/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Freescale GPMI NAND Flash Driver
*
* Copyright ( C ) 2010 - 2011 Freescale Semiconductor , Inc .
* Copyright ( C ) 2008 Embedded Alley Solutions , Inc .
*/
#ifndef __DRIVERS_MTD_NAND_GPMI_NAND_H
#define __DRIVERS_MTD_NAND_GPMI_NAND_H
#include <linux/mtd/rawnand.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#define GPMI_CLK_MAX 5 /* MX6Q needs five clocks */
struct resources {
void __iomem *gpmi_regs;
void __iomem *bch_regs;
unsigned int dma_low_channel;
unsigned int dma_high_channel;
struct clk *clock[GPMI_CLK_MAX];
};
/**
* struct bch_geometry - BCH geometry description .
* @ gf_len : The length of Galois Field . ( e . g . , 13 or 14 )
* @ ecc_strength : A number that describes the strength of the ECC
* algorithm .
* @ page_size : The size , in bytes , of a physical page , including
* both data and OOB .
* @ metadata_size : The size , in bytes , of the metadata .
* @ ecc0_chunk_size : The size , in bytes , of a first ECC chunk .
* @ eccn_chunk_size : The size , in bytes , of a single ECC chunk after
* the first chunk in the page .
* @ ecc_chunk_count : The number of ECC chunks in the page ,
* @ payload_size : The size , in bytes , of the payload buffer .
* @ auxiliary_size : The size , in bytes , of the auxiliary buffer .
* @ auxiliary_status_offset : The offset into the auxiliary buffer at which
* the ECC status appears .
* @ block_mark_byte_offset : The byte offset in the ECC - based page view at
* which the underlying physical block mark appears .
* @ block_mark_bit_offset : The bit offset into the ECC - based page view at
* which the underlying physical block mark appears .
* @ ecc_for_meta : The flag to indicate if there is a dedicate ecc
* for meta .
*/
struct bch_geometry {
unsigned int gf_len;
unsigned int ecc_strength;
unsigned int page_size;
unsigned int metadata_size;
unsigned int ecc0_chunk_size;
unsigned int eccn_chunk_size;
unsigned int ecc_chunk_count;
unsigned int payload_size;
unsigned int auxiliary_size;
unsigned int auxiliary_status_offset;
unsigned int block_mark_byte_offset;
unsigned int block_mark_bit_offset;
unsigned int ecc_for_meta; /* ECC for meta data */
};
/**
* struct boot_rom_geometry - Boot ROM geometry description .
* @ stride_size_in_pages : The size of a boot block stride , in pages .
* @ search_area_stride_exponent : The logarithm to base 2 of the size of a
* search area in boot block strides .
*/
struct boot_rom_geometry {
unsigned int stride_size_in_pages;
unsigned int search_area_stride_exponent;
};
enum gpmi_type {
IS_MX23,
IS_MX28,
IS_MX6Q,
IS_MX6SX,
IS_MX7D,
IS_MX8QXP,
};
struct gpmi_devdata {
enum gpmi_type type;
int bch_max_ecc_strength;
int max_chain_delay; /* See the SDR EDO mode */
const char * const *clks;
const int clks_count;
bool support_edo_timing;
};
/**
* struct gpmi_nfc_hardware_timing - GPMI hardware timing parameters .
* @ must_apply_timings : Whether controller timings have already been
* applied or not ( useful only while there is
* support for only one chip select )
* @ clk_rate : The clock rate that must be used to derive the
* following parameters
* @ timing0 : HW_GPMI_TIMING0 register
* @ timing1 : HW_GPMI_TIMING1 register
* @ ctrl1n : HW_GPMI_CTRL1n register
*/
struct gpmi_nfc_hardware_timing {
bool must_apply_timings;
unsigned long int clk_rate;
u32 timing0;
u32 timing1;
u32 ctrl1n;
};
#define GPMI_MAX_TRANSFERS 8
struct gpmi_transfer {
u8 cmdbuf[8 ];
struct scatterlist sgl;
enum dma_data_direction direction;
};
struct gpmi_nand_data {
/* Devdata */
const struct gpmi_devdata *devdata;
/* System Interface */
struct device *dev;
struct platform_device *pdev;
/* Resources */
struct resources resources;
/* Flash Hardware */
struct gpmi_nfc_hardware_timing hw;
/* BCH */
struct bch_geometry bch_geometry;
struct completion bch_done;
/* NAND Boot issue */
bool swap_block_mark;
struct boot_rom_geometry rom_geometry;
/* MTD / NAND */
struct nand_controller base;
struct nand_chip nand;
struct gpmi_transfer transfers[GPMI_MAX_TRANSFERS];
int ntransfers;
bool bch;
uint32_t bch_flashlayout0;
uint32_t bch_flashlayout1;
char *data_buffer_dma;
void *auxiliary_virt;
dma_addr_t auxiliary_phys;
void *raw_buffer;
/* DMA channels */
#define DMA_CHANS 8
struct dma_chan *dma_chans[DMA_CHANS];
struct completion dma_done;
};
/* BCH : Status Block Completion Codes */
#define STATUS_GOOD 0 x00
#define STATUS_ERASED 0 xff
#define STATUS_UNCORRECTABLE 0 xfe
/* Use the devdata to distinguish different Archs. */
#define GPMI_IS_MX23(x) ((x)->devdata->type == IS_MX23)
#define GPMI_IS_MX28(x) ((x)->devdata->type == IS_MX28)
#define GPMI_IS_MX6Q(x) ((x)->devdata->type == IS_MX6Q)
#define GPMI_IS_MX6SX(x) ((x)->devdata->type == IS_MX6SX)
#define GPMI_IS_MX7D(x) ((x)->devdata->type == IS_MX7D)
#define GPMI_IS_MX8QXP(x) ((x)->devdata->type == IS_MX8QXP)
#define GPMI_IS_MX6(x) (GPMI_IS_MX6Q(x) || GPMI_IS_MX6SX(x) || \
GPMI_IS_MX7D(x) || GPMI_IS_MX8QXP(x))
#define GPMI_IS_MXS(x) (GPMI_IS_MX23(x) || GPMI_IS_MX28(x))
#endif
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