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Add helper functions for atmel Static Memory Controller. The functions are required to configure SMC. This file is inherited from the work done by Boris Brezillon for Linux Signed-off-by: Balamanikandan Gunasundar <balamanikandan.gunasundar@microchip.com>
119 lines
4.5 KiB
C
119 lines
4.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Atmel SMC (Static Memory Controller) register offsets and bit definitions.
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*
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* Copyright (C) 2014 Atmel
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* Copyright (C) 2014 Free Electrons
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*
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* Author: Boris Brezillon <boris.brezillon@free-electrons.com>
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*/
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#ifndef _LINUX_MFD_SYSCON_ATMEL_SMC_H_
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#define _LINUX_MFD_SYSCON_ATMEL_SMC_H_
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#include <linux/kernel.h>
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#include <dm/ofnode.h>
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#include <regmap.h>
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#define ATMEL_SMC_SETUP(cs) (((cs) * 0x10))
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#define ATMEL_HSMC_SETUP(layout, cs) \
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((layout)->timing_regs_offset + ((cs) * 0x14))
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#define ATMEL_SMC_PULSE(cs) (((cs) * 0x10) + 0x4)
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#define ATMEL_HSMC_PULSE(layout, cs) \
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((layout)->timing_regs_offset + ((cs) * 0x14) + 0x4)
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#define ATMEL_SMC_CYCLE(cs) (((cs) * 0x10) + 0x8)
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#define ATMEL_HSMC_CYCLE(layout, cs) \
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((layout)->timing_regs_offset + ((cs) * 0x14) + 0x8)
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#define ATMEL_SMC_NWE_SHIFT 0
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#define ATMEL_SMC_NCS_WR_SHIFT 8
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#define ATMEL_SMC_NRD_SHIFT 16
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#define ATMEL_SMC_NCS_RD_SHIFT 24
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#define ATMEL_SMC_MODE(cs) (((cs) * 0x10) + 0xc)
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#define ATMEL_HSMC_MODE(layout, cs) \
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((layout)->timing_regs_offset + ((cs) * 0x14) + 0x10)
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#define ATMEL_SMC_MODE_READMODE_MASK BIT(0)
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#define ATMEL_SMC_MODE_READMODE_NCS (0 << 0)
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#define ATMEL_SMC_MODE_READMODE_NRD (1 << 0)
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#define ATMEL_SMC_MODE_WRITEMODE_MASK BIT(1)
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#define ATMEL_SMC_MODE_WRITEMODE_NCS (0 << 1)
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#define ATMEL_SMC_MODE_WRITEMODE_NWE (1 << 1)
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#define ATMEL_SMC_MODE_EXNWMODE_MASK GENMASK(5, 4)
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#define ATMEL_SMC_MODE_EXNWMODE_DISABLE (0 << 4)
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#define ATMEL_SMC_MODE_EXNWMODE_FROZEN (2 << 4)
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#define ATMEL_SMC_MODE_EXNWMODE_READY (3 << 4)
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#define ATMEL_SMC_MODE_BAT_MASK BIT(8)
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#define ATMEL_SMC_MODE_BAT_SELECT (0 << 8)
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#define ATMEL_SMC_MODE_BAT_WRITE (1 << 8)
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#define ATMEL_SMC_MODE_DBW_MASK GENMASK(13, 12)
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#define ATMEL_SMC_MODE_DBW_8 (0 << 12)
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#define ATMEL_SMC_MODE_DBW_16 (1 << 12)
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#define ATMEL_SMC_MODE_DBW_32 (2 << 12)
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#define ATMEL_SMC_MODE_TDF_MASK GENMASK(19, 16)
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#define ATMEL_SMC_MODE_TDF(x) (((x) - 1) << 16)
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#define ATMEL_SMC_MODE_TDF_MAX 16
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#define ATMEL_SMC_MODE_TDF_MIN 1
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#define ATMEL_SMC_MODE_TDFMODE_OPTIMIZED BIT(20)
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#define ATMEL_SMC_MODE_PMEN BIT(24)
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#define ATMEL_SMC_MODE_PS_MASK GENMASK(29, 28)
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#define ATMEL_SMC_MODE_PS_4 (0 << 28)
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#define ATMEL_SMC_MODE_PS_8 (1 << 28)
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#define ATMEL_SMC_MODE_PS_16 (2 << 28)
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#define ATMEL_SMC_MODE_PS_32 (3 << 28)
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#define ATMEL_HSMC_TIMINGS(layout, cs) \
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((layout)->timing_regs_offset + ((cs) * 0x14) + 0xc)
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#define ATMEL_HSMC_TIMINGS_OCMS BIT(12)
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#define ATMEL_HSMC_TIMINGS_RBNSEL(x) ((x) << 28)
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#define ATMEL_HSMC_TIMINGS_NFSEL BIT(31)
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#define ATMEL_HSMC_TIMINGS_TCLR_SHIFT 0
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#define ATMEL_HSMC_TIMINGS_TADL_SHIFT 4
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#define ATMEL_HSMC_TIMINGS_TAR_SHIFT 8
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#define ATMEL_HSMC_TIMINGS_TRR_SHIFT 16
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#define ATMEL_HSMC_TIMINGS_TWB_SHIFT 24
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struct atmel_hsmc_reg_layout {
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unsigned int timing_regs_offset;
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};
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/**
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* struct atmel_smc_cs_conf - SMC CS config as described in the datasheet.
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* @setup: NCS/NWE/NRD setup timings (not applicable to at91rm9200)
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* @pulse: NCS/NWE/NRD pulse timings (not applicable to at91rm9200)
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* @cycle: NWE/NRD cycle timings (not applicable to at91rm9200)
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* @timings: advanced NAND related timings (only applicable to HSMC)
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* @mode: all kind of config parameters (see the fields definition above).
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* The mode fields are different on at91rm9200
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*/
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struct atmel_smc_cs_conf {
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u32 setup;
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u32 pulse;
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u32 cycle;
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u32 timings;
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u32 mode;
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};
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void atmel_smc_cs_conf_init(struct atmel_smc_cs_conf *conf);
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int atmel_smc_cs_conf_set_timing(struct atmel_smc_cs_conf *conf,
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unsigned int shift,
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unsigned int ncycles);
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int atmel_smc_cs_conf_set_setup(struct atmel_smc_cs_conf *conf,
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unsigned int shift, unsigned int ncycles);
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int atmel_smc_cs_conf_set_pulse(struct atmel_smc_cs_conf *conf,
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unsigned int shift, unsigned int ncycles);
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int atmel_smc_cs_conf_set_cycle(struct atmel_smc_cs_conf *conf,
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unsigned int shift, unsigned int ncycles);
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void atmel_smc_cs_conf_apply(struct regmap *regmap, int cs,
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const struct atmel_smc_cs_conf *conf);
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void atmel_hsmc_cs_conf_apply(struct regmap *regmap,
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const struct atmel_hsmc_reg_layout *reglayout,
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int cs, const struct atmel_smc_cs_conf *conf);
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void atmel_smc_cs_conf_get(struct regmap *regmap, int cs,
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struct atmel_smc_cs_conf *conf);
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void atmel_hsmc_cs_conf_get(struct regmap *regmap,
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const struct atmel_hsmc_reg_layout *reglayout,
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int cs, struct atmel_smc_cs_conf *conf);
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const struct atmel_hsmc_reg_layout *
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atmel_hsmc_get_reg_layout(ofnode np);
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#endif /* _LINUX_MFD_SYSCON_ATMEL_SMC_H_ */
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