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