[mirror_ubuntu-jammy-kernel.git] / arch / m68k / mac / misc.c

/*
 * Miscellaneous Mac68K-specific stuff
 */

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/rtc.h>
#include <linux/mm.h>

#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>

#include <linux/uaccess.h>
#include <asm/io.h>
#include <asm/segment.h>
#include <asm/setup.h>
#include <asm/macintosh.h>
#include <asm/mac_via.h>
#include <asm/mac_oss.h>

#include <asm/machdep.h>

/* Offset between Unix time (1970-based) and Mac time (1904-based) */

#define RTC_OFFSET 2082844800

static void (*rom_reset)(void);

#ifdef CONFIG_ADB_CUDA
static long cuda_read_time(void)
{
	struct adb_request req;
	long time;

	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
		return 0;
	while (!req.complete)
		cuda_poll();

	time = (req.reply[3] << 24) | (req.reply[4] << 16)
		| (req.reply[5] << 8) | req.reply[6];
	return time - RTC_OFFSET;
}

static void cuda_write_time(long data)
{
	struct adb_request req;
	data += RTC_OFFSET;
	if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
			(data >> 24) & 0xFF, (data >> 16) & 0xFF,
			(data >> 8) & 0xFF, data & 0xFF) < 0)
		return;
	while (!req.complete)
		cuda_poll();
}

static __u8 cuda_read_pram(int offset)
{
	struct adb_request req;
	if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
			(offset >> 8) & 0xFF, offset & 0xFF) < 0)
		return 0;
	while (!req.complete)
		cuda_poll();
	return req.reply[3];
}

static void cuda_write_pram(int offset, __u8 data)
{
	struct adb_request req;
	if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
			(offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
		return;
	while (!req.complete)
		cuda_poll();
}
#else
#define cuda_read_time() 0
#define cuda_write_time(n)
#define cuda_read_pram NULL
#define cuda_write_pram NULL
#endif

#ifdef CONFIG_ADB_PMU68K
static long pmu_read_time(void)
{
	struct adb_request req;
	long time;

	if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
		return 0;
	while (!req.complete)
		pmu_poll();

	time = (req.reply[1] << 24) | (req.reply[2] << 16)
		| (req.reply[3] << 8) | req.reply[4];
	return time - RTC_OFFSET;
}

static void pmu_write_time(long data)
{
	struct adb_request req;
	data += RTC_OFFSET;
	if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
			(data >> 24) & 0xFF, (data >> 16) & 0xFF,
			(data >> 8) & 0xFF, data & 0xFF) < 0)
		return;
	while (!req.complete)
		pmu_poll();
}

static __u8 pmu_read_pram(int offset)
{
	struct adb_request req;
	if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
			(offset >> 8) & 0xFF, offset & 0xFF) < 0)
		return 0;
	while (!req.complete)
		pmu_poll();
	return req.reply[3];
}

static void pmu_write_pram(int offset, __u8 data)
{
	struct adb_request req;
	if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
			(offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
		return;
	while (!req.complete)
		pmu_poll();
}
#else
#define pmu_read_time() 0
#define pmu_write_time(n)
#define pmu_read_pram NULL
#define pmu_write_pram NULL
#endif

/*
 * VIA PRAM/RTC access routines
 *
 * Must be called with interrupts disabled and
 * the RTC should be enabled.
 */

static __u8 via_pram_readbyte(void)
{
	int	i,reg;
	__u8	data;

	reg = via1[vBufB] & ~VIA1B_vRTCClk;

	/* Set the RTC data line to be an input. */

	via1[vDirB] &= ~VIA1B_vRTCData;

	/* The bits of the byte come out in MSB order */

	data = 0;
	for (i = 0 ; i < 8 ; i++) {
		via1[vBufB] = reg;
		via1[vBufB] = reg | VIA1B_vRTCClk;
		data = (data << 1) | (via1[vBufB] & VIA1B_vRTCData);
	}

	/* Return RTC data line to output state */

	via1[vDirB] |= VIA1B_vRTCData;

	return data;
}

static void via_pram_writebyte(__u8 data)
{
	int	i,reg,bit;

	reg = via1[vBufB] & ~(VIA1B_vRTCClk | VIA1B_vRTCData);

	/* The bits of the byte go in in MSB order */

	for (i = 0 ; i < 8 ; i++) {
		bit = data & 0x80? 1 : 0;
		data <<= 1;
		via1[vBufB] = reg | bit;
		via1[vBufB] = reg | bit | VIA1B_vRTCClk;
	}
}

/*
 * Execute a VIA PRAM/RTC command. For read commands
 * data should point to a one-byte buffer for the
 * resulting data. For write commands it should point
 * to the data byte to for the command.
 *
 * This function disables all interrupts while running.
 */

static void via_pram_command(int command, __u8 *data)
{
	unsigned long flags;
	int	is_read;

	local_irq_save(flags);

	/* Enable the RTC and make sure the strobe line is high */

	via1[vBufB] = (via1[vBufB] | VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;

	if (command & 0xFF00) {		/* extended (two-byte) command */
		via_pram_writebyte((command & 0xFF00) >> 8);
		via_pram_writebyte(command & 0xFF);
		is_read = command & 0x8000;
	} else {			/* one-byte command */
		via_pram_writebyte(command);
		is_read = command & 0x80;
	}
	if (is_read) {
		*data = via_pram_readbyte();
	} else {
		via_pram_writebyte(*data);
	}

	/* All done, disable the RTC */

	via1[vBufB] |= VIA1B_vRTCEnb;

	local_irq_restore(flags);
}

static __u8 via_read_pram(int offset)
{
	return 0;
}

static void via_write_pram(int offset, __u8 data)
{
}

/*
 * Return the current time in seconds since January 1, 1904.
 *
 * This only works on machines with the VIA-based PRAM/RTC, which
 * is basically any machine with Mac II-style ADB.
 */

static long via_read_time(void)
{
	union {
		__u8 cdata[4];
		long idata;
	} result, last_result;
	int count = 1;

	via_pram_command(0x81, &last_result.cdata[3]);
	via_pram_command(0x85, &last_result.cdata[2]);
	via_pram_command(0x89, &last_result.cdata[1]);
	via_pram_command(0x8D, &last_result.cdata[0]);

	/*
	 * The NetBSD guys say to loop until you get the same reading
	 * twice in a row.
	 */

	while (1) {
		via_pram_command(0x81, &result.cdata[3]);
		via_pram_command(0x85, &result.cdata[2]);
		via_pram_command(0x89, &result.cdata[1]);
		via_pram_command(0x8D, &result.cdata[0]);

		if (result.idata == last_result.idata)
			return result.idata - RTC_OFFSET;

		if (++count > 10)
			break;

		last_result.idata = result.idata;
	}

	pr_err("via_read_time: failed to read a stable value; got 0x%08lx then 0x%08lx\n",
	       last_result.idata, result.idata);

	return 0;
}

/*
 * Set the current time to a number of seconds since January 1, 1904.
 *
 * This only works on machines with the VIA-based PRAM/RTC, which
 * is basically any machine with Mac II-style ADB.
 */

static void via_write_time(long time)
{
	union {
		__u8  cdata[4];
		long  idata;
	} data;
	__u8	temp;

	/* Clear the write protect bit */

	temp = 0x55;
	via_pram_command(0x35, &temp);

	data.idata = time + RTC_OFFSET;
	via_pram_command(0x01, &data.cdata[3]);
	via_pram_command(0x05, &data.cdata[2]);
	via_pram_command(0x09, &data.cdata[1]);
	via_pram_command(0x0D, &data.cdata[0]);

	/* Set the write protect bit */

	temp = 0xD5;
	via_pram_command(0x35, &temp);
}

static void via_shutdown(void)
{
	if (rbv_present) {
		via2[rBufB] &= ~0x04;
	} else {
		/* Direction of vDirB is output */
		via2[vDirB] |= 0x04;
		/* Send a value of 0 on that line */
		via2[vBufB] &= ~0x04;
		mdelay(1000);
	}
}

/*
 * FIXME: not sure how this is supposed to work exactly...
 */

static void oss_shutdown(void)
{
	oss->rom_ctrl = OSS_POWEROFF;
}

#ifdef CONFIG_ADB_CUDA

static void cuda_restart(void)
{
	struct adb_request req;
	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
		return;
	while (!req.complete)
		cuda_poll();
}

static void cuda_shutdown(void)
{
	struct adb_request req;
	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
		return;

	/* Avoid infinite polling loop when PSU is not under Cuda control */
	switch (macintosh_config->ident) {
	case MAC_MODEL_C660:
	case MAC_MODEL_Q605:
	case MAC_MODEL_Q605_ACC:
	case MAC_MODEL_P475:
	case MAC_MODEL_P475F:
		return;
	}

	while (!req.complete)
		cuda_poll();
}

#endif /* CONFIG_ADB_CUDA */

#ifdef CONFIG_ADB_PMU68K

void pmu_restart(void)
{
	struct adb_request req;
	if (pmu_request(&req, NULL,
			2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
		return;
	while (!req.complete)
		pmu_poll();
	if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
		return;
	while (!req.complete)
		pmu_poll();
}

void pmu_shutdown(void)
{
	struct adb_request req;
	if (pmu_request(&req, NULL,
			2, PMU_SET_INTR_MASK, PMU_INT_ADB|PMU_INT_TICK) < 0)
		return;
	while (!req.complete)
		pmu_poll();
	if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
		return;
	while (!req.complete)
		pmu_poll();
}

#endif

/*
 *-------------------------------------------------------------------
 * Below this point are the generic routines; they'll dispatch to the
 * correct routine for the hardware on which we're running.
 *-------------------------------------------------------------------
 */

void mac_pram_read(int offset, __u8 *buffer, int len)
{
	__u8 (*func)(int);
	int i;

	switch(macintosh_config->adb_type) {
	case MAC_ADB_PB1:
	case MAC_ADB_PB2:
		func = pmu_read_pram; break;
	case MAC_ADB_EGRET:
	case MAC_ADB_CUDA:
		func = cuda_read_pram; break;
	default:
		func = via_read_pram;
	}
	if (!func)
		return;
	for (i = 0 ; i < len ; i++) {
		buffer[i] = (*func)(offset++);
	}
}

void mac_pram_write(int offset, __u8 *buffer, int len)
{
	void (*func)(int, __u8);
	int i;

	switch(macintosh_config->adb_type) {
	case MAC_ADB_PB1:
	case MAC_ADB_PB2:
		func = pmu_write_pram; break;
	case MAC_ADB_EGRET:
	case MAC_ADB_CUDA:
		func = cuda_write_pram; break;
	default:
		func = via_write_pram;
	}
	if (!func)
		return;
	for (i = 0 ; i < len ; i++) {
		(*func)(offset++, buffer[i]);
	}
}

void mac_poweroff(void)
{
	if (oss_present) {
		oss_shutdown();
	} else if (macintosh_config->adb_type == MAC_ADB_II) {
		via_shutdown();
#ifdef CONFIG_ADB_CUDA
	} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
	           macintosh_config->adb_type == MAC_ADB_CUDA) {
		cuda_shutdown();
#endif
#ifdef CONFIG_ADB_PMU68K
	} else if (macintosh_config->adb_type == MAC_ADB_PB1
		|| macintosh_config->adb_type == MAC_ADB_PB2) {
		pmu_shutdown();
#endif
	}
	local_irq_enable();
	pr_crit("It is now safe to turn off your Macintosh.\n");
	while(1);
}

void mac_reset(void)
{
	if (macintosh_config->adb_type == MAC_ADB_II) {
		unsigned long flags;

		/* need ROMBASE in booter */
		/* indeed, plus need to MAP THE ROM !! */

		if (mac_bi_data.rombase == 0)
			mac_bi_data.rombase = 0x40800000;

		/* works on some */
		rom_reset = (void *) (mac_bi_data.rombase + 0xa);

		if (macintosh_config->ident == MAC_MODEL_SE30) {
			/*
			 * MSch: Machines known to crash on ROM reset ...
			 */
		} else {
			local_irq_save(flags);

			rom_reset();

			local_irq_restore(flags);
		}
#ifdef CONFIG_ADB_CUDA
	} else if (macintosh_config->adb_type == MAC_ADB_EGRET ||
	           macintosh_config->adb_type == MAC_ADB_CUDA) {
		cuda_restart();
#endif
#ifdef CONFIG_ADB_PMU68K
	} else if (macintosh_config->adb_type == MAC_ADB_PB1
		|| macintosh_config->adb_type == MAC_ADB_PB2) {
		pmu_restart();
#endif
	} else if (CPU_IS_030) {

		/* 030-specific reset routine.  The idea is general, but the
		 * specific registers to reset are '030-specific.  Until I
		 * have a non-030 machine, I can't test anything else.
		 *  -- C. Scott Ananian <cananian@alumni.princeton.edu>
		 */

		unsigned long rombase = 0x40000000;

		/* make a 1-to-1 mapping, using the transparent tran. reg. */
		unsigned long virt = (unsigned long) mac_reset;
		unsigned long phys = virt_to_phys(mac_reset);
		unsigned long addr = (phys&0xFF000000)|0x8777;
		unsigned long offset = phys-virt;
		local_irq_disable(); /* lets not screw this up, ok? */
		__asm__ __volatile__(".chip 68030\n\t"
				     "pmove %0,%/tt0\n\t"
				     ".chip 68k"
				     : : "m" (addr));
		/* Now jump to physical address so we can disable MMU */
		__asm__ __volatile__(
                    ".chip 68030\n\t"
		    "lea %/pc@(1f),%/a0\n\t"
		    "addl %0,%/a0\n\t"/* fixup target address and stack ptr */
		    "addl %0,%/sp\n\t"
		    "pflusha\n\t"
		    "jmp %/a0@\n\t" /* jump into physical memory */
		    "0:.long 0\n\t" /* a constant zero. */
		    /* OK.  Now reset everything and jump to reset vector. */
		    "1:\n\t"
		    "lea %/pc@(0b),%/a0\n\t"
		    "pmove %/a0@, %/tc\n\t" /* disable mmu */
		    "pmove %/a0@, %/tt0\n\t" /* disable tt0 */
		    "pmove %/a0@, %/tt1\n\t" /* disable tt1 */
		    "movel #0, %/a0\n\t"
		    "movec %/a0, %/vbr\n\t" /* clear vector base register */
		    "movec %/a0, %/cacr\n\t" /* disable caches */
		    "movel #0x0808,%/a0\n\t"
		    "movec %/a0, %/cacr\n\t" /* flush i&d caches */
		    "movew #0x2700,%/sr\n\t" /* set up status register */
		    "movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
		    "movec %/a0, %/isp\n\t"
		    "movel %1@(0x4),%/a0\n\t" /* load reset vector */
		    "reset\n\t" /* reset external devices */
		    "jmp %/a0@\n\t" /* jump to the reset vector */
		    ".chip 68k"
		    : : "r" (offset), "a" (rombase) : "a0");
	}

	/* should never get here */
	local_irq_enable();
	pr_crit("Restart failed. Please restart manually.\n");
	while(1);
}

/*
 * This function translates seconds since 1970 into a proper date.
 *
 * Algorithm cribbed from glibc2.1, __offtime().
 */
#define SECS_PER_MINUTE (60)
#define SECS_PER_HOUR  (SECS_PER_MINUTE * 60)
#define SECS_PER_DAY   (SECS_PER_HOUR * 24)

static void unmktime(unsigned long time, long offset,
		     int *yearp, int *monp, int *dayp,
		     int *hourp, int *minp, int *secp)
{
        /* How many days come before each month (0-12).  */
	static const unsigned short int __mon_yday[2][13] =
	{
		/* Normal years.  */
		{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
		/* Leap years.  */
		{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
	};
	long int days, rem, y, wday, yday;
	const unsigned short int *ip;

	days = time / SECS_PER_DAY;
	rem = time % SECS_PER_DAY;
	rem += offset;
	while (rem < 0) {
		rem += SECS_PER_DAY;
		--days;
	}
	while (rem >= SECS_PER_DAY) {
		rem -= SECS_PER_DAY;
		++days;
	}
	*hourp = rem / SECS_PER_HOUR;
	rem %= SECS_PER_HOUR;
	*minp = rem / SECS_PER_MINUTE;
	*secp = rem % SECS_PER_MINUTE;
	/* January 1, 1970 was a Thursday. */
	wday = (4 + days) % 7; /* Day in the week. Not currently used */
	if (wday < 0) wday += 7;
	y = 1970;

#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
#define __isleap(year)	\
  ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))

	while (days < 0 || days >= (__isleap (y) ? 366 : 365))
	{
		/* Guess a corrected year, assuming 365 days per year.  */
		long int yg = y + days / 365 - (days % 365 < 0);

		/* Adjust DAYS and Y to match the guessed year.  */
		days -= ((yg - y) * 365
			 + LEAPS_THRU_END_OF (yg - 1)
			 - LEAPS_THRU_END_OF (y - 1));
		y = yg;
	}
	*yearp = y - 1900;
	yday = days; /* day in the year.  Not currently used. */
	ip = __mon_yday[__isleap(y)];
	for (y = 11; days < (long int) ip[y]; --y)
		continue;
	days -= ip[y];
	*monp = y;
	*dayp = days + 1; /* day in the month */
	return;
}

/*
 * Read/write the hardware clock.
 */

int mac_hwclk(int op, struct rtc_time *t)
{
	unsigned long now;

	if (!op) { /* read */
		switch (macintosh_config->adb_type) {
		case MAC_ADB_II:
		case MAC_ADB_IOP:
			now = via_read_time();
			break;
		case MAC_ADB_PB1:
		case MAC_ADB_PB2:
			now = pmu_read_time();
			break;
		case MAC_ADB_EGRET:
		case MAC_ADB_CUDA:
			now = cuda_read_time();
			break;
		default:
			now = 0;
		}

		t->tm_wday = 0;
		unmktime(now, 0,
			 &t->tm_year, &t->tm_mon, &t->tm_mday,
			 &t->tm_hour, &t->tm_min, &t->tm_sec);
		pr_debug("%s: read %04d-%02d-%-2d %02d:%02d:%02d\n",
		         __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
		         t->tm_hour, t->tm_min, t->tm_sec);
	} else { /* write */
		pr_debug("%s: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
		         __func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
		         t->tm_hour, t->tm_min, t->tm_sec);

		now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
			     t->tm_hour, t->tm_min, t->tm_sec);

		switch (macintosh_config->adb_type) {
		case MAC_ADB_II:
		case MAC_ADB_IOP:
			via_write_time(now);
			break;
		case MAC_ADB_EGRET:
		case MAC_ADB_CUDA:
			cuda_write_time(now);
			break;
		case MAC_ADB_PB1:
		case MAC_ADB_PB2:
			pmu_write_time(now);
			break;
		}
	}
	return 0;
}

/*
 * Set minutes/seconds in the hardware clock
 */

int mac_set_clock_mmss (unsigned long nowtime)
{
	struct rtc_time now;

	mac_hwclk(0, &now);
	now.tm_sec = nowtime % 60;
	now.tm_min = (nowtime / 60) % 60;
	mac_hwclk(1, &now);

	return 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Miscellaneous Mac68K-specific stuff
	3	*/
	4
1da177e4 LT	5	#include <linux/types.h>
1da177e4 LT	6	#include <linux/errno.h>
1da177e4 LT	7	#include <linux/kernel.h>
	8	#include <linux/delay.h>
	9	#include <linux/sched.h>
1da177e4 LT	10	#include <linux/time.h>
	11	#include <linux/rtc.h>
	12	#include <linux/mm.h>
	13
	14	#include <linux/adb.h>
	15	#include <linux/cuda.h>
	16	#include <linux/pmu.h>
	17
7c0f6ba6	18	#include <linux/uaccess.h>
1da177e4	19	#include <asm/io.h>
1da177e4 LT	20	#include <asm/segment.h>
	21	#include <asm/setup.h>
	22	#include <asm/macintosh.h>
	23	#include <asm/mac_via.h>
	24	#include <asm/mac_oss.h>
	25
1da177e4 LT	26	#include <asm/machdep.h>
	27
	28	/* Offset between Unix time (1970-based) and Mac time (1904-based) */
	29
	30	#define RTC_OFFSET 2082844800
	31
1da177e4 LT	32	static void (*rom_reset)(void);
1da177e4 LT	33
3272244c AV	34	#ifdef CONFIG_ADB_CUDA
3272244c AV	35	static long cuda_read_time(void)
1da177e4	36	{
3272244c	37	struct adb_request req;
1da177e4 LT	38	long time;
1da177e4 LT	39
3272244c AV	40	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_GET_TIME) < 0)
	41	return 0;
	42	while (!req.complete)
	43	cuda_poll();
1da177e4 LT	44
	45	time = (req.reply[3] << 24) \| (req.reply[4] << 16)
	46	\| (req.reply[5] << 8) \| req.reply[6];
	47	return time - RTC_OFFSET;
	48	}
	49
3272244c AV	50	static void cuda_write_time(long data)
	51	{
	52	struct adb_request req;
	53	data += RTC_OFFSET;
	54	if (cuda_request(&req, NULL, 6, CUDA_PACKET, CUDA_SET_TIME,
	55	(data >> 24) & 0xFF, (data >> 16) & 0xFF,
	56	(data >> 8) & 0xFF, data & 0xFF) < 0)
	57	return;
	58	while (!req.complete)
	59	cuda_poll();
	60	}
1da177e4	61
3272244c	62	static __u8 cuda_read_pram(int offset)
1da177e4	63	{
3272244c AV	64	struct adb_request req;
	65	if (cuda_request(&req, NULL, 4, CUDA_PACKET, CUDA_GET_PRAM,
	66	(offset >> 8) & 0xFF, offset & 0xFF) < 0)
	67	return 0;
	68	while (!req.complete)
	69	cuda_poll();
	70	return req.reply[3];
	71	}
1da177e4	72
3272244c AV	73	static void cuda_write_pram(int offset, __u8 data)
	74	{
	75	struct adb_request req;
	76	if (cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_SET_PRAM,
	77	(offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
	78	return;
	79	while (!req.complete)
	80	cuda_poll();
	81	}
	82	#else
	83	#define cuda_read_time() 0
	84	#define cuda_write_time(n)
	85	#define cuda_read_pram NULL
	86	#define cuda_write_pram NULL
	87	#endif
	88
d643e2d2	89	#ifdef CONFIG_ADB_PMU68K
3272244c AV	90	static long pmu_read_time(void)
	91	{
	92	struct adb_request req;
	93	long time;
	94
	95	if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
	96	return 0;
	97	while (!req.complete)
	98	pmu_poll();
1da177e4	99
d643e2d2 FT	100	time = (req.reply[1] << 24) \| (req.reply[2] << 16)
d643e2d2 FT	101	\| (req.reply[3] << 8) \| req.reply[4];
3272244c AV	102	return time - RTC_OFFSET;
	103	}
	104
	105	static void pmu_write_time(long data)
	106	{
	107	struct adb_request req;
	108	data += RTC_OFFSET;
	109	if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
1da177e4	110	(data >> 24) & 0xFF, (data >> 16) & 0xFF,
3272244c AV	111	(data >> 8) & 0xFF, data & 0xFF) < 0)
	112	return;
	113	while (!req.complete)
	114	pmu_poll();
1da177e4 LT	115	}
1da177e4 LT	116
3272244c AV	117	static __u8 pmu_read_pram(int offset)
	118	{
	119	struct adb_request req;
	120	if (pmu_request(&req, NULL, 3, PMU_READ_NVRAM,
	121	(offset >> 8) & 0xFF, offset & 0xFF) < 0)
	122	return 0;
	123	while (!req.complete)
	124	pmu_poll();
	125	return req.reply[3];
	126	}
1da177e4	127
3272244c	128	static void pmu_write_pram(int offset, __u8 data)
1da177e4	129	{
3272244c AV	130	struct adb_request req;
	131	if (pmu_request(&req, NULL, 4, PMU_WRITE_NVRAM,
	132	(offset >> 8) & 0xFF, offset & 0xFF, data) < 0)
	133	return;
	134	while (!req.complete)
	135	pmu_poll();
	136	}
	137	#else
	138	#define pmu_read_time() 0
	139	#define pmu_write_time(n)
	140	#define pmu_read_pram NULL
	141	#define pmu_write_pram NULL
	142	#endif
1da177e4	143
1da177e4 LT	144	/*
	145	* VIA PRAM/RTC access routines
	146	*
	147	* Must be called with interrupts disabled and
	148	* the RTC should be enabled.
	149	*/
	150
	151	static __u8 via_pram_readbyte(void)
	152	{
	153	int i,reg;
	154	__u8 data;
	155
	156	reg = via1[vBufB] & ~VIA1B_vRTCClk;
	157
	158	/* Set the RTC data line to be an input. */
	159
	160	via1[vDirB] &= ~VIA1B_vRTCData;
	161
	162	/* The bits of the byte come out in MSB order */
	163
	164	data = 0;
	165	for (i = 0 ; i < 8 ; i++) {
	166	via1[vBufB] = reg;
	167	via1[vBufB] = reg \| VIA1B_vRTCClk;
	168	data = (data << 1) \| (via1[vBufB] & VIA1B_vRTCData);
	169	}
	170
	171	/* Return RTC data line to output state */
	172
	173	via1[vDirB] \|= VIA1B_vRTCData;
	174
	175	return data;
	176	}
	177
	178	static void via_pram_writebyte(__u8 data)
	179	{
	180	int i,reg,bit;
	181
	182	reg = via1[vBufB] & ~(VIA1B_vRTCClk \| VIA1B_vRTCData);
	183
	184	/* The bits of the byte go in in MSB order */
	185
	186	for (i = 0 ; i < 8 ; i++) {
	187	bit = data & 0x80? 1 : 0;
	188	data <<= 1;
	189	via1[vBufB] = reg \| bit;
	190	via1[vBufB] = reg \| bit \| VIA1B_vRTCClk;
	191	}
	192	}
	193
	194	/*
	195	* Execute a VIA PRAM/RTC command. For read commands
	196	* data should point to a one-byte buffer for the
	197	* resulting data. For write commands it should point
	198	* to the data byte to for the command.
	199	*
	200	* This function disables all interrupts while running.
	201	*/
	202
	203	static void via_pram_command(int command, __u8 *data)
	204	{
	205	unsigned long flags;
	206	int is_read;
	207
208	local_irq_save(flags);
209
210	/* Enable the RTC and make sure the strobe line is high */
211
212	via1[vBufB] = (via1[vBufB] \| VIA1B_vRTCClk) & ~VIA1B_vRTCEnb;
213
214	if (command & 0xFF00) { /* extended (two-byte) command */
215	via_pram_writebyte((command & 0xFF00) >> 8);
216	via_pram_writebyte(command & 0xFF);
217	is_read = command & 0x8000;
218	} else { /* one-byte command */
219	via_pram_writebyte(command);
220	is_read = command & 0x80;
221	}
222	if (is_read) {
223	*data = via_pram_readbyte();
224	} else {
225	via_pram_writebyte(*data);
226	}
227
228	/* All done, disable the RTC */
229
230	via1[vBufB] \|= VIA1B_vRTCEnb;
231
232	local_irq_restore(flags);
233	}
234
235	static __u8 via_read_pram(int offset)
236	{
237	return 0;
238	}
239
240	static void via_write_pram(int offset, __u8 data)
241	{
242	}
243
244	/*
245	* Return the current time in seconds since January 1, 1904.
246	*
247	* This only works on machines with the VIA-based PRAM/RTC, which
248	* is basically any machine with Mac II-style ADB.
249	*/
250
251	static long via_read_time(void)
252	{
253	union {
75a23850 FT	254	__u8 cdata[4];
75a23850 FT	255	long idata;
1da177e4	256	} result, last_result;
75a23850 FT	257	int count = 1;
	258
	259	via_pram_command(0x81, &last_result.cdata[3]);
	260	via_pram_command(0x85, &last_result.cdata[2]);
	261	via_pram_command(0x89, &last_result.cdata[1]);
	262	via_pram_command(0x8D, &last_result.cdata[0]);
1da177e4 LT	263
	264	/*
	265	* The NetBSD guys say to loop until you get the same reading
	266	* twice in a row.
	267	*/
	268
75a23850	269	while (1) {
1da177e4 LT	270	via_pram_command(0x81, &result.cdata[3]);
	271	via_pram_command(0x85, &result.cdata[2]);
	272	via_pram_command(0x89, &result.cdata[1]);
	273	via_pram_command(0x8D, &result.cdata[0]);
1da177e4	274
75a23850 FT	275	if (result.idata == last_result.idata)
	276	return result.idata - RTC_OFFSET;
	277
	278	if (++count > 10)
	279	break;
	280
	281	last_result.idata = result.idata;
	282	}
	283
889121b4	284	pr_err("via_read_time: failed to read a stable value; got 0x%08lx then 0x%08lx\n",
75a23850 FT	285	last_result.idata, result.idata);
	286
	287	return 0;
1da177e4 LT	288	}
	289
	290	/*
	291	* Set the current time to a number of seconds since January 1, 1904.
	292	*
	293	* This only works on machines with the VIA-based PRAM/RTC, which
	294	* is basically any machine with Mac II-style ADB.
	295	*/
	296
	297	static void via_write_time(long time)
	298	{
	299	union {
	300	__u8 cdata[4];
	301	long idata;
	302	} data;
	303	__u8 temp;
	304
	305	/* Clear the write protect bit */
	306
	307	temp = 0x55;
	308	via_pram_command(0x35, &temp);
	309
	310	data.idata = time + RTC_OFFSET;
	311	via_pram_command(0x01, &data.cdata[3]);
	312	via_pram_command(0x05, &data.cdata[2]);
	313	via_pram_command(0x09, &data.cdata[1]);
	314	via_pram_command(0x0D, &data.cdata[0]);
	315
	316	/* Set the write protect bit */
	317
	318	temp = 0xD5;
	319	via_pram_command(0x35, &temp);
	320	}
	321
	322	static void via_shutdown(void)
	323	{
	324	if (rbv_present) {
	325	via2[rBufB] &= ~0x04;
	326	} else {
	327	/* Direction of vDirB is output */
	328	via2[vDirB] \|= 0x04;
	329	/* Send a value of 0 on that line */
	330	via2[vBufB] &= ~0x04;
	331	mdelay(1000);
	332	}
	333	}
	334
	335	/*
	336	* FIXME: not sure how this is supposed to work exactly...
	337	*/
	338
	339	static void oss_shutdown(void)
	340	{
	341	oss->rom_ctrl = OSS_POWEROFF;
	342	}
	343
	344	#ifdef CONFIG_ADB_CUDA
	345
	346	static void cuda_restart(void)
	347	{
3272244c AV	348	struct adb_request req;
	349	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM) < 0)
	350	return;
	351	while (!req.complete)
	352	cuda_poll();
1da177e4 LT	353	}
	354
	355	static void cuda_shutdown(void)
	356	{
3272244c AV	357	struct adb_request req;
	358	if (cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN) < 0)
	359	return;
41e93a30 FT	360
	361	/* Avoid infinite polling loop when PSU is not under Cuda control */
	362	switch (macintosh_config->ident) {
	363	case MAC_MODEL_C660:
	364	case MAC_MODEL_Q605:
	365	case MAC_MODEL_Q605_ACC:
	366	case MAC_MODEL_P475:
	367	case MAC_MODEL_P475F:
	368	return;
	369	}
	370
3272244c AV	371	while (!req.complete)
3272244c AV	372	cuda_poll();
1da177e4 LT	373	}
	374
	375	#endif /* CONFIG_ADB_CUDA */
	376
3272244c	377	#ifdef CONFIG_ADB_PMU68K
1da177e4 LT	378
	379	void pmu_restart(void)
	380	{
3272244c AV	381	struct adb_request req;
	382	if (pmu_request(&req, NULL,
	383	2, PMU_SET_INTR_MASK, PMU_INT_ADB\|PMU_INT_TICK) < 0)
	384	return;
	385	while (!req.complete)
	386	pmu_poll();
	387	if (pmu_request(&req, NULL, 1, PMU_RESET) < 0)
	388	return;
	389	while (!req.complete)
	390	pmu_poll();
1da177e4 LT	391	}
	392
	393	void pmu_shutdown(void)
	394	{
3272244c AV	395	struct adb_request req;
	396	if (pmu_request(&req, NULL,
	397	2, PMU_SET_INTR_MASK, PMU_INT_ADB\|PMU_INT_TICK) < 0)
	398	return;
	399	while (!req.complete)
	400	pmu_poll();
	401	if (pmu_request(&req, NULL, 5, PMU_SHUTDOWN, 'M', 'A', 'T', 'T') < 0)
	402	return;
	403	while (!req.complete)
	404	pmu_poll();
1da177e4 LT	405	}
1da177e4 LT	406
3272244c	407	#endif
1da177e4 LT	408
	409	/*
	410	*-------------------------------------------------------------------
	411	* Below this point are the generic routines; they'll dispatch to the
	412	* correct routine for the hardware on which we're running.
	413	*-------------------------------------------------------------------
	414	*/
	415
	416	void mac_pram_read(int offset, __u8 *buffer, int len)
	417	{
3272244c	418	__u8 (*func)(int);
1da177e4 LT	419	int i;
1da177e4 LT	420
3272244c	421	switch(macintosh_config->adb_type) {
3272244c AV	422	case MAC_ADB_PB1:
	423	case MAC_ADB_PB2:
	424	func = pmu_read_pram; break;
f74faec6	425	case MAC_ADB_EGRET:
3272244c AV	426	case MAC_ADB_CUDA:
	427	func = cuda_read_pram; break;
	428	default:
1da177e4 LT	429	func = via_read_pram;
1da177e4 LT	430	}
3272244c AV	431	if (!func)
3272244c AV	432	return;
1da177e4 LT	433	for (i = 0 ; i < len ; i++) {
	434	buffer[i] = (*func)(offset++);
	435	}
	436	}
	437
	438	void mac_pram_write(int offset, __u8 *buffer, int len)
	439	{
3272244c	440	void (*func)(int, __u8);
1da177e4 LT	441	int i;
1da177e4 LT	442
3272244c	443	switch(macintosh_config->adb_type) {
3272244c AV	444	case MAC_ADB_PB1:
	445	case MAC_ADB_PB2:
	446	func = pmu_write_pram; break;
f74faec6	447	case MAC_ADB_EGRET:
3272244c AV	448	case MAC_ADB_CUDA:
	449	func = cuda_write_pram; break;
	450	default:
1da177e4 LT	451	func = via_write_pram;
1da177e4 LT	452	}
3272244c AV	453	if (!func)
3272244c AV	454	return;
1da177e4 LT	455	for (i = 0 ; i < len ; i++) {
	456	(*func)(offset++, buffer[i]);
	457	}
	458	}
	459
	460	void mac_poweroff(void)
	461	{
1da177e4 LT	462	if (oss_present) {
	463	oss_shutdown();
	464	} else if (macintosh_config->adb_type == MAC_ADB_II) {
	465	via_shutdown();
	466	#ifdef CONFIG_ADB_CUDA
f74faec6 FT	467	} else if (macintosh_config->adb_type == MAC_ADB_EGRET \|\|
f74faec6 FT	468	macintosh_config->adb_type == MAC_ADB_CUDA) {
1da177e4 LT	469	cuda_shutdown();
1da177e4 LT	470	#endif
3272244c	471	#ifdef CONFIG_ADB_PMU68K
1da177e4 LT	472	} else if (macintosh_config->adb_type == MAC_ADB_PB1
	473	\|\| macintosh_config->adb_type == MAC_ADB_PB2) {
	474	pmu_shutdown();
	475	#endif
	476	}
	477	local_irq_enable();
889121b4	478	pr_crit("It is now safe to turn off your Macintosh.\n");
1da177e4 LT	479	while(1);
	480	}
	481
	482	void mac_reset(void)
	483	{
	484	if (macintosh_config->adb_type == MAC_ADB_II) {
	485	unsigned long flags;
	486
	487	/* need ROMBASE in booter */
	488	/* indeed, plus need to MAP THE ROM !! */
	489
	490	if (mac_bi_data.rombase == 0)
	491	mac_bi_data.rombase = 0x40800000;
	492
	493	/* works on some */
	494	rom_reset = (void *) (mac_bi_data.rombase + 0xa);
	495
	496	if (macintosh_config->ident == MAC_MODEL_SE30) {
	497	/*
	498	* MSch: Machines known to crash on ROM reset ...
	499	*/
	500	} else {
	501	local_irq_save(flags);
	502
	503	rom_reset();
	504
	505	local_irq_restore(flags);
	506	}
	507	#ifdef CONFIG_ADB_CUDA
f74faec6 FT	508	} else if (macintosh_config->adb_type == MAC_ADB_EGRET \|\|
f74faec6 FT	509	macintosh_config->adb_type == MAC_ADB_CUDA) {
1da177e4 LT	510	cuda_restart();
1da177e4 LT	511	#endif
3272244c	512	#ifdef CONFIG_ADB_PMU68K
1da177e4 LT	513	} else if (macintosh_config->adb_type == MAC_ADB_PB1
	514	\|\| macintosh_config->adb_type == MAC_ADB_PB2) {
	515	pmu_restart();
	516	#endif
	517	} else if (CPU_IS_030) {
	518
	519	/* 030-specific reset routine. The idea is general, but the
	520	* specific registers to reset are '030-specific. Until I
	521	* have a non-030 machine, I can't test anything else.
	522	* -- C. Scott Ananian <cananian@alumni.princeton.edu>
	523	*/
	524
	525	unsigned long rombase = 0x40000000;
	526
	527	/* make a 1-to-1 mapping, using the transparent tran. reg. */
	528	unsigned long virt = (unsigned long) mac_reset;
	529	unsigned long phys = virt_to_phys(mac_reset);
77add9f3	530	unsigned long addr = (phys&0xFF000000)\|0x8777;
1da177e4 LT	531	unsigned long offset = phys-virt;
	532	local_irq_disable(); /* lets not screw this up, ok? */
	533	__asm__ __volatile__(".chip 68030\n\t"
	534	"pmove %0,%/tt0\n\t"
	535	".chip 68k"
77add9f3	536	: : "m" (addr));
1da177e4 LT	537	/* Now jump to physical address so we can disable MMU */
	538	__asm__ __volatile__(
	539	".chip 68030\n\t"
	540	"lea %/pc@(1f),%/a0\n\t"
	541	"addl %0,%/a0\n\t"/* fixup target address and stack ptr */
	542	"addl %0,%/sp\n\t"
	543	"pflusha\n\t"
	544	"jmp %/a0@\n\t" /* jump into physical memory */
	545	"0:.long 0\n\t" /* a constant zero. */
	546	/* OK. Now reset everything and jump to reset vector. */
	547	"1:\n\t"
	548	"lea %/pc@(0b),%/a0\n\t"
	549	"pmove %/a0@, %/tc\n\t" /* disable mmu */
	550	"pmove %/a0@, %/tt0\n\t" /* disable tt0 */
	551	"pmove %/a0@, %/tt1\n\t" /* disable tt1 */
	552	"movel #0, %/a0\n\t"
	553	"movec %/a0, %/vbr\n\t" /* clear vector base register */
	554	"movec %/a0, %/cacr\n\t" /* disable caches */
	555	"movel #0x0808,%/a0\n\t"
	556	"movec %/a0, %/cacr\n\t" /* flush i&d caches */
	557	"movew #0x2700,%/sr\n\t" /* set up status register */
	558	"movel %1@(0x0),%/a0\n\t"/* load interrupt stack pointer */
	559	"movec %/a0, %/isp\n\t"
	560	"movel %1@(0x4),%/a0\n\t" /* load reset vector */
	561	"reset\n\t" /* reset external devices */
	562	"jmp %/a0@\n\t" /* jump to the reset vector */
	563	".chip 68k"
	564	: : "r" (offset), "a" (rombase) : "a0");
	565	}
	566
	567	/* should never get here */
	568	local_irq_enable();
889121b4	569	pr_crit("Restart failed. Please restart manually.\n");
1da177e4 LT	570	while(1);
	571	}
	572
	573	/*
	574	* This function translates seconds since 1970 into a proper date.
	575	*
	576	* Algorithm cribbed from glibc2.1, __offtime().
	577	*/
	578	#define SECS_PER_MINUTE (60)
	579	#define SECS_PER_HOUR (SECS_PER_MINUTE * 60)
	580	#define SECS_PER_DAY (SECS_PER_HOUR * 24)
	581
	582	static void unmktime(unsigned long time, long offset,
	583	int yearp, int monp, int *dayp,
	584	int hourp, int minp, int *secp)
	585	{
	586	/* How many days come before each month (0-12). */
	587	static const unsigned short int __mon_yday[2][13] =
	588	{
	589	/* Normal years. */
	590	{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
	591	/* Leap years. */
	592	{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
	593	};
	594	long int days, rem, y, wday, yday;
	595	const unsigned short int *ip;
	596
	597	days = time / SECS_PER_DAY;
	598	rem = time % SECS_PER_DAY;
	599	rem += offset;
	600	while (rem < 0) {
	601	rem += SECS_PER_DAY;
	602	--days;
	603	}
	604	while (rem >= SECS_PER_DAY) {
	605	rem -= SECS_PER_DAY;
	606	++days;
	607	}
	608	*hourp = rem / SECS_PER_HOUR;
	609	rem %= SECS_PER_HOUR;
	610	*minp = rem / SECS_PER_MINUTE;
	611	*secp = rem % SECS_PER_MINUTE;
	612	/* January 1, 1970 was a Thursday. */
	613	wday = (4 + days) % 7; /* Day in the week. Not currently used */
	614	if (wday < 0) wday += 7;
	615	y = 1970;
	616
	617	#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
	618	#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
	619	#define __isleap(year) \
	620	((year) % 4 == 0 && ((year) % 100 != 0 \|\| (year) % 400 == 0))
	621
	622	while (days < 0 \|\| days >= (__isleap (y) ? 366 : 365))
	623	{
	624	/* Guess a corrected year, assuming 365 days per year. */
	625	long int yg = y + days / 365 - (days % 365 < 0);
	626
	627	/* Adjust DAYS and Y to match the guessed year. */
	628	days -= ((yg - y) * 365
	629	+ LEAPS_THRU_END_OF (yg - 1)
	630	- LEAPS_THRU_END_OF (y - 1));
	631	y = yg;
	632	}
	633	*yearp = y - 1900;
634	yday = days; /* day in the year. Not currently used. */
635	ip = __mon_yday[__isleap(y)];
636	for (y = 11; days < (long int) ip[y]; --y)
637	continue;
638	days -= ip[y];
639	*monp = y;
640	dayp = days + 1; / day in the month */
641	return;
642	}
643
644	/*
645	* Read/write the hardware clock.
646	*/
647
648	int mac_hwclk(int op, struct rtc_time *t)
649	{
650	unsigned long now;
651
652	if (!op) { /* read */
3272244c AV	653	switch (macintosh_config->adb_type) {
	654	case MAC_ADB_II:
	655	case MAC_ADB_IOP:
1da177e4	656	now = via_read_time();
3272244c	657	break;
3272244c AV	658	case MAC_ADB_PB1:
	659	case MAC_ADB_PB2:
	660	now = pmu_read_time();
	661	break;
f74faec6	662	case MAC_ADB_EGRET:
3272244c AV	663	case MAC_ADB_CUDA:
	664	now = cuda_read_time();
	665	break;
	666	default:
1da177e4 LT	667	now = 0;
	668	}
	669
	670	t->tm_wday = 0;
	671	unmktime(now, 0,
	672	&t->tm_year, &t->tm_mon, &t->tm_mday,
	673	&t->tm_hour, &t->tm_min, &t->tm_sec);
889121b4 GU	674	pr_debug("%s: read %04d-%02d-%-2d %02d:%02d:%02d\n",
	675	__func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
	676	t->tm_hour, t->tm_min, t->tm_sec);
1da177e4	677	} else { /* write */
889121b4 GU	678	pr_debug("%s: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n",
	679	__func__, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
	680	t->tm_hour, t->tm_min, t->tm_sec);
1da177e4	681
1da177e4 LT	682	now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
	683	t->tm_hour, t->tm_min, t->tm_sec);
	684
3272244c AV	685	switch (macintosh_config->adb_type) {
	686	case MAC_ADB_II:
	687	case MAC_ADB_IOP:
1da177e4	688	via_write_time(now);
3272244c	689	break;
f74faec6	690	case MAC_ADB_EGRET:
3272244c AV	691	case MAC_ADB_CUDA:
	692	cuda_write_time(now);
	693	break;
	694	case MAC_ADB_PB1:
	695	case MAC_ADB_PB2:
	696	pmu_write_time(now);
	697	break;
1da177e4	698	}
1da177e4 LT	699	}
	700	return 0;
	701	}
	702
	703	/*
	704	* Set minutes/seconds in the hardware clock
	705	*/
	706
	707	int mac_set_clock_mmss (unsigned long nowtime)
	708	{
	709	struct rtc_time now;
	710
	711	mac_hwclk(0, &now);
	712	now.tm_sec = nowtime % 60;
	713	now.tm_min = (nowtime / 60) % 60;
	714	mac_hwclk(1, &now);
	715
	716	return 0;
	717	}