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-rw-r--r--hw/input/milkymist-softusb.c334
1 files changed, 334 insertions, 0 deletions
diff --git a/hw/input/milkymist-softusb.c b/hw/input/milkymist-softusb.c
new file mode 100644
index 0000000000..3edab4ff0b
--- /dev/null
+++ b/hw/input/milkymist-softusb.c
@@ -0,0 +1,334 @@
+/*
+ * 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/hw.h"
+#include "hw/sysbus.h"
+#include "trace.h"
+#include "ui/console.h"
+#include "hw/input/hid.h"
+#include "qemu/error-report.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;
+
+ void *pmem_ptr;
+ void *dmem_ptr;
+
+ /* device properties */
+ uint32_t pmem_size;
+ 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, hwaddr 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, hwaddr 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);
+ memset(buf, 0, len);
+ return;
+ }
+
+ memcpy(buf, s->dmem_ptr + offset, 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;
+ }
+
+ memcpy(s->dmem_ptr + 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);
+ memset(buf, 0, len);
+ return;
+ }
+
+ memcpy(buf, s->pmem_ptr + offset, 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;
+ }
+
+ memcpy(s->pmem_ptr + 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(dev, &s->regs_region);
+
+ /* register pmem and dmem */
+ memory_region_init_ram(&s->pmem, "milkymist-softusb.pmem",
+ s->pmem_size);
+ vmstate_register_ram_global(&s->pmem);
+ s->pmem_ptr = memory_region_get_ram_ptr(&s->pmem);
+ sysbus_init_mmio(dev, &s->pmem);
+ memory_region_init_ram(&s->dmem, "milkymist-softusb.dmem",
+ s->dmem_size);
+ vmstate_register_ram_global(&s->dmem);
+ s->dmem_ptr = memory_region_get_ram_ptr(&s->dmem);
+ sysbus_init_mmio(dev, &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 Property milkymist_softusb_properties[] = {
+ DEFINE_PROP_UINT32("pmem_size", MilkymistSoftUsbState, pmem_size, 0x00001000),
+ DEFINE_PROP_UINT32("dmem_size", MilkymistSoftUsbState, dmem_size, 0x00002000),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void milkymist_softusb_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = milkymist_softusb_init;
+ dc->reset = milkymist_softusb_reset;
+ dc->vmsd = &vmstate_milkymist_softusb;
+ dc->props = milkymist_softusb_properties;
+}
+
+static const TypeInfo milkymist_softusb_info = {
+ .name = "milkymist-softusb",
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(MilkymistSoftUsbState),
+ .class_init = milkymist_softusb_class_init,
+};
+
+static void milkymist_softusb_register_types(void)
+{
+ type_register_static(&milkymist_softusb_info);
+}
+
+type_init(milkymist_softusb_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-16 01:40:01 +0000