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dm: Rename dev_addr..() functions
[people/ms/u-boot.git] / drivers / pinctrl / mvebu / pinctrl-armada-37xx.c
1 /*
2 * U-Boot Marvell 37xx SoC pinctrl driver
3 *
4 * Copyright (C) 2017 Stefan Roese <sr@denx.de>
5 *
6 * This driver is based on the Linux driver version, which is:
7 * Copyright (C) 2017 Marvell
8 * Gregory CLEMENT <gregory.clement@free-electrons.com>
9 *
10 * Additionally parts are derived from the Meson U-Boot pinctrl driver,
11 * which is:
12 * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
13 * Based on code from Linux kernel:
14 * Copyright (C) 2016 Endless Mobile, Inc.
15 *
16 * SPDX-License-Identifier: GPL-2.0+
17 * https://spdx.org/licenses
18 */
19
20 #include <common.h>
21 #include <config.h>
22 #include <dm.h>
23 #include <dm/device-internal.h>
24 #include <dm/lists.h>
25 #include <dm/pinctrl.h>
26 #include <dm/root.h>
27 #include <errno.h>
28 #include <fdtdec.h>
29 #include <regmap.h>
30 #include <asm/gpio.h>
31 #include <asm/system.h>
32 #include <asm/io.h>
33
34 DECLARE_GLOBAL_DATA_PTR;
35
36 #define OUTPUT_EN 0x0
37 #define INPUT_VAL 0x10
38 #define OUTPUT_VAL 0x18
39 #define OUTPUT_CTL 0x20
40 #define SELECTION 0x30
41
42 #define IRQ_EN 0x0
43 #define IRQ_POL 0x08
44 #define IRQ_STATUS 0x10
45 #define IRQ_WKUP 0x18
46
47 #define NB_FUNCS 2
48 #define GPIO_PER_REG 32
49
50 /**
51 * struct armada_37xx_pin_group: represents group of pins of a pinmux function.
52 * The pins of a pinmux groups are composed of one or two groups of contiguous
53 * pins.
54 * @name: Name of the pin group, used to lookup the group.
55 * @start_pins: Index of the first pin of the main range of pins belonging to
56 * the group
57 * @npins: Number of pins included in the first range
58 * @reg_mask: Bit mask matching the group in the selection register
59 * @extra_pins: Index of the first pin of the optional second range of pins
60 * belonging to the group
61 * @npins: Number of pins included in the second optional range
62 * @funcs: A list of pinmux functions that can be selected for this group.
63 * @pins: List of the pins included in the group
64 */
65 struct armada_37xx_pin_group {
66 const char *name;
67 unsigned int start_pin;
68 unsigned int npins;
69 u32 reg_mask;
70 u32 val[NB_FUNCS];
71 unsigned int extra_pin;
72 unsigned int extra_npins;
73 const char *funcs[NB_FUNCS];
74 unsigned int *pins;
75 };
76
77 struct armada_37xx_pin_data {
78 u8 nr_pins;
79 char *name;
80 struct armada_37xx_pin_group *groups;
81 int ngroups;
82 };
83
84 struct armada_37xx_pmx_func {
85 const char *name;
86 const char **groups;
87 unsigned int ngroups;
88 };
89
90 struct armada_37xx_pinctrl {
91 void __iomem *base;
92 const struct armada_37xx_pin_data *data;
93 struct udevice *dev;
94 struct pinctrl_dev *pctl_dev;
95 struct armada_37xx_pin_group *groups;
96 unsigned int ngroups;
97 struct armada_37xx_pmx_func *funcs;
98 unsigned int nfuncs;
99 };
100
101 #define PIN_GRP(_name, _start, _nr, _mask, _func1, _func2) \
102 { \
103 .name = _name, \
104 .start_pin = _start, \
105 .npins = _nr, \
106 .reg_mask = _mask, \
107 .val = {0, _mask}, \
108 .funcs = {_func1, _func2} \
109 }
110
111 #define PIN_GRP_GPIO(_name, _start, _nr, _mask, _func1) \
112 { \
113 .name = _name, \
114 .start_pin = _start, \
115 .npins = _nr, \
116 .reg_mask = _mask, \
117 .val = {0, _mask}, \
118 .funcs = {_func1, "gpio"} \
119 }
120
121 #define PIN_GRP_GPIO_2(_name, _start, _nr, _mask, _val1, _val2, _func1) \
122 { \
123 .name = _name, \
124 .start_pin = _start, \
125 .npins = _nr, \
126 .reg_mask = _mask, \
127 .val = {_val1, _val2}, \
128 .funcs = {_func1, "gpio"} \
129 }
130
131 #define PIN_GRP_EXTRA(_name, _start, _nr, _mask, _v1, _v2, _start2, _nr2, \
132 _f1, _f2) \
133 { \
134 .name = _name, \
135 .start_pin = _start, \
136 .npins = _nr, \
137 .reg_mask = _mask, \
138 .val = {_v1, _v2}, \
139 .extra_pin = _start2, \
140 .extra_npins = _nr2, \
141 .funcs = {_f1, _f2} \
142 }
143
144 static struct armada_37xx_pin_group armada_37xx_nb_groups[] = {
145 PIN_GRP_GPIO("jtag", 20, 5, BIT(0), "jtag"),
146 PIN_GRP_GPIO("sdio0", 8, 3, BIT(1), "sdio"),
147 PIN_GRP_GPIO("emmc_nb", 27, 9, BIT(2), "emmc"),
148 PIN_GRP_GPIO("pwm0", 11, 1, BIT(3), "pwm"),
149 PIN_GRP_GPIO("pwm1", 12, 1, BIT(4), "pwm"),
150 PIN_GRP_GPIO("pwm2", 13, 1, BIT(5), "pwm"),
151 PIN_GRP_GPIO("pwm3", 14, 1, BIT(6), "pwm"),
152 PIN_GRP_GPIO("pmic1", 17, 1, BIT(7), "pmic"),
153 PIN_GRP_GPIO("pmic0", 16, 1, BIT(8), "pmic"),
154 PIN_GRP_GPIO("i2c2", 2, 2, BIT(9), "i2c"),
155 PIN_GRP_GPIO("i2c1", 0, 2, BIT(10), "i2c"),
156 PIN_GRP_GPIO("spi_cs1", 17, 1, BIT(12), "spi"),
157 PIN_GRP_GPIO_2("spi_cs2", 18, 1, BIT(13) | BIT(19), 0, BIT(13), "spi"),
158 PIN_GRP_GPIO_2("spi_cs3", 19, 1, BIT(14) | BIT(19), 0, BIT(14), "spi"),
159 PIN_GRP_GPIO("onewire", 4, 1, BIT(16), "onewire"),
160 PIN_GRP_GPIO("uart1", 25, 2, BIT(17), "uart"),
161 PIN_GRP_GPIO("spi_quad", 15, 2, BIT(18), "spi"),
162 PIN_GRP_EXTRA("uart2", 9, 2, BIT(13) | BIT(14) | BIT(19),
163 BIT(13) | BIT(14), BIT(19), 18, 2, "gpio", "uart"),
164 PIN_GRP_GPIO("led0_od", 11, 1, BIT(20), "led"),
165 PIN_GRP_GPIO("led1_od", 12, 1, BIT(21), "led"),
166 PIN_GRP_GPIO("led2_od", 13, 1, BIT(22), "led"),
167 PIN_GRP_GPIO("led3_od", 14, 1, BIT(23), "led"),
168
169 };
170
171 static struct armada_37xx_pin_group armada_37xx_sb_groups[] = {
172 PIN_GRP_GPIO("usb32_drvvbus0", 0, 1, BIT(0), "drvbus"),
173 PIN_GRP_GPIO("usb2_drvvbus1", 1, 1, BIT(1), "drvbus"),
174 PIN_GRP_GPIO("sdio_sb", 24, 5, BIT(2), "sdio"),
175 PIN_GRP_EXTRA("rgmii", 6, 14, BIT(3), 0, BIT(3), 23, 1, "mii", "gpio"),
176 PIN_GRP_GPIO("pcie1", 3, 2, BIT(4), "pcie"),
177 PIN_GRP_GPIO("ptp", 20, 3, BIT(5), "ptp"),
178 PIN_GRP("ptp_clk", 21, 1, BIT(6), "ptp", "mii"),
179 PIN_GRP("ptp_trig", 22, 1, BIT(7), "ptp", "mii"),
180 PIN_GRP("mii_col", 23, 1, BIT(8), "mii", "mii_err"),
181 };
182
183 const struct armada_37xx_pin_data armada_37xx_pin_nb = {
184 .nr_pins = 36,
185 .name = "GPIO1",
186 .groups = armada_37xx_nb_groups,
187 .ngroups = ARRAY_SIZE(armada_37xx_nb_groups),
188 };
189
190 const struct armada_37xx_pin_data armada_37xx_pin_sb = {
191 .nr_pins = 29,
192 .name = "GPIO2",
193 .groups = armada_37xx_sb_groups,
194 .ngroups = ARRAY_SIZE(armada_37xx_sb_groups),
195 };
196
197 static inline void armada_37xx_update_reg(unsigned int *reg,
198 unsigned int offset)
199 {
200 /* We never have more than 2 registers */
201 if (offset >= GPIO_PER_REG) {
202 offset -= GPIO_PER_REG;
203 *reg += sizeof(u32);
204 }
205 }
206
207 static int armada_37xx_get_func_reg(struct armada_37xx_pin_group *grp,
208 const char *func)
209 {
210 int f;
211
212 for (f = 0; f < NB_FUNCS; f++)
213 if (!strcmp(grp->funcs[f], func))
214 return f;
215
216 return -ENOTSUPP;
217 }
218
219 static int armada_37xx_pmx_get_groups_count(struct udevice *dev)
220 {
221 struct armada_37xx_pinctrl *info = dev_get_priv(dev);
222
223 return info->ngroups;
224 }
225
226 static const char *armada_37xx_pmx_dummy_name = "_dummy";
227
228 static const char *armada_37xx_pmx_get_group_name(struct udevice *dev,
229 unsigned selector)
230 {
231 struct armada_37xx_pinctrl *info = dev_get_priv(dev);
232
233 if (!info->groups[selector].name)
234 return armada_37xx_pmx_dummy_name;
235
236 return info->groups[selector].name;
237 }
238
239 static int armada_37xx_pmx_get_funcs_count(struct udevice *dev)
240 {
241 struct armada_37xx_pinctrl *info = dev_get_priv(dev);
242
243 return info->nfuncs;
244 }
245
246 static const char *armada_37xx_pmx_get_func_name(struct udevice *dev,
247 unsigned selector)
248 {
249 struct armada_37xx_pinctrl *info = dev_get_priv(dev);
250
251 return info->funcs[selector].name;
252 }
253
254 static int armada_37xx_pmx_set_by_name(struct udevice *dev,
255 const char *name,
256 struct armada_37xx_pin_group *grp)
257 {
258 struct armada_37xx_pinctrl *info = dev_get_priv(dev);
259 unsigned int reg = SELECTION;
260 unsigned int mask = grp->reg_mask;
261 int func, val;
262
263 dev_dbg(info->dev, "enable function %s group %s\n",
264 name, grp->name);
265
266 func = armada_37xx_get_func_reg(grp, name);
267
268 if (func < 0)
269 return func;
270
271 val = grp->val[func];
272
273 clrsetbits_le32(info->base + reg, mask, val);
274
275 return 0;
276 }
277
278 static int armada_37xx_pmx_group_set(struct udevice *dev,
279 unsigned group_selector,
280 unsigned func_selector)
281 {
282 struct armada_37xx_pinctrl *info = dev_get_priv(dev);
283 struct armada_37xx_pin_group *grp = &info->groups[group_selector];
284 const char *name = info->funcs[func_selector].name;
285
286 return armada_37xx_pmx_set_by_name(dev, name, grp);
287 }
288
289 /**
290 * armada_37xx_add_function() - Add a new function to the list
291 * @funcs: array of function to add the new one
292 * @funcsize: size of the remaining space for the function
293 * @name: name of the function to add
294 *
295 * If it is a new function then create it by adding its name else
296 * increment the number of group associated to this function.
297 */
298 static int armada_37xx_add_function(struct armada_37xx_pmx_func *funcs,
299 int *funcsize, const char *name)
300 {
301 int i = 0;
302
303 if (*funcsize <= 0)
304 return -EOVERFLOW;
305
306 while (funcs->ngroups) {
307 /* function already there */
308 if (strcmp(funcs->name, name) == 0) {
309 funcs->ngroups++;
310
311 return -EEXIST;
312 }
313 funcs++;
314 i++;
315 }
316
317 /* append new unique function */
318 funcs->name = name;
319 funcs->ngroups = 1;
320 (*funcsize)--;
321
322 return 0;
323 }
324
325 /**
326 * armada_37xx_fill_group() - complete the group array
327 * @info: info driver instance
328 *
329 * Based on the data available from the armada_37xx_pin_group array
330 * completes the last member of the struct for each function: the list
331 * of the groups associated to this function.
332 *
333 */
334 static int armada_37xx_fill_group(struct armada_37xx_pinctrl *info)
335 {
336 int n, num = 0, funcsize = info->data->nr_pins;
337
338 for (n = 0; n < info->ngroups; n++) {
339 struct armada_37xx_pin_group *grp = &info->groups[n];
340 int i, j, f;
341
342 grp->pins = devm_kzalloc(info->dev,
343 (grp->npins + grp->extra_npins) *
344 sizeof(*grp->pins), GFP_KERNEL);
345 if (!grp->pins)
346 return -ENOMEM;
347
348 for (i = 0; i < grp->npins; i++)
349 grp->pins[i] = grp->start_pin + i;
350
351 for (j = 0; j < grp->extra_npins; j++)
352 grp->pins[i+j] = grp->extra_pin + j;
353
354 for (f = 0; f < NB_FUNCS; f++) {
355 int ret;
356 /* check for unique functions and count groups */
357 ret = armada_37xx_add_function(info->funcs, &funcsize,
358 grp->funcs[f]);
359 if (ret == -EOVERFLOW)
360 dev_err(info->dev,
361 "More functions than pins(%d)\n",
362 info->data->nr_pins);
363 if (ret < 0)
364 continue;
365 num++;
366 }
367 }
368
369 info->nfuncs = num;
370
371 return 0;
372 }
373
374 /**
375 * armada_37xx_fill_funcs() - complete the funcs array
376 * @info: info driver instance
377 *
378 * Based on the data available from the armada_37xx_pin_group array
379 * completes the last two member of the struct for each group:
380 * - the list of the pins included in the group
381 * - the list of pinmux functions that can be selected for this group
382 *
383 */
384 static int armada_37xx_fill_func(struct armada_37xx_pinctrl *info)
385 {
386 struct armada_37xx_pmx_func *funcs = info->funcs;
387 int n;
388
389 for (n = 0; n < info->nfuncs; n++) {
390 const char *name = funcs[n].name;
391 const char **groups;
392 int g;
393
394 funcs[n].groups = devm_kzalloc(info->dev, funcs[n].ngroups *
395 sizeof(*(funcs[n].groups)),
396 GFP_KERNEL);
397 if (!funcs[n].groups)
398 return -ENOMEM;
399
400 groups = funcs[n].groups;
401
402 for (g = 0; g < info->ngroups; g++) {
403 struct armada_37xx_pin_group *gp = &info->groups[g];
404 int f;
405
406 for (f = 0; f < NB_FUNCS; f++) {
407 if (strcmp(gp->funcs[f], name) == 0) {
408 *groups = gp->name;
409 groups++;
410 }
411 }
412 }
413 }
414 return 0;
415 }
416
417 static int armada_37xx_gpio_get(struct udevice *dev, unsigned int offset)
418 {
419 struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
420 unsigned int reg = INPUT_VAL;
421 unsigned int val, mask;
422
423 armada_37xx_update_reg(&reg, offset);
424 mask = BIT(offset);
425
426 val = readl(info->base + reg);
427
428 return (val & mask) != 0;
429 }
430
431 static int armada_37xx_gpio_set(struct udevice *dev, unsigned int offset,
432 int value)
433 {
434 struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
435 unsigned int reg = OUTPUT_VAL;
436 unsigned int mask, val;
437
438 armada_37xx_update_reg(&reg, offset);
439 mask = BIT(offset);
440 val = value ? mask : 0;
441
442 clrsetbits_le32(info->base + reg, mask, val);
443
444 return 0;
445 }
446
447 static int armada_37xx_gpio_get_direction(struct udevice *dev,
448 unsigned int offset)
449 {
450 struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
451 unsigned int reg = OUTPUT_EN;
452 unsigned int val, mask;
453
454 armada_37xx_update_reg(&reg, offset);
455 mask = BIT(offset);
456 val = readl(info->base + reg);
457
458 if (val & mask)
459 return GPIOF_OUTPUT;
460 else
461 return GPIOF_INPUT;
462 }
463
464 static int armada_37xx_gpio_direction_input(struct udevice *dev,
465 unsigned int offset)
466 {
467 struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
468 unsigned int reg = OUTPUT_EN;
469 unsigned int mask;
470
471 armada_37xx_update_reg(&reg, offset);
472 mask = BIT(offset);
473
474 clrbits_le32(info->base + reg, mask);
475
476 return 0;
477 }
478
479 static int armada_37xx_gpio_direction_output(struct udevice *dev,
480 unsigned int offset, int value)
481 {
482 struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
483 unsigned int reg = OUTPUT_EN;
484 unsigned int mask;
485
486 armada_37xx_update_reg(&reg, offset);
487 mask = BIT(offset);
488
489 setbits_le32(info->base + reg, mask);
490
491 /* And set the requested value */
492 return armada_37xx_gpio_set(dev, offset, value);
493 }
494
495 static int armada_37xx_gpio_probe(struct udevice *dev)
496 {
497 struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
498 struct gpio_dev_priv *uc_priv;
499
500 uc_priv = dev_get_uclass_priv(dev);
501 uc_priv->bank_name = info->data->name;
502 uc_priv->gpio_count = info->data->nr_pins;
503
504 return 0;
505 }
506
507 static const struct dm_gpio_ops armada_37xx_gpio_ops = {
508 .set_value = armada_37xx_gpio_set,
509 .get_value = armada_37xx_gpio_get,
510 .get_function = armada_37xx_gpio_get_direction,
511 .direction_input = armada_37xx_gpio_direction_input,
512 .direction_output = armada_37xx_gpio_direction_output,
513 };
514
515 static struct driver armada_37xx_gpio_driver = {
516 .name = "armada-37xx-gpio",
517 .id = UCLASS_GPIO,
518 .probe = armada_37xx_gpio_probe,
519 .ops = &armada_37xx_gpio_ops,
520 };
521
522 static int armada_37xx_gpiochip_register(struct udevice *parent,
523 struct armada_37xx_pinctrl *info)
524 {
525 const void *blob = gd->fdt_blob;
526 int node = dev_of_offset(parent);
527 struct uclass_driver *drv;
528 struct udevice *dev;
529 int ret = -ENODEV;
530 int subnode;
531 char *name;
532
533 /* Lookup GPIO driver */
534 drv = lists_uclass_lookup(UCLASS_GPIO);
535 if (!drv) {
536 puts("Cannot find GPIO driver\n");
537 return -ENOENT;
538 }
539
540 fdt_for_each_subnode(subnode, blob, node) {
541 if (!fdtdec_get_bool(blob, subnode, "gpio-controller")) {
542 ret = 0;
543 break;
544 }
545 };
546 if (ret)
547 return ret;
548
549 name = calloc(1, 32);
550 sprintf(name, "armada-37xx-gpio");
551
552 /* Create child device UCLASS_GPIO and bind it */
553 device_bind(parent, &armada_37xx_gpio_driver, name, NULL, subnode,
554 &dev);
555 dev_set_of_offset(dev, subnode);
556
557 return 0;
558 }
559
560 const struct pinctrl_ops armada_37xx_pinctrl_ops = {
561 .get_groups_count = armada_37xx_pmx_get_groups_count,
562 .get_group_name = armada_37xx_pmx_get_group_name,
563 .get_functions_count = armada_37xx_pmx_get_funcs_count,
564 .get_function_name = armada_37xx_pmx_get_func_name,
565 .pinmux_group_set = armada_37xx_pmx_group_set,
566 .set_state = pinctrl_generic_set_state,
567 };
568
569 int armada_37xx_pinctrl_probe(struct udevice *dev)
570 {
571 struct armada_37xx_pinctrl *info = dev_get_priv(dev);
572 const struct armada_37xx_pin_data *pin_data;
573 int ret;
574
575 info->data = (struct armada_37xx_pin_data *)dev_get_driver_data(dev);
576 pin_data = info->data;
577
578 info->base = (void __iomem *)devfdt_get_addr(dev);
579 if (!info->base) {
580 error("unable to find regmap\n");
581 return -ENODEV;
582 }
583
584 info->groups = pin_data->groups;
585 info->ngroups = pin_data->ngroups;
586
587 /*
588 * we allocate functions for number of pins and hope there are
589 * fewer unique functions than pins available
590 */
591 info->funcs = devm_kzalloc(info->dev, pin_data->nr_pins *
592 sizeof(struct armada_37xx_pmx_func), GFP_KERNEL);
593 if (!info->funcs)
594 return -ENOMEM;
595
596
597 ret = armada_37xx_fill_group(info);
598 if (ret)
599 return ret;
600
601 ret = armada_37xx_fill_func(info);
602 if (ret)
603 return ret;
604
605 ret = armada_37xx_gpiochip_register(dev, info);
606 if (ret)
607 return ret;
608
609 return 0;
610 }
611
612 static const struct udevice_id armada_37xx_pinctrl_of_match[] = {
613 {
614 .compatible = "marvell,armada3710-sb-pinctrl",
615 .data = (ulong)&armada_37xx_pin_sb,
616 },
617 {
618 .compatible = "marvell,armada3710-nb-pinctrl",
619 .data = (ulong)&armada_37xx_pin_nb,
620 },
621 { /* sentinel */ }
622 };
623
624 U_BOOT_DRIVER(armada_37xx_pinctrl) = {
625 .name = "armada-37xx-pinctrl",
626 .id = UCLASS_PINCTRL,
627 .of_match = of_match_ptr(armada_37xx_pinctrl_of_match),
628 .probe = armada_37xx_pinctrl_probe,
629 .priv_auto_alloc_size = sizeof(struct armada_37xx_pinctrl),
630 .ops = &armada_37xx_pinctrl_ops,
631 };