new video driver for bus vcxk framebuffers
This patch adds a new video driver
* adds common bus_vcxk framebuffer driver
Signed-off-by: Jens Scharsig <esw@bus-elektronik.de>
[agust@denx.de: fixed lots of style issues before applying]
Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/doc/README.bus_vcxk b/doc/README.bus_vcxk
new file mode 100644
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--- /dev/null
+++ b/doc/README.bus_vcxk
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+/*
+ * (C) Copyright 2008-2009
+ * BuS Elektronik GmbH & Co. KG <www.bus-elektronik.de>
+ * Jens Scharsig <esw@bus-elektronik.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+U-Boot vcxk video controller driver
+======================================
+
+By defining CONFIG_VIDEO_VCXK this driver can be used with VC2K, VC4K and
+VC8K devices on following boards:
+
+board | ARCH | Vendor
+-----------------------------------------------------------------------
+EB+CPU5282-T1 | MCF5282 | BuS Elektronik GmbH & Co. KG
+EB+MCF-EVB123 | MCF5282 | BuS Elektronik GmbH & Co. KG
+EB+CPUx9K2 | AT91RM9200 | BuS Elektronik GmbH & Co. KG
+ZLSA | AT91RM9200 | Ruf Telematik AG
+
+Driver configuration
+--------------------
+
+The driver needs some defines to describe the target hardware:
+
+CONFIG_SYS_VCXK_BASE
+
+ base address of VCxK hardware memory
+
+CONFIG_SYS_VCXK_DEFAULT_LINEALIGN
+
+ defines the physical alignment of a pixel row
+
+CONFIG_SYS_VCXK_DOUBLEBUFFERED
+
+ some boards that use vcxk prevent read from framebuffer memory.
+ define this option to enable double buffering (needs 16KiB RAM)
+
+CONFIG_SYS_VCXK_<xxxx>_PIN
+
+ defines the number of the I/O line PIN in the port
+ valid values for <xxxx> are:
+
+ ACKNOWLEDGE
+ describes the acknowledge line from vcxk hardware
+
+ ENABLE
+ describes the enable line to vcxk hardware
+
+ INVERT
+ describes the invert line to vcxk hardware
+
+ RESET
+ describes the reset line to vcxk hardware
+
+ REQUEST
+ describes the request line to vcxk hardware
+
+CONFIG_SYS_VCXK_<xxxx>_PORT
+
+ defines the I/O port which is connected with the line
+ for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN
+
+CONFIG_SYS_VCXK_<xxxx>_DDR
+
+ defines the register which configures the direction
+ for valid values for <xxxx> see CONFIG_SYS_VCXK_<xxxx>_PIN
+