Annotation of qemu/hw/jazz_led.c, revision 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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