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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b0f3ab20e7
For HSMC controller, the register layout depends on the device i.e. the
offset of setup, pulse, cycle, mode and timings registers is not the
same. An helper is added to provide the correct register layout.
Fixes: fe9d7cb22e ("mfd: syscon: atmel-smc: Add new helpers to ease
SMC regs manipulation")
Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
123 lines
4.7 KiB
C
123 lines
4.7 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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 <linux/of.h>
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#include <linux/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(struct device_node *np);
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#endif /* _LINUX_MFD_SYSCON_ATMEL_SMC_H_ */
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