Annotation of qemu/hw/jazz_led.c, revision 1.1.1.1

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

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