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Merge branch 'work.sendmsg' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-artful-kernel.git] / drivers / pinctrl / pinctrl-amd.c
1 /*
2 * GPIO driver for AMD
3 *
4 * Copyright (c) 2014,2015 AMD Corporation.
5 * Authors: Ken Xue <Ken.Xue@amd.com>
6 * Wu, Jeff <Jeff.Wu@amd.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
11 */
12
13 #include <linux/err.h>
14 #include <linux/bug.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/spinlock.h>
18 #include <linux/compiler.h>
19 #include <linux/types.h>
20 #include <linux/errno.h>
21 #include <linux/log2.h>
22 #include <linux/io.h>
23 #include <linux/gpio.h>
24 #include <linux/slab.h>
25 #include <linux/platform_device.h>
26 #include <linux/mutex.h>
27 #include <linux/acpi.h>
28 #include <linux/seq_file.h>
29 #include <linux/interrupt.h>
30 #include <linux/list.h>
31 #include <linux/bitops.h>
32 #include <linux/pinctrl/pinconf.h>
33 #include <linux/pinctrl/pinconf-generic.h>
34
35 #include "pinctrl-utils.h"
36 #include "pinctrl-amd.h"
37
38 static int amd_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
39 {
40 unsigned long flags;
41 u32 pin_reg;
42 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
43
44 spin_lock_irqsave(&gpio_dev->lock, flags);
45 pin_reg = readl(gpio_dev->base + offset * 4);
46 pin_reg &= ~BIT(OUTPUT_ENABLE_OFF);
47 writel(pin_reg, gpio_dev->base + offset * 4);
48 spin_unlock_irqrestore(&gpio_dev->lock, flags);
49
50 return 0;
51 }
52
53 static int amd_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
54 int value)
55 {
56 u32 pin_reg;
57 unsigned long flags;
58 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
59
60 spin_lock_irqsave(&gpio_dev->lock, flags);
61 pin_reg = readl(gpio_dev->base + offset * 4);
62 pin_reg |= BIT(OUTPUT_ENABLE_OFF);
63 if (value)
64 pin_reg |= BIT(OUTPUT_VALUE_OFF);
65 else
66 pin_reg &= ~BIT(OUTPUT_VALUE_OFF);
67 writel(pin_reg, gpio_dev->base + offset * 4);
68 spin_unlock_irqrestore(&gpio_dev->lock, flags);
69
70 return 0;
71 }
72
73 static int amd_gpio_get_value(struct gpio_chip *gc, unsigned offset)
74 {
75 u32 pin_reg;
76 unsigned long flags;
77 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
78
79 spin_lock_irqsave(&gpio_dev->lock, flags);
80 pin_reg = readl(gpio_dev->base + offset * 4);
81 spin_unlock_irqrestore(&gpio_dev->lock, flags);
82
83 return !!(pin_reg & BIT(PIN_STS_OFF));
84 }
85
86 static void amd_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value)
87 {
88 u32 pin_reg;
89 unsigned long flags;
90 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
91
92 spin_lock_irqsave(&gpio_dev->lock, flags);
93 pin_reg = readl(gpio_dev->base + offset * 4);
94 if (value)
95 pin_reg |= BIT(OUTPUT_VALUE_OFF);
96 else
97 pin_reg &= ~BIT(OUTPUT_VALUE_OFF);
98 writel(pin_reg, gpio_dev->base + offset * 4);
99 spin_unlock_irqrestore(&gpio_dev->lock, flags);
100 }
101
102 static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset,
103 unsigned debounce)
104 {
105 u32 time;
106 u32 pin_reg;
107 int ret = 0;
108 unsigned long flags;
109 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
110
111 spin_lock_irqsave(&gpio_dev->lock, flags);
112 pin_reg = readl(gpio_dev->base + offset * 4);
113
114 if (debounce) {
115 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
116 pin_reg &= ~DB_TMR_OUT_MASK;
117 /*
118 Debounce Debounce Timer Max
119 TmrLarge TmrOutUnit Unit Debounce
120 Time
121 0 0 61 usec (2 RtcClk) 976 usec
122 0 1 244 usec (8 RtcClk) 3.9 msec
123 1 0 15.6 msec (512 RtcClk) 250 msec
124 1 1 62.5 msec (2048 RtcClk) 1 sec
125 */
126
127 if (debounce < 61) {
128 pin_reg |= 1;
129 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
130 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
131 } else if (debounce < 976) {
132 time = debounce / 61;
133 pin_reg |= time & DB_TMR_OUT_MASK;
134 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
135 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
136 } else if (debounce < 3900) {
137 time = debounce / 244;
138 pin_reg |= time & DB_TMR_OUT_MASK;
139 pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
140 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
141 } else if (debounce < 250000) {
142 time = debounce / 15600;
143 pin_reg |= time & DB_TMR_OUT_MASK;
144 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
145 pin_reg |= BIT(DB_TMR_LARGE_OFF);
146 } else if (debounce < 1000000) {
147 time = debounce / 62500;
148 pin_reg |= time & DB_TMR_OUT_MASK;
149 pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
150 pin_reg |= BIT(DB_TMR_LARGE_OFF);
151 } else {
152 pin_reg &= ~DB_CNTRl_MASK;
153 ret = -EINVAL;
154 }
155 } else {
156 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
157 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
158 pin_reg &= ~DB_TMR_OUT_MASK;
159 pin_reg &= ~DB_CNTRl_MASK;
160 }
161 writel(pin_reg, gpio_dev->base + offset * 4);
162 spin_unlock_irqrestore(&gpio_dev->lock, flags);
163
164 return ret;
165 }
166
167 static int amd_gpio_set_config(struct gpio_chip *gc, unsigned offset,
168 unsigned long config)
169 {
170 u32 debounce;
171
172 if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
173 return -ENOTSUPP;
174
175 debounce = pinconf_to_config_argument(config);
176 return amd_gpio_set_debounce(gc, offset, debounce);
177 }
178
179 #ifdef CONFIG_DEBUG_FS
180 static void amd_gpio_dbg_show(struct seq_file *s, struct gpio_chip *gc)
181 {
182 u32 pin_reg;
183 unsigned long flags;
184 unsigned int bank, i, pin_num;
185 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
186
187 char *level_trig;
188 char *active_level;
189 char *interrupt_enable;
190 char *interrupt_mask;
191 char *wake_cntrl0;
192 char *wake_cntrl1;
193 char *wake_cntrl2;
194 char *pin_sts;
195 char *pull_up_sel;
196 char *pull_up_enable;
197 char *pull_down_enable;
198 char *output_value;
199 char *output_enable;
200
201 for (bank = 0; bank < gpio_dev->hwbank_num; bank++) {
202 seq_printf(s, "GPIO bank%d\t", bank);
203
204 switch (bank) {
205 case 0:
206 i = 0;
207 pin_num = AMD_GPIO_PINS_BANK0;
208 break;
209 case 1:
210 i = 64;
211 pin_num = AMD_GPIO_PINS_BANK1 + i;
212 break;
213 case 2:
214 i = 128;
215 pin_num = AMD_GPIO_PINS_BANK2 + i;
216 break;
217 case 3:
218 i = 192;
219 pin_num = AMD_GPIO_PINS_BANK3 + i;
220 break;
221 default:
222 /* Illegal bank number, ignore */
223 continue;
224 }
225 for (; i < pin_num; i++) {
226 seq_printf(s, "pin%d\t", i);
227 spin_lock_irqsave(&gpio_dev->lock, flags);
228 pin_reg = readl(gpio_dev->base + i * 4);
229 spin_unlock_irqrestore(&gpio_dev->lock, flags);
230
231 if (pin_reg & BIT(INTERRUPT_ENABLE_OFF)) {
232 interrupt_enable = "interrupt is enabled|";
233
234 if (!(pin_reg & BIT(ACTIVE_LEVEL_OFF)) &&
235 !(pin_reg & BIT(ACTIVE_LEVEL_OFF + 1)))
236 active_level = "Active low|";
237 else if (pin_reg & BIT(ACTIVE_LEVEL_OFF) &&
238 !(pin_reg & BIT(ACTIVE_LEVEL_OFF + 1)))
239 active_level = "Active high|";
240 else if (!(pin_reg & BIT(ACTIVE_LEVEL_OFF)) &&
241 pin_reg & BIT(ACTIVE_LEVEL_OFF + 1))
242 active_level = "Active on both|";
243 else
244 active_level = "Unknow Active level|";
245
246 if (pin_reg & BIT(LEVEL_TRIG_OFF))
247 level_trig = "Level trigger|";
248 else
249 level_trig = "Edge trigger|";
250
251 } else {
252 interrupt_enable =
253 "interrupt is disabled|";
254 active_level = " ";
255 level_trig = " ";
256 }
257
258 if (pin_reg & BIT(INTERRUPT_MASK_OFF))
259 interrupt_mask =
260 "interrupt is unmasked|";
261 else
262 interrupt_mask =
263 "interrupt is masked|";
264
265 if (pin_reg & BIT(WAKE_CNTRL_OFF_S0I3))
266 wake_cntrl0 = "enable wakeup in S0i3 state|";
267 else
268 wake_cntrl0 = "disable wakeup in S0i3 state|";
269
270 if (pin_reg & BIT(WAKE_CNTRL_OFF_S3))
271 wake_cntrl1 = "enable wakeup in S3 state|";
272 else
273 wake_cntrl1 = "disable wakeup in S3 state|";
274
275 if (pin_reg & BIT(WAKE_CNTRL_OFF_S4))
276 wake_cntrl2 = "enable wakeup in S4/S5 state|";
277 else
278 wake_cntrl2 = "disable wakeup in S4/S5 state|";
279
280 if (pin_reg & BIT(PULL_UP_ENABLE_OFF)) {
281 pull_up_enable = "pull-up is enabled|";
282 if (pin_reg & BIT(PULL_UP_SEL_OFF))
283 pull_up_sel = "8k pull-up|";
284 else
285 pull_up_sel = "4k pull-up|";
286 } else {
287 pull_up_enable = "pull-up is disabled|";
288 pull_up_sel = " ";
289 }
290
291 if (pin_reg & BIT(PULL_DOWN_ENABLE_OFF))
292 pull_down_enable = "pull-down is enabled|";
293 else
294 pull_down_enable = "Pull-down is disabled|";
295
296 if (pin_reg & BIT(OUTPUT_ENABLE_OFF)) {
297 pin_sts = " ";
298 output_enable = "output is enabled|";
299 if (pin_reg & BIT(OUTPUT_VALUE_OFF))
300 output_value = "output is high|";
301 else
302 output_value = "output is low|";
303 } else {
304 output_enable = "output is disabled|";
305 output_value = " ";
306
307 if (pin_reg & BIT(PIN_STS_OFF))
308 pin_sts = "input is high|";
309 else
310 pin_sts = "input is low|";
311 }
312
313 seq_printf(s, "%s %s %s %s %s %s\n"
314 " %s %s %s %s %s %s %s 0x%x\n",
315 level_trig, active_level, interrupt_enable,
316 interrupt_mask, wake_cntrl0, wake_cntrl1,
317 wake_cntrl2, pin_sts, pull_up_sel,
318 pull_up_enable, pull_down_enable,
319 output_value, output_enable, pin_reg);
320 }
321 }
322 }
323 #else
324 #define amd_gpio_dbg_show NULL
325 #endif
326
327 static void amd_gpio_irq_enable(struct irq_data *d)
328 {
329 u32 pin_reg;
330 unsigned long flags;
331 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
332 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
333
334 spin_lock_irqsave(&gpio_dev->lock, flags);
335 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
336 pin_reg |= BIT(INTERRUPT_ENABLE_OFF);
337 pin_reg |= BIT(INTERRUPT_MASK_OFF);
338 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
339 spin_unlock_irqrestore(&gpio_dev->lock, flags);
340 }
341
342 static void amd_gpio_irq_disable(struct irq_data *d)
343 {
344 u32 pin_reg;
345 unsigned long flags;
346 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
347 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
348
349 spin_lock_irqsave(&gpio_dev->lock, flags);
350 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
351 pin_reg &= ~BIT(INTERRUPT_ENABLE_OFF);
352 pin_reg &= ~BIT(INTERRUPT_MASK_OFF);
353 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
354 spin_unlock_irqrestore(&gpio_dev->lock, flags);
355 }
356
357 static void amd_gpio_irq_mask(struct irq_data *d)
358 {
359 u32 pin_reg;
360 unsigned long flags;
361 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
362 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
363
364 spin_lock_irqsave(&gpio_dev->lock, flags);
365 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
366 pin_reg &= ~BIT(INTERRUPT_MASK_OFF);
367 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
368 spin_unlock_irqrestore(&gpio_dev->lock, flags);
369 }
370
371 static void amd_gpio_irq_unmask(struct irq_data *d)
372 {
373 u32 pin_reg;
374 unsigned long flags;
375 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
376 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
377
378 spin_lock_irqsave(&gpio_dev->lock, flags);
379 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
380 pin_reg |= BIT(INTERRUPT_MASK_OFF);
381 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
382 spin_unlock_irqrestore(&gpio_dev->lock, flags);
383 }
384
385 static void amd_gpio_irq_eoi(struct irq_data *d)
386 {
387 u32 reg;
388 unsigned long flags;
389 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
390 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
391
392 spin_lock_irqsave(&gpio_dev->lock, flags);
393 reg = readl(gpio_dev->base + WAKE_INT_MASTER_REG);
394 reg |= EOI_MASK;
395 writel(reg, gpio_dev->base + WAKE_INT_MASTER_REG);
396 spin_unlock_irqrestore(&gpio_dev->lock, flags);
397 }
398
399 static int amd_gpio_irq_set_type(struct irq_data *d, unsigned int type)
400 {
401 int ret = 0;
402 u32 pin_reg;
403 unsigned long flags, irq_flags;
404 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
405 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
406
407 spin_lock_irqsave(&gpio_dev->lock, flags);
408 pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
409
410 /* Ignore the settings coming from the client and
411 * read the values from the ACPI tables
412 * while setting the trigger type
413 */
414
415 irq_flags = irq_get_trigger_type(d->irq);
416 if (irq_flags != IRQ_TYPE_NONE)
417 type = irq_flags;
418
419 switch (type & IRQ_TYPE_SENSE_MASK) {
420 case IRQ_TYPE_EDGE_RISING:
421 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
422 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
423 pin_reg |= ACTIVE_HIGH << ACTIVE_LEVEL_OFF;
424 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
425 irq_set_handler_locked(d, handle_edge_irq);
426 break;
427
428 case IRQ_TYPE_EDGE_FALLING:
429 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
430 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
431 pin_reg |= ACTIVE_LOW << ACTIVE_LEVEL_OFF;
432 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
433 irq_set_handler_locked(d, handle_edge_irq);
434 break;
435
436 case IRQ_TYPE_EDGE_BOTH:
437 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
438 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
439 pin_reg |= BOTH_EADGE << ACTIVE_LEVEL_OFF;
440 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
441 irq_set_handler_locked(d, handle_edge_irq);
442 break;
443
444 case IRQ_TYPE_LEVEL_HIGH:
445 pin_reg |= LEVEL_TRIGGER << LEVEL_TRIG_OFF;
446 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
447 pin_reg |= ACTIVE_HIGH << ACTIVE_LEVEL_OFF;
448 pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
449 pin_reg |= DB_TYPE_PRESERVE_LOW_GLITCH << DB_CNTRL_OFF;
450 irq_set_handler_locked(d, handle_level_irq);
451 break;
452
453 case IRQ_TYPE_LEVEL_LOW:
454 pin_reg |= LEVEL_TRIGGER << LEVEL_TRIG_OFF;
455 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
456 pin_reg |= ACTIVE_LOW << ACTIVE_LEVEL_OFF;
457 pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
458 pin_reg |= DB_TYPE_PRESERVE_HIGH_GLITCH << DB_CNTRL_OFF;
459 irq_set_handler_locked(d, handle_level_irq);
460 break;
461
462 case IRQ_TYPE_NONE:
463 break;
464
465 default:
466 dev_err(&gpio_dev->pdev->dev, "Invalid type value\n");
467 ret = -EINVAL;
468 }
469
470 pin_reg |= CLR_INTR_STAT << INTERRUPT_STS_OFF;
471 writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
472 spin_unlock_irqrestore(&gpio_dev->lock, flags);
473
474 return ret;
475 }
476
477 static void amd_irq_ack(struct irq_data *d)
478 {
479 /*
480 * based on HW design,there is no need to ack HW
481 * before handle current irq. But this routine is
482 * necessary for handle_edge_irq
483 */
484 }
485
486 static struct irq_chip amd_gpio_irqchip = {
487 .name = "amd_gpio",
488 .irq_ack = amd_irq_ack,
489 .irq_enable = amd_gpio_irq_enable,
490 .irq_disable = amd_gpio_irq_disable,
491 .irq_mask = amd_gpio_irq_mask,
492 .irq_unmask = amd_gpio_irq_unmask,
493 .irq_eoi = amd_gpio_irq_eoi,
494 .irq_set_type = amd_gpio_irq_set_type,
495 .flags = IRQCHIP_SKIP_SET_WAKE,
496 };
497
498 static void amd_gpio_irq_handler(struct irq_desc *desc)
499 {
500 u32 i;
501 u32 off;
502 u32 reg;
503 u32 pin_reg;
504 u64 reg64;
505 int handled = 0;
506 unsigned int irq;
507 unsigned long flags;
508 struct irq_chip *chip = irq_desc_get_chip(desc);
509 struct gpio_chip *gc = irq_desc_get_handler_data(desc);
510 struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
511
512 chained_irq_enter(chip, desc);
513 /*enable GPIO interrupt again*/
514 spin_lock_irqsave(&gpio_dev->lock, flags);
515 reg = readl(gpio_dev->base + WAKE_INT_STATUS_REG1);
516 reg64 = reg;
517 reg64 = reg64 << 32;
518
519 reg = readl(gpio_dev->base + WAKE_INT_STATUS_REG0);
520 reg64 |= reg;
521 spin_unlock_irqrestore(&gpio_dev->lock, flags);
522
523 /*
524 * first 46 bits indicates interrupt status.
525 * one bit represents four interrupt sources.
526 */
527 for (off = 0; off < 46 ; off++) {
528 if (reg64 & BIT(off)) {
529 for (i = 0; i < 4; i++) {
530 pin_reg = readl(gpio_dev->base +
531 (off * 4 + i) * 4);
532 if ((pin_reg & BIT(INTERRUPT_STS_OFF)) ||
533 (pin_reg & BIT(WAKE_STS_OFF))) {
534 irq = irq_find_mapping(gc->irqdomain,
535 off * 4 + i);
536 generic_handle_irq(irq);
537 writel(pin_reg,
538 gpio_dev->base
539 + (off * 4 + i) * 4);
540 handled++;
541 }
542 }
543 }
544 }
545
546 if (handled == 0)
547 handle_bad_irq(desc);
548
549 spin_lock_irqsave(&gpio_dev->lock, flags);
550 reg = readl(gpio_dev->base + WAKE_INT_MASTER_REG);
551 reg |= EOI_MASK;
552 writel(reg, gpio_dev->base + WAKE_INT_MASTER_REG);
553 spin_unlock_irqrestore(&gpio_dev->lock, flags);
554
555 chained_irq_exit(chip, desc);
556 }
557
558 static int amd_get_groups_count(struct pinctrl_dev *pctldev)
559 {
560 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
561
562 return gpio_dev->ngroups;
563 }
564
565 static const char *amd_get_group_name(struct pinctrl_dev *pctldev,
566 unsigned group)
567 {
568 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
569
570 return gpio_dev->groups[group].name;
571 }
572
573 static int amd_get_group_pins(struct pinctrl_dev *pctldev,
574 unsigned group,
575 const unsigned **pins,
576 unsigned *num_pins)
577 {
578 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
579
580 *pins = gpio_dev->groups[group].pins;
581 *num_pins = gpio_dev->groups[group].npins;
582 return 0;
583 }
584
585 static const struct pinctrl_ops amd_pinctrl_ops = {
586 .get_groups_count = amd_get_groups_count,
587 .get_group_name = amd_get_group_name,
588 .get_group_pins = amd_get_group_pins,
589 #ifdef CONFIG_OF
590 .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
591 .dt_free_map = pinctrl_utils_free_map,
592 #endif
593 };
594
595 static int amd_pinconf_get(struct pinctrl_dev *pctldev,
596 unsigned int pin,
597 unsigned long *config)
598 {
599 u32 pin_reg;
600 unsigned arg;
601 unsigned long flags;
602 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
603 enum pin_config_param param = pinconf_to_config_param(*config);
604
605 spin_lock_irqsave(&gpio_dev->lock, flags);
606 pin_reg = readl(gpio_dev->base + pin*4);
607 spin_unlock_irqrestore(&gpio_dev->lock, flags);
608 switch (param) {
609 case PIN_CONFIG_INPUT_DEBOUNCE:
610 arg = pin_reg & DB_TMR_OUT_MASK;
611 break;
612
613 case PIN_CONFIG_BIAS_PULL_DOWN:
614 arg = (pin_reg >> PULL_DOWN_ENABLE_OFF) & BIT(0);
615 break;
616
617 case PIN_CONFIG_BIAS_PULL_UP:
618 arg = (pin_reg >> PULL_UP_SEL_OFF) & (BIT(0) | BIT(1));
619 break;
620
621 case PIN_CONFIG_DRIVE_STRENGTH:
622 arg = (pin_reg >> DRV_STRENGTH_SEL_OFF) & DRV_STRENGTH_SEL_MASK;
623 break;
624
625 default:
626 dev_err(&gpio_dev->pdev->dev, "Invalid config param %04x\n",
627 param);
628 return -ENOTSUPP;
629 }
630
631 *config = pinconf_to_config_packed(param, arg);
632
633 return 0;
634 }
635
636 static int amd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
637 unsigned long *configs, unsigned num_configs)
638 {
639 int i;
640 u32 arg;
641 int ret = 0;
642 u32 pin_reg;
643 unsigned long flags;
644 enum pin_config_param param;
645 struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
646
647 spin_lock_irqsave(&gpio_dev->lock, flags);
648 for (i = 0; i < num_configs; i++) {
649 param = pinconf_to_config_param(configs[i]);
650 arg = pinconf_to_config_argument(configs[i]);
651 pin_reg = readl(gpio_dev->base + pin*4);
652
653 switch (param) {
654 case PIN_CONFIG_INPUT_DEBOUNCE:
655 pin_reg &= ~DB_TMR_OUT_MASK;
656 pin_reg |= arg & DB_TMR_OUT_MASK;
657 break;
658
659 case PIN_CONFIG_BIAS_PULL_DOWN:
660 pin_reg &= ~BIT(PULL_DOWN_ENABLE_OFF);
661 pin_reg |= (arg & BIT(0)) << PULL_DOWN_ENABLE_OFF;
662 break;
663
664 case PIN_CONFIG_BIAS_PULL_UP:
665 pin_reg &= ~BIT(PULL_UP_SEL_OFF);
666 pin_reg |= (arg & BIT(0)) << PULL_UP_SEL_OFF;
667 pin_reg &= ~BIT(PULL_UP_ENABLE_OFF);
668 pin_reg |= ((arg>>1) & BIT(0)) << PULL_UP_ENABLE_OFF;
669 break;
670
671 case PIN_CONFIG_DRIVE_STRENGTH:
672 pin_reg &= ~(DRV_STRENGTH_SEL_MASK
673 << DRV_STRENGTH_SEL_OFF);
674 pin_reg |= (arg & DRV_STRENGTH_SEL_MASK)
675 << DRV_STRENGTH_SEL_OFF;
676 break;
677
678 default:
679 dev_err(&gpio_dev->pdev->dev,
680 "Invalid config param %04x\n", param);
681 ret = -ENOTSUPP;
682 }
683
684 writel(pin_reg, gpio_dev->base + pin*4);
685 }
686 spin_unlock_irqrestore(&gpio_dev->lock, flags);
687
688 return ret;
689 }
690
691 static int amd_pinconf_group_get(struct pinctrl_dev *pctldev,
692 unsigned int group,
693 unsigned long *config)
694 {
695 const unsigned *pins;
696 unsigned npins;
697 int ret;
698
699 ret = amd_get_group_pins(pctldev, group, &pins, &npins);
700 if (ret)
701 return ret;
702
703 if (amd_pinconf_get(pctldev, pins[0], config))
704 return -ENOTSUPP;
705
706 return 0;
707 }
708
709 static int amd_pinconf_group_set(struct pinctrl_dev *pctldev,
710 unsigned group, unsigned long *configs,
711 unsigned num_configs)
712 {
713 const unsigned *pins;
714 unsigned npins;
715 int i, ret;
716
717 ret = amd_get_group_pins(pctldev, group, &pins, &npins);
718 if (ret)
719 return ret;
720 for (i = 0; i < npins; i++) {
721 if (amd_pinconf_set(pctldev, pins[i], configs, num_configs))
722 return -ENOTSUPP;
723 }
724 return 0;
725 }
726
727 static const struct pinconf_ops amd_pinconf_ops = {
728 .pin_config_get = amd_pinconf_get,
729 .pin_config_set = amd_pinconf_set,
730 .pin_config_group_get = amd_pinconf_group_get,
731 .pin_config_group_set = amd_pinconf_group_set,
732 };
733
734 static struct pinctrl_desc amd_pinctrl_desc = {
735 .pins = kerncz_pins,
736 .npins = ARRAY_SIZE(kerncz_pins),
737 .pctlops = &amd_pinctrl_ops,
738 .confops = &amd_pinconf_ops,
739 .owner = THIS_MODULE,
740 };
741
742 static int amd_gpio_probe(struct platform_device *pdev)
743 {
744 int ret = 0;
745 int irq_base;
746 struct resource *res;
747 struct amd_gpio *gpio_dev;
748
749 gpio_dev = devm_kzalloc(&pdev->dev,
750 sizeof(struct amd_gpio), GFP_KERNEL);
751 if (!gpio_dev)
752 return -ENOMEM;
753
754 spin_lock_init(&gpio_dev->lock);
755
756 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
757 if (!res) {
758 dev_err(&pdev->dev, "Failed to get gpio io resource.\n");
759 return -EINVAL;
760 }
761
762 gpio_dev->base = devm_ioremap_nocache(&pdev->dev, res->start,
763 resource_size(res));
764 if (!gpio_dev->base)
765 return -ENOMEM;
766
767 irq_base = platform_get_irq(pdev, 0);
768 if (irq_base < 0) {
769 dev_err(&pdev->dev, "Failed to get gpio IRQ.\n");
770 return -EINVAL;
771 }
772
773 gpio_dev->pdev = pdev;
774 gpio_dev->gc.direction_input = amd_gpio_direction_input;
775 gpio_dev->gc.direction_output = amd_gpio_direction_output;
776 gpio_dev->gc.get = amd_gpio_get_value;
777 gpio_dev->gc.set = amd_gpio_set_value;
778 gpio_dev->gc.set_config = amd_gpio_set_config;
779 gpio_dev->gc.dbg_show = amd_gpio_dbg_show;
780
781 gpio_dev->gc.base = -1;
782 gpio_dev->gc.label = pdev->name;
783 gpio_dev->gc.owner = THIS_MODULE;
784 gpio_dev->gc.parent = &pdev->dev;
785 gpio_dev->gc.ngpio = resource_size(res) / 4;
786 #if defined(CONFIG_OF_GPIO)
787 gpio_dev->gc.of_node = pdev->dev.of_node;
788 #endif
789
790 gpio_dev->hwbank_num = gpio_dev->gc.ngpio / 64;
791 gpio_dev->groups = kerncz_groups;
792 gpio_dev->ngroups = ARRAY_SIZE(kerncz_groups);
793
794 amd_pinctrl_desc.name = dev_name(&pdev->dev);
795 gpio_dev->pctrl = devm_pinctrl_register(&pdev->dev, &amd_pinctrl_desc,
796 gpio_dev);
797 if (IS_ERR(gpio_dev->pctrl)) {
798 dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
799 return PTR_ERR(gpio_dev->pctrl);
800 }
801
802 ret = gpiochip_add_data(&gpio_dev->gc, gpio_dev);
803 if (ret)
804 return ret;
805
806 ret = gpiochip_add_pin_range(&gpio_dev->gc, dev_name(&pdev->dev),
807 0, 0, gpio_dev->gc.ngpio);
808 if (ret) {
809 dev_err(&pdev->dev, "Failed to add pin range\n");
810 goto out2;
811 }
812
813 ret = gpiochip_irqchip_add(&gpio_dev->gc,
814 &amd_gpio_irqchip,
815 0,
816 handle_simple_irq,
817 IRQ_TYPE_NONE);
818 if (ret) {
819 dev_err(&pdev->dev, "could not add irqchip\n");
820 ret = -ENODEV;
821 goto out2;
822 }
823
824 gpiochip_set_chained_irqchip(&gpio_dev->gc,
825 &amd_gpio_irqchip,
826 irq_base,
827 amd_gpio_irq_handler);
828 platform_set_drvdata(pdev, gpio_dev);
829
830 dev_dbg(&pdev->dev, "amd gpio driver loaded\n");
831 return ret;
832
833 out2:
834 gpiochip_remove(&gpio_dev->gc);
835
836 return ret;
837 }
838
839 static int amd_gpio_remove(struct platform_device *pdev)
840 {
841 struct amd_gpio *gpio_dev;
842
843 gpio_dev = platform_get_drvdata(pdev);
844
845 gpiochip_remove(&gpio_dev->gc);
846
847 return 0;
848 }
849
850 static const struct acpi_device_id amd_gpio_acpi_match[] = {
851 { "AMD0030", 0 },
852 { "AMDI0030", 0},
853 { },
854 };
855 MODULE_DEVICE_TABLE(acpi, amd_gpio_acpi_match);
856
857 static struct platform_driver amd_gpio_driver = {
858 .driver = {
859 .name = "amd_gpio",
860 .acpi_match_table = ACPI_PTR(amd_gpio_acpi_match),
861 },
862 .probe = amd_gpio_probe,
863 .remove = amd_gpio_remove,
864 };
865
866 module_platform_driver(amd_gpio_driver);
867
868 MODULE_LICENSE("GPL v2");
869 MODULE_AUTHOR("Ken Xue <Ken.Xue@amd.com>, Jeff Wu <Jeff.Wu@amd.com>");
870 MODULE_DESCRIPTION("AMD GPIO pinctrl driver");
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