/*
 * NAND Flash Controller Device Driver
 * Copyright (c) 2009 - 2010, Intel Corporation and its suppliers.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 */

#ifndef __DENALI_H__
#define __DENALI_H__

#include <linux/bitops.h>
#include <linux/mtd/nand.h>

#define DEVICE_RESET				0x0
#define     DEVICE_RESET__BANK0				0x0001
#define     DEVICE_RESET__BANK1				0x0002
#define     DEVICE_RESET__BANK2				0x0004
#define     DEVICE_RESET__BANK3				0x0008

#define TRANSFER_SPARE_REG			0x10
#define     TRANSFER_SPARE_REG__FLAG			0x0001

#define LOAD_WAIT_CNT				0x20
#define     LOAD_WAIT_CNT__VALUE			0xffff

#define PROGRAM_WAIT_CNT			0x30
#define     PROGRAM_WAIT_CNT__VALUE			0xffff

#define ERASE_WAIT_CNT				0x40
#define     ERASE_WAIT_CNT__VALUE			0xffff

#define INT_MON_CYCCNT				0x50
#define     INT_MON_CYCCNT__VALUE			0xffff

#define RB_PIN_ENABLED				0x60
#define     RB_PIN_ENABLED__BANK0			0x0001
#define     RB_PIN_ENABLED__BANK1			0x0002
#define     RB_PIN_ENABLED__BANK2			0x0004
#define     RB_PIN_ENABLED__BANK3			0x0008

#define MULTIPLANE_OPERATION			0x70
#define     MULTIPLANE_OPERATION__FLAG			0x0001

#define MULTIPLANE_READ_ENABLE			0x80
#define     MULTIPLANE_READ_ENABLE__FLAG		0x0001

#define COPYBACK_DISABLE			0x90
#define     COPYBACK_DISABLE__FLAG			0x0001

#define CACHE_WRITE_ENABLE			0xa0
#define     CACHE_WRITE_ENABLE__FLAG			0x0001

#define CACHE_READ_ENABLE			0xb0
#define     CACHE_READ_ENABLE__FLAG			0x0001

#define PREFETCH_MODE				0xc0
#define     PREFETCH_MODE__PREFETCH_EN			0x0001
#define     PREFETCH_MODE__PREFETCH_BURST_LENGTH	0xfff0

#define CHIP_ENABLE_DONT_CARE			0xd0
#define     CHIP_EN_DONT_CARE__FLAG			0x01

#define ECC_ENABLE				0xe0
#define     ECC_ENABLE__FLAG				0x0001

#define GLOBAL_INT_ENABLE			0xf0
#define     GLOBAL_INT_EN_FLAG				0x01

#define WE_2_RE					0x100
#define     WE_2_RE__VALUE				0x003f

#define ADDR_2_DATA				0x110
#define     ADDR_2_DATA__VALUE				0x003f

#define RE_2_WE					0x120
#define     RE_2_WE__VALUE				0x003f

#define ACC_CLKS				0x130
#define     ACC_CLKS__VALUE				0x000f

#define NUMBER_OF_PLANES			0x140
#define     NUMBER_OF_PLANES__VALUE			0x0007

#define PAGES_PER_BLOCK				0x150
#define     PAGES_PER_BLOCK__VALUE			0xffff

#define DEVICE_WIDTH				0x160
#define     DEVICE_WIDTH__VALUE				0x0003

#define DEVICE_MAIN_AREA_SIZE			0x170
#define     DEVICE_MAIN_AREA_SIZE__VALUE		0xffff

#define DEVICE_SPARE_AREA_SIZE			0x180
#define     DEVICE_SPARE_AREA_SIZE__VALUE		0xffff

#define TWO_ROW_ADDR_CYCLES			0x190
#define     TWO_ROW_ADDR_CYCLES__FLAG			0x0001

#define MULTIPLANE_ADDR_RESTRICT		0x1a0
#define     MULTIPLANE_ADDR_RESTRICT__FLAG		0x0001

#define ECC_CORRECTION				0x1b0
#define     ECC_CORRECTION__VALUE			0x001f

#define READ_MODE				0x1c0
#define     READ_MODE__VALUE				0x000f

#define WRITE_MODE				0x1d0
#define     WRITE_MODE__VALUE				0x000f

#define COPYBACK_MODE				0x1e0
#define     COPYBACK_MODE__VALUE			0x000f

#define RDWR_EN_LO_CNT				0x1f0
#define     RDWR_EN_LO_CNT__VALUE			0x001f

#define RDWR_EN_HI_CNT				0x200
#define     RDWR_EN_HI_CNT__VALUE			0x001f

#define MAX_RD_DELAY				0x210
#define     MAX_RD_DELAY__VALUE				0x000f

#define CS_SETUP_CNT				0x220
#define     CS_SETUP_CNT__VALUE				0x001f

#define SPARE_AREA_SKIP_BYTES			0x230
#define     SPARE_AREA_SKIP_BYTES__VALUE		0x003f

#define SPARE_AREA_MARKER			0x240
#define     SPARE_AREA_MARKER__VALUE			0xffff

#define DEVICES_CONNECTED			0x250
#define     DEVICES_CONNECTED__VALUE			0x0007

#define DIE_MASK				0x260
#define     DIE_MASK__VALUE				0x00ff

#define FIRST_BLOCK_OF_NEXT_PLANE		0x270
#define     FIRST_BLOCK_OF_NEXT_PLANE__VALUE		0xffff

#define WRITE_PROTECT				0x280
#define     WRITE_PROTECT__FLAG				0x0001

#define RE_2_RE					0x290
#define     RE_2_RE__VALUE				0x003f

#define MANUFACTURER_ID				0x300
#define     MANUFACTURER_ID__VALUE			0x00ff

#define DEVICE_ID				0x310
#define     DEVICE_ID__VALUE				0x00ff

#define DEVICE_PARAM_0				0x320
#define     DEVICE_PARAM_0__VALUE			0x00ff

#define DEVICE_PARAM_1				0x330
#define     DEVICE_PARAM_1__VALUE			0x00ff

#define DEVICE_PARAM_2				0x340
#define     DEVICE_PARAM_2__VALUE			0x00ff

#define LOGICAL_PAGE_DATA_SIZE			0x350
#define     LOGICAL_PAGE_DATA_SIZE__VALUE		0xffff

#define LOGICAL_PAGE_SPARE_SIZE			0x360
#define     LOGICAL_PAGE_SPARE_SIZE__VALUE		0xffff

#define REVISION				0x370
#define     REVISION__VALUE				0xffff

#define ONFI_DEVICE_FEATURES			0x380
#define     ONFI_DEVICE_FEATURES__VALUE			0x003f

#define ONFI_OPTIONAL_COMMANDS			0x390
#define     ONFI_OPTIONAL_COMMANDS__VALUE		0x003f

#define ONFI_TIMING_MODE			0x3a0
#define     ONFI_TIMING_MODE__VALUE			0x003f

#define ONFI_PGM_CACHE_TIMING_MODE		0x3b0
#define     ONFI_PGM_CACHE_TIMING_MODE__VALUE		0x003f

#define ONFI_DEVICE_NO_OF_LUNS			0x3c0
#define     ONFI_DEVICE_NO_OF_LUNS__NO_OF_LUNS		0x00ff
#define     ONFI_DEVICE_NO_OF_LUNS__ONFI_DEVICE		0x0100

#define ONFI_DEVICE_NO_OF_BLOCKS_PER_LUN_L	0x3d0
#define     ONFI_DEVICE_NO_OF_BLOCKS_PER_LUN_L__VALUE	0xffff

#define ONFI_DEVICE_NO_OF_BLOCKS_PER_LUN_U	0x3e0
#define     ONFI_DEVICE_NO_OF_BLOCKS_PER_LUN_U__VALUE	0xffff

#define FEATURES					0x3f0
#define     FEATURES__N_BANKS				0x0003
#define     FEATURES__ECC_MAX_ERR			0x003c
#define     FEATURES__DMA				0x0040
#define     FEATURES__CMD_DMA				0x0080
#define     FEATURES__PARTITION				0x0100
#define     FEATURES__XDMA_SIDEBAND			0x0200
#define     FEATURES__GPREG				0x0400
#define     FEATURES__INDEX_ADDR			0x0800

#define TRANSFER_MODE				0x400
#define     TRANSFER_MODE__VALUE			0x0003

#define INTR_STATUS(__bank)	(0x410 + ((__bank) * 0x50))
#define INTR_EN(__bank)		(0x420 + ((__bank) * 0x50))
/* bit[1:0] is used differently depending on IP version */
#define     INTR__ECC_UNCOR_ERR				0x0001	/* new IP */
#define     INTR__ECC_TRANSACTION_DONE			0x0001	/* old IP */
#define     INTR__ECC_ERR				0x0002	/* old IP */
#define     INTR__DMA_CMD_COMP				0x0004
#define     INTR__TIME_OUT				0x0008
#define     INTR__PROGRAM_FAIL				0x0010
#define     INTR__ERASE_FAIL				0x0020
#define     INTR__LOAD_COMP				0x0040
#define     INTR__PROGRAM_COMP				0x0080
#define     INTR__ERASE_COMP				0x0100
#define     INTR__PIPE_CPYBCK_CMD_COMP			0x0200
#define     INTR__LOCKED_BLK				0x0400
#define     INTR__UNSUP_CMD				0x0800
#define     INTR__INT_ACT				0x1000
#define     INTR__RST_COMP				0x2000
#define     INTR__PIPE_CMD_ERR				0x4000
#define     INTR__PAGE_XFER_INC				0x8000

#define PAGE_CNT(__bank)	(0x430 + ((__bank) * 0x50))
#define ERR_PAGE_ADDR(__bank)	(0x440 + ((__bank) * 0x50))
#define ERR_BLOCK_ADDR(__bank)	(0x450 + ((__bank) * 0x50))

#define ECC_THRESHOLD				0x600
#define     ECC_THRESHOLD__VALUE			0x03ff

#define ECC_ERROR_BLOCK_ADDRESS			0x610
#define     ECC_ERROR_BLOCK_ADDRESS__VALUE		0xffff

#define ECC_ERROR_PAGE_ADDRESS			0x620
#define     ECC_ERROR_PAGE_ADDRESS__VALUE		0x0fff
#define     ECC_ERROR_PAGE_ADDRESS__BANK		0xf000

#define ECC_ERROR_ADDRESS			0x630
#define     ECC_ERROR_ADDRESS__OFFSET			0x0fff
#define     ECC_ERROR_ADDRESS__SECTOR_NR		0xf000

#define ERR_CORRECTION_INFO			0x640
#define     ERR_CORRECTION_INFO__BYTEMASK		0x00ff
#define     ERR_CORRECTION_INFO__DEVICE_NR		0x0f00
#define     ERR_CORRECTION_INFO__ERROR_TYPE		0x4000
#define     ERR_CORRECTION_INFO__LAST_ERR_INFO		0x8000

#define ECC_COR_INFO(bank)			(0x650 + (bank) / 2 * 0x10)
#define     ECC_COR_INFO__SHIFT(bank)			((bank) % 2 * 8)
#define     ECC_COR_INFO__MAX_ERRORS			0x007f
#define     ECC_COR_INFO__UNCOR_ERR			0x0080

#define DMA_ENABLE				0x700
#define     DMA_ENABLE__FLAG				0x0001

#define IGNORE_ECC_DONE				0x710
#define     IGNORE_ECC_DONE__FLAG			0x0001

#define DMA_INTR				0x720
#define DMA_INTR_EN				0x730
#define     DMA_INTR__TARGET_ERROR			0x0001
#define     DMA_INTR__DESC_COMP_CHANNEL0		0x0002
#define     DMA_INTR__DESC_COMP_CHANNEL1		0x0004
#define     DMA_INTR__DESC_COMP_CHANNEL2		0x0008
#define     DMA_INTR__DESC_COMP_CHANNEL3		0x0010
#define     DMA_INTR__MEMCOPY_DESC_COMP			0x0020

#define TARGET_ERR_ADDR_LO			0x740
#define     TARGET_ERR_ADDR_LO__VALUE			0xffff

#define TARGET_ERR_ADDR_HI			0x750
#define     TARGET_ERR_ADDR_HI__VALUE			0xffff

#define CHNL_ACTIVE				0x760
#define     CHNL_ACTIVE__CHANNEL0			0x0001
#define     CHNL_ACTIVE__CHANNEL1			0x0002
#define     CHNL_ACTIVE__CHANNEL2			0x0004
#define     CHNL_ACTIVE__CHANNEL3			0x0008

#define FAIL 1                  /*failed flag*/
#define PASS 0                  /*success flag*/

#define CLK_X  5
#define CLK_MULTI 4

#define ONFI_BLOOM_TIME         1
#define MODE5_WORKAROUND        0


#define MODE_00    0x00000000
#define MODE_01    0x04000000
#define MODE_10    0x08000000
#define MODE_11    0x0C000000

#define ECC_SECTOR_SIZE     512

struct nand_buf {
	int head;
	int tail;
	uint8_t *buf;
	dma_addr_t dma_buf;
};

#define INTEL_CE4100	1
#define INTEL_MRST	2
#define DT		3

struct denali_nand_info {
	struct nand_chip nand;
	int flash_bank; /* currently selected chip */
	int status;
	int platform;
	struct nand_buf buf;
	struct device *dev;
	int total_used_banks;
	int page;
	void __iomem *flash_reg;	/* Register Interface */
	void __iomem *flash_mem;	/* Host Data/Command Interface */

	/* elements used by ISR */
	struct completion complete;
	spinlock_t irq_lock;
	uint32_t irq_status;
	int irq;

	int devnum;	/* represent how many nands connected */
	int bbtskipbytes;
	int max_banks;
	unsigned int revision;
	unsigned int caps;
};

#define DENALI_CAP_HW_ECC_FIXUP			BIT(0)
#define DENALI_CAP_DMA_64BIT			BIT(1)

extern int denali_init(struct denali_nand_info *denali);
extern void denali_remove(struct denali_nand_info *denali);

#endif /* __DENALI_H__ */