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Diffstat (limited to 'arch/m68k/mvme16x/config.c')
-rw-r--r-- | arch/m68k/mvme16x/config.c | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/arch/m68k/mvme16x/config.c b/arch/m68k/mvme16x/config.c new file mode 100644 index 00000000000..26ce81c1337 --- /dev/null +++ b/arch/m68k/mvme16x/config.c @@ -0,0 +1,286 @@ +/* + * 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/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 <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; + +extern irqreturn_t mvme16x_process_int (int level, struct pt_regs *regs); +extern void mvme16x_init_IRQ (void); +extern void mvme16x_free_irq (unsigned int, void *); +extern int show_mvme16x_interrupts (struct seq_file *, void *); +extern void mvme16x_enable_irq (unsigned int); +extern void mvme16x_disable_irq (unsigned int); +static void mvme16x_get_model(char *model); +static int mvme16x_get_hardware_list(char *buffer); +extern int mvme16x_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id); +extern void mvme16x_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)); +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); +extern void mvme16x_waitbut(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 irqreturn_t (*tick_handler)(int, void *, struct pt_regs *); + + +unsigned short 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 int mvme16x_get_hardware_list(char *buffer) +{ + p_bdid p = &mvme_bdid; + int len = 0; + + if (p->brdno == 0x0162 || p->brdno == 0x0172) + { + unsigned char rev = *(unsigned char *)MVME162_VERSION_REG; + + len += sprintf (buffer+len, "VMEchip2 %spresent\n", + rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : ""); + len += sprintf (buffer+len, "SCSI interface %spresent\n", + rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : ""); + len += sprintf (buffer+len, "Ethernet i/f %spresent\n", + rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : ""); + } + else + *buffer = '\0'; + + return (len); +} + + +#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_free_irq = mvme16x_free_irq; + mach_process_int = mvme16x_process_int; + mach_get_irq_list = show_mvme16x_interrupts; + mach_request_irq = mvme16x_request_irq; + enable_irq = mvme16x_enable_irq; + disable_irq = mvme16x_disable_irq; + 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, struct pt_regs *fp) +{ + 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, struct pt_regs *fp) +{ + *(volatile unsigned char *)0xfff4201b |= 8; + return tick_handler(irq, dev_id, fp); +} + +void mvme16x_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *)) +{ + 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; +} + |