| Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | SPDX-License-Identifier: GPL-2.0+ |
| Jens Scharsig | 5fe7c6b | 2009-07-24 10:09:02 +0200 | [diff] [blame] | 2 | /* |
| 3 | * (C) Copyright 2008-2009 |
| 4 | * BuS Elektronik GmbH & Co. KG <www.bus-elektronik.de> |
| 5 | * Jens Scharsig <esw@bus-elektronik.de> |
| Jens Scharsig | 5fe7c6b | 2009-07-24 10:09:02 +0200 | [diff] [blame] | 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 |