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0e37f88d MR |
1 | /* |
2 | * Allwinner A1X SoCs pinctrl driver. | |
3 | * | |
4 | * Copyright (C) 2012 Maxime Ripard | |
5 | * | |
6 | * Maxime Ripard <maxime.ripard@free-electrons.com> | |
7 | * | |
8 | * This file is licensed under the terms of the GNU General Public | |
9 | * License version 2. This program is licensed "as is" without any | |
10 | * warranty of any kind, whether express or implied. | |
11 | */ | |
12 | ||
13 | #include <linux/io.h> | |
950707c0 | 14 | #include <linux/clk.h> |
08e9e614 | 15 | #include <linux/gpio.h> |
60242db1 | 16 | #include <linux/irqdomain.h> |
0e37f88d MR |
17 | #include <linux/module.h> |
18 | #include <linux/of.h> | |
19 | #include <linux/of_address.h> | |
20 | #include <linux/of_device.h> | |
60242db1 | 21 | #include <linux/of_irq.h> |
0e37f88d MR |
22 | #include <linux/pinctrl/consumer.h> |
23 | #include <linux/pinctrl/machine.h> | |
24 | #include <linux/pinctrl/pinctrl.h> | |
25 | #include <linux/pinctrl/pinconf-generic.h> | |
26 | #include <linux/pinctrl/pinmux.h> | |
27 | #include <linux/platform_device.h> | |
28 | #include <linux/slab.h> | |
29 | ||
30 | #include "core.h" | |
31 | #include "pinctrl-sunxi.h" | |
44abb933 | 32 | #include "pinctrl-sunxi-pins.h" |
eaa3d848 | 33 | |
0e37f88d MR |
34 | static struct sunxi_pinctrl_group * |
35 | sunxi_pinctrl_find_group_by_name(struct sunxi_pinctrl *pctl, const char *group) | |
36 | { | |
37 | int i; | |
38 | ||
39 | for (i = 0; i < pctl->ngroups; i++) { | |
40 | struct sunxi_pinctrl_group *grp = pctl->groups + i; | |
41 | ||
42 | if (!strcmp(grp->name, group)) | |
43 | return grp; | |
44 | } | |
45 | ||
46 | return NULL; | |
47 | } | |
48 | ||
49 | static struct sunxi_pinctrl_function * | |
50 | sunxi_pinctrl_find_function_by_name(struct sunxi_pinctrl *pctl, | |
51 | const char *name) | |
52 | { | |
53 | struct sunxi_pinctrl_function *func = pctl->functions; | |
54 | int i; | |
55 | ||
56 | for (i = 0; i < pctl->nfunctions; i++) { | |
57 | if (!func[i].name) | |
58 | break; | |
59 | ||
60 | if (!strcmp(func[i].name, name)) | |
61 | return func + i; | |
62 | } | |
63 | ||
64 | return NULL; | |
65 | } | |
66 | ||
67 | static struct sunxi_desc_function * | |
68 | sunxi_pinctrl_desc_find_function_by_name(struct sunxi_pinctrl *pctl, | |
69 | const char *pin_name, | |
70 | const char *func_name) | |
71 | { | |
72 | int i; | |
73 | ||
74 | for (i = 0; i < pctl->desc->npins; i++) { | |
75 | const struct sunxi_desc_pin *pin = pctl->desc->pins + i; | |
76 | ||
77 | if (!strcmp(pin->pin.name, pin_name)) { | |
78 | struct sunxi_desc_function *func = pin->functions; | |
79 | ||
80 | while (func->name) { | |
81 | if (!strcmp(func->name, func_name)) | |
82 | return func; | |
83 | ||
84 | func++; | |
85 | } | |
86 | } | |
87 | } | |
88 | ||
89 | return NULL; | |
90 | } | |
91 | ||
814d4f2e MR |
92 | static struct sunxi_desc_function * |
93 | sunxi_pinctrl_desc_find_function_by_pin(struct sunxi_pinctrl *pctl, | |
94 | const u16 pin_num, | |
95 | const char *func_name) | |
96 | { | |
97 | int i; | |
98 | ||
99 | for (i = 0; i < pctl->desc->npins; i++) { | |
100 | const struct sunxi_desc_pin *pin = pctl->desc->pins + i; | |
101 | ||
102 | if (pin->pin.number == pin_num) { | |
103 | struct sunxi_desc_function *func = pin->functions; | |
104 | ||
105 | while (func->name) { | |
106 | if (!strcmp(func->name, func_name)) | |
107 | return func; | |
108 | ||
109 | func++; | |
110 | } | |
111 | } | |
112 | } | |
113 | ||
114 | return NULL; | |
115 | } | |
116 | ||
0e37f88d MR |
117 | static int sunxi_pctrl_get_groups_count(struct pinctrl_dev *pctldev) |
118 | { | |
119 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
120 | ||
121 | return pctl->ngroups; | |
122 | } | |
123 | ||
124 | static const char *sunxi_pctrl_get_group_name(struct pinctrl_dev *pctldev, | |
125 | unsigned group) | |
126 | { | |
127 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
128 | ||
129 | return pctl->groups[group].name; | |
130 | } | |
131 | ||
132 | static int sunxi_pctrl_get_group_pins(struct pinctrl_dev *pctldev, | |
133 | unsigned group, | |
134 | const unsigned **pins, | |
135 | unsigned *num_pins) | |
136 | { | |
137 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
138 | ||
139 | *pins = (unsigned *)&pctl->groups[group].pin; | |
140 | *num_pins = 1; | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | static int sunxi_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, | |
146 | struct device_node *node, | |
147 | struct pinctrl_map **map, | |
148 | unsigned *num_maps) | |
149 | { | |
150 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
151 | unsigned long *pinconfig; | |
152 | struct property *prop; | |
153 | const char *function; | |
154 | const char *group; | |
155 | int ret, nmaps, i = 0; | |
156 | u32 val; | |
157 | ||
158 | *map = NULL; | |
159 | *num_maps = 0; | |
160 | ||
161 | ret = of_property_read_string(node, "allwinner,function", &function); | |
162 | if (ret) { | |
163 | dev_err(pctl->dev, | |
164 | "missing allwinner,function property in node %s\n", | |
165 | node->name); | |
166 | return -EINVAL; | |
167 | } | |
168 | ||
169 | nmaps = of_property_count_strings(node, "allwinner,pins") * 2; | |
170 | if (nmaps < 0) { | |
171 | dev_err(pctl->dev, | |
172 | "missing allwinner,pins property in node %s\n", | |
173 | node->name); | |
174 | return -EINVAL; | |
175 | } | |
176 | ||
177 | *map = kmalloc(nmaps * sizeof(struct pinctrl_map), GFP_KERNEL); | |
3efa921d | 178 | if (!*map) |
0e37f88d MR |
179 | return -ENOMEM; |
180 | ||
181 | of_property_for_each_string(node, "allwinner,pins", prop, group) { | |
182 | struct sunxi_pinctrl_group *grp = | |
183 | sunxi_pinctrl_find_group_by_name(pctl, group); | |
184 | int j = 0, configlen = 0; | |
185 | ||
186 | if (!grp) { | |
187 | dev_err(pctl->dev, "unknown pin %s", group); | |
188 | continue; | |
189 | } | |
190 | ||
191 | if (!sunxi_pinctrl_desc_find_function_by_name(pctl, | |
192 | grp->name, | |
193 | function)) { | |
194 | dev_err(pctl->dev, "unsupported function %s on pin %s", | |
195 | function, group); | |
196 | continue; | |
197 | } | |
198 | ||
199 | (*map)[i].type = PIN_MAP_TYPE_MUX_GROUP; | |
200 | (*map)[i].data.mux.group = group; | |
201 | (*map)[i].data.mux.function = function; | |
202 | ||
203 | i++; | |
204 | ||
205 | (*map)[i].type = PIN_MAP_TYPE_CONFIGS_GROUP; | |
206 | (*map)[i].data.configs.group_or_pin = group; | |
207 | ||
208 | if (of_find_property(node, "allwinner,drive", NULL)) | |
209 | configlen++; | |
210 | if (of_find_property(node, "allwinner,pull", NULL)) | |
211 | configlen++; | |
212 | ||
213 | pinconfig = kzalloc(configlen * sizeof(*pinconfig), GFP_KERNEL); | |
214 | ||
215 | if (!of_property_read_u32(node, "allwinner,drive", &val)) { | |
216 | u16 strength = (val + 1) * 10; | |
217 | pinconfig[j++] = | |
218 | pinconf_to_config_packed(PIN_CONFIG_DRIVE_STRENGTH, | |
219 | strength); | |
220 | } | |
221 | ||
222 | if (!of_property_read_u32(node, "allwinner,pull", &val)) { | |
223 | enum pin_config_param pull = PIN_CONFIG_END; | |
224 | if (val == 1) | |
225 | pull = PIN_CONFIG_BIAS_PULL_UP; | |
226 | else if (val == 2) | |
227 | pull = PIN_CONFIG_BIAS_PULL_DOWN; | |
228 | pinconfig[j++] = pinconf_to_config_packed(pull, 0); | |
229 | } | |
230 | ||
231 | (*map)[i].data.configs.configs = pinconfig; | |
232 | (*map)[i].data.configs.num_configs = configlen; | |
233 | ||
234 | i++; | |
235 | } | |
236 | ||
237 | *num_maps = nmaps; | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | static void sunxi_pctrl_dt_free_map(struct pinctrl_dev *pctldev, | |
243 | struct pinctrl_map *map, | |
244 | unsigned num_maps) | |
245 | { | |
246 | int i; | |
247 | ||
248 | for (i = 0; i < num_maps; i++) { | |
249 | if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP) | |
250 | kfree(map[i].data.configs.configs); | |
251 | } | |
252 | ||
253 | kfree(map); | |
254 | } | |
255 | ||
022ab148 | 256 | static const struct pinctrl_ops sunxi_pctrl_ops = { |
0e37f88d MR |
257 | .dt_node_to_map = sunxi_pctrl_dt_node_to_map, |
258 | .dt_free_map = sunxi_pctrl_dt_free_map, | |
259 | .get_groups_count = sunxi_pctrl_get_groups_count, | |
260 | .get_group_name = sunxi_pctrl_get_group_name, | |
261 | .get_group_pins = sunxi_pctrl_get_group_pins, | |
262 | }; | |
263 | ||
264 | static int sunxi_pconf_group_get(struct pinctrl_dev *pctldev, | |
265 | unsigned group, | |
266 | unsigned long *config) | |
267 | { | |
268 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
269 | ||
270 | *config = pctl->groups[group].config; | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
275 | static int sunxi_pconf_group_set(struct pinctrl_dev *pctldev, | |
276 | unsigned group, | |
277 | unsigned long config) | |
278 | { | |
279 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
280 | struct sunxi_pinctrl_group *g = &pctl->groups[group]; | |
281 | u32 val, mask; | |
282 | u16 strength; | |
283 | u8 dlevel; | |
284 | ||
285 | switch (pinconf_to_config_param(config)) { | |
286 | case PIN_CONFIG_DRIVE_STRENGTH: | |
287 | strength = pinconf_to_config_argument(config); | |
288 | if (strength > 40) | |
289 | return -EINVAL; | |
290 | /* | |
291 | * We convert from mA to what the register expects: | |
292 | * 0: 10mA | |
293 | * 1: 20mA | |
294 | * 2: 30mA | |
295 | * 3: 40mA | |
296 | */ | |
297 | dlevel = strength / 10 - 1; | |
298 | val = readl(pctl->membase + sunxi_dlevel_reg(g->pin)); | |
299 | mask = DLEVEL_PINS_MASK << sunxi_dlevel_offset(g->pin); | |
300 | writel((val & ~mask) | dlevel << sunxi_dlevel_offset(g->pin), | |
301 | pctl->membase + sunxi_dlevel_reg(g->pin)); | |
302 | break; | |
303 | case PIN_CONFIG_BIAS_PULL_UP: | |
304 | val = readl(pctl->membase + sunxi_pull_reg(g->pin)); | |
305 | mask = PULL_PINS_MASK << sunxi_pull_offset(g->pin); | |
306 | writel((val & ~mask) | 1 << sunxi_pull_offset(g->pin), | |
307 | pctl->membase + sunxi_pull_reg(g->pin)); | |
308 | break; | |
309 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
310 | val = readl(pctl->membase + sunxi_pull_reg(g->pin)); | |
311 | mask = PULL_PINS_MASK << sunxi_pull_offset(g->pin); | |
312 | writel((val & ~mask) | 2 << sunxi_pull_offset(g->pin), | |
313 | pctl->membase + sunxi_pull_reg(g->pin)); | |
314 | break; | |
315 | default: | |
316 | break; | |
317 | } | |
318 | ||
319 | /* cache the config value */ | |
320 | g->config = config; | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
022ab148 | 325 | static const struct pinconf_ops sunxi_pconf_ops = { |
0e37f88d MR |
326 | .pin_config_group_get = sunxi_pconf_group_get, |
327 | .pin_config_group_set = sunxi_pconf_group_set, | |
328 | }; | |
329 | ||
330 | static int sunxi_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) | |
331 | { | |
332 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
333 | ||
334 | return pctl->nfunctions; | |
335 | } | |
336 | ||
337 | static const char *sunxi_pmx_get_func_name(struct pinctrl_dev *pctldev, | |
338 | unsigned function) | |
339 | { | |
340 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
341 | ||
342 | return pctl->functions[function].name; | |
343 | } | |
344 | ||
345 | static int sunxi_pmx_get_func_groups(struct pinctrl_dev *pctldev, | |
346 | unsigned function, | |
347 | const char * const **groups, | |
348 | unsigned * const num_groups) | |
349 | { | |
350 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
351 | ||
352 | *groups = pctl->functions[function].groups; | |
353 | *num_groups = pctl->functions[function].ngroups; | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | static void sunxi_pmx_set(struct pinctrl_dev *pctldev, | |
359 | unsigned pin, | |
360 | u8 config) | |
361 | { | |
362 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
363 | ||
364 | u32 val = readl(pctl->membase + sunxi_mux_reg(pin)); | |
365 | u32 mask = MUX_PINS_MASK << sunxi_mux_offset(pin); | |
366 | writel((val & ~mask) | config << sunxi_mux_offset(pin), | |
367 | pctl->membase + sunxi_mux_reg(pin)); | |
368 | } | |
369 | ||
370 | static int sunxi_pmx_enable(struct pinctrl_dev *pctldev, | |
371 | unsigned function, | |
372 | unsigned group) | |
373 | { | |
374 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
375 | struct sunxi_pinctrl_group *g = pctl->groups + group; | |
376 | struct sunxi_pinctrl_function *func = pctl->functions + function; | |
377 | struct sunxi_desc_function *desc = | |
378 | sunxi_pinctrl_desc_find_function_by_name(pctl, | |
379 | g->name, | |
380 | func->name); | |
381 | ||
382 | if (!desc) | |
383 | return -EINVAL; | |
384 | ||
385 | sunxi_pmx_set(pctldev, g->pin, desc->muxval); | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
08e9e614 MR |
390 | static int |
391 | sunxi_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, | |
392 | struct pinctrl_gpio_range *range, | |
393 | unsigned offset, | |
394 | bool input) | |
395 | { | |
396 | struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); | |
397 | struct sunxi_desc_function *desc; | |
08e9e614 | 398 | const char *func; |
08e9e614 MR |
399 | |
400 | if (input) | |
401 | func = "gpio_in"; | |
402 | else | |
403 | func = "gpio_out"; | |
404 | ||
814d4f2e MR |
405 | desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, offset, func); |
406 | if (!desc) | |
407 | return -EINVAL; | |
08e9e614 MR |
408 | |
409 | sunxi_pmx_set(pctldev, offset, desc->muxval); | |
410 | ||
814d4f2e | 411 | return 0; |
08e9e614 MR |
412 | } |
413 | ||
022ab148 | 414 | static const struct pinmux_ops sunxi_pmx_ops = { |
0e37f88d MR |
415 | .get_functions_count = sunxi_pmx_get_funcs_cnt, |
416 | .get_function_name = sunxi_pmx_get_func_name, | |
417 | .get_function_groups = sunxi_pmx_get_func_groups, | |
418 | .enable = sunxi_pmx_enable, | |
08e9e614 | 419 | .gpio_set_direction = sunxi_pmx_gpio_set_direction, |
0e37f88d MR |
420 | }; |
421 | ||
422 | static struct pinctrl_desc sunxi_pctrl_desc = { | |
423 | .confops = &sunxi_pconf_ops, | |
424 | .pctlops = &sunxi_pctrl_ops, | |
425 | .pmxops = &sunxi_pmx_ops, | |
426 | }; | |
427 | ||
08e9e614 MR |
428 | static int sunxi_pinctrl_gpio_request(struct gpio_chip *chip, unsigned offset) |
429 | { | |
430 | return pinctrl_request_gpio(chip->base + offset); | |
431 | } | |
432 | ||
433 | static void sunxi_pinctrl_gpio_free(struct gpio_chip *chip, unsigned offset) | |
434 | { | |
435 | pinctrl_free_gpio(chip->base + offset); | |
436 | } | |
437 | ||
438 | static int sunxi_pinctrl_gpio_direction_input(struct gpio_chip *chip, | |
439 | unsigned offset) | |
440 | { | |
441 | return pinctrl_gpio_direction_input(chip->base + offset); | |
442 | } | |
443 | ||
444 | static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset) | |
445 | { | |
446 | struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev); | |
447 | ||
448 | u32 reg = sunxi_data_reg(offset); | |
449 | u8 index = sunxi_data_offset(offset); | |
450 | u32 val = (readl(pctl->membase + reg) >> index) & DATA_PINS_MASK; | |
451 | ||
452 | return val; | |
453 | } | |
454 | ||
455 | static int sunxi_pinctrl_gpio_direction_output(struct gpio_chip *chip, | |
456 | unsigned offset, int value) | |
457 | { | |
458 | return pinctrl_gpio_direction_output(chip->base + offset); | |
459 | } | |
460 | ||
461 | static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip, | |
462 | unsigned offset, int value) | |
463 | { | |
464 | struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev); | |
465 | u32 reg = sunxi_data_reg(offset); | |
466 | u8 index = sunxi_data_offset(offset); | |
467 | ||
468 | writel((value & DATA_PINS_MASK) << index, pctl->membase + reg); | |
469 | } | |
470 | ||
a0d72094 MR |
471 | static int sunxi_pinctrl_gpio_of_xlate(struct gpio_chip *gc, |
472 | const struct of_phandle_args *gpiospec, | |
473 | u32 *flags) | |
474 | { | |
475 | int pin, base; | |
476 | ||
477 | base = PINS_PER_BANK * gpiospec->args[0]; | |
478 | pin = base + gpiospec->args[1]; | |
479 | ||
480 | if (pin > (gc->base + gc->ngpio)) | |
481 | return -EINVAL; | |
482 | ||
483 | if (flags) | |
484 | *flags = gpiospec->args[2]; | |
485 | ||
486 | return pin; | |
487 | } | |
488 | ||
60242db1 MR |
489 | static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
490 | { | |
491 | struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev); | |
492 | struct sunxi_desc_function *desc; | |
493 | ||
494 | if (offset > chip->ngpio) | |
495 | return -ENXIO; | |
496 | ||
497 | desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, offset, "irq"); | |
498 | if (!desc) | |
499 | return -EINVAL; | |
500 | ||
501 | pctl->irq_array[desc->irqnum] = offset; | |
502 | ||
503 | dev_dbg(chip->dev, "%s: request IRQ for GPIO %d, return %d\n", | |
504 | chip->label, offset + chip->base, desc->irqnum); | |
505 | ||
506 | return irq_find_mapping(pctl->domain, desc->irqnum); | |
507 | } | |
508 | ||
08e9e614 MR |
509 | static struct gpio_chip sunxi_pinctrl_gpio_chip = { |
510 | .owner = THIS_MODULE, | |
511 | .request = sunxi_pinctrl_gpio_request, | |
512 | .free = sunxi_pinctrl_gpio_free, | |
513 | .direction_input = sunxi_pinctrl_gpio_direction_input, | |
514 | .direction_output = sunxi_pinctrl_gpio_direction_output, | |
515 | .get = sunxi_pinctrl_gpio_get, | |
516 | .set = sunxi_pinctrl_gpio_set, | |
a0d72094 | 517 | .of_xlate = sunxi_pinctrl_gpio_of_xlate, |
60242db1 | 518 | .to_irq = sunxi_pinctrl_gpio_to_irq, |
a0d72094 | 519 | .of_gpio_n_cells = 3, |
08e9e614 MR |
520 | .can_sleep = 0, |
521 | }; | |
522 | ||
60242db1 MR |
523 | static int sunxi_pinctrl_irq_set_type(struct irq_data *d, |
524 | unsigned int type) | |
525 | { | |
526 | struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
527 | u32 reg = sunxi_irq_cfg_reg(d->hwirq); | |
528 | u8 index = sunxi_irq_cfg_offset(d->hwirq); | |
529 | u8 mode; | |
530 | ||
531 | switch (type) { | |
532 | case IRQ_TYPE_EDGE_RISING: | |
533 | mode = IRQ_EDGE_RISING; | |
534 | break; | |
535 | case IRQ_TYPE_EDGE_FALLING: | |
536 | mode = IRQ_EDGE_FALLING; | |
537 | break; | |
538 | case IRQ_TYPE_EDGE_BOTH: | |
539 | mode = IRQ_EDGE_BOTH; | |
540 | break; | |
541 | case IRQ_TYPE_LEVEL_HIGH: | |
542 | mode = IRQ_LEVEL_HIGH; | |
543 | break; | |
544 | case IRQ_TYPE_LEVEL_LOW: | |
545 | mode = IRQ_LEVEL_LOW; | |
546 | break; | |
547 | default: | |
548 | return -EINVAL; | |
549 | } | |
550 | ||
551 | writel((mode & IRQ_CFG_IRQ_MASK) << index, pctl->membase + reg); | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static void sunxi_pinctrl_irq_mask_ack(struct irq_data *d) | |
557 | { | |
558 | struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
559 | u32 ctrl_reg = sunxi_irq_ctrl_reg(d->hwirq); | |
560 | u8 ctrl_idx = sunxi_irq_ctrl_offset(d->hwirq); | |
561 | u32 status_reg = sunxi_irq_status_reg(d->hwirq); | |
562 | u8 status_idx = sunxi_irq_status_offset(d->hwirq); | |
563 | u32 val; | |
564 | ||
565 | /* Mask the IRQ */ | |
566 | val = readl(pctl->membase + ctrl_reg); | |
567 | writel(val & ~(1 << ctrl_idx), pctl->membase + ctrl_reg); | |
568 | ||
569 | /* Clear the IRQ */ | |
570 | writel(1 << status_idx, pctl->membase + status_reg); | |
571 | } | |
572 | ||
573 | static void sunxi_pinctrl_irq_mask(struct irq_data *d) | |
574 | { | |
575 | struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
576 | u32 reg = sunxi_irq_ctrl_reg(d->hwirq); | |
577 | u8 idx = sunxi_irq_ctrl_offset(d->hwirq); | |
578 | u32 val; | |
579 | ||
580 | /* Mask the IRQ */ | |
581 | val = readl(pctl->membase + reg); | |
582 | writel(val & ~(1 << idx), pctl->membase + reg); | |
583 | } | |
584 | ||
585 | static void sunxi_pinctrl_irq_unmask(struct irq_data *d) | |
586 | { | |
587 | struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); | |
588 | struct sunxi_desc_function *func; | |
589 | u32 reg = sunxi_irq_ctrl_reg(d->hwirq); | |
590 | u8 idx = sunxi_irq_ctrl_offset(d->hwirq); | |
591 | u32 val; | |
592 | ||
593 | func = sunxi_pinctrl_desc_find_function_by_pin(pctl, | |
594 | pctl->irq_array[d->hwirq], | |
595 | "irq"); | |
596 | ||
597 | /* Change muxing to INT mode */ | |
598 | sunxi_pmx_set(pctl->pctl_dev, pctl->irq_array[d->hwirq], func->muxval); | |
599 | ||
600 | /* Unmask the IRQ */ | |
601 | val = readl(pctl->membase + reg); | |
602 | writel(val | (1 << idx), pctl->membase + reg); | |
603 | } | |
604 | ||
605 | static struct irq_chip sunxi_pinctrl_irq_chip = { | |
606 | .irq_mask = sunxi_pinctrl_irq_mask, | |
607 | .irq_mask_ack = sunxi_pinctrl_irq_mask_ack, | |
608 | .irq_unmask = sunxi_pinctrl_irq_unmask, | |
609 | .irq_set_type = sunxi_pinctrl_irq_set_type, | |
610 | }; | |
611 | ||
612 | static void sunxi_pinctrl_irq_handler(unsigned irq, struct irq_desc *desc) | |
613 | { | |
614 | struct sunxi_pinctrl *pctl = irq_get_handler_data(irq); | |
615 | const unsigned long reg = readl(pctl->membase + IRQ_STATUS_REG); | |
616 | ||
617 | /* Clear all interrupts */ | |
618 | writel(reg, pctl->membase + IRQ_STATUS_REG); | |
619 | ||
620 | if (reg) { | |
621 | int irqoffset; | |
622 | ||
623 | for_each_set_bit(irqoffset, ®, SUNXI_IRQ_NUMBER) { | |
624 | int pin_irq = irq_find_mapping(pctl->domain, irqoffset); | |
625 | generic_handle_irq(pin_irq); | |
626 | } | |
627 | } | |
628 | } | |
629 | ||
0e37f88d | 630 | static struct of_device_id sunxi_pinctrl_match[] = { |
9f5b6b30 | 631 | { .compatible = "allwinner,sun4i-a10-pinctrl", .data = (void *)&sun4i_a10_pinctrl_data }, |
ac689366 | 632 | { .compatible = "allwinner,sun5i-a10s-pinctrl", .data = (void *)&sun5i_a10s_pinctrl_data }, |
eaa3d848 | 633 | { .compatible = "allwinner,sun5i-a13-pinctrl", .data = (void *)&sun5i_a13_pinctrl_data }, |
de0c9029 | 634 | { .compatible = "allwinner,sun6i-a31-pinctrl", .data = (void *)&sun6i_a31_pinctrl_data }, |
0e37f88d MR |
635 | {} |
636 | }; | |
637 | MODULE_DEVICE_TABLE(of, sunxi_pinctrl_match); | |
638 | ||
639 | static int sunxi_pinctrl_add_function(struct sunxi_pinctrl *pctl, | |
640 | const char *name) | |
641 | { | |
642 | struct sunxi_pinctrl_function *func = pctl->functions; | |
643 | ||
644 | while (func->name) { | |
645 | /* function already there */ | |
646 | if (strcmp(func->name, name) == 0) { | |
647 | func->ngroups++; | |
648 | return -EEXIST; | |
649 | } | |
650 | func++; | |
651 | } | |
652 | ||
653 | func->name = name; | |
654 | func->ngroups = 1; | |
655 | ||
656 | pctl->nfunctions++; | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | static int sunxi_pinctrl_build_state(struct platform_device *pdev) | |
662 | { | |
663 | struct sunxi_pinctrl *pctl = platform_get_drvdata(pdev); | |
664 | int i; | |
665 | ||
666 | pctl->ngroups = pctl->desc->npins; | |
667 | ||
668 | /* Allocate groups */ | |
669 | pctl->groups = devm_kzalloc(&pdev->dev, | |
670 | pctl->ngroups * sizeof(*pctl->groups), | |
671 | GFP_KERNEL); | |
672 | if (!pctl->groups) | |
673 | return -ENOMEM; | |
674 | ||
675 | for (i = 0; i < pctl->desc->npins; i++) { | |
676 | const struct sunxi_desc_pin *pin = pctl->desc->pins + i; | |
677 | struct sunxi_pinctrl_group *group = pctl->groups + i; | |
678 | ||
679 | group->name = pin->pin.name; | |
680 | group->pin = pin->pin.number; | |
681 | } | |
682 | ||
683 | /* | |
684 | * We suppose that we won't have any more functions than pins, | |
685 | * we'll reallocate that later anyway | |
686 | */ | |
687 | pctl->functions = devm_kzalloc(&pdev->dev, | |
688 | pctl->desc->npins * sizeof(*pctl->functions), | |
689 | GFP_KERNEL); | |
690 | if (!pctl->functions) | |
691 | return -ENOMEM; | |
692 | ||
693 | /* Count functions and their associated groups */ | |
694 | for (i = 0; i < pctl->desc->npins; i++) { | |
695 | const struct sunxi_desc_pin *pin = pctl->desc->pins + i; | |
696 | struct sunxi_desc_function *func = pin->functions; | |
697 | ||
698 | while (func->name) { | |
699 | sunxi_pinctrl_add_function(pctl, func->name); | |
700 | func++; | |
701 | } | |
702 | } | |
703 | ||
704 | pctl->functions = krealloc(pctl->functions, | |
705 | pctl->nfunctions * sizeof(*pctl->functions), | |
706 | GFP_KERNEL); | |
707 | ||
708 | for (i = 0; i < pctl->desc->npins; i++) { | |
709 | const struct sunxi_desc_pin *pin = pctl->desc->pins + i; | |
710 | struct sunxi_desc_function *func = pin->functions; | |
711 | ||
712 | while (func->name) { | |
713 | struct sunxi_pinctrl_function *func_item; | |
714 | const char **func_grp; | |
715 | ||
716 | func_item = sunxi_pinctrl_find_function_by_name(pctl, | |
717 | func->name); | |
718 | if (!func_item) | |
719 | return -EINVAL; | |
720 | ||
721 | if (!func_item->groups) { | |
722 | func_item->groups = | |
723 | devm_kzalloc(&pdev->dev, | |
724 | func_item->ngroups * sizeof(*func_item->groups), | |
725 | GFP_KERNEL); | |
726 | if (!func_item->groups) | |
727 | return -ENOMEM; | |
728 | } | |
729 | ||
730 | func_grp = func_item->groups; | |
731 | while (*func_grp) | |
732 | func_grp++; | |
733 | ||
734 | *func_grp = pin->pin.name; | |
735 | func++; | |
736 | } | |
737 | } | |
738 | ||
739 | return 0; | |
740 | } | |
741 | ||
742 | static int sunxi_pinctrl_probe(struct platform_device *pdev) | |
743 | { | |
744 | struct device_node *node = pdev->dev.of_node; | |
745 | const struct of_device_id *device; | |
746 | struct pinctrl_pin_desc *pins; | |
747 | struct sunxi_pinctrl *pctl; | |
08e9e614 | 748 | int i, ret, last_pin; |
950707c0 | 749 | struct clk *clk; |
0e37f88d MR |
750 | |
751 | pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); | |
752 | if (!pctl) | |
753 | return -ENOMEM; | |
754 | platform_set_drvdata(pdev, pctl); | |
755 | ||
756 | pctl->membase = of_iomap(node, 0); | |
757 | if (!pctl->membase) | |
758 | return -ENOMEM; | |
759 | ||
760 | device = of_match_device(sunxi_pinctrl_match, &pdev->dev); | |
761 | if (!device) | |
762 | return -ENODEV; | |
763 | ||
764 | pctl->desc = (struct sunxi_pinctrl_desc *)device->data; | |
765 | ||
766 | ret = sunxi_pinctrl_build_state(pdev); | |
767 | if (ret) { | |
768 | dev_err(&pdev->dev, "dt probe failed: %d\n", ret); | |
769 | return ret; | |
770 | } | |
771 | ||
772 | pins = devm_kzalloc(&pdev->dev, | |
773 | pctl->desc->npins * sizeof(*pins), | |
774 | GFP_KERNEL); | |
775 | if (!pins) | |
776 | return -ENOMEM; | |
777 | ||
778 | for (i = 0; i < pctl->desc->npins; i++) | |
779 | pins[i] = pctl->desc->pins[i].pin; | |
780 | ||
781 | sunxi_pctrl_desc.name = dev_name(&pdev->dev); | |
782 | sunxi_pctrl_desc.owner = THIS_MODULE; | |
783 | sunxi_pctrl_desc.pins = pins; | |
784 | sunxi_pctrl_desc.npins = pctl->desc->npins; | |
785 | pctl->dev = &pdev->dev; | |
786 | pctl->pctl_dev = pinctrl_register(&sunxi_pctrl_desc, | |
787 | &pdev->dev, pctl); | |
788 | if (!pctl->pctl_dev) { | |
789 | dev_err(&pdev->dev, "couldn't register pinctrl driver\n"); | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
08e9e614 MR |
793 | pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL); |
794 | if (!pctl->chip) { | |
795 | ret = -ENOMEM; | |
796 | goto pinctrl_error; | |
797 | } | |
798 | ||
799 | last_pin = pctl->desc->pins[pctl->desc->npins - 1].pin.number; | |
800 | pctl->chip = &sunxi_pinctrl_gpio_chip; | |
801 | pctl->chip->ngpio = round_up(last_pin, PINS_PER_BANK); | |
802 | pctl->chip->label = dev_name(&pdev->dev); | |
803 | pctl->chip->dev = &pdev->dev; | |
804 | pctl->chip->base = 0; | |
805 | ||
806 | ret = gpiochip_add(pctl->chip); | |
807 | if (ret) | |
808 | goto pinctrl_error; | |
809 | ||
810 | for (i = 0; i < pctl->desc->npins; i++) { | |
811 | const struct sunxi_desc_pin *pin = pctl->desc->pins + i; | |
812 | ||
813 | ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev), | |
814 | pin->pin.number, | |
815 | pin->pin.number, 1); | |
816 | if (ret) | |
817 | goto gpiochip_error; | |
818 | } | |
819 | ||
950707c0 | 820 | clk = devm_clk_get(&pdev->dev, NULL); |
d72f88a4 WY |
821 | if (IS_ERR(clk)) { |
822 | ret = PTR_ERR(clk); | |
950707c0 | 823 | goto gpiochip_error; |
d72f88a4 | 824 | } |
950707c0 EL |
825 | |
826 | clk_prepare_enable(clk); | |
827 | ||
60242db1 MR |
828 | pctl->irq = irq_of_parse_and_map(node, 0); |
829 | if (!pctl->irq) { | |
830 | ret = -EINVAL; | |
831 | goto gpiochip_error; | |
832 | } | |
833 | ||
834 | pctl->domain = irq_domain_add_linear(node, SUNXI_IRQ_NUMBER, | |
835 | &irq_domain_simple_ops, NULL); | |
836 | if (!pctl->domain) { | |
837 | dev_err(&pdev->dev, "Couldn't register IRQ domain\n"); | |
838 | ret = -ENOMEM; | |
839 | goto gpiochip_error; | |
840 | } | |
841 | ||
842 | for (i = 0; i < SUNXI_IRQ_NUMBER; i++) { | |
843 | int irqno = irq_create_mapping(pctl->domain, i); | |
844 | ||
845 | irq_set_chip_and_handler(irqno, &sunxi_pinctrl_irq_chip, | |
846 | handle_simple_irq); | |
847 | irq_set_chip_data(irqno, pctl); | |
848 | }; | |
849 | ||
850 | irq_set_chained_handler(pctl->irq, sunxi_pinctrl_irq_handler); | |
851 | irq_set_handler_data(pctl->irq, pctl); | |
852 | ||
08e9e614 | 853 | dev_info(&pdev->dev, "initialized sunXi PIO driver\n"); |
0e37f88d MR |
854 | |
855 | return 0; | |
08e9e614 MR |
856 | |
857 | gpiochip_error: | |
97fc4637 AL |
858 | if (gpiochip_remove(pctl->chip)) |
859 | dev_err(&pdev->dev, "failed to remove gpio chip\n"); | |
08e9e614 MR |
860 | pinctrl_error: |
861 | pinctrl_unregister(pctl->pctl_dev); | |
862 | return ret; | |
0e37f88d MR |
863 | } |
864 | ||
865 | static struct platform_driver sunxi_pinctrl_driver = { | |
866 | .probe = sunxi_pinctrl_probe, | |
867 | .driver = { | |
868 | .name = "sunxi-pinctrl", | |
869 | .owner = THIS_MODULE, | |
870 | .of_match_table = sunxi_pinctrl_match, | |
871 | }, | |
872 | }; | |
873 | module_platform_driver(sunxi_pinctrl_driver); | |
874 | ||
875 | MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com"); | |
876 | MODULE_DESCRIPTION("Allwinner A1X pinctrl driver"); | |
877 | MODULE_LICENSE("GPL"); |