add flash/nor/core.[ch]

The newly moved flash TCL routines access the internals of the module
too much.  Fix the layering issues by adding new core NOR flash APIs:

<flash/nor/core.h>:
  - flash_driver_find_by_name() - self-descriptive

<flash/nor/imp.h>:
  - flash_bank_add()            - encapsulates adding banks to bank list
  - flash_bank_list()           - encapsulates retreiving bank list

This allows the externs in flash/nor/imp.h to be removed, and
these mechanisms may now be re-used by other flash module code.

1 files changed, 65 insertions, 0 deletions

diff --git a/src/flash/nor/core.c b/src/flash/nor/core.c
new file mode 100644
index 00000000..a69c3f49
--- /dev/null
+++ b/src/flash/nor/core.c
@@ -0,0 +1,65 @@
+/***************************************************************************
+ *   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 <flash/flash.h>
+#include <flash/nor/imp.h>
+
+// in flash.c, to be moved here
+extern struct flash_driver *flash_drivers[];
+extern struct flash_bank *flash_banks;
+
+struct flash_driver *flash_driver_find_by_name(const char *name)
+{
+	for (unsigned i = 0; flash_drivers[i]; i++)
+	{
+		if (strcmp(name, flash_drivers[i]->name) == 0)
+			return flash_drivers[i];
+	}
+	return NULL;
+}
+
+void flash_bank_add(struct flash_bank *bank)
+{
+	/* put flash bank in linked list */
+	unsigned bank_num = 0;
+	if (flash_banks)
+	{
+		/* find last flash bank */
+		struct flash_bank *p = flash_banks;
+		while (NULL != p->next)
+		{
+			bank_num += 1;
+			p = p->next;
+		}
+		p->next = bank;
+		bank_num += 1;
+	}
+	else
+		flash_banks = bank;
+
+	bank->bank_number = bank_num;
+}
+
+struct flash_bank *flash_bank_list(void)
+{
+	return flash_banks;
+}