include/linux/mfd/syscon/atmel-smc.h

   1 /*
   2  * Atmel SMC (Static Memory Controller) register offsets and bit definitions.
   3  *
   4  * Copyright (C) 2014 Atmel
   5  * Copyright (C) 2014 Free Electrons
   6  *
   7  * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #ifndef _LINUX_MFD_SYSCON_ATMEL_SMC_H_
  15 #define _LINUX_MFD_SYSCON_ATMEL_SMC_H_
  16
  17 #include <linux/kernel.h>
  18 #include <linux/of.h>
  19 #include <linux/regmap.h>
  20
  21 #define ATMEL_SMC_SETUP(cs)                     (((cs) * 0x10))
  22 #define ATMEL_HSMC_SETUP(layout, cs)            \
  23         ((layout)->timing_regs_offset + ((cs) * 0x14))
  24 #define ATMEL_SMC_PULSE(cs)                     (((cs) * 0x10) + 0x4)
  25 #define ATMEL_HSMC_PULSE(layout, cs)            \
  26         ((layout)->timing_regs_offset + ((cs) * 0x14) + 0x4)
  27 #define ATMEL_SMC_CYCLE(cs)                     (((cs) * 0x10) + 0x8)
  28 #define ATMEL_HSMC_CYCLE(layout, cs)                    \
  29         ((layout)->timing_regs_offset + ((cs) * 0x14) + 0x8)
  30 #define ATMEL_SMC_NWE_SHIFT                     0
  31 #define ATMEL_SMC_NCS_WR_SHIFT                  8
  32 #define ATMEL_SMC_NRD_SHIFT                     16
  33 #define ATMEL_SMC_NCS_RD_SHIFT                  24
  34
  35 #define ATMEL_SMC_MODE(cs)                      (((cs) * 0x10) + 0xc)
  36 #define ATMEL_HSMC_MODE(layout, cs)                     \
  37         ((layout)->timing_regs_offset + ((cs) * 0x14) + 0x10)
  38 #define ATMEL_SMC_MODE_READMODE_MASK            BIT(0)
  39 #define ATMEL_SMC_MODE_READMODE_NCS             (0 << 0)
  40 #define ATMEL_SMC_MODE_READMODE_NRD             (1 << 0)
  41 #define ATMEL_SMC_MODE_WRITEMODE_MASK           BIT(1)
  42 #define ATMEL_SMC_MODE_WRITEMODE_NCS            (0 << 1)
  43 #define ATMEL_SMC_MODE_WRITEMODE_NWE            (1 << 1)
  44 #define ATMEL_SMC_MODE_EXNWMODE_MASK            GENMASK(5, 4)
  45 #define ATMEL_SMC_MODE_EXNWMODE_DISABLE         (0 << 4)
  46 #define ATMEL_SMC_MODE_EXNWMODE_FROZEN          (2 << 4)
  47 #define ATMEL_SMC_MODE_EXNWMODE_READY           (3 << 4)
  48 #define ATMEL_SMC_MODE_BAT_MASK                 BIT(8)
  49 #define ATMEL_SMC_MODE_BAT_SELECT               (0 << 8)
  50 #define ATMEL_SMC_MODE_BAT_WRITE                (1 << 8)
  51 #define ATMEL_SMC_MODE_DBW_MASK                 GENMASK(13, 12)
  52 #define ATMEL_SMC_MODE_DBW_8                    (0 << 12)
  53 #define ATMEL_SMC_MODE_DBW_16                   (1 << 12)
  54 #define ATMEL_SMC_MODE_DBW_32                   (2 << 12)
  55 #define ATMEL_SMC_MODE_TDF_MASK                 GENMASK(19, 16)
  56 #define ATMEL_SMC_MODE_TDF(x)                   (((x) - 1) << 16)
  57 #define ATMEL_SMC_MODE_TDF_MAX                  16
  58 #define ATMEL_SMC_MODE_TDF_MIN                  1
  59 #define ATMEL_SMC_MODE_TDFMODE_OPTIMIZED        BIT(20)
  60 #define ATMEL_SMC_MODE_PMEN                     BIT(24)
  61 #define ATMEL_SMC_MODE_PS_MASK                  GENMASK(29, 28)
  62 #define ATMEL_SMC_MODE_PS_4                     (0 << 28)
  63 #define ATMEL_SMC_MODE_PS_8                     (1 << 28)
  64 #define ATMEL_SMC_MODE_PS_16                    (2 << 28)
  65 #define ATMEL_SMC_MODE_PS_32                    (3 << 28)
  66
  67 #define ATMEL_HSMC_TIMINGS(layout, cs)                  \
  68         ((layout)->timing_regs_offset + ((cs) * 0x14) + 0xc)
  69 #define ATMEL_HSMC_TIMINGS_OCMS                 BIT(12)
  70 #define ATMEL_HSMC_TIMINGS_RBNSEL(x)            ((x) << 28)
  71 #define ATMEL_HSMC_TIMINGS_NFSEL                BIT(31)
  72 #define ATMEL_HSMC_TIMINGS_TCLR_SHIFT           0
  73 #define ATMEL_HSMC_TIMINGS_TADL_SHIFT           4
  74 #define ATMEL_HSMC_TIMINGS_TAR_SHIFT            8
  75 #define ATMEL_HSMC_TIMINGS_TRR_SHIFT            16
  76 #define ATMEL_HSMC_TIMINGS_TWB_SHIFT            24
  77
  78 struct atmel_hsmc_reg_layout {
  79         unsigned int timing_regs_offset;
  80 };
  81
  82 /**
  83  * struct atmel_smc_cs_conf - SMC CS config as described in the datasheet.
  84  * @setup: NCS/NWE/NRD setup timings (not applicable to at91rm9200)
  85  * @pulse: NCS/NWE/NRD pulse timings (not applicable to at91rm9200)
  86  * @cycle: NWE/NRD cycle timings (not applicable to at91rm9200)
  87  * @timings: advanced NAND related timings (only applicable to HSMC)
  88  * @mode: all kind of config parameters (see the fields definition above).
  89  *        The mode fields are different on at91rm9200
  90  */
  91 struct atmel_smc_cs_conf {
  92         u32 setup;
  93         u32 pulse;
  94         u32 cycle;
  95         u32 timings;
  96         u32 mode;
  97 };
  98
  99 void atmel_smc_cs_conf_init(struct atmel_smc_cs_conf *conf);
 100 int atmel_smc_cs_conf_set_timing(struct atmel_smc_cs_conf *conf,
 101                                  unsigned int shift,
 102                                  unsigned int ncycles);
 103 int atmel_smc_cs_conf_set_setup(struct atmel_smc_cs_conf *conf,
 104                                 unsigned int shift, unsigned int ncycles);
 105 int atmel_smc_cs_conf_set_pulse(struct atmel_smc_cs_conf *conf,
 106                                 unsigned int shift, unsigned int ncycles);
 107 int atmel_smc_cs_conf_set_cycle(struct atmel_smc_cs_conf *conf,
 108                                 unsigned int shift, unsigned int ncycles);
 109 void atmel_smc_cs_conf_apply(struct regmap *regmap, int cs,
 110                              const struct atmel_smc_cs_conf *conf);
 111 void atmel_hsmc_cs_conf_apply(struct regmap *regmap,
 112                               const struct atmel_hsmc_reg_layout *reglayout,
 113                               int cs, const struct atmel_smc_cs_conf *conf);
 114 void atmel_smc_cs_conf_get(struct regmap *regmap, int cs,
 115                            struct atmel_smc_cs_conf *conf);
 116 void atmel_hsmc_cs_conf_get(struct regmap *regmap,
 117                             const struct atmel_hsmc_reg_layout *reglayout,
 118                             int cs, struct atmel_smc_cs_conf *conf);
 119 const struct atmel_hsmc_reg_layout *
 120 atmel_hsmc_get_reg_layout(struct device_node *np);
 121
 122 #endif /* _LINUX_MFD_SYSCON_ATMEL_SMC_H_ */