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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux/fpc-iii.git] / drivers / pinctrl / pinctrl-rockchip.c
blob46dddc159286387dbbbe979d729d4d00cf159d43
1 /*
2 * Pinctrl driver for Rockchip SoCs
3 *
4 * Copyright (c) 2013 MundoReader S.L.
5 * Author: Heiko Stuebner <heiko@sntech.de>
6 *
7 * With some ideas taken from pinctrl-samsung:
8 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
9 * http://www.samsung.com
10 * Copyright (c) 2012 Linaro Ltd
11 * http://www.linaro.org
12 *
13 * and pinctrl-at91:
14 * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as published
18 * by the Free Software Foundation.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 */
25
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 /* GPIO control registers */
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 enum rockchip_pinctrl_type {
60 RK2928,
61 RK3066B,
62 RK3188,
63 };
64
65 enum rockchip_pin_bank_type {
66 COMMON_BANK,
67 RK3188_BANK0,
68 };
69
70 /**
71 * @reg_base: register base of the gpio bank
72 * @reg_pull: optional separate register for additional pull settings
73 * @clk: clock of the gpio bank
74 * @irq: interrupt of the gpio bank
75 * @pin_base: first pin number
76 * @nr_pins: number of pins in this bank
77 * @name: name of the bank
78 * @bank_num: number of the bank, to account for holes
79 * @valid: are all necessary informations present
80 * @of_node: dt node of this bank
81 * @drvdata: common pinctrl basedata
82 * @domain: irqdomain of the gpio bank
83 * @gpio_chip: gpiolib chip
84 * @grange: gpio range
85 * @slock: spinlock for the gpio bank
86 */
87 struct rockchip_pin_bank {
88 void __iomem *reg_base;
89 void __iomem *reg_pull;
90 struct clk *clk;
91 int irq;
92 u32 pin_base;
93 u8 nr_pins;
94 char *name;
95 u8 bank_num;
96 enum rockchip_pin_bank_type bank_type;
97 bool valid;
98 struct device_node *of_node;
99 struct rockchip_pinctrl *drvdata;
100 struct irq_domain *domain;
101 struct gpio_chip gpio_chip;
102 struct pinctrl_gpio_range grange;
103 spinlock_t slock;
104 u32 toggle_edge_mode;
105 };
106
107 #define PIN_BANK(id, pins, label) \
108 { \
109 .bank_num = id, \
110 .nr_pins = pins, \
111 .name = label, \
112 }
113
114 /**
115 */
116 struct rockchip_pin_ctrl {
117 struct rockchip_pin_bank *pin_banks;
118 u32 nr_banks;
119 u32 nr_pins;
120 char *label;
121 enum rockchip_pinctrl_type type;
122 int mux_offset;
123 void (*pull_calc_reg)(struct rockchip_pin_bank *bank, int pin_num,
124 void __iomem **reg, u8 *bit);
125 };
126
127 struct rockchip_pin_config {
128 unsigned int func;
129 unsigned long *configs;
130 unsigned int nconfigs;
131 };
132
133 /**
134 * struct rockchip_pin_group: represent group of pins of a pinmux function.
135 * @name: name of the pin group, used to lookup the group.
136 * @pins: the pins included in this group.
137 * @npins: number of pins included in this group.
138 * @func: the mux function number to be programmed when selected.
139 * @configs: the config values to be set for each pin
140 * @nconfigs: number of configs for each pin
141 */
142 struct rockchip_pin_group {
143 const char *name;
144 unsigned int npins;
145 unsigned int *pins;
146 struct rockchip_pin_config *data;
147 };
148
149 /**
150 * struct rockchip_pmx_func: represent a pin function.
151 * @name: name of the pin function, used to lookup the function.
152 * @groups: one or more names of pin groups that provide this function.
153 * @num_groups: number of groups included in @groups.
154 */
155 struct rockchip_pmx_func {
156 const char *name;
157 const char **groups;
158 u8 ngroups;
159 };
160
161 struct rockchip_pinctrl {
162 void __iomem *reg_base;
163 void __iomem *reg_pull;
164 struct device *dev;
165 struct rockchip_pin_ctrl *ctrl;
166 struct pinctrl_desc pctl;
167 struct pinctrl_dev *pctl_dev;
168 struct rockchip_pin_group *groups;
169 unsigned int ngroups;
170 struct rockchip_pmx_func *functions;
171 unsigned int nfunctions;
172 };
173
174 static inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc)
175 {
176 return container_of(gc, struct rockchip_pin_bank, gpio_chip);
177 }
178
179 static const inline struct rockchip_pin_group *pinctrl_name_to_group(
180 const struct rockchip_pinctrl *info,
181 const char *name)
182 {
183 int i;
184
185 for (i = 0; i < info->ngroups; i++) {
186 if (!strcmp(info->groups[i].name, name))
187 return &info->groups[i];
188 }
189
190 return NULL;
191 }
192
193 /*
194 * given a pin number that is local to a pin controller, find out the pin bank
195 * and the register base of the pin bank.
196 */
197 static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
198 unsigned pin)
199 {
200 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
201
202 while (pin >= (b->pin_base + b->nr_pins))
203 b++;
204
205 return b;
206 }
207
208 static struct rockchip_pin_bank *bank_num_to_bank(
209 struct rockchip_pinctrl *info,
210 unsigned num)
211 {
212 struct rockchip_pin_bank *b = info->ctrl->pin_banks;
213 int i;
214
215 for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
216 if (b->bank_num == num)
217 return b;
218 }
219
220 return ERR_PTR(-EINVAL);
221 }
222
223 /*
224 * Pinctrl_ops handling
225 */
226
227 static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
228 {
229 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
230
231 return info->ngroups;
232 }
233
234 static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
235 unsigned selector)
236 {
237 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
238
239 return info->groups[selector].name;
240 }
241
242 static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
243 unsigned selector, const unsigned **pins,
244 unsigned *npins)
245 {
246 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
247
248 if (selector >= info->ngroups)
249 return -EINVAL;
250
251 *pins = info->groups[selector].pins;
252 *npins = info->groups[selector].npins;
253
254 return 0;
255 }
256
257 static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
258 struct device_node *np,
259 struct pinctrl_map **map, unsigned *num_maps)
260 {
261 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
262 const struct rockchip_pin_group *grp;
263 struct pinctrl_map *new_map;
264 struct device_node *parent;
265 int map_num = 1;
266 int i;
267
268 /*
269 * first find the group of this node and check if we need to create
270 * config maps for pins
271 */
272 grp = pinctrl_name_to_group(info, np->name);
273 if (!grp) {
274 dev_err(info->dev, "unable to find group for node %s\n",
275 np->name);
276 return -EINVAL;
277 }
278
279 map_num += grp->npins;
280 new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
281 GFP_KERNEL);
282 if (!new_map)
283 return -ENOMEM;
284
285 *map = new_map;
286 *num_maps = map_num;
287
288 /* create mux map */
289 parent = of_get_parent(np);
290 if (!parent) {
291 devm_kfree(pctldev->dev, new_map);
292 return -EINVAL;
293 }
294 new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
295 new_map[0].data.mux.function = parent->name;
296 new_map[0].data.mux.group = np->name;
297 of_node_put(parent);
298
299 /* create config map */
300 new_map++;
301 for (i = 0; i < grp->npins; i++) {
302 new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
303 new_map[i].data.configs.group_or_pin =
304 pin_get_name(pctldev, grp->pins[i]);
305 new_map[i].data.configs.configs = grp->data[i].configs;
306 new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
307 }
308
309 dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
310 (*map)->data.mux.function, (*map)->data.mux.group, map_num);
311
312 return 0;
313 }
314
315 static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
316 struct pinctrl_map *map, unsigned num_maps)
317 {
318 }
319
320 static const struct pinctrl_ops rockchip_pctrl_ops = {
321 .get_groups_count = rockchip_get_groups_count,
322 .get_group_name = rockchip_get_group_name,
323 .get_group_pins = rockchip_get_group_pins,
324 .dt_node_to_map = rockchip_dt_node_to_map,
325 .dt_free_map = rockchip_dt_free_map,
326 };
327
328 /*
329 * Hardware access
330 */
331
332 /*
333 * Set a new mux function for a pin.
334 *
335 * The register is divided into the upper and lower 16 bit. When changing
336 * a value, the previous register value is not read and changed. Instead
337 * it seems the changed bits are marked in the upper 16 bit, while the
338 * changed value gets set in the same offset in the lower 16 bit.
339 * All pin settings seem to be 2 bit wide in both the upper and lower
340 * parts.
341 * @bank: pin bank to change
342 * @pin: pin to change
343 * @mux: new mux function to set
344 */
345 static void rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
346 {
347 struct rockchip_pinctrl *info = bank->drvdata;
348 void __iomem *reg = info->reg_base + info->ctrl->mux_offset;
349 unsigned long flags;
350 u8 bit;
351 u32 data;
352
353 dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
354 bank->bank_num, pin, mux);
355
356 /* get basic quadrupel of mux registers and the correct reg inside */
357 reg += bank->bank_num * 0x10;
358 reg += (pin / 8) * 4;
359 bit = (pin % 8) * 2;
360
361 spin_lock_irqsave(&bank->slock, flags);
362
363 data = (3 << (bit + 16));
364 data |= (mux & 3) << bit;
365 writel(data, reg);
366
367 spin_unlock_irqrestore(&bank->slock, flags);
368 }
369
370 #define RK2928_PULL_OFFSET 0x118
371 #define RK2928_PULL_PINS_PER_REG 16
372 #define RK2928_PULL_BANK_STRIDE 8
373
374 static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
375 int pin_num, void __iomem **reg, u8 *bit)
376 {
377 struct rockchip_pinctrl *info = bank->drvdata;
378
379 *reg = info->reg_base + RK2928_PULL_OFFSET;
380 *reg += bank->bank_num * RK2928_PULL_BANK_STRIDE;
381 *reg += (pin_num / RK2928_PULL_PINS_PER_REG) * 4;
382
383 *bit = pin_num % RK2928_PULL_PINS_PER_REG;
384 };
385
386 #define RK3188_PULL_BITS_PER_PIN 2
387 #define RK3188_PULL_PINS_PER_REG 8
388 #define RK3188_PULL_BANK_STRIDE 16
389
390 static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
391 int pin_num, void __iomem **reg, u8 *bit)
392 {
393 struct rockchip_pinctrl *info = bank->drvdata;
394
395 /* The first 12 pins of the first bank are located elsewhere */
396 if (bank->bank_type == RK3188_BANK0 && pin_num < 12) {
397 *reg = bank->reg_pull +
398 ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
399 *bit = pin_num % RK3188_PULL_PINS_PER_REG;
400 *bit *= RK3188_PULL_BITS_PER_PIN;
401 } else {
402 *reg = info->reg_pull - 4;
403 *reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
404 *reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
405
406 /*
407 * The bits in these registers have an inverse ordering
408 * with the lowest pin being in bits 15:14 and the highest
409 * pin in bits 1:0
410 */
411 *bit = 7 - (pin_num % RK3188_PULL_PINS_PER_REG);
412 *bit *= RK3188_PULL_BITS_PER_PIN;
413 }
414 }
415
416 static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
417 {
418 struct rockchip_pinctrl *info = bank->drvdata;
419 struct rockchip_pin_ctrl *ctrl = info->ctrl;
420 void __iomem *reg;
421 u8 bit;
422 u32 data;
423
424 /* rk3066b does support any pulls */
425 if (ctrl->type == RK3066B)
426 return PIN_CONFIG_BIAS_DISABLE;
427
428 ctrl->pull_calc_reg(bank, pin_num, &reg, &bit);
429
430 switch (ctrl->type) {
431 case RK2928:
432 return !(readl_relaxed(reg) & BIT(bit))
433 ? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
434 : PIN_CONFIG_BIAS_DISABLE;
435 case RK3188:
436 data = readl_relaxed(reg) >> bit;
437 data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
438
439 switch (data) {
440 case 0:
441 return PIN_CONFIG_BIAS_DISABLE;
442 case 1:
443 return PIN_CONFIG_BIAS_PULL_UP;
444 case 2:
445 return PIN_CONFIG_BIAS_PULL_DOWN;
446 case 3:
447 return PIN_CONFIG_BIAS_BUS_HOLD;
448 }
449
450 dev_err(info->dev, "unknown pull setting\n");
451 return -EIO;
452 default:
453 dev_err(info->dev, "unsupported pinctrl type\n");
454 return -EINVAL;
455 };
456 }
457
458 static int rockchip_set_pull(struct rockchip_pin_bank *bank,
459 int pin_num, int pull)
460 {
461 struct rockchip_pinctrl *info = bank->drvdata;
462 struct rockchip_pin_ctrl *ctrl = info->ctrl;
463 void __iomem *reg;
464 unsigned long flags;
465 u8 bit;
466 u32 data;
467
468 dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
469 bank->bank_num, pin_num, pull);
470
471 /* rk3066b does support any pulls */
472 if (ctrl->type == RK3066B)
473 return pull ? -EINVAL : 0;
474
475 ctrl->pull_calc_reg(bank, pin_num, &reg, &bit);
476
477 switch (ctrl->type) {
478 case RK2928:
479 spin_lock_irqsave(&bank->slock, flags);
480
481 data = BIT(bit + 16);
482 if (pull == PIN_CONFIG_BIAS_DISABLE)
483 data |= BIT(bit);
484 writel(data, reg);
485
486 spin_unlock_irqrestore(&bank->slock, flags);
487 break;
488 case RK3188:
489 spin_lock_irqsave(&bank->slock, flags);
490
491 /* enable the write to the equivalent lower bits */
492 data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16);
493
494 switch (pull) {
495 case PIN_CONFIG_BIAS_DISABLE:
496 break;
497 case PIN_CONFIG_BIAS_PULL_UP:
498 data |= (1 << bit);
499 break;
500 case PIN_CONFIG_BIAS_PULL_DOWN:
501 data |= (2 << bit);
502 break;
503 case PIN_CONFIG_BIAS_BUS_HOLD:
504 data |= (3 << bit);
505 break;
506 default:
507 spin_unlock_irqrestore(&bank->slock, flags);
508 dev_err(info->dev, "unsupported pull setting %d\n",
509 pull);
510 return -EINVAL;
511 }
512
513 writel(data, reg);
514
515 spin_unlock_irqrestore(&bank->slock, flags);
516 break;
517 default:
518 dev_err(info->dev, "unsupported pinctrl type\n");
519 return -EINVAL;
520 }
521
522 return 0;
523 }
524
525 /*
526 * Pinmux_ops handling
527 */
528
529 static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
530 {
531 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
532
533 return info->nfunctions;
534 }
535
536 static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
537 unsigned selector)
538 {
539 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
540
541 return info->functions[selector].name;
542 }
543
544 static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
545 unsigned selector, const char * const **groups,
546 unsigned * const num_groups)
547 {
548 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
549
550 *groups = info->functions[selector].groups;
551 *num_groups = info->functions[selector].ngroups;
552
553 return 0;
554 }
555
556 static int rockchip_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
557 unsigned group)
558 {
559 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
560 const unsigned int *pins = info->groups[group].pins;
561 const struct rockchip_pin_config *data = info->groups[group].data;
562 struct rockchip_pin_bank *bank;
563 int cnt;
564
565 dev_dbg(info->dev, "enable function %s group %s\n",
566 info->functions[selector].name, info->groups[group].name);
567
568 /*
569 * for each pin in the pin group selected, program the correspoding pin
570 * pin function number in the config register.
571 */
572 for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
573 bank = pin_to_bank(info, pins[cnt]);
574 rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
575 data[cnt].func);
576 }
577
578 return 0;
579 }
580
581 static void rockchip_pmx_disable(struct pinctrl_dev *pctldev,
582 unsigned selector, unsigned group)
583 {
584 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
585 const unsigned int *pins = info->groups[group].pins;
586 struct rockchip_pin_bank *bank;
587 int cnt;
588
589 dev_dbg(info->dev, "disable function %s group %s\n",
590 info->functions[selector].name, info->groups[group].name);
591
592 for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
593 bank = pin_to_bank(info, pins[cnt]);
594 rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
595 }
596 }
597
598 /*
599 * The calls to gpio_direction_output() and gpio_direction_input()
600 * leads to this function call (via the pinctrl_gpio_direction_{input|output}()
601 * function called from the gpiolib interface).
602 */
603 static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
604 struct pinctrl_gpio_range *range,
605 unsigned offset, bool input)
606 {
607 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
608 struct rockchip_pin_bank *bank;
609 struct gpio_chip *chip;
610 int pin;
611 u32 data;
612
613 chip = range->gc;
614 bank = gc_to_pin_bank(chip);
615 pin = offset - chip->base;
616
617 dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
618 offset, range->name, pin, input ? "input" : "output");
619
620 rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
621
622 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
623 /* set bit to 1 for output, 0 for input */
624 if (!input)
625 data |= BIT(pin);
626 else
627 data &= ~BIT(pin);
628 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
629
630 return 0;
631 }
632
633 static const struct pinmux_ops rockchip_pmx_ops = {
634 .get_functions_count = rockchip_pmx_get_funcs_count,
635 .get_function_name = rockchip_pmx_get_func_name,
636 .get_function_groups = rockchip_pmx_get_groups,
637 .enable = rockchip_pmx_enable,
638 .disable = rockchip_pmx_disable,
639 .gpio_set_direction = rockchip_pmx_gpio_set_direction,
640 };
641
642 /*
643 * Pinconf_ops handling
644 */
645
646 static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
647 enum pin_config_param pull)
648 {
649 switch (ctrl->type) {
650 case RK2928:
651 return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
652 pull == PIN_CONFIG_BIAS_DISABLE);
653 case RK3066B:
654 return pull ? false : true;
655 case RK3188:
656 return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
657 }
658
659 return false;
660 }
661
662 /* set the pin config settings for a specified pin */
663 static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
664 unsigned long *configs, unsigned num_configs)
665 {
666 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
667 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
668 enum pin_config_param param;
669 u16 arg;
670 int i;
671 int rc;
672
673 for (i = 0; i < num_configs; i++) {
674 param = pinconf_to_config_param(configs[i]);
675 arg = pinconf_to_config_argument(configs[i]);
676
677 switch (param) {
678 case PIN_CONFIG_BIAS_DISABLE:
679 rc = rockchip_set_pull(bank, pin - bank->pin_base,
680 param);
681 if (rc)
682 return rc;
683 break;
684 case PIN_CONFIG_BIAS_PULL_UP:
685 case PIN_CONFIG_BIAS_PULL_DOWN:
686 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
687 case PIN_CONFIG_BIAS_BUS_HOLD:
688 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
689 return -ENOTSUPP;
690
691 if (!arg)
692 return -EINVAL;
693
694 rc = rockchip_set_pull(bank, pin - bank->pin_base,
695 param);
696 if (rc)
697 return rc;
698 break;
699 default:
700 return -ENOTSUPP;
701 break;
702 }
703 } /* for each config */
704
705 return 0;
706 }
707
708 /* get the pin config settings for a specified pin */
709 static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
710 unsigned long *config)
711 {
712 struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
713 struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
714 enum pin_config_param param = pinconf_to_config_param(*config);
715
716 switch (param) {
717 case PIN_CONFIG_BIAS_DISABLE:
718 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
719 return -EINVAL;
720
721 *config = 0;
722 break;
723 case PIN_CONFIG_BIAS_PULL_UP:
724 case PIN_CONFIG_BIAS_PULL_DOWN:
725 case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
726 case PIN_CONFIG_BIAS_BUS_HOLD:
727 if (!rockchip_pinconf_pull_valid(info->ctrl, param))
728 return -ENOTSUPP;
729
730 if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
731 return -EINVAL;
732
733 *config = 1;
734 break;
735 default:
736 return -ENOTSUPP;
737 break;
738 }
739
740 return 0;
741 }
742
743 static const struct pinconf_ops rockchip_pinconf_ops = {
744 .pin_config_get = rockchip_pinconf_get,
745 .pin_config_set = rockchip_pinconf_set,
746 };
747
748 static const struct of_device_id rockchip_bank_match[] = {
749 { .compatible = "rockchip,gpio-bank" },
750 { .compatible = "rockchip,rk3188-gpio-bank0" },
751 {},
752 };
753
754 static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
755 struct device_node *np)
756 {
757 struct device_node *child;
758
759 for_each_child_of_node(np, child) {
760 if (of_match_node(rockchip_bank_match, child))
761 continue;
762
763 info->nfunctions++;
764 info->ngroups += of_get_child_count(child);
765 }
766 }
767
768 static int rockchip_pinctrl_parse_groups(struct device_node *np,
769 struct rockchip_pin_group *grp,
770 struct rockchip_pinctrl *info,
771 u32 index)
772 {
773 struct rockchip_pin_bank *bank;
774 int size;
775 const __be32 *list;
776 int num;
777 int i, j;
778 int ret;
779
780 dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
781
782 /* Initialise group */
783 grp->name = np->name;
784
785 /*
786 * the binding format is rockchip,pins = <bank pin mux CONFIG>,
787 * do sanity check and calculate pins number
788 */
789 list = of_get_property(np, "rockchip,pins", &size);
790 /* we do not check return since it's safe node passed down */
791 size /= sizeof(*list);
792 if (!size || size % 4) {
793 dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
794 return -EINVAL;
795 }
796
797 grp->npins = size / 4;
798
799 grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
800 GFP_KERNEL);
801 grp->data = devm_kzalloc(info->dev, grp->npins *
802 sizeof(struct rockchip_pin_config),
803 GFP_KERNEL);
804 if (!grp->pins || !grp->data)
805 return -ENOMEM;
806
807 for (i = 0, j = 0; i < size; i += 4, j++) {
808 const __be32 *phandle;
809 struct device_node *np_config;
810
811 num = be32_to_cpu(*list++);
812 bank = bank_num_to_bank(info, num);
813 if (IS_ERR(bank))
814 return PTR_ERR(bank);
815
816 grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
817 grp->data[j].func = be32_to_cpu(*list++);
818
819 phandle = list++;
820 if (!phandle)
821 return -EINVAL;
822
823 np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
824 ret = pinconf_generic_parse_dt_config(np_config,
825 &grp->data[j].configs, &grp->data[j].nconfigs);
826 if (ret)
827 return ret;
828 }
829
830 return 0;
831 }
832
833 static int rockchip_pinctrl_parse_functions(struct device_node *np,
834 struct rockchip_pinctrl *info,
835 u32 index)
836 {
837 struct device_node *child;
838 struct rockchip_pmx_func *func;
839 struct rockchip_pin_group *grp;
840 int ret;
841 static u32 grp_index;
842 u32 i = 0;
843
844 dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
845
846 func = &info->functions[index];
847
848 /* Initialise function */
849 func->name = np->name;
850 func->ngroups = of_get_child_count(np);
851 if (func->ngroups <= 0)
852 return 0;
853
854 func->groups = devm_kzalloc(info->dev,
855 func->ngroups * sizeof(char *), GFP_KERNEL);
856 if (!func->groups)
857 return -ENOMEM;
858
859 for_each_child_of_node(np, child) {
860 func->groups[i] = child->name;
861 grp = &info->groups[grp_index++];
862 ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
863 if (ret)
864 return ret;
865 }
866
867 return 0;
868 }
869
870 static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
871 struct rockchip_pinctrl *info)
872 {
873 struct device *dev = &pdev->dev;
874 struct device_node *np = dev->of_node;
875 struct device_node *child;
876 int ret;
877 int i;
878
879 rockchip_pinctrl_child_count(info, np);
880
881 dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
882 dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
883
884 info->functions = devm_kzalloc(dev, info->nfunctions *
885 sizeof(struct rockchip_pmx_func),
886 GFP_KERNEL);
887 if (!info->functions) {
888 dev_err(dev, "failed to allocate memory for function list\n");
889 return -EINVAL;
890 }
891
892 info->groups = devm_kzalloc(dev, info->ngroups *
893 sizeof(struct rockchip_pin_group),
894 GFP_KERNEL);
895 if (!info->groups) {
896 dev_err(dev, "failed allocate memory for ping group list\n");
897 return -EINVAL;
898 }
899
900 i = 0;
901
902 for_each_child_of_node(np, child) {
903 if (of_match_node(rockchip_bank_match, child))
904 continue;
905
906 ret = rockchip_pinctrl_parse_functions(child, info, i++);
907 if (ret) {
908 dev_err(&pdev->dev, "failed to parse function\n");
909 return ret;
910 }
911 }
912
913 return 0;
914 }
915
916 static int rockchip_pinctrl_register(struct platform_device *pdev,
917 struct rockchip_pinctrl *info)
918 {
919 struct pinctrl_desc *ctrldesc = &info->pctl;
920 struct pinctrl_pin_desc *pindesc, *pdesc;
921 struct rockchip_pin_bank *pin_bank;
922 int pin, bank, ret;
923 int k;
924
925 ctrldesc->name = "rockchip-pinctrl";
926 ctrldesc->owner = THIS_MODULE;
927 ctrldesc->pctlops = &rockchip_pctrl_ops;
928 ctrldesc->pmxops = &rockchip_pmx_ops;
929 ctrldesc->confops = &rockchip_pinconf_ops;
930
931 pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
932 info->ctrl->nr_pins, GFP_KERNEL);
933 if (!pindesc) {
934 dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
935 return -ENOMEM;
936 }
937 ctrldesc->pins = pindesc;
938 ctrldesc->npins = info->ctrl->nr_pins;
939
940 pdesc = pindesc;
941 for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
942 pin_bank = &info->ctrl->pin_banks[bank];
943 for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
944 pdesc->number = k;
945 pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
946 pin_bank->name, pin);
947 pdesc++;
948 }
949 }
950
951 info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
952 if (!info->pctl_dev) {
953 dev_err(&pdev->dev, "could not register pinctrl driver\n");
954 return -EINVAL;
955 }
956
957 for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
958 pin_bank = &info->ctrl->pin_banks[bank];
959 pin_bank->grange.name = pin_bank->name;
960 pin_bank->grange.id = bank;
961 pin_bank->grange.pin_base = pin_bank->pin_base;
962 pin_bank->grange.base = pin_bank->gpio_chip.base;
963 pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
964 pin_bank->grange.gc = &pin_bank->gpio_chip;
965 pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
966 }
967
968 ret = rockchip_pinctrl_parse_dt(pdev, info);
969 if (ret) {
970 pinctrl_unregister(info->pctl_dev);
971 return ret;
972 }
973
974 return 0;
975 }
976
977 /*
978 * GPIO handling
979 */
980
981 static int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset)
982 {
983 return pinctrl_request_gpio(chip->base + offset);
984 }
985
986 static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset)
987 {
988 pinctrl_free_gpio(chip->base + offset);
989 }
990
991 static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
992 {
993 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
994 void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
995 unsigned long flags;
996 u32 data;
997
998 spin_lock_irqsave(&bank->slock, flags);
999
1000 data = readl(reg);
1001 data &= ~BIT(offset);
1002 if (value)
1003 data |= BIT(offset);
1004 writel(data, reg);
1005
1006 spin_unlock_irqrestore(&bank->slock, flags);
1007 }
1008
1009 /*
1010 * Returns the level of the pin for input direction and setting of the DR
1011 * register for output gpios.
1012 */
1013 static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
1014 {
1015 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1016 u32 data;
1017
1018 data = readl(bank->reg_base + GPIO_EXT_PORT);
1019 data >>= offset;
1020 data &= 1;
1021 return data;
1022 }
1023
1024 /*
1025 * gpiolib gpio_direction_input callback function. The setting of the pin
1026 * mux function as 'gpio input' will be handled by the pinctrl susbsystem
1027 * interface.
1028 */
1029 static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
1030 {
1031 return pinctrl_gpio_direction_input(gc->base + offset);
1032 }
1033
1034 /*
1035 * gpiolib gpio_direction_output callback function. The setting of the pin
1036 * mux function as 'gpio output' will be handled by the pinctrl susbsystem
1037 * interface.
1038 */
1039 static int rockchip_gpio_direction_output(struct gpio_chip *gc,
1040 unsigned offset, int value)
1041 {
1042 rockchip_gpio_set(gc, offset, value);
1043 return pinctrl_gpio_direction_output(gc->base + offset);
1044 }
1045
1046 /*
1047 * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
1048 * and a virtual IRQ, if not already present.
1049 */
1050 static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
1051 {
1052 struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
1053 unsigned int virq;
1054
1055 if (!bank->domain)
1056 return -ENXIO;
1057
1058 virq = irq_create_mapping(bank->domain, offset);
1059
1060 return (virq) ? : -ENXIO;
1061 }
1062
1063 static const struct gpio_chip rockchip_gpiolib_chip = {
1064 .request = rockchip_gpio_request,
1065 .free = rockchip_gpio_free,
1066 .set = rockchip_gpio_set,
1067 .get = rockchip_gpio_get,
1068 .direction_input = rockchip_gpio_direction_input,
1069 .direction_output = rockchip_gpio_direction_output,
1070 .to_irq = rockchip_gpio_to_irq,
1071 .owner = THIS_MODULE,
1072 };
1073
1074 /*
1075 * Interrupt handling
1076 */
1077
1078 static void rockchip_irq_demux(unsigned int irq, struct irq_desc *desc)
1079 {
1080 struct irq_chip *chip = irq_get_chip(irq);
1081 struct rockchip_pin_bank *bank = irq_get_handler_data(irq);
1082 u32 polarity = 0, data = 0;
1083 u32 pend;
1084 bool edge_changed = false;
1085
1086 dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
1087
1088 chained_irq_enter(chip, desc);
1089
1090 pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
1091
1092 if (bank->toggle_edge_mode) {
1093 polarity = readl_relaxed(bank->reg_base +
1094 GPIO_INT_POLARITY);
1095 data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
1096 }
1097
1098 while (pend) {
1099 unsigned int virq;
1100
1101 irq = __ffs(pend);
1102 pend &= ~BIT(irq);
1103 virq = irq_linear_revmap(bank->domain, irq);
1104
1105 if (!virq) {
1106 dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
1107 continue;
1108 }
1109
1110 dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
1111
1112 /*
1113 * Triggering IRQ on both rising and falling edge
1114 * needs manual intervention.
1115 */
1116 if (bank->toggle_edge_mode & BIT(irq)) {
1117 if (data & BIT(irq))
1118 polarity &= ~BIT(irq);
1119 else
1120 polarity |= BIT(irq);
1121
1122 edge_changed = true;
1123 }
1124
1125 generic_handle_irq(virq);
1126 }
1127
1128 if (bank->toggle_edge_mode && edge_changed) {
1129 /* Interrupt params should only be set with ints disabled */
1130 data = readl_relaxed(bank->reg_base + GPIO_INTEN);
1131 writel_relaxed(0, bank->reg_base + GPIO_INTEN);
1132 writel(polarity, bank->reg_base + GPIO_INT_POLARITY);
1133 writel(data, bank->reg_base + GPIO_INTEN);
1134 }
1135
1136 chained_irq_exit(chip, desc);
1137 }
1138
1139 static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
1140 {
1141 struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
1142 struct rockchip_pin_bank *bank = gc->private;
1143 u32 mask = BIT(d->hwirq);
1144 u32 polarity;
1145 u32 level;
1146 u32 data;
1147
1148 /* make sure the pin is configured as gpio input */
1149 rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
1150 data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
1151 data &= ~mask;
1152 writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
1153
1154 if (type & IRQ_TYPE_EDGE_BOTH)
1155 __irq_set_handler_locked(d->irq, handle_edge_irq);
1156 else
1157 __irq_set_handler_locked(d->irq, handle_level_irq);
1158
1159 irq_gc_lock(gc);
1160
1161 level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
1162 polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
1163
1164 switch (type) {
1165 case IRQ_TYPE_EDGE_BOTH:
1166 bank->toggle_edge_mode |= mask;
1167 level |= mask;
1168
1169 /*
1170 * Determine gpio state. If 1 next interrupt should be falling
1171 * otherwise rising.
1172 */
1173 data = readl(bank->reg_base + GPIO_EXT_PORT);
1174 if (data & mask)
1175 polarity &= ~mask;
1176 else
1177 polarity |= mask;
1178 break;
1179 case IRQ_TYPE_EDGE_RISING:
1180 bank->toggle_edge_mode &= ~mask;
1181 level |= mask;
1182 polarity |= mask;
1183 break;
1184 case IRQ_TYPE_EDGE_FALLING:
1185 bank->toggle_edge_mode &= ~mask;
1186 level |= mask;
1187 polarity &= ~mask;
1188 break;
1189 case IRQ_TYPE_LEVEL_HIGH:
1190 bank->toggle_edge_mode &= ~mask;
1191 level &= ~mask;
1192 polarity |= mask;
1193 break;
1194 case IRQ_TYPE_LEVEL_LOW:
1195 bank->toggle_edge_mode &= ~mask;
1196 level &= ~mask;
1197 polarity &= ~mask;
1198 break;
1199 default:
1200 irq_gc_unlock(gc);
1201 return -EINVAL;
1202 }
1203
1204 writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
1205 writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
1206
1207 irq_gc_unlock(gc);
1208
1209 return 0;
1210 }
1211
1212 static int rockchip_interrupts_register(struct platform_device *pdev,
1213 struct rockchip_pinctrl *info)
1214 {
1215 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1216 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1217 unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
1218 struct irq_chip_generic *gc;
1219 int ret;
1220 int i;
1221
1222 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1223 if (!bank->valid) {
1224 dev_warn(&pdev->dev, "bank %s is not valid\n",
1225 bank->name);
1226 continue;
1227 }
1228
1229 bank->domain = irq_domain_add_linear(bank->of_node, 32,
1230 &irq_generic_chip_ops, NULL);
1231 if (!bank->domain) {
1232 dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
1233 bank->name);
1234 continue;
1235 }
1236
1237 ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
1238 "rockchip_gpio_irq", handle_level_irq,
1239 clr, 0, IRQ_GC_INIT_MASK_CACHE);
1240 if (ret) {
1241 dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
1242 bank->name);
1243 irq_domain_remove(bank->domain);
1244 continue;
1245 }
1246
1247 gc = irq_get_domain_generic_chip(bank->domain, 0);
1248 gc->reg_base = bank->reg_base;
1249 gc->private = bank;
1250 gc->chip_types[0].regs.mask = GPIO_INTEN;
1251 gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
1252 gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
1253 gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
1254 gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
1255 gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
1256 gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
1257
1258 irq_set_handler_data(bank->irq, bank);
1259 irq_set_chained_handler(bank->irq, rockchip_irq_demux);
1260 }
1261
1262 return 0;
1263 }
1264
1265 static int rockchip_gpiolib_register(struct platform_device *pdev,
1266 struct rockchip_pinctrl *info)
1267 {
1268 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1269 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1270 struct gpio_chip *gc;
1271 int ret;
1272 int i;
1273
1274 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1275 if (!bank->valid) {
1276 dev_warn(&pdev->dev, "bank %s is not valid\n",
1277 bank->name);
1278 continue;
1279 }
1280
1281 bank->gpio_chip = rockchip_gpiolib_chip;
1282
1283 gc = &bank->gpio_chip;
1284 gc->base = bank->pin_base;
1285 gc->ngpio = bank->nr_pins;
1286 gc->dev = &pdev->dev;
1287 gc->of_node = bank->of_node;
1288 gc->label = bank->name;
1289
1290 ret = gpiochip_add(gc);
1291 if (ret) {
1292 dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
1293 gc->label, ret);
1294 goto fail;
1295 }
1296 }
1297
1298 rockchip_interrupts_register(pdev, info);
1299
1300 return 0;
1301
1302 fail:
1303 for (--i, --bank; i >= 0; --i, --bank) {
1304 if (!bank->valid)
1305 continue;
1306
1307 if (gpiochip_remove(&bank->gpio_chip))
1308 dev_err(&pdev->dev, "gpio chip %s remove failed\n",
1309 bank->gpio_chip.label);
1310 }
1311 return ret;
1312 }
1313
1314 static int rockchip_gpiolib_unregister(struct platform_device *pdev,
1315 struct rockchip_pinctrl *info)
1316 {
1317 struct rockchip_pin_ctrl *ctrl = info->ctrl;
1318 struct rockchip_pin_bank *bank = ctrl->pin_banks;
1319 int ret = 0;
1320 int i;
1321
1322 for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank) {
1323 if (!bank->valid)
1324 continue;
1325
1326 ret = gpiochip_remove(&bank->gpio_chip);
1327 }
1328
1329 if (ret)
1330 dev_err(&pdev->dev, "gpio chip remove failed\n");
1331
1332 return ret;
1333 }
1334
1335 static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
1336 struct device *dev)
1337 {
1338 struct resource res;
1339
1340 if (of_address_to_resource(bank->of_node, 0, &res)) {
1341 dev_err(dev, "cannot find IO resource for bank\n");
1342 return -ENOENT;
1343 }
1344
1345 bank->reg_base = devm_ioremap_resource(dev, &res);
1346 if (IS_ERR(bank->reg_base))
1347 return PTR_ERR(bank->reg_base);
1348
1349 /*
1350 * special case, where parts of the pull setting-registers are
1351 * part of the PMU register space
1352 */
1353 if (of_device_is_compatible(bank->of_node,
1354 "rockchip,rk3188-gpio-bank0")) {
1355 bank->bank_type = RK3188_BANK0;
1356
1357 if (of_address_to_resource(bank->of_node, 1, &res)) {
1358 dev_err(dev, "cannot find IO resource for bank\n");
1359 return -ENOENT;
1360 }
1361
1362 bank->reg_pull = devm_ioremap_resource(dev, &res);
1363 if (IS_ERR(bank->reg_pull))
1364 return PTR_ERR(bank->reg_pull);
1365 } else {
1366 bank->bank_type = COMMON_BANK;
1367 }
1368
1369 bank->irq = irq_of_parse_and_map(bank->of_node, 0);
1370
1371 bank->clk = of_clk_get(bank->of_node, 0);
1372 if (IS_ERR(bank->clk))
1373 return PTR_ERR(bank->clk);
1374
1375 return clk_prepare_enable(bank->clk);
1376 }
1377
1378 static const struct of_device_id rockchip_pinctrl_dt_match[];
1379
1380 /* retrieve the soc specific data */
1381 static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
1382 struct rockchip_pinctrl *d,
1383 struct platform_device *pdev)
1384 {
1385 const struct of_device_id *match;
1386 struct device_node *node = pdev->dev.of_node;
1387 struct device_node *np;
1388 struct rockchip_pin_ctrl *ctrl;
1389 struct rockchip_pin_bank *bank;
1390 int i;
1391
1392 match = of_match_node(rockchip_pinctrl_dt_match, node);
1393 ctrl = (struct rockchip_pin_ctrl *)match->data;
1394
1395 for_each_child_of_node(node, np) {
1396 if (!of_find_property(np, "gpio-controller", NULL))
1397 continue;
1398
1399 bank = ctrl->pin_banks;
1400 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1401 if (!strcmp(bank->name, np->name)) {
1402 bank->of_node = np;
1403
1404 if (!rockchip_get_bank_data(bank, &pdev->dev))
1405 bank->valid = true;
1406
1407 break;
1408 }
1409 }
1410 }
1411
1412 bank = ctrl->pin_banks;
1413 for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
1414 spin_lock_init(&bank->slock);
1415 bank->drvdata = d;
1416 bank->pin_base = ctrl->nr_pins;
1417 ctrl->nr_pins += bank->nr_pins;
1418 }
1419
1420 return ctrl;
1421 }
1422
1423 static int rockchip_pinctrl_probe(struct platform_device *pdev)
1424 {
1425 struct rockchip_pinctrl *info;
1426 struct device *dev = &pdev->dev;
1427 struct rockchip_pin_ctrl *ctrl;
1428 struct resource *res;
1429 int ret;
1430
1431 if (!dev->of_node) {
1432 dev_err(dev, "device tree node not found\n");
1433 return -ENODEV;
1434 }
1435
1436 info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
1437 if (!info)
1438 return -ENOMEM;
1439
1440 ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
1441 if (!ctrl) {
1442 dev_err(dev, "driver data not available\n");
1443 return -EINVAL;
1444 }
1445 info->ctrl = ctrl;
1446 info->dev = dev;
1447
1448 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1449 info->reg_base = devm_ioremap_resource(&pdev->dev, res);
1450 if (IS_ERR(info->reg_base))
1451 return PTR_ERR(info->reg_base);
1452
1453 /* The RK3188 has its pull registers in a separate place */
1454 if (ctrl->type == RK3188) {
1455 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1456 info->reg_pull = devm_ioremap_resource(&pdev->dev, res);
1457 if (IS_ERR(info->reg_pull))
1458 return PTR_ERR(info->reg_pull);
1459 }
1460
1461 ret = rockchip_gpiolib_register(pdev, info);
1462 if (ret)
1463 return ret;
1464
1465 ret = rockchip_pinctrl_register(pdev, info);
1466 if (ret) {
1467 rockchip_gpiolib_unregister(pdev, info);
1468 return ret;
1469 }
1470
1471 platform_set_drvdata(pdev, info);
1472
1473 return 0;
1474 }
1475
1476 static struct rockchip_pin_bank rk2928_pin_banks[] = {
1477 PIN_BANK(0, 32, "gpio0"),
1478 PIN_BANK(1, 32, "gpio1"),
1479 PIN_BANK(2, 32, "gpio2"),
1480 PIN_BANK(3, 32, "gpio3"),
1481 };
1482
1483 static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
1484 .pin_banks = rk2928_pin_banks,
1485 .nr_banks = ARRAY_SIZE(rk2928_pin_banks),
1486 .label = "RK2928-GPIO",
1487 .type = RK2928,
1488 .mux_offset = 0xa8,
1489 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
1490 };
1491
1492 static struct rockchip_pin_bank rk3066a_pin_banks[] = {
1493 PIN_BANK(0, 32, "gpio0"),
1494 PIN_BANK(1, 32, "gpio1"),
1495 PIN_BANK(2, 32, "gpio2"),
1496 PIN_BANK(3, 32, "gpio3"),
1497 PIN_BANK(4, 32, "gpio4"),
1498 PIN_BANK(6, 16, "gpio6"),
1499 };
1500
1501 static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
1502 .pin_banks = rk3066a_pin_banks,
1503 .nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
1504 .label = "RK3066a-GPIO",
1505 .type = RK2928,
1506 .mux_offset = 0xa8,
1507 .pull_calc_reg = rk2928_calc_pull_reg_and_bit,
1508 };
1509
1510 static struct rockchip_pin_bank rk3066b_pin_banks[] = {
1511 PIN_BANK(0, 32, "gpio0"),
1512 PIN_BANK(1, 32, "gpio1"),
1513 PIN_BANK(2, 32, "gpio2"),
1514 PIN_BANK(3, 32, "gpio3"),
1515 };
1516
1517 static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
1518 .pin_banks = rk3066b_pin_banks,
1519 .nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
1520 .label = "RK3066b-GPIO",
1521 .type = RK3066B,
1522 .mux_offset = 0x60,
1523 };
1524
1525 static struct rockchip_pin_bank rk3188_pin_banks[] = {
1526 PIN_BANK(0, 32, "gpio0"),
1527 PIN_BANK(1, 32, "gpio1"),
1528 PIN_BANK(2, 32, "gpio2"),
1529 PIN_BANK(3, 32, "gpio3"),
1530 };
1531
1532 static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
1533 .pin_banks = rk3188_pin_banks,
1534 .nr_banks = ARRAY_SIZE(rk3188_pin_banks),
1535 .label = "RK3188-GPIO",
1536 .type = RK3188,
1537 .mux_offset = 0x68,
1538 .pull_calc_reg = rk3188_calc_pull_reg_and_bit,
1539 };
1540
1541 static const struct of_device_id rockchip_pinctrl_dt_match[] = {
1542 { .compatible = "rockchip,rk2928-pinctrl",
1543 .data = (void *)&rk2928_pin_ctrl },
1544 { .compatible = "rockchip,rk3066a-pinctrl",
1545 .data = (void *)&rk3066a_pin_ctrl },
1546 { .compatible = "rockchip,rk3066b-pinctrl",
1547 .data = (void *)&rk3066b_pin_ctrl },
1548 { .compatible = "rockchip,rk3188-pinctrl",
1549 .data = (void *)&rk3188_pin_ctrl },
1550 {},
1551 };
1552 MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
1553
1554 static struct platform_driver rockchip_pinctrl_driver = {
1555 .probe = rockchip_pinctrl_probe,
1556 .driver = {
1557 .name = "rockchip-pinctrl",
1558 .owner = THIS_MODULE,
1559 .of_match_table = rockchip_pinctrl_dt_match,
1560 },
1561 };
1562
1563 static int __init rockchip_pinctrl_drv_register(void)
1564 {
1565 return platform_driver_register(&rockchip_pinctrl_driver);
1566 }
1567 postcore_initcall(rockchip_pinctrl_drv_register);
1568
1569 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
1570 MODULE_DESCRIPTION("Rockchip pinctrl driver");
1571 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support