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path: root/drivers/scsi/mvme147.c
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#include <linux/types.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>

#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/mvme147hw.h>
#include <asm/irq.h>

#include "scsi.h"
#include <scsi/scsi_host.h>
#include "wd33c93.h"
#include "mvme147.h"

#include<linux/stat.h>

#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))

static struct Scsi_Host *mvme147_host = NULL;

static irqreturn_t mvme147_intr (int irq, void *dummy)
{
    if (irq == MVME147_IRQ_SCSI_PORT)
	wd33c93_intr (mvme147_host);
    else
	m147_pcc->dma_intr = 0x89;	/* Ack and enable ints */
    return IRQ_HANDLED;
}

static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
{
    unsigned char flags = 0x01;
    unsigned long addr = virt_to_bus(cmd->SCp.ptr);

    /* setup dma direction */
    if (!dir_in)
	flags |= 0x04;

    /* remember direction */
    HDATA(mvme147_host)->dma_dir = dir_in;

    if (dir_in)
  	/* invalidate any cache */
	cache_clear (addr, cmd->SCp.this_residual);
    else
	/* push any dirty cache */
	cache_push (addr, cmd->SCp.this_residual);

    /* start DMA */
    m147_pcc->dma_bcr   = cmd->SCp.this_residual | (1<<24);
    m147_pcc->dma_dadr  = addr;
    m147_pcc->dma_cntrl = flags;

    /* return success */
    return 0;
}

static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
		      int status)
{
    m147_pcc->dma_cntrl = 0;
}

int mvme147_detect(struct scsi_host_template *tpnt)
{
    static unsigned char called = 0;
    wd33c93_regs regs;

    if (!MACH_IS_MVME147 || called)
	return 0;
    called++;

    tpnt->proc_name = "MVME147";
    tpnt->proc_info = &wd33c93_proc_info;

    mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
    if (!mvme147_host)
	    goto err_out;

    mvme147_host->base = 0xfffe4000;
    mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
    regs.SASR = (volatile unsigned char *)0xfffe4000;
    regs.SCMD = (volatile unsigned char *)0xfffe4001;
    wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);

    if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
	    goto err_unregister;
    if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
	    goto err_free_irq;
#if 0	/* Disabled; causes problems booting */
    m147_pcc->scsi_interrupt = 0x10;	/* Assert SCSI bus reset */
    udelay(100);
    m147_pcc->scsi_interrupt = 0x00;	/* Negate SCSI bus reset */
    udelay(2000);
    m147_pcc->scsi_interrupt = 0x40;	/* Clear bus reset interrupt */
#endif
    m147_pcc->scsi_interrupt = 0x09;	/* Enable interrupt */

    m147_pcc->dma_cntrl = 0x00;		/* ensure DMA is stopped */
    m147_pcc->dma_intr = 0x89;		/* Ack and enable ints */

    return 1;

 err_free_irq:
    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
 err_unregister:
    wd33c93_release();
    scsi_unregister(mvme147_host);
 err_out:
    return 0;
}

static int mvme147_bus_reset(struct scsi_cmnd *cmd)
{
	/* FIXME perform bus-specific reset */

	/* FIXME 2: kill this function, and let midlayer fallback to 
	   the same result, calling wd33c93_host_reset() */

	spin_lock_irq(cmd->device->host->host_lock);
	wd33c93_host_reset(cmd);
	spin_unlock_irq(cmd->device->host->host_lock);

	return SUCCESS;
}

#define HOSTS_C

#include "mvme147.h"

static struct scsi_host_template driver_template = {
	.proc_name		= "MVME147",
	.name			= "MVME147 built-in SCSI",
	.detect			= mvme147_detect,
	.release		= mvme147_release,
	.queuecommand		= wd33c93_queuecommand,
	.eh_abort_handler	= wd33c93_abort,
	.eh_bus_reset_handler	= mvme147_bus_reset,
	.eh_host_reset_handler	= wd33c93_host_reset,
	.can_queue		= CAN_QUEUE,
	.this_id		= 7,
	.sg_tablesize		= SG_ALL,
	.cmd_per_lun		= CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING
};


#include "scsi_module.c"

int mvme147_release(struct Scsi_Host *instance)
{
#ifdef MODULE
    /* XXX Make sure DMA is stopped! */
    wd33c93_release();
    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
    free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
#endif
    return 1;
}
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-12 04:23:59 -0400
ccuracy */ #include <linux/module.h> #include <linux/timex.h> #include <linux/capability.h> #include <linux/clocksource.h> #include <linux/errno.h> #include <linux/syscalls.h> #include <linux/security.h> #include <linux/fs.h> #include <linux/math64.h> #include <linux/ptrace.h> #include <asm/uaccess.h> #include <asm/unistd.h> #include "timeconst.h" /* * The timezone where the local system is located. Used as a default by some * programs who obtain this value by using gettimeofday. */ struct timezone sys_tz; EXPORT_SYMBOL(sys_tz); #ifdef __ARCH_WANT_SYS_TIME /* * sys_time() can be implemented in user-level using * sys_gettimeofday(). Is this for backwards compatibility? If so, * why not move it into the appropriate arch directory (for those * architectures that need it). */ SYSCALL_DEFINE1(time, time_t __user *, tloc) { time_t i = get_seconds(); if (tloc) { if (put_user(i,tloc)) return -EFAULT; } force_successful_syscall_return(); return i; } /* * sys_stime() can be implemented in user-level using * sys_settimeofday(). Is this for backwards compatibility? If so, * why not move it into the appropriate arch directory (for those * architectures that need it). */ SYSCALL_DEFINE1(stime, time_t __user *, tptr) { struct timespec tv; int err; if (get_user(tv.tv_sec, tptr)) return -EFAULT; tv.tv_nsec = 0; err = security_settime(&tv, NULL); if (err) return err; do_settimeofday(&tv); return 0; } #endif /* __ARCH_WANT_SYS_TIME */ SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv, struct timezone __user *, tz) { if (likely(tv != NULL)) { struct timeval ktv; do_gettimeofday(&ktv); if (copy_to_user(tv, &ktv, sizeof(ktv))) return -EFAULT; } if (unlikely(tz != NULL)) { if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) return -EFAULT; } return 0; } /* * Adjust the time obtained from the CMOS to be UTC time instead of * local time. * * This is ugly, but preferable to the alternatives. Otherwise we * would either need to write a program to do it in /etc/rc (and risk * confusion if the program gets run more than once; it would also be * hard to make the program warp the clock precisely n hours) or * compile in the timezone information into the kernel. Bad, bad.... * * - TYT, 1992-01-01 * * The best thing to do is to keep the CMOS clock in universal time (UTC) * as real UNIX machines always do it. This avoids all headaches about * daylight saving times and warping kernel clocks. */ static inline void warp_clock(void) { struct timespec adjust; adjust = current_kernel_time(); adjust.tv_sec += sys_tz.tz_minuteswest * 60; do_settimeofday(&adjust); } /* * In case for some reason the CMOS clock has not already been running * in UTC, but in some local time: The first time we set the timezone, * we will warp the clock so that it is ticking UTC time instead of * local time. Presumably, if someone is setting the timezone then we * are running in an environment where the programs understand about * timezones. This should be done at boot time in the /etc/rc script, * as soon as possible, so that the clock can be set right. Otherwise, * various programs will get confused when the clock gets warped. */ int do_sys_settimeofday(struct timespec *tv, struct timezone *tz) { static int firsttime = 1; int error = 0; if (tv && !timespec_valid(tv)) return -EINVAL; error = security_settime(tv, tz); if (error) return error; if (tz) { /* SMP safe, global irq locking makes it work. */ sys_tz = *tz; update_vsyscall_tz(); if (firsttime) { firsttime = 0; if (!tv) warp_clock(); } } if (tv) { /* SMP safe, again the code in arch/foo/time.c should * globally block out interrupts when it runs. */ return do_settimeofday(tv); } return 0; } SYSCALL_DEFINE2(settimeofday, struct timeval __user *, tv, struct timezone __user *, tz) { struct timeval user_tv; struct timespec new_ts; struct timezone new_tz; if (tv) { if (copy_from_user(&user_tv, tv, sizeof(*tv))) return -EFAULT; new_ts.tv_sec = user_tv.tv_sec; new_ts.tv_nsec = user_tv.tv_usec * NSEC_PER_USEC; } if (tz) { if (copy_from_user(&new_tz, tz, sizeof(*tz))) return -EFAULT; } return do_sys_settimeofday(tv ? &new_ts : NULL, tz ? &new_tz : NULL); } SYSCALL_DEFINE1(adjtimex, struct timex __user *, txc_p) { struct timex txc; /* Local copy of parameter */ int ret; /* Copy the user data space into the kernel copy * structure. But bear in mind that the structures * may change */ if(copy_from_user(&txc, txc_p, sizeof(struct timex))) return -EFAULT; ret = do_adjtimex(&txc); return copy_to_user(txc_p, &txc, sizeof(struct timex)) ? -EFAULT : ret; } /** * current_fs_time - Return FS time * @sb: Superblock. * * Return the current time truncated to the time granularity supported by * the fs. */ struct timespec current_fs_time(struct super_block *sb) { struct timespec now = current_kernel_time(); return timespec_trunc(now, sb->s_time_gran); } EXPORT_SYMBOL(current_fs_time); /* * Convert jiffies to milliseconds and back. * * Avoid unnecessary multiplications/divisions in the * two most common HZ cases: */ unsigned int inline jiffies_to_msecs(const unsigned long j) { #if HZ <= MSEC_PER_SEC && !(MSEC_PER_SEC % HZ) return (MSEC_PER_SEC / HZ) * j; #elif HZ > MSEC_PER_SEC && !(HZ % MSEC_PER_SEC) return (j + (HZ / MSEC_PER_SEC) - 1)/(HZ / MSEC_PER_SEC); #else # if BITS_PER_LONG == 32 return (HZ_TO_MSEC_MUL32 * j) >> HZ_TO_MSEC_SHR32; # else return (j * HZ_TO_MSEC_NUM) / HZ_TO_MSEC_DEN; # endif #endif } EXPORT_SYMBOL(jiffies_to_msecs); unsigned int inline jiffies_to_usecs(const unsigned long j) { #if HZ <= USEC_PER_SEC && !(USEC_PER_SEC % HZ) return (USEC_PER_SEC / HZ) * j; #elif HZ > USEC_PER_SEC && !(HZ % USEC_PER_SEC) return (j + (HZ / USEC_PER_SEC) - 1)/(HZ / USEC_PER_SEC); #else # if BITS_PER_LONG == 32 return (HZ_TO_USEC_MUL32 * j) >> HZ_TO_USEC_SHR32; # else return (j * HZ_TO_USEC_NUM) / HZ_TO_USEC_DEN; # endif #endif } EXPORT_SYMBOL(jiffies_to_usecs); /** * timespec_trunc - Truncate timespec to a granularity * @t: Timespec * @gran: Granularity in ns. * * Truncate a timespec to a granularity. gran must be smaller than a second. * Always rounds down. * * This function should be only used for timestamps returned by * current_kernel_time() or CURRENT_TIME, not with do_gettimeofday() because * it doesn't handle the better resolution of the latter. */ struct timespec timespec_trunc(struct timespec t, unsigned gran) { /* * Division is pretty slow so avoid it for common cases. * Currently current_kernel_time() never returns better than * jiffies resolution. Exploit that. */ if (gran <= jiffies_to_usecs(1) * 1000) { /* nothing */ } else if (gran == 1000000000) { t.tv_nsec = 0; } else { t.tv_nsec -= t.tv_nsec % gran; } return t; } EXPORT_SYMBOL(timespec_trunc); #ifndef CONFIG_GENERIC_TIME /* * Simulate gettimeofday using do_gettimeofday which only allows a timeval * and therefore only yields usec accuracy */ void getnstimeofday(struct timespec *tv) { struct timeval x; do_gettimeofday(&x); tv->tv_sec = x.tv_sec; tv->tv_nsec = x.tv_usec * NSEC_PER_USEC; } EXPORT_SYMBOL_GPL(getnstimeofday); #endif /* Converts Gregorian date to seconds since 1970-01-01 00:00:00. * Assumes input in normal date format, i.e. 1980-12-31 23:59:59 * => year=1980, mon=12, day=31, hour=23, min=59, sec=59. * * [For the Julian calendar (which was used in Russia before 1917, * Britain & colonies before 1752, anywhere else before 1582, * and is still in use by some communities) leave out the * -year/100+year/400 terms, and add 10.] * * This algorithm was first published by Gauss (I think). * * WARNING: this function will overflow on 2106-02-07 06:28:16 on * machines where long is 32-bit! (However, as time_t is signed, we * will already get problems at other places on 2038-01-19 03:14:08) */ unsigned long mktime(const unsigned int year0, const unsigned int mon0, const unsigned int day, const unsigned int hour, const unsigned int min, const unsigned int sec) { unsigned int mon = mon0, year = year0; /* 1..12 -> 11,12,1..10 */ if (0 >= (int) (mon -= 2)) { mon += 12; /* Puts Feb last since it has leap day */ year -= 1; } return ((((unsigned long) (year/4 - year/100 + year/400 + 367*mon/12 + day) + year*365 - 719499 )*24 + hour /* now have hours */ )*60 + min /* now have minutes */ )*60 + sec; /* finally seconds */ } EXPORT_SYMBOL(mktime); /** * set_normalized_timespec - set timespec sec and nsec parts and normalize * * @ts: pointer to timespec variable to be set * @sec: seconds to set * @nsec: nanoseconds to set * * Set seconds and nanoseconds field of a timespec variable and * normalize to the timespec storage format * * Note: The tv_nsec part is always in the range of * 0 <= tv_nsec < NSEC_PER_SEC * For negative values only the tv_sec field is negative ! */ void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec) { while (nsec >= NSEC_PER_SEC) { /* * The following asm() prevents the compiler from * optimising this loop into a modulo operation. See * also __iter_div_u64_rem() in include/linux/time.h */ asm("" : "+rm"(nsec)); nsec -= NSEC_PER_SEC; ++sec; } while (nsec < 0) { asm("" : "+rm"(nsec)); nsec += NSEC_PER_SEC; --sec; } ts->tv_sec = sec; ts->tv_nsec = nsec; } EXPORT_SYMBOL(set_normalized_timespec); /** * ns_to_timespec - Convert nanoseconds to timespec * @nsec: the nanoseconds value to be converted * * Returns the timespec representation of the nsec parameter. */ struct timespec ns_to_timespec(const s64 nsec) { struct timespec ts; s32 rem; if (!nsec) return (struct timespec) {0, 0}; ts.tv_sec = div_s64_rem(nsec, NSEC_PER_SEC, &rem);