ASoC: compress: Fix leak of a widget list in soc_compr_open_fe
[cascardo/linux.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         /*
47          * Suppose BIOS or Bootloader sets specific debounce for the
48          * GPIO. if not, set debounce to be  2.75ms and remove glitch.
49         */
50         if ((pin_reg & DB_TMR_OUT_MASK) == 0) {
51                 pin_reg |= 0xf;
52                 pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
53                 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
54                 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
55         }
56
57         pin_reg &= ~BIT(OUTPUT_ENABLE_OFF);
58         writel(pin_reg, gpio_dev->base + offset * 4);
59         spin_unlock_irqrestore(&gpio_dev->lock, flags);
60
61         return 0;
62 }
63
64 static int amd_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
65                 int value)
66 {
67         u32 pin_reg;
68         unsigned long flags;
69         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
70
71         spin_lock_irqsave(&gpio_dev->lock, flags);
72         pin_reg = readl(gpio_dev->base + offset * 4);
73         pin_reg |= BIT(OUTPUT_ENABLE_OFF);
74         if (value)
75                 pin_reg |= BIT(OUTPUT_VALUE_OFF);
76         else
77                 pin_reg &= ~BIT(OUTPUT_VALUE_OFF);
78         writel(pin_reg, gpio_dev->base + offset * 4);
79         spin_unlock_irqrestore(&gpio_dev->lock, flags);
80
81         return 0;
82 }
83
84 static int amd_gpio_get_value(struct gpio_chip *gc, unsigned offset)
85 {
86         u32 pin_reg;
87         unsigned long flags;
88         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
89
90         spin_lock_irqsave(&gpio_dev->lock, flags);
91         pin_reg = readl(gpio_dev->base + offset * 4);
92         spin_unlock_irqrestore(&gpio_dev->lock, flags);
93
94         return !!(pin_reg & BIT(PIN_STS_OFF));
95 }
96
97 static void amd_gpio_set_value(struct gpio_chip *gc, unsigned offset, int value)
98 {
99         u32 pin_reg;
100         unsigned long flags;
101         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
102
103         spin_lock_irqsave(&gpio_dev->lock, flags);
104         pin_reg = readl(gpio_dev->base + offset * 4);
105         if (value)
106                 pin_reg |= BIT(OUTPUT_VALUE_OFF);
107         else
108                 pin_reg &= ~BIT(OUTPUT_VALUE_OFF);
109         writel(pin_reg, gpio_dev->base + offset * 4);
110         spin_unlock_irqrestore(&gpio_dev->lock, flags);
111 }
112
113 static int amd_gpio_set_debounce(struct gpio_chip *gc, unsigned offset,
114                 unsigned debounce)
115 {
116         u32 time;
117         u32 pin_reg;
118         int ret = 0;
119         unsigned long flags;
120         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
121
122         spin_lock_irqsave(&gpio_dev->lock, flags);
123         pin_reg = readl(gpio_dev->base + offset * 4);
124
125         if (debounce) {
126                 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
127                 pin_reg &= ~DB_TMR_OUT_MASK;
128                 /*
129                 Debounce        Debounce        Timer   Max
130                 TmrLarge        TmrOutUnit      Unit    Debounce
131                                                         Time
132                 0       0       61 usec (2 RtcClk)      976 usec
133                 0       1       244 usec (8 RtcClk)     3.9 msec
134                 1       0       15.6 msec (512 RtcClk)  250 msec
135                 1       1       62.5 msec (2048 RtcClk) 1 sec
136                 */
137
138                 if (debounce < 61) {
139                         pin_reg |= 1;
140                         pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
141                         pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
142                 } else if (debounce < 976) {
143                         time = debounce / 61;
144                         pin_reg |= time & DB_TMR_OUT_MASK;
145                         pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
146                         pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
147                 } else if (debounce < 3900) {
148                         time = debounce / 244;
149                         pin_reg |= time & DB_TMR_OUT_MASK;
150                         pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
151                         pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
152                 } else if (debounce < 250000) {
153                         time = debounce / 15600;
154                         pin_reg |= time & DB_TMR_OUT_MASK;
155                         pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
156                         pin_reg |= BIT(DB_TMR_LARGE_OFF);
157                 } else if (debounce < 1000000) {
158                         time = debounce / 62500;
159                         pin_reg |= time & DB_TMR_OUT_MASK;
160                         pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
161                         pin_reg |= BIT(DB_TMR_LARGE_OFF);
162                 } else {
163                         pin_reg &= ~DB_CNTRl_MASK;
164                         ret = -EINVAL;
165                 }
166         } else {
167                 pin_reg &= ~BIT(DB_TMR_OUT_UNIT_OFF);
168                 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
169                 pin_reg &= ~DB_TMR_OUT_MASK;
170                 pin_reg &= ~DB_CNTRl_MASK;
171         }
172         writel(pin_reg, gpio_dev->base + offset * 4);
173         spin_unlock_irqrestore(&gpio_dev->lock, flags);
174
175         return ret;
176 }
177
178 #ifdef CONFIG_DEBUG_FS
179 static void amd_gpio_dbg_show(struct seq_file *s, struct gpio_chip *gc)
180 {
181         u32 pin_reg;
182         unsigned long flags;
183         unsigned int bank, i, pin_num;
184         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
185
186         char *level_trig;
187         char *active_level;
188         char *interrupt_enable;
189         char *interrupt_mask;
190         char *wake_cntrl0;
191         char *wake_cntrl1;
192         char *wake_cntrl2;
193         char *pin_sts;
194         char *pull_up_sel;
195         char *pull_up_enable;
196         char *pull_down_enable;
197         char *output_value;
198         char *output_enable;
199
200         for (bank = 0; bank < AMD_GPIO_TOTAL_BANKS; bank++) {
201                 seq_printf(s, "GPIO bank%d\t", bank);
202
203                 switch (bank) {
204                 case 0:
205                         i = 0;
206                         pin_num = AMD_GPIO_PINS_BANK0;
207                         break;
208                 case 1:
209                         i = 64;
210                         pin_num = AMD_GPIO_PINS_BANK1 + i;
211                         break;
212                 case 2:
213                         i = 128;
214                         pin_num = AMD_GPIO_PINS_BANK2 + i;
215                         break;
216                 }
217
218                 for (; i < pin_num; i++) {
219                         seq_printf(s, "pin%d\t", i);
220                         spin_lock_irqsave(&gpio_dev->lock, flags);
221                         pin_reg = readl(gpio_dev->base + i * 4);
222                         spin_unlock_irqrestore(&gpio_dev->lock, flags);
223
224                         if (pin_reg & BIT(INTERRUPT_ENABLE_OFF)) {
225                                 interrupt_enable = "interrupt is enabled|";
226
227                                 if (!(pin_reg & BIT(ACTIVE_LEVEL_OFF))
228                                 && !(pin_reg & BIT(ACTIVE_LEVEL_OFF+1)))
229                                         active_level = "Active low|";
230                                 else if (pin_reg & BIT(ACTIVE_LEVEL_OFF)
231                                 && !(pin_reg & BIT(ACTIVE_LEVEL_OFF+1)))
232                                         active_level = "Active high|";
233                                 else if (!(pin_reg & BIT(ACTIVE_LEVEL_OFF))
234                                         && pin_reg & BIT(ACTIVE_LEVEL_OFF+1))
235                                         active_level = "Active on both|";
236                                 else
237                                         active_level = "Unknow Active level|";
238
239                                 if (pin_reg & BIT(LEVEL_TRIG_OFF))
240                                         level_trig = "Level trigger|";
241                                 else
242                                         level_trig = "Edge trigger|";
243
244                         } else {
245                                 interrupt_enable =
246                                         "interrupt is disabled|";
247                                 active_level = " ";
248                                 level_trig = " ";
249                         }
250
251                         if (pin_reg & BIT(INTERRUPT_MASK_OFF))
252                                 interrupt_mask =
253                                         "interrupt is unmasked|";
254                         else
255                                 interrupt_mask =
256                                         "interrupt is masked|";
257
258                         if (pin_reg & BIT(WAKE_CNTRL_OFF))
259                                 wake_cntrl0 = "enable wakeup in S0i3 state|";
260                         else
261                                 wake_cntrl0 = "disable wakeup in S0i3 state|";
262
263                         if (pin_reg & BIT(WAKE_CNTRL_OFF))
264                                 wake_cntrl1 = "enable wakeup in S3 state|";
265                         else
266                                 wake_cntrl1 = "disable wakeup in S3 state|";
267
268                         if (pin_reg & BIT(WAKE_CNTRL_OFF))
269                                 wake_cntrl2 = "enable wakeup in S4/S5 state|";
270                         else
271                                 wake_cntrl2 = "disable wakeup in S4/S5 state|";
272
273                         if (pin_reg & BIT(PULL_UP_ENABLE_OFF)) {
274                                 pull_up_enable = "pull-up is enabled|";
275                                 if (pin_reg & BIT(PULL_UP_SEL_OFF))
276                                         pull_up_sel = "8k pull-up|";
277                                 else
278                                         pull_up_sel = "4k pull-up|";
279                         } else {
280                                 pull_up_enable = "pull-up is disabled|";
281                                 pull_up_sel = " ";
282                         }
283
284                         if (pin_reg & BIT(PULL_DOWN_ENABLE_OFF))
285                                 pull_down_enable = "pull-down is enabled|";
286                         else
287                                 pull_down_enable = "Pull-down is disabled|";
288
289                         if (pin_reg & BIT(OUTPUT_ENABLE_OFF)) {
290                                 pin_sts = " ";
291                                 output_enable = "output is enabled|";
292                                 if (pin_reg & BIT(OUTPUT_VALUE_OFF))
293                                         output_value = "output is high|";
294                                 else
295                                         output_value = "output is low|";
296                         } else {
297                                 output_enable = "output is disabled|";
298                                 output_value = " ";
299
300                                 if (pin_reg & BIT(PIN_STS_OFF))
301                                         pin_sts = "input is high|";
302                                 else
303                                         pin_sts = "input is low|";
304                         }
305
306                         seq_printf(s, "%s %s %s %s %s %s\n"
307                                 " %s %s %s %s %s %s %s 0x%x\n",
308                                 level_trig, active_level, interrupt_enable,
309                                 interrupt_mask, wake_cntrl0, wake_cntrl1,
310                                 wake_cntrl2, pin_sts, pull_up_sel,
311                                 pull_up_enable, pull_down_enable,
312                                 output_value, output_enable, pin_reg);
313                 }
314         }
315 }
316 #else
317 #define amd_gpio_dbg_show NULL
318 #endif
319
320 static void amd_gpio_irq_enable(struct irq_data *d)
321 {
322         u32 pin_reg;
323         unsigned long flags;
324         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
325         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
326
327         spin_lock_irqsave(&gpio_dev->lock, flags);
328         pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
329         /*
330                 Suppose BIOS or Bootloader sets specific debounce for the
331                 GPIO. if not, set debounce to be  2.75ms.
332         */
333         if ((pin_reg & DB_TMR_OUT_MASK) == 0) {
334                 pin_reg |= 0xf;
335                 pin_reg |= BIT(DB_TMR_OUT_UNIT_OFF);
336                 pin_reg &= ~BIT(DB_TMR_LARGE_OFF);
337         }
338         pin_reg |= BIT(INTERRUPT_ENABLE_OFF);
339         pin_reg |= BIT(INTERRUPT_MASK_OFF);
340         writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
341         spin_unlock_irqrestore(&gpio_dev->lock, flags);
342 }
343
344 static void amd_gpio_irq_disable(struct irq_data *d)
345 {
346         u32 pin_reg;
347         unsigned long flags;
348         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
349         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
350
351         spin_lock_irqsave(&gpio_dev->lock, flags);
352         pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
353         pin_reg &= ~BIT(INTERRUPT_ENABLE_OFF);
354         pin_reg &= ~BIT(INTERRUPT_MASK_OFF);
355         writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
356         spin_unlock_irqrestore(&gpio_dev->lock, flags);
357 }
358
359 static void amd_gpio_irq_mask(struct irq_data *d)
360 {
361         u32 pin_reg;
362         unsigned long flags;
363         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
364         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
365
366         spin_lock_irqsave(&gpio_dev->lock, flags);
367         pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
368         pin_reg &= ~BIT(INTERRUPT_MASK_OFF);
369         writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
370         spin_unlock_irqrestore(&gpio_dev->lock, flags);
371 }
372
373 static void amd_gpio_irq_unmask(struct irq_data *d)
374 {
375         u32 pin_reg;
376         unsigned long flags;
377         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
378         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
379
380         spin_lock_irqsave(&gpio_dev->lock, flags);
381         pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
382         pin_reg |= BIT(INTERRUPT_MASK_OFF);
383         writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
384         spin_unlock_irqrestore(&gpio_dev->lock, flags);
385 }
386
387 static void amd_gpio_irq_eoi(struct irq_data *d)
388 {
389         u32 reg;
390         unsigned long flags;
391         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
392         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
393
394         spin_lock_irqsave(&gpio_dev->lock, flags);
395         reg = readl(gpio_dev->base + WAKE_INT_MASTER_REG);
396         reg |= EOI_MASK;
397         writel(reg, gpio_dev->base + WAKE_INT_MASTER_REG);
398         spin_unlock_irqrestore(&gpio_dev->lock, flags);
399 }
400
401 static int amd_gpio_irq_set_type(struct irq_data *d, unsigned int type)
402 {
403         int ret = 0;
404         u32 pin_reg;
405         unsigned long flags;
406         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
407         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
408
409         spin_lock_irqsave(&gpio_dev->lock, flags);
410         pin_reg = readl(gpio_dev->base + (d->hwirq)*4);
411
412         switch (type & IRQ_TYPE_SENSE_MASK) {
413         case IRQ_TYPE_EDGE_RISING:
414                 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
415                 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
416                 pin_reg |= ACTIVE_HIGH << ACTIVE_LEVEL_OFF;
417                 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
418                 irq_set_handler_locked(d, handle_edge_irq);
419                 break;
420
421         case IRQ_TYPE_EDGE_FALLING:
422                 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
423                 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
424                 pin_reg |= ACTIVE_LOW << ACTIVE_LEVEL_OFF;
425                 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
426                 irq_set_handler_locked(d, handle_edge_irq);
427                 break;
428
429         case IRQ_TYPE_EDGE_BOTH:
430                 pin_reg &= ~BIT(LEVEL_TRIG_OFF);
431                 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
432                 pin_reg |= BOTH_EADGE << ACTIVE_LEVEL_OFF;
433                 pin_reg |= DB_TYPE_REMOVE_GLITCH << DB_CNTRL_OFF;
434                 irq_set_handler_locked(d, handle_edge_irq);
435                 break;
436
437         case IRQ_TYPE_LEVEL_HIGH:
438                 pin_reg |= LEVEL_TRIGGER << LEVEL_TRIG_OFF;
439                 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
440                 pin_reg |= ACTIVE_HIGH << ACTIVE_LEVEL_OFF;
441                 pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
442                 pin_reg |= DB_TYPE_PRESERVE_LOW_GLITCH << DB_CNTRL_OFF;
443                 irq_set_handler_locked(d, handle_level_irq);
444                 break;
445
446         case IRQ_TYPE_LEVEL_LOW:
447                 pin_reg |= LEVEL_TRIGGER << LEVEL_TRIG_OFF;
448                 pin_reg &= ~(ACTIVE_LEVEL_MASK << ACTIVE_LEVEL_OFF);
449                 pin_reg |= ACTIVE_LOW << ACTIVE_LEVEL_OFF;
450                 pin_reg &= ~(DB_CNTRl_MASK << DB_CNTRL_OFF);
451                 pin_reg |= DB_TYPE_PRESERVE_HIGH_GLITCH << DB_CNTRL_OFF;
452                 irq_set_handler_locked(d, handle_level_irq);
453                 break;
454
455         case IRQ_TYPE_NONE:
456                 break;
457
458         default:
459                 dev_err(&gpio_dev->pdev->dev, "Invalid type value\n");
460                 ret = -EINVAL;
461         }
462
463         pin_reg |= CLR_INTR_STAT << INTERRUPT_STS_OFF;
464         writel(pin_reg, gpio_dev->base + (d->hwirq)*4);
465         spin_unlock_irqrestore(&gpio_dev->lock, flags);
466
467         return ret;
468 }
469
470 static void amd_irq_ack(struct irq_data *d)
471 {
472         /*
473          * based on HW design,there is no need to ack HW
474          * before handle current irq. But this routine is
475          * necessary for handle_edge_irq
476         */
477 }
478
479 static struct irq_chip amd_gpio_irqchip = {
480         .name         = "amd_gpio",
481         .irq_ack      = amd_irq_ack,
482         .irq_enable   = amd_gpio_irq_enable,
483         .irq_disable  = amd_gpio_irq_disable,
484         .irq_mask     = amd_gpio_irq_mask,
485         .irq_unmask   = amd_gpio_irq_unmask,
486         .irq_eoi      = amd_gpio_irq_eoi,
487         .irq_set_type = amd_gpio_irq_set_type,
488 };
489
490 static void amd_gpio_irq_handler(struct irq_desc *desc)
491 {
492         u32 i;
493         u32 off;
494         u32 reg;
495         u32 pin_reg;
496         u64 reg64;
497         int handled = 0;
498         unsigned int irq;
499         unsigned long flags;
500         struct irq_chip *chip = irq_desc_get_chip(desc);
501         struct gpio_chip *gc = irq_desc_get_handler_data(desc);
502         struct amd_gpio *gpio_dev = gpiochip_get_data(gc);
503
504         chained_irq_enter(chip, desc);
505         /*enable GPIO interrupt again*/
506         spin_lock_irqsave(&gpio_dev->lock, flags);
507         reg = readl(gpio_dev->base + WAKE_INT_STATUS_REG1);
508         reg64 = reg;
509         reg64 = reg64 << 32;
510
511         reg = readl(gpio_dev->base + WAKE_INT_STATUS_REG0);
512         reg64 |= reg;
513         spin_unlock_irqrestore(&gpio_dev->lock, flags);
514
515         /*
516          * first 46 bits indicates interrupt status.
517          * one bit represents four interrupt sources.
518         */
519         for (off = 0; off < 46 ; off++) {
520                 if (reg64 & BIT(off)) {
521                         for (i = 0; i < 4; i++) {
522                                 pin_reg = readl(gpio_dev->base +
523                                                 (off * 4 + i) * 4);
524                                 if ((pin_reg & BIT(INTERRUPT_STS_OFF)) ||
525                                         (pin_reg & BIT(WAKE_STS_OFF))) {
526                                         irq = irq_find_mapping(gc->irqdomain,
527                                                                 off * 4 + i);
528                                         generic_handle_irq(irq);
529                                         writel(pin_reg,
530                                                 gpio_dev->base
531                                                 + (off * 4 + i) * 4);
532                                         handled++;
533                                 }
534                         }
535                 }
536         }
537
538         if (handled == 0)
539                 handle_bad_irq(desc);
540
541         spin_lock_irqsave(&gpio_dev->lock, flags);
542         reg = readl(gpio_dev->base + WAKE_INT_MASTER_REG);
543         reg |= EOI_MASK;
544         writel(reg, gpio_dev->base + WAKE_INT_MASTER_REG);
545         spin_unlock_irqrestore(&gpio_dev->lock, flags);
546
547         chained_irq_exit(chip, desc);
548 }
549
550 static int amd_get_groups_count(struct pinctrl_dev *pctldev)
551 {
552         struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
553
554         return gpio_dev->ngroups;
555 }
556
557 static const char *amd_get_group_name(struct pinctrl_dev *pctldev,
558                                       unsigned group)
559 {
560         struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
561
562         return gpio_dev->groups[group].name;
563 }
564
565 static int amd_get_group_pins(struct pinctrl_dev *pctldev,
566                               unsigned group,
567                               const unsigned **pins,
568                               unsigned *num_pins)
569 {
570         struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
571
572         *pins = gpio_dev->groups[group].pins;
573         *num_pins = gpio_dev->groups[group].npins;
574         return 0;
575 }
576
577 static const struct pinctrl_ops amd_pinctrl_ops = {
578         .get_groups_count       = amd_get_groups_count,
579         .get_group_name         = amd_get_group_name,
580         .get_group_pins         = amd_get_group_pins,
581 #ifdef CONFIG_OF
582         .dt_node_to_map         = pinconf_generic_dt_node_to_map_group,
583         .dt_free_map            = pinctrl_utils_free_map,
584 #endif
585 };
586
587 static int amd_pinconf_get(struct pinctrl_dev *pctldev,
588                           unsigned int pin,
589                           unsigned long *config)
590 {
591         u32 pin_reg;
592         unsigned arg;
593         unsigned long flags;
594         struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
595         enum pin_config_param param = pinconf_to_config_param(*config);
596
597         spin_lock_irqsave(&gpio_dev->lock, flags);
598         pin_reg = readl(gpio_dev->base + pin*4);
599         spin_unlock_irqrestore(&gpio_dev->lock, flags);
600         switch (param) {
601         case PIN_CONFIG_INPUT_DEBOUNCE:
602                 arg = pin_reg & DB_TMR_OUT_MASK;
603                 break;
604
605         case PIN_CONFIG_BIAS_PULL_DOWN:
606                 arg = (pin_reg >> PULL_DOWN_ENABLE_OFF) & BIT(0);
607                 break;
608
609         case PIN_CONFIG_BIAS_PULL_UP:
610                 arg = (pin_reg >> PULL_UP_SEL_OFF) & (BIT(0) | BIT(1));
611                 break;
612
613         case PIN_CONFIG_DRIVE_STRENGTH:
614                 arg = (pin_reg >> DRV_STRENGTH_SEL_OFF) & DRV_STRENGTH_SEL_MASK;
615                 break;
616
617         default:
618                 dev_err(&gpio_dev->pdev->dev, "Invalid config param %04x\n",
619                         param);
620                 return -ENOTSUPP;
621         }
622
623         *config = pinconf_to_config_packed(param, arg);
624
625         return 0;
626 }
627
628 static int amd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
629                                 unsigned long *configs, unsigned num_configs)
630 {
631         int i;
632         u32 arg;
633         int ret = 0;
634         u32 pin_reg;
635         unsigned long flags;
636         enum pin_config_param param;
637         struct amd_gpio *gpio_dev = pinctrl_dev_get_drvdata(pctldev);
638
639         spin_lock_irqsave(&gpio_dev->lock, flags);
640         for (i = 0; i < num_configs; i++) {
641                 param = pinconf_to_config_param(configs[i]);
642                 arg = pinconf_to_config_argument(configs[i]);
643                 pin_reg = readl(gpio_dev->base + pin*4);
644
645                 switch (param) {
646                 case PIN_CONFIG_INPUT_DEBOUNCE:
647                         pin_reg &= ~DB_TMR_OUT_MASK;
648                         pin_reg |= arg & DB_TMR_OUT_MASK;
649                         break;
650
651                 case PIN_CONFIG_BIAS_PULL_DOWN:
652                         pin_reg &= ~BIT(PULL_DOWN_ENABLE_OFF);
653                         pin_reg |= (arg & BIT(0)) << PULL_DOWN_ENABLE_OFF;
654                         break;
655
656                 case PIN_CONFIG_BIAS_PULL_UP:
657                         pin_reg &= ~BIT(PULL_UP_SEL_OFF);
658                         pin_reg |= (arg & BIT(0)) << PULL_UP_SEL_OFF;
659                         pin_reg &= ~BIT(PULL_UP_ENABLE_OFF);
660                         pin_reg |= ((arg>>1) & BIT(0)) << PULL_UP_ENABLE_OFF;
661                         break;
662
663                 case PIN_CONFIG_DRIVE_STRENGTH:
664                         pin_reg &= ~(DRV_STRENGTH_SEL_MASK
665                                         << DRV_STRENGTH_SEL_OFF);
666                         pin_reg |= (arg & DRV_STRENGTH_SEL_MASK)
667                                         << DRV_STRENGTH_SEL_OFF;
668                         break;
669
670                 default:
671                         dev_err(&gpio_dev->pdev->dev,
672                                 "Invalid config param %04x\n", param);
673                         ret = -ENOTSUPP;
674                 }
675
676                 writel(pin_reg, gpio_dev->base + pin*4);
677         }
678         spin_unlock_irqrestore(&gpio_dev->lock, flags);
679
680         return ret;
681 }
682
683 static int amd_pinconf_group_get(struct pinctrl_dev *pctldev,
684                                 unsigned int group,
685                                 unsigned long *config)
686 {
687         const unsigned *pins;
688         unsigned npins;
689         int ret;
690
691         ret = amd_get_group_pins(pctldev, group, &pins, &npins);
692         if (ret)
693                 return ret;
694
695         if (amd_pinconf_get(pctldev, pins[0], config))
696                         return -ENOTSUPP;
697
698         return 0;
699 }
700
701 static int amd_pinconf_group_set(struct pinctrl_dev *pctldev,
702                                 unsigned group, unsigned long *configs,
703                                 unsigned num_configs)
704 {
705         const unsigned *pins;
706         unsigned npins;
707         int i, ret;
708
709         ret = amd_get_group_pins(pctldev, group, &pins, &npins);
710         if (ret)
711                 return ret;
712         for (i = 0; i < npins; i++) {
713                 if (amd_pinconf_set(pctldev, pins[i], configs, num_configs))
714                         return -ENOTSUPP;
715         }
716         return 0;
717 }
718
719 static const struct pinconf_ops amd_pinconf_ops = {
720         .pin_config_get         = amd_pinconf_get,
721         .pin_config_set         = amd_pinconf_set,
722         .pin_config_group_get = amd_pinconf_group_get,
723         .pin_config_group_set = amd_pinconf_group_set,
724 };
725
726 static struct pinctrl_desc amd_pinctrl_desc = {
727         .pins   = kerncz_pins,
728         .npins = ARRAY_SIZE(kerncz_pins),
729         .pctlops = &amd_pinctrl_ops,
730         .confops = &amd_pinconf_ops,
731         .owner = THIS_MODULE,
732 };
733
734 static int amd_gpio_probe(struct platform_device *pdev)
735 {
736         int ret = 0;
737         int irq_base;
738         struct resource *res;
739         struct amd_gpio *gpio_dev;
740
741         gpio_dev = devm_kzalloc(&pdev->dev,
742                                 sizeof(struct amd_gpio), GFP_KERNEL);
743         if (!gpio_dev)
744                 return -ENOMEM;
745
746         spin_lock_init(&gpio_dev->lock);
747
748         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
749         if (!res) {
750                 dev_err(&pdev->dev, "Failed to get gpio io resource.\n");
751                 return -EINVAL;
752         }
753
754         gpio_dev->base = devm_ioremap_nocache(&pdev->dev, res->start,
755                                                 resource_size(res));
756         if (!gpio_dev->base)
757                 return -ENOMEM;
758
759         irq_base = platform_get_irq(pdev, 0);
760         if (irq_base < 0) {
761                 dev_err(&pdev->dev, "Failed to get gpio IRQ.\n");
762                 return -EINVAL;
763         }
764
765         gpio_dev->pdev = pdev;
766         gpio_dev->gc.direction_input    = amd_gpio_direction_input;
767         gpio_dev->gc.direction_output   = amd_gpio_direction_output;
768         gpio_dev->gc.get                        = amd_gpio_get_value;
769         gpio_dev->gc.set                        = amd_gpio_set_value;
770         gpio_dev->gc.set_debounce       = amd_gpio_set_debounce;
771         gpio_dev->gc.dbg_show           = amd_gpio_dbg_show;
772
773         gpio_dev->gc.base                       = 0;
774         gpio_dev->gc.label                      = pdev->name;
775         gpio_dev->gc.owner                      = THIS_MODULE;
776         gpio_dev->gc.parent                     = &pdev->dev;
777         gpio_dev->gc.ngpio                      = TOTAL_NUMBER_OF_PINS;
778 #if defined(CONFIG_OF_GPIO)
779         gpio_dev->gc.of_node                    = pdev->dev.of_node;
780 #endif
781
782         gpio_dev->groups = kerncz_groups;
783         gpio_dev->ngroups = ARRAY_SIZE(kerncz_groups);
784
785         amd_pinctrl_desc.name = dev_name(&pdev->dev);
786         gpio_dev->pctrl = devm_pinctrl_register(&pdev->dev, &amd_pinctrl_desc,
787                                                 gpio_dev);
788         if (IS_ERR(gpio_dev->pctrl)) {
789                 dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
790                 return PTR_ERR(gpio_dev->pctrl);
791         }
792
793         ret = gpiochip_add_data(&gpio_dev->gc, gpio_dev);
794         if (ret)
795                 return ret;
796
797         ret = gpiochip_add_pin_range(&gpio_dev->gc, dev_name(&pdev->dev),
798                                 0, 0, TOTAL_NUMBER_OF_PINS);
799         if (ret) {
800                 dev_err(&pdev->dev, "Failed to add pin range\n");
801                 goto out2;
802         }
803
804         ret = gpiochip_irqchip_add(&gpio_dev->gc,
805                                 &amd_gpio_irqchip,
806                                 0,
807                                 handle_simple_irq,
808                                 IRQ_TYPE_NONE);
809         if (ret) {
810                 dev_err(&pdev->dev, "could not add irqchip\n");
811                 ret = -ENODEV;
812                 goto out2;
813         }
814
815         gpiochip_set_chained_irqchip(&gpio_dev->gc,
816                                  &amd_gpio_irqchip,
817                                  irq_base,
818                                  amd_gpio_irq_handler);
819
820         platform_set_drvdata(pdev, gpio_dev);
821
822         dev_dbg(&pdev->dev, "amd gpio driver loaded\n");
823         return ret;
824
825 out2:
826         gpiochip_remove(&gpio_dev->gc);
827
828         return ret;
829 }
830
831 static int amd_gpio_remove(struct platform_device *pdev)
832 {
833         struct amd_gpio *gpio_dev;
834
835         gpio_dev = platform_get_drvdata(pdev);
836
837         gpiochip_remove(&gpio_dev->gc);
838
839         return 0;
840 }
841
842 static const struct acpi_device_id amd_gpio_acpi_match[] = {
843         { "AMD0030", 0 },
844         { "AMDI0030", 0},
845         { },
846 };
847 MODULE_DEVICE_TABLE(acpi, amd_gpio_acpi_match);
848
849 static struct platform_driver amd_gpio_driver = {
850         .driver         = {
851                 .name   = "amd_gpio",
852                 .acpi_match_table = ACPI_PTR(amd_gpio_acpi_match),
853         },
854         .probe          = amd_gpio_probe,
855         .remove         = amd_gpio_remove,
856 };
857
858 module_platform_driver(amd_gpio_driver);
859
860 MODULE_LICENSE("GPL v2");
861 MODULE_AUTHOR("Ken Xue <Ken.Xue@amd.com>, Jeff Wu <Jeff.Wu@amd.com>");
862 MODULE_DESCRIPTION("AMD GPIO pinctrl driver");