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 "hw.h"
  26 #include "mips.h"
  27 #include "console.h"
  28 #include "pixel_ops.h"
  29
  30 //#define DEBUG_LED
  31
  32 typedef enum {
  33     REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,
  34 } screen_state_t;
  35
  36 typedef struct LedState {
  37     uint8_t segments;
  38     DisplayState *ds;
  39     screen_state_t state;
  40 } LedState;
  41
  42 static uint32_t led_readb(void *opaque, target_phys_addr_t addr)
  43 {
  44     LedState *s = opaque;
  45     uint32_t val;
  46
  47     switch (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
  95     switch (addr) {
  96         case 0:
  97             s->segments = val;
  98             s->state |= REDRAW_SEGMENTS;
  99             break;
 100         default:
 101 #ifdef DEBUG_LED
 102             printf("jazz led: invalid write of 0x%02x at [0x%x]\n", val, relative_addr);
 103 #endif
 104             break;
 105     }
 106 }
 107
 108 static void led_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
 109 {
 110 #ifdef TARGET_WORDS_BIGENDIAN
 111     led_writeb(opaque, addr, (val >> 8) & 0xff);
 112     led_writeb(opaque, addr + 1, val & 0xff);
 113 #else
 114     led_writeb(opaque, addr, val & 0xff);
 115     led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 116 #endif
 117 }
 118
 119 static void led_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 120 {
 121 #ifdef TARGET_WORDS_BIGENDIAN
 122     led_writeb(opaque, addr, (val >> 24) & 0xff);
 123     led_writeb(opaque, addr + 1, (val >> 16) & 0xff);
 124     led_writeb(opaque, addr + 2, (val >> 8) & 0xff);
 125     led_writeb(opaque, addr + 3, val & 0xff);
 126 #else
 127     led_writeb(opaque, addr, val & 0xff);
 128     led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 129     led_writeb(opaque, addr + 2, (val >> 16) & 0xff);
 130     led_writeb(opaque, addr + 3, (val >> 24) & 0xff);
 131 #endif
 132 }
 133
 134 static CPUReadMemoryFunc *led_read[3] = {
 135     led_readb,
 136     led_readw,
 137     led_readl,
 138 };
 139
 140 static CPUWriteMemoryFunc *led_write[3] = {
 141     led_writeb,
 142     led_writew,
 143     led_writel,
 144 };
 145
 146 /***********************************************************/
 147 /* jazz_led display */
 148
 149 static void draw_horizontal_line(DisplayState *ds, int posy, int posx1, int posx2, uint32_t color)
 150 {
 151     uint8_t *d;
 152     int x, bpp;
 153
 154     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 155     d = ds_get_data(ds) + ds_get_linesize(ds) * posy + bpp * posx1;
 156     switch(bpp) {
 157         case 1:
 158             for (x = posx1; x <= posx2; x++) {
 159                 *((uint8_t *)d) = color;
 160                 d++;
 161             }
 162             break;
 163         case 2:
 164             for (x = posx1; x <= posx2; x++) {
 165                 *((uint16_t *)d) = color;
 166                 d += 2;
 167             }
 168             break;
 169         case 4:
 170             for (x = posx1; x <= posx2; x++) {
 171                 *((uint32_t *)d) = color;
 172                 d += 4;
 173             }
 174             break;
 175     }
 176 }
 177
 178 static void draw_vertical_line(DisplayState *ds, int posx, int posy1, int posy2, uint32_t color)
 179 {
 180     uint8_t *d;
 181     int y, bpp;
 182
 183     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 184     d = ds_get_data(ds) + ds_get_linesize(ds) * posy1 + bpp * posx;
 185     switch(bpp) {
 186         case 1:
 187             for (y = posy1; y <= posy2; y++) {
 188                 *((uint8_t *)d) = color;
 189                 d += ds_get_linesize(ds);
 190             }
 191             break;
 192         case 2:
 193             for (y = posy1; y <= posy2; y++) {
 194                 *((uint16_t *)d) = color;
 195                 d += ds_get_linesize(ds);
 196             }
 197             break;
 198         case 4:
 199             for (y = posy1; y <= posy2; y++) {
 200                 *((uint32_t *)d) = color;
 201                 d += ds_get_linesize(ds);
 202             }
 203             break;
 204     }
 205 }
 206
 207 static void jazz_led_update_display(void *opaque)
 208 {
 209     LedState *s = opaque;
 210     DisplayState *ds = s->ds;
 211     uint8_t *d1;
 212     uint32_t color_segment, color_led;
 213     int y, bpp;
 214
 215     if (s->state & REDRAW_BACKGROUND) {
 216         /* clear screen */
 217         bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 218         d1 = ds_get_data(ds);
 219         for (y = 0; y < ds_get_height(ds); y++) {
 220             memset(d1, 0x00, ds_get_width(ds) * bpp);
 221             d1 += ds_get_linesize(ds);
 222         }
 223     }
 224
 225     if (s->state & REDRAW_SEGMENTS) {
 226         /* set colors according to bpp */
 227         switch (ds_get_bits_per_pixel(ds)) {
 228             case 8:
 229                 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 230                 color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 231                 break;
 232             case 15:
 233                 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 234                 color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 235                 break;
 236             case 16:
 237                 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 238                 color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 239             case 24:
 240                 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 241                 color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 242                 break;
 243             case 32:
 244                 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 245                 color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 246                 break;
 247             default:
 248                 return;
 249         }
 250
 251         /* display segments */
 252         draw_horizontal_line(ds, 40, 10, 40, (s->segments & 0x02) ? color_segment : 0);
 253         draw_vertical_line(ds, 10, 10, 40, (s->segments & 0x04) ? color_segment : 0);
 254         draw_vertical_line(ds, 10, 40, 70, (s->segments & 0x08) ? color_segment : 0);
 255         draw_horizontal_line(ds, 70, 10, 40, (s->segments & 0x10) ? color_segment : 0);
 256         draw_vertical_line(ds, 40, 40, 70, (s->segments & 0x20) ? color_segment : 0);
 257         draw_vertical_line(ds, 40, 10, 40, (s->segments & 0x40) ? color_segment : 0);
 258         draw_horizontal_line(ds, 10, 10, 40, (s->segments & 0x80) ? color_segment : 0);
 259
 260         /* display led */
 261         if (!(s->segments & 0x01))
 262             color_led = 0; /* black */
 263         draw_horizontal_line(ds, 68, 50, 50, color_led);
 264         draw_horizontal_line(ds, 69, 49, 51, color_led);
 265         draw_horizontal_line(ds, 70, 48, 52, color_led);
 266         draw_horizontal_line(ds, 71, 49, 51, color_led);
 267         draw_horizontal_line(ds, 72, 50, 50, color_led);
 268     }
 269
 270     s->state = REDRAW_NONE;
 271     dpy_update(ds, 0, 0, ds_get_width(ds), ds_get_height(ds));
 272 }
 273
 274 static void jazz_led_invalidate_display(void *opaque)
 275 {
 276     LedState *s = opaque;
 277     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 278 }
 279
 280 static void jazz_led_screen_dump(void *opaque, const char *filename)
 281 {
 282     printf("jazz_led_screen_dump() not implemented\n");
 283 }
 284
 285 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 286 {
 287     LedState *s = opaque;
 288     char buf[2];
 289
 290     dpy_cursor(s->ds, -1, -1);
 291     qemu_console_resize(s->ds, 2, 1);
 292
 293     /* TODO: draw the segments */
 294     snprintf(buf, 2, "%02hhx\n", s->segments);
 295     console_write_ch(chardata++, 0x00200100 | buf[0]);
 296     console_write_ch(chardata++, 0x00200100 | buf[1]);
 297
 298     dpy_update(s->ds, 0, 0, 2, 1);
 299 }
 300
 301 void jazz_led_init(target_phys_addr_t base)
 302 {
 303     LedState *s;
 304     int io;
 305
 306     s = qemu_mallocz(sizeof(LedState));
 307
 308     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 309
 310     io = cpu_register_io_memory(0, led_read, led_write, s);
 311     cpu_register_physical_memory(base, 1, io);
 312
 313     s->ds = graphic_console_init(jazz_led_update_display,
 314                                  jazz_led_invalidate_display,
 315                                  jazz_led_screen_dump,
 316                                  jazz_led_text_update, s);
 317     qemu_console_resize(s->ds, 60, 80);
 318 }