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-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 #define TYPE_JAZZ_LED "jazz-led"
  36 #define JAZZ_LED(obj) OBJECT_CHECK(LedState, (obj), TYPE_JAZZ_LED)
  37
  38 typedef struct LedState {
  39     SysBusDevice parent_obj;
  40
  41     MemoryRegion iomem;
  42     uint8_t segments;
  43     QemuConsole *con;
  44     screen_state_t state;
  45 } LedState;
  46
  47 static uint64_t jazz_led_read(void *opaque, hwaddr addr,
  48                               unsigned int size)
  49 {
  50     LedState *s = opaque;
  51     uint8_t val;
  52
  53     val = s->segments;
  54     trace_jazz_led_read(addr, val);
  55
  56     return val;
  57 }
  58
  59 static void jazz_led_write(void *opaque, hwaddr addr,
  60                            uint64_t val, unsigned int size)
  61 {
  62     LedState *s = opaque;
  63     uint8_t new_val = val & 0xff;
  64
  65     trace_jazz_led_write(addr, new_val);
  66
  67     s->segments = new_val;
  68     s->state |= REDRAW_SEGMENTS;
  69 }
  70
  71 static const MemoryRegionOps led_ops = {
  72     .read = jazz_led_read,
  73     .write = jazz_led_write,
  74     .endianness = DEVICE_NATIVE_ENDIAN,
  75     .impl.min_access_size = 1,
  76     .impl.max_access_size = 1,
  77 };
  78
  79 /***********************************************************/
  80 /* jazz_led display */
  81
  82 static void draw_horizontal_line(DisplaySurface *ds,
  83                                  int posy, int posx1, int posx2,
  84                                  uint32_t color)
  85 {
  86     uint8_t *d;
  87     int x, bpp;
  88
  89     bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
  90     d = surface_data(ds) + surface_stride(ds) * posy + bpp * posx1;
  91     switch(bpp) {
  92         case 1:
  93             for (x = posx1; x <= posx2; x++) {
  94                 *((uint8_t *)d) = color;
  95                 d++;
  96             }
  97             break;
  98         case 2:
  99             for (x = posx1; x <= posx2; x++) {
 100                 *((uint16_t *)d) = color;
 101                 d += 2;
 102             }
 103             break;
 104         case 4:
 105             for (x = posx1; x <= posx2; x++) {
 106                 *((uint32_t *)d) = color;
 107                 d += 4;
 108             }
 109             break;
 110     }
 111 }
 112
 113 static void draw_vertical_line(DisplaySurface *ds,
 114                                int posx, int posy1, int posy2,
 115                                uint32_t color)
 116 {
 117     uint8_t *d;
 118     int y, bpp;
 119
 120     bpp = (surface_bits_per_pixel(ds) + 7) >> 3;
 121     d = surface_data(ds) + surface_stride(ds) * posy1 + bpp * posx;
 122     switch(bpp) {
 123         case 1:
 124             for (y = posy1; y <= posy2; y++) {
 125                 *((uint8_t *)d) = color;
 126                 d += surface_stride(ds);
 127             }
 128             break;
 129         case 2:
 130             for (y = posy1; y <= posy2; y++) {
 131                 *((uint16_t *)d) = color;
 132                 d += surface_stride(ds);
 133             }
 134             break;
 135         case 4:
 136             for (y = posy1; y <= posy2; y++) {
 137                 *((uint32_t *)d) = color;
 138                 d += surface_stride(ds);
 139             }
 140             break;
 141     }
 142 }
 143
 144 static void jazz_led_update_display(void *opaque)
 145 {
 146     LedState *s = opaque;
 147     DisplaySurface *surface = qemu_console_surface(s->con);
 148     uint8_t *d1;
 149     uint32_t color_segment, color_led;
 150     int y, bpp;
 151
 152     if (s->state & REDRAW_BACKGROUND) {
 153         /* clear screen */
 154         bpp = (surface_bits_per_pixel(surface) + 7) >> 3;
 155         d1 = surface_data(surface);
 156         for (y = 0; y < surface_height(surface); y++) {
 157             memset(d1, 0x00, surface_width(surface) * bpp);
 158             d1 += surface_stride(surface);
 159         }
 160     }
 161
 162     if (s->state & REDRAW_SEGMENTS) {
 163         /* set colors according to bpp */
 164         switch (surface_bits_per_pixel(surface)) {
 165             case 8:
 166                 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 167                 color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 168                 break;
 169             case 15:
 170                 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 171                 color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 172                 break;
 173             case 16:
 174                 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 175                 color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 176                 break;
 177             case 24:
 178                 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 179                 color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 180                 break;
 181             case 32:
 182                 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 183                 color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 184                 break;
 185             default:
 186                 return;
 187         }
 188
 189         /* display segments */
 190         draw_horizontal_line(surface, 40, 10, 40,
 191                              (s->segments & 0x02) ? color_segment : 0);
 192         draw_vertical_line(surface, 10, 10, 40,
 193                            (s->segments & 0x04) ? color_segment : 0);
 194         draw_vertical_line(surface, 10, 40, 70,
 195                            (s->segments & 0x08) ? color_segment : 0);
 196         draw_horizontal_line(surface, 70, 10, 40,
 197                              (s->segments & 0x10) ? color_segment : 0);
 198         draw_vertical_line(surface, 40, 40, 70,
 199                            (s->segments & 0x20) ? color_segment : 0);
 200         draw_vertical_line(surface, 40, 10, 40,
 201                            (s->segments & 0x40) ? color_segment : 0);
 202         draw_horizontal_line(surface, 10, 10, 40,
 203                              (s->segments & 0x80) ? color_segment : 0);
 204
 205         /* display led */
 206         if (!(s->segments & 0x01))
 207             color_led = 0; /* black */
 208         draw_horizontal_line(surface, 68, 50, 50, color_led);
 209         draw_horizontal_line(surface, 69, 49, 51, color_led);
 210         draw_horizontal_line(surface, 70, 48, 52, color_led);
 211         draw_horizontal_line(surface, 71, 49, 51, color_led);
 212         draw_horizontal_line(surface, 72, 50, 50, color_led);
 213     }
 214
 215     s->state = REDRAW_NONE;
 216     dpy_gfx_update(s->con, 0, 0,
 217                    surface_width(surface), surface_height(surface));
 218 }
 219
 220 static void jazz_led_invalidate_display(void *opaque)
 221 {
 222     LedState *s = opaque;
 223     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 224 }
 225
 226 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 227 {
 228     LedState *s = opaque;
 229     char buf[2];
 230
 231     dpy_text_cursor(s->con, -1, -1);
 232     qemu_console_resize(s->con, 2, 1);
 233
 234     /* TODO: draw the segments */
 235     snprintf(buf, 2, "%02hhx\n", s->segments);
 236     console_write_ch(chardata++, 0x00200100 | buf[0]);
 237     console_write_ch(chardata++, 0x00200100 | buf[1]);
 238
 239     dpy_text_update(s->con, 0, 0, 2, 1);
 240 }
 241
 242 static int jazz_led_post_load(void *opaque, int version_id)
 243 {
 244     /* force refresh */
 245     jazz_led_invalidate_display(opaque);
 246
 247     return 0;
 248 }
 249
 250 static const VMStateDescription vmstate_jazz_led = {
 251     .name = "jazz-led",
 252     .version_id = 0,
 253     .minimum_version_id = 0,
 254     .post_load = jazz_led_post_load,
 255     .fields = (VMStateField[]) {
 256         VMSTATE_UINT8(segments, LedState),
 257         VMSTATE_END_OF_LIST()
 258     }
 259 };
 260
 261 static const GraphicHwOps jazz_led_ops = {
 262     .invalidate  = jazz_led_invalidate_display,
 263     .gfx_update  = jazz_led_update_display,
 264     .text_update = jazz_led_text_update,
 265 };
 266
 267 static int jazz_led_init(SysBusDevice *dev)
 268 {
 269     LedState *s = JAZZ_LED(dev);
 270
 271     memory_region_init_io(&s->iomem, OBJECT(s), &led_ops, s, "led", 1);
 272     sysbus_init_mmio(dev, &s->iomem);
 273
 274     s->con = graphic_console_init(DEVICE(dev), 0, &jazz_led_ops, s);
 275
 276     return 0;
 277 }
 278
 279 static void jazz_led_reset(DeviceState *d)
 280 {
 281     LedState *s = JAZZ_LED(d);
 282
 283     s->segments = 0;
 284     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 285     qemu_console_resize(s->con, 60, 80);
 286 }
 287
 288 static void jazz_led_class_init(ObjectClass *klass, void *data)
 289 {
 290     DeviceClass *dc = DEVICE_CLASS(klass);
 291     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 292
 293     k->init = jazz_led_init;
 294     dc->desc = "Jazz LED display",
 295     dc->vmsd = &vmstate_jazz_led;
 296     dc->reset = jazz_led_reset;
 297 }
 298
 299 static const TypeInfo jazz_led_info = {
 300     .name          = TYPE_JAZZ_LED,
 301     .parent        = TYPE_SYS_BUS_DEVICE,
 302     .instance_size = sizeof(LedState),
 303     .class_init    = jazz_led_class_init,
 304 };
 305
 306 static void jazz_led_register(void)
 307 {
 308     type_register_static(&jazz_led_info);
 309 }
 310
 311 type_init(jazz_led_register);