1/* 2 * (C) Copyright 2008-2009 3 * BuS Elektronik GmbH & Co. KG <www.bus-elektronik.de> 4 * Jens Scharsig <esw@bus-elektronik.de> 5 * 6 * See file CREDITS for list of people who contributed to this 7 * project. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of 12 * the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 22 * MA 02111-1307 USA 23 */ 24 25U-Boot vcxk video controller driver 26====================================== 27 28By defining CONFIG_VIDEO_VCXK this driver can be used with VC2K, VC4K and 29VC8K devices on following boards: 30 31board | ARCH | Vendor 32----------------------------------------------------------------------- 33EB+CPU5282-T1 | MCF5282 | BuS Elektronik GmbH & Co. KG 34EB+MCF-EVB123 | MCF5282 | BuS Elektronik GmbH & Co. KG 35EB+CPUx9K2 | AT91RM9200 | BuS Elektronik GmbH & Co. KG 36ZLSA | AT91RM9200 | Ruf Telematik AG 37 38Driver configuration 39-------------------- 40 41The driver needs some defines to describe the target hardware: 42 43CONFIG_SYS_VCXK_BASE 44 45 base address of VCxK hardware memory 46 47CONFIG_SYS_VCXK_DEFAULT_LINEALIGN 48 49 defines the physical alignment of a pixel row 50 51CONFIG_SYS_VCXK_DOUBLEBUFFERED 52 53 some boards that use vcxk prevent read from framebuffer memory. 54 define this option to enable double buffering (needs 16KiB RAM) 55 56CONFIG_SYS_VCXK_<xxxx>_PIN 57 58 defines the number of the I/O line PIN in the port 59 valid values for <xxxx> are: 60 61 ACKNOWLEDGE 62 describes the acknowledge line from vcxk hardware 63 64 ENABLE 65 describes the enable line to vcxk hardware 66 67 INVERT 68 describes the invert line to vcxk hardware 69 70 RESET 71 describes the reset line to vcxk hardware 72 73 REQUEST 74 describes the request line to vcxk hardware 75 76CONFIG_SYS_VCXK_<xxxx>_PORT 77 78 defines the I/O port which is connected with the line 79 for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN 80 81CONFIG_SYS_VCXK_<xxxx>_DDR 82 83 defines the register which configures the direction 84 for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN 85