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26#include <linux/module.h>
27#include <linux/platform_device.h>
28#include <linux/io.h>
29#include <linux/bitops.h>
30#include <linux/gpio.h>
31#include <linux/of_address.h>
32#include <linux/of_irq.h>
33#include <linux/pinctrl/machine.h>
34#include <linux/pinctrl/pinconf.h>
35#include <linux/pinctrl/pinctrl.h>
36#include <linux/pinctrl/pinmux.h>
37#include <linux/pinctrl/pinconf-generic.h>
38#include <linux/irqchip/chained_irq.h>
39#include <linux/clk.h>
40#include <dt-bindings/pinctrl/rockchip.h>
41
42#include "core.h"
43#include "pinconf.h"
44
45
46#define GPIO_SWPORT_DR 0x00
47#define GPIO_SWPORT_DDR 0x04
48#define GPIO_INTEN 0x30
49#define GPIO_INTMASK 0x34
50#define GPIO_INTTYPE_LEVEL 0x38
51#define GPIO_INT_POLARITY 0x3c
52#define GPIO_INT_STATUS 0x40
53#define GPIO_INT_RAWSTATUS 0x44
54#define GPIO_DEBOUNCE 0x48
55#define GPIO_PORTS_EOI 0x4c
56#define GPIO_EXT_PORT 0x50
57#define GPIO_LS_SYNC 0x60
58
59
60
61
62
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64
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66
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72
73
74
75struct rockchip_pin_bank {
76 void __iomem *reg_base;
77 struct clk *clk;
78 int irq;
79 u32 pin_base;
80 u8 nr_pins;
81 char *name;
82 u8 bank_num;
83 bool valid;
84 struct device_node *of_node;
85 struct rockchip_pinctrl *drvdata;
86 struct irq_domain *domain;
87 struct gpio_chip gpio_chip;
88 struct pinctrl_gpio_range grange;
89 spinlock_t slock;
90
91};
92
93#define PIN_BANK(id, pins, label) \
94 { \
95 .bank_num = id, \
96 .nr_pins = pins, \
97 .name = label, \
98 }
99
100
101
102
103
104struct rockchip_pin_ctrl {
105 struct rockchip_pin_bank *pin_banks;
106 u32 nr_banks;
107 u32 nr_pins;
108 char *label;
109 int mux_offset;
110 int pull_offset;
111 bool pull_auto;
112 int pull_bank_stride;
113};
114
115struct rockchip_pin_config {
116 unsigned int func;
117 unsigned long *configs;
118 unsigned int nconfigs;
119};
120
121
122
123
124
125
126
127
128
129
130struct rockchip_pin_group {
131 const char *name;
132 unsigned int npins;
133 unsigned int *pins;
134 struct rockchip_pin_config *data;
135};
136
137
138
139
140
141
142
143struct rockchip_pmx_func {
144 const char *name;
145 const char **groups;
146 u8 ngroups;
147};
148
149struct rockchip_pinctrl {
150 void __iomem *reg_base;
151 struct device *dev;
152 struct rockchip_pin_ctrl *ctrl;
153 struct pinctrl_desc pctl;
154 struct pinctrl_dev *pctl_dev;
155 struct rockchip_pin_group *groups;
156 unsigned int ngroups;
157 struct rockchip_pmx_func *functions;
158 unsigned int nfunctions;
159};
160
161static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
162{
163 return container_of(gc, struct rockchip_pin_bank, gpio_chip);
164}
165
166static const inline struct rockchip_pin_group *pinctrl_name_to_group(
167 const struct rockchip_pinctrl *info,
168 const char *name)
169{
170 int i;
171
172 for (i = 0; i < info->ngroups; i++) {
173 if (!strcmp(info->groups[i].name, name))
174 return &info->groups[i];
175 }
176
177 return NULL;
178}
179
180
181
182
183
184static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
185 unsigned pin)
186{
187 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
188
189 while (pin >= (b->pin_base + b->nr_pins))
190 b++;
191
192 return b;
193}
194
195static struct rockchip_pin_bank *bank_num_to_bank(
196 struct rockchip_pinctrl *info,
197 unsigned num)
198{
199 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
200 int i;
201
202 for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
203 if (b->bank_num == num)
204 return b;
205 }
206
207 return ERR_PTR(-EINVAL);
208}
209
210
211
212
213
214static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
215{
216 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
217
218 return info->ngroups;
219}
220
221static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
222 unsigned selector)
223{
224 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
225
226 return info->groups[selector].name;
227}
228
229static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
230 unsigned selector, const unsigned **pins,
231 unsigned *npins)
232{
233 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
234
235 if (selector >= info->ngroups)
236 return -EINVAL;
237
238 *pins = info->groups[selector].pins;
239 *npins = info->groups[selector].npins;
240
241 return 0;
242}
243
244static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
245 struct device_node *np,
246 struct pinctrl_map **map, unsigned *num_maps)
247{
248 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
249 const struct rockchip_pin_group *grp;
250 struct pinctrl_map *new_map;
251 struct device_node *parent;
252 int map_num = 1;
253 int i;
254
255
256
257
258
259 grp = pinctrl_name_to_group(info, np->name);
260 if (!grp) {
261 dev_err(info->dev, "unable to find group for node %s\n",
262 np->name);
263 return -EINVAL;
264 }
265
266 map_num += grp->npins;
267 new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
268 GFP_KERNEL);
269 if (!new_map)
270 return -ENOMEM;
271
272 *map = new_map;
273 *num_maps = map_num;
274
275
276 parent = of_get_parent(np);
277 if (!parent) {
278 devm_kfree(pctldev->dev, new_map);
279 return -EINVAL;
280 }
281 new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
282 new_map[0].data.mux.function = parent->name;
283 new_map[0].data.mux.group = np->name;
284 of_node_put(parent);
285
286
287 new_map++;
288 for (i = 0; i < grp->npins; i++) {
289 new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
290 new_map[i].data.configs.group_or_pin =
291 pin_get_name(pctldev, grp->pins[i]);
292 new_map[i].data.configs.configs = grp->data[i].configs;
293 new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
294 }
295
296 dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
297 (*map)->data.mux.function, (*map)->data.mux.group, map_num);
298
299 return 0;
300}
301
302static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
303 struct pinctrl_map *map, unsigned num_maps)
304{
305}
306
307static const struct pinctrl_ops rockchip_pctrl_ops = {
308 .get_groups_count = rockchip_get_groups_count,
309 .get_group_name = rockchip_get_group_name,
310 .get_group_pins = rockchip_get_group_pins,
311 .dt_node_to_map = rockchip_dt_node_to_map,
312 .dt_free_map = rockchip_dt_free_map,
313};
314
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329
330
331
332static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
333{
334 struct rockchip_pinctrl *info = bank->drvdata;
335 void __iomem *reg = info->reg_base + info->ctrl->mux_offset;
336 unsigned long flags;
337 u8 bit;
338 u32 data;
339
340 dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
341 bank->bank_num, pin, mux);
342
343
344 reg += bank->bank_num * 0x10;
345 reg += (pin / 8) * 4;
346 bit = (pin % 8) * 2;
347
348 spin_lock_irqsave(&bank->slock, flags);
349
350 data = (3 << (bit + 16));
351 data |= (mux & 3) << bit;
352 writel(data, reg);
353
354 spin_unlock_irqrestore(&bank->slock, flags);
355}
356
357static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
358{
359 struct rockchip_pinctrl *info = bank->drvdata;
360 struct rockchip_pin_ctrl *ctrl = info->ctrl;
361 void __iomem *reg;
362 u8 bit;
363
364
365 if (!ctrl->pull_offset)
366 return PIN_CONFIG_BIAS_DISABLE;
367
368 reg = info->reg_base + ctrl->pull_offset;
369
370 if (ctrl->pull_auto) {
371 reg += bank->bank_num * ctrl->pull_bank_stride;
372 reg += (pin_num / 16) * 4;
373 bit = pin_num % 16;
374
375 return !(readl_relaxed(reg) & BIT(bit))
376 ? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
377 : PIN_CONFIG_BIAS_DISABLE;
378 } else {
379 dev_err(info->dev, "pull support for rk31xx not implemented\n");
380 return -EIO;
381 }
382}
383
384static int rockchip_set_pull(struct rockchip_pin_bank *bank,
385 int pin_num, int pull)
386{
387 struct rockchip_pinctrl *info = bank->drvdata;
388 struct rockchip_pin_ctrl *ctrl = info->ctrl;
389 void __iomem *reg;
390 unsigned long flags;
391 u8 bit;
392 u32 data;
393
394 dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
395 bank->bank_num, pin_num, pull);
396
397
398 if (!ctrl->pull_offset)
399 return pull ? -EINVAL : 0;
400
401 reg = info->reg_base + ctrl->pull_offset;
402
403 if (ctrl->pull_auto) {
404 if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
405 pull != PIN_CONFIG_BIAS_DISABLE) {
406 dev_err(info->dev, "only PIN_DEFAULT and DISABLE allowed\n");
407 return -EINVAL;
408 }
409
410 reg += bank->bank_num * ctrl->pull_bank_stride;
411 reg += (pin_num / 16) * 4;
412 bit = pin_num % 16;
413
414 spin_lock_irqsave(&bank->slock, flags);
415
416 data = BIT(bit + 16);
417 if (pull == PIN_CONFIG_BIAS_DISABLE)
418 data |= BIT(bit);
419 writel(data, reg);
420
421 spin_unlock_irqrestore(&bank->slock, flags);
422 } else {
423 if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT) {
424 dev_err(info->dev, "pull direction (up/down) needs to be specified\n");
425 return -EINVAL;
426 }
427
428 dev_err(info->dev, "pull support for rk31xx not implemented\n");
429 return -EIO;
430 }
431
432 return 0;
433}
434
435
436
437
438
439static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
440{
441 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
442
443 return info->nfunctions;
444}
445
446static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
447 unsigned selector)
448{
449 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
450
451 return info->functions[selector].name;
452}
453
454static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
455 unsigned selector, const char * const **groups,
456 unsigned * const num_groups)
457{
458 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
459
460 *groups = info->functions[selector].groups;
461 *num_groups = info->functions[selector].ngroups;
462
463 return 0;
464}
465
466static int rockchip_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
467 unsigned group)
468{
469 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
470 const unsigned int *pins = info->groups[group].pins;
471 const struct rockchip_pin_config *data = info->groups[group].data;
472 struct rockchip_pin_bank *bank;
473 int cnt;
474
475 dev_dbg(info->dev, "enable function %s group %s\n",
476 info->functions[selector].name, info->groups[group].name);
477
478
479
480
481
482 for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
483 bank = pin_to_bank(info, pins[cnt]);
484 rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
485 data[cnt].func);
486 }
487
488 return 0;
489}
490
491static void rockchip_pmx_disable(struct pinctrl_dev *pctldev,
492 unsigned selector, unsigned group)
493{
494 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
495 const unsigned int *pins = info->groups[group].pins;
496 struct rockchip_pin_bank *bank;
497 int cnt;
498
499 dev_dbg(info->dev, "disable function %s group %s\n",
500 info->functions[selector].name, info->groups[group].name);
501
502 for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
503 bank = pin_to_bank(info, pins[cnt]);
504 rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
505 }
506}
507
508
509
510
511
512
513static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
514 struct pinctrl_gpio_range *range,
515 unsigned offset, bool input)
516{
517 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
518 struct rockchip_pin_bank *bank;
519 struct gpio_chip *chip;
520 int pin;
521 u32 data;
522
523 chip = range->gc;
524 bank = gc_to_pin_bank(chip);
525 pin = offset - chip->base;
526
527 dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
528 offset, range->name, pin, input ? "input" : "output");
529
530 rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
531
532 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
533
534 if (!input)
535 data |= BIT(pin);
536 else
537 data &= ~BIT(pin);
538 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
539
540 return 0;
541}
542
543static const struct pinmux_ops rockchip_pmx_ops = {
544 .get_functions_count = rockchip_pmx_get_funcs_count,
545 .get_function_name = rockchip_pmx_get_func_name,
546 .get_function_groups = rockchip_pmx_get_groups,
547 .enable = rockchip_pmx_enable,
548 .disable = rockchip_pmx_disable,
549 .gpio_set_direction = rockchip_pmx_gpio_set_direction,
550};
551
552
553
554
555
556static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
557 enum pin_config_param pull)
558{
559
560 if (!ctrl->pull_offset)
561 return pull ? false : true;
562
563 if (ctrl->pull_auto) {
564 if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
565 pull != PIN_CONFIG_BIAS_DISABLE)
566 return false;
567 } else {
568 if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
569 return false;
570 }
571
572 return true;
573}
574
575
576static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
577 unsigned long *configs, unsigned num_configs)
578{
579 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
580 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
581 enum pin_config_param param;
582 u16 arg;
583 int i;
584 int rc;
585
586 for (i = 0; i < num_configs; i++) {
587 param = pinconf_to_config_param(configs[i]);
588 arg = pinconf_to_config_argument(configs[i]);
589
590 switch (param) {
591 case PIN_CONFIG_BIAS_DISABLE:
592 rc = rockchip_set_pull(bank, pin - bank->pin_base,
593 param);
594 if (rc)
595 return rc;
596 break;
597 case PIN_CONFIG_BIAS_PULL_UP:
598 case PIN_CONFIG_BIAS_PULL_DOWN:
599 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
600 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
601 return -ENOTSUPP;
602
603 if (!arg)
604 return -EINVAL;
605
606 rc = rockchip_set_pull(bank, pin - bank->pin_base,
607 param);
608 if (rc)
609 return rc;
610 break;
611 default:
612 return -ENOTSUPP;
613 break;
614 }
615 }
616
617 return 0;
618}
619
620
621static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
622 unsigned long *config)
623{
624 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
625 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
626 enum pin_config_param param = pinconf_to_config_param(*config);
627
628 switch (param) {
629 case PIN_CONFIG_BIAS_DISABLE:
630 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
631 return -EINVAL;
632
633 *config = 0;
634 break;
635 case PIN_CONFIG_BIAS_PULL_UP:
636 case PIN_CONFIG_BIAS_PULL_DOWN:
637 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
638 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
639 return -ENOTSUPP;
640
641 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
642 return -EINVAL;
643
644 *config = 1;
645 break;
646 default:
647 return -ENOTSUPP;
648 break;
649 }
650
651 return 0;
652}
653
654static const struct pinconf_ops rockchip_pinconf_ops = {
655 .pin_config_get = rockchip_pinconf_get,
656 .pin_config_set = rockchip_pinconf_set,
657};
658
659static const char *gpio_compat = "rockchip,gpio-bank";
660
661static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
662 struct device_node *np)
663{
664 struct device_node *child;
665
666 for_each_child_of_node(np, child) {
667 if (of_device_is_compatible(child, gpio_compat))
668 continue;
669
670 info->nfunctions++;
671 info->ngroups += of_get_child_count(child);
672 }
673}
674
675static int rockchip_pinctrl_parse_groups(struct device_node *np,
676 struct rockchip_pin_group *grp,
677 struct rockchip_pinctrl *info,
678 u32 index)
679{
680 struct rockchip_pin_bank *bank;
681 int size;
682 const __be32 *list;
683 int num;
684 int i, j;
685 int ret;
686
687 dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
688
689
690 grp->name = np->name;
691
692
693
694
695
696 list = of_get_property(np, "rockchip,pins", &size);
697
698 size /= sizeof(*list);
699 if (!size || size % 4) {
700 dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
701 return -EINVAL;
702 }
703
704 grp->npins = size / 4;
705
706 grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
707 GFP_KERNEL);
708 grp->data = devm_kzalloc(info->dev, grp->npins *
709 sizeof(struct rockchip_pin_config),
710 GFP_KERNEL);
711 if (!grp->pins || !grp->data)
712 return -ENOMEM;
713
714 for (i = 0, j = 0; i < size; i += 4, j++) {
715 const __be32 *phandle;
716 struct device_node *np_config;
717
718 num = be32_to_cpu(*list++);
719 bank = bank_num_to_bank(info, num);
720 if (IS_ERR(bank))
721 return PTR_ERR(bank);
722
723 grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
724 grp->data[j].func = be32_to_cpu(*list++);
725
726 phandle = list++;
727 if (!phandle)
728 return -EINVAL;
729
730 np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
731 ret = pinconf_generic_parse_dt_config(np_config,
732 &grp->data[j].configs, &grp->data[j].nconfigs);
733 if (ret)
734 return ret;
735 }
736
737 return 0;
738}
739
740static int rockchip_pinctrl_parse_functions(struct device_node *np,
741 struct rockchip_pinctrl *info,
742 u32 index)
743{
744 struct device_node *child;
745 struct rockchip_pmx_func *func;
746 struct rockchip_pin_group *grp;
747 int ret;
748 static u32 grp_index;
749 u32 i = 0;
750
751 dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
752
753 func = &info->functions[index];
754
755
756 func->name = np->name;
757 func->ngroups = of_get_child_count(np);
758 if (func->ngroups <= 0)
759 return 0;
760
761 func->groups = devm_kzalloc(info->dev,
762 func->ngroups * sizeof(char *), GFP_KERNEL);
763 if (!func->groups)
764 return -ENOMEM;
765
766 for_each_child_of_node(np, child) {
767 func->groups[i] = child->name;
768 grp = &info->groups[grp_index++];
769 ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
770 if (ret)
771 return ret;
772 }
773
774 return 0;
775}
776
777static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
778 struct rockchip_pinctrl *info)
779{
780 struct device *dev = &pdev->dev;
781 struct device_node *np = dev->of_node;
782 struct device_node *child;
783 int ret;
784 int i;
785
786 rockchip_pinctrl_child_count(info, np);
787
788 dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
789 dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
790
791 info->functions = devm_kzalloc(dev, info->nfunctions *
792 sizeof(struct rockchip_pmx_func),
793 GFP_KERNEL);
794 if (!info->functions) {
795 dev_err(dev, "failed to allocate memory for function list\n");
796 return -EINVAL;
797 }
798
799 info->groups = devm_kzalloc(dev, info->ngroups *
800 sizeof(struct rockchip_pin_group),
801 GFP_KERNEL);
802 if (!info->groups) {
803 dev_err(dev, "failed allocate memory for ping group list\n");
804 return -EINVAL;
805 }
806
807 i = 0;
808
809 for_each_child_of_node(np, child) {
810 if (of_device_is_compatible(child, gpio_compat))
811 continue;
812 ret = rockchip_pinctrl_parse_functions(child, info, i++);
813 if (ret) {
814 dev_err(&pdev->dev, "failed to parse function\n");
815 return ret;
816 }
817 }
818
819 return 0;
820}
821
822static int rockchip_pinctrl_register(struct platform_device *pdev,
823 struct rockchip_pinctrl *info)
824{
825 struct pinctrl_desc *ctrldesc = &info->pctl;
826 struct pinctrl_pin_desc *pindesc, *pdesc;
827 struct rockchip_pin_bank *pin_bank;
828 int pin, bank, ret;
829 int k;
830
831 ctrldesc->name = "rockchip-pinctrl";
832 ctrldesc->owner = THIS_MODULE;
833 ctrldesc->pctlops = &rockchip_pctrl_ops;
834 ctrldesc->pmxops = &rockchip_pmx_ops;
835 ctrldesc->confops = &rockchip_pinconf_ops;
836
837 pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
838 info->ctrl->nr_pins, GFP_KERNEL);
839 if (!pindesc) {
840 dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
841 return -ENOMEM;
842 }
843 ctrldesc->pins = pindesc;
844 ctrldesc->npins = info->ctrl->nr_pins;
845
846 pdesc = pindesc;
847 for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
848 pin_bank = &info->ctrl->pin_banks[bank];
849 for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
850 pdesc->number = k;
851 pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
852 pin_bank->name, pin);
853 pdesc++;
854 }
855 }
856
857 info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
858 if (!info->pctl_dev) {
859 dev_err(&pdev->dev, "could not register pinctrl driver\n");
860 return -EINVAL;
861 }
862
863 for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
864 pin_bank = &info->ctrl->pin_banks[bank];
865 pin_bank->grange.name = pin_bank->name;
866 pin_bank->grange.id = bank;
867 pin_bank->grange.pin_base = pin_bank->pin_base;
868 pin_bank->grange.base = pin_bank->gpio_chip.base;
869 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
870 pin_bank->grange.gc = &pin_bank->gpio_chip;
871 pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
872 }
873
874 ret = rockchip_pinctrl_parse_dt(pdev, info);
875 if (ret) {
876 pinctrl_unregister(info->pctl_dev);
877 return ret;
878 }
879
880 return 0;
881}
882
883
884
885
886
887static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset)
888{
889 return pinctrl_request_gpio(chip->base + offset);
890}
891
892static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset)
893{
894 pinctrl_free_gpio(chip->base + offset);
895}
896
897static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
898{
899 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
900 void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
901 unsigned long flags;
902 u32 data;
903
904 spin_lock_irqsave(&bank->slock, flags);
905
906 data = readl(reg);
907 data &= ~BIT(offset);
908 if (value)
909 data |= BIT(offset);
910 writel(data, reg);
911
912 spin_unlock_irqrestore(&bank->slock, flags);
913}
914
915
916
917
918
919static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
920{
921 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
922 u32 data;
923
924 data = readl(bank->reg_base + GPIO_EXT_PORT);
925 data >>= offset;
926 data &= 1;
927 return data;
928}
929
930
931
932
933
934
935static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
936{
937 return pinctrl_gpio_direction_input(gc->base + offset);
938}
939
940
941
942
943
944
945static int rockchip_gpio_direction_output(struct gpio_chip *gc,
946 unsigned offset, int value)
947{
948 rockchip_gpio_set(gc, offset, value);
949 return pinctrl_gpio_direction_output(gc->base + offset);
950}
951
952
953
954
955
956static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
957{
958 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
959 unsigned int virq;
960
961 if (!bank->domain)
962 return -ENXIO;
963
964 virq = irq_create_mapping(bank->domain, offset);
965
966 return (virq) ? : -ENXIO;
967}
968
969static const struct gpio_chip rockchip_gpiolib_chip = {
970 .request = rockchip_gpio_request,
971 .free = rockchip_gpio_free,
972 .set = rockchip_gpio_set,
973 .get = rockchip_gpio_get,
974 .direction_input = rockchip_gpio_direction_input,
975 .direction_output = rockchip_gpio_direction_output,
976 .to_irq = rockchip_gpio_to_irq,
977 .owner = THIS_MODULE,
978};
979
980
981
982
983
984static void rockchip_irq_demux(unsigned int irq, struct irq_desc *desc)
985{
986 struct irq_chip *chip = irq_get_chip(irq);
987 struct rockchip_pin_bank *bank = irq_get_handler_data(irq);
988 u32 pend;
989
990 dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
991
992 chained_irq_enter(chip, desc);
993
994 pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
995
996 while (pend) {
997 unsigned int virq;
998
999 irq = __ffs(pend);
1000 pend &= ~BIT(irq);
1001 virq = irq_linear_revmap(bank->domain, irq);
1002
1003 if (!virq) {
1004 dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
1005 continue;
1006 }
1007
1008 dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
1009
1010 generic_handle_irq(virq);
1011 }
1012
1013 chained_irq_exit(chip, desc);
1014}
1015
1016static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
1017{
1018 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1019 struct rockchip_pin_bank *bank = gc->private;
1020 u32 mask = BIT(d->hwirq);
1021 u32 polarity;
1022 u32 level;
1023 u32 data;
1024
1025 if (type & IRQ_TYPE_EDGE_BOTH)
1026 __irq_set_handler_locked(d->irq, handle_edge_irq);
1027 else
1028 __irq_set_handler_locked(d->irq, handle_level_irq);
1029
1030 irq_gc_lock(gc);
1031
1032 level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
1033 polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
1034
1035 switch (type) {
1036 case IRQ_TYPE_EDGE_RISING:
1037 level |= mask;
1038 polarity |= mask;
1039 break;
1040 case IRQ_TYPE_EDGE_FALLING:
1041 level |= mask;
1042 polarity &= ~mask;
1043 break;
1044 case IRQ_TYPE_LEVEL_HIGH:
1045 level &= ~mask;
1046 polarity |= mask;
1047 break;
1048 case IRQ_TYPE_LEVEL_LOW:
1049 level &= ~mask;
1050 polarity &= ~mask;
1051 break;
1052 default:
1053 irq_gc_unlock(gc);
1054 return -EINVAL;
1055 }
1056
1057 writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
1058 writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
1059
1060 irq_gc_unlock(gc);
1061
1062
1063 rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
1064 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
1065 data &= ~mask;
1066 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
1067
1068 return 0;
1069}
1070
1071static int rockchip_interrupts_register(struct platform_device *pdev,
1072 struct rockchip_pinctrl *info)
1073{
1074 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1075 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1076 unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
1077 struct irq_chip_generic *gc;
1078 int ret;
1079 int i;
1080
1081 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1082 if (!bank->valid) {
1083 dev_warn(&pdev->dev, "bank %s is not valid\n",
1084 bank->name);
1085 continue;
1086 }
1087
1088 bank->domain = irq_domain_add_linear(bank->of_node, 32,
1089 &irq_generic_chip_ops, NULL);
1090 if (!bank->domain) {
1091 dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
1092 bank->name);
1093 continue;
1094 }
1095
1096 ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
1097 "rockchip_gpio_irq", handle_level_irq,
1098 clr, 0, IRQ_GC_INIT_MASK_CACHE);
1099 if (ret) {
1100 dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
1101 bank->name);
1102 irq_domain_remove(bank->domain);
1103 continue;
1104 }
1105
1106 gc = irq_get_domain_generic_chip(bank->domain, 0);
1107 gc->reg_base = bank->reg_base;
1108 gc->private = bank;
1109 gc->chip_types[0].regs.mask = GPIO_INTEN;
1110 gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
1111 gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
1112 gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
1113 gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
1114 gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
1115 gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
1116
1117 irq_set_handler_data(bank->irq, bank);
1118 irq_set_chained_handler(bank->irq, rockchip_irq_demux);
1119 }
1120
1121 return 0;
1122}
1123
1124static int rockchip_gpiolib_register(struct platform_device *pdev,
1125 struct rockchip_pinctrl *info)
1126{
1127 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1128 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1129 struct gpio_chip *gc;
1130 int ret;
1131 int i;
1132
1133 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1134 if (!bank->valid) {
1135 dev_warn(&pdev->dev, "bank %s is not valid\n",
1136 bank->name);
1137 continue;
1138 }
1139
1140 bank->gpio_chip = rockchip_gpiolib_chip;
1141
1142 gc = &bank->gpio_chip;
1143 gc->base = bank->pin_base;
1144 gc->ngpio = bank->nr_pins;
1145 gc->dev = &pdev->dev;
1146 gc->of_node = bank->of_node;
1147 gc->label = bank->name;
1148
1149 ret = gpiochip_add(gc);
1150 if (ret) {
1151 dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
1152 gc->label, ret);
1153 goto fail;
1154 }
1155 }
1156
1157 rockchip_interrupts_register(pdev, info);
1158
1159 return 0;
1160
1161fail:
1162 for (--i, --bank; i >= 0; --i, --bank) {
1163 if (!bank->valid)
1164 continue;
1165
1166 if (gpiochip_remove(&bank->gpio_chip))
1167 dev_err(&pdev->dev, "gpio chip %s remove failed\n",
1168 bank->gpio_chip.label);
1169 }
1170 return ret;
1171}
1172
1173static int rockchip_gpiolib_unregister(struct platform_device *pdev,
1174 struct rockchip_pinctrl *info)
1175{
1176 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1177 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1178 int ret = 0;
1179 int i;
1180
1181 for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank) {
1182 if (!bank->valid)
1183 continue;
1184
1185 ret = gpiochip_remove(&bank->gpio_chip);
1186 }
1187
1188 if (ret)
1189 dev_err(&pdev->dev, "gpio chip remove failed\n");
1190
1191 return ret;
1192}
1193
1194static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
1195 struct device *dev)
1196{
1197 struct resource res;
1198
1199 if (of_address_to_resource(bank->of_node, 0, &res)) {
1200 dev_err(dev, "cannot find IO resource for bank\n");
1201 return -ENOENT;
1202 }
1203
1204 bank->reg_base = devm_ioremap_resource(dev, &res);
1205 if (IS_ERR(bank->reg_base))
1206 return PTR_ERR(bank->reg_base);
1207
1208 bank->irq = irq_of_parse_and_map(bank->of_node, 0);
1209
1210 bank->clk = of_clk_get(bank->of_node, 0);
1211 if (IS_ERR(bank->clk))
1212 return PTR_ERR(bank->clk);
1213
1214 return clk_prepare_enable(bank->clk);
1215}
1216
1217static const struct of_device_id rockchip_pinctrl_dt_match[];
1218
1219
1220static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
1221 struct rockchip_pinctrl *d,
1222 struct platform_device *pdev)
1223{
1224 const struct of_device_id *match;
1225 struct device_node *node = pdev->dev.of_node;
1226 struct device_node *np;
1227 struct rockchip_pin_ctrl *ctrl;
1228 struct rockchip_pin_bank *bank;
1229 int i;
1230
1231 match = of_match_node(rockchip_pinctrl_dt_match, node);
1232 ctrl = (struct rockchip_pin_ctrl *)match->data;
1233
1234 for_each_child_of_node(node, np) {
1235 if (!of_find_property(np, "gpio-controller", NULL))
1236 continue;
1237
1238 bank = ctrl->pin_banks;
1239 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1240 if (!strcmp(bank->name, np->name)) {
1241 bank->of_node = np;
1242
1243 if (!rockchip_get_bank_data(bank, &pdev->dev))
1244 bank->valid = true;
1245
1246 break;
1247 }
1248 }
1249 }
1250
1251 bank = ctrl->pin_banks;
1252 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1253 spin_lock_init(&bank->slock);
1254 bank->drvdata = d;
1255 bank->pin_base = ctrl->nr_pins;
1256 ctrl->nr_pins += bank->nr_pins;
1257 }
1258
1259 return ctrl;
1260}
1261
1262static int rockchip_pinctrl_probe(struct platform_device *pdev)
1263{
1264 struct rockchip_pinctrl *info;
1265 struct device *dev = &pdev->dev;
1266 struct rockchip_pin_ctrl *ctrl;
1267 struct resource *res;
1268 int ret;
1269
1270 if (!dev->of_node) {
1271 dev_err(dev, "device tree node not found\n");
1272 return -ENODEV;
1273 }
1274
1275 info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
1276 if (!info)
1277 return -ENOMEM;
1278
1279 ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
1280 if (!ctrl) {
1281 dev_err(dev, "driver data not available\n");
1282 return -EINVAL;
1283 }
1284 info->ctrl = ctrl;
1285 info->dev = dev;
1286
1287 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1288 info->reg_base = devm_ioremap_resource(&pdev->dev, res);
1289 if (IS_ERR(info->reg_base))
1290 return PTR_ERR(info->reg_base);
1291
1292 ret = rockchip_gpiolib_register(pdev, info);
1293 if (ret)
1294 return ret;
1295
1296 ret = rockchip_pinctrl_register(pdev, info);
1297 if (ret) {
1298 rockchip_gpiolib_unregister(pdev, info);
1299 return ret;
1300 }
1301
1302 platform_set_drvdata(pdev, info);
1303
1304 return 0;
1305}
1306
1307static struct rockchip_pin_bank rk2928_pin_banks[] = {
1308 PIN_BANK(0, 32, "gpio0"),
1309 PIN_BANK(1, 32, "gpio1"),
1310 PIN_BANK(2, 32, "gpio2"),
1311 PIN_BANK(3, 32, "gpio3"),
1312};
1313
1314static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
1315 .pin_banks = rk2928_pin_banks,
1316 .nr_banks = ARRAY_SIZE(rk2928_pin_banks),
1317 .label = "RK2928-GPIO",
1318 .mux_offset = 0xa8,
1319 .pull_offset = 0x118,
1320 .pull_auto = 1,
1321 .pull_bank_stride = 8,
1322};
1323
1324static struct rockchip_pin_bank rk3066a_pin_banks[] = {
1325 PIN_BANK(0, 32, "gpio0"),
1326 PIN_BANK(1, 32, "gpio1"),
1327 PIN_BANK(2, 32, "gpio2"),
1328 PIN_BANK(3, 32, "gpio3"),
1329 PIN_BANK(4, 32, "gpio4"),
1330 PIN_BANK(6, 16, "gpio6"),
1331};
1332
1333static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
1334 .pin_banks = rk3066a_pin_banks,
1335 .nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
1336 .label = "RK3066a-GPIO",
1337 .mux_offset = 0xa8,
1338 .pull_offset = 0x118,
1339 .pull_auto = 1,
1340 .pull_bank_stride = 8,
1341};
1342
1343static struct rockchip_pin_bank rk3066b_pin_banks[] = {
1344 PIN_BANK(0, 32, "gpio0"),
1345 PIN_BANK(1, 32, "gpio1"),
1346 PIN_BANK(2, 32, "gpio2"),
1347 PIN_BANK(3, 32, "gpio3"),
1348};
1349
1350static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
1351 .pin_banks = rk3066b_pin_banks,
1352 .nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
1353 .label = "RK3066b-GPIO",
1354 .mux_offset = 0x60,
1355 .pull_offset = -EINVAL,
1356};
1357
1358static struct rockchip_pin_bank rk3188_pin_banks[] = {
1359 PIN_BANK(0, 32, "gpio0"),
1360 PIN_BANK(1, 32, "gpio1"),
1361 PIN_BANK(2, 32, "gpio2"),
1362 PIN_BANK(3, 32, "gpio3"),
1363};
1364
1365static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
1366 .pin_banks = rk3188_pin_banks,
1367 .nr_banks = ARRAY_SIZE(rk3188_pin_banks),
1368 .label = "RK3188-GPIO",
1369 .mux_offset = 0x68,
1370 .pull_offset = 0x164,
1371 .pull_bank_stride = 16,
1372};
1373
1374static const struct of_device_id rockchip_pinctrl_dt_match[] = {
1375 { .compatible = "rockchip,rk2928-pinctrl",
1376 .data = (void *)&rk2928_pin_ctrl },
1377 { .compatible = "rockchip,rk3066a-pinctrl",
1378 .data = (void *)&rk3066a_pin_ctrl },
1379 { .compatible = "rockchip,rk3066b-pinctrl",
1380 .data = (void *)&rk3066b_pin_ctrl },
1381 { .compatible = "rockchip,rk3188-pinctrl",
1382 .data = (void *)&rk3188_pin_ctrl },
1383 {},
1384};
1385MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
1386
1387static struct platform_driver rockchip_pinctrl_driver = {
1388 .probe = rockchip_pinctrl_probe,
1389 .driver = {
1390 .name = "rockchip-pinctrl",
1391 .owner = THIS_MODULE,
1392 .of_match_table = rockchip_pinctrl_dt_match,
1393 },
1394};
1395
1396static int __init rockchip_pinctrl_drv_register(void)
1397{
1398 return platform_driver_register(&rockchip_pinctrl_driver);
1399}
1400postcore_initcall(rockchip_pinctrl_drv_register);
1401
1402MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
1403MODULE_DESCRIPTION("Rockchip pinctrl driver");
1404MODULE_LICENSE("GPL v2");
1405
