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mac_newworld: add gpios to macio devices with PMU enabled
PMU-enabled New World Macs expose their GPIOs via a separate memory region within the macio device. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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common-obj-y += macio.o | ||
common-obj-$(CONFIG_CUDA) += cuda.o | ||
common-obj-$(CONFIG_MAC_DBDMA) += mac_dbdma.o | ||
common-obj-$(CONFIG_MACIO_GPIO) += gpio.o |
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/* | ||
* PowerMac NewWorld MacIO GPIO emulation | ||
* | ||
* Copyright (c) 2016 Benjamin Herrenschmidt | ||
* Copyright (c) 2018 Mark Cave-Ayland | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in | ||
* all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
* THE SOFTWARE. | ||
*/ | ||
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||
#include "qemu/osdep.h" | ||
#include "hw/hw.h" | ||
#include "hw/ppc/mac.h" | ||
#include "hw/misc/macio/macio.h" | ||
#include "hw/misc/macio/gpio.h" | ||
#include "qemu/log.h" | ||
#include "trace.h" | ||
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void macio_set_gpio(MacIOGPIOState *s, uint32_t gpio, bool state) | ||
{ | ||
uint8_t new_reg; | ||
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trace_macio_set_gpio(gpio, state); | ||
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if (s->gpio_regs[gpio] & 4) { | ||
qemu_log_mask(LOG_GUEST_ERROR, | ||
"GPIO: Setting GPIO %d while it's an output\n", gpio); | ||
} | ||
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new_reg = s->gpio_regs[gpio] & ~2; | ||
if (state) { | ||
new_reg |= 2; | ||
} | ||
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if (new_reg == s->gpio_regs[gpio]) { | ||
return; | ||
} | ||
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s->gpio_regs[gpio] = new_reg; | ||
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/* This is will work until we fix the binding between MacIO and | ||
* the MPIC properly so we can route all GPIOs and avoid going | ||
* via the top level platform code. | ||
* | ||
* Note that we probably need to get access to the MPIC config to | ||
* decode polarity since qemu always use "raise" regardless. | ||
* | ||
* For now, we hard wire known GPIOs | ||
*/ | ||
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switch (gpio) { | ||
case 1: | ||
/* Level low */ | ||
if (!state) { | ||
trace_macio_gpio_irq_assert(gpio); | ||
qemu_irq_raise(s->gpio_extirqs[gpio]); | ||
} else { | ||
trace_macio_gpio_irq_deassert(gpio); | ||
qemu_irq_lower(s->gpio_extirqs[gpio]); | ||
} | ||
break; | ||
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case 9: | ||
/* Edge, triggered by NMI below */ | ||
if (state) { | ||
trace_macio_gpio_irq_assert(gpio); | ||
qemu_irq_raise(s->gpio_extirqs[gpio]); | ||
} else { | ||
trace_macio_gpio_irq_deassert(gpio); | ||
qemu_irq_lower(s->gpio_extirqs[gpio]); | ||
} | ||
break; | ||
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default: | ||
qemu_log_mask(LOG_UNIMP, "GPIO: setting unimplemented GPIO %d", gpio); | ||
} | ||
} | ||
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static void macio_gpio_write(void *opaque, hwaddr addr, uint64_t value, | ||
unsigned size) | ||
{ | ||
MacIOGPIOState *s = opaque; | ||
uint8_t ibit; | ||
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trace_macio_gpio_write(addr, value); | ||
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/* Levels regs are read-only */ | ||
if (addr < 8) { | ||
return; | ||
} | ||
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addr -= 8; | ||
if (addr < 36) { | ||
value &= ~2; | ||
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if (value & 4) { | ||
ibit = (value & 1) << 1; | ||
} else { | ||
ibit = s->gpio_regs[addr] & 2; | ||
} | ||
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s->gpio_regs[addr] = value | ibit; | ||
} | ||
} | ||
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static uint64_t macio_gpio_read(void *opaque, hwaddr addr, unsigned size) | ||
{ | ||
MacIOGPIOState *s = opaque; | ||
uint64_t val = 0; | ||
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/* Levels regs */ | ||
if (addr < 8) { | ||
val = s->gpio_levels[addr]; | ||
} else { | ||
addr -= 8; | ||
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if (addr < 36) { | ||
val = s->gpio_regs[addr]; | ||
} | ||
} | ||
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trace_macio_gpio_write(addr, val); | ||
return val; | ||
} | ||
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static const MemoryRegionOps macio_gpio_ops = { | ||
.read = macio_gpio_read, | ||
.write = macio_gpio_write, | ||
.endianness = DEVICE_LITTLE_ENDIAN, | ||
.impl = { | ||
.min_access_size = 1, | ||
.max_access_size = 1, | ||
}, | ||
}; | ||
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static void macio_gpio_realize(DeviceState *dev, Error **errp) | ||
{ | ||
MacIOGPIOState *s = MACIO_GPIO(dev); | ||
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s->gpio_extirqs[1] = qdev_get_gpio_in(DEVICE(s->pic), | ||
NEWWORLD_EXTING_GPIO1); | ||
s->gpio_extirqs[9] = qdev_get_gpio_in(DEVICE(s->pic), | ||
NEWWORLD_EXTING_GPIO9); | ||
} | ||
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static void macio_gpio_init(Object *obj) | ||
{ | ||
SysBusDevice *sbd = SYS_BUS_DEVICE(obj); | ||
MacIOGPIOState *s = MACIO_GPIO(obj); | ||
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object_property_add_link(obj, "pic", TYPE_OPENPIC, | ||
(Object **) &s->pic, | ||
qdev_prop_allow_set_link_before_realize, | ||
0, NULL); | ||
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memory_region_init_io(&s->gpiomem, OBJECT(s), &macio_gpio_ops, obj, | ||
"gpio", 0x30); | ||
sysbus_init_mmio(sbd, &s->gpiomem); | ||
} | ||
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static const VMStateDescription vmstate_macio_gpio = { | ||
.name = "macio_gpio", | ||
.version_id = 0, | ||
.minimum_version_id = 0, | ||
.fields = (VMStateField[]) { | ||
VMSTATE_UINT8_ARRAY(gpio_levels, MacIOGPIOState, 8), | ||
VMSTATE_UINT8_ARRAY(gpio_regs, MacIOGPIOState, 36), | ||
VMSTATE_END_OF_LIST() | ||
} | ||
}; | ||
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static void macio_gpio_reset(DeviceState *dev) | ||
{ | ||
MacIOGPIOState *s = MACIO_GPIO(dev); | ||
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/* GPIO 1 is up by default */ | ||
macio_set_gpio(s, 1, true); | ||
} | ||
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static void macio_gpio_class_init(ObjectClass *oc, void *data) | ||
{ | ||
DeviceClass *dc = DEVICE_CLASS(oc); | ||
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dc->realize = macio_gpio_realize; | ||
dc->reset = macio_gpio_reset; | ||
dc->vmsd = &vmstate_macio_gpio; | ||
} | ||
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static const TypeInfo macio_gpio_init_info = { | ||
.name = TYPE_MACIO_GPIO, | ||
.parent = TYPE_SYS_BUS_DEVICE, | ||
.instance_size = sizeof(MacIOGPIOState), | ||
.instance_init = macio_gpio_init, | ||
.class_init = macio_gpio_class_init, | ||
}; | ||
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static void macio_gpio_register_types(void) | ||
{ | ||
type_register_static(&macio_gpio_init_info); | ||
} | ||
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type_init(macio_gpio_register_types) |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,47 @@ | ||
/* | ||
* PowerMac NewWorld MacIO GPIO emulation | ||
* | ||
* Copyright (c) 2016 Benjamin Herrenschmidt | ||
* Copyright (c) 2018 Mark Cave-Ayland | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to deal | ||
* in the Software without restriction, including without limitation the rights | ||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in | ||
* all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | ||
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
* THE SOFTWARE. | ||
*/ | ||
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#ifndef MACIO_GPIO_H | ||
#define MACIO_GPIO_H | ||
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#define TYPE_MACIO_GPIO "macio-gpio" | ||
#define MACIO_GPIO(obj) OBJECT_CHECK(MacIOGPIOState, (obj), TYPE_MACIO_GPIO) | ||
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typedef struct MacIOGPIOState { | ||
/*< private >*/ | ||
SysBusDevice parent; | ||
/*< public >*/ | ||
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OpenPICState *pic; | ||
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MemoryRegion gpiomem; | ||
qemu_irq gpio_extirqs[10]; | ||
uint8_t gpio_levels[8]; | ||
uint8_t gpio_regs[36]; /* XXX Check count */ | ||
} MacIOGPIOState; | ||
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void macio_set_gpio(MacIOGPIOState *s, uint32_t gpio, bool state); | ||
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#endif |
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