X-Git-Url: http://git.maemo.org/git/?p=qemu;a=blobdiff_plain;f=hw%2Fsyborg_keyboard.c;fp=hw%2Fsyborg_keyboard.c;h=69976e4dd5cfc9f63c996fe8cde2850c2825ac9c;hp=0000000000000000000000000000000000000000;hb=a03c3bde4e288e790eccfb8cd45abd8ecbf467dc;hpb=e2ffa1bf065fa199f27d661d495573e9d6059bf1 diff --git a/hw/syborg_keyboard.c b/hw/syborg_keyboard.c new file mode 100644 index 0000000..69976e4 --- /dev/null +++ b/hw/syborg_keyboard.c @@ -0,0 +1,234 @@ +/* + * Syborg keyboard controller. + * + * Copyright (c) 2008 CodeSourcery + * + * 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. + */ + +#include "sysbus.h" +#include "console.h" +#include "syborg.h" + +//#define DEBUG_SYBORG_KEYBOARD + +#ifdef DEBUG_SYBORG_KEYBOARD +#define DPRINTF(fmt, ...) \ +do { printf("syborg_keyboard: " fmt , ##args); } while (0) +#define BADF(fmt, ...) \ +do { fprintf(stderr, "syborg_keyboard: error: " fmt , ## __VA_ARGS__); \ + exit(1);} while (0) +#else +#define DPRINTF(fmt, ...) do {} while(0) +#define BADF(fmt, ...) \ +do { fprintf(stderr, "syborg_keyboard: error: " fmt , ## __VA_ARGS__); \ +} while (0) +#endif + +enum { + KBD_ID = 0, + KBD_DATA = 1, + KBD_FIFO_COUNT = 2, + KBD_INT_ENABLE = 3, + KBD_FIFO_SIZE = 4 +}; + +typedef struct { + SysBusDevice busdev; + int int_enabled; + int extension_bit; + int fifo_size; + uint32_t *key_fifo; + int read_pos, read_count; + qemu_irq irq; +} SyborgKeyboardState; + +static void syborg_keyboard_update(SyborgKeyboardState *s) +{ + int level = s->read_count && s->int_enabled; + DPRINTF("Update IRQ %d\n", level); + qemu_set_irq(s->irq, level); +} + +static uint32_t syborg_keyboard_read(void *opaque, target_phys_addr_t offset) +{ + SyborgKeyboardState *s = (SyborgKeyboardState *)opaque; + int c; + + DPRINTF("reg read %d\n", (int)offset); + offset &= 0xfff; + switch (offset >> 2) { + case KBD_ID: + return SYBORG_ID_KEYBOARD; + case KBD_FIFO_COUNT: + return s->read_count; + case KBD_DATA: + if (s->read_count == 0) { + c = -1; + DPRINTF("FIFO underflow\n"); + } else { + c = s->key_fifo[s->read_pos]; + DPRINTF("FIFO read 0x%x\n", c); + s->read_count--; + s->read_pos++; + if (s->read_pos == s->fifo_size) + s->read_pos = 0; + } + syborg_keyboard_update(s); + return c; + case KBD_INT_ENABLE: + return s->int_enabled; + case KBD_FIFO_SIZE: + return s->fifo_size; + default: + cpu_abort(cpu_single_env, "syborg_keyboard_read: Bad offset %x\n", + (int)offset); + return 0; + } +} + +static void syborg_keyboard_write(void *opaque, target_phys_addr_t offset, + uint32_t value) +{ + SyborgKeyboardState *s = (SyborgKeyboardState *)opaque; + + DPRINTF("reg write %d\n", (int)offset); + offset &= 0xfff; + switch (offset >> 2) { + case KBD_INT_ENABLE: + s->int_enabled = value; + syborg_keyboard_update(s); + break; + default: + cpu_abort(cpu_single_env, "syborg_keyboard_write: Bad offset %x\n", + (int)offset); + } +} + +static CPUReadMemoryFunc *syborg_keyboard_readfn[] = { + syborg_keyboard_read, + syborg_keyboard_read, + syborg_keyboard_read +}; + +static CPUWriteMemoryFunc *syborg_keyboard_writefn[] = { + syborg_keyboard_write, + syborg_keyboard_write, + syborg_keyboard_write +}; + +static void syborg_keyboard_event(void *opaque, int keycode) +{ + SyborgKeyboardState *s = (SyborgKeyboardState *)opaque; + int slot; + uint32_t val; + + /* Strip off 0xe0 prefixes and reconstruct the full scancode. */ + if (keycode == 0xe0 && !s->extension_bit) { + DPRINTF("Extension bit\n"); + s->extension_bit = 0x80; + return; + } + val = (keycode & 0x7f) | s->extension_bit; + if (keycode & 0x80) + val |= 0x80000000u; + s->extension_bit = 0; + + DPRINTF("FIFO push 0x%x\n", val); + slot = s->read_pos + s->read_count; + if (slot >= s->fifo_size) + slot -= s->fifo_size; + + if (s->read_count < s->fifo_size) { + s->read_count++; + s->key_fifo[slot] = val; + } else { + fprintf(stderr, "syborg_keyboard error! FIFO overflow\n"); + } + + syborg_keyboard_update(s); +} + +static void syborg_keyboard_save(QEMUFile *f, void *opaque) +{ + SyborgKeyboardState *s = (SyborgKeyboardState *)opaque; + int i; + + qemu_put_be32(f, s->fifo_size); + qemu_put_be32(f, s->int_enabled); + qemu_put_be32(f, s->extension_bit); + qemu_put_be32(f, s->read_pos); + qemu_put_be32(f, s->read_count); + for (i = 0; i < s->fifo_size; i++) { + qemu_put_be32(f, s->key_fifo[i]); + } +} + +static int syborg_keyboard_load(QEMUFile *f, void *opaque, int version_id) +{ + SyborgKeyboardState *s = (SyborgKeyboardState *)opaque; + uint32_t val; + int i; + + if (version_id != 1) + return -EINVAL; + + val = qemu_get_be32(f); + if (val != s->fifo_size) + return -EINVAL; + + s->int_enabled = qemu_get_be32(f); + s->extension_bit = qemu_get_be32(f); + s->read_pos = qemu_get_be32(f); + s->read_count = qemu_get_be32(f); + for (i = 0; i < s->fifo_size; i++) { + s->key_fifo[i] = qemu_get_be32(f); + } + return 0; +} + +static void syborg_keyboard_init(SysBusDevice *dev) +{ + SyborgKeyboardState *s = FROM_SYSBUS(SyborgKeyboardState, dev); + int iomemtype; + + sysbus_init_irq(dev, &s->irq); + iomemtype = cpu_register_io_memory(0, syborg_keyboard_readfn, + syborg_keyboard_writefn, s); + sysbus_init_mmio(dev, 0x1000, iomemtype); + s->fifo_size = qdev_get_prop_int(&dev->qdev, "fifo-size", 16); + if (s->fifo_size <= 0) { + fprintf(stderr, "syborg_keyboard: fifo too small\n"); + s->fifo_size = 16; + } + s->key_fifo = qemu_mallocz(s->fifo_size * sizeof(s->key_fifo[0])); + + qemu_add_kbd_event_handler(syborg_keyboard_event, s); + + register_savevm("syborg_keyboard", -1, 1, + syborg_keyboard_save, syborg_keyboard_load, s); +} + +static void syborg_keyboard_register_devices(void) +{ + sysbus_register_dev("syborg,keyboard", sizeof(SyborgKeyboardState), + syborg_keyboard_init); +} + +device_init(syborg_keyboard_register_devices)