1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Core pinctrl/GPIO driver for Intel GPIO controllers 4 * 5 * Copyright (C) 2015, Intel Corporation 6 * Authors: Mathias Nyman <mathias.nyman@linux.intel.com> 7 * Mika Westerberg <mika.westerberg@linux.intel.com> 8 */ 9 10 #ifndef PINCTRL_INTEL_H 11 #define PINCTRL_INTEL_H 12 13 #include <linux/bits.h> 14 #include <linux/compiler_types.h> 15 #include <linux/gpio/driver.h> 16 #include <linux/irq.h> 17 #include <linux/kernel.h> 18 #include <linux/pm.h> 19 #include <linux/pinctrl/pinctrl.h> 20 #include <linux/spinlock_types.h> 21 22 struct platform_device; 23 struct device; 24 25 /** 26 * struct intel_pingroup - Description about group of pins 27 * @name: Name of the groups 28 * @pins: All pins in this group 29 * @npins: Number of pins in this groups 30 * @mode: Native mode in which the group is muxed out @pins. Used if @modes 31 * is %NULL. 32 * @modes: If not %NULL this will hold mode for each pin in @pins 33 */ 34 struct intel_pingroup { 35 const char *name; 36 const unsigned int *pins; 37 size_t npins; 38 unsigned short mode; 39 const unsigned int *modes; 40 }; 41 42 /** 43 * struct intel_function - Description about a function 44 * @name: Name of the function 45 * @groups: An array of groups for this function 46 * @ngroups: Number of groups in @groups 47 */ 48 struct intel_function { 49 const char *name; 50 const char * const *groups; 51 size_t ngroups; 52 }; 53 54 /** 55 * struct intel_padgroup - Hardware pad group information 56 * @reg_num: GPI_IS register number 57 * @base: Starting pin of this group 58 * @size: Size of this group (maximum is 32). 59 * @gpio_base: Starting GPIO base of this group 60 * @padown_num: PAD_OWN register number (assigned by the core driver) 61 * 62 * If pad groups of a community are not the same size, use this structure 63 * to specify them. 64 */ 65 struct intel_padgroup { 66 unsigned int reg_num; 67 unsigned int base; 68 unsigned int size; 69 int gpio_base; 70 unsigned int padown_num; 71 }; 72 73 /** 74 * enum - Special treatment for GPIO base in pad group 75 * 76 * @INTEL_GPIO_BASE_ZERO: force GPIO base to be 0 77 * @INTEL_GPIO_BASE_NOMAP: no GPIO mapping should be created 78 * @INTEL_GPIO_BASE_MATCH: matches with starting pin number 79 */ 80 enum { 81 INTEL_GPIO_BASE_ZERO = -2, 82 INTEL_GPIO_BASE_NOMAP = -1, 83 INTEL_GPIO_BASE_MATCH = 0, 84 }; 85 86 /** 87 * struct intel_community - Intel pin community description 88 * @barno: MMIO BAR number where registers for this community reside 89 * @padown_offset: Register offset of PAD_OWN register from @regs. If %0 90 * then there is no support for owner. 91 * @padcfglock_offset: Register offset of PADCFGLOCK from @regs. If %0 then 92 * locking is not supported. 93 * @hostown_offset: Register offset of HOSTSW_OWN from @regs. If %0 then it 94 * is assumed that the host owns the pin (rather than 95 * ACPI). 96 * @is_offset: Register offset of GPI_IS from @regs. 97 * @ie_offset: Register offset of GPI_IE from @regs. 98 * @features: Additional features supported by the hardware 99 * @pin_base: Starting pin of pins in this community 100 * @npins: Number of pins in this community 101 * @gpp_size: Maximum number of pads in each group, such as PADCFGLOCK, 102 * HOSTSW_OWN, GPI_IS, GPI_IE. Used when @gpps is %NULL. 103 * @gpp_num_padown_regs: Number of pad registers each pad group consumes at 104 * minimum. Use %0 if the number of registers can be 105 * determined by the size of the group. 106 * @gpps: Pad groups if the controller has variable size pad groups 107 * @ngpps: Number of pad groups in this community 108 * @pad_map: Optional non-linear mapping of the pads 109 * @nirqs: Optional total number of IRQs this community can generate 110 * @acpi_space_id: Optional address space ID for ACPI OpRegion handler 111 * @regs: Community specific common registers (reserved for core driver) 112 * @pad_regs: Community specific pad registers (reserved for core driver) 113 * 114 * In some of Intel GPIO host controllers this driver supports each pad group 115 * is of equal size (except the last one). In that case the driver can just 116 * fill in @gpp_size field and let the core driver to handle the rest. If 117 * the controller has pad groups of variable size the client driver can 118 * pass custom @gpps and @ngpps instead. 119 */ 120 struct intel_community { 121 unsigned int barno; 122 unsigned int padown_offset; 123 unsigned int padcfglock_offset; 124 unsigned int hostown_offset; 125 unsigned int is_offset; 126 unsigned int ie_offset; 127 unsigned int features; 128 unsigned int pin_base; 129 size_t npins; 130 unsigned int gpp_size; 131 unsigned int gpp_num_padown_regs; 132 const struct intel_padgroup *gpps; 133 size_t ngpps; 134 const unsigned int *pad_map; 135 unsigned short nirqs; 136 unsigned short acpi_space_id; 137 138 /* Reserved for the core driver */ 139 void __iomem *regs; 140 void __iomem *pad_regs; 141 }; 142 143 /* Additional features supported by the hardware */ 144 #define PINCTRL_FEATURE_DEBOUNCE BIT(0) 145 #define PINCTRL_FEATURE_1K_PD BIT(1) 146 #define PINCTRL_FEATURE_GPIO_HW_INFO BIT(2) 147 #define PINCTRL_FEATURE_PWM BIT(3) 148 #define PINCTRL_FEATURE_BLINK BIT(4) 149 #define PINCTRL_FEATURE_EXP BIT(5) 150 151 /** 152 * PIN_GROUP - Declare a pin group 153 * @n: Name of the group 154 * @p: An array of pins this group consists 155 * @m: Mode which the pins are put when this group is active. Can be either 156 * a single integer or an array of integers in which case mode is per 157 * pin. 158 */ 159 #define PIN_GROUP(n, p, m) \ 160 { \ 161 .name = (n), \ 162 .pins = (p), \ 163 .npins = ARRAY_SIZE((p)), \ 164 .mode = __builtin_choose_expr( \ 165 __builtin_constant_p((m)), (m), 0), \ 166 .modes = __builtin_choose_expr( \ 167 __builtin_constant_p((m)), NULL, (m)), \ 168 } 169 170 #define FUNCTION(n, g) \ 171 { \ 172 .name = (n), \ 173 .groups = (g), \ 174 .ngroups = ARRAY_SIZE((g)), \ 175 } 176 177 /** 178 * struct intel_pinctrl_soc_data - Intel pin controller per-SoC configuration 179 * @uid: ACPI _UID for the probe driver use if needed 180 * @pins: Array if pins this pinctrl controls 181 * @npins: Number of pins in the array 182 * @groups: Array of pin groups 183 * @ngroups: Number of groups in the array 184 * @functions: Array of functions 185 * @nfunctions: Number of functions in the array 186 * @communities: Array of communities this pinctrl handles 187 * @ncommunities: Number of communities in the array 188 * 189 * The @communities is used as a template by the core driver. It will make 190 * copy of all communities and fill in rest of the information. 191 */ 192 struct intel_pinctrl_soc_data { 193 const char *uid; 194 const struct pinctrl_pin_desc *pins; 195 size_t npins; 196 const struct intel_pingroup *groups; 197 size_t ngroups; 198 const struct intel_function *functions; 199 size_t nfunctions; 200 const struct intel_community *communities; 201 size_t ncommunities; 202 }; 203 204 const struct intel_pinctrl_soc_data *intel_pinctrl_get_soc_data(struct platform_device *pdev); 205 206 struct intel_pad_context; 207 struct intel_community_context; 208 209 /** 210 * struct intel_pinctrl_context - context to be saved during suspend-resume 211 * @pads: Opaque context per pad (driver dependent) 212 * @communities: Opaque context per community (driver dependent) 213 */ 214 struct intel_pinctrl_context { 215 struct intel_pad_context *pads; 216 struct intel_community_context *communities; 217 }; 218 219 /** 220 * struct intel_pinctrl - Intel pinctrl private structure 221 * @dev: Pointer to the device structure 222 * @lock: Lock to serialize register access 223 * @pctldesc: Pin controller description 224 * @pctldev: Pointer to the pin controller device 225 * @chip: GPIO chip in this pin controller 226 * @soc: SoC/PCH specific pin configuration data 227 * @communities: All communities in this pin controller 228 * @ncommunities: Number of communities in this pin controller 229 * @context: Configuration saved over system sleep 230 * @irq: pinctrl/GPIO chip irq number 231 */ 232 struct intel_pinctrl { 233 struct device *dev; 234 raw_spinlock_t lock; 235 struct pinctrl_desc pctldesc; 236 struct pinctrl_dev *pctldev; 237 struct gpio_chip chip; 238 const struct intel_pinctrl_soc_data *soc; 239 struct intel_community *communities; 240 size_t ncommunities; 241 struct intel_pinctrl_context context; 242 int irq; 243 }; 244 245 int intel_pinctrl_probe_by_hid(struct platform_device *pdev); 246 int intel_pinctrl_probe_by_uid(struct platform_device *pdev); 247 248 #ifdef CONFIG_PM_SLEEP 249 int intel_pinctrl_suspend_noirq(struct device *dev); 250 int intel_pinctrl_resume_noirq(struct device *dev); 251 #endif 252 253 #define INTEL_PINCTRL_PM_OPS(_name) \ 254 const struct dev_pm_ops _name = { \ 255 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(intel_pinctrl_suspend_noirq, \ 256 intel_pinctrl_resume_noirq) \ 257 } 258 259 #endif /* PINCTRL_INTEL_H */ 260