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