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0493e649 PC |
1 | /* |
2 | * Copyright (C) ST-Ericsson SA 2013 | |
3 | * | |
4 | * Author: Patrice Chotard <patrice.chotard@st.com> | |
5 | * License terms: GNU General Public License (GPL) version 2 | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/types.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/err.h> | |
f30a3839 LJ |
17 | #include <linux/of.h> |
18 | #include <linux/of_device.h> | |
0493e649 PC |
19 | #include <linux/platform_device.h> |
20 | #include <linux/gpio.h> | |
21 | #include <linux/irq.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/bitops.h> | |
24 | #include <linux/mfd/abx500.h> | |
25 | #include <linux/mfd/abx500/ab8500.h> | |
26 | #include <linux/mfd/abx500/ab8500-gpio.h> | |
27 | #include <linux/pinctrl/pinctrl.h> | |
28 | #include <linux/pinctrl/consumer.h> | |
29 | #include <linux/pinctrl/pinmux.h> | |
30 | #include <linux/pinctrl/pinconf.h> | |
31 | #include <linux/pinctrl/pinconf-generic.h> | |
32 | ||
33 | #include "pinctrl-abx500.h" | |
34 | ||
35 | /* | |
36 | * The AB9540 and AB8540 GPIO support are extended versions | |
37 | * of the AB8500 GPIO support. | |
38 | * The AB9540 supports an additional (7th) register so that | |
39 | * more GPIO may be configured and used. | |
40 | * The AB8540 supports 4 new gpios (GPIOx_VBAT) that have | |
41 | * internal pull-up and pull-down capabilities. | |
42 | */ | |
43 | ||
44 | /* | |
45 | * GPIO registers offset | |
46 | * Bank: 0x10 | |
47 | */ | |
48 | #define AB8500_GPIO_SEL1_REG 0x00 | |
49 | #define AB8500_GPIO_SEL2_REG 0x01 | |
50 | #define AB8500_GPIO_SEL3_REG 0x02 | |
51 | #define AB8500_GPIO_SEL4_REG 0x03 | |
52 | #define AB8500_GPIO_SEL5_REG 0x04 | |
53 | #define AB8500_GPIO_SEL6_REG 0x05 | |
54 | #define AB9540_GPIO_SEL7_REG 0x06 | |
55 | ||
56 | #define AB8500_GPIO_DIR1_REG 0x10 | |
57 | #define AB8500_GPIO_DIR2_REG 0x11 | |
58 | #define AB8500_GPIO_DIR3_REG 0x12 | |
59 | #define AB8500_GPIO_DIR4_REG 0x13 | |
60 | #define AB8500_GPIO_DIR5_REG 0x14 | |
61 | #define AB8500_GPIO_DIR6_REG 0x15 | |
62 | #define AB9540_GPIO_DIR7_REG 0x16 | |
63 | ||
64 | #define AB8500_GPIO_OUT1_REG 0x20 | |
65 | #define AB8500_GPIO_OUT2_REG 0x21 | |
66 | #define AB8500_GPIO_OUT3_REG 0x22 | |
67 | #define AB8500_GPIO_OUT4_REG 0x23 | |
68 | #define AB8500_GPIO_OUT5_REG 0x24 | |
69 | #define AB8500_GPIO_OUT6_REG 0x25 | |
70 | #define AB9540_GPIO_OUT7_REG 0x26 | |
71 | ||
72 | #define AB8500_GPIO_PUD1_REG 0x30 | |
73 | #define AB8500_GPIO_PUD2_REG 0x31 | |
74 | #define AB8500_GPIO_PUD3_REG 0x32 | |
75 | #define AB8500_GPIO_PUD4_REG 0x33 | |
76 | #define AB8500_GPIO_PUD5_REG 0x34 | |
77 | #define AB8500_GPIO_PUD6_REG 0x35 | |
78 | #define AB9540_GPIO_PUD7_REG 0x36 | |
79 | ||
80 | #define AB8500_GPIO_IN1_REG 0x40 | |
81 | #define AB8500_GPIO_IN2_REG 0x41 | |
82 | #define AB8500_GPIO_IN3_REG 0x42 | |
83 | #define AB8500_GPIO_IN4_REG 0x43 | |
84 | #define AB8500_GPIO_IN5_REG 0x44 | |
85 | #define AB8500_GPIO_IN6_REG 0x45 | |
86 | #define AB9540_GPIO_IN7_REG 0x46 | |
87 | #define AB8540_GPIO_VINSEL_REG 0x47 | |
88 | #define AB8540_GPIO_PULL_UPDOWN_REG 0x48 | |
89 | #define AB8500_GPIO_ALTFUN_REG 0x50 | |
90 | #define AB8500_NUM_VIR_GPIO_IRQ 16 | |
91 | #define AB8540_GPIO_PULL_UPDOWN_MASK 0x03 | |
92 | #define AB8540_GPIO_VINSEL_MASK 0x03 | |
93 | #define AB8540_GPIOX_VBAT_START 51 | |
94 | #define AB8540_GPIOX_VBAT_END 54 | |
95 | ||
96 | enum abx500_gpio_action { | |
97 | NONE, | |
98 | STARTUP, | |
99 | SHUTDOWN, | |
100 | MASK, | |
101 | UNMASK | |
102 | }; | |
103 | ||
104 | struct abx500_pinctrl { | |
105 | struct device *dev; | |
106 | struct pinctrl_dev *pctldev; | |
107 | struct abx500_pinctrl_soc_data *soc; | |
108 | struct gpio_chip chip; | |
109 | struct ab8500 *parent; | |
110 | struct mutex lock; | |
111 | u32 irq_base; | |
112 | enum abx500_gpio_action irq_action; | |
113 | u16 rising; | |
114 | u16 falling; | |
115 | struct abx500_gpio_irq_cluster *irq_cluster; | |
116 | int irq_cluster_size; | |
117 | int irq_gpio_rising_offset; | |
118 | int irq_gpio_falling_offset; | |
119 | int irq_gpio_factor; | |
120 | }; | |
121 | ||
122 | /** | |
123 | * to_abx500_pinctrl() - get the pointer to abx500_pinctrl | |
124 | * @chip: Member of the structure abx500_pinctrl | |
125 | */ | |
126 | static inline struct abx500_pinctrl *to_abx500_pinctrl(struct gpio_chip *chip) | |
127 | { | |
128 | return container_of(chip, struct abx500_pinctrl, chip); | |
129 | } | |
130 | ||
131 | static int abx500_gpio_get_bit(struct gpio_chip *chip, u8 reg, | |
83b423c8 | 132 | unsigned offset, bool *bit) |
0493e649 PC |
133 | { |
134 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
135 | u8 pos = offset % 8; | |
136 | u8 val; | |
137 | int ret; | |
138 | ||
139 | reg += offset / 8; | |
140 | ret = abx500_get_register_interruptible(pct->dev, | |
141 | AB8500_MISC, reg, &val); | |
142 | ||
143 | *bit = !!(val & BIT(pos)); | |
144 | ||
145 | if (ret < 0) | |
146 | dev_err(pct->dev, | |
147 | "%s read reg =%x, offset=%x failed\n", | |
148 | __func__, reg, offset); | |
149 | ||
150 | return ret; | |
151 | } | |
152 | ||
153 | static int abx500_gpio_set_bits(struct gpio_chip *chip, u8 reg, | |
83b423c8 | 154 | unsigned offset, int val) |
0493e649 PC |
155 | { |
156 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
157 | u8 pos = offset % 8; | |
158 | int ret; | |
159 | ||
160 | reg += offset / 8; | |
161 | ret = abx500_mask_and_set_register_interruptible(pct->dev, | |
49dcf086 | 162 | AB8500_MISC, reg, BIT(pos), val << pos); |
0493e649 PC |
163 | if (ret < 0) |
164 | dev_err(pct->dev, "%s write failed\n", __func__); | |
83b423c8 | 165 | |
0493e649 PC |
166 | return ret; |
167 | } | |
83b423c8 | 168 | |
0493e649 PC |
169 | /** |
170 | * abx500_gpio_get() - Get the particular GPIO value | |
83b423c8 LJ |
171 | * @chip: Gpio device |
172 | * @offset: GPIO number to read | |
0493e649 PC |
173 | */ |
174 | static int abx500_gpio_get(struct gpio_chip *chip, unsigned offset) | |
175 | { | |
176 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
177 | bool bit; | |
178 | int ret; | |
179 | ||
180 | ret = abx500_gpio_get_bit(chip, AB8500_GPIO_IN1_REG, | |
181 | offset, &bit); | |
182 | if (ret < 0) { | |
183 | dev_err(pct->dev, "%s failed\n", __func__); | |
184 | return ret; | |
185 | } | |
83b423c8 | 186 | |
0493e649 PC |
187 | return bit; |
188 | } | |
189 | ||
190 | static void abx500_gpio_set(struct gpio_chip *chip, unsigned offset, int val) | |
191 | { | |
192 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
193 | int ret; | |
194 | ||
195 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val); | |
196 | if (ret < 0) | |
197 | dev_err(pct->dev, "%s write failed\n", __func__); | |
198 | } | |
199 | ||
200 | static int abx500_config_pull_updown(struct abx500_pinctrl *pct, | |
83b423c8 | 201 | int offset, enum abx500_gpio_pull_updown val) |
0493e649 PC |
202 | { |
203 | u8 pos; | |
204 | int ret; | |
205 | struct pullud *pullud; | |
206 | ||
207 | if (!pct->soc->pullud) { | |
208 | dev_err(pct->dev, "%s AB chip doesn't support pull up/down feature", | |
209 | __func__); | |
210 | ret = -EPERM; | |
211 | goto out; | |
212 | } | |
213 | ||
214 | pullud = pct->soc->pullud; | |
215 | ||
216 | if ((offset < pullud->first_pin) | |
217 | || (offset > pullud->last_pin)) { | |
218 | ret = -EINVAL; | |
219 | goto out; | |
220 | } | |
221 | ||
222 | pos = offset << 1; | |
223 | ||
224 | ret = abx500_mask_and_set_register_interruptible(pct->dev, | |
225 | AB8500_MISC, AB8540_GPIO_PULL_UPDOWN_REG, | |
226 | AB8540_GPIO_PULL_UPDOWN_MASK << pos, val << pos); | |
227 | ||
228 | out: | |
229 | if (ret < 0) | |
230 | dev_err(pct->dev, "%s failed (%d)\n", __func__, ret); | |
83b423c8 | 231 | |
0493e649 PC |
232 | return ret; |
233 | } | |
234 | ||
235 | static int abx500_gpio_direction_output(struct gpio_chip *chip, | |
236 | unsigned offset, | |
237 | int val) | |
238 | { | |
239 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
240 | struct pullud *pullud = pct->soc->pullud; | |
241 | unsigned gpio; | |
242 | int ret; | |
83b423c8 | 243 | |
0493e649 PC |
244 | /* set direction as output */ |
245 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_DIR1_REG, offset, 1); | |
246 | if (ret < 0) | |
247 | return ret; | |
248 | ||
249 | /* disable pull down */ | |
250 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_PUD1_REG, offset, 1); | |
251 | if (ret < 0) | |
252 | return ret; | |
253 | ||
254 | /* if supported, disable both pull down and pull up */ | |
255 | gpio = offset + 1; | |
256 | if (pullud && gpio >= pullud->first_pin && gpio <= pullud->last_pin) { | |
257 | ret = abx500_config_pull_updown(pct, | |
258 | gpio, | |
259 | ABX500_GPIO_PULL_NONE); | |
260 | if (ret < 0) | |
261 | return ret; | |
262 | } | |
83b423c8 | 263 | |
0493e649 PC |
264 | /* set the output as 1 or 0 */ |
265 | return abx500_gpio_set_bits(chip, AB8500_GPIO_OUT1_REG, offset, val); | |
266 | } | |
267 | ||
268 | static int abx500_gpio_direction_input(struct gpio_chip *chip, unsigned offset) | |
269 | { | |
270 | /* set the register as input */ | |
271 | return abx500_gpio_set_bits(chip, AB8500_GPIO_DIR1_REG, offset, 0); | |
272 | } | |
273 | ||
274 | static int abx500_gpio_to_irq(struct gpio_chip *chip, unsigned offset) | |
275 | { | |
276 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
b9fab6e4 LJ |
277 | /* The AB8500 GPIO numbers are off by one */ |
278 | int gpio = offset + 1; | |
0493e649 PC |
279 | int base = pct->irq_base; |
280 | int i; | |
281 | ||
282 | for (i = 0; i < pct->irq_cluster_size; i++) { | |
283 | struct abx500_gpio_irq_cluster *cluster = | |
284 | &pct->irq_cluster[i]; | |
285 | ||
b9fab6e4 LJ |
286 | if (gpio >= cluster->start && gpio <= cluster->end) |
287 | return base + gpio - cluster->start; | |
0493e649 PC |
288 | |
289 | /* Advance by the number of gpios in this cluster */ | |
290 | base += cluster->end + cluster->offset - cluster->start + 1; | |
291 | } | |
292 | ||
293 | return -EINVAL; | |
294 | } | |
295 | ||
296 | static int abx500_set_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip, | |
83b423c8 | 297 | unsigned gpio, int alt_setting) |
0493e649 PC |
298 | { |
299 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
300 | struct alternate_functions af = pct->soc->alternate_functions[gpio]; | |
301 | int ret; | |
302 | int val; | |
303 | unsigned offset; | |
83b423c8 | 304 | |
0493e649 PC |
305 | const char *modes[] = { |
306 | [ABX500_DEFAULT] = "default", | |
307 | [ABX500_ALT_A] = "altA", | |
308 | [ABX500_ALT_B] = "altB", | |
309 | [ABX500_ALT_C] = "altC", | |
310 | }; | |
311 | ||
312 | /* sanity check */ | |
313 | if (((alt_setting == ABX500_ALT_A) && (af.gpiosel_bit == UNUSED)) || | |
314 | ((alt_setting == ABX500_ALT_B) && (af.alt_bit1 == UNUSED)) || | |
315 | ((alt_setting == ABX500_ALT_C) && (af.alt_bit2 == UNUSED))) { | |
316 | dev_dbg(pct->dev, "pin %d doesn't support %s mode\n", gpio, | |
317 | modes[alt_setting]); | |
318 | return -EINVAL; | |
319 | } | |
320 | ||
321 | /* on ABx5xx, there is no GPIO0, so adjust the offset */ | |
322 | offset = gpio - 1; | |
83b423c8 | 323 | |
0493e649 PC |
324 | switch (alt_setting) { |
325 | case ABX500_DEFAULT: | |
326 | /* | |
327 | * for ABx5xx family, default mode is always selected by | |
328 | * writing 0 to GPIOSELx register, except for pins which | |
329 | * support at least ALT_B mode, default mode is selected | |
330 | * by writing 1 to GPIOSELx register | |
331 | */ | |
332 | val = 0; | |
333 | if (af.alt_bit1 != UNUSED) | |
334 | val++; | |
335 | ||
336 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, | |
337 | offset, val); | |
338 | break; | |
83b423c8 | 339 | |
0493e649 PC |
340 | case ABX500_ALT_A: |
341 | /* | |
342 | * for ABx5xx family, alt_a mode is always selected by | |
343 | * writing 1 to GPIOSELx register, except for pins which | |
344 | * support at least ALT_B mode, alt_a mode is selected | |
345 | * by writing 0 to GPIOSELx register and 0 in ALTFUNC | |
346 | * register | |
347 | */ | |
348 | if (af.alt_bit1 != UNUSED) { | |
349 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, | |
350 | offset, 0); | |
351 | ret = abx500_gpio_set_bits(chip, | |
352 | AB8500_GPIO_ALTFUN_REG, | |
353 | af.alt_bit1, | |
354 | !!(af.alta_val && BIT(0))); | |
355 | if (af.alt_bit2 != UNUSED) | |
356 | ret = abx500_gpio_set_bits(chip, | |
357 | AB8500_GPIO_ALTFUN_REG, | |
358 | af.alt_bit2, | |
359 | !!(af.alta_val && BIT(1))); | |
360 | } else | |
361 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, | |
362 | offset, 1); | |
363 | break; | |
83b423c8 | 364 | |
0493e649 PC |
365 | case ABX500_ALT_B: |
366 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, | |
367 | offset, 0); | |
368 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG, | |
369 | af.alt_bit1, !!(af.altb_val && BIT(0))); | |
370 | if (af.alt_bit2 != UNUSED) | |
371 | ret = abx500_gpio_set_bits(chip, | |
372 | AB8500_GPIO_ALTFUN_REG, | |
373 | af.alt_bit2, | |
374 | !!(af.altb_val && BIT(1))); | |
375 | break; | |
83b423c8 | 376 | |
0493e649 PC |
377 | case ABX500_ALT_C: |
378 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_SEL1_REG, | |
379 | offset, 0); | |
380 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG, | |
381 | af.alt_bit2, !!(af.altc_val && BIT(0))); | |
382 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_ALTFUN_REG, | |
383 | af.alt_bit2, !!(af.altc_val && BIT(1))); | |
384 | break; | |
385 | ||
386 | default: | |
387 | dev_dbg(pct->dev, "unknow alt_setting %d\n", alt_setting); | |
83b423c8 | 388 | |
0493e649 PC |
389 | return -EINVAL; |
390 | } | |
83b423c8 | 391 | |
0493e649 PC |
392 | return ret; |
393 | } | |
394 | ||
395 | static u8 abx500_get_mode(struct pinctrl_dev *pctldev, struct gpio_chip *chip, | |
83b423c8 | 396 | unsigned gpio) |
0493e649 PC |
397 | { |
398 | u8 mode; | |
399 | bool bit_mode; | |
400 | bool alt_bit1; | |
401 | bool alt_bit2; | |
402 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
403 | struct alternate_functions af = pct->soc->alternate_functions[gpio]; | |
a950cb74 LW |
404 | /* on ABx5xx, there is no GPIO0, so adjust the offset */ |
405 | unsigned offset = gpio - 1; | |
0493e649 PC |
406 | |
407 | /* | |
408 | * if gpiosel_bit is set to unused, | |
409 | * it means no GPIO or special case | |
410 | */ | |
411 | if (af.gpiosel_bit == UNUSED) | |
412 | return ABX500_DEFAULT; | |
413 | ||
414 | /* read GpioSelx register */ | |
a950cb74 | 415 | abx500_gpio_get_bit(chip, AB8500_GPIO_SEL1_REG + (offset / 8), |
0493e649 PC |
416 | af.gpiosel_bit, &bit_mode); |
417 | mode = bit_mode; | |
418 | ||
419 | /* sanity check */ | |
420 | if ((af.alt_bit1 < UNUSED) || (af.alt_bit1 > 7) || | |
421 | (af.alt_bit2 < UNUSED) || (af.alt_bit2 > 7)) { | |
422 | dev_err(pct->dev, | |
423 | "alt_bitX value not in correct range (-1 to 7)\n"); | |
424 | return -EINVAL; | |
425 | } | |
83b423c8 | 426 | |
0493e649 PC |
427 | /* if alt_bit2 is used, alt_bit1 must be used too */ |
428 | if ((af.alt_bit2 != UNUSED) && (af.alt_bit1 == UNUSED)) { | |
429 | dev_err(pct->dev, | |
430 | "if alt_bit2 is used, alt_bit1 can't be unused\n"); | |
431 | return -EINVAL; | |
432 | } | |
433 | ||
434 | /* check if pin use AlternateFunction register */ | |
435 | if ((af.alt_bit1 == UNUSED) && (af.alt_bit1 == UNUSED)) | |
436 | return mode; | |
437 | /* | |
438 | * if pin GPIOSEL bit is set and pin supports alternate function, | |
439 | * it means DEFAULT mode | |
440 | */ | |
441 | if (mode) | |
442 | return ABX500_DEFAULT; | |
83b423c8 | 443 | |
0493e649 PC |
444 | /* |
445 | * pin use the AlternatFunction register | |
446 | * read alt_bit1 value | |
447 | */ | |
448 | abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG, | |
449 | af.alt_bit1, &alt_bit1); | |
450 | ||
451 | if (af.alt_bit2 != UNUSED) | |
452 | /* read alt_bit2 value */ | |
453 | abx500_gpio_get_bit(chip, AB8500_GPIO_ALTFUN_REG, af.alt_bit2, | |
454 | &alt_bit2); | |
455 | else | |
456 | alt_bit2 = 0; | |
457 | ||
458 | mode = (alt_bit2 << 1) + alt_bit1; | |
459 | if (mode == af.alta_val) | |
460 | return ABX500_ALT_A; | |
461 | else if (mode == af.altb_val) | |
462 | return ABX500_ALT_B; | |
463 | else | |
464 | return ABX500_ALT_C; | |
465 | } | |
466 | ||
467 | #ifdef CONFIG_DEBUG_FS | |
468 | ||
469 | #include <linux/seq_file.h> | |
470 | ||
471 | static void abx500_gpio_dbg_show_one(struct seq_file *s, | |
83b423c8 LJ |
472 | struct pinctrl_dev *pctldev, |
473 | struct gpio_chip *chip, | |
474 | unsigned offset, unsigned gpio) | |
0493e649 PC |
475 | { |
476 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
477 | const char *label = gpiochip_is_requested(chip, offset - 1); | |
478 | u8 gpio_offset = offset - 1; | |
479 | int mode = -1; | |
480 | bool is_out; | |
481 | bool pull; | |
83b423c8 | 482 | |
0493e649 PC |
483 | const char *modes[] = { |
484 | [ABX500_DEFAULT] = "default", | |
485 | [ABX500_ALT_A] = "altA", | |
486 | [ABX500_ALT_B] = "altB", | |
487 | [ABX500_ALT_C] = "altC", | |
488 | }; | |
489 | ||
490 | abx500_gpio_get_bit(chip, AB8500_GPIO_DIR1_REG, gpio_offset, &is_out); | |
491 | abx500_gpio_get_bit(chip, AB8500_GPIO_PUD1_REG, gpio_offset, &pull); | |
492 | ||
493 | if (pctldev) | |
494 | mode = abx500_get_mode(pctldev, chip, offset); | |
495 | ||
496 | seq_printf(s, " gpio-%-3d (%-20.20s) %-3s %-9s %s", | |
497 | gpio, label ?: "(none)", | |
498 | is_out ? "out" : "in ", | |
499 | is_out ? | |
500 | (chip->get | |
501 | ? (chip->get(chip, offset) ? "hi" : "lo") | |
502 | : "? ") | |
503 | : (pull ? "pull up" : "pull down"), | |
504 | (mode < 0) ? "unknown" : modes[mode]); | |
505 | ||
506 | if (label && !is_out) { | |
507 | int irq = gpio_to_irq(gpio); | |
508 | struct irq_desc *desc = irq_to_desc(irq); | |
509 | ||
510 | if (irq >= 0 && desc->action) { | |
511 | char *trigger; | |
512 | int irq_offset = irq - pct->irq_base; | |
513 | ||
514 | if (pct->rising & BIT(irq_offset)) | |
515 | trigger = "edge-rising"; | |
516 | else if (pct->falling & BIT(irq_offset)) | |
517 | trigger = "edge-falling"; | |
518 | else | |
519 | trigger = "edge-undefined"; | |
520 | ||
521 | seq_printf(s, " irq-%d %s", irq, trigger); | |
522 | } | |
523 | } | |
524 | } | |
525 | ||
526 | static void abx500_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) | |
527 | { | |
528 | unsigned i; | |
529 | unsigned gpio = chip->base; | |
530 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
531 | struct pinctrl_dev *pctldev = pct->pctldev; | |
532 | ||
533 | for (i = 0; i < chip->ngpio; i++, gpio++) { | |
534 | /* On AB8500, there is no GPIO0, the first is the GPIO 1 */ | |
535 | abx500_gpio_dbg_show_one(s, pctldev, chip, i + 1, gpio); | |
536 | seq_printf(s, "\n"); | |
537 | } | |
538 | } | |
539 | ||
540 | #else | |
541 | static inline void abx500_gpio_dbg_show_one(struct seq_file *s, | |
83b423c8 LJ |
542 | struct pinctrl_dev *pctldev, |
543 | struct gpio_chip *chip, | |
544 | unsigned offset, unsigned gpio) | |
0493e649 PC |
545 | { |
546 | } | |
547 | #define abx500_gpio_dbg_show NULL | |
548 | #endif | |
549 | ||
550 | int abx500_gpio_request(struct gpio_chip *chip, unsigned offset) | |
551 | { | |
552 | int gpio = chip->base + offset; | |
553 | ||
554 | return pinctrl_request_gpio(gpio); | |
555 | } | |
556 | ||
557 | void abx500_gpio_free(struct gpio_chip *chip, unsigned offset) | |
558 | { | |
559 | int gpio = chip->base + offset; | |
560 | ||
561 | pinctrl_free_gpio(gpio); | |
562 | } | |
563 | ||
564 | static struct gpio_chip abx500gpio_chip = { | |
565 | .label = "abx500-gpio", | |
566 | .owner = THIS_MODULE, | |
567 | .request = abx500_gpio_request, | |
568 | .free = abx500_gpio_free, | |
569 | .direction_input = abx500_gpio_direction_input, | |
570 | .get = abx500_gpio_get, | |
571 | .direction_output = abx500_gpio_direction_output, | |
572 | .set = abx500_gpio_set, | |
573 | .to_irq = abx500_gpio_to_irq, | |
574 | .dbg_show = abx500_gpio_dbg_show, | |
575 | }; | |
576 | ||
577 | static unsigned int irq_to_rising(unsigned int irq) | |
578 | { | |
579 | struct abx500_pinctrl *pct = irq_get_chip_data(irq); | |
580 | int offset = irq - pct->irq_base; | |
581 | int new_irq; | |
582 | ||
583 | new_irq = offset * pct->irq_gpio_factor | |
584 | + pct->irq_gpio_rising_offset | |
585 | + pct->parent->irq_base; | |
586 | ||
587 | return new_irq; | |
588 | } | |
589 | ||
590 | static unsigned int irq_to_falling(unsigned int irq) | |
591 | { | |
592 | struct abx500_pinctrl *pct = irq_get_chip_data(irq); | |
593 | int offset = irq - pct->irq_base; | |
594 | int new_irq; | |
595 | ||
596 | new_irq = offset * pct->irq_gpio_factor | |
597 | + pct->irq_gpio_falling_offset | |
598 | + pct->parent->irq_base; | |
599 | return new_irq; | |
600 | ||
601 | } | |
602 | ||
603 | static unsigned int rising_to_irq(unsigned int irq, void *dev) | |
604 | { | |
605 | struct abx500_pinctrl *pct = dev; | |
606 | int offset, new_irq; | |
607 | ||
608 | offset = irq - pct->irq_gpio_rising_offset | |
609 | - pct->parent->irq_base; | |
610 | new_irq = (offset / pct->irq_gpio_factor) | |
611 | + pct->irq_base; | |
612 | ||
613 | return new_irq; | |
614 | } | |
615 | ||
616 | static unsigned int falling_to_irq(unsigned int irq, void *dev) | |
617 | { | |
618 | struct abx500_pinctrl *pct = dev; | |
619 | int offset, new_irq; | |
620 | ||
621 | offset = irq - pct->irq_gpio_falling_offset | |
622 | - pct->parent->irq_base; | |
623 | new_irq = (offset / pct->irq_gpio_factor) | |
624 | + pct->irq_base; | |
625 | ||
626 | return new_irq; | |
627 | } | |
628 | ||
629 | /* | |
630 | * IRQ handler | |
631 | */ | |
632 | ||
633 | static irqreturn_t handle_rising(int irq, void *dev) | |
634 | { | |
635 | ||
636 | handle_nested_irq(rising_to_irq(irq , dev)); | |
637 | return IRQ_HANDLED; | |
638 | } | |
639 | ||
640 | static irqreturn_t handle_falling(int irq, void *dev) | |
641 | { | |
642 | ||
643 | handle_nested_irq(falling_to_irq(irq, dev)); | |
644 | return IRQ_HANDLED; | |
645 | } | |
646 | ||
647 | static void abx500_gpio_irq_lock(struct irq_data *data) | |
648 | { | |
649 | struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data); | |
650 | mutex_lock(&pct->lock); | |
651 | } | |
652 | ||
653 | static void abx500_gpio_irq_sync_unlock(struct irq_data *data) | |
654 | { | |
655 | struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data); | |
656 | unsigned int irq = data->irq; | |
657 | int offset = irq - pct->irq_base; | |
658 | bool rising = pct->rising & BIT(offset); | |
659 | bool falling = pct->falling & BIT(offset); | |
660 | int ret; | |
661 | ||
662 | switch (pct->irq_action) { | |
663 | case STARTUP: | |
664 | if (rising) | |
665 | ret = request_threaded_irq(irq_to_rising(irq), | |
666 | NULL, handle_rising, | |
667 | IRQF_TRIGGER_RISING | IRQF_NO_SUSPEND, | |
668 | "abx500-gpio-r", pct); | |
669 | if (falling) | |
670 | ret = request_threaded_irq(irq_to_falling(irq), | |
671 | NULL, handle_falling, | |
672 | IRQF_TRIGGER_FALLING | IRQF_NO_SUSPEND, | |
673 | "abx500-gpio-f", pct); | |
674 | break; | |
675 | case SHUTDOWN: | |
676 | if (rising) | |
677 | free_irq(irq_to_rising(irq), pct); | |
678 | if (falling) | |
679 | free_irq(irq_to_falling(irq), pct); | |
680 | break; | |
681 | case MASK: | |
682 | if (rising) | |
683 | disable_irq(irq_to_rising(irq)); | |
684 | if (falling) | |
685 | disable_irq(irq_to_falling(irq)); | |
686 | break; | |
687 | case UNMASK: | |
688 | if (rising) | |
689 | enable_irq(irq_to_rising(irq)); | |
690 | if (falling) | |
691 | enable_irq(irq_to_falling(irq)); | |
692 | break; | |
693 | case NONE: | |
694 | break; | |
695 | } | |
696 | pct->irq_action = NONE; | |
697 | pct->rising &= ~(BIT(offset)); | |
698 | pct->falling &= ~(BIT(offset)); | |
699 | mutex_unlock(&pct->lock); | |
700 | } | |
701 | ||
702 | ||
703 | static void abx500_gpio_irq_mask(struct irq_data *data) | |
704 | { | |
705 | struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data); | |
706 | pct->irq_action = MASK; | |
707 | } | |
708 | ||
709 | static void abx500_gpio_irq_unmask(struct irq_data *data) | |
710 | { | |
711 | struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data); | |
712 | pct->irq_action = UNMASK; | |
713 | } | |
714 | ||
715 | static int abx500_gpio_irq_set_type(struct irq_data *data, unsigned int type) | |
716 | { | |
717 | struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data); | |
718 | unsigned int irq = data->irq; | |
719 | int offset = irq - pct->irq_base; | |
720 | ||
721 | if (type == IRQ_TYPE_EDGE_BOTH) { | |
722 | pct->rising = BIT(offset); | |
723 | pct->falling = BIT(offset); | |
724 | } else if (type == IRQ_TYPE_EDGE_RISING) { | |
725 | pct->rising = BIT(offset); | |
726 | } else { | |
727 | pct->falling = BIT(offset); | |
728 | } | |
729 | return 0; | |
730 | } | |
731 | ||
732 | static unsigned int abx500_gpio_irq_startup(struct irq_data *data) | |
733 | { | |
734 | struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data); | |
735 | pct->irq_action = STARTUP; | |
736 | return 0; | |
737 | } | |
738 | ||
739 | static void abx500_gpio_irq_shutdown(struct irq_data *data) | |
740 | { | |
741 | struct abx500_pinctrl *pct = irq_data_get_irq_chip_data(data); | |
742 | pct->irq_action = SHUTDOWN; | |
743 | } | |
744 | ||
745 | static struct irq_chip abx500_gpio_irq_chip = { | |
746 | .name = "abx500-gpio", | |
747 | .irq_startup = abx500_gpio_irq_startup, | |
748 | .irq_shutdown = abx500_gpio_irq_shutdown, | |
749 | .irq_bus_lock = abx500_gpio_irq_lock, | |
750 | .irq_bus_sync_unlock = abx500_gpio_irq_sync_unlock, | |
751 | .irq_mask = abx500_gpio_irq_mask, | |
752 | .irq_unmask = abx500_gpio_irq_unmask, | |
753 | .irq_set_type = abx500_gpio_irq_set_type, | |
754 | }; | |
755 | ||
756 | static int abx500_gpio_irq_init(struct abx500_pinctrl *pct) | |
757 | { | |
758 | u32 base = pct->irq_base; | |
759 | int irq; | |
760 | ||
761 | for (irq = base; irq < base + AB8500_NUM_VIR_GPIO_IRQ ; irq++) { | |
762 | irq_set_chip_data(irq, pct); | |
763 | irq_set_chip_and_handler(irq, &abx500_gpio_irq_chip, | |
764 | handle_simple_irq); | |
765 | irq_set_nested_thread(irq, 1); | |
766 | #ifdef CONFIG_ARM | |
767 | set_irq_flags(irq, IRQF_VALID); | |
768 | #else | |
769 | irq_set_noprobe(irq); | |
770 | #endif | |
771 | } | |
772 | ||
773 | return 0; | |
774 | } | |
775 | ||
776 | static void abx500_gpio_irq_remove(struct abx500_pinctrl *pct) | |
777 | { | |
778 | int base = pct->irq_base; | |
779 | int irq; | |
780 | ||
781 | for (irq = base; irq < base + AB8500_NUM_VIR_GPIO_IRQ; irq++) { | |
782 | #ifdef CONFIG_ARM | |
783 | set_irq_flags(irq, 0); | |
784 | #endif | |
785 | irq_set_chip_and_handler(irq, NULL, NULL); | |
786 | irq_set_chip_data(irq, NULL); | |
787 | } | |
788 | } | |
789 | ||
790 | static int abx500_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) | |
791 | { | |
792 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
793 | ||
794 | return pct->soc->nfunctions; | |
795 | } | |
796 | ||
797 | static const char *abx500_pmx_get_func_name(struct pinctrl_dev *pctldev, | |
798 | unsigned function) | |
799 | { | |
800 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
801 | ||
802 | return pct->soc->functions[function].name; | |
803 | } | |
804 | ||
805 | static int abx500_pmx_get_func_groups(struct pinctrl_dev *pctldev, | |
83b423c8 LJ |
806 | unsigned function, |
807 | const char * const **groups, | |
808 | unsigned * const num_groups) | |
0493e649 PC |
809 | { |
810 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
811 | ||
812 | *groups = pct->soc->functions[function].groups; | |
813 | *num_groups = pct->soc->functions[function].ngroups; | |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
818 | static void abx500_disable_lazy_irq(struct gpio_chip *chip, unsigned gpio) | |
819 | { | |
820 | struct abx500_pinctrl *pct = to_abx500_pinctrl(chip); | |
821 | int irq; | |
822 | int offset; | |
823 | bool rising; | |
824 | bool falling; | |
825 | ||
826 | /* | |
827 | * check if gpio has interrupt capability and convert | |
828 | * gpio number to irq | |
829 | * On ABx5xx, there is no GPIO0, GPIO1 is the | |
830 | * first one, so adjust gpio number | |
831 | */ | |
832 | gpio--; | |
833 | irq = gpio_to_irq(gpio + chip->base); | |
834 | if (irq < 0) | |
835 | return; | |
836 | ||
837 | offset = irq - pct->irq_base; | |
838 | rising = pct->rising & BIT(offset); | |
839 | falling = pct->falling & BIT(offset); | |
840 | ||
841 | /* nothing to do ?*/ | |
842 | if (!rising && !falling) | |
843 | return; | |
844 | ||
845 | if (rising) { | |
846 | disable_irq(irq_to_rising(irq)); | |
847 | free_irq(irq_to_rising(irq), pct); | |
848 | } | |
849 | if (falling) { | |
850 | disable_irq(irq_to_falling(irq)); | |
851 | free_irq(irq_to_falling(irq), pct); | |
852 | } | |
853 | } | |
854 | ||
855 | static int abx500_pmx_enable(struct pinctrl_dev *pctldev, unsigned function, | |
83b423c8 | 856 | unsigned group) |
0493e649 PC |
857 | { |
858 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
859 | struct gpio_chip *chip = &pct->chip; | |
860 | const struct abx500_pingroup *g; | |
861 | int i; | |
862 | int ret = 0; | |
863 | ||
864 | g = &pct->soc->groups[group]; | |
865 | if (g->altsetting < 0) | |
866 | return -EINVAL; | |
867 | ||
868 | dev_dbg(pct->dev, "enable group %s, %u pins\n", g->name, g->npins); | |
869 | ||
870 | for (i = 0; i < g->npins; i++) { | |
871 | dev_dbg(pct->dev, "setting pin %d to altsetting %d\n", | |
872 | g->pins[i], g->altsetting); | |
873 | ||
874 | abx500_disable_lazy_irq(chip, g->pins[i]); | |
875 | ret = abx500_set_mode(pctldev, chip, g->pins[i], g->altsetting); | |
876 | } | |
83b423c8 | 877 | |
0493e649 PC |
878 | return ret; |
879 | } | |
880 | ||
881 | static void abx500_pmx_disable(struct pinctrl_dev *pctldev, | |
83b423c8 | 882 | unsigned function, unsigned group) |
0493e649 PC |
883 | { |
884 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
885 | const struct abx500_pingroup *g; | |
886 | ||
887 | g = &pct->soc->groups[group]; | |
888 | if (g->altsetting < 0) | |
889 | return; | |
890 | ||
891 | /* FIXME: poke out the mux, set the pin to some default state? */ | |
892 | dev_dbg(pct->dev, "disable group %s, %u pins\n", g->name, g->npins); | |
893 | } | |
894 | ||
895 | int abx500_gpio_request_enable(struct pinctrl_dev *pctldev, | |
83b423c8 LJ |
896 | struct pinctrl_gpio_range *range, |
897 | unsigned offset) | |
0493e649 PC |
898 | { |
899 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
900 | const struct abx500_pinrange *p; | |
901 | int ret; | |
902 | int i; | |
903 | ||
904 | /* | |
905 | * Different ranges have different ways to enable GPIO function on a | |
906 | * pin, so refer back to our local range type, where we handily define | |
907 | * what altfunc enables GPIO for a certain pin. | |
908 | */ | |
909 | for (i = 0; i < pct->soc->gpio_num_ranges; i++) { | |
910 | p = &pct->soc->gpio_ranges[i]; | |
911 | if ((offset >= p->offset) && | |
912 | (offset < (p->offset + p->npins))) | |
913 | break; | |
914 | } | |
915 | ||
916 | if (i == pct->soc->gpio_num_ranges) { | |
917 | dev_err(pct->dev, "%s failed to locate range\n", __func__); | |
918 | return -ENODEV; | |
919 | } | |
920 | ||
921 | dev_dbg(pct->dev, "enable GPIO by altfunc %d at gpio %d\n", | |
922 | p->altfunc, offset); | |
923 | ||
924 | ret = abx500_set_mode(pct->pctldev, &pct->chip, | |
925 | offset, p->altfunc); | |
926 | if (ret < 0) { | |
927 | dev_err(pct->dev, "%s setting altfunc failed\n", __func__); | |
928 | return ret; | |
929 | } | |
930 | ||
931 | return ret; | |
932 | } | |
933 | ||
934 | static void abx500_gpio_disable_free(struct pinctrl_dev *pctldev, | |
83b423c8 LJ |
935 | struct pinctrl_gpio_range *range, |
936 | unsigned offset) | |
0493e649 PC |
937 | { |
938 | } | |
939 | ||
940 | static struct pinmux_ops abx500_pinmux_ops = { | |
941 | .get_functions_count = abx500_pmx_get_funcs_cnt, | |
942 | .get_function_name = abx500_pmx_get_func_name, | |
943 | .get_function_groups = abx500_pmx_get_func_groups, | |
944 | .enable = abx500_pmx_enable, | |
945 | .disable = abx500_pmx_disable, | |
946 | .gpio_request_enable = abx500_gpio_request_enable, | |
947 | .gpio_disable_free = abx500_gpio_disable_free, | |
948 | }; | |
949 | ||
950 | static int abx500_get_groups_cnt(struct pinctrl_dev *pctldev) | |
951 | { | |
952 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
953 | ||
954 | return pct->soc->ngroups; | |
955 | } | |
956 | ||
957 | static const char *abx500_get_group_name(struct pinctrl_dev *pctldev, | |
83b423c8 | 958 | unsigned selector) |
0493e649 PC |
959 | { |
960 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
961 | ||
962 | return pct->soc->groups[selector].name; | |
963 | } | |
964 | ||
965 | static int abx500_get_group_pins(struct pinctrl_dev *pctldev, | |
83b423c8 LJ |
966 | unsigned selector, |
967 | const unsigned **pins, | |
968 | unsigned *num_pins) | |
0493e649 PC |
969 | { |
970 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
971 | ||
972 | *pins = pct->soc->groups[selector].pins; | |
973 | *num_pins = pct->soc->groups[selector].npins; | |
83b423c8 | 974 | |
0493e649 PC |
975 | return 0; |
976 | } | |
977 | ||
978 | static void abx500_pin_dbg_show(struct pinctrl_dev *pctldev, | |
83b423c8 | 979 | struct seq_file *s, unsigned offset) |
0493e649 PC |
980 | { |
981 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
982 | struct gpio_chip *chip = &pct->chip; | |
983 | ||
984 | abx500_gpio_dbg_show_one(s, pctldev, chip, offset, | |
985 | chip->base + offset - 1); | |
986 | } | |
987 | ||
988 | static struct pinctrl_ops abx500_pinctrl_ops = { | |
989 | .get_groups_count = abx500_get_groups_cnt, | |
990 | .get_group_name = abx500_get_group_name, | |
991 | .get_group_pins = abx500_get_group_pins, | |
992 | .pin_dbg_show = abx500_pin_dbg_show, | |
993 | }; | |
994 | ||
995 | int abx500_pin_config_get(struct pinctrl_dev *pctldev, | |
83b423c8 LJ |
996 | unsigned pin, |
997 | unsigned long *config) | |
0493e649 | 998 | { |
1abeebea | 999 | return -ENOSYS; |
0493e649 PC |
1000 | } |
1001 | ||
1002 | int abx500_pin_config_set(struct pinctrl_dev *pctldev, | |
83b423c8 LJ |
1003 | unsigned pin, |
1004 | unsigned long config) | |
0493e649 PC |
1005 | { |
1006 | struct abx500_pinctrl *pct = pinctrl_dev_get_drvdata(pctldev); | |
1007 | struct pullud *pullud = pct->soc->pullud; | |
1008 | struct gpio_chip *chip = &pct->chip; | |
1009 | unsigned offset; | |
1010 | int ret; | |
1011 | enum pin_config_param param = pinconf_to_config_param(config); | |
1012 | enum pin_config_param argument = pinconf_to_config_argument(config); | |
1013 | ||
1014 | dev_dbg(chip->dev, "pin %d [%#lx]: %s %s\n", | |
1015 | pin, config, (param == PIN_CONFIG_OUTPUT) ? "output " : "input", | |
1016 | (param == PIN_CONFIG_OUTPUT) ? (argument ? "high" : "low") : | |
1017 | (argument ? "pull up" : "pull down")); | |
83b423c8 | 1018 | |
0493e649 PC |
1019 | /* on ABx500, there is no GPIO0, so adjust the offset */ |
1020 | offset = pin - 1; | |
1021 | ||
1022 | switch (param) { | |
1023 | case PIN_CONFIG_BIAS_PULL_DOWN: | |
1024 | /* | |
1025 | * if argument = 1 set the pull down | |
1026 | * else clear the pull down | |
1027 | */ | |
1028 | ret = abx500_gpio_direction_input(chip, offset); | |
1029 | /* | |
1030 | * Some chips only support pull down, while some actually | |
1031 | * support both pull up and pull down. Such chips have | |
1032 | * a "pullud" range specified for the pins that support | |
1033 | * both features. If the pin is not within that range, we | |
1034 | * fall back to the old bit set that only support pull down. | |
1035 | */ | |
1036 | if (pullud && | |
1037 | pin >= pullud->first_pin && | |
1038 | pin <= pullud->last_pin) | |
1039 | ret = abx500_config_pull_updown(pct, | |
1040 | pin, | |
1041 | argument ? ABX500_GPIO_PULL_DOWN : ABX500_GPIO_PULL_NONE); | |
1042 | else | |
1043 | /* Chip only supports pull down */ | |
1044 | ret = abx500_gpio_set_bits(chip, AB8500_GPIO_PUD1_REG, | |
1045 | offset, argument ? 0 : 1); | |
1046 | break; | |
83b423c8 | 1047 | |
0493e649 PC |
1048 | case PIN_CONFIG_OUTPUT: |
1049 | ret = abx500_gpio_direction_output(chip, offset, argument); | |
83b423c8 | 1050 | |
0493e649 | 1051 | break; |
83b423c8 | 1052 | |
0493e649 PC |
1053 | default: |
1054 | dev_err(chip->dev, "illegal configuration requested\n"); | |
83b423c8 | 1055 | |
0493e649 PC |
1056 | return -EINVAL; |
1057 | } | |
83b423c8 | 1058 | |
0493e649 PC |
1059 | return ret; |
1060 | } | |
1061 | ||
1062 | static struct pinconf_ops abx500_pinconf_ops = { | |
1063 | .pin_config_get = abx500_pin_config_get, | |
1064 | .pin_config_set = abx500_pin_config_set, | |
1065 | }; | |
1066 | ||
1067 | static struct pinctrl_desc abx500_pinctrl_desc = { | |
1068 | .name = "pinctrl-abx500", | |
1069 | .pctlops = &abx500_pinctrl_ops, | |
1070 | .pmxops = &abx500_pinmux_ops, | |
1071 | .confops = &abx500_pinconf_ops, | |
1072 | .owner = THIS_MODULE, | |
1073 | }; | |
1074 | ||
1075 | static int abx500_get_gpio_num(struct abx500_pinctrl_soc_data *soc) | |
1076 | { | |
1077 | unsigned int lowest = 0; | |
1078 | unsigned int highest = 0; | |
1079 | unsigned int npins = 0; | |
1080 | int i; | |
1081 | ||
1082 | /* | |
1083 | * Compute number of GPIOs from the last SoC gpio range descriptors | |
1084 | * These ranges may include "holes" but the GPIO number space shall | |
1085 | * still be homogeneous, so we need to detect and account for any | |
1086 | * such holes so that these are included in the number of GPIO pins. | |
1087 | */ | |
1088 | for (i = 0; i < soc->gpio_num_ranges; i++) { | |
1089 | unsigned gstart; | |
1090 | unsigned gend; | |
1091 | const struct abx500_pinrange *p; | |
1092 | ||
1093 | p = &soc->gpio_ranges[i]; | |
1094 | gstart = p->offset; | |
1095 | gend = p->offset + p->npins - 1; | |
1096 | ||
1097 | if (i == 0) { | |
1098 | /* First iteration, set start values */ | |
1099 | lowest = gstart; | |
1100 | highest = gend; | |
1101 | } else { | |
1102 | if (gstart < lowest) | |
1103 | lowest = gstart; | |
1104 | if (gend > highest) | |
1105 | highest = gend; | |
1106 | } | |
1107 | } | |
1108 | /* this gives the absolute number of pins */ | |
1109 | npins = highest - lowest + 1; | |
1110 | return npins; | |
1111 | } | |
1112 | ||
f30a3839 LJ |
1113 | static const struct of_device_id abx500_gpio_match[] = { |
1114 | { .compatible = "stericsson,ab8500-gpio", .data = (void *)PINCTRL_AB8500, }, | |
1115 | { .compatible = "stericsson,ab8505-gpio", .data = (void *)PINCTRL_AB8505, }, | |
1116 | { .compatible = "stericsson,ab8540-gpio", .data = (void *)PINCTRL_AB8540, }, | |
1117 | { .compatible = "stericsson,ab9540-gpio", .data = (void *)PINCTRL_AB9540, }, | |
1118 | }; | |
1119 | ||
0493e649 PC |
1120 | static int abx500_gpio_probe(struct platform_device *pdev) |
1121 | { | |
1122 | struct ab8500_platform_data *abx500_pdata = | |
1123 | dev_get_platdata(pdev->dev.parent); | |
f30a3839 LJ |
1124 | struct abx500_gpio_platform_data *pdata = NULL; |
1125 | struct device_node *np = pdev->dev.of_node; | |
0493e649 PC |
1126 | struct abx500_pinctrl *pct; |
1127 | const struct platform_device_id *platid = platform_get_device_id(pdev); | |
f30a3839 | 1128 | unsigned int id = -1; |
fa1ec996 | 1129 | int ret, err; |
0493e649 PC |
1130 | int i; |
1131 | ||
f30a3839 LJ |
1132 | if (abx500_pdata) |
1133 | pdata = abx500_pdata->gpio; | |
83b423c8 | 1134 | if (!pdata) { |
f30a3839 LJ |
1135 | if (np) { |
1136 | const struct of_device_id *match; | |
1137 | ||
1138 | match = of_match_device(abx500_gpio_match, &pdev->dev); | |
1139 | if (!match) | |
1140 | return -ENODEV; | |
1141 | id = (unsigned long)match->data; | |
1142 | } else { | |
1143 | dev_err(&pdev->dev, "gpio dt and platform data missing\n"); | |
1144 | return -ENODEV; | |
1145 | } | |
0493e649 PC |
1146 | } |
1147 | ||
f30a3839 LJ |
1148 | if (platid) |
1149 | id = platid->driver_data; | |
1150 | ||
0493e649 PC |
1151 | pct = devm_kzalloc(&pdev->dev, sizeof(struct abx500_pinctrl), |
1152 | GFP_KERNEL); | |
1153 | if (pct == NULL) { | |
1154 | dev_err(&pdev->dev, | |
1155 | "failed to allocate memory for pct\n"); | |
1156 | return -ENOMEM; | |
1157 | } | |
1158 | ||
1159 | pct->dev = &pdev->dev; | |
1160 | pct->parent = dev_get_drvdata(pdev->dev.parent); | |
1161 | pct->chip = abx500gpio_chip; | |
1162 | pct->chip.dev = &pdev->dev; | |
1163 | pct->chip.base = pdata->gpio_base; | |
1164 | pct->irq_base = pdata->irq_base; | |
f30a3839 | 1165 | pct->chip.base = (np) ? -1 : pdata->gpio_base; |
0493e649 PC |
1166 | |
1167 | /* initialize the lock */ | |
1168 | mutex_init(&pct->lock); | |
1169 | ||
1170 | /* Poke in other ASIC variants here */ | |
f30a3839 | 1171 | switch (id) { |
3c937993 PC |
1172 | case PINCTRL_AB8500: |
1173 | abx500_pinctrl_ab8500_init(&pct->soc); | |
1174 | break; | |
a8f96e41 PC |
1175 | case PINCTRL_AB8540: |
1176 | abx500_pinctrl_ab8540_init(&pct->soc); | |
1177 | break; | |
09dbec3f PC |
1178 | case PINCTRL_AB9540: |
1179 | abx500_pinctrl_ab9540_init(&pct->soc); | |
1180 | break; | |
1aa2d8d4 PC |
1181 | case PINCTRL_AB8505: |
1182 | abx500_pinctrl_ab8505_init(&pct->soc); | |
1183 | break; | |
0493e649 PC |
1184 | default: |
1185 | dev_err(&pdev->dev, "Unsupported pinctrl sub driver (%d)\n", | |
1186 | (int) platid->driver_data); | |
d41e35c3 | 1187 | mutex_destroy(&pct->lock); |
0493e649 PC |
1188 | return -EINVAL; |
1189 | } | |
1190 | ||
1191 | if (!pct->soc) { | |
1192 | dev_err(&pdev->dev, "Invalid SOC data\n"); | |
d41e35c3 | 1193 | mutex_destroy(&pct->lock); |
0493e649 PC |
1194 | return -EINVAL; |
1195 | } | |
1196 | ||
1197 | pct->chip.ngpio = abx500_get_gpio_num(pct->soc); | |
1198 | pct->irq_cluster = pct->soc->gpio_irq_cluster; | |
1199 | pct->irq_cluster_size = pct->soc->ngpio_irq_cluster; | |
1200 | pct->irq_gpio_rising_offset = pct->soc->irq_gpio_rising_offset; | |
1201 | pct->irq_gpio_falling_offset = pct->soc->irq_gpio_falling_offset; | |
1202 | pct->irq_gpio_factor = pct->soc->irq_gpio_factor; | |
1203 | ||
1204 | ret = abx500_gpio_irq_init(pct); | |
1205 | if (ret) | |
1206 | goto out_free; | |
1207 | ret = gpiochip_add(&pct->chip); | |
1208 | if (ret) { | |
83b423c8 | 1209 | dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); |
d41e35c3 | 1210 | mutex_destroy(&pct->lock); |
0493e649 PC |
1211 | goto out_rem_irq; |
1212 | } | |
1213 | dev_info(&pdev->dev, "added gpiochip\n"); | |
1214 | ||
1215 | abx500_pinctrl_desc.pins = pct->soc->pins; | |
1216 | abx500_pinctrl_desc.npins = pct->soc->npins; | |
1217 | pct->pctldev = pinctrl_register(&abx500_pinctrl_desc, &pdev->dev, pct); | |
1218 | if (!pct->pctldev) { | |
1219 | dev_err(&pdev->dev, | |
1220 | "could not register abx500 pinctrl driver\n"); | |
fa1ec996 | 1221 | ret = -EINVAL; |
0493e649 PC |
1222 | goto out_rem_chip; |
1223 | } | |
1224 | dev_info(&pdev->dev, "registered pin controller\n"); | |
1225 | ||
1226 | /* We will handle a range of GPIO pins */ | |
1227 | for (i = 0; i < pct->soc->gpio_num_ranges; i++) { | |
1228 | const struct abx500_pinrange *p = &pct->soc->gpio_ranges[i]; | |
1229 | ||
1230 | ret = gpiochip_add_pin_range(&pct->chip, | |
1231 | dev_name(&pdev->dev), | |
1232 | p->offset - 1, p->offset, p->npins); | |
1233 | if (ret < 0) | |
fa1ec996 | 1234 | goto out_rem_chip; |
0493e649 PC |
1235 | } |
1236 | ||
1237 | platform_set_drvdata(pdev, pct); | |
1238 | dev_info(&pdev->dev, "initialized abx500 pinctrl driver\n"); | |
1239 | ||
1240 | return 0; | |
1241 | ||
1242 | out_rem_chip: | |
fa1ec996 LJ |
1243 | err = gpiochip_remove(&pct->chip); |
1244 | if (err) | |
0493e649 PC |
1245 | dev_info(&pdev->dev, "failed to remove gpiochip\n"); |
1246 | out_rem_irq: | |
1247 | abx500_gpio_irq_remove(pct); | |
1248 | out_free: | |
1249 | mutex_destroy(&pct->lock); | |
1250 | return ret; | |
1251 | } | |
1252 | ||
83b423c8 | 1253 | /** |
0493e649 | 1254 | * abx500_gpio_remove() - remove Ab8500-gpio driver |
83b423c8 | 1255 | * @pdev: Platform device registered |
0493e649 PC |
1256 | */ |
1257 | static int abx500_gpio_remove(struct platform_device *pdev) | |
1258 | { | |
1259 | struct abx500_pinctrl *pct = platform_get_drvdata(pdev); | |
1260 | int ret; | |
1261 | ||
1262 | ret = gpiochip_remove(&pct->chip); | |
1263 | if (ret < 0) { | |
1264 | dev_err(pct->dev, "unable to remove gpiochip: %d\n", | |
1265 | ret); | |
1266 | return ret; | |
1267 | } | |
1268 | ||
1269 | mutex_destroy(&pct->lock); | |
1270 | ||
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | static const struct platform_device_id abx500_pinctrl_id[] = { | |
1275 | { "pinctrl-ab8500", PINCTRL_AB8500 }, | |
1276 | { "pinctrl-ab8540", PINCTRL_AB8540 }, | |
1277 | { "pinctrl-ab9540", PINCTRL_AB9540 }, | |
1278 | { "pinctrl-ab8505", PINCTRL_AB8505 }, | |
1279 | { }, | |
1280 | }; | |
1281 | ||
1282 | static struct platform_driver abx500_gpio_driver = { | |
1283 | .driver = { | |
1284 | .name = "abx500-gpio", | |
1285 | .owner = THIS_MODULE, | |
f30a3839 | 1286 | .of_match_table = abx500_gpio_match, |
0493e649 PC |
1287 | }, |
1288 | .probe = abx500_gpio_probe, | |
1289 | .remove = abx500_gpio_remove, | |
1290 | .id_table = abx500_pinctrl_id, | |
1291 | }; | |
1292 | ||
1293 | static int __init abx500_gpio_init(void) | |
1294 | { | |
1295 | return platform_driver_register(&abx500_gpio_driver); | |
1296 | } | |
1297 | core_initcall(abx500_gpio_init); | |
1298 | ||
1299 | MODULE_AUTHOR("Patrice Chotard <patrice.chotard@st.com>"); | |
1300 | MODULE_DESCRIPTION("Driver allows to use AxB5xx unused pins to be used as GPIO"); | |
1301 | MODULE_ALIAS("platform:abx500-gpio"); | |
1302 | MODULE_LICENSE("GPL v2"); |