drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2018 MediaTek Inc.
   4  *
   5  * Author: Sean Wang <sean.wang@mediatek.com>
   6  *
   7  */
   8
   9 #ifndef __PINCTRL_MTK_COMMON_V2_H
  10 #define __PINCTRL_MTK_COMMON_V2_H
  11
  12 #include <linux/gpio/driver.h>
  13
  14 #define MTK_INPUT      0
  15 #define MTK_OUTPUT     1
  16 #define MTK_DISABLE    0
  17 #define MTK_ENABLE     1
  18 #define MTK_PULLDOWN   0
  19 #define MTK_PULLUP     1
  20 #define MTK_PULL_PU_PD_TYPE             BIT(0)
  21 #define MTK_PULL_PULLSEL_TYPE           BIT(1)
  22 #define MTK_PULL_PUPD_R1R0_TYPE         BIT(2)
  23 /* MTK_PULL_RSEL_TYPE can select resistance and can be
  24  * turned on/off itself. But it can't be selected pull up/down
  25  */
  26 #define MTK_PULL_RSEL_TYPE              BIT(3)
  27 /* MTK_PULL_PU_PD_RSEL_TYPE is a type which is controlled by
  28  * MTK_PULL_PU_PD_TYPE and MTK_PULL_RSEL_TYPE.
  29  */
  30 #define MTK_PULL_PU_PD_RSEL_TYPE        (MTK_PULL_PU_PD_TYPE \
  31                                         | MTK_PULL_RSEL_TYPE)
  32 #define MTK_PULL_TYPE_MASK      (MTK_PULL_PU_PD_TYPE |\
  33                                  MTK_PULL_PULLSEL_TYPE |\
  34                                  MTK_PULL_PUPD_R1R0_TYPE |\
  35                                  MTK_PULL_RSEL_TYPE)
  36
  37 #define EINT_NA U16_MAX
  38 #define NO_EINT_SUPPORT EINT_NA
  39
  40 #define PIN_FIELD_CALC(_s_pin, _e_pin, _i_base, _s_addr, _x_addrs,      \
  41                        _s_bit, _x_bits, _sz_reg, _fixed) {              \
  42                 .s_pin = _s_pin,                                        \
  43                 .e_pin = _e_pin,                                        \
  44                 .i_base = _i_base,                                      \
  45                 .s_addr = _s_addr,                                      \
  46                 .x_addrs = _x_addrs,                                    \
  47                 .s_bit = _s_bit,                                        \
  48                 .x_bits = _x_bits,                                      \
  49                 .sz_reg = _sz_reg,                                      \
  50                 .fixed = _fixed,                                        \
  51         }
  52
  53 #define PIN_FIELD(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, _x_bits)   \
  54         PIN_FIELD_CALC(_s_pin, _e_pin, 0, _s_addr, _x_addrs, _s_bit,    \
  55                        _x_bits, 32, 0)
  56
  57 #define PINS_FIELD(_s_pin, _e_pin, _s_addr, _x_addrs, _s_bit, _x_bits)  \
  58         PIN_FIELD_CALC(_s_pin, _e_pin, 0, _s_addr, _x_addrs, _s_bit,    \
  59                        _x_bits, 32, 1)
  60
  61 #define PIN_RSEL(_s_pin, _e_pin, _rsel_index, _up_resl, _down_rsel) {   \
  62                 .s_pin = _s_pin,                                        \
  63                 .e_pin = _e_pin,                                        \
  64                 .rsel_index = _rsel_index,                              \
  65                 .up_rsel = _up_resl,                                    \
  66                 .down_rsel = _down_rsel,                                \
  67         }
  68
  69 /* List these attributes which could be modified for the pin */
  70 enum {
  71         PINCTRL_PIN_REG_MODE,
  72         PINCTRL_PIN_REG_DIR,
  73         PINCTRL_PIN_REG_DI,
  74         PINCTRL_PIN_REG_DO,
  75         PINCTRL_PIN_REG_SR,
  76         PINCTRL_PIN_REG_SMT,
  77         PINCTRL_PIN_REG_PD,
  78         PINCTRL_PIN_REG_PU,
  79         PINCTRL_PIN_REG_E4,
  80         PINCTRL_PIN_REG_E8,
  81         PINCTRL_PIN_REG_TDSEL,
  82         PINCTRL_PIN_REG_RDSEL,
  83         PINCTRL_PIN_REG_DRV,
  84         PINCTRL_PIN_REG_PUPD,
  85         PINCTRL_PIN_REG_R0,
  86         PINCTRL_PIN_REG_R1,
  87         PINCTRL_PIN_REG_IES,
  88         PINCTRL_PIN_REG_PULLEN,
  89         PINCTRL_PIN_REG_PULLSEL,
  90         PINCTRL_PIN_REG_DRV_EN,
  91         PINCTRL_PIN_REG_DRV_E0,
  92         PINCTRL_PIN_REG_DRV_E1,
  93         PINCTRL_PIN_REG_DRV_ADV,
  94         PINCTRL_PIN_REG_RSEL,
  95         PINCTRL_PIN_REG_MAX,
  96 };
  97
  98 /* Group the pins by the driving current */
  99 enum {
 100         DRV_FIXED,
 101         DRV_GRP0,
 102         DRV_GRP1,
 103         DRV_GRP2,
 104         DRV_GRP3,
 105         DRV_GRP4,
 106         DRV_GRP_MAX,
 107 };
 108
 109 static const char * const mtk_default_register_base_names[] __maybe_unused = {
 110         "base",
 111 };
 112
 113 /* struct mtk_pin_field - the structure that holds the information of the field
 114  *                        used to describe the attribute for the pin
 115  * @base:               the index pointing to the entry in base address list
 116  * @offset:             the register offset relative to the base address
 117  * @mask:               the mask used to filter out the field from the register
 118  * @bitpos:             the start bit relative to the register
 119  * @next:               the indication that the field would be extended to the
 120                         next register
 121  */
 122 struct mtk_pin_field {
 123         u8  index;
 124         u32 offset;
 125         u32 mask;
 126         u8  bitpos;
 127         u8  next;
 128 };
 129
 130 /* struct mtk_pin_field_calc - the structure that holds the range providing
 131  *                             the guide used to look up the relevant field
 132  * @s_pin:              the start pin within the range
 133  * @e_pin:              the end pin within the range
 134  * @i_base:             the index pointing to the entry in base address list
 135  * @s_addr:             the start address for the range
 136  * @x_addrs:            the address distance between two consecutive registers
 137  *                      within the range
 138  * @s_bit:              the start bit for the first register within the range
 139  * @x_bits:             the bit distance between two consecutive pins within
 140  *                      the range
 141  * @sz_reg:             the size of bits in a register
 142  * @fixed:              the consecutive pins share the same bits with the 1st
 143  *                      pin
 144  */
 145 struct mtk_pin_field_calc {
 146         u16 s_pin;
 147         u16 e_pin;
 148         u8  i_base;
 149         u32 s_addr;
 150         u8  x_addrs;
 151         u8  s_bit;
 152         u8  x_bits;
 153         u8  sz_reg;
 154         u8  fixed;
 155 };
 156
 157 /**
 158  * struct mtk_pin_rsel - the structure that provides bias resistance selection.
 159  * @s_pin:              the start pin within the rsel range
 160  * @e_pin:              the end pin within the rsel range
 161  * @rsel_index: the rsel bias resistance index
 162  * @up_rsel:    the pullup rsel bias resistance value
 163  * @down_rsel:  the pulldown rsel bias resistance value
 164  */
 165 struct mtk_pin_rsel {
 166         u16 s_pin;
 167         u16 e_pin;
 168         u16 rsel_index;
 169         u32 up_rsel;
 170         u32 down_rsel;
 171 };
 172
 173 /* struct mtk_pin_reg_calc - the structure that holds all ranges used to
 174  *                           determine which register the pin would make use of
 175  *                           for certain pin attribute.
 176  * @range:                   the start address for the range
 177  * @nranges:                 the number of items in the range
 178  */
 179 struct mtk_pin_reg_calc {
 180         const struct mtk_pin_field_calc *range;
 181         unsigned int nranges;
 182 };
 183
 184 /**
 185  * struct mtk_func_desc - the structure that providing information
 186  *                        all the funcs for this pin
 187  * @name:               the name of function
 188  * @muxval:             the mux to the function
 189  */
 190 struct mtk_func_desc {
 191         const char *name;
 192         u8 muxval;
 193 };
 194
 195 /**
 196  * struct mtk_eint_desc - the structure that providing information
 197  *                             for eint data per pin
 198  * @eint_m:             the eint mux for this pin
 199  * @eitn_n:             the eint number for this pin
 200  */
 201 struct mtk_eint_desc {
 202         u16 eint_m;
 203         u16 eint_n;
 204 };
 205
 206 /**
 207  * struct mtk_pin_desc - the structure that providing information
 208  *                             for each pin of chips
 209  * @number:             unique pin number from the global pin number space
 210  * @name:               name for this pin
 211  * @eint:               the eint data for this pin
 212  * @drv_n:              the index with the driving group
 213  * @funcs:              all available functions for this pins (only used in
 214  *                      those drivers compatible to pinctrl-mtk-common.c-like
 215  *                      ones)
 216  */
 217 struct mtk_pin_desc {
 218         unsigned int number;
 219         const char *name;
 220         struct mtk_eint_desc eint;
 221         u8 drv_n;
 222         struct mtk_func_desc *funcs;
 223 };
 224
 225 struct mtk_pinctrl_group {
 226         const char      *name;
 227         unsigned long   config;
 228         unsigned        pin;
 229 };
 230
 231 struct mtk_pinctrl;
 232
 233 /* struct mtk_pin_soc - the structure that holds SoC-specific data */
 234 struct mtk_pin_soc {
 235         const struct mtk_pin_reg_calc   *reg_cal;
 236         const struct mtk_pin_desc       *pins;
 237         unsigned int                    npins;
 238         const struct group_desc         *grps;
 239         unsigned int                    ngrps;
 240         const struct function_desc      *funcs;
 241         unsigned int                    nfuncs;
 242         const struct mtk_eint_regs      *eint_regs;
 243         const struct mtk_eint_hw        *eint_hw;
 244
 245         /* Specific parameters per SoC */
 246         u8                              gpio_m;
 247         bool                            ies_present;
 248         const char * const              *base_names;
 249         unsigned int                    nbase_names;
 250         const unsigned int              *pull_type;
 251         const struct mtk_pin_rsel       *pin_rsel;
 252         unsigned int                    npin_rsel;
 253
 254         /* Specific pinconfig operations */
 255         int (*bias_disable_set)(struct mtk_pinctrl *hw,
 256                                 const struct mtk_pin_desc *desc);
 257         int (*bias_disable_get)(struct mtk_pinctrl *hw,
 258                                 const struct mtk_pin_desc *desc, int *res);
 259         int (*bias_set)(struct mtk_pinctrl *hw,
 260                         const struct mtk_pin_desc *desc, bool pullup);
 261         int (*bias_get)(struct mtk_pinctrl *hw,
 262                         const struct mtk_pin_desc *desc, bool pullup, int *res);
 263
 264         int (*bias_set_combo)(struct mtk_pinctrl *hw,
 265                         const struct mtk_pin_desc *desc, u32 pullup, u32 arg);
 266         int (*bias_get_combo)(struct mtk_pinctrl *hw,
 267                         const struct mtk_pin_desc *desc, u32 *pullup, u32 *arg);
 268
 269         int (*drive_set)(struct mtk_pinctrl *hw,
 270                          const struct mtk_pin_desc *desc, u32 arg);
 271         int (*drive_get)(struct mtk_pinctrl *hw,
 272                          const struct mtk_pin_desc *desc, int *val);
 273
 274         int (*adv_pull_set)(struct mtk_pinctrl *hw,
 275                             const struct mtk_pin_desc *desc, bool pullup,
 276                             u32 arg);
 277         int (*adv_pull_get)(struct mtk_pinctrl *hw,
 278                             const struct mtk_pin_desc *desc, bool pullup,
 279                             u32 *val);
 280         int (*adv_drive_set)(struct mtk_pinctrl *hw,
 281                              const struct mtk_pin_desc *desc, u32 arg);
 282         int (*adv_drive_get)(struct mtk_pinctrl *hw,
 283                              const struct mtk_pin_desc *desc, u32 *val);
 284
 285         /* Specific driver data */
 286         void                            *driver_data;
 287 };
 288
 289 struct mtk_pinctrl {
 290         struct pinctrl_dev              *pctrl;
 291         void __iomem                    **base;
 292         u8                              nbase;
 293         struct device                   *dev;
 294         struct gpio_chip                chip;
 295         const struct mtk_pin_soc        *soc;
 296         struct mtk_eint                 *eint;
 297         struct mtk_pinctrl_group        *groups;
 298         const char          **grp_names;
 299         /* lock pin's register resource to avoid multiple threads issue*/
 300         spinlock_t lock;
 301         /* identify rsel setting by si unit or rsel define in dts node */
 302         bool rsel_si_unit;
 303 };
 304
 305 void mtk_rmw(struct mtk_pinctrl *pctl, u8 i, u32 reg, u32 mask, u32 set);
 306
 307 int mtk_hw_set_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 308                      int field, int value);
 309 int mtk_hw_get_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 310                      int field, int *value);
 311
 312 int mtk_build_eint(struct mtk_pinctrl *hw, struct platform_device *pdev);
 313
 314 int mtk_pinconf_bias_disable_set(struct mtk_pinctrl *hw,
 315                                  const struct mtk_pin_desc *desc);
 316 int mtk_pinconf_bias_disable_get(struct mtk_pinctrl *hw,
 317                                  const struct mtk_pin_desc *desc, int *res);
 318 int mtk_pinconf_bias_set(struct mtk_pinctrl *hw,
 319                          const struct mtk_pin_desc *desc, bool pullup);
 320 int mtk_pinconf_bias_get(struct mtk_pinctrl *hw,
 321                          const struct mtk_pin_desc *desc, bool pullup,
 322                          int *res);
 323
 324 int mtk_pinconf_bias_disable_set_rev1(struct mtk_pinctrl *hw,
 325                                       const struct mtk_pin_desc *desc);
 326 int mtk_pinconf_bias_disable_get_rev1(struct mtk_pinctrl *hw,
 327                                       const struct mtk_pin_desc *desc,
 328                                       int *res);
 329 int mtk_pinconf_bias_set_rev1(struct mtk_pinctrl *hw,
 330                               const struct mtk_pin_desc *desc, bool pullup);
 331 int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
 332                               const struct mtk_pin_desc *desc, bool pullup,
 333                               int *res);
 334 int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
 335                                 const struct mtk_pin_desc *desc,
 336                                 u32 pullup, u32 enable);
 337 int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
 338                               const struct mtk_pin_desc *desc,
 339                               u32 *pullup, u32 *enable);
 340
 341 int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
 342                           const struct mtk_pin_desc *desc, u32 arg);
 343 int mtk_pinconf_drive_get(struct mtk_pinctrl *hw,
 344                           const struct mtk_pin_desc *desc, int *val);
 345
 346 int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw,
 347                                const struct mtk_pin_desc *desc, u32 arg);
 348 int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
 349                                const struct mtk_pin_desc *desc, int *val);
 350
 351 int mtk_pinconf_drive_set_raw(struct mtk_pinctrl *hw,
 352                                const struct mtk_pin_desc *desc, u32 arg);
 353 int mtk_pinconf_drive_get_raw(struct mtk_pinctrl *hw,
 354                                const struct mtk_pin_desc *desc, int *val);
 355
 356 int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
 357                              const struct mtk_pin_desc *desc, bool pullup,
 358                              u32 arg);
 359 int mtk_pinconf_adv_pull_get(struct mtk_pinctrl *hw,
 360                              const struct mtk_pin_desc *desc, bool pullup,
 361                              u32 *val);
 362 int mtk_pinconf_adv_drive_set(struct mtk_pinctrl *hw,
 363                               const struct mtk_pin_desc *desc, u32 arg);
 364 int mtk_pinconf_adv_drive_get(struct mtk_pinctrl *hw,
 365                               const struct mtk_pin_desc *desc, u32 *val);
 366 int mtk_pinconf_adv_drive_set_raw(struct mtk_pinctrl *hw,
 367                                   const struct mtk_pin_desc *desc, u32 arg);
 368 int mtk_pinconf_adv_drive_get_raw(struct mtk_pinctrl *hw,
 369                                   const struct mtk_pin_desc *desc, u32 *val);
 370
 371 bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int gpio_n);
 372 #endif /* __PINCTRL_MTK_COMMON_V2_H */