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a5d811bb MN |
1 | /* |
2 | * Pinctrl GPIO driver for Intel Baytrail | |
3 | * Copyright (c) 2012-2013, Intel Corporation. | |
4 | * | |
5 | * Author: Mathias Nyman <mathias.nyman@linux.intel.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms and conditions of the GNU General Public License, | |
9 | * version 2, as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/types.h> | |
26 | #include <linux/bitops.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/irq.h> | |
29 | #include <linux/gpio.h> | |
30 | #include <linux/irqdomain.h> | |
31 | #include <linux/acpi.h> | |
a5d811bb MN |
32 | #include <linux/platform_device.h> |
33 | #include <linux/seq_file.h> | |
34 | #include <linux/io.h> | |
35 | #include <linux/pm_runtime.h> | |
36 | #include <linux/pinctrl/pinctrl.h> | |
37 | ||
38 | /* memory mapped register offsets */ | |
39 | #define BYT_CONF0_REG 0x000 | |
40 | #define BYT_CONF1_REG 0x004 | |
41 | #define BYT_VAL_REG 0x008 | |
42 | #define BYT_DFT_REG 0x00c | |
43 | #define BYT_INT_STAT_REG 0x800 | |
44 | ||
45 | /* BYT_CONF0_REG register bits */ | |
3ff95885 | 46 | #define BYT_IODEN BIT(31) |
a5d811bb MN |
47 | #define BYT_TRIG_NEG BIT(26) |
48 | #define BYT_TRIG_POS BIT(25) | |
49 | #define BYT_TRIG_LVL BIT(24) | |
3ff95885 MW |
50 | #define BYT_PULL_STR_SHIFT 9 |
51 | #define BYT_PULL_STR_MASK (3 << BYT_PULL_STR_SHIFT) | |
52 | #define BYT_PULL_STR_2K (0 << BYT_PULL_STR_SHIFT) | |
53 | #define BYT_PULL_STR_10K (1 << BYT_PULL_STR_SHIFT) | |
54 | #define BYT_PULL_STR_20K (2 << BYT_PULL_STR_SHIFT) | |
55 | #define BYT_PULL_STR_40K (3 << BYT_PULL_STR_SHIFT) | |
56 | #define BYT_PULL_ASSIGN_SHIFT 7 | |
57 | #define BYT_PULL_ASSIGN_MASK (3 << BYT_PULL_ASSIGN_SHIFT) | |
58 | #define BYT_PULL_ASSIGN_UP (1 << BYT_PULL_ASSIGN_SHIFT) | |
59 | #define BYT_PULL_ASSIGN_DOWN (2 << BYT_PULL_ASSIGN_SHIFT) | |
a5d811bb MN |
60 | #define BYT_PIN_MUX 0x07 |
61 | ||
62 | /* BYT_VAL_REG register bits */ | |
63 | #define BYT_INPUT_EN BIT(2) /* 0: input enabled (active low)*/ | |
64 | #define BYT_OUTPUT_EN BIT(1) /* 0: output enabled (active low)*/ | |
65 | #define BYT_LEVEL BIT(0) | |
66 | ||
67 | #define BYT_DIR_MASK (BIT(1) | BIT(2)) | |
68 | #define BYT_TRIG_MASK (BIT(26) | BIT(25) | BIT(24)) | |
69 | ||
70 | #define BYT_NGPIO_SCORE 102 | |
71 | #define BYT_NGPIO_NCORE 28 | |
72 | #define BYT_NGPIO_SUS 44 | |
73 | ||
42bd0070 CKH |
74 | #define BYT_SCORE_ACPI_UID "1" |
75 | #define BYT_NCORE_ACPI_UID "2" | |
76 | #define BYT_SUS_ACPI_UID "3" | |
77 | ||
a5d811bb MN |
78 | /* |
79 | * Baytrail gpio controller consist of three separate sub-controllers called | |
80 | * SCORE, NCORE and SUS. The sub-controllers are identified by their acpi UID. | |
81 | * | |
82 | * GPIO numbering is _not_ ordered meaning that gpio # 0 in ACPI namespace does | |
83 | * _not_ correspond to the first gpio register at controller's gpio base. | |
84 | * There is no logic or pattern in mapping gpio numbers to registers (pads) so | |
85 | * each sub-controller needs to have its own mapping table | |
86 | */ | |
87 | ||
88 | /* score_pins[gpio_nr] = pad_nr */ | |
89 | ||
90 | static unsigned const score_pins[BYT_NGPIO_SCORE] = { | |
91 | 85, 89, 93, 96, 99, 102, 98, 101, 34, 37, | |
92 | 36, 38, 39, 35, 40, 84, 62, 61, 64, 59, | |
93 | 54, 56, 60, 55, 63, 57, 51, 50, 53, 47, | |
94 | 52, 49, 48, 43, 46, 41, 45, 42, 58, 44, | |
95 | 95, 105, 70, 68, 67, 66, 69, 71, 65, 72, | |
96 | 86, 90, 88, 92, 103, 77, 79, 83, 78, 81, | |
97 | 80, 82, 13, 12, 15, 14, 17, 18, 19, 16, | |
98 | 2, 1, 0, 4, 6, 7, 9, 8, 33, 32, | |
99 | 31, 30, 29, 27, 25, 28, 26, 23, 21, 20, | |
100 | 24, 22, 5, 3, 10, 11, 106, 87, 91, 104, | |
101 | 97, 100, | |
102 | }; | |
103 | ||
104 | static unsigned const ncore_pins[BYT_NGPIO_NCORE] = { | |
105 | 19, 18, 17, 20, 21, 22, 24, 25, 23, 16, | |
106 | 14, 15, 12, 26, 27, 1, 4, 8, 11, 0, | |
107 | 3, 6, 10, 13, 2, 5, 9, 7, | |
108 | }; | |
109 | ||
110 | static unsigned const sus_pins[BYT_NGPIO_SUS] = { | |
111 | 29, 33, 30, 31, 32, 34, 36, 35, 38, 37, | |
112 | 18, 7, 11, 20, 17, 1, 8, 10, 19, 12, | |
113 | 0, 2, 23, 39, 28, 27, 22, 21, 24, 25, | |
114 | 26, 51, 56, 54, 49, 55, 48, 57, 50, 58, | |
115 | 52, 53, 59, 40, | |
116 | }; | |
117 | ||
118 | static struct pinctrl_gpio_range byt_ranges[] = { | |
119 | { | |
42bd0070 | 120 | .name = BYT_SCORE_ACPI_UID, /* match with acpi _UID in probe */ |
a5d811bb MN |
121 | .npins = BYT_NGPIO_SCORE, |
122 | .pins = score_pins, | |
123 | }, | |
124 | { | |
42bd0070 | 125 | .name = BYT_NCORE_ACPI_UID, |
a5d811bb MN |
126 | .npins = BYT_NGPIO_NCORE, |
127 | .pins = ncore_pins, | |
128 | }, | |
129 | { | |
42bd0070 | 130 | .name = BYT_SUS_ACPI_UID, |
a5d811bb MN |
131 | .npins = BYT_NGPIO_SUS, |
132 | .pins = sus_pins, | |
133 | }, | |
134 | { | |
135 | }, | |
136 | }; | |
137 | ||
138 | struct byt_gpio { | |
139 | struct gpio_chip chip; | |
140 | struct irq_domain *domain; | |
141 | struct platform_device *pdev; | |
142 | spinlock_t lock; | |
143 | void __iomem *reg_base; | |
144 | struct pinctrl_gpio_range *range; | |
145 | }; | |
146 | ||
17e52464 AS |
147 | #define to_byt_gpio(c) container_of(c, struct byt_gpio, chip) |
148 | ||
a5d811bb MN |
149 | static void __iomem *byt_gpio_reg(struct gpio_chip *chip, unsigned offset, |
150 | int reg) | |
151 | { | |
17e52464 | 152 | struct byt_gpio *vg = to_byt_gpio(chip); |
a5d811bb | 153 | u32 reg_offset; |
a5d811bb MN |
154 | |
155 | if (reg == BYT_INT_STAT_REG) | |
156 | reg_offset = (offset / 32) * 4; | |
157 | else | |
158 | reg_offset = vg->range->pins[offset] * 16; | |
159 | ||
9c5b6557 | 160 | return vg->reg_base + reg_offset + reg; |
a5d811bb MN |
161 | } |
162 | ||
42bd0070 CKH |
163 | static bool is_special_pin(struct byt_gpio *vg, unsigned offset) |
164 | { | |
165 | /* SCORE pin 92-93 */ | |
166 | if (!strcmp(vg->range->name, BYT_SCORE_ACPI_UID) && | |
167 | offset >= 92 && offset <= 93) | |
168 | return true; | |
169 | ||
170 | /* SUS pin 11-21 */ | |
171 | if (!strcmp(vg->range->name, BYT_SUS_ACPI_UID) && | |
172 | offset >= 11 && offset <= 21) | |
173 | return true; | |
174 | ||
175 | return false; | |
176 | } | |
177 | ||
a5d811bb MN |
178 | static int byt_gpio_request(struct gpio_chip *chip, unsigned offset) |
179 | { | |
17e52464 | 180 | struct byt_gpio *vg = to_byt_gpio(chip); |
42bd0070 CKH |
181 | void __iomem *reg = byt_gpio_reg(chip, offset, BYT_CONF0_REG); |
182 | u32 value; | |
183 | bool special; | |
184 | ||
185 | /* | |
186 | * In most cases, func pin mux 000 means GPIO function. | |
187 | * But, some pins may have func pin mux 001 represents | |
188 | * GPIO function. Only allow user to export pin with | |
189 | * func pin mux preset as GPIO function by BIOS/FW. | |
190 | */ | |
191 | value = readl(reg) & BYT_PIN_MUX; | |
192 | special = is_special_pin(vg, offset); | |
193 | if ((special && value != 1) || (!special && value)) { | |
194 | dev_err(&vg->pdev->dev, | |
195 | "pin %u cannot be used as GPIO.\n", offset); | |
196 | return -EINVAL; | |
197 | } | |
a5d811bb MN |
198 | |
199 | pm_runtime_get(&vg->pdev->dev); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static void byt_gpio_free(struct gpio_chip *chip, unsigned offset) | |
205 | { | |
17e52464 | 206 | struct byt_gpio *vg = to_byt_gpio(chip); |
a5d811bb MN |
207 | void __iomem *reg = byt_gpio_reg(&vg->chip, offset, BYT_CONF0_REG); |
208 | u32 value; | |
209 | ||
210 | /* clear interrupt triggering */ | |
211 | value = readl(reg); | |
212 | value &= ~(BYT_TRIG_POS | BYT_TRIG_NEG | BYT_TRIG_LVL); | |
213 | writel(value, reg); | |
214 | ||
215 | pm_runtime_put(&vg->pdev->dev); | |
216 | } | |
217 | ||
218 | static int byt_irq_type(struct irq_data *d, unsigned type) | |
219 | { | |
220 | struct byt_gpio *vg = irq_data_get_irq_chip_data(d); | |
221 | u32 offset = irqd_to_hwirq(d); | |
222 | u32 value; | |
223 | unsigned long flags; | |
224 | void __iomem *reg = byt_gpio_reg(&vg->chip, offset, BYT_CONF0_REG); | |
225 | ||
226 | if (offset >= vg->chip.ngpio) | |
227 | return -EINVAL; | |
228 | ||
229 | spin_lock_irqsave(&vg->lock, flags); | |
230 | value = readl(reg); | |
231 | ||
232 | /* For level trigges the BYT_TRIG_POS and BYT_TRIG_NEG bits | |
233 | * are used to indicate high and low level triggering | |
234 | */ | |
235 | value &= ~(BYT_TRIG_POS | BYT_TRIG_NEG | BYT_TRIG_LVL); | |
236 | ||
237 | switch (type) { | |
238 | case IRQ_TYPE_LEVEL_HIGH: | |
239 | value |= BYT_TRIG_LVL; | |
240 | case IRQ_TYPE_EDGE_RISING: | |
241 | value |= BYT_TRIG_POS; | |
242 | break; | |
243 | case IRQ_TYPE_LEVEL_LOW: | |
244 | value |= BYT_TRIG_LVL; | |
245 | case IRQ_TYPE_EDGE_FALLING: | |
246 | value |= BYT_TRIG_NEG; | |
247 | break; | |
248 | case IRQ_TYPE_EDGE_BOTH: | |
249 | value |= (BYT_TRIG_NEG | BYT_TRIG_POS); | |
250 | break; | |
251 | } | |
252 | writel(value, reg); | |
253 | ||
254 | spin_unlock_irqrestore(&vg->lock, flags); | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | static int byt_gpio_get(struct gpio_chip *chip, unsigned offset) | |
260 | { | |
261 | void __iomem *reg = byt_gpio_reg(chip, offset, BYT_VAL_REG); | |
262 | return readl(reg) & BYT_LEVEL; | |
263 | } | |
264 | ||
265 | static void byt_gpio_set(struct gpio_chip *chip, unsigned offset, int value) | |
266 | { | |
17e52464 | 267 | struct byt_gpio *vg = to_byt_gpio(chip); |
a5d811bb MN |
268 | void __iomem *reg = byt_gpio_reg(chip, offset, BYT_VAL_REG); |
269 | unsigned long flags; | |
270 | u32 old_val; | |
271 | ||
272 | spin_lock_irqsave(&vg->lock, flags); | |
273 | ||
274 | old_val = readl(reg); | |
275 | ||
276 | if (value) | |
277 | writel(old_val | BYT_LEVEL, reg); | |
278 | else | |
279 | writel(old_val & ~BYT_LEVEL, reg); | |
280 | ||
281 | spin_unlock_irqrestore(&vg->lock, flags); | |
282 | } | |
283 | ||
284 | static int byt_gpio_direction_input(struct gpio_chip *chip, unsigned offset) | |
285 | { | |
17e52464 | 286 | struct byt_gpio *vg = to_byt_gpio(chip); |
a5d811bb MN |
287 | void __iomem *reg = byt_gpio_reg(chip, offset, BYT_VAL_REG); |
288 | unsigned long flags; | |
289 | u32 value; | |
290 | ||
291 | spin_lock_irqsave(&vg->lock, flags); | |
292 | ||
293 | value = readl(reg) | BYT_DIR_MASK; | |
496940c1 | 294 | value &= ~BYT_INPUT_EN; /* active low */ |
a5d811bb MN |
295 | writel(value, reg); |
296 | ||
297 | spin_unlock_irqrestore(&vg->lock, flags); | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | static int byt_gpio_direction_output(struct gpio_chip *chip, | |
303 | unsigned gpio, int value) | |
304 | { | |
17e52464 | 305 | struct byt_gpio *vg = to_byt_gpio(chip); |
a5d811bb MN |
306 | void __iomem *reg = byt_gpio_reg(chip, gpio, BYT_VAL_REG); |
307 | unsigned long flags; | |
308 | u32 reg_val; | |
309 | ||
310 | spin_lock_irqsave(&vg->lock, flags); | |
311 | ||
496940c1 AS |
312 | reg_val = readl(reg) | BYT_DIR_MASK; |
313 | reg_val &= ~BYT_OUTPUT_EN; | |
314 | ||
315 | if (value) | |
316 | writel(reg_val | BYT_LEVEL, reg); | |
317 | else | |
318 | writel(reg_val & ~BYT_LEVEL, reg); | |
a5d811bb MN |
319 | |
320 | spin_unlock_irqrestore(&vg->lock, flags); | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | static void byt_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) | |
326 | { | |
17e52464 | 327 | struct byt_gpio *vg = to_byt_gpio(chip); |
a5d811bb MN |
328 | int i; |
329 | unsigned long flags; | |
330 | u32 conf0, val, offs; | |
331 | ||
332 | spin_lock_irqsave(&vg->lock, flags); | |
333 | ||
334 | for (i = 0; i < vg->chip.ngpio; i++) { | |
3ff95885 MW |
335 | const char *pull_str = NULL; |
336 | const char *pull = NULL; | |
a4d8d6da | 337 | const char *label; |
a5d811bb MN |
338 | offs = vg->range->pins[i] * 16; |
339 | conf0 = readl(vg->reg_base + offs + BYT_CONF0_REG); | |
340 | val = readl(vg->reg_base + offs + BYT_VAL_REG); | |
341 | ||
a4d8d6da MN |
342 | label = gpiochip_is_requested(chip, i); |
343 | if (!label) | |
344 | label = "Unrequested"; | |
345 | ||
3ff95885 MW |
346 | switch (conf0 & BYT_PULL_ASSIGN_MASK) { |
347 | case BYT_PULL_ASSIGN_UP: | |
348 | pull = "up"; | |
349 | break; | |
350 | case BYT_PULL_ASSIGN_DOWN: | |
351 | pull = "down"; | |
352 | break; | |
353 | } | |
354 | ||
355 | switch (conf0 & BYT_PULL_STR_MASK) { | |
356 | case BYT_PULL_STR_2K: | |
357 | pull_str = "2k"; | |
358 | break; | |
359 | case BYT_PULL_STR_10K: | |
360 | pull_str = "10k"; | |
361 | break; | |
362 | case BYT_PULL_STR_20K: | |
363 | pull_str = "20k"; | |
364 | break; | |
365 | case BYT_PULL_STR_40K: | |
366 | pull_str = "40k"; | |
367 | break; | |
368 | } | |
369 | ||
a5d811bb | 370 | seq_printf(s, |
3ff95885 | 371 | " gpio-%-3d (%-20.20s) %s %s %s pad-%-3d offset:0x%03x mux:%d %s%s%s", |
a5d811bb | 372 | i, |
a4d8d6da | 373 | label, |
a5d811bb MN |
374 | val & BYT_INPUT_EN ? " " : "in", |
375 | val & BYT_OUTPUT_EN ? " " : "out", | |
376 | val & BYT_LEVEL ? "hi" : "lo", | |
377 | vg->range->pins[i], offs, | |
378 | conf0 & 0x7, | |
3ff95885 MW |
379 | conf0 & BYT_TRIG_NEG ? " fall" : " ", |
380 | conf0 & BYT_TRIG_POS ? " rise" : " ", | |
381 | conf0 & BYT_TRIG_LVL ? " level" : " "); | |
382 | ||
383 | if (pull && pull_str) | |
384 | seq_printf(s, " %-4s %-3s", pull, pull_str); | |
385 | else | |
386 | seq_puts(s, " "); | |
387 | ||
388 | if (conf0 & BYT_IODEN) | |
389 | seq_puts(s, " open-drain"); | |
390 | ||
391 | seq_puts(s, "\n"); | |
a5d811bb MN |
392 | } |
393 | spin_unlock_irqrestore(&vg->lock, flags); | |
394 | } | |
395 | ||
396 | static int byt_gpio_to_irq(struct gpio_chip *chip, unsigned offset) | |
397 | { | |
17e52464 | 398 | struct byt_gpio *vg = to_byt_gpio(chip); |
a5d811bb MN |
399 | return irq_create_mapping(vg->domain, offset); |
400 | } | |
401 | ||
402 | static void byt_gpio_irq_handler(unsigned irq, struct irq_desc *desc) | |
403 | { | |
404 | struct irq_data *data = irq_desc_get_irq_data(desc); | |
405 | struct byt_gpio *vg = irq_data_get_irq_handler_data(data); | |
406 | struct irq_chip *chip = irq_data_get_irq_chip(data); | |
407 | u32 base, pin, mask; | |
408 | void __iomem *reg; | |
409 | u32 pending; | |
410 | unsigned virq; | |
411 | int looplimit = 0; | |
412 | ||
413 | /* check from GPIO controller which pin triggered the interrupt */ | |
414 | for (base = 0; base < vg->chip.ngpio; base += 32) { | |
415 | ||
416 | reg = byt_gpio_reg(&vg->chip, base, BYT_INT_STAT_REG); | |
417 | ||
418 | while ((pending = readl(reg))) { | |
419 | pin = __ffs(pending); | |
420 | mask = BIT(pin); | |
421 | /* Clear before handling so we can't lose an edge */ | |
422 | writel(mask, reg); | |
423 | ||
424 | virq = irq_find_mapping(vg->domain, base + pin); | |
425 | generic_handle_irq(virq); | |
426 | ||
427 | /* In case bios or user sets triggering incorretly a pin | |
428 | * might remain in "interrupt triggered" state. | |
429 | */ | |
430 | if (looplimit++ > 32) { | |
431 | dev_err(&vg->pdev->dev, | |
432 | "Gpio %d interrupt flood, disabling\n", | |
433 | base + pin); | |
434 | ||
435 | reg = byt_gpio_reg(&vg->chip, base + pin, | |
436 | BYT_CONF0_REG); | |
437 | mask = readl(reg); | |
438 | mask &= ~(BYT_TRIG_NEG | BYT_TRIG_POS | | |
439 | BYT_TRIG_LVL); | |
440 | writel(mask, reg); | |
441 | mask = readl(reg); /* flush */ | |
442 | break; | |
443 | } | |
444 | } | |
445 | } | |
446 | chip->irq_eoi(data); | |
447 | } | |
448 | ||
449 | static void byt_irq_unmask(struct irq_data *d) | |
450 | { | |
451 | } | |
452 | ||
453 | static void byt_irq_mask(struct irq_data *d) | |
454 | { | |
455 | } | |
456 | ||
57ef0428 | 457 | static int byt_irq_reqres(struct irq_data *d) |
1d2d8ce6 LW |
458 | { |
459 | struct byt_gpio *vg = irq_data_get_irq_chip_data(d); | |
460 | ||
57ef0428 | 461 | if (gpio_lock_as_irq(&vg->chip, irqd_to_hwirq(d))) { |
1d2d8ce6 LW |
462 | dev_err(vg->chip.dev, |
463 | "unable to lock HW IRQ %lu for IRQ\n", | |
464 | irqd_to_hwirq(d)); | |
57ef0428 LW |
465 | return -EINVAL; |
466 | } | |
1d2d8ce6 LW |
467 | return 0; |
468 | } | |
469 | ||
57ef0428 | 470 | static void byt_irq_relres(struct irq_data *d) |
1d2d8ce6 LW |
471 | { |
472 | struct byt_gpio *vg = irq_data_get_irq_chip_data(d); | |
473 | ||
1d2d8ce6 LW |
474 | gpio_unlock_as_irq(&vg->chip, irqd_to_hwirq(d)); |
475 | } | |
476 | ||
a5d811bb MN |
477 | static struct irq_chip byt_irqchip = { |
478 | .name = "BYT-GPIO", | |
479 | .irq_mask = byt_irq_mask, | |
480 | .irq_unmask = byt_irq_unmask, | |
481 | .irq_set_type = byt_irq_type, | |
57ef0428 LW |
482 | .irq_request_resources = byt_irq_reqres, |
483 | .irq_release_resources = byt_irq_relres, | |
a5d811bb MN |
484 | }; |
485 | ||
486 | static void byt_gpio_irq_init_hw(struct byt_gpio *vg) | |
487 | { | |
488 | void __iomem *reg; | |
489 | u32 base, value; | |
490 | ||
491 | /* clear interrupt status trigger registers */ | |
492 | for (base = 0; base < vg->chip.ngpio; base += 32) { | |
493 | reg = byt_gpio_reg(&vg->chip, base, BYT_INT_STAT_REG); | |
494 | writel(0xffffffff, reg); | |
495 | /* make sure trigger bits are cleared, if not then a pin | |
496 | might be misconfigured in bios */ | |
497 | value = readl(reg); | |
498 | if (value) | |
499 | dev_err(&vg->pdev->dev, | |
500 | "GPIO interrupt error, pins misconfigured\n"); | |
501 | } | |
502 | } | |
503 | ||
504 | static int byt_gpio_irq_map(struct irq_domain *d, unsigned int virq, | |
505 | irq_hw_number_t hw) | |
506 | { | |
507 | struct byt_gpio *vg = d->host_data; | |
508 | ||
509 | irq_set_chip_and_handler_name(virq, &byt_irqchip, handle_simple_irq, | |
510 | "demux"); | |
511 | irq_set_chip_data(virq, vg); | |
512 | irq_set_irq_type(virq, IRQ_TYPE_NONE); | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
517 | static const struct irq_domain_ops byt_gpio_irq_ops = { | |
518 | .map = byt_gpio_irq_map, | |
519 | }; | |
520 | ||
521 | static int byt_gpio_probe(struct platform_device *pdev) | |
522 | { | |
523 | struct byt_gpio *vg; | |
524 | struct gpio_chip *gc; | |
525 | struct resource *mem_rc, *irq_rc; | |
526 | struct device *dev = &pdev->dev; | |
527 | struct acpi_device *acpi_dev; | |
528 | struct pinctrl_gpio_range *range; | |
529 | acpi_handle handle = ACPI_HANDLE(dev); | |
530 | unsigned hwirq; | |
531 | int ret; | |
532 | ||
533 | if (acpi_bus_get_device(handle, &acpi_dev)) | |
534 | return -ENODEV; | |
535 | ||
536 | vg = devm_kzalloc(dev, sizeof(struct byt_gpio), GFP_KERNEL); | |
537 | if (!vg) { | |
538 | dev_err(&pdev->dev, "can't allocate byt_gpio chip data\n"); | |
539 | return -ENOMEM; | |
540 | } | |
541 | ||
542 | for (range = byt_ranges; range->name; range++) { | |
543 | if (!strcmp(acpi_dev->pnp.unique_id, range->name)) { | |
544 | vg->chip.ngpio = range->npins; | |
545 | vg->range = range; | |
546 | break; | |
547 | } | |
548 | } | |
549 | ||
550 | if (!vg->chip.ngpio || !vg->range) | |
551 | return -ENODEV; | |
552 | ||
553 | vg->pdev = pdev; | |
554 | platform_set_drvdata(pdev, vg); | |
555 | ||
556 | mem_rc = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
557 | vg->reg_base = devm_ioremap_resource(dev, mem_rc); | |
558 | if (IS_ERR(vg->reg_base)) | |
559 | return PTR_ERR(vg->reg_base); | |
560 | ||
561 | spin_lock_init(&vg->lock); | |
562 | ||
563 | gc = &vg->chip; | |
564 | gc->label = dev_name(&pdev->dev); | |
565 | gc->owner = THIS_MODULE; | |
566 | gc->request = byt_gpio_request; | |
567 | gc->free = byt_gpio_free; | |
568 | gc->direction_input = byt_gpio_direction_input; | |
569 | gc->direction_output = byt_gpio_direction_output; | |
570 | gc->get = byt_gpio_get; | |
571 | gc->set = byt_gpio_set; | |
572 | gc->dbg_show = byt_gpio_dbg_show; | |
573 | gc->base = -1; | |
9fb1f39e | 574 | gc->can_sleep = false; |
a5d811bb MN |
575 | gc->dev = dev; |
576 | ||
a5d811bb MN |
577 | /* set up interrupts */ |
578 | irq_rc = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
579 | if (irq_rc && irq_rc->start) { | |
580 | hwirq = irq_rc->start; | |
581 | gc->to_irq = byt_gpio_to_irq; | |
582 | ||
583 | vg->domain = irq_domain_add_linear(NULL, gc->ngpio, | |
584 | &byt_gpio_irq_ops, vg); | |
585 | if (!vg->domain) | |
586 | return -ENXIO; | |
587 | ||
588 | byt_gpio_irq_init_hw(vg); | |
589 | ||
590 | irq_set_handler_data(hwirq, vg); | |
591 | irq_set_chained_handler(hwirq, byt_gpio_irq_handler); | |
a5d811bb MN |
592 | } |
593 | ||
605a7bca JY |
594 | ret = gpiochip_add(gc); |
595 | if (ret) { | |
596 | dev_err(&pdev->dev, "failed adding byt-gpio chip\n"); | |
597 | return ret; | |
598 | } | |
599 | ||
a5d811bb MN |
600 | pm_runtime_enable(dev); |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
605 | static int byt_gpio_runtime_suspend(struct device *dev) | |
606 | { | |
607 | return 0; | |
608 | } | |
609 | ||
610 | static int byt_gpio_runtime_resume(struct device *dev) | |
611 | { | |
612 | return 0; | |
613 | } | |
614 | ||
615 | static const struct dev_pm_ops byt_gpio_pm_ops = { | |
616 | .runtime_suspend = byt_gpio_runtime_suspend, | |
617 | .runtime_resume = byt_gpio_runtime_resume, | |
618 | }; | |
619 | ||
620 | static const struct acpi_device_id byt_gpio_acpi_match[] = { | |
621 | { "INT33B2", 0 }, | |
20482d32 | 622 | { "INT33FC", 0 }, |
a5d811bb MN |
623 | { } |
624 | }; | |
625 | MODULE_DEVICE_TABLE(acpi, byt_gpio_acpi_match); | |
626 | ||
627 | static int byt_gpio_remove(struct platform_device *pdev) | |
628 | { | |
629 | struct byt_gpio *vg = platform_get_drvdata(pdev); | |
630 | int err; | |
ec243320 | 631 | |
a5d811bb MN |
632 | pm_runtime_disable(&pdev->dev); |
633 | err = gpiochip_remove(&vg->chip); | |
634 | if (err) | |
635 | dev_warn(&pdev->dev, "failed to remove gpio_chip.\n"); | |
636 | ||
637 | return 0; | |
638 | } | |
639 | ||
640 | static struct platform_driver byt_gpio_driver = { | |
641 | .probe = byt_gpio_probe, | |
642 | .remove = byt_gpio_remove, | |
643 | .driver = { | |
644 | .name = "byt_gpio", | |
645 | .owner = THIS_MODULE, | |
646 | .pm = &byt_gpio_pm_ops, | |
647 | .acpi_match_table = ACPI_PTR(byt_gpio_acpi_match), | |
648 | }, | |
649 | }; | |
650 | ||
651 | static int __init byt_gpio_init(void) | |
652 | { | |
653 | return platform_driver_register(&byt_gpio_driver); | |
654 | } | |
655 | ||
656 | subsys_initcall(byt_gpio_init); |