linux-imx

/*

 * HiSilicon SPI Nor Flash Controller Driver

 *

 * Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd.

 *

 * 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, see <http://www.gnu.org/licenses/>.

 */

#include <linux/bitops.h>

#include <linux/clk.h>

#include <linux/dma-mapping.h>

#include <linux/iopoll.h>

#include <linux/module.h>

#include <linux/mtd/mtd.h>

#include <linux/mtd/spi-nor.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

​

/* Hardware register offsets and field definitions */

#define FMC_CFG             0x00

#define FMC_CFG_OP_MODE_MASK        BIT_MASK(0)

#define FMC_CFG_OP_MODE_BOOT        0

#define FMC_CFG_OP_MODE_NORMAL      1

#define FMC_CFG_FLASH_SEL(type)     (((type) & 0x3) << 1)

#define FMC_CFG_FLASH_SEL_MASK      0x6

#define FMC_ECC_TYPE(type)      (((type) & 0x7) << 5)

#define FMC_ECC_TYPE_MASK       GENMASK(7, 5)

#define SPI_NOR_ADDR_MODE_MASK      BIT_MASK(10)

#define SPI_NOR_ADDR_MODE_3BYTES    (0x0 << 10)

#define SPI_NOR_ADDR_MODE_4BYTES    (0x1 << 10)

#define FMC_GLOBAL_CFG          0x04

#define FMC_GLOBAL_CFG_WP_ENABLE    BIT(6)

#define FMC_SPI_TIMING_CFG      0x08

#define TIMING_CFG_TCSH(nr)     (((nr) & 0xf) << 8)

#define TIMING_CFG_TCSS(nr)     (((nr) & 0xf) << 4)

#define TIMING_CFG_TSHSL(nr)        ((nr) & 0xf)

#define CS_HOLD_TIME            0x6

#define CS_SETUP_TIME           0x6

#define CS_DESELECT_TIME        0xf

#define FMC_INT             0x18

#define FMC_INT_OP_DONE         BIT(0)

#define FMC_INT_CLR         0x20

#define FMC_CMD             0x24

#define FMC_CMD_CMD1(cmd)       ((cmd) & 0xff)

#define FMC_ADDRL           0x2c

#define FMC_OP_CFG          0x30

#define OP_CFG_FM_CS(cs)        ((cs) << 11)

#define OP_CFG_MEM_IF_TYPE(type)    (((type) & 0x7) << 7)

#define OP_CFG_ADDR_NUM(addr)       (((addr) & 0x7) << 4)

#define OP_CFG_DUMMY_NUM(dummy)     ((dummy) & 0xf)

#define FMC_DATA_NUM            0x38

#define FMC_DATA_NUM_CNT(cnt)       ((cnt) & GENMASK(13, 0))