1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_GPIO_NOMADIK_H
3 #define __LINUX_GPIO_NOMADIK_H
4
5 struct fwnode_handle;
6
7 /* Package definitions */
8 #define PINCTRL_NMK_STN8815 0
9 #define PINCTRL_NMK_DB8500 1
10
11 #define GPIO_BLOCK_SHIFT 5
12 #define NMK_GPIO_PER_CHIP BIT(GPIO_BLOCK_SHIFT)
13 #define NMK_MAX_BANKS DIV_ROUND_UP(512, NMK_GPIO_PER_CHIP)
14
15 /* Register in the logic block */
16 #define NMK_GPIO_DAT 0x00
17 #define NMK_GPIO_DATS 0x04
18 #define NMK_GPIO_DATC 0x08
19 #define NMK_GPIO_PDIS 0x0c
20 #define NMK_GPIO_DIR 0x10
21 #define NMK_GPIO_DIRS 0x14
22 #define NMK_GPIO_DIRC 0x18
23 #define NMK_GPIO_SLPC 0x1c
24 #define NMK_GPIO_AFSLA 0x20
25 #define NMK_GPIO_AFSLB 0x24
26 #define NMK_GPIO_LOWEMI 0x28
27
28 #define NMK_GPIO_RIMSC 0x40
29 #define NMK_GPIO_FIMSC 0x44
30 #define NMK_GPIO_IS 0x48
31 #define NMK_GPIO_IC 0x4c
32 #define NMK_GPIO_RWIMSC 0x50
33 #define NMK_GPIO_FWIMSC 0x54
34 #define NMK_GPIO_WKS 0x58
35 /* These appear in DB8540 and later ASICs */
36 #define NMK_GPIO_EDGELEVEL 0x5C
37 #define NMK_GPIO_LEVEL 0x60
38
39 /* Pull up/down values */
40 enum nmk_gpio_pull {
41 NMK_GPIO_PULL_NONE,
42 NMK_GPIO_PULL_UP,
43 NMK_GPIO_PULL_DOWN,
44 };
45
46 /* Sleep mode */
47 enum nmk_gpio_slpm {
48 NMK_GPIO_SLPM_INPUT,
49 NMK_GPIO_SLPM_WAKEUP_ENABLE = NMK_GPIO_SLPM_INPUT,
50 NMK_GPIO_SLPM_NOCHANGE,
51 NMK_GPIO_SLPM_WAKEUP_DISABLE = NMK_GPIO_SLPM_NOCHANGE,
52 };
53
54 struct nmk_gpio_chip {
55 struct gpio_chip chip;
56 void __iomem *addr;
57 struct clk *clk;
58 unsigned int bank;
59 void (*set_ioforce)(bool enable);
60 spinlock_t lock;
61 bool sleepmode;
62 bool is_mobileye_soc;
63 /* Keep track of configured edges */
64 u32 edge_rising;
65 u32 edge_falling;
66 u32 real_wake;
67 u32 rwimsc;
68 u32 fwimsc;
69 u32 rimsc;
70 u32 fimsc;
71 u32 pull_up;
72 u32 lowemi;
73 };
74
75 /* Alternate functions: function C is set in hw by setting both A and B */
76 #define NMK_GPIO_ALT_GPIO 0
77 #define NMK_GPIO_ALT_A 1
78 #define NMK_GPIO_ALT_B 2
79 #define NMK_GPIO_ALT_C (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
80
81 #define NMK_GPIO_ALT_CX_SHIFT 2
82 #define NMK_GPIO_ALT_C1 ((1<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
83 #define NMK_GPIO_ALT_C2 ((2<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
84 #define NMK_GPIO_ALT_C3 ((3<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
85 #define NMK_GPIO_ALT_C4 ((4<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
86
87 #define PRCM_GPIOCR_ALTCX(pin_num,\
88 altc1_used, altc1_ri, altc1_cb,\
89 altc2_used, altc2_ri, altc2_cb,\
90 altc3_used, altc3_ri, altc3_cb,\
91 altc4_used, altc4_ri, altc4_cb)\
92 {\
93 .pin = pin_num,\
94 .altcx[PRCM_IDX_GPIOCR_ALTC1] = {\
95 .used = altc1_used,\
96 .reg_index = altc1_ri,\
97 .control_bit = altc1_cb\
98 },\
99 .altcx[PRCM_IDX_GPIOCR_ALTC2] = {\
100 .used = altc2_used,\
101 .reg_index = altc2_ri,\
102 .control_bit = altc2_cb\
103 },\
104 .altcx[PRCM_IDX_GPIOCR_ALTC3] = {\
105 .used = altc3_used,\
106 .reg_index = altc3_ri,\
107 .control_bit = altc3_cb\
108 },\
109 .altcx[PRCM_IDX_GPIOCR_ALTC4] = {\
110 .used = altc4_used,\
111 .reg_index = altc4_ri,\
112 .control_bit = altc4_cb\
113 },\
114 }
115
116 /**
117 * enum prcm_gpiocr_reg_index
118 * Used to reference an PRCM GPIOCR register address.
119 */
120 enum prcm_gpiocr_reg_index {
121 PRCM_IDX_GPIOCR1,
122 PRCM_IDX_GPIOCR2,
123 PRCM_IDX_GPIOCR3
124 };
125 /**
126 * enum prcm_gpiocr_altcx_index
127 * Used to reference an Other alternate-C function.
128 */
129 enum prcm_gpiocr_altcx_index {
130 PRCM_IDX_GPIOCR_ALTC1,
131 PRCM_IDX_GPIOCR_ALTC2,
132 PRCM_IDX_GPIOCR_ALTC3,
133 PRCM_IDX_GPIOCR_ALTC4,
134 PRCM_IDX_GPIOCR_ALTC_MAX,
135 };
136
137 /**
138 * struct prcm_gpio_altcx - Other alternate-C function
139 * @used: other alternate-C function availability
140 * @reg_index: PRCM GPIOCR register index used to control the function
141 * @control_bit: PRCM GPIOCR bit used to control the function
142 */
143 struct prcm_gpiocr_altcx {
144 bool used:1;
145 u8 reg_index:2;
146 u8 control_bit:5;
147 } __packed;
148
149 /**
150 * struct prcm_gpio_altcx_pin_desc - Other alternate-C pin
151 * @pin: The pin number
152 * @altcx: array of other alternate-C[1-4] functions
153 */
154 struct prcm_gpiocr_altcx_pin_desc {
155 unsigned short pin;
156 struct prcm_gpiocr_altcx altcx[PRCM_IDX_GPIOCR_ALTC_MAX];
157 };
158
159 /**
160 * struct nmk_function - Nomadik pinctrl mux function
161 * @name: The name of the function, exported to pinctrl core.
162 * @groups: An array of pin groups that may select this function.
163 * @ngroups: The number of entries in @groups.
164 */
165 struct nmk_function {
166 const char *name;
167 const char * const *groups;
168 unsigned int ngroups;
169 };
170
171 /**
172 * struct nmk_pingroup - describes a Nomadik pin group
173 * @grp: Generic data of the pin group (name and pins)
174 * @altsetting: the altsetting to apply to all pins in this group to
175 * configure them to be used by a function
176 */
177 struct nmk_pingroup {
178 struct pingroup grp;
179 int altsetting;
180 };
181
182 #define NMK_PIN_GROUP(a, b) \
183 { \
184 .grp = PINCTRL_PINGROUP(#a, a##_pins, ARRAY_SIZE(a##_pins)), \
185 .altsetting = b, \
186 }
187
188 /**
189 * struct nmk_pinctrl_soc_data - Nomadik pin controller per-SoC configuration
190 * @pins: An array describing all pins the pin controller affects.
191 * All pins which are also GPIOs must be listed first within the
192 * array, and be numbered identically to the GPIO controller's
193 * numbering.
194 * @npins: The number of entries in @pins.
195 * @functions: The functions supported on this SoC.
196 * @nfunction: The number of entries in @functions.
197 * @groups: An array describing all pin groups the pin SoC supports.
198 * @ngroups: The number of entries in @groups.
199 * @altcx_pins: The pins that support Other alternate-C function on this SoC
200 * @npins_altcx: The number of Other alternate-C pins
201 * @prcm_gpiocr_registers: The array of PRCM GPIOCR registers on this SoC
202 */
203 struct nmk_pinctrl_soc_data {
204 const struct pinctrl_pin_desc *pins;
205 unsigned int npins;
206 const struct nmk_function *functions;
207 unsigned int nfunctions;
208 const struct nmk_pingroup *groups;
209 unsigned int ngroups;
210 const struct prcm_gpiocr_altcx_pin_desc *altcx_pins;
211 unsigned int npins_altcx;
212 const u16 *prcm_gpiocr_registers;
213 };
214
215 #ifdef CONFIG_PINCTRL_STN8815
216
217 void nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc);
218
219 #else
220
221 static inline void
222 nmk_pinctrl_stn8815_init(const struct nmk_pinctrl_soc_data **soc)
223 {
224 }
225
226 #endif
227
228 #ifdef CONFIG_PINCTRL_DB8500
229
230 void nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc);
231
232 #else
233
234 static inline void
235 nmk_pinctrl_db8500_init(const struct nmk_pinctrl_soc_data **soc)
236 {
237 }
238
239 #endif
240
241 #ifdef CONFIG_PINCTRL_DB8540
242
243 void nmk_pinctrl_db8540_init(const struct nmk_pinctrl_soc_data **soc);
244
245 #else
246
247 static inline void
248 nmk_pinctrl_db8540_init(const struct nmk_pinctrl_soc_data **soc)
249 {
250 }
251
252 #endif
253
254 struct platform_device;
255
256 #ifdef CONFIG_DEBUG_FS
257
258 /*
259 * Symbols declared in gpio-nomadik used by pinctrl-nomadik. If pinctrl-nomadik
260 * is enabled, then gpio-nomadik is enabled as well; the reverse if not always
261 * true.
262 */
263 void nmk_gpio_dbg_show_one(struct seq_file *s, struct pinctrl_dev *pctldev,
264 struct gpio_chip *chip, unsigned int offset,
265 unsigned int gpio);
266
267 #else
268
269 static inline void nmk_gpio_dbg_show_one(struct seq_file *s,
270 struct pinctrl_dev *pctldev,
271 struct gpio_chip *chip,
272 unsigned int offset,
273 unsigned int gpio)
274 {
275 }
276
277 #endif
278
279 void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip,
280 unsigned int offset, int val);
281 void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip, unsigned int offset,
282 enum nmk_gpio_slpm mode);
283 struct nmk_gpio_chip *nmk_gpio_populate_chip(struct fwnode_handle *fwnode,
284 struct platform_device *pdev);
285
286 /* Symbols declared in pinctrl-nomadik used by gpio-nomadik. */
287 #ifdef CONFIG_PINCTRL_NOMADIK
288 extern struct nmk_gpio_chip *nmk_gpio_chips[NMK_MAX_BANKS];
289 extern spinlock_t nmk_gpio_slpm_lock;
290 int __maybe_unused nmk_prcm_gpiocr_get_mode(struct pinctrl_dev *pctldev,
291 int gpio);
292 #endif
293
294 #endif /* __LINUX_GPIO_NOMADIK_H */
295
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