hw/jazz_led.c

   1 /*
   2  * QEMU JAZZ LED emulator.
   3  *
   4  * Copyright (c) 2007-2012 Herve Poussineau
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu-common.h"
  26 #include "ui/console.h"
  27 #include "ui/pixel_ops.h"
  28 #include "trace.h"
  29 #include "hw/sysbus.h"
  30
  31 typedef enum {
  32     REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,
  33 } screen_state_t;
  34
  35 typedef struct LedState {
  36     SysBusDevice busdev;
  37     MemoryRegion iomem;
  38     uint8_t segments;
  39     QemuConsole *con;
  40     screen_state_t state;
  41 } LedState;
  42
  43 static uint64_t jazz_led_read(void *opaque, hwaddr addr,
  44                               unsigned int size)
  45 {
  46     LedState *s = opaque;
  47     uint8_t val;
  48
  49     val = s->segments;
  50     trace_jazz_led_read(addr, val);
  51
  52     return val;
  53 }
  54
  55 static void jazz_led_write(void *opaque, hwaddr addr,
  56                            uint64_t val, unsigned int size)
  57 {
  58     LedState *s = opaque;
  59     uint8_t new_val = val & 0xff;
  60
  61     trace_jazz_led_write(addr, new_val);
  62
  63     s->segments = new_val;
  64     s->state |= REDRAW_SEGMENTS;
  65 }
  66
  67 static const MemoryRegionOps led_ops = {
  68     .read = jazz_led_read,
  69     .write = jazz_led_write,
  70     .endianness = DEVICE_NATIVE_ENDIAN,
  71     .impl.min_access_size = 1,
  72     .impl.max_access_size = 1,
  73 };
  74
  75 /***********************************************************/
  76 /* jazz_led display */
  77
  78 static void draw_horizontal_line(DisplaySurface *ds,
  79                                  int posy, int posx1, int posx2,
  80                                  uint32_t color)
  81 {
  82     uint8_t *d;
  83     int x, bpp;
  84
  85     bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
  86     d = surface_data(ds) + surface_stride(ds) * posy + bpp * posx1;
  87     switch(bpp) {
  88         case 1:
  89             for (x = posx1; x <= posx2; x++) {
  90                 *((uint8_t *)d) = color;
  91                 d++;
  92             }
  93             break;
  94         case 2:
  95             for (x = posx1; x <= posx2; x++) {
  96                 *((uint16_t *)d) = color;
  97                 d += 2;
  98             }
  99             break;
 100         case 4:
 101             for (x = posx1; x <= posx2; x++) {
 102                 *((uint32_t *)d) = color;
 103                 d += 4;
 104             }
 105             break;
 106     }
 107 }
 108
 109 static void draw_vertical_line(DisplaySurface *ds,
 110                                int posx, int posy1, int posy2,
 111                                uint32_t color)
 112 {
 113     uint8_t *d;
 114     int y, bpp;
 115
 116     bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
 117     d = surface_data(ds) + surface_stride(ds) * posy1 + bpp * posx;
 118     switch(bpp) {
 119         case 1:
 120             for (y = posy1; y <= posy2; y++) {
 121                 *((uint8_t *)d) = color;
 122                 d += surface_stride(ds);
 123             }
 124             break;
 125         case 2:
 126             for (y = posy1; y <= posy2; y++) {
 127                 *((uint16_t *)d) = color;
 128                 d += surface_stride(ds);
 129             }
 130             break;
 131         case 4:
 132             for (y = posy1; y <= posy2; y++) {
 133                 *((uint32_t *)d) = color;
 134                 d += surface_stride(ds);
 135             }
 136             break;
 137     }
 138 }
 139
 140 static void jazz_led_update_display(void *opaque)
 141 {
 142     LedState *s = opaque;
 143     DisplaySurface *surface = qemu_console_surface(s->con);
 144     uint8_t *d1;
 145     uint32_t color_segment, color_led;
 146     int y, bpp;
 147
 148     if (s->state & REDRAW_BACKGROUND) {
 149         /* clear screen */
 150         bpp = (surface_bits_per_pixel(surface) + 7) >> 3;
 151         d1 = surface_data(surface);
 152         for (y = 0; y < surface_height(surface); y++) {
 153             memset(d1, 0x00, surface_width(surface) * bpp);
 154             d1 += surface_stride(surface);
 155         }
 156     }
 157
 158     if (s->state & REDRAW_SEGMENTS) {
 159         /* set colors according to bpp */
 160         switch (surface_bits_per_pixel(surface)) {
 161             case 8:
 162                 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 163                 color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 164                 break;
 165             case 15:
 166                 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 167                 color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 168                 break;
 169             case 16:
 170                 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 171                 color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 172             case 24:
 173                 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 174                 color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 175                 break;
 176             case 32:
 177                 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 178                 color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 179                 break;
 180             default:
 181                 return;
 182         }
 183
 184         /* display segments */
 185         draw_horizontal_line(surface, 40, 10, 40,
 186                              (s->segments & 0x02) ? color_segment : 0);
 187         draw_vertical_line(surface, 10, 10, 40,
 188                            (s->segments & 0x04) ? color_segment : 0);
 189         draw_vertical_line(surface, 10, 40, 70,
 190                            (s->segments & 0x08) ? color_segment : 0);
 191         draw_horizontal_line(surface, 70, 10, 40,
 192                              (s->segments & 0x10) ? color_segment : 0);
 193         draw_vertical_line(surface, 40, 40, 70,
 194                            (s->segments & 0x20) ? color_segment : 0);
 195         draw_vertical_line(surface, 40, 10, 40,
 196                            (s->segments & 0x40) ? color_segment : 0);
 197         draw_horizontal_line(surface, 10, 10, 40,
 198                              (s->segments & 0x80) ? color_segment : 0);
 199
 200         /* display led */
 201         if (!(s->segments & 0x01))
 202             color_led = 0; /* black */
 203         draw_horizontal_line(surface, 68, 50, 50, color_led);
 204         draw_horizontal_line(surface, 69, 49, 51, color_led);
 205         draw_horizontal_line(surface, 70, 48, 52, color_led);
 206         draw_horizontal_line(surface, 71, 49, 51, color_led);
 207         draw_horizontal_line(surface, 72, 50, 50, color_led);
 208     }
 209
 210     s->state = REDRAW_NONE;
 211     dpy_gfx_update(s->con, 0, 0,
 212                    surface_width(surface), surface_height(surface));
 213 }
 214
 215 static void jazz_led_invalidate_display(void *opaque)
 216 {
 217     LedState *s = opaque;
 218     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 219 }
 220
 221 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 222 {
 223     LedState *s = opaque;
 224     char buf[2];
 225
 226     dpy_text_cursor(s->con, -1, -1);
 227     qemu_console_resize(s->con, 2, 1);
 228
 229     /* TODO: draw the segments */
 230     snprintf(buf, 2, "%02hhx\n", s->segments);
 231     console_write_ch(chardata++, 0x00200100 | buf[0]);
 232     console_write_ch(chardata++, 0x00200100 | buf[1]);
 233
 234     dpy_text_update(s->con, 0, 0, 2, 1);
 235 }
 236
 237 static int jazz_led_post_load(void *opaque, int version_id)
 238 {
 239     /* force refresh */
 240     jazz_led_invalidate_display(opaque);
 241
 242     return 0;
 243 }
 244
 245 static const VMStateDescription vmstate_jazz_led = {
 246     .name = "jazz-led",
 247     .version_id = 0,
 248     .minimum_version_id = 0,
 249     .minimum_version_id_old = 0,
 250     .post_load = jazz_led_post_load,
 251     .fields = (VMStateField[]) {
 252         VMSTATE_UINT8(segments, LedState),
 253         VMSTATE_END_OF_LIST()
 254     }
 255 };
 256
 257 static int jazz_led_init(SysBusDevice *dev)
 258 {
 259     LedState *s = FROM_SYSBUS(LedState, dev);
 260
 261     memory_region_init_io(&s->iomem, &led_ops, s, "led", 1);
 262     sysbus_init_mmio(dev, &s->iomem);
 263
 264     s->con = graphic_console_init(jazz_led_update_display,
 265                                   jazz_led_invalidate_display,
 266                                   NULL,
 267                                   jazz_led_text_update, s);
 268
 269     return 0;
 270 }
 271
 272 static void jazz_led_reset(DeviceState *d)
 273 {
 274     LedState *s = DO_UPCAST(LedState, busdev.qdev, d);
 275
 276     s->segments = 0;
 277     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 278     qemu_console_resize(s->con, 60, 80);
 279 }
 280
 281 static void jazz_led_class_init(ObjectClass *klass, void *data)
 282 {
 283     DeviceClass *dc = DEVICE_CLASS(klass);
 284     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 285
 286     k->init = jazz_led_init;
 287     dc->desc = "Jazz LED display",
 288     dc->vmsd = &vmstate_jazz_led;
 289     dc->reset = jazz_led_reset;
 290 }
 291
 292 static const TypeInfo jazz_led_info = {
 293     .name          = "jazz-led",
 294     .parent        = TYPE_SYS_BUS_DEVICE,
 295     .instance_size = sizeof(LedState),
 296     .class_init    = jazz_led_class_init,
 297 };
 298
 299 static void jazz_led_register(void)
 300 {
 301     type_register_static(&jazz_led_info);
 302 }
 303
 304 type_init(jazz_led_register);