1 /* 2 * Ben NanoNote LCD initialisation, based on uboot-xburst and xburst-tools. 3 * 4 * Copyright (C) 2015 Paul Boddie <paul@boddie.org.uk> 5 * Copyright (C) 2001-2002 Wolfgang Denk, DENX Software Engineering, <wd@denx.de> 6 * 7 * This program is free software; you can redistribute it and/or modify it under 8 * the terms of the GNU General Public License as published by the Free Software 9 * Foundation; either version 3 of the License, or (at your option) any later 10 * version. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 14 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 15 * details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program. If not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "xburst_types.h" 22 #include "nanonote_gpm940b0.h" 23 #include "board-nanonote.h" 24 25 #define ALIGN(x,a) __ALIGN_MASK((x),(typeof(x))(a)-1) 26 #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) 27 28 unsigned long lcd_setmem(unsigned long addr) 29 { 30 unsigned long size; 31 32 size = lcd_get_size(); 33 34 /* Round up to nearest full page, or MMU section if defined */ 35 size = ALIGN(size, PAGE_SIZE); 36 addr = ALIGN(addr - PAGE_SIZE + 1, PAGE_SIZE); 37 38 /* Allocate pages for the frame buffer. */ 39 addr -= size; 40 41 return addr; 42 } 43 44 static void test_pattern(void *lcd_base) 45 { 46 unsigned short v_max = panel_info.vl_row; 47 unsigned short h_max = panel_info.vl_col; 48 unsigned short v, h; 49 u32 *pix = (u32 *)lcd_base; 50 51 /* WARNING: Code silently assumes 32 bit/pixel */ 52 for (v = 0; v < v_max; v += 1) { 53 for (h = 0; h < h_max; h += 1) { 54 *pix++ = ( 55 (((255 * (h_max - h)) / (h_max - 1)) << 16) + 56 ((((255 * h) / (h_max - 1) + (255 * (v_max - v)) / (v_max - 1)) / 2) << 8) + 57 ((255 * v) / (v_max - 1)) 58 ); 59 } 60 } 61 } 62 63 void lcd_clear(void *lcd_base) 64 { 65 test_pattern(lcd_base); 66 } 67 68 /* LCD initialisation. */ 69 70 static void *lcd_base; 71 72 void lcd_init(void) 73 { 74 __lcd_display_pin_init(); 75 __lcd_display_on(); 76 77 /* Start from the top of memory and obtain a framebuffer region. */ 78 79 lcd_base = (void *) lcd_setmem(get_memory_size()); 80 lcd_ctrl_init(lcd_base); 81 lcd_clear(lcd_base); 82 lcd_enable(); 83 }