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Annotation of Gnu-Mach/chips/cfb_hdw.c, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27:  *     File: cfb_hdw.c
        !            28:  *     Author: Alessandro Forin, Carnegie Mellon University
        !            29:  *     Date:   9/90
        !            30:  *
        !            31:  *     Driver for the 3max Color Frame Buffer Display,
        !            32:  *     hardware-level operations.
        !            33:  */
        !            34: 
        !            35: #include <cfb.h>
        !            36: #if    (NCFB > 0)
        !            37: 
        !            38: #include <platforms.h>
        !            39: 
        !            40: #include <machine/machspl.h>
        !            41: #include <mach/std_types.h>
        !            42: #include <chips/busses.h>
        !            43: #include <chips/screen_defs.h>
        !            44: #include <chips/pm_defs.h>
        !            45: 
        !            46: typedef pm_softc_t     cfb_softc_t;
        !            47: 
        !            48: #ifdef DECSTATION
        !            49: #include <mips/PMAX/pmag_ba.h>
        !            50: #include <mips/PMAX/tc.h>
        !            51: #endif
        !            52: 
        !            53: #ifdef FLAMINGO
        !            54: #include <mips/PMAX/pmag_ba.h>         /* XXX fixme */
        !            55: #include <alpha/DEC/tc.h>
        !            56: #endif
        !            57: 
        !            58: /*
        !            59:  * Definition of the driver for the auto-configuration program.
        !            60:  */
        !            61: 
        !            62: int    cfb_probe(), cfb_intr();
        !            63: static void    cfb_attach();
        !            64: 
        !            65: vm_offset_t    cfb_std[NCFB] = { 0 };
        !            66: struct bus_device *cfb_info[NCFB];
        !            67: struct bus_driver cfb_driver = 
        !            68:         { cfb_probe, 0, cfb_attach, 0, cfb_std, "cfb", cfb_info,
        !            69:          0, 0, BUS_INTR_DISABLED};
        !            70: 
        !            71: /*
        !            72:  * Probe/Attach functions
        !            73:  */
        !            74: 
        !            75: cfb_probe( /* reg, ui */)
        !            76: {
        !            77:        static probed_once = 0;
        !            78: 
        !            79:        /*
        !            80:         * Probing was really done sweeping the TC long ago
        !            81:         */
        !            82:        if (tc_probe("cfb") == 0)
        !            83:                return 0;
        !            84:        if (probed_once++ > 1)
        !            85:                printf("[mappable] ");
        !            86:        return 1;
        !            87: }
        !            88: 
        !            89: static void
        !            90: cfb_attach(ui)
        !            91:        struct bus_device *ui;
        !            92: {
        !            93:        /* ... */
        !            94:        printf(": color display");
        !            95: }
        !            96: 
        !            97: 
        !            98: /*
        !            99:  * Interrupt routine
        !           100:  */
        !           101: 
        !           102: cfb_intr(unit,spllevel)
        !           103:        spl_t   spllevel;
        !           104: {
        !           105:        register volatile char *ack;
        !           106: 
        !           107:        /* acknowledge interrupt */
        !           108:        ack = (volatile char *) cfb_info[unit]->address + CFB_OFFSET_IREQ;
        !           109:        *ack = 0;
        !           110: 
        !           111: #ifdef mips
        !           112:        splx(spllevel);
        !           113: #endif
        !           114:        lk201_led(unit);
        !           115: }
        !           116: 
        !           117: cfb_vretrace(cfb, on)
        !           118:        cfb_softc_t     *cfb;
        !           119: {
        !           120:        int i;
        !           121: 
        !           122:        for (i = 0; i < NCFB; i++)
        !           123:                if (cfb_info[i]->address == (vm_offset_t)cfb->framebuffer)
        !           124:                        break;
        !           125:        if (i == NCFB) return;
        !           126: 
        !           127:        (*tc_enable_interrupt)(cfb_info[i]->adaptor, on, 0);
        !           128: }
        !           129: 
        !           130: /*
        !           131:  * Boot time initialization: must make device
        !           132:  * usable as console asap.
        !           133:  */
        !           134: extern int
        !           135:        cfb_soft_reset(), cfb_set_status(),
        !           136:        bt459_pos_cursor(), bt459_video_on(),
        !           137:        bt459_video_off(), cfb_vretrace(),
        !           138:        pm_get_status(), pm_char_paint(),
        !           139:        pm_insert_line(), pm_remove_line(),
        !           140:        pm_clear_bitmap(), pm_map_page();
        !           141: 
        !           142: static struct screen_switch cfb_sw = {
        !           143:        screen_noop,            /* graphic_open */
        !           144:        cfb_soft_reset,         /* graphic_close */
        !           145:        cfb_set_status,         /* set_status */
        !           146:        pm_get_status,          /* get_status */
        !           147:        pm_char_paint,          /* char_paint */
        !           148:        bt459_pos_cursor,       /* pos_cursor */
        !           149:        pm_insert_line,         /* insert_line */
        !           150:        pm_remove_line,         /* remove_line */
        !           151:        pm_clear_bitmap,        /* clear_bitmap */
        !           152:        bt459_video_on,         /* video_on */
        !           153:        bt459_video_off,        /* video_off */
        !           154:        cfb_vretrace,           /* intr_enable */
        !           155:        pm_map_page             /* map_page */
        !           156: };
        !           157: 
        !           158: cfb_cold_init(unit, up)
        !           159:        user_info_t     *up;
        !           160: {
        !           161:        cfb_softc_t     *cfb;
        !           162:        screen_softc_t  sc = screen(unit);
        !           163:        int             base = tc_probe("cfb");
        !           164: 
        !           165:        bcopy(&cfb_sw, &sc->sw, sizeof(sc->sw));
        !           166:        sc->flags |= COLOR_SCREEN;
        !           167:        sc->frame_scanline_width = 1024;
        !           168:        sc->frame_height = 1024;
        !           169:        sc->frame_visible_width = 1024;
        !           170:        sc->frame_visible_height = 864;
        !           171: 
        !           172:        pm_init_screen_params(sc,up);
        !           173:        (void) screen_up(unit, up);
        !           174: 
        !           175:        cfb = pm_alloc(unit, base + CFB_OFFSET_BT459, base + CFB_OFFSET_VRAM, -1);
        !           176: 
        !           177:        screen_default_colors(up);
        !           178: 
        !           179:        cfb_soft_reset(sc);
        !           180: 
        !           181:        /*
        !           182:         * Clearing the screen at boot saves from scrolling
        !           183:         * much, and speeds up booting quite a bit.
        !           184:         */
        !           185:        screen_blitc( unit, 'C'-'@');/* clear screen */
        !           186: }
        !           187: 
        !           188: #endif (NCFB > 0)

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