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Diffstat (limited to 'chips/cfb_hdw.c')
| -rw-r--r-- | chips/cfb_hdw.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/chips/cfb_hdw.c b/chips/cfb_hdw.c new file mode 100644 index 0000000..78764aa --- /dev/null +++ b/chips/cfb_hdw.c @@ -0,0 +1,188 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * File: cfb_hdw.c + * Author: Alessandro Forin, Carnegie Mellon University + * Date: 9/90 + * + * Driver for the 3max Color Frame Buffer Display, + * hardware-level operations. + */ + +#include <cfb.h> +#if (NCFB > 0) + +#include <platforms.h> + +#include <machine/machspl.h> +#include <mach/std_types.h> +#include <chips/busses.h> +#include <chips/screen_defs.h> +#include <chips/pm_defs.h> + +typedef pm_softc_t cfb_softc_t; + +#ifdef DECSTATION +#include <mips/PMAX/pmag_ba.h> +#include <mips/PMAX/tc.h> +#endif + +#ifdef FLAMINGO +#include <mips/PMAX/pmag_ba.h> /* XXX fixme */ +#include <alpha/DEC/tc.h> +#endif + +/* + * Definition of the driver for the auto-configuration program. + */ + +int cfb_probe(), cfb_intr(); +static void cfb_attach(); + +vm_offset_t cfb_std[NCFB] = { 0 }; +struct bus_device *cfb_info[NCFB]; +struct bus_driver cfb_driver = + { cfb_probe, 0, cfb_attach, 0, cfb_std, "cfb", cfb_info, + 0, 0, BUS_INTR_DISABLED}; + +/* + * Probe/Attach functions + */ + +cfb_probe( /* reg, ui */) +{ + static probed_once = 0; + + /* + * Probing was really done sweeping the TC long ago + */ + if (tc_probe("cfb") == 0) + return 0; + if (probed_once++ > 1) + printf("[mappable] "); + return 1; +} + +static void +cfb_attach(ui) + struct bus_device *ui; +{ + /* ... */ + printf(": color display"); +} + + +/* + * Interrupt routine + */ + +cfb_intr(unit,spllevel) + spl_t spllevel; +{ + register volatile char *ack; + + /* acknowledge interrupt */ + ack = (volatile char *) cfb_info[unit]->address + CFB_OFFSET_IREQ; + *ack = 0; + +#ifdef mips + splx(spllevel); +#endif + lk201_led(unit); +} + +cfb_vretrace(cfb, on) + cfb_softc_t *cfb; +{ + int i; + + for (i = 0; i < NCFB; i++) + if (cfb_info[i]->address == (vm_offset_t)cfb->framebuffer) + break; + if (i == NCFB) return; + + (*tc_enable_interrupt)(cfb_info[i]->adaptor, on, 0); +} + +/* + * Boot time initialization: must make device + * usable as console asap. + */ +extern int + cfb_soft_reset(), cfb_set_status(), + bt459_pos_cursor(), bt459_video_on(), + bt459_video_off(), cfb_vretrace(), + pm_get_status(), pm_char_paint(), + pm_insert_line(), pm_remove_line(), + pm_clear_bitmap(), pm_map_page(); + +static struct screen_switch cfb_sw = { + screen_noop, /* graphic_open */ + cfb_soft_reset, /* graphic_close */ + cfb_set_status, /* set_status */ + pm_get_status, /* get_status */ + pm_char_paint, /* char_paint */ + bt459_pos_cursor, /* pos_cursor */ + pm_insert_line, /* insert_line */ + pm_remove_line, /* remove_line */ + pm_clear_bitmap, /* clear_bitmap */ + bt459_video_on, /* video_on */ + bt459_video_off, /* video_off */ + cfb_vretrace, /* intr_enable */ + pm_map_page /* map_page */ +}; + +cfb_cold_init(unit, up) + user_info_t *up; +{ + cfb_softc_t *cfb; + screen_softc_t sc = screen(unit); + int base = tc_probe("cfb"); + + bcopy(&cfb_sw, &sc->sw, sizeof(sc->sw)); + sc->flags |= COLOR_SCREEN; + sc->frame_scanline_width = 1024; + sc->frame_height = 1024; + sc->frame_visible_width = 1024; + sc->frame_visible_height = 864; + + pm_init_screen_params(sc,up); + (void) screen_up(unit, up); + + cfb = pm_alloc(unit, base + CFB_OFFSET_BT459, base + CFB_OFFSET_VRAM, -1); + + screen_default_colors(up); + + cfb_soft_reset(sc); + + /* + * Clearing the screen at boot saves from scrolling + * much, and speeds up booting quite a bit. + */ + screen_blitc( unit, 'C'-'@');/* clear screen */ +} + +#endif (NCFB > 0) |