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     MemoryRegion iomem;
  47     uint8_t segments;
  48     DisplayState *ds;
  49     screen_state_t state;
  50 } LedState;
  51
  52 static uint32_t led_readb(void *opaque, target_phys_addr_t addr)
  53 {
  54     LedState *s = opaque;
  55     uint32_t val;
  56
  57     switch (addr) {
  58         case 0:
  59             val = s->segments;
  60             break;
  61         default:
  62             BADF("invalid read at [" TARGET_FMT_plx "]\n", addr);
  63             val = 0;
  64     }
  65
  66     DPRINTF("read addr=" TARGET_FMT_plx " val=0x%02x\n", addr, val);
  67
  68     return val;
  69 }
  70
  71 static uint32_t led_readw(void *opaque, target_phys_addr_t addr)
  72 {
  73     uint32_t v;
  74 #ifdef TARGET_WORDS_BIGENDIAN
  75     v = led_readb(opaque, addr) << 8;
  76     v |= led_readb(opaque, addr + 1);
  77 #else
  78     v = led_readb(opaque, addr);
  79     v |= led_readb(opaque, addr + 1) << 8;
  80 #endif
  81     return v;
  82 }
  83
  84 static uint32_t led_readl(void *opaque, target_phys_addr_t addr)
  85 {
  86     uint32_t v;
  87 #ifdef TARGET_WORDS_BIGENDIAN
  88     v = led_readb(opaque, addr) << 24;
  89     v |= led_readb(opaque, addr + 1) << 16;
  90     v |= led_readb(opaque, addr + 2) << 8;
  91     v |= led_readb(opaque, addr + 3);
  92 #else
  93     v = led_readb(opaque, addr);
  94     v |= led_readb(opaque, addr + 1) << 8;
  95     v |= led_readb(opaque, addr + 2) << 16;
  96     v |= led_readb(opaque, addr + 3) << 24;
  97 #endif
  98     return v;
  99 }
 100
 101 static void led_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
 102 {
 103     LedState *s = opaque;
 104
 105     DPRINTF("write addr=" TARGET_FMT_plx " val=0x%02x\n", addr, val);
 106
 107     switch (addr) {
 108         case 0:
 109             s->segments = val;
 110             s->state |= REDRAW_SEGMENTS;
 111             break;
 112         default:
 113             BADF("invalid write of 0x%08x at [" TARGET_FMT_plx "]\n", val, addr);
 114             break;
 115     }
 116 }
 117
 118 static void led_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
 119 {
 120 #ifdef TARGET_WORDS_BIGENDIAN
 121     led_writeb(opaque, addr, (val >> 8) & 0xff);
 122     led_writeb(opaque, addr + 1, val & 0xff);
 123 #else
 124     led_writeb(opaque, addr, val & 0xff);
 125     led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 126 #endif
 127 }
 128
 129 static void led_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 130 {
 131 #ifdef TARGET_WORDS_BIGENDIAN
 132     led_writeb(opaque, addr, (val >> 24) & 0xff);
 133     led_writeb(opaque, addr + 1, (val >> 16) & 0xff);
 134     led_writeb(opaque, addr + 2, (val >> 8) & 0xff);
 135     led_writeb(opaque, addr + 3, val & 0xff);
 136 #else
 137     led_writeb(opaque, addr, val & 0xff);
 138     led_writeb(opaque, addr + 1, (val >> 8) & 0xff);
 139     led_writeb(opaque, addr + 2, (val >> 16) & 0xff);
 140     led_writeb(opaque, addr + 3, (val >> 24) & 0xff);
 141 #endif
 142 }
 143
 144 static const MemoryRegionOps led_ops = {
 145     .old_mmio = {
 146         .read = { led_readb, led_readw, led_readl, },
 147         .write = { led_writeb, led_writew, led_writel, },
 148     },
 149     .endianness = DEVICE_NATIVE_ENDIAN,
 150 };
 151
 152 /***********************************************************/
 153 /* jazz_led display */
 154
 155 static void draw_horizontal_line(DisplayState *ds, int posy, int posx1, int posx2, uint32_t color)
 156 {
 157     uint8_t *d;
 158     int x, bpp;
 159
 160     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 161     d = ds_get_data(ds) + ds_get_linesize(ds) * posy + bpp * posx1;
 162     switch(bpp) {
 163         case 1:
 164             for (x = posx1; x <= posx2; x++) {
 165                 *((uint8_t *)d) = color;
 166                 d++;
 167             }
 168             break;
 169         case 2:
 170             for (x = posx1; x <= posx2; x++) {
 171                 *((uint16_t *)d) = color;
 172                 d += 2;
 173             }
 174             break;
 175         case 4:
 176             for (x = posx1; x <= posx2; x++) {
 177                 *((uint32_t *)d) = color;
 178                 d += 4;
 179             }
 180             break;
 181     }
 182 }
 183
 184 static void draw_vertical_line(DisplayState *ds, int posx, int posy1, int posy2, uint32_t color)
 185 {
 186     uint8_t *d;
 187     int y, bpp;
 188
 189     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 190     d = ds_get_data(ds) + ds_get_linesize(ds) * posy1 + bpp * posx;
 191     switch(bpp) {
 192         case 1:
 193             for (y = posy1; y <= posy2; y++) {
 194                 *((uint8_t *)d) = color;
 195                 d += ds_get_linesize(ds);
 196             }
 197             break;
 198         case 2:
 199             for (y = posy1; y <= posy2; y++) {
 200                 *((uint16_t *)d) = color;
 201                 d += ds_get_linesize(ds);
 202             }
 203             break;
 204         case 4:
 205             for (y = posy1; y <= posy2; y++) {
 206                 *((uint32_t *)d) = color;
 207                 d += ds_get_linesize(ds);
 208             }
 209             break;
 210     }
 211 }
 212
 213 static void jazz_led_update_display(void *opaque)
 214 {
 215     LedState *s = opaque;
 216     DisplayState *ds = s->ds;
 217     uint8_t *d1;
 218     uint32_t color_segment, color_led;
 219     int y, bpp;
 220
 221     if (s->state & REDRAW_BACKGROUND) {
 222         /* clear screen */
 223         bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
 224         d1 = ds_get_data(ds);
 225         for (y = 0; y < ds_get_height(ds); y++) {
 226             memset(d1, 0x00, ds_get_width(ds) * bpp);
 227             d1 += ds_get_linesize(ds);
 228         }
 229     }
 230
 231     if (s->state & REDRAW_SEGMENTS) {
 232         /* set colors according to bpp */
 233         switch (ds_get_bits_per_pixel(ds)) {
 234             case 8:
 235                 color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);
 236                 color_led = rgb_to_pixel8(0x00, 0xff, 0x00);
 237                 break;
 238             case 15:
 239                 color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);
 240                 color_led = rgb_to_pixel15(0x00, 0xff, 0x00);
 241                 break;
 242             case 16:
 243                 color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);
 244                 color_led = rgb_to_pixel16(0x00, 0xff, 0x00);
 245             case 24:
 246                 color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);
 247                 color_led = rgb_to_pixel24(0x00, 0xff, 0x00);
 248                 break;
 249             case 32:
 250                 color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);
 251                 color_led = rgb_to_pixel32(0x00, 0xff, 0x00);
 252                 break;
 253             default:
 254                 return;
 255         }
 256
 257         /* display segments */
 258         draw_horizontal_line(ds, 40, 10, 40, (s->segments & 0x02) ? color_segment : 0);
 259         draw_vertical_line(ds, 10, 10, 40, (s->segments & 0x04) ? color_segment : 0);
 260         draw_vertical_line(ds, 10, 40, 70, (s->segments & 0x08) ? color_segment : 0);
 261         draw_horizontal_line(ds, 70, 10, 40, (s->segments & 0x10) ? color_segment : 0);
 262         draw_vertical_line(ds, 40, 40, 70, (s->segments & 0x20) ? color_segment : 0);
 263         draw_vertical_line(ds, 40, 10, 40, (s->segments & 0x40) ? color_segment : 0);
 264         draw_horizontal_line(ds, 10, 10, 40, (s->segments & 0x80) ? color_segment : 0);
 265
 266         /* display led */
 267         if (!(s->segments & 0x01))
 268             color_led = 0; /* black */
 269         draw_horizontal_line(ds, 68, 50, 50, color_led);
 270         draw_horizontal_line(ds, 69, 49, 51, color_led);
 271         draw_horizontal_line(ds, 70, 48, 52, color_led);
 272         draw_horizontal_line(ds, 71, 49, 51, color_led);
 273         draw_horizontal_line(ds, 72, 50, 50, color_led);
 274     }
 275
 276     s->state = REDRAW_NONE;
 277     dpy_update(ds, 0, 0, ds_get_width(ds), ds_get_height(ds));
 278 }
 279
 280 static void jazz_led_invalidate_display(void *opaque)
 281 {
 282     LedState *s = opaque;
 283     s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 284 }
 285
 286 static void jazz_led_screen_dump(void *opaque, const char *filename)
 287 {
 288     printf("jazz_led_screen_dump() not implemented\n");
 289 }
 290
 291 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 292 {
 293     LedState *s = opaque;
 294     char buf[2];
 295
 296     dpy_cursor(s->ds, -1, -1);
 297     qemu_console_resize(s->ds, 2, 1);
 298
 299     /* TODO: draw the segments */
 300     snprintf(buf, 2, "%02hhx\n", s->segments);
 301     console_write_ch(chardata++, 0x00200100 | buf[0]);
 302     console_write_ch(chardata++, 0x00200100 | buf[1]);
 303
 304     dpy_update(s->ds, 0, 0, 2, 1);
 305 }
 306
 307 void jazz_led_init(MemoryRegion *address_space, target_phys_addr_t base)
 308 {
 309     LedState *s;
 310
 311     s = g_malloc0(sizeof(LedState));
 312
 313     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
 314
 315     memory_region_init_io(&s->iomem, &led_ops, s, "led", 1);
 316     memory_region_add_subregion(address_space, base, &s->iomem);
 317
 318     s->ds = graphic_console_init(jazz_led_update_display,
 319                                  jazz_led_invalidate_display,
 320                                  jazz_led_screen_dump,
 321                                  jazz_led_text_update, s);
 322     qemu_console_resize(s->ds, 60, 80);
 323 }