Commit | Line | Data |
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8b8b091b TL |
1 | /* |
2 | * Generic device tree based pinctrl driver for one register per pin | |
3 | * type pinmux controllers | |
4 | * | |
5 | * Copyright (C) 2012 Texas Instruments, Inc. | |
6 | * | |
7 | * This file is licensed under the terms of the GNU General Public | |
8 | * License version 2. This program is licensed "as is" without any | |
9 | * warranty of any kind, whether express or implied. | |
10 | */ | |
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/io.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/list.h> | |
3e6cee17 TL |
18 | #include <linux/interrupt.h> |
19 | ||
20 | #include <linux/irqchip/chained_irq.h> | |
8b8b091b TL |
21 | |
22 | #include <linux/of.h> | |
23 | #include <linux/of_device.h> | |
24 | #include <linux/of_address.h> | |
3e6cee17 | 25 | #include <linux/of_irq.h> |
8b8b091b TL |
26 | |
27 | #include <linux/pinctrl/pinctrl.h> | |
28 | #include <linux/pinctrl/pinmux.h> | |
9dddb4df | 29 | #include <linux/pinctrl/pinconf-generic.h> |
8b8b091b | 30 | |
dc7743aa TL |
31 | #include <linux/platform_data/pinctrl-single.h> |
32 | ||
8b8b091b | 33 | #include "core.h" |
4622215f | 34 | #include "devicetree.h" |
9dddb4df | 35 | #include "pinconf.h" |
571aec4d | 36 | #include "pinmux.h" |
8b8b091b TL |
37 | |
38 | #define DRIVER_NAME "pinctrl-single" | |
8b8b091b TL |
39 | #define PCS_OFF_DISABLED ~0U |
40 | ||
8b8b091b TL |
41 | /** |
42 | * struct pcs_func_vals - mux function register offset and value pair | |
43 | * @reg: register virtual address | |
44 | * @val: register value | |
45 | */ | |
46 | struct pcs_func_vals { | |
47 | void __iomem *reg; | |
48 | unsigned val; | |
9e605cb6 | 49 | unsigned mask; |
8b8b091b TL |
50 | }; |
51 | ||
9dddb4df HZ |
52 | /** |
53 | * struct pcs_conf_vals - pinconf parameter, pinconf register offset | |
54 | * and value, enable, disable, mask | |
55 | * @param: config parameter | |
56 | * @val: user input bits in the pinconf register | |
57 | * @enable: enable bits in the pinconf register | |
58 | * @disable: disable bits in the pinconf register | |
59 | * @mask: mask bits in the register value | |
60 | */ | |
61 | struct pcs_conf_vals { | |
62 | enum pin_config_param param; | |
63 | unsigned val; | |
64 | unsigned enable; | |
65 | unsigned disable; | |
66 | unsigned mask; | |
67 | }; | |
68 | ||
69 | /** | |
70 | * struct pcs_conf_type - pinconf property name, pinconf param pair | |
71 | * @name: property name in DTS file | |
72 | * @param: config parameter | |
73 | */ | |
74 | struct pcs_conf_type { | |
75 | const char *name; | |
76 | enum pin_config_param param; | |
77 | }; | |
78 | ||
8b8b091b TL |
79 | /** |
80 | * struct pcs_function - pinctrl function | |
81 | * @name: pinctrl function name | |
82 | * @vals: register and vals array | |
83 | * @nvals: number of entries in vals array | |
84 | * @pgnames: array of pingroup names the function uses | |
85 | * @npgnames: number of pingroup names the function uses | |
86 | * @node: list node | |
87 | */ | |
88 | struct pcs_function { | |
89 | const char *name; | |
90 | struct pcs_func_vals *vals; | |
91 | unsigned nvals; | |
92 | const char **pgnames; | |
93 | int npgnames; | |
9dddb4df HZ |
94 | struct pcs_conf_vals *conf; |
95 | int nconfs; | |
8b8b091b TL |
96 | struct list_head node; |
97 | }; | |
98 | ||
a1a277eb HZ |
99 | /** |
100 | * struct pcs_gpiofunc_range - pin ranges with same mux value of gpio function | |
101 | * @offset: offset base of pins | |
102 | * @npins: number pins with the same mux value of gpio function | |
103 | * @gpiofunc: mux value of gpio function | |
104 | * @node: list node | |
105 | */ | |
106 | struct pcs_gpiofunc_range { | |
107 | unsigned offset; | |
108 | unsigned npins; | |
109 | unsigned gpiofunc; | |
110 | struct list_head node; | |
111 | }; | |
112 | ||
8b8b091b TL |
113 | /** |
114 | * struct pcs_data - wrapper for data needed by pinctrl framework | |
115 | * @pa: pindesc array | |
116 | * @cur: index to current element | |
117 | * | |
118 | * REVISIT: We should be able to drop this eventually by adding | |
119 | * support for registering pins individually in the pinctrl | |
120 | * framework for those drivers that don't need a static array. | |
121 | */ | |
122 | struct pcs_data { | |
123 | struct pinctrl_pin_desc *pa; | |
124 | int cur; | |
125 | }; | |
126 | ||
02e483f6 TL |
127 | /** |
128 | * struct pcs_soc_data - SoC specific settings | |
129 | * @flags: initial SoC specific PCS_FEAT_xxx values | |
3e6cee17 TL |
130 | * @irq: optional interrupt for the controller |
131 | * @irq_enable_mask: optional SoC specific interrupt enable mask | |
132 | * @irq_status_mask: optional SoC specific interrupt status mask | |
dc7743aa | 133 | * @rearm: optional SoC specific wake-up rearm function |
02e483f6 TL |
134 | */ |
135 | struct pcs_soc_data { | |
136 | unsigned flags; | |
3e6cee17 TL |
137 | int irq; |
138 | unsigned irq_enable_mask; | |
139 | unsigned irq_status_mask; | |
dc7743aa | 140 | void (*rearm)(void); |
02e483f6 TL |
141 | }; |
142 | ||
8b8b091b TL |
143 | /** |
144 | * struct pcs_device - pinctrl device instance | |
145 | * @res: resources | |
146 | * @base: virtual address of the controller | |
147 | * @size: size of the ioremapped area | |
148 | * @dev: device entry | |
4622215f | 149 | * @np: device tree node |
8b8b091b | 150 | * @pctl: pin controller device |
02e483f6 | 151 | * @flags: mask of PCS_FEAT_xxx values |
4622215f TL |
152 | * @missing_nr_pinctrl_cells: for legacy binding, may go away |
153 | * @socdata: soc specific data | |
3e6cee17 | 154 | * @lock: spinlock for register access |
8b8b091b TL |
155 | * @mutex: mutex protecting the lists |
156 | * @width: bits per mux register | |
157 | * @fmask: function register mask | |
158 | * @fshift: function register shift | |
159 | * @foff: value to turn mux off | |
160 | * @fmax: max number of functions in fmask | |
4622215f TL |
161 | * @bits_per_mux: number of bits per mux |
162 | * @bits_per_pin: number of bits per pin | |
8b8b091b | 163 | * @pins: physical pins on the SoC |
a1a277eb | 164 | * @gpiofuncs: list of gpio functions |
3e6cee17 TL |
165 | * @irqs: list of interrupt registers |
166 | * @chip: chip container for this instance | |
167 | * @domain: IRQ domain for this instance | |
8b8b091b TL |
168 | * @desc: pin controller descriptor |
169 | * @read: register read function to use | |
170 | * @write: register write function to use | |
171 | */ | |
172 | struct pcs_device { | |
173 | struct resource *res; | |
174 | void __iomem *base; | |
175 | unsigned size; | |
176 | struct device *dev; | |
4622215f | 177 | struct device_node *np; |
8b8b091b | 178 | struct pinctrl_dev *pctl; |
02e483f6 | 179 | unsigned flags; |
3e6cee17 TL |
180 | #define PCS_QUIRK_SHARED_IRQ (1 << 2) |
181 | #define PCS_FEAT_IRQ (1 << 1) | |
02e483f6 | 182 | #define PCS_FEAT_PINCONF (1 << 0) |
4622215f | 183 | struct property *missing_nr_pinctrl_cells; |
3e6cee17 TL |
184 | struct pcs_soc_data socdata; |
185 | raw_spinlock_t lock; | |
8b8b091b TL |
186 | struct mutex mutex; |
187 | unsigned width; | |
188 | unsigned fmask; | |
189 | unsigned fshift; | |
190 | unsigned foff; | |
191 | unsigned fmax; | |
9e605cb6 | 192 | bool bits_per_mux; |
4e7e8017 | 193 | unsigned bits_per_pin; |
8b8b091b | 194 | struct pcs_data pins; |
a1a277eb | 195 | struct list_head gpiofuncs; |
3e6cee17 TL |
196 | struct list_head irqs; |
197 | struct irq_chip chip; | |
198 | struct irq_domain *domain; | |
8b8b091b TL |
199 | struct pinctrl_desc desc; |
200 | unsigned (*read)(void __iomem *reg); | |
201 | void (*write)(unsigned val, void __iomem *reg); | |
202 | }; | |
203 | ||
3e6cee17 TL |
204 | #define PCS_QUIRK_HAS_SHARED_IRQ (pcs->flags & PCS_QUIRK_SHARED_IRQ) |
205 | #define PCS_HAS_IRQ (pcs->flags & PCS_FEAT_IRQ) | |
02e483f6 TL |
206 | #define PCS_HAS_PINCONF (pcs->flags & PCS_FEAT_PINCONF) |
207 | ||
9dddb4df HZ |
208 | static int pcs_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, |
209 | unsigned long *config); | |
210 | static int pcs_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, | |
03b054e9 | 211 | unsigned long *configs, unsigned num_configs); |
9dddb4df HZ |
212 | |
213 | static enum pin_config_param pcs_bias[] = { | |
214 | PIN_CONFIG_BIAS_PULL_DOWN, | |
215 | PIN_CONFIG_BIAS_PULL_UP, | |
216 | }; | |
217 | ||
3c177a16 SH |
218 | /* |
219 | * This lock class tells lockdep that irqchip core that this single | |
220 | * pinctrl can be in a different category than its parents, so it won't | |
221 | * report false recursion. | |
222 | */ | |
223 | static struct lock_class_key pcs_lock_class; | |
224 | ||
39c3fd58 AL |
225 | /* Class for the IRQ request mutex */ |
226 | static struct lock_class_key pcs_request_class; | |
227 | ||
8b8b091b TL |
228 | /* |
229 | * REVISIT: Reads and writes could eventually use regmap or something | |
230 | * generic. But at least on omaps, some mux registers are performance | |
231 | * critical as they may need to be remuxed every time before and after | |
232 | * idle. Adding tests for register access width for every read and | |
233 | * write like regmap is doing is not desired, and caching the registers | |
234 | * does not help in this case. | |
235 | */ | |
236 | ||
237 | static unsigned __maybe_unused pcs_readb(void __iomem *reg) | |
238 | { | |
239 | return readb(reg); | |
240 | } | |
241 | ||
242 | static unsigned __maybe_unused pcs_readw(void __iomem *reg) | |
243 | { | |
244 | return readw(reg); | |
245 | } | |
246 | ||
247 | static unsigned __maybe_unused pcs_readl(void __iomem *reg) | |
248 | { | |
249 | return readl(reg); | |
250 | } | |
251 | ||
252 | static void __maybe_unused pcs_writeb(unsigned val, void __iomem *reg) | |
253 | { | |
254 | writeb(val, reg); | |
255 | } | |
256 | ||
257 | static void __maybe_unused pcs_writew(unsigned val, void __iomem *reg) | |
258 | { | |
259 | writew(val, reg); | |
260 | } | |
261 | ||
262 | static void __maybe_unused pcs_writel(unsigned val, void __iomem *reg) | |
263 | { | |
264 | writel(val, reg); | |
265 | } | |
266 | ||
8b8b091b TL |
267 | static void pcs_pin_dbg_show(struct pinctrl_dev *pctldev, |
268 | struct seq_file *s, | |
e7ed6718 | 269 | unsigned pin) |
8b8b091b | 270 | { |
7d66ce7f | 271 | struct pcs_device *pcs; |
e7ed6718 | 272 | unsigned val, mux_bytes; |
223decc4 TL |
273 | unsigned long offset; |
274 | size_t pa; | |
7d66ce7f MP |
275 | |
276 | pcs = pinctrl_dev_get_drvdata(pctldev); | |
277 | ||
e7ed6718 | 278 | mux_bytes = pcs->width / BITS_PER_BYTE; |
223decc4 TL |
279 | offset = pin * mux_bytes; |
280 | val = pcs->read(pcs->base + offset); | |
281 | pa = pcs->res->start + offset; | |
7d66ce7f | 282 | |
223decc4 | 283 | seq_printf(s, "%zx %08x %s ", pa, val, DRIVER_NAME); |
8b8b091b TL |
284 | } |
285 | ||
286 | static void pcs_dt_free_map(struct pinctrl_dev *pctldev, | |
287 | struct pinctrl_map *map, unsigned num_maps) | |
288 | { | |
289 | struct pcs_device *pcs; | |
290 | ||
291 | pcs = pinctrl_dev_get_drvdata(pctldev); | |
292 | devm_kfree(pcs->dev, map); | |
293 | } | |
294 | ||
295 | static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev, | |
296 | struct device_node *np_config, | |
297 | struct pinctrl_map **map, unsigned *num_maps); | |
298 | ||
022ab148 | 299 | static const struct pinctrl_ops pcs_pinctrl_ops = { |
caeb774e TL |
300 | .get_groups_count = pinctrl_generic_get_group_count, |
301 | .get_group_name = pinctrl_generic_get_group_name, | |
302 | .get_group_pins = pinctrl_generic_get_group_pins, | |
8b8b091b TL |
303 | .pin_dbg_show = pcs_pin_dbg_show, |
304 | .dt_node_to_map = pcs_dt_node_to_map, | |
305 | .dt_free_map = pcs_dt_free_map, | |
306 | }; | |
307 | ||
9dddb4df HZ |
308 | static int pcs_get_function(struct pinctrl_dev *pctldev, unsigned pin, |
309 | struct pcs_function **func) | |
310 | { | |
311 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); | |
312 | struct pin_desc *pdesc = pin_desc_get(pctldev, pin); | |
313 | const struct pinctrl_setting_mux *setting; | |
571aec4d | 314 | struct function_desc *function; |
9dddb4df HZ |
315 | unsigned fselector; |
316 | ||
317 | /* If pin is not described in DTS & enabled, mux_setting is NULL. */ | |
318 | setting = pdesc->mux_setting; | |
319 | if (!setting) | |
320 | return -ENOTSUPP; | |
321 | fselector = setting->func; | |
571aec4d TL |
322 | function = pinmux_generic_get_function(pctldev, fselector); |
323 | *func = function->data; | |
9dddb4df HZ |
324 | if (!(*func)) { |
325 | dev_err(pcs->dev, "%s could not find function%i\n", | |
326 | __func__, fselector); | |
327 | return -ENOTSUPP; | |
328 | } | |
329 | return 0; | |
330 | } | |
331 | ||
03e9f0ca | 332 | static int pcs_set_mux(struct pinctrl_dev *pctldev, unsigned fselector, |
8b8b091b TL |
333 | unsigned group) |
334 | { | |
335 | struct pcs_device *pcs; | |
571aec4d | 336 | struct function_desc *function; |
8b8b091b TL |
337 | struct pcs_function *func; |
338 | int i; | |
339 | ||
340 | pcs = pinctrl_dev_get_drvdata(pctldev); | |
477ac771 HZ |
341 | /* If function mask is null, needn't enable it. */ |
342 | if (!pcs->fmask) | |
343 | return 0; | |
571aec4d TL |
344 | function = pinmux_generic_get_function(pctldev, fselector); |
345 | func = function->data; | |
8b8b091b TL |
346 | if (!func) |
347 | return -EINVAL; | |
348 | ||
349 | dev_dbg(pcs->dev, "enabling %s function%i\n", | |
350 | func->name, fselector); | |
351 | ||
352 | for (i = 0; i < func->nvals; i++) { | |
353 | struct pcs_func_vals *vals; | |
3e6cee17 | 354 | unsigned long flags; |
9e605cb6 | 355 | unsigned val, mask; |
8b8b091b TL |
356 | |
357 | vals = &func->vals[i]; | |
3e6cee17 | 358 | raw_spin_lock_irqsave(&pcs->lock, flags); |
8b8b091b | 359 | val = pcs->read(vals->reg); |
4e7e8017 MP |
360 | |
361 | if (pcs->bits_per_mux) | |
362 | mask = vals->mask; | |
9e605cb6 | 363 | else |
4e7e8017 | 364 | mask = pcs->fmask; |
9e605cb6 PU |
365 | |
366 | val &= ~mask; | |
367 | val |= (vals->val & mask); | |
8b8b091b | 368 | pcs->write(val, vals->reg); |
3e6cee17 | 369 | raw_spin_unlock_irqrestore(&pcs->lock, flags); |
8b8b091b TL |
370 | } |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
8b8b091b | 375 | static int pcs_request_gpio(struct pinctrl_dev *pctldev, |
a1a277eb | 376 | struct pinctrl_gpio_range *range, unsigned pin) |
8b8b091b | 377 | { |
a1a277eb HZ |
378 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
379 | struct pcs_gpiofunc_range *frange = NULL; | |
380 | struct list_head *pos, *tmp; | |
381 | int mux_bytes = 0; | |
382 | unsigned data; | |
383 | ||
477ac771 HZ |
384 | /* If function mask is null, return directly. */ |
385 | if (!pcs->fmask) | |
386 | return -ENOTSUPP; | |
387 | ||
a1a277eb HZ |
388 | list_for_each_safe(pos, tmp, &pcs->gpiofuncs) { |
389 | frange = list_entry(pos, struct pcs_gpiofunc_range, node); | |
390 | if (pin >= frange->offset + frange->npins | |
391 | || pin < frange->offset) | |
392 | continue; | |
393 | mux_bytes = pcs->width / BITS_PER_BYTE; | |
45dcb54f DL |
394 | |
395 | if (pcs->bits_per_mux) { | |
396 | int byte_num, offset, pin_shift; | |
397 | ||
398 | byte_num = (pcs->bits_per_pin * pin) / BITS_PER_BYTE; | |
399 | offset = (byte_num / mux_bytes) * mux_bytes; | |
400 | pin_shift = pin % (pcs->width / pcs->bits_per_pin) * | |
401 | pcs->bits_per_pin; | |
402 | ||
403 | data = pcs->read(pcs->base + offset); | |
404 | data &= ~(pcs->fmask << pin_shift); | |
405 | data |= frange->gpiofunc << pin_shift; | |
406 | pcs->write(data, pcs->base + offset); | |
407 | } else { | |
408 | data = pcs->read(pcs->base + pin * mux_bytes); | |
409 | data &= ~pcs->fmask; | |
410 | data |= frange->gpiofunc; | |
411 | pcs->write(data, pcs->base + pin * mux_bytes); | |
412 | } | |
a1a277eb HZ |
413 | break; |
414 | } | |
415 | return 0; | |
8b8b091b TL |
416 | } |
417 | ||
022ab148 | 418 | static const struct pinmux_ops pcs_pinmux_ops = { |
571aec4d TL |
419 | .get_functions_count = pinmux_generic_get_function_count, |
420 | .get_function_name = pinmux_generic_get_function_name, | |
421 | .get_function_groups = pinmux_generic_get_function_groups, | |
9e3a979f | 422 | .set_mux = pcs_set_mux, |
8b8b091b TL |
423 | .gpio_request_enable = pcs_request_gpio, |
424 | }; | |
425 | ||
9dddb4df HZ |
426 | /* Clear BIAS value */ |
427 | static void pcs_pinconf_clear_bias(struct pinctrl_dev *pctldev, unsigned pin) | |
428 | { | |
429 | unsigned long config; | |
430 | int i; | |
431 | for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) { | |
432 | config = pinconf_to_config_packed(pcs_bias[i], 0); | |
03b054e9 | 433 | pcs_pinconf_set(pctldev, pin, &config, 1); |
9dddb4df HZ |
434 | } |
435 | } | |
436 | ||
437 | /* | |
438 | * Check whether PIN_CONFIG_BIAS_DISABLE is valid. | |
439 | * It's depend on that PULL_DOWN & PULL_UP configs are all invalid. | |
440 | */ | |
441 | static bool pcs_pinconf_bias_disable(struct pinctrl_dev *pctldev, unsigned pin) | |
442 | { | |
443 | unsigned long config; | |
444 | int i; | |
445 | ||
446 | for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) { | |
447 | config = pinconf_to_config_packed(pcs_bias[i], 0); | |
448 | if (!pcs_pinconf_get(pctldev, pin, &config)) | |
449 | goto out; | |
450 | } | |
451 | return true; | |
452 | out: | |
453 | return false; | |
454 | } | |
455 | ||
8b8b091b TL |
456 | static int pcs_pinconf_get(struct pinctrl_dev *pctldev, |
457 | unsigned pin, unsigned long *config) | |
458 | { | |
9dddb4df HZ |
459 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
460 | struct pcs_function *func; | |
461 | enum pin_config_param param; | |
462 | unsigned offset = 0, data = 0, i, j, ret; | |
463 | ||
464 | ret = pcs_get_function(pctldev, pin, &func); | |
465 | if (ret) | |
466 | return ret; | |
467 | ||
468 | for (i = 0; i < func->nconfs; i++) { | |
469 | param = pinconf_to_config_param(*config); | |
470 | if (param == PIN_CONFIG_BIAS_DISABLE) { | |
471 | if (pcs_pinconf_bias_disable(pctldev, pin)) { | |
472 | *config = 0; | |
473 | return 0; | |
474 | } else { | |
475 | return -ENOTSUPP; | |
476 | } | |
477 | } else if (param != func->conf[i].param) { | |
478 | continue; | |
479 | } | |
480 | ||
481 | offset = pin * (pcs->width / BITS_PER_BYTE); | |
482 | data = pcs->read(pcs->base + offset) & func->conf[i].mask; | |
483 | switch (func->conf[i].param) { | |
484 | /* 4 parameters */ | |
485 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
486 | case PIN_CONFIG_BIAS_PULL_UP: | |
487 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: | |
488 | if ((data != func->conf[i].enable) || | |
489 | (data == func->conf[i].disable)) | |
490 | return -ENOTSUPP; | |
491 | *config = 0; | |
492 | break; | |
493 | /* 2 parameters */ | |
494 | case PIN_CONFIG_INPUT_SCHMITT: | |
495 | for (j = 0; j < func->nconfs; j++) { | |
496 | switch (func->conf[j].param) { | |
497 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: | |
498 | if (data != func->conf[j].enable) | |
499 | return -ENOTSUPP; | |
500 | break; | |
501 | default: | |
502 | break; | |
503 | } | |
504 | } | |
505 | *config = data; | |
506 | break; | |
507 | case PIN_CONFIG_DRIVE_STRENGTH: | |
508 | case PIN_CONFIG_SLEW_RATE: | |
4bd75477 | 509 | case PIN_CONFIG_LOW_POWER_MODE: |
9dddb4df HZ |
510 | default: |
511 | *config = data; | |
512 | break; | |
513 | } | |
514 | return 0; | |
515 | } | |
8b8b091b TL |
516 | return -ENOTSUPP; |
517 | } | |
518 | ||
519 | static int pcs_pinconf_set(struct pinctrl_dev *pctldev, | |
03b054e9 SY |
520 | unsigned pin, unsigned long *configs, |
521 | unsigned num_configs) | |
8b8b091b | 522 | { |
9dddb4df HZ |
523 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
524 | struct pcs_function *func; | |
7cba5b3f | 525 | unsigned offset = 0, shift = 0, i, data, ret; |
58957d2e | 526 | u32 arg; |
03b054e9 | 527 | int j; |
9dddb4df HZ |
528 | |
529 | ret = pcs_get_function(pctldev, pin, &func); | |
530 | if (ret) | |
531 | return ret; | |
532 | ||
03b054e9 SY |
533 | for (j = 0; j < num_configs; j++) { |
534 | for (i = 0; i < func->nconfs; i++) { | |
535 | if (pinconf_to_config_param(configs[j]) | |
536 | != func->conf[i].param) | |
537 | continue; | |
538 | ||
9dddb4df HZ |
539 | offset = pin * (pcs->width / BITS_PER_BYTE); |
540 | data = pcs->read(pcs->base + offset); | |
03b054e9 | 541 | arg = pinconf_to_config_argument(configs[j]); |
9dddb4df HZ |
542 | switch (func->conf[i].param) { |
543 | /* 2 parameters */ | |
544 | case PIN_CONFIG_INPUT_SCHMITT: | |
545 | case PIN_CONFIG_DRIVE_STRENGTH: | |
546 | case PIN_CONFIG_SLEW_RATE: | |
4bd75477 | 547 | case PIN_CONFIG_LOW_POWER_MODE: |
9dddb4df | 548 | shift = ffs(func->conf[i].mask) - 1; |
9dddb4df HZ |
549 | data &= ~func->conf[i].mask; |
550 | data |= (arg << shift) & func->conf[i].mask; | |
551 | break; | |
552 | /* 4 parameters */ | |
553 | case PIN_CONFIG_BIAS_DISABLE: | |
554 | pcs_pinconf_clear_bias(pctldev, pin); | |
555 | break; | |
556 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
557 | case PIN_CONFIG_BIAS_PULL_UP: | |
7cba5b3f | 558 | if (arg) |
9dddb4df HZ |
559 | pcs_pinconf_clear_bias(pctldev, pin); |
560 | /* fall through */ | |
561 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: | |
562 | data &= ~func->conf[i].mask; | |
7cba5b3f | 563 | if (arg) |
9dddb4df HZ |
564 | data |= func->conf[i].enable; |
565 | else | |
566 | data |= func->conf[i].disable; | |
567 | break; | |
568 | default: | |
569 | return -ENOTSUPP; | |
570 | } | |
571 | pcs->write(data, pcs->base + offset); | |
03b054e9 SY |
572 | |
573 | break; | |
9dddb4df | 574 | } |
03b054e9 SY |
575 | if (i >= func->nconfs) |
576 | return -ENOTSUPP; | |
577 | } /* for each config */ | |
578 | ||
579 | return 0; | |
8b8b091b TL |
580 | } |
581 | ||
582 | static int pcs_pinconf_group_get(struct pinctrl_dev *pctldev, | |
583 | unsigned group, unsigned long *config) | |
584 | { | |
9dddb4df HZ |
585 | const unsigned *pins; |
586 | unsigned npins, old = 0; | |
587 | int i, ret; | |
588 | ||
caeb774e | 589 | ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins); |
9dddb4df HZ |
590 | if (ret) |
591 | return ret; | |
592 | for (i = 0; i < npins; i++) { | |
593 | if (pcs_pinconf_get(pctldev, pins[i], config)) | |
594 | return -ENOTSUPP; | |
595 | /* configs do not match between two pins */ | |
596 | if (i && (old != *config)) | |
597 | return -ENOTSUPP; | |
598 | old = *config; | |
599 | } | |
600 | return 0; | |
8b8b091b TL |
601 | } |
602 | ||
603 | static int pcs_pinconf_group_set(struct pinctrl_dev *pctldev, | |
03b054e9 SY |
604 | unsigned group, unsigned long *configs, |
605 | unsigned num_configs) | |
8b8b091b | 606 | { |
9dddb4df HZ |
607 | const unsigned *pins; |
608 | unsigned npins; | |
609 | int i, ret; | |
610 | ||
caeb774e | 611 | ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins); |
9dddb4df HZ |
612 | if (ret) |
613 | return ret; | |
614 | for (i = 0; i < npins; i++) { | |
03b054e9 | 615 | if (pcs_pinconf_set(pctldev, pins[i], configs, num_configs)) |
9dddb4df HZ |
616 | return -ENOTSUPP; |
617 | } | |
618 | return 0; | |
8b8b091b TL |
619 | } |
620 | ||
621 | static void pcs_pinconf_dbg_show(struct pinctrl_dev *pctldev, | |
9dddb4df | 622 | struct seq_file *s, unsigned pin) |
8b8b091b TL |
623 | { |
624 | } | |
625 | ||
626 | static void pcs_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, | |
627 | struct seq_file *s, unsigned selector) | |
628 | { | |
629 | } | |
630 | ||
9dddb4df HZ |
631 | static void pcs_pinconf_config_dbg_show(struct pinctrl_dev *pctldev, |
632 | struct seq_file *s, | |
633 | unsigned long config) | |
634 | { | |
635 | pinconf_generic_dump_config(pctldev, s, config); | |
636 | } | |
637 | ||
022ab148 | 638 | static const struct pinconf_ops pcs_pinconf_ops = { |
8b8b091b TL |
639 | .pin_config_get = pcs_pinconf_get, |
640 | .pin_config_set = pcs_pinconf_set, | |
641 | .pin_config_group_get = pcs_pinconf_group_get, | |
642 | .pin_config_group_set = pcs_pinconf_group_set, | |
643 | .pin_config_dbg_show = pcs_pinconf_dbg_show, | |
644 | .pin_config_group_dbg_show = pcs_pinconf_group_dbg_show, | |
9dddb4df | 645 | .pin_config_config_dbg_show = pcs_pinconf_config_dbg_show, |
a7bbdd7f | 646 | .is_generic = true, |
8b8b091b TL |
647 | }; |
648 | ||
649 | /** | |
650 | * pcs_add_pin() - add a pin to the static per controller pin array | |
651 | * @pcs: pcs driver instance | |
652 | * @offset: register offset from base | |
653 | */ | |
6f924b0b MP |
654 | static int pcs_add_pin(struct pcs_device *pcs, unsigned offset, |
655 | unsigned pin_pos) | |
8b8b091b | 656 | { |
58968625 | 657 | struct pcs_soc_data *pcs_soc = &pcs->socdata; |
8b8b091b | 658 | struct pinctrl_pin_desc *pin; |
8b8b091b TL |
659 | int i; |
660 | ||
661 | i = pcs->pins.cur; | |
662 | if (i >= pcs->desc.npins) { | |
663 | dev_err(pcs->dev, "too many pins, max %i\n", | |
664 | pcs->desc.npins); | |
665 | return -ENOMEM; | |
666 | } | |
667 | ||
58968625 TL |
668 | if (pcs_soc->irq_enable_mask) { |
669 | unsigned val; | |
670 | ||
671 | val = pcs->read(pcs->base + offset); | |
672 | if (val & pcs_soc->irq_enable_mask) { | |
673 | dev_dbg(pcs->dev, "irq enabled at boot for pin at %lx (%x), clearing\n", | |
674 | (unsigned long)pcs->res->start + offset, val); | |
675 | val &= ~pcs_soc->irq_enable_mask; | |
676 | pcs->write(val, pcs->base + offset); | |
677 | } | |
678 | } | |
679 | ||
8b8b091b | 680 | pin = &pcs->pins.pa[i]; |
8b8b091b TL |
681 | pin->number = i; |
682 | pcs->pins.cur++; | |
683 | ||
684 | return i; | |
685 | } | |
686 | ||
687 | /** | |
688 | * pcs_allocate_pin_table() - adds all the pins for the pinctrl driver | |
689 | * @pcs: pcs driver instance | |
690 | * | |
691 | * In case of errors, resources are freed in pcs_free_resources. | |
692 | * | |
693 | * If your hardware needs holes in the address space, then just set | |
694 | * up multiple driver instances. | |
695 | */ | |
150632b0 | 696 | static int pcs_allocate_pin_table(struct pcs_device *pcs) |
8b8b091b TL |
697 | { |
698 | int mux_bytes, nr_pins, i; | |
6f924b0b | 699 | int num_pins_in_register = 0; |
8b8b091b TL |
700 | |
701 | mux_bytes = pcs->width / BITS_PER_BYTE; | |
4e7e8017 MP |
702 | |
703 | if (pcs->bits_per_mux) { | |
704 | pcs->bits_per_pin = fls(pcs->fmask); | |
705 | nr_pins = (pcs->size * BITS_PER_BYTE) / pcs->bits_per_pin; | |
6f924b0b | 706 | num_pins_in_register = pcs->width / pcs->bits_per_pin; |
4e7e8017 MP |
707 | } else { |
708 | nr_pins = pcs->size / mux_bytes; | |
709 | } | |
8b8b091b TL |
710 | |
711 | dev_dbg(pcs->dev, "allocating %i pins\n", nr_pins); | |
712 | pcs->pins.pa = devm_kzalloc(pcs->dev, | |
713 | sizeof(*pcs->pins.pa) * nr_pins, | |
714 | GFP_KERNEL); | |
715 | if (!pcs->pins.pa) | |
716 | return -ENOMEM; | |
717 | ||
8b8b091b TL |
718 | pcs->desc.pins = pcs->pins.pa; |
719 | pcs->desc.npins = nr_pins; | |
720 | ||
721 | for (i = 0; i < pcs->desc.npins; i++) { | |
722 | unsigned offset; | |
723 | int res; | |
4e7e8017 | 724 | int byte_num; |
6f924b0b | 725 | int pin_pos = 0; |
8b8b091b | 726 | |
4e7e8017 MP |
727 | if (pcs->bits_per_mux) { |
728 | byte_num = (pcs->bits_per_pin * i) / BITS_PER_BYTE; | |
729 | offset = (byte_num / mux_bytes) * mux_bytes; | |
6f924b0b | 730 | pin_pos = i % num_pins_in_register; |
4e7e8017 MP |
731 | } else { |
732 | offset = i * mux_bytes; | |
733 | } | |
6f924b0b | 734 | res = pcs_add_pin(pcs, offset, pin_pos); |
8b8b091b TL |
735 | if (res < 0) { |
736 | dev_err(pcs->dev, "error adding pins: %i\n", res); | |
737 | return res; | |
738 | } | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
744 | /** | |
745 | * pcs_add_function() - adds a new function to the function list | |
746 | * @pcs: pcs driver instance | |
747 | * @np: device node of the mux entry | |
748 | * @name: name of the function | |
749 | * @vals: array of mux register value pairs used by the function | |
750 | * @nvals: number of mux register value pairs | |
751 | * @pgnames: array of pingroup names for the function | |
752 | * @npgnames: number of pingroup names | |
753 | */ | |
754 | static struct pcs_function *pcs_add_function(struct pcs_device *pcs, | |
755 | struct device_node *np, | |
756 | const char *name, | |
757 | struct pcs_func_vals *vals, | |
758 | unsigned nvals, | |
759 | const char **pgnames, | |
760 | unsigned npgnames) | |
761 | { | |
762 | struct pcs_function *function; | |
571aec4d | 763 | int res; |
8b8b091b TL |
764 | |
765 | function = devm_kzalloc(pcs->dev, sizeof(*function), GFP_KERNEL); | |
766 | if (!function) | |
767 | return NULL; | |
768 | ||
8b8b091b TL |
769 | function->vals = vals; |
770 | function->nvals = nvals; | |
8b8b091b | 771 | |
571aec4d TL |
772 | res = pinmux_generic_add_function(pcs->pctl, name, |
773 | pgnames, npgnames, | |
774 | function); | |
775 | if (res) | |
776 | return NULL; | |
8b8b091b TL |
777 | |
778 | return function; | |
779 | } | |
780 | ||
8b8b091b TL |
781 | /** |
782 | * pcs_get_pin_by_offset() - get a pin index based on the register offset | |
783 | * @pcs: pcs driver instance | |
784 | * @offset: register offset from the base | |
785 | * | |
786 | * Note that this is OK as long as the pins are in a static array. | |
787 | */ | |
788 | static int pcs_get_pin_by_offset(struct pcs_device *pcs, unsigned offset) | |
789 | { | |
790 | unsigned index; | |
791 | ||
792 | if (offset >= pcs->size) { | |
793 | dev_err(pcs->dev, "mux offset out of range: 0x%x (0x%x)\n", | |
794 | offset, pcs->size); | |
795 | return -EINVAL; | |
796 | } | |
797 | ||
4e7e8017 MP |
798 | if (pcs->bits_per_mux) |
799 | index = (offset * BITS_PER_BYTE) / pcs->bits_per_pin; | |
800 | else | |
801 | index = offset / (pcs->width / BITS_PER_BYTE); | |
8b8b091b TL |
802 | |
803 | return index; | |
804 | } | |
805 | ||
9dddb4df HZ |
806 | /* |
807 | * check whether data matches enable bits or disable bits | |
808 | * Return value: 1 for matching enable bits, 0 for matching disable bits, | |
809 | * and negative value for matching failure. | |
810 | */ | |
811 | static int pcs_config_match(unsigned data, unsigned enable, unsigned disable) | |
812 | { | |
813 | int ret = -EINVAL; | |
814 | ||
815 | if (data == enable) | |
816 | ret = 1; | |
817 | else if (data == disable) | |
818 | ret = 0; | |
819 | return ret; | |
820 | } | |
821 | ||
822 | static void add_config(struct pcs_conf_vals **conf, enum pin_config_param param, | |
823 | unsigned value, unsigned enable, unsigned disable, | |
824 | unsigned mask) | |
825 | { | |
826 | (*conf)->param = param; | |
827 | (*conf)->val = value; | |
828 | (*conf)->enable = enable; | |
829 | (*conf)->disable = disable; | |
830 | (*conf)->mask = mask; | |
831 | (*conf)++; | |
832 | } | |
833 | ||
834 | static void add_setting(unsigned long **setting, enum pin_config_param param, | |
835 | unsigned arg) | |
836 | { | |
837 | **setting = pinconf_to_config_packed(param, arg); | |
838 | (*setting)++; | |
839 | } | |
840 | ||
841 | /* add pinconf setting with 2 parameters */ | |
842 | static void pcs_add_conf2(struct pcs_device *pcs, struct device_node *np, | |
843 | const char *name, enum pin_config_param param, | |
844 | struct pcs_conf_vals **conf, unsigned long **settings) | |
845 | { | |
7cba5b3f | 846 | unsigned value[2], shift; |
9dddb4df HZ |
847 | int ret; |
848 | ||
849 | ret = of_property_read_u32_array(np, name, value, 2); | |
850 | if (ret) | |
851 | return; | |
852 | /* set value & mask */ | |
853 | value[0] &= value[1]; | |
7cba5b3f | 854 | shift = ffs(value[1]) - 1; |
9dddb4df HZ |
855 | /* skip enable & disable */ |
856 | add_config(conf, param, value[0], 0, 0, value[1]); | |
7cba5b3f | 857 | add_setting(settings, param, value[0] >> shift); |
9dddb4df HZ |
858 | } |
859 | ||
860 | /* add pinconf setting with 4 parameters */ | |
861 | static void pcs_add_conf4(struct pcs_device *pcs, struct device_node *np, | |
862 | const char *name, enum pin_config_param param, | |
863 | struct pcs_conf_vals **conf, unsigned long **settings) | |
864 | { | |
865 | unsigned value[4]; | |
866 | int ret; | |
867 | ||
868 | /* value to set, enable, disable, mask */ | |
869 | ret = of_property_read_u32_array(np, name, value, 4); | |
870 | if (ret) | |
871 | return; | |
872 | if (!value[3]) { | |
873 | dev_err(pcs->dev, "mask field of the property can't be 0\n"); | |
874 | return; | |
875 | } | |
876 | value[0] &= value[3]; | |
877 | value[1] &= value[3]; | |
878 | value[2] &= value[3]; | |
879 | ret = pcs_config_match(value[0], value[1], value[2]); | |
880 | if (ret < 0) | |
881 | dev_dbg(pcs->dev, "failed to match enable or disable bits\n"); | |
882 | add_config(conf, param, value[0], value[1], value[2], value[3]); | |
883 | add_setting(settings, param, ret); | |
884 | } | |
885 | ||
886 | static int pcs_parse_pinconf(struct pcs_device *pcs, struct device_node *np, | |
887 | struct pcs_function *func, | |
888 | struct pinctrl_map **map) | |
889 | ||
890 | { | |
891 | struct pinctrl_map *m = *map; | |
892 | int i = 0, nconfs = 0; | |
893 | unsigned long *settings = NULL, *s = NULL; | |
894 | struct pcs_conf_vals *conf = NULL; | |
b582658a | 895 | static const struct pcs_conf_type prop2[] = { |
9dddb4df HZ |
896 | { "pinctrl-single,drive-strength", PIN_CONFIG_DRIVE_STRENGTH, }, |
897 | { "pinctrl-single,slew-rate", PIN_CONFIG_SLEW_RATE, }, | |
898 | { "pinctrl-single,input-schmitt", PIN_CONFIG_INPUT_SCHMITT, }, | |
4bd75477 | 899 | { "pinctrl-single,low-power-mode", PIN_CONFIG_LOW_POWER_MODE, }, |
9dddb4df | 900 | }; |
b582658a | 901 | static const struct pcs_conf_type prop4[] = { |
9dddb4df HZ |
902 | { "pinctrl-single,bias-pullup", PIN_CONFIG_BIAS_PULL_UP, }, |
903 | { "pinctrl-single,bias-pulldown", PIN_CONFIG_BIAS_PULL_DOWN, }, | |
904 | { "pinctrl-single,input-schmitt-enable", | |
905 | PIN_CONFIG_INPUT_SCHMITT_ENABLE, }, | |
906 | }; | |
907 | ||
908 | /* If pinconf isn't supported, don't parse properties in below. */ | |
02e483f6 | 909 | if (!PCS_HAS_PINCONF) |
9dddb4df HZ |
910 | return 0; |
911 | ||
912 | /* cacluate how much properties are supported in current node */ | |
913 | for (i = 0; i < ARRAY_SIZE(prop2); i++) { | |
914 | if (of_find_property(np, prop2[i].name, NULL)) | |
915 | nconfs++; | |
916 | } | |
917 | for (i = 0; i < ARRAY_SIZE(prop4); i++) { | |
918 | if (of_find_property(np, prop4[i].name, NULL)) | |
919 | nconfs++; | |
920 | } | |
921 | if (!nconfs) | |
922 | return 0; | |
923 | ||
924 | func->conf = devm_kzalloc(pcs->dev, | |
925 | sizeof(struct pcs_conf_vals) * nconfs, | |
926 | GFP_KERNEL); | |
927 | if (!func->conf) | |
928 | return -ENOMEM; | |
929 | func->nconfs = nconfs; | |
930 | conf = &(func->conf[0]); | |
931 | m++; | |
932 | settings = devm_kzalloc(pcs->dev, sizeof(unsigned long) * nconfs, | |
933 | GFP_KERNEL); | |
934 | if (!settings) | |
935 | return -ENOMEM; | |
936 | s = &settings[0]; | |
937 | ||
938 | for (i = 0; i < ARRAY_SIZE(prop2); i++) | |
939 | pcs_add_conf2(pcs, np, prop2[i].name, prop2[i].param, | |
940 | &conf, &s); | |
941 | for (i = 0; i < ARRAY_SIZE(prop4); i++) | |
942 | pcs_add_conf4(pcs, np, prop4[i].name, prop4[i].param, | |
943 | &conf, &s); | |
944 | m->type = PIN_MAP_TYPE_CONFIGS_GROUP; | |
945 | m->data.configs.group_or_pin = np->name; | |
946 | m->data.configs.configs = settings; | |
947 | m->data.configs.num_configs = nconfs; | |
948 | return 0; | |
949 | } | |
950 | ||
8b8b091b TL |
951 | /** |
952 | * smux_parse_one_pinctrl_entry() - parses a device tree mux entry | |
caeb774e | 953 | * @pctldev: pin controller device |
8b8b091b TL |
954 | * @pcs: pinctrl driver instance |
955 | * @np: device node of the mux entry | |
956 | * @map: map entry | |
9dddb4df | 957 | * @num_maps: number of map |
8b8b091b TL |
958 | * @pgnames: pingroup names |
959 | * | |
960 | * Note that this binding currently supports only sets of one register + value. | |
961 | * | |
962 | * Also note that this driver tries to avoid understanding pin and function | |
963 | * names because of the extra bloat they would cause especially in the case of | |
964 | * a large number of pins. This driver just sets what is specified for the board | |
965 | * in the .dts file. Further user space debugging tools can be developed to | |
966 | * decipher the pin and function names using debugfs. | |
967 | * | |
968 | * If you are concerned about the boot time, set up the static pins in | |
969 | * the bootloader, and only set up selected pins as device tree entries. | |
970 | */ | |
971 | static int pcs_parse_one_pinctrl_entry(struct pcs_device *pcs, | |
972 | struct device_node *np, | |
973 | struct pinctrl_map **map, | |
9dddb4df | 974 | unsigned *num_maps, |
8b8b091b TL |
975 | const char **pgnames) |
976 | { | |
4622215f | 977 | const char *name = "pinctrl-single,pins"; |
8b8b091b | 978 | struct pcs_func_vals *vals; |
4622215f | 979 | int rows, *pins, found = 0, res = -ENOMEM, i; |
8b8b091b TL |
980 | struct pcs_function *function; |
981 | ||
4622215f | 982 | rows = pinctrl_count_index_with_args(np, name); |
de7416bc | 983 | if (rows <= 0) { |
059a6e63 | 984 | dev_err(pcs->dev, "Invalid number of rows: %d\n", rows); |
de7416bc AH |
985 | return -EINVAL; |
986 | } | |
8b8b091b TL |
987 | |
988 | vals = devm_kzalloc(pcs->dev, sizeof(*vals) * rows, GFP_KERNEL); | |
989 | if (!vals) | |
990 | return -ENOMEM; | |
991 | ||
992 | pins = devm_kzalloc(pcs->dev, sizeof(*pins) * rows, GFP_KERNEL); | |
993 | if (!pins) | |
994 | goto free_vals; | |
995 | ||
4622215f TL |
996 | for (i = 0; i < rows; i++) { |
997 | struct of_phandle_args pinctrl_spec; | |
998 | unsigned int offset; | |
8b8b091b TL |
999 | int pin; |
1000 | ||
4622215f TL |
1001 | res = pinctrl_parse_index_with_args(np, name, i, &pinctrl_spec); |
1002 | if (res) | |
1003 | return res; | |
1004 | ||
1005 | if (pinctrl_spec.args_count < 2) { | |
1006 | dev_err(pcs->dev, "invalid args_count for spec: %i\n", | |
1007 | pinctrl_spec.args_count); | |
1008 | break; | |
1009 | } | |
1010 | ||
1011 | /* Index plus one value cell */ | |
1012 | offset = pinctrl_spec.args[0]; | |
8b8b091b | 1013 | vals[found].reg = pcs->base + offset; |
4622215f TL |
1014 | vals[found].val = pinctrl_spec.args[1]; |
1015 | ||
1016 | dev_dbg(pcs->dev, "%s index: 0x%x value: 0x%x\n", | |
1017 | pinctrl_spec.np->name, offset, pinctrl_spec.args[1]); | |
8b8b091b TL |
1018 | |
1019 | pin = pcs_get_pin_by_offset(pcs, offset); | |
1020 | if (pin < 0) { | |
1021 | dev_err(pcs->dev, | |
1022 | "could not add functions for %s %ux\n", | |
1023 | np->name, offset); | |
1024 | break; | |
1025 | } | |
1026 | pins[found++] = pin; | |
1027 | } | |
1028 | ||
1029 | pgnames[0] = np->name; | |
1030 | function = pcs_add_function(pcs, np, np->name, vals, found, pgnames, 1); | |
712778d0 DC |
1031 | if (!function) { |
1032 | res = -ENOMEM; | |
8b8b091b | 1033 | goto free_pins; |
712778d0 | 1034 | } |
8b8b091b | 1035 | |
caeb774e | 1036 | res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs); |
8b8b091b TL |
1037 | if (res < 0) |
1038 | goto free_function; | |
1039 | ||
1040 | (*map)->type = PIN_MAP_TYPE_MUX_GROUP; | |
1041 | (*map)->data.mux.group = np->name; | |
1042 | (*map)->data.mux.function = np->name; | |
1043 | ||
02e483f6 | 1044 | if (PCS_HAS_PINCONF) { |
18442e65 WY |
1045 | res = pcs_parse_pinconf(pcs, np, function, map); |
1046 | if (res) | |
9dddb4df HZ |
1047 | goto free_pingroups; |
1048 | *num_maps = 2; | |
1049 | } else { | |
1050 | *num_maps = 1; | |
1051 | } | |
8b8b091b TL |
1052 | return 0; |
1053 | ||
9dddb4df | 1054 | free_pingroups: |
caeb774e | 1055 | pinctrl_generic_remove_last_group(pcs->pctl); |
9dddb4df | 1056 | *num_maps = 1; |
8b8b091b | 1057 | free_function: |
571aec4d | 1058 | pinmux_generic_remove_last_function(pcs->pctl); |
8b8b091b TL |
1059 | |
1060 | free_pins: | |
1061 | devm_kfree(pcs->dev, pins); | |
1062 | ||
4e7e8017 MP |
1063 | free_vals: |
1064 | devm_kfree(pcs->dev, vals); | |
1065 | ||
1066 | return res; | |
1067 | } | |
1068 | ||
4e7e8017 MP |
1069 | static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs, |
1070 | struct device_node *np, | |
1071 | struct pinctrl_map **map, | |
1072 | unsigned *num_maps, | |
1073 | const char **pgnames) | |
1074 | { | |
dd68a526 | 1075 | const char *name = "pinctrl-single,bits"; |
4e7e8017 | 1076 | struct pcs_func_vals *vals; |
22d5127e | 1077 | int rows, *pins, found = 0, res = -ENOMEM, i; |
4e7e8017 MP |
1078 | int npins_in_row; |
1079 | struct pcs_function *function; | |
1080 | ||
22d5127e | 1081 | rows = pinctrl_count_index_with_args(np, name); |
de7416bc AH |
1082 | if (rows <= 0) { |
1083 | dev_err(pcs->dev, "Invalid number of rows: %d\n", rows); | |
1084 | return -EINVAL; | |
1085 | } | |
4e7e8017 | 1086 | |
4e7e8017 MP |
1087 | npins_in_row = pcs->width / pcs->bits_per_pin; |
1088 | ||
1089 | vals = devm_kzalloc(pcs->dev, sizeof(*vals) * rows * npins_in_row, | |
1090 | GFP_KERNEL); | |
1091 | if (!vals) | |
1092 | return -ENOMEM; | |
1093 | ||
1094 | pins = devm_kzalloc(pcs->dev, sizeof(*pins) * rows * npins_in_row, | |
1095 | GFP_KERNEL); | |
1096 | if (!pins) | |
1097 | goto free_vals; | |
1098 | ||
22d5127e TL |
1099 | for (i = 0; i < rows; i++) { |
1100 | struct of_phandle_args pinctrl_spec; | |
4e7e8017 MP |
1101 | unsigned offset, val; |
1102 | unsigned mask, bit_pos, val_pos, mask_pos, submask; | |
1103 | unsigned pin_num_from_lsb; | |
1104 | int pin; | |
1105 | ||
22d5127e TL |
1106 | res = pinctrl_parse_index_with_args(np, name, i, &pinctrl_spec); |
1107 | if (res) | |
1108 | return res; | |
1109 | ||
1110 | if (pinctrl_spec.args_count < 3) { | |
1111 | dev_err(pcs->dev, "invalid args_count for spec: %i\n", | |
1112 | pinctrl_spec.args_count); | |
1113 | break; | |
1114 | } | |
1115 | ||
1116 | /* Index plus two value cells */ | |
1117 | offset = pinctrl_spec.args[0]; | |
1118 | val = pinctrl_spec.args[1]; | |
1119 | mask = pinctrl_spec.args[2]; | |
1120 | ||
1121 | dev_dbg(pcs->dev, "%s index: 0x%x value: 0x%x mask: 0x%x\n", | |
1122 | pinctrl_spec.np->name, offset, val, mask); | |
4e7e8017 MP |
1123 | |
1124 | /* Parse pins in each row from LSB */ | |
1125 | while (mask) { | |
56b367c0 | 1126 | bit_pos = __ffs(mask); |
4e7e8017 | 1127 | pin_num_from_lsb = bit_pos / pcs->bits_per_pin; |
56b367c0 | 1128 | mask_pos = ((pcs->fmask) << bit_pos); |
4e7e8017 MP |
1129 | val_pos = val & mask_pos; |
1130 | submask = mask & mask_pos; | |
ad5d25fe TV |
1131 | |
1132 | if ((mask & mask_pos) == 0) { | |
1133 | dev_err(pcs->dev, | |
1134 | "Invalid mask for %s at 0x%x\n", | |
1135 | np->name, offset); | |
1136 | break; | |
1137 | } | |
1138 | ||
4e7e8017 MP |
1139 | mask &= ~mask_pos; |
1140 | ||
1141 | if (submask != mask_pos) { | |
1142 | dev_warn(pcs->dev, | |
1143 | "Invalid submask 0x%x for %s at 0x%x\n", | |
1144 | submask, np->name, offset); | |
1145 | continue; | |
1146 | } | |
1147 | ||
1148 | vals[found].mask = submask; | |
1149 | vals[found].reg = pcs->base + offset; | |
1150 | vals[found].val = val_pos; | |
1151 | ||
1152 | pin = pcs_get_pin_by_offset(pcs, offset); | |
1153 | if (pin < 0) { | |
1154 | dev_err(pcs->dev, | |
1155 | "could not add functions for %s %ux\n", | |
1156 | np->name, offset); | |
1157 | break; | |
1158 | } | |
1159 | pins[found++] = pin + pin_num_from_lsb; | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | pgnames[0] = np->name; | |
1164 | function = pcs_add_function(pcs, np, np->name, vals, found, pgnames, 1); | |
712778d0 DC |
1165 | if (!function) { |
1166 | res = -ENOMEM; | |
4e7e8017 | 1167 | goto free_pins; |
712778d0 | 1168 | } |
4e7e8017 | 1169 | |
caeb774e | 1170 | res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs); |
4e7e8017 MP |
1171 | if (res < 0) |
1172 | goto free_function; | |
1173 | ||
1174 | (*map)->type = PIN_MAP_TYPE_MUX_GROUP; | |
1175 | (*map)->data.mux.group = np->name; | |
1176 | (*map)->data.mux.function = np->name; | |
1177 | ||
02e483f6 | 1178 | if (PCS_HAS_PINCONF) { |
4e7e8017 MP |
1179 | dev_err(pcs->dev, "pinconf not supported\n"); |
1180 | goto free_pingroups; | |
1181 | } | |
1182 | ||
1183 | *num_maps = 1; | |
1184 | return 0; | |
1185 | ||
1186 | free_pingroups: | |
caeb774e | 1187 | pinctrl_generic_remove_last_group(pcs->pctl); |
4e7e8017 MP |
1188 | *num_maps = 1; |
1189 | free_function: | |
571aec4d | 1190 | pinmux_generic_remove_last_function(pcs->pctl); |
4e7e8017 MP |
1191 | free_pins: |
1192 | devm_kfree(pcs->dev, pins); | |
1193 | ||
8b8b091b TL |
1194 | free_vals: |
1195 | devm_kfree(pcs->dev, vals); | |
1196 | ||
1197 | return res; | |
1198 | } | |
1199 | /** | |
1200 | * pcs_dt_node_to_map() - allocates and parses pinctrl maps | |
1201 | * @pctldev: pinctrl instance | |
1202 | * @np_config: device tree pinmux entry | |
1203 | * @map: array of map entries | |
1204 | * @num_maps: number of maps | |
1205 | */ | |
1206 | static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev, | |
1207 | struct device_node *np_config, | |
1208 | struct pinctrl_map **map, unsigned *num_maps) | |
1209 | { | |
1210 | struct pcs_device *pcs; | |
1211 | const char **pgnames; | |
1212 | int ret; | |
1213 | ||
1214 | pcs = pinctrl_dev_get_drvdata(pctldev); | |
1215 | ||
9dddb4df HZ |
1216 | /* create 2 maps. One is for pinmux, and the other is for pinconf. */ |
1217 | *map = devm_kzalloc(pcs->dev, sizeof(**map) * 2, GFP_KERNEL); | |
00e79d12 | 1218 | if (!*map) |
8b8b091b TL |
1219 | return -ENOMEM; |
1220 | ||
1221 | *num_maps = 0; | |
1222 | ||
1223 | pgnames = devm_kzalloc(pcs->dev, sizeof(*pgnames), GFP_KERNEL); | |
1224 | if (!pgnames) { | |
1225 | ret = -ENOMEM; | |
1226 | goto free_map; | |
1227 | } | |
1228 | ||
4e7e8017 MP |
1229 | if (pcs->bits_per_mux) { |
1230 | ret = pcs_parse_bits_in_pinctrl_entry(pcs, np_config, map, | |
1231 | num_maps, pgnames); | |
1232 | if (ret < 0) { | |
1233 | dev_err(pcs->dev, "no pins entries for %s\n", | |
1234 | np_config->name); | |
1235 | goto free_pgnames; | |
1236 | } | |
1237 | } else { | |
1238 | ret = pcs_parse_one_pinctrl_entry(pcs, np_config, map, | |
1239 | num_maps, pgnames); | |
1240 | if (ret < 0) { | |
1241 | dev_err(pcs->dev, "no pins entries for %s\n", | |
1242 | np_config->name); | |
1243 | goto free_pgnames; | |
1244 | } | |
8b8b091b | 1245 | } |
8b8b091b TL |
1246 | |
1247 | return 0; | |
1248 | ||
1249 | free_pgnames: | |
1250 | devm_kfree(pcs->dev, pgnames); | |
1251 | free_map: | |
1252 | devm_kfree(pcs->dev, *map); | |
1253 | ||
1254 | return ret; | |
1255 | } | |
1256 | ||
3e6cee17 TL |
1257 | /** |
1258 | * pcs_irq_free() - free interrupt | |
1259 | * @pcs: pcs driver instance | |
1260 | */ | |
1261 | static void pcs_irq_free(struct pcs_device *pcs) | |
1262 | { | |
1263 | struct pcs_soc_data *pcs_soc = &pcs->socdata; | |
1264 | ||
1265 | if (pcs_soc->irq < 0) | |
1266 | return; | |
1267 | ||
1268 | if (pcs->domain) | |
1269 | irq_domain_remove(pcs->domain); | |
1270 | ||
1271 | if (PCS_QUIRK_HAS_SHARED_IRQ) | |
1272 | free_irq(pcs_soc->irq, pcs_soc); | |
1273 | else | |
1274 | irq_set_chained_handler(pcs_soc->irq, NULL); | |
1275 | } | |
1276 | ||
8b8b091b TL |
1277 | /** |
1278 | * pcs_free_resources() - free memory used by this driver | |
1279 | * @pcs: pcs driver instance | |
1280 | */ | |
1281 | static void pcs_free_resources(struct pcs_device *pcs) | |
1282 | { | |
3e6cee17 | 1283 | pcs_irq_free(pcs); |
f10a2585 | 1284 | pinctrl_unregister(pcs->pctl); |
caeb774e | 1285 | |
4622215f TL |
1286 | #if IS_BUILTIN(CONFIG_PINCTRL_SINGLE) |
1287 | if (pcs->missing_nr_pinctrl_cells) | |
1288 | of_remove_property(pcs->np, pcs->missing_nr_pinctrl_cells); | |
1289 | #endif | |
8b8b091b TL |
1290 | } |
1291 | ||
a1a277eb HZ |
1292 | static int pcs_add_gpio_func(struct device_node *node, struct pcs_device *pcs) |
1293 | { | |
1294 | const char *propname = "pinctrl-single,gpio-range"; | |
1295 | const char *cellname = "#pinctrl-single,gpio-range-cells"; | |
1296 | struct of_phandle_args gpiospec; | |
1297 | struct pcs_gpiofunc_range *range; | |
1298 | int ret, i; | |
1299 | ||
1300 | for (i = 0; ; i++) { | |
1301 | ret = of_parse_phandle_with_args(node, propname, cellname, | |
1302 | i, &gpiospec); | |
1303 | /* Do not treat it as error. Only treat it as end condition. */ | |
1304 | if (ret) { | |
1305 | ret = 0; | |
1306 | break; | |
1307 | } | |
1308 | range = devm_kzalloc(pcs->dev, sizeof(*range), GFP_KERNEL); | |
1309 | if (!range) { | |
1310 | ret = -ENOMEM; | |
1311 | break; | |
1312 | } | |
1313 | range->offset = gpiospec.args[0]; | |
1314 | range->npins = gpiospec.args[1]; | |
1315 | range->gpiofunc = gpiospec.args[2]; | |
1316 | mutex_lock(&pcs->mutex); | |
1317 | list_add_tail(&range->node, &pcs->gpiofuncs); | |
1318 | mutex_unlock(&pcs->mutex); | |
1319 | } | |
1320 | return ret; | |
1321 | } | |
3e6cee17 TL |
1322 | /** |
1323 | * @reg: virtual address of interrupt register | |
1324 | * @hwirq: hardware irq number | |
1325 | * @irq: virtual irq number | |
1326 | * @node: list node | |
1327 | */ | |
1328 | struct pcs_interrupt { | |
1329 | void __iomem *reg; | |
1330 | irq_hw_number_t hwirq; | |
1331 | unsigned int irq; | |
1332 | struct list_head node; | |
1333 | }; | |
1334 | ||
1335 | /** | |
1336 | * pcs_irq_set() - enables or disables an interrupt | |
1337 | * | |
1338 | * Note that this currently assumes one interrupt per pinctrl | |
1339 | * register that is typically used for wake-up events. | |
1340 | */ | |
1341 | static inline void pcs_irq_set(struct pcs_soc_data *pcs_soc, | |
1342 | int irq, const bool enable) | |
1343 | { | |
1344 | struct pcs_device *pcs; | |
1345 | struct list_head *pos; | |
1346 | unsigned mask; | |
1347 | ||
1348 | pcs = container_of(pcs_soc, struct pcs_device, socdata); | |
1349 | list_for_each(pos, &pcs->irqs) { | |
1350 | struct pcs_interrupt *pcswi; | |
1351 | unsigned soc_mask; | |
1352 | ||
1353 | pcswi = list_entry(pos, struct pcs_interrupt, node); | |
1354 | if (irq != pcswi->irq) | |
1355 | continue; | |
1356 | ||
1357 | soc_mask = pcs_soc->irq_enable_mask; | |
1358 | raw_spin_lock(&pcs->lock); | |
1359 | mask = pcs->read(pcswi->reg); | |
1360 | if (enable) | |
1361 | mask |= soc_mask; | |
1362 | else | |
1363 | mask &= ~soc_mask; | |
1364 | pcs->write(mask, pcswi->reg); | |
0ac3c0a4 TL |
1365 | |
1366 | /* flush posted write */ | |
1367 | mask = pcs->read(pcswi->reg); | |
3e6cee17 TL |
1368 | raw_spin_unlock(&pcs->lock); |
1369 | } | |
c9b3a7d2 RQ |
1370 | |
1371 | if (pcs_soc->rearm) | |
1372 | pcs_soc->rearm(); | |
3e6cee17 TL |
1373 | } |
1374 | ||
1375 | /** | |
1376 | * pcs_irq_mask() - mask pinctrl interrupt | |
1377 | * @d: interrupt data | |
1378 | */ | |
1379 | static void pcs_irq_mask(struct irq_data *d) | |
1380 | { | |
1381 | struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d); | |
1382 | ||
1383 | pcs_irq_set(pcs_soc, d->irq, false); | |
1384 | } | |
1385 | ||
1386 | /** | |
1387 | * pcs_irq_unmask() - unmask pinctrl interrupt | |
1388 | * @d: interrupt data | |
1389 | */ | |
1390 | static void pcs_irq_unmask(struct irq_data *d) | |
1391 | { | |
1392 | struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d); | |
1393 | ||
1394 | pcs_irq_set(pcs_soc, d->irq, true); | |
1395 | } | |
1396 | ||
1397 | /** | |
1398 | * pcs_irq_set_wake() - toggle the suspend and resume wake up | |
1399 | * @d: interrupt data | |
1400 | * @state: wake-up state | |
1401 | * | |
1402 | * Note that this should be called only for suspend and resume. | |
1403 | * For runtime PM, the wake-up events should be enabled by default. | |
1404 | */ | |
1405 | static int pcs_irq_set_wake(struct irq_data *d, unsigned int state) | |
1406 | { | |
1407 | if (state) | |
1408 | pcs_irq_unmask(d); | |
1409 | else | |
1410 | pcs_irq_mask(d); | |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | /** | |
1416 | * pcs_irq_handle() - common interrupt handler | |
1417 | * @pcs_irq: interrupt data | |
1418 | * | |
1419 | * Note that this currently assumes we have one interrupt bit per | |
1420 | * mux register. This interrupt is typically used for wake-up events. | |
1421 | * For more complex interrupts different handlers can be specified. | |
1422 | */ | |
1423 | static int pcs_irq_handle(struct pcs_soc_data *pcs_soc) | |
1424 | { | |
1425 | struct pcs_device *pcs; | |
1426 | struct list_head *pos; | |
1427 | int count = 0; | |
1428 | ||
1429 | pcs = container_of(pcs_soc, struct pcs_device, socdata); | |
1430 | list_for_each(pos, &pcs->irqs) { | |
1431 | struct pcs_interrupt *pcswi; | |
1432 | unsigned mask; | |
1433 | ||
1434 | pcswi = list_entry(pos, struct pcs_interrupt, node); | |
1435 | raw_spin_lock(&pcs->lock); | |
1436 | mask = pcs->read(pcswi->reg); | |
1437 | raw_spin_unlock(&pcs->lock); | |
1438 | if (mask & pcs_soc->irq_status_mask) { | |
1439 | generic_handle_irq(irq_find_mapping(pcs->domain, | |
1440 | pcswi->hwirq)); | |
1441 | count++; | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | return count; | |
1446 | } | |
1447 | ||
1448 | /** | |
1449 | * pcs_irq_handler() - handler for the shared interrupt case | |
1450 | * @irq: interrupt | |
1451 | * @d: data | |
1452 | * | |
1453 | * Use this for cases where multiple instances of | |
1454 | * pinctrl-single share a single interrupt like on omaps. | |
1455 | */ | |
1456 | static irqreturn_t pcs_irq_handler(int irq, void *d) | |
1457 | { | |
1458 | struct pcs_soc_data *pcs_soc = d; | |
1459 | ||
1460 | return pcs_irq_handle(pcs_soc) ? IRQ_HANDLED : IRQ_NONE; | |
1461 | } | |
1462 | ||
1463 | /** | |
1464 | * pcs_irq_handle() - handler for the dedicated chained interrupt case | |
1465 | * @irq: interrupt | |
1466 | * @desc: interrupt descriptor | |
1467 | * | |
1468 | * Use this if you have a separate interrupt for each | |
1469 | * pinctrl-single instance. | |
1470 | */ | |
bd0b9ac4 | 1471 | static void pcs_irq_chain_handler(struct irq_desc *desc) |
3e6cee17 TL |
1472 | { |
1473 | struct pcs_soc_data *pcs_soc = irq_desc_get_handler_data(desc); | |
1474 | struct irq_chip *chip; | |
3e6cee17 | 1475 | |
5663bb27 | 1476 | chip = irq_desc_get_chip(desc); |
3e6cee17 | 1477 | chained_irq_enter(chip, desc); |
849bfe06 | 1478 | pcs_irq_handle(pcs_soc); |
3e6cee17 TL |
1479 | /* REVISIT: export and add handle_bad_irq(irq, desc)? */ |
1480 | chained_irq_exit(chip, desc); | |
3e6cee17 TL |
1481 | } |
1482 | ||
1483 | static int pcs_irqdomain_map(struct irq_domain *d, unsigned int irq, | |
1484 | irq_hw_number_t hwirq) | |
1485 | { | |
1486 | struct pcs_soc_data *pcs_soc = d->host_data; | |
1487 | struct pcs_device *pcs; | |
1488 | struct pcs_interrupt *pcswi; | |
1489 | ||
1490 | pcs = container_of(pcs_soc, struct pcs_device, socdata); | |
1491 | pcswi = devm_kzalloc(pcs->dev, sizeof(*pcswi), GFP_KERNEL); | |
1492 | if (!pcswi) | |
1493 | return -ENOMEM; | |
1494 | ||
1495 | pcswi->reg = pcs->base + hwirq; | |
1496 | pcswi->hwirq = hwirq; | |
1497 | pcswi->irq = irq; | |
1498 | ||
1499 | mutex_lock(&pcs->mutex); | |
1500 | list_add_tail(&pcswi->node, &pcs->irqs); | |
1501 | mutex_unlock(&pcs->mutex); | |
1502 | ||
1503 | irq_set_chip_data(irq, pcs_soc); | |
1504 | irq_set_chip_and_handler(irq, &pcs->chip, | |
1505 | handle_level_irq); | |
39c3fd58 | 1506 | irq_set_lockdep_class(irq, &pcs_lock_class, &pcs_request_class); |
1b9c0fb3 | 1507 | irq_set_noprobe(irq); |
3e6cee17 TL |
1508 | |
1509 | return 0; | |
1510 | } | |
1511 | ||
e5b60953 | 1512 | static const struct irq_domain_ops pcs_irqdomain_ops = { |
3e6cee17 TL |
1513 | .map = pcs_irqdomain_map, |
1514 | .xlate = irq_domain_xlate_onecell, | |
1515 | }; | |
1516 | ||
1517 | /** | |
1518 | * pcs_irq_init_chained_handler() - set up a chained interrupt handler | |
1519 | * @pcs: pcs driver instance | |
1520 | * @np: device node pointer | |
1521 | */ | |
1522 | static int pcs_irq_init_chained_handler(struct pcs_device *pcs, | |
1523 | struct device_node *np) | |
1524 | { | |
1525 | struct pcs_soc_data *pcs_soc = &pcs->socdata; | |
1526 | const char *name = "pinctrl"; | |
1527 | int num_irqs; | |
1528 | ||
1529 | if (!pcs_soc->irq_enable_mask || | |
1530 | !pcs_soc->irq_status_mask) { | |
1531 | pcs_soc->irq = -1; | |
1532 | return -EINVAL; | |
1533 | } | |
1534 | ||
1535 | INIT_LIST_HEAD(&pcs->irqs); | |
1536 | pcs->chip.name = name; | |
1537 | pcs->chip.irq_ack = pcs_irq_mask; | |
1538 | pcs->chip.irq_mask = pcs_irq_mask; | |
1539 | pcs->chip.irq_unmask = pcs_irq_unmask; | |
1540 | pcs->chip.irq_set_wake = pcs_irq_set_wake; | |
1541 | ||
1542 | if (PCS_QUIRK_HAS_SHARED_IRQ) { | |
1543 | int res; | |
1544 | ||
1545 | res = request_irq(pcs_soc->irq, pcs_irq_handler, | |
c10372e6 GS |
1546 | IRQF_SHARED | IRQF_NO_SUSPEND | |
1547 | IRQF_NO_THREAD, | |
3e6cee17 TL |
1548 | name, pcs_soc); |
1549 | if (res) { | |
1550 | pcs_soc->irq = -1; | |
1551 | return res; | |
1552 | } | |
1553 | } else { | |
20d5d142 TG |
1554 | irq_set_chained_handler_and_data(pcs_soc->irq, |
1555 | pcs_irq_chain_handler, | |
1556 | pcs_soc); | |
3e6cee17 TL |
1557 | } |
1558 | ||
1559 | /* | |
1560 | * We can use the register offset as the hardirq | |
1561 | * number as irq_domain_add_simple maps them lazily. | |
1562 | * This way we can easily support more than one | |
1563 | * interrupt per function if needed. | |
1564 | */ | |
1565 | num_irqs = pcs->size; | |
1566 | ||
1567 | pcs->domain = irq_domain_add_simple(np, num_irqs, 0, | |
1568 | &pcs_irqdomain_ops, | |
1569 | pcs_soc); | |
1570 | if (!pcs->domain) { | |
1571 | irq_set_chained_handler(pcs_soc->irq, NULL); | |
1572 | return -EINVAL; | |
1573 | } | |
1574 | ||
1575 | return 0; | |
1576 | } | |
a1a277eb | 1577 | |
8cb440ab | 1578 | #ifdef CONFIG_PM |
0f9bc4bc HG |
1579 | static int pinctrl_single_suspend(struct platform_device *pdev, |
1580 | pm_message_t state) | |
1581 | { | |
1582 | struct pcs_device *pcs; | |
1583 | ||
1584 | pcs = platform_get_drvdata(pdev); | |
1585 | if (!pcs) | |
1586 | return -EINVAL; | |
1587 | ||
1588 | return pinctrl_force_sleep(pcs->pctl); | |
1589 | } | |
1590 | ||
1591 | static int pinctrl_single_resume(struct platform_device *pdev) | |
1592 | { | |
1593 | struct pcs_device *pcs; | |
1594 | ||
1595 | pcs = platform_get_drvdata(pdev); | |
1596 | if (!pcs) | |
1597 | return -EINVAL; | |
1598 | ||
1599 | return pinctrl_force_default(pcs->pctl); | |
1600 | } | |
8cb440ab | 1601 | #endif |
0f9bc4bc | 1602 | |
4622215f TL |
1603 | /** |
1604 | * pcs_quirk_missing_pinctrl_cells - handle legacy binding | |
1605 | * @pcs: pinctrl driver instance | |
1606 | * @np: device tree node | |
1607 | * @cells: number of cells | |
1608 | * | |
1609 | * Handle legacy binding with no #pinctrl-cells. This should be | |
1610 | * always two pinctrl-single,bit-per-mux and one for others. | |
1611 | * At some point we may want to consider removing this. | |
1612 | */ | |
1613 | static int pcs_quirk_missing_pinctrl_cells(struct pcs_device *pcs, | |
1614 | struct device_node *np, | |
1615 | int cells) | |
1616 | { | |
1617 | struct property *p; | |
1618 | const char *name = "#pinctrl-cells"; | |
1619 | int error; | |
1620 | u32 val; | |
1621 | ||
1622 | error = of_property_read_u32(np, name, &val); | |
1623 | if (!error) | |
1624 | return 0; | |
1625 | ||
1626 | dev_warn(pcs->dev, "please update dts to use %s = <%i>\n", | |
1627 | name, cells); | |
1628 | ||
1629 | p = devm_kzalloc(pcs->dev, sizeof(*p), GFP_KERNEL); | |
1630 | if (!p) | |
1631 | return -ENOMEM; | |
1632 | ||
1633 | p->length = sizeof(__be32); | |
1634 | p->value = devm_kzalloc(pcs->dev, sizeof(__be32), GFP_KERNEL); | |
1635 | if (!p->value) | |
1636 | return -ENOMEM; | |
1637 | *(__be32 *)p->value = cpu_to_be32(cells); | |
1638 | ||
1639 | p->name = devm_kstrdup(pcs->dev, name, GFP_KERNEL); | |
1640 | if (!p->name) | |
1641 | return -ENOMEM; | |
1642 | ||
1643 | pcs->missing_nr_pinctrl_cells = p; | |
1644 | ||
1645 | #if IS_BUILTIN(CONFIG_PINCTRL_SINGLE) | |
1646 | error = of_add_property(np, pcs->missing_nr_pinctrl_cells); | |
1647 | #endif | |
1648 | ||
1649 | return error; | |
1650 | } | |
1651 | ||
150632b0 | 1652 | static int pcs_probe(struct platform_device *pdev) |
8b8b091b TL |
1653 | { |
1654 | struct device_node *np = pdev->dev.of_node; | |
dc7743aa | 1655 | struct pcs_pdata *pdata; |
8b8b091b TL |
1656 | struct resource *res; |
1657 | struct pcs_device *pcs; | |
02e483f6 | 1658 | const struct pcs_soc_data *soc; |
8b8b091b TL |
1659 | int ret; |
1660 | ||
1a8764f4 MY |
1661 | soc = of_device_get_match_data(&pdev->dev); |
1662 | if (WARN_ON(!soc)) | |
8b8b091b TL |
1663 | return -EINVAL; |
1664 | ||
1665 | pcs = devm_kzalloc(&pdev->dev, sizeof(*pcs), GFP_KERNEL); | |
a14aa271 | 1666 | if (!pcs) |
8b8b091b | 1667 | return -ENOMEM; |
a14aa271 | 1668 | |
8b8b091b | 1669 | pcs->dev = &pdev->dev; |
4622215f | 1670 | pcs->np = np; |
3e6cee17 | 1671 | raw_spin_lock_init(&pcs->lock); |
8b8b091b | 1672 | mutex_init(&pcs->mutex); |
a1a277eb | 1673 | INIT_LIST_HEAD(&pcs->gpiofuncs); |
02e483f6 | 1674 | pcs->flags = soc->flags; |
3e6cee17 | 1675 | memcpy(&pcs->socdata, soc, sizeof(*soc)); |
8b8b091b | 1676 | |
cd23604a TL |
1677 | ret = of_property_read_u32(np, "pinctrl-single,register-width", |
1678 | &pcs->width); | |
1679 | if (ret) { | |
1680 | dev_err(pcs->dev, "register width not specified\n"); | |
1681 | ||
1682 | return ret; | |
1683 | } | |
8b8b091b | 1684 | |
477ac771 HZ |
1685 | ret = of_property_read_u32(np, "pinctrl-single,function-mask", |
1686 | &pcs->fmask); | |
1687 | if (!ret) { | |
56b367c0 | 1688 | pcs->fshift = __ffs(pcs->fmask); |
477ac771 HZ |
1689 | pcs->fmax = pcs->fmask >> pcs->fshift; |
1690 | } else { | |
1691 | /* If mask property doesn't exist, function mux is invalid. */ | |
1692 | pcs->fmask = 0; | |
1693 | pcs->fshift = 0; | |
1694 | pcs->fmax = 0; | |
1695 | } | |
8b8b091b TL |
1696 | |
1697 | ret = of_property_read_u32(np, "pinctrl-single,function-off", | |
1698 | &pcs->foff); | |
1699 | if (ret) | |
1700 | pcs->foff = PCS_OFF_DISABLED; | |
1701 | ||
9e605cb6 PU |
1702 | pcs->bits_per_mux = of_property_read_bool(np, |
1703 | "pinctrl-single,bit-per-mux"); | |
4622215f TL |
1704 | ret = pcs_quirk_missing_pinctrl_cells(pcs, np, |
1705 | pcs->bits_per_mux ? 2 : 1); | |
1706 | if (ret) { | |
1707 | dev_err(&pdev->dev, "unable to patch #pinctrl-cells\n"); | |
1708 | ||
1709 | return ret; | |
1710 | } | |
9e605cb6 | 1711 | |
8b8b091b TL |
1712 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1713 | if (!res) { | |
1714 | dev_err(pcs->dev, "could not get resource\n"); | |
1715 | return -ENODEV; | |
1716 | } | |
1717 | ||
1718 | pcs->res = devm_request_mem_region(pcs->dev, res->start, | |
1719 | resource_size(res), DRIVER_NAME); | |
1720 | if (!pcs->res) { | |
1721 | dev_err(pcs->dev, "could not get mem_region\n"); | |
1722 | return -EBUSY; | |
1723 | } | |
1724 | ||
1725 | pcs->size = resource_size(pcs->res); | |
1726 | pcs->base = devm_ioremap(pcs->dev, pcs->res->start, pcs->size); | |
1727 | if (!pcs->base) { | |
1728 | dev_err(pcs->dev, "could not ioremap\n"); | |
1729 | return -ENODEV; | |
1730 | } | |
1731 | ||
8b8b091b TL |
1732 | platform_set_drvdata(pdev, pcs); |
1733 | ||
1734 | switch (pcs->width) { | |
1735 | case 8: | |
1736 | pcs->read = pcs_readb; | |
1737 | pcs->write = pcs_writeb; | |
1738 | break; | |
1739 | case 16: | |
1740 | pcs->read = pcs_readw; | |
1741 | pcs->write = pcs_writew; | |
1742 | break; | |
1743 | case 32: | |
1744 | pcs->read = pcs_readl; | |
1745 | pcs->write = pcs_writel; | |
1746 | break; | |
1747 | default: | |
1748 | break; | |
1749 | } | |
1750 | ||
1751 | pcs->desc.name = DRIVER_NAME; | |
1752 | pcs->desc.pctlops = &pcs_pinctrl_ops; | |
1753 | pcs->desc.pmxops = &pcs_pinmux_ops; | |
02e483f6 | 1754 | if (PCS_HAS_PINCONF) |
a7bbdd7f | 1755 | pcs->desc.confops = &pcs_pinconf_ops; |
8b8b091b TL |
1756 | pcs->desc.owner = THIS_MODULE; |
1757 | ||
1758 | ret = pcs_allocate_pin_table(pcs); | |
1759 | if (ret < 0) | |
1760 | goto free; | |
1761 | ||
950b0d91 TL |
1762 | ret = pinctrl_register_and_init(&pcs->desc, pcs->dev, pcs, &pcs->pctl); |
1763 | if (ret) { | |
8b8b091b | 1764 | dev_err(pcs->dev, "could not register single pinctrl driver\n"); |
8b8b091b TL |
1765 | goto free; |
1766 | } | |
1767 | ||
a1a277eb HZ |
1768 | ret = pcs_add_gpio_func(np, pcs); |
1769 | if (ret < 0) | |
1770 | goto free; | |
1771 | ||
3e6cee17 TL |
1772 | pcs->socdata.irq = irq_of_parse_and_map(np, 0); |
1773 | if (pcs->socdata.irq) | |
1774 | pcs->flags |= PCS_FEAT_IRQ; | |
1775 | ||
dc7743aa TL |
1776 | /* We still need auxdata for some omaps for PRM interrupts */ |
1777 | pdata = dev_get_platdata(&pdev->dev); | |
1778 | if (pdata) { | |
1779 | if (pdata->rearm) | |
1780 | pcs->socdata.rearm = pdata->rearm; | |
1781 | if (pdata->irq) { | |
1782 | pcs->socdata.irq = pdata->irq; | |
1783 | pcs->flags |= PCS_FEAT_IRQ; | |
1784 | } | |
1785 | } | |
1786 | ||
3e6cee17 TL |
1787 | if (PCS_HAS_IRQ) { |
1788 | ret = pcs_irq_init_chained_handler(pcs, np); | |
1789 | if (ret < 0) | |
1790 | dev_warn(pcs->dev, "initialized with no interrupts\n"); | |
1791 | } | |
1792 | ||
c2584927 | 1793 | dev_info(pcs->dev, "%i pins, size %u\n", pcs->desc.npins, pcs->size); |
8b8b091b | 1794 | |
61187142 | 1795 | return pinctrl_enable(pcs->pctl); |
8b8b091b TL |
1796 | |
1797 | free: | |
1798 | pcs_free_resources(pcs); | |
1799 | ||
1800 | return ret; | |
1801 | } | |
1802 | ||
f90f54b3 | 1803 | static int pcs_remove(struct platform_device *pdev) |
8b8b091b TL |
1804 | { |
1805 | struct pcs_device *pcs = platform_get_drvdata(pdev); | |
1806 | ||
1807 | if (!pcs) | |
1808 | return 0; | |
1809 | ||
1810 | pcs_free_resources(pcs); | |
1811 | ||
1812 | return 0; | |
1813 | } | |
1814 | ||
3e6cee17 TL |
1815 | static const struct pcs_soc_data pinctrl_single_omap_wkup = { |
1816 | .flags = PCS_QUIRK_SHARED_IRQ, | |
1817 | .irq_enable_mask = (1 << 14), /* OMAP_WAKEUP_EN */ | |
1818 | .irq_status_mask = (1 << 15), /* OMAP_WAKEUP_EVENT */ | |
1819 | }; | |
1820 | ||
31320bea | 1821 | static const struct pcs_soc_data pinctrl_single_dra7 = { |
31320bea NM |
1822 | .irq_enable_mask = (1 << 24), /* WAKEUPENABLE */ |
1823 | .irq_status_mask = (1 << 25), /* WAKEUPEVENT */ | |
1824 | }; | |
1825 | ||
aa2293d8 K |
1826 | static const struct pcs_soc_data pinctrl_single_am437x = { |
1827 | .flags = PCS_QUIRK_SHARED_IRQ, | |
1828 | .irq_enable_mask = (1 << 29), /* OMAP_WAKEUP_EN */ | |
1829 | .irq_status_mask = (1 << 30), /* OMAP_WAKEUP_EVENT */ | |
1830 | }; | |
1831 | ||
02e483f6 TL |
1832 | static const struct pcs_soc_data pinctrl_single = { |
1833 | }; | |
1834 | ||
1835 | static const struct pcs_soc_data pinconf_single = { | |
1836 | .flags = PCS_FEAT_PINCONF, | |
1837 | }; | |
1838 | ||
baa9946e | 1839 | static const struct of_device_id pcs_of_match[] = { |
3e6cee17 TL |
1840 | { .compatible = "ti,omap3-padconf", .data = &pinctrl_single_omap_wkup }, |
1841 | { .compatible = "ti,omap4-padconf", .data = &pinctrl_single_omap_wkup }, | |
1842 | { .compatible = "ti,omap5-padconf", .data = &pinctrl_single_omap_wkup }, | |
31320bea | 1843 | { .compatible = "ti,dra7-padconf", .data = &pinctrl_single_dra7 }, |
aa2293d8 | 1844 | { .compatible = "ti,am437-padconf", .data = &pinctrl_single_am437x }, |
02e483f6 TL |
1845 | { .compatible = "pinctrl-single", .data = &pinctrl_single }, |
1846 | { .compatible = "pinconf-single", .data = &pinconf_single }, | |
8b8b091b TL |
1847 | { }, |
1848 | }; | |
1849 | MODULE_DEVICE_TABLE(of, pcs_of_match); | |
1850 | ||
1851 | static struct platform_driver pcs_driver = { | |
1852 | .probe = pcs_probe, | |
2a36f086 | 1853 | .remove = pcs_remove, |
8b8b091b | 1854 | .driver = { |
8b8b091b TL |
1855 | .name = DRIVER_NAME, |
1856 | .of_match_table = pcs_of_match, | |
1857 | }, | |
0f9bc4bc HG |
1858 | #ifdef CONFIG_PM |
1859 | .suspend = pinctrl_single_suspend, | |
1860 | .resume = pinctrl_single_resume, | |
1861 | #endif | |
8b8b091b TL |
1862 | }; |
1863 | ||
1864 | module_platform_driver(pcs_driver); | |
1865 | ||
1866 | MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); | |
1867 | MODULE_DESCRIPTION("One-register-per-pin type device tree based pinctrl driver"); | |
1868 | MODULE_LICENSE("GPL v2"); |