#define         UART16550_BAUD_2400             2400
16#define         UART16550_BAUD_4800             4800
17#define         UART16550_BAUD_9600             9600
18#define         UART16550_BAUD_19200            19200
19#define         UART16550_BAUD_38400            38400
20#define         UART16550_BAUD_57600            57600
21#define         UART16550_BAUD_115200           115200
22
23#define         UART16550_PARITY_NONE           0
24#define         UART16550_PARITY_ODD            0x08
25#define         UART16550_PARITY_EVEN           0x18
26#define         UART16550_PARITY_MARK           0x28
27#define         UART16550_PARITY_SPACE          0x38
28
29#define         UART16550_DATA_5BIT             0x0
30#define         UART16550_DATA_6BIT             0x1
31#define         UART16550_DATA_7BIT             0x2
32#define         UART16550_DATA_8BIT             0x3
33
34#define         UART16550_STOP_1BIT             0x0
35#define         UART16550_STOP_2BIT             0x4
36
37
38#define UART_RX		0	/* Receive buffer */
39#define UART_TX		4	/* Transmit buffer */
40#define UART_IER	8	/* Interrupt Enable Register */
41#define UART_IIR	0xC	/* Interrupt ID Register */
42#define UART_FCR	0x10	/* FIFO Control Register */
43#define UART_LCR	0x14	/* Line Control Register */
44#define UART_MCR	0x18	/* Modem Control Register */
45#define UART_LSR	0x1C	/* Line Status Register */
46#define UART_MSR	0x20	/* Modem Status Register */
47#define UART_CLK	0x28	/* Baud Rat4e Clock Divider */
48#define UART_MOD_CNTRL	0x100	/* Module Control */
49
50/* memory-mapped read/write of the port */
51#define UART16550_READ(y)    (au_readl(DEBUG_BASE + y) & 0xff)
52#define UART16550_WRITE(y,z) (au_writel(z&0xff, DEBUG_BASE + y))
53
54extern unsigned long get_au1x00_uart_baud_base(void);
55extern unsigned long cal_r4koff(void);
56
57void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
58{
59
60	if (UART16550_READ(UART_MOD_CNTRL) != 0x3) {
61		UART16550_WRITE(UART_MOD_CNTRL, 3);
62	}
63	cal_r4koff();
64
65	/* disable interrupts */
66	UART16550_WRITE(UART_IER, 0);
67
68	/* set up baud rate */
69	{
70		uint32 divisor;
71
72		/* set divisor */
73		divisor = get_au1x00_uart_baud_base() / baud;
74		UART16550_WRITE(UART_CLK, divisor & 0xffff);
75	}
76
77	/* set data format */
78	UART16550_WRITE(UART_LCR, (data | parity | stop));
79}
80
81static int remoteDebugInitialized = 0;
82
83uint8 getDebugChar(void)
84{
85	if (!remoteDebugInitialized) {
86		remoteDebugInitialized = 1;
87		debugInit(UART16550_BAUD_115200,
88			  UART16550_DATA_8BIT,
89			  UART16550_PARITY_NONE,
90			  UART16550_STOP_1BIT);
91	}
92
93	while((UART16550_READ(UART_LSR) & 0x1) == 0);
94	return UART16550_READ(UART_RX);
95}
96
97
98int putDebugChar(uint8 byte)
99{
100//	int i;
101
102	if (!remoteDebugInitialized) {
103		remoteDebugInitialized = 1;
104		debugInit(UART16550_BAUD_115200,
105			  UART16550_DATA_8BIT,
106			  UART16550_PARITY_NONE,
107			  UART16550_STOP_1BIT);
108	}
109
110	while ((UART16550_READ(UART_LSR)&0x40) == 0);
111	UART16550_WRITE(UART_TX, byte);
112	//for (i=0;i<0xfff;i++);
113
114	return 1;
115}
116
117#endif
118