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28#include <linux/err.h>
29#include <linux/io.h>
30#include <linux/of.h>
31#include <linux/pinctrl/pinconf.h>
32#include <linux/pinctrl/pinconf-generic.h>
33#include <linux/pinctrl/pinctrl.h>
34#include <linux/pinctrl/pinmux.h>
35#include <linux/platform_device.h>
36#include <linux/slab.h>
37
38#include "../core.h"
39#include "../pinctrl-utils.h"
40
41#define NSP_MUX_BASE0 0x00
42#define NSP_MUX_BASE1 0x01
43#define NSP_MUX_BASE2 0x02
44
45
46
47
48
49
50
51
52struct nsp_mux {
53 unsigned int base;
54 unsigned int shift;
55 unsigned int mask;
56 unsigned int alt;
57};
58
59
60
61
62
63
64
65
66struct nsp_mux_log {
67 struct nsp_mux mux;
68 bool is_configured;
69};
70
71
72
73
74
75
76
77
78
79struct nsp_pin_group {
80 const char *name;
81 const unsigned int *pins;
82 const unsigned int num_pins;
83 const struct nsp_mux mux;
84};
85
86
87
88
89
90
91
92
93struct nsp_pin_function {
94 const char *name;
95 const char * const *groups;
96 const unsigned int num_groups;
97};
98
99
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111
112
113
114struct nsp_pinctrl {
115 struct pinctrl_dev *pctl;
116 struct device *dev;
117 void __iomem *base0;
118 void __iomem *base1;
119 void __iomem *base2;
120 const struct nsp_pin_group *groups;
121 unsigned int num_groups;
122 const struct nsp_pin_function *functions;
123 unsigned int num_functions;
124 struct nsp_mux_log *mux_log;
125 spinlock_t lock;
126};
127
128
129
130
131
132
133
134
135struct nsp_pin {
136 unsigned int pin;
137 char *name;
138 unsigned int gpio_select;
139};
140
141#define NSP_PIN_DESC(p, n, g) \
142{ \
143 .pin = p, \
144 .name = n, \
145 .gpio_select = g, \
146}
147
148
149
150
151static struct nsp_pin nsp_pins[] = {
152 NSP_PIN_DESC(0, "spi_clk", 1),
153 NSP_PIN_DESC(1, "spi_ss", 1),
154 NSP_PIN_DESC(2, "spi_mosi", 1),
155 NSP_PIN_DESC(3, "spi_miso", 1),
156 NSP_PIN_DESC(4, "scl", 1),
157 NSP_PIN_DESC(5, "sda", 1),
158 NSP_PIN_DESC(6, "mdc", 1),
159 NSP_PIN_DESC(7, "mdio", 1),
160 NSP_PIN_DESC(8, "pwm0", 1),
161 NSP_PIN_DESC(9, "pwm1", 1),
162 NSP_PIN_DESC(10, "pwm2", 1),
163 NSP_PIN_DESC(11, "pwm3", 1),
164 NSP_PIN_DESC(12, "uart1_rx", 1),
165 NSP_PIN_DESC(13, "uart1_tx", 1),
166 NSP_PIN_DESC(14, "uart1_cts", 1),
167 NSP_PIN_DESC(15, "uart1_rts", 1),
168 NSP_PIN_DESC(16, "uart2_rx", 1),
169 NSP_PIN_DESC(17, "uart2_tx", 1),
170 NSP_PIN_DESC(18, "synce", 0),
171 NSP_PIN_DESC(19, "sata0_led", 0),
172 NSP_PIN_DESC(20, "sata1_led", 0),
173 NSP_PIN_DESC(21, "xtal_out", 1),
174 NSP_PIN_DESC(22, "sdio_pwr", 1),
175 NSP_PIN_DESC(23, "sdio_en_1p8v", 1),
176 NSP_PIN_DESC(24, "gpio_24", 1),
177 NSP_PIN_DESC(25, "gpio_25", 1),
178 NSP_PIN_DESC(26, "p5_led0", 0),
179 NSP_PIN_DESC(27, "p5_led1", 0),
180 NSP_PIN_DESC(28, "gpio_28", 1),
181 NSP_PIN_DESC(29, "gpio_29", 1),
182 NSP_PIN_DESC(30, "gpio_30", 1),
183 NSP_PIN_DESC(31, "gpio_31", 1),
184 NSP_PIN_DESC(32, "nand_ale", 0),
185 NSP_PIN_DESC(33, "nand_ce0", 0),
186 NSP_PIN_DESC(34, "nand_r/b", 0),
187 NSP_PIN_DESC(35, "nand_dq0", 0),
188 NSP_PIN_DESC(36, "nand_dq1", 0),
189 NSP_PIN_DESC(37, "nand_dq2", 0),
190 NSP_PIN_DESC(38, "nand_dq3", 0),
191 NSP_PIN_DESC(39, "nand_dq4", 0),
192 NSP_PIN_DESC(40, "nand_dq5", 0),
193 NSP_PIN_DESC(41, "nand_dq6", 0),
194 NSP_PIN_DESC(42, "nand_dq7", 0),
195};
196
197
198
199
200
201static const unsigned int spi_pins[] = {0, 1, 2, 3};
202static const unsigned int i2c_pins[] = {4, 5};
203static const unsigned int mdio_pins[] = {6, 7};
204static const unsigned int pwm0_pins[] = {8};
205static const unsigned int gpio_b_0_pins[] = {8};
206static const unsigned int pwm1_pins[] = {9};
207static const unsigned int gpio_b_1_pins[] = {9};
208static const unsigned int pwm2_pins[] = {10};
209static const unsigned int gpio_b_2_pins[] = {10};
210static const unsigned int pwm3_pins[] = {11};
211static const unsigned int gpio_b_3_pins[] = {11};
212static const unsigned int uart1_pins[] = {12, 13, 14, 15};
213static const unsigned int uart2_pins[] = {16, 17};
214static const unsigned int synce_pins[] = {18};
215static const unsigned int sata0_led_pins[] = {19};
216static const unsigned int sata1_led_pins[] = {20};
217static const unsigned int xtal_out_pins[] = {21};
218static const unsigned int sdio_pwr_pins[] = {22};
219static const unsigned int sdio_1p8v_pins[] = {23};
220static const unsigned int switch_p05_led0_pins[] = {26};
221static const unsigned int switch_p05_led1_pins[] = {27};
222static const unsigned int nand_pins[] = {32, 33, 34, 35, 36, 37, 38, 39,
223 40, 41, 42};
224static const unsigned int emmc_pins[] = {32, 33, 34, 35, 36, 37, 38, 39,
225 40, 41, 42};
226
227#define NSP_PIN_GROUP(group_name, ba, sh, ma, al) \
228{ \
229 .name = __stringify(group_name) "_grp", \
230 .pins = group_name ## _pins, \
231 .num_pins = ARRAY_SIZE(group_name ## _pins), \
232 .mux = { \
233 .base = ba, \
234 .shift = sh, \
235 .mask = ma, \
236 .alt = al, \
237 } \
238}
239
240
241
242
243static const struct nsp_pin_group nsp_pin_groups[] = {
244 NSP_PIN_GROUP(spi, NSP_MUX_BASE0, 0, 0x0f, 0x00),
245 NSP_PIN_GROUP(i2c, NSP_MUX_BASE0, 3, 0x03, 0x00),
246 NSP_PIN_GROUP(mdio, NSP_MUX_BASE0, 5, 0x03, 0x00),
247 NSP_PIN_GROUP(gpio_b_0, NSP_MUX_BASE0, 7, 0x01, 0x00),
248 NSP_PIN_GROUP(pwm0, NSP_MUX_BASE1, 0, 0x01, 0x01),
249 NSP_PIN_GROUP(gpio_b_1, NSP_MUX_BASE0, 8, 0x01, 0x00),
250 NSP_PIN_GROUP(pwm1, NSP_MUX_BASE1, 1, 0x01, 0x01),
251 NSP_PIN_GROUP(gpio_b_2, NSP_MUX_BASE0, 9, 0x01, 0x00),
252 NSP_PIN_GROUP(pwm2, NSP_MUX_BASE1, 2, 0x01, 0x01),
253 NSP_PIN_GROUP(gpio_b_3, NSP_MUX_BASE0, 10, 0x01, 0x00),
254 NSP_PIN_GROUP(pwm3, NSP_MUX_BASE1, 3, 0x01, 0x01),
255 NSP_PIN_GROUP(uart1, NSP_MUX_BASE0, 11, 0x0f, 0x00),
256 NSP_PIN_GROUP(uart2, NSP_MUX_BASE0, 15, 0x03, 0x00),
257 NSP_PIN_GROUP(synce, NSP_MUX_BASE0, 17, 0x01, 0x01),
258 NSP_PIN_GROUP(sata0_led, NSP_MUX_BASE0, 18, 0x01, 0x01),
259 NSP_PIN_GROUP(sata1_led, NSP_MUX_BASE0, 19, 0x01, 0x01),
260 NSP_PIN_GROUP(xtal_out, NSP_MUX_BASE0, 20, 0x01, 0x00),
261 NSP_PIN_GROUP(sdio_pwr, NSP_MUX_BASE0, 21, 0x01, 0x00),
262 NSP_PIN_GROUP(sdio_1p8v, NSP_MUX_BASE0, 22, 0x01, 0x00),
263 NSP_PIN_GROUP(switch_p05_led0, NSP_MUX_BASE0, 26, 0x01, 0x01),
264 NSP_PIN_GROUP(switch_p05_led1, NSP_MUX_BASE0, 27, 0x01, 0x01),
265 NSP_PIN_GROUP(nand, NSP_MUX_BASE2, 0, 0x01, 0x00),
266 NSP_PIN_GROUP(emmc, NSP_MUX_BASE2, 0, 0x01, 0x01)
267};
268
269
270
271
272
273static const char * const spi_grps[] = {"spi_grp"};
274static const char * const i2c_grps[] = {"i2c_grp"};
275static const char * const mdio_grps[] = {"mdio_grp"};
276static const char * const pwm_grps[] = {"pwm0_grp", "pwm1_grp", "pwm2_grp"
277 , "pwm3_grp"};
278static const char * const gpio_b_grps[] = {"gpio_b_0_grp", "gpio_b_1_grp",
279 "gpio_b_2_grp", "gpio_b_3_grp"};
280static const char * const uart1_grps[] = {"uart1_grp"};
281static const char * const uart2_grps[] = {"uart2_grp"};
282static const char * const synce_grps[] = {"synce_grp"};
283static const char * const sata_led_grps[] = {"sata0_led_grp", "sata1_led_grp"};
284static const char * const xtal_out_grps[] = {"xtal_out_grp"};
285static const char * const sdio_grps[] = {"sdio_pwr_grp", "sdio_1p8v_grp"};
286static const char * const switch_led_grps[] = {"switch_p05_led0_grp",
287 "switch_p05_led1_grp"};
288static const char * const nand_grps[] = {"nand_grp"};
289static const char * const emmc_grps[] = {"emmc_grp"};
290
291#define NSP_PIN_FUNCTION(func) \
292{ \
293 .name = #func, \
294 .groups = func ## _grps, \
295 .num_groups = ARRAY_SIZE(func ## _grps), \
296}
297
298
299
300
301static const struct nsp_pin_function nsp_pin_functions[] = {
302 NSP_PIN_FUNCTION(spi),
303 NSP_PIN_FUNCTION(i2c),
304 NSP_PIN_FUNCTION(mdio),
305 NSP_PIN_FUNCTION(pwm),
306 NSP_PIN_FUNCTION(gpio_b),
307 NSP_PIN_FUNCTION(uart1),
308 NSP_PIN_FUNCTION(uart2),
309 NSP_PIN_FUNCTION(synce),
310 NSP_PIN_FUNCTION(sata_led),
311 NSP_PIN_FUNCTION(xtal_out),
312 NSP_PIN_FUNCTION(sdio),
313 NSP_PIN_FUNCTION(switch_led),
314 NSP_PIN_FUNCTION(nand),
315 NSP_PIN_FUNCTION(emmc)
316};
317
318static int nsp_get_groups_count(struct pinctrl_dev *pctrl_dev)
319{
320 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
321
322 return pinctrl->num_groups;
323}
324
325static const char *nsp_get_group_name(struct pinctrl_dev *pctrl_dev,
326 unsigned int selector)
327{
328 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
329
330 return pinctrl->groups[selector].name;
331}
332
333static int nsp_get_group_pins(struct pinctrl_dev *pctrl_dev,
334 unsigned int selector, const unsigned int **pins,
335 unsigned int *num_pins)
336{
337 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
338
339 *pins = pinctrl->groups[selector].pins;
340 *num_pins = pinctrl->groups[selector].num_pins;
341
342 return 0;
343}
344
345static void nsp_pin_dbg_show(struct pinctrl_dev *pctrl_dev,
346 struct seq_file *s, unsigned int offset)
347{
348 seq_printf(s, " %s", dev_name(pctrl_dev->dev));
349}
350
351static const struct pinctrl_ops nsp_pinctrl_ops = {
352 .get_groups_count = nsp_get_groups_count,
353 .get_group_name = nsp_get_group_name,
354 .get_group_pins = nsp_get_group_pins,
355 .pin_dbg_show = nsp_pin_dbg_show,
356 .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
357 .dt_free_map = pinctrl_utils_free_map,
358};
359
360static int nsp_get_functions_count(struct pinctrl_dev *pctrl_dev)
361{
362 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
363
364 return pinctrl->num_functions;
365}
366
367static const char *nsp_get_function_name(struct pinctrl_dev *pctrl_dev,
368 unsigned int selector)
369{
370 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
371
372 return pinctrl->functions[selector].name;
373}
374
375static int nsp_get_function_groups(struct pinctrl_dev *pctrl_dev,
376 unsigned int selector,
377 const char * const **groups,
378 unsigned * const num_groups)
379{
380 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
381
382 *groups = pinctrl->functions[selector].groups;
383 *num_groups = pinctrl->functions[selector].num_groups;
384
385 return 0;
386}
387
388static int nsp_pinmux_set(struct nsp_pinctrl *pinctrl,
389 const struct nsp_pin_function *func,
390 const struct nsp_pin_group *grp,
391 struct nsp_mux_log *mux_log)
392{
393 const struct nsp_mux *mux = &grp->mux;
394 int i;
395 u32 val, mask;
396 unsigned long flags;
397 void __iomem *base_address;
398
399 for (i = 0; i < pinctrl->num_groups; i++) {
400 if ((mux->shift != mux_log[i].mux.shift) ||
401 (mux->base != mux_log[i].mux.base))
402 continue;
403
404
405 if (!mux_log[i].is_configured)
406 break;
407
408
409
410
411
412 if (mux_log[i].mux.alt != mux->alt) {
413 dev_err(pinctrl->dev,
414 "double configuration error detected!\n");
415 dev_err(pinctrl->dev, "func:%s grp:%s\n",
416 func->name, grp->name);
417 return -EINVAL;
418 }
419
420 return 0;
421 }
422 if (i == pinctrl->num_groups)
423 return -EINVAL;
424
425 mask = mux->mask;
426 mux_log[i].mux.alt = mux->alt;
427 mux_log[i].is_configured = true;
428
429 switch (mux->base) {
430 case NSP_MUX_BASE0:
431 base_address = pinctrl->base0;
432 break;
433
434 case NSP_MUX_BASE1:
435 base_address = pinctrl->base1;
436 break;
437
438 case NSP_MUX_BASE2:
439 base_address = pinctrl->base2;
440 break;
441
442 default:
443 return -EINVAL;
444 }
445
446 spin_lock_irqsave(&pinctrl->lock, flags);
447 val = readl(base_address);
448 val &= ~(mask << grp->mux.shift);
449 val |= grp->mux.alt << grp->mux.shift;
450 writel(val, base_address);
451 spin_unlock_irqrestore(&pinctrl->lock, flags);
452
453 return 0;
454}
455
456static int nsp_pinmux_enable(struct pinctrl_dev *pctrl_dev,
457 unsigned int func_select, unsigned int grp_select)
458{
459 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
460 const struct nsp_pin_function *func;
461 const struct nsp_pin_group *grp;
462
463 if (grp_select >= pinctrl->num_groups ||
464 func_select >= pinctrl->num_functions)
465 return -EINVAL;
466
467 func = &pinctrl->functions[func_select];
468 grp = &pinctrl->groups[grp_select];
469
470 dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
471 func_select, func->name, grp_select, grp->name);
472
473 dev_dbg(pctrl_dev->dev, "shift:%u alt:%u\n", grp->mux.shift,
474 grp->mux.alt);
475
476 return nsp_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
477}
478
479
480static int nsp_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
481 struct pinctrl_gpio_range *range,
482 unsigned int pin)
483{
484 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
485 u32 *gpio_select = pctrl_dev->desc->pins[pin].drv_data;
486 u32 val;
487 unsigned long flags;
488
489 spin_lock_irqsave(&pinctrl->lock, flags);
490 val = readl(pinctrl->base0);
491 if ((val & BIT(pin)) != (*gpio_select << pin)) {
492 val &= ~BIT(pin);
493 val |= *gpio_select << pin;
494 writel(val, pinctrl->base0);
495 }
496 spin_unlock_irqrestore(&pinctrl->lock, flags);
497
498 return 0;
499}
500
501static void nsp_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
502 struct pinctrl_gpio_range *range,
503 unsigned int pin)
504{
505 struct nsp_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
506 u32 *gpio_select = pctrl_dev->desc->pins[pin].drv_data;
507 u32 val;
508 unsigned long flags;
509
510 spin_lock_irqsave(&pinctrl->lock, flags);
511 val = readl(pinctrl->base0);
512 if ((val & (1 << pin)) == (*gpio_select << pin)) {
513 val &= ~(1 << pin);
514 if (!(*gpio_select))
515 val |= (1 << pin);
516 writel(val, pinctrl->base0);
517 }
518 spin_unlock_irqrestore(&pinctrl->lock, flags);
519}
520
521static const struct pinmux_ops nsp_pinmux_ops = {
522 .get_functions_count = nsp_get_functions_count,
523 .get_function_name = nsp_get_function_name,
524 .get_function_groups = nsp_get_function_groups,
525 .set_mux = nsp_pinmux_enable,
526 .gpio_request_enable = nsp_gpio_request_enable,
527 .gpio_disable_free = nsp_gpio_disable_free,
528};
529
530static struct pinctrl_desc nsp_pinctrl_desc = {
531 .name = "nsp-pinmux",
532 .pctlops = &nsp_pinctrl_ops,
533 .pmxops = &nsp_pinmux_ops,
534};
535
536static int nsp_mux_log_init(struct nsp_pinctrl *pinctrl)
537{
538 struct nsp_mux_log *log;
539 unsigned int i;
540 u32 no_of_groups = ARRAY_SIZE(nsp_pin_groups);
541
542 pinctrl->mux_log = devm_kcalloc(pinctrl->dev, no_of_groups,
543 sizeof(struct nsp_mux_log),
544 GFP_KERNEL);
545 if (!pinctrl->mux_log)
546 return -ENOMEM;
547
548 for (i = 0; i < no_of_groups; i++) {
549 log = &pinctrl->mux_log[i];
550 log->mux.base = nsp_pin_groups[i].mux.base;
551 log->mux.shift = nsp_pin_groups[i].mux.shift;
552 log->mux.alt = 0;
553 log->is_configured = false;
554 }
555
556 return 0;
557}
558
559static int nsp_pinmux_probe(struct platform_device *pdev)
560{
561 struct nsp_pinctrl *pinctrl;
562 struct resource *res;
563 int i, ret;
564 struct pinctrl_pin_desc *pins;
565 unsigned int num_pins = ARRAY_SIZE(nsp_pins);
566
567 pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
568 if (!pinctrl)
569 return -ENOMEM;
570 pinctrl->dev = &pdev->dev;
571 platform_set_drvdata(pdev, pinctrl);
572 spin_lock_init(&pinctrl->lock);
573
574 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
575 pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
576 if (IS_ERR(pinctrl->base0))
577 return PTR_ERR(pinctrl->base0);
578
579 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
580 if (!res)
581 return -EINVAL;
582 pinctrl->base1 = devm_ioremap_nocache(&pdev->dev, res->start,
583 resource_size(res));
584 if (!pinctrl->base1) {
585 dev_err(&pdev->dev, "unable to map I/O space\n");
586 return -ENOMEM;
587 }
588
589 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
590 pinctrl->base2 = devm_ioremap_resource(&pdev->dev, res);
591 if (IS_ERR(pinctrl->base2))
592 return PTR_ERR(pinctrl->base2);
593
594 ret = nsp_mux_log_init(pinctrl);
595 if (ret) {
596 dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
597 return ret;
598 }
599
600 pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
601 if (!pins)
602 return -ENOMEM;
603
604 for (i = 0; i < num_pins; i++) {
605 pins[i].number = nsp_pins[i].pin;
606 pins[i].name = nsp_pins[i].name;
607 pins[i].drv_data = &nsp_pins[i].gpio_select;
608 }
609
610 pinctrl->groups = nsp_pin_groups;
611 pinctrl->num_groups = ARRAY_SIZE(nsp_pin_groups);
612 pinctrl->functions = nsp_pin_functions;
613 pinctrl->num_functions = ARRAY_SIZE(nsp_pin_functions);
614 nsp_pinctrl_desc.pins = pins;
615 nsp_pinctrl_desc.npins = num_pins;
616
617 pinctrl->pctl = devm_pinctrl_register(&pdev->dev, &nsp_pinctrl_desc,
618 pinctrl);
619 if (IS_ERR(pinctrl->pctl)) {
620 dev_err(&pdev->dev, "unable to register nsp IOMUX pinctrl\n");
621 return PTR_ERR(pinctrl->pctl);
622 }
623
624 return 0;
625}
626
627static const struct of_device_id nsp_pinmux_of_match[] = {
628 { .compatible = "brcm,nsp-pinmux" },
629 { }
630};
631
632static struct platform_driver nsp_pinmux_driver = {
633 .driver = {
634 .name = "nsp-pinmux",
635 .of_match_table = nsp_pinmux_of_match,
636 },
637 .probe = nsp_pinmux_probe,
638};
639
640static int __init nsp_pinmux_init(void)
641{
642 return platform_driver_register(&nsp_pinmux_driver);
643}
644arch_initcall(nsp_pinmux_init);
645
