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#include <linux/config.h>
#include <linux/types.h>
#include <asm/ibm4xx.h>
#include <linux/kernel.h>
#define LSR_DR 0x01 /* Data ready */
#define LSR_OE 0x02 /* Overrun */
#define LSR_PE 0x04 /* Parity error */
#define LSR_FE 0x08 /* Framing error */
#define LSR_BI 0x10 /* Break */
#define LSR_THRE 0x20 /* Xmit holding register empty */
#define LSR_TEMT 0x40 /* Xmitter empty */
#define LSR_ERR 0x80 /* Error */
#include <platforms/4xx/ibm_ocp.h>
extern struct NS16550* COM_PORTS[];
#ifndef NULL
#define NULL 0x00
#endif
static volatile struct NS16550 *kgdb_debugport = NULL;
volatile struct NS16550 *
NS16550_init(int chan)
{
volatile struct NS16550 *com_port;
int quot;
#ifdef BASE_BAUD
quot = BASE_BAUD / 9600;
#else
quot = 0x000c; /* 0xc = 9600 baud (on a pc) */
#endif
com_port = (struct NS16550 *) COM_PORTS[chan];
com_port->lcr = 0x00;
com_port->ier = 0xFF;
com_port->ier = 0x00;
com_port->lcr = com_port->lcr | 0x80; /* Access baud rate */
com_port->dll = ( quot & 0x00ff ); /* 0xc = 9600 baud */
com_port->dlm = ( quot & 0xff00 ) >> 8;
com_port->lcr = 0x03; /* 8 data, 1 stop, no parity */
com_port->mcr = 0x00; /* RTS/DTR */
com_port->fcr = 0x07; /* Clear & enable FIFOs */
return( com_port );
}
void
NS16550_putc(volatile struct NS16550 *com_port, unsigned char c)
{
while ((com_port->lsr & LSR_THRE) == 0)
;
com_port->thr = c;
return;
}
unsigned char
NS16550_getc(volatile struct NS16550 *com_port)
{
while ((com_port->lsr & LSR_DR) == 0)
;
return (com_port->rbr);
}
unsigned char
NS16550_tstc(volatile struct NS16550 *com_port)
{
return ((com_port->lsr & LSR_DR) != 0);
}
#if defined(CONFIG_KGDB_TTYS0)
#define KGDB_PORT 0
#elif defined(CONFIG_KGDB_TTYS1)
#define KGDB_PORT 1
#elif defined(CONFIG_KGDB_TTYS2)
#define KGDB_PORT 2
#elif defined(CONFIG_KGDB_TTYS3)
#define KGDB_PORT 3
#else
#error "invalid kgdb_tty port"
#endif
void putDebugChar( unsigned char c )
{
if ( kgdb_debugport == NULL )
kgdb_debugport = NS16550_init(KGDB_PORT);
NS16550_putc( kgdb_debugport, c );
}
int getDebugChar( void )
{
if (kgdb_debugport == NULL)
kgdb_debugport = NS16550_init(KGDB_PORT);
return(NS16550_getc(kgdb_debugport));
}
void kgdb_interruptible(int enable)
{
return;
}
void putDebugString(char* str)
{
while (*str != '\0') {
putDebugChar(*str);
str++;
}
putDebugChar('\r');
return;
}
void
kgdb_map_scc(void)
{
printk("kgdb init \n");
kgdb_debugport = NS16550_init(KGDB_PORT);
}
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