add 'nonce' nand driver

The nonce NAND driver provides a no-op implementation useful for
testing the system independently of any driver side-effects.

src/flash/Makefile.am

@@ -44,6 +44,7 @@ NAND_SRCS = \
 	nand.c
 
 NAND_DEVICES_SRCS = \
+	nonce_nand.c \
 	davinci_nand.c \
 	lpc3180_nand_controller.c \
 	mx3_nand.c \

src/flash/nand.c

@@ -36,6 +36,7 @@ static int nand_write_page(struct nand_device *nand, uint32_t page, uint8_t *dat
 
 /* NAND flash controller
  */
+extern struct nand_flash_controller nonce_nand_controller;
 extern struct nand_flash_controller davinci_nand_controller;
 extern struct nand_flash_controller lpc3180_nand_controller;
 extern struct nand_flash_controller orion_nand_controller;
@@ -49,6 +50,7 @@ extern struct nand_flash_controller imx31_nand_flash_controller;
 
 static struct nand_flash_controller *nand_flash_controllers[] =
 {
+	&nonce_nand_controller,
 	&davinci_nand_controller,
 	&lpc3180_nand_controller,
 	&orion_nand_controller,

src/flash/nonce_nand.c

@@ -0,0 +1,80 @@
+/***************************************************************************
+ *   Copyright (C) 2009 Zachary T Welch <zw@superlucidity.net>             *
+ *                                                                         *
+ *   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.             *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "nand.h"
+
+
+static int nonce_nand_command(struct nand_device *nand, uint8_t command)
+{
+	return ERROR_OK;
+}
+static int nonce_nand_address(struct nand_device *nand, uint8_t address)
+{
+	return ERROR_OK;
+}
+static int nonce_nand_read(struct nand_device *nand, void *data)
+{
+	return ERROR_OK;
+}
+static int nonce_nand_write(struct nand_device *nand, uint16_t data)
+{
+	return ERROR_OK;
+}
+static int nonce_nand_fast_block_write(struct nand_device *nand,
+		uint8_t *data, int size)
+{
+	return ERROR_OK;
+}
+
+static int nonce_nand_reset(struct nand_device *nand)
+{
+	return nonce_nand_command(nand, NAND_CMD_RESET);
+}
+
+static int nonce_nand_controller_ready(struct nand_device *nand, int timeout)
+{
+	return true;
+}
+
+NAND_DEVICE_COMMAND_HANDLER(nonce_nand_device_command)
+{
+	return ERROR_OK;
+}
+
+static int nonce_nand_init(struct nand_device *nand)
+{
+	return ERROR_OK;
+}
+
+struct nand_flash_controller nonce_nand_controller =
+{
+	.name			= "nonce",
+	.nand_device_command	= &nonce_nand_device_command,
+	.init			= &nonce_nand_init,
+	.reset			= &nonce_nand_reset,
+	.command		= &nonce_nand_command,
+	.address		= &nonce_nand_address,
+	.read_data		= &nonce_nand_read,
+	.write_data		= &nonce_nand_write,
+	.write_block_data	= &nonce_nand_fast_block_write,
+	.controller_ready	= &nonce_nand_controller_ready,
+};