1
2#include <linux/config.h>
3#include <asm/io.h>
4#include <asm/au1000.h>
5
6#ifdef CONFIG_REMOTE_DEBUG
7
8#define	DEBUG_BASE  UART2_ADDR
9/**/
10
11/* we need uint32 uint8 */
12/* #include "types.h" */
13typedef         unsigned char uint8;
14typedef         unsigned int  uint32;
15
16#define         UART16550_BAUD_2400             2400
17#define         UART16550_BAUD_4800             4800
18#define         UART16550_BAUD_9600             9600
19#define         UART16550_BAUD_19200            19200
20#define         UART16550_BAUD_38400            38400
21#define         UART16550_BAUD_57600            57600
22#define         UART16550_BAUD_115200           115200
23
24#define         UART16550_PARITY_NONE           0
25#define         UART16550_PARITY_ODD            0x08
26#define         UART16550_PARITY_EVEN           0x18
27#define         UART16550_PARITY_MARK           0x28
28#define         UART16550_PARITY_SPACE          0x38
29
30#define         UART16550_DATA_5BIT             0x0
31#define         UART16550_DATA_6BIT             0x1
32#define         UART16550_DATA_7BIT             0x2
33#define         UART16550_DATA_8BIT             0x3
34
35#define         UART16550_STOP_1BIT             0x0
36#define         UART16550_STOP_2BIT             0x4
37
38
39#define UART_RX		0	/* Receive buffer */
40#define UART_TX		4	/* Transmit buffer */
41#define UART_IER	8	/* Interrupt Enable Register */
42#define UART_IIR	0xC	/* Interrupt ID Register */
43#define UART_FCR	0x10	/* FIFO Control Register */
44#define UART_LCR	0x14	/* Line Control Register */
45#define UART_MCR	0x18	/* Modem Control Register */
46#define UART_LSR	0x1C	/* Line Status Register */
47#define UART_MSR	0x20	/* Modem Status Register */
48#define UART_CLK	0x28	/* Baud Rat4e Clock Divider */
49#define UART_MOD_CNTRL	0x100	/* Module Control */
50
51/* memory-mapped read/write of the port */
52#define UART16550_READ(y)    (au_readl(DEBUG_BASE + y) & 0xff)
53#define UART16550_WRITE(y,z) (au_writel(z&0xff, DEBUG_BASE + y))
54
55extern unsigned long get_au1x00_uart_baud_base(void);
56extern unsigned long cal_r4koff(void);
57
58void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
59{
60
61	if (UART16550_READ(UART_MOD_CNTRL) != 0x3) {
62		UART16550_WRITE(UART_MOD_CNTRL, 3);
63	}
64	cal_r4koff();
65
66	/* disable interrupts */
67	UART16550_WRITE(UART_IER, 0);
68
69	/* set up baud rate */
70	{
71		uint32 divisor;
72
73		/* set divisor */
74		divisor = get_au1x00_uart_baud_base() / baud;
75		UART16550_WRITE(UART_CLK, divisor & 0xffff);
76	}
77
78	/* set data format */
79	UART16550_WRITE(UART_LCR, (data | parity | stop));
80}
81
82static int remoteDebugInitialized = 0;
83
84uint8 getDebugChar(void)
85{
86	if (!remoteDebugInitialized) {
87		remoteDebugInitialized = 1;
88		debugInit(UART16550_BAUD_115200,
89			  UART16550_DATA_8BIT,
90			  UART16550_PARITY_NONE,
91			  UART16550_STOP_1BIT);
92	}
93
94	while((UART16550_READ(UART_LSR) & 0x1) == 0);
95	return UART16550_READ(UART_RX);
96}
97
98
99int putDebugChar(uint8 byte)
100{
101//	int i;
102
103	if (!remoteDebugInitialized) {
104		remoteDebugInitialized = 1;
105		debugInit(UART16550_BAUD_115200,
106			  UART16550_DATA_8BIT,
107			  UART16550_PARITY_NONE,
108			  UART16550_STOP_1BIT);
109	}
110
111	while ((UART16550_READ(UART_LSR)&0x40) == 0);
112	UART16550_WRITE(UART_TX, byte);
113	//for (i=0;i<0xfff;i++);
114
115	return 1;
116}
117
118#endif
119