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 #ifdef DEBUG_LED
  33 #define DPRINTF(fmt, ...) \
  34 do { printf("jazz led: " fmt , ## __VA_ARGS__); } while (0)
  35 #else
  36 #define DPRINTF(fmt, ...) do {} while (0)
  37 #endif
  38 #define BADF(fmt, ...) \
  39 do { fprintf(stderr, "jazz led ERROR: " fmt , ## __VA_ARGS__);} while (0)
  40
  41 typedef enum {
  42     REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,
  43 } screen_state_t;
  44
  45 typedef struct LedState {
  46     uint8_t segments;
  47     DisplayState *ds;
  48     screen_state_t state;
  49 } LedState;
  50
  51 static uint32_t led_readb(void *opaque, target_phys_addr_t addr)
  52 {
  53     LedState *s = opaque;
  54     uint32_t val;
  55
  56     switch (addr) {
  57         case 0:
  58             val = s->segments;
  59             break;
  60         default:
  61             BADF("invalid read at [" TARGET_FMT_plx "]\n", addr);
  62             val = 0;
  63     }
  64
  65     DPRINTF("read addr=" TARGET_FMT_plx " val=0x%02x\n", addr, val);
  66
  67     return val;
  68 }
  69
  70 static uint32_t led_readw(void *opaque, target_phys_addr_t addr)
  71 {
  72     uint32_t v;
  73 #ifdef TARGET_WORDS_BIGENDIAN
  74     v = led_readb(opaque, addr) << 8;
  75     v |= led_readb(opaque, addr + 1);
  76 #else
  77     v = led_readb(opaque, addr);
  78     v |= led_readb(opaque, addr + 1) << 8;
  79 #endif
  80     return v;
  81 }
  82
  83 static uint32_t led_readl(void *opaque, target_phys_addr_t addr)
  84 {
  85     uint32_t v;
  86 #ifdef TARGET_WORDS_BIGENDIAN
  87     v = led_readb(opaque, addr) << 24;
  88     v |= led_readb(opaque, addr + 1) << 16;
  89     v |= led_readb(opaque, addr + 2) << 8;
  90     v |= led_readb(opaque, addr + 3);
  91 #else
  92     v = led_readb(opaque, addr);
  93     v |= led_readb(opaque, addr + 1) << 8;
  94     v |= led_readb(opaque, addr + 2) << 16;
  95     v |= led_readb(opaque, addr + 3) << 24;
  96 #endif
  97     return v;
  98 }
  99
 100 static void led_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 101 {
 102     LedState *s = opaque;
 103
 104     DPRINTF("write addr=" TARGET_FMT_plx " val=0x%02x\n", addr, val);
 105
 106     switch (addr) {
 107         case 0:
 108             s->segments = val;
 109             s->state |= REDRAW_SEGMENTS;
 110             break;
 111         default:
 112             BADF("invalid write of 0x%08x at [" TARGET_FMT_plx "]\n", val, addr);
 113             break;
 114     }
 115 }
 116
 117 static void led_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
 118 {
 119 #ifdef TARGET_WORDS_BIGENDIAN
 120     led_writeb(opaque, addr, (val >> 8) & 0xff);
 121     led_writeb(opaque, addr + 1, val & 0xff);
 122 #else
 123     led_writeb(opaque, addr, val & 0xff);
 124     led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 125 #endif
 126 }
 127
 128 static void led_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 129 {
 130 #ifdef TARGET_WORDS_BIGENDIAN
 131     led_writeb(opaque, addr, (val >> 24) & 0xff);
 132     led_writeb(opaque, addr + 1, (val >> 16) & 0xff);
 133     led_writeb(opaque, addr + 2, (val >> 8) & 0xff);
 134     led_writeb(opaque, addr + 3, val & 0xff);
 135 #else
 136     led_writeb(opaque, addr, val & 0xff);
 137     led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 138     led_writeb(opaque, addr + 2, (val >> 16) & 0xff);
 139     led_writeb(opaque, addr + 3, (val >> 24) & 0xff);
 140 #endif
 141 }
 142
 143 static CPUReadMemoryFunc * const led_read[3] = {
 144     led_readb,
 145     led_readw,
 146     led_readl,
 147 };
 148
 149 static CPUWriteMemoryFunc * const led_write[3] = {
 150     led_writeb,
 151     led_writew,
 152     led_writel,
 153 };
 154
 155 /***********************************************************/
 156 /* jazz_led display */
 157
 158 static void draw_horizontal_line(DisplayState *ds, int posy, int posx1, int posx2, uint32_t color)
 159 {
 160     uint8_t *d;
 161     int x, bpp;
 162
 163     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 164     d = ds_get_data(ds) + ds_get_linesize(ds) * posy + bpp * posx1;
 165     switch(bpp) {
 166         case 1:
 167             for (x = posx1; x <= posx2; x++) {
 168                 *((uint8_t *)d) = color;
 169                 d++;
 170             }
 171             break;
 172         case 2:
 173             for (x = posx1; x <= posx2; x++) {
 174                 *((uint16_t *)d) = color;
 175                 d += 2;
 176             }
 177             break;
 178         case 4:
 179             for (x = posx1; x <= posx2; x++) {
 180                 *((uint32_t *)d) = color;
 181                 d += 4;
 182             }
 183             break;
 184     }
 185 }
 186
 187 static void draw_vertical_line(DisplayState *ds, int posx, int posy1, int posy2, uint32_t color)
 188 {
 189     uint8_t *d;
 190     int y, bpp;
 191
 192     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 193     d = ds_get_data(ds) + ds_get_linesize(ds) * posy1 + bpp * posx;
 194     switch(bpp) {
 195         case 1:
 196             for (y = posy1; y <= posy2; y++) {
 197                 *((uint8_t *)d) = color;
 198                 d += ds_get_linesize(ds);
 199             }
 200             break;
 201         case 2:
 202             for (y = posy1; y <= posy2; y++) {
 203                 *((uint16_t *)d) = color;
 204                 d += ds_get_linesize(ds);
 205             }
 206             break;
 207         case 4:
 208             for (y = posy1; y <= posy2; y++) {
 209                 *((uint32_t *)d) = color;
 210                 d += ds_get_linesize(ds);
 211             }
 212             break;
 213     }
 214 }
 215
 216 static void jazz_led_update_display(void *opaque)
 217 {
 218     LedState *s = opaque;
 219     DisplayState *ds = s->ds;
 220     uint8_t *d1;
 221     uint32_t color_segment, color_led;
 222     int y, bpp;
 223
 224     if (s->state & REDRAW_BACKGROUND) {
 225         /* clear screen */
 226         bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 227         d1 = ds_get_data(ds);
 228         for (y = 0; y < ds_get_height(ds); y++) {
 229             memset(d1, 0x00, ds_get_width(ds) * bpp);
 230             d1 += ds_get_linesize(ds);
 231         }
 232     }
 233
 234     if (s->state & REDRAW_SEGMENTS) {
 235         /* set colors according to bpp */
 236         switch (ds_get_bits_per_pixel(ds)) {
 237             case 8:
 238                 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 239                 color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 240                 break;
 241             case 15:
 242                 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 243                 color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 244                 break;
 245             case 16:
 246                 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 247                 color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 248             case 24:
 249                 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 250                 color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 251                 break;
 252             case 32:
 253                 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 254                 color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 255                 break;
 256             default:
 257                 return;
 258         }
 259
 260         /* display segments */
 261         draw_horizontal_line(ds, 40, 10, 40, (s->segments & 0x02) ? color_segment : 0);
 262         draw_vertical_line(ds, 10, 10, 40, (s->segments & 0x04) ? color_segment : 0);
 263         draw_vertical_line(ds, 10, 40, 70, (s->segments & 0x08) ? color_segment : 0);
 264         draw_horizontal_line(ds, 70, 10, 40, (s->segments & 0x10) ? color_segment : 0);
 265         draw_vertical_line(ds, 40, 40, 70, (s->segments & 0x20) ? color_segment : 0);
 266         draw_vertical_line(ds, 40, 10, 40, (s->segments & 0x40) ? color_segment : 0);
 267         draw_horizontal_line(ds, 10, 10, 40, (s->segments & 0x80) ? color_segment : 0);
 268
 269         /* display led */
 270         if (!(s->segments & 0x01))
 271             color_led = 0; /* black */
 272         draw_horizontal_line(ds, 68, 50, 50, color_led);
 273         draw_horizontal_line(ds, 69, 49, 51, color_led);
 274         draw_horizontal_line(ds, 70, 48, 52, color_led);
 275         draw_horizontal_line(ds, 71, 49, 51, color_led);
 276         draw_horizontal_line(ds, 72, 50, 50, color_led);
 277     }
 278
 279     s->state = REDRAW_NONE;
 280     dpy_update(ds, 0, 0, ds_get_width(ds), ds_get_height(ds));
 281 }
 282
 283 static void jazz_led_invalidate_display(void *opaque)
 284 {
 285     LedState *s = opaque;
 286     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 287 }
 288
 289 static void jazz_led_screen_dump(void *opaque, const char *filename)
 290 {
 291     printf("jazz_led_screen_dump() not implemented\n");
 292 }
 293
 294 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 295 {
 296     LedState *s = opaque;
 297     char buf[2];
 298
 299     dpy_cursor(s->ds, -1, -1);
 300     qemu_console_resize(s->ds, 2, 1);
 301
 302     /* TODO: draw the segments */
 303     snprintf(buf, 2, "%02hhx\n", s->segments);
 304     console_write_ch(chardata++, 0x00200100 | buf[0]);
 305     console_write_ch(chardata++, 0x00200100 | buf[1]);
 306
 307     dpy_update(s->ds, 0, 0, 2, 1);
 308 }
 309
 310 void jazz_led_init(target_phys_addr_t base)
 311 {
 312     LedState *s;
 313     int io;
 314
 315     s = qemu_mallocz(sizeof(LedState));
 316
 317     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 318
 319     io = cpu_register_io_memory(led_read, led_write, s,
 320                                 DEVICE_NATIVE_ENDIAN);
 321     cpu_register_physical_memory(base, 1, io);
 322
 323     s->ds = graphic_console_init(jazz_led_update_display,
 324                                  jazz_led_invalidate_display,
 325                                  jazz_led_screen_dump,
 326                                  jazz_led_text_update, s);
 327     qemu_console_resize(s->ds, 60, 80);
 328 }