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