Annotation of qemu/hw/jazz_led.c, revision 1.1.1.4

1.1       root        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: 
1.1.1.2   root       47:     switch (addr) {
1.1       root       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: 
1.1.1.2   root       95:     switch (addr) {
1.1       root       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: 
1.1.1.4 ! root      134: static CPUReadMemoryFunc * const led_read[3] = {
1.1       root      135:     led_readb,
                    136:     led_readw,
                    137:     led_readl,
                    138: };
                    139: 
1.1.1.4 ! root      140: static CPUWriteMemoryFunc * const led_write[3] = {
1.1       root      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: 
1.1.1.2   root      154:     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
                    155:     d = ds_get_data(ds) + ds_get_linesize(ds) * posy + bpp * posx1;
1.1       root      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: 
1.1.1.2   root      183:     bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;
                    184:     d = ds_get_data(ds) + ds_get_linesize(ds) * posy1 + bpp * posx;
1.1       root      185:     switch(bpp) {
                    186:         case 1:
                    187:             for (y = posy1; y <= posy2; y++) {
                    188:                 *((uint8_t *)d) = color;
1.1.1.2   root      189:                 d += ds_get_linesize(ds);
1.1       root      190:             }
                    191:             break;
                    192:         case 2:
                    193:             for (y = posy1; y <= posy2; y++) {
                    194:                 *((uint16_t *)d) = color;
1.1.1.2   root      195:                 d += ds_get_linesize(ds);
1.1       root      196:             }
                    197:             break;
                    198:         case 4:
                    199:             for (y = posy1; y <= posy2; y++) {
                    200:                 *((uint32_t *)d) = color;
1.1.1.2   root      201:                 d += ds_get_linesize(ds);
1.1       root      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 */
1.1.1.2   root      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);
1.1       root      222:         }
                    223:     }
                    224: 
                    225:     if (s->state & REDRAW_SEGMENTS) {
                    226:         /* set colors according to bpp */
1.1.1.2   root      227:         switch (ds_get_bits_per_pixel(ds)) {
1.1       root      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;
1.1.1.2   root      271:     dpy_update(ds, 0, 0, ds_get_width(ds), ds_get_height(ds));
1.1       root      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: 
1.1.1.2   root      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)
1.1       root      302: {
                    303:     LedState *s;
                    304:     int io;
                    305: 
                    306:     s = qemu_mallocz(sizeof(LedState));
                    307: 
                    308:     s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;
                    309: 
1.1.1.3   root      310:     io = cpu_register_io_memory(led_read, led_write, s);
1.1.1.2   root      311:     cpu_register_physical_memory(base, 1, io);
1.1       root      312: 
1.1.1.2   root      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);
1.1       root      318: }

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