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a6df410d HY |
1 | /* |
2 | * mt65xx pinctrl driver based on Allwinner A1X pinctrl driver. | |
3 | * Copyright (c) 2014 MediaTek Inc. | |
4 | * Author: Hongzhou.Yang <hongzhou.yang@mediatek.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | */ | |
15 | ||
16 | #include <linux/io.h> | |
11aa679a | 17 | #include <linux/gpio/driver.h> |
a6df410d HY |
18 | #include <linux/of.h> |
19 | #include <linux/of_address.h> | |
20 | #include <linux/of_device.h> | |
21 | #include <linux/of_irq.h> | |
22 | #include <linux/pinctrl/consumer.h> | |
23 | #include <linux/pinctrl/machine.h> | |
24 | #include <linux/pinctrl/pinconf.h> | |
25 | #include <linux/pinctrl/pinconf-generic.h> | |
26 | #include <linux/pinctrl/pinctrl.h> | |
27 | #include <linux/pinctrl/pinmux.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/bitops.h> | |
31 | #include <linux/regmap.h> | |
32 | #include <linux/mfd/syscon.h> | |
d9819eb9 | 33 | #include <linux/delay.h> |
30f010f5 | 34 | #include <linux/interrupt.h> |
58a5e1b6 | 35 | #include <linux/pm.h> |
a6df410d HY |
36 | #include <dt-bindings/pinctrl/mt65xx.h> |
37 | ||
38 | #include "../core.h" | |
39 | #include "../pinconf.h" | |
40 | #include "../pinctrl-utils.h" | |
41 | #include "pinctrl-mtk-common.h" | |
42 | ||
43 | #define MAX_GPIO_MODE_PER_REG 5 | |
44 | #define GPIO_MODE_BITS 3 | |
59ee9c96 | 45 | #define GPIO_MODE_PREFIX "GPIO" |
a6df410d HY |
46 | |
47 | static const char * const mtk_gpio_functions[] = { | |
48 | "func0", "func1", "func2", "func3", | |
49 | "func4", "func5", "func6", "func7", | |
148b95ee BH |
50 | "func8", "func9", "func10", "func11", |
51 | "func12", "func13", "func14", "func15", | |
a6df410d HY |
52 | }; |
53 | ||
54 | /* | |
55 | * There are two base address for pull related configuration | |
56 | * in mt8135, and different GPIO pins use different base address. | |
57 | * When pin number greater than type1_start and less than type1_end, | |
58 | * should use the second base address. | |
59 | */ | |
60 | static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl, | |
61 | unsigned long pin) | |
62 | { | |
63 | if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end) | |
64 | return pctl->regmap2; | |
65 | return pctl->regmap1; | |
66 | } | |
67 | ||
68 | static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin) | |
69 | { | |
70 | /* Different SoC has different mask and port shift. */ | |
71 | return ((pin >> 4) & pctl->devdata->port_mask) | |
72 | << pctl->devdata->port_shf; | |
73 | } | |
74 | ||
75 | static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, | |
76 | struct pinctrl_gpio_range *range, unsigned offset, | |
77 | bool input) | |
78 | { | |
79 | unsigned int reg_addr; | |
80 | unsigned int bit; | |
81 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
82 | ||
83 | reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset; | |
84 | bit = BIT(offset & 0xf); | |
85 | ||
148b95ee BH |
86 | if (pctl->devdata->spec_dir_set) |
87 | pctl->devdata->spec_dir_set(®_addr, offset); | |
88 | ||
a6df410d HY |
89 | if (input) |
90 | /* Different SoC has different alignment offset. */ | |
91 | reg_addr = CLR_ADDR(reg_addr, pctl); | |
92 | else | |
93 | reg_addr = SET_ADDR(reg_addr, pctl); | |
94 | ||
95 | regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value) | |
100 | { | |
101 | unsigned int reg_addr; | |
102 | unsigned int bit; | |
11aa679a | 103 | struct mtk_pinctrl *pctl = gpiochip_get_data(chip); |
a6df410d HY |
104 | |
105 | reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset; | |
106 | bit = BIT(offset & 0xf); | |
107 | ||
108 | if (value) | |
109 | reg_addr = SET_ADDR(reg_addr, pctl); | |
110 | else | |
111 | reg_addr = CLR_ADDR(reg_addr, pctl); | |
112 | ||
113 | regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit); | |
114 | } | |
115 | ||
25d76b21 HY |
116 | static int mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin, |
117 | int value, enum pin_config_param arg) | |
a6df410d HY |
118 | { |
119 | unsigned int reg_addr, offset; | |
120 | unsigned int bit; | |
25d76b21 HY |
121 | |
122 | /** | |
123 | * Due to some soc are not support ies/smt config, add this special | |
124 | * control to handle it. | |
125 | */ | |
126 | if (!pctl->devdata->spec_ies_smt_set && | |
127 | pctl->devdata->ies_offset == MTK_PINCTRL_NOT_SUPPORT && | |
128 | arg == PIN_CONFIG_INPUT_ENABLE) | |
129 | return -EINVAL; | |
130 | ||
131 | if (!pctl->devdata->spec_ies_smt_set && | |
132 | pctl->devdata->smt_offset == MTK_PINCTRL_NOT_SUPPORT && | |
133 | arg == PIN_CONFIG_INPUT_SCHMITT_ENABLE) | |
134 | return -EINVAL; | |
30f010f5 HY |
135 | |
136 | /* | |
137 | * Due to some pins are irregular, their input enable and smt | |
25d76b21 | 138 | * control register are discontinuous, so we need this special handle. |
30f010f5 HY |
139 | */ |
140 | if (pctl->devdata->spec_ies_smt_set) { | |
25d76b21 HY |
141 | return pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin), |
142 | pin, pctl->devdata->port_align, value, arg); | |
30f010f5 | 143 | } |
a6df410d HY |
144 | |
145 | bit = BIT(pin & 0xf); | |
146 | ||
25d76b21 | 147 | if (arg == PIN_CONFIG_INPUT_ENABLE) |
a6df410d HY |
148 | offset = pctl->devdata->ies_offset; |
149 | else | |
150 | offset = pctl->devdata->smt_offset; | |
151 | ||
152 | if (value) | |
153 | reg_addr = SET_ADDR(mtk_get_port(pctl, pin) + offset, pctl); | |
154 | else | |
155 | reg_addr = CLR_ADDR(mtk_get_port(pctl, pin) + offset, pctl); | |
156 | ||
157 | regmap_write(mtk_get_regmap(pctl, pin), reg_addr, bit); | |
25d76b21 HY |
158 | return 0; |
159 | } | |
160 | ||
161 | int mtk_pconf_spec_set_ies_smt_range(struct regmap *regmap, | |
162 | const struct mtk_pin_ies_smt_set *ies_smt_infos, unsigned int info_num, | |
163 | unsigned int pin, unsigned char align, int value) | |
164 | { | |
165 | unsigned int i, reg_addr, bit; | |
166 | ||
167 | for (i = 0; i < info_num; i++) { | |
168 | if (pin >= ies_smt_infos[i].start && | |
169 | pin <= ies_smt_infos[i].end) { | |
170 | break; | |
171 | } | |
172 | } | |
173 | ||
174 | if (i == info_num) | |
175 | return -EINVAL; | |
176 | ||
177 | if (value) | |
178 | reg_addr = ies_smt_infos[i].offset + align; | |
179 | else | |
180 | reg_addr = ies_smt_infos[i].offset + (align << 1); | |
181 | ||
182 | bit = BIT(ies_smt_infos[i].bit); | |
183 | regmap_write(regmap, reg_addr, bit); | |
184 | return 0; | |
a6df410d HY |
185 | } |
186 | ||
187 | static const struct mtk_pin_drv_grp *mtk_find_pin_drv_grp_by_pin( | |
188 | struct mtk_pinctrl *pctl, unsigned long pin) { | |
189 | int i; | |
190 | ||
191 | for (i = 0; i < pctl->devdata->n_pin_drv_grps; i++) { | |
192 | const struct mtk_pin_drv_grp *pin_drv = | |
193 | pctl->devdata->pin_drv_grp + i; | |
194 | if (pin == pin_drv->pin) | |
195 | return pin_drv; | |
196 | } | |
197 | ||
198 | return NULL; | |
199 | } | |
200 | ||
201 | static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl, | |
202 | unsigned int pin, unsigned char driving) | |
203 | { | |
204 | const struct mtk_pin_drv_grp *pin_drv; | |
205 | unsigned int val; | |
206 | unsigned int bits, mask, shift; | |
207 | const struct mtk_drv_group_desc *drv_grp; | |
208 | ||
209 | if (pin >= pctl->devdata->npins) | |
210 | return -EINVAL; | |
211 | ||
212 | pin_drv = mtk_find_pin_drv_grp_by_pin(pctl, pin); | |
213 | if (!pin_drv || pin_drv->grp > pctl->devdata->n_grp_cls) | |
214 | return -EINVAL; | |
215 | ||
216 | drv_grp = pctl->devdata->grp_desc + pin_drv->grp; | |
217 | if (driving >= drv_grp->min_drv && driving <= drv_grp->max_drv | |
218 | && !(driving % drv_grp->step)) { | |
219 | val = driving / drv_grp->step - 1; | |
220 | bits = drv_grp->high_bit - drv_grp->low_bit + 1; | |
221 | mask = BIT(bits) - 1; | |
222 | shift = pin_drv->bit + drv_grp->low_bit; | |
223 | mask <<= shift; | |
224 | val <<= shift; | |
225 | return regmap_update_bits(mtk_get_regmap(pctl, pin), | |
226 | pin_drv->offset, mask, val); | |
227 | } | |
228 | ||
229 | return -EINVAL; | |
230 | } | |
231 | ||
e73fe271 YC |
232 | int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap, |
233 | const struct mtk_pin_spec_pupd_set_samereg *pupd_infos, | |
234 | unsigned int info_num, unsigned int pin, | |
235 | unsigned char align, bool isup, unsigned int r1r0) | |
236 | { | |
237 | unsigned int i; | |
238 | unsigned int reg_pupd, reg_set, reg_rst; | |
239 | unsigned int bit_pupd, bit_r0, bit_r1; | |
240 | const struct mtk_pin_spec_pupd_set_samereg *spec_pupd_pin; | |
241 | bool find = false; | |
242 | ||
243 | for (i = 0; i < info_num; i++) { | |
244 | if (pin == pupd_infos[i].pin) { | |
245 | find = true; | |
246 | break; | |
247 | } | |
248 | } | |
249 | ||
250 | if (!find) | |
251 | return -EINVAL; | |
252 | ||
253 | spec_pupd_pin = pupd_infos + i; | |
254 | reg_set = spec_pupd_pin->offset + align; | |
255 | reg_rst = spec_pupd_pin->offset + (align << 1); | |
256 | ||
257 | if (isup) | |
258 | reg_pupd = reg_rst; | |
259 | else | |
260 | reg_pupd = reg_set; | |
261 | ||
262 | bit_pupd = BIT(spec_pupd_pin->pupd_bit); | |
263 | regmap_write(regmap, reg_pupd, bit_pupd); | |
264 | ||
265 | bit_r0 = BIT(spec_pupd_pin->r0_bit); | |
266 | bit_r1 = BIT(spec_pupd_pin->r1_bit); | |
267 | ||
268 | switch (r1r0) { | |
269 | case MTK_PUPD_SET_R1R0_00: | |
270 | regmap_write(regmap, reg_rst, bit_r0); | |
271 | regmap_write(regmap, reg_rst, bit_r1); | |
272 | break; | |
273 | case MTK_PUPD_SET_R1R0_01: | |
274 | regmap_write(regmap, reg_set, bit_r0); | |
275 | regmap_write(regmap, reg_rst, bit_r1); | |
276 | break; | |
277 | case MTK_PUPD_SET_R1R0_10: | |
278 | regmap_write(regmap, reg_rst, bit_r0); | |
279 | regmap_write(regmap, reg_set, bit_r1); | |
280 | break; | |
281 | case MTK_PUPD_SET_R1R0_11: | |
282 | regmap_write(regmap, reg_set, bit_r0); | |
283 | regmap_write(regmap, reg_set, bit_r1); | |
284 | break; | |
285 | default: | |
286 | return -EINVAL; | |
287 | } | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
a6df410d HY |
292 | static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl, |
293 | unsigned int pin, bool enable, bool isup, unsigned int arg) | |
294 | { | |
295 | unsigned int bit; | |
296 | unsigned int reg_pullen, reg_pullsel; | |
297 | int ret; | |
298 | ||
299 | /* Some pins' pull setting are very different, | |
300 | * they have separate pull up/down bit, R0 and R1 | |
301 | * resistor bit, so we need this special handle. | |
302 | */ | |
303 | if (pctl->devdata->spec_pull_set) { | |
304 | ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin), | |
305 | pin, pctl->devdata->port_align, isup, arg); | |
306 | if (!ret) | |
307 | return 0; | |
308 | } | |
309 | ||
310 | /* For generic pull config, default arg value should be 0 or 1. */ | |
311 | if (arg != 0 && arg != 1) { | |
312 | dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n", | |
313 | arg, pin); | |
314 | return -EINVAL; | |
315 | } | |
316 | ||
317 | bit = BIT(pin & 0xf); | |
318 | if (enable) | |
319 | reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) + | |
320 | pctl->devdata->pullen_offset, pctl); | |
321 | else | |
322 | reg_pullen = CLR_ADDR(mtk_get_port(pctl, pin) + | |
323 | pctl->devdata->pullen_offset, pctl); | |
324 | ||
325 | if (isup) | |
326 | reg_pullsel = SET_ADDR(mtk_get_port(pctl, pin) + | |
327 | pctl->devdata->pullsel_offset, pctl); | |
328 | else | |
329 | reg_pullsel = CLR_ADDR(mtk_get_port(pctl, pin) + | |
330 | pctl->devdata->pullsel_offset, pctl); | |
331 | ||
332 | regmap_write(mtk_get_regmap(pctl, pin), reg_pullen, bit); | |
333 | regmap_write(mtk_get_regmap(pctl, pin), reg_pullsel, bit); | |
334 | return 0; | |
335 | } | |
336 | ||
337 | static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev, | |
338 | unsigned int pin, enum pin_config_param param, | |
339 | enum pin_config_param arg) | |
340 | { | |
25d76b21 | 341 | int ret = 0; |
a6df410d HY |
342 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
343 | ||
344 | switch (param) { | |
345 | case PIN_CONFIG_BIAS_DISABLE: | |
25d76b21 | 346 | ret = mtk_pconf_set_pull_select(pctl, pin, false, false, arg); |
a6df410d HY |
347 | break; |
348 | case PIN_CONFIG_BIAS_PULL_UP: | |
25d76b21 | 349 | ret = mtk_pconf_set_pull_select(pctl, pin, true, true, arg); |
a6df410d HY |
350 | break; |
351 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
25d76b21 | 352 | ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg); |
a6df410d HY |
353 | break; |
354 | case PIN_CONFIG_INPUT_ENABLE: | |
eceb3e61 | 355 | mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true); |
25d76b21 | 356 | ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param); |
a6df410d HY |
357 | break; |
358 | case PIN_CONFIG_OUTPUT: | |
359 | mtk_gpio_set(pctl->chip, pin, arg); | |
25d76b21 | 360 | ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false); |
a6df410d HY |
361 | break; |
362 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: | |
eceb3e61 | 363 | mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true); |
25d76b21 | 364 | ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param); |
a6df410d HY |
365 | break; |
366 | case PIN_CONFIG_DRIVE_STRENGTH: | |
25d76b21 | 367 | ret = mtk_pconf_set_driving(pctl, pin, arg); |
a6df410d HY |
368 | break; |
369 | default: | |
25d76b21 | 370 | ret = -EINVAL; |
a6df410d HY |
371 | } |
372 | ||
25d76b21 | 373 | return ret; |
a6df410d HY |
374 | } |
375 | ||
376 | static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, | |
377 | unsigned group, | |
378 | unsigned long *config) | |
379 | { | |
380 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
381 | ||
382 | *config = pctl->groups[group].config; | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group, | |
388 | unsigned long *configs, unsigned num_configs) | |
389 | { | |
390 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
391 | struct mtk_pinctrl_group *g = &pctl->groups[group]; | |
25d76b21 | 392 | int i, ret; |
a6df410d HY |
393 | |
394 | for (i = 0; i < num_configs; i++) { | |
25d76b21 | 395 | ret = mtk_pconf_parse_conf(pctldev, g->pin, |
a6df410d HY |
396 | pinconf_to_config_param(configs[i]), |
397 | pinconf_to_config_argument(configs[i])); | |
25d76b21 HY |
398 | if (ret < 0) |
399 | return ret; | |
a6df410d HY |
400 | |
401 | g->config = configs[i]; | |
402 | } | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | static const struct pinconf_ops mtk_pconf_ops = { | |
408 | .pin_config_group_get = mtk_pconf_group_get, | |
409 | .pin_config_group_set = mtk_pconf_group_set, | |
410 | }; | |
411 | ||
412 | static struct mtk_pinctrl_group * | |
413 | mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *pctl, u32 pin) | |
414 | { | |
415 | int i; | |
416 | ||
417 | for (i = 0; i < pctl->ngroups; i++) { | |
418 | struct mtk_pinctrl_group *grp = pctl->groups + i; | |
419 | ||
420 | if (grp->pin == pin) | |
421 | return grp; | |
422 | } | |
423 | ||
424 | return NULL; | |
425 | } | |
426 | ||
427 | static const struct mtk_desc_function *mtk_pctrl_find_function_by_pin( | |
428 | struct mtk_pinctrl *pctl, u32 pin_num, u32 fnum) | |
429 | { | |
430 | const struct mtk_desc_pin *pin = pctl->devdata->pins + pin_num; | |
431 | const struct mtk_desc_function *func = pin->functions; | |
432 | ||
433 | while (func && func->name) { | |
434 | if (func->muxval == fnum) | |
435 | return func; | |
436 | func++; | |
437 | } | |
438 | ||
439 | return NULL; | |
440 | } | |
441 | ||
442 | static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *pctl, | |
443 | u32 pin_num, u32 fnum) | |
444 | { | |
445 | int i; | |
446 | ||
447 | for (i = 0; i < pctl->devdata->npins; i++) { | |
448 | const struct mtk_desc_pin *pin = pctl->devdata->pins + i; | |
449 | ||
450 | if (pin->pin.number == pin_num) { | |
451 | const struct mtk_desc_function *func = | |
452 | pin->functions; | |
453 | ||
454 | while (func && func->name) { | |
455 | if (func->muxval == fnum) | |
456 | return true; | |
457 | func++; | |
458 | } | |
459 | ||
460 | break; | |
461 | } | |
462 | } | |
463 | ||
464 | return false; | |
465 | } | |
466 | ||
467 | static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl, | |
468 | u32 pin, u32 fnum, struct mtk_pinctrl_group *grp, | |
469 | struct pinctrl_map **map, unsigned *reserved_maps, | |
470 | unsigned *num_maps) | |
471 | { | |
472 | bool ret; | |
473 | ||
474 | if (*num_maps == *reserved_maps) | |
475 | return -ENOSPC; | |
476 | ||
477 | (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; | |
478 | (*map)[*num_maps].data.mux.group = grp->name; | |
479 | ||
480 | ret = mtk_pctrl_is_function_valid(pctl, pin, fnum); | |
481 | if (!ret) { | |
482 | dev_err(pctl->dev, "invalid function %d on pin %d .\n", | |
483 | fnum, pin); | |
484 | return -EINVAL; | |
485 | } | |
486 | ||
487 | (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum]; | |
488 | (*num_maps)++; | |
489 | ||
490 | return 0; | |
491 | } | |
492 | ||
493 | static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, | |
494 | struct device_node *node, | |
495 | struct pinctrl_map **map, | |
496 | unsigned *reserved_maps, | |
497 | unsigned *num_maps) | |
498 | { | |
499 | struct property *pins; | |
500 | u32 pinfunc, pin, func; | |
501 | int num_pins, num_funcs, maps_per_pin; | |
502 | unsigned long *configs; | |
503 | unsigned int num_configs; | |
504 | bool has_config = 0; | |
505 | int i, err; | |
506 | unsigned reserve = 0; | |
507 | struct mtk_pinctrl_group *grp; | |
508 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
509 | ||
510 | pins = of_find_property(node, "pinmux", NULL); | |
511 | if (!pins) { | |
512 | dev_err(pctl->dev, "missing pins property in node %s .\n", | |
513 | node->name); | |
514 | return -EINVAL; | |
515 | } | |
516 | ||
c445cac3 HY |
517 | err = pinconf_generic_parse_dt_config(node, pctldev, &configs, |
518 | &num_configs); | |
b04a23b0 HY |
519 | if (err) |
520 | return err; | |
521 | ||
a6df410d HY |
522 | if (num_configs) |
523 | has_config = 1; | |
524 | ||
525 | num_pins = pins->length / sizeof(u32); | |
526 | num_funcs = num_pins; | |
527 | maps_per_pin = 0; | |
528 | if (num_funcs) | |
529 | maps_per_pin++; | |
530 | if (has_config && num_pins >= 1) | |
531 | maps_per_pin++; | |
532 | ||
b04a23b0 HY |
533 | if (!num_pins || !maps_per_pin) { |
534 | err = -EINVAL; | |
535 | goto exit; | |
536 | } | |
a6df410d HY |
537 | |
538 | reserve = num_pins * maps_per_pin; | |
539 | ||
540 | err = pinctrl_utils_reserve_map(pctldev, map, | |
541 | reserved_maps, num_maps, reserve); | |
542 | if (err < 0) | |
b04a23b0 | 543 | goto exit; |
a6df410d HY |
544 | |
545 | for (i = 0; i < num_pins; i++) { | |
546 | err = of_property_read_u32_index(node, "pinmux", | |
547 | i, &pinfunc); | |
548 | if (err) | |
b04a23b0 | 549 | goto exit; |
a6df410d HY |
550 | |
551 | pin = MTK_GET_PIN_NO(pinfunc); | |
552 | func = MTK_GET_PIN_FUNC(pinfunc); | |
553 | ||
554 | if (pin >= pctl->devdata->npins || | |
555 | func >= ARRAY_SIZE(mtk_gpio_functions)) { | |
556 | dev_err(pctl->dev, "invalid pins value.\n"); | |
557 | err = -EINVAL; | |
b04a23b0 | 558 | goto exit; |
a6df410d HY |
559 | } |
560 | ||
561 | grp = mtk_pctrl_find_group_by_pin(pctl, pin); | |
562 | if (!grp) { | |
563 | dev_err(pctl->dev, "unable to match pin %d to group\n", | |
564 | pin); | |
b04a23b0 HY |
565 | err = -EINVAL; |
566 | goto exit; | |
a6df410d HY |
567 | } |
568 | ||
569 | err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map, | |
570 | reserved_maps, num_maps); | |
571 | if (err < 0) | |
b04a23b0 | 572 | goto exit; |
a6df410d HY |
573 | |
574 | if (has_config) { | |
575 | err = pinctrl_utils_add_map_configs(pctldev, map, | |
576 | reserved_maps, num_maps, grp->name, | |
577 | configs, num_configs, | |
578 | PIN_MAP_TYPE_CONFIGS_GROUP); | |
579 | if (err < 0) | |
b04a23b0 | 580 | goto exit; |
a6df410d HY |
581 | } |
582 | } | |
583 | ||
b04a23b0 | 584 | err = 0; |
a6df410d | 585 | |
b04a23b0 HY |
586 | exit: |
587 | kfree(configs); | |
a6df410d HY |
588 | return err; |
589 | } | |
590 | ||
591 | static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, | |
592 | struct device_node *np_config, | |
593 | struct pinctrl_map **map, unsigned *num_maps) | |
594 | { | |
595 | struct device_node *np; | |
596 | unsigned reserved_maps; | |
597 | int ret; | |
598 | ||
599 | *map = NULL; | |
600 | *num_maps = 0; | |
601 | reserved_maps = 0; | |
602 | ||
603 | for_each_child_of_node(np_config, np) { | |
604 | ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map, | |
605 | &reserved_maps, num_maps); | |
606 | if (ret < 0) { | |
d32f7fd3 | 607 | pinctrl_utils_free_map(pctldev, *map, *num_maps); |
4fc8a4b2 | 608 | of_node_put(np); |
a6df410d HY |
609 | return ret; |
610 | } | |
611 | } | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev) | |
617 | { | |
618 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
619 | ||
620 | return pctl->ngroups; | |
621 | } | |
622 | ||
623 | static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev, | |
624 | unsigned group) | |
625 | { | |
626 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
627 | ||
628 | return pctl->groups[group].name; | |
629 | } | |
630 | ||
631 | static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev, | |
632 | unsigned group, | |
633 | const unsigned **pins, | |
634 | unsigned *num_pins) | |
635 | { | |
636 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
637 | ||
638 | *pins = (unsigned *)&pctl->groups[group].pin; | |
639 | *num_pins = 1; | |
640 | ||
641 | return 0; | |
642 | } | |
643 | ||
644 | static const struct pinctrl_ops mtk_pctrl_ops = { | |
645 | .dt_node_to_map = mtk_pctrl_dt_node_to_map, | |
d32f7fd3 | 646 | .dt_free_map = pinctrl_utils_free_map, |
a6df410d HY |
647 | .get_groups_count = mtk_pctrl_get_groups_count, |
648 | .get_group_name = mtk_pctrl_get_group_name, | |
649 | .get_group_pins = mtk_pctrl_get_group_pins, | |
650 | }; | |
651 | ||
652 | static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) | |
653 | { | |
654 | return ARRAY_SIZE(mtk_gpio_functions); | |
655 | } | |
656 | ||
657 | static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev, | |
658 | unsigned selector) | |
659 | { | |
660 | return mtk_gpio_functions[selector]; | |
661 | } | |
662 | ||
663 | static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev, | |
664 | unsigned function, | |
665 | const char * const **groups, | |
666 | unsigned * const num_groups) | |
667 | { | |
668 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
669 | ||
670 | *groups = pctl->grp_names; | |
671 | *num_groups = pctl->ngroups; | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | static int mtk_pmx_set_mode(struct pinctrl_dev *pctldev, | |
677 | unsigned long pin, unsigned long mode) | |
678 | { | |
679 | unsigned int reg_addr; | |
680 | unsigned char bit; | |
681 | unsigned int val; | |
682 | unsigned int mask = (1L << GPIO_MODE_BITS) - 1; | |
683 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
684 | ||
148b95ee BH |
685 | if (pctl->devdata->spec_pinmux_set) |
686 | pctl->devdata->spec_pinmux_set(mtk_get_regmap(pctl, pin), | |
687 | pin, mode); | |
688 | ||
a6df410d HY |
689 | reg_addr = ((pin / MAX_GPIO_MODE_PER_REG) << pctl->devdata->port_shf) |
690 | + pctl->devdata->pinmux_offset; | |
691 | ||
148b95ee | 692 | mode &= mask; |
a6df410d HY |
693 | bit = pin % MAX_GPIO_MODE_PER_REG; |
694 | mask <<= (GPIO_MODE_BITS * bit); | |
695 | val = (mode << (GPIO_MODE_BITS * bit)); | |
696 | return regmap_update_bits(mtk_get_regmap(pctl, pin), | |
697 | reg_addr, mask, val); | |
698 | } | |
699 | ||
d9819eb9 MM |
700 | static const struct mtk_desc_pin * |
701 | mtk_find_pin_by_eint_num(struct mtk_pinctrl *pctl, unsigned int eint_num) | |
702 | { | |
703 | int i; | |
704 | const struct mtk_desc_pin *pin; | |
705 | ||
706 | for (i = 0; i < pctl->devdata->npins; i++) { | |
707 | pin = pctl->devdata->pins + i; | |
708 | if (pin->eint.eintnum == eint_num) | |
709 | return pin; | |
710 | } | |
711 | ||
712 | return NULL; | |
713 | } | |
714 | ||
a6df410d HY |
715 | static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev, |
716 | unsigned function, | |
717 | unsigned group) | |
718 | { | |
719 | bool ret; | |
720 | const struct mtk_desc_function *desc; | |
721 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
722 | struct mtk_pinctrl_group *g = pctl->groups + group; | |
723 | ||
724 | ret = mtk_pctrl_is_function_valid(pctl, g->pin, function); | |
725 | if (!ret) { | |
c70336cc | 726 | dev_err(pctl->dev, "invalid function %d on group %d .\n", |
a6df410d HY |
727 | function, group); |
728 | return -EINVAL; | |
729 | } | |
730 | ||
731 | desc = mtk_pctrl_find_function_by_pin(pctl, g->pin, function); | |
732 | if (!desc) | |
733 | return -EINVAL; | |
734 | mtk_pmx_set_mode(pctldev, g->pin, desc->muxval); | |
735 | return 0; | |
736 | } | |
737 | ||
59ee9c96 BH |
738 | static int mtk_pmx_find_gpio_mode(struct mtk_pinctrl *pctl, |
739 | unsigned offset) | |
740 | { | |
741 | const struct mtk_desc_pin *pin = pctl->devdata->pins + offset; | |
742 | const struct mtk_desc_function *func = pin->functions; | |
743 | ||
744 | while (func && func->name) { | |
745 | if (!strncmp(func->name, GPIO_MODE_PREFIX, | |
746 | sizeof(GPIO_MODE_PREFIX)-1)) | |
747 | return func->muxval; | |
748 | func++; | |
749 | } | |
750 | return -EINVAL; | |
751 | } | |
752 | ||
753 | static int mtk_pmx_gpio_request_enable(struct pinctrl_dev *pctldev, | |
754 | struct pinctrl_gpio_range *range, | |
755 | unsigned offset) | |
756 | { | |
740f5b08 | 757 | int muxval; |
59ee9c96 BH |
758 | struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
759 | ||
760 | muxval = mtk_pmx_find_gpio_mode(pctl, offset); | |
761 | ||
762 | if (muxval < 0) { | |
763 | dev_err(pctl->dev, "invalid gpio pin %d.\n", offset); | |
764 | return -EINVAL; | |
765 | } | |
766 | ||
767 | mtk_pmx_set_mode(pctldev, offset, muxval); | |
31763d3b | 768 | mtk_pconf_set_ies_smt(pctl, offset, 1, PIN_CONFIG_INPUT_ENABLE); |
59ee9c96 BH |
769 | |
770 | return 0; | |
771 | } | |
772 | ||
a6df410d HY |
773 | static const struct pinmux_ops mtk_pmx_ops = { |
774 | .get_functions_count = mtk_pmx_get_funcs_cnt, | |
775 | .get_function_name = mtk_pmx_get_func_name, | |
776 | .get_function_groups = mtk_pmx_get_func_groups, | |
777 | .set_mux = mtk_pmx_set_mux, | |
778 | .gpio_set_direction = mtk_pmx_gpio_set_direction, | |
59ee9c96 | 779 | .gpio_request_enable = mtk_pmx_gpio_request_enable, |
a6df410d HY |
780 | }; |
781 | ||
a6df410d HY |
782 | static int mtk_gpio_direction_input(struct gpio_chip *chip, |
783 | unsigned offset) | |
784 | { | |
785 | return pinctrl_gpio_direction_input(chip->base + offset); | |
786 | } | |
787 | ||
788 | static int mtk_gpio_direction_output(struct gpio_chip *chip, | |
789 | unsigned offset, int value) | |
790 | { | |
791 | mtk_gpio_set(chip, offset, value); | |
792 | return pinctrl_gpio_direction_output(chip->base + offset); | |
793 | } | |
794 | ||
795 | static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset) | |
796 | { | |
797 | unsigned int reg_addr; | |
798 | unsigned int bit; | |
799 | unsigned int read_val = 0; | |
800 | ||
11aa679a | 801 | struct mtk_pinctrl *pctl = gpiochip_get_data(chip); |
a6df410d HY |
802 | |
803 | reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset; | |
804 | bit = BIT(offset & 0xf); | |
148b95ee BH |
805 | |
806 | if (pctl->devdata->spec_dir_set) | |
807 | pctl->devdata->spec_dir_set(®_addr, offset); | |
808 | ||
a6df410d | 809 | regmap_read(pctl->regmap1, reg_addr, &read_val); |
f97c2309 | 810 | return !(read_val & bit); |
a6df410d HY |
811 | } |
812 | ||
813 | static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset) | |
814 | { | |
815 | unsigned int reg_addr; | |
816 | unsigned int bit; | |
817 | unsigned int read_val = 0; | |
11aa679a | 818 | struct mtk_pinctrl *pctl = gpiochip_get_data(chip); |
a6df410d | 819 | |
f97c2309 HY |
820 | reg_addr = mtk_get_port(pctl, offset) + |
821 | pctl->devdata->din_offset; | |
a6df410d HY |
822 | |
823 | bit = BIT(offset & 0xf); | |
824 | regmap_read(pctl->regmap1, reg_addr, &read_val); | |
825 | return !!(read_val & bit); | |
826 | } | |
827 | ||
d9819eb9 MM |
828 | static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
829 | { | |
830 | const struct mtk_desc_pin *pin; | |
11aa679a | 831 | struct mtk_pinctrl *pctl = gpiochip_get_data(chip); |
d9819eb9 MM |
832 | int irq; |
833 | ||
834 | pin = pctl->devdata->pins + offset; | |
835 | if (pin->eint.eintnum == NO_EINT_SUPPORT) | |
836 | return -EINVAL; | |
837 | ||
838 | irq = irq_find_mapping(pctl->domain, pin->eint.eintnum); | |
839 | if (!irq) | |
840 | return -EINVAL; | |
841 | ||
842 | return irq; | |
843 | } | |
844 | ||
845 | static int mtk_pinctrl_irq_request_resources(struct irq_data *d) | |
846 | { | |
847 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
848 | const struct mtk_desc_pin *pin; | |
849 | int ret; | |
850 | ||
851 | pin = mtk_find_pin_by_eint_num(pctl, d->hwirq); | |
852 | ||
853 | if (!pin) { | |
854 | dev_err(pctl->dev, "Can not find pin\n"); | |
855 | return -EINVAL; | |
856 | } | |
857 | ||
858 | ret = gpiochip_lock_as_irq(pctl->chip, pin->pin.number); | |
859 | if (ret) { | |
860 | dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n", | |
861 | irqd_to_hwirq(d)); | |
862 | return ret; | |
863 | } | |
864 | ||
865 | /* set mux to INT mode */ | |
866 | mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux); | |
b1c5b770 BH |
867 | /* set gpio direction to input */ |
868 | mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number, true); | |
869 | /* set input-enable */ | |
870 | mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1, PIN_CONFIG_INPUT_ENABLE); | |
d9819eb9 MM |
871 | |
872 | return 0; | |
873 | } | |
874 | ||
875 | static void mtk_pinctrl_irq_release_resources(struct irq_data *d) | |
876 | { | |
877 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
878 | const struct mtk_desc_pin *pin; | |
879 | ||
880 | pin = mtk_find_pin_by_eint_num(pctl, d->hwirq); | |
881 | ||
882 | if (!pin) { | |
883 | dev_err(pctl->dev, "Can not find pin\n"); | |
884 | return; | |
885 | } | |
886 | ||
887 | gpiochip_unlock_as_irq(pctl->chip, pin->pin.number); | |
888 | } | |
889 | ||
890 | static void __iomem *mtk_eint_get_offset(struct mtk_pinctrl *pctl, | |
891 | unsigned int eint_num, unsigned int offset) | |
892 | { | |
893 | unsigned int eint_base = 0; | |
894 | void __iomem *reg; | |
895 | ||
896 | if (eint_num >= pctl->devdata->ap_num) | |
897 | eint_base = pctl->devdata->ap_num; | |
898 | ||
899 | reg = pctl->eint_reg_base + offset + ((eint_num - eint_base) / 32) * 4; | |
900 | ||
901 | return reg; | |
902 | } | |
903 | ||
904 | /* | |
905 | * mtk_can_en_debounce: Check the EINT number is able to enable debounce or not | |
906 | * @eint_num: the EINT number to setmtk_pinctrl | |
907 | */ | |
908 | static unsigned int mtk_eint_can_en_debounce(struct mtk_pinctrl *pctl, | |
909 | unsigned int eint_num) | |
910 | { | |
911 | unsigned int sens; | |
912 | unsigned int bit = BIT(eint_num % 32); | |
913 | const struct mtk_eint_offsets *eint_offsets = | |
914 | &pctl->devdata->eint_offsets; | |
915 | ||
916 | void __iomem *reg = mtk_eint_get_offset(pctl, eint_num, | |
917 | eint_offsets->sens); | |
918 | ||
919 | if (readl(reg) & bit) | |
920 | sens = MT_LEVEL_SENSITIVE; | |
921 | else | |
922 | sens = MT_EDGE_SENSITIVE; | |
923 | ||
924 | if ((eint_num < pctl->devdata->db_cnt) && (sens != MT_EDGE_SENSITIVE)) | |
925 | return 1; | |
926 | else | |
927 | return 0; | |
928 | } | |
929 | ||
930 | /* | |
931 | * mtk_eint_get_mask: To get the eint mask | |
932 | * @eint_num: the EINT number to get | |
933 | */ | |
934 | static unsigned int mtk_eint_get_mask(struct mtk_pinctrl *pctl, | |
935 | unsigned int eint_num) | |
936 | { | |
937 | unsigned int bit = BIT(eint_num % 32); | |
938 | const struct mtk_eint_offsets *eint_offsets = | |
939 | &pctl->devdata->eint_offsets; | |
940 | ||
941 | void __iomem *reg = mtk_eint_get_offset(pctl, eint_num, | |
942 | eint_offsets->mask); | |
943 | ||
944 | return !!(readl(reg) & bit); | |
945 | } | |
946 | ||
3221f40b YC |
947 | static int mtk_eint_flip_edge(struct mtk_pinctrl *pctl, int hwirq) |
948 | { | |
949 | int start_level, curr_level; | |
950 | unsigned int reg_offset; | |
951 | const struct mtk_eint_offsets *eint_offsets = &(pctl->devdata->eint_offsets); | |
b4b05b9a | 952 | u32 mask = BIT(hwirq & 0x1f); |
3221f40b YC |
953 | u32 port = (hwirq >> 5) & eint_offsets->port_mask; |
954 | void __iomem *reg = pctl->eint_reg_base + (port << 2); | |
955 | const struct mtk_desc_pin *pin; | |
956 | ||
957 | pin = mtk_find_pin_by_eint_num(pctl, hwirq); | |
958 | curr_level = mtk_gpio_get(pctl->chip, pin->pin.number); | |
959 | do { | |
960 | start_level = curr_level; | |
961 | if (start_level) | |
962 | reg_offset = eint_offsets->pol_clr; | |
963 | else | |
964 | reg_offset = eint_offsets->pol_set; | |
965 | writel(mask, reg + reg_offset); | |
966 | ||
967 | curr_level = mtk_gpio_get(pctl->chip, pin->pin.number); | |
968 | } while (start_level != curr_level); | |
969 | ||
970 | return start_level; | |
971 | } | |
972 | ||
d9819eb9 MM |
973 | static void mtk_eint_mask(struct irq_data *d) |
974 | { | |
975 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
976 | const struct mtk_eint_offsets *eint_offsets = | |
977 | &pctl->devdata->eint_offsets; | |
978 | u32 mask = BIT(d->hwirq & 0x1f); | |
979 | void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, | |
980 | eint_offsets->mask_set); | |
981 | ||
982 | writel(mask, reg); | |
983 | } | |
984 | ||
985 | static void mtk_eint_unmask(struct irq_data *d) | |
986 | { | |
987 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
988 | const struct mtk_eint_offsets *eint_offsets = | |
989 | &pctl->devdata->eint_offsets; | |
990 | u32 mask = BIT(d->hwirq & 0x1f); | |
991 | void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, | |
992 | eint_offsets->mask_clr); | |
993 | ||
994 | writel(mask, reg); | |
3221f40b YC |
995 | |
996 | if (pctl->eint_dual_edges[d->hwirq]) | |
997 | mtk_eint_flip_edge(pctl, d->hwirq); | |
d9819eb9 MM |
998 | } |
999 | ||
1000 | static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset, | |
1001 | unsigned debounce) | |
1002 | { | |
58383c78 | 1003 | struct mtk_pinctrl *pctl = dev_get_drvdata(chip->parent); |
d9819eb9 MM |
1004 | int eint_num, virq, eint_offset; |
1005 | unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask, dbnc; | |
5fedbb92 YC |
1006 | static const unsigned int debounce_time[] = {500, 1000, 16000, 32000, 64000, |
1007 | 128000, 256000}; | |
d9819eb9 MM |
1008 | const struct mtk_desc_pin *pin; |
1009 | struct irq_data *d; | |
1010 | ||
1011 | pin = pctl->devdata->pins + offset; | |
1012 | if (pin->eint.eintnum == NO_EINT_SUPPORT) | |
1013 | return -EINVAL; | |
1014 | ||
1015 | eint_num = pin->eint.eintnum; | |
1016 | virq = irq_find_mapping(pctl->domain, eint_num); | |
1017 | eint_offset = (eint_num % 4) * 8; | |
1018 | d = irq_get_irq_data(virq); | |
1019 | ||
1020 | set_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_set; | |
1021 | clr_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_clr; | |
1022 | if (!mtk_eint_can_en_debounce(pctl, eint_num)) | |
1023 | return -ENOSYS; | |
1024 | ||
5fedbb92 YC |
1025 | dbnc = ARRAY_SIZE(debounce_time); |
1026 | for (i = 0; i < ARRAY_SIZE(debounce_time); i++) { | |
1027 | if (debounce <= debounce_time[i]) { | |
d9819eb9 MM |
1028 | dbnc = i; |
1029 | break; | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | if (!mtk_eint_get_mask(pctl, eint_num)) { | |
1034 | mtk_eint_mask(d); | |
1035 | unmask = 1; | |
74d77e50 CIK |
1036 | } else { |
1037 | unmask = 0; | |
d9819eb9 MM |
1038 | } |
1039 | ||
1040 | clr_bit = 0xff << eint_offset; | |
1041 | writel(clr_bit, pctl->eint_reg_base + clr_offset); | |
1042 | ||
1043 | bit = ((dbnc << EINT_DBNC_SET_DBNC_BITS) | EINT_DBNC_SET_EN) << | |
1044 | eint_offset; | |
1045 | rst = EINT_DBNC_RST_BIT << eint_offset; | |
1046 | writel(rst | bit, pctl->eint_reg_base + set_offset); | |
1047 | ||
1048 | /* Delay a while (more than 2T) to wait for hw debounce counter reset | |
1049 | work correctly */ | |
1050 | udelay(1); | |
1051 | if (unmask == 1) | |
1052 | mtk_eint_unmask(d); | |
1053 | ||
1054 | return 0; | |
1055 | } | |
1056 | ||
03e9888f | 1057 | static const struct gpio_chip mtk_gpio_chip = { |
a6df410d | 1058 | .owner = THIS_MODULE, |
98c85d58 JG |
1059 | .request = gpiochip_generic_request, |
1060 | .free = gpiochip_generic_free, | |
f97c2309 | 1061 | .get_direction = mtk_gpio_get_direction, |
a6df410d HY |
1062 | .direction_input = mtk_gpio_direction_input, |
1063 | .direction_output = mtk_gpio_direction_output, | |
1064 | .get = mtk_gpio_get, | |
1065 | .set = mtk_gpio_set, | |
d9819eb9 MM |
1066 | .to_irq = mtk_gpio_to_irq, |
1067 | .set_debounce = mtk_gpio_set_debounce, | |
a6df410d HY |
1068 | .of_gpio_n_cells = 2, |
1069 | }; | |
1070 | ||
d9819eb9 MM |
1071 | static int mtk_eint_set_type(struct irq_data *d, |
1072 | unsigned int type) | |
1073 | { | |
1074 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
1075 | const struct mtk_eint_offsets *eint_offsets = | |
1076 | &pctl->devdata->eint_offsets; | |
1077 | u32 mask = BIT(d->hwirq & 0x1f); | |
1078 | void __iomem *reg; | |
1079 | ||
1080 | if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) || | |
d9819eb9 MM |
1081 | ((type & IRQ_TYPE_LEVEL_MASK) == IRQ_TYPE_LEVEL_MASK)) { |
1082 | dev_err(pctl->dev, "Can't configure IRQ%d (EINT%lu) for type 0x%X\n", | |
1083 | d->irq, d->hwirq, type); | |
1084 | return -EINVAL; | |
1085 | } | |
1086 | ||
3221f40b YC |
1087 | if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) |
1088 | pctl->eint_dual_edges[d->hwirq] = 1; | |
1089 | else | |
1090 | pctl->eint_dual_edges[d->hwirq] = 0; | |
1091 | ||
d9819eb9 MM |
1092 | if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) { |
1093 | reg = mtk_eint_get_offset(pctl, d->hwirq, | |
1094 | eint_offsets->pol_clr); | |
1095 | writel(mask, reg); | |
1096 | } else { | |
1097 | reg = mtk_eint_get_offset(pctl, d->hwirq, | |
1098 | eint_offsets->pol_set); | |
1099 | writel(mask, reg); | |
1100 | } | |
1101 | ||
1102 | if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) { | |
1103 | reg = mtk_eint_get_offset(pctl, d->hwirq, | |
1104 | eint_offsets->sens_clr); | |
1105 | writel(mask, reg); | |
1106 | } else { | |
1107 | reg = mtk_eint_get_offset(pctl, d->hwirq, | |
1108 | eint_offsets->sens_set); | |
1109 | writel(mask, reg); | |
1110 | } | |
1111 | ||
3221f40b YC |
1112 | if (pctl->eint_dual_edges[d->hwirq]) |
1113 | mtk_eint_flip_edge(pctl, d->hwirq); | |
1114 | ||
d9819eb9 MM |
1115 | return 0; |
1116 | } | |
1117 | ||
58a5e1b6 MM |
1118 | static int mtk_eint_irq_set_wake(struct irq_data *d, unsigned int on) |
1119 | { | |
1120 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
1121 | int shift = d->hwirq & 0x1f; | |
1122 | int reg = d->hwirq >> 5; | |
1123 | ||
1124 | if (on) | |
1125 | pctl->wake_mask[reg] |= BIT(shift); | |
1126 | else | |
1127 | pctl->wake_mask[reg] &= ~BIT(shift); | |
1128 | ||
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | static void mtk_eint_chip_write_mask(const struct mtk_eint_offsets *chip, | |
1133 | void __iomem *eint_reg_base, u32 *buf) | |
1134 | { | |
1135 | int port; | |
1136 | void __iomem *reg; | |
1137 | ||
1138 | for (port = 0; port < chip->ports; port++) { | |
1139 | reg = eint_reg_base + (port << 2); | |
1140 | writel_relaxed(~buf[port], reg + chip->mask_set); | |
1141 | writel_relaxed(buf[port], reg + chip->mask_clr); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | static void mtk_eint_chip_read_mask(const struct mtk_eint_offsets *chip, | |
1146 | void __iomem *eint_reg_base, u32 *buf) | |
1147 | { | |
1148 | int port; | |
1149 | void __iomem *reg; | |
1150 | ||
1151 | for (port = 0; port < chip->ports; port++) { | |
1152 | reg = eint_reg_base + chip->mask + (port << 2); | |
1153 | buf[port] = ~readl_relaxed(reg); | |
1154 | /* Mask is 0 when irq is enabled, and 1 when disabled. */ | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | static int mtk_eint_suspend(struct device *device) | |
1159 | { | |
1160 | void __iomem *reg; | |
1161 | struct mtk_pinctrl *pctl = dev_get_drvdata(device); | |
1162 | const struct mtk_eint_offsets *eint_offsets = | |
1163 | &pctl->devdata->eint_offsets; | |
1164 | ||
1165 | reg = pctl->eint_reg_base; | |
1166 | mtk_eint_chip_read_mask(eint_offsets, reg, pctl->cur_mask); | |
1167 | mtk_eint_chip_write_mask(eint_offsets, reg, pctl->wake_mask); | |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static int mtk_eint_resume(struct device *device) | |
1173 | { | |
1174 | struct mtk_pinctrl *pctl = dev_get_drvdata(device); | |
1175 | const struct mtk_eint_offsets *eint_offsets = | |
1176 | &pctl->devdata->eint_offsets; | |
1177 | ||
1178 | mtk_eint_chip_write_mask(eint_offsets, | |
1179 | pctl->eint_reg_base, pctl->cur_mask); | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | const struct dev_pm_ops mtk_eint_pm_ops = { | |
d2fcd62a | 1185 | .suspend_noirq = mtk_eint_suspend, |
1186 | .resume_noirq = mtk_eint_resume, | |
58a5e1b6 MM |
1187 | }; |
1188 | ||
d9819eb9 MM |
1189 | static void mtk_eint_ack(struct irq_data *d) |
1190 | { | |
1191 | struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
1192 | const struct mtk_eint_offsets *eint_offsets = | |
1193 | &pctl->devdata->eint_offsets; | |
1194 | u32 mask = BIT(d->hwirq & 0x1f); | |
1195 | void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, | |
1196 | eint_offsets->ack); | |
1197 | ||
1198 | writel(mask, reg); | |
1199 | } | |
1200 | ||
1201 | static struct irq_chip mtk_pinctrl_irq_chip = { | |
1202 | .name = "mt-eint", | |
58a5e1b6 | 1203 | .irq_disable = mtk_eint_mask, |
d9819eb9 MM |
1204 | .irq_mask = mtk_eint_mask, |
1205 | .irq_unmask = mtk_eint_unmask, | |
1206 | .irq_ack = mtk_eint_ack, | |
1207 | .irq_set_type = mtk_eint_set_type, | |
58a5e1b6 | 1208 | .irq_set_wake = mtk_eint_irq_set_wake, |
d9819eb9 MM |
1209 | .irq_request_resources = mtk_pinctrl_irq_request_resources, |
1210 | .irq_release_resources = mtk_pinctrl_irq_release_resources, | |
1211 | }; | |
1212 | ||
1213 | static unsigned int mtk_eint_init(struct mtk_pinctrl *pctl) | |
1214 | { | |
1215 | const struct mtk_eint_offsets *eint_offsets = | |
1216 | &pctl->devdata->eint_offsets; | |
1217 | void __iomem *reg = pctl->eint_reg_base + eint_offsets->dom_en; | |
1218 | unsigned int i; | |
1219 | ||
1220 | for (i = 0; i < pctl->devdata->ap_num; i += 32) { | |
1221 | writel(0xffffffff, reg); | |
1222 | reg += 4; | |
1223 | } | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | static inline void | |
1228 | mtk_eint_debounce_process(struct mtk_pinctrl *pctl, int index) | |
1229 | { | |
1230 | unsigned int rst, ctrl_offset; | |
1231 | unsigned int bit, dbnc; | |
1232 | const struct mtk_eint_offsets *eint_offsets = | |
1233 | &pctl->devdata->eint_offsets; | |
1234 | ||
1235 | ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_ctrl; | |
1236 | dbnc = readl(pctl->eint_reg_base + ctrl_offset); | |
1237 | bit = EINT_DBNC_SET_EN << ((index % 4) * 8); | |
1238 | if ((bit & dbnc) > 0) { | |
1239 | ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_set; | |
1240 | rst = EINT_DBNC_RST_BIT << ((index % 4) * 8); | |
1241 | writel(rst, pctl->eint_reg_base + ctrl_offset); | |
1242 | } | |
1243 | } | |
1244 | ||
bd0b9ac4 | 1245 | static void mtk_eint_irq_handler(struct irq_desc *desc) |
d9819eb9 | 1246 | { |
5663bb27 JL |
1247 | struct irq_chip *chip = irq_desc_get_chip(desc); |
1248 | struct mtk_pinctrl *pctl = irq_desc_get_handler_data(desc); | |
d9819eb9 MM |
1249 | unsigned int status, eint_num; |
1250 | int offset, index, virq; | |
1251 | const struct mtk_eint_offsets *eint_offsets = | |
1252 | &pctl->devdata->eint_offsets; | |
1253 | void __iomem *reg = mtk_eint_get_offset(pctl, 0, eint_offsets->stat); | |
3221f40b YC |
1254 | int dual_edges, start_level, curr_level; |
1255 | const struct mtk_desc_pin *pin; | |
d9819eb9 MM |
1256 | |
1257 | chained_irq_enter(chip, desc); | |
5edf673d | 1258 | for (eint_num = 0; |
1259 | eint_num < pctl->devdata->ap_num; | |
1260 | eint_num += 32, reg += 4) { | |
d9819eb9 | 1261 | status = readl(reg); |
d9819eb9 MM |
1262 | while (status) { |
1263 | offset = __ffs(status); | |
1264 | index = eint_num + offset; | |
1265 | virq = irq_find_mapping(pctl->domain, index); | |
1266 | status &= ~BIT(offset); | |
1267 | ||
3221f40b YC |
1268 | dual_edges = pctl->eint_dual_edges[index]; |
1269 | if (dual_edges) { | |
1270 | /* Clear soft-irq in case we raised it | |
1271 | last time */ | |
1272 | writel(BIT(offset), reg - eint_offsets->stat + | |
1273 | eint_offsets->soft_clr); | |
1274 | ||
1275 | pin = mtk_find_pin_by_eint_num(pctl, index); | |
1276 | start_level = mtk_gpio_get(pctl->chip, | |
1277 | pin->pin.number); | |
1278 | } | |
1279 | ||
d9819eb9 MM |
1280 | generic_handle_irq(virq); |
1281 | ||
3221f40b YC |
1282 | if (dual_edges) { |
1283 | curr_level = mtk_eint_flip_edge(pctl, index); | |
1284 | ||
1285 | /* If level changed, we might lost one edge | |
1286 | interrupt, raised it through soft-irq */ | |
1287 | if (start_level != curr_level) | |
1288 | writel(BIT(offset), reg - | |
1289 | eint_offsets->stat + | |
1290 | eint_offsets->soft_set); | |
1291 | } | |
1292 | ||
d9819eb9 MM |
1293 | if (index < pctl->devdata->db_cnt) |
1294 | mtk_eint_debounce_process(pctl , index); | |
1295 | } | |
1296 | } | |
1297 | chained_irq_exit(chip, desc); | |
1298 | } | |
1299 | ||
a6df410d HY |
1300 | static int mtk_pctrl_build_state(struct platform_device *pdev) |
1301 | { | |
1302 | struct mtk_pinctrl *pctl = platform_get_drvdata(pdev); | |
1303 | int i; | |
1304 | ||
1305 | pctl->ngroups = pctl->devdata->npins; | |
1306 | ||
1307 | /* Allocate groups */ | |
0206caa8 AL |
1308 | pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups, |
1309 | sizeof(*pctl->groups), GFP_KERNEL); | |
a6df410d HY |
1310 | if (!pctl->groups) |
1311 | return -ENOMEM; | |
1312 | ||
1313 | /* We assume that one pin is one group, use pin name as group name. */ | |
0206caa8 AL |
1314 | pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups, |
1315 | sizeof(*pctl->grp_names), GFP_KERNEL); | |
a6df410d HY |
1316 | if (!pctl->grp_names) |
1317 | return -ENOMEM; | |
1318 | ||
1319 | for (i = 0; i < pctl->devdata->npins; i++) { | |
1320 | const struct mtk_desc_pin *pin = pctl->devdata->pins + i; | |
1321 | struct mtk_pinctrl_group *group = pctl->groups + i; | |
1322 | ||
1323 | group->name = pin->pin.name; | |
1324 | group->pin = pin->pin.number; | |
1325 | ||
1326 | pctl->grp_names[i] = pin->pin.name; | |
1327 | } | |
1328 | ||
1329 | return 0; | |
1330 | } | |
1331 | ||
a6df410d | 1332 | int mtk_pctrl_init(struct platform_device *pdev, |
fc59e66c HY |
1333 | const struct mtk_pinctrl_devdata *data, |
1334 | struct regmap *regmap) | |
a6df410d HY |
1335 | { |
1336 | struct pinctrl_pin_desc *pins; | |
1337 | struct mtk_pinctrl *pctl; | |
1338 | struct device_node *np = pdev->dev.of_node, *node; | |
1339 | struct property *prop; | |
d9819eb9 | 1340 | struct resource *res; |
58a5e1b6 | 1341 | int i, ret, irq, ports_buf; |
a6df410d HY |
1342 | |
1343 | pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); | |
1344 | if (!pctl) | |
1345 | return -ENOMEM; | |
1346 | ||
1347 | platform_set_drvdata(pdev, pctl); | |
1348 | ||
1349 | prop = of_find_property(np, "pins-are-numbered", NULL); | |
1350 | if (!prop) { | |
c445cac3 | 1351 | dev_err(&pdev->dev, "only support pins-are-numbered format\n"); |
a6df410d HY |
1352 | return -EINVAL; |
1353 | } | |
1354 | ||
1355 | node = of_parse_phandle(np, "mediatek,pctl-regmap", 0); | |
1356 | if (node) { | |
1357 | pctl->regmap1 = syscon_node_to_regmap(node); | |
1358 | if (IS_ERR(pctl->regmap1)) | |
1359 | return PTR_ERR(pctl->regmap1); | |
fc59e66c HY |
1360 | } else if (regmap) { |
1361 | pctl->regmap1 = regmap; | |
1362 | } else { | |
1363 | dev_err(&pdev->dev, "Pinctrl node has not register regmap.\n"); | |
1364 | return -EINVAL; | |
a6df410d HY |
1365 | } |
1366 | ||
1367 | /* Only 8135 has two base addr, other SoCs have only one. */ | |
1368 | node = of_parse_phandle(np, "mediatek,pctl-regmap", 1); | |
1369 | if (node) { | |
1370 | pctl->regmap2 = syscon_node_to_regmap(node); | |
1371 | if (IS_ERR(pctl->regmap2)) | |
1372 | return PTR_ERR(pctl->regmap2); | |
1373 | } | |
1374 | ||
1375 | pctl->devdata = data; | |
1376 | ret = mtk_pctrl_build_state(pdev); | |
1377 | if (ret) { | |
1378 | dev_err(&pdev->dev, "build state failed: %d\n", ret); | |
1379 | return -EINVAL; | |
1380 | } | |
1381 | ||
0206caa8 | 1382 | pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins), |
a6df410d HY |
1383 | GFP_KERNEL); |
1384 | if (!pins) | |
1385 | return -ENOMEM; | |
1386 | ||
1387 | for (i = 0; i < pctl->devdata->npins; i++) | |
1388 | pins[i] = pctl->devdata->pins[i].pin; | |
d48c2c02 HY |
1389 | |
1390 | pctl->pctl_desc.name = dev_name(&pdev->dev); | |
1391 | pctl->pctl_desc.owner = THIS_MODULE; | |
1392 | pctl->pctl_desc.pins = pins; | |
1393 | pctl->pctl_desc.npins = pctl->devdata->npins; | |
1394 | pctl->pctl_desc.confops = &mtk_pconf_ops; | |
1395 | pctl->pctl_desc.pctlops = &mtk_pctrl_ops; | |
1396 | pctl->pctl_desc.pmxops = &mtk_pmx_ops; | |
a6df410d | 1397 | pctl->dev = &pdev->dev; |
d48c2c02 | 1398 | |
03a3a558 LD |
1399 | pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc, |
1400 | pctl); | |
323de9ef | 1401 | if (IS_ERR(pctl->pctl_dev)) { |
a6df410d | 1402 | dev_err(&pdev->dev, "couldn't register pinctrl driver\n"); |
323de9ef | 1403 | return PTR_ERR(pctl->pctl_dev); |
a6df410d HY |
1404 | } |
1405 | ||
1406 | pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL); | |
03a3a558 LD |
1407 | if (!pctl->chip) |
1408 | return -ENOMEM; | |
a6df410d | 1409 | |
fc63d854 | 1410 | *pctl->chip = mtk_gpio_chip; |
a6df410d HY |
1411 | pctl->chip->ngpio = pctl->devdata->npins; |
1412 | pctl->chip->label = dev_name(&pdev->dev); | |
58383c78 | 1413 | pctl->chip->parent = &pdev->dev; |
fc59e66c | 1414 | pctl->chip->base = -1; |
a6df410d | 1415 | |
11aa679a | 1416 | ret = gpiochip_add_data(pctl->chip, pctl); |
03a3a558 LD |
1417 | if (ret) |
1418 | return -EINVAL; | |
a6df410d HY |
1419 | |
1420 | /* Register the GPIO to pin mappings. */ | |
1421 | ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev), | |
1422 | 0, 0, pctl->devdata->npins); | |
1423 | if (ret) { | |
1424 | ret = -EINVAL; | |
1425 | goto chip_error; | |
1426 | } | |
1427 | ||
fc63d854 | 1428 | if (!of_property_read_bool(np, "interrupt-controller")) |
fc59e66c HY |
1429 | return 0; |
1430 | ||
d9819eb9 MM |
1431 | /* Get EINT register base from dts. */ |
1432 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1433 | if (!res) { | |
1434 | dev_err(&pdev->dev, "Unable to get Pinctrl resource\n"); | |
1435 | ret = -EINVAL; | |
1436 | goto chip_error; | |
1437 | } | |
1438 | ||
1439 | pctl->eint_reg_base = devm_ioremap_resource(&pdev->dev, res); | |
1440 | if (IS_ERR(pctl->eint_reg_base)) { | |
1441 | ret = -EINVAL; | |
1442 | goto chip_error; | |
1443 | } | |
1444 | ||
58a5e1b6 MM |
1445 | ports_buf = pctl->devdata->eint_offsets.ports; |
1446 | pctl->wake_mask = devm_kcalloc(&pdev->dev, ports_buf, | |
1447 | sizeof(*pctl->wake_mask), GFP_KERNEL); | |
1448 | if (!pctl->wake_mask) { | |
1449 | ret = -ENOMEM; | |
1450 | goto chip_error; | |
1451 | } | |
1452 | ||
1453 | pctl->cur_mask = devm_kcalloc(&pdev->dev, ports_buf, | |
1454 | sizeof(*pctl->cur_mask), GFP_KERNEL); | |
1455 | if (!pctl->cur_mask) { | |
1456 | ret = -ENOMEM; | |
1457 | goto chip_error; | |
1458 | } | |
1459 | ||
0206caa8 AL |
1460 | pctl->eint_dual_edges = devm_kcalloc(&pdev->dev, pctl->devdata->ap_num, |
1461 | sizeof(int), GFP_KERNEL); | |
3221f40b YC |
1462 | if (!pctl->eint_dual_edges) { |
1463 | ret = -ENOMEM; | |
1464 | goto chip_error; | |
1465 | } | |
1466 | ||
d9819eb9 MM |
1467 | irq = irq_of_parse_and_map(np, 0); |
1468 | if (!irq) { | |
1469 | dev_err(&pdev->dev, "couldn't parse and map irq\n"); | |
1470 | ret = -EINVAL; | |
61a35576 | 1471 | goto chip_error; |
d9819eb9 MM |
1472 | } |
1473 | ||
1474 | pctl->domain = irq_domain_add_linear(np, | |
1475 | pctl->devdata->ap_num, &irq_domain_simple_ops, NULL); | |
1476 | if (!pctl->domain) { | |
1477 | dev_err(&pdev->dev, "Couldn't register IRQ domain\n"); | |
1478 | ret = -ENOMEM; | |
61a35576 | 1479 | goto chip_error; |
d9819eb9 MM |
1480 | } |
1481 | ||
1482 | mtk_eint_init(pctl); | |
1483 | for (i = 0; i < pctl->devdata->ap_num; i++) { | |
1484 | int virq = irq_create_mapping(pctl->domain, i); | |
1485 | ||
1486 | irq_set_chip_and_handler(virq, &mtk_pinctrl_irq_chip, | |
1487 | handle_level_irq); | |
1488 | irq_set_chip_data(virq, pctl); | |
e4411899 | 1489 | } |
d9819eb9 | 1490 | |
1e105921 | 1491 | irq_set_chained_handler_and_data(irq, mtk_eint_irq_handler, pctl); |
a6df410d HY |
1492 | return 0; |
1493 | ||
1494 | chip_error: | |
1495 | gpiochip_remove(pctl->chip); | |
a6df410d HY |
1496 | return ret; |
1497 | } |