mflash: Initial mflash support

Mflash is fusion memory device mainly targeted consumer eletronic and
mobile phone.
Internally, it have nand flash and other hardware logics and supports
some different operation (ATA, IO, XIP) modes.

IO mode is custom mode for the host that doesn't have IDE interface.
(Many mobile targeted SoC doesn't have IDE bus)

This driver support mflash IO mode.

Followings are brief descriptions about IO mode.

1. IO mode based on ATA protocol and uses some custom command. (read
   confirm, write confirm)
2. IO mode uses SRAM bus interface.

Signed-off-by: unsik Kim <donari75@gmail.com>

4 files changed, 65 insertions, 0 deletions

diff --git a/include/config_cmd_all.h b/include/config_cmd_all.h
index c5e0d268e3a..c747b4baa19 100644
--- a/include/config_cmd_all.h
+++ b/include/config_cmd_all.h
@@ -84,5 +84,6 @@
 #define CONFIG_CMD_VFD		/* VFD support (TRAB)		*/
 #define CONFIG_CMD_XIMG		/* Load part of Multi Image	*/
 #define CONFIG_CMD_AT91_SPIMUX	/* AT91 MMC/SPI Mux Support     */
+#define CONFIG_CMD_MG_DISK	/* mGine m(g)flash IO node support */
 
 #endif	/* _CONFIG_CMD_ALL_H */
diff --git a/include/environment.h b/include/environment.h
index ea6b4d12ec6..507e8326a3a 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -84,6 +84,18 @@
 # endif
 #endif /* CONFIG_ENV_IS_IN_NAND */
 
+#if defined(CONFIG_ENV_IS_IN_MG_DISK)
+# ifndef CONFIG_ENV_ADDR
+#  error "Need to define CONFIG_ENV_ADDR when using CONFIG_ENV_IS_IN_MG_DISK"
+# endif
+# ifndef CONFIG_ENV_SIZE
+#  error "Need to define CONFIG_ENV_SIZE when using CONFIG_ENV_IS_IN_MG_DISK"
+# endif
+# ifdef CONFIG_ENV_IS_EMBEDDED
+#  error "CONFIG_ENV_IS_EMBEDDED not supported when using CONFIG_ENV_IS_IN_MG_DISK"
+# endif
+#endif /* CONFIG_ENV_IS_IN_MG_DISK */
+
 #ifdef USE_HOSTCC
 # include <stdint.h>
 #else
diff --git a/include/mg_disk.h b/include/mg_disk.h
new file mode 100644
index 00000000000..bd767a11570
--- /dev/null
+++ b/include/mg_disk.h
@@ -0,0 +1,51 @@
+/*
+ * (C) Copyright 2009 mGine co.
+ * unsik Kim <donari75@gmail.com>
+ *
+ * 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
+ */
+
+#ifndef MG_DISK_H_
+#define MG_DISK_H_
+
+#include <asm/types.h>
+
+/* private driver data */
+struct mg_drv_data {
+	/* base address of mflash */
+	u32 base;
+	/* Initialize hard reset, write protect, deep power down pins.
+	 * Set these pins to GPIO and output high
+	 */
+	void (*mg_ctrl_pin_init) (void);
+	/* Set hard reset pin for given level
+	 * level : logical level of hard reset pin (0 or 1)
+	 */
+	void (*mg_hdrst_pin) (u8 level);
+};
+
+struct mg_drv_data* mg_get_drv_data (void);
+
+unsigned int mg_disk_init (void);
+unsigned int mg_disk_read (u32 addr, u8 *buff, u32 len);
+unsigned int mg_disk_write(u32 addr, u8 *buff, u32 len);
+unsigned int mg_disk_write_sects(void *buff, u32 sect_num, u32 sect_cnt);
+unsigned int mg_disk_read_sects(void *buff, u32 sect_num, u32 sect_cnt);
+
+#endif /*MG_DISK_H_*/
diff --git a/include/part.h b/include/part.h
index 980fd043593..3cdae0214ee 100644
--- a/include/part.h
+++ b/include/part.h
@@ -100,6 +100,7 @@ block_dev_desc_t* scsi_get_dev(int dev);
 block_dev_desc_t* usb_stor_get_dev(int dev);
 block_dev_desc_t* mmc_get_dev(int dev);
 block_dev_desc_t* systemace_get_dev(int dev);
+block_dev_desc_t* mg_disk_get_dev(int dev);
 
 /* disk/part.c */
 int get_partition_info (block_dev_desc_t * dev_desc, int part, disk_partition_t *info);