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 "console.h"
  27 #include "pixel_ops.h"
  28 #include "trace.h"
  29 #include "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     DisplayState *ds;
  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(DisplayState *ds, int posy, int posx1, int posx2, uint32_t color)
  79 {
  80     uint8_t *d;
  81     int x, bpp;
  82
  83     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
  84     d = ds_get_data(ds) + ds_get_linesize(ds) * posy + bpp * posx1;
  85     switch(bpp) {
  86         case 1:
  87             for (x = posx1; x <= posx2; x++) {
  88                 *((uint8_t *)d) = color;
  89                 d++;
  90             }
  91             break;
  92         case 2:
  93             for (x = posx1; x <= posx2; x++) {
  94                 *((uint16_t *)d) = color;
  95                 d += 2;
  96             }
  97             break;
  98         case 4:
  99             for (x = posx1; x <= posx2; x++) {
 100                 *((uint32_t *)d) = color;
 101                 d += 4;
 102             }
 103             break;
 104     }
 105 }
 106
 107 static void draw_vertical_line(DisplayState *ds, int posx, int posy1, int posy2, uint32_t color)
 108 {
 109     uint8_t *d;
 110     int y, bpp;
 111
 112     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 113     d = ds_get_data(ds) + ds_get_linesize(ds) * posy1 + bpp * posx;
 114     switch(bpp) {
 115         case 1:
 116             for (y = posy1; y <= posy2; y++) {
 117                 *((uint8_t *)d) = color;
 118                 d += ds_get_linesize(ds);
 119             }
 120             break;
 121         case 2:
 122             for (y = posy1; y <= posy2; y++) {
 123                 *((uint16_t *)d) = color;
 124                 d += ds_get_linesize(ds);
 125             }
 126             break;
 127         case 4:
 128             for (y = posy1; y <= posy2; y++) {
 129                 *((uint32_t *)d) = color;
 130                 d += ds_get_linesize(ds);
 131             }
 132             break;
 133     }
 134 }
 135
 136 static void jazz_led_update_display(void *opaque)
 137 {
 138     LedState *s = opaque;
 139     DisplayState *ds = s->ds;
 140     uint8_t *d1;
 141     uint32_t color_segment, color_led;
 142     int y, bpp;
 143
 144     if (s->state & REDRAW_BACKGROUND) {
 145         /* clear screen */
 146         bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 147         d1 = ds_get_data(ds);
 148         for (y = 0; y < ds_get_height(ds); y++) {
 149             memset(d1, 0x00, ds_get_width(ds) * bpp);
 150             d1 += ds_get_linesize(ds);
 151         }
 152     }
 153
 154     if (s->state & REDRAW_SEGMENTS) {
 155         /* set colors according to bpp */
 156         switch (ds_get_bits_per_pixel(ds)) {
 157             case 8:
 158                 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 159                 color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 160                 break;
 161             case 15:
 162                 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 163                 color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 164                 break;
 165             case 16:
 166                 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 167                 color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 168             case 24:
 169                 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 170                 color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 171                 break;
 172             case 32:
 173                 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 174                 color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 175                 break;
 176             default:
 177                 return;
 178         }
 179
 180         /* display segments */
 181         draw_horizontal_line(ds, 40, 10, 40, (s->segments & 0x02) ? color_segment : 0);
 182         draw_vertical_line(ds, 10, 10, 40, (s->segments & 0x04) ? color_segment : 0);
 183         draw_vertical_line(ds, 10, 40, 70, (s->segments & 0x08) ? color_segment : 0);
 184         draw_horizontal_line(ds, 70, 10, 40, (s->segments & 0x10) ? color_segment : 0);
 185         draw_vertical_line(ds, 40, 40, 70, (s->segments & 0x20) ? color_segment : 0);
 186         draw_vertical_line(ds, 40, 10, 40, (s->segments & 0x40) ? color_segment : 0);
 187         draw_horizontal_line(ds, 10, 10, 40, (s->segments & 0x80) ? color_segment : 0);
 188
 189         /* display led */
 190         if (!(s->segments & 0x01))
 191             color_led = 0; /* black */
 192         draw_horizontal_line(ds, 68, 50, 50, color_led);
 193         draw_horizontal_line(ds, 69, 49, 51, color_led);
 194         draw_horizontal_line(ds, 70, 48, 52, color_led);
 195         draw_horizontal_line(ds, 71, 49, 51, color_led);
 196         draw_horizontal_line(ds, 72, 50, 50, color_led);
 197     }
 198
 199     s->state = REDRAW_NONE;
 200     dpy_gfx_update(ds, 0, 0, ds_get_width(ds), ds_get_height(ds));
 201 }
 202
 203 static void jazz_led_invalidate_display(void *opaque)
 204 {
 205     LedState *s = opaque;
 206     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 207 }
 208
 209 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 210 {
 211     LedState *s = opaque;
 212     char buf[2];
 213
 214     dpy_text_cursor(s->ds, -1, -1);
 215     qemu_console_resize(s->ds, 2, 1);
 216
 217     /* TODO: draw the segments */
 218     snprintf(buf, 2, "%02hhx\n", s->segments);
 219     console_write_ch(chardata++, 0x00200100 | buf[0]);
 220     console_write_ch(chardata++, 0x00200100 | buf[1]);
 221
 222     dpy_text_update(s->ds, 0, 0, 2, 1);
 223 }
 224
 225 static int jazz_led_post_load(void *opaque, int version_id)
 226 {
 227     /* force refresh */
 228     jazz_led_invalidate_display(opaque);
 229
 230     return 0;
 231 }
 232
 233 static const VMStateDescription vmstate_jazz_led = {
 234     .name = "jazz-led",
 235     .version_id = 0,
 236     .minimum_version_id = 0,
 237     .minimum_version_id_old = 0,
 238     .post_load = jazz_led_post_load,
 239     .fields = (VMStateField[]) {
 240         VMSTATE_UINT8(segments, LedState),
 241         VMSTATE_END_OF_LIST()
 242     }
 243 };
 244
 245 static int jazz_led_init(SysBusDevice *dev)
 246 {
 247     LedState *s = FROM_SYSBUS(LedState, dev);
 248
 249     memory_region_init_io(&s->iomem, &led_ops, s, "led", 1);
 250     sysbus_init_mmio(dev, &s->iomem);
 251
 252     s->ds = graphic_console_init(jazz_led_update_display,
 253                                  jazz_led_invalidate_display,
 254                                  NULL,
 255                                  jazz_led_text_update, s);
 256
 257     return 0;
 258 }
 259
 260 static void jazz_led_reset(DeviceState *d)
 261 {
 262     LedState *s = DO_UPCAST(LedState, busdev.qdev, d);
 263
 264     s->segments = 0;
 265     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 266     qemu_console_resize(s->ds, 60, 80);
 267 }
 268
 269 static void jazz_led_class_init(ObjectClass *klass, void *data)
 270 {
 271     DeviceClass *dc = DEVICE_CLASS(klass);
 272     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 273
 274     k->init = jazz_led_init;
 275     dc->desc = "Jazz LED display",
 276     dc->vmsd = &vmstate_jazz_led;
 277     dc->reset = jazz_led_reset;
 278 }
 279
 280 static TypeInfo jazz_led_info = {
 281     .name          = "jazz-led",
 282     .parent        = TYPE_SYS_BUS_DEVICE,
 283     .instance_size = sizeof(LedState),
 284     .class_init    = jazz_led_class_init,
 285 };
 286
 287 static void jazz_led_register(void)
 288 {
 289     type_register_static(&jazz_led_info);
 290 }
 291
 292 type_init(jazz_led_register);