jazz_led.c (9432B)
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 OBJECT_DECLARE_SIMPLE_TYPE(LedState, JAZZ_LED) 40 41 struct LedState { 42 SysBusDevice parent_obj; 43 44 MemoryRegion iomem; 45 uint8_t segments; 46 QemuConsole *con; 47 screen_state_t state; 48 }; 49 50 static uint64_t jazz_led_read(void *opaque, hwaddr addr, 51 unsigned int size) 52 { 53 LedState *s = opaque; 54 uint8_t val; 55 56 val = s->segments; 57 trace_jazz_led_read(addr, val); 58 59 return val; 60 } 61 62 static void jazz_led_write(void *opaque, hwaddr addr, 63 uint64_t val, unsigned int size) 64 { 65 LedState *s = opaque; 66 uint8_t new_val = val & 0xff; 67 68 trace_jazz_led_write(addr, new_val); 69 70 s->segments = new_val; 71 s->state |= REDRAW_SEGMENTS; 72 } 73 74 static const MemoryRegionOps led_ops = { 75 .read = jazz_led_read, 76 .write = jazz_led_write, 77 .endianness = DEVICE_NATIVE_ENDIAN, 78 .impl.min_access_size = 1, 79 .impl.max_access_size = 1, 80 }; 81 82 /***********************************************************/ 83 /* jazz_led display */ 84 85 static void draw_horizontal_line(DisplaySurface *ds, 86 int posy, int posx1, int posx2, 87 uint32_t color) 88 { 89 uint8_t *d; 90 int x, bpp; 91 92 bpp = (surface_bits_per_pixel(ds) + 7) >> 3; 93 d = surface_data(ds) + surface_stride(ds) * posy + bpp * posx1; 94 switch (bpp) { 95 case 1: 96 for (x = posx1; x <= posx2; x++) { 97 *((uint8_t *)d) = color; 98 d++; 99 } 100 break; 101 case 2: 102 for (x = posx1; x <= posx2; x++) { 103 *((uint16_t *)d) = color; 104 d += 2; 105 } 106 break; 107 case 4: 108 for (x = posx1; x <= posx2; x++) { 109 *((uint32_t *)d) = color; 110 d += 4; 111 } 112 break; 113 } 114 } 115 116 static void draw_vertical_line(DisplaySurface *ds, 117 int posx, int posy1, int posy2, 118 uint32_t color) 119 { 120 uint8_t *d; 121 int y, bpp; 122 123 bpp = (surface_bits_per_pixel(ds) + 7) >> 3; 124 d = surface_data(ds) + surface_stride(ds) * posy1 + bpp * posx; 125 switch (bpp) { 126 case 1: 127 for (y = posy1; y <= posy2; y++) { 128 *((uint8_t *)d) = color; 129 d += surface_stride(ds); 130 } 131 break; 132 case 2: 133 for (y = posy1; y <= posy2; y++) { 134 *((uint16_t *)d) = color; 135 d += surface_stride(ds); 136 } 137 break; 138 case 4: 139 for (y = posy1; y <= posy2; y++) { 140 *((uint32_t *)d) = color; 141 d += surface_stride(ds); 142 } 143 break; 144 } 145 } 146 147 static void jazz_led_update_display(void *opaque) 148 { 149 LedState *s = opaque; 150 DisplaySurface *surface = qemu_console_surface(s->con); 151 uint8_t *d1; 152 uint32_t color_segment, color_led; 153 int y, bpp; 154 155 if (s->state & REDRAW_BACKGROUND) { 156 /* clear screen */ 157 bpp = (surface_bits_per_pixel(surface) + 7) >> 3; 158 d1 = surface_data(surface); 159 for (y = 0; y < surface_height(surface); y++) { 160 memset(d1, 0x00, surface_width(surface) * bpp); 161 d1 += surface_stride(surface); 162 } 163 } 164 165 if (s->state & REDRAW_SEGMENTS) { 166 /* set colors according to bpp */ 167 switch (surface_bits_per_pixel(surface)) { 168 case 8: 169 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa); 170 color_led = rgb_to_pixel8(0x00, 0xff, 0x00); 171 break; 172 case 15: 173 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa); 174 color_led = rgb_to_pixel15(0x00, 0xff, 0x00); 175 break; 176 case 16: 177 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa); 178 color_led = rgb_to_pixel16(0x00, 0xff, 0x00); 179 break; 180 case 24: 181 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa); 182 color_led = rgb_to_pixel24(0x00, 0xff, 0x00); 183 break; 184 case 32: 185 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa); 186 color_led = rgb_to_pixel32(0x00, 0xff, 0x00); 187 break; 188 default: 189 return; 190 } 191 192 /* display segments */ 193 draw_horizontal_line(surface, 40, 10, 40, 194 (s->segments & 0x02) ? color_segment : 0); 195 draw_vertical_line(surface, 10, 10, 40, 196 (s->segments & 0x04) ? color_segment : 0); 197 draw_vertical_line(surface, 10, 40, 70, 198 (s->segments & 0x08) ? color_segment : 0); 199 draw_horizontal_line(surface, 70, 10, 40, 200 (s->segments & 0x10) ? color_segment : 0); 201 draw_vertical_line(surface, 40, 40, 70, 202 (s->segments & 0x20) ? color_segment : 0); 203 draw_vertical_line(surface, 40, 10, 40, 204 (s->segments & 0x40) ? color_segment : 0); 205 draw_horizontal_line(surface, 10, 10, 40, 206 (s->segments & 0x80) ? color_segment : 0); 207 208 /* display led */ 209 if (!(s->segments & 0x01)) { 210 color_led = 0; /* black */ 211 } 212 draw_horizontal_line(surface, 68, 50, 50, color_led); 213 draw_horizontal_line(surface, 69, 49, 51, color_led); 214 draw_horizontal_line(surface, 70, 48, 52, color_led); 215 draw_horizontal_line(surface, 71, 49, 51, color_led); 216 draw_horizontal_line(surface, 72, 50, 50, color_led); 217 } 218 219 s->state = REDRAW_NONE; 220 dpy_gfx_update_full(s->con); 221 } 222 223 static void jazz_led_invalidate_display(void *opaque) 224 { 225 LedState *s = opaque; 226 s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND; 227 } 228 229 static void jazz_led_text_update(void *opaque, console_ch_t *chardata) 230 { 231 LedState *s = opaque; 232 char buf[3]; 233 234 dpy_text_cursor(s->con, -1, -1); 235 qemu_console_resize(s->con, 2, 1); 236 237 /* TODO: draw the segments */ 238 snprintf(buf, 3, "%02hhx", s->segments); 239 console_write_ch(chardata++, ATTR2CHTYPE(buf[0], QEMU_COLOR_BLUE, 240 QEMU_COLOR_BLACK, 1)); 241 console_write_ch(chardata++, ATTR2CHTYPE(buf[1], QEMU_COLOR_BLUE, 242 QEMU_COLOR_BLACK, 1)); 243 244 dpy_text_update(s->con, 0, 0, 2, 1); 245 } 246 247 static int jazz_led_post_load(void *opaque, int version_id) 248 { 249 /* force refresh */ 250 jazz_led_invalidate_display(opaque); 251 252 return 0; 253 } 254 255 static const VMStateDescription vmstate_jazz_led = { 256 .name = "jazz-led", 257 .version_id = 0, 258 .minimum_version_id = 0, 259 .post_load = jazz_led_post_load, 260 .fields = (VMStateField[]) { 261 VMSTATE_UINT8(segments, LedState), 262 VMSTATE_END_OF_LIST() 263 } 264 }; 265 266 static const GraphicHwOps jazz_led_ops = { 267 .invalidate = jazz_led_invalidate_display, 268 .gfx_update = jazz_led_update_display, 269 .text_update = jazz_led_text_update, 270 }; 271 272 static void jazz_led_init(Object *obj) 273 { 274 LedState *s = JAZZ_LED(obj); 275 SysBusDevice *dev = SYS_BUS_DEVICE(obj); 276 277 memory_region_init_io(&s->iomem, obj, &led_ops, s, "led", 1); 278 sysbus_init_mmio(dev, &s->iomem); 279 } 280 281 static void jazz_led_realize(DeviceState *dev, Error **errp) 282 { 283 LedState *s = JAZZ_LED(dev); 284 285 s->con = graphic_console_init(dev, 0, &jazz_led_ops, s); 286 } 287 288 static void jazz_led_reset(DeviceState *d) 289 { 290 LedState *s = JAZZ_LED(d); 291 292 s->segments = 0; 293 s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND; 294 qemu_console_resize(s->con, 60, 80); 295 } 296 297 static void jazz_led_class_init(ObjectClass *klass, void *data) 298 { 299 DeviceClass *dc = DEVICE_CLASS(klass); 300 301 dc->desc = "Jazz LED display", 302 dc->vmsd = &vmstate_jazz_led; 303 dc->reset = jazz_led_reset; 304 dc->realize = jazz_led_realize; 305 } 306 307 static const TypeInfo jazz_led_info = { 308 .name = TYPE_JAZZ_LED, 309 .parent = TYPE_SYS_BUS_DEVICE, 310 .instance_size = sizeof(LedState), 311 .instance_init = jazz_led_init, 312 .class_init = jazz_led_class_init, 313 }; 314 315 static void jazz_led_register(void) 316 { 317 type_register_static(&jazz_led_info); 318 } 319 320 type_init(jazz_led_register);