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> | |
060f03e9 | 15 | #include <linux/platform_device.h> |
8b8b091b TL |
16 | #include <linux/slab.h> |
17 | #include <linux/err.h> | |
18 | #include <linux/list.h> | |
3e6cee17 | 19 | #include <linux/interrupt.h> |
3e6cee17 | 20 | #include <linux/irqchip/chained_irq.h> |
8b8b091b | 21 | #include <linux/of.h> |
3e6cee17 | 22 | #include <linux/of_irq.h> |
486e0d87 | 23 | #include <linux/seq_file.h> |
8b8b091b | 24 | |
486e0d87 AS |
25 | #include <linux/pinctrl/pinconf-generic.h> |
26 | #include <linux/pinctrl/pinconf.h> | |
8b8b091b TL |
27 | #include <linux/pinctrl/pinctrl.h> |
28 | #include <linux/pinctrl/pinmux.h> | |
29 | ||
dc7743aa TL |
30 | #include <linux/platform_data/pinctrl-single.h> |
31 | ||
8b8b091b | 32 | #include "core.h" |
4622215f | 33 | #include "devicetree.h" |
9dddb4df | 34 | #include "pinconf.h" |
571aec4d | 35 | #include "pinmux.h" |
8b8b091b TL |
36 | |
37 | #define DRIVER_NAME "pinctrl-single" | |
8b8b091b TL |
38 | #define PCS_OFF_DISABLED ~0U |
39 | ||
8b8b091b TL |
40 | /** |
41 | * struct pcs_func_vals - mux function register offset and value pair | |
42 | * @reg: register virtual address | |
43 | * @val: register value | |
0ba5ab00 | 44 | * @mask: mask |
8b8b091b TL |
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 | |
0ba5ab00 LJ |
86 | * @conf: array of pin configurations |
87 | * @nconfs: number of pin configurations available | |
8b8b091b TL |
88 | * @node: list node |
89 | */ | |
90 | struct pcs_function { | |
91 | const char *name; | |
92 | struct pcs_func_vals *vals; | |
93 | unsigned nvals; | |
94 | const char **pgnames; | |
95 | int npgnames; | |
9dddb4df HZ |
96 | struct pcs_conf_vals *conf; |
97 | int nconfs; | |
8b8b091b TL |
98 | struct list_head node; |
99 | }; | |
100 | ||
a1a277eb HZ |
101 | /** |
102 | * struct pcs_gpiofunc_range - pin ranges with same mux value of gpio function | |
103 | * @offset: offset base of pins | |
104 | * @npins: number pins with the same mux value of gpio function | |
105 | * @gpiofunc: mux value of gpio function | |
106 | * @node: list node | |
107 | */ | |
108 | struct pcs_gpiofunc_range { | |
109 | unsigned offset; | |
110 | unsigned npins; | |
111 | unsigned gpiofunc; | |
112 | struct list_head node; | |
113 | }; | |
114 | ||
8b8b091b TL |
115 | /** |
116 | * struct pcs_data - wrapper for data needed by pinctrl framework | |
117 | * @pa: pindesc array | |
118 | * @cur: index to current element | |
119 | * | |
120 | * REVISIT: We should be able to drop this eventually by adding | |
121 | * support for registering pins individually in the pinctrl | |
122 | * framework for those drivers that don't need a static array. | |
123 | */ | |
124 | struct pcs_data { | |
125 | struct pinctrl_pin_desc *pa; | |
126 | int cur; | |
127 | }; | |
128 | ||
02e483f6 TL |
129 | /** |
130 | * struct pcs_soc_data - SoC specific settings | |
131 | * @flags: initial SoC specific PCS_FEAT_xxx values | |
3e6cee17 TL |
132 | * @irq: optional interrupt for the controller |
133 | * @irq_enable_mask: optional SoC specific interrupt enable mask | |
134 | * @irq_status_mask: optional SoC specific interrupt status mask | |
dc7743aa | 135 | * @rearm: optional SoC specific wake-up rearm function |
02e483f6 TL |
136 | */ |
137 | struct pcs_soc_data { | |
138 | unsigned flags; | |
3e6cee17 TL |
139 | int irq; |
140 | unsigned irq_enable_mask; | |
141 | unsigned irq_status_mask; | |
dc7743aa | 142 | void (*rearm)(void); |
02e483f6 TL |
143 | }; |
144 | ||
8b8b091b TL |
145 | /** |
146 | * struct pcs_device - pinctrl device instance | |
147 | * @res: resources | |
148 | * @base: virtual address of the controller | |
88a1dbde | 149 | * @saved_vals: saved values for the controller |
8b8b091b TL |
150 | * @size: size of the ioremapped area |
151 | * @dev: device entry | |
4622215f | 152 | * @np: device tree node |
8b8b091b | 153 | * @pctl: pin controller device |
02e483f6 | 154 | * @flags: mask of PCS_FEAT_xxx values |
4622215f TL |
155 | * @missing_nr_pinctrl_cells: for legacy binding, may go away |
156 | * @socdata: soc specific data | |
3e6cee17 | 157 | * @lock: spinlock for register access |
8b8b091b TL |
158 | * @mutex: mutex protecting the lists |
159 | * @width: bits per mux register | |
160 | * @fmask: function register mask | |
161 | * @fshift: function register shift | |
162 | * @foff: value to turn mux off | |
163 | * @fmax: max number of functions in fmask | |
4622215f TL |
164 | * @bits_per_mux: number of bits per mux |
165 | * @bits_per_pin: number of bits per pin | |
8b8b091b | 166 | * @pins: physical pins on the SoC |
a1a277eb | 167 | * @gpiofuncs: list of gpio functions |
3e6cee17 TL |
168 | * @irqs: list of interrupt registers |
169 | * @chip: chip container for this instance | |
170 | * @domain: IRQ domain for this instance | |
8b8b091b TL |
171 | * @desc: pin controller descriptor |
172 | * @read: register read function to use | |
173 | * @write: register write function to use | |
174 | */ | |
175 | struct pcs_device { | |
176 | struct resource *res; | |
177 | void __iomem *base; | |
88a1dbde | 178 | void *saved_vals; |
8b8b091b TL |
179 | unsigned size; |
180 | struct device *dev; | |
4622215f | 181 | struct device_node *np; |
8b8b091b | 182 | struct pinctrl_dev *pctl; |
02e483f6 | 183 | unsigned flags; |
88a1dbde | 184 | #define PCS_CONTEXT_LOSS_OFF (1 << 3) |
3e6cee17 TL |
185 | #define PCS_QUIRK_SHARED_IRQ (1 << 2) |
186 | #define PCS_FEAT_IRQ (1 << 1) | |
02e483f6 | 187 | #define PCS_FEAT_PINCONF (1 << 0) |
4622215f | 188 | struct property *missing_nr_pinctrl_cells; |
3e6cee17 TL |
189 | struct pcs_soc_data socdata; |
190 | raw_spinlock_t lock; | |
8b8b091b TL |
191 | struct mutex mutex; |
192 | unsigned width; | |
193 | unsigned fmask; | |
194 | unsigned fshift; | |
195 | unsigned foff; | |
196 | unsigned fmax; | |
9e605cb6 | 197 | bool bits_per_mux; |
4e7e8017 | 198 | unsigned bits_per_pin; |
8b8b091b | 199 | struct pcs_data pins; |
a1a277eb | 200 | struct list_head gpiofuncs; |
3e6cee17 TL |
201 | struct list_head irqs; |
202 | struct irq_chip chip; | |
203 | struct irq_domain *domain; | |
8b8b091b TL |
204 | struct pinctrl_desc desc; |
205 | unsigned (*read)(void __iomem *reg); | |
206 | void (*write)(unsigned val, void __iomem *reg); | |
207 | }; | |
208 | ||
3e6cee17 TL |
209 | #define PCS_QUIRK_HAS_SHARED_IRQ (pcs->flags & PCS_QUIRK_SHARED_IRQ) |
210 | #define PCS_HAS_IRQ (pcs->flags & PCS_FEAT_IRQ) | |
02e483f6 TL |
211 | #define PCS_HAS_PINCONF (pcs->flags & PCS_FEAT_PINCONF) |
212 | ||
9dddb4df HZ |
213 | static int pcs_pinconf_get(struct pinctrl_dev *pctldev, unsigned pin, |
214 | unsigned long *config); | |
215 | static int pcs_pinconf_set(struct pinctrl_dev *pctldev, unsigned pin, | |
03b054e9 | 216 | unsigned long *configs, unsigned num_configs); |
9dddb4df HZ |
217 | |
218 | static enum pin_config_param pcs_bias[] = { | |
219 | PIN_CONFIG_BIAS_PULL_DOWN, | |
220 | PIN_CONFIG_BIAS_PULL_UP, | |
221 | }; | |
222 | ||
3c177a16 SH |
223 | /* |
224 | * This lock class tells lockdep that irqchip core that this single | |
225 | * pinctrl can be in a different category than its parents, so it won't | |
226 | * report false recursion. | |
227 | */ | |
228 | static struct lock_class_key pcs_lock_class; | |
229 | ||
39c3fd58 AL |
230 | /* Class for the IRQ request mutex */ |
231 | static struct lock_class_key pcs_request_class; | |
232 | ||
8b8b091b TL |
233 | /* |
234 | * REVISIT: Reads and writes could eventually use regmap or something | |
235 | * generic. But at least on omaps, some mux registers are performance | |
236 | * critical as they may need to be remuxed every time before and after | |
237 | * idle. Adding tests for register access width for every read and | |
238 | * write like regmap is doing is not desired, and caching the registers | |
239 | * does not help in this case. | |
240 | */ | |
241 | ||
242 | static unsigned __maybe_unused pcs_readb(void __iomem *reg) | |
243 | { | |
244 | return readb(reg); | |
245 | } | |
246 | ||
247 | static unsigned __maybe_unused pcs_readw(void __iomem *reg) | |
248 | { | |
249 | return readw(reg); | |
250 | } | |
251 | ||
252 | static unsigned __maybe_unused pcs_readl(void __iomem *reg) | |
253 | { | |
254 | return readl(reg); | |
255 | } | |
256 | ||
257 | static void __maybe_unused pcs_writeb(unsigned val, void __iomem *reg) | |
258 | { | |
259 | writeb(val, reg); | |
260 | } | |
261 | ||
262 | static void __maybe_unused pcs_writew(unsigned val, void __iomem *reg) | |
263 | { | |
264 | writew(val, reg); | |
265 | } | |
266 | ||
267 | static void __maybe_unused pcs_writel(unsigned val, void __iomem *reg) | |
268 | { | |
269 | writel(val, reg); | |
270 | } | |
271 | ||
bd85125e HH |
272 | static unsigned int pcs_pin_reg_offset_get(struct pcs_device *pcs, |
273 | unsigned int pin) | |
274 | { | |
275 | unsigned int mux_bytes = pcs->width / BITS_PER_BYTE; | |
276 | ||
277 | if (pcs->bits_per_mux) { | |
278 | unsigned int pin_offset_bytes; | |
279 | ||
280 | pin_offset_bytes = (pcs->bits_per_pin * pin) / BITS_PER_BYTE; | |
281 | return (pin_offset_bytes / mux_bytes) * mux_bytes; | |
282 | } | |
283 | ||
284 | return pin * mux_bytes; | |
285 | } | |
286 | ||
287 | static unsigned int pcs_pin_shift_reg_get(struct pcs_device *pcs, | |
288 | unsigned int pin) | |
289 | { | |
290 | return (pin % (pcs->width / pcs->bits_per_pin)) * pcs->bits_per_pin; | |
291 | } | |
292 | ||
8b8b091b TL |
293 | static void pcs_pin_dbg_show(struct pinctrl_dev *pctldev, |
294 | struct seq_file *s, | |
e7ed6718 | 295 | unsigned pin) |
8b8b091b | 296 | { |
7d66ce7f | 297 | struct pcs_device *pcs; |
bd85125e | 298 | unsigned int val; |
223decc4 TL |
299 | unsigned long offset; |
300 | size_t pa; | |
7d66ce7f MP |
301 | |
302 | pcs = pinctrl_dev_get_drvdata(pctldev); | |
303 | ||
bd85125e | 304 | offset = pcs_pin_reg_offset_get(pcs, pin); |
223decc4 | 305 | val = pcs->read(pcs->base + offset); |
bd85125e HH |
306 | |
307 | if (pcs->bits_per_mux) | |
308 | val &= pcs->fmask << pcs_pin_shift_reg_get(pcs, pin); | |
309 | ||
223decc4 | 310 | pa = pcs->res->start + offset; |
7d66ce7f | 311 | |
223decc4 | 312 | seq_printf(s, "%zx %08x %s ", pa, val, DRIVER_NAME); |
8b8b091b TL |
313 | } |
314 | ||
315 | static void pcs_dt_free_map(struct pinctrl_dev *pctldev, | |
316 | struct pinctrl_map *map, unsigned num_maps) | |
317 | { | |
318 | struct pcs_device *pcs; | |
319 | ||
320 | pcs = pinctrl_dev_get_drvdata(pctldev); | |
321 | devm_kfree(pcs->dev, map); | |
322 | } | |
323 | ||
324 | static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev, | |
325 | struct device_node *np_config, | |
326 | struct pinctrl_map **map, unsigned *num_maps); | |
327 | ||
022ab148 | 328 | static const struct pinctrl_ops pcs_pinctrl_ops = { |
caeb774e TL |
329 | .get_groups_count = pinctrl_generic_get_group_count, |
330 | .get_group_name = pinctrl_generic_get_group_name, | |
331 | .get_group_pins = pinctrl_generic_get_group_pins, | |
8b8b091b TL |
332 | .pin_dbg_show = pcs_pin_dbg_show, |
333 | .dt_node_to_map = pcs_dt_node_to_map, | |
334 | .dt_free_map = pcs_dt_free_map, | |
335 | }; | |
336 | ||
9dddb4df HZ |
337 | static int pcs_get_function(struct pinctrl_dev *pctldev, unsigned pin, |
338 | struct pcs_function **func) | |
339 | { | |
340 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); | |
341 | struct pin_desc *pdesc = pin_desc_get(pctldev, pin); | |
342 | const struct pinctrl_setting_mux *setting; | |
571aec4d | 343 | struct function_desc *function; |
9dddb4df HZ |
344 | unsigned fselector; |
345 | ||
346 | /* If pin is not described in DTS & enabled, mux_setting is NULL. */ | |
347 | setting = pdesc->mux_setting; | |
348 | if (!setting) | |
349 | return -ENOTSUPP; | |
350 | fselector = setting->func; | |
571aec4d TL |
351 | function = pinmux_generic_get_function(pctldev, fselector); |
352 | *func = function->data; | |
9dddb4df HZ |
353 | if (!(*func)) { |
354 | dev_err(pcs->dev, "%s could not find function%i\n", | |
355 | __func__, fselector); | |
356 | return -ENOTSUPP; | |
357 | } | |
358 | return 0; | |
359 | } | |
360 | ||
03e9f0ca | 361 | static int pcs_set_mux(struct pinctrl_dev *pctldev, unsigned fselector, |
8b8b091b TL |
362 | unsigned group) |
363 | { | |
364 | struct pcs_device *pcs; | |
571aec4d | 365 | struct function_desc *function; |
8b8b091b TL |
366 | struct pcs_function *func; |
367 | int i; | |
368 | ||
369 | pcs = pinctrl_dev_get_drvdata(pctldev); | |
477ac771 HZ |
370 | /* If function mask is null, needn't enable it. */ |
371 | if (!pcs->fmask) | |
372 | return 0; | |
571aec4d | 373 | function = pinmux_generic_get_function(pctldev, fselector); |
d2d73e6d MK |
374 | if (!function) |
375 | return -EINVAL; | |
571aec4d | 376 | func = function->data; |
8b8b091b TL |
377 | if (!func) |
378 | return -EINVAL; | |
379 | ||
380 | dev_dbg(pcs->dev, "enabling %s function%i\n", | |
381 | func->name, fselector); | |
382 | ||
383 | for (i = 0; i < func->nvals; i++) { | |
384 | struct pcs_func_vals *vals; | |
3e6cee17 | 385 | unsigned long flags; |
9e605cb6 | 386 | unsigned val, mask; |
8b8b091b TL |
387 | |
388 | vals = &func->vals[i]; | |
3e6cee17 | 389 | raw_spin_lock_irqsave(&pcs->lock, flags); |
8b8b091b | 390 | val = pcs->read(vals->reg); |
4e7e8017 MP |
391 | |
392 | if (pcs->bits_per_mux) | |
393 | mask = vals->mask; | |
9e605cb6 | 394 | else |
4e7e8017 | 395 | mask = pcs->fmask; |
9e605cb6 PU |
396 | |
397 | val &= ~mask; | |
398 | val |= (vals->val & mask); | |
8b8b091b | 399 | pcs->write(val, vals->reg); |
3e6cee17 | 400 | raw_spin_unlock_irqrestore(&pcs->lock, flags); |
8b8b091b TL |
401 | } |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
8b8b091b | 406 | static int pcs_request_gpio(struct pinctrl_dev *pctldev, |
a1a277eb | 407 | struct pinctrl_gpio_range *range, unsigned pin) |
8b8b091b | 408 | { |
a1a277eb HZ |
409 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
410 | struct pcs_gpiofunc_range *frange = NULL; | |
411 | struct list_head *pos, *tmp; | |
a1a277eb HZ |
412 | unsigned data; |
413 | ||
477ac771 HZ |
414 | /* If function mask is null, return directly. */ |
415 | if (!pcs->fmask) | |
416 | return -ENOTSUPP; | |
417 | ||
a1a277eb | 418 | list_for_each_safe(pos, tmp, &pcs->gpiofuncs) { |
bd85125e HH |
419 | u32 offset; |
420 | ||
a1a277eb HZ |
421 | frange = list_entry(pos, struct pcs_gpiofunc_range, node); |
422 | if (pin >= frange->offset + frange->npins | |
423 | || pin < frange->offset) | |
424 | continue; | |
45dcb54f | 425 | |
bd85125e | 426 | offset = pcs_pin_reg_offset_get(pcs, pin); |
45dcb54f | 427 | |
bd85125e HH |
428 | if (pcs->bits_per_mux) { |
429 | int pin_shift = pcs_pin_shift_reg_get(pcs, pin); | |
45dcb54f DL |
430 | |
431 | data = pcs->read(pcs->base + offset); | |
432 | data &= ~(pcs->fmask << pin_shift); | |
433 | data |= frange->gpiofunc << pin_shift; | |
434 | pcs->write(data, pcs->base + offset); | |
435 | } else { | |
bd85125e | 436 | data = pcs->read(pcs->base + offset); |
45dcb54f DL |
437 | data &= ~pcs->fmask; |
438 | data |= frange->gpiofunc; | |
bd85125e | 439 | pcs->write(data, pcs->base + offset); |
45dcb54f | 440 | } |
a1a277eb HZ |
441 | break; |
442 | } | |
443 | return 0; | |
8b8b091b TL |
444 | } |
445 | ||
022ab148 | 446 | static const struct pinmux_ops pcs_pinmux_ops = { |
571aec4d TL |
447 | .get_functions_count = pinmux_generic_get_function_count, |
448 | .get_function_name = pinmux_generic_get_function_name, | |
449 | .get_function_groups = pinmux_generic_get_function_groups, | |
9e3a979f | 450 | .set_mux = pcs_set_mux, |
8b8b091b TL |
451 | .gpio_request_enable = pcs_request_gpio, |
452 | }; | |
453 | ||
9dddb4df HZ |
454 | /* Clear BIAS value */ |
455 | static void pcs_pinconf_clear_bias(struct pinctrl_dev *pctldev, unsigned pin) | |
456 | { | |
457 | unsigned long config; | |
458 | int i; | |
459 | for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) { | |
460 | config = pinconf_to_config_packed(pcs_bias[i], 0); | |
03b054e9 | 461 | pcs_pinconf_set(pctldev, pin, &config, 1); |
9dddb4df HZ |
462 | } |
463 | } | |
464 | ||
465 | /* | |
466 | * Check whether PIN_CONFIG_BIAS_DISABLE is valid. | |
467 | * It's depend on that PULL_DOWN & PULL_UP configs are all invalid. | |
468 | */ | |
469 | static bool pcs_pinconf_bias_disable(struct pinctrl_dev *pctldev, unsigned pin) | |
470 | { | |
471 | unsigned long config; | |
472 | int i; | |
473 | ||
474 | for (i = 0; i < ARRAY_SIZE(pcs_bias); i++) { | |
475 | config = pinconf_to_config_packed(pcs_bias[i], 0); | |
476 | if (!pcs_pinconf_get(pctldev, pin, &config)) | |
477 | goto out; | |
478 | } | |
479 | return true; | |
480 | out: | |
481 | return false; | |
482 | } | |
483 | ||
8b8b091b TL |
484 | static int pcs_pinconf_get(struct pinctrl_dev *pctldev, |
485 | unsigned pin, unsigned long *config) | |
486 | { | |
9dddb4df HZ |
487 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
488 | struct pcs_function *func; | |
489 | enum pin_config_param param; | |
490 | unsigned offset = 0, data = 0, i, j, ret; | |
491 | ||
492 | ret = pcs_get_function(pctldev, pin, &func); | |
493 | if (ret) | |
494 | return ret; | |
495 | ||
496 | for (i = 0; i < func->nconfs; i++) { | |
497 | param = pinconf_to_config_param(*config); | |
498 | if (param == PIN_CONFIG_BIAS_DISABLE) { | |
499 | if (pcs_pinconf_bias_disable(pctldev, pin)) { | |
500 | *config = 0; | |
501 | return 0; | |
502 | } else { | |
503 | return -ENOTSUPP; | |
504 | } | |
505 | } else if (param != func->conf[i].param) { | |
506 | continue; | |
507 | } | |
508 | ||
509 | offset = pin * (pcs->width / BITS_PER_BYTE); | |
510 | data = pcs->read(pcs->base + offset) & func->conf[i].mask; | |
511 | switch (func->conf[i].param) { | |
512 | /* 4 parameters */ | |
513 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
514 | case PIN_CONFIG_BIAS_PULL_UP: | |
515 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: | |
516 | if ((data != func->conf[i].enable) || | |
517 | (data == func->conf[i].disable)) | |
518 | return -ENOTSUPP; | |
519 | *config = 0; | |
520 | break; | |
521 | /* 2 parameters */ | |
522 | case PIN_CONFIG_INPUT_SCHMITT: | |
523 | for (j = 0; j < func->nconfs; j++) { | |
524 | switch (func->conf[j].param) { | |
525 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: | |
526 | if (data != func->conf[j].enable) | |
527 | return -ENOTSUPP; | |
528 | break; | |
529 | default: | |
530 | break; | |
531 | } | |
532 | } | |
533 | *config = data; | |
534 | break; | |
535 | case PIN_CONFIG_DRIVE_STRENGTH: | |
536 | case PIN_CONFIG_SLEW_RATE: | |
31f9a421 | 537 | case PIN_CONFIG_MODE_LOW_POWER: |
8c987eb1 | 538 | case PIN_CONFIG_INPUT_ENABLE: |
9dddb4df HZ |
539 | default: |
540 | *config = data; | |
541 | break; | |
542 | } | |
543 | return 0; | |
544 | } | |
8b8b091b TL |
545 | return -ENOTSUPP; |
546 | } | |
547 | ||
548 | static int pcs_pinconf_set(struct pinctrl_dev *pctldev, | |
03b054e9 SY |
549 | unsigned pin, unsigned long *configs, |
550 | unsigned num_configs) | |
8b8b091b | 551 | { |
9dddb4df HZ |
552 | struct pcs_device *pcs = pinctrl_dev_get_drvdata(pctldev); |
553 | struct pcs_function *func; | |
7cba5b3f | 554 | unsigned offset = 0, shift = 0, i, data, ret; |
58957d2e | 555 | u32 arg; |
03b054e9 | 556 | int j; |
9dddb4df HZ |
557 | |
558 | ret = pcs_get_function(pctldev, pin, &func); | |
559 | if (ret) | |
560 | return ret; | |
561 | ||
03b054e9 SY |
562 | for (j = 0; j < num_configs; j++) { |
563 | for (i = 0; i < func->nconfs; i++) { | |
564 | if (pinconf_to_config_param(configs[j]) | |
565 | != func->conf[i].param) | |
566 | continue; | |
567 | ||
9dddb4df HZ |
568 | offset = pin * (pcs->width / BITS_PER_BYTE); |
569 | data = pcs->read(pcs->base + offset); | |
03b054e9 | 570 | arg = pinconf_to_config_argument(configs[j]); |
9dddb4df HZ |
571 | switch (func->conf[i].param) { |
572 | /* 2 parameters */ | |
573 | case PIN_CONFIG_INPUT_SCHMITT: | |
574 | case PIN_CONFIG_DRIVE_STRENGTH: | |
575 | case PIN_CONFIG_SLEW_RATE: | |
31f9a421 | 576 | case PIN_CONFIG_MODE_LOW_POWER: |
8c987eb1 | 577 | case PIN_CONFIG_INPUT_ENABLE: |
9dddb4df | 578 | shift = ffs(func->conf[i].mask) - 1; |
9dddb4df HZ |
579 | data &= ~func->conf[i].mask; |
580 | data |= (arg << shift) & func->conf[i].mask; | |
581 | break; | |
582 | /* 4 parameters */ | |
583 | case PIN_CONFIG_BIAS_DISABLE: | |
584 | pcs_pinconf_clear_bias(pctldev, pin); | |
585 | break; | |
586 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
587 | case PIN_CONFIG_BIAS_PULL_UP: | |
7cba5b3f | 588 | if (arg) |
9dddb4df | 589 | pcs_pinconf_clear_bias(pctldev, pin); |
c4429556 | 590 | fallthrough; |
9dddb4df HZ |
591 | case PIN_CONFIG_INPUT_SCHMITT_ENABLE: |
592 | data &= ~func->conf[i].mask; | |
7cba5b3f | 593 | if (arg) |
9dddb4df HZ |
594 | data |= func->conf[i].enable; |
595 | else | |
596 | data |= func->conf[i].disable; | |
597 | break; | |
598 | default: | |
599 | return -ENOTSUPP; | |
600 | } | |
601 | pcs->write(data, pcs->base + offset); | |
03b054e9 SY |
602 | |
603 | break; | |
9dddb4df | 604 | } |
03b054e9 SY |
605 | if (i >= func->nconfs) |
606 | return -ENOTSUPP; | |
607 | } /* for each config */ | |
608 | ||
609 | return 0; | |
8b8b091b TL |
610 | } |
611 | ||
612 | static int pcs_pinconf_group_get(struct pinctrl_dev *pctldev, | |
613 | unsigned group, unsigned long *config) | |
614 | { | |
9dddb4df HZ |
615 | const unsigned *pins; |
616 | unsigned npins, old = 0; | |
617 | int i, ret; | |
618 | ||
caeb774e | 619 | ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins); |
9dddb4df HZ |
620 | if (ret) |
621 | return ret; | |
622 | for (i = 0; i < npins; i++) { | |
623 | if (pcs_pinconf_get(pctldev, pins[i], config)) | |
624 | return -ENOTSUPP; | |
625 | /* configs do not match between two pins */ | |
626 | if (i && (old != *config)) | |
627 | return -ENOTSUPP; | |
628 | old = *config; | |
629 | } | |
630 | return 0; | |
8b8b091b TL |
631 | } |
632 | ||
633 | static int pcs_pinconf_group_set(struct pinctrl_dev *pctldev, | |
03b054e9 SY |
634 | unsigned group, unsigned long *configs, |
635 | unsigned num_configs) | |
8b8b091b | 636 | { |
9dddb4df HZ |
637 | const unsigned *pins; |
638 | unsigned npins; | |
639 | int i, ret; | |
640 | ||
caeb774e | 641 | ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins); |
9dddb4df HZ |
642 | if (ret) |
643 | return ret; | |
644 | for (i = 0; i < npins; i++) { | |
03b054e9 | 645 | if (pcs_pinconf_set(pctldev, pins[i], configs, num_configs)) |
9dddb4df HZ |
646 | return -ENOTSUPP; |
647 | } | |
648 | return 0; | |
8b8b091b TL |
649 | } |
650 | ||
651 | static void pcs_pinconf_dbg_show(struct pinctrl_dev *pctldev, | |
9dddb4df | 652 | struct seq_file *s, unsigned pin) |
8b8b091b TL |
653 | { |
654 | } | |
655 | ||
656 | static void pcs_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, | |
657 | struct seq_file *s, unsigned selector) | |
658 | { | |
659 | } | |
660 | ||
9dddb4df HZ |
661 | static void pcs_pinconf_config_dbg_show(struct pinctrl_dev *pctldev, |
662 | struct seq_file *s, | |
663 | unsigned long config) | |
664 | { | |
665 | pinconf_generic_dump_config(pctldev, s, config); | |
666 | } | |
667 | ||
022ab148 | 668 | static const struct pinconf_ops pcs_pinconf_ops = { |
8b8b091b TL |
669 | .pin_config_get = pcs_pinconf_get, |
670 | .pin_config_set = pcs_pinconf_set, | |
671 | .pin_config_group_get = pcs_pinconf_group_get, | |
672 | .pin_config_group_set = pcs_pinconf_group_set, | |
673 | .pin_config_dbg_show = pcs_pinconf_dbg_show, | |
674 | .pin_config_group_dbg_show = pcs_pinconf_group_dbg_show, | |
9dddb4df | 675 | .pin_config_config_dbg_show = pcs_pinconf_config_dbg_show, |
a7bbdd7f | 676 | .is_generic = true, |
8b8b091b TL |
677 | }; |
678 | ||
679 | /** | |
680 | * pcs_add_pin() - add a pin to the static per controller pin array | |
681 | * @pcs: pcs driver instance | |
682 | * @offset: register offset from base | |
683 | */ | |
8fa2ea20 | 684 | static int pcs_add_pin(struct pcs_device *pcs, unsigned int offset) |
8b8b091b | 685 | { |
58968625 | 686 | struct pcs_soc_data *pcs_soc = &pcs->socdata; |
8b8b091b | 687 | struct pinctrl_pin_desc *pin; |
8b8b091b TL |
688 | int i; |
689 | ||
690 | i = pcs->pins.cur; | |
691 | if (i >= pcs->desc.npins) { | |
692 | dev_err(pcs->dev, "too many pins, max %i\n", | |
693 | pcs->desc.npins); | |
694 | return -ENOMEM; | |
695 | } | |
696 | ||
58968625 TL |
697 | if (pcs_soc->irq_enable_mask) { |
698 | unsigned val; | |
699 | ||
700 | val = pcs->read(pcs->base + offset); | |
701 | if (val & pcs_soc->irq_enable_mask) { | |
702 | dev_dbg(pcs->dev, "irq enabled at boot for pin at %lx (%x), clearing\n", | |
703 | (unsigned long)pcs->res->start + offset, val); | |
704 | val &= ~pcs_soc->irq_enable_mask; | |
705 | pcs->write(val, pcs->base + offset); | |
706 | } | |
707 | } | |
708 | ||
8b8b091b | 709 | pin = &pcs->pins.pa[i]; |
8b8b091b TL |
710 | pin->number = i; |
711 | pcs->pins.cur++; | |
712 | ||
713 | return i; | |
714 | } | |
715 | ||
716 | /** | |
717 | * pcs_allocate_pin_table() - adds all the pins for the pinctrl driver | |
718 | * @pcs: pcs driver instance | |
719 | * | |
720 | * In case of errors, resources are freed in pcs_free_resources. | |
721 | * | |
722 | * If your hardware needs holes in the address space, then just set | |
723 | * up multiple driver instances. | |
724 | */ | |
150632b0 | 725 | static int pcs_allocate_pin_table(struct pcs_device *pcs) |
8b8b091b TL |
726 | { |
727 | int mux_bytes, nr_pins, i; | |
728 | ||
729 | mux_bytes = pcs->width / BITS_PER_BYTE; | |
4e7e8017 | 730 | |
64c15033 | 731 | if (pcs->bits_per_mux && pcs->fmask) { |
4e7e8017 MP |
732 | pcs->bits_per_pin = fls(pcs->fmask); |
733 | nr_pins = (pcs->size * BITS_PER_BYTE) / pcs->bits_per_pin; | |
734 | } else { | |
735 | nr_pins = pcs->size / mux_bytes; | |
736 | } | |
8b8b091b TL |
737 | |
738 | dev_dbg(pcs->dev, "allocating %i pins\n", nr_pins); | |
a86854d0 KC |
739 | pcs->pins.pa = devm_kcalloc(pcs->dev, |
740 | nr_pins, sizeof(*pcs->pins.pa), | |
8b8b091b TL |
741 | GFP_KERNEL); |
742 | if (!pcs->pins.pa) | |
743 | return -ENOMEM; | |
744 | ||
8b8b091b TL |
745 | pcs->desc.pins = pcs->pins.pa; |
746 | pcs->desc.npins = nr_pins; | |
747 | ||
748 | for (i = 0; i < pcs->desc.npins; i++) { | |
749 | unsigned offset; | |
750 | int res; | |
751 | ||
bd85125e | 752 | offset = pcs_pin_reg_offset_get(pcs, i); |
8fa2ea20 | 753 | res = pcs_add_pin(pcs, offset); |
8b8b091b TL |
754 | if (res < 0) { |
755 | dev_err(pcs->dev, "error adding pins: %i\n", res); | |
756 | return res; | |
757 | } | |
758 | } | |
759 | ||
760 | return 0; | |
761 | } | |
762 | ||
763 | /** | |
764 | * pcs_add_function() - adds a new function to the function list | |
765 | * @pcs: pcs driver instance | |
a4ab1086 | 766 | * @fcn: new function allocated |
8b8b091b TL |
767 | * @name: name of the function |
768 | * @vals: array of mux register value pairs used by the function | |
769 | * @nvals: number of mux register value pairs | |
770 | * @pgnames: array of pingroup names for the function | |
771 | * @npgnames: number of pingroup names | |
a4ab1086 TL |
772 | * |
773 | * Caller must take care of locking. | |
8b8b091b | 774 | */ |
a4ab1086 TL |
775 | static int pcs_add_function(struct pcs_device *pcs, |
776 | struct pcs_function **fcn, | |
777 | const char *name, | |
778 | struct pcs_func_vals *vals, | |
779 | unsigned int nvals, | |
780 | const char **pgnames, | |
781 | unsigned int npgnames) | |
8b8b091b TL |
782 | { |
783 | struct pcs_function *function; | |
a4ab1086 | 784 | int selector; |
8b8b091b TL |
785 | |
786 | function = devm_kzalloc(pcs->dev, sizeof(*function), GFP_KERNEL); | |
787 | if (!function) | |
a4ab1086 | 788 | return -ENOMEM; |
8b8b091b | 789 | |
8b8b091b TL |
790 | function->vals = vals; |
791 | function->nvals = nvals; | |
4739b1b1 | 792 | function->name = name; |
8b8b091b | 793 | |
a4ab1086 TL |
794 | selector = pinmux_generic_add_function(pcs->pctl, name, |
795 | pgnames, npgnames, | |
796 | function); | |
797 | if (selector < 0) { | |
798 | devm_kfree(pcs->dev, function); | |
799 | *fcn = NULL; | |
800 | } else { | |
801 | *fcn = function; | |
802 | } | |
8b8b091b | 803 | |
a4ab1086 | 804 | return selector; |
8b8b091b TL |
805 | } |
806 | ||
8b8b091b TL |
807 | /** |
808 | * pcs_get_pin_by_offset() - get a pin index based on the register offset | |
809 | * @pcs: pcs driver instance | |
810 | * @offset: register offset from the base | |
811 | * | |
812 | * Note that this is OK as long as the pins are in a static array. | |
813 | */ | |
814 | static int pcs_get_pin_by_offset(struct pcs_device *pcs, unsigned offset) | |
815 | { | |
816 | unsigned index; | |
817 | ||
818 | if (offset >= pcs->size) { | |
819 | dev_err(pcs->dev, "mux offset out of range: 0x%x (0x%x)\n", | |
820 | offset, pcs->size); | |
821 | return -EINVAL; | |
822 | } | |
823 | ||
4e7e8017 MP |
824 | if (pcs->bits_per_mux) |
825 | index = (offset * BITS_PER_BYTE) / pcs->bits_per_pin; | |
826 | else | |
827 | index = offset / (pcs->width / BITS_PER_BYTE); | |
8b8b091b TL |
828 | |
829 | return index; | |
830 | } | |
831 | ||
9dddb4df HZ |
832 | /* |
833 | * check whether data matches enable bits or disable bits | |
834 | * Return value: 1 for matching enable bits, 0 for matching disable bits, | |
835 | * and negative value for matching failure. | |
836 | */ | |
837 | static int pcs_config_match(unsigned data, unsigned enable, unsigned disable) | |
838 | { | |
839 | int ret = -EINVAL; | |
840 | ||
841 | if (data == enable) | |
842 | ret = 1; | |
843 | else if (data == disable) | |
844 | ret = 0; | |
845 | return ret; | |
846 | } | |
847 | ||
848 | static void add_config(struct pcs_conf_vals **conf, enum pin_config_param param, | |
849 | unsigned value, unsigned enable, unsigned disable, | |
850 | unsigned mask) | |
851 | { | |
852 | (*conf)->param = param; | |
853 | (*conf)->val = value; | |
854 | (*conf)->enable = enable; | |
855 | (*conf)->disable = disable; | |
856 | (*conf)->mask = mask; | |
857 | (*conf)++; | |
858 | } | |
859 | ||
860 | static void add_setting(unsigned long **setting, enum pin_config_param param, | |
861 | unsigned arg) | |
862 | { | |
863 | **setting = pinconf_to_config_packed(param, arg); | |
864 | (*setting)++; | |
865 | } | |
866 | ||
867 | /* add pinconf setting with 2 parameters */ | |
868 | static void pcs_add_conf2(struct pcs_device *pcs, struct device_node *np, | |
869 | const char *name, enum pin_config_param param, | |
870 | struct pcs_conf_vals **conf, unsigned long **settings) | |
871 | { | |
7cba5b3f | 872 | unsigned value[2], shift; |
9dddb4df HZ |
873 | int ret; |
874 | ||
875 | ret = of_property_read_u32_array(np, name, value, 2); | |
876 | if (ret) | |
877 | return; | |
878 | /* set value & mask */ | |
879 | value[0] &= value[1]; | |
7cba5b3f | 880 | shift = ffs(value[1]) - 1; |
9dddb4df HZ |
881 | /* skip enable & disable */ |
882 | add_config(conf, param, value[0], 0, 0, value[1]); | |
7cba5b3f | 883 | add_setting(settings, param, value[0] >> shift); |
9dddb4df HZ |
884 | } |
885 | ||
886 | /* add pinconf setting with 4 parameters */ | |
887 | static void pcs_add_conf4(struct pcs_device *pcs, struct device_node *np, | |
888 | const char *name, enum pin_config_param param, | |
889 | struct pcs_conf_vals **conf, unsigned long **settings) | |
890 | { | |
891 | unsigned value[4]; | |
892 | int ret; | |
893 | ||
894 | /* value to set, enable, disable, mask */ | |
895 | ret = of_property_read_u32_array(np, name, value, 4); | |
896 | if (ret) | |
897 | return; | |
898 | if (!value[3]) { | |
899 | dev_err(pcs->dev, "mask field of the property can't be 0\n"); | |
900 | return; | |
901 | } | |
902 | value[0] &= value[3]; | |
903 | value[1] &= value[3]; | |
904 | value[2] &= value[3]; | |
905 | ret = pcs_config_match(value[0], value[1], value[2]); | |
906 | if (ret < 0) | |
907 | dev_dbg(pcs->dev, "failed to match enable or disable bits\n"); | |
908 | add_config(conf, param, value[0], value[1], value[2], value[3]); | |
909 | add_setting(settings, param, ret); | |
910 | } | |
911 | ||
912 | static int pcs_parse_pinconf(struct pcs_device *pcs, struct device_node *np, | |
913 | struct pcs_function *func, | |
914 | struct pinctrl_map **map) | |
915 | ||
916 | { | |
917 | struct pinctrl_map *m = *map; | |
918 | int i = 0, nconfs = 0; | |
919 | unsigned long *settings = NULL, *s = NULL; | |
920 | struct pcs_conf_vals *conf = NULL; | |
b582658a | 921 | static const struct pcs_conf_type prop2[] = { |
9dddb4df HZ |
922 | { "pinctrl-single,drive-strength", PIN_CONFIG_DRIVE_STRENGTH, }, |
923 | { "pinctrl-single,slew-rate", PIN_CONFIG_SLEW_RATE, }, | |
8c987eb1 | 924 | { "pinctrl-single,input-enable", PIN_CONFIG_INPUT_ENABLE, }, |
9dddb4df | 925 | { "pinctrl-single,input-schmitt", PIN_CONFIG_INPUT_SCHMITT, }, |
31f9a421 | 926 | { "pinctrl-single,low-power-mode", PIN_CONFIG_MODE_LOW_POWER, }, |
9dddb4df | 927 | }; |
b582658a | 928 | static const struct pcs_conf_type prop4[] = { |
9dddb4df HZ |
929 | { "pinctrl-single,bias-pullup", PIN_CONFIG_BIAS_PULL_UP, }, |
930 | { "pinctrl-single,bias-pulldown", PIN_CONFIG_BIAS_PULL_DOWN, }, | |
931 | { "pinctrl-single,input-schmitt-enable", | |
932 | PIN_CONFIG_INPUT_SCHMITT_ENABLE, }, | |
933 | }; | |
934 | ||
935 | /* If pinconf isn't supported, don't parse properties in below. */ | |
02e483f6 | 936 | if (!PCS_HAS_PINCONF) |
f46fe79f | 937 | return -ENOTSUPP; |
9dddb4df HZ |
938 | |
939 | /* cacluate how much properties are supported in current node */ | |
940 | for (i = 0; i < ARRAY_SIZE(prop2); i++) { | |
e0e8fbf8 | 941 | if (of_property_present(np, prop2[i].name)) |
9dddb4df HZ |
942 | nconfs++; |
943 | } | |
944 | for (i = 0; i < ARRAY_SIZE(prop4); i++) { | |
e0e8fbf8 | 945 | if (of_property_present(np, prop4[i].name)) |
9dddb4df HZ |
946 | nconfs++; |
947 | } | |
948 | if (!nconfs) | |
f46fe79f | 949 | return -ENOTSUPP; |
9dddb4df | 950 | |
a86854d0 KC |
951 | func->conf = devm_kcalloc(pcs->dev, |
952 | nconfs, sizeof(struct pcs_conf_vals), | |
9dddb4df HZ |
953 | GFP_KERNEL); |
954 | if (!func->conf) | |
955 | return -ENOMEM; | |
956 | func->nconfs = nconfs; | |
957 | conf = &(func->conf[0]); | |
958 | m++; | |
a86854d0 | 959 | settings = devm_kcalloc(pcs->dev, nconfs, sizeof(unsigned long), |
9dddb4df HZ |
960 | GFP_KERNEL); |
961 | if (!settings) | |
962 | return -ENOMEM; | |
963 | s = &settings[0]; | |
964 | ||
965 | for (i = 0; i < ARRAY_SIZE(prop2); i++) | |
966 | pcs_add_conf2(pcs, np, prop2[i].name, prop2[i].param, | |
967 | &conf, &s); | |
968 | for (i = 0; i < ARRAY_SIZE(prop4); i++) | |
969 | pcs_add_conf4(pcs, np, prop4[i].name, prop4[i].param, | |
970 | &conf, &s); | |
971 | m->type = PIN_MAP_TYPE_CONFIGS_GROUP; | |
972 | m->data.configs.group_or_pin = np->name; | |
973 | m->data.configs.configs = settings; | |
974 | m->data.configs.num_configs = nconfs; | |
975 | return 0; | |
976 | } | |
977 | ||
8b8b091b | 978 | /** |
bc6d2015 | 979 | * pcs_parse_one_pinctrl_entry() - parses a device tree mux entry |
8b8b091b TL |
980 | * @pcs: pinctrl driver instance |
981 | * @np: device node of the mux entry | |
982 | * @map: map entry | |
9dddb4df | 983 | * @num_maps: number of map |
8b8b091b TL |
984 | * @pgnames: pingroup names |
985 | * | |
986 | * Note that this binding currently supports only sets of one register + value. | |
987 | * | |
988 | * Also note that this driver tries to avoid understanding pin and function | |
989 | * names because of the extra bloat they would cause especially in the case of | |
990 | * a large number of pins. This driver just sets what is specified for the board | |
991 | * in the .dts file. Further user space debugging tools can be developed to | |
992 | * decipher the pin and function names using debugfs. | |
993 | * | |
994 | * If you are concerned about the boot time, set up the static pins in | |
995 | * the bootloader, and only set up selected pins as device tree entries. | |
996 | */ | |
997 | static int pcs_parse_one_pinctrl_entry(struct pcs_device *pcs, | |
998 | struct device_node *np, | |
999 | struct pinctrl_map **map, | |
9dddb4df | 1000 | unsigned *num_maps, |
8b8b091b TL |
1001 | const char **pgnames) |
1002 | { | |
4622215f | 1003 | const char *name = "pinctrl-single,pins"; |
8b8b091b | 1004 | struct pcs_func_vals *vals; |
a4ab1086 TL |
1005 | int rows, *pins, found = 0, res = -ENOMEM, i, fsel, gsel; |
1006 | struct pcs_function *function = NULL; | |
8b8b091b | 1007 | |
4622215f | 1008 | rows = pinctrl_count_index_with_args(np, name); |
de7416bc | 1009 | if (rows <= 0) { |
059a6e63 | 1010 | dev_err(pcs->dev, "Invalid number of rows: %d\n", rows); |
de7416bc AH |
1011 | return -EINVAL; |
1012 | } | |
8b8b091b | 1013 | |
a86854d0 | 1014 | vals = devm_kcalloc(pcs->dev, rows, sizeof(*vals), GFP_KERNEL); |
8b8b091b TL |
1015 | if (!vals) |
1016 | return -ENOMEM; | |
1017 | ||
a86854d0 | 1018 | pins = devm_kcalloc(pcs->dev, rows, sizeof(*pins), GFP_KERNEL); |
8b8b091b TL |
1019 | if (!pins) |
1020 | goto free_vals; | |
1021 | ||
4622215f TL |
1022 | for (i = 0; i < rows; i++) { |
1023 | struct of_phandle_args pinctrl_spec; | |
1024 | unsigned int offset; | |
8b8b091b TL |
1025 | int pin; |
1026 | ||
4622215f TL |
1027 | res = pinctrl_parse_index_with_args(np, name, i, &pinctrl_spec); |
1028 | if (res) | |
1029 | return res; | |
1030 | ||
9b9448f3 | 1031 | if (pinctrl_spec.args_count < 2 || pinctrl_spec.args_count > 3) { |
4622215f TL |
1032 | dev_err(pcs->dev, "invalid args_count for spec: %i\n", |
1033 | pinctrl_spec.args_count); | |
1034 | break; | |
1035 | } | |
1036 | ||
4622215f | 1037 | offset = pinctrl_spec.args[0]; |
8b8b091b | 1038 | vals[found].reg = pcs->base + offset; |
a1339541 DF |
1039 | |
1040 | switch (pinctrl_spec.args_count) { | |
1041 | case 2: | |
1042 | vals[found].val = pinctrl_spec.args[1]; | |
1043 | break; | |
1044 | case 3: | |
1045 | vals[found].val = (pinctrl_spec.args[1] | pinctrl_spec.args[2]); | |
1046 | break; | |
1047 | } | |
4622215f | 1048 | |
94f4e54c | 1049 | dev_dbg(pcs->dev, "%pOFn index: 0x%x value: 0x%x\n", |
f4a2b19c | 1050 | pinctrl_spec.np, offset, vals[found].val); |
8b8b091b TL |
1051 | |
1052 | pin = pcs_get_pin_by_offset(pcs, offset); | |
1053 | if (pin < 0) { | |
1054 | dev_err(pcs->dev, | |
94f4e54c RH |
1055 | "could not add functions for %pOFn %ux\n", |
1056 | np, offset); | |
8b8b091b TL |
1057 | break; |
1058 | } | |
1059 | pins[found++] = pin; | |
1060 | } | |
1061 | ||
1062 | pgnames[0] = np->name; | |
a4ab1086 TL |
1063 | mutex_lock(&pcs->mutex); |
1064 | fsel = pcs_add_function(pcs, &function, np->name, vals, found, | |
1065 | pgnames, 1); | |
1066 | if (fsel < 0) { | |
1067 | res = fsel; | |
8b8b091b | 1068 | goto free_pins; |
712778d0 | 1069 | } |
8b8b091b | 1070 | |
a4ab1086 TL |
1071 | gsel = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs); |
1072 | if (gsel < 0) { | |
1073 | res = gsel; | |
8b8b091b | 1074 | goto free_function; |
a4ab1086 | 1075 | } |
8b8b091b TL |
1076 | |
1077 | (*map)->type = PIN_MAP_TYPE_MUX_GROUP; | |
1078 | (*map)->data.mux.group = np->name; | |
1079 | (*map)->data.mux.function = np->name; | |
1080 | ||
a4ab1086 | 1081 | if (PCS_HAS_PINCONF && function) { |
18442e65 | 1082 | res = pcs_parse_pinconf(pcs, np, function, map); |
f46fe79f DF |
1083 | if (res == 0) |
1084 | *num_maps = 2; | |
1085 | else if (res == -ENOTSUPP) | |
1086 | *num_maps = 1; | |
1087 | else | |
9dddb4df | 1088 | goto free_pingroups; |
9dddb4df HZ |
1089 | } else { |
1090 | *num_maps = 1; | |
1091 | } | |
a4ab1086 TL |
1092 | mutex_unlock(&pcs->mutex); |
1093 | ||
8b8b091b TL |
1094 | return 0; |
1095 | ||
9dddb4df | 1096 | free_pingroups: |
a4ab1086 | 1097 | pinctrl_generic_remove_group(pcs->pctl, gsel); |
9dddb4df | 1098 | *num_maps = 1; |
8b8b091b | 1099 | free_function: |
a4ab1086 | 1100 | pinmux_generic_remove_function(pcs->pctl, fsel); |
8b8b091b | 1101 | free_pins: |
673ba5a0 | 1102 | mutex_unlock(&pcs->mutex); |
8b8b091b TL |
1103 | devm_kfree(pcs->dev, pins); |
1104 | ||
4e7e8017 MP |
1105 | free_vals: |
1106 | devm_kfree(pcs->dev, vals); | |
1107 | ||
1108 | return res; | |
1109 | } | |
1110 | ||
4e7e8017 MP |
1111 | static int pcs_parse_bits_in_pinctrl_entry(struct pcs_device *pcs, |
1112 | struct device_node *np, | |
1113 | struct pinctrl_map **map, | |
1114 | unsigned *num_maps, | |
1115 | const char **pgnames) | |
1116 | { | |
dd68a526 | 1117 | const char *name = "pinctrl-single,bits"; |
4e7e8017 | 1118 | struct pcs_func_vals *vals; |
2ac48d0d | 1119 | int rows, *pins, found = 0, res = -ENOMEM, i, fsel; |
4e7e8017 | 1120 | int npins_in_row; |
a4ab1086 | 1121 | struct pcs_function *function = NULL; |
4e7e8017 | 1122 | |
22d5127e | 1123 | rows = pinctrl_count_index_with_args(np, name); |
de7416bc AH |
1124 | if (rows <= 0) { |
1125 | dev_err(pcs->dev, "Invalid number of rows: %d\n", rows); | |
1126 | return -EINVAL; | |
1127 | } | |
4e7e8017 | 1128 | |
2ac48d0d ZL |
1129 | if (PCS_HAS_PINCONF) { |
1130 | dev_err(pcs->dev, "pinconf not supported\n"); | |
1131 | return -ENOTSUPP; | |
1132 | } | |
1133 | ||
4e7e8017 MP |
1134 | npins_in_row = pcs->width / pcs->bits_per_pin; |
1135 | ||
a86854d0 KC |
1136 | vals = devm_kzalloc(pcs->dev, |
1137 | array3_size(rows, npins_in_row, sizeof(*vals)), | |
1138 | GFP_KERNEL); | |
4e7e8017 MP |
1139 | if (!vals) |
1140 | return -ENOMEM; | |
1141 | ||
a86854d0 KC |
1142 | pins = devm_kzalloc(pcs->dev, |
1143 | array3_size(rows, npins_in_row, sizeof(*pins)), | |
1144 | GFP_KERNEL); | |
4e7e8017 MP |
1145 | if (!pins) |
1146 | goto free_vals; | |
1147 | ||
22d5127e TL |
1148 | for (i = 0; i < rows; i++) { |
1149 | struct of_phandle_args pinctrl_spec; | |
4e7e8017 MP |
1150 | unsigned offset, val; |
1151 | unsigned mask, bit_pos, val_pos, mask_pos, submask; | |
1152 | unsigned pin_num_from_lsb; | |
1153 | int pin; | |
1154 | ||
22d5127e TL |
1155 | res = pinctrl_parse_index_with_args(np, name, i, &pinctrl_spec); |
1156 | if (res) | |
1157 | return res; | |
1158 | ||
1159 | if (pinctrl_spec.args_count < 3) { | |
1160 | dev_err(pcs->dev, "invalid args_count for spec: %i\n", | |
1161 | pinctrl_spec.args_count); | |
1162 | break; | |
1163 | } | |
1164 | ||
1165 | /* Index plus two value cells */ | |
1166 | offset = pinctrl_spec.args[0]; | |
1167 | val = pinctrl_spec.args[1]; | |
1168 | mask = pinctrl_spec.args[2]; | |
1169 | ||
94f4e54c RH |
1170 | dev_dbg(pcs->dev, "%pOFn index: 0x%x value: 0x%x mask: 0x%x\n", |
1171 | pinctrl_spec.np, offset, val, mask); | |
4e7e8017 MP |
1172 | |
1173 | /* Parse pins in each row from LSB */ | |
1174 | while (mask) { | |
56b367c0 | 1175 | bit_pos = __ffs(mask); |
4e7e8017 | 1176 | pin_num_from_lsb = bit_pos / pcs->bits_per_pin; |
56b367c0 | 1177 | mask_pos = ((pcs->fmask) << bit_pos); |
4e7e8017 MP |
1178 | val_pos = val & mask_pos; |
1179 | submask = mask & mask_pos; | |
ad5d25fe TV |
1180 | |
1181 | if ((mask & mask_pos) == 0) { | |
1182 | dev_err(pcs->dev, | |
94f4e54c RH |
1183 | "Invalid mask for %pOFn at 0x%x\n", |
1184 | np, offset); | |
ad5d25fe TV |
1185 | break; |
1186 | } | |
1187 | ||
4e7e8017 MP |
1188 | mask &= ~mask_pos; |
1189 | ||
1190 | if (submask != mask_pos) { | |
1191 | dev_warn(pcs->dev, | |
94f4e54c RH |
1192 | "Invalid submask 0x%x for %pOFn at 0x%x\n", |
1193 | submask, np, offset); | |
4e7e8017 MP |
1194 | continue; |
1195 | } | |
1196 | ||
1197 | vals[found].mask = submask; | |
1198 | vals[found].reg = pcs->base + offset; | |
1199 | vals[found].val = val_pos; | |
1200 | ||
1201 | pin = pcs_get_pin_by_offset(pcs, offset); | |
1202 | if (pin < 0) { | |
1203 | dev_err(pcs->dev, | |
94f4e54c RH |
1204 | "could not add functions for %pOFn %ux\n", |
1205 | np, offset); | |
4e7e8017 MP |
1206 | break; |
1207 | } | |
1208 | pins[found++] = pin + pin_num_from_lsb; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | pgnames[0] = np->name; | |
a4ab1086 TL |
1213 | mutex_lock(&pcs->mutex); |
1214 | fsel = pcs_add_function(pcs, &function, np->name, vals, found, | |
1215 | pgnames, 1); | |
1216 | if (fsel < 0) { | |
1217 | res = fsel; | |
4e7e8017 | 1218 | goto free_pins; |
712778d0 | 1219 | } |
4e7e8017 | 1220 | |
2ac48d0d ZL |
1221 | res = pinctrl_generic_add_group(pcs->pctl, np->name, pins, found, pcs); |
1222 | if (res < 0) | |
4e7e8017 MP |
1223 | goto free_function; |
1224 | ||
1225 | (*map)->type = PIN_MAP_TYPE_MUX_GROUP; | |
1226 | (*map)->data.mux.group = np->name; | |
1227 | (*map)->data.mux.function = np->name; | |
1228 | ||
4e7e8017 | 1229 | *num_maps = 1; |
a4ab1086 TL |
1230 | mutex_unlock(&pcs->mutex); |
1231 | ||
4e7e8017 MP |
1232 | return 0; |
1233 | ||
4e7e8017 | 1234 | free_function: |
a4ab1086 | 1235 | pinmux_generic_remove_function(pcs->pctl, fsel); |
4e7e8017 | 1236 | free_pins: |
673ba5a0 | 1237 | mutex_unlock(&pcs->mutex); |
4e7e8017 MP |
1238 | devm_kfree(pcs->dev, pins); |
1239 | ||
8b8b091b TL |
1240 | free_vals: |
1241 | devm_kfree(pcs->dev, vals); | |
1242 | ||
1243 | return res; | |
1244 | } | |
1245 | /** | |
1246 | * pcs_dt_node_to_map() - allocates and parses pinctrl maps | |
1247 | * @pctldev: pinctrl instance | |
1248 | * @np_config: device tree pinmux entry | |
1249 | * @map: array of map entries | |
1250 | * @num_maps: number of maps | |
1251 | */ | |
1252 | static int pcs_dt_node_to_map(struct pinctrl_dev *pctldev, | |
1253 | struct device_node *np_config, | |
1254 | struct pinctrl_map **map, unsigned *num_maps) | |
1255 | { | |
1256 | struct pcs_device *pcs; | |
1257 | const char **pgnames; | |
1258 | int ret; | |
1259 | ||
1260 | pcs = pinctrl_dev_get_drvdata(pctldev); | |
1261 | ||
9dddb4df | 1262 | /* create 2 maps. One is for pinmux, and the other is for pinconf. */ |
a86854d0 | 1263 | *map = devm_kcalloc(pcs->dev, 2, sizeof(**map), GFP_KERNEL); |
00e79d12 | 1264 | if (!*map) |
8b8b091b TL |
1265 | return -ENOMEM; |
1266 | ||
1267 | *num_maps = 0; | |
1268 | ||
1269 | pgnames = devm_kzalloc(pcs->dev, sizeof(*pgnames), GFP_KERNEL); | |
1270 | if (!pgnames) { | |
1271 | ret = -ENOMEM; | |
1272 | goto free_map; | |
1273 | } | |
1274 | ||
4e7e8017 MP |
1275 | if (pcs->bits_per_mux) { |
1276 | ret = pcs_parse_bits_in_pinctrl_entry(pcs, np_config, map, | |
1277 | num_maps, pgnames); | |
1278 | if (ret < 0) { | |
94f4e54c RH |
1279 | dev_err(pcs->dev, "no pins entries for %pOFn\n", |
1280 | np_config); | |
4e7e8017 MP |
1281 | goto free_pgnames; |
1282 | } | |
1283 | } else { | |
1284 | ret = pcs_parse_one_pinctrl_entry(pcs, np_config, map, | |
1285 | num_maps, pgnames); | |
1286 | if (ret < 0) { | |
94f4e54c RH |
1287 | dev_err(pcs->dev, "no pins entries for %pOFn\n", |
1288 | np_config); | |
4e7e8017 MP |
1289 | goto free_pgnames; |
1290 | } | |
8b8b091b | 1291 | } |
8b8b091b TL |
1292 | |
1293 | return 0; | |
1294 | ||
1295 | free_pgnames: | |
1296 | devm_kfree(pcs->dev, pgnames); | |
1297 | free_map: | |
1298 | devm_kfree(pcs->dev, *map); | |
1299 | ||
1300 | return ret; | |
1301 | } | |
1302 | ||
3e6cee17 TL |
1303 | /** |
1304 | * pcs_irq_free() - free interrupt | |
1305 | * @pcs: pcs driver instance | |
1306 | */ | |
1307 | static void pcs_irq_free(struct pcs_device *pcs) | |
1308 | { | |
1309 | struct pcs_soc_data *pcs_soc = &pcs->socdata; | |
1310 | ||
1311 | if (pcs_soc->irq < 0) | |
1312 | return; | |
1313 | ||
1314 | if (pcs->domain) | |
1315 | irq_domain_remove(pcs->domain); | |
1316 | ||
1317 | if (PCS_QUIRK_HAS_SHARED_IRQ) | |
1318 | free_irq(pcs_soc->irq, pcs_soc); | |
1319 | else | |
1320 | irq_set_chained_handler(pcs_soc->irq, NULL); | |
1321 | } | |
1322 | ||
8b8b091b TL |
1323 | /** |
1324 | * pcs_free_resources() - free memory used by this driver | |
1325 | * @pcs: pcs driver instance | |
1326 | */ | |
1327 | static void pcs_free_resources(struct pcs_device *pcs) | |
1328 | { | |
3e6cee17 | 1329 | pcs_irq_free(pcs); |
f10a2585 | 1330 | pinctrl_unregister(pcs->pctl); |
caeb774e | 1331 | |
4622215f TL |
1332 | #if IS_BUILTIN(CONFIG_PINCTRL_SINGLE) |
1333 | if (pcs->missing_nr_pinctrl_cells) | |
1334 | of_remove_property(pcs->np, pcs->missing_nr_pinctrl_cells); | |
1335 | #endif | |
8b8b091b TL |
1336 | } |
1337 | ||
a1a277eb HZ |
1338 | static int pcs_add_gpio_func(struct device_node *node, struct pcs_device *pcs) |
1339 | { | |
1340 | const char *propname = "pinctrl-single,gpio-range"; | |
1341 | const char *cellname = "#pinctrl-single,gpio-range-cells"; | |
1342 | struct of_phandle_args gpiospec; | |
1343 | struct pcs_gpiofunc_range *range; | |
1344 | int ret, i; | |
1345 | ||
1346 | for (i = 0; ; i++) { | |
1347 | ret = of_parse_phandle_with_args(node, propname, cellname, | |
1348 | i, &gpiospec); | |
1349 | /* Do not treat it as error. Only treat it as end condition. */ | |
1350 | if (ret) { | |
1351 | ret = 0; | |
1352 | break; | |
1353 | } | |
1354 | range = devm_kzalloc(pcs->dev, sizeof(*range), GFP_KERNEL); | |
1355 | if (!range) { | |
1356 | ret = -ENOMEM; | |
1357 | break; | |
1358 | } | |
1359 | range->offset = gpiospec.args[0]; | |
1360 | range->npins = gpiospec.args[1]; | |
1361 | range->gpiofunc = gpiospec.args[2]; | |
1362 | mutex_lock(&pcs->mutex); | |
1363 | list_add_tail(&range->node, &pcs->gpiofuncs); | |
1364 | mutex_unlock(&pcs->mutex); | |
1365 | } | |
1366 | return ret; | |
1367 | } | |
0ba5ab00 | 1368 | |
3e6cee17 | 1369 | /** |
0ba5ab00 | 1370 | * struct pcs_interrupt |
3e6cee17 TL |
1371 | * @reg: virtual address of interrupt register |
1372 | * @hwirq: hardware irq number | |
1373 | * @irq: virtual irq number | |
1374 | * @node: list node | |
1375 | */ | |
1376 | struct pcs_interrupt { | |
1377 | void __iomem *reg; | |
1378 | irq_hw_number_t hwirq; | |
1379 | unsigned int irq; | |
1380 | struct list_head node; | |
1381 | }; | |
1382 | ||
1383 | /** | |
1384 | * pcs_irq_set() - enables or disables an interrupt | |
0ba5ab00 LJ |
1385 | * @pcs_soc: SoC specific settings |
1386 | * @irq: interrupt | |
1387 | * @enable: enable or disable the interrupt | |
3e6cee17 TL |
1388 | * |
1389 | * Note that this currently assumes one interrupt per pinctrl | |
1390 | * register that is typically used for wake-up events. | |
1391 | */ | |
1392 | static inline void pcs_irq_set(struct pcs_soc_data *pcs_soc, | |
1393 | int irq, const bool enable) | |
1394 | { | |
1395 | struct pcs_device *pcs; | |
1396 | struct list_head *pos; | |
1397 | unsigned mask; | |
1398 | ||
1399 | pcs = container_of(pcs_soc, struct pcs_device, socdata); | |
1400 | list_for_each(pos, &pcs->irqs) { | |
1401 | struct pcs_interrupt *pcswi; | |
1402 | unsigned soc_mask; | |
1403 | ||
1404 | pcswi = list_entry(pos, struct pcs_interrupt, node); | |
1405 | if (irq != pcswi->irq) | |
1406 | continue; | |
1407 | ||
1408 | soc_mask = pcs_soc->irq_enable_mask; | |
1409 | raw_spin_lock(&pcs->lock); | |
1410 | mask = pcs->read(pcswi->reg); | |
1411 | if (enable) | |
1412 | mask |= soc_mask; | |
1413 | else | |
1414 | mask &= ~soc_mask; | |
1415 | pcs->write(mask, pcswi->reg); | |
0ac3c0a4 TL |
1416 | |
1417 | /* flush posted write */ | |
1418 | mask = pcs->read(pcswi->reg); | |
3e6cee17 TL |
1419 | raw_spin_unlock(&pcs->lock); |
1420 | } | |
c9b3a7d2 RQ |
1421 | |
1422 | if (pcs_soc->rearm) | |
1423 | pcs_soc->rearm(); | |
3e6cee17 TL |
1424 | } |
1425 | ||
1426 | /** | |
1427 | * pcs_irq_mask() - mask pinctrl interrupt | |
1428 | * @d: interrupt data | |
1429 | */ | |
1430 | static void pcs_irq_mask(struct irq_data *d) | |
1431 | { | |
1432 | struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d); | |
1433 | ||
1434 | pcs_irq_set(pcs_soc, d->irq, false); | |
1435 | } | |
1436 | ||
1437 | /** | |
1438 | * pcs_irq_unmask() - unmask pinctrl interrupt | |
1439 | * @d: interrupt data | |
1440 | */ | |
1441 | static void pcs_irq_unmask(struct irq_data *d) | |
1442 | { | |
1443 | struct pcs_soc_data *pcs_soc = irq_data_get_irq_chip_data(d); | |
1444 | ||
1445 | pcs_irq_set(pcs_soc, d->irq, true); | |
1446 | } | |
1447 | ||
1448 | /** | |
1449 | * pcs_irq_set_wake() - toggle the suspend and resume wake up | |
1450 | * @d: interrupt data | |
1451 | * @state: wake-up state | |
1452 | * | |
1453 | * Note that this should be called only for suspend and resume. | |
1454 | * For runtime PM, the wake-up events should be enabled by default. | |
1455 | */ | |
1456 | static int pcs_irq_set_wake(struct irq_data *d, unsigned int state) | |
1457 | { | |
1458 | if (state) | |
1459 | pcs_irq_unmask(d); | |
1460 | else | |
1461 | pcs_irq_mask(d); | |
1462 | ||
1463 | return 0; | |
1464 | } | |
1465 | ||
1466 | /** | |
1467 | * pcs_irq_handle() - common interrupt handler | |
0ba5ab00 | 1468 | * @pcs_soc: SoC specific settings |
3e6cee17 TL |
1469 | * |
1470 | * Note that this currently assumes we have one interrupt bit per | |
1471 | * mux register. This interrupt is typically used for wake-up events. | |
1472 | * For more complex interrupts different handlers can be specified. | |
1473 | */ | |
1474 | static int pcs_irq_handle(struct pcs_soc_data *pcs_soc) | |
1475 | { | |
1476 | struct pcs_device *pcs; | |
1477 | struct list_head *pos; | |
1478 | int count = 0; | |
1479 | ||
1480 | pcs = container_of(pcs_soc, struct pcs_device, socdata); | |
1481 | list_for_each(pos, &pcs->irqs) { | |
1482 | struct pcs_interrupt *pcswi; | |
1483 | unsigned mask; | |
1484 | ||
1485 | pcswi = list_entry(pos, struct pcs_interrupt, node); | |
1486 | raw_spin_lock(&pcs->lock); | |
1487 | mask = pcs->read(pcswi->reg); | |
1488 | raw_spin_unlock(&pcs->lock); | |
1489 | if (mask & pcs_soc->irq_status_mask) { | |
a9cb09b7 MZ |
1490 | generic_handle_domain_irq(pcs->domain, |
1491 | pcswi->hwirq); | |
3e6cee17 TL |
1492 | count++; |
1493 | } | |
1494 | } | |
1495 | ||
1496 | return count; | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * pcs_irq_handler() - handler for the shared interrupt case | |
1501 | * @irq: interrupt | |
1502 | * @d: data | |
1503 | * | |
1504 | * Use this for cases where multiple instances of | |
1505 | * pinctrl-single share a single interrupt like on omaps. | |
1506 | */ | |
1507 | static irqreturn_t pcs_irq_handler(int irq, void *d) | |
1508 | { | |
1509 | struct pcs_soc_data *pcs_soc = d; | |
1510 | ||
1511 | return pcs_irq_handle(pcs_soc) ? IRQ_HANDLED : IRQ_NONE; | |
1512 | } | |
1513 | ||
1514 | /** | |
b9045af9 | 1515 | * pcs_irq_chain_handler() - handler for the dedicated chained interrupt case |
3e6cee17 TL |
1516 | * @desc: interrupt descriptor |
1517 | * | |
1518 | * Use this if you have a separate interrupt for each | |
1519 | * pinctrl-single instance. | |
1520 | */ | |
bd0b9ac4 | 1521 | static void pcs_irq_chain_handler(struct irq_desc *desc) |
3e6cee17 TL |
1522 | { |
1523 | struct pcs_soc_data *pcs_soc = irq_desc_get_handler_data(desc); | |
1524 | struct irq_chip *chip; | |
3e6cee17 | 1525 | |
5663bb27 | 1526 | chip = irq_desc_get_chip(desc); |
3e6cee17 | 1527 | chained_irq_enter(chip, desc); |
849bfe06 | 1528 | pcs_irq_handle(pcs_soc); |
3e6cee17 TL |
1529 | /* REVISIT: export and add handle_bad_irq(irq, desc)? */ |
1530 | chained_irq_exit(chip, desc); | |
3e6cee17 TL |
1531 | } |
1532 | ||
1533 | static int pcs_irqdomain_map(struct irq_domain *d, unsigned int irq, | |
1534 | irq_hw_number_t hwirq) | |
1535 | { | |
1536 | struct pcs_soc_data *pcs_soc = d->host_data; | |
1537 | struct pcs_device *pcs; | |
1538 | struct pcs_interrupt *pcswi; | |
1539 | ||
1540 | pcs = container_of(pcs_soc, struct pcs_device, socdata); | |
1541 | pcswi = devm_kzalloc(pcs->dev, sizeof(*pcswi), GFP_KERNEL); | |
1542 | if (!pcswi) | |
1543 | return -ENOMEM; | |
1544 | ||
1545 | pcswi->reg = pcs->base + hwirq; | |
1546 | pcswi->hwirq = hwirq; | |
1547 | pcswi->irq = irq; | |
1548 | ||
1549 | mutex_lock(&pcs->mutex); | |
1550 | list_add_tail(&pcswi->node, &pcs->irqs); | |
1551 | mutex_unlock(&pcs->mutex); | |
1552 | ||
1553 | irq_set_chip_data(irq, pcs_soc); | |
1554 | irq_set_chip_and_handler(irq, &pcs->chip, | |
1555 | handle_level_irq); | |
39c3fd58 | 1556 | irq_set_lockdep_class(irq, &pcs_lock_class, &pcs_request_class); |
1b9c0fb3 | 1557 | irq_set_noprobe(irq); |
3e6cee17 TL |
1558 | |
1559 | return 0; | |
1560 | } | |
1561 | ||
e5b60953 | 1562 | static const struct irq_domain_ops pcs_irqdomain_ops = { |
3e6cee17 TL |
1563 | .map = pcs_irqdomain_map, |
1564 | .xlate = irq_domain_xlate_onecell, | |
1565 | }; | |
1566 | ||
1567 | /** | |
1568 | * pcs_irq_init_chained_handler() - set up a chained interrupt handler | |
1569 | * @pcs: pcs driver instance | |
1570 | * @np: device node pointer | |
1571 | */ | |
1572 | static int pcs_irq_init_chained_handler(struct pcs_device *pcs, | |
1573 | struct device_node *np) | |
1574 | { | |
1575 | struct pcs_soc_data *pcs_soc = &pcs->socdata; | |
1576 | const char *name = "pinctrl"; | |
1577 | int num_irqs; | |
1578 | ||
1579 | if (!pcs_soc->irq_enable_mask || | |
1580 | !pcs_soc->irq_status_mask) { | |
1581 | pcs_soc->irq = -1; | |
1582 | return -EINVAL; | |
1583 | } | |
1584 | ||
1585 | INIT_LIST_HEAD(&pcs->irqs); | |
1586 | pcs->chip.name = name; | |
1587 | pcs->chip.irq_ack = pcs_irq_mask; | |
1588 | pcs->chip.irq_mask = pcs_irq_mask; | |
1589 | pcs->chip.irq_unmask = pcs_irq_unmask; | |
1590 | pcs->chip.irq_set_wake = pcs_irq_set_wake; | |
1591 | ||
1592 | if (PCS_QUIRK_HAS_SHARED_IRQ) { | |
1593 | int res; | |
1594 | ||
1595 | res = request_irq(pcs_soc->irq, pcs_irq_handler, | |
c10372e6 GS |
1596 | IRQF_SHARED | IRQF_NO_SUSPEND | |
1597 | IRQF_NO_THREAD, | |
3e6cee17 TL |
1598 | name, pcs_soc); |
1599 | if (res) { | |
1600 | pcs_soc->irq = -1; | |
1601 | return res; | |
1602 | } | |
1603 | } else { | |
20d5d142 TG |
1604 | irq_set_chained_handler_and_data(pcs_soc->irq, |
1605 | pcs_irq_chain_handler, | |
1606 | pcs_soc); | |
3e6cee17 TL |
1607 | } |
1608 | ||
1609 | /* | |
1610 | * We can use the register offset as the hardirq | |
1611 | * number as irq_domain_add_simple maps them lazily. | |
1612 | * This way we can easily support more than one | |
1613 | * interrupt per function if needed. | |
1614 | */ | |
1615 | num_irqs = pcs->size; | |
1616 | ||
1617 | pcs->domain = irq_domain_add_simple(np, num_irqs, 0, | |
1618 | &pcs_irqdomain_ops, | |
1619 | pcs_soc); | |
1620 | if (!pcs->domain) { | |
1621 | irq_set_chained_handler(pcs_soc->irq, NULL); | |
1622 | return -EINVAL; | |
1623 | } | |
1624 | ||
1625 | return 0; | |
1626 | } | |
a1a277eb | 1627 | |
8cb440ab | 1628 | #ifdef CONFIG_PM |
88a1dbde K |
1629 | static int pcs_save_context(struct pcs_device *pcs) |
1630 | { | |
1631 | int i, mux_bytes; | |
1632 | u64 *regsl; | |
1633 | u32 *regsw; | |
1634 | u16 *regshw; | |
1635 | ||
1636 | mux_bytes = pcs->width / BITS_PER_BYTE; | |
1637 | ||
7f57871f | 1638 | if (!pcs->saved_vals) { |
88a1dbde | 1639 | pcs->saved_vals = devm_kzalloc(pcs->dev, pcs->size, GFP_ATOMIC); |
7f57871f CIK |
1640 | if (!pcs->saved_vals) |
1641 | return -ENOMEM; | |
1642 | } | |
88a1dbde K |
1643 | |
1644 | switch (pcs->width) { | |
1645 | case 64: | |
7d71b5f4 GU |
1646 | regsl = pcs->saved_vals; |
1647 | for (i = 0; i < pcs->size; i += mux_bytes) | |
1648 | *regsl++ = pcs->read(pcs->base + i); | |
88a1dbde K |
1649 | break; |
1650 | case 32: | |
7d71b5f4 GU |
1651 | regsw = pcs->saved_vals; |
1652 | for (i = 0; i < pcs->size; i += mux_bytes) | |
1653 | *regsw++ = pcs->read(pcs->base + i); | |
88a1dbde K |
1654 | break; |
1655 | case 16: | |
7d71b5f4 GU |
1656 | regshw = pcs->saved_vals; |
1657 | for (i = 0; i < pcs->size; i += mux_bytes) | |
1658 | *regshw++ = pcs->read(pcs->base + i); | |
88a1dbde K |
1659 | break; |
1660 | } | |
1661 | ||
1662 | return 0; | |
1663 | } | |
1664 | ||
1665 | static void pcs_restore_context(struct pcs_device *pcs) | |
1666 | { | |
1667 | int i, mux_bytes; | |
1668 | u64 *regsl; | |
1669 | u32 *regsw; | |
1670 | u16 *regshw; | |
1671 | ||
1672 | mux_bytes = pcs->width / BITS_PER_BYTE; | |
1673 | ||
1674 | switch (pcs->width) { | |
1675 | case 64: | |
7d71b5f4 GU |
1676 | regsl = pcs->saved_vals; |
1677 | for (i = 0; i < pcs->size; i += mux_bytes) | |
1678 | pcs->write(*regsl++, pcs->base + i); | |
88a1dbde K |
1679 | break; |
1680 | case 32: | |
7d71b5f4 GU |
1681 | regsw = pcs->saved_vals; |
1682 | for (i = 0; i < pcs->size; i += mux_bytes) | |
1683 | pcs->write(*regsw++, pcs->base + i); | |
88a1dbde K |
1684 | break; |
1685 | case 16: | |
7d71b5f4 GU |
1686 | regshw = pcs->saved_vals; |
1687 | for (i = 0; i < pcs->size; i += mux_bytes) | |
1688 | pcs->write(*regshw++, pcs->base + i); | |
88a1dbde K |
1689 | break; |
1690 | } | |
1691 | } | |
1692 | ||
0f9bc4bc HG |
1693 | static int pinctrl_single_suspend(struct platform_device *pdev, |
1694 | pm_message_t state) | |
1695 | { | |
1696 | struct pcs_device *pcs; | |
1697 | ||
1698 | pcs = platform_get_drvdata(pdev); | |
1699 | if (!pcs) | |
1700 | return -EINVAL; | |
1701 | ||
7f57871f CIK |
1702 | if (pcs->flags & PCS_CONTEXT_LOSS_OFF) { |
1703 | int ret; | |
1704 | ||
1705 | ret = pcs_save_context(pcs); | |
1706 | if (ret < 0) | |
1707 | return ret; | |
1708 | } | |
88a1dbde | 1709 | |
0f9bc4bc HG |
1710 | return pinctrl_force_sleep(pcs->pctl); |
1711 | } | |
1712 | ||
1713 | static int pinctrl_single_resume(struct platform_device *pdev) | |
1714 | { | |
1715 | struct pcs_device *pcs; | |
1716 | ||
1717 | pcs = platform_get_drvdata(pdev); | |
1718 | if (!pcs) | |
1719 | return -EINVAL; | |
1720 | ||
88a1dbde K |
1721 | if (pcs->flags & PCS_CONTEXT_LOSS_OFF) |
1722 | pcs_restore_context(pcs); | |
1723 | ||
0f9bc4bc HG |
1724 | return pinctrl_force_default(pcs->pctl); |
1725 | } | |
8cb440ab | 1726 | #endif |
0f9bc4bc | 1727 | |
4622215f TL |
1728 | /** |
1729 | * pcs_quirk_missing_pinctrl_cells - handle legacy binding | |
1730 | * @pcs: pinctrl driver instance | |
1731 | * @np: device tree node | |
1732 | * @cells: number of cells | |
1733 | * | |
1734 | * Handle legacy binding with no #pinctrl-cells. This should be | |
1735 | * always two pinctrl-single,bit-per-mux and one for others. | |
1736 | * At some point we may want to consider removing this. | |
1737 | */ | |
1738 | static int pcs_quirk_missing_pinctrl_cells(struct pcs_device *pcs, | |
1739 | struct device_node *np, | |
1740 | int cells) | |
1741 | { | |
1742 | struct property *p; | |
1743 | const char *name = "#pinctrl-cells"; | |
1744 | int error; | |
1745 | u32 val; | |
1746 | ||
1747 | error = of_property_read_u32(np, name, &val); | |
1748 | if (!error) | |
1749 | return 0; | |
1750 | ||
1751 | dev_warn(pcs->dev, "please update dts to use %s = <%i>\n", | |
1752 | name, cells); | |
1753 | ||
1754 | p = devm_kzalloc(pcs->dev, sizeof(*p), GFP_KERNEL); | |
1755 | if (!p) | |
1756 | return -ENOMEM; | |
1757 | ||
1758 | p->length = sizeof(__be32); | |
1759 | p->value = devm_kzalloc(pcs->dev, sizeof(__be32), GFP_KERNEL); | |
1760 | if (!p->value) | |
1761 | return -ENOMEM; | |
1762 | *(__be32 *)p->value = cpu_to_be32(cells); | |
1763 | ||
1764 | p->name = devm_kstrdup(pcs->dev, name, GFP_KERNEL); | |
1765 | if (!p->name) | |
1766 | return -ENOMEM; | |
1767 | ||
1768 | pcs->missing_nr_pinctrl_cells = p; | |
1769 | ||
1770 | #if IS_BUILTIN(CONFIG_PINCTRL_SINGLE) | |
1771 | error = of_add_property(np, pcs->missing_nr_pinctrl_cells); | |
1772 | #endif | |
1773 | ||
1774 | return error; | |
1775 | } | |
1776 | ||
150632b0 | 1777 | static int pcs_probe(struct platform_device *pdev) |
8b8b091b TL |
1778 | { |
1779 | struct device_node *np = pdev->dev.of_node; | |
dc7743aa | 1780 | struct pcs_pdata *pdata; |
8b8b091b TL |
1781 | struct resource *res; |
1782 | struct pcs_device *pcs; | |
02e483f6 | 1783 | const struct pcs_soc_data *soc; |
8b8b091b TL |
1784 | int ret; |
1785 | ||
1a8764f4 MY |
1786 | soc = of_device_get_match_data(&pdev->dev); |
1787 | if (WARN_ON(!soc)) | |
8b8b091b TL |
1788 | return -EINVAL; |
1789 | ||
1790 | pcs = devm_kzalloc(&pdev->dev, sizeof(*pcs), GFP_KERNEL); | |
a14aa271 | 1791 | if (!pcs) |
8b8b091b | 1792 | return -ENOMEM; |
a14aa271 | 1793 | |
8b8b091b | 1794 | pcs->dev = &pdev->dev; |
4622215f | 1795 | pcs->np = np; |
3e6cee17 | 1796 | raw_spin_lock_init(&pcs->lock); |
8b8b091b | 1797 | mutex_init(&pcs->mutex); |
a1a277eb | 1798 | INIT_LIST_HEAD(&pcs->gpiofuncs); |
02e483f6 | 1799 | pcs->flags = soc->flags; |
3e6cee17 | 1800 | memcpy(&pcs->socdata, soc, sizeof(*soc)); |
8b8b091b | 1801 | |
cd23604a TL |
1802 | ret = of_property_read_u32(np, "pinctrl-single,register-width", |
1803 | &pcs->width); | |
1804 | if (ret) { | |
1805 | dev_err(pcs->dev, "register width not specified\n"); | |
1806 | ||
1807 | return ret; | |
1808 | } | |
8b8b091b | 1809 | |
477ac771 HZ |
1810 | ret = of_property_read_u32(np, "pinctrl-single,function-mask", |
1811 | &pcs->fmask); | |
1812 | if (!ret) { | |
56b367c0 | 1813 | pcs->fshift = __ffs(pcs->fmask); |
477ac771 HZ |
1814 | pcs->fmax = pcs->fmask >> pcs->fshift; |
1815 | } else { | |
1816 | /* If mask property doesn't exist, function mux is invalid. */ | |
1817 | pcs->fmask = 0; | |
1818 | pcs->fshift = 0; | |
1819 | pcs->fmax = 0; | |
1820 | } | |
8b8b091b TL |
1821 | |
1822 | ret = of_property_read_u32(np, "pinctrl-single,function-off", | |
1823 | &pcs->foff); | |
1824 | if (ret) | |
1825 | pcs->foff = PCS_OFF_DISABLED; | |
1826 | ||
9e605cb6 PU |
1827 | pcs->bits_per_mux = of_property_read_bool(np, |
1828 | "pinctrl-single,bit-per-mux"); | |
4622215f TL |
1829 | ret = pcs_quirk_missing_pinctrl_cells(pcs, np, |
1830 | pcs->bits_per_mux ? 2 : 1); | |
1831 | if (ret) { | |
1832 | dev_err(&pdev->dev, "unable to patch #pinctrl-cells\n"); | |
1833 | ||
1834 | return ret; | |
1835 | } | |
9e605cb6 | 1836 | |
8b8b091b TL |
1837 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1838 | if (!res) { | |
1839 | dev_err(pcs->dev, "could not get resource\n"); | |
1840 | return -ENODEV; | |
1841 | } | |
1842 | ||
1843 | pcs->res = devm_request_mem_region(pcs->dev, res->start, | |
1844 | resource_size(res), DRIVER_NAME); | |
1845 | if (!pcs->res) { | |
1846 | dev_err(pcs->dev, "could not get mem_region\n"); | |
1847 | return -EBUSY; | |
1848 | } | |
1849 | ||
1850 | pcs->size = resource_size(pcs->res); | |
1851 | pcs->base = devm_ioremap(pcs->dev, pcs->res->start, pcs->size); | |
1852 | if (!pcs->base) { | |
1853 | dev_err(pcs->dev, "could not ioremap\n"); | |
1854 | return -ENODEV; | |
1855 | } | |
1856 | ||
8b8b091b TL |
1857 | platform_set_drvdata(pdev, pcs); |
1858 | ||
1859 | switch (pcs->width) { | |
1860 | case 8: | |
1861 | pcs->read = pcs_readb; | |
1862 | pcs->write = pcs_writeb; | |
1863 | break; | |
1864 | case 16: | |
1865 | pcs->read = pcs_readw; | |
1866 | pcs->write = pcs_writew; | |
1867 | break; | |
1868 | case 32: | |
1869 | pcs->read = pcs_readl; | |
1870 | pcs->write = pcs_writel; | |
1871 | break; | |
1872 | default: | |
1873 | break; | |
1874 | } | |
1875 | ||
1876 | pcs->desc.name = DRIVER_NAME; | |
1877 | pcs->desc.pctlops = &pcs_pinctrl_ops; | |
1878 | pcs->desc.pmxops = &pcs_pinmux_ops; | |
02e483f6 | 1879 | if (PCS_HAS_PINCONF) |
a7bbdd7f | 1880 | pcs->desc.confops = &pcs_pinconf_ops; |
8b8b091b TL |
1881 | pcs->desc.owner = THIS_MODULE; |
1882 | ||
1883 | ret = pcs_allocate_pin_table(pcs); | |
1884 | if (ret < 0) | |
1885 | goto free; | |
1886 | ||
950b0d91 TL |
1887 | ret = pinctrl_register_and_init(&pcs->desc, pcs->dev, pcs, &pcs->pctl); |
1888 | if (ret) { | |
8b8b091b | 1889 | dev_err(pcs->dev, "could not register single pinctrl driver\n"); |
8b8b091b TL |
1890 | goto free; |
1891 | } | |
1892 | ||
a1a277eb HZ |
1893 | ret = pcs_add_gpio_func(np, pcs); |
1894 | if (ret < 0) | |
1895 | goto free; | |
1896 | ||
3e6cee17 TL |
1897 | pcs->socdata.irq = irq_of_parse_and_map(np, 0); |
1898 | if (pcs->socdata.irq) | |
1899 | pcs->flags |= PCS_FEAT_IRQ; | |
1900 | ||
dc7743aa TL |
1901 | /* We still need auxdata for some omaps for PRM interrupts */ |
1902 | pdata = dev_get_platdata(&pdev->dev); | |
1903 | if (pdata) { | |
1904 | if (pdata->rearm) | |
1905 | pcs->socdata.rearm = pdata->rearm; | |
1906 | if (pdata->irq) { | |
1907 | pcs->socdata.irq = pdata->irq; | |
1908 | pcs->flags |= PCS_FEAT_IRQ; | |
1909 | } | |
1910 | } | |
1911 | ||
3e6cee17 TL |
1912 | if (PCS_HAS_IRQ) { |
1913 | ret = pcs_irq_init_chained_handler(pcs, np); | |
1914 | if (ret < 0) | |
1915 | dev_warn(pcs->dev, "initialized with no interrupts\n"); | |
1916 | } | |
1917 | ||
c2584927 | 1918 | dev_info(pcs->dev, "%i pins, size %u\n", pcs->desc.npins, pcs->size); |
8b8b091b | 1919 | |
61187142 | 1920 | return pinctrl_enable(pcs->pctl); |
8b8b091b TL |
1921 | |
1922 | free: | |
1923 | pcs_free_resources(pcs); | |
1924 | ||
1925 | return ret; | |
1926 | } | |
1927 | ||
f90f54b3 | 1928 | static int pcs_remove(struct platform_device *pdev) |
8b8b091b TL |
1929 | { |
1930 | struct pcs_device *pcs = platform_get_drvdata(pdev); | |
1931 | ||
1932 | if (!pcs) | |
1933 | return 0; | |
1934 | ||
1935 | pcs_free_resources(pcs); | |
1936 | ||
1937 | return 0; | |
1938 | } | |
1939 | ||
3e6cee17 TL |
1940 | static const struct pcs_soc_data pinctrl_single_omap_wkup = { |
1941 | .flags = PCS_QUIRK_SHARED_IRQ, | |
1942 | .irq_enable_mask = (1 << 14), /* OMAP_WAKEUP_EN */ | |
1943 | .irq_status_mask = (1 << 15), /* OMAP_WAKEUP_EVENT */ | |
1944 | }; | |
1945 | ||
31320bea | 1946 | static const struct pcs_soc_data pinctrl_single_dra7 = { |
31320bea NM |
1947 | .irq_enable_mask = (1 << 24), /* WAKEUPENABLE */ |
1948 | .irq_status_mask = (1 << 25), /* WAKEUPEVENT */ | |
1949 | }; | |
1950 | ||
aa2293d8 | 1951 | static const struct pcs_soc_data pinctrl_single_am437x = { |
88a1dbde | 1952 | .flags = PCS_QUIRK_SHARED_IRQ | PCS_CONTEXT_LOSS_OFF, |
aa2293d8 K |
1953 | .irq_enable_mask = (1 << 29), /* OMAP_WAKEUP_EN */ |
1954 | .irq_status_mask = (1 << 30), /* OMAP_WAKEUP_EVENT */ | |
1955 | }; | |
1956 | ||
0cec950d TL |
1957 | static const struct pcs_soc_data pinctrl_single_am654 = { |
1958 | .flags = PCS_QUIRK_SHARED_IRQ | PCS_CONTEXT_LOSS_OFF, | |
1959 | .irq_enable_mask = (1 << 29), /* WKUP_EN */ | |
1960 | .irq_status_mask = (1 << 30), /* WKUP_EVT */ | |
1961 | }; | |
1962 | ||
02e483f6 TL |
1963 | static const struct pcs_soc_data pinctrl_single = { |
1964 | }; | |
1965 | ||
1966 | static const struct pcs_soc_data pinconf_single = { | |
1967 | .flags = PCS_FEAT_PINCONF, | |
1968 | }; | |
1969 | ||
baa9946e | 1970 | static const struct of_device_id pcs_of_match[] = { |
0cec950d TL |
1971 | { .compatible = "ti,am437-padconf", .data = &pinctrl_single_am437x }, |
1972 | { .compatible = "ti,am654-padconf", .data = &pinctrl_single_am654 }, | |
1973 | { .compatible = "ti,dra7-padconf", .data = &pinctrl_single_dra7 }, | |
3e6cee17 TL |
1974 | { .compatible = "ti,omap3-padconf", .data = &pinctrl_single_omap_wkup }, |
1975 | { .compatible = "ti,omap4-padconf", .data = &pinctrl_single_omap_wkup }, | |
1976 | { .compatible = "ti,omap5-padconf", .data = &pinctrl_single_omap_wkup }, | |
02e483f6 TL |
1977 | { .compatible = "pinctrl-single", .data = &pinctrl_single }, |
1978 | { .compatible = "pinconf-single", .data = &pinconf_single }, | |
8b8b091b TL |
1979 | { }, |
1980 | }; | |
1981 | MODULE_DEVICE_TABLE(of, pcs_of_match); | |
1982 | ||
1983 | static struct platform_driver pcs_driver = { | |
1984 | .probe = pcs_probe, | |
2a36f086 | 1985 | .remove = pcs_remove, |
8b8b091b | 1986 | .driver = { |
8b8b091b TL |
1987 | .name = DRIVER_NAME, |
1988 | .of_match_table = pcs_of_match, | |
1989 | }, | |
0f9bc4bc HG |
1990 | #ifdef CONFIG_PM |
1991 | .suspend = pinctrl_single_suspend, | |
1992 | .resume = pinctrl_single_resume, | |
1993 | #endif | |
8b8b091b TL |
1994 | }; |
1995 | ||
1996 | module_platform_driver(pcs_driver); | |
1997 | ||
1998 | MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); | |
1999 | MODULE_DESCRIPTION("One-register-per-pin type device tree based pinctrl driver"); | |
2000 | MODULE_LICENSE("GPL v2"); |