hw/display/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/osdep.h"
  26 #include "qemu/module.h"
  27 #include "ui/console.h"
  28 #include "ui/pixel_ops.h"
  29 #include "trace.h"
  30 #include "hw/sysbus.h"
  31 #include "migration/vmstate.h"
  32 #include "qom/object.h"
  33
  34 typedef enum {
  35     REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,
  36 } screen_state_t;
  37
  38 #define TYPE_JAZZ_LED "jazz-led"
  39 OBJECT_DECLARE_SIMPLE_TYPE(LedState, JAZZ_LED)
  40
  41 struct LedState {
  42     SysBusDevice parent_obj;
  43
  44     MemoryRegion iomem;
  45     uint8_t segments;
  46     QemuConsole *con;
  47     screen_state_t state;
  48 };
  49
  50 static uint64_t jazz_led_read(void *opaque, hwaddr addr,
  51                               unsigned int size)
  52 {
  53     LedState *s = opaque;
  54     uint8_t val;
  55
  56     val = s->segments;
  57     trace_jazz_led_read(addr, val);
  58
  59     return val;
  60 }
  61
  62 static void jazz_led_write(void *opaque, hwaddr addr,
  63                            uint64_t val, unsigned int size)
  64 {
  65     LedState *s = opaque;
  66     uint8_t new_val = val & 0xff;
  67
  68     trace_jazz_led_write(addr, new_val);
  69
  70     s->segments = new_val;
  71     s->state |= REDRAW_SEGMENTS;
  72 }
  73
  74 static const MemoryRegionOps led_ops = {
  75     .read = jazz_led_read,
  76     .write = jazz_led_write,
  77     .endianness = DEVICE_NATIVE_ENDIAN,
  78     .impl.min_access_size = 1,
  79     .impl.max_access_size = 1,
  80 };
  81
  82 /***********************************************************/
  83 /* jazz_led display */
  84
  85 static void draw_horizontal_line(DisplaySurface *ds,
  86                                  int posy, int posx1, int posx2,
  87                                  uint32_t color)
  88 {
  89     uint8_t *d;
  90     int x, bpp;
  91
  92     bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
  93     d = surface_data(ds) + surface_stride(ds) * posy + bpp * posx1;
  94     switch (bpp) {
  95     case 1:
  96         for (x = posx1; x <= posx2; x++) {
  97             *((uint8_t *)d) = color;
  98             d++;
  99         }
 100         break;
 101     case 2:
 102         for (x = posx1; x <= posx2; x++) {
 103             *((uint16_t *)d) = color;
 104             d += 2;
 105         }
 106         break;
 107     case 4:
 108         for (x = posx1; x <= posx2; x++) {
 109             *((uint32_t *)d) = color;
 110             d += 4;
 111         }
 112         break;
 113     }
 114 }
 115
 116 static void draw_vertical_line(DisplaySurface *ds,
 117                                int posx, int posy1, int posy2,
 118                                uint32_t color)
 119 {
 120     uint8_t *d;
 121     int y, bpp;
 122
 123     bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
 124     d = surface_data(ds) + surface_stride(ds) * posy1 + bpp * posx;
 125     switch (bpp) {
 126     case 1:
 127         for (y = posy1; y <= posy2; y++) {
 128             *((uint8_t *)d) = color;
 129             d += surface_stride(ds);
 130         }
 131         break;
 132     case 2:
 133         for (y = posy1; y <= posy2; y++) {
 134             *((uint16_t *)d) = color;
 135             d += surface_stride(ds);
 136         }
 137         break;
 138     case 4:
 139         for (y = posy1; y <= posy2; y++) {
 140             *((uint32_t *)d) = color;
 141             d += surface_stride(ds);
 142         }
 143         break;
 144     }
 145 }
 146
 147 static void jazz_led_update_display(void *opaque)
 148 {
 149     LedState *s = opaque;
 150     DisplaySurface *surface = qemu_console_surface(s->con);
 151     uint8_t *d1;
 152     uint32_t color_segment, color_led;
 153     int y, bpp;
 154
 155     if (s->state & REDRAW_BACKGROUND) {
 156         /* clear screen */
 157         bpp = (surface_bits_per_pixel(surface) + 7) >> 3;
 158         d1 = surface_data(surface);
 159         for (y = 0; y < surface_height(surface); y++) {
 160             memset(d1, 0x00, surface_width(surface) * bpp);
 161             d1 += surface_stride(surface);
 162         }
 163     }
 164
 165     if (s->state & REDRAW_SEGMENTS) {
 166         /* set colors according to bpp */
 167         switch (surface_bits_per_pixel(surface)) {
 168         case 8:
 169             color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 170             color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 171             break;
 172         case 15:
 173             color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 174             color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 175             break;
 176         case 16:
 177             color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 178             color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 179             break;
 180         case 24:
 181             color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 182             color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 183             break;
 184         case 32:
 185             color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 186             color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 187             break;
 188         default:
 189             return;
 190         }
 191
 192         /* display segments */
 193         draw_horizontal_line(surface, 40, 10, 40,
 194                              (s->segments & 0x02) ? color_segment : 0);
 195         draw_vertical_line(surface, 10, 10, 40,
 196                            (s->segments & 0x04) ? color_segment : 0);
 197         draw_vertical_line(surface, 10, 40, 70,
 198                            (s->segments & 0x08) ? color_segment : 0);
 199         draw_horizontal_line(surface, 70, 10, 40,
 200                              (s->segments & 0x10) ? color_segment : 0);
 201         draw_vertical_line(surface, 40, 40, 70,
 202                            (s->segments & 0x20) ? color_segment : 0);
 203         draw_vertical_line(surface, 40, 10, 40,
 204                            (s->segments & 0x40) ? color_segment : 0);
 205         draw_horizontal_line(surface, 10, 10, 40,
 206                              (s->segments & 0x80) ? color_segment : 0);
 207
 208         /* display led */
 209         if (!(s->segments & 0x01)) {
 210             color_led = 0; /* black */
 211         }
 212         draw_horizontal_line(surface, 68, 50, 50, color_led);
 213         draw_horizontal_line(surface, 69, 49, 51, color_led);
 214         draw_horizontal_line(surface, 70, 48, 52, color_led);
 215         draw_horizontal_line(surface, 71, 49, 51, color_led);
 216         draw_horizontal_line(surface, 72, 50, 50, color_led);
 217     }
 218
 219     s->state = REDRAW_NONE;
 220     dpy_gfx_update_full(s->con);
 221 }
 222
 223 static void jazz_led_invalidate_display(void *opaque)
 224 {
 225     LedState *s = opaque;
 226     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 227 }
 228
 229 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 230 {
 231     LedState *s = opaque;
 232     char buf[3];
 233
 234     dpy_text_cursor(s->con, -1, -1);
 235     qemu_console_resize(s->con, 2, 1);
 236
 237     /* TODO: draw the segments */
 238     snprintf(buf, 3, "%02hhx", s->segments);
 239     console_write_ch(chardata++, ATTR2CHTYPE(buf[0], QEMU_COLOR_BLUE,
 240                                              QEMU_COLOR_BLACK, 1));
 241     console_write_ch(chardata++, ATTR2CHTYPE(buf[1], QEMU_COLOR_BLUE,
 242                                              QEMU_COLOR_BLACK, 1));
 243
 244     dpy_text_update(s->con, 0, 0, 2, 1);
 245 }
 246
 247 static int jazz_led_post_load(void *opaque, int version_id)
 248 {
 249     /* force refresh */
 250     jazz_led_invalidate_display(opaque);
 251
 252     return 0;
 253 }
 254
 255 static const VMStateDescription vmstate_jazz_led = {
 256     .name = "jazz-led",
 257     .version_id = 0,
 258     .minimum_version_id = 0,
 259     .post_load = jazz_led_post_load,
 260     .fields = (VMStateField[]) {
 261         VMSTATE_UINT8(segments, LedState),
 262         VMSTATE_END_OF_LIST()
 263     }
 264 };
 265
 266 static const GraphicHwOps jazz_led_ops = {
 267     .invalidate  = jazz_led_invalidate_display,
 268     .gfx_update  = jazz_led_update_display,
 269     .text_update = jazz_led_text_update,
 270 };
 271
 272 static void jazz_led_init(Object *obj)
 273 {
 274     LedState *s = JAZZ_LED(obj);
 275     SysBusDevice *dev = SYS_BUS_DEVICE(obj);
 276
 277     memory_region_init_io(&s->iomem, obj, &led_ops, s, "led", 1);
 278     sysbus_init_mmio(dev, &s->iomem);
 279 }
 280
 281 static void jazz_led_realize(DeviceState *dev, Error **errp)
 282 {
 283     LedState *s = JAZZ_LED(dev);
 284
 285     s->con = graphic_console_init(dev, 0, &jazz_led_ops, s);
 286 }
 287
 288 static void jazz_led_reset(DeviceState *d)
 289 {
 290     LedState *s = JAZZ_LED(d);
 291
 292     s->segments = 0;
 293     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 294     qemu_console_resize(s->con, 60, 80);
 295 }
 296
 297 static void jazz_led_class_init(ObjectClass *klass, void *data)
 298 {
 299     DeviceClass *dc = DEVICE_CLASS(klass);
 300
 301     dc->desc = "Jazz LED display",
 302     dc->vmsd = &vmstate_jazz_led;
 303     dc->reset = jazz_led_reset;
 304     dc->realize = jazz_led_realize;
 305 }
 306
 307 static const TypeInfo jazz_led_info = {
 308     .name          = TYPE_JAZZ_LED,
 309     .parent        = TYPE_SYS_BUS_DEVICE,
 310     .instance_size = sizeof(LedState),
 311     .instance_init = jazz_led_init,
 312     .class_init    = jazz_led_class_init,
 313 };
 314
 315 static void jazz_led_register(void)
 316 {
 317     type_register_static(&jazz_led_info);
 318 }
 319
 320 type_init(jazz_led_register);