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11#include <linux/gpio/driver.h>
12#include "pinctrl-moore.h"
13
14#define PINCTRL_PINCTRL_DEV KBUILD_MODNAME
15
16
17#define MTK_PIN_CONFIG_TDSEL (PIN_CONFIG_END + 1)
18#define MTK_PIN_CONFIG_RDSEL (PIN_CONFIG_END + 2)
19#define MTK_PIN_CONFIG_PU_ADV (PIN_CONFIG_END + 3)
20#define MTK_PIN_CONFIG_PD_ADV (PIN_CONFIG_END + 4)
21
22static const struct pinconf_generic_params mtk_custom_bindings[] = {
23 {"mediatek,tdsel", MTK_PIN_CONFIG_TDSEL, 0},
24 {"mediatek,rdsel", MTK_PIN_CONFIG_RDSEL, 0},
25 {"mediatek,pull-up-adv", MTK_PIN_CONFIG_PU_ADV, 1},
26 {"mediatek,pull-down-adv", MTK_PIN_CONFIG_PD_ADV, 1},
27};
28
29#ifdef CONFIG_DEBUG_FS
30static const struct pin_config_item mtk_conf_items[] = {
31 PCONFDUMP(MTK_PIN_CONFIG_TDSEL, "tdsel", NULL, true),
32 PCONFDUMP(MTK_PIN_CONFIG_RDSEL, "rdsel", NULL, true),
33 PCONFDUMP(MTK_PIN_CONFIG_PU_ADV, "pu-adv", NULL, true),
34 PCONFDUMP(MTK_PIN_CONFIG_PD_ADV, "pd-adv", NULL, true),
35};
36#endif
37
38static int mtk_pinmux_set_mux(struct pinctrl_dev *pctldev,
39 unsigned int selector, unsigned int group)
40{
41 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
42 struct function_desc *func;
43 struct group_desc *grp;
44 int i;
45
46 func = pinmux_generic_get_function(pctldev, selector);
47 if (!func)
48 return -EINVAL;
49
50 grp = pinctrl_generic_get_group(pctldev, group);
51 if (!grp)
52 return -EINVAL;
53
54 dev_dbg(pctldev->dev, "enable function %s group %s\n",
55 func->name, grp->name);
56
57 for (i = 0; i < grp->num_pins; i++) {
58 const struct mtk_pin_desc *desc;
59 int *pin_modes = grp->data;
60 int pin = grp->pins[i];
61
62 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
63 if (!desc->name)
64 return -ENOTSUPP;
65
66 mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
67 pin_modes[i]);
68 }
69
70 return 0;
71}
72
73static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev,
74 struct pinctrl_gpio_range *range,
75 unsigned int pin)
76{
77 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
78 const struct mtk_pin_desc *desc;
79
80 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
81 if (!desc->name)
82 return -ENOTSUPP;
83
84 return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
85 hw->soc->gpio_m);
86}
87
88static int mtk_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
89 struct pinctrl_gpio_range *range,
90 unsigned int pin, bool input)
91{
92 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
93 const struct mtk_pin_desc *desc;
94
95 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
96 if (!desc->name)
97 return -ENOTSUPP;
98
99
100 return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input);
101}
102
103static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
104 unsigned int pin, unsigned long *config)
105{
106 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
107 u32 param = pinconf_to_config_param(*config);
108 int val, val2, err, reg, ret = 1;
109 const struct mtk_pin_desc *desc;
110
111 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
112 if (!desc->name)
113 return -ENOTSUPP;
114
115 switch (param) {
116 case PIN_CONFIG_BIAS_DISABLE:
117 if (hw->soc->bias_disable_get) {
118 err = hw->soc->bias_disable_get(hw, desc, &ret);
119 if (err)
120 return err;
121 } else {
122 return -ENOTSUPP;
123 }
124 break;
125 case PIN_CONFIG_BIAS_PULL_UP:
126 if (hw->soc->bias_get) {
127 err = hw->soc->bias_get(hw, desc, 1, &ret);
128 if (err)
129 return err;
130 } else {
131 return -ENOTSUPP;
132 }
133 break;
134 case PIN_CONFIG_BIAS_PULL_DOWN:
135 if (hw->soc->bias_get) {
136 err = hw->soc->bias_get(hw, desc, 0, &ret);
137 if (err)
138 return err;
139 } else {
140 return -ENOTSUPP;
141 }
142 break;
143 case PIN_CONFIG_SLEW_RATE:
144 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &val);
145 if (err)
146 return err;
147
148 if (!val)
149 return -EINVAL;
150
151 break;
152 case PIN_CONFIG_INPUT_ENABLE:
153 case PIN_CONFIG_OUTPUT_ENABLE:
154 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val);
155 if (err)
156 return err;
157
158
159 if ((val && param == PIN_CONFIG_INPUT_ENABLE) ||
160 (!val && param == PIN_CONFIG_OUTPUT_ENABLE))
161 return -EINVAL;
162
163 break;
164 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
165 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val);
166 if (err)
167 return err;
168
169 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &val2);
170 if (err)
171 return err;
172
173 if (val || !val2)
174 return -EINVAL;
175
176 break;
177 case PIN_CONFIG_DRIVE_STRENGTH:
178 if (hw->soc->drive_get) {
179 err = hw->soc->drive_get(hw, desc, &ret);
180 if (err)
181 return err;
182 } else {
183 err = -ENOTSUPP;
184 }
185 break;
186 case MTK_PIN_CONFIG_TDSEL:
187 case MTK_PIN_CONFIG_RDSEL:
188 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
189 PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
190
191 err = mtk_hw_get_value(hw, desc, reg, &val);
192 if (err)
193 return err;
194
195 ret = val;
196
197 break;
198 case MTK_PIN_CONFIG_PU_ADV:
199 case MTK_PIN_CONFIG_PD_ADV:
200 if (hw->soc->adv_pull_get) {
201 bool pullup;
202
203 pullup = param == MTK_PIN_CONFIG_PU_ADV;
204 err = hw->soc->adv_pull_get(hw, desc, pullup, &ret);
205 if (err)
206 return err;
207 } else {
208 return -ENOTSUPP;
209 }
210 break;
211 default:
212 return -ENOTSUPP;
213 }
214
215 *config = pinconf_to_config_packed(param, ret);
216
217 return 0;
218}
219
220static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
221 unsigned long *configs, unsigned int num_configs)
222{
223 struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
224 const struct mtk_pin_desc *desc;
225 u32 reg, param, arg;
226 int cfg, err = 0;
227
228 desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
229 if (!desc->name)
230 return -ENOTSUPP;
231
232 for (cfg = 0; cfg < num_configs; cfg++) {
233 param = pinconf_to_config_param(configs[cfg]);
234 arg = pinconf_to_config_argument(configs[cfg]);
235
236 switch (param) {
237 case PIN_CONFIG_BIAS_DISABLE:
238 if (hw->soc->bias_disable_set) {
239 err = hw->soc->bias_disable_set(hw, desc);
240 if (err)
241 return err;
242 } else {
243 return -ENOTSUPP;
244 }
245 break;
246 case PIN_CONFIG_BIAS_PULL_UP:
247 if (hw->soc->bias_set) {
248 err = hw->soc->bias_set(hw, desc, 1);
249 if (err)
250 return err;
251 } else {
252 return -ENOTSUPP;
253 }
254 break;
255 case PIN_CONFIG_BIAS_PULL_DOWN:
256 if (hw->soc->bias_set) {
257 err = hw->soc->bias_set(hw, desc, 0);
258 if (err)
259 return err;
260 } else {
261 return -ENOTSUPP;
262 }
263 break;
264 case PIN_CONFIG_OUTPUT_ENABLE:
265 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
266 MTK_DISABLE);
267 if (err)
268 goto err;
269
270 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
271 MTK_OUTPUT);
272 if (err)
273 goto err;
274 break;
275 case PIN_CONFIG_INPUT_ENABLE:
276
277 if (hw->soc->ies_present) {
278 mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES,
279 MTK_ENABLE);
280 }
281
282 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
283 MTK_INPUT);
284 if (err)
285 goto err;
286 break;
287 case PIN_CONFIG_SLEW_RATE:
288 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR,
289 arg);
290 if (err)
291 goto err;
292
293 break;
294 case PIN_CONFIG_OUTPUT:
295 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
296 MTK_OUTPUT);
297 if (err)
298 goto err;
299
300 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO,
301 arg);
302 if (err)
303 goto err;
304 break;
305 case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
306
307
308
309 arg = arg ? 2 : 1;
310 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
311 arg & 1);
312 if (err)
313 goto err;
314
315 err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT,
316 !!(arg & 2));
317 if (err)
318 goto err;
319 break;
320 case PIN_CONFIG_DRIVE_STRENGTH:
321 if (hw->soc->drive_set) {
322 err = hw->soc->drive_set(hw, desc, arg);
323 if (err)
324 return err;
325 } else {
326 err = -ENOTSUPP;
327 }
328 break;
329 case MTK_PIN_CONFIG_TDSEL:
330 case MTK_PIN_CONFIG_RDSEL:
331 reg = (param == MTK_PIN_CONFIG_TDSEL) ?
332 PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL;
333
334 err = mtk_hw_set_value(hw, desc, reg, arg);
335 if (err)
336 goto err;
337 break;
338 case MTK_PIN_CONFIG_PU_ADV:
339 case MTK_PIN_CONFIG_PD_ADV:
340 if (hw->soc->adv_pull_set) {
341 bool pullup;
342
343 pullup = param == MTK_PIN_CONFIG_PU_ADV;
344 err = hw->soc->adv_pull_set(hw, desc, pullup,
345 arg);
346 if (err)
347 return err;
348 } else {
349 return -ENOTSUPP;
350 }
351 break;
352 default:
353 err = -ENOTSUPP;
354 }
355 }
356err:
357 return err;
358}
359
360static int mtk_pinconf_group_get(struct pinctrl_dev *pctldev,
361 unsigned int group, unsigned long *config)
362{
363 const unsigned int *pins;
364 unsigned int i, npins, old = 0;
365 int ret;
366
367 ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
368 if (ret)
369 return ret;
370
371 for (i = 0; i < npins; i++) {
372 if (mtk_pinconf_get(pctldev, pins[i], config))
373 return -ENOTSUPP;
374
375
376 if (i && old != *config)
377 return -ENOTSUPP;
378
379 old = *config;
380 }
381
382 return 0;
383}
384
385static int mtk_pinconf_group_set(struct pinctrl_dev *pctldev,
386 unsigned int group, unsigned long *configs,
387 unsigned int num_configs)
388{
389 const unsigned int *pins;
390 unsigned int i, npins;
391 int ret;
392
393 ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
394 if (ret)
395 return ret;
396
397 for (i = 0; i < npins; i++) {
398 ret = mtk_pinconf_set(pctldev, pins[i], configs, num_configs);
399 if (ret)
400 return ret;
401 }
402
403 return 0;
404}
405
406static const struct pinctrl_ops mtk_pctlops = {
407 .get_groups_count = pinctrl_generic_get_group_count,
408 .get_group_name = pinctrl_generic_get_group_name,
409 .get_group_pins = pinctrl_generic_get_group_pins,
410 .dt_node_to_map = pinconf_generic_dt_node_to_map_all,
411 .dt_free_map = pinconf_generic_dt_free_map,
412};
413
414static const struct pinmux_ops mtk_pmxops = {
415 .get_functions_count = pinmux_generic_get_function_count,
416 .get_function_name = pinmux_generic_get_function_name,
417 .get_function_groups = pinmux_generic_get_function_groups,
418 .set_mux = mtk_pinmux_set_mux,
419 .gpio_request_enable = mtk_pinmux_gpio_request_enable,
420 .gpio_set_direction = mtk_pinmux_gpio_set_direction,
421 .strict = true,
422};
423
424static const struct pinconf_ops mtk_confops = {
425 .is_generic = true,
426 .pin_config_get = mtk_pinconf_get,
427 .pin_config_set = mtk_pinconf_set,
428 .pin_config_group_get = mtk_pinconf_group_get,
429 .pin_config_group_set = mtk_pinconf_group_set,
430 .pin_config_config_dbg_show = pinconf_generic_dump_config,
431};
432
433static struct pinctrl_desc mtk_desc = {
434 .name = PINCTRL_PINCTRL_DEV,
435 .pctlops = &mtk_pctlops,
436 .pmxops = &mtk_pmxops,
437 .confops = &mtk_confops,
438 .owner = THIS_MODULE,
439};
440
441static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
442{
443 struct mtk_pinctrl *hw = gpiochip_get_data(chip);
444 const struct mtk_pin_desc *desc;
445 int value, err;
446
447 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
448 if (!desc->name)
449 return -ENOTSUPP;
450
451 err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
452 if (err)
453 return err;
454
455 return !!value;
456}
457
458static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
459{
460 struct mtk_pinctrl *hw = gpiochip_get_data(chip);
461 const struct mtk_pin_desc *desc;
462
463 desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
464 if (!desc->name) {
465 dev_err(hw->dev, "Failed to set gpio %d\n", gpio);
466 return;
467 }
468
469 mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
470}
471
472static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio)
473{
474 return pinctrl_gpio_direction_input(chip->base + gpio);
475}
476
477static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
478 int value)
479{
480 mtk_gpio_set(chip, gpio, value);
481
482 return pinctrl_gpio_direction_output(chip->base + gpio);
483}
484
485static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
486{
487 struct mtk_pinctrl *hw = gpiochip_get_data(chip);
488 const struct mtk_pin_desc *desc;
489
490 if (!hw->eint)
491 return -ENOTSUPP;
492
493 desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
494
495 if (desc->eint.eint_n == (u16)EINT_NA)
496 return -ENOTSUPP;
497
498 return mtk_eint_find_irq(hw->eint, desc->eint.eint_n);
499}
500
501static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
502 unsigned long config)
503{
504 struct mtk_pinctrl *hw = gpiochip_get_data(chip);
505 const struct mtk_pin_desc *desc;
506 u32 debounce;
507
508 desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset];
509 if (!desc->name)
510 return -ENOTSUPP;
511
512 if (!hw->eint ||
513 pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE ||
514 desc->eint.eint_n == (u16)EINT_NA)
515 return -ENOTSUPP;
516
517 debounce = pinconf_to_config_argument(config);
518
519 return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce);
520}
521
522static int mtk_build_gpiochip(struct mtk_pinctrl *hw)
523{
524 struct gpio_chip *chip = &hw->chip;
525 int ret;
526
527 chip->label = PINCTRL_PINCTRL_DEV;
528 chip->parent = hw->dev;
529 chip->request = gpiochip_generic_request;
530 chip->free = gpiochip_generic_free;
531 chip->direction_input = mtk_gpio_direction_input;
532 chip->direction_output = mtk_gpio_direction_output;
533 chip->get = mtk_gpio_get;
534 chip->set = mtk_gpio_set;
535 chip->to_irq = mtk_gpio_to_irq;
536 chip->set_config = mtk_gpio_set_config;
537 chip->base = -1;
538 chip->ngpio = hw->soc->npins;
539 chip->of_gpio_n_cells = 2;
540
541 ret = gpiochip_add_data(chip, hw);
542 if (ret < 0)
543 return ret;
544
545
546
547
548
549
550
551
552 if (!of_find_property(hw->dev->of_node, "gpio-ranges", NULL)) {
553 ret = gpiochip_add_pin_range(chip, dev_name(hw->dev), 0, 0,
554 chip->ngpio);
555 if (ret < 0) {
556 gpiochip_remove(chip);
557 return ret;
558 }
559 }
560
561 return 0;
562}
563
564static int mtk_build_groups(struct mtk_pinctrl *hw)
565{
566 int err, i;
567
568 for (i = 0; i < hw->soc->ngrps; i++) {
569 const struct group_desc *group = hw->soc->grps + i;
570
571 err = pinctrl_generic_add_group(hw->pctrl, group->name,
572 group->pins, group->num_pins,
573 group->data);
574 if (err < 0) {
575 dev_err(hw->dev, "Failed to register group %s\n",
576 group->name);
577 return err;
578 }
579 }
580
581 return 0;
582}
583
584static int mtk_build_functions(struct mtk_pinctrl *hw)
585{
586 int i, err;
587
588 for (i = 0; i < hw->soc->nfuncs ; i++) {
589 const struct function_desc *func = hw->soc->funcs + i;
590
591 err = pinmux_generic_add_function(hw->pctrl, func->name,
592 func->group_names,
593 func->num_group_names,
594 func->data);
595 if (err < 0) {
596 dev_err(hw->dev, "Failed to register function %s\n",
597 func->name);
598 return err;
599 }
600 }
601
602 return 0;
603}
604
605int mtk_moore_pinctrl_probe(struct platform_device *pdev,
606 const struct mtk_pin_soc *soc)
607{
608 struct device *dev = &pdev->dev;
609 struct pinctrl_pin_desc *pins;
610 struct mtk_pinctrl *hw;
611 int err, i;
612
613 hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL);
614 if (!hw)
615 return -ENOMEM;
616
617 hw->soc = soc;
618 hw->dev = &pdev->dev;
619
620 if (!hw->soc->nbase_names)
621 return dev_err_probe(dev, -EINVAL,
622 "SoC should be assigned at least one register base\n");
623
624 hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names,
625 sizeof(*hw->base), GFP_KERNEL);
626 if (!hw->base)
627 return -ENOMEM;
628
629 for (i = 0; i < hw->soc->nbase_names; i++) {
630 hw->base[i] = devm_platform_ioremap_resource_byname(pdev,
631 hw->soc->base_names[i]);
632 if (IS_ERR(hw->base[i]))
633 return PTR_ERR(hw->base[i]);
634 }
635
636 hw->nbase = hw->soc->nbase_names;
637
638 spin_lock_init(&hw->lock);
639
640
641 pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins),
642 GFP_KERNEL);
643 if (!pins)
644 return -ENOMEM;
645
646 for (i = 0; i < hw->soc->npins; i++) {
647 pins[i].number = hw->soc->pins[i].number;
648 pins[i].name = hw->soc->pins[i].name;
649 }
650
651
652 mtk_desc.pins = (const struct pinctrl_pin_desc *)pins;
653 mtk_desc.npins = hw->soc->npins;
654 mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings);
655 mtk_desc.custom_params = mtk_custom_bindings;
656#ifdef CONFIG_DEBUG_FS
657 mtk_desc.custom_conf_items = mtk_conf_items;
658#endif
659
660 err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw,
661 &hw->pctrl);
662 if (err)
663 return err;
664
665
666 err = mtk_build_groups(hw);
667 if (err)
668 return dev_err_probe(dev, err, "Failed to build groups\n");
669
670
671 err = mtk_build_functions(hw);
672 if (err)
673 return dev_err_probe(dev, err, "Failed to build functions\n");
674
675
676
677
678 err = pinctrl_enable(hw->pctrl);
679 if (err)
680 return err;
681
682 err = mtk_build_eint(hw, pdev);
683 if (err)
684 dev_warn(&pdev->dev,
685 "Failed to add EINT, but pinctrl still can work\n");
686
687
688 err = mtk_build_gpiochip(hw);
689 if (err)
690 return dev_err_probe(dev, err, "Failed to add gpio_chip\n");
691
692 platform_set_drvdata(pdev, hw);
693
694 return 0;
695}
696
