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/*
* linux/arch/sh/kernel/setup_7751se.c
*
* Copyright (C) 2000 Kazumoto Kojima
*
* Hitachi SolutionEngine Support.
*
* Modified for 7751 Solution Engine by
* Ian da Silva and Jeremy Siegel, 2001.
*/
#include <linux/init.h>
#include <asm/machvec.h>
#include <asm/se7751.h>
#include <asm/io.h>
void heartbeat_7751se(void);
void init_7751se_IRQ(void);
#ifdef CONFIG_SH_KGDB
#include <asm/kgdb.h>
static int kgdb_uart_setup(void);
static struct kgdb_sermap kgdb_uart_sermap =
{ "ttyS", 0, kgdb_uart_setup, NULL };
#endif
/*
* Initialize the board
*/
static void __init sh7751se_setup(char **cmdline_p)
{
/* Call init_smsc() replacement to set up SuperIO. */
/* XXX: RTC setting comes here */
#ifdef CONFIG_SH_KGDB
kgdb_register_sermap(&kgdb_uart_sermap);
#endif
}
/*********************************************************************
* Currently a hack (e.g. does not interact well w/serial.c, lots of *
* hardcoded stuff) but may be useful if SCI/F needs debugging. *
* Mostly copied from x86 code (see files asm-i386/kgdb_local.h and *
* arch/i386/lib/kgdb_serial.c). *
*********************************************************************/
#ifdef CONFIG_SH_KGDB
#include <linux/types.h>
#include <linux/serial.h>
#include <linux/serialP.h>
#include <linux/serial_reg.h>
#define COM1_PORT 0x3f8 /* Base I/O address */
#define COM1_IRQ 4 /* IRQ not used yet */
#define COM2_PORT 0x2f8 /* Base I/O address */
#define COM2_IRQ 3 /* IRQ not used yet */
#define SB_CLOCK 1843200 /* Serial baud clock */
#define SB_BASE (SB_CLOCK/16)
#define SB_MCR UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS
struct uart_port {
int base;
};
#define UART_NPORTS 2
struct uart_port uart_ports[] = {
{ COM1_PORT },
{ COM2_PORT },
};
struct uart_port *kgdb_uart_port;
#define UART_IN(reg) inb_p(kgdb_uart_port->base + reg)
#define UART_OUT(reg,v) outb_p((v), kgdb_uart_port->base + reg)
/* Basic read/write functions for the UART */
#define UART_LSR_RXCERR (UART_LSR_BI | UART_LSR_FE | UART_LSR_PE)
static int kgdb_uart_getchar(void)
{
int lsr;
int c = -1;
while (c == -1) {
lsr = UART_IN(UART_LSR);
if (lsr & UART_LSR_DR)
c = UART_IN(UART_RX);
if ((lsr & UART_LSR_RXCERR))
c = -1;
}
return c;
}
static void kgdb_uart_putchar(int c)
{
while ((UART_IN(UART_LSR) & UART_LSR_THRE) == 0)
;
UART_OUT(UART_TX, c);
}
/*
* Initialize UART to configured/requested values.
* (But we don't interrupts yet, or interact w/serial.c)
*/
static int kgdb_uart_setup(void)
{
int port;
int lcr = 0;
int bdiv = 0;
if (kgdb_portnum >= UART_NPORTS) {
KGDB_PRINTK("uart port %d invalid.\n", kgdb_portnum);
return -1;
}
kgdb_uart_port = &uart_ports[kgdb_portnum];
/* Init sequence from gdb_hook_interrupt */
UART_IN(UART_RX);
UART_OUT(UART_IER, 0);
UART_IN(UART_RX); /* Serial driver comments say */
UART_IN(UART_IIR); /* this clears interrupt regs */
UART_IN(UART_MSR);
/* Figure basic LCR values */
switch (kgdb_bits) {
case '7':
lcr |= UART_LCR_WLEN7;
break;
default: case '8':
lcr |= UART_LCR_WLEN8;
break;
}
switch (kgdb_parity) {
case 'O':
lcr |= UART_LCR_PARITY;
break;
case 'E':
lcr |= (UART_LCR_PARITY | UART_LCR_EPAR);
break;
default: break;
}
/* Figure the baud rate divisor */
bdiv = (SB_BASE/kgdb_baud);
/* Set the baud rate and LCR values */
UART_OUT(UART_LCR, (lcr | UART_LCR_DLAB));
UART_OUT(UART_DLL, (bdiv & 0xff));
UART_OUT(UART_DLM, ((bdiv >> 8) & 0xff));
UART_OUT(UART_LCR, lcr);
/* Set the MCR */
UART_OUT(UART_MCR, SB_MCR);
/* Turn off FIFOs for now */
UART_OUT(UART_FCR, 0);
/* Setup complete: initialize function pointers */
kgdb_getchar = kgdb_uart_getchar;
kgdb_putchar = kgdb_uart_putchar;
return 0;
}
#endif /* CONFIG_SH_KGDB */
/*
* The Machine Vector
*/
struct sh_machine_vector mv_7751se __initmv = {
.mv_name = "7751 SolutionEngine",
.mv_setup = sh7751se_setup,
.mv_nr_irqs = 72,
.mv_inb = sh7751se_inb,
.mv_inw = sh7751se_inw,
.mv_inl = sh7751se_inl,
.mv_outb = sh7751se_outb,
.mv_outw = sh7751se_outw,
.mv_outl = sh7751se_outl,
.mv_inb_p = sh7751se_inb_p,
.mv_inw_p = sh7751se_inw,
.mv_inl_p = sh7751se_inl,
.mv_outb_p = sh7751se_outb_p,
.mv_outw_p = sh7751se_outw,
.mv_outl_p = sh7751se_outl,
.mv_insl = sh7751se_insl,
.mv_outsl = sh7751se_outsl,
.mv_init_irq = init_7751se_IRQ,
#ifdef CONFIG_HEARTBEAT
.mv_heartbeat = heartbeat_7751se,
#endif
};
ALIAS_MV(7751se)
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