/*
 * 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/rawnand.h>

#define DEVICE_RESET				0x0
#define     DEVICE_RESET__BANK(bank)			BIT(bank)

#define TRANSFER_SPARE_REG			0x10
#define     TRANSFER_SPARE_REG__FLAG			BIT(0)

#define LOAD_WAIT_CNT				0x20
#define     LOAD_WAIT_CNT__VALUE			GENMASK(15, 0)

#define PROGRAM_WAIT_CNT			0x30
#define     PROGRAM_WAIT_CNT__VALUE			GENMASK(15, 0)

#define ERASE_WAIT_CNT				0x40
#define     ERASE_WAIT_CNT__VALUE			GENMASK(15, 0)

#define INT_MON_CYCCNT				0x50
#define     INT_MON_CYCCNT__VALUE			GENMASK(15, 0)

#define RB_PIN_ENABLED				0x60
#define     RB_PIN_ENABLED__BANK(bank)			BIT(bank)

#define MULTIPLANE_OPERATION			0x70
#define     MULTIPLANE_OPERATION__FLAG			BIT(0)

#define MULTIPLANE_READ_ENABLE			0x80
#define     MULTIPLANE_READ_ENABLE__FLAG		BIT(0)

#define COPYBACK_DISABLE			0x90
#define     COPYBACK_DISABLE__FLAG			BIT(0)

#define CACHE_WRITE_ENABLE			0xa0
#define     CACHE_WRITE_ENABLE__FLAG			BIT(0)

#define CACHE_READ_ENABLE			0xb0
#define     CACHE_READ_ENABLE__FLAG			BIT(0)

#define PREFETCH_MODE				0xc0
#define     PREFETCH_MODE__PREFETCH_EN			BIT(0)
#define     PREFETCH_MODE__PREFETCH_BURST_LENGTH	GENMASK(15, 4)

#define CHIP_ENABLE_DONT_CARE			0xd0
#define     CHIP_EN_DONT_CARE__FLAG			BIT(0)

#define ECC_ENABLE				0xe0
#define     ECC_ENABLE__FLAG				BIT(0)

#define GLOBAL_INT_ENABLE			0xf0
#define     GLOBAL_INT_EN_FLAG				BIT(0)

#define TWHR2_AND_WE_2_RE			0x100
#define     TWHR2_AND_WE_2_RE__WE_2_RE			GENMASK(5, 0)
#define     TWHR2_AND_WE_2_RE__TWHR2			GENMASK(13, 8)

#define TCWAW_AND_ADDR_2_DATA			0x110
/* The width of ADDR_2_DATA is 6 bit for old IP, 7 bit for new IP */
#define     TCWAW_AND_ADDR_2_DATA__ADDR_2_DATA		GENMASK(6, 0)
#define     TCWAW_AND_ADDR_2_DATA__TCWAW		GENMASK(13, 8)

#define RE_2_WE					0x120
#define     RE_2_WE__VALUE				GENMASK(5, 0)

#define ACC_CLKS				0x130
#define     ACC_CLKS__VALUE				GENMASK(3, 0)

#define NUMBER_OF_PLANES			0x140
#define     NUMBER_OF_PLANES__VALUE			GENMASK(2, 0)

#define PAGES_PER_BLOCK				0x150
#define     PAGES_PER_BLOCK__VALUE			GENMASK(15, 0)

#define DEVICE_WIDTH				0x160
#define     DEVICE_WIDTH__VALUE				GENMASK(1, 0)

#define DEVICE_MAIN_AREA_SIZE			0x170
#define     DEVICE_MAIN_AREA_SIZE__VALUE		GENMASK(15, 0)

#define DEVICE_SPARE_AREA_SIZE			0x180
#define     DEVICE_SPARE_AREA_SIZE__VALUE		GENMASK(15, 0)

#define TWO_ROW_ADDR_CYCLES			0x190
#define     TWO_ROW_ADDR_CYCLES__FLAG			BIT(0)

#define MULTIPLANE_ADDR_RESTRICT		0x1a0
#define     MULTIPLANE_ADDR_RESTRICT__FLAG		BIT(0)

#define ECC_CORRECTION				0x1b0
#define     ECC_CORRECTION__VALUE			GENMASK(4, 0)
#define     ECC_CORRECTION__ERASE_THRESHOLD		GENMASK(31, 16)
#define     MAKE_ECC_CORRECTION(val, thresh)		\
			(((val) & (ECC_CORRECTION__VALUE)) | \
			(((thresh) << 16) & (ECC_CORRECTION__ERASE_THRESHOLD)))

#define READ_MODE				0x1c0
#define     READ_MODE__VALUE				GENMASK(3, 0)

#define WRITE_MODE				0x1d0
#define     WRITE_MODE__VALUE				GENMASK(3, 0)

#define COPYBACK_MODE				0x1e0
#define     COPYBACK_MODE__VALUE			GENMASK(3, 0)

#define RDWR_EN_LO_CNT				0x1f0
#define     RDWR_EN_LO_CNT__VALUE			GENMASK(4, 0)

#define RDWR_EN_HI_CNT				0x200
#define     RDWR_EN_HI_CNT__VALUE			GENMASK(4, 0)

#define MAX_RD_DELAY				0x210
#define     MAX_RD_DELAY__VALUE				GENMASK(3, 0)

#define CS_SETUP_CNT				0x220
#define     CS_SETUP_CNT__VALUE				GENMASK(4, 0)
#define     CS_SETUP_CNT__TWB				GENMASK(17, 12)

#define SPARE_AREA_SKIP_BYTES			0x230
#define     SPARE_AREA_SKIP_BYTES__VALUE		GENMASK(5, 0)

#define SPARE_AREA_MARKER			0x240
#define     SPARE_AREA_MARKER__VALUE			GENMASK(15, 0)

#define DEVICES_CONNECTED			0x250
#define     DEVICES_CONNECTED__VALUE			GENMASK(2, 0)

#define DIE_MASK				0x260
#define     DIE_MASK__VALUE				GENMASK(7, 0)

#define FIRST_BLOCK_OF_NEXT_PLANE		0x270
#define     FIRST_BLOCK_OF_NEXT_PLANE__VALUE		GENMASK(15, 0)

#define WRITE_PROTECT				0x280
#define     WRITE_PROTECT__FLAG				BIT(0)

#define RE_2_RE					0x290
#define     RE_2_RE__VALUE				GENMASK(5, 0)

#define MANUFACTURER_ID				0x300
#define     MANUFACTURER_ID__VALUE			GENMASK(7, 0)

#define DEVICE_ID				0x310
#define     DEVICE_ID__VALUE				GENMASK(7, 0)

#define DEVICE_PARAM_0				0x320
#define     DEVICE_PARAM_0__VALUE			GENMASK(7, 0)

#define DEVICE_PARAM_1				0x330
#define     DEVICE_PARAM_1__VALUE			GENMASK(7, 0)

#define DEVICE_PARAM_2				0x340
#define     DEVICE_PARAM_2__VALUE			GENMASK(7, 0)

#define LOGICAL_PAGE_DATA_SIZE			0x350
#define     LOGICAL_PAGE_DATA_SIZE__VALUE		GENMASK(15, 0)

#define LOGICAL_PAGE_SPARE_SIZE			0x360
#define     LOGICAL_PAGE_SPARE_SIZE__VALUE		GENMASK(15, 0)

#define REVISION				0x370
#define     REVISION__VALUE				GENMASK(15, 0)

#define ONFI_DEVICE_FEATURES			0x380
#define     ONFI_DEVICE_FEATURES__VALUE			GENMASK(5, 0)

#define ONFI_OPTIONAL_COMMANDS			0x390
#define     ONFI_OPTIONAL_COMMANDS__VALUE		GENMASK(5, 0)

#define ONFI_TIMING_MODE			0x3a0
#define     ONFI_TIMING_MODE__VALUE			GENMASK(5, 0)

#define ONFI_PGM_CACHE_TIMING_MODE		0x3b0
#define     ONFI_PGM_CACHE_TIMING_MODE__VALUE		GENMASK(5, 0)

#define ONFI_DEVICE_NO_OF_LUNS			0x3c0
#define     ONFI_DEVICE_NO_OF_LUNS__NO_OF_LUNS		GENMASK(7, 0)
#define     ONFI_DEVICE_NO_OF_LUNS__ONFI_DEVICE		BIT(8)

#define ONFI_DEVICE_NO_OF_BLOCKS_PER_LUN_L	0x3d0
#define     ONFI_DEVICE_NO_OF_BLOCKS_PER_LUN_L__VALUE	GENMASK(15, 0)

#define ONFI_DEVICE_NO_OF_BLOCKS_PER_LUN_U	0x3e0
#define     ONFI_DEVICE_NO_OF_BLOCKS_PER_LUN_U__VALUE	GENMASK(15, 0)

#define FEATURES				0x3f0
#define     FEATURES__N_BANKS				GENMASK(1, 0)
#define     FEATURES__ECC_MAX_ERR			GENMASK(5, 2)
#define     FEATURES__DMA				BIT(6)
#define     FEATURES__CMD_DMA				BIT(7)
#define     FEATURES__PARTITION				BIT(8)
#define     FEATURES__XDMA_SIDEBAND			BIT(9)
#define     FEATURES__GPREG				BIT(10)
#define     FEATURES__INDEX_ADDR			BIT(11)

#define TRANSFER_MODE				0x400
#define     TRANSFER_MODE__VALUE			GENMASK(1, 0)

#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				BIT(0)	/* new IP */
#define     INTR__ECC_TRANSACTION_DONE			BIT(0)	/* old IP */
#define     INTR__ECC_ERR				BIT(1)	/* old IP */
#define     INTR__DMA_CMD_COMP				BIT(2)
#define     INTR__TIME_OUT				BIT(3)
#define     INTR__PROGRAM_FAIL				BIT(4)
#define     INTR__ERASE_FAIL				BIT(5)
#define     INTR__LOAD_COMP				BIT(6)
#define     INTR__PROGRAM_COMP				BIT(7)
#define     INTR__ERASE_COMP				BIT(8)
#define     INTR__PIPE_CPYBCK_CMD_COMP			BIT(9)
#define     INTR__LOCKED_BLK				BIT(10)
#define     INTR__UNSUP_CMD				BIT(11)
#define     INTR__INT_ACT				BIT(12)
#define     INTR__RST_COMP				BIT(13)
#define     INTR__PIPE_CMD_ERR				BIT(14)
#define     INTR__PAGE_XFER_INC				BIT(15)
#define     INTR__ERASED_PAGE				BIT(16)

#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			GENMASK(9, 0)

#define ECC_ERROR_BLOCK_ADDRESS			0x610
#define     ECC_ERROR_BLOCK_ADDRESS__VALUE		GENMASK(15, 0)

#define ECC_ERROR_PAGE_ADDRESS			0x620
#define     ECC_ERROR_PAGE_ADDRESS__VALUE		GENMASK(11, 0)
#define     ECC_ERROR_PAGE_ADDRESS__BANK		GENMASK(15, 12)

#define ECC_ERROR_ADDRESS			0x630
#define     ECC_ERROR_ADDRESS__OFFSET			GENMASK(11, 0)
#define     ECC_ERROR_ADDRESS__SECTOR_NR		GENMASK(15, 12)

#define ERR_CORRECTION_INFO			0x640
#define     ERR_CORRECTION_INFO__BYTEMASK		GENMASK(7, 0)
#define     ERR_CORRECTION_INFO__DEVICE_NR		GENMASK(11, 8)
#define     ERR_CORRECTION_INFO__ERROR_TYPE		BIT(14)
#define     ERR_CORRECTION_INFO__LAST_ERR_INFO		BIT(15)

#define ECC_COR_INFO(bank)			(0x650 + (bank) / 2 * 0x10)
#define     ECC_COR_INFO__SHIFT(bank)			((bank) % 2 * 8)
#define     ECC_COR_INFO__MAX_ERRORS			GENMASK(6, 0)
#define     ECC_COR_INFO__UNCOR_ERR			BIT(7)

#define CFG_DATA_BLOCK_SIZE			0x6b0

#define CFG_LAST_DATA_BLOCK_SIZE		0x6c0

#define CFG_NUM_DATA_BLOCKS			0x6d0

#define CFG_META_DATA_SIZE			0x6e0

#define DMA_ENABLE				0x700
#define     DMA_ENABLE__FLAG				BIT(0)

#define IGNORE_ECC_DONE				0x710
#define     IGNORE_ECC_DONE__FLAG			BIT(0)

#define DMA_INTR				0x720
#define DMA_INTR_EN				0x730
#define     DMA_INTR__TARGET_ERROR			BIT(0)
#define     DMA_INTR__DESC_COMP_CHANNEL0		BIT(1)
#define     DMA_INTR__DESC_COMP_CHANNEL1		BIT(2)
#define     DMA_INTR__DESC_COMP_CHANNEL2		BIT(3)
#define     DMA_INTR__DESC_COMP_CHANNEL3		BIT(4)
#define     DMA_INTR__MEMCOPY_DESC_COMP			BIT(5)

#define TARGET_ERR_ADDR_LO			0x740
#define     TARGET_ERR_ADDR_LO__VALUE			GENMASK(15, 0)

#define TARGET_ERR_ADDR_HI			0x750
#define     TARGET_ERR_ADDR_HI__VALUE			GENMASK(15, 0)

#define CHNL_ACTIVE				0x760
#define     CHNL_ACTIVE__CHANNEL0			BIT(0)
#define     CHNL_ACTIVE__CHANNEL1			BIT(1)
#define     CHNL_ACTIVE__CHANNEL2			BIT(2)
#define     CHNL_ACTIVE__CHANNEL3			BIT(3)

struct denali_nand_info {
	struct nand_chip nand;
	unsigned long clk_x_rate;	/* bus interface clock rate */
	int active_bank;		/* currently selected bank */
	struct device *dev;
	void __iomem *reg;		/* Register Interface */
	void __iomem *host;		/* Host Data/Command Interface */

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

	void *buf;
	dma_addr_t dma_addr;
	int dma_avail;
	int devs_per_cs;		/* devices connected in parallel */
	int oob_skip_bytes;
	int max_banks;
	unsigned int revision;
	unsigned int caps;
	const struct nand_ecc_caps *ecc_caps;
};

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

int denali_calc_ecc_bytes(int step_size, int strength);
extern int denali_init(struct denali_nand_info *denali);
extern void denali_remove(struct denali_nand_info *denali);

#endif /* __DENALI_H__ */