config.c

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/*
 *  linux/arch/m68k/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 COPYING in the main directory of this archive
 * for more details.
 */

/*
 * Miscellaneous Amiga stuff
 */

#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/kd.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/init.h>
#ifdef CONFIG_ZORRO
#include <linux/zorro.h>
#endif

#include <asm/bootinfo.h>
#include <asm/setup.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
#include <asm/irq.h>
#include <asm/keyboard.h>
#include <asm/machdep.h>
#include <asm/io.h>

unsigned long amiga_model;
unsigned long amiga_eclock;
unsigned long amiga_masterclock;
unsigned long amiga_colorclock;
unsigned long amiga_chipset;
unsigned char amiga_vblank;
unsigned char amiga_psfreq;
struct amiga_hw_present amiga_hw_present;

static const char s_a500[] __initdata = "A500";
static const char s_a500p[] __initdata = "A500+";
static const char s_a600[] __initdata = "A600";
static const char s_a1000[] __initdata = "A1000";
static const char s_a1200[] __initdata = "A1200";
static const char s_a2000[] __initdata = "A2000";
static const char s_a2500[] __initdata = "A2500";
static const char s_a3000[] __initdata = "A3000";
static const char s_a3000t[] __initdata = "A3000T";
static const char s_a3000p[] __initdata = "A3000+";
static const char s_a4000[] __initdata = "A4000";
static const char s_a4000t[] __initdata = "A4000T";
static const char s_cdtv[] __initdata = "CDTV";
static const char s_cd32[] __initdata = "CD32";
static const char s_draco[] __initdata = "Draco";
static const char *amiga_models[] __initdata = {
    s_a500, s_a500p, s_a600, s_a1000, s_a1200, s_a2000, s_a2500, s_a3000,
    s_a3000t, s_a3000p, s_a4000, s_a4000t, s_cdtv, s_cd32, s_draco,
};

static char amiga_model_name[13] = "Amiga ";

extern char m68k_debug_device[];

static void amiga_sched_init(void (*handler)(int, void *, struct pt_regs *));
/* amiga specific keyboard functions */
extern int amiga_keyb_init(void);
extern int amiga_kbdrate (struct kbd_repeat *);
extern int amiga_kbd_translate(unsigned char keycode, unsigned char *keycodep,
			       char raw_mode);
/* amiga specific irq functions */
extern void amiga_init_IRQ (void);
extern void (*amiga_default_handler[]) (int, void *, struct pt_regs *);
extern int amiga_request_irq (unsigned int irq,
			      void (*handler)(int, void *, struct pt_regs *),
                              unsigned long flags, const char *devname,
			      void *dev_id);
extern void amiga_free_irq (unsigned int irq, void *dev_id);
extern void amiga_enable_irq (unsigned int);
extern void amiga_disable_irq (unsigned int);
static void amiga_get_model(char *model);
static int amiga_get_hardware_list(char *buffer);
extern int amiga_get_irq_list (char *);
/* amiga specific timer functions */
static unsigned long amiga_gettimeoffset (void);
static void a3000_gettod (int *, int *, int *, int *, int *, int *);
static void a2000_gettod (int *, int *, int *, int *, int *, int *);
static int amiga_hwclk (int, struct hwclk_time *);
static int amiga_set_clock_mmss (unsigned long);
extern void amiga_mksound( unsigned int count, unsigned int ticks );
#ifdef CONFIG_AMIGA_FLOPPY
extern void amiga_floppy_setup(char *, int *);
#endif
static void amiga_reset (void);
static int amiga_wait_key (struct console *co);
extern void amiga_init_sound(void);
static void amiga_savekmsg_init(void);
static void amiga_mem_console_write(struct console *co, const char *b,
				    unsigned int count);
void amiga_serial_console_write(struct console *co, const char *s,
				unsigned int count);
static void amiga_debug_init(void);
#ifdef CONFIG_HEARTBEAT
static void amiga_heartbeat(int on);
#endif

static struct console amiga_console_driver = {
	name:		"debug",
	wait_key:	amiga_wait_key,
	flags:		CON_PRINTBUFFER,
	index:		-1,
};

#ifdef CONFIG_MAGIC_SYSRQ
static char amiga_sysrq_xlate[128] =
	"\0001234567890-=\\\000\000"					/* 0x00 - 0x0f */
	"qwertyuiop[]\000123"							/* 0x10 - 0x1f */
	"asdfghjkl;'\000\000456"						/* 0x20 - 0x2f */
	"\000zxcvbnm,./\000+789"						/* 0x30 - 0x3f */
	" \177\t\r\r\000\177\000\000\000-\000\000\000\000\000"	/* 0x40 - 0x4f */
	"\000\201\202\203\204\205\206\207\210\211()/*+\000"	/* 0x50 - 0x5f */
	"\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"	/* 0x60 - 0x6f */
	"\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000";	/* 0x70 - 0x7f */
#endif

extern void (*kd_mksound)(unsigned int, unsigned int);


    /*
     *  Motherboard Resources present in all Amiga models
     */

static struct {
    struct resource _ciab, _ciaa, _custom, _kickstart;
} mb_resources = {
    _ciab:	{ "CIA B", 0x00bfd000, 0x00bfdfff },
    _ciaa:	{ "CIA A", 0x00bfe000, 0x00bfefff },
    _custom:	{ "Custom I/O", 0x00dff000, 0x00dfffff },
    _kickstart:	{ "Kickstart ROM", 0x00f80000, 0x00ffffff }
};

static struct resource rtc_resource = {
    NULL, 0x00dc0000, 0x00dcffff
};

static struct resource ram_resource[NUM_MEMINFO];


    /*
     *  Parse an Amiga-specific record in the bootinfo
     */

int amiga_parse_bootinfo(const struct bi_record *record)
{
    int unknown = 0;
    const unsigned long *data = record->data;

    switch (record->tag) {
	case BI_AMIGA_MODEL:
	    amiga_model = *data;
	    break;

	case BI_AMIGA_ECLOCK:
	    amiga_eclock = *data;
	    break;

	case BI_AMIGA_CHIPSET:
	    amiga_chipset = *data;
	    break;

	case BI_AMIGA_CHIP_SIZE:
	    amiga_chip_size = *(const int *)data;
	    break;

	case BI_AMIGA_VBLANK:
	    amiga_vblank = *(const unsigned char *)data;
	    break;

	case BI_AMIGA_PSFREQ:
	    amiga_psfreq = *(const unsigned char *)data;
	    break;

	case BI_AMIGA_AUTOCON:
#ifdef CONFIG_ZORRO
	    if (zorro_num_autocon < ZORRO_NUM_AUTO) {
		const struct ConfigDev *cd = (struct ConfigDev *)data;
		struct zorro_dev *dev = &zorro_autocon[zorro_num_autocon++];
		dev->rom = cd->cd_Rom;
		dev->slotaddr = cd->cd_SlotAddr;
		dev->slotsize = cd->cd_SlotSize;
		dev->resource.start = (unsigned long)cd->cd_BoardAddr;
		dev->resource.end = dev->resource.start+cd->cd_BoardSize-1;
	    } else
		printk("amiga_parse_bootinfo: too many AutoConfig devices\n");
#endif /* CONFIG_ZORRO */
	    break;

	case BI_AMIGA_SERPER:
	    /* serial port period: ignored here */
	    break;

	default:
	    unknown = 1;
    }
    return(unknown);
}

    /*
     *  Identify builtin hardware
     */

static void __init amiga_identify(void)
{
  /* Fill in some default values, if necessary */
  if (amiga_eclock == 0)
    amiga_eclock = 709379;

  memset(&amiga_hw_present, 0, sizeof(amiga_hw_present));

  printk("Amiga hardware found: ");
  if (amiga_model >= AMI_500 && amiga_model <= AMI_DRACO) {
    printk("[%s] ", amiga_models[amiga_model-AMI_500]);
    strcat(amiga_model_name, amiga_models[amiga_model-AMI_500]);
  }

  switch(amiga_model) {
  case AMI_UNKNOWN:
    goto Generic;

  case AMI_600:
  case AMI_1200:
    AMIGAHW_SET(A1200_IDE);
    AMIGAHW_SET(PCMCIA);
  case AMI_500:
  case AMI_500PLUS:
  case AMI_1000:
  case AMI_2000:
  case AMI_2500:
    AMIGAHW_SET(A2000_CLK);	/* Is this correct for all models? */
    goto Generic;

  case AMI_3000:
  case AMI_3000T:
    AMIGAHW_SET(AMBER_FF);
    AMIGAHW_SET(MAGIC_REKICK);
    /* fall through */
  case AMI_3000PLUS:
    AMIGAHW_SET(A3000_SCSI);
    AMIGAHW_SET(A3000_CLK);
    AMIGAHW_SET(ZORRO3);
    goto Generic;

  case AMI_4000T:
    AMIGAHW_SET(A4000_SCSI);
    /* fall through */
  case AMI_4000:
    AMIGAHW_SET(A4000_IDE);
    AMIGAHW_SET(A3000_CLK);
    AMIGAHW_SET(ZORRO3);
    goto Generic;

  case AMI_CDTV:
  case AMI_CD32:
    AMIGAHW_SET(CD_ROM);
    AMIGAHW_SET(A2000_CLK);             /* Is this correct? */
    goto Generic;

  Generic:
    AMIGAHW_SET(AMI_VIDEO);
    AMIGAHW_SET(AMI_BLITTER);
    AMIGAHW_SET(AMI_AUDIO);
    AMIGAHW_SET(AMI_FLOPPY);
    AMIGAHW_SET(AMI_KEYBOARD);
    AMIGAHW_SET(AMI_MOUSE);
    AMIGAHW_SET(AMI_SERIAL);
    AMIGAHW_SET(AMI_PARALLEL);
    AMIGAHW_SET(CHIP_RAM);
    AMIGAHW_SET(PAULA);

    switch(amiga_chipset) {
    case CS_OCS:
    case CS_ECS:
    case CS_AGA:
      switch (custom.deniseid & 0xf) {
      case 0x0c:
	AMIGAHW_SET(DENISE_HR);
	break;
      case 0x08:
	AMIGAHW_SET(LISA);
	break;
      }
      break;
    default:
      AMIGAHW_SET(DENISE);
      break;
    }
    switch ((custom.vposr>>8) & 0x7f) {
    case 0x00:
      AMIGAHW_SET(AGNUS_PAL);
      break;
    case 0x10:
      AMIGAHW_SET(AGNUS_NTSC);
      break;
    case 0x20:
    case 0x21:
      AMIGAHW_SET(AGNUS_HR_PAL);
      break;
    case 0x30:
    case 0x31:
      AMIGAHW_SET(AGNUS_HR_NTSC);
      break;
    case 0x22:
    case 0x23:
      AMIGAHW_SET(ALICE_PAL);
      break;
    case 0x32:
    case 0x33:
      AMIGAHW_SET(ALICE_NTSC);
      break;
    }
    AMIGAHW_SET(ZORRO);
    break;

  case AMI_DRACO:
    panic("No support for Draco yet");
 
  default:
    panic("Unknown Amiga Model");
  }

#define AMIGAHW_ANNOUNCE(name, str)			\
  if (AMIGAHW_PRESENT(name))				\
    printk(str)

  AMIGAHW_ANNOUNCE(AMI_VIDEO, "VIDEO ");
  AMIGAHW_ANNOUNCE(AMI_BLITTER, "BLITTER ");
  AMIGAHW_ANNOUNCE(AMBER_FF, "AMBER_FF ");
  AMIGAHW_ANNOUNCE(AMI_AUDIO, "AUDIO ");
  AMIGAHW_ANNOUNCE(AMI_FLOPPY, "FLOPPY ");
  AMIGAHW_ANNOUNCE(A3000_SCSI, "A3000_SCSI ");
  AMIGAHW_ANNOUNCE(A4000_SCSI, "A4000_SCSI ");
  AMIGAHW_ANNOUNCE(A1200_IDE, "A1200_IDE ");
  AMIGAHW_ANNOUNCE(A4000_IDE, "A4000_IDE ");
  AMIGAHW_ANNOUNCE(CD_ROM, "CD_ROM ");
  AMIGAHW_ANNOUNCE(AMI_KEYBOARD, "KEYBOARD ");
  AMIGAHW_ANNOUNCE(AMI_MOUSE, "MOUSE ");
  AMIGAHW_ANNOUNCE(AMI_SERIAL, "SERIAL ");
  AMIGAHW_ANNOUNCE(AMI_PARALLEL, "PARALLEL ");
  AMIGAHW_ANNOUNCE(A2000_CLK, "A2000_CLK ");
  AMIGAHW_ANNOUNCE(A3000_CLK, "A3000_CLK ");
  AMIGAHW_ANNOUNCE(CHIP_RAM, "CHIP_RAM ");
  AMIGAHW_ANNOUNCE(PAULA, "PAULA ");
  AMIGAHW_ANNOUNCE(DENISE, "DENISE ");
  AMIGAHW_ANNOUNCE(DENISE_HR, "DENISE_HR ");
  AMIGAHW_ANNOUNCE(LISA, "LISA ");
  AMIGAHW_ANNOUNCE(AGNUS_PAL, "AGNUS_PAL ");
  AMIGAHW_ANNOUNCE(AGNUS_NTSC, "AGNUS_NTSC ");
  AMIGAHW_ANNOUNCE(AGNUS_HR_PAL, "AGNUS_HR_PAL ");
  AMIGAHW_ANNOUNCE(AGNUS_HR_NTSC, "AGNUS_HR_NTSC ");
  AMIGAHW_ANNOUNCE(ALICE_PAL, "ALICE_PAL ");
  AMIGAHW_ANNOUNCE(ALICE_NTSC, "ALICE_NTSC ");
  AMIGAHW_ANNOUNCE(MAGIC_REKICK, "MAGIC_REKICK ");
  AMIGAHW_ANNOUNCE(PCMCIA, "PCMCIA ");
  if (AMIGAHW_PRESENT(ZORRO))
    printk("ZORRO%s ", AMIGAHW_PRESENT(ZORRO3) ? "3" : "");
  printk("\n");

#undef AMIGAHW_ANNOUNCE
}

    /*
     *  Setup the Amiga configuration info
     */

void __init config_amiga(void)
{
  int i;

  amiga_debug_init();
  amiga_identify();

  /* Yuk, we don't have PCI memory */
  iomem_resource.name = "Memory";
  for (i = 0; i < 4; i++)
    request_resource(&iomem_resource, &((struct resource *)&mb_resources)[i]);

  mach_sched_init      = amiga_sched_init;
  mach_keyb_init       = amiga_keyb_init;
  mach_kbdrate         = amiga_kbdrate;
  mach_kbd_translate   = amiga_kbd_translate;
  SYSRQ_KEY            = 0xff;
  mach_init_IRQ        = amiga_init_IRQ;
  mach_default_handler = &amiga_default_handler;
  mach_request_irq     = amiga_request_irq;
  mach_free_irq        = amiga_free_irq;
  enable_irq           = amiga_enable_irq;
  disable_irq          = amiga_disable_irq;
  mach_get_model       = amiga_get_model;
  mach_get_hardware_list = amiga_get_hardware_list;
  mach_get_irq_list    = amiga_get_irq_list;
  mach_gettimeoffset   = amiga_gettimeoffset;
  if (AMIGAHW_PRESENT(A3000_CLK)){
    mach_gettod  = a3000_gettod;
    rtc_resource.name = "A3000 RTC";
    request_resource(&iomem_resource, &rtc_resource);
  }
  else{ /* if (AMIGAHW_PRESENT(A2000_CLK)) */
    mach_gettod  = a2000_gettod;
    rtc_resource.name = "A2000 RTC";
    request_resource(&iomem_resource, &rtc_resource);
  }

  mach_max_dma_address = 0xffffffff; /*
				      * default MAX_DMA=0xffffffff
				      * on all machines. If we don't
				      * do so, the SCSI code will not
				      * be able to allocate any mem
				      * for transfers, unless we are
				      * dealing with a Z2 mem only
				      * system.                  /Jes
				      */

  mach_hwclk           = amiga_hwclk;
  mach_set_clock_mmss  = amiga_set_clock_mmss;
#ifdef CONFIG_AMIGA_FLOPPY
  mach_floppy_setup    = amiga_floppy_setup;
#endif
  mach_reset           = amiga_reset;
#ifdef CONFIG_DUMMY_CONSOLE
  conswitchp           = &dummy_con;
#endif
  kd_mksound           = amiga_mksound;
#ifdef CONFIG_MAGIC_SYSRQ
  mach_sysrq_key = 0x5f;	     /* HELP */
  mach_sysrq_shift_state = 0x03; /* SHIFT+ALTGR */
  mach_sysrq_shift_mask = 0xff;  /* all modifiers except CapsLock */
  mach_sysrq_xlate = amiga_sysrq_xlate;
#endif
#ifdef CONFIG_HEARTBEAT
  mach_heartbeat = amiga_heartbeat;
#endif

  /* Fill in the clock values (based on the 700 kHz E-Clock) */
  amiga_masterclock = 40*amiga_eclock;	/* 28 MHz */
  amiga_colorclock = 5*amiga_eclock;	/* 3.5 MHz */

  /* clear all DMA bits */
  custom.dmacon = DMAF_ALL;
  /* ensure that the DMA master bit is set */
  custom.dmacon = DMAF_SETCLR | DMAF_MASTER;

  /* don't use Z2 RAM as system memory on Z3 capable machines */
  if (AMIGAHW_PRESENT(ZORRO3)) {
    int i, j;
    u32 disabled_z2mem = 0;
    for (i = 0; i < m68k_num_memory; i++)
      if (m68k_memory[i].addr < 16*1024*1024) {
	if (i == 0) {
	  /* don't cut off the branch we're sitting on */
	  printk("Warning: kernel runs in Zorro II memory\n");
	  continue;
	}
	disabled_z2mem += m68k_memory[i].size;
	m68k_num_memory--;
	for (j = i; j < m68k_num_memory; j++)
	  m68k_memory[j] = m68k_memory[j+1];
	i--;
      }
    if (disabled_z2mem)
      printk("%dK of Zorro II memory will not be used as system memory\n",
	     disabled_z2mem>>10);
  }

  /* request all RAM */
  for (i = 0; i < m68k_num_memory; i++) {
    ram_resource[i].name =
      (m68k_memory[i].addr >= 0x01000000) ? "32-bit Fast RAM" :
      (m68k_memory[i].addr < 0x00c00000) ? "16-bit Fast RAM" :
      "16-bit Slow RAM";
    ram_resource[i].start = m68k_memory[i].addr;
    ram_resource[i].end = m68k_memory[i].addr+m68k_memory[i].size-1;
    request_resource(&iomem_resource, &ram_resource[i]);
  }

  /* initialize chipram allocator */
  amiga_chip_init ();

  /* debugging using chipram */
  if (!strcmp( m68k_debug_device, "mem" )){
	  if (!AMIGAHW_PRESENT(CHIP_RAM))
		  printk("Warning: no chipram present for debugging\n");
	  else {
		  amiga_savekmsg_init();
		  amiga_console_driver.write = amiga_mem_console_write;
		  register_console(&amiga_console_driver);
	  }
  }

  /* our beloved beeper */
  if (AMIGAHW_PRESENT(AMI_AUDIO))
	  amiga_init_sound();

  /*
   * if it is an A3000, set the magic bit that forces
   * a hard rekick
   */
  if (AMIGAHW_PRESENT(MAGIC_REKICK))
	  *(unsigned char *)ZTWO_VADDR(0xde0002) |= 0x80;
}

static unsigned short jiffy_ticks;

static void __init amiga_sched_init(void (*timer_routine)(int, void *,
							  struct pt_regs *))
{
	static struct resource sched_res = {
	    "timer", 0x00bfd400, 0x00bfd5ff,
	};
	jiffy_ticks = (amiga_eclock+HZ/2)/HZ;

	if (request_resource(&mb_resources._ciab, &sched_res))
	    printk("Cannot allocate ciab.ta{lo,hi}\n");
	ciab.cra &= 0xC0;   /* turn off timer A, continuous mode, from Eclk */
	ciab.talo = jiffy_ticks % 256;
	ciab.tahi = jiffy_ticks / 256;

	/* install interrupt service routine for CIAB Timer A
	 *
	 * Please don't change this to use ciaa, as it interferes with the