1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * pin-controller/pin-mux/pin-config/gpio-driver for Samsung's SoC's. 4 * 5 * Copyright (c) 2012 Samsung Electronics Co., Ltd. 6 * http://www.samsung.com 7 * Copyright (c) 2012 Linaro Ltd 8 * http://www.linaro.org 9 * 10 * Author: Thomas Abraham <thomas.ab@samsung.com> 11 */ 12 13 #ifndef __PINCTRL_SAMSUNG_H 14 #define __PINCTRL_SAMSUNG_H 15 16 #include <linux/pinctrl/pinctrl.h> 17 #include <linux/pinctrl/pinmux.h> 18 #include <linux/pinctrl/pinconf.h> 19 #include <linux/pinctrl/consumer.h> 20 #include <linux/pinctrl/machine.h> 21 22 #include <linux/gpio/driver.h> 23 24 /** 25 * enum pincfg_type - possible pin configuration types supported. 26 * @PINCFG_TYPE_FUNC: Function configuration. 27 * @PINCFG_TYPE_DAT: Pin value configuration. 28 * @PINCFG_TYPE_PUD: Pull up/down configuration. 29 * @PINCFG_TYPE_DRV: Drive strength configuration. 30 * @PINCFG_TYPE_CON_PDN: Pin function in power down mode. 31 * @PINCFG_TYPE_PUD_PDN: Pull up/down configuration in power down mode. 32 */ 33 enum pincfg_type { 34 PINCFG_TYPE_FUNC, 35 PINCFG_TYPE_DAT, 36 PINCFG_TYPE_PUD, 37 PINCFG_TYPE_DRV, 38 PINCFG_TYPE_CON_PDN, 39 PINCFG_TYPE_PUD_PDN, 40 41 PINCFG_TYPE_NUM 42 }; 43 44 /* 45 * pin configuration (pull up/down and drive strength) type and its value are 46 * packed together into a 16-bits. The upper 8-bits represent the configuration 47 * type and the lower 8-bits hold the value of the configuration type. 48 */ 49 #define PINCFG_TYPE_MASK 0xFF 50 #define PINCFG_VALUE_SHIFT 8 51 #define PINCFG_VALUE_MASK (0xFF << PINCFG_VALUE_SHIFT) 52 #define PINCFG_PACK(type, value) (((value) << PINCFG_VALUE_SHIFT) | type) 53 #define PINCFG_UNPACK_TYPE(cfg) ((cfg) & PINCFG_TYPE_MASK) 54 #define PINCFG_UNPACK_VALUE(cfg) (((cfg) & PINCFG_VALUE_MASK) >> \ 55 PINCFG_VALUE_SHIFT) 56 /* 57 * Values for the pin CON register, choosing pin function. 58 * The basic set (input and output) are same between: S3C24xx, S3C64xx, S5PV210, 59 * Exynos ARMv7, Exynos ARMv8, Tesla FSD. 60 */ 61 #define PIN_CON_FUNC_INPUT 0x0 62 #define PIN_CON_FUNC_OUTPUT 0x1 63 64 /** 65 * enum eint_type - possible external interrupt types. 66 * @EINT_TYPE_NONE: bank does not support external interrupts 67 * @EINT_TYPE_GPIO: bank supportes external gpio interrupts 68 * @EINT_TYPE_WKUP: bank supportes external wakeup interrupts 69 * @EINT_TYPE_WKUP_MUX: bank supports multiplexed external wakeup interrupts 70 * 71 * Samsung GPIO controller groups all the available pins into banks. The pins 72 * in a pin bank can support external gpio interrupts or external wakeup 73 * interrupts or no interrupts at all. From a software perspective, the only 74 * difference between external gpio and external wakeup interrupts is that 75 * the wakeup interrupts can additionally wakeup the system if it is in 76 * suspended state. 77 */ 78 enum eint_type { 79 EINT_TYPE_NONE, 80 EINT_TYPE_GPIO, 81 EINT_TYPE_WKUP, 82 EINT_TYPE_WKUP_MUX, 83 }; 84 85 /* maximum length of a pin in pin descriptor (example: "gpa0-0") */ 86 #define PIN_NAME_LENGTH 10 87 88 #define PIN_GROUP(n, p, f) \ 89 { \ 90 .name = n, \ 91 .pins = p, \ 92 .num_pins = ARRAY_SIZE(p), \ 93 .func = f \ 94 } 95 96 #define PMX_FUNC(n, g) \ 97 { \ 98 .name = n, \ 99 .groups = g, \ 100 .num_groups = ARRAY_SIZE(g), \ 101 } 102 103 struct samsung_pinctrl_drv_data; 104 105 /** 106 * struct samsung_pin_bank_type: pin bank type description 107 * @fld_width: widths of configuration bitfields (0 if unavailable) 108 * @reg_offset: offsets of configuration registers (don't care of width is 0) 109 */ 110 struct samsung_pin_bank_type { 111 u8 fld_width[PINCFG_TYPE_NUM]; 112 u8 reg_offset[PINCFG_TYPE_NUM]; 113 }; 114 115 /** 116 * struct samsung_pin_bank_data: represent a controller pin-bank (init data). 117 * @type: type of the bank (register offsets and bitfield widths) 118 * @pctl_offset: starting offset of the pin-bank registers. 119 * @pctl_res_idx: index of base address for pin-bank registers. 120 * @nr_pins: number of pins included in this bank. 121 * @eint_func: function to set in CON register to configure pin as EINT. 122 * @eint_type: type of the external interrupt supported by the bank. 123 * @eint_mask: bit mask of pins which support EINT function. 124 * @eint_offset: SoC-specific EINT register or interrupt offset of bank. 125 * @eint_con_offset: ExynosAuto SoC-specific EINT control register offset of bank. 126 * @eint_mask_offset: ExynosAuto SoC-specific EINT mask register offset of bank. 127 * @eint_pend_offset: ExynosAuto SoC-specific EINT pend register offset of bank. 128 * @name: name to be prefixed for each pin in this pin bank. 129 */ 130 struct samsung_pin_bank_data { 131 const struct samsung_pin_bank_type *type; 132 u32 pctl_offset; 133 u8 pctl_res_idx; 134 u8 nr_pins; 135 u8 eint_func; 136 enum eint_type eint_type; 137 u32 eint_mask; 138 u32 eint_offset; 139 u32 eint_con_offset; 140 u32 eint_mask_offset; 141 u32 eint_pend_offset; 142 const char *name; 143 }; 144 145 /** 146 * struct samsung_pin_bank: represent a controller pin-bank. 147 * @type: type of the bank (register offsets and bitfield widths) 148 * @pctl_base: base address of the pin-bank registers 149 * @pctl_offset: starting offset of the pin-bank registers. 150 * @nr_pins: number of pins included in this bank. 151 * @eint_base: base address of the pin-bank EINT registers. 152 * @eint_func: function to set in CON register to configure pin as EINT. 153 * @eint_type: type of the external interrupt supported by the bank. 154 * @eint_mask: bit mask of pins which support EINT function. 155 * @eint_offset: SoC-specific EINT register or interrupt offset of bank. 156 * @eint_con_offset: ExynosAuto SoC-specific EINT register or interrupt offset of bank. 157 * @eint_mask_offset: ExynosAuto SoC-specific EINT mask register offset of bank. 158 * @eint_pend_offset: ExynosAuto SoC-specific EINT pend register offset of bank. 159 * @name: name to be prefixed for each pin in this pin bank. 160 * @id: id of the bank, propagated to the pin range. 161 * @pin_base: starting pin number of the bank. 162 * @soc_priv: per-bank private data for SoC-specific code. 163 * @of_node: OF node of the bank. 164 * @drvdata: link to controller driver data 165 * @irq_domain: IRQ domain of the bank. 166 * @gpio_chip: GPIO chip of the bank. 167 * @grange: linux gpio pin range supported by this bank. 168 * @irq_chip: link to irq chip for external gpio and wakeup interrupts. 169 * @slock: spinlock protecting bank registers 170 * @pm_save: saved register values during suspend 171 */ 172 struct samsung_pin_bank { 173 const struct samsung_pin_bank_type *type; 174 void __iomem *pctl_base; 175 u32 pctl_offset; 176 u8 nr_pins; 177 void __iomem *eint_base; 178 u8 eint_func; 179 enum eint_type eint_type; 180 u32 eint_mask; 181 u32 eint_offset; 182 u32 eint_con_offset; 183 u32 eint_mask_offset; 184 u32 eint_pend_offset; 185 const char *name; 186 u32 id; 187 188 u32 pin_base; 189 void *soc_priv; 190 struct fwnode_handle *fwnode; 191 struct samsung_pinctrl_drv_data *drvdata; 192 struct irq_domain *irq_domain; 193 struct gpio_chip gpio_chip; 194 struct pinctrl_gpio_range grange; 195 struct exynos_irq_chip *irq_chip; 196 raw_spinlock_t slock; 197 198 u32 pm_save[PINCFG_TYPE_NUM + 1]; /* +1 to handle double CON registers*/ 199 }; 200 201 /** 202 * struct samsung_retention_data: runtime pin-bank retention control data. 203 * @regs: array of PMU registers to control pad retention. 204 * @nr_regs: number of registers in @regs array. 205 * @value: value to store to registers to turn off retention. 206 * @refcnt: atomic counter if retention control affects more than one bank. 207 * @priv: retention control code private data 208 * @enable: platform specific callback to enter retention mode. 209 * @disable: platform specific callback to exit retention mode. 210 **/ 211 struct samsung_retention_ctrl { 212 const u32 *regs; 213 int nr_regs; 214 u32 value; 215 atomic_t *refcnt; 216 void *priv; 217 void (*enable)(struct samsung_pinctrl_drv_data *); 218 void (*disable)(struct samsung_pinctrl_drv_data *); 219 }; 220 221 /** 222 * struct samsung_retention_data: represent a pin-bank retention control data. 223 * @regs: array of PMU registers to control pad retention. 224 * @nr_regs: number of registers in @regs array. 225 * @value: value to store to registers to turn off retention. 226 * @refcnt: atomic counter if retention control affects more than one bank. 227 * @init: platform specific callback to initialize retention control. 228 **/ 229 struct samsung_retention_data { 230 const u32 *regs; 231 int nr_regs; 232 u32 value; 233 atomic_t *refcnt; 234 struct samsung_retention_ctrl *(*init)(struct samsung_pinctrl_drv_data *, 235 const struct samsung_retention_data *); 236 }; 237 238 /** 239 * struct samsung_pin_ctrl: represent a pin controller. 240 * @pin_banks: list of pin banks included in this controller. 241 * @nr_banks: number of pin banks. 242 * @nr_ext_resources: number of the extra base address for pin banks. 243 * @retention_data: configuration data for retention control. 244 * @eint_gpio_init: platform specific callback to setup the external gpio 245 * interrupts for the controller. 246 * @eint_wkup_init: platform specific callback to setup the external wakeup 247 * interrupts for the controller. 248 * @suspend: platform specific suspend callback, executed during pin controller 249 * device suspend, see samsung_pinctrl_suspend() 250 * @resume: platform specific resume callback, executed during pin controller 251 * device suspend, see samsung_pinctrl_resume() 252 * 253 * External wakeup interrupts must define at least eint_wkup_init, 254 * retention_data and suspend in order for proper suspend/resume to work. 255 */ 256 struct samsung_pin_ctrl { 257 const struct samsung_pin_bank_data *pin_banks; 258 unsigned int nr_banks; 259 unsigned int nr_ext_resources; 260 const struct samsung_retention_data *retention_data; 261 262 int (*eint_gpio_init)(struct samsung_pinctrl_drv_data *); 263 int (*eint_wkup_init)(struct samsung_pinctrl_drv_data *); 264 void (*suspend)(struct samsung_pinctrl_drv_data *); 265 void (*resume)(struct samsung_pinctrl_drv_data *); 266 }; 267 268 /** 269 * struct samsung_pinctrl_drv_data: wrapper for holding driver data together. 270 * @node: global list node 271 * @virt_base: register base address of the controller; this will be equal 272 * to each bank samsung_pin_bank->pctl_base and used on legacy 273 * platforms (like S3C24XX or S3C64XX) which has to access the base 274 * through samsung_pinctrl_drv_data, not samsung_pin_bank). 275 * @dev: device instance representing the controller. 276 * @irq: interrpt number used by the controller to notify gpio interrupts. 277 * @pclk: optional bus clock if required for accessing registers 278 * @ctrl: pin controller instance managed by the driver. 279 * @pctl: pin controller descriptor registered with the pinctrl subsystem. 280 * @pctl_dev: cookie representing pinctrl device instance. 281 * @pin_groups: list of pin groups available to the driver. 282 * @nr_groups: number of such pin groups. 283 * @pmx_functions: list of pin functions available to the driver. 284 * @nr_function: number of such pin functions. 285 * @nr_pins: number of pins supported by the controller. 286 * @retention_ctrl: retention control runtime data. 287 * @suspend: platform specific suspend callback, executed during pin controller 288 * device suspend, see samsung_pinctrl_suspend() 289 * @resume: platform specific resume callback, executed during pin controller 290 * device suspend, see samsung_pinctrl_resume() 291 */ 292 struct samsung_pinctrl_drv_data { 293 struct list_head node; 294 void __iomem *virt_base; 295 struct device *dev; 296 int irq; 297 struct clk *pclk; 298 299 struct pinctrl_desc pctl; 300 struct pinctrl_dev *pctl_dev; 301 302 const struct samsung_pin_group *pin_groups; 303 unsigned int nr_groups; 304 const struct samsung_pmx_func *pmx_functions; 305 unsigned int nr_functions; 306 307 struct samsung_pin_bank *pin_banks; 308 unsigned int nr_banks; 309 unsigned int nr_pins; 310 311 struct samsung_retention_ctrl *retention_ctrl; 312 313 void (*suspend)(struct samsung_pinctrl_drv_data *); 314 void (*resume)(struct samsung_pinctrl_drv_data *); 315 }; 316 317 /** 318 * struct samsung_pinctrl_of_match_data: OF match device specific configuration data. 319 * @ctrl: array of pin controller data. 320 * @num_ctrl: size of array @ctrl. 321 */ 322 struct samsung_pinctrl_of_match_data { 323 const struct samsung_pin_ctrl *ctrl; 324 unsigned int num_ctrl; 325 }; 326 327 /** 328 * struct samsung_pin_group: represent group of pins of a pinmux function. 329 * @name: name of the pin group, used to lookup the group. 330 * @pins: the pins included in this group. 331 * @num_pins: number of pins included in this group. 332 * @func: the function number to be programmed when selected. 333 */ 334 struct samsung_pin_group { 335 const char *name; 336 const unsigned int *pins; 337 u8 num_pins; 338 u8 func; 339 }; 340 341 /** 342 * struct samsung_pmx_func: represent a pin function. 343 * @name: name of the pin function, used to lookup the function. 344 * @groups: one or more names of pin groups that provide this function. 345 * @num_groups: number of groups included in @groups. 346 */ 347 struct samsung_pmx_func { 348 const char *name; 349 const char **groups; 350 u8 num_groups; 351 u32 val; 352 }; 353 354 /* list of all exported SoC specific data */ 355 extern const struct samsung_pinctrl_of_match_data exynos3250_of_data; 356 extern const struct samsung_pinctrl_of_match_data exynos4210_of_data; 357 extern const struct samsung_pinctrl_of_match_data exynos4x12_of_data; 358 extern const struct samsung_pinctrl_of_match_data exynos5250_of_data; 359 extern const struct samsung_pinctrl_of_match_data exynos5260_of_data; 360 extern const struct samsung_pinctrl_of_match_data exynos5410_of_data; 361 extern const struct samsung_pinctrl_of_match_data exynos5420_of_data; 362 extern const struct samsung_pinctrl_of_match_data exynos5433_of_data; 363 extern const struct samsung_pinctrl_of_match_data exynos7_of_data; 364 extern const struct samsung_pinctrl_of_match_data exynos7885_of_data; 365 extern const struct samsung_pinctrl_of_match_data exynos850_of_data; 366 extern const struct samsung_pinctrl_of_match_data exynosautov9_of_data; 367 extern const struct samsung_pinctrl_of_match_data exynosautov920_of_data; 368 extern const struct samsung_pinctrl_of_match_data fsd_of_data; 369 extern const struct samsung_pinctrl_of_match_data gs101_of_data; 370 extern const struct samsung_pinctrl_of_match_data s3c64xx_of_data; 371 extern const struct samsung_pinctrl_of_match_data s3c2412_of_data; 372 extern const struct samsung_pinctrl_of_match_data s3c2416_of_data; 373 extern const struct samsung_pinctrl_of_match_data s3c2440_of_data; 374 extern const struct samsung_pinctrl_of_match_data s3c2450_of_data; 375 extern const struct samsung_pinctrl_of_match_data s5pv210_of_data; 376 377 #endif /* __PINCTRL_SAMSUNG_H */ 378