/*
* arch/m68k/mvme16x/config.c
*
* Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk]
*
* Based on:
*
* linux/amiga/config.c
*
* Copyright (C) 1993 Hamish Macdonald
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file README.legal in the main directory of this archive
* for more details.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/seq_file.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/genhd.h>
#include <linux/rtc.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <asm/bootinfo.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/rtc.h>
#include <asm/machdep.h>
#include <asm/mvme16xhw.h>
extern t_bdid mvme_bdid;
static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;
static void mvme16x_get_model(char *model);
extern void mvme16x_sched_init(irq_handler_t handler);
extern unsigned long mvme16x_gettimeoffset (void);
extern int mvme16x_hwclk (int, struct rtc_time *);
extern int mvme16x_set_clock_mmss (unsigned long);
extern void mvme16x_reset (void);
int bcd2int (unsigned char b);
/* Save tick handler routine pointer, will point to do_timer() in
* kernel/sched.c, called via mvme16x_process_int() */
static irq_handler_t tick_handler;
unsigned short mvme16x_config;
EXPORT_SYMBOL(mvme16x_config);
int mvme16x_parse_bootinfo(const struct bi_record *bi)
{
if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
return 0;
else
return 1;
}
void mvme16x_reset(void)
{
printk ("\r\n\nCalled mvme16x_reset\r\n"
"\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
/* The string of returns is to delay the reset until the whole
* message is output. Assert reset bit in GCSR */
*(volatile char *)0xfff40107 = 0x80;
}
static void mvme16x_get_model(char *model)
{
p_bdid p = &mvme_bdid;
char suf[4];
suf[1] = p->brdsuffix[0];
suf[2] = p->brdsuffix[1];
suf[3] = '\0';
suf[0] = suf[1] ? '-' : '\0';
sprintf(model, "Motorola MVME%x%s", p->brdno, suf);
}
static void mvme16x_get_hardware_list(struct seq_file *m)
{
p_bdid p = &mvme_bdid;
if (p->brdno == 0x0162 || p->brdno == 0x0172)
{
unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
seq_printf (m, "VMEchip2 %spresent\n",
rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
seq_printf (m, "SCSI interface %spresent\n",
rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
seq_printf (m, "Ethernet i/f %spresent\n",
rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
}
}
/*
* This function is called during kernel startup to initialize
* the mvme16x IRQ handling routines. Should probably ensure
* that the base vectors for the VMEChip2 and PCCChip2 are valid.
*/
static void __init mvme16x_init_IRQ (void)
{
m68k_setup_user_interrupt(VEC_USER, 192, NULL);
}
#define pcc2chip ((volatile u_char *)0xfff42000)
#define PccSCCMICR 0x1d
#define PccSCCTICR 0x1e
#define PccSCCRICR 0x1f
void __init config_mvme16x(void)
{
p_bdid p = &mvme_bdid;
char id[40];
mach_max_dma_address = 0xffffffff;
mach_sched_init = mvme16x_sched_init;
mach_init_IRQ = mvme16x_init_IRQ;
mach_gettimeoffset = mvme16x_gettimeoffset;
mach_hwclk = mvme16x_hwclk;
mach_set_clock_mmss = mvme16x_set_clock_mmss;
mach_reset = mvme16x_reset;
mach_get_model = mvme16x_get_model;
mach_get_hardware_list = mvme16x_get_hardware_list;
/* Report board revision */
if (strncmp("BDID", p->bdid, 4))
{
printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
while (1)
;
}
/* Board type is only set by newer versions of vmelilo/tftplilo */
if (vme_brdtype == 0)
vme_brdtype = p->brdno;
mvme16x_get_model(id);
printk ("\nBRD_ID: %s BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
p->rev&0xf, p->yr, p->mth, p->day);
if (p->brdno == 0x0162 || p->brdno == 0x172)
{
unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;
mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;
printk ("MVME%x Hardware status:\n", p->brdno);
printk (" CPU Type 68%s040\n",
rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
printk (" CPU clock %dMHz\n",
rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
printk (" VMEchip2 %spresent\n",
rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
printk (" SCSI interface %spresent\n",
rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
printk (" Ethernet interface %spresent\n",
rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
}
else
{
mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;
/* Dont allow any interrupts from the CD2401 until the interrupt */
/* handlers are installed */
pcc2chip[PccSCCMICR] = 0x10;
pcc2chip[PccSCCTICR] = 0x10;
pcc2chip[PccSCCRICR] = 0x10;
}
}
static irqreturn_t mvme16x_abort_int (int irq, void *dev_id)
{
p_bdid p = &mvme_bdid;
unsigned long *new = (unsigned long *)vectors;
unsigned long *old = (unsigned long *)0xffe00000;
volatile unsigned char uc, *ucp;
if (p->brdno == 0x0162 || p->brdno == 0x172)
{
ucp = (volatile unsigned char *)0xfff42043;
uc = *ucp | 8;
*ucp = uc;
}
else
{
*(volatile unsigned long *)0xfff40074 = 0x40000000;
}
*(new+4) = *(old+4); /* Illegal instruction */
*(new+9) = *(old+9); /* Trace */
*(new+47) = *(old+47); /* Trap #15 */
if (p->brdno == 0x0162 || p->brdno == 0x172)
*(new+0x5e) = *(old+0x5e); /* ABORT switch */
else
*(new+0x6e) = *(old+0x6e); /* ABORT switch */
return IRQ_HANDLED;
}
static irqreturn_t mvme16x_timer_int (int irq, void *dev_id)
{
*(volatile unsigned char *)0xfff4201b |= 8;
return tick_handler(irq, dev_id);
}
void mvme16x_sched_init (irq_handler_t timer_routine)
{
p_bdid p = &mvme_bdid;
int irq;
tick_handler = timer_routine;
/* Using PCCchip2 or MC2 chip tick timer 1 */
*(volatile unsigned long *)0xfff42008 = 0;
*(volatile unsigned long *)0xfff42004 = 10000; /* 10ms */
*(volatile unsigned char *)0xfff42017 |= 3;
*(volatile unsigned char *)0xfff4201b = 0x16;
if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
"timer", mvme16x_timer_int))
panic ("Couldn't register timer int");
if (p->brdno == 0x0162 || p->brdno == 0x172)
irq = MVME162_IRQ_ABORT;
else
irq = MVME167_IRQ_ABORT;
if (request_irq(irq, mvme16x_abort_int, 0,
"abort", mvme16x_abort_int))
panic ("Couldn't register abort int");
}
/* This is always executed with interrupts disabled. */
unsigned long mvme16x_gettimeoffset (void)
{
return (*(volatile unsigned long *)0xfff42008);
}
int bcd2int (unsigned char b)
{
return ((b>>4)*10 + (b&15));
}
int mvme16x_hwclk(int op, struct rtc_time *t)
{
#warning check me!
if (!op) {
rtc->ctrl = RTC_READ;
t->tm_year = bcd2int (rtc->bcd_year);
t->tm_mon = bcd2int (rtc->bcd_mth);
t->tm_mday = bcd2int (rtc->bcd_dom);
t->tm_hour = bcd2int (rtc->bcd_hr);
t->tm_min = bcd2int (rtc->bcd_min);
t->tm_sec = bcd2int (rtc->bcd_sec);
rtc->ctrl = 0;
}
return 0;
}
int mvme16x_set_clock_mmss (unsigned long nowtime)
{
return 0;
}
