diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68k/bvme6000 | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m68k/bvme6000')
-rw-r--r-- | arch/m68k/bvme6000/Makefile | 5 | ||||
-rw-r--r-- | arch/m68k/bvme6000/bvmeints.c | 160 | ||||
-rw-r--r-- | arch/m68k/bvme6000/config.c | 380 | ||||
-rw-r--r-- | arch/m68k/bvme6000/rtc.c | 182 |
4 files changed, 727 insertions, 0 deletions
diff --git a/arch/m68k/bvme6000/Makefile b/arch/m68k/bvme6000/Makefile new file mode 100644 index 0000000..2348e6c --- /dev/null +++ b/arch/m68k/bvme6000/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for Linux arch/m68k/bvme6000 source directory +# + +obj-y := config.o bvmeints.o rtc.o diff --git a/arch/m68k/bvme6000/bvmeints.c b/arch/m68k/bvme6000/bvmeints.c new file mode 100644 index 0000000..298a8df --- /dev/null +++ b/arch/m68k/bvme6000/bvmeints.c @@ -0,0 +1,160 @@ +/* + * arch/m68k/bvme6000/bvmeints.c + * + * Copyright (C) 1997 Richard Hirst [richard@sleepie.demon.co.uk] + * + * based on amiints.c -- Amiga Linux interrupt handling code + * + * 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/errno.h> +#include <linux/seq_file.h> + +#include <asm/ptrace.h> +#include <asm/system.h> +#include <asm/irq.h> +#include <asm/traps.h> + +static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp); + +/* + * This should ideally be 4 elements only, for speed. + */ + +static struct { + irqreturn_t (*handler)(int, void *, struct pt_regs *); + unsigned long flags; + void *dev_id; + const char *devname; + unsigned count; +} irq_tab[256]; + +/* + * void bvme6000_init_IRQ (void) + * + * Parameters: None + * + * Returns: Nothing + * + * This function is called during kernel startup to initialize + * the bvme6000 IRQ handling routines. + */ + +void bvme6000_init_IRQ (void) +{ + int i; + + for (i = 0; i < 256; i++) { + irq_tab[i].handler = bvme6000_defhand; + irq_tab[i].flags = IRQ_FLG_STD; + irq_tab[i].dev_id = NULL; + irq_tab[i].devname = NULL; + irq_tab[i].count = 0; + } +} + +int bvme6000_request_irq(unsigned int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, const char *devname, void *dev_id) +{ + if (irq > 255) { + printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__, irq, devname); + return -ENXIO; + } +#if 0 + /* Nothing special about auto-vectored devices for the BVME6000, + * but treat it specially to avoid changes elsewhere. + */ + + if (irq >= VEC_INT1 && irq <= VEC_INT7) + return cpu_request_irq(irq - VEC_SPUR, handler, flags, + devname, dev_id); +#endif + if (!(irq_tab[irq].flags & IRQ_FLG_STD)) { + if (irq_tab[irq].flags & IRQ_FLG_LOCK) { + printk("%s: IRQ %d from %s is not replaceable\n", + __FUNCTION__, irq, irq_tab[irq].devname); + return -EBUSY; + } + if (flags & IRQ_FLG_REPLACE) { + printk("%s: %s can't replace IRQ %d from %s\n", + __FUNCTION__, devname, irq, irq_tab[irq].devname); + return -EBUSY; + } + } + irq_tab[irq].handler = handler; + irq_tab[irq].flags = flags; + irq_tab[irq].dev_id = dev_id; + irq_tab[irq].devname = devname; + return 0; +} + +void bvme6000_free_irq(unsigned int irq, void *dev_id) +{ + if (irq > 255) { + printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq); + return; + } +#if 0 + if (irq >= VEC_INT1 && irq <= VEC_INT7) { + cpu_free_irq(irq - VEC_SPUR, dev_id); + return; + } +#endif + if (irq_tab[irq].dev_id != dev_id) + printk("%s: Removing probably wrong IRQ %d from %s\n", + __FUNCTION__, irq, irq_tab[irq].devname); + + irq_tab[irq].handler = bvme6000_defhand; + irq_tab[irq].flags = IRQ_FLG_STD; + irq_tab[irq].dev_id = NULL; + irq_tab[irq].devname = NULL; +} + +irqreturn_t bvme6000_process_int (unsigned long vec, struct pt_regs *fp) +{ + if (vec > 255) { + printk ("bvme6000_process_int: Illegal vector %ld", vec); + return IRQ_NONE; + } else { + irq_tab[vec].count++; + irq_tab[vec].handler(vec, irq_tab[vec].dev_id, fp); + return IRQ_HANDLED; + } +} + +int show_bvme6000_interrupts(struct seq_file *p, void *v) +{ + int i; + + for (i = 0; i < 256; i++) { + if (irq_tab[i].count) + seq_printf(p, "Vec 0x%02x: %8d %s\n", + i, irq_tab[i].count, + irq_tab[i].devname ? irq_tab[i].devname : "free"); + } + return 0; +} + + +static irqreturn_t bvme6000_defhand (int irq, void *dev_id, struct pt_regs *fp) +{ + printk ("Unknown interrupt 0x%02x\n", irq); + return IRQ_NONE; +} + +void bvme6000_enable_irq (unsigned int irq) +{ +} + + +void bvme6000_disable_irq (unsigned int irq) +{ +} + diff --git a/arch/m68k/bvme6000/config.c b/arch/m68k/bvme6000/config.c new file mode 100644 index 0000000..3ffc84f --- /dev/null +++ b/arch/m68k/bvme6000/config.c @@ -0,0 +1,380 @@ +/* + * arch/m68k/bvme6000/config.c + * + * Copyright (C) 1997 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/bvme6000hw.h> + +extern irqreturn_t bvme6000_process_int (int level, struct pt_regs *regs); +extern void bvme6000_init_IRQ (void); +extern void bvme6000_free_irq (unsigned int, void *); +extern int show_bvme6000_interrupts(struct seq_file *, void *); +extern void bvme6000_enable_irq (unsigned int); +extern void bvme6000_disable_irq (unsigned int); +static void bvme6000_get_model(char *model); +static int bvme6000_get_hardware_list(char *buffer); +extern int bvme6000_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id); +extern void bvme6000_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)); +extern unsigned long bvme6000_gettimeoffset (void); +extern int bvme6000_hwclk (int, struct rtc_time *); +extern int bvme6000_set_clock_mmss (unsigned long); +extern void bvme6000_reset (void); +extern void bvme6000_waitbut(void); +void bvme6000_set_vectors (void); + +static unsigned char bcd2bin (unsigned char b); +static unsigned char bin2bcd (unsigned char b); + +/* Save tick handler routine pointer, will point to do_timer() in + * kernel/sched.c, called via bvme6000_process_int() */ + +static irqreturn_t (*tick_handler)(int, void *, struct pt_regs *); + + +int bvme6000_parse_bootinfo(const struct bi_record *bi) +{ + if (bi->tag == BI_VME_TYPE) + return 0; + else + return 1; +} + +void bvme6000_reset(void) +{ + volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE; + + printk ("\r\n\nCalled bvme6000_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. */ + /* Enable the watchdog, via PIT port C bit 4 */ + + pit->pcddr |= 0x10; /* WDOG enable */ + + while(1) + ; +} + +static void bvme6000_get_model(char *model) +{ + sprintf(model, "BVME%d000", m68k_cputype == CPU_68060 ? 6 : 4); +} + + +/* No hardware options on BVME6000? */ + +static int bvme6000_get_hardware_list(char *buffer) +{ + *buffer = '\0'; + return 0; +} + + +void __init config_bvme6000(void) +{ + volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE; + + /* Board type is only set by newer versions of vmelilo/tftplilo */ + if (!vme_brdtype) { + if (m68k_cputype == CPU_68060) + vme_brdtype = VME_TYPE_BVME6000; + else + vme_brdtype = VME_TYPE_BVME4000; + } +#if 0 + /* Call bvme6000_set_vectors() so ABORT will work, along with BVMBug + * debugger. Note trap_init() will splat the abort vector, but + * bvme6000_init_IRQ() will put it back again. Hopefully. */ + + bvme6000_set_vectors(); +#endif + + mach_max_dma_address = 0xffffffff; + mach_sched_init = bvme6000_sched_init; + mach_init_IRQ = bvme6000_init_IRQ; + mach_gettimeoffset = bvme6000_gettimeoffset; + mach_hwclk = bvme6000_hwclk; + mach_set_clock_mmss = bvme6000_set_clock_mmss; + mach_reset = bvme6000_reset; + mach_free_irq = bvme6000_free_irq; + mach_process_int = bvme6000_process_int; + mach_get_irq_list = show_bvme6000_interrupts; + mach_request_irq = bvme6000_request_irq; + enable_irq = bvme6000_enable_irq; + disable_irq = bvme6000_disable_irq; + mach_get_model = bvme6000_get_model; + mach_get_hardware_list = bvme6000_get_hardware_list; + + printk ("Board is %sconfigured as a System Controller\n", + *config_reg_ptr & BVME_CONFIG_SW1 ? "" : "not "); + + /* Now do the PIT configuration */ + + pit->pgcr = 0x00; /* Unidirectional 8 bit, no handshake for now */ + pit->psrr = 0x18; /* PIACK and PIRQ fucntions enabled */ + pit->pacr = 0x00; /* Sub Mode 00, H2 i/p, no DMA */ + pit->padr = 0x00; /* Just to be tidy! */ + pit->paddr = 0x00; /* All inputs for now (safest) */ + pit->pbcr = 0x80; /* Sub Mode 1x, H4 i/p, no DMA */ + pit->pbdr = 0xbc | (*config_reg_ptr & BVME_CONFIG_SW1 ? 0 : 0x40); + /* PRI, SYSCON?, Level3, SCC clks from xtal */ + pit->pbddr = 0xf3; /* Mostly outputs */ + pit->pcdr = 0x01; /* PA transceiver disabled */ + pit->pcddr = 0x03; /* WDOG disable */ + + /* Disable snooping for Ethernet and VME accesses */ + + bvme_acr_addrctl = 0; +} + + +irqreturn_t bvme6000_abort_int (int irq, void *dev_id, struct pt_regs *fp) +{ + unsigned long *new = (unsigned long *)vectors; + unsigned long *old = (unsigned long *)0xf8000000; + + /* Wait for button release */ + while (*(volatile unsigned char *)BVME_LOCAL_IRQ_STAT & BVME_ABORT_STATUS) + ; + + *(new+4) = *(old+4); /* Illegal instruction */ + *(new+9) = *(old+9); /* Trace */ + *(new+47) = *(old+47); /* Trap #15 */ + *(new+0x1f) = *(old+0x1f); /* ABORT switch */ + return IRQ_HANDLED; +} + + +static irqreturn_t bvme6000_timer_int (int irq, void *dev_id, struct pt_regs *fp) +{ + volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE; + unsigned char msr = rtc->msr & 0xc0; + + rtc->msr = msr | 0x20; /* Ack the interrupt */ + + return tick_handler(irq, dev_id, fp); +} + +/* + * Set up the RTC timer 1 to mode 2, so T1 output toggles every 5ms + * (40000 x 125ns). It will interrupt every 10ms, when T1 goes low. + * So, when reading the elapsed time, you should read timer1, + * subtract it from 39999, and then add 40000 if T1 is high. + * That gives you the number of 125ns ticks in to the 10ms period, + * so divide by 8 to get the microsecond result. + */ + +void bvme6000_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *)) +{ + volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE; + unsigned char msr = rtc->msr & 0xc0; + + rtc->msr = 0; /* Ensure timer registers accessible */ + + tick_handler = timer_routine; + if (request_irq(BVME_IRQ_RTC, bvme6000_timer_int, 0, + "timer", bvme6000_timer_int)) + panic ("Couldn't register timer int"); + + rtc->t1cr_omr = 0x04; /* Mode 2, ext clk */ + rtc->t1msb = 39999 >> 8; + rtc->t1lsb = 39999 & 0xff; + rtc->irr_icr1 &= 0xef; /* Route timer 1 to INTR pin */ + rtc->msr = 0x40; /* Access int.cntrl, etc */ + rtc->pfr_icr0 = 0x80; /* Just timer 1 ints enabled */ + rtc->irr_icr1 = 0; + rtc->t1cr_omr = 0x0a; /* INTR+T1 active lo, push-pull */ + rtc->t0cr_rtmr &= 0xdf; /* Stop timers in standby */ + rtc->msr = 0; /* Access timer 1 control */ + rtc->t1cr_omr = 0x05; /* Mode 2, ext clk, GO */ + + rtc->msr = msr; + + if (request_irq(BVME_IRQ_ABORT, bvme6000_abort_int, 0, + "abort", bvme6000_abort_int)) + panic ("Couldn't register abort int"); +} + + +/* This is always executed with interrupts disabled. */ + +/* + * NOTE: Don't accept any readings within 5us of rollover, as + * the T1INT bit may be a little slow getting set. There is also + * a fault in the chip, meaning that reads may produce invalid + * results... + */ + +unsigned long bvme6000_gettimeoffset (void) +{ + volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE; + volatile PitRegsPtr pit = (PitRegsPtr)BVME_PIT_BASE; + unsigned char msr = rtc->msr & 0xc0; + unsigned char t1int, t1op; + unsigned long v = 800000, ov; + + rtc->msr = 0; /* Ensure timer registers accessible */ + + do { + ov = v; + t1int = rtc->msr & 0x20; + t1op = pit->pcdr & 0x04; + rtc->t1cr_omr |= 0x40; /* Latch timer1 */ + v = rtc->t1msb << 8; /* Read timer1 */ + v |= rtc->t1lsb; /* Read timer1 */ + } while (t1int != (rtc->msr & 0x20) || + t1op != (pit->pcdr & 0x04) || + abs(ov-v) > 80 || + v > 39960); + + v = 39999 - v; + if (!t1op) /* If in second half cycle.. */ + v += 40000; + v /= 8; /* Convert ticks to microseconds */ + if (t1int) + v += 10000; /* Int pending, + 10ms */ + rtc->msr = msr; + + return v; +} + +static unsigned char bcd2bin (unsigned char b) +{ + return ((b>>4)*10 + (b&15)); +} + +static unsigned char bin2bcd (unsigned char b) +{ + return (((b/10)*16) + (b%10)); +} + + +/* + * Looks like op is non-zero for setting the clock, and zero for + * reading the clock. + * + * struct hwclk_time { + * unsigned sec; 0..59 + * unsigned min; 0..59 + * unsigned hour; 0..23 + * unsigned day; 1..31 + * unsigned mon; 0..11 + * unsigned year; 00... + * int wday; 0..6, 0 is Sunday, -1 means unknown/don't set + * }; + */ + +int bvme6000_hwclk(int op, struct rtc_time *t) +{ + volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE; + unsigned char msr = rtc->msr & 0xc0; + + rtc->msr = 0x40; /* Ensure clock and real-time-mode-register + * are accessible */ + if (op) + { /* Write.... */ + rtc->t0cr_rtmr = t->tm_year%4; + rtc->bcd_tenms = 0; + rtc->bcd_sec = bin2bcd(t->tm_sec); + rtc->bcd_min = bin2bcd(t->tm_min); + rtc->bcd_hr = bin2bcd(t->tm_hour); + rtc->bcd_dom = bin2bcd(t->tm_mday); + rtc->bcd_mth = bin2bcd(t->tm_mon + 1); + rtc->bcd_year = bin2bcd(t->tm_year%100); + if (t->tm_wday >= 0) + rtc->bcd_dow = bin2bcd(t->tm_wday+1); + rtc->t0cr_rtmr = t->tm_year%4 | 0x08; + } + else + { /* Read.... */ + do { + t->tm_sec = bcd2bin(rtc->bcd_sec); + t->tm_min = bcd2bin(rtc->bcd_min); + t->tm_hour = bcd2bin(rtc->bcd_hr); + t->tm_mday = bcd2bin(rtc->bcd_dom); + t->tm_mon = bcd2bin(rtc->bcd_mth)-1; + t->tm_year = bcd2bin(rtc->bcd_year); + if (t->tm_year < 70) + t->tm_year += 100; + t->tm_wday = bcd2bin(rtc->bcd_dow)-1; + } while (t->tm_sec != bcd2bin(rtc->bcd_sec)); + } + + rtc->msr = msr; + + return 0; +} + +/* + * Set the minutes and seconds from seconds value 'nowtime'. Fail if + * clock is out by > 30 minutes. Logic lifted from atari code. + * Algorithm is to wait for the 10ms register to change, and then to + * wait a short while, and then set it. + */ + +int bvme6000_set_clock_mmss (unsigned long nowtime) +{ + int retval = 0; + short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60; + unsigned char rtc_minutes, rtc_tenms; + volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE; + unsigned char msr = rtc->msr & 0xc0; + unsigned long flags; + volatile int i; + + rtc->msr = 0; /* Ensure clock accessible */ + rtc_minutes = bcd2bin (rtc->bcd_min); + + if ((rtc_minutes < real_minutes + ? real_minutes - rtc_minutes + : rtc_minutes - real_minutes) < 30) + { + local_irq_save(flags); + rtc_tenms = rtc->bcd_tenms; + while (rtc_tenms == rtc->bcd_tenms) + ; + for (i = 0; i < 1000; i++) + ; + rtc->bcd_min = bin2bcd(real_minutes); + rtc->bcd_sec = bin2bcd(real_seconds); + local_irq_restore(flags); + } + else + retval = -1; + + rtc->msr = msr; + + return retval; +} + diff --git a/arch/m68k/bvme6000/rtc.c b/arch/m68k/bvme6000/rtc.c new file mode 100644 index 0000000..c6b2a41 --- /dev/null +++ b/arch/m68k/bvme6000/rtc.c @@ -0,0 +1,182 @@ +/* + * Real Time Clock interface for Linux on the BVME6000 + * + * Based on the PC driver by Paul Gortmaker. + */ + +#define RTC_VERSION "1.00" + +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/miscdevice.h> +#include <linux/slab.h> +#include <linux/ioport.h> +#include <linux/fcntl.h> +#include <linux/init.h> +#include <linux/poll.h> +#include <linux/mc146818rtc.h> /* For struct rtc_time and ioctls, etc */ +#include <linux/smp_lock.h> +#include <asm/bvme6000hw.h> + +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/system.h> +#include <asm/setup.h> + +/* + * We sponge a minor off of the misc major. No need slurping + * up another valuable major dev number for this. If you add + * an ioctl, make sure you don't conflict with SPARC's RTC + * ioctls. + */ + +#define BCD2BIN(val) (((val)&15) + ((val)>>4)*10) +#define BIN2BCD(val) ((((val)/10)<<4) + (val)%10) + +static unsigned char days_in_mo[] = +{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; + +static char rtc_status; + +static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd, + unsigned long arg) +{ + volatile RtcPtr_t rtc = (RtcPtr_t)BVME_RTC_BASE; + unsigned char msr; + unsigned long flags; + struct rtc_time wtime; + + switch (cmd) { + case RTC_RD_TIME: /* Read the time/date from RTC */ + { + local_irq_save(flags); + /* Ensure clock and real-time-mode-register are accessible */ + msr = rtc->msr & 0xc0; + rtc->msr = 0x40; + memset(&wtime, 0, sizeof(struct rtc_time)); + do { + wtime.tm_sec = BCD2BIN(rtc->bcd_sec); + wtime.tm_min = BCD2BIN(rtc->bcd_min); + wtime.tm_hour = BCD2BIN(rtc->bcd_hr); + wtime.tm_mday = BCD2BIN(rtc->bcd_dom); + wtime.tm_mon = BCD2BIN(rtc->bcd_mth)-1; + wtime.tm_year = BCD2BIN(rtc->bcd_year); + if (wtime.tm_year < 70) + wtime.tm_year += 100; + wtime.tm_wday = BCD2BIN(rtc->bcd_dow)-1; + } while (wtime.tm_sec != BCD2BIN(rtc->bcd_sec)); + rtc->msr = msr; + local_irq_restore(flags); + return copy_to_user((void *)arg, &wtime, sizeof wtime) ? + -EFAULT : 0; + } + case RTC_SET_TIME: /* Set the RTC */ + { + struct rtc_time rtc_tm; + unsigned char mon, day, hrs, min, sec, leap_yr; + unsigned int yrs; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + if (copy_from_user(&rtc_tm, (struct rtc_time*)arg, + sizeof(struct rtc_time))) + return -EFAULT; + + yrs = rtc_tm.tm_year; + if (yrs < 1900) + yrs += 1900; + mon = rtc_tm.tm_mon + 1; /* tm_mon starts at zero */ + day = rtc_tm.tm_mday; + hrs = rtc_tm.tm_hour; + min = rtc_tm.tm_min; + sec = rtc_tm.tm_sec; + + leap_yr = ((!(yrs % 4) && (yrs % 100)) || !(yrs % 400)); + + if ((mon > 12) || (mon < 1) || (day == 0)) + return -EINVAL; + + if (day > (days_in_mo[mon] + ((mon == 2) && leap_yr))) + return -EINVAL; + + if ((hrs >= 24) || (min >= 60) || (sec >= 60)) + return -EINVAL; + + if (yrs >= 2070) + return -EINVAL; + + local_irq_save(flags); + /* Ensure clock and real-time-mode-register are accessible */ + msr = rtc->msr & 0xc0; + rtc->msr = 0x40; + + rtc->t0cr_rtmr = yrs%4; + rtc->bcd_tenms = 0; + rtc->bcd_sec = BIN2BCD(sec); + rtc->bcd_min = BIN2BCD(min); + rtc->bcd_hr = BIN2BCD(hrs); + rtc->bcd_dom = BIN2BCD(day); + rtc->bcd_mth = BIN2BCD(mon); + rtc->bcd_year = BIN2BCD(yrs%100); + if (rtc_tm.tm_wday >= 0) + rtc->bcd_dow = BIN2BCD(rtc_tm.tm_wday+1); + rtc->t0cr_rtmr = yrs%4 | 0x08; + + rtc->msr = msr; + local_irq_restore(flags); + return 0; + } + default: + return -EINVAL; + } +} + +/* + * We enforce only one user at a time here with the open/close. + * Also clear the previous interrupt data on an open, and clean + * up things on a close. + */ + +static int rtc_open(struct inode *inode, struct file *file) +{ + if(rtc_status) + return -EBUSY; + + rtc_status = 1; + return 0; +} + +static int rtc_release(struct inode *inode, struct file *file) +{ + lock_kernel(); + rtc_status = 0; + unlock_kernel(); + return 0; +} + +/* + * The various file operations we support. + */ + +static struct file_operations rtc_fops = { + .ioctl = rtc_ioctl, + .open = rtc_open, + .release = rtc_release, +}; + +static struct miscdevice rtc_dev = { + .minor = RTC_MINOR, + .name = "rtc", + .fops = &rtc_fops +}; + +int __init rtc_DP8570A_init(void) +{ + if (!MACH_IS_BVME6000) + return -ENODEV; + + printk(KERN_INFO "DP8570A Real Time Clock Driver v%s\n", RTC_VERSION); + return misc_register(&rtc_dev); +} + |