diff options
Diffstat (limited to 'drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h')
| -rw-r--r-- | drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h new file mode 100644 index 000000000..c3ff56ac6 --- /dev/null +++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h @@ -0,0 +1,179 @@ +/* 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, +}; + +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; +}; + +/** + * 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 0x00 +#define STATUS_ERASED 0xff +#define STATUS_UNCORRECTABLE 0xfe + +/* 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_MX6(x) (GPMI_IS_MX6Q(x) || GPMI_IS_MX6SX(x) || \ + GPMI_IS_MX7D(x)) +#define GPMI_IS_MXS(x) (GPMI_IS_MX23(x) || GPMI_IS_MX28(x)) +#endif |