1 #include <linux/config.h>
5 #include <asm/serial.h> /* For the serial port location and base baud */
9 typedef unsigned char uint8
;
10 typedef unsigned int uint32
;
12 /* --- END OF CONFIG --- */
14 #define UART16550_BAUD_2400 2400
15 #define UART16550_BAUD_4800 4800
16 #define UART16550_BAUD_9600 9600
17 #define UART16550_BAUD_19200 19200
18 #define UART16550_BAUD_38400 38400
19 #define UART16550_BAUD_57600 57600
20 #define UART16550_BAUD_115200 115200
22 #define UART16550_PARITY_NONE 0
23 #define UART16550_PARITY_ODD 0x08
24 #define UART16550_PARITY_EVEN 0x18
25 #define UART16550_PARITY_MARK 0x28
26 #define UART16550_PARITY_SPACE 0x38
28 #define UART16550_DATA_5BIT 0x0
29 #define UART16550_DATA_6BIT 0x1
30 #define UART16550_DATA_7BIT 0x2
31 #define UART16550_DATA_8BIT 0x3
33 #define UART16550_STOP_1BIT 0x0
34 #define UART16550_STOP_2BIT 0x4
36 /* ----------------------------------------------------- */
40 /* [jsun] we use the second serial port for kdb */
41 #define BASE OCELOT_SERIAL1_BASE
42 #define MAX_BAUD OCELOT_BASE_BAUD
44 /* === END OF CONFIG === */
49 #define OFS_RCV_BUFFER 0
50 #define OFS_TRANS_HOLD 0
51 #define OFS_SEND_BUFFER 0
52 #define OFS_INTR_ENABLE (1*REG_OFFSET)
53 #define OFS_INTR_ID (2*REG_OFFSET)
54 #define OFS_DATA_FORMAT (3*REG_OFFSET)
55 #define OFS_LINE_CONTROL (3*REG_OFFSET)
56 #define OFS_MODEM_CONTROL (4*REG_OFFSET)
57 #define OFS_RS232_OUTPUT (4*REG_OFFSET)
58 #define OFS_LINE_STATUS (5*REG_OFFSET)
59 #define OFS_MODEM_STATUS (6*REG_OFFSET)
60 #define OFS_RS232_INPUT (6*REG_OFFSET)
61 #define OFS_SCRATCH_PAD (7*REG_OFFSET)
63 #define OFS_DIVISOR_LSB (0*REG_OFFSET)
64 #define OFS_DIVISOR_MSB (1*REG_OFFSET)
67 /* memory-mapped read/write of the port */
68 #define UART16550_READ(y) (*((volatile uint8*)(BASE + y)))
69 #define UART16550_WRITE(y, z) ((*((volatile uint8*)(BASE + y))) = z)
71 void debugInit(uint32 baud
, uint8 data
, uint8 parity
, uint8 stop
)
73 /* disable interrupts */
74 UART16550_WRITE(OFS_INTR_ENABLE
, 0);
76 /* set up baud rate */
81 UART16550_WRITE(OFS_LINE_CONTROL
, 0x80);
84 divisor
= MAX_BAUD
/ baud
;
85 UART16550_WRITE(OFS_DIVISOR_LSB
, divisor
& 0xff);
86 UART16550_WRITE(OFS_DIVISOR_MSB
, (divisor
& 0xff00) >> 8);
89 UART16550_WRITE(OFS_LINE_CONTROL
, 0x0);
93 UART16550_WRITE(OFS_DATA_FORMAT
, data
| parity
| stop
);
96 static int remoteDebugInitialized
= 0;
98 uint8
getDebugChar(void)
100 if (!remoteDebugInitialized
) {
101 remoteDebugInitialized
= 1;
102 debugInit(UART16550_BAUD_38400
,
104 UART16550_PARITY_NONE
, UART16550_STOP_1BIT
);
107 while ((UART16550_READ(OFS_LINE_STATUS
) & 0x1) == 0);
108 return UART16550_READ(OFS_RCV_BUFFER
);
112 int putDebugChar(uint8 byte
)
114 if (!remoteDebugInitialized
) {
115 remoteDebugInitialized
= 1;
116 debugInit(UART16550_BAUD_38400
,
118 UART16550_PARITY_NONE
, UART16550_STOP_1BIT
);
121 while ((UART16550_READ(OFS_LINE_STATUS
) & 0x20) == 0);
122 UART16550_WRITE(OFS_SEND_BUFFER
, byte
);