/* * QEMU model of the Milkymist SoftUSB block. * * Copyright (c) 2010 Michael Walle <michael@walle.cc> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. * * * Specification available at: * not available yet */ #include "hw.h" #include "sysbus.h" #include "trace.h" #include "console.h" #include "hid.h" #include "qemu-error.h" enum { R_CTRL = 0, R_MAX }; enum { CTRL_RESET = (1<<0), }; #define COMLOC_DEBUG_PRODUCE 0x1000 #define COMLOC_DEBUG_BASE 0x1001 #define COMLOC_MEVT_PRODUCE 0x1101 #define COMLOC_MEVT_BASE 0x1102 #define COMLOC_KEVT_PRODUCE 0x1142 #define COMLOC_KEVT_BASE 0x1143 struct MilkymistSoftUsbState { SysBusDevice busdev; HIDState hid_kbd; HIDState hid_mouse; MemoryRegion regs_region; MemoryRegion pmem; MemoryRegion dmem; qemu_irq irq; /* device properties */ uint32_t pmem_base; uint32_t pmem_size; uint32_t dmem_base; uint32_t dmem_size; /* device registers */ uint32_t regs[R_MAX]; /* mouse state */ uint8_t mouse_hid_buffer[4]; /* keyboard state */ uint8_t kbd_hid_buffer[8]; }; typedef struct MilkymistSoftUsbState MilkymistSoftUsbState; static uint64_t softusb_read(void *opaque, target_phys_addr_t addr, unsigned size) { MilkymistSoftUsbState *s = opaque; uint32_t r = 0; addr >>= 2; switch (addr) { case R_CTRL: r = s->regs[addr]; break; default: error_report("milkymist_softusb: read access to unknown register 0x" TARGET_FMT_plx, addr << 2); break; } trace_milkymist_softusb_memory_read(addr << 2, r); return r; } static void softusb_write(void *opaque, target_phys_addr_t addr, uint64_t value, unsigned size) { MilkymistSoftUsbState *s = opaque; trace_milkymist_softusb_memory_write(addr, value); addr >>= 2; switch (addr) { case R_CTRL: s->regs[addr] = value; break; default: error_report("milkymist_softusb: write access to unknown register 0x" TARGET_FMT_plx, addr << 2); break; } } static const MemoryRegionOps softusb_mmio_ops = { .read = softusb_read, .write = softusb_write, .endianness = DEVICE_NATIVE_ENDIAN, .valid = { .min_access_size = 4, .max_access_size = 4, }, }; static inline void softusb_read_dmem(MilkymistSoftUsbState *s, uint32_t offset, uint8_t *buf, uint32_t len) { if (offset + len >= s->dmem_size) { error_report("milkymist_softusb: read dmem out of bounds " "at offset 0x%x, len %d", offset, len); return; } cpu_physical_memory_read(s->dmem_base + offset, buf, len); } static inline void softusb_write_dmem(MilkymistSoftUsbState *s, uint32_t offset, uint8_t *buf, uint32_t len) { if (offset + len >= s->dmem_size) { error_report("milkymist_softusb: write dmem out of bounds " "at offset 0x%x, len %d", offset, len); return; } cpu_physical_memory_write(s->dmem_base + offset, buf, len); } static inline void softusb_read_pmem(MilkymistSoftUsbState *s, uint32_t offset, uint8_t *buf, uint32_t len) { if (offset + len >= s->pmem_size) { error_report("milkymist_softusb: read pmem out of bounds " "at offset 0x%x, len %d", offset, len); return; } cpu_physical_memory_read(s->pmem_base + offset, buf, len); } static inline void softusb_write_pmem(MilkymistSoftUsbState *s, uint32_t offset, uint8_t *buf, uint32_t len) { if (offset + len >= s->pmem_size) { error_report("milkymist_softusb: write pmem out of bounds " "at offset 0x%x, len %d", offset, len); return; } cpu_physical_memory_write(s->pmem_base + offset, buf, len); } static void softusb_mouse_changed(MilkymistSoftUsbState *s) { uint8_t m; softusb_read_dmem(s, COMLOC_MEVT_PRODUCE, &m, 1); trace_milkymist_softusb_mevt(m); softusb_write_dmem(s, COMLOC_MEVT_BASE + 4 * m, s->mouse_hid_buffer, 4); m = (m + 1) & 0xf; softusb_write_dmem(s, COMLOC_MEVT_PRODUCE, &m, 1); trace_milkymist_softusb_pulse_irq(); qemu_irq_pulse(s->irq); } static void softusb_kbd_changed(MilkymistSoftUsbState *s) { uint8_t m; softusb_read_dmem(s, COMLOC_KEVT_PRODUCE, &m, 1); trace_milkymist_softusb_kevt(m); softusb_write_dmem(s, COMLOC_KEVT_BASE + 8 * m, s->kbd_hid_buffer, 8); m = (m + 1) & 0x7; softusb_write_dmem(s, COMLOC_KEVT_PRODUCE, &m, 1); trace_milkymist_softusb_pulse_irq(); qemu_irq_pulse(s->irq); } static void softusb_kbd_hid_datain(HIDState *hs) { MilkymistSoftUsbState *s = container_of(hs, MilkymistSoftUsbState, hid_kbd); int len; /* if device is in reset, do nothing */ if (s->regs[R_CTRL] & CTRL_RESET) { return; } len = hid_keyboard_poll(hs, s->kbd_hid_buffer, sizeof(s->kbd_hid_buffer)); if (len == 8) { softusb_kbd_changed(s); } } static void softusb_mouse_hid_datain(HIDState *hs) { MilkymistSoftUsbState *s = container_of(hs, MilkymistSoftUsbState, hid_mouse); int len; /* if device is in reset, do nothing */ if (s->regs[R_CTRL] & CTRL_RESET) { return; } len = hid_pointer_poll(hs, s->mouse_hid_buffer, sizeof(s->mouse_hid_buffer)); if (len == 4) { softusb_mouse_changed(s); } } static void milkymist_softusb_reset(DeviceState *d) { MilkymistSoftUsbState *s = container_of(d, MilkymistSoftUsbState, busdev.qdev); int i; for (i = 0; i < R_MAX; i++) { s->regs[i] = 0; } memset(s->kbd_hid_buffer, 0, sizeof(s->kbd_hid_buffer)); memset(s->mouse_hid_buffer, 0, sizeof(s->mouse_hid_buffer)); hid_reset(&s->hid_kbd); hid_reset(&s->hid_mouse); /* defaults */ s->regs[R_CTRL] = CTRL_RESET; } static int milkymist_softusb_init(SysBusDevice *dev) { MilkymistSoftUsbState *s = FROM_SYSBUS(typeof(*s), dev); sysbus_init_irq(dev, &s->irq); memory_region_init_io(&s->regs_region, &softusb_mmio_ops, s, "milkymist-softusb", R_MAX * 4); sysbus_init_mmio_region(dev, &s->regs_region); /* register pmem and dmem */ memory_region_init_ram(&s->pmem, NULL, "milkymist-softusb.pmem", s->pmem_size); sysbus_add_memory(dev, s->pmem_base, &s->pmem); memory_region_init_ram(&s->dmem, NULL, "milkymist-softusb.dmem", s->dmem_size); sysbus_add_memory(dev, s->dmem_base, &s->dmem); hid_init(&s->hid_kbd, HID_KEYBOARD, softusb_kbd_hid_datain); hid_init(&s->hid_mouse, HID_MOUSE, softusb_mouse_hid_datain); return 0; } static const VMStateDescription vmstate_milkymist_softusb = { .name = "milkymist-softusb", .version_id = 1, .minimum_version_id = 1, .minimum_version_id_old = 1, .fields = (VMStateField[]) { VMSTATE_UINT32_ARRAY(regs, MilkymistSoftUsbState, R_MAX), VMSTATE_HID_KEYBOARD_DEVICE(hid_kbd, MilkymistSoftUsbState), VMSTATE_HID_POINTER_DEVICE(hid_mouse, MilkymistSoftUsbState), VMSTATE_BUFFER(kbd_hid_buffer, MilkymistSoftUsbState), VMSTATE_BUFFER(mouse_hid_buffer, MilkymistSoftUsbState), VMSTATE_END_OF_LIST() } }; static SysBusDeviceInfo milkymist_softusb_info = { .init = milkymist_softusb_init, .qdev.name = "milkymist-softusb", .qdev.size = sizeof(MilkymistSoftUsbState), .qdev.vmsd = &vmstate_milkymist_softusb, .qdev.reset = milkymist_softusb_reset, .qdev.props = (Property[]) { DEFINE_PROP_UINT32( "pmem_base", MilkymistSoftUsbState, pmem_base, 0xa0000000 ), DEFINE_PROP_UINT32( "pmem_size", MilkymistSoftUsbState, pmem_size, 0x00001000 ), DEFINE_PROP_UINT32( "dmem_base", MilkymistSoftUsbState, dmem_base, 0xa0020000 ), DEFINE_PROP_UINT32( "dmem_size", MilkymistSoftUsbState, dmem_size, 0x00002000 ), DEFINE_PROP_END_OF_LIST(), } }; static void milkymist_softusb_register(void) { sysbus_register_withprop(&milkymist_softusb_info); } device_init(milkymist_softusb_register)