spitz.c.svn-base

我们自己开发的一个OSEK操作系统！不知道可不可以？

/*
 * PXA270-based Clamshell PDA platforms.
 *
 * Copyright (c) 2006 Openedhand Ltd.
 * Written by Andrzej Zaborowski <[e-mail]>
 *
 * This code is licensed under the GNU GPL v2.
 */

#include "hw.h"
#include "pxa.h"
#include "arm-misc.h"
#include "sysemu.h"
#include "pcmcia.h"
#include "i2c.h"
#include "flash.h"
#include "qemu-timer.h"
#include "devices.h"
#include "console.h"
#include "block.h"
#include "audio/audio.h"
#include "boards.h"

#define spitz_printf(format, ...)	\
    fprintf(stderr, "%s: " format, __FUNCTION__, ##__VA_ARGS__)
#undef REG_FMT
#if TARGET_PHYS_ADDR_BITS == 32
#define REG_FMT			"0x%02x"
#else
#define REG_FMT			"0x%02lx"
#endif

/* Spitz Flash */
#define FLASH_BASE		0x0c000000
#define FLASH_ECCLPLB		0x00	/* Line parity 7 - 0 bit */
#define FLASH_ECCLPUB		0x04	/* Line parity 15 - 8 bit */
#define FLASH_ECCCP		0x08	/* Column parity 5 - 0 bit */
#define FLASH_ECCCNTR		0x0c	/* ECC byte counter */
#define FLASH_ECCCLRR		0x10	/* Clear ECC */
#define FLASH_FLASHIO		0x14	/* Flash I/O */
#define FLASH_FLASHCTL		0x18	/* Flash Control */

#define FLASHCTL_CE0		(1 << 0)
#define FLASHCTL_CLE		(1 << 1)
#define FLASHCTL_ALE		(1 << 2)
#define FLASHCTL_WP		(1 << 3)
#define FLASHCTL_CE1		(1 << 4)
#define FLASHCTL_RYBY		(1 << 5)
#define FLASHCTL_NCE		(FLASHCTL_CE0 | FLASHCTL_CE1)

struct sl_nand_s {
    target_phys_addr_t target_base;
    struct nand_flash_s *nand;
    uint8_t ctl;
    struct ecc_state_s ecc;
};

static uint32_t sl_readb(void *opaque, target_phys_addr_t addr)
{
    struct sl_nand_s *s = (struct sl_nand_s *) opaque;
    int ryby;
    addr -= s->target_base;

    switch (addr) {
#define BSHR(byte, from, to)	((s->ecc.lp[byte] >> (from - to)) & (1 << to))
    case FLASH_ECCLPLB:
        return BSHR(0, 4, 0) | BSHR(0, 5, 2) | BSHR(0, 6, 4) | BSHR(0, 7, 6) |
                BSHR(1, 4, 1) | BSHR(1, 5, 3) | BSHR(1, 6, 5) | BSHR(1, 7, 7);

#define BSHL(byte, from, to)	((s->ecc.lp[byte] << (to - from)) & (1 << to))
    case FLASH_ECCLPUB:
        return BSHL(0, 0, 0) | BSHL(0, 1, 2) | BSHL(0, 2, 4) | BSHL(0, 3, 6) |
                BSHL(1, 0, 1) | BSHL(1, 1, 3) | BSHL(1, 2, 5) | BSHL(1, 3, 7);

    case FLASH_ECCCP:
        return s->ecc.cp;

    case FLASH_ECCCNTR:
        return s->ecc.count & 0xff;

    case FLASH_FLASHCTL:
        nand_getpins(s->nand, &ryby);
        if (ryby)
            return s->ctl | FLASHCTL_RYBY;
        else
            return s->ctl;

    case FLASH_FLASHIO:
        return ecc_digest(&s->ecc, nand_getio(s->nand));

    default:
        spitz_printf("Bad register offset " REG_FMT "\n", addr);
    }
    return 0;
}

static uint32_t sl_readl(void *opaque, target_phys_addr_t addr)
{
    struct sl_nand_s *s = (struct sl_nand_s *) opaque;
    addr -= s->target_base;

    if (addr == FLASH_FLASHIO)
        return ecc_digest(&s->ecc, nand_getio(s->nand)) |
                (ecc_digest(&s->ecc, nand_getio(s->nand)) << 16);

    return sl_readb(opaque, addr);
}

static void sl_writeb(void *opaque, target_phys_addr_t addr,
                uint32_t value)
{
    struct sl_nand_s *s = (struct sl_nand_s *) opaque;
    addr -= s->target_base;

    switch (addr) {
    case FLASH_ECCCLRR:
        /* Value is ignored.  */
        ecc_reset(&s->ecc);
        break;

    case FLASH_FLASHCTL:
        s->ctl = value & 0xff & ~FLASHCTL_RYBY;
        nand_setpins(s->nand,
                        s->ctl & FLASHCTL_CLE,
                        s->ctl & FLASHCTL_ALE,
                        s->ctl & FLASHCTL_NCE,
                        s->ctl & FLASHCTL_WP,
                        0);
        break;

    case FLASH_FLASHIO:
        nand_setio(s->nand, ecc_digest(&s->ecc, value & 0xff));
        break;

    default:
        spitz_printf("Bad register offset " REG_FMT "\n", addr);
    }
}

static void sl_save(QEMUFile *f, void *opaque)
{
    struct sl_nand_s *s = (struct sl_nand_s *) opaque;

    qemu_put_8s(f, &s->ctl);
    ecc_put(f, &s->ecc);
}

static int sl_load(QEMUFile *f, void *opaque, int version_id)
{
    struct sl_nand_s *s = (struct sl_nand_s *) opaque;

    qemu_get_8s(f, &s->ctl);
    ecc_get(f, &s->ecc);

    return 0;
}

enum {
    FLASH_128M,
    FLASH_1024M,
};

static void sl_flash_register(struct pxa2xx_state_s *cpu, int size)
{
    int iomemtype;
    struct sl_nand_s *s;
    CPUReadMemoryFunc *sl_readfn[] = {
        sl_readb,
        sl_readb,
        sl_readl,
    };
    CPUWriteMemoryFunc *sl_writefn[] = {
        sl_writeb,
        sl_writeb,
        sl_writeb,
    };

    s = (struct sl_nand_s *) qemu_mallocz(sizeof(struct sl_nand_s));
    s->target_base = FLASH_BASE;
    s->ctl = 0;
    if (size == FLASH_128M)
        s->nand = nand_init(NAND_MFR_SAMSUNG, 0x73);
    else if (size == FLASH_1024M)
        s->nand = nand_init(NAND_MFR_SAMSUNG, 0xf1);

    iomemtype = cpu_register_io_memory(0, sl_readfn,
                    sl_writefn, s);
    cpu_register_physical_memory(s->target_base, 0x40, iomemtype);

    register_savevm("sl_flash", 0, 0, sl_save, sl_load, s);
}

/* Spitz Keyboard */

#define SPITZ_KEY_STROBE_NUM	11
#define SPITZ_KEY_SENSE_NUM	7

static const int spitz_gpio_key_sense[SPITZ_KEY_SENSE_NUM] = {
    12, 17, 91, 34, 36, 38, 39
};

static const int spitz_gpio_key_strobe[SPITZ_KEY_STROBE_NUM] = {
    88, 23, 24, 25, 26, 27, 52, 103, 107, 108, 114
};

/* Eighth additional row maps the special keys */
static int spitz_keymap[SPITZ_KEY_SENSE_NUM + 1][SPITZ_KEY_STROBE_NUM] = {
    { 0x1d, 0x02, 0x04, 0x06, 0x07, 0x08, 0x0a, 0x0b, 0x0e, 0x3f, 0x40 },
    {  -1 , 0x03, 0x05, 0x13, 0x15, 0x09, 0x17, 0x18, 0x19, 0x41, 0x42 },
    { 0x0f, 0x10, 0x12, 0x14, 0x22, 0x16, 0x24, 0x25,  -1 ,  -1 ,  -1  },
    { 0x3c, 0x11, 0x1f, 0x21, 0x2f, 0x23, 0x32, 0x26,  -1 , 0x36,  -1  },
    { 0x3b, 0x1e, 0x20, 0x2e, 0x30, 0x31, 0x34,  -1 , 0x1c, 0x2a,  -1  },
    { 0x44, 0x2c, 0x2d, 0x0c, 0x39, 0x33,  -1 , 0x48,  -1 ,  -1 , 0x38 },
    { 0x37, 0x3d,  -1 , 0x45, 0x57, 0x58, 0x4b, 0x50, 0x4d,  -1 ,  -1  },
    { 0x52, 0x43, 0x01, 0x47, 0x49,  -1 ,  -1 ,  -1 ,  -1 ,  -1 ,  -1  },
};

#define SPITZ_GPIO_AK_INT	13	/* Remote control */
#define SPITZ_GPIO_SYNC		16	/* Sync button */
#define SPITZ_GPIO_ON_KEY	95	/* Power button */
#define SPITZ_GPIO_SWA		97	/* Lid */
#define SPITZ_GPIO_SWB		96	/* Tablet mode */

/* The special buttons are mapped to unused keys */
static const int spitz_gpiomap[5] = {
    SPITZ_GPIO_AK_INT, SPITZ_GPIO_SYNC, SPITZ_GPIO_ON_KEY,
    SPITZ_GPIO_SWA, SPITZ_GPIO_SWB,
};
static int spitz_gpio_invert[5] = { 0, 0, 0, 0, 0, };

struct spitz_keyboard_s {
    qemu_irq sense[SPITZ_KEY_SENSE_NUM];
    qemu_irq *strobe;
    qemu_irq gpiomap[5];
    int keymap[0x80];
    uint16_t keyrow[SPITZ_KEY_SENSE_NUM];
    uint16_t strobe_state;
    uint16_t sense_state;

    uint16_t pre_map[0x100];
    uint16_t modifiers;
    uint16_t imodifiers;
    uint8_t fifo[16];
    int fifopos, fifolen;
    QEMUTimer *kbdtimer;
};

static void spitz_keyboard_sense_update(struct spitz_keyboard_s *s)
{
    int i;
    uint16_t strobe, sense = 0;
    for (i = 0; i < SPITZ_KEY_SENSE_NUM; i ++) {
        strobe = s->keyrow[i] & s->strobe_state;
        if (strobe) {
            sense |= 1 << i;
            if (!(s->sense_state & (1 << i)))
                qemu_irq_raise(s->sense[i]);
        } else if (s->sense_state & (1 << i))
            qemu_irq_lower(s->sense[i]);
    }

    s->sense_state = sense;
}

static void spitz_keyboard_strobe(void *opaque, int line, int level)
{
    struct spitz_keyboard_s *s = (struct spitz_keyboard_s *) opaque;

    if (level)
        s->strobe_state |= 1 << line;
    else
        s->strobe_state &= ~(1 << line);
    spitz_keyboard_sense_update(s);
}

static void spitz_keyboard_keydown(struct spitz_keyboard_s *s, int keycode)
{
    int spitz_keycode = s->keymap[keycode & 0x7f];
    if (spitz_keycode == -1)
        return;

    /* Handle the additional keys */
    if ((spitz_keycode >> 4) == SPITZ_KEY_SENSE_NUM) {
        qemu_set_irq(s->gpiomap[spitz_keycode & 0xf], (keycode < 0x80) ^
                        spitz_gpio_invert[spitz_keycode & 0xf]);
        return;
    }

    if (keycode & 0x80)
        s->keyrow[spitz_keycode >> 4] &= ~(1 << (spitz_keycode & 0xf));
    else
        s->keyrow[spitz_keycode >> 4] |= 1 << (spitz_keycode & 0xf);

    spitz_keyboard_sense_update(s);
}

#define SHIFT	(1 << 7)
#define CTRL	(1 << 8)
#define FN	(1 << 9)

#define QUEUE_KEY(c)	s->fifo[(s->fifopos + s->fifolen ++) & 0xf] = c

static void spitz_keyboard_handler(struct spitz_keyboard_s *s, int keycode)
{
    uint16_t code;
    int mapcode;
    switch (keycode) {
    case 0x2a:	/* Left Shift */
        s->modifiers |= 1;
        break;
    case 0xaa:
        s->modifiers &= ~1;
        break;
    case 0x36:	/* Right Shift */
        s->modifiers |= 2;
        break;
    case 0xb6:
        s->modifiers &= ~2;
        break;
    case 0x1d:	/* Control */
        s->modifiers |= 4;
        break;
    case 0x9d:
        s->modifiers &= ~4;
        break;
    case 0x38:	/* Alt */
        s->modifiers |= 8;
        break;
    case 0xb8:
        s->modifiers &= ~8;
        break;
    }

    code = s->pre_map[mapcode = ((s->modifiers & 3) ?
            (keycode | SHIFT) :
            (keycode & ~SHIFT))];

    if (code != mapcode) {
#if 0
        if ((code & SHIFT) && !(s->modifiers & 1))
            QUEUE_KEY(0x2a | (keycode & 0x80));
        if ((code & CTRL ) && !(s->modifiers & 4))
            QUEUE_KEY(0x1d | (keycode & 0x80));
        if ((code & FN   ) && !(s->modifiers & 8))
            QUEUE_KEY(0x38 | (keycode & 0x80));
        if ((code & FN   ) && (s->modifiers & 1))
            QUEUE_KEY(0x2a | (~keycode & 0x80));
        if ((code & FN   ) && (s->modifiers & 2))
            QUEUE_KEY(0x36 | (~keycode & 0x80));
#else
        if (keycode & 0x80) {
            if ((s->imodifiers & 1   ) && !(s->modifiers & 1))
                QUEUE_KEY(0x2a | 0x80);
            if ((s->imodifiers & 4   ) && !(s->modifiers & 4))
                QUEUE_KEY(0x1d | 0x80);
            if ((s->imodifiers & 8   ) && !(s->modifiers & 8))
                QUEUE_KEY(0x38 | 0x80);
            if ((s->imodifiers & 0x10) && (s->modifiers & 1))
                QUEUE_KEY(0x2a);
            if ((s->imodifiers & 0x20) && (s->modifiers & 2))
                QUEUE_KEY(0x36);
            s->imodifiers = 0;
        } else {
            if ((code & SHIFT) && !((s->modifiers | s->imodifiers) & 1)) {
                QUEUE_KEY(0x2a);
                s->imodifiers |= 1;
            }
            if ((code & CTRL ) && !((s->modifiers | s->imodifiers) & 4)) {
                QUEUE_KEY(0x1d);
                s->imodifiers |= 4;
            }
            if ((code & FN   ) && !((s->modifiers | s->imodifiers) & 8)) {
                QUEUE_KEY(0x38);
                s->imodifiers |= 8;
            }
            if ((code & FN   ) && (s->modifiers & 1) &&
                            !(s->imodifiers & 0x10)) {
                QUEUE_KEY(0x2a | 0x80);
                s->imodifiers |= 0x10;
            }
            if ((code & FN   ) && (s->modifiers & 2) &&
                            !(s->imodifiers & 0x20)) {
                QUEUE_KEY(0x36 | 0x80);
                s->imodifiers |= 0x20;
            }
        }
#endif
    }

    QUEUE_KEY((code & 0x7f) | (keycode & 0x80));
}

static void spitz_keyboard_tick(void *opaque)
{
    struct spitz_keyboard_s *s = (struct spitz_keyboard_s *) opaque;

    if (s->fifolen) {
        spitz_keyboard_keydown(s, s->fifo[s->fifopos ++]);
        s->fifolen --;
        if (s->fifopos >= 16)
            s->fifopos = 0;
    }

    qemu_mod_timer(s->kbdtimer, qemu_get_clock(vm_clock) + ticks_per_sec / 32);
}

static void spitz_keyboard_pre_map(struct spitz_keyboard_s *s)
{
    int i;
    for (i = 0; i < 0x100; i ++)
        s->pre_map[i] = i;
    s->pre_map[0x02 | SHIFT	] = 0x02 | SHIFT;	/* exclam */
    s->pre_map[0x28 | SHIFT	] = 0x03 | SHIFT;	/* quotedbl */
    s->pre_map[0x04 | SHIFT	] = 0x04 | SHIFT;	/* numbersign */
    s->pre_map[0x05 | SHIFT	] = 0x05 | SHIFT;	/* dollar */
    s->pre_map[0x06 | SHIFT	] = 0x06 | SHIFT;	/* percent */
    s->pre_map[0x08 | SHIFT	] = 0x07 | SHIFT;	/* ampersand */
    s->pre_map[0x28		] = 0x08 | SHIFT;	/* apostrophe */
    s->pre_map[0x0a | SHIFT	] = 0x09 | SHIFT;	/* parenleft */
    s->pre_map[0x0b | SHIFT	] = 0x0a | SHIFT;	/* parenright */
    s->pre_map[0x29 | SHIFT	] = 0x0b | SHIFT;	/* asciitilde */
    s->pre_map[0x03 | SHIFT	] = 0x0c | SHIFT;	/* at */
    s->pre_map[0xd3		] = 0x0e | FN;		/* Delete */
    s->pre_map[0x3a		] = 0x0f | FN;		/* Caps_Lock */
    s->pre_map[0x07 | SHIFT	] = 0x11 | FN;		/* asciicircum */
    s->pre_map[0x0d		] = 0x12 | FN;		/* equal */
    s->pre_map[0x0d | SHIFT	] = 0x13 | FN;		/* plus */
    s->pre_map[0x1a		] = 0x14 | FN;		/* bracketleft */
    s->pre_map[0x1b		] = 0x15 | FN;		/* bracketright */
    s->pre_map[0x1a | SHIFT	] = 0x16 | FN;		/* braceleft */
    s->pre_map[0x1b | SHIFT	] = 0x17 | FN;		/* braceright */
    s->pre_map[0x27		] = 0x22 | FN;		/* semicolon */
    s->pre_map[0x27 | SHIFT	] = 0x23 | FN;		/* colon */