diff options
Diffstat (limited to 'arch/m68k/mac/misc.c')
-rw-r--r-- | arch/m68k/mac/misc.c | 651 |
1 files changed, 651 insertions, 0 deletions
diff --git a/arch/m68k/mac/misc.c b/arch/m68k/mac/misc.c new file mode 100644 index 000000000000..5b80d7cd954a --- /dev/null +++ b/arch/m68k/mac/misc.c @@ -0,0 +1,651 @@ +/* + * Miscellaneous Mac68K-specific stuff + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/miscdevice.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/sched.h> +#include <linux/slab.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 <asm/uaccess.h> +#include <asm/io.h> +#include <asm/rtc.h> +#include <asm/system.h> +#include <asm/segment.h> +#include <asm/setup.h> +#include <asm/macintosh.h> +#include <asm/mac_via.h> +#include <asm/mac_oss.h> + +#define BOOTINFO_COMPAT_1_0 +#include <asm/bootinfo.h> +#include <asm/machdep.h> + +/* Offset between Unix time (1970-based) and Mac time (1904-based) */ + +#define RTC_OFFSET 2082844800 + +extern struct mac_booter_data mac_bi_data; +static void (*rom_reset)(void); + +#ifdef CONFIG_ADB +/* + * Return the current time as the number of seconds since January 1, 1904. + */ + +static long adb_read_time(void) +{ + volatile struct adb_request req; + long time; + + adb_request((struct adb_request *) &req, NULL, + ADBREQ_RAW|ADBREQ_SYNC, + 2, CUDA_PACKET, CUDA_GET_TIME); + + time = (req.reply[3] << 24) | (req.reply[4] << 16) + | (req.reply[5] << 8) | req.reply[6]; + return time - RTC_OFFSET; +} + +/* + * Set the current system time + */ + +static void adb_write_time(long data) +{ + volatile struct adb_request req; + + data += RTC_OFFSET; + + adb_request((struct adb_request *) &req, NULL, + ADBREQ_RAW|ADBREQ_SYNC, + 6, CUDA_PACKET, CUDA_SET_TIME, + (data >> 24) & 0xFF, (data >> 16) & 0xFF, + (data >> 8) & 0xFF, data & 0xFF); +} + +/* + * Get a byte from the NVRAM + */ + +static __u8 adb_read_pram(int offset) +{ + volatile struct adb_request req; + + adb_request((struct adb_request *) &req, NULL, + ADBREQ_RAW|ADBREQ_SYNC, + 4, CUDA_PACKET, CUDA_GET_PRAM, + (offset >> 8) & 0xFF, offset & 0xFF); + return req.reply[3]; +} + +/* + * Write a byte to the NVRAM + */ + +static void adb_write_pram(int offset, __u8 data) +{ + volatile struct adb_request req; + + adb_request((struct adb_request *) &req, NULL, + ADBREQ_RAW|ADBREQ_SYNC, + 5, CUDA_PACKET, CUDA_SET_PRAM, + (offset >> 8) & 0xFF, offset & 0xFF, + data); +} +#endif /* CONFIG_ADB */ + +/* + * 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 ct; + + /* + * The NetBSD guys say to loop until you get the same reading + * twice in a row. + */ + + ct = 0; + do { + if (++ct > 10) { + printk("via_read_time: couldn't get valid time, " + "last read = 0x%08lx and 0x%08lx\n", + last_result.idata, result.idata); + break; + } + + last_result.idata = result.idata; + result.idata = 0; + + 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]); + } while (result.idata != last_result.idata); + + return result.idata - RTC_OFFSET; +} + +/* + * 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) +{ + adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC, + 2, CUDA_PACKET, CUDA_RESET_SYSTEM); +} + +static void cuda_shutdown(void) +{ + adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC, + 2, CUDA_PACKET, CUDA_POWERDOWN); +} + +#endif /* CONFIG_ADB_CUDA */ + +#ifdef CONFIG_ADB_PMU + +void pmu_restart(void) +{ + adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC, + 3, PMU_PACKET, PMU_SET_INTR_MASK, + PMU_INT_ADB|PMU_INT_TICK); + + adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC, + 2, PMU_PACKET, PMU_RESET); +} + +void pmu_shutdown(void) +{ + adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC, + 3, PMU_PACKET, PMU_SET_INTR_MASK, + PMU_INT_ADB|PMU_INT_TICK); + + adb_request(NULL, NULL, ADBREQ_RAW|ADBREQ_SYNC, + 6, PMU_PACKET, PMU_SHUTDOWN, + 'M', 'A', 'T', 'T'); +} + +#endif /* CONFIG_ADB_PMU */ + +/* + *------------------------------------------------------------------- + * 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) = NULL; + int i; + + if (macintosh_config->adb_type == MAC_ADB_IISI || + macintosh_config->adb_type == MAC_ADB_PB1 || + macintosh_config->adb_type == MAC_ADB_PB2 || + macintosh_config->adb_type == MAC_ADB_CUDA) { +#ifdef CONFIG_ADB + func = adb_read_pram; +#else + return; +#endif + } else { + func = via_read_pram; + } + for (i = 0 ; i < len ; i++) { + buffer[i] = (*func)(offset++); + } +} + +void mac_pram_write(int offset, __u8 *buffer, int len) +{ + void (*func)(int, __u8) = NULL; + int i; + + if (macintosh_config->adb_type == MAC_ADB_IISI || + macintosh_config->adb_type == MAC_ADB_PB1 || + macintosh_config->adb_type == MAC_ADB_PB2 || + macintosh_config->adb_type == MAC_ADB_CUDA) { +#ifdef CONFIG_ADB + func = adb_write_pram; +#else + return; +#endif + } else { + func = via_write_pram; + } + for (i = 0 ; i < len ; i++) { + (*func)(offset++, buffer[i]); + } +} + +void mac_poweroff(void) +{ + /* + * MAC_ADB_IISI may need to be moved up here if it doesn't actually + * work using the ADB packet method. --David Kilzer + */ + + 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_CUDA) { + cuda_shutdown(); +#endif +#ifdef CONFIG_ADB_PMU + } else if (macintosh_config->adb_type == MAC_ADB_PB1 + || macintosh_config->adb_type == MAC_ADB_PB2) { + pmu_shutdown(); +#endif + } + local_irq_enable(); + printk("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_CUDA) { + cuda_restart(); +#endif +#ifdef CONFIG_ADB_PMU + } 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 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" ((phys&0xFF000000)|0x8777)); + /* 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(); + printk ("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 */ + if (macintosh_config->adb_type == MAC_ADB_II) { + now = via_read_time(); + } else +#ifdef CONFIG_ADB + if ((macintosh_config->adb_type == MAC_ADB_IISI) || + (macintosh_config->adb_type == MAC_ADB_PB1) || + (macintosh_config->adb_type == MAC_ADB_PB2) || + (macintosh_config->adb_type == MAC_ADB_CUDA)) { + now = adb_read_time(); + } else +#endif + if (macintosh_config->adb_type == MAC_ADB_IOP) { + now = via_read_time(); + } else { + 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); + printk("mac_hwclk: read %04d-%02d-%-2d %02d:%02d:%02d\n", + t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec); + } else { /* write */ + printk("mac_hwclk: tried to write %04d-%02d-%-2d %02d:%02d:%02d\n", + t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec); + +#if 0 /* it trashes my rtc */ + now = mktime(t->tm_year + 1900, t->tm_mon + 1, t->tm_mday, + t->tm_hour, t->tm_min, t->tm_sec); + + if (macintosh_config->adb_type == MAC_ADB_II) { + via_write_time(now); + } else if ((macintosh_config->adb_type == MAC_ADB_IISI) || + (macintosh_config->adb_type == MAC_ADB_PB1) || + (macintosh_config->adb_type == MAC_ADB_PB2) || + (macintosh_config->adb_type == MAC_ADB_CUDA)) { + adb_write_time(now); + } else if (macintosh_config->adb_type == MAC_ADB_IOP) { + via_write_time(now); + } +#endif + } + 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; +} |