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/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/rtc.h>
#include <linux/init.h>
#include <linux/vt_kern.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/zorro.h>

#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/rtc.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 char s_a500[] __initdata = "A500";
static char s_a500p[] __initdata = "A500+";
static char s_a600[] __initdata = "A600";
static char s_a1000[] __initdata = "A1000";
static char s_a1200[] __initdata = "A1200";
static char s_a2000[] __initdata = "A2000";
static char s_a2500[] __initdata = "A2500";
static char s_a3000[] __initdata = "A3000";
static char s_a3000t[] __initdata = "A3000T";
static char s_a3000p[] __initdata = "A3000+";
static char s_a4000[] __initdata = "A4000";
static char s_a4000t[] __initdata = "A4000T";
static char s_cdtv[] __initdata = "CDTV";
static char s_cd32[] __initdata = "CD32";
static char s_draco[] __initdata = "Draco";
static char *amiga_models[] __initdata = {
	[AMI_500-AMI_500]	= s_a500,
	[AMI_500PLUS-AMI_500]	= s_a500p,
	[AMI_600-AMI_500]	= s_a600,
	[AMI_1000-AMI_500]	= s_a1000,
	[AMI_1200-AMI_500]	= s_a1200,
	[AMI_2000-AMI_500]	= s_a2000,
	[AMI_2500-AMI_500]	= s_a2500,
	[AMI_3000-AMI_500]	= s_a3000,
	[AMI_3000T-AMI_500]	= s_a3000t,
	[AMI_3000PLUS-AMI_500]	= s_a3000p,
	[AMI_4000-AMI_500]	= s_a4000,
	[AMI_4000T-AMI_500]	= s_a4000t,
	[AMI_CDTV-AMI_500]	= s_cdtv,
	[AMI_CD32-AMI_500]	= s_cd32,
	[AMI_DRACO-AMI_500]	= s_draco,
};

static char amiga_model_name[13] = "Amiga ";

static void amiga_sched_init(irq_handler_t handler);
/* amiga specific irq functions */
extern void amiga_init_IRQ(void);
static void amiga_get_model(char *model);
static int amiga_get_hardware_list(char *buffer);
/* amiga specific timer functions */
static unsigned long amiga_gettimeoffset(void);
static int a3000_hwclk(int, struct rtc_time *);
static int a2000_hwclk(int, struct rtc_time *);
static int amiga_set_clock_mmss(unsigned long);
static unsigned int amiga_get_ss(void);
extern void amiga_mksound(unsigned int count, unsigned int ticks);
static void amiga_reset(void);
extern void amiga_init_sound(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);
#ifdef CONFIG_HEARTBEAT
static void amiga_heartbeat(int on);
#endif

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


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

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

static struct resource rtc_resource = {
	.start = 0x00dc0000, .end = 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 (amiga_custom.deniseid & 0xf) {
			case 0x0c:
				AMIGAHW_SET(DENISE_HR);
				break;
			case 0x08:
				AMIGAHW_SET(LISA);
				break;
			}
			break;
		default:
			AMIGAHW_SET(DENISE);
			break;
		}
		switch ((amiga_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_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_init_IRQ        = amiga_init_IRQ;
	mach_get_model       = amiga_get_model;
	mach_get_hardware_list = amiga_get_hardware_list;
	mach_gettimeoffset   = amiga_gettimeoffset;
	if (AMIGAHW_PRESENT(A3000_CLK)) {
		mach_hwclk         = a3000_hwclk;
		rtc_resource.name = "A3000 RTC";
		request_resource(&iomem_resource, &rtc_resource);
	} else /* if (AMIGAHW_PRESENT(A2000_CLK)) */ {
		mach_hwclk         = a2000_hwclk;
		rtc_resource.name = "A2000 RTC";
		request_resource(&iomem_resource, &rtc_resource);
	}

	/*
	 * 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_max_dma_address = 0xffffffff;

	mach_set_clock_mmss  = amiga_set_clock_mmss;
	mach_get_ss          = amiga_get_ss;
	mach_reset           = amiga_reset;
#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
	mach_beep            = amiga_mksound;
#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 */
	amiga_custom.dmacon = DMAF_ALL;
	/* ensure that the DMA master bit is set */
	amiga_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();

	/* 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(irq_handler_t timer_routine)
{
	static struct resource sched_res = {
		.name = "timer", .start = 0x00bfd400, .end = 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
	 * SCSI code. We'll have to take a look at this later
	 */
	request_irq(IRQ_AMIGA_CIAB_TA, timer_routine, 0, "timer", NULL);
	/* start timer */
	ciab.cra |= 0x11;
}