diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/raspberrypi/console/fb.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/raspberrypi/console/fb.c | 437 |
1 files changed, 0 insertions, 437 deletions
diff --git a/c/src/lib/libbsp/arm/raspberrypi/console/fb.c b/c/src/lib/libbsp/arm/raspberrypi/console/fb.c deleted file mode 100644 index 815d17e8ca..0000000000 --- a/c/src/lib/libbsp/arm/raspberrypi/console/fb.c +++ /dev/null @@ -1,437 +0,0 @@ -/** - * @file - * - * @ingroup raspberrypi - * - * @brief framebuffer support. - */ - -/* - * Copyright (c) 2015 Yang Qiao - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * - * http://www.rtems.org/license/LICENSE - * - */ - -#include <stdlib.h> -#include <string.h> -#include <stdio.h> -#include <errno.h> -#include <sys/types.h> - -#include <bsp.h> -#include <bsp/raspberrypi.h> -#include <bsp/mailbox.h> -#include <bsp/vc.h> -#include <bsp/rpi-fb.h> - -#include <libcpu/arm-cp15.h> - -#include <rtems.h> -#include <rtems/libio.h> -#include <rtems/fb.h> -#include <rtems/framebuffer.h> -#include <rtems/score/atomic.h> -#include <rtems/bspIo.h> - -#define SCREEN_WIDTH 1024 -#define SCREEN_HEIGHT 768 -#define BPP 32 - -/* flag to limit driver to protect against multiple opens */ -static Atomic_Flag driver_mutex; - -/* - * screen information for the driver (fb0). - */ - -static struct fb_var_screeninfo fb_var_info = { - .xres = SCREEN_WIDTH, - .yres = SCREEN_HEIGHT, - .bits_per_pixel = BPP -}; - -static struct fb_fix_screeninfo fb_fix_info = { - .smem_start = (void *) NULL, - .smem_len = 0, - .type = FB_TYPE_PACKED_PIXELS, - .visual = FB_VISUAL_TRUECOLOR, - .line_length = 0 -}; - -typedef enum { - NO_SUITABLE_MODE = -1, - BAD_FORMAT = -2, - AUTO_SELECT = -3, - DONT_INIT = -4, - NO_MODE_REQ = -5, -} mode_err_ret_val; - -int rpi_get_fix_screen_info( struct fb_fix_screeninfo *info ) -{ - *info = fb_fix_info; - return 0; -} - -int rpi_get_var_screen_info( struct fb_var_screeninfo *info ) -{ - *info = fb_var_info; - return 0; -} - -/** - * @brief Find mode given in string format. - * - * expected format - * <resX>x<resY>[-<bpp>] - * numbers <resX>, <resY> and <bpp> are decadic - * - * @param[out] fb_var_ptr pointer to variable mode part filled by function - * @param[in] video_string string to be parsed - * @retval video mode number to be set - * @retval -1 no suitable mode found - * @retval -2 bad format of the video_string - * @retval -3 automatic mode selection requested - * @retval -4 request to not initialize graphics - * @retval -5 no mode requested/empty video string - */ - -static int parse_mode_from_string( - struct fb_var_screeninfo *fb_var_ptr, - const char *video_string -) -{ - const char *opt; - char *endptr; - uint32_t width; - uint32_t height; - uint32_t bpp = 0; - - opt = video_string; - - if ( opt == NULL ) - return NO_MODE_REQ; - - if ( strncmp( opt, "auto", 4 ) == 0 ) - return AUTO_SELECT; - - if ( strncmp( opt, "none", 4 ) == 0 || - strncmp( opt, "off", 3 ) == 0 ) - return DONT_INIT; - - width = strtol( opt, &endptr, 10 ); - - if ( *endptr != 'x' ) { - return BAD_FORMAT; - } - - opt = endptr + 1; - height = strtol( opt, &endptr, 10 ); - - switch ( *endptr ) { - case '-': - opt = endptr + 1; - endptr = NULL; - bpp = strtol( opt, &endptr, 10 ); - - if ( ( endptr == opt ) || ( endptr == NULL ) ) - return BAD_FORMAT; - - if ( *endptr && ( *endptr != ' ' ) ) - return BAD_FORMAT; - - break; - case ' ': - case 0: - break; - default: - return BAD_FORMAT; - } - - fb_var_ptr->xres = width; - fb_var_ptr->yres = height; - - if ( bpp != 0 ) - fb_var_ptr->bits_per_pixel = bpp; - - return 0; -} - -static int find_mode_from_vc( void ) -{ - int res; - unsigned int width; - unsigned int height; - bcm2835_get_display_size_entries entries; - - res = bcm2835_mailbox_get_display_size( &entries ); - - width = entries.width; - height = entries.height; - - if ( width == 0 || height == 0 ) { - fb_var_info.xres = SCREEN_WIDTH; - fb_var_info.yres = SCREEN_HEIGHT; - } else { - fb_var_info.xres = width; - fb_var_info.yres = height; - } - printk("find_mode_from_vc %u x %u, res %d\n", width, height, res); - - return res; -} - -bool rpi_fb_hdmi_is_present( void ) -{ - bcm2835_get_display_size_entries entries; - - memset( &entries, 0, sizeof( entries ) ); - bcm2835_mailbox_get_display_size( &entries ); - - /* Impossible display dimension */ - if ( ( entries.width < 10 ) || ( entries.height < 10 ) ) - return false; - - /* Know default values reported when monitor is not present */ - if ( ( entries.width == 0x290 ) && ( entries.height == 0x1A0 ) ) - return false; - - return true; -} - -int rpi_fb_init( void ) -{ - int res; - int mode_from_cmdline; - bcm2835_init_frame_buffer_entries init_frame_buffer_entries; - - if ( fb_fix_info.smem_start != NULL ) { - return RPI_FB_INIT_ALREADY_INITIALIZED; - } - - if ( rpi_fb_hdmi_is_present() == false ) { - return RPI_FB_INIT_NO_DISPLAY; - } - - mode_from_cmdline = parse_mode_from_string( &fb_var_info, - rpi_cmdline_get_arg( "--video=" ) ); - - switch ( mode_from_cmdline ) { - case BAD_FORMAT: - return RPI_FB_INIT_CMDLINE_BAD_FORMAT; - case AUTO_SELECT: - break; - case DONT_INIT: - return RPI_FB_INIT_CMDLINE_DONT_INIT; - case NO_MODE_REQ: - return RPI_FB_INIT_CMDLINE_NO_MODE_REQ; - } - - if ( mode_from_cmdline ) { - if ( find_mode_from_vc() ) - return RPI_FB_INIT_MODE_PROBE_ERROR; - } - - memset( &init_frame_buffer_entries, 0, sizeof( init_frame_buffer_entries ) ); - init_frame_buffer_entries.xres = fb_var_info.xres; - init_frame_buffer_entries.yres = fb_var_info.yres; - init_frame_buffer_entries.xvirt = fb_var_info.xres; - init_frame_buffer_entries.yvirt = fb_var_info.yres; - init_frame_buffer_entries.depth = fb_var_info.bits_per_pixel; - init_frame_buffer_entries.pixel_order = bcm2835_mailbox_pixel_order_rgb; - init_frame_buffer_entries.alpha_mode = bcm2835_mailbox_alpha_mode_0_opaque; - init_frame_buffer_entries.voffset_x = 0; - init_frame_buffer_entries.voffset_y = 0; - init_frame_buffer_entries.overscan_left = 0; - init_frame_buffer_entries.overscan_right = 0; - init_frame_buffer_entries.overscan_top = 0; - init_frame_buffer_entries.overscan_bottom = 0; - printk("bcm2835_mailbox_init_frame_buffer ...\n"); - res = bcm2835_mailbox_init_frame_buffer( &init_frame_buffer_entries ); - printk("bcm2835_mailbox_init_frame_buffer returned %d\n", res); - if (res != 0) { - printk("bcm2835_mailbox_init_frame_buffer retry ...\n"); - res = bcm2835_mailbox_init_frame_buffer( &init_frame_buffer_entries ); - printk("bcm2835_mailbox_init_frame_buffer returned %d\n", res); - if (res != 0) - return RPI_FB_INIT_SETUP_FAILED; - } - - bcm2835_get_pitch_entries get_pitch_entries; - bcm2835_mailbox_get_pitch( &get_pitch_entries ); - - fb_var_info.xres = init_frame_buffer_entries.xres; - fb_var_info.yres = init_frame_buffer_entries.yres; - fb_var_info.bits_per_pixel = init_frame_buffer_entries.depth; - fb_fix_info.smem_start = (void *) init_frame_buffer_entries.base; - fb_fix_info.smem_len = init_frame_buffer_entries.size; - fb_fix_info.line_length = get_pitch_entries.pitch; - - if ( fb_fix_info.smem_start == NULL ) - return RPI_FB_INIT_START_ADDR_UNKNOWN; - - printk("fb_fix_info.smem_start %p\n", fb_fix_info.smem_start); - - arm_cp15_set_translation_table_entries( (void *) fb_fix_info.smem_start, - (void *) fb_fix_info.smem_start + - fb_fix_info.smem_len, - ARMV7_MMU_DATA_READ_WRITE_CACHED ); - - return RPI_FB_INIT_OK; -} - -/* - * fbds device driver initialize entry point. - */ - -rtems_device_driver frame_buffer_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg -) -{ - rtems_status_code status; - - /* register the devices */ - status = rtems_io_register_name( FRAMEBUFFER_DEVICE_0_NAME, major, 0 ); - - if ( status != RTEMS_SUCCESSFUL ) { - printk( "[!] error registering framebuffer\n" ); - rtems_fatal_error_occurred( status ); - } - - _Atomic_Flag_clear( &driver_mutex, ATOMIC_ORDER_RELEASE ); - return RTEMS_SUCCESSFUL; -} - -/* - * fbds device driver open operation. - */ - -rtems_device_driver frame_buffer_open( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg -) -{ - if ( _Atomic_Flag_test_and_set( &driver_mutex, - ATOMIC_ORDER_ACQUIRE ) != 0 ) { - printk( "RaspberryPi framebuffer could not lock driver_mutex\n" ); - return RTEMS_UNSATISFIED; - } - - if ( fb_fix_info.smem_start == NULL ) { - int res; - res = rpi_fb_init(); - if ( (res < RPI_FB_INIT_OK) || (fb_fix_info.smem_start == NULL) ) { - _Atomic_Flag_clear( &driver_mutex, ATOMIC_ORDER_RELEASE ); - printk( "RaspberryPi framebuffer initialization failed\n" ); - return RTEMS_UNSATISFIED; - } - } - - memset( (void *) fb_fix_info.smem_start, 0, fb_fix_info.smem_len ); - return RTEMS_SUCCESSFUL; -} - -/* - * fbds device driver close operation. - */ - -rtems_device_driver frame_buffer_close( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg -) -{ - /* restore previous state. for VGA this means return to text mode. - * leave out if graphics hardware has been initialized in - * frame_buffer_initialize() */ - memset( (void *) fb_fix_info.smem_start, 0, fb_fix_info.smem_len ); - _Atomic_Flag_clear( &driver_mutex, ATOMIC_ORDER_RELEASE ); - return RTEMS_SUCCESSFUL; -} - -/* - * fbds device driver read operation. - */ - -rtems_device_driver frame_buffer_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; - - rw_args->bytes_moved = - ( ( rw_args->offset + rw_args->count ) > fb_fix_info.smem_len ) ? - ( fb_fix_info.smem_len - rw_args->offset ) : rw_args->count; - memcpy( rw_args->buffer, - (const void *) ( fb_fix_info.smem_start + rw_args->offset ), - rw_args->bytes_moved ); - return RTEMS_SUCCESSFUL; -} - -/* - * fbds device driver write operation. - */ - -rtems_device_driver frame_buffer_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; - - rw_args->bytes_moved = - ( ( rw_args->offset + rw_args->count ) > fb_fix_info.smem_len ) ? - ( fb_fix_info.smem_len - rw_args->offset ) : rw_args->count; - memcpy( (void *) ( fb_fix_info.smem_start + rw_args->offset ), - rw_args->buffer, - rw_args->bytes_moved ); - return RTEMS_SUCCESSFUL; -} - -/* - * ioctl entry point. - */ - -rtems_device_driver frame_buffer_control( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *arg -) -{ - rtems_libio_ioctl_args_t *args = arg; - - /* XXX check minor */ - - switch ( args->command ) { - case FBIOGET_VSCREENINFO: - memcpy( args->buffer, &fb_var_info, sizeof( fb_var_info ) ); - args->ioctl_return = 0; - break; - case FBIOGET_FSCREENINFO: - memcpy( args->buffer, &fb_fix_info, sizeof( fb_fix_info ) ); - args->ioctl_return = 0; - break; - case FBIOGETCMAP: - /* no palette - truecolor mode */ - args->ioctl_return = -1; - return RTEMS_UNSATISFIED; - case FBIOPUTCMAP: - /* no palette - truecolor mode */ - args->ioctl_return = -1; - return RTEMS_UNSATISFIED; - default: - args->ioctl_return = -1; - return RTEMS_UNSATISFIED; - } - - return RTEMS_SUCCESSFUL; -} |