[qemu.git] / hw / pxa2xx_gpio.c

/*
 * Intel XScale PXA255/270 GPIO controller emulation.
 *
 * Copyright (c) 2006 Openedhand Ltd.
 * Written by Andrzej Zaborowski <balrog@zabor.org>
 *
 * This code is licensed under the GPL.
 */

#include "vl.h"

#define PXA2XX_GPIO_BANKS	4

struct pxa2xx_gpio_info_s {
    target_phys_addr_t base;
    qemu_irq *pic;
    int lines;
    CPUState *cpu_env;

    /* XXX: GNU C vectors are more suitable */
    uint32_t ilevel[PXA2XX_GPIO_BANKS];
    uint32_t olevel[PXA2XX_GPIO_BANKS];
    uint32_t dir[PXA2XX_GPIO_BANKS];
    uint32_t rising[PXA2XX_GPIO_BANKS];
    uint32_t falling[PXA2XX_GPIO_BANKS];
    uint32_t status[PXA2XX_GPIO_BANKS];
    uint32_t gpsr[PXA2XX_GPIO_BANKS];
    uint32_t gafr[PXA2XX_GPIO_BANKS * 2];

    uint32_t prev_level[PXA2XX_GPIO_BANKS];
    struct {
        gpio_handler_t fn;
        void *opaque;
    } handler[PXA2XX_GPIO_BANKS * 32];

    void (*read_notify)(void *opaque);
    void *opaque;
};

static struct {
    enum {
        GPIO_NONE,
        GPLR,
        GPSR,
        GPCR,
        GPDR,
        GRER,
        GFER,
        GEDR,
        GAFR_L,
        GAFR_U,
    } reg;
    int bank;
} pxa2xx_gpio_regs[0x200] = {
    [0 ... 0x1ff] = { GPIO_NONE, 0 },
#define PXA2XX_REG(reg, a0, a1, a2, a3)	\
    [a0] = { reg, 0 }, [a1] = { reg, 1 }, [a2] = { reg, 2 }, [a3] = { reg, 3 },

    PXA2XX_REG(GPLR, 0x000, 0x004, 0x008, 0x100)
    PXA2XX_REG(GPSR, 0x018, 0x01c, 0x020, 0x118)
    PXA2XX_REG(GPCR, 0x024, 0x028, 0x02c, 0x124)
    PXA2XX_REG(GPDR, 0x00c, 0x010, 0x014, 0x10c)
    PXA2XX_REG(GRER, 0x030, 0x034, 0x038, 0x130)
    PXA2XX_REG(GFER, 0x03c, 0x040, 0x044, 0x13c)
    PXA2XX_REG(GEDR, 0x048, 0x04c, 0x050, 0x148)
    PXA2XX_REG(GAFR_L, 0x054, 0x05c, 0x064, 0x06c)
    PXA2XX_REG(GAFR_U, 0x058, 0x060, 0x068, 0x070)
};

static void pxa2xx_gpio_irq_update(struct pxa2xx_gpio_info_s *s)
{
    if (s->status[0] & (1 << 0))
        qemu_irq_raise(s->pic[PXA2XX_PIC_GPIO_0]);
    else
        qemu_irq_lower(s->pic[PXA2XX_PIC_GPIO_0]);

    if (s->status[0] & (1 << 1))
        qemu_irq_raise(s->pic[PXA2XX_PIC_GPIO_1]);
    else
        qemu_irq_lower(s->pic[PXA2XX_PIC_GPIO_1]);

    if ((s->status[0] & ~3) | s->status[1] | s->status[2] | s->status[3])
        qemu_irq_raise(s->pic[PXA2XX_PIC_GPIO_X]);
    else
        qemu_irq_lower(s->pic[PXA2XX_PIC_GPIO_X]);
}

/* Bitmap of pins used as standby and sleep wake-up sources.  */
const int pxa2xx_gpio_wake[PXA2XX_GPIO_BANKS] = {
    0x8003fe1b, 0x002001fc, 0xec080000, 0x0012007f,
};

void pxa2xx_gpio_set(struct pxa2xx_gpio_info_s *s, int line, int level)
{
    int bank;
    uint32_t mask;

    if (line >= s->lines) {
        printf("%s: No GPIO pin %i\n", __FUNCTION__, line);
        return;
    }

    bank = line >> 5;
    mask = 1 << (line & 31);

    if (level) {
        s->status[bank] |= s->rising[bank] & mask &
                ~s->ilevel[bank] & ~s->dir[bank];
        s->ilevel[bank] |= mask;
    } else {
        s->status[bank] |= s->falling[bank] & mask &
                s->ilevel[bank] & ~s->dir[bank];
        s->ilevel[bank] &= ~mask;
    }

    if (s->status[bank] & mask)
        pxa2xx_gpio_irq_update(s);

    /* Wake-up GPIOs */
    if (s->cpu_env->halted && (mask & ~s->dir[bank] & pxa2xx_gpio_wake[bank]))
        cpu_interrupt(s->cpu_env, CPU_INTERRUPT_EXITTB);
}

static void pxa2xx_gpio_handler_update(struct pxa2xx_gpio_info_s *s) {
    uint32_t level, diff;
    int i, bit, line;
    for (i = 0; i < PXA2XX_GPIO_BANKS; i ++) {
        level = s->olevel[i] & s->dir[i];

        for (diff = s->prev_level[i] ^ level; diff; diff ^= 1 << bit) {
            bit = ffs(diff) - 1;
            line = bit + 32 * i;
            if (s->handler[line].fn)
                s->handler[line].fn(line, (level >> bit) & 1,
                                s->handler[line].opaque);
        }

        s->prev_level[i] = level;
    }
}

static uint32_t pxa2xx_gpio_read(void *opaque, target_phys_addr_t offset)
{
    struct pxa2xx_gpio_info_s *s = (struct pxa2xx_gpio_info_s *) opaque;
    uint32_t ret;
    int bank;
    offset -= s->base;
    if (offset >= 0x200)
        return 0;

    bank = pxa2xx_gpio_regs[offset].bank;
    switch (pxa2xx_gpio_regs[offset].reg) {
    case GPDR:		/* GPIO Pin-Direction registers */
        return s->dir[bank];

    case GPSR:		/* GPIO Pin-Output Set registers */
        printf("%s: Read from a write-only register " REG_FMT "\n",
                        __FUNCTION__, offset);
        return s->gpsr[bank];	/* Return last written value.  */

    case GRER:		/* GPIO Rising-Edge Detect Enable registers */
        return s->rising[bank];

    case GFER:		/* GPIO Falling-Edge Detect Enable registers */
        return s->falling[bank];

    case GAFR_L:	/* GPIO Alternate Function registers */
        return s->gafr[bank * 2];

    case GAFR_U:	/* GPIO Alternate Function registers */
        return s->gafr[bank * 2 + 1];

    case GPLR:		/* GPIO Pin-Level registers */
        ret = (s->olevel[bank] & s->dir[bank]) |
                (s->ilevel[bank] & ~s->dir[bank]);
        if (s->read_notify)
            s->read_notify(s->opaque);
        return ret;

    case GEDR:		/* GPIO Edge Detect Status registers */
        return s->status[bank];

    default:
        cpu_abort(cpu_single_env,
                "%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
    }

    return 0;
}

static void pxa2xx_gpio_write(void *opaque,
                target_phys_addr_t offset, uint32_t value)
{
    struct pxa2xx_gpio_info_s *s = (struct pxa2xx_gpio_info_s *) opaque;
    int bank;
    offset -= s->base;
    if (offset >= 0x200)
        return;

    bank = pxa2xx_gpio_regs[offset].bank;
    switch (pxa2xx_gpio_regs[offset].reg) {
    case GPDR:		/* GPIO Pin-Direction registers */
        s->dir[bank] = value;
        pxa2xx_gpio_handler_update(s);
        break;

    case GPSR:		/* GPIO Pin-Output Set registers */
        s->olevel[bank] |= value;
        pxa2xx_gpio_handler_update(s);
        s->gpsr[bank] = value;
        break;

    case GPCR:		/* GPIO Pin-Output Clear registers */
        s->olevel[bank] &= ~value;
        pxa2xx_gpio_handler_update(s);
        break;

    case GRER:		/* GPIO Rising-Edge Detect Enable registers */
        s->rising[bank] = value;
        break;

    case GFER:		/* GPIO Falling-Edge Detect Enable registers */
        s->falling[bank] = value;
        break;

    case GAFR_L:	/* GPIO Alternate Function registers */
        s->gafr[bank * 2] = value;
        break;

    case GAFR_U:	/* GPIO Alternate Function registers */
        s->gafr[bank * 2 + 1] = value;
        break;

    case GEDR:		/* GPIO Edge Detect Status registers */
        s->status[bank] &= ~value;
        pxa2xx_gpio_irq_update(s);
        break;

    default:
        cpu_abort(cpu_single_env,
                "%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
    }
}

static CPUReadMemoryFunc *pxa2xx_gpio_readfn[] = {
    pxa2xx_gpio_read,
    pxa2xx_gpio_read,
    pxa2xx_gpio_read
};

static CPUWriteMemoryFunc *pxa2xx_gpio_writefn[] = {
    pxa2xx_gpio_write,
    pxa2xx_gpio_write,
    pxa2xx_gpio_write
};

static void pxa2xx_gpio_save(QEMUFile *f, void *opaque)
{
    struct pxa2xx_gpio_info_s *s = (struct pxa2xx_gpio_info_s *) opaque;
    int i;

    qemu_put_be32(f, s->lines);

    for (i = 0; i < PXA2XX_GPIO_BANKS; i ++) {
        qemu_put_be32s(f, &s->ilevel[i]);
        qemu_put_be32s(f, &s->olevel[i]);
        qemu_put_be32s(f, &s->dir[i]);
        qemu_put_be32s(f, &s->rising[i]);
        qemu_put_be32s(f, &s->falling[i]);
        qemu_put_be32s(f, &s->status[i]);
        qemu_put_be32s(f, &s->gafr[i * 2 + 0]);
        qemu_put_be32s(f, &s->gafr[i * 2 + 1]);

        qemu_put_be32s(f, &s->prev_level[i]);
    }
}

static int pxa2xx_gpio_load(QEMUFile *f, void *opaque, int version_id)
{
    struct pxa2xx_gpio_info_s *s = (struct pxa2xx_gpio_info_s *) opaque;
    int i;

    if (qemu_get_be32(f) != s->lines)
        return -EINVAL;

    for (i = 0; i < PXA2XX_GPIO_BANKS; i ++) {
        qemu_get_be32s(f, &s->ilevel[i]);
        qemu_get_be32s(f, &s->olevel[i]);
        qemu_get_be32s(f, &s->dir[i]);
        qemu_get_be32s(f, &s->rising[i]);
        qemu_get_be32s(f, &s->falling[i]);
        qemu_get_be32s(f, &s->status[i]);
        qemu_get_be32s(f, &s->gafr[i * 2 + 0]);
        qemu_get_be32s(f, &s->gafr[i * 2 + 1]);

        qemu_get_be32s(f, &s->prev_level[i]);
    }

    return 0;
}

struct pxa2xx_gpio_info_s *pxa2xx_gpio_init(target_phys_addr_t base,
                CPUState *env, qemu_irq *pic, int lines)
{
    int iomemtype;
    struct pxa2xx_gpio_info_s *s;

    s = (struct pxa2xx_gpio_info_s *)
            qemu_mallocz(sizeof(struct pxa2xx_gpio_info_s));
    memset(s, 0, sizeof(struct pxa2xx_gpio_info_s));
    s->base = base;
    s->pic = pic;
    s->lines = lines;
    s->cpu_env = env;

    iomemtype = cpu_register_io_memory(0, pxa2xx_gpio_readfn,
                    pxa2xx_gpio_writefn, s);
    cpu_register_physical_memory(base, 0x00001000, iomemtype);

    register_savevm("pxa2xx_gpio", 0, 0,
                    pxa2xx_gpio_save, pxa2xx_gpio_load, s);

    return s;
}

void pxa2xx_gpio_handler_set(struct pxa2xx_gpio_info_s *s, int line,
                gpio_handler_t handler, void *opaque) {
    if (line >= s->lines) {
        printf("%s: No GPIO pin %i\n", __FUNCTION__, line);
        return;
    }

    s->handler[line].fn = handler;
    s->handler[line].opaque = opaque;
}

/*
 * Registers a callback to notify on GPLR reads.  This normally
 * shouldn't be needed but it is used for the hack on Spitz machines.
 */
void pxa2xx_gpio_read_notifier(struct pxa2xx_gpio_info_s *s,
                void (*handler)(void *opaque), void *opaque) {
    s->read_notify = handler;
    s->opaque = opaque;
}
Commit	Line	Data
c1713132 AZ	1	/*
	2	* Intel XScale PXA255/270 GPIO controller emulation.
	3	*
	4	* Copyright (c) 2006 Openedhand Ltd.
	5	* Written by Andrzej Zaborowski <balrog@zabor.org>
	6	*
	7	* This code is licensed under the GPL.
	8	*/
	9
	10	#include "vl.h"
	11
	12	#define PXA2XX_GPIO_BANKS 4
	13
	14	struct pxa2xx_gpio_info_s {
	15	target_phys_addr_t base;
	16	qemu_irq *pic;
	17	int lines;
	18	CPUState *cpu_env;
	19
	20	/* XXX: GNU C vectors are more suitable */
	21	uint32_t ilevel[PXA2XX_GPIO_BANKS];
	22	uint32_t olevel[PXA2XX_GPIO_BANKS];
	23	uint32_t dir[PXA2XX_GPIO_BANKS];
	24	uint32_t rising[PXA2XX_GPIO_BANKS];
	25	uint32_t falling[PXA2XX_GPIO_BANKS];
	26	uint32_t status[PXA2XX_GPIO_BANKS];
2b76bdc9	27	uint32_t gpsr[PXA2XX_GPIO_BANKS];
c1713132 AZ	28	uint32_t gafr[PXA2XX_GPIO_BANKS * 2];
	29
	30	uint32_t prev_level[PXA2XX_GPIO_BANKS];
	31	struct {
	32	gpio_handler_t fn;
	33	void *opaque;
	34	} handler[PXA2XX_GPIO_BANKS * 32];
	35
	36	void (read_notify)(void opaque);
	37	void *opaque;
	38	};
	39
	40	static struct {
	41	enum {
	42	GPIO_NONE,
	43	GPLR,
	44	GPSR,
	45	GPCR,
	46	GPDR,
	47	GRER,
	48	GFER,
	49	GEDR,
	50	GAFR_L,
	51	GAFR_U,
	52	} reg;
	53	int bank;
	54	} pxa2xx_gpio_regs[0x200] = {
	55	[0 ... 0x1ff] = { GPIO_NONE, 0 },
	56	#define PXA2XX_REG(reg, a0, a1, a2, a3) \
5fafdf24	57	[a0] = { reg, 0 }, [a1] = { reg, 1 }, [a2] = { reg, 2 }, [a3] = { reg, 3 },
c1713132 AZ	58
	59	PXA2XX_REG(GPLR, 0x000, 0x004, 0x008, 0x100)
	60	PXA2XX_REG(GPSR, 0x018, 0x01c, 0x020, 0x118)
	61	PXA2XX_REG(GPCR, 0x024, 0x028, 0x02c, 0x124)
	62	PXA2XX_REG(GPDR, 0x00c, 0x010, 0x014, 0x10c)
	63	PXA2XX_REG(GRER, 0x030, 0x034, 0x038, 0x130)
	64	PXA2XX_REG(GFER, 0x03c, 0x040, 0x044, 0x13c)
	65	PXA2XX_REG(GEDR, 0x048, 0x04c, 0x050, 0x148)
	66	PXA2XX_REG(GAFR_L, 0x054, 0x05c, 0x064, 0x06c)
	67	PXA2XX_REG(GAFR_U, 0x058, 0x060, 0x068, 0x070)
	68	};
	69
	70	static void pxa2xx_gpio_irq_update(struct pxa2xx_gpio_info_s *s)
	71	{
	72	if (s->status[0] & (1 << 0))
	73	qemu_irq_raise(s->pic[PXA2XX_PIC_GPIO_0]);
	74	else
	75	qemu_irq_lower(s->pic[PXA2XX_PIC_GPIO_0]);
	76
	77	if (s->status[0] & (1 << 1))
	78	qemu_irq_raise(s->pic[PXA2XX_PIC_GPIO_1]);
	79	else
	80	qemu_irq_lower(s->pic[PXA2XX_PIC_GPIO_1]);
	81
	82	if ((s->status[0] & ~3) \| s->status[1] \| s->status[2] \| s->status[3])
	83	qemu_irq_raise(s->pic[PXA2XX_PIC_GPIO_X]);
	84	else
	85	qemu_irq_lower(s->pic[PXA2XX_PIC_GPIO_X]);
	86	}
	87
	88	/* Bitmap of pins used as standby and sleep wake-up sources. */
	89	const int pxa2xx_gpio_wake[PXA2XX_GPIO_BANKS] = {
	90	0x8003fe1b, 0x002001fc, 0xec080000, 0x0012007f,
	91	};
	92
	93	void pxa2xx_gpio_set(struct pxa2xx_gpio_info_s *s, int line, int level)
	94	{
	95	int bank;
	96	uint32_t mask;
	97
	98	if (line >= s->lines) {
	99	printf("%s: No GPIO pin %i\n", __FUNCTION__, line);
	100	return;
	101	}
	102
	103	bank = line >> 5;
	104	mask = 1 << (line & 31);
	105
	106	if (level) {
	107	s->status[bank] \|= s->rising[bank] & mask &
	108	~s->ilevel[bank] & ~s->dir[bank];
	109	s->ilevel[bank] \|= mask;
	110	} else {
	111	s->status[bank] \|= s->falling[bank] & mask &
	112	s->ilevel[bank] & ~s->dir[bank];
	113	s->ilevel[bank] &= ~mask;
	114	}
	115
	116	if (s->status[bank] & mask)
	117	pxa2xx_gpio_irq_update(s);
	118
	119	/* Wake-up GPIOs */
	120	if (s->cpu_env->halted && (mask & ~s->dir[bank] & pxa2xx_gpio_wake[bank]))
	121	cpu_interrupt(s->cpu_env, CPU_INTERRUPT_EXITTB);
122	}
123
124	static void pxa2xx_gpio_handler_update(struct pxa2xx_gpio_info_s *s) {
125	uint32_t level, diff;
126	int i, bit, line;
127	for (i = 0; i < PXA2XX_GPIO_BANKS; i ++) {
128	level = s->olevel[i] & s->dir[i];
129
130	for (diff = s->prev_level[i] ^ level; diff; diff ^= 1 << bit) {
131	bit = ffs(diff) - 1;
132	line = bit + 32 * i;
133	if (s->handler[line].fn)
134	s->handler[line].fn(line, (level >> bit) & 1,
135	s->handler[line].opaque);
136	}
137
138	s->prev_level[i] = level;
139	}
140	}
141
142	static uint32_t pxa2xx_gpio_read(void *opaque, target_phys_addr_t offset)
143	{
144	struct pxa2xx_gpio_info_s s = (struct pxa2xx_gpio_info_s ) opaque;
145	uint32_t ret;
146	int bank;
147	offset -= s->base;
148	if (offset >= 0x200)
149	return 0;
150
151	bank = pxa2xx_gpio_regs[offset].bank;
152	switch (pxa2xx_gpio_regs[offset].reg) {
153	case GPDR: /* GPIO Pin-Direction registers */
154	return s->dir[bank];
155
2b76bdc9 AZ	156	case GPSR: /* GPIO Pin-Output Set registers */
	157	printf("%s: Read from a write-only register " REG_FMT "\n",
	158	__FUNCTION__, offset);
	159	return s->gpsr[bank]; /* Return last written value. */
	160
c1713132 AZ	161	case GRER: /* GPIO Rising-Edge Detect Enable registers */
	162	return s->rising[bank];
	163
	164	case GFER: /* GPIO Falling-Edge Detect Enable registers */
	165	return s->falling[bank];
	166
	167	case GAFR_L: /* GPIO Alternate Function registers */
	168	return s->gafr[bank * 2];
	169
	170	case GAFR_U: /* GPIO Alternate Function registers */
	171	return s->gafr[bank * 2 + 1];
	172
	173	case GPLR: /* GPIO Pin-Level registers */
	174	ret = (s->olevel[bank] & s->dir[bank]) \|
	175	(s->ilevel[bank] & ~s->dir[bank]);
	176	if (s->read_notify)
	177	s->read_notify(s->opaque);
	178	return ret;
	179
	180	case GEDR: /* GPIO Edge Detect Status registers */
	181	return s->status[bank];
	182
	183	default:
	184	cpu_abort(cpu_single_env,
	185	"%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
	186	}
	187
	188	return 0;
	189	}
	190
	191	static void pxa2xx_gpio_write(void *opaque,
	192	target_phys_addr_t offset, uint32_t value)
	193	{
	194	struct pxa2xx_gpio_info_s s = (struct pxa2xx_gpio_info_s ) opaque;
	195	int bank;
	196	offset -= s->base;
	197	if (offset >= 0x200)
	198	return;
	199
	200	bank = pxa2xx_gpio_regs[offset].bank;
	201	switch (pxa2xx_gpio_regs[offset].reg) {
	202	case GPDR: /* GPIO Pin-Direction registers */
	203	s->dir[bank] = value;
	204	pxa2xx_gpio_handler_update(s);
	205	break;
	206
	207	case GPSR: /* GPIO Pin-Output Set registers */
	208	s->olevel[bank] \|= value;
	209	pxa2xx_gpio_handler_update(s);
2b76bdc9	210	s->gpsr[bank] = value;
c1713132 AZ	211	break;
	212
	213	case GPCR: /* GPIO Pin-Output Clear registers */
	214	s->olevel[bank] &= ~value;
	215	pxa2xx_gpio_handler_update(s);
	216	break;
	217
	218	case GRER: /* GPIO Rising-Edge Detect Enable registers */
	219	s->rising[bank] = value;
	220	break;
	221
	222	case GFER: /* GPIO Falling-Edge Detect Enable registers */
	223	s->falling[bank] = value;
	224	break;
	225
	226	case GAFR_L: /* GPIO Alternate Function registers */
	227	s->gafr[bank * 2] = value;
	228	break;
	229
	230	case GAFR_U: /* GPIO Alternate Function registers */
	231	s->gafr[bank * 2 + 1] = value;
	232	break;
	233
	234	case GEDR: /* GPIO Edge Detect Status registers */
	235	s->status[bank] &= ~value;
	236	pxa2xx_gpio_irq_update(s);
	237	break;
	238
	239	default:
	240	cpu_abort(cpu_single_env,
	241	"%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
	242	}
	243	}
	244
	245	static CPUReadMemoryFunc *pxa2xx_gpio_readfn[] = {
	246	pxa2xx_gpio_read,
	247	pxa2xx_gpio_read,
	248	pxa2xx_gpio_read
	249	};
	250
	251	static CPUWriteMemoryFunc *pxa2xx_gpio_writefn[] = {
	252	pxa2xx_gpio_write,
	253	pxa2xx_gpio_write,
	254	pxa2xx_gpio_write
	255	};
	256
aa941b94 AZ	257	static void pxa2xx_gpio_save(QEMUFile f, void opaque)
	258	{
	259	struct pxa2xx_gpio_info_s s = (struct pxa2xx_gpio_info_s ) opaque;
	260	int i;
	261
	262	qemu_put_be32(f, s->lines);
	263
	264	for (i = 0; i < PXA2XX_GPIO_BANKS; i ++) {
	265	qemu_put_be32s(f, &s->ilevel[i]);
	266	qemu_put_be32s(f, &s->olevel[i]);
	267	qemu_put_be32s(f, &s->dir[i]);
	268	qemu_put_be32s(f, &s->rising[i]);
	269	qemu_put_be32s(f, &s->falling[i]);
	270	qemu_put_be32s(f, &s->status[i]);
	271	qemu_put_be32s(f, &s->gafr[i * 2 + 0]);
	272	qemu_put_be32s(f, &s->gafr[i * 2 + 1]);
	273
	274	qemu_put_be32s(f, &s->prev_level[i]);
	275	}
	276	}
	277
	278	static int pxa2xx_gpio_load(QEMUFile f, void opaque, int version_id)
	279	{
	280	struct pxa2xx_gpio_info_s s = (struct pxa2xx_gpio_info_s ) opaque;
	281	int i;
	282
	283	if (qemu_get_be32(f) != s->lines)
	284	return -EINVAL;
	285
	286	for (i = 0; i < PXA2XX_GPIO_BANKS; i ++) {
	287	qemu_get_be32s(f, &s->ilevel[i]);
	288	qemu_get_be32s(f, &s->olevel[i]);
	289	qemu_get_be32s(f, &s->dir[i]);
	290	qemu_get_be32s(f, &s->rising[i]);
	291	qemu_get_be32s(f, &s->falling[i]);
	292	qemu_get_be32s(f, &s->status[i]);
	293	qemu_get_be32s(f, &s->gafr[i * 2 + 0]);
	294	qemu_get_be32s(f, &s->gafr[i * 2 + 1]);
	295
	296	qemu_get_be32s(f, &s->prev_level[i]);
	297	}
	298
	299	return 0;
	300	}
	301
c1713132 AZ	302	struct pxa2xx_gpio_info_s *pxa2xx_gpio_init(target_phys_addr_t base,
	303	CPUState env, qemu_irq pic, int lines)
	304	{
	305	int iomemtype;
	306	struct pxa2xx_gpio_info_s *s;
	307
	308	s = (struct pxa2xx_gpio_info_s *)
	309	qemu_mallocz(sizeof(struct pxa2xx_gpio_info_s));
	310	memset(s, 0, sizeof(struct pxa2xx_gpio_info_s));
	311	s->base = base;
	312	s->pic = pic;
	313	s->lines = lines;
	314	s->cpu_env = env;
	315
	316	iomemtype = cpu_register_io_memory(0, pxa2xx_gpio_readfn,
	317	pxa2xx_gpio_writefn, s);
187337f8	318	cpu_register_physical_memory(base, 0x00001000, iomemtype);
c1713132	319
aa941b94 AZ	320	register_savevm("pxa2xx_gpio", 0, 0,
	321	pxa2xx_gpio_save, pxa2xx_gpio_load, s);
	322
c1713132 AZ	323	return s;
	324	}
	325
	326	void pxa2xx_gpio_handler_set(struct pxa2xx_gpio_info_s *s, int line,
	327	gpio_handler_t handler, void *opaque) {
	328	if (line >= s->lines) {
	329	printf("%s: No GPIO pin %i\n", __FUNCTION__, line);
	330	return;
	331	}
	332
	333	s->handler[line].fn = handler;
	334	s->handler[line].opaque = opaque;
	335	}
	336
	337	/*
	338	* Registers a callback to notify on GPLR reads. This normally
	339	* shouldn't be needed but it is used for the hack on Spitz machines.
	340	*/
	341	void pxa2xx_gpio_read_notifier(struct pxa2xx_gpio_info_s *s,
	342	void (handler)(void opaque), void *opaque) {
	343	s->read_notify = handler;
	344	s->opaque = opaque;
	345	}