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/*
* (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_PRV_H__
#define __MG_DISK_PRV_H__
#include <mg_disk.h>
/* name for block device */
#define MG_DISK_NAME "mgd"
/* name for platform device */
#define MG_DEV_NAME "mg_disk"
#define MG_DISK_MAJ 240
#define MG_DISK_MAX_PART 16
#define MG_SECTOR_SIZE 512
#define MG_SECTOR_SIZE_MASK (512 - 1)
#define MG_SECTOR_SIZE_SHIFT (9)
#define MG_MAX_SECTS 256
/* Register offsets */
#define MG_BUFF_OFFSET 0x8000
#define MG_STORAGE_BUFFER_SIZE 0x200
#define MG_REG_OFFSET 0xC000
#define MG_REG_FEATURE (MG_REG_OFFSET + 2) /* write case */
#define MG_REG_ERROR (MG_REG_OFFSET + 2) /* read case */
#define MG_REG_SECT_CNT (MG_REG_OFFSET + 4)
#define MG_REG_SECT_NUM (MG_REG_OFFSET + 6)
#define MG_REG_CYL_LOW (MG_REG_OFFSET + 8)
#define MG_REG_CYL_HIGH (MG_REG_OFFSET + 0xA)
#define MG_REG_DRV_HEAD (MG_REG_OFFSET + 0xC)
#define MG_REG_COMMAND (MG_REG_OFFSET + 0xE) /* write case */
#define MG_REG_STATUS (MG_REG_OFFSET + 0xE) /* read case */
#define MG_REG_DRV_CTRL (MG_REG_OFFSET + 0x10)
#define MG_REG_BURST_CTRL (MG_REG_OFFSET + 0x12)
/* "Drive Select/Head Register" bit values */
#define MG_REG_HEAD_MUST_BE_ON 0xA0 /* These 2 bits are always on */
#define MG_REG_HEAD_DRIVE_MASTER (0x00 | MG_REG_HEAD_MUST_BE_ON)
#define MG_REG_HEAD_DRIVE_SLAVE (0x10 | MG_REG_HEAD_MUST_BE_ON)
#define MG_REG_HEAD_LBA_MODE (0x40 | MG_REG_HEAD_MUST_BE_ON)
/* "Device Control Register" bit values */
#define MG_REG_CTRL_INTR_ENABLE 0x0
#define MG_REG_CTRL_INTR_DISABLE (0x1 << 1)
#define MG_REG_CTRL_RESET (0x1 << 2)
#define MG_REG_CTRL_INTR_POLA_ACTIVE_HIGH 0x0
#define MG_REG_CTRL_INTR_POLA_ACTIVE_LOW (0x1 << 4)
#define MG_REG_CTRL_DPD_POLA_ACTIVE_LOW 0x0
#define MG_REG_CTRL_DPD_POLA_ACTIVE_HIGH (0x1 << 5)
#define MG_REG_CTRL_DPD_DISABLE 0x0
#define MG_REG_CTRL_DPD_ENABLE (0x1 << 6)
/* Status register bit */
/* error bit in status register */
#define MG_REG_STATUS_BIT_ERROR 0x01
/* corrected error in status register */
#define MG_REG_STATUS_BIT_CORRECTED_ERROR 0x04
/* data request bit in status register */
#define MG_REG_STATUS_BIT_DATA_REQ 0x08
/* DSC - Drive Seek Complete */
#define MG_REG_STATUS_BIT_SEEK_DONE 0x10
/* DWF - Drive Write Fault */
#define MG_REG_STATUS_BIT_WRITE_FAULT 0x20
#define MG_REG_STATUS_BIT_READY 0x40
#define MG_REG_STATUS_BIT_BUSY 0x80
/* handy status */
#define MG_STAT_READY (MG_REG_STATUS_BIT_READY | MG_REG_STATUS_BIT_SEEK_DONE)
#define MG_READY_OK(s) (((s) & (MG_STAT_READY | \
(MG_REG_STATUS_BIT_BUSY | \
MG_REG_STATUS_BIT_WRITE_FAULT | \
MG_REG_STATUS_BIT_ERROR))) == MG_STAT_READY)
/* Error register */
#define MG_REG_ERR_AMNF 0x01
#define MG_REG_ERR_ABRT 0x04
#define MG_REG_ERR_IDNF 0x10
#define MG_REG_ERR_UNC 0x40
#define MG_REG_ERR_BBK 0x80
/* error code for others */
#define MG_ERR_NONE 0
#define MG_ERR_TIMEOUT 0x100
#define MG_ERR_INIT_STAT 0x101
#define MG_ERR_TRANSLATION 0x102
#define MG_ERR_CTRL_RST 0x103
#define MG_ERR_NO_DRV_DATA 0x104
#define MG_MAX_ERRORS 16 /* Max read/write errors/sector */
#define MG_RESET_FREQ 4 /* Reset controller every 4th retry */
/* command */
#define MG_CMD_RD 0x20
#define MG_CMD_WR 0x30
#define MG_CMD_SLEEP 0x99
#define MG_CMD_WAKEUP 0xC3
#define MG_CMD_ID 0xEC
#define MG_CMD_WR_CONF 0x3C
#define MG_CMD_RD_CONF 0x40
union mg_uniwb{
u16 w;
u8 b[2];
};
/* main structure for mflash driver */
struct mg_host {
struct mg_drv_data *drv_data;
/* for future use */
};
/*
* Debugging macro and defines
*/
#undef DO_MG_DEBUG
#ifdef DO_MG_DEBUG
# define MG_DBG(fmt, args...) printf("%s:%d "fmt"\n", __func__, __LINE__,##args)
#else /* CONFIG_MG_DEBUG */
# define MG_DBG(fmt, args...) do { } while(0)
#endif /* CONFIG_MG_DEBUG */
#endif
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