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 "console.h"
  26 #include "pixel_ops.h"
  27 #include "trace.h"
  28 #include "sysbus.h"
  29
  30 typedef enum {
  31     REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,
  32 } screen_state_t;
  33
  34 typedef struct LedState {
  35     SysBusDevice busdev;
  36     MemoryRegion iomem;
  37     uint8_t segments;
  38     DisplayState *ds;
  39     screen_state_t state;
  40 } LedState;
  41
  42 static uint64_t jazz_led_read(void *opaque, target_phys_addr_t addr,
  43                               unsigned int size)
  44 {
  45     LedState *s = opaque;
  46     uint8_t val;
  47
  48     val = s->segments;
  49     trace_jazz_led_read(addr, val);
  50
  51     return val;
  52 }
  53
  54 static void jazz_led_write(void *opaque, target_phys_addr_t addr,
  55                            uint64_t val, unsigned int size)
  56 {
  57     LedState *s = opaque;
  58     uint8_t new_val = val & 0xff;
  59
  60     trace_jazz_led_write(addr, new_val);
  61
  62     s->segments = new_val;
  63     s->state |= REDRAW_SEGMENTS;
  64 }
  65
  66 static const MemoryRegionOps led_ops = {
  67     .read = jazz_led_read,
  68     .write = jazz_led_write,
  69     .endianness = DEVICE_NATIVE_ENDIAN,
  70     .impl.min_access_size = 1,
  71     .impl.max_access_size = 1,
  72 };
  73
  74 /***********************************************************/
  75 /* jazz_led display */
  76
  77 static void draw_horizontal_line(DisplayState *ds, int posy, int posx1, int posx2, uint32_t color)
  78 {
  79     uint8_t *d;
  80     int x, bpp;
  81
  82     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
  83     d = ds_get_data(ds) + ds_get_linesize(ds) * posy + bpp * posx1;
  84     switch(bpp) {
  85         case 1:
  86             for (x = posx1; x <= posx2; x++) {
  87                 *((uint8_t *)d) = color;
  88                 d++;
  89             }
  90             break;
  91         case 2:
  92             for (x = posx1; x <= posx2; x++) {
  93                 *((uint16_t *)d) = color;
  94                 d += 2;
  95             }
  96             break;
  97         case 4:
  98             for (x = posx1; x <= posx2; x++) {
  99                 *((uint32_t *)d) = color;
 100                 d += 4;
 101             }
 102             break;
 103     }
 104 }
 105
 106 static void draw_vertical_line(DisplayState *ds, int posx, int posy1, int posy2, uint32_t color)
 107 {
 108     uint8_t *d;
 109     int y, bpp;
 110
 111     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 112     d = ds_get_data(ds) + ds_get_linesize(ds) * posy1 + bpp * posx;
 113     switch(bpp) {
 114         case 1:
 115             for (y = posy1; y <= posy2; y++) {
 116                 *((uint8_t *)d) = color;
 117                 d += ds_get_linesize(ds);
 118             }
 119             break;
 120         case 2:
 121             for (y = posy1; y <= posy2; y++) {
 122                 *((uint16_t *)d) = color;
 123                 d += ds_get_linesize(ds);
 124             }
 125             break;
 126         case 4:
 127             for (y = posy1; y <= posy2; y++) {
 128                 *((uint32_t *)d) = color;
 129                 d += ds_get_linesize(ds);
 130             }
 131             break;
 132     }
 133 }
 134
 135 static void jazz_led_update_display(void *opaque)
 136 {
 137     LedState *s = opaque;
 138     DisplayState *ds = s->ds;
 139     uint8_t *d1;
 140     uint32_t color_segment, color_led;
 141     int y, bpp;
 142
 143     if (s->state & REDRAW_BACKGROUND) {
 144         /* clear screen */
 145         bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 146         d1 = ds_get_data(ds);
 147         for (y = 0; y < ds_get_height(ds); y++) {
 148             memset(d1, 0x00, ds_get_width(ds) * bpp);
 149             d1 += ds_get_linesize(ds);
 150         }
 151     }
 152
 153     if (s->state & REDRAW_SEGMENTS) {
 154         /* set colors according to bpp */
 155         switch (ds_get_bits_per_pixel(ds)) {
 156             case 8:
 157                 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 158                 color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 159                 break;
 160             case 15:
 161                 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 162                 color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 163                 break;
 164             case 16:
 165                 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 166                 color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 167             case 24:
 168                 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 169                 color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 170                 break;
 171             case 32:
 172                 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 173                 color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 174                 break;
 175             default:
 176                 return;
 177         }
 178
 179         /* display segments */
 180         draw_horizontal_line(ds, 40, 10, 40, (s->segments & 0x02) ? color_segment : 0);
 181         draw_vertical_line(ds, 10, 10, 40, (s->segments & 0x04) ? color_segment : 0);
 182         draw_vertical_line(ds, 10, 40, 70, (s->segments & 0x08) ? color_segment : 0);
 183         draw_horizontal_line(ds, 70, 10, 40, (s->segments & 0x10) ? color_segment : 0);
 184         draw_vertical_line(ds, 40, 40, 70, (s->segments & 0x20) ? color_segment : 0);
 185         draw_vertical_line(ds, 40, 10, 40, (s->segments & 0x40) ? color_segment : 0);
 186         draw_horizontal_line(ds, 10, 10, 40, (s->segments & 0x80) ? color_segment : 0);
 187
 188         /* display led */
 189         if (!(s->segments & 0x01))
 190             color_led = 0; /* black */
 191         draw_horizontal_line(ds, 68, 50, 50, color_led);
 192         draw_horizontal_line(ds, 69, 49, 51, color_led);
 193         draw_horizontal_line(ds, 70, 48, 52, color_led);
 194         draw_horizontal_line(ds, 71, 49, 51, color_led);
 195         draw_horizontal_line(ds, 72, 50, 50, color_led);
 196     }
 197
 198     s->state = REDRAW_NONE;
 199     dpy_update(ds, 0, 0, ds_get_width(ds), ds_get_height(ds));
 200 }
 201
 202 static void jazz_led_invalidate_display(void *opaque)
 203 {
 204     LedState *s = opaque;
 205     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 206 }
 207
 208 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 209 {
 210     LedState *s = opaque;
 211     char buf[2];
 212
 213     dpy_cursor(s->ds, -1, -1);
 214     qemu_console_resize(s->ds, 2, 1);
 215
 216     /* TODO: draw the segments */
 217     snprintf(buf, 2, "%02hhx\n", s->segments);
 218     console_write_ch(chardata++, 0x00200100 | buf[0]);
 219     console_write_ch(chardata++, 0x00200100 | buf[1]);
 220
 221     dpy_update(s->ds, 0, 0, 2, 1);
 222 }
 223
 224 static int jazz_led_post_load(void *opaque, int version_id)
 225 {
 226     /* force refresh */
 227     jazz_led_invalidate_display(opaque);
 228
 229     return 0;
 230 }
 231
 232 static const VMStateDescription vmstate_jazz_led = {
 233     .name = "jazz-led",
 234     .version_id = 0,
 235     .minimum_version_id = 0,
 236     .minimum_version_id_old = 0,
 237     .post_load = jazz_led_post_load,
 238     .fields = (VMStateField[]) {
 239         VMSTATE_UINT8(segments, LedState),
 240         VMSTATE_END_OF_LIST()
 241     }
 242 };
 243
 244 static int jazz_led_init(SysBusDevice *dev)
 245 {
 246     LedState *s = FROM_SYSBUS(LedState, dev);
 247
 248     memory_region_init_io(&s->iomem, &led_ops, s, "led", 1);
 249     sysbus_init_mmio(dev, &s->iomem);
 250
 251     s->ds = graphic_console_init(jazz_led_update_display,
 252                                  jazz_led_invalidate_display,
 253                                  NULL,
 254                                  jazz_led_text_update, s);
 255
 256     return 0;
 257 }
 258
 259 static void jazz_led_reset(DeviceState *d)
 260 {
 261     LedState *s = DO_UPCAST(LedState, busdev.qdev, d);
 262
 263     s->segments = 0;
 264     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 265     qemu_console_resize(s->ds, 60, 80);
 266 }
 267
 268 static void jazz_led_class_init(ObjectClass *klass, void *data)
 269 {
 270     DeviceClass *dc = DEVICE_CLASS(klass);
 271     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 272
 273     k->init = jazz_led_init;
 274     dc->desc = "Jazz LED display",
 275     dc->vmsd = &vmstate_jazz_led;
 276     dc->reset = jazz_led_reset;
 277 }
 278
 279 static TypeInfo jazz_led_info = {
 280     .name          = "jazz-led",
 281     .parent        = TYPE_SYS_BUS_DEVICE,
 282     .instance_size = sizeof(LedState),
 283     .class_init    = jazz_led_class_init,
 284 };
 285
 286 static void jazz_led_register(void)
 287 {
 288     type_register_static(&jazz_led_info);
 289 }
 290
 291 type_init(jazz_led_register);