From 0999e87fa5b45f579670a48f168c77f6235e996f Mon Sep 17 00:00:00 2001 From: Andrey Smirnov Date: Fri, 9 Feb 2018 10:40:30 +0000 Subject: [PATCH] i.MX: Add code to emulate GPCv2 IP block MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add minimal code needed to allow upstream Linux guest to boot. Cc: Peter Maydell Cc: Jason Wang Cc: Philippe Mathieu-Daudé Cc: Marcel Apfelbaum Cc: Michael S. Tsirkin Cc: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org Cc: yurovsky@gmail.com Reviewed-by: Peter Maydell Signed-off-by: Andrey Smirnov Signed-off-by: Peter Maydell --- hw/intc/Makefile.objs | 2 +- hw/intc/imx_gpcv2.c | 125 ++++++++++++++++++++++++++++++++++++ include/hw/intc/imx_gpcv2.h | 22 +++++++ 3 files changed, 148 insertions(+), 1 deletion(-) create mode 100644 hw/intc/imx_gpcv2.c create mode 100644 include/hw/intc/imx_gpcv2.h diff --git a/hw/intc/Makefile.objs b/hw/intc/Makefile.objs index 571e094a14..0e9963f5ee 100644 --- a/hw/intc/Makefile.objs +++ b/hw/intc/Makefile.objs @@ -6,7 +6,7 @@ common-obj-$(CONFIG_XILINX) += xilinx_intc.o common-obj-$(CONFIG_XLNX_ZYNQMP) += xlnx-pmu-iomod-intc.o common-obj-$(CONFIG_XLNX_ZYNQMP) += xlnx-zynqmp-ipi.o common-obj-$(CONFIG_ETRAXFS) += etraxfs_pic.o -common-obj-$(CONFIG_IMX) += imx_avic.o +common-obj-$(CONFIG_IMX) += imx_avic.o imx_gpcv2.o common-obj-$(CONFIG_LM32) += lm32_pic.o common-obj-$(CONFIG_REALVIEW) += realview_gic.o common-obj-$(CONFIG_SLAVIO) += slavio_intctl.o diff --git a/hw/intc/imx_gpcv2.c b/hw/intc/imx_gpcv2.c new file mode 100644 index 0000000000..4eb9ce2668 --- /dev/null +++ b/hw/intc/imx_gpcv2.c @@ -0,0 +1,125 @@ +/* + * Copyright (c) 2018, Impinj, Inc. + * + * i.MX7 GPCv2 block emulation code + * + * Author: Andrey Smirnov + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "hw/intc/imx_gpcv2.h" +#include "qemu/log.h" + +#define GPC_PU_PGC_SW_PUP_REQ 0x0f8 +#define GPC_PU_PGC_SW_PDN_REQ 0x104 + +#define USB_HSIC_PHY_SW_Pxx_REQ BIT(4) +#define USB_OTG2_PHY_SW_Pxx_REQ BIT(3) +#define USB_OTG1_PHY_SW_Pxx_REQ BIT(2) +#define PCIE_PHY_SW_Pxx_REQ BIT(1) +#define MIPI_PHY_SW_Pxx_REQ BIT(0) + + +static void imx_gpcv2_reset(DeviceState *dev) +{ + IMXGPCv2State *s = IMX_GPCV2(dev); + + memset(s->regs, 0, sizeof(s->regs)); +} + +static uint64_t imx_gpcv2_read(void *opaque, hwaddr offset, + unsigned size) +{ + IMXGPCv2State *s = opaque; + + return s->regs[offset / sizeof(uint32_t)]; +} + +static void imx_gpcv2_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ + IMXGPCv2State *s = opaque; + const size_t idx = offset / sizeof(uint32_t); + + s->regs[idx] = value; + + /* + * Real HW will clear those bits once as a way to indicate that + * power up request is complete + */ + if (offset == GPC_PU_PGC_SW_PUP_REQ || + offset == GPC_PU_PGC_SW_PDN_REQ) { + s->regs[idx] &= ~(USB_HSIC_PHY_SW_Pxx_REQ | + USB_OTG2_PHY_SW_Pxx_REQ | + USB_OTG1_PHY_SW_Pxx_REQ | + PCIE_PHY_SW_Pxx_REQ | + MIPI_PHY_SW_Pxx_REQ); + } +} + +static const struct MemoryRegionOps imx_gpcv2_ops = { + .read = imx_gpcv2_read, + .write = imx_gpcv2_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .impl = { + /* + * Our device would not work correctly if the guest was doing + * unaligned access. This might not be a limitation on the real + * device but in practice there is no reason for a guest to access + * this device unaligned. + */ + .min_access_size = 4, + .max_access_size = 4, + .unaligned = false, + }, +}; + +static void imx_gpcv2_init(Object *obj) +{ + SysBusDevice *sd = SYS_BUS_DEVICE(obj); + IMXGPCv2State *s = IMX_GPCV2(obj); + + memory_region_init_io(&s->iomem, + obj, + &imx_gpcv2_ops, + s, + TYPE_IMX_GPCV2 ".iomem", + sizeof(s->regs)); + sysbus_init_mmio(sd, &s->iomem); +} + +static const VMStateDescription vmstate_imx_gpcv2 = { + .name = TYPE_IMX_GPCV2, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32_ARRAY(regs, IMXGPCv2State, GPC_NUM), + VMSTATE_END_OF_LIST() + }, +}; + +static void imx_gpcv2_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->reset = imx_gpcv2_reset; + dc->vmsd = &vmstate_imx_gpcv2; + dc->desc = "i.MX GPCv2 Module"; +} + +static const TypeInfo imx_gpcv2_info = { + .name = TYPE_IMX_GPCV2, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(IMXGPCv2State), + .instance_init = imx_gpcv2_init, + .class_init = imx_gpcv2_class_init, +}; + +static void imx_gpcv2_register_type(void) +{ + type_register_static(&imx_gpcv2_info); +} +type_init(imx_gpcv2_register_type) diff --git a/include/hw/intc/imx_gpcv2.h b/include/hw/intc/imx_gpcv2.h new file mode 100644 index 0000000000..ed978b24bb --- /dev/null +++ b/include/hw/intc/imx_gpcv2.h @@ -0,0 +1,22 @@ +#ifndef IMX_GPCV2_H +#define IMX_GPCV2_H + +#include "hw/sysbus.h" + +enum IMXGPCv2Registers { + GPC_NUM = 0xE00 / sizeof(uint32_t), +}; + +typedef struct IMXGPCv2State { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion iomem; + uint32_t regs[GPC_NUM]; +} IMXGPCv2State; + +#define TYPE_IMX_GPCV2 "imx-gpcv2" +#define IMX_GPCV2(obj) OBJECT_CHECK(IMXGPCv2State, (obj), TYPE_IMX_GPCV2) + +#endif /* IMX_GPCV2_H */