hw/gpio/pl061.c - qemu - Git at Google

 /*
  * Arm PrimeCell PL061 General Purpose IO with additional
  * Luminary Micro Stellaris bits.
  *
  * Copyright (c) 2007 CodeSourcery.
  * Written by Paul Brook
  *
  * This code is licensed under the GPL.
  */

 #include "hw/sysbus.h"

 //#define DEBUG_PL061 1

 #ifdef DEBUG_PL061
 #define DPRINTF(fmt, ...) \
 do { printf("pl061: " fmt , ## __VA_ARGS__); } while (0)
 #define BADF(fmt, ...) \
 do { fprintf(stderr, "pl061: error: " fmt , ## __VA_ARGS__); exit(1);} while (0)
 #else
 #define DPRINTF(fmt, ...) do {} while(0)
 #define BADF(fmt, ...) \
 do { fprintf(stderr, "pl061: error: " fmt , ## __VA_ARGS__);} while (0)
 #endif

 static const uint8_t pl061_id[12] =
   { 0x00, 0x00, 0x00, 0x00, 0x61, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
 static const uint8_t pl061_id_luminary[12] =
   { 0x00, 0x00, 0x00, 0x00, 0x61, 0x00, 0x18, 0x01, 0x0d, 0xf0, 0x05, 0xb1 };

 typedef struct {
     SysBusDevice busdev;
     MemoryRegion iomem;
     uint32_t locked;
     uint32_t data;
     uint32_t old_data;
     uint32_t dir;
     uint32_t isense;
     uint32_t ibe;
     uint32_t iev;
     uint32_t im;
     uint32_t istate;
     uint32_t afsel;
     uint32_t dr2r;
     uint32_t dr4r;
     uint32_t dr8r;
     uint32_t odr;
     uint32_t pur;
     uint32_t pdr;
     uint32_t slr;
     uint32_t den;
     uint32_t cr;
     uint32_t float_high;
     uint32_t amsel;
     qemu_irq irq;
     qemu_irq out[8];
     const unsigned char *id;
 } pl061_state;

 static const VMStateDescription vmstate_pl061 = {
     .name = "pl061",
     .version_id = 2,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
         VMSTATE_UINT32(locked, pl061_state),
         VMSTATE_UINT32(data, pl061_state),
         VMSTATE_UINT32(old_data, pl061_state),
         VMSTATE_UINT32(dir, pl061_state),
         VMSTATE_UINT32(isense, pl061_state),
         VMSTATE_UINT32(ibe, pl061_state),
         VMSTATE_UINT32(iev, pl061_state),
         VMSTATE_UINT32(im, pl061_state),
         VMSTATE_UINT32(istate, pl061_state),
         VMSTATE_UINT32(afsel, pl061_state),
         VMSTATE_UINT32(dr2r, pl061_state),
         VMSTATE_UINT32(dr4r, pl061_state),
         VMSTATE_UINT32(dr8r, pl061_state),
         VMSTATE_UINT32(odr, pl061_state),
         VMSTATE_UINT32(pur, pl061_state),
         VMSTATE_UINT32(pdr, pl061_state),
         VMSTATE_UINT32(slr, pl061_state),
         VMSTATE_UINT32(den, pl061_state),
         VMSTATE_UINT32(cr, pl061_state),
         VMSTATE_UINT32(float_high, pl061_state),
         VMSTATE_UINT32_V(amsel, pl061_state, 2),
         VMSTATE_END_OF_LIST()
     }
 };

 static void pl061_update(pl061_state *s)
 {
     uint8_t changed;
     uint8_t mask;
     uint8_t out;
     int i;

     /* Outputs float high.  */
     /* FIXME: This is board dependent.  */
     out = (s->data & s->dir) | ~s->dir;
     changed = s->old_data ^ out;
     if (!changed)
         return;

     s->old_data = out;
     for (i = 0; i < 8; i++) {
         mask = 1 << i;
         if (changed & mask) {
             DPRINTF("Set output %d = %d\n", i, (out & mask) != 0);
             qemu_set_irq(s->out[i], (out & mask) != 0);
         }
     }

     /* FIXME: Implement input interrupts.  */
 }

 static uint64_t pl061_read(void *opaque, hwaddr offset,
                            unsigned size)
 {
     pl061_state *s = (pl061_state *)opaque;

     if (offset >= 0xfd0 && offset < 0x1000) {
         return s->id[(offset - 0xfd0) >> 2];
     }
     if (offset < 0x400) {
         return s->data & (offset >> 2);
     }
     switch (offset) {
     case 0x400: /* Direction */
         return s->dir;
     case 0x404: /* Interrupt sense */
         return s->isense;
     case 0x408: /* Interrupt both edges */
         return s->ibe;
     case 0x40c: /* Interrupt event */
         return s->iev;
     case 0x410: /* Interrupt mask */
         return s->im;
     case 0x414: /* Raw interrupt status */
         return s->istate;
     case 0x418: /* Masked interrupt status */
         return s->istate | s->im;
     case 0x420: /* Alternate function select */
         return s->afsel;
     case 0x500: /* 2mA drive */
         return s->dr2r;
     case 0x504: /* 4mA drive */
         return s->dr4r;
     case 0x508: /* 8mA drive */
         return s->dr8r;
     case 0x50c: /* Open drain */
         return s->odr;
     case 0x510: /* Pull-up */
         return s->pur;
     case 0x514: /* Pull-down */
         return s->pdr;
     case 0x518: /* Slew rate control */
         return s->slr;
     case 0x51c: /* Digital enable */
         return s->den;
     case 0x520: /* Lock */
         return s->locked;
     case 0x524: /* Commit */
         return s->cr;
     case 0x528: /* Analog mode select */
         return s->amsel;
     default:
         qemu_log_mask(LOG_GUEST_ERROR,
                       "pl061_read: Bad offset %x\n", (int)offset);
         return 0;
     }
 }

 static void pl061_write(void *opaque, hwaddr offset,
                         uint64_t value, unsigned size)
 {
     pl061_state *s = (pl061_state *)opaque;
     uint8_t mask;

     if (offset < 0x400) {
         mask = (offset >> 2) & s->dir;
         s->data = (s->data & ~mask) | (value & mask);
         pl061_update(s);
         return;
     }
     switch (offset) {
     case 0x400: /* Direction */
         s->dir = value & 0xff;
         break;
     case 0x404: /* Interrupt sense */
         s->isense = value & 0xff;
         break;
     case 0x408: /* Interrupt both edges */
         s->ibe = value & 0xff;
         break;
     case 0x40c: /* Interrupt event */
         s->iev = value & 0xff;
         break;
     case 0x410: /* Interrupt mask */
         s->im = value & 0xff;
         break;
     case 0x41c: /* Interrupt clear */
         s->istate &= ~value;
         break;
     case 0x420: /* Alternate function select */
         mask = s->cr;
         s->afsel = (s->afsel & ~mask) | (value & mask);
         break;
     case 0x500: /* 2mA drive */
         s->dr2r = value & 0xff;
         break;
     case 0x504: /* 4mA drive */
         s->dr4r = value & 0xff;
         break;
     case 0x508: /* 8mA drive */
         s->dr8r = value & 0xff;
         break;
     case 0x50c: /* Open drain */
         s->odr = value & 0xff;
         break;
     case 0x510: /* Pull-up */
         s->pur = value & 0xff;
         break;
     case 0x514: /* Pull-down */
         s->pdr = value & 0xff;
         break;
     case 0x518: /* Slew rate control */
         s->slr = value & 0xff;
         break;
     case 0x51c: /* Digital enable */
         s->den = value & 0xff;
         break;
     case 0x520: /* Lock */
         s->locked = (value != 0xacce551);
         break;
     case 0x524: /* Commit */
         if (!s->locked)
             s->cr = value & 0xff;
         break;
     case 0x528:
         s->amsel = value & 0xff;
         break;
     default:
         qemu_log_mask(LOG_GUEST_ERROR,
                       "pl061_write: Bad offset %x\n", (int)offset);
     }
     pl061_update(s);
 }

 static void pl061_reset(pl061_state *s)
 {
   s->locked = 1;
   s->cr = 0xff;
 }

 static void pl061_set_irq(void * opaque, int irq, int level)
 {
     pl061_state *s = (pl061_state *)opaque;
     uint8_t mask;

     mask = 1 << irq;
     if ((s->dir & mask) == 0) {
         s->data &= ~mask;
         if (level)
             s->data |= mask;
         pl061_update(s);
     }
 }

 static const MemoryRegionOps pl061_ops = {
     .read = pl061_read,
     .write = pl061_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
 };

 static int pl061_init(SysBusDevice *dev, const unsigned char *id)
 {
     pl061_state *s = FROM_SYSBUS(pl061_state, dev);
     s->id = id;
     memory_region_init_io(&s->iomem, OBJECT(s), &pl061_ops, s, "pl061", 0x1000);
     sysbus_init_mmio(dev, &s->iomem);
     sysbus_init_irq(dev, &s->irq);
     qdev_init_gpio_in(&dev->qdev, pl061_set_irq, 8);
     qdev_init_gpio_out(&dev->qdev, s->out, 8);
     pl061_reset(s);
     return 0;
 }

 static int pl061_init_luminary(SysBusDevice *dev)
 {
     return pl061_init(dev, pl061_id_luminary);
 }

 static int pl061_init_arm(SysBusDevice *dev)
 {
     return pl061_init(dev, pl061_id);
 }

 static void pl061_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

     k->init = pl061_init_arm;
     dc->vmsd = &vmstate_pl061;
 }

 static const TypeInfo pl061_info = {
     .name          = "pl061",
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(pl061_state),
     .class_init    = pl061_class_init,
 };

 static void pl061_luminary_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

     k->init = pl061_init_luminary;
     dc->vmsd = &vmstate_pl061;
 }

 static const TypeInfo pl061_luminary_info = {
     .name          = "pl061_luminary",
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(pl061_state),
     .class_init    = pl061_luminary_class_init,
 };

 static void pl061_register_types(void)
 {
     type_register_static(&pl061_info);
     type_register_static(&pl061_luminary_info);
 }

 type_init(pl061_register_types)
	/*
	* Arm PrimeCell PL061 General Purpose IO with additional
	* Luminary Micro Stellaris bits.
	*
	* Copyright (c) 2007 CodeSourcery.
	* Written by Paul Brook
	*
	* This code is licensed under the GPL.
	*/

	#include "hw/sysbus.h"

	//#define DEBUG_PL061 1

	#ifdef DEBUG_PL061
	#define DPRINTF(fmt, ...) \
	do { printf("pl061: " fmt , ## __VA_ARGS__); } while (0)
	#define BADF(fmt, ...) \
	do { fprintf(stderr, "pl061: error: " fmt , ## __VA_ARGS__); exit(1);} while (0)
	#else
	#define DPRINTF(fmt, ...) do {} while(0)
	#define BADF(fmt, ...) \
	do { fprintf(stderr, "pl061: error: " fmt , ## __VA_ARGS__);} while (0)
	#endif

	static const uint8_t pl061_id[12] =
	{ 0x00, 0x00, 0x00, 0x00, 0x61, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
	static const uint8_t pl061_id_luminary[12] =
	{ 0x00, 0x00, 0x00, 0x00, 0x61, 0x00, 0x18, 0x01, 0x0d, 0xf0, 0x05, 0xb1 };

	typedef struct {
	SysBusDevice busdev;
	MemoryRegion iomem;
	uint32_t locked;
	uint32_t data;
	uint32_t old_data;
	uint32_t dir;
	uint32_t isense;
	uint32_t ibe;
	uint32_t iev;
	uint32_t im;
	uint32_t istate;
	uint32_t afsel;
	uint32_t dr2r;
	uint32_t dr4r;
	uint32_t dr8r;
	uint32_t odr;
	uint32_t pur;
	uint32_t pdr;
	uint32_t slr;
	uint32_t den;
	uint32_t cr;
	uint32_t float_high;
	uint32_t amsel;
	qemu_irq irq;
	qemu_irq out[8];
	const unsigned char *id;
	} pl061_state;

	static const VMStateDescription vmstate_pl061 = {
	.name = "pl061",
	.version_id = 2,
	.minimum_version_id = 1,
	.fields = (VMStateField[]) {
	VMSTATE_UINT32(locked, pl061_state),
	VMSTATE_UINT32(data, pl061_state),
	VMSTATE_UINT32(old_data, pl061_state),
	VMSTATE_UINT32(dir, pl061_state),
	VMSTATE_UINT32(isense, pl061_state),
	VMSTATE_UINT32(ibe, pl061_state),
	VMSTATE_UINT32(iev, pl061_state),
	VMSTATE_UINT32(im, pl061_state),
	VMSTATE_UINT32(istate, pl061_state),
	VMSTATE_UINT32(afsel, pl061_state),
	VMSTATE_UINT32(dr2r, pl061_state),
	VMSTATE_UINT32(dr4r, pl061_state),
	VMSTATE_UINT32(dr8r, pl061_state),
	VMSTATE_UINT32(odr, pl061_state),
	VMSTATE_UINT32(pur, pl061_state),
	VMSTATE_UINT32(pdr, pl061_state),
	VMSTATE_UINT32(slr, pl061_state),
	VMSTATE_UINT32(den, pl061_state),
	VMSTATE_UINT32(cr, pl061_state),
	VMSTATE_UINT32(float_high, pl061_state),
	VMSTATE_UINT32_V(amsel, pl061_state, 2),
	VMSTATE_END_OF_LIST()
	}
	};

	static void pl061_update(pl061_state *s)
	{
	uint8_t changed;
	uint8_t mask;
	uint8_t out;
	int i;

	/* Outputs float high. */
	/* FIXME: This is board dependent. */
	out = (s->data & s->dir) \| ~s->dir;
	changed = s->old_data ^ out;
	if (!changed)
	return;

	s->old_data = out;
	for (i = 0; i < 8; i++) {
	mask = 1 << i;
	if (changed & mask) {
	DPRINTF("Set output %d = %d\n", i, (out & mask) != 0);
	qemu_set_irq(s->out[i], (out & mask) != 0);
	}
	}

	/* FIXME: Implement input interrupts. */
	}

	static uint64_t pl061_read(void *opaque, hwaddr offset,
	unsigned size)
	{
	pl061_state s = (pl061_state )opaque;

	if (offset >= 0xfd0 && offset < 0x1000) {
	return s->id[(offset - 0xfd0) >> 2];
	}
	if (offset < 0x400) {
	return s->data & (offset >> 2);
	}
	switch (offset) {
	case 0x400: /* Direction */
	return s->dir;
	case 0x404: /* Interrupt sense */
	return s->isense;
	case 0x408: /* Interrupt both edges */
	return s->ibe;
	case 0x40c: /* Interrupt event */
	return s->iev;
	case 0x410: /* Interrupt mask */
	return s->im;
	case 0x414: /* Raw interrupt status */
	return s->istate;
	case 0x418: /* Masked interrupt status */
	return s->istate \| s->im;
	case 0x420: /* Alternate function select */
	return s->afsel;
	case 0x500: /* 2mA drive */
	return s->dr2r;
	case 0x504: /* 4mA drive */
	return s->dr4r;
	case 0x508: /* 8mA drive */
	return s->dr8r;
	case 0x50c: /* Open drain */
	return s->odr;
	case 0x510: /* Pull-up */
	return s->pur;
	case 0x514: /* Pull-down */
	return s->pdr;
	case 0x518: /* Slew rate control */
	return s->slr;
	case 0x51c: /* Digital enable */
	return s->den;
	case 0x520: /* Lock */
	return s->locked;
	case 0x524: /* Commit */
	return s->cr;
	case 0x528: /* Analog mode select */
	return s->amsel;
	default:
	qemu_log_mask(LOG_GUEST_ERROR,
	"pl061_read: Bad offset %x\n", (int)offset);
	return 0;
	}
	}

	static void pl061_write(void *opaque, hwaddr offset,
	uint64_t value, unsigned size)
	{
	pl061_state s = (pl061_state )opaque;
	uint8_t mask;

	if (offset < 0x400) {
	mask = (offset >> 2) & s->dir;
	s->data = (s->data & ~mask) \| (value & mask);
	pl061_update(s);
	return;
	}
	switch (offset) {
	case 0x400: /* Direction */
	s->dir = value & 0xff;
	break;
	case 0x404: /* Interrupt sense */
	s->isense = value & 0xff;
	break;
	case 0x408: /* Interrupt both edges */
	s->ibe = value & 0xff;
	break;
	case 0x40c: /* Interrupt event */
	s->iev = value & 0xff;
	break;
	case 0x410: /* Interrupt mask */
	s->im = value & 0xff;
	break;
	case 0x41c: /* Interrupt clear */
	s->istate &= ~value;
	break;
	case 0x420: /* Alternate function select */
	mask = s->cr;
	s->afsel = (s->afsel & ~mask) \| (value & mask);
	break;
	case 0x500: /* 2mA drive */
	s->dr2r = value & 0xff;
	break;
	case 0x504: /* 4mA drive */
	s->dr4r = value & 0xff;
	break;
	case 0x508: /* 8mA drive */
	s->dr8r = value & 0xff;
	break;
	case 0x50c: /* Open drain */
	s->odr = value & 0xff;
	break;
	case 0x510: /* Pull-up */
	s->pur = value & 0xff;
	break;
	case 0x514: /* Pull-down */
	s->pdr = value & 0xff;
	break;
	case 0x518: /* Slew rate control */
	s->slr = value & 0xff;
	break;
	case 0x51c: /* Digital enable */
	s->den = value & 0xff;
	break;
	case 0x520: /* Lock */
	s->locked = (value != 0xacce551);
	break;
	case 0x524: /* Commit */
	if (!s->locked)
	s->cr = value & 0xff;
	break;
	case 0x528:
	s->amsel = value & 0xff;
	break;
	default:
	qemu_log_mask(LOG_GUEST_ERROR,
	"pl061_write: Bad offset %x\n", (int)offset);
	}
	pl061_update(s);
	}

	static void pl061_reset(pl061_state *s)
	{
	s->locked = 1;
	s->cr = 0xff;
	}

	static void pl061_set_irq(void * opaque, int irq, int level)
	{
	pl061_state s = (pl061_state )opaque;
	uint8_t mask;

	mask = 1 << irq;
	if ((s->dir & mask) == 0) {
	s->data &= ~mask;
	if (level)
	s->data \|= mask;
	pl061_update(s);
	}
	}

	static const MemoryRegionOps pl061_ops = {
	.read = pl061_read,
	.write = pl061_write,
	.endianness = DEVICE_NATIVE_ENDIAN,
	};

	static int pl061_init(SysBusDevice dev, const unsigned char id)
	{
	pl061_state *s = FROM_SYSBUS(pl061_state, dev);
	s->id = id;
	memory_region_init_io(&s->iomem, OBJECT(s), &pl061_ops, s, "pl061", 0x1000);
	sysbus_init_mmio(dev, &s->iomem);
	sysbus_init_irq(dev, &s->irq);
	qdev_init_gpio_in(&dev->qdev, pl061_set_irq, 8);
	qdev_init_gpio_out(&dev->qdev, s->out, 8);
	pl061_reset(s);
	return 0;
	}

	static int pl061_init_luminary(SysBusDevice *dev)
	{
	return pl061_init(dev, pl061_id_luminary);
	}

	static int pl061_init_arm(SysBusDevice *dev)
	{
	return pl061_init(dev, pl061_id);
	}

	static void pl061_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

	k->init = pl061_init_arm;
	dc->vmsd = &vmstate_pl061;
	}

	static const TypeInfo pl061_info = {
	.name = "pl061",
	.parent = TYPE_SYS_BUS_DEVICE,
	.instance_size = sizeof(pl061_state),
	.class_init = pl061_class_init,
	};

	static void pl061_luminary_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

	k->init = pl061_init_luminary;
	dc->vmsd = &vmstate_pl061;
	}

	static const TypeInfo pl061_luminary_info = {
	.name = "pl061_luminary",
	.parent = TYPE_SYS_BUS_DEVICE,
	.instance_size = sizeof(pl061_state),
	.class_init = pl061_luminary_class_init,
	};

	static void pl061_register_types(void)
	{
	type_register_static(&pl061_info);
	type_register_static(&pl061_luminary_info);
	}

	type_init(pl061_register_types)