Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *  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;

}

#define TICK_SIZE 10000

/* This is always executed with interrupts disabled.  */

static unsigned long amiga_gettimeoffset(void)

{

        unsigned short hi, lo, hi2;

        unsigned long ticks, offset = 0;

        /* read CIA B timer A current value */

        hi  = ciab.tahi;

        lo  = ciab.talo;

        hi2 = ciab.tahi;

        if (hi != hi2) {

                lo = ciab.talo;

                hi = hi2;

        }

        ticks = hi << 8 | lo;

        if (ticks > jiffy_ticks / 2)

                /* check for pending interrupt */

                if (cia_set_irq(&ciab_base, 0) & CIA_ICR_TA)

                        offset = 10000;

        ticks = jiffy_ticks - ticks;

        ticks = (10000 * ticks) / jiffy_ticks;

        return ticks + offset;

}

static int a3000_hwclk(int op, struct rtc_time *t)

{

        tod_3000.cntrl1 = TOD3000_CNTRL1_HOLD;

        if (!op) { /* read */

                t->tm_sec  = tod_3000.second1 * 10 + tod_3000.second2;

                t->tm_min  = tod_3000.minute1 * 10 + tod_3000.minute2;

                t->tm_hour = tod_3000.hour1   * 10 + tod_3000.hour2;

                t->tm_mday = tod_3000.day1    * 10 + tod_3000.day2;

                t->tm_wday = tod_3000.weekday;

                t->tm_mon  = tod_3000.month1  * 10 + tod_3000.month2 - 1;

                t->tm_year = tod_3000.year1   * 10 + tod_3000.year2;

                if (t->tm_year <= 69)

                        t->tm_year += 100;

        } else {

                tod_3000.second1 = t->tm_sec / 10;

                tod_3000.second2 = t->tm_sec % 10;

                tod_3000.minute1 = t->tm_min / 10;

                tod_3000.minute2 = t->tm_min % 10;

                tod_3000.hour1   = t->tm_hour / 10;

                tod_3000.hour2   = t->tm_hour % 10;

                tod_3000.day1    = t->tm_mday / 10;

                tod_3000.day2    = t->tm_mday % 10;

                if (t->tm_wday != -1)

                        tod_3000.weekday = t->tm_wday;

                tod_3000.month1  = (t->tm_mon + 1) / 10;

                tod_3000.month2  = (t->tm_mon + 1) % 10;

                if (t->tm_year >= 100)

                        t->tm_year -= 100;

                tod_3000.year1   = t->tm_year / 10;

                tod_3000.year2   = t->tm_year % 10;

        }

        tod_3000.cntrl1 = TOD3000_CNTRL1_FREE;

        return 0;

}

static int a2000_hwclk(int op, struct rtc_time *t)

{

        int cnt = 5;

        tod_2000.cntrl1 = TOD2000_CNTRL1_HOLD;

        while ((tod_2000.cntrl1 & TOD2000_CNTRL1_BUSY) && cnt--) {

                tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;

                udelay(70);

                tod_2000.cntrl1 |= TOD2000_CNTRL1_HOLD;

        }

        if (!cnt)

                printk(KERN_INFO "hwclk: timed out waiting for RTC (0x%x)\n",

                        tod_2000.cntrl1);

        if (!op) { /* read */

                t->tm_sec  = tod_2000.second1     * 10 + tod_2000.second2;

                t->tm_min  = tod_2000.minute1     * 10 + tod_2000.minute2;

                t->tm_hour = (tod_2000.hour1 & 3) * 10 + tod_2000.hour2;

                t->tm_mday = tod_2000.day1        * 10 + tod_2000.day2;

                t->tm_wday = tod_2000.weekday;

                t->tm_mon  = tod_2000.month1      * 10 + tod_2000.month2 - 1;

                t->tm_year = tod_2000.year1       * 10 + tod_2000.year2;

                if (t->tm_year <= 69)

                        t->tm_year += 100;

                if (!(tod_2000.cntrl3 & TOD2000_CNTRL3_24HMODE)) {

                        if (!(tod_2000.hour1 & TOD2000_HOUR1_PM) && t->tm_hour == 12)

                                t->tm_hour = 0;

                        else if ((tod_2000.hour1 & TOD2000_HOUR1_PM) && t->tm_hour != 12)

                                t->tm_hour += 12;

                }

        } else {

                tod_2000.second1 = t->tm_sec / 10;

                tod_2000.second2 = t->tm_sec % 10;

                tod_2000.minute1 = t->tm_min / 10;

                tod_2000.minute2 = t->tm_min % 10;

                if (tod_2000.cntrl3 & TOD2000_CNTRL3_24HMODE)

                        tod_2000.hour1 = t->tm_hour / 10;

                else if (t->tm_hour >= 12)

                        tod_2000.hour1 = TOD2000_HOUR1_PM +

                                (t->tm_hour - 12) / 10;

                else

                        tod_2000.hour1 = t->tm_hour / 10;

                tod_2000.hour2   = t->tm_hour % 10;

                tod_2000.day1    = t->tm_mday / 10;

                tod_2000.day2    = t->tm_mday % 10;

                if (t->tm_wday != -1)

                        tod_2000.weekday = t->tm_wday;

                tod_2000.month1  = (t->tm_mon + 1) / 10;

                tod_2000.month2  = (t->tm_mon + 1) % 10;

                if (t->tm_year >= 100)

                        t->tm_year -= 100;

                tod_2000.year1   = t->tm_year / 10;

                tod_2000.year2   = t->tm_year % 10;

        }

        tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;

        return 0;

}

static int amiga_set_clock_mmss(unsigned long nowtime)

{

        short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;

        if (AMIGAHW_PRESENT(A3000_CLK)) {

                tod_3000.cntrl1 = TOD3000_CNTRL1_HOLD;

                tod_3000.second1 = real_seconds / 10;

                tod_3000.second2 = real_seconds % 10;

                tod_3000.minute1 = real_minutes / 10;