diff options
Diffstat (limited to 'c/src/lib/libbsp/i386/pc386/console/fb_vga.c')
| -rw-r--r-- | c/src/lib/libbsp/i386/pc386/console/fb_vga.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/pc386/console/fb_vga.c b/c/src/lib/libbsp/i386/pc386/console/fb_vga.c new file mode 100644 index 0000000000..29b840f728 --- /dev/null +++ b/c/src/lib/libbsp/i386/pc386/console/fb_vga.c @@ -0,0 +1,245 @@ +/* +///////////////////////////////////////////////////////////////////////////// +// $Header$ +// +// Copyright (c) 2000 - Rosimildo da Silva ( rdasilva@connecttel.com ) +// +// MODULE DESCRIPTION: +// This module implements the micro FB driver for "Bare VGA". It uses the +// routines for "bare hardware" that comes with MicroWindows. +// +// MODIFICATION/HISTORY: +// +// $Log$ +// +///////////////////////////////////////////////////////////////////////////// +*/ + +#include <stdlib.h> +#include <stdio.h> +#include <errno.h> +#include <sys/types.h> + +#include <bsp.h> +#include <irq.h> +#include <rtems/libio.h> + +#include <rtems/mw_fb.h> + +/* these routines are defined in the microwindows code. This + driver is here more as an example of how to implement and + use the micro FB interface +*/ +extern void ega_hwinit( void ); +extern void ega_hwterm( void ); + + +/* screen information for the VGA driver */ +static struct fb_screeninfo fb_info = +{ + 640, 480, /* screen size x, y */ + 4, /* bits per pixel */ + 80, /* chars per line */ + (volatile char *)0xA0000, /* buffer pointer */ + 0x10000, /* buffer size */ + FB_TYPE_VGA_PLANES, /* type of dsplay */ + FB_VISUAL_PSEUDOCOLOR /* color scheme used */ +}; + + +static __u16 red16[] = { + 0x0000, 0x0000, 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0xaaaa, 0xaaaa, + 0x5555, 0x5555, 0x5555, 0x5555, 0xffff, 0xffff, 0xffff, 0xffff +}; +static __u16 green16[] = { + 0x0000, 0x0000, 0xaaaa, 0xaaaa, 0x0000, 0x0000, 0x5555, 0xaaaa, + 0x5555, 0x5555, 0xffff, 0xffff, 0x5555, 0x5555, 0xffff, 0xffff +}; +static __u16 blue16[] = { + 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa, 0x0000, 0xaaaa, + 0x5555, 0xffff, 0x5555, 0xffff, 0x5555, 0xffff, 0x5555, 0xffff +}; + +/* + * fbvga device driver INITIALIZE entry point. + */ +rtems_device_driver +fbvga_initialize( rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg) +{ + rtems_status_code status; + + printk( "FBVGA -- driver initializing..\n" ); + /* + * Register the device + */ + status = rtems_io_register_name ("/dev/fb0", major, 0); + if (status != RTEMS_SUCCESSFUL) + { + printk("Error registering FBVGA device!\n"); + rtems_fatal_error_occurred( status ); + } + return RTEMS_SUCCESSFUL; +} + + +/* + * fbvga device driver OPEN entry point + */ +rtems_device_driver +fbvga_open( rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg) +{ +/* rtems_status_code status; */ + printk( "FBVGA open called.\n" ); + return RTEMS_SUCCESSFUL; +} + +/* + * fbvga device driver CLOSE entry point + */ +rtems_device_driver +fbvga_close(rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg) +{ + printk( "FBVGA close called.\n" ); + return RTEMS_SUCCESSFUL; +} + + +/* + * fbvga device driver READ entry point. + * Read characters from the PS/2 mouse. + */ +rtems_device_driver +fbvga_read( rtems_device_major_number major, + rtems_device_minor_number minor, + void *arg) +{ + rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg; + printk( "FBVGA read called.\n" ); + rw_args->bytes_moved = 0; + return RTEMS_SUCCESSFUL; +} + + +/* + * fbvga device driver WRITE entry point. + * Write characters to the PS/2 mouse. + */ +rtems_device_driver +fbvga_write( rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg) +{ + rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg; + printk( "FBVGA write called.\n" ); + rw_args->bytes_moved = 0; + return RTEMS_SUCCESSFUL; +} + + +static int get_screen_info( struct fb_screeninfo *info ) +{ + *info = fb_info; + return 0; +} + + +static int get_palette( struct fb_cmap *cmap ) +{ + __u32 i; + + if( cmap->start + cmap->len >= 16 ) + return 1; + + for( i = 0; i < cmap->len; i++ ) + { + cmap->red[ cmap->start + i ] = red16[ cmap->start + i ]; + cmap->green[ cmap->start + i ] = green16[ cmap->start + i ]; + cmap->blue[ cmap->start + i ] = blue16[ cmap->start + i ]; + } + return 0; +} + + +static int set_palette( struct fb_cmap *cmap ) +{ + __u32 i; + + if( cmap->start + cmap->len >= 16 ) + return 1; + + for( i = 0; i < cmap->len; i++ ) + { + red16[ cmap->start + i ] = cmap->red[ cmap->start + i ]; + green16[ cmap->start + i ] = cmap->green[ cmap->start + i ]; + blue16[ cmap->start + i ] = cmap->blue[ cmap->start + i ]; + } + return 0; +} + + +/* + * IOCTL entry point -- This method is called to carry + * all services of this interface. + */ +rtems_device_driver +fbvga_control( rtems_device_major_number major, + rtems_device_minor_number minor, + void * arg +) +{ + rtems_libio_ioctl_args_t *args = arg; + printk( "FBVGA ioctl called, cmd=%x\n", args->command ); + switch( args->command ) + { + case FB_SCREENINFO: + args->ioctl_return = get_screen_info( args->buffer ); + break; + case FB_GETPALETTE: + args->ioctl_return = get_palette( args->buffer ); + break; + case FB_SETPALETTE: + args->ioctl_return = set_palette( args->buffer ); + break; + + /* this function would execute one of the routines of the + * interface based on the operation requested + */ + case FB_EXEC_FUNCTION: + { + struct fb_exec_function *env = args->buffer; + switch( env->func_no ) + { + case FB_FUNC_ENTER_GRAPHICS: + /* enter graphics mode*/ + ega_hwinit(); + break; + + case FB_FUNC_EXIT_GRAPHICS: + /* leave graphics mode*/ + ega_hwterm(); + break; + + case FB_FUNC_IS_DIRTY: + break; + + case FB_FUNC_GET_MODE: + break; + + default: + break; + } + } + /* no break on purpose */ + default: + args->ioctl_return = 0; + break; + + } + return RTEMS_SUCCESSFUL; +} |