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 typedef struct LedState LedState;
  40 DECLARE_INSTANCE_CHECKER(LedState, JAZZ_LED,
  41                          TYPE_JAZZ_LED)
  42
  43 struct LedState {
  44     SysBusDevice parent_obj;
  45
  46     MemoryRegion iomem;
  47     uint8_t segments;
  48     QemuConsole *con;
  49     screen_state_t state;
  50 };
  51
  52 static uint64_t jazz_led_read(void *opaque, hwaddr addr,
  53                               unsigned int size)
  54 {
  55     LedState *s = opaque;
  56     uint8_t val;
  57
  58     val = s->segments;
  59     trace_jazz_led_read(addr, val);
  60
  61     return val;
  62 }
  63
  64 static void jazz_led_write(void *opaque, hwaddr addr,
  65                            uint64_t val, unsigned int size)
  66 {
  67     LedState *s = opaque;
  68     uint8_t new_val = val & 0xff;
  69
  70     trace_jazz_led_write(addr, new_val);
  71
  72     s->segments = new_val;
  73     s->state |= REDRAW_SEGMENTS;
  74 }
  75
  76 static const MemoryRegionOps led_ops = {
  77     .read = jazz_led_read,
  78     .write = jazz_led_write,
  79     .endianness = DEVICE_NATIVE_ENDIAN,
  80     .impl.min_access_size = 1,
  81     .impl.max_access_size = 1,
  82 };
  83
  84 /***********************************************************/
  85 /* jazz_led display */
  86
  87 static void draw_horizontal_line(DisplaySurface *ds,
  88                                  int posy, int posx1, int posx2,
  89                                  uint32_t color)
  90 {
  91     uint8_t *d;
  92     int x, bpp;
  93
  94     bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
  95     d = surface_data(ds) + surface_stride(ds) * posy + bpp * posx1;
  96     switch (bpp) {
  97     case 1:
  98         for (x = posx1; x <= posx2; x++) {
  99             *((uint8_t *)d) = color;
 100             d++;
 101         }
 102         break;
 103     case 2:
 104         for (x = posx1; x <= posx2; x++) {
 105             *((uint16_t *)d) = color;
 106             d += 2;
 107         }
 108         break;
 109     case 4:
 110         for (x = posx1; x <= posx2; x++) {
 111             *((uint32_t *)d) = color;
 112             d += 4;
 113         }
 114         break;
 115     }
 116 }
 117
 118 static void draw_vertical_line(DisplaySurface *ds,
 119                                int posx, int posy1, int posy2,
 120                                uint32_t color)
 121 {
 122     uint8_t *d;
 123     int y, bpp;
 124
 125     bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
 126     d = surface_data(ds) + surface_stride(ds) * posy1 + bpp * posx;
 127     switch (bpp) {
 128     case 1:
 129         for (y = posy1; y <= posy2; y++) {
 130             *((uint8_t *)d) = color;
 131             d += surface_stride(ds);
 132         }
 133         break;
 134     case 2:
 135         for (y = posy1; y <= posy2; y++) {
 136             *((uint16_t *)d) = color;
 137             d += surface_stride(ds);
 138         }
 139         break;
 140     case 4:
 141         for (y = posy1; y <= posy2; y++) {
 142             *((uint32_t *)d) = color;
 143             d += surface_stride(ds);
 144         }
 145         break;
 146     }
 147 }
 148
 149 static void jazz_led_update_display(void *opaque)
 150 {
 151     LedState *s = opaque;
 152     DisplaySurface *surface = qemu_console_surface(s->con);
 153     uint8_t *d1;
 154     uint32_t color_segment, color_led;
 155     int y, bpp;
 156
 157     if (s->state & REDRAW_BACKGROUND) {
 158         /* clear screen */
 159         bpp = (surface_bits_per_pixel(surface) + 7) >> 3;
 160         d1 = surface_data(surface);
 161         for (y = 0; y < surface_height(surface); y++) {
 162             memset(d1, 0x00, surface_width(surface) * bpp);
 163             d1 += surface_stride(surface);
 164         }
 165     }
 166
 167     if (s->state & REDRAW_SEGMENTS) {
 168         /* set colors according to bpp */
 169         switch (surface_bits_per_pixel(surface)) {
 170         case 8:
 171             color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 172             color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 173             break;
 174         case 15:
 175             color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 176             color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 177             break;
 178         case 16:
 179             color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 180             color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 181             break;
 182         case 24:
 183             color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 184             color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 185             break;
 186         case 32:
 187             color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 188             color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 189             break;
 190         default:
 191             return;
 192         }
 193
 194         /* display segments */
 195         draw_horizontal_line(surface, 40, 10, 40,
 196                              (s->segments & 0x02) ? color_segment : 0);
 197         draw_vertical_line(surface, 10, 10, 40,
 198                            (s->segments & 0x04) ? color_segment : 0);
 199         draw_vertical_line(surface, 10, 40, 70,
 200                            (s->segments & 0x08) ? color_segment : 0);
 201         draw_horizontal_line(surface, 70, 10, 40,
 202                              (s->segments & 0x10) ? color_segment : 0);
 203         draw_vertical_line(surface, 40, 40, 70,
 204                            (s->segments & 0x20) ? color_segment : 0);
 205         draw_vertical_line(surface, 40, 10, 40,
 206                            (s->segments & 0x40) ? color_segment : 0);
 207         draw_horizontal_line(surface, 10, 10, 40,
 208                              (s->segments & 0x80) ? color_segment : 0);
 209
 210         /* display led */
 211         if (!(s->segments & 0x01)) {
 212             color_led = 0; /* black */
 213         }
 214         draw_horizontal_line(surface, 68, 50, 50, color_led);
 215         draw_horizontal_line(surface, 69, 49, 51, color_led);
 216         draw_horizontal_line(surface, 70, 48, 52, color_led);
 217         draw_horizontal_line(surface, 71, 49, 51, color_led);
 218         draw_horizontal_line(surface, 72, 50, 50, color_led);
 219     }
 220
 221     s->state = REDRAW_NONE;
 222     dpy_gfx_update_full(s->con);
 223 }
 224
 225 static void jazz_led_invalidate_display(void *opaque)
 226 {
 227     LedState *s = opaque;
 228     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 229 }
 230
 231 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 232 {
 233     LedState *s = opaque;
 234     char buf[3];
 235
 236     dpy_text_cursor(s->con, -1, -1);
 237     qemu_console_resize(s->con, 2, 1);
 238
 239     /* TODO: draw the segments */
 240     snprintf(buf, 3, "%02hhx", s->segments);
 241     console_write_ch(chardata++, ATTR2CHTYPE(buf[0], QEMU_COLOR_BLUE,
 242                                              QEMU_COLOR_BLACK, 1));
 243     console_write_ch(chardata++, ATTR2CHTYPE(buf[1], QEMU_COLOR_BLUE,
 244                                              QEMU_COLOR_BLACK, 1));
 245
 246     dpy_text_update(s->con, 0, 0, 2, 1);
 247 }
 248
 249 static int jazz_led_post_load(void *opaque, int version_id)
 250 {
 251     /* force refresh */
 252     jazz_led_invalidate_display(opaque);
 253
 254     return 0;
 255 }
 256
 257 static const VMStateDescription vmstate_jazz_led = {
 258     .name = "jazz-led",
 259     .version_id = 0,
 260     .minimum_version_id = 0,
 261     .post_load = jazz_led_post_load,
 262     .fields = (VMStateField[]) {
 263         VMSTATE_UINT8(segments, LedState),
 264         VMSTATE_END_OF_LIST()
 265     }
 266 };
 267
 268 static const GraphicHwOps jazz_led_ops = {
 269     .invalidate  = jazz_led_invalidate_display,
 270     .gfx_update  = jazz_led_update_display,
 271     .text_update = jazz_led_text_update,
 272 };
 273
 274 static void jazz_led_init(Object *obj)
 275 {
 276     LedState *s = JAZZ_LED(obj);
 277     SysBusDevice *dev = SYS_BUS_DEVICE(obj);
 278
 279     memory_region_init_io(&s->iomem, obj, &led_ops, s, "led", 1);
 280     sysbus_init_mmio(dev, &s->iomem);
 281 }
 282
 283 static void jazz_led_realize(DeviceState *dev, Error **errp)
 284 {
 285     LedState *s = JAZZ_LED(dev);
 286
 287     s->con = graphic_console_init(dev, 0, &jazz_led_ops, s);
 288 }
 289
 290 static void jazz_led_reset(DeviceState *d)
 291 {
 292     LedState *s = JAZZ_LED(d);
 293
 294     s->segments = 0;
 295     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 296     qemu_console_resize(s->con, 60, 80);
 297 }
 298
 299 static void jazz_led_class_init(ObjectClass *klass, void *data)
 300 {
 301     DeviceClass *dc = DEVICE_CLASS(klass);
 302
 303     dc->desc = "Jazz LED display",
 304     dc->vmsd = &vmstate_jazz_led;
 305     dc->reset = jazz_led_reset;
 306     dc->realize = jazz_led_realize;
 307 }
 308
 309 static const TypeInfo jazz_led_info = {
 310     .name          = TYPE_JAZZ_LED,
 311     .parent        = TYPE_SYS_BUS_DEVICE,
 312     .instance_size = sizeof(LedState),
 313     .instance_init = jazz_led_init,
 314     .class_init    = jazz_led_class_init,
 315 };
 316
 317 static void jazz_led_register(void)
 318 {
 319     type_register_static(&jazz_led_info);
 320 }
 321
 322 type_init(jazz_led_register);