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1948d5c5 RT |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright (C) 2019 Intel Corporation */ | |
3 | ||
4 | #include <linux/gpio/driver.h> | |
5 | #include <linux/module.h> | |
6 | #include <linux/of.h> | |
7 | #include <linux/of_address.h> | |
8 | #include <linux/of_irq.h> | |
9 | #include <linux/pinctrl/pinctrl.h> | |
10 | #include <linux/pinctrl/pinconf.h> | |
11 | #include <linux/pinctrl/pinconf-generic.h> | |
12 | #include <linux/pinctrl/pinmux.h> | |
13 | #include <linux/platform_device.h> | |
14 | ||
15 | #include "core.h" | |
16 | #include "pinconf.h" | |
17 | #include "pinmux.h" | |
18 | #include "pinctrl-equilibrium.h" | |
19 | ||
20 | #define PIN_NAME_FMT "io-%d" | |
21 | #define PIN_NAME_LEN 10 | |
22 | #define PAD_REG_OFF 0x100 | |
23 | ||
24 | static void eqbr_gpio_disable_irq(struct irq_data *d) | |
25 | { | |
26 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); | |
27 | struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc); | |
28 | unsigned int offset = irqd_to_hwirq(d); | |
29 | unsigned long flags; | |
30 | ||
31 | raw_spin_lock_irqsave(&gctrl->lock, flags); | |
32 | writel(BIT(offset), gctrl->membase + GPIO_IRNENCLR); | |
33 | raw_spin_unlock_irqrestore(&gctrl->lock, flags); | |
34 | } | |
35 | ||
36 | static void eqbr_gpio_enable_irq(struct irq_data *d) | |
37 | { | |
38 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); | |
39 | struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc); | |
40 | unsigned int offset = irqd_to_hwirq(d); | |
41 | unsigned long flags; | |
42 | ||
43 | gc->direction_input(gc, offset); | |
44 | raw_spin_lock_irqsave(&gctrl->lock, flags); | |
45 | writel(BIT(offset), gctrl->membase + GPIO_IRNRNSET); | |
46 | raw_spin_unlock_irqrestore(&gctrl->lock, flags); | |
47 | } | |
48 | ||
49 | static void eqbr_gpio_ack_irq(struct irq_data *d) | |
50 | { | |
51 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); | |
52 | struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc); | |
53 | unsigned int offset = irqd_to_hwirq(d); | |
54 | unsigned long flags; | |
55 | ||
56 | raw_spin_lock_irqsave(&gctrl->lock, flags); | |
57 | writel(BIT(offset), gctrl->membase + GPIO_IRNCR); | |
58 | raw_spin_unlock_irqrestore(&gctrl->lock, flags); | |
59 | } | |
60 | ||
61 | static void eqbr_gpio_mask_ack_irq(struct irq_data *d) | |
62 | { | |
63 | eqbr_gpio_disable_irq(d); | |
64 | eqbr_gpio_ack_irq(d); | |
65 | } | |
66 | ||
67 | static inline void eqbr_cfg_bit(void __iomem *addr, | |
68 | unsigned int offset, unsigned int set) | |
69 | { | |
70 | if (set) | |
71 | writel(readl(addr) | BIT(offset), addr); | |
72 | else | |
73 | writel(readl(addr) & ~BIT(offset), addr); | |
74 | } | |
75 | ||
76 | static int eqbr_irq_type_cfg(struct gpio_irq_type *type, | |
77 | struct eqbr_gpio_ctrl *gctrl, | |
78 | unsigned int offset) | |
79 | { | |
80 | unsigned long flags; | |
81 | ||
82 | raw_spin_lock_irqsave(&gctrl->lock, flags); | |
83 | eqbr_cfg_bit(gctrl->membase + GPIO_IRNCFG, offset, type->trig_type); | |
84 | eqbr_cfg_bit(gctrl->membase + GPIO_EXINTCR1, offset, type->trig_type); | |
85 | eqbr_cfg_bit(gctrl->membase + GPIO_EXINTCR0, offset, type->logic_type); | |
86 | raw_spin_unlock_irqrestore(&gctrl->lock, flags); | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static int eqbr_gpio_set_irq_type(struct irq_data *d, unsigned int type) | |
92 | { | |
93 | struct gpio_chip *gc = irq_data_get_irq_chip_data(d); | |
94 | struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc); | |
95 | unsigned int offset = irqd_to_hwirq(d); | |
96 | struct gpio_irq_type it; | |
97 | ||
98 | memset(&it, 0, sizeof(it)); | |
99 | ||
100 | if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_NONE) | |
101 | return 0; | |
102 | ||
103 | switch (type) { | |
104 | case IRQ_TYPE_EDGE_RISING: | |
105 | it.trig_type = GPIO_EDGE_TRIG; | |
106 | it.edge_type = GPIO_SINGLE_EDGE; | |
107 | it.logic_type = GPIO_POSITIVE_TRIG; | |
108 | break; | |
109 | ||
110 | case IRQ_TYPE_EDGE_FALLING: | |
111 | it.trig_type = GPIO_EDGE_TRIG; | |
112 | it.edge_type = GPIO_SINGLE_EDGE; | |
113 | it.logic_type = GPIO_NEGATIVE_TRIG; | |
114 | break; | |
115 | ||
116 | case IRQ_TYPE_EDGE_BOTH: | |
117 | it.trig_type = GPIO_EDGE_TRIG; | |
118 | it.edge_type = GPIO_BOTH_EDGE; | |
119 | it.logic_type = GPIO_POSITIVE_TRIG; | |
120 | break; | |
121 | ||
122 | case IRQ_TYPE_LEVEL_HIGH: | |
123 | it.trig_type = GPIO_LEVEL_TRIG; | |
124 | it.edge_type = GPIO_SINGLE_EDGE; | |
125 | it.logic_type = GPIO_POSITIVE_TRIG; | |
126 | break; | |
127 | ||
128 | case IRQ_TYPE_LEVEL_LOW: | |
129 | it.trig_type = GPIO_LEVEL_TRIG; | |
130 | it.edge_type = GPIO_SINGLE_EDGE; | |
131 | it.logic_type = GPIO_NEGATIVE_TRIG; | |
132 | break; | |
133 | ||
134 | default: | |
135 | return -EINVAL; | |
136 | } | |
137 | ||
138 | eqbr_irq_type_cfg(&it, gctrl, offset); | |
139 | if (it.trig_type == GPIO_EDGE_TRIG) | |
140 | irq_set_handler_locked(d, handle_edge_irq); | |
141 | else | |
142 | irq_set_handler_locked(d, handle_level_irq); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | static void eqbr_irq_handler(struct irq_desc *desc) | |
148 | { | |
149 | struct gpio_chip *gc = irq_desc_get_handler_data(desc); | |
150 | struct eqbr_gpio_ctrl *gctrl = gpiochip_get_data(gc); | |
151 | struct irq_chip *ic = irq_desc_get_chip(desc); | |
152 | unsigned long pins, offset; | |
153 | ||
154 | chained_irq_enter(ic, desc); | |
155 | pins = readl(gctrl->membase + GPIO_IRNCR); | |
156 | ||
157 | for_each_set_bit(offset, &pins, gc->ngpio) | |
158 | generic_handle_irq(irq_find_mapping(gc->irq.domain, offset)); | |
159 | ||
160 | chained_irq_exit(ic, desc); | |
161 | } | |
162 | ||
163 | static int gpiochip_setup(struct device *dev, struct eqbr_gpio_ctrl *gctrl) | |
164 | { | |
165 | struct gpio_irq_chip *girq; | |
166 | struct gpio_chip *gc; | |
167 | ||
168 | gc = &gctrl->chip; | |
169 | gc->label = gctrl->name; | |
170 | #if defined(CONFIG_OF_GPIO) | |
171 | gc->of_node = gctrl->node; | |
172 | #endif | |
173 | ||
174 | if (!of_property_read_bool(gctrl->node, "interrupt-controller")) { | |
175 | dev_dbg(dev, "gc %s: doesn't act as interrupt controller!\n", | |
176 | gctrl->name); | |
177 | return 0; | |
178 | } | |
179 | ||
180 | gctrl->ic.name = "gpio_irq"; | |
181 | gctrl->ic.irq_mask = eqbr_gpio_disable_irq; | |
182 | gctrl->ic.irq_unmask = eqbr_gpio_enable_irq; | |
183 | gctrl->ic.irq_ack = eqbr_gpio_ack_irq; | |
184 | gctrl->ic.irq_mask_ack = eqbr_gpio_mask_ack_irq; | |
185 | gctrl->ic.irq_set_type = eqbr_gpio_set_irq_type; | |
186 | ||
187 | girq = &gctrl->chip.irq; | |
188 | girq->chip = &gctrl->ic; | |
189 | girq->parent_handler = eqbr_irq_handler; | |
190 | girq->num_parents = 1; | |
191 | girq->parents = devm_kcalloc(dev, 1, sizeof(*girq->parents), GFP_KERNEL); | |
192 | if (!girq->parents) | |
193 | return -ENOMEM; | |
194 | ||
195 | girq->default_type = IRQ_TYPE_NONE; | |
196 | girq->handler = handle_bad_irq; | |
197 | girq->parents[0] = gctrl->virq; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static int gpiolib_reg(struct eqbr_pinctrl_drv_data *drvdata) | |
203 | { | |
204 | struct device *dev = drvdata->dev; | |
205 | struct eqbr_gpio_ctrl *gctrl; | |
206 | struct device_node *np; | |
207 | struct resource res; | |
208 | int i, ret; | |
209 | ||
210 | for (i = 0; i < drvdata->nr_gpio_ctrls; i++) { | |
211 | gctrl = drvdata->gpio_ctrls + i; | |
212 | np = gctrl->node; | |
213 | ||
214 | gctrl->name = devm_kasprintf(dev, GFP_KERNEL, "gpiochip%d", i); | |
215 | if (!gctrl->name) | |
216 | return -ENOMEM; | |
217 | ||
218 | if (of_address_to_resource(np, 0, &res)) { | |
219 | dev_err(dev, "Failed to get GPIO register address\n"); | |
220 | return -ENXIO; | |
221 | } | |
222 | ||
223 | gctrl->membase = devm_ioremap_resource(dev, &res); | |
224 | if (IS_ERR(gctrl->membase)) | |
225 | return PTR_ERR(gctrl->membase); | |
226 | ||
227 | gctrl->virq = irq_of_parse_and_map(np, 0); | |
228 | if (!gctrl->virq) { | |
229 | dev_err(dev, "%s: failed to parse and map irq\n", | |
230 | gctrl->name); | |
231 | return -ENXIO; | |
232 | } | |
233 | raw_spin_lock_init(&gctrl->lock); | |
234 | ||
235 | ret = bgpio_init(&gctrl->chip, dev, gctrl->bank->nr_pins / 8, | |
236 | gctrl->membase + GPIO_IN, | |
237 | gctrl->membase + GPIO_OUTSET, | |
238 | gctrl->membase + GPIO_OUTCLR, | |
239 | gctrl->membase + GPIO_DIR, | |
240 | NULL, 0); | |
241 | if (ret) { | |
242 | dev_err(dev, "unable to init generic GPIO\n"); | |
243 | return ret; | |
244 | } | |
245 | ||
246 | ret = gpiochip_setup(dev, gctrl); | |
247 | if (ret) | |
248 | return ret; | |
249 | ||
250 | ret = devm_gpiochip_add_data(dev, &gctrl->chip, gctrl); | |
251 | if (ret) | |
252 | return ret; | |
253 | } | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static inline struct eqbr_pin_bank | |
259 | *find_pinbank_via_pin(struct eqbr_pinctrl_drv_data *pctl, unsigned int pin) | |
260 | { | |
261 | struct eqbr_pin_bank *bank; | |
262 | int i; | |
263 | ||
264 | for (i = 0; i < pctl->nr_banks; i++) { | |
265 | bank = &pctl->pin_banks[i]; | |
266 | if (pin >= bank->pin_base && | |
267 | (pin - bank->pin_base) < bank->nr_pins) | |
268 | return bank; | |
269 | } | |
270 | ||
271 | return NULL; | |
272 | } | |
273 | ||
274 | static const struct pinctrl_ops eqbr_pctl_ops = { | |
275 | .get_groups_count = pinctrl_generic_get_group_count, | |
276 | .get_group_name = pinctrl_generic_get_group_name, | |
277 | .get_group_pins = pinctrl_generic_get_group_pins, | |
278 | .dt_node_to_map = pinconf_generic_dt_node_to_map_all, | |
279 | .dt_free_map = pinconf_generic_dt_free_map, | |
280 | }; | |
281 | ||
282 | static int eqbr_set_pin_mux(struct eqbr_pinctrl_drv_data *pctl, | |
283 | unsigned int pmx, unsigned int pin) | |
284 | { | |
285 | struct eqbr_pin_bank *bank; | |
286 | unsigned long flags; | |
287 | unsigned int offset; | |
288 | void __iomem *mem; | |
289 | ||
290 | bank = find_pinbank_via_pin(pctl, pin); | |
291 | if (!bank) { | |
292 | dev_err(pctl->dev, "Couldn't find pin bank for pin %u\n", pin); | |
293 | return -ENODEV; | |
294 | } | |
295 | mem = bank->membase; | |
296 | offset = pin - bank->pin_base; | |
297 | ||
298 | if (!(bank->aval_pinmap & BIT(offset))) { | |
299 | dev_err(pctl->dev, | |
300 | "PIN: %u is not valid, pinbase: %u, bitmap: %u\n", | |
301 | pin, bank->pin_base, bank->aval_pinmap); | |
302 | return -ENODEV; | |
303 | } | |
304 | ||
305 | raw_spin_lock_irqsave(&pctl->lock, flags); | |
306 | writel(pmx, mem + (offset * 4)); | |
307 | raw_spin_unlock_irqrestore(&pctl->lock, flags); | |
308 | return 0; | |
309 | } | |
310 | ||
311 | static int eqbr_pinmux_set_mux(struct pinctrl_dev *pctldev, | |
312 | unsigned int selector, unsigned int group) | |
313 | { | |
314 | struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev); | |
315 | struct function_desc *func; | |
316 | struct group_desc *grp; | |
317 | unsigned int *pinmux; | |
318 | int i; | |
319 | ||
320 | func = pinmux_generic_get_function(pctldev, selector); | |
321 | if (!func) | |
322 | return -EINVAL; | |
323 | ||
324 | grp = pinctrl_generic_get_group(pctldev, group); | |
325 | if (!grp) | |
326 | return -EINVAL; | |
327 | ||
328 | pinmux = grp->data; | |
329 | for (i = 0; i < grp->num_pins; i++) | |
330 | eqbr_set_pin_mux(pctl, pinmux[i], grp->pins[i]); | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | static int eqbr_pinmux_gpio_request(struct pinctrl_dev *pctldev, | |
336 | struct pinctrl_gpio_range *range, | |
337 | unsigned int pin) | |
338 | { | |
339 | struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev); | |
340 | ||
341 | return eqbr_set_pin_mux(pctl, EQBR_GPIO_MODE, pin); | |
342 | } | |
343 | ||
344 | static const struct pinmux_ops eqbr_pinmux_ops = { | |
345 | .get_functions_count = pinmux_generic_get_function_count, | |
346 | .get_function_name = pinmux_generic_get_function_name, | |
347 | .get_function_groups = pinmux_generic_get_function_groups, | |
348 | .set_mux = eqbr_pinmux_set_mux, | |
349 | .gpio_request_enable = eqbr_pinmux_gpio_request, | |
350 | .strict = true, | |
351 | }; | |
352 | ||
353 | static int get_drv_cur(void __iomem *mem, unsigned int offset) | |
354 | { | |
355 | unsigned int idx = offset / DRV_CUR_PINS; /* 0-15, 16-31 per register*/ | |
356 | unsigned int pin_offset = offset % DRV_CUR_PINS; | |
357 | ||
358 | return PARSE_DRV_CURRENT(readl(mem + REG_DRCC(idx)), pin_offset); | |
359 | } | |
360 | ||
361 | static struct eqbr_gpio_ctrl | |
362 | *get_gpio_ctrls_via_bank(struct eqbr_pinctrl_drv_data *pctl, | |
363 | struct eqbr_pin_bank *bank) | |
364 | { | |
365 | int i; | |
366 | ||
367 | for (i = 0; i < pctl->nr_gpio_ctrls; i++) { | |
368 | if (pctl->gpio_ctrls[i].bank == bank) | |
369 | return &pctl->gpio_ctrls[i]; | |
370 | } | |
371 | ||
372 | return NULL; | |
373 | } | |
374 | ||
375 | static int eqbr_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, | |
376 | unsigned long *config) | |
377 | { | |
378 | struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev); | |
379 | enum pin_config_param param = pinconf_to_config_param(*config); | |
380 | struct eqbr_gpio_ctrl *gctrl; | |
381 | struct eqbr_pin_bank *bank; | |
382 | unsigned long flags; | |
383 | unsigned int offset; | |
384 | void __iomem *mem; | |
385 | u32 val; | |
386 | ||
387 | bank = find_pinbank_via_pin(pctl, pin); | |
388 | if (!bank) { | |
389 | dev_err(pctl->dev, "Couldn't find pin bank for pin %u\n", pin); | |
390 | return -ENODEV; | |
391 | } | |
392 | mem = bank->membase; | |
393 | offset = pin - bank->pin_base; | |
394 | ||
395 | if (!(bank->aval_pinmap & BIT(offset))) { | |
396 | dev_err(pctl->dev, | |
397 | "PIN: %u is not valid, pinbase: %u, bitmap: %u\n", | |
398 | pin, bank->pin_base, bank->aval_pinmap); | |
399 | return -ENODEV; | |
400 | } | |
401 | ||
402 | raw_spin_lock_irqsave(&pctl->lock, flags); | |
403 | switch (param) { | |
404 | case PIN_CONFIG_BIAS_PULL_UP: | |
405 | val = !!(readl(mem + REG_PUEN) & BIT(offset)); | |
406 | break; | |
407 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
408 | val = !!(readl(mem + REG_PDEN) & BIT(offset)); | |
409 | break; | |
410 | case PIN_CONFIG_DRIVE_OPEN_DRAIN: | |
411 | val = !!(readl(mem + REG_OD) & BIT(offset)); | |
412 | break; | |
413 | case PIN_CONFIG_DRIVE_STRENGTH: | |
414 | val = get_drv_cur(mem, offset); | |
415 | break; | |
416 | case PIN_CONFIG_SLEW_RATE: | |
417 | val = !!(readl(mem + REG_SRC) & BIT(offset)); | |
418 | break; | |
419 | case PIN_CONFIG_OUTPUT_ENABLE: | |
420 | gctrl = get_gpio_ctrls_via_bank(pctl, bank); | |
421 | if (!gctrl) { | |
422 | dev_err(pctl->dev, "Failed to find gpio via bank pinbase: %u, pin: %u\n", | |
423 | bank->pin_base, pin); | |
424 | raw_spin_unlock_irqrestore(&pctl->lock, flags); | |
425 | return -ENODEV; | |
426 | } | |
427 | val = !!(readl(gctrl->membase + GPIO_DIR) & BIT(offset)); | |
428 | break; | |
429 | default: | |
430 | raw_spin_unlock_irqrestore(&pctl->lock, flags); | |
431 | return -ENOTSUPP; | |
432 | } | |
433 | raw_spin_unlock_irqrestore(&pctl->lock, flags); | |
434 | *config = pinconf_to_config_packed(param, val); | |
435 | ; | |
436 | return 0; | |
437 | } | |
438 | ||
439 | static int eqbr_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, | |
440 | unsigned long *configs, unsigned int num_configs) | |
441 | { | |
442 | struct eqbr_pinctrl_drv_data *pctl = pinctrl_dev_get_drvdata(pctldev); | |
443 | struct eqbr_gpio_ctrl *gctrl; | |
444 | enum pin_config_param param; | |
445 | struct eqbr_pin_bank *bank; | |
446 | unsigned int val, offset; | |
447 | struct gpio_chip *gc; | |
448 | unsigned long flags; | |
449 | void __iomem *mem; | |
450 | u32 regval, mask; | |
451 | int i; | |
452 | ||
453 | for (i = 0; i < num_configs; i++) { | |
454 | param = pinconf_to_config_param(configs[i]); | |
455 | val = pinconf_to_config_argument(configs[i]); | |
456 | ||
457 | bank = find_pinbank_via_pin(pctl, pin); | |
458 | if (!bank) { | |
459 | dev_err(pctl->dev, | |
460 | "Couldn't find pin bank for pin %u\n", pin); | |
461 | return -ENODEV; | |
462 | } | |
463 | mem = bank->membase; | |
464 | offset = pin - bank->pin_base; | |
465 | ||
466 | switch (param) { | |
467 | case PIN_CONFIG_BIAS_PULL_UP: | |
468 | mem += REG_PUEN; | |
469 | mask = BIT(offset); | |
470 | break; | |
471 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
472 | mem += REG_PDEN; | |
473 | mask = BIT(offset); | |
474 | break; | |
475 | case PIN_CONFIG_DRIVE_OPEN_DRAIN: | |
476 | mem += REG_OD; | |
477 | mask = BIT(offset); | |
478 | break; | |
479 | case PIN_CONFIG_DRIVE_STRENGTH: | |
480 | mem += REG_DRCC(offset / DRV_CUR_PINS); | |
481 | offset = (offset % DRV_CUR_PINS) * 2; | |
482 | mask = GENMASK(1, 0) << offset; | |
483 | break; | |
484 | case PIN_CONFIG_SLEW_RATE: | |
485 | mem += REG_SRC; | |
486 | mask = BIT(offset); | |
487 | break; | |
488 | case PIN_CONFIG_OUTPUT_ENABLE: | |
489 | gctrl = get_gpio_ctrls_via_bank(pctl, bank); | |
490 | if (!gctrl) { | |
491 | dev_err(pctl->dev, "Failed to find gpio via bank pinbase: %u, pin: %u\n", | |
492 | bank->pin_base, pin); | |
493 | return -ENODEV; | |
494 | } | |
495 | gc = &gctrl->chip; | |
496 | gc->direction_output(gc, offset, 0); | |
497 | continue; | |
498 | default: | |
499 | return -ENOTSUPP; | |
500 | } | |
501 | ||
502 | raw_spin_lock_irqsave(&pctl->lock, flags); | |
503 | regval = readl(mem); | |
504 | regval = (regval & ~mask) | ((val << offset) & mask); | |
505 | writel(regval, mem); | |
506 | raw_spin_unlock_irqrestore(&pctl->lock, flags); | |
507 | } | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | static int eqbr_pinconf_group_get(struct pinctrl_dev *pctldev, | |
513 | unsigned int group, unsigned long *config) | |
514 | { | |
515 | unsigned int i, npins, old = 0; | |
516 | const unsigned int *pins; | |
517 | int ret; | |
518 | ||
519 | ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins); | |
520 | if (ret) | |
521 | return ret; | |
522 | ||
523 | for (i = 0; i < npins; i++) { | |
524 | if (eqbr_pinconf_get(pctldev, pins[i], config)) | |
525 | return -ENOTSUPP; | |
526 | ||
527 | if (i && old != *config) | |
528 | return -ENOTSUPP; | |
529 | ||
530 | old = *config; | |
531 | } | |
532 | return 0; | |
533 | } | |
534 | ||
535 | static int eqbr_pinconf_group_set(struct pinctrl_dev *pctldev, | |
536 | unsigned int group, unsigned long *configs, | |
537 | unsigned int num_configs) | |
538 | { | |
539 | const unsigned int *pins; | |
540 | unsigned int i, npins; | |
541 | int ret; | |
542 | ||
543 | ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins); | |
544 | if (ret) | |
545 | return ret; | |
546 | ||
547 | for (i = 0; i < npins; i++) { | |
548 | ret = eqbr_pinconf_set(pctldev, pins[i], configs, num_configs); | |
549 | if (ret) | |
550 | return ret; | |
551 | } | |
552 | return 0; | |
553 | } | |
554 | ||
555 | static const struct pinconf_ops eqbr_pinconf_ops = { | |
556 | .is_generic = true, | |
557 | .pin_config_get = eqbr_pinconf_get, | |
558 | .pin_config_set = eqbr_pinconf_set, | |
559 | .pin_config_group_get = eqbr_pinconf_group_get, | |
560 | .pin_config_group_set = eqbr_pinconf_group_set, | |
561 | .pin_config_config_dbg_show = pinconf_generic_dump_config, | |
562 | }; | |
563 | ||
564 | static bool is_func_exist(struct eqbr_pmx_func *funcs, const char *name, | |
565 | unsigned int nr_funcs, unsigned int *idx) | |
566 | { | |
567 | int i; | |
568 | ||
569 | if (!funcs) | |
570 | return false; | |
571 | ||
572 | for (i = 0; i < nr_funcs; i++) { | |
573 | if (funcs[i].name && !strcmp(funcs[i].name, name)) { | |
574 | *idx = i; | |
575 | return true; | |
576 | } | |
577 | } | |
578 | ||
579 | return false; | |
580 | } | |
581 | ||
582 | static int funcs_utils(struct device *dev, struct eqbr_pmx_func *funcs, | |
583 | unsigned int *nr_funcs, funcs_util_ops op) | |
584 | { | |
585 | struct device_node *node = dev->of_node; | |
586 | struct device_node *np; | |
587 | struct property *prop; | |
588 | const char *fn_name; | |
589 | unsigned int fid; | |
590 | int i, j; | |
591 | ||
592 | i = 0; | |
593 | for_each_child_of_node(node, np) { | |
594 | prop = of_find_property(np, "groups", NULL); | |
595 | if (!prop) | |
596 | continue; | |
597 | ||
598 | if (of_property_read_string(np, "function", &fn_name)) { | |
599 | /* some groups may not have function, it's OK */ | |
600 | dev_dbg(dev, "Group %s: not function binded!\n", | |
601 | (char *)prop->value); | |
602 | continue; | |
603 | } | |
604 | ||
605 | switch (op) { | |
606 | case OP_COUNT_NR_FUNCS: | |
607 | if (!is_func_exist(funcs, fn_name, *nr_funcs, &fid)) | |
608 | *nr_funcs = *nr_funcs + 1; | |
609 | break; | |
610 | ||
611 | case OP_ADD_FUNCS: | |
612 | if (!is_func_exist(funcs, fn_name, *nr_funcs, &fid)) | |
613 | funcs[i].name = fn_name; | |
614 | break; | |
615 | ||
616 | case OP_COUNT_NR_FUNC_GRPS: | |
617 | if (is_func_exist(funcs, fn_name, *nr_funcs, &fid)) | |
618 | funcs[fid].nr_groups++; | |
619 | break; | |
620 | ||
621 | case OP_ADD_FUNC_GRPS: | |
622 | if (is_func_exist(funcs, fn_name, *nr_funcs, &fid)) { | |
623 | for (j = 0; j < funcs[fid].nr_groups; j++) | |
624 | if (!funcs[fid].groups[j]) | |
625 | break; | |
626 | funcs[fid].groups[j] = prop->value; | |
627 | } | |
628 | break; | |
629 | ||
630 | default: | |
ba434267 JY |
631 | of_node_put(np); |
632 | return -EINVAL; | |
1948d5c5 RT |
633 | } |
634 | i++; | |
635 | } | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
640 | static int eqbr_build_functions(struct eqbr_pinctrl_drv_data *drvdata) | |
641 | { | |
642 | struct device *dev = drvdata->dev; | |
643 | struct eqbr_pmx_func *funcs = NULL; | |
644 | unsigned int nr_funcs = 0; | |
645 | int i, ret; | |
646 | ||
647 | ret = funcs_utils(dev, funcs, &nr_funcs, OP_COUNT_NR_FUNCS); | |
648 | if (ret) | |
649 | return ret; | |
650 | ||
651 | funcs = devm_kcalloc(dev, nr_funcs, sizeof(*funcs), GFP_KERNEL); | |
652 | if (!funcs) | |
653 | return -ENOMEM; | |
654 | ||
655 | ret = funcs_utils(dev, funcs, &nr_funcs, OP_ADD_FUNCS); | |
656 | if (ret) | |
657 | return ret; | |
658 | ||
659 | ret = funcs_utils(dev, funcs, &nr_funcs, OP_COUNT_NR_FUNC_GRPS); | |
660 | if (ret) | |
661 | return ret; | |
662 | ||
663 | for (i = 0; i < nr_funcs; i++) { | |
664 | if (!funcs[i].nr_groups) | |
665 | continue; | |
666 | funcs[i].groups = devm_kcalloc(dev, funcs[i].nr_groups, | |
667 | sizeof(*(funcs[i].groups)), | |
668 | GFP_KERNEL); | |
669 | if (!funcs[i].groups) | |
670 | return -ENOMEM; | |
671 | } | |
672 | ||
673 | ret = funcs_utils(dev, funcs, &nr_funcs, OP_ADD_FUNC_GRPS); | |
674 | if (ret) | |
675 | return ret; | |
676 | ||
677 | for (i = 0; i < nr_funcs; i++) { | |
678 | ret = pinmux_generic_add_function(drvdata->pctl_dev, | |
679 | funcs[i].name, | |
680 | funcs[i].groups, | |
681 | funcs[i].nr_groups, | |
682 | drvdata); | |
683 | if (ret < 0) { | |
684 | dev_err(dev, "Failed to register function %s\n", | |
685 | funcs[i].name); | |
686 | return ret; | |
687 | } | |
688 | } | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
693 | static int eqbr_build_groups(struct eqbr_pinctrl_drv_data *drvdata) | |
694 | { | |
695 | struct device *dev = drvdata->dev; | |
696 | struct device_node *node = dev->of_node; | |
697 | unsigned int *pinmux, pin_id, pinmux_id; | |
698 | struct group_desc group; | |
699 | struct device_node *np; | |
700 | struct property *prop; | |
701 | int j, err; | |
702 | ||
703 | for_each_child_of_node(node, np) { | |
704 | prop = of_find_property(np, "groups", NULL); | |
705 | if (!prop) | |
706 | continue; | |
707 | ||
708 | group.num_pins = of_property_count_u32_elems(np, "pins"); | |
709 | if (group.num_pins < 0) { | |
710 | dev_err(dev, "No pins in the group: %s\n", prop->name); | |
ba434267 | 711 | of_node_put(np); |
1948d5c5 RT |
712 | return -EINVAL; |
713 | } | |
714 | group.name = prop->value; | |
715 | group.pins = devm_kcalloc(dev, group.num_pins, | |
716 | sizeof(*(group.pins)), GFP_KERNEL); | |
ba434267 JY |
717 | if (!group.pins) { |
718 | of_node_put(np); | |
1948d5c5 | 719 | return -ENOMEM; |
ba434267 | 720 | } |
1948d5c5 RT |
721 | |
722 | pinmux = devm_kcalloc(dev, group.num_pins, sizeof(*pinmux), | |
723 | GFP_KERNEL); | |
ba434267 JY |
724 | if (!pinmux) { |
725 | of_node_put(np); | |
1948d5c5 | 726 | return -ENOMEM; |
ba434267 | 727 | } |
1948d5c5 RT |
728 | |
729 | for (j = 0; j < group.num_pins; j++) { | |
730 | if (of_property_read_u32_index(np, "pins", j, &pin_id)) { | |
731 | dev_err(dev, "Group %s: Read intel pins id failed\n", | |
732 | group.name); | |
ba434267 | 733 | of_node_put(np); |
1948d5c5 RT |
734 | return -EINVAL; |
735 | } | |
736 | if (pin_id >= drvdata->pctl_desc.npins) { | |
737 | dev_err(dev, "Group %s: Invalid pin ID, idx: %d, pin %u\n", | |
738 | group.name, j, pin_id); | |
ba434267 | 739 | of_node_put(np); |
1948d5c5 RT |
740 | return -EINVAL; |
741 | } | |
742 | group.pins[j] = pin_id; | |
743 | if (of_property_read_u32_index(np, "pinmux", j, &pinmux_id)) { | |
744 | dev_err(dev, "Group %s: Read intel pinmux id failed\n", | |
745 | group.name); | |
ba434267 | 746 | of_node_put(np); |
1948d5c5 RT |
747 | return -EINVAL; |
748 | } | |
749 | pinmux[j] = pinmux_id; | |
750 | } | |
751 | ||
752 | err = pinctrl_generic_add_group(drvdata->pctl_dev, group.name, | |
753 | group.pins, group.num_pins, | |
754 | pinmux); | |
755 | if (err < 0) { | |
756 | dev_err(dev, "Failed to register group %s\n", group.name); | |
ba434267 | 757 | of_node_put(np); |
1948d5c5 RT |
758 | return err; |
759 | } | |
760 | memset(&group, 0, sizeof(group)); | |
761 | pinmux = NULL; | |
762 | } | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
767 | static int pinctrl_reg(struct eqbr_pinctrl_drv_data *drvdata) | |
768 | { | |
769 | struct pinctrl_desc *pctl_desc; | |
770 | struct pinctrl_pin_desc *pdesc; | |
771 | struct device *dev; | |
772 | unsigned int nr_pins; | |
773 | char *pin_names; | |
774 | int i, ret; | |
775 | ||
776 | dev = drvdata->dev; | |
777 | pctl_desc = &drvdata->pctl_desc; | |
778 | pctl_desc->name = "eqbr-pinctrl"; | |
779 | pctl_desc->owner = THIS_MODULE; | |
780 | pctl_desc->pctlops = &eqbr_pctl_ops; | |
781 | pctl_desc->pmxops = &eqbr_pinmux_ops; | |
782 | pctl_desc->confops = &eqbr_pinconf_ops; | |
783 | raw_spin_lock_init(&drvdata->lock); | |
784 | ||
785 | for (i = 0, nr_pins = 0; i < drvdata->nr_banks; i++) | |
786 | nr_pins += drvdata->pin_banks[i].nr_pins; | |
787 | ||
788 | pdesc = devm_kcalloc(dev, nr_pins, sizeof(*pdesc), GFP_KERNEL); | |
789 | if (!pdesc) | |
790 | return -ENOMEM; | |
791 | pin_names = devm_kcalloc(dev, nr_pins, PIN_NAME_LEN, GFP_KERNEL); | |
792 | if (!pin_names) | |
793 | return -ENOMEM; | |
794 | ||
795 | for (i = 0; i < nr_pins; i++) { | |
796 | sprintf(pin_names, PIN_NAME_FMT, i); | |
797 | pdesc[i].number = i; | |
798 | pdesc[i].name = pin_names; | |
799 | pin_names += PIN_NAME_LEN; | |
800 | } | |
801 | pctl_desc->pins = pdesc; | |
802 | pctl_desc->npins = nr_pins; | |
803 | dev_dbg(dev, "pinctrl total pin number: %u\n", nr_pins); | |
804 | ||
805 | ret = devm_pinctrl_register_and_init(dev, pctl_desc, drvdata, | |
806 | &drvdata->pctl_dev); | |
807 | if (ret) | |
808 | return ret; | |
809 | ||
810 | ret = eqbr_build_groups(drvdata); | |
811 | if (ret) { | |
812 | dev_err(dev, "Failed to build groups\n"); | |
813 | return ret; | |
814 | } | |
815 | ||
816 | ret = eqbr_build_functions(drvdata); | |
817 | if (ret) { | |
818 | dev_err(dev, "Failed to build groups\n"); | |
819 | return ret; | |
820 | } | |
821 | ||
822 | return pinctrl_enable(drvdata->pctl_dev); | |
823 | } | |
824 | ||
825 | static int pinbank_init(struct device_node *np, | |
826 | struct eqbr_pinctrl_drv_data *drvdata, | |
827 | struct eqbr_pin_bank *bank, unsigned int id) | |
828 | { | |
829 | struct device *dev = drvdata->dev; | |
830 | struct of_phandle_args spec; | |
831 | int ret; | |
832 | ||
833 | bank->membase = drvdata->membase + id * PAD_REG_OFF; | |
834 | ||
835 | ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0, &spec); | |
836 | if (ret) { | |
837 | dev_err(dev, "gpio-range not available!\n"); | |
838 | return ret; | |
839 | } | |
840 | ||
841 | bank->pin_base = spec.args[1]; | |
842 | bank->nr_pins = spec.args[2]; | |
843 | ||
844 | bank->aval_pinmap = readl(bank->membase + REG_AVAIL); | |
845 | bank->id = id; | |
846 | ||
847 | dev_dbg(dev, "pinbank id: %d, reg: %px, pinbase: %u, pin number: %u, pinmap: 0x%x\n", | |
848 | id, bank->membase, bank->pin_base, | |
849 | bank->nr_pins, bank->aval_pinmap); | |
850 | ||
851 | return ret; | |
852 | } | |
853 | ||
854 | static int pinbank_probe(struct eqbr_pinctrl_drv_data *drvdata) | |
855 | { | |
856 | struct device *dev = drvdata->dev; | |
857 | struct device_node *np_gpio; | |
858 | struct eqbr_gpio_ctrl *gctrls; | |
859 | struct eqbr_pin_bank *banks; | |
860 | int i, nr_gpio; | |
861 | ||
862 | /* Count gpio bank number */ | |
863 | nr_gpio = 0; | |
864 | for_each_node_by_name(np_gpio, "gpio") { | |
865 | if (of_device_is_available(np_gpio)) | |
866 | nr_gpio++; | |
867 | } | |
868 | ||
869 | if (!nr_gpio) { | |
870 | dev_err(dev, "NO pin bank available!\n"); | |
871 | return -ENODEV; | |
872 | } | |
873 | ||
874 | /* Count pin bank number and gpio controller number */ | |
875 | banks = devm_kcalloc(dev, nr_gpio, sizeof(*banks), GFP_KERNEL); | |
876 | if (!banks) | |
877 | return -ENOMEM; | |
878 | ||
879 | gctrls = devm_kcalloc(dev, nr_gpio, sizeof(*gctrls), GFP_KERNEL); | |
880 | if (!gctrls) | |
881 | return -ENOMEM; | |
882 | ||
883 | dev_dbg(dev, "found %d gpio controller!\n", nr_gpio); | |
884 | ||
885 | /* Initialize Pin bank */ | |
886 | i = 0; | |
887 | for_each_node_by_name(np_gpio, "gpio") { | |
888 | if (!of_device_is_available(np_gpio)) | |
889 | continue; | |
890 | ||
891 | pinbank_init(np_gpio, drvdata, banks + i, i); | |
892 | ||
893 | gctrls[i].node = np_gpio; | |
894 | gctrls[i].bank = banks + i; | |
895 | i++; | |
896 | } | |
897 | ||
898 | drvdata->pin_banks = banks; | |
899 | drvdata->nr_banks = nr_gpio; | |
900 | drvdata->gpio_ctrls = gctrls; | |
901 | drvdata->nr_gpio_ctrls = nr_gpio; | |
902 | ||
903 | return 0; | |
904 | } | |
905 | ||
906 | static int eqbr_pinctrl_probe(struct platform_device *pdev) | |
907 | { | |
908 | struct eqbr_pinctrl_drv_data *drvdata; | |
909 | struct device *dev = &pdev->dev; | |
910 | int ret; | |
911 | ||
912 | drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); | |
913 | if (!drvdata) | |
914 | return -ENOMEM; | |
915 | ||
916 | drvdata->dev = dev; | |
917 | ||
918 | drvdata->membase = devm_platform_ioremap_resource(pdev, 0); | |
919 | if (IS_ERR(drvdata->membase)) | |
920 | return PTR_ERR(drvdata->membase); | |
921 | ||
922 | ret = pinbank_probe(drvdata); | |
923 | if (ret) | |
924 | return ret; | |
925 | ||
926 | ret = pinctrl_reg(drvdata); | |
927 | if (ret) | |
928 | return ret; | |
929 | ||
930 | ret = gpiolib_reg(drvdata); | |
931 | if (ret) | |
932 | return ret; | |
933 | ||
934 | platform_set_drvdata(pdev, drvdata); | |
935 | return 0; | |
936 | } | |
937 | ||
938 | static const struct of_device_id eqbr_pinctrl_dt_match[] = { | |
939 | { .compatible = "intel,lgm-io" }, | |
940 | {} | |
941 | }; | |
942 | ||
943 | static struct platform_driver eqbr_pinctrl_driver = { | |
944 | .probe = eqbr_pinctrl_probe, | |
945 | .driver = { | |
946 | .name = "eqbr-pinctrl", | |
947 | .of_match_table = eqbr_pinctrl_dt_match, | |
948 | }, | |
949 | }; | |
950 | ||
951 | module_platform_driver(eqbr_pinctrl_driver); | |
952 | ||
953 | MODULE_AUTHOR("Zhu Yixin <yixin.zhu@intel.com>, Rahul Tanwar <rahul.tanwar@intel.com>"); | |
954 | MODULE_DESCRIPTION("Pinctrl Driver for LGM SoC (Equilibrium)"); | |
6d29032c | 955 | MODULE_LICENSE("GPL v2"); |