1 SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2008-2009 4 * BuS Elektronik GmbH & Co. KG <www.bus-elektronik.de> 5 * Jens Scharsig <esw (a] bus-elektronik.de> 6 */ 7 8 U-Boot vcxk video controller driver 9 ====================================== 10 11 By defining CONFIG_VIDEO_VCXK this driver can be used with VC2K, VC4K and 12 VC8K devices on following boards: 13 14 board | ARCH | Vendor 15 ----------------------------------------------------------------------- 16 EB+CPU5282-T1 | MCF5282 | BuS Elektronik GmbH & Co. KG 17 EB+MCF-EVB123 | MCF5282 | BuS Elektronik GmbH & Co. KG 18 EB+CPUx9K2 | AT91RM9200 | BuS Elektronik GmbH & Co. KG 19 ZLSA | AT91RM9200 | Ruf Telematik AG 20 21 Driver configuration 22 -------------------- 23 24 The driver needs some defines to describe the target hardware: 25 26 CONFIG_SYS_VCXK_BASE 27 28 base address of VCxK hardware memory 29 30 CONFIG_SYS_VCXK_DEFAULT_LINEALIGN 31 32 defines the physical alignment of a pixel row 33 34 CONFIG_SYS_VCXK_DOUBLEBUFFERED 35 36 some boards that use vcxk prevent read from framebuffer memory. 37 define this option to enable double buffering (needs 16KiB RAM) 38 39 CONFIG_SYS_VCXK_<xxxx>_PIN 40 41 defines the number of the I/O line PIN in the port 42 valid values for <xxxx> are: 43 44 ACKNOWLEDGE 45 describes the acknowledge line from vcxk hardware 46 47 ENABLE 48 describes the enable line to vcxk hardware 49 50 INVERT 51 describes the invert line to vcxk hardware 52 53 RESET 54 describes the reset line to vcxk hardware 55 56 REQUEST 57 describes the request line to vcxk hardware 58 59 CONFIG_SYS_VCXK_<xxxx>_PORT 60 61 defines the I/O port which is connected with the line 62 for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN 63 64 CONFIG_SYS_VCXK_<xxxx>_DDR 65 66 defines the register which configures the direction 67 for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN 68
