1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Freescale GPMI NAND Flash Driver
5 * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
6 * Copyright (C) 2008 Embedded Alley Solutions, Inc.
8 #ifndef __DRIVERS_MTD_NAND_GPMI_NAND_H
9 #define __DRIVERS_MTD_NAND_GPMI_NAND_H
11 #include <linux/mtd/rawnand.h>
12 #include <linux/platform_device.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/dmaengine.h>
16 #define GPMI_CLK_MAX 5 /* MX6Q needs five clocks */
18 void __iomem *gpmi_regs;
19 void __iomem *bch_regs;
20 unsigned int dma_low_channel;
21 unsigned int dma_high_channel;
22 struct clk *clock[GPMI_CLK_MAX];
26 * struct bch_geometry - BCH geometry description.
27 * @gf_len: The length of Galois Field. (e.g., 13 or 14)
28 * @ecc_strength: A number that describes the strength of the ECC
30 * @page_size: The size, in bytes, of a physical page, including
32 * @metadata_size: The size, in bytes, of the metadata.
33 * @ecc_chunk_size: The size, in bytes, of a single ECC chunk. Note
34 * the first chunk in the page includes both data and
35 * metadata, so it's a bit larger than this value.
36 * @ecc_chunk_count: The number of ECC chunks in the page,
37 * @payload_size: The size, in bytes, of the payload buffer.
38 * @auxiliary_size: The size, in bytes, of the auxiliary buffer.
39 * @auxiliary_status_offset: The offset into the auxiliary buffer at which
40 * the ECC status appears.
41 * @block_mark_byte_offset: The byte offset in the ECC-based page view at
42 * which the underlying physical block mark appears.
43 * @block_mark_bit_offset: The bit offset into the ECC-based page view at
44 * which the underlying physical block mark appears.
48 unsigned int ecc_strength;
49 unsigned int page_size;
50 unsigned int metadata_size;
51 unsigned int ecc_chunk_size;
52 unsigned int ecc_chunk_count;
53 unsigned int payload_size;
54 unsigned int auxiliary_size;
55 unsigned int auxiliary_status_offset;
56 unsigned int block_mark_byte_offset;
57 unsigned int block_mark_bit_offset;
61 * struct boot_rom_geometry - Boot ROM geometry description.
62 * @stride_size_in_pages: The size of a boot block stride, in pages.
63 * @search_area_stride_exponent: The logarithm to base 2 of the size of a
64 * search area in boot block strides.
66 struct boot_rom_geometry {
67 unsigned int stride_size_in_pages;
68 unsigned int search_area_stride_exponent;
81 int bch_max_ecc_strength;
82 int max_chain_delay; /* See the async EDO mode */
83 const char * const *clks;
88 * struct gpmi_nfc_hardware_timing - GPMI hardware timing parameters.
89 * @must_apply_timings: Whether controller timings have already been
90 * applied or not (useful only while there is
91 * support for only one chip select)
92 * @clk_rate: The clock rate that must be used to derive the
93 * following parameters
94 * @timing0: HW_GPMI_TIMING0 register
95 * @timing1: HW_GPMI_TIMING1 register
96 * @ctrl1n: HW_GPMI_CTRL1n register
98 struct gpmi_nfc_hardware_timing {
99 bool must_apply_timings;
100 unsigned long int clk_rate;
106 struct gpmi_nand_data {
108 const struct gpmi_devdata *devdata;
110 /* System Interface */
112 struct platform_device *pdev;
115 struct resources resources;
118 struct gpmi_nfc_hardware_timing hw;
121 struct bch_geometry bch_geometry;
122 struct completion bch_done;
124 /* NAND Boot issue */
125 bool swap_block_mark;
126 struct boot_rom_geometry rom_geometry;
129 struct nand_chip nand;
131 /* General-use Variables */
133 unsigned int command_length;
135 struct scatterlist cmd_sgl;
138 struct scatterlist data_sgl;
139 char *data_buffer_dma;
141 void *page_buffer_virt;
142 dma_addr_t page_buffer_phys;
143 unsigned int page_buffer_size;
146 dma_addr_t payload_phys;
148 void *auxiliary_virt;
149 dma_addr_t auxiliary_phys;
155 struct dma_chan *dma_chans[DMA_CHANS];
156 struct completion dma_done;
162 /* Common Services */
163 int common_nfc_set_geometry(struct gpmi_nand_data *);
164 struct dma_chan *get_dma_chan(struct gpmi_nand_data *);
165 bool prepare_data_dma(struct gpmi_nand_data *, const void *buf, int len,
166 enum dma_data_direction dr);
167 int start_dma_without_bch_irq(struct gpmi_nand_data *,
168 struct dma_async_tx_descriptor *);
169 int start_dma_with_bch_irq(struct gpmi_nand_data *,
170 struct dma_async_tx_descriptor *);
172 /* GPMI-NAND helper function library */
173 int gpmi_init(struct gpmi_nand_data *);
174 void gpmi_clear_bch(struct gpmi_nand_data *);
175 void gpmi_dump_info(struct gpmi_nand_data *);
176 int bch_set_geometry(struct gpmi_nand_data *);
177 int gpmi_is_ready(struct gpmi_nand_data *, unsigned chip);
178 int gpmi_send_command(struct gpmi_nand_data *);
179 int gpmi_enable_clk(struct gpmi_nand_data *this);
180 int gpmi_disable_clk(struct gpmi_nand_data *this);
181 int gpmi_setup_data_interface(struct nand_chip *chip, int chipnr,
182 const struct nand_data_interface *conf);
183 void gpmi_nfc_apply_timings(struct gpmi_nand_data *this);
184 int gpmi_read_data(struct gpmi_nand_data *, void *buf, int len);
185 int gpmi_send_data(struct gpmi_nand_data *, const void *buf, int len);
187 int gpmi_send_page(struct gpmi_nand_data *,
188 dma_addr_t payload, dma_addr_t auxiliary);
189 int gpmi_read_page(struct gpmi_nand_data *,
190 dma_addr_t payload, dma_addr_t auxiliary);
192 void gpmi_copy_bits(u8 *dst, size_t dst_bit_off,
193 const u8 *src, size_t src_bit_off,
196 /* BCH : Status Block Completion Codes */
197 #define STATUS_GOOD 0x00
198 #define STATUS_ERASED 0xff
199 #define STATUS_UNCORRECTABLE 0xfe
201 /* Use the devdata to distinguish different Archs. */
202 #define GPMI_IS_MX23(x) ((x)->devdata->type == IS_MX23)
203 #define GPMI_IS_MX28(x) ((x)->devdata->type == IS_MX28)
204 #define GPMI_IS_MX6Q(x) ((x)->devdata->type == IS_MX6Q)
205 #define GPMI_IS_MX6SX(x) ((x)->devdata->type == IS_MX6SX)
206 #define GPMI_IS_MX7D(x) ((x)->devdata->type == IS_MX7D)
208 #define GPMI_IS_MX6(x) (GPMI_IS_MX6Q(x) || GPMI_IS_MX6SX(x) || \
210 #define GPMI_IS_MXS(x) (GPMI_IS_MX23(x) || GPMI_IS_MX28(x))