1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
|
|
#include <linux/config.h>
|
|
#include <asm/io.h>
|
|
#include <asm/mach-au1x00/au1000.h>
|
|
|
|
#ifdef CONFIG_KGDB
|
|
|
|
/*
|
|
* FIXME the user should be able to select the
|
|
* uart to be used for debugging.
|
|
*/
|
|
#define DEBUG_BASE UART_DEBUG_BASE
|
|
/**/
|
|
|
|
/* we need uint32 uint8 */
|
|
/* #include "types.h" */
|
|
typedef unsigned char uint8;
|
|
typedef unsigned int uint32;
|
|
|
|
#define UART16550_BAUD_2400 2400
|
|
#define UART16550_BAUD_4800 4800
|
|
#define UART16550_BAUD_9600 9600
|
|
#define UART16550_BAUD_19200 19200
|
|
#define UART16550_BAUD_38400 38400
|
|
#define UART16550_BAUD_57600 57600
|
|
#define UART16550_BAUD_115200 115200
|
|
|
|
#define UART16550_PARITY_NONE 0
|
|
#define UART16550_PARITY_ODD 0x08
|
|
#define UART16550_PARITY_EVEN 0x18
|
|
#define UART16550_PARITY_MARK 0x28
|
|
#define UART16550_PARITY_SPACE 0x38
|
|
|
|
#define UART16550_DATA_5BIT 0x0
|
|
#define UART16550_DATA_6BIT 0x1
|
|
#define UART16550_DATA_7BIT 0x2
|
|
#define UART16550_DATA_8BIT 0x3
|
|
|
|
#define UART16550_STOP_1BIT 0x0
|
|
#define UART16550_STOP_2BIT 0x4
|
|
|
|
|
|
#define UART_RX 0 /* Receive buffer */
|
|
#define UART_TX 4 /* Transmit buffer */
|
|
#define UART_IER 8 /* Interrupt Enable Register */
|
|
#define UART_IIR 0xC /* Interrupt ID Register */
|
|
#define UART_FCR 0x10 /* FIFO Control Register */
|
|
#define UART_LCR 0x14 /* Line Control Register */
|
|
#define UART_MCR 0x18 /* Modem Control Register */
|
|
#define UART_LSR 0x1C /* Line Status Register */
|
|
#define UART_MSR 0x20 /* Modem Status Register */
|
|
#define UART_CLK 0x28 /* Baud Rat4e Clock Divider */
|
|
#define UART_MOD_CNTRL 0x100 /* Module Control */
|
|
|
|
/* memory-mapped read/write of the port */
|
|
#define UART16550_READ(y) (au_readl(DEBUG_BASE + y) & 0xff)
|
|
#define UART16550_WRITE(y,z) (au_writel(z&0xff, DEBUG_BASE + y))
|
|
|
|
extern unsigned long get_au1x00_uart_baud_base(void);
|
|
extern unsigned long cal_r4koff(void);
|
|
|
|
void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
|
|
{
|
|
|
|
if (UART16550_READ(UART_MOD_CNTRL) != 0x3) {
|
|
UART16550_WRITE(UART_MOD_CNTRL, 3);
|
|
}
|
|
cal_r4koff();
|
|
|
|
/* disable interrupts */
|
|
UART16550_WRITE(UART_IER, 0);
|
|
|
|
/* set up baud rate */
|
|
{
|
|
uint32 divisor;
|
|
|
|
/* set divisor */
|
|
divisor = get_au1x00_uart_baud_base() / baud;
|
|
UART16550_WRITE(UART_CLK, divisor & 0xffff);
|
|
}
|
|
|
|
/* set data format */
|
|
UART16550_WRITE(UART_LCR, (data | parity | stop));
|
|
}
|
|
|
|
static int remoteDebugInitialized = 0;
|
|
|
|
uint8 getDebugChar(void)
|
|
{
|
|
if (!remoteDebugInitialized) {
|
|
remoteDebugInitialized = 1;
|
|
debugInit(UART16550_BAUD_115200,
|
|
UART16550_DATA_8BIT,
|
|
UART16550_PARITY_NONE,
|
|
UART16550_STOP_1BIT);
|
|
}
|
|
|
|
while((UART16550_READ(UART_LSR) & 0x1) == 0);
|
|
return UART16550_READ(UART_RX);
|
|
}
|
|
|
|
|
|
int putDebugChar(uint8 byte)
|
|
{
|
|
// int i;
|
|
|
|
if (!remoteDebugInitialized) {
|
|
remoteDebugInitialized = 1;
|
|
debugInit(UART16550_BAUD_115200,
|
|
UART16550_DATA_8BIT,
|
|
UART16550_PARITY_NONE,
|
|
UART16550_STOP_1BIT);
|
|
}
|
|
|
|
while ((UART16550_READ(UART_LSR)&0x40) == 0);
|
|
UART16550_WRITE(UART_TX, byte);
|
|
//for (i=0;i<0xfff;i++);
|
|
|
|
return 1;
|
|
}
|
|
|
|
#endif
|