Start to add ATA support to barebox

Add the basic files, declarations and folders to bring in ATA support.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

drivers/Kconfig

@@ -6,6 +6,7 @@ source "drivers/spi/Kconfig"
 source "drivers/i2c/Kconfig"
 source "drivers/nor/Kconfig"
 source "drivers/nand/Kconfig"
+source "drivers/ata/Kconfig"
 source "drivers/usb/Kconfig"
 source "drivers/video/Kconfig"
 

drivers/Makefile

@@ -3,6 +3,7 @@ obj-y	+= serial/
 obj-y	+= nand/
 obj-y	+= nor/
 obj-y	+= usb/
+obj-$(CONFIG_ATA) += ata/
 obj-$(CONFIG_SPI) += spi/
 obj-$(CONFIG_I2C) += i2c/
 obj-$(CONFIG_VIDEO) += video/

drivers/ata/Kconfig

@@ -0,0 +1,12 @@
+menuconfig ATA
+	bool "ATA                           "
+	help
+	  Add support for ATA types of drives like harddisks and CDROMs.
+
+if ATA
+
+comment "drive types"
+
+comment "interface types"
+
+endif

drivers/ata/Makefile

@@ -0,0 +1,3 @@
+# drive types
+
+# interface types

include/ata.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2009 Juergen Beisert, Pengutronix
+ *
+ * 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
+ *
+ */
+
+/**
+ * @file
+ * @brief Declarations to communicate with ATA types of drives
+ */
+
+#include <types.h>
+#include <driver.h>
+
+/**
+ * Access functions from drives through the specified interface
+ */
+struct ata_interface {
+	/** write a count of sectors from a buffer to the drive */
+	int (*write)(struct device_d*, uint64_t, unsigned, const void*);
+	/** read a count of sectors from the drive into the buffer */
+	int (*read)(struct device_d*, uint64_t, unsigned, void*);
+	/** private interface data */
+	void *priv;
+};