From a24273bba858d61f75ab0e98871f7691988fd0ce Mon Sep 17 00:00:00 2001 From: Andrey Smirnov Date: Fri, 9 Feb 2018 10:40:30 +0000 Subject: [PATCH] usb: Add basic code to emulate Chipidea USB IP MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add code to emulate Chipidea USB IP (used in i.MX SoCs). Tested to work against: -usb -drive if=none,id=stick,file=usb.img,format=raw -device \ usb-storage,bus=usb-bus.0,drive=stick 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/usb/Makefile.objs | 1 + hw/usb/chipidea.c | 176 ++++++++++++++++++++++++++++++++++++++ include/hw/usb/chipidea.h | 16 ++++ 3 files changed, 193 insertions(+) create mode 100644 hw/usb/chipidea.c create mode 100644 include/hw/usb/chipidea.h diff --git a/hw/usb/Makefile.objs b/hw/usb/Makefile.objs index fbcd498c59..41be700812 100644 --- a/hw/usb/Makefile.objs +++ b/hw/usb/Makefile.objs @@ -12,6 +12,7 @@ common-obj-$(CONFIG_USB_XHCI_NEC) += hcd-xhci-nec.o common-obj-$(CONFIG_USB_MUSB) += hcd-musb.o obj-$(CONFIG_TUSB6010) += tusb6010.o +obj-$(CONFIG_IMX) += chipidea.o # emulated usb devices common-obj-$(CONFIG_USB) += dev-hub.o diff --git a/hw/usb/chipidea.c b/hw/usb/chipidea.c new file mode 100644 index 0000000000..60d67f88b8 --- /dev/null +++ b/hw/usb/chipidea.c @@ -0,0 +1,176 @@ +/* + * Copyright (c) 2018, Impinj, Inc. + * + * Chipidea USB 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/usb/hcd-ehci.h" +#include "hw/usb/chipidea.h" +#include "qemu/log.h" + +enum { + CHIPIDEA_USBx_DCIVERSION = 0x000, + CHIPIDEA_USBx_DCCPARAMS = 0x004, + CHIPIDEA_USBx_DCCPARAMS_HC = BIT(8), +}; + +static uint64_t chipidea_read(void *opaque, hwaddr offset, + unsigned size) +{ + return 0; +} + +static void chipidea_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ +} + +static const struct MemoryRegionOps chipidea_ops = { + .read = chipidea_read, + .write = chipidea_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 uint64_t chipidea_dc_read(void *opaque, hwaddr offset, + unsigned size) +{ + switch (offset) { + case CHIPIDEA_USBx_DCIVERSION: + return 0x1; + case CHIPIDEA_USBx_DCCPARAMS: + /* + * Real hardware (at least i.MX7) will also report the + * controller as "Device Capable" (and 8 supported endpoints), + * but there doesn't seem to be much point in doing so, since + * we don't emulate that part. + */ + return CHIPIDEA_USBx_DCCPARAMS_HC; + } + + return 0; +} + +static void chipidea_dc_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ +} + +static const struct MemoryRegionOps chipidea_dc_ops = { + .read = chipidea_dc_read, + .write = chipidea_dc_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 chipidea_init(Object *obj) +{ + EHCIState *ehci = &SYS_BUS_EHCI(obj)->ehci; + ChipideaState *ci = CHIPIDEA(obj); + int i; + + for (i = 0; i < ARRAY_SIZE(ci->iomem); i++) { + const struct { + const char *name; + hwaddr offset; + uint64_t size; + const struct MemoryRegionOps *ops; + } regions[ARRAY_SIZE(ci->iomem)] = { + /* + * Registers located between offsets 0x000 and 0xFC + */ + { + .name = TYPE_CHIPIDEA ".misc", + .offset = 0x000, + .size = 0x100, + .ops = &chipidea_ops, + }, + /* + * Registers located between offsets 0x1A4 and 0x1DC + */ + { + .name = TYPE_CHIPIDEA ".endpoints", + .offset = 0x1A4, + .size = 0x1DC - 0x1A4 + 4, + .ops = &chipidea_ops, + }, + /* + * USB_x_DCIVERSION and USB_x_DCCPARAMS + */ + { + .name = TYPE_CHIPIDEA ".dc", + .offset = 0x120, + .size = 8, + .ops = &chipidea_dc_ops, + }, + }; + + memory_region_init_io(&ci->iomem[i], + obj, + regions[i].ops, + ci, + regions[i].name, + regions[i].size); + + memory_region_add_subregion(&ehci->mem, + regions[i].offset, + &ci->iomem[i]); + } +} + +static void chipidea_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + SysBusEHCIClass *sec = SYS_BUS_EHCI_CLASS(klass); + + /* + * Offsets used were taken from i.MX7Dual Applications Processor + * Reference Manual, Rev 0.1, p. 3177, Table 11-59 + */ + sec->capsbase = 0x100; + sec->opregbase = 0x140; + sec->portnr = 1; + + set_bit(DEVICE_CATEGORY_USB, dc->categories); + dc->desc = "Chipidea USB Module"; +} + +static const TypeInfo chipidea_info = { + .name = TYPE_CHIPIDEA, + .parent = TYPE_SYS_BUS_EHCI, + .instance_size = sizeof(ChipideaState), + .instance_init = chipidea_init, + .class_init = chipidea_class_init, +}; + +static void chipidea_register_type(void) +{ + type_register_static(&chipidea_info); +} +type_init(chipidea_register_type) diff --git a/include/hw/usb/chipidea.h b/include/hw/usb/chipidea.h new file mode 100644 index 0000000000..1ec2e9dbda --- /dev/null +++ b/include/hw/usb/chipidea.h @@ -0,0 +1,16 @@ +#ifndef CHIPIDEA_H +#define CHIPIDEA_H + +#include "hw/usb/hcd-ehci.h" + +typedef struct ChipideaState { + /*< private >*/ + EHCISysBusState parent_obj; + + MemoryRegion iomem[3]; +} ChipideaState; + +#define TYPE_CHIPIDEA "usb-chipidea" +#define CHIPIDEA(obj) OBJECT_CHECK(ChipideaState, (obj), TYPE_CHIPIDEA) + +#endif /* CHIPIDEA_H */