summaryrefslogtreecommitdiffstats
path: root/arch/m68k/mac/via6522.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/mac/via6522.c')
-rw-r--r--arch/m68k/mac/via6522.c419
1 files changed, 0 insertions, 419 deletions
diff --git a/arch/m68k/mac/via6522.c b/arch/m68k/mac/via6522.c
deleted file mode 100644
index 05e6f44e4..000000000
--- a/arch/m68k/mac/via6522.c
+++ /dev/null
@@ -1,419 +0,0 @@
-/*
- * 6522 Versatile Interface Adapter (VIA)
- *
- * There are two of these on the Mac II. Some IRQ's are vectored
- * via them as are assorted bits and bobs - eg rtc, adb.
- */
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/delay.h>
-
-#include <asm/adb.h>
-#include <asm/bootinfo.h>
-#include <asm/macintosh.h>
-#include <asm/macints.h>
-#include "via6522.h"
-#include <asm/mac_psc.h>
-
-volatile unsigned char *via1=(unsigned char *)VIABASE;
-volatile unsigned char *via2=(unsigned char *)VIABASE2;
-volatile unsigned char *psc=(unsigned char *)PSCBASE;
-
-volatile long *via_memory_bogon=(long *)&via_memory_bogon;
-
-unsigned char via1_clock, via1_datab;
-
-static int rbv=0;
-static int oss=0;
-
-extern void adb_interrupt(int slot, void *via, struct pt_regs *regs);
-
-/*
- * hardware reset vector
- */
-static void (*rom_reset)(void);
-
-/*
- * Timer defs.
- */
-#define MAC_CLOCK_TICK (783300/HZ) /* ticks per HZ */
-#define MAC_CLOCK_LOW (MAC_CLOCK_TICK&0xFF)
-#define MAC_CLOCK_HIGH (MAC_CLOCK_TICK>>8)
-
-
-void via_configure_base(void)
-{
-
- switch(macintosh_config->via_type)
- {
- /*
- * CI, SI, VX, LC
- */
- case MAC_VIA_IIci:
- via1=(void *)0x50F00000;
- via2=(void *)0x50F26000;
- rbv=1;
- if (macintosh_config->ident == MAC_MODEL_IIFX) {
- via2=(void *)0x50F1A000;
- oss=1;
- }
- break;
- /*
- * Quadra and early MacIIs agree on the VIA locations
- */
- case MAC_VIA_QUADRA:
- case MAC_VIA_II:
- via1=(void *)0x50F00000;
- via2=(void *)0x50F02000;
- break;
- default:
- }
-}
-
-
-void via_init_clock(void (*func)(int, void *, struct pt_regs *))
-{
- unsigned char c;
-
- via1_clock=via_read(via1, vACR);
- via1_datab=via_read(via1, vBufB);
-
- /*
- * Tell what MacOS left us with
- */
-
- printk("via_init: boot via1 acr=%X pcr=%X buf_a=%X dir_a=%X buf_b=%X dir_b=%X \n",
- (int)via1_clock, (int)via_read(via1, vPCR),
- (int)via_read(via1, vBufA), (int)via_read(via1, vDirA),
- (int)via_read(via1, vBufB), (int)via_read(via1, vDirB));
-
- if (rbv == 0)
- printk("via_init: boot via2 acr=%X pcr=%X buf_a=%X dir_a=%X buf_b=%X dir_b=%X \n",
- (int)via_read(via2, vACR), (int)via_read(via2, vPCR),
- (int)via_read(via2, vBufA), (int)via_read(via2, vDirA),
- (int)via_read(via2, vBufB), (int)via_read(via2, vDirB));
-
- /*
- * Shut it down
- */
-
- via_write(via1,vIER, 0x7F);
-
- /*
- * Kill the timers
- */
-
- via_write(via1,vT1LL,0);
- via_write(via1,vT1LH,0);
- via_write(via1,vT1CL,0);
- via_write(via1,vT1CH,0);
- via_write(via1,vT2CL,0);
- via_write(via1,vT2CH,0);
-
- /*
- * Now do via2
- */
-
- if(rbv==0)
- {
- via_write(via2,vT1LL,0);
- via_write(via2,vT1LH,0);
- via_write(via2,vT1CL,0);
- via_write(via2,vT1CH,0);
- via_write(via2,vT2CL,0);
- via_write(via2,vT2CH,0);
- via_write(via2,vIER, 0x7F);
- }
- else if (oss==0)
- {
- /*
- * Init the RBV chip a bit
- */
-
- via_write(via2, rIER,0x7F);
- }
-
- /*
- * Disable the timer latches
- */
-
- c=via_read(via1,vACR);
- via_write(via1,vACR,c&0x3F);
-
- if(rbv==0)
- {
- c=via_read(via2,vACR);
- via_write(via2,vACR,c&0x3F);
- }
-
- /*
- * Now start the clock - we want 100Hz
- */
-
- via_write(via1,vACR,via_read(via1,vACR)|0x40);
-
- via_write(via1,vT1LL, MAC_CLOCK_LOW);
- via_write(via1,vT1LH, MAC_CLOCK_HIGH);
- via_write(via1,vT1CL, MAC_CLOCK_LOW);
- via_write(via1,vT1CH, MAC_CLOCK_HIGH);
-
- /*
- * And enable its interrupt
- */
-
- request_irq(IRQ_MAC_TIMER_1, func, IRQ_FLG_LOCK, "timer", func);
-
- /*
- * SE/30: disable video int.
- * XXX: testing for SE/30 VBL
- */
-
- if (macintosh_config->ident == MAC_MODEL_SE30) {
- c = via_read(via1, vBufB);
- via_write(via1, vBufB, c|(0x40));
- c = via_read(via1, vDirB);
- via_write(via1, vDirB, c|(0x40));
- }
-
-#if 0 /* gone to mac_init_IRQ */
- /*
- * Set vPCR for SCSI interrupts.
- *
- * That is: CA1 negative edge int., CA2 indep., positive edge int.;
- * CB1 negative edge int., CB2 indep., positive edge int..
- */
- via_write(via2,vPCR, 0x66);
-#endif
-
-}
-
-/*
- * TBI: get time offset between scheduling timer ticks
- */
-#define TICK_SIZE 10000
-
-/* This is always executed with interrupts disabled. */
-
-unsigned long mac_gettimeoffset (void)
-{
- unsigned long ticks, offset = 0;
-
- /* read VIA1 timer 2 current value */
- ticks = via_read(via1, vT1CL) + (via_read(via1, vT1CH)<<8);
- /* The probability of underflow is less than 2% */
- if (ticks > MAC_CLOCK_TICK - MAC_CLOCK_TICK / 50)
- /* Check for pending timer interrupt in VIA1 IFR */
- if (via_read(via1, vIFR) & 0x40)
- offset = TICK_SIZE;
-
- ticks = MAC_CLOCK_TICK - ticks;
- ticks = ticks * 10000L / MAC_CLOCK_TICK;
-
- return ticks + offset;
-}
-
-/*
- * PSC (AV Macs; level 3-6): initialize interrupt enable registers
- */
-
-void psc_init(void)
-{
- via_write(psc, pIER3, 0x01);
- via_write(psc, pIER4, 0x09);
- via_write(psc, pIER4, 0x86);
- via_write(psc, pIER5, 0x03);
- via_write(psc, pIER6, 0x07);
-}
-
-/*
- * The power switch - yes it's software!
- */
-
-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 (macintosh_config->adb_type == MAC_ADB_II)
- {
- if(rbv) {
- via_write(via2, rBufB, via_read(via2, rBufB)&~0x04);
- } else {
- /* Direction of vDirB is output */
- via_write(via2,vDirB,via_read(via2,vDirB)|0x04);
- /* Send a value of 0 on that line */
- via_write(via2,vBufB,via_read(via2,vBufB)&~0x04);
- /* Otherwise it prints "It is now.." then shuts off */
- mdelay(1000);
- }
-
- /* We should never make it this far... */
- printk ("It is now safe to switch off your machine.\n");
-
- /* XXX - delay do we need to spin here ? */
- while(1); /* Just in case .. */
- }
-
- /*
- * Initially discovered this technique in the Mach kernel of MkLinux in
- * osfmk/src/mach_kernel/ppc/POWERMAC/cuda_power.c. Found equivalent LinuxPPC
- * code in arch/ppc/kernel/setup.c, which also has a PMU technique for PowerBooks!
- * --David Kilzer
- */
-
- else if (macintosh_config->adb_type == MAC_ADB_IISI
- || macintosh_config->adb_type == MAC_ADB_CUDA)
- {
- struct adb_request req;
-
- /*
- * Print our "safe" message before we send the request
- * just in case the request never returns.
- */
-
- printk ("It is now safe to switch off your machine.\n");
-
- adb_request (&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
-
- printk ("ADB powerdown request sent.\n");
- for (;;)
- {
- adb_poll();
- }
- }
-}
-
-/*
- * Not all Macs support software power down; for the rest, just
- * try the ROM reset vector ...
- */
-void mac_reset(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 (macintosh_config->adb_type == MAC_ADB_II)
- {
- unsigned long flags;
- unsigned long *reset_hook;
-
- /* 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 0
- /* testing, doesn't work on SE/30 either */
- reset_hook = (unsigned long *) (mac_bi_data.rombase + 0x4);
- printk("ROM reset hook: %p\n", *reset_hook);
- rom_reset = *reset_hook;
-#endif
- if (macintosh_config->ident == MAC_MODEL_SE30) {
- /*
- * MSch: Machines known to crash on ROM reset ...
- */
- printk("System halted.\n");
- while(1);
- } else {
- save_flags(flags);
- cli();
-
- rom_reset();
-
- restore_flags(flags);
- }
-
- /* We never make it this far... it usually panics above. */
- printk ("Restart failed. Please restart manually.\n");
-
- /* XXX - delay do we need to spin here ? */
- while(1); /* Just in case .. */
- }
-
- /*
- * Initially discovered this technique in the Mach kernel of MkLinux in
- * osfmk/src/mach_kernel/ppc/POWERMAC/cuda_power.c. Found equivalent LinuxPPC
- * code in arch/ppc/kernel/setup.c, which also has a PMU technique!
- * --David Kilzer
- *
- * I suspect the MAC_ADB_CUDA code might work with other ADB types of machines
- * but have no way to test this myself. --DDK
- */
-
- else if (macintosh_config->adb_type == MAC_ADB_IISI
- || macintosh_config->adb_type == MAC_ADB_CUDA)
- {
- struct adb_request req;
-
- adb_request (&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
-
- printk ("Restart failed. Please restart manually.\n");
- for (;;)
- {
- adb_poll();
- }
- }
-}
-
-/*
- * Set up the keyboard
- */
-
-void via_setup_keyboard(void)
-{
-#if 0 /* moved to adb */
- via1_func_tab.vector[2]=adb_interrupt;
-#else
- request_irq(IRQ_MAC_ADB, adb_interrupt, IRQ_FLG_LOCK, "adb interrupt",
- adb_interrupt);
-#endif
-}
-
-/*
- * Floppy hook
- */
-
-void via1_set_head(int head)
-{
- if(head==0)
- via_write(via1, vBufA, via_read(via1, vBufA)&~0x20);
- else
- via_write(via1, vBufA, via_read(via1, vBufA)|0x20);
-}
-
-void nubus_init_via(void)
-{
- if (rbv) {
- if (oss==0) {
- via_write(via2, rBufB, via_read(via2, rBufB)|0x02);
- via_write(via2, rIER, 0x82); /* Interrupts on */
- }
- } else {
- /* Assert the nubus active */
- via_write(via2, vDirB, via_read(via2, vDirB)|0x02);
- via_write(via2, vBufB, via_read(via2, vBufB)|0x02);
- /* Make the nubus interrupt source register all output (disable) */
- /* via_write(via2, vDirA, 0xFF); */
- via_write(via2, vIER, 0x82); /* Interrupts on */
- }
-
- printk("nubus_init_via: via1 acr=%X datab=%X pcr=%X\n",
- (int)via_read(via1, vACR), (int)via_read(via1, vBufB),
- (int)via_read(via1, vPCR));
-
- if (rbv==0)
- printk("nubus_init_via: via2 acr=%X datab=%X pcr=%X\n",
- (int)via_read(via2, vACR), (int)via_read(via2, vBufB),
- (int)via_read(via2, vPCR));
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 22:50:47 +0000