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14#include <linux/init.h>
15#include <linux/irq.h>
16#include <linux/platform_device.h>
17#include <linux/io.h>
18#include <linux/slab.h>
19#include <linux/err.h>
20#include <linux/pinctrl/pinctrl.h>
21#include <linux/pinctrl/pinmux.h>
22#include <linux/pinctrl/consumer.h>
23#include <linux/pinctrl/machine.h>
24#include <linux/of.h>
25#include <linux/of_address.h>
26#include <linux/of_device.h>
27#include <linux/of_platform.h>
28#include <linux/bitops.h>
29#include <linux/gpio/driver.h>
30#include <linux/of_gpio.h>
31
32#include "pinctrl-sirf.h"
33
34#define DRIVER_NAME "pinmux-sirf"
35
36struct sirfsoc_gpio_bank {
37 int id;
38 int parent_irq;
39 spinlock_t lock;
40};
41
42struct sirfsoc_gpio_chip {
43 struct of_mm_gpio_chip chip;
44 struct sirfsoc_gpio_bank sgpio_bank[SIRFSOC_GPIO_NO_OF_BANKS];
45 spinlock_t lock;
46};
47
48static struct sirfsoc_pin_group *sirfsoc_pin_groups;
49static int sirfsoc_pingrp_cnt;
50
51static int sirfsoc_get_groups_count(struct pinctrl_dev *pctldev)
52{
53 return sirfsoc_pingrp_cnt;
54}
55
56static const char *sirfsoc_get_group_name(struct pinctrl_dev *pctldev,
57 unsigned selector)
58{
59 return sirfsoc_pin_groups[selector].name;
60}
61
62static int sirfsoc_get_group_pins(struct pinctrl_dev *pctldev,
63 unsigned selector,
64 const unsigned **pins,
65 unsigned *num_pins)
66{
67 *pins = sirfsoc_pin_groups[selector].pins;
68 *num_pins = sirfsoc_pin_groups[selector].num_pins;
69 return 0;
70}
71
72static void sirfsoc_pin_dbg_show(struct pinctrl_dev *pctldev,
73 struct seq_file *s, unsigned offset)
74{
75 seq_printf(s, " " DRIVER_NAME);
76}
77
78static int sirfsoc_dt_node_to_map(struct pinctrl_dev *pctldev,
79 struct device_node *np_config,
80 struct pinctrl_map **map, unsigned *num_maps)
81{
82 struct sirfsoc_pmx *spmx = pinctrl_dev_get_drvdata(pctldev);
83 struct device_node *np;
84 struct property *prop;
85 const char *function, *group;
86 int ret, index = 0, count = 0;
87
88
89 for_each_child_of_node(np_config, np) {
90 ret = of_property_read_string(np, "sirf,function", &function);
91 if (ret < 0) {
92 of_node_put(np);
93 return ret;
94 }
95
96 ret = of_property_count_strings(np, "sirf,pins");
97 if (ret < 0) {
98 of_node_put(np);
99 return ret;
100 }
101
102 count += ret;
103 }
104
105 if (!count) {
106 dev_err(spmx->dev, "No child nodes passed via DT\n");
107 return -ENODEV;
108 }
109
110 *map = kcalloc(count, sizeof(**map), GFP_KERNEL);
111 if (!*map)
112 return -ENOMEM;
113
114 for_each_child_of_node(np_config, np) {
115 of_property_read_string(np, "sirf,function", &function);
116 of_property_for_each_string(np, "sirf,pins", prop, group) {
117 (*map)[index].type = PIN_MAP_TYPE_MUX_GROUP;
118 (*map)[index].data.mux.group = group;
119 (*map)[index].data.mux.function = function;
120 index++;
121 }
122 }
123
124 *num_maps = count;
125
126 return 0;
127}
128
129static void sirfsoc_dt_free_map(struct pinctrl_dev *pctldev,
130 struct pinctrl_map *map, unsigned num_maps)
131{
132 kfree(map);
133}
134
135static const struct pinctrl_ops sirfsoc_pctrl_ops = {
136 .get_groups_count = sirfsoc_get_groups_count,
137 .get_group_name = sirfsoc_get_group_name,
138 .get_group_pins = sirfsoc_get_group_pins,
139 .pin_dbg_show = sirfsoc_pin_dbg_show,
140 .dt_node_to_map = sirfsoc_dt_node_to_map,
141 .dt_free_map = sirfsoc_dt_free_map,
142};
143
144static struct sirfsoc_pmx_func *sirfsoc_pmx_functions;
145static int sirfsoc_pmxfunc_cnt;
146
147static void sirfsoc_pinmux_endisable(struct sirfsoc_pmx *spmx,
148 unsigned selector, bool enable)
149{
150 int i;
151 const struct sirfsoc_padmux *mux =
152 sirfsoc_pmx_functions[selector].padmux;
153 const struct sirfsoc_muxmask *mask = mux->muxmask;
154
155 for (i = 0; i < mux->muxmask_counts; i++) {
156 u32 muxval;
157 muxval = readl(spmx->gpio_virtbase +
158 SIRFSOC_GPIO_PAD_EN(mask[i].group));
159 if (enable)
160 muxval = muxval & ~mask[i].mask;
161 else
162 muxval = muxval | mask[i].mask;
163 writel(muxval, spmx->gpio_virtbase +
164 SIRFSOC_GPIO_PAD_EN(mask[i].group));
165 }
166
167 if (mux->funcmask && enable) {
168 u32 func_en_val;
169
170 func_en_val =
171 readl(spmx->rsc_virtbase + mux->ctrlreg);
172 func_en_val =
173 (func_en_val & ~mux->funcmask) | (mux->funcval);
174 writel(func_en_val, spmx->rsc_virtbase + mux->ctrlreg);
175 }
176}
177
178static int sirfsoc_pinmux_set_mux(struct pinctrl_dev *pmxdev,
179 unsigned selector,
180 unsigned group)
181{
182 struct sirfsoc_pmx *spmx;
183
184 spmx = pinctrl_dev_get_drvdata(pmxdev);
185 sirfsoc_pinmux_endisable(spmx, selector, true);
186
187 return 0;
188}
189
190static int sirfsoc_pinmux_get_funcs_count(struct pinctrl_dev *pmxdev)
191{
192 return sirfsoc_pmxfunc_cnt;
193}
194
195static const char *sirfsoc_pinmux_get_func_name(struct pinctrl_dev *pctldev,
196 unsigned selector)
197{
198 return sirfsoc_pmx_functions[selector].name;
199}
200
201static int sirfsoc_pinmux_get_groups(struct pinctrl_dev *pctldev,
202 unsigned selector,
203 const char * const **groups,
204 unsigned * const num_groups)
205{
206 *groups = sirfsoc_pmx_functions[selector].groups;
207 *num_groups = sirfsoc_pmx_functions[selector].num_groups;
208 return 0;
209}
210
211static int sirfsoc_pinmux_request_gpio(struct pinctrl_dev *pmxdev,
212 struct pinctrl_gpio_range *range, unsigned offset)
213{
214 struct sirfsoc_pmx *spmx;
215
216 int group = range->id;
217
218 u32 muxval;
219
220 spmx = pinctrl_dev_get_drvdata(pmxdev);
221
222 muxval = readl(spmx->gpio_virtbase +
223 SIRFSOC_GPIO_PAD_EN(group));
224 muxval = muxval | (1 << (offset - range->pin_base));
225 writel(muxval, spmx->gpio_virtbase +
226 SIRFSOC_GPIO_PAD_EN(group));
227
228 return 0;
229}
230
231static const struct pinmux_ops sirfsoc_pinmux_ops = {
232 .set_mux = sirfsoc_pinmux_set_mux,
233 .get_functions_count = sirfsoc_pinmux_get_funcs_count,
234 .get_function_name = sirfsoc_pinmux_get_func_name,
235 .get_function_groups = sirfsoc_pinmux_get_groups,
236 .gpio_request_enable = sirfsoc_pinmux_request_gpio,
237};
238
239static struct pinctrl_desc sirfsoc_pinmux_desc = {
240 .name = DRIVER_NAME,
241 .pctlops = &sirfsoc_pctrl_ops,
242 .pmxops = &sirfsoc_pinmux_ops,
243 .owner = THIS_MODULE,
244};
245
246static void __iomem *sirfsoc_rsc_of_iomap(void)
247{
248 const struct of_device_id rsc_ids[] = {
249 { .compatible = "sirf,prima2-rsc" },
250 {}
251 };
252 struct device_node *np;
253
254 np = of_find_matching_node(NULL, rsc_ids);
255 if (!np)
256 panic("unable to find compatible rsc node in dtb\n");
257
258 return of_iomap(np, 0);
259}
260
261static int sirfsoc_gpio_of_xlate(struct gpio_chip *gc,
262 const struct of_phandle_args *gpiospec,
263 u32 *flags)
264{
265 if (gpiospec->args[0] > SIRFSOC_GPIO_NO_OF_BANKS * SIRFSOC_GPIO_BANK_SIZE)
266 return -EINVAL;
267
268 if (flags)
269 *flags = gpiospec->args[1];
270
271 return gpiospec->args[0];
272}
273
274static const struct of_device_id pinmux_ids[] = {
275 { .compatible = "sirf,prima2-pinctrl", .data = &prima2_pinctrl_data, },
276 { .compatible = "sirf,atlas6-pinctrl", .data = &atlas6_pinctrl_data, },
277 {}
278};
279
280static int sirfsoc_pinmux_probe(struct platform_device *pdev)
281{
282 int ret;
283 struct sirfsoc_pmx *spmx;
284 struct device_node *np = pdev->dev.of_node;
285 const struct sirfsoc_pinctrl_data *pdata;
286
287
288 spmx = devm_kzalloc(&pdev->dev, sizeof(*spmx), GFP_KERNEL);
289 if (!spmx)
290 return -ENOMEM;
291
292 spmx->dev = &pdev->dev;
293
294 platform_set_drvdata(pdev, spmx);
295
296 spmx->gpio_virtbase = of_iomap(np, 0);
297 if (!spmx->gpio_virtbase) {
298 dev_err(&pdev->dev, "can't map gpio registers\n");
299 return -ENOMEM;
300 }
301
302 spmx->rsc_virtbase = sirfsoc_rsc_of_iomap();
303 if (!spmx->rsc_virtbase) {
304 ret = -ENOMEM;
305 dev_err(&pdev->dev, "can't map rsc registers\n");
306 goto out_no_rsc_remap;
307 }
308
309 pdata = of_match_node(pinmux_ids, np)->data;
310 sirfsoc_pin_groups = pdata->grps;
311 sirfsoc_pingrp_cnt = pdata->grps_cnt;
312 sirfsoc_pmx_functions = pdata->funcs;
313 sirfsoc_pmxfunc_cnt = pdata->funcs_cnt;
314 sirfsoc_pinmux_desc.pins = pdata->pads;
315 sirfsoc_pinmux_desc.npins = pdata->pads_cnt;
316
317
318
319 spmx->pmx = pinctrl_register(&sirfsoc_pinmux_desc, &pdev->dev, spmx);
320 if (IS_ERR(spmx->pmx)) {
321 dev_err(&pdev->dev, "could not register SIRFSOC pinmux driver\n");
322 ret = PTR_ERR(spmx->pmx);
323 goto out_no_pmx;
324 }
325
326 dev_info(&pdev->dev, "initialized SIRFSOC pinmux driver\n");
327
328 return 0;
329
330out_no_pmx:
331 iounmap(spmx->rsc_virtbase);
332out_no_rsc_remap:
333 iounmap(spmx->gpio_virtbase);
334 return ret;
335}
336
337#ifdef CONFIG_PM_SLEEP
338static int sirfsoc_pinmux_suspend_noirq(struct device *dev)
339{
340 int i, j;
341 struct sirfsoc_pmx *spmx = dev_get_drvdata(dev);
342
343 for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
344 for (j = 0; j < SIRFSOC_GPIO_BANK_SIZE; j++) {
345 spmx->gpio_regs[i][j] = readl(spmx->gpio_virtbase +
346 SIRFSOC_GPIO_CTRL(i, j));
347 }
348 spmx->ints_regs[i] = readl(spmx->gpio_virtbase +
349 SIRFSOC_GPIO_INT_STATUS(i));
350 spmx->paden_regs[i] = readl(spmx->gpio_virtbase +
351 SIRFSOC_GPIO_PAD_EN(i));
352 }
353 spmx->dspen_regs = readl(spmx->gpio_virtbase + SIRFSOC_GPIO_DSP_EN0);
354
355 for (i = 0; i < 3; i++)
356 spmx->rsc_regs[i] = readl(spmx->rsc_virtbase + 4 * i);
357
358 return 0;
359}
360
361static int sirfsoc_pinmux_resume_noirq(struct device *dev)
362{
363 int i, j;
364 struct sirfsoc_pmx *spmx = dev_get_drvdata(dev);
365
366 for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
367 for (j = 0; j < SIRFSOC_GPIO_BANK_SIZE; j++) {
368 writel(spmx->gpio_regs[i][j], spmx->gpio_virtbase +
369 SIRFSOC_GPIO_CTRL(i, j));
370 }
371 writel(spmx->ints_regs[i], spmx->gpio_virtbase +
372 SIRFSOC_GPIO_INT_STATUS(i));
373 writel(spmx->paden_regs[i], spmx->gpio_virtbase +
374 SIRFSOC_GPIO_PAD_EN(i));
375 }
376 writel(spmx->dspen_regs, spmx->gpio_virtbase + SIRFSOC_GPIO_DSP_EN0);
377
378 for (i = 0; i < 3; i++)
379 writel(spmx->rsc_regs[i], spmx->rsc_virtbase + 4 * i);
380
381 return 0;
382}
383
384static const struct dev_pm_ops sirfsoc_pinmux_pm_ops = {
385 .suspend_noirq = sirfsoc_pinmux_suspend_noirq,
386 .resume_noirq = sirfsoc_pinmux_resume_noirq,
387 .freeze_noirq = sirfsoc_pinmux_suspend_noirq,
388 .restore_noirq = sirfsoc_pinmux_resume_noirq,
389};
390#endif
391
392static struct platform_driver sirfsoc_pinmux_driver = {
393 .driver = {
394 .name = DRIVER_NAME,
395 .of_match_table = pinmux_ids,
396#ifdef CONFIG_PM_SLEEP
397 .pm = &sirfsoc_pinmux_pm_ops,
398#endif
399 },
400 .probe = sirfsoc_pinmux_probe,
401};
402
403static int __init sirfsoc_pinmux_init(void)
404{
405 return platform_driver_register(&sirfsoc_pinmux_driver);
406}
407arch_initcall(sirfsoc_pinmux_init);
408
409static inline struct sirfsoc_gpio_bank *
410sirfsoc_gpio_to_bank(struct sirfsoc_gpio_chip *sgpio, unsigned int offset)
411{
412 return &sgpio->sgpio_bank[offset / SIRFSOC_GPIO_BANK_SIZE];
413}
414
415static inline int sirfsoc_gpio_to_bankoff(unsigned int offset)
416{
417 return offset % SIRFSOC_GPIO_BANK_SIZE;
418}
419
420static void sirfsoc_gpio_irq_ack(struct irq_data *d)
421{
422 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
423 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc);
424 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, d->hwirq);
425 int idx = sirfsoc_gpio_to_bankoff(d->hwirq);
426 u32 val, offset;
427 unsigned long flags;
428
429 offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
430
431 spin_lock_irqsave(&sgpio->lock, flags);
432
433 val = readl(sgpio->chip.regs + offset);
434
435 writel(val, sgpio->chip.regs + offset);
436
437 spin_unlock_irqrestore(&sgpio->lock, flags);
438}
439
440static void __sirfsoc_gpio_irq_mask(struct sirfsoc_gpio_chip *sgpio,
441 struct sirfsoc_gpio_bank *bank,
442 int idx)
443{
444 u32 val, offset;
445 unsigned long flags;
446
447 offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
448
449 spin_lock_irqsave(&sgpio->lock, flags);
450
451 val = readl(sgpio->chip.regs + offset);
452 val &= ~SIRFSOC_GPIO_CTL_INTR_EN_MASK;
453 val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK;
454 writel(val, sgpio->chip.regs + offset);
455
456 spin_unlock_irqrestore(&sgpio->lock, flags);
457}
458
459static void sirfsoc_gpio_irq_mask(struct irq_data *d)
460{
461 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
462 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc);
463 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, d->hwirq);
464
465 __sirfsoc_gpio_irq_mask(sgpio, bank, d->hwirq % SIRFSOC_GPIO_BANK_SIZE);
466}
467
468static void sirfsoc_gpio_irq_unmask(struct irq_data *d)
469{
470 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
471 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc);
472 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, d->hwirq);
473 int idx = sirfsoc_gpio_to_bankoff(d->hwirq);
474 u32 val, offset;
475 unsigned long flags;
476
477 offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
478
479 spin_lock_irqsave(&sgpio->lock, flags);
480
481 val = readl(sgpio->chip.regs + offset);
482 val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK;
483 val |= SIRFSOC_GPIO_CTL_INTR_EN_MASK;
484 writel(val, sgpio->chip.regs + offset);
485
486 spin_unlock_irqrestore(&sgpio->lock, flags);
487}
488
489static int sirfsoc_gpio_irq_type(struct irq_data *d, unsigned type)
490{
491 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
492 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc);
493 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, d->hwirq);
494 int idx = sirfsoc_gpio_to_bankoff(d->hwirq);
495 u32 val, offset;
496 unsigned long flags;
497
498 offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
499
500 spin_lock_irqsave(&sgpio->lock, flags);
501
502 val = readl(sgpio->chip.regs + offset);
503 val &= ~(SIRFSOC_GPIO_CTL_INTR_STS_MASK | SIRFSOC_GPIO_CTL_OUT_EN_MASK);
504
505 switch (type) {
506 case IRQ_TYPE_NONE:
507 break;
508 case IRQ_TYPE_EDGE_RISING:
509 val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK |
510 SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
511 val &= ~SIRFSOC_GPIO_CTL_INTR_LOW_MASK;
512 break;
513 case IRQ_TYPE_EDGE_FALLING:
514 val &= ~SIRFSOC_GPIO_CTL_INTR_HIGH_MASK;
515 val |= SIRFSOC_GPIO_CTL_INTR_LOW_MASK |
516 SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
517 break;
518 case IRQ_TYPE_EDGE_BOTH:
519 val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK |
520 SIRFSOC_GPIO_CTL_INTR_LOW_MASK |
521 SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
522 break;
523 case IRQ_TYPE_LEVEL_LOW:
524 val &= ~(SIRFSOC_GPIO_CTL_INTR_HIGH_MASK |
525 SIRFSOC_GPIO_CTL_INTR_TYPE_MASK);
526 val |= SIRFSOC_GPIO_CTL_INTR_LOW_MASK;
527 break;
528 case IRQ_TYPE_LEVEL_HIGH:
529 val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK;
530 val &= ~(SIRFSOC_GPIO_CTL_INTR_LOW_MASK |
531 SIRFSOC_GPIO_CTL_INTR_TYPE_MASK);
532 break;
533 }
534
535 writel(val, sgpio->chip.regs + offset);
536
537 spin_unlock_irqrestore(&sgpio->lock, flags);
538
539 return 0;
540}
541
542static struct irq_chip sirfsoc_irq_chip = {
543 .name = "sirf-gpio-irq",
544 .irq_ack = sirfsoc_gpio_irq_ack,
545 .irq_mask = sirfsoc_gpio_irq_mask,
546 .irq_unmask = sirfsoc_gpio_irq_unmask,
547 .irq_set_type = sirfsoc_gpio_irq_type,
548};
549
550static void sirfsoc_gpio_handle_irq(struct irq_desc *desc)
551{
552 unsigned int irq = irq_desc_get_irq(desc);
553 struct gpio_chip *gc = irq_desc_get_handler_data(desc);
554 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(gc);
555 struct sirfsoc_gpio_bank *bank;
556 u32 status, ctrl;
557 int idx = 0;
558 struct irq_chip *chip = irq_desc_get_chip(desc);
559 int i;
560
561 for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
562 bank = &sgpio->sgpio_bank[i];
563 if (bank->parent_irq == irq)
564 break;
565 }
566 BUG_ON(i == SIRFSOC_GPIO_NO_OF_BANKS);
567
568 chained_irq_enter(chip, desc);
569
570 status = readl(sgpio->chip.regs + SIRFSOC_GPIO_INT_STATUS(bank->id));
571 if (!status) {
572 printk(KERN_WARNING
573 "%s: gpio id %d status %#x no interrupt is flagged\n",
574 __func__, bank->id, status);
575 handle_bad_irq(desc);
576 return;
577 }
578
579 while (status) {
580 ctrl = readl(sgpio->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, idx));
581
582
583
584
585
586 if ((status & 0x1) && (ctrl & SIRFSOC_GPIO_CTL_INTR_EN_MASK)) {
587 pr_debug("%s: gpio id %d idx %d happens\n",
588 __func__, bank->id, idx);
589 generic_handle_irq(irq_find_mapping(gc->irq.domain, idx +
590 bank->id * SIRFSOC_GPIO_BANK_SIZE));
591 }
592
593 idx++;
594 status = status >> 1;
595 }
596
597 chained_irq_exit(chip, desc);
598}
599
600static inline void sirfsoc_gpio_set_input(struct sirfsoc_gpio_chip *sgpio,
601 unsigned ctrl_offset)
602{
603 u32 val;
604
605 val = readl(sgpio->chip.regs + ctrl_offset);
606 val &= ~SIRFSOC_GPIO_CTL_OUT_EN_MASK;
607 writel(val, sgpio->chip.regs + ctrl_offset);
608}
609
610static int sirfsoc_gpio_request(struct gpio_chip *chip, unsigned offset)
611{
612 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip);
613 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset);
614 unsigned long flags;
615
616 if (pinctrl_gpio_request(chip->base + offset))
617 return -ENODEV;
618
619 spin_lock_irqsave(&bank->lock, flags);
620
621
622
623
624
625 sirfsoc_gpio_set_input(sgpio, SIRFSOC_GPIO_CTRL(bank->id, offset));
626 __sirfsoc_gpio_irq_mask(sgpio, bank, offset);
627
628 spin_unlock_irqrestore(&bank->lock, flags);
629
630 return 0;
631}
632
633static void sirfsoc_gpio_free(struct gpio_chip *chip, unsigned offset)
634{
635 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip);
636 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset);
637 unsigned long flags;
638
639 spin_lock_irqsave(&bank->lock, flags);
640
641 __sirfsoc_gpio_irq_mask(sgpio, bank, offset);
642 sirfsoc_gpio_set_input(sgpio, SIRFSOC_GPIO_CTRL(bank->id, offset));
643
644 spin_unlock_irqrestore(&bank->lock, flags);
645
646 pinctrl_gpio_free(chip->base + offset);
647}
648
649static int sirfsoc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
650{
651 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip);
652 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, gpio);
653 int idx = sirfsoc_gpio_to_bankoff(gpio);
654 unsigned long flags;
655 unsigned offset;
656
657 offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
658
659 spin_lock_irqsave(&bank->lock, flags);
660
661 sirfsoc_gpio_set_input(sgpio, offset);
662
663 spin_unlock_irqrestore(&bank->lock, flags);
664
665 return 0;
666}
667
668static inline void sirfsoc_gpio_set_output(struct sirfsoc_gpio_chip *sgpio,
669 struct sirfsoc_gpio_bank *bank,
670 unsigned offset,
671 int value)
672{
673 u32 out_ctrl;
674 unsigned long flags;
675
676 spin_lock_irqsave(&bank->lock, flags);
677
678 out_ctrl = readl(sgpio->chip.regs + offset);
679 if (value)
680 out_ctrl |= SIRFSOC_GPIO_CTL_DATAOUT_MASK;
681 else
682 out_ctrl &= ~SIRFSOC_GPIO_CTL_DATAOUT_MASK;
683
684 out_ctrl &= ~SIRFSOC_GPIO_CTL_INTR_EN_MASK;
685 out_ctrl |= SIRFSOC_GPIO_CTL_OUT_EN_MASK;
686 writel(out_ctrl, sgpio->chip.regs + offset);
687
688 spin_unlock_irqrestore(&bank->lock, flags);
689}
690
691static int sirfsoc_gpio_direction_output(struct gpio_chip *chip,
692 unsigned gpio, int value)
693{
694 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip);
695 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, gpio);
696 int idx = sirfsoc_gpio_to_bankoff(gpio);
697 u32 offset;
698 unsigned long flags;
699
700 offset = SIRFSOC_GPIO_CTRL(bank->id, idx);
701
702 spin_lock_irqsave(&sgpio->lock, flags);
703
704 sirfsoc_gpio_set_output(sgpio, bank, offset, value);
705
706 spin_unlock_irqrestore(&sgpio->lock, flags);
707
708 return 0;
709}
710
711static int sirfsoc_gpio_get_value(struct gpio_chip *chip, unsigned offset)
712{
713 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip);
714 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset);
715 u32 val;
716 unsigned long flags;
717
718 spin_lock_irqsave(&bank->lock, flags);
719
720 val = readl(sgpio->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));
721
722 spin_unlock_irqrestore(&bank->lock, flags);
723
724 return !!(val & SIRFSOC_GPIO_CTL_DATAIN_MASK);
725}
726
727static void sirfsoc_gpio_set_value(struct gpio_chip *chip, unsigned offset,
728 int value)
729{
730 struct sirfsoc_gpio_chip *sgpio = gpiochip_get_data(chip);
731 struct sirfsoc_gpio_bank *bank = sirfsoc_gpio_to_bank(sgpio, offset);
732 u32 ctrl;
733 unsigned long flags;
734
735 spin_lock_irqsave(&bank->lock, flags);
736
737 ctrl = readl(sgpio->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));
738 if (value)
739 ctrl |= SIRFSOC_GPIO_CTL_DATAOUT_MASK;
740 else
741 ctrl &= ~SIRFSOC_GPIO_CTL_DATAOUT_MASK;
742 writel(ctrl, sgpio->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));
743
744 spin_unlock_irqrestore(&bank->lock, flags);
745}
746
747static void sirfsoc_gpio_set_pullup(struct sirfsoc_gpio_chip *sgpio,
748 const u32 *pullups)
749{
750 int i, n;
751 const unsigned long *p = (const unsigned long *)pullups;
752
753 for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
754 for_each_set_bit(n, p + i, BITS_PER_LONG) {
755 u32 offset = SIRFSOC_GPIO_CTRL(i, n);
756 u32 val = readl(sgpio->chip.regs + offset);
757 val |= SIRFSOC_GPIO_CTL_PULL_MASK;
758 val |= SIRFSOC_GPIO_CTL_PULL_HIGH;
759 writel(val, sgpio->chip.regs + offset);
760 }
761 }
762}
763
764static void sirfsoc_gpio_set_pulldown(struct sirfsoc_gpio_chip *sgpio,
765 const u32 *pulldowns)
766{
767 int i, n;
768 const unsigned long *p = (const unsigned long *)pulldowns;
769
770 for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
771 for_each_set_bit(n, p + i, BITS_PER_LONG) {
772 u32 offset = SIRFSOC_GPIO_CTRL(i, n);
773 u32 val = readl(sgpio->chip.regs + offset);
774 val |= SIRFSOC_GPIO_CTL_PULL_MASK;
775 val &= ~SIRFSOC_GPIO_CTL_PULL_HIGH;
776 writel(val, sgpio->chip.regs + offset);
777 }
778 }
779}
780
781static int sirfsoc_gpio_probe(struct device_node *np)
782{
783 int i, err = 0;
784 struct sirfsoc_gpio_chip *sgpio;
785 struct sirfsoc_gpio_bank *bank;
786 void __iomem *regs;
787 struct platform_device *pdev;
788 struct gpio_irq_chip *girq;
789
790 u32 pullups[SIRFSOC_GPIO_NO_OF_BANKS], pulldowns[SIRFSOC_GPIO_NO_OF_BANKS];
791
792 pdev = of_find_device_by_node(np);
793 if (!pdev)
794 return -ENODEV;
795
796 sgpio = devm_kzalloc(&pdev->dev, sizeof(*sgpio), GFP_KERNEL);
797 if (!sgpio)
798 return -ENOMEM;
799 spin_lock_init(&sgpio->lock);
800
801 regs = of_iomap(np, 0);
802 if (!regs)
803 return -ENOMEM;
804
805 sgpio->chip.gc.request = sirfsoc_gpio_request;
806 sgpio->chip.gc.free = sirfsoc_gpio_free;
807 sgpio->chip.gc.direction_input = sirfsoc_gpio_direction_input;
808 sgpio->chip.gc.get = sirfsoc_gpio_get_value;
809 sgpio->chip.gc.direction_output = sirfsoc_gpio_direction_output;
810 sgpio->chip.gc.set = sirfsoc_gpio_set_value;
811 sgpio->chip.gc.base = 0;
812 sgpio->chip.gc.ngpio = SIRFSOC_GPIO_BANK_SIZE * SIRFSOC_GPIO_NO_OF_BANKS;
813 sgpio->chip.gc.label = kasprintf(GFP_KERNEL, "%pOF", np);
814 sgpio->chip.gc.of_node = np;
815 sgpio->chip.gc.of_xlate = sirfsoc_gpio_of_xlate;
816 sgpio->chip.gc.of_gpio_n_cells = 2;
817 sgpio->chip.gc.parent = &pdev->dev;
818 sgpio->chip.regs = regs;
819
820 girq = &sgpio->chip.gc.irq;
821 girq->chip = &sirfsoc_irq_chip;
822 girq->parent_handler = sirfsoc_gpio_handle_irq;
823 girq->num_parents = SIRFSOC_GPIO_NO_OF_BANKS;
824 girq->parents = devm_kcalloc(&pdev->dev, SIRFSOC_GPIO_NO_OF_BANKS,
825 sizeof(*girq->parents),
826 GFP_KERNEL);
827 if (!girq->parents)
828 return -ENOMEM;
829 for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
830 bank = &sgpio->sgpio_bank[i];
831 spin_lock_init(&bank->lock);
832 bank->parent_irq = platform_get_irq(pdev, i);
833 if (bank->parent_irq < 0) {
834 err = bank->parent_irq;
835 goto out;
836 }
837 girq->parents[i] = bank->parent_irq;
838 }
839 girq->default_type = IRQ_TYPE_NONE;
840 girq->handler = handle_level_irq;
841
842 err = gpiochip_add_data(&sgpio->chip.gc, sgpio);
843 if (err) {
844 dev_err(&pdev->dev, "%pOF: error in probe function with status %d\n",
845 np, err);
846 goto out;
847 }
848
849 err = gpiochip_add_pin_range(&sgpio->chip.gc, dev_name(&pdev->dev),
850 0, 0, SIRFSOC_GPIO_BANK_SIZE * SIRFSOC_GPIO_NO_OF_BANKS);
851 if (err) {
852 dev_err(&pdev->dev,
853 "could not add gpiochip pin range\n");
854 goto out_no_range;
855 }
856
857 if (!of_property_read_u32_array(np, "sirf,pullups", pullups,
858 SIRFSOC_GPIO_NO_OF_BANKS))
859 sirfsoc_gpio_set_pullup(sgpio, pullups);
860
861 if (!of_property_read_u32_array(np, "sirf,pulldowns", pulldowns,
862 SIRFSOC_GPIO_NO_OF_BANKS))
863 sirfsoc_gpio_set_pulldown(sgpio, pulldowns);
864
865 return 0;
866
867out_no_range:
868 gpiochip_remove(&sgpio->chip.gc);
869out:
870 iounmap(regs);
871 return err;
872}
873
874static int __init sirfsoc_gpio_init(void)
875{
876
877 struct device_node *np;
878
879 np = of_find_matching_node(NULL, pinmux_ids);
880
881 if (!np)
882 return -ENODEV;
883
884 return sirfsoc_gpio_probe(np);
885}
886subsys_initcall(sirfsoc_gpio_init);
887
