1 |
1275 |
phoenix |
/*
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* arch/m68k/bvme6000/config.c
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*
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* Copyright (C) 1997 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/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/rtc.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/bvme6000hw.h>
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extern void bvme6000_process_int (int level, struct pt_regs *regs);
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extern void bvme6000_init_IRQ (void);
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extern void bvme6000_free_irq (unsigned int, void *);
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extern int bvme6000_get_irq_list (char *);
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extern void bvme6000_enable_irq (unsigned int);
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extern void bvme6000_disable_irq (unsigned int);
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static void bvme6000_get_model(char *model);
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static int bvme6000_get_hardware_list(char *buffer);
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extern int bvme6000_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
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extern void bvme6000_sched_init(void (*handler)(int, void *, struct pt_regs *));
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extern int bvme6000_keyb_init(void);
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extern int bvme6000_kbdrate (struct kbd_repeat *);
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extern unsigned long bvme6000_gettimeoffset (void);
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extern void bvme6000_gettod (int *year, int *mon, int *day, int *hour,
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int *min, int *sec);
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extern int bvme6000_hwclk (int, struct rtc_time *);
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extern int bvme6000_set_clock_mmss (unsigned long);
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extern void bvme6000_check_partition (struct gendisk *hd, unsigned int dev);
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extern void bvme6000_mksound( unsigned int count, unsigned int ticks );
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extern void bvme6000_reset (void);
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extern void bvme6000_waitbut(void);
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void bvme6000_set_vectors (void);
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static unsigned char bcd2bin (unsigned char b);
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static unsigned char bin2bcd (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 bvme6000_process_int() */
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static void (*tick_handler)(int, void *, struct pt_regs *);
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int bvme6000_parse_bootinfo(const struct bi_record *bi)
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{
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if (bi->tag == BI_VME_TYPE)
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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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int bvme6000_kbdrate (struct kbd_repeat *k)
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{
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return 0;
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}
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void bvme6000_mksound( unsigned int count, unsigned int ticks )
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{
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}
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void bvme6000_reset()
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{
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volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
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printk ("\r\n\nCalled bvme6000_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. */
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/* Enable the watchdog, via PIT port C bit 4 */
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pit->pcddr |= 0x10; /* WDOG enable */
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while(1)
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;
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}
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static void bvme6000_get_model(char *model)
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{
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sprintf(model, "BVME%d000", m68k_cputype == CPU_68060 ? 6 : 4);
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}
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/* No hardware options on BVME6000? */
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static int bvme6000_get_hardware_list(char *buffer)
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{
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*buffer = '\0';
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return 0;
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}
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void __init config_bvme6000(void)
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{
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volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
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/* Board type is only set by newer versions of vmelilo/tftplilo */
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if (!vme_brdtype) {
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if (m68k_cputype == CPU_68060)
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vme_brdtype = VME_TYPE_BVME6000;
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else
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vme_brdtype = VME_TYPE_BVME4000;
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}
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#if 0
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/* Call bvme6000_set_vectors() so ABORT will work, along with BVMBug
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* debugger. Note trap_init() will splat the abort vector, but
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* bvme6000_init_IRQ() will put it back again. Hopefully. */
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bvme6000_set_vectors();
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#endif
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mach_max_dma_address = 0xffffffff;
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mach_sched_init = bvme6000_sched_init;
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#ifdef CONFIG_VT
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mach_keyb_init = bvme6000_keyb_init;
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mach_kbdrate = bvme6000_kbdrate;
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#endif
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mach_init_IRQ = bvme6000_init_IRQ;
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mach_gettimeoffset = bvme6000_gettimeoffset;
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mach_gettod = bvme6000_gettod;
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mach_hwclk = bvme6000_hwclk;
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mach_set_clock_mmss = bvme6000_set_clock_mmss;
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/* mach_mksound = bvme6000_mksound; */
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mach_reset = bvme6000_reset;
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mach_free_irq = bvme6000_free_irq;
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mach_process_int = bvme6000_process_int;
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mach_get_irq_list = bvme6000_get_irq_list;
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mach_request_irq = bvme6000_request_irq;
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enable_irq = bvme6000_enable_irq;
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disable_irq = bvme6000_disable_irq;
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mach_get_model = bvme6000_get_model;
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mach_get_hardware_list = bvme6000_get_hardware_list;
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printk ("Board is %sconfigured as a System Controller\n",
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*config_reg_ptr & BVME_CONFIG_SW1 ? "" : "not ");
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/* Now do the PIT configuration */
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pit->pgcr = 0x00; /* Unidirectional 8 bit, no handshake for now */
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pit->psrr = 0x18; /* PIACK and PIRQ fucntions enabled */
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pit->pacr = 0x00; /* Sub Mode 00, H2 i/p, no DMA */
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pit->padr = 0x00; /* Just to be tidy! */
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pit->paddr = 0x00; /* All inputs for now (safest) */
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pit->pbcr = 0x80; /* Sub Mode 1x, H4 i/p, no DMA */
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pit->pbdr = 0xbc | (*config_reg_ptr & BVME_CONFIG_SW1 ? 0 : 0x40);
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/* PRI, SYSCON?, Level3, SCC clks from xtal */
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pit->pbddr = 0xf3; /* Mostly outputs */
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pit->pcdr = 0x01; /* PA transceiver disabled */
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pit->pcddr = 0x03; /* WDOG disable */
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/* Disable snooping for Ethernet and VME accesses */
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bvme_acr_addrctl = 0;
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}
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void bvme6000_abort_int (int irq, void *dev_id, struct pt_regs *fp)
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{
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unsigned long *new = (unsigned long *)vectors;
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unsigned long *old = (unsigned long *)0xf8000000;
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/* Wait for button release */
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while (*(volatile unsigned char *)BVME_LOCAL_IRQ_STAT & BVME_ABORT_STATUS)
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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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*(new+0x1f) = *(old+0x1f); /* ABORT switch */
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}
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static void bvme6000_timer_int (int irq, void *dev_id, struct pt_regs *fp)
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{
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volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
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unsigned char msr = rtc->msr & 0xc0;
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rtc->msr = msr | 0x20; /* Ack the interrupt */
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tick_handler(irq, dev_id, fp);
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}
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/*
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* Set up the RTC timer 1 to mode 2, so T1 output toggles every 5ms
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* (40000 x 125ns). It will interrupt every 10ms, when T1 goes low.
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* So, when reading the elapsed time, you should read timer1,
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* subtract it from 39999, and then add 40000 if T1 is high.
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* That gives you the number of 125ns ticks in to the 10ms period,
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* so divide by 8 to get the microsecond result.
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*/
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void bvme6000_sched_init (void (*timer_routine)(int, void *, struct pt_regs *))
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{
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volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
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unsigned char msr = rtc->msr & 0xc0;
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rtc->msr = 0; /* Ensure timer registers accessible */
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tick_handler = timer_routine;
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if (request_irq(BVME_IRQ_RTC, bvme6000_timer_int, 0,
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"timer", bvme6000_timer_int))
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panic ("Couldn't register timer int");
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rtc->t1cr_omr = 0x04; /* Mode 2, ext clk */
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rtc->t1msb = 39999 >> 8;
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rtc->t1lsb = 39999 & 0xff;
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rtc->irr_icr1 &= 0xef; /* Route timer 1 to INTR pin */
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rtc->msr = 0x40; /* Access int.cntrl, etc */
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rtc->pfr_icr0 = 0x80; /* Just timer 1 ints enabled */
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rtc->irr_icr1 = 0;
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rtc->t1cr_omr = 0x0a; /* INTR+T1 active lo, push-pull */
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rtc->t0cr_rtmr &= 0xdf; /* Stop timers in standby */
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rtc->msr = 0; /* Access timer 1 control */
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rtc->t1cr_omr = 0x05; /* Mode 2, ext clk, GO */
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rtc->msr = msr;
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if (request_irq(BVME_IRQ_ABORT, bvme6000_abort_int, 0,
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"abort", bvme6000_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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/*
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* NOTE: Don't accept any readings within 5us of rollover, as
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* the T1INT bit may be a little slow getting set. There is also
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* a fault in the chip, meaning that reads may produce invalid
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* results...
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*/
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unsigned long bvme6000_gettimeoffset (void)
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{
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volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
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volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE;
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unsigned char msr = rtc->msr & 0xc0;
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unsigned char t1int, t1op;
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unsigned long v = 800000, ov;
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rtc->msr = 0; /* Ensure timer registers accessible */
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do {
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ov = v;
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t1int = rtc->msr & 0x20;
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t1op = pit->pcdr & 0x04;
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rtc->t1cr_omr |= 0x40; /* Latch timer1 */
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v = rtc->t1msb << 8; /* Read timer1 */
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v |= rtc->t1lsb; /* Read timer1 */
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} while (t1int != (rtc->msr & 0x20) ||
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t1op != (pit->pcdr & 0x04) ||
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abs(ov-v) > 80 ||
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v > 39960);
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v = 39999 - v;
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if (!t1op) /* If in second half cycle.. */
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v += 40000;
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v /= 8; /* Convert ticks to microseconds */
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if (t1int)
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v += 10000; /* Int pending, + 10ms */
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rtc->msr = msr;
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287 |
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return v;
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288 |
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}
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289 |
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|
290 |
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extern void bvme6000_gettod (int *year, int *mon, int *day, int *hour,
|
291 |
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int *min, int *sec)
|
292 |
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{
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293 |
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volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
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294 |
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unsigned char msr = rtc->msr & 0xc0;
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295 |
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296 |
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rtc->msr = 0; /* Ensure clock accessible */
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297 |
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298 |
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do { /* Loop until we get a reading with a stable seconds field */
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*sec = bcd2bin (rtc->bcd_sec);
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*min = bcd2bin (rtc->bcd_min);
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*hour = bcd2bin (rtc->bcd_hr);
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*day = bcd2bin (rtc->bcd_dom);
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*mon = bcd2bin (rtc->bcd_mth);
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*year = bcd2bin (rtc->bcd_year);
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} while (bcd2bin (rtc->bcd_sec) != *sec);
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307 |
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rtc->msr = msr;
|
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}
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309 |
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310 |
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static unsigned char bcd2bin (unsigned char b)
|
311 |
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{
|
312 |
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return ((b>>4)*10 + (b&15));
|
313 |
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}
|
314 |
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|
315 |
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static unsigned char bin2bcd (unsigned char b)
|
316 |
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{
|
317 |
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return (((b/10)*16) + (b%10));
|
318 |
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}
|
319 |
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|
320 |
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|
321 |
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/*
|
322 |
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* Looks like op is non-zero for setting the clock, and zero for
|
323 |
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* reading the clock.
|
324 |
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*
|
325 |
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* struct hwclk_time {
|
326 |
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* unsigned sec; 0..59
|
327 |
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* unsigned min; 0..59
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328 |
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* unsigned hour; 0..23
|
329 |
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* unsigned day; 1..31
|
330 |
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* unsigned mon; 0..11
|
331 |
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* unsigned year; 00...
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332 |
|
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* int wday; 0..6, 0 is Sunday, -1 means unknown/don't set
|
333 |
|
|
* };
|
334 |
|
|
*/
|
335 |
|
|
|
336 |
|
|
int bvme6000_hwclk(int op, struct rtc_time *t)
|
337 |
|
|
{
|
338 |
|
|
volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
|
339 |
|
|
unsigned char msr = rtc->msr & 0xc0;
|
340 |
|
|
|
341 |
|
|
rtc->msr = 0x40; /* Ensure clock and real-time-mode-register
|
342 |
|
|
* are accessible */
|
343 |
|
|
if (op)
|
344 |
|
|
{ /* Write.... */
|
345 |
|
|
rtc->t0cr_rtmr = t->tm_year%4;
|
346 |
|
|
rtc->bcd_tenms = 0;
|
347 |
|
|
rtc->bcd_sec = bin2bcd(t->tm_sec);
|
348 |
|
|
rtc->bcd_min = bin2bcd(t->tm_min);
|
349 |
|
|
rtc->bcd_hr = bin2bcd(t->tm_hour);
|
350 |
|
|
rtc->bcd_dom = bin2bcd(t->tm_mday);
|
351 |
|
|
rtc->bcd_mth = bin2bcd(t->tm_mon + 1);
|
352 |
|
|
rtc->bcd_year = bin2bcd(t->tm_year%100);
|
353 |
|
|
if (t->tm_wday >= 0)
|
354 |
|
|
rtc->bcd_dow = bin2bcd(t->tm_wday+1);
|
355 |
|
|
rtc->t0cr_rtmr = t->tm_year%4 | 0x08;
|
356 |
|
|
}
|
357 |
|
|
else
|
358 |
|
|
{ /* Read.... */
|
359 |
|
|
do {
|
360 |
|
|
t->tm_sec = bcd2bin(rtc->bcd_sec);
|
361 |
|
|
t->tm_min = bcd2bin(rtc->bcd_min);
|
362 |
|
|
t->tm_hour = bcd2bin(rtc->bcd_hr);
|
363 |
|
|
t->tm_mday = bcd2bin(rtc->bcd_dom);
|
364 |
|
|
t->tm_mon = bcd2bin(rtc->bcd_mth)-1;
|
365 |
|
|
t->tm_year = bcd2bin(rtc->bcd_year);
|
366 |
|
|
if (t->tm_year < 70)
|
367 |
|
|
t->tm_year += 100;
|
368 |
|
|
t->tm_wday = bcd2bin(rtc->bcd_dow)-1;
|
369 |
|
|
} while (t->tm_sec != bcd2bin(rtc->bcd_sec));
|
370 |
|
|
}
|
371 |
|
|
|
372 |
|
|
rtc->msr = msr;
|
373 |
|
|
|
374 |
|
|
return 0;
|
375 |
|
|
}
|
376 |
|
|
|
377 |
|
|
/*
|
378 |
|
|
* Set the minutes and seconds from seconds value 'nowtime'. Fail if
|
379 |
|
|
* clock is out by > 30 minutes. Logic lifted from atari code.
|
380 |
|
|
* Algorithm is to wait for the 10ms register to change, and then to
|
381 |
|
|
* wait a short while, and then set it.
|
382 |
|
|
*/
|
383 |
|
|
|
384 |
|
|
int bvme6000_set_clock_mmss (unsigned long nowtime)
|
385 |
|
|
{
|
386 |
|
|
int retval = 0;
|
387 |
|
|
short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
|
388 |
|
|
unsigned char rtc_minutes, rtc_tenms;
|
389 |
|
|
volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE;
|
390 |
|
|
unsigned char msr = rtc->msr & 0xc0;
|
391 |
|
|
unsigned long flags;
|
392 |
|
|
volatile int i;
|
393 |
|
|
|
394 |
|
|
rtc->msr = 0; /* Ensure clock accessible */
|
395 |
|
|
rtc_minutes = bcd2bin (rtc->bcd_min);
|
396 |
|
|
|
397 |
|
|
if ((rtc_minutes < real_minutes
|
398 |
|
|
? real_minutes - rtc_minutes
|
399 |
|
|
: rtc_minutes - real_minutes) < 30)
|
400 |
|
|
{
|
401 |
|
|
save_flags(flags);
|
402 |
|
|
cli();
|
403 |
|
|
rtc_tenms = rtc->bcd_tenms;
|
404 |
|
|
while (rtc_tenms == rtc->bcd_tenms)
|
405 |
|
|
;
|
406 |
|
|
for (i = 0; i < 1000; i++)
|
407 |
|
|
;
|
408 |
|
|
rtc->bcd_min = bin2bcd(real_minutes);
|
409 |
|
|
rtc->bcd_sec = bin2bcd(real_seconds);
|
410 |
|
|
restore_flags(flags);
|
411 |
|
|
}
|
412 |
|
|
else
|
413 |
|
|
retval = -1;
|
414 |
|
|
|
415 |
|
|
rtc->msr = msr;
|
416 |
|
|
|
417 |
|
|
return retval;
|
418 |
|
|
}
|
419 |
|
|
|
420 |
|
|
|
421 |
|
|
int bvme6000_keyb_init (void)
|
422 |
|
|
{
|
423 |
|
|
return 0;
|
424 |
|
|
}
|