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