hw/jazz_led.c

   1 /*
   2  * QEMU JAZZ LED emulator.
   3  *
   4  * Copyright (c) 2007 Hervé 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 "vl.h"
  26 #include "pixel_ops.h"
  27
  28 //#define DEBUG_LED
  29
  30 typedef enum {
  31     REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,
  32 } screen_state_t;
  33
  34 typedef struct LedState {
  35     target_phys_addr_t base;
  36     uint8_t segments;
  37     DisplayState *ds;
  38     screen_state_t state;
  39 } LedState;
  40
  41 static uint32_t led_readb(void *opaque, target_phys_addr_t addr)
  42 {
  43     LedState *s = opaque;
  44     int relative_addr = addr - s->base;
  45     uint32_t val;
  46
  47     switch (relative_addr) {
  48         case 0:
  49             val = s->segments;
  50             break;
  51         default:
  52 #ifdef DEBUG_LED
  53             printf("jazz led: invalid read [0x%x]\n", relative_addr);
  54 #endif
  55             val = 0;
  56     }
  57
  58     return val;
  59 }
  60
  61 static uint32_t led_readw(void *opaque, target_phys_addr_t addr)
  62 {
  63     uint32_t v;
  64 #ifdef TARGET_WORDS_BIGENDIAN
  65     v = led_readb(opaque, addr) << 8;
  66     v |= led_readb(opaque, addr + 1);
  67 #else
  68     v = led_readb(opaque, addr);
  69     v |= led_readb(opaque, addr + 1) << 8;
  70 #endif
  71     return v;
  72 }
  73
  74 static uint32_t led_readl(void *opaque, target_phys_addr_t addr)
  75 {
  76     uint32_t v;
  77 #ifdef TARGET_WORDS_BIGENDIAN
  78     v = led_readb(opaque, addr) << 24;
  79     v |= led_readb(opaque, addr + 1) << 16;
  80     v |= led_readb(opaque, addr + 2) << 8;
  81     v |= led_readb(opaque, addr + 3);
  82 #else
  83     v = led_readb(opaque, addr);
  84     v |= led_readb(opaque, addr + 1) << 8;
  85     v |= led_readb(opaque, addr + 2) << 16;
  86     v |= led_readb(opaque, addr + 3) << 24;
  87 #endif
  88     return v;
  89 }
  90
  91 static void led_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
  92 {
  93     LedState *s = opaque;
  94     int relative_addr = addr - s->base;
  95
  96     switch (relative_addr) {
  97         case 0:
  98             s->segments = val;
  99             s->state |= REDRAW_SEGMENTS;
 100             break;
 101         default:
 102 #ifdef DEBUG_LED
 103             printf("jazz led: invalid write of 0x%02x at [0x%x]\n", val, relative_addr);
 104 #endif
 105             break;
 106     }
 107 }
 108
 109 static void led_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
 110 {
 111 #ifdef TARGET_WORDS_BIGENDIAN
 112     led_writeb(opaque, addr, (val >> 8) & 0xff);
 113     led_writeb(opaque, addr + 1, val & 0xff);
 114 #else
 115     led_writeb(opaque, addr, val & 0xff);
 116     led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 117 #endif
 118 }
 119
 120 static void led_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 121 {
 122 #ifdef TARGET_WORDS_BIGENDIAN
 123     led_writeb(opaque, addr, (val >> 24) & 0xff);
 124     led_writeb(opaque, addr + 1, (val >> 16) & 0xff);
 125     led_writeb(opaque, addr + 2, (val >> 8) & 0xff);
 126     led_writeb(opaque, addr + 3, val & 0xff);
 127 #else
 128     led_writeb(opaque, addr, val & 0xff);
 129     led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 130     led_writeb(opaque, addr + 2, (val >> 16) & 0xff);
 131     led_writeb(opaque, addr + 3, (val >> 24) & 0xff);
 132 #endif
 133 }
 134
 135 static CPUReadMemoryFunc *led_read[3] = {
 136     led_readb,
 137     led_readw,
 138     led_readl,
 139 };
 140
 141 static CPUWriteMemoryFunc *led_write[3] = {
 142     led_writeb,
 143     led_writew,
 144     led_writel,
 145 };
 146
 147 /***********************************************************/
 148 /* jazz_led display */
 149
 150 static void draw_horizontal_line(DisplayState *ds, int posy, int posx1, int posx2, uint32_t color)
 151 {
 152     uint8_t *d;
 153     int x, bpp;
 154
 155     bpp = (ds->depth + 7) >> 3;
 156     d = ds->data + ds->linesize * posy + bpp * posx1;
 157     switch(bpp) {
 158         case 1:
 159             for (x = posx1; x <= posx2; x++) {
 160                 *((uint8_t *)d) = color;
 161                 d++;
 162             }
 163             break;
 164         case 2:
 165             for (x = posx1; x <= posx2; x++) {
 166                 *((uint16_t *)d) = color;
 167                 d += 2;
 168             }
 169             break;
 170         case 4:
 171             for (x = posx1; x <= posx2; x++) {
 172                 *((uint32_t *)d) = color;
 173                 d += 4;
 174             }
 175             break;
 176     }
 177 }
 178
 179 static void draw_vertical_line(DisplayState *ds, int posx, int posy1, int posy2, uint32_t color)
 180 {
 181     uint8_t *d;
 182     int y, bpp;
 183
 184     bpp = (ds->depth + 7) >> 3;
 185     d = ds->data + ds->linesize * posy1 + bpp * posx;
 186     switch(bpp) {
 187         case 1:
 188             for (y = posy1; y <= posy2; y++) {
 189                 *((uint8_t *)d) = color;
 190                 d += ds->linesize;
 191             }
 192             break;
 193         case 2:
 194             for (y = posy1; y <= posy2; y++) {
 195                 *((uint16_t *)d) = color;
 196                 d += ds->linesize;
 197             }
 198             break;
 199         case 4:
 200             for (y = posy1; y <= posy2; y++) {
 201                 *((uint32_t *)d) = color;
 202                 d += ds->linesize;
 203             }
 204             break;
 205     }
 206 }
 207
 208 static void jazz_led_update_display(void *opaque)
 209 {
 210     LedState *s = opaque;
 211     DisplayState *ds = s->ds;
 212     uint8_t *d1;
 213     uint32_t color_segment, color_led;
 214     int y, bpp;
 215
 216     if (s->state & REDRAW_BACKGROUND) {
 217         /* clear screen */
 218         bpp = (ds->depth + 7) >> 3;
 219         d1 = ds->data;
 220         for (y = 0; y < ds->height; y++) {
 221             memset(d1, 0x00, ds->width * bpp);
 222             d1 += ds->linesize;
 223         }
 224     }
 225
 226     if (s->state & REDRAW_SEGMENTS) {
 227         /* set colors according to bpp */
 228         switch (ds->depth) {
 229             case 8:
 230                 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 231                 color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 232                 break;
 233             case 15:
 234                 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 235                 color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 236                 break;
 237             case 16:
 238                 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 239                 color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 240             case 24:
 241                 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 242                 color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 243                 break;
 244             case 32:
 245                 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 246                 color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 247                 break;
 248             default:
 249                 return;
 250         }
 251
 252         /* display segments */
 253         draw_horizontal_line(ds, 40, 10, 40, (s->segments & 0x02) ? color_segment : 0);
 254         draw_vertical_line(ds, 10, 10, 40, (s->segments & 0x04) ? color_segment : 0);
 255         draw_vertical_line(ds, 10, 40, 70, (s->segments & 0x08) ? color_segment : 0);
 256         draw_horizontal_line(ds, 70, 10, 40, (s->segments & 0x10) ? color_segment : 0);
 257         draw_vertical_line(ds, 40, 40, 70, (s->segments & 0x20) ? color_segment : 0);
 258         draw_vertical_line(ds, 40, 10, 40, (s->segments & 0x40) ? color_segment : 0);
 259         draw_horizontal_line(ds, 10, 10, 40, (s->segments & 0x80) ? color_segment : 0);
 260
 261         /* display led */
 262         if (!(s->segments & 0x01))
 263             color_led = 0; /* black */
 264         draw_horizontal_line(ds, 68, 50, 50, color_led);
 265         draw_horizontal_line(ds, 69, 49, 51, color_led);
 266         draw_horizontal_line(ds, 70, 48, 52, color_led);
 267         draw_horizontal_line(ds, 71, 49, 51, color_led);
 268         draw_horizontal_line(ds, 72, 50, 50, color_led);
 269     }
 270
 271     s->state = REDRAW_NONE;
 272     dpy_update(ds, 0, 0, ds->width, ds->height);
 273 }
 274
 275 static void jazz_led_invalidate_display(void *opaque)
 276 {
 277     LedState *s = opaque;
 278     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 279 }
 280
 281 static void jazz_led_screen_dump(void *opaque, const char *filename)
 282 {
 283     printf("jazz_led_screen_dump() not implemented\n");
 284 }
 285
 286 void jazz_led_init(DisplayState *ds, target_phys_addr_t base)
 287 {
 288     LedState *s;
 289     int io;
 290
 291     s = qemu_mallocz(sizeof(LedState));
 292     if (!s)
 293         return;
 294
 295     s->base = base;
 296     s->ds = ds;
 297     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 298
 299     io = cpu_register_io_memory(0, led_read, led_write, s);
 300     cpu_register_physical_memory(s->base, 1, io);
 301
 302     graphic_console_init(ds, jazz_led_update_display, jazz_led_invalidate_display, jazz_led_screen_dump, s);
 303 }