3 #include <asm/mach-au1x00/au1000.h>
8 * FIXME the user should be able to select the
9 * uart to be used for debugging.
11 #define DEBUG_BASE UART_DEBUG_BASE
14 /* we need uint32 uint8 */
15 /* #include "types.h" */
16 typedef unsigned char uint8;
17 typedef unsigned int uint32;
19 #define UART16550_BAUD_2400 2400
20 #define UART16550_BAUD_4800 4800
21 #define UART16550_BAUD_9600 9600
22 #define UART16550_BAUD_19200 19200
23 #define UART16550_BAUD_38400 38400
24 #define UART16550_BAUD_57600 57600
25 #define UART16550_BAUD_115200 115200
27 #define UART16550_PARITY_NONE 0
28 #define UART16550_PARITY_ODD 0x08
29 #define UART16550_PARITY_EVEN 0x18
30 #define UART16550_PARITY_MARK 0x28
31 #define UART16550_PARITY_SPACE 0x38
33 #define UART16550_DATA_5BIT 0x0
34 #define UART16550_DATA_6BIT 0x1
35 #define UART16550_DATA_7BIT 0x2
36 #define UART16550_DATA_8BIT 0x3
38 #define UART16550_STOP_1BIT 0x0
39 #define UART16550_STOP_2BIT 0x4
42 #define UART_RX 0 /* Receive buffer */
43 #define UART_TX 4 /* Transmit buffer */
44 #define UART_IER 8 /* Interrupt Enable Register */
45 #define UART_IIR 0xC /* Interrupt ID Register */
46 #define UART_FCR 0x10 /* FIFO Control Register */
47 #define UART_LCR 0x14 /* Line Control Register */
48 #define UART_MCR 0x18 /* Modem Control Register */
49 #define UART_LSR 0x1C /* Line Status Register */
50 #define UART_MSR 0x20 /* Modem Status Register */
51 #define UART_CLK 0x28 /* Baud Rat4e Clock Divider */
52 #define UART_MOD_CNTRL 0x100 /* Module Control */
54 /* memory-mapped read/write of the port */
55 #define UART16550_READ(y) (au_readl(DEBUG_BASE + y) & 0xff)
56 #define UART16550_WRITE(y,z) (au_writel(z&0xff, DEBUG_BASE + y))
58 extern unsigned long get_au1x00_uart_baud_base(void);
59 extern unsigned long cal_r4koff(void);
61 void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
64 if (UART16550_READ(UART_MOD_CNTRL) != 0x3) {
65 UART16550_WRITE(UART_MOD_CNTRL, 3);
69 /* disable interrupts */
70 UART16550_WRITE(UART_IER, 0);
72 /* set up baud rate */
77 divisor = get_au1x00_uart_baud_base() / baud;
78 UART16550_WRITE(UART_CLK, divisor & 0xffff);
82 UART16550_WRITE(UART_LCR, (data | parity | stop));
85 static int remoteDebugInitialized = 0;
87 uint8 getDebugChar(void)
89 if (!remoteDebugInitialized) {
90 remoteDebugInitialized = 1;
91 debugInit(UART16550_BAUD_115200,
93 UART16550_PARITY_NONE,
97 while((UART16550_READ(UART_LSR) & 0x1) == 0);
98 return UART16550_READ(UART_RX);
102 int putDebugChar(uint8 byte)
106 if (!remoteDebugInitialized) {
107 remoteDebugInitialized = 1;
108 debugInit(UART16550_BAUD_115200,
110 UART16550_PARITY_NONE,
111 UART16550_STOP_1BIT);
114 while ((UART16550_READ(UART_LSR)&0x40) == 0);
115 UART16550_WRITE(UART_TX, byte);
116 //for (i=0;i<0xfff;i++);