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