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1b39d5f2 KK |
1 | /* |
2 | * Copyright (c) 2009-2011 Samsung Electronics Co., Ltd. | |
3 | * http://www.samsung.com/ | |
4 | * | |
5 | * Copyright 2008 Openmoko, Inc. | |
6 | * Copyright 2008 Simtec Electronics | |
7 | * Ben Dooks <ben@simtec.co.uk> | |
8 | * http://armlinux.simtec.co.uk/ | |
9 | * | |
10 | * SAMSUNG - GPIOlib support | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/irq.h> | |
19 | #include <linux/io.h> | |
20 | #include <linux/gpio.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/interrupt.h> | |
edbaa603 | 25 | #include <linux/device.h> |
1b39d5f2 | 26 | #include <linux/ioport.h> |
659d73ad TA |
27 | #include <linux/of.h> |
28 | #include <linux/slab.h> | |
29 | #include <linux/of_address.h> | |
1b39d5f2 KK |
30 | |
31 | #include <asm/irq.h> | |
32 | ||
1b39d5f2 | 33 | #include <mach/map.h> |
1b39d5f2 | 34 | #include <mach/regs-gpio.h> |
b0161caa | 35 | #include <mach/gpio-samsung.h> |
1b39d5f2 KK |
36 | |
37 | #include <plat/cpu.h> | |
38 | #include <plat/gpio-core.h> | |
39 | #include <plat/gpio-cfg.h> | |
40 | #include <plat/gpio-cfg-helpers.h> | |
1b39d5f2 KK |
41 | #include <plat/pm.h> |
42 | ||
1b39d5f2 KK |
43 | int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip, |
44 | unsigned int off, samsung_gpio_pull_t pull) | |
45 | { | |
46 | void __iomem *reg = chip->base + 0x08; | |
47 | int shift = off * 2; | |
48 | u32 pup; | |
49 | ||
50 | pup = __raw_readl(reg); | |
51 | pup &= ~(3 << shift); | |
52 | pup |= pull << shift; | |
53 | __raw_writel(pup, reg); | |
54 | ||
55 | return 0; | |
56 | } | |
57 | ||
58 | samsung_gpio_pull_t samsung_gpio_getpull_updown(struct samsung_gpio_chip *chip, | |
59 | unsigned int off) | |
60 | { | |
61 | void __iomem *reg = chip->base + 0x08; | |
62 | int shift = off * 2; | |
63 | u32 pup = __raw_readl(reg); | |
64 | ||
65 | pup >>= shift; | |
66 | pup &= 0x3; | |
67 | ||
68 | return (__force samsung_gpio_pull_t)pup; | |
69 | } | |
70 | ||
71 | int s3c2443_gpio_setpull(struct samsung_gpio_chip *chip, | |
72 | unsigned int off, samsung_gpio_pull_t pull) | |
73 | { | |
74 | switch (pull) { | |
75 | case S3C_GPIO_PULL_NONE: | |
76 | pull = 0x01; | |
77 | break; | |
78 | case S3C_GPIO_PULL_UP: | |
79 | pull = 0x00; | |
80 | break; | |
81 | case S3C_GPIO_PULL_DOWN: | |
82 | pull = 0x02; | |
83 | break; | |
84 | } | |
85 | return samsung_gpio_setpull_updown(chip, off, pull); | |
86 | } | |
87 | ||
88 | samsung_gpio_pull_t s3c2443_gpio_getpull(struct samsung_gpio_chip *chip, | |
89 | unsigned int off) | |
90 | { | |
91 | samsung_gpio_pull_t pull; | |
92 | ||
93 | pull = samsung_gpio_getpull_updown(chip, off); | |
94 | ||
95 | switch (pull) { | |
96 | case 0x00: | |
97 | pull = S3C_GPIO_PULL_UP; | |
98 | break; | |
99 | case 0x01: | |
100 | case 0x03: | |
101 | pull = S3C_GPIO_PULL_NONE; | |
102 | break; | |
103 | case 0x02: | |
104 | pull = S3C_GPIO_PULL_DOWN; | |
105 | break; | |
106 | } | |
107 | ||
108 | return pull; | |
109 | } | |
110 | ||
111 | static int s3c24xx_gpio_setpull_1(struct samsung_gpio_chip *chip, | |
112 | unsigned int off, samsung_gpio_pull_t pull, | |
113 | samsung_gpio_pull_t updown) | |
114 | { | |
115 | void __iomem *reg = chip->base + 0x08; | |
116 | u32 pup = __raw_readl(reg); | |
117 | ||
118 | if (pull == updown) | |
119 | pup &= ~(1 << off); | |
120 | else if (pull == S3C_GPIO_PULL_NONE) | |
121 | pup |= (1 << off); | |
122 | else | |
123 | return -EINVAL; | |
124 | ||
125 | __raw_writel(pup, reg); | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static samsung_gpio_pull_t s3c24xx_gpio_getpull_1(struct samsung_gpio_chip *chip, | |
130 | unsigned int off, | |
131 | samsung_gpio_pull_t updown) | |
132 | { | |
133 | void __iomem *reg = chip->base + 0x08; | |
134 | u32 pup = __raw_readl(reg); | |
135 | ||
136 | pup &= (1 << off); | |
137 | return pup ? S3C_GPIO_PULL_NONE : updown; | |
138 | } | |
139 | ||
140 | samsung_gpio_pull_t s3c24xx_gpio_getpull_1up(struct samsung_gpio_chip *chip, | |
141 | unsigned int off) | |
142 | { | |
143 | return s3c24xx_gpio_getpull_1(chip, off, S3C_GPIO_PULL_UP); | |
144 | } | |
145 | ||
146 | int s3c24xx_gpio_setpull_1up(struct samsung_gpio_chip *chip, | |
147 | unsigned int off, samsung_gpio_pull_t pull) | |
148 | { | |
149 | return s3c24xx_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_UP); | |
150 | } | |
151 | ||
152 | samsung_gpio_pull_t s3c24xx_gpio_getpull_1down(struct samsung_gpio_chip *chip, | |
153 | unsigned int off) | |
154 | { | |
155 | return s3c24xx_gpio_getpull_1(chip, off, S3C_GPIO_PULL_DOWN); | |
156 | } | |
157 | ||
158 | int s3c24xx_gpio_setpull_1down(struct samsung_gpio_chip *chip, | |
159 | unsigned int off, samsung_gpio_pull_t pull) | |
160 | { | |
161 | return s3c24xx_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_DOWN); | |
162 | } | |
163 | ||
1b39d5f2 KK |
164 | /* |
165 | * samsung_gpio_setcfg_2bit - Samsung 2bit style GPIO configuration. | |
166 | * @chip: The gpio chip that is being configured. | |
167 | * @off: The offset for the GPIO being configured. | |
168 | * @cfg: The configuration value to set. | |
169 | * | |
170 | * This helper deal with the GPIO cases where the control register | |
171 | * has two bits of configuration per gpio, which have the following | |
172 | * functions: | |
173 | * 00 = input | |
174 | * 01 = output | |
175 | * 1x = special function | |
176 | */ | |
177 | ||
178 | static int samsung_gpio_setcfg_2bit(struct samsung_gpio_chip *chip, | |
179 | unsigned int off, unsigned int cfg) | |
180 | { | |
181 | void __iomem *reg = chip->base; | |
182 | unsigned int shift = off * 2; | |
183 | u32 con; | |
184 | ||
185 | if (samsung_gpio_is_cfg_special(cfg)) { | |
186 | cfg &= 0xf; | |
187 | if (cfg > 3) | |
188 | return -EINVAL; | |
189 | ||
190 | cfg <<= shift; | |
191 | } | |
192 | ||
193 | con = __raw_readl(reg); | |
194 | con &= ~(0x3 << shift); | |
195 | con |= cfg; | |
196 | __raw_writel(con, reg); | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | /* | |
202 | * samsung_gpio_getcfg_2bit - Samsung 2bit style GPIO configuration read. | |
203 | * @chip: The gpio chip that is being configured. | |
204 | * @off: The offset for the GPIO being configured. | |
205 | * | |
f1347599 | 206 | * The reverse of samsung_gpio_setcfg_2bit(). Will return a value which |
1b39d5f2 KK |
207 | * could be directly passed back to samsung_gpio_setcfg_2bit(), from the |
208 | * S3C_GPIO_SPECIAL() macro. | |
209 | */ | |
210 | ||
211 | static unsigned int samsung_gpio_getcfg_2bit(struct samsung_gpio_chip *chip, | |
212 | unsigned int off) | |
213 | { | |
214 | u32 con; | |
215 | ||
216 | con = __raw_readl(chip->base); | |
217 | con >>= off * 2; | |
218 | con &= 3; | |
219 | ||
220 | /* this conversion works for IN and OUT as well as special mode */ | |
221 | return S3C_GPIO_SPECIAL(con); | |
222 | } | |
223 | ||
224 | /* | |
225 | * samsung_gpio_setcfg_4bit - Samsung 4bit single register GPIO config. | |
226 | * @chip: The gpio chip that is being configured. | |
227 | * @off: The offset for the GPIO being configured. | |
228 | * @cfg: The configuration value to set. | |
229 | * | |
230 | * This helper deal with the GPIO cases where the control register has 4 bits | |
231 | * of control per GPIO, generally in the form of: | |
232 | * 0000 = Input | |
233 | * 0001 = Output | |
234 | * others = Special functions (dependent on bank) | |
235 | * | |
236 | * Note, since the code to deal with the case where there are two control | |
237 | * registers instead of one, we do not have a separate set of functions for | |
238 | * each case. | |
239 | */ | |
240 | ||
241 | static int samsung_gpio_setcfg_4bit(struct samsung_gpio_chip *chip, | |
242 | unsigned int off, unsigned int cfg) | |
243 | { | |
244 | void __iomem *reg = chip->base; | |
245 | unsigned int shift = (off & 7) * 4; | |
246 | u32 con; | |
247 | ||
248 | if (off < 8 && chip->chip.ngpio > 8) | |
249 | reg -= 4; | |
250 | ||
251 | if (samsung_gpio_is_cfg_special(cfg)) { | |
252 | cfg &= 0xf; | |
253 | cfg <<= shift; | |
254 | } | |
255 | ||
256 | con = __raw_readl(reg); | |
257 | con &= ~(0xf << shift); | |
258 | con |= cfg; | |
259 | __raw_writel(con, reg); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | /* | |
265 | * samsung_gpio_getcfg_4bit - Samsung 4bit single register GPIO config read. | |
266 | * @chip: The gpio chip that is being configured. | |
267 | * @off: The offset for the GPIO being configured. | |
268 | * | |
269 | * The reverse of samsung_gpio_setcfg_4bit(), turning a gpio configuration | |
270 | * register setting into a value the software can use, such as could be passed | |
271 | * to samsung_gpio_setcfg_4bit(). | |
272 | * | |
273 | * @sa samsung_gpio_getcfg_2bit | |
274 | */ | |
275 | ||
276 | static unsigned samsung_gpio_getcfg_4bit(struct samsung_gpio_chip *chip, | |
277 | unsigned int off) | |
278 | { | |
279 | void __iomem *reg = chip->base; | |
280 | unsigned int shift = (off & 7) * 4; | |
281 | u32 con; | |
282 | ||
283 | if (off < 8 && chip->chip.ngpio > 8) | |
284 | reg -= 4; | |
285 | ||
286 | con = __raw_readl(reg); | |
287 | con >>= shift; | |
288 | con &= 0xf; | |
289 | ||
290 | /* this conversion works for IN and OUT as well as special mode */ | |
291 | return S3C_GPIO_SPECIAL(con); | |
292 | } | |
293 | ||
c034b184 | 294 | #ifdef CONFIG_PLAT_S3C24XX |
1b39d5f2 KK |
295 | /* |
296 | * s3c24xx_gpio_setcfg_abank - S3C24XX style GPIO configuration (Bank A) | |
297 | * @chip: The gpio chip that is being configured. | |
298 | * @off: The offset for the GPIO being configured. | |
299 | * @cfg: The configuration value to set. | |
300 | * | |
301 | * This helper deal with the GPIO cases where the control register | |
302 | * has one bit of configuration for the gpio, where setting the bit | |
303 | * means the pin is in special function mode and unset means output. | |
304 | */ | |
305 | ||
306 | static int s3c24xx_gpio_setcfg_abank(struct samsung_gpio_chip *chip, | |
307 | unsigned int off, unsigned int cfg) | |
308 | { | |
309 | void __iomem *reg = chip->base; | |
310 | unsigned int shift = off; | |
311 | u32 con; | |
312 | ||
313 | if (samsung_gpio_is_cfg_special(cfg)) { | |
314 | cfg &= 0xf; | |
315 | ||
316 | /* Map output to 0, and SFN2 to 1 */ | |
317 | cfg -= 1; | |
318 | if (cfg > 1) | |
319 | return -EINVAL; | |
320 | ||
321 | cfg <<= shift; | |
322 | } | |
323 | ||
324 | con = __raw_readl(reg); | |
325 | con &= ~(0x1 << shift); | |
326 | con |= cfg; | |
327 | __raw_writel(con, reg); | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | /* | |
333 | * s3c24xx_gpio_getcfg_abank - S3C24XX style GPIO configuration read (Bank A) | |
334 | * @chip: The gpio chip that is being configured. | |
335 | * @off: The offset for the GPIO being configured. | |
336 | * | |
337 | * The reverse of s3c24xx_gpio_setcfg_abank() turning an GPIO into a usable | |
338 | * GPIO configuration value. | |
339 | * | |
340 | * @sa samsung_gpio_getcfg_2bit | |
341 | * @sa samsung_gpio_getcfg_4bit | |
342 | */ | |
343 | ||
344 | static unsigned s3c24xx_gpio_getcfg_abank(struct samsung_gpio_chip *chip, | |
345 | unsigned int off) | |
346 | { | |
347 | u32 con; | |
348 | ||
349 | con = __raw_readl(chip->base); | |
350 | con >>= off; | |
351 | con &= 1; | |
352 | con++; | |
353 | ||
354 | return S3C_GPIO_SFN(con); | |
355 | } | |
c034b184 | 356 | #endif |
1b39d5f2 | 357 | |
1b39d5f2 KK |
358 | static void __init samsung_gpiolib_set_cfg(struct samsung_gpio_cfg *chipcfg, |
359 | int nr_chips) | |
360 | { | |
361 | for (; nr_chips > 0; nr_chips--, chipcfg++) { | |
362 | if (!chipcfg->set_config) | |
363 | chipcfg->set_config = samsung_gpio_setcfg_4bit; | |
364 | if (!chipcfg->get_config) | |
365 | chipcfg->get_config = samsung_gpio_getcfg_4bit; | |
366 | if (!chipcfg->set_pull) | |
367 | chipcfg->set_pull = samsung_gpio_setpull_updown; | |
368 | if (!chipcfg->get_pull) | |
369 | chipcfg->get_pull = samsung_gpio_getpull_updown; | |
370 | } | |
371 | } | |
372 | ||
373 | struct samsung_gpio_cfg s3c24xx_gpiocfg_default = { | |
374 | .set_config = samsung_gpio_setcfg_2bit, | |
375 | .get_config = samsung_gpio_getcfg_2bit, | |
376 | }; | |
377 | ||
c034b184 | 378 | #ifdef CONFIG_PLAT_S3C24XX |
1b39d5f2 KK |
379 | static struct samsung_gpio_cfg s3c24xx_gpiocfg_banka = { |
380 | .set_config = s3c24xx_gpio_setcfg_abank, | |
381 | .get_config = s3c24xx_gpio_getcfg_abank, | |
382 | }; | |
c034b184 | 383 | #endif |
1b39d5f2 | 384 | |
1b39d5f2 | 385 | static struct samsung_gpio_cfg samsung_gpio_cfgs[] = { |
2985479f | 386 | [0] = { |
1b39d5f2 | 387 | .cfg_eint = 0x0, |
2985479f MB |
388 | }, |
389 | [1] = { | |
1b39d5f2 | 390 | .cfg_eint = 0x3, |
2985479f MB |
391 | }, |
392 | [2] = { | |
1b39d5f2 | 393 | .cfg_eint = 0x7, |
2985479f MB |
394 | }, |
395 | [3] = { | |
1b39d5f2 | 396 | .cfg_eint = 0xF, |
2985479f MB |
397 | }, |
398 | [4] = { | |
1b39d5f2 KK |
399 | .cfg_eint = 0x0, |
400 | .set_config = samsung_gpio_setcfg_2bit, | |
401 | .get_config = samsung_gpio_getcfg_2bit, | |
2985479f MB |
402 | }, |
403 | [5] = { | |
1b39d5f2 KK |
404 | .cfg_eint = 0x2, |
405 | .set_config = samsung_gpio_setcfg_2bit, | |
406 | .get_config = samsung_gpio_getcfg_2bit, | |
2985479f MB |
407 | }, |
408 | [6] = { | |
1b39d5f2 KK |
409 | .cfg_eint = 0x3, |
410 | .set_config = samsung_gpio_setcfg_2bit, | |
411 | .get_config = samsung_gpio_getcfg_2bit, | |
2985479f MB |
412 | }, |
413 | [7] = { | |
1b39d5f2 KK |
414 | .set_config = samsung_gpio_setcfg_2bit, |
415 | .get_config = samsung_gpio_getcfg_2bit, | |
2985479f | 416 | }, |
1b39d5f2 KK |
417 | }; |
418 | ||
419 | /* | |
420 | * Default routines for controlling GPIO, based on the original S3C24XX | |
421 | * GPIO functions which deal with the case where each gpio bank of the | |
422 | * chip is as following: | |
423 | * | |
424 | * base + 0x00: Control register, 2 bits per gpio | |
425 | * gpio n: 2 bits starting at (2*n) | |
426 | * 00 = input, 01 = output, others mean special-function | |
427 | * base + 0x04: Data register, 1 bit per gpio | |
428 | * bit n: data bit n | |
429 | */ | |
430 | ||
431 | static int samsung_gpiolib_2bit_input(struct gpio_chip *chip, unsigned offset) | |
432 | { | |
433 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
434 | void __iomem *base = ourchip->base; | |
435 | unsigned long flags; | |
436 | unsigned long con; | |
437 | ||
438 | samsung_gpio_lock(ourchip, flags); | |
439 | ||
440 | con = __raw_readl(base + 0x00); | |
441 | con &= ~(3 << (offset * 2)); | |
442 | ||
443 | __raw_writel(con, base + 0x00); | |
444 | ||
445 | samsung_gpio_unlock(ourchip, flags); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | static int samsung_gpiolib_2bit_output(struct gpio_chip *chip, | |
450 | unsigned offset, int value) | |
451 | { | |
452 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
453 | void __iomem *base = ourchip->base; | |
454 | unsigned long flags; | |
455 | unsigned long dat; | |
456 | unsigned long con; | |
457 | ||
458 | samsung_gpio_lock(ourchip, flags); | |
459 | ||
460 | dat = __raw_readl(base + 0x04); | |
461 | dat &= ~(1 << offset); | |
462 | if (value) | |
463 | dat |= 1 << offset; | |
464 | __raw_writel(dat, base + 0x04); | |
465 | ||
466 | con = __raw_readl(base + 0x00); | |
467 | con &= ~(3 << (offset * 2)); | |
468 | con |= 1 << (offset * 2); | |
469 | ||
470 | __raw_writel(con, base + 0x00); | |
471 | __raw_writel(dat, base + 0x04); | |
472 | ||
473 | samsung_gpio_unlock(ourchip, flags); | |
474 | return 0; | |
475 | } | |
476 | ||
477 | /* | |
478 | * The samsung_gpiolib_4bit routines are to control the gpio banks where | |
479 | * the gpio configuration register (GPxCON) has 4 bits per GPIO, as the | |
480 | * following example: | |
481 | * | |
482 | * base + 0x00: Control register, 4 bits per gpio | |
483 | * gpio n: 4 bits starting at (4*n) | |
484 | * 0000 = input, 0001 = output, others mean special-function | |
485 | * base + 0x04: Data register, 1 bit per gpio | |
486 | * bit n: data bit n | |
487 | * | |
488 | * Note, since the data register is one bit per gpio and is at base + 0x4 | |
489 | * we can use samsung_gpiolib_get and samsung_gpiolib_set to change the | |
490 | * state of the output. | |
491 | */ | |
492 | ||
493 | static int samsung_gpiolib_4bit_input(struct gpio_chip *chip, | |
494 | unsigned int offset) | |
495 | { | |
496 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
497 | void __iomem *base = ourchip->base; | |
498 | unsigned long con; | |
499 | ||
500 | con = __raw_readl(base + GPIOCON_OFF); | |
2b88ff4a EK |
501 | if (ourchip->bitmap_gpio_int & BIT(offset)) |
502 | con |= 0xf << con_4bit_shift(offset); | |
503 | else | |
504 | con &= ~(0xf << con_4bit_shift(offset)); | |
1b39d5f2 KK |
505 | __raw_writel(con, base + GPIOCON_OFF); |
506 | ||
343db4bd | 507 | pr_debug("%s: %p: CON now %08lx\n", __func__, base, con); |
1b39d5f2 KK |
508 | |
509 | return 0; | |
510 | } | |
511 | ||
512 | static int samsung_gpiolib_4bit_output(struct gpio_chip *chip, | |
513 | unsigned int offset, int value) | |
514 | { | |
515 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
516 | void __iomem *base = ourchip->base; | |
517 | unsigned long con; | |
518 | unsigned long dat; | |
519 | ||
520 | con = __raw_readl(base + GPIOCON_OFF); | |
521 | con &= ~(0xf << con_4bit_shift(offset)); | |
522 | con |= 0x1 << con_4bit_shift(offset); | |
523 | ||
524 | dat = __raw_readl(base + GPIODAT_OFF); | |
525 | ||
526 | if (value) | |
527 | dat |= 1 << offset; | |
528 | else | |
529 | dat &= ~(1 << offset); | |
530 | ||
531 | __raw_writel(dat, base + GPIODAT_OFF); | |
532 | __raw_writel(con, base + GPIOCON_OFF); | |
533 | __raw_writel(dat, base + GPIODAT_OFF); | |
534 | ||
343db4bd | 535 | pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat); |
1b39d5f2 KK |
536 | |
537 | return 0; | |
538 | } | |
539 | ||
540 | /* | |
541 | * The next set of routines are for the case where the GPIO configuration | |
542 | * registers are 4 bits per GPIO but there is more than one register (the | |
543 | * bank has more than 8 GPIOs. | |
544 | * | |
545 | * This case is the similar to the 4 bit case, but the registers are as | |
546 | * follows: | |
547 | * | |
548 | * base + 0x00: Control register, 4 bits per gpio (lower 8 GPIOs) | |
549 | * gpio n: 4 bits starting at (4*n) | |
550 | * 0000 = input, 0001 = output, others mean special-function | |
551 | * base + 0x04: Control register, 4 bits per gpio (up to 8 additions GPIOs) | |
552 | * gpio n: 4 bits starting at (4*n) | |
553 | * 0000 = input, 0001 = output, others mean special-function | |
554 | * base + 0x08: Data register, 1 bit per gpio | |
555 | * bit n: data bit n | |
556 | * | |
557 | * To allow us to use the samsung_gpiolib_get and samsung_gpiolib_set | |
558 | * routines we store the 'base + 0x4' address so that these routines see | |
559 | * the data register at ourchip->base + 0x04. | |
560 | */ | |
561 | ||
562 | static int samsung_gpiolib_4bit2_input(struct gpio_chip *chip, | |
563 | unsigned int offset) | |
564 | { | |
565 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
566 | void __iomem *base = ourchip->base; | |
567 | void __iomem *regcon = base; | |
568 | unsigned long con; | |
569 | ||
570 | if (offset > 7) | |
571 | offset -= 8; | |
572 | else | |
573 | regcon -= 4; | |
574 | ||
575 | con = __raw_readl(regcon); | |
576 | con &= ~(0xf << con_4bit_shift(offset)); | |
577 | __raw_writel(con, regcon); | |
578 | ||
343db4bd | 579 | pr_debug("%s: %p: CON %08lx\n", __func__, base, con); |
1b39d5f2 KK |
580 | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static int samsung_gpiolib_4bit2_output(struct gpio_chip *chip, | |
585 | unsigned int offset, int value) | |
586 | { | |
587 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
588 | void __iomem *base = ourchip->base; | |
589 | void __iomem *regcon = base; | |
590 | unsigned long con; | |
591 | unsigned long dat; | |
592 | unsigned con_offset = offset; | |
593 | ||
594 | if (con_offset > 7) | |
595 | con_offset -= 8; | |
596 | else | |
597 | regcon -= 4; | |
598 | ||
599 | con = __raw_readl(regcon); | |
600 | con &= ~(0xf << con_4bit_shift(con_offset)); | |
601 | con |= 0x1 << con_4bit_shift(con_offset); | |
602 | ||
603 | dat = __raw_readl(base + GPIODAT_OFF); | |
604 | ||
605 | if (value) | |
606 | dat |= 1 << offset; | |
607 | else | |
608 | dat &= ~(1 << offset); | |
609 | ||
610 | __raw_writel(dat, base + GPIODAT_OFF); | |
611 | __raw_writel(con, regcon); | |
612 | __raw_writel(dat, base + GPIODAT_OFF); | |
613 | ||
343db4bd | 614 | pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat); |
1b39d5f2 KK |
615 | |
616 | return 0; | |
617 | } | |
618 | ||
c034b184 | 619 | #ifdef CONFIG_PLAT_S3C24XX |
1b39d5f2 KK |
620 | /* The next set of routines are for the case of s3c24xx bank a */ |
621 | ||
622 | static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset) | |
623 | { | |
624 | return -EINVAL; | |
625 | } | |
626 | ||
627 | static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip, | |
628 | unsigned offset, int value) | |
629 | { | |
630 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
631 | void __iomem *base = ourchip->base; | |
632 | unsigned long flags; | |
633 | unsigned long dat; | |
634 | unsigned long con; | |
635 | ||
636 | local_irq_save(flags); | |
637 | ||
638 | con = __raw_readl(base + 0x00); | |
639 | dat = __raw_readl(base + 0x04); | |
640 | ||
641 | dat &= ~(1 << offset); | |
642 | if (value) | |
643 | dat |= 1 << offset; | |
644 | ||
645 | __raw_writel(dat, base + 0x04); | |
646 | ||
647 | con &= ~(1 << offset); | |
648 | ||
649 | __raw_writel(con, base + 0x00); | |
650 | __raw_writel(dat, base + 0x04); | |
651 | ||
652 | local_irq_restore(flags); | |
653 | return 0; | |
654 | } | |
c034b184 | 655 | #endif |
1b39d5f2 | 656 | |
1b39d5f2 KK |
657 | static void samsung_gpiolib_set(struct gpio_chip *chip, |
658 | unsigned offset, int value) | |
659 | { | |
660 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
661 | void __iomem *base = ourchip->base; | |
662 | unsigned long flags; | |
663 | unsigned long dat; | |
664 | ||
665 | samsung_gpio_lock(ourchip, flags); | |
666 | ||
667 | dat = __raw_readl(base + 0x04); | |
668 | dat &= ~(1 << offset); | |
669 | if (value) | |
670 | dat |= 1 << offset; | |
671 | __raw_writel(dat, base + 0x04); | |
672 | ||
673 | samsung_gpio_unlock(ourchip, flags); | |
674 | } | |
675 | ||
676 | static int samsung_gpiolib_get(struct gpio_chip *chip, unsigned offset) | |
677 | { | |
678 | struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip); | |
679 | unsigned long val; | |
680 | ||
681 | val = __raw_readl(ourchip->base + 0x04); | |
682 | val >>= offset; | |
683 | val &= 1; | |
684 | ||
685 | return val; | |
686 | } | |
687 | ||
688 | /* | |
689 | * CONFIG_S3C_GPIO_TRACK enables the tracking of the s3c specific gpios | |
690 | * for use with the configuration calls, and other parts of the s3c gpiolib | |
691 | * support code. | |
692 | * | |
693 | * Not all s3c support code will need this, as some configurations of cpu | |
694 | * may only support one or two different configuration options and have an | |
695 | * easy gpio to samsung_gpio_chip mapping function. If this is the case, then | |
696 | * the machine support file should provide its own samsung_gpiolib_getchip() | |
697 | * and any other necessary functions. | |
698 | */ | |
699 | ||
700 | #ifdef CONFIG_S3C_GPIO_TRACK | |
701 | struct samsung_gpio_chip *s3c_gpios[S3C_GPIO_END]; | |
702 | ||
703 | static __init void s3c_gpiolib_track(struct samsung_gpio_chip *chip) | |
704 | { | |
705 | unsigned int gpn; | |
706 | int i; | |
707 | ||
708 | gpn = chip->chip.base; | |
709 | for (i = 0; i < chip->chip.ngpio; i++, gpn++) { | |
710 | BUG_ON(gpn >= ARRAY_SIZE(s3c_gpios)); | |
711 | s3c_gpios[gpn] = chip; | |
712 | } | |
713 | } | |
714 | #endif /* CONFIG_S3C_GPIO_TRACK */ | |
715 | ||
716 | /* | |
717 | * samsung_gpiolib_add() - add the Samsung gpio_chip. | |
718 | * @chip: The chip to register | |
719 | * | |
720 | * This is a wrapper to gpiochip_add() that takes our specific gpio chip | |
721 | * information and makes the necessary alterations for the platform and | |
722 | * notes the information for use with the configuration systems and any | |
723 | * other parts of the system. | |
724 | */ | |
725 | ||
726 | static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip) | |
727 | { | |
728 | struct gpio_chip *gc = &chip->chip; | |
729 | int ret; | |
730 | ||
731 | BUG_ON(!chip->base); | |
732 | BUG_ON(!gc->label); | |
733 | BUG_ON(!gc->ngpio); | |
734 | ||
735 | spin_lock_init(&chip->lock); | |
736 | ||
737 | if (!gc->direction_input) | |
738 | gc->direction_input = samsung_gpiolib_2bit_input; | |
739 | if (!gc->direction_output) | |
740 | gc->direction_output = samsung_gpiolib_2bit_output; | |
741 | if (!gc->set) | |
742 | gc->set = samsung_gpiolib_set; | |
743 | if (!gc->get) | |
744 | gc->get = samsung_gpiolib_get; | |
745 | ||
746 | #ifdef CONFIG_PM | |
747 | if (chip->pm != NULL) { | |
748 | if (!chip->pm->save || !chip->pm->resume) | |
343db4bd | 749 | pr_err("gpio: %s has missing PM functions\n", |
1b39d5f2 KK |
750 | gc->label); |
751 | } else | |
343db4bd | 752 | pr_err("gpio: %s has no PM function\n", gc->label); |
1b39d5f2 KK |
753 | #endif |
754 | ||
755 | /* gpiochip_add() prints own failure message on error. */ | |
756 | ret = gpiochip_add(gc); | |
757 | if (ret >= 0) | |
758 | s3c_gpiolib_track(chip); | |
759 | } | |
760 | ||
761 | static void __init s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip *chip, | |
762 | int nr_chips, void __iomem *base) | |
763 | { | |
764 | int i; | |
765 | struct gpio_chip *gc = &chip->chip; | |
766 | ||
767 | for (i = 0 ; i < nr_chips; i++, chip++) { | |
8a8ab2e6 PK |
768 | /* skip banks not present on SoC */ |
769 | if (chip->chip.base >= S3C_GPIO_END) | |
770 | continue; | |
771 | ||
1b39d5f2 KK |
772 | if (!chip->config) |
773 | chip->config = &s3c24xx_gpiocfg_default; | |
774 | if (!chip->pm) | |
775 | chip->pm = __gpio_pm(&samsung_gpio_pm_2bit); | |
776 | if ((base != NULL) && (chip->base == NULL)) | |
777 | chip->base = base + ((i) * 0x10); | |
778 | ||
779 | if (!gc->direction_input) | |
780 | gc->direction_input = samsung_gpiolib_2bit_input; | |
781 | if (!gc->direction_output) | |
782 | gc->direction_output = samsung_gpiolib_2bit_output; | |
783 | ||
784 | samsung_gpiolib_add(chip); | |
785 | } | |
786 | } | |
787 | ||
788 | static void __init samsung_gpiolib_add_2bit_chips(struct samsung_gpio_chip *chip, | |
789 | int nr_chips, void __iomem *base, | |
790 | unsigned int offset) | |
791 | { | |
792 | int i; | |
793 | ||
794 | for (i = 0 ; i < nr_chips; i++, chip++) { | |
795 | chip->chip.direction_input = samsung_gpiolib_2bit_input; | |
796 | chip->chip.direction_output = samsung_gpiolib_2bit_output; | |
797 | ||
798 | if (!chip->config) | |
799 | chip->config = &samsung_gpio_cfgs[7]; | |
800 | if (!chip->pm) | |
801 | chip->pm = __gpio_pm(&samsung_gpio_pm_2bit); | |
802 | if ((base != NULL) && (chip->base == NULL)) | |
803 | chip->base = base + ((i) * offset); | |
804 | ||
805 | samsung_gpiolib_add(chip); | |
806 | } | |
807 | } | |
808 | ||
809 | /* | |
810 | * samsung_gpiolib_add_4bit_chips - 4bit single register GPIO config. | |
811 | * @chip: The gpio chip that is being configured. | |
812 | * @nr_chips: The no of chips (gpio ports) for the GPIO being configured. | |
813 | * | |
814 | * This helper deal with the GPIO cases where the control register has 4 bits | |
815 | * of control per GPIO, generally in the form of: | |
816 | * 0000 = Input | |
817 | * 0001 = Output | |
818 | * others = Special functions (dependent on bank) | |
819 | * | |
820 | * Note, since the code to deal with the case where there are two control | |
821 | * registers instead of one, we do not have a separate set of function | |
822 | * (samsung_gpiolib_add_4bit2_chips)for each case. | |
823 | */ | |
824 | ||
825 | static void __init samsung_gpiolib_add_4bit_chips(struct samsung_gpio_chip *chip, | |
826 | int nr_chips, void __iomem *base) | |
827 | { | |
828 | int i; | |
829 | ||
830 | for (i = 0 ; i < nr_chips; i++, chip++) { | |
831 | chip->chip.direction_input = samsung_gpiolib_4bit_input; | |
832 | chip->chip.direction_output = samsung_gpiolib_4bit_output; | |
833 | ||
834 | if (!chip->config) | |
835 | chip->config = &samsung_gpio_cfgs[2]; | |
836 | if (!chip->pm) | |
837 | chip->pm = __gpio_pm(&samsung_gpio_pm_4bit); | |
838 | if ((base != NULL) && (chip->base == NULL)) | |
839 | chip->base = base + ((i) * 0x20); | |
840 | ||
2b88ff4a EK |
841 | chip->bitmap_gpio_int = 0; |
842 | ||
1b39d5f2 KK |
843 | samsung_gpiolib_add(chip); |
844 | } | |
845 | } | |
846 | ||
847 | static void __init samsung_gpiolib_add_4bit2_chips(struct samsung_gpio_chip *chip, | |
848 | int nr_chips) | |
849 | { | |
850 | for (; nr_chips > 0; nr_chips--, chip++) { | |
851 | chip->chip.direction_input = samsung_gpiolib_4bit2_input; | |
852 | chip->chip.direction_output = samsung_gpiolib_4bit2_output; | |
853 | ||
854 | if (!chip->config) | |
855 | chip->config = &samsung_gpio_cfgs[2]; | |
856 | if (!chip->pm) | |
857 | chip->pm = __gpio_pm(&samsung_gpio_pm_4bit); | |
858 | ||
859 | samsung_gpiolib_add(chip); | |
860 | } | |
861 | } | |
862 | ||
1b39d5f2 KK |
863 | int samsung_gpiolib_to_irq(struct gpio_chip *chip, unsigned int offset) |
864 | { | |
865 | struct samsung_gpio_chip *samsung_chip = container_of(chip, struct samsung_gpio_chip, chip); | |
866 | ||
867 | return samsung_chip->irq_base + offset; | |
868 | } | |
869 | ||
870 | #ifdef CONFIG_PLAT_S3C24XX | |
871 | static int s3c24xx_gpiolib_fbank_to_irq(struct gpio_chip *chip, unsigned offset) | |
872 | { | |
d97fedef | 873 | if (offset < 4) { |
1c8408e3 HS |
874 | if (soc_is_s3c2412()) |
875 | return IRQ_EINT0_2412 + offset; | |
876 | else | |
877 | return IRQ_EINT0 + offset; | |
d97fedef | 878 | } |
1b39d5f2 KK |
879 | |
880 | if (offset < 8) | |
881 | return IRQ_EINT4 + offset - 4; | |
882 | ||
883 | return -EINVAL; | |
884 | } | |
885 | #endif | |
886 | ||
54362e11 | 887 | #ifdef CONFIG_ARCH_S3C64XX |
1b39d5f2 KK |
888 | static int s3c64xx_gpiolib_mbank_to_irq(struct gpio_chip *chip, unsigned pin) |
889 | { | |
890 | return pin < 5 ? IRQ_EINT(23) + pin : -ENXIO; | |
891 | } | |
892 | ||
893 | static int s3c64xx_gpiolib_lbank_to_irq(struct gpio_chip *chip, unsigned pin) | |
894 | { | |
895 | return pin >= 8 ? IRQ_EINT(16) + pin - 8 : -ENXIO; | |
896 | } | |
897 | #endif | |
898 | ||
899 | struct samsung_gpio_chip s3c24xx_gpios[] = { | |
900 | #ifdef CONFIG_PLAT_S3C24XX | |
901 | { | |
902 | .config = &s3c24xx_gpiocfg_banka, | |
903 | .chip = { | |
904 | .base = S3C2410_GPA(0), | |
905 | .owner = THIS_MODULE, | |
906 | .label = "GPIOA", | |
035b2f7c | 907 | .ngpio = 27, |
1b39d5f2 KK |
908 | .direction_input = s3c24xx_gpiolib_banka_input, |
909 | .direction_output = s3c24xx_gpiolib_banka_output, | |
910 | }, | |
911 | }, { | |
912 | .chip = { | |
913 | .base = S3C2410_GPB(0), | |
914 | .owner = THIS_MODULE, | |
915 | .label = "GPIOB", | |
035b2f7c | 916 | .ngpio = 11, |
1b39d5f2 KK |
917 | }, |
918 | }, { | |
919 | .chip = { | |
920 | .base = S3C2410_GPC(0), | |
921 | .owner = THIS_MODULE, | |
922 | .label = "GPIOC", | |
923 | .ngpio = 16, | |
924 | }, | |
925 | }, { | |
926 | .chip = { | |
927 | .base = S3C2410_GPD(0), | |
928 | .owner = THIS_MODULE, | |
929 | .label = "GPIOD", | |
930 | .ngpio = 16, | |
931 | }, | |
932 | }, { | |
933 | .chip = { | |
934 | .base = S3C2410_GPE(0), | |
935 | .label = "GPIOE", | |
936 | .owner = THIS_MODULE, | |
937 | .ngpio = 16, | |
938 | }, | |
939 | }, { | |
940 | .chip = { | |
941 | .base = S3C2410_GPF(0), | |
942 | .owner = THIS_MODULE, | |
943 | .label = "GPIOF", | |
944 | .ngpio = 8, | |
945 | .to_irq = s3c24xx_gpiolib_fbank_to_irq, | |
946 | }, | |
947 | }, { | |
948 | .irq_base = IRQ_EINT8, | |
949 | .chip = { | |
950 | .base = S3C2410_GPG(0), | |
951 | .owner = THIS_MODULE, | |
952 | .label = "GPIOG", | |
953 | .ngpio = 16, | |
954 | .to_irq = samsung_gpiolib_to_irq, | |
955 | }, | |
956 | }, { | |
957 | .chip = { | |
958 | .base = S3C2410_GPH(0), | |
959 | .owner = THIS_MODULE, | |
960 | .label = "GPIOH", | |
035b2f7c | 961 | .ngpio = 15, |
1b39d5f2 KK |
962 | }, |
963 | }, | |
964 | /* GPIOS for the S3C2443 and later devices. */ | |
965 | { | |
966 | .base = S3C2440_GPJCON, | |
967 | .chip = { | |
968 | .base = S3C2410_GPJ(0), | |
969 | .owner = THIS_MODULE, | |
970 | .label = "GPIOJ", | |
971 | .ngpio = 16, | |
972 | }, | |
973 | }, { | |
974 | .base = S3C2443_GPKCON, | |
975 | .chip = { | |
976 | .base = S3C2410_GPK(0), | |
977 | .owner = THIS_MODULE, | |
978 | .label = "GPIOK", | |
979 | .ngpio = 16, | |
980 | }, | |
981 | }, { | |
982 | .base = S3C2443_GPLCON, | |
983 | .chip = { | |
984 | .base = S3C2410_GPL(0), | |
985 | .owner = THIS_MODULE, | |
986 | .label = "GPIOL", | |
987 | .ngpio = 15, | |
988 | }, | |
989 | }, { | |
990 | .base = S3C2443_GPMCON, | |
991 | .chip = { | |
992 | .base = S3C2410_GPM(0), | |
993 | .owner = THIS_MODULE, | |
994 | .label = "GPIOM", | |
995 | .ngpio = 2, | |
996 | }, | |
997 | }, | |
998 | #endif | |
999 | }; | |
1000 | ||
1001 | /* | |
1002 | * GPIO bank summary: | |
1003 | * | |
1004 | * Bank GPIOs Style SlpCon ExtInt Group | |
1005 | * A 8 4Bit Yes 1 | |
1006 | * B 7 4Bit Yes 1 | |
1007 | * C 8 4Bit Yes 2 | |
1008 | * D 5 4Bit Yes 3 | |
1009 | * E 5 4Bit Yes None | |
1010 | * F 16 2Bit Yes 4 [1] | |
1011 | * G 7 4Bit Yes 5 | |
1012 | * H 10 4Bit[2] Yes 6 | |
1013 | * I 16 2Bit Yes None | |
1014 | * J 12 2Bit Yes None | |
1015 | * K 16 4Bit[2] No None | |
1016 | * L 15 4Bit[2] No None | |
1017 | * M 6 4Bit No IRQ_EINT | |
1018 | * N 16 2Bit No IRQ_EINT | |
1019 | * O 16 2Bit Yes 7 | |
1020 | * P 15 2Bit Yes 8 | |
1021 | * Q 9 2Bit Yes 9 | |
1022 | * | |
1023 | * [1] BANKF pins 14,15 do not form part of the external interrupt sources | |
1024 | * [2] BANK has two control registers, GPxCON0 and GPxCON1 | |
1025 | */ | |
1026 | ||
1027 | static struct samsung_gpio_chip s3c64xx_gpios_4bit[] = { | |
54362e11 | 1028 | #ifdef CONFIG_ARCH_S3C64XX |
1b39d5f2 KK |
1029 | { |
1030 | .chip = { | |
1031 | .base = S3C64XX_GPA(0), | |
1032 | .ngpio = S3C64XX_GPIO_A_NR, | |
1033 | .label = "GPA", | |
1034 | }, | |
1035 | }, { | |
1036 | .chip = { | |
1037 | .base = S3C64XX_GPB(0), | |
1038 | .ngpio = S3C64XX_GPIO_B_NR, | |
1039 | .label = "GPB", | |
1040 | }, | |
1041 | }, { | |
1042 | .chip = { | |
1043 | .base = S3C64XX_GPC(0), | |
1044 | .ngpio = S3C64XX_GPIO_C_NR, | |
1045 | .label = "GPC", | |
1046 | }, | |
1047 | }, { | |
1048 | .chip = { | |
1049 | .base = S3C64XX_GPD(0), | |
1050 | .ngpio = S3C64XX_GPIO_D_NR, | |
1051 | .label = "GPD", | |
1052 | }, | |
1053 | }, { | |
1054 | .config = &samsung_gpio_cfgs[0], | |
1055 | .chip = { | |
1056 | .base = S3C64XX_GPE(0), | |
1057 | .ngpio = S3C64XX_GPIO_E_NR, | |
1058 | .label = "GPE", | |
1059 | }, | |
1060 | }, { | |
1061 | .base = S3C64XX_GPG_BASE, | |
1062 | .chip = { | |
1063 | .base = S3C64XX_GPG(0), | |
1064 | .ngpio = S3C64XX_GPIO_G_NR, | |
1065 | .label = "GPG", | |
1066 | }, | |
1067 | }, { | |
1068 | .base = S3C64XX_GPM_BASE, | |
1069 | .config = &samsung_gpio_cfgs[1], | |
1070 | .chip = { | |
1071 | .base = S3C64XX_GPM(0), | |
1072 | .ngpio = S3C64XX_GPIO_M_NR, | |
1073 | .label = "GPM", | |
1074 | .to_irq = s3c64xx_gpiolib_mbank_to_irq, | |
1075 | }, | |
1076 | }, | |
1077 | #endif | |
1078 | }; | |
1079 | ||
1080 | static struct samsung_gpio_chip s3c64xx_gpios_4bit2[] = { | |
54362e11 | 1081 | #ifdef CONFIG_ARCH_S3C64XX |
1b39d5f2 KK |
1082 | { |
1083 | .base = S3C64XX_GPH_BASE + 0x4, | |
1084 | .chip = { | |
1085 | .base = S3C64XX_GPH(0), | |
1086 | .ngpio = S3C64XX_GPIO_H_NR, | |
1087 | .label = "GPH", | |
1088 | }, | |
1089 | }, { | |
1090 | .base = S3C64XX_GPK_BASE + 0x4, | |
1091 | .config = &samsung_gpio_cfgs[0], | |
1092 | .chip = { | |
1093 | .base = S3C64XX_GPK(0), | |
1094 | .ngpio = S3C64XX_GPIO_K_NR, | |
1095 | .label = "GPK", | |
1096 | }, | |
1097 | }, { | |
1098 | .base = S3C64XX_GPL_BASE + 0x4, | |
1099 | .config = &samsung_gpio_cfgs[1], | |
1100 | .chip = { | |
1101 | .base = S3C64XX_GPL(0), | |
1102 | .ngpio = S3C64XX_GPIO_L_NR, | |
1103 | .label = "GPL", | |
1104 | .to_irq = s3c64xx_gpiolib_lbank_to_irq, | |
1105 | }, | |
1106 | }, | |
1107 | #endif | |
1108 | }; | |
1109 | ||
1110 | static struct samsung_gpio_chip s3c64xx_gpios_2bit[] = { | |
54362e11 | 1111 | #ifdef CONFIG_ARCH_S3C64XX |
1b39d5f2 KK |
1112 | { |
1113 | .base = S3C64XX_GPF_BASE, | |
1114 | .config = &samsung_gpio_cfgs[6], | |
1115 | .chip = { | |
1116 | .base = S3C64XX_GPF(0), | |
1117 | .ngpio = S3C64XX_GPIO_F_NR, | |
1118 | .label = "GPF", | |
1119 | }, | |
1120 | }, { | |
1121 | .config = &samsung_gpio_cfgs[7], | |
1122 | .chip = { | |
1123 | .base = S3C64XX_GPI(0), | |
1124 | .ngpio = S3C64XX_GPIO_I_NR, | |
1125 | .label = "GPI", | |
1126 | }, | |
1127 | }, { | |
1128 | .config = &samsung_gpio_cfgs[7], | |
1129 | .chip = { | |
1130 | .base = S3C64XX_GPJ(0), | |
1131 | .ngpio = S3C64XX_GPIO_J_NR, | |
1132 | .label = "GPJ", | |
1133 | }, | |
1134 | }, { | |
1135 | .config = &samsung_gpio_cfgs[6], | |
1136 | .chip = { | |
1137 | .base = S3C64XX_GPO(0), | |
1138 | .ngpio = S3C64XX_GPIO_O_NR, | |
1139 | .label = "GPO", | |
1140 | }, | |
1141 | }, { | |
1142 | .config = &samsung_gpio_cfgs[6], | |
1143 | .chip = { | |
1144 | .base = S3C64XX_GPP(0), | |
1145 | .ngpio = S3C64XX_GPIO_P_NR, | |
1146 | .label = "GPP", | |
1147 | }, | |
1148 | }, { | |
1149 | .config = &samsung_gpio_cfgs[6], | |
1150 | .chip = { | |
1151 | .base = S3C64XX_GPQ(0), | |
1152 | .ngpio = S3C64XX_GPIO_Q_NR, | |
1153 | .label = "GPQ", | |
1154 | }, | |
1155 | }, { | |
1156 | .base = S3C64XX_GPN_BASE, | |
1157 | .irq_base = IRQ_EINT(0), | |
1158 | .config = &samsung_gpio_cfgs[5], | |
1159 | .chip = { | |
1160 | .base = S3C64XX_GPN(0), | |
1161 | .ngpio = S3C64XX_GPIO_N_NR, | |
1162 | .label = "GPN", | |
1163 | .to_irq = samsung_gpiolib_to_irq, | |
1164 | }, | |
1165 | }, | |
1166 | #endif | |
1167 | }; | |
1168 | ||
1b39d5f2 KK |
1169 | /* TODO: cleanup soc_is_* */ |
1170 | static __init int samsung_gpiolib_init(void) | |
1171 | { | |
ba51bdd3 | 1172 | /* |
608f9737 TF |
1173 | * Currently there are two drivers that can provide GPIO support for |
1174 | * Samsung SoCs. For device tree enabled platforms, the new | |
1175 | * pinctrl-samsung driver is used, providing both GPIO and pin control | |
1176 | * interfaces. For legacy (non-DT) platforms this driver is used. | |
1177 | */ | |
1178 | if (of_have_populated_dt()) | |
1179 | return -ENODEV; | |
ba51bdd3 | 1180 | |
1b39d5f2 KK |
1181 | samsung_gpiolib_set_cfg(samsung_gpio_cfgs, ARRAY_SIZE(samsung_gpio_cfgs)); |
1182 | ||
1183 | if (soc_is_s3c24xx()) { | |
1184 | s3c24xx_gpiolib_add_chips(s3c24xx_gpios, | |
1185 | ARRAY_SIZE(s3c24xx_gpios), S3C24XX_VA_GPIO); | |
1186 | } else if (soc_is_s3c64xx()) { | |
1187 | samsung_gpiolib_add_2bit_chips(s3c64xx_gpios_2bit, | |
1188 | ARRAY_SIZE(s3c64xx_gpios_2bit), | |
1189 | S3C64XX_VA_GPIO + 0xE0, 0x20); | |
1190 | samsung_gpiolib_add_4bit_chips(s3c64xx_gpios_4bit, | |
1191 | ARRAY_SIZE(s3c64xx_gpios_4bit), | |
1192 | S3C64XX_VA_GPIO); | |
1193 | samsung_gpiolib_add_4bit2_chips(s3c64xx_gpios_4bit2, | |
1194 | ARRAY_SIZE(s3c64xx_gpios_4bit2)); | |
fbe92fcc MB |
1195 | } else { |
1196 | WARN(1, "Unknown SoC in gpio-samsung, no GPIOs added\n"); | |
1197 | return -ENODEV; | |
1b39d5f2 KK |
1198 | } |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | core_initcall(samsung_gpiolib_init); | |
1203 | ||
1204 | int s3c_gpio_cfgpin(unsigned int pin, unsigned int config) | |
1205 | { | |
1206 | struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin); | |
1207 | unsigned long flags; | |
1208 | int offset; | |
1209 | int ret; | |
1210 | ||
1211 | if (!chip) | |
1212 | return -EINVAL; | |
1213 | ||
1214 | offset = pin - chip->chip.base; | |
1215 | ||
1216 | samsung_gpio_lock(chip, flags); | |
1217 | ret = samsung_gpio_do_setcfg(chip, offset, config); | |
1218 | samsung_gpio_unlock(chip, flags); | |
1219 | ||
1220 | return ret; | |
1221 | } | |
1222 | EXPORT_SYMBOL(s3c_gpio_cfgpin); | |
1223 | ||
1224 | int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr, | |
1225 | unsigned int cfg) | |
1226 | { | |
1227 | int ret; | |
1228 | ||
1229 | for (; nr > 0; nr--, start++) { | |
1230 | ret = s3c_gpio_cfgpin(start, cfg); | |
1231 | if (ret != 0) | |
1232 | return ret; | |
1233 | } | |
1234 | ||
1235 | return 0; | |
1236 | } | |
1237 | EXPORT_SYMBOL_GPL(s3c_gpio_cfgpin_range); | |
1238 | ||
1239 | int s3c_gpio_cfgall_range(unsigned int start, unsigned int nr, | |
1240 | unsigned int cfg, samsung_gpio_pull_t pull) | |
1241 | { | |
1242 | int ret; | |
1243 | ||
1244 | for (; nr > 0; nr--, start++) { | |
1245 | s3c_gpio_setpull(start, pull); | |
1246 | ret = s3c_gpio_cfgpin(start, cfg); | |
1247 | if (ret != 0) | |
1248 | return ret; | |
1249 | } | |
1250 | ||
1251 | return 0; | |
1252 | } | |
1253 | EXPORT_SYMBOL_GPL(s3c_gpio_cfgall_range); | |
1254 | ||
1255 | unsigned s3c_gpio_getcfg(unsigned int pin) | |
1256 | { | |
1257 | struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin); | |
1258 | unsigned long flags; | |
1259 | unsigned ret = 0; | |
1260 | int offset; | |
1261 | ||
1262 | if (chip) { | |
1263 | offset = pin - chip->chip.base; | |
1264 | ||
1265 | samsung_gpio_lock(chip, flags); | |
1266 | ret = samsung_gpio_do_getcfg(chip, offset); | |
1267 | samsung_gpio_unlock(chip, flags); | |
1268 | } | |
1269 | ||
1270 | return ret; | |
1271 | } | |
1272 | EXPORT_SYMBOL(s3c_gpio_getcfg); | |
1273 | ||
1274 | int s3c_gpio_setpull(unsigned int pin, samsung_gpio_pull_t pull) | |
1275 | { | |
1276 | struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin); | |
1277 | unsigned long flags; | |
1278 | int offset, ret; | |
1279 | ||
1280 | if (!chip) | |
1281 | return -EINVAL; | |
1282 | ||
1283 | offset = pin - chip->chip.base; | |
1284 | ||
1285 | samsung_gpio_lock(chip, flags); | |
1286 | ret = samsung_gpio_do_setpull(chip, offset, pull); | |
1287 | samsung_gpio_unlock(chip, flags); | |
1288 | ||
1289 | return ret; | |
1290 | } | |
1291 | EXPORT_SYMBOL(s3c_gpio_setpull); | |
1292 | ||
1293 | samsung_gpio_pull_t s3c_gpio_getpull(unsigned int pin) | |
1294 | { | |
1295 | struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin); | |
1296 | unsigned long flags; | |
1297 | int offset; | |
1298 | u32 pup = 0; | |
1299 | ||
1300 | if (chip) { | |
1301 | offset = pin - chip->chip.base; | |
1302 | ||
1303 | samsung_gpio_lock(chip, flags); | |
1304 | pup = samsung_gpio_do_getpull(chip, offset); | |
1305 | samsung_gpio_unlock(chip, flags); | |
1306 | } | |
1307 | ||
1308 | return (__force samsung_gpio_pull_t)pup; | |
1309 | } | |
1310 | EXPORT_SYMBOL(s3c_gpio_getpull); | |
1311 | ||
1b39d5f2 KK |
1312 | #ifdef CONFIG_PLAT_S3C24XX |
1313 | unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change) | |
1314 | { | |
1315 | unsigned long flags; | |
1316 | unsigned long misccr; | |
1317 | ||
1318 | local_irq_save(flags); | |
1319 | misccr = __raw_readl(S3C24XX_MISCCR); | |
1320 | misccr &= ~clear; | |
1321 | misccr ^= change; | |
1322 | __raw_writel(misccr, S3C24XX_MISCCR); | |
1323 | local_irq_restore(flags); | |
1324 | ||
1325 | return misccr; | |
1326 | } | |
1327 | EXPORT_SYMBOL(s3c2410_modify_misccr); | |
1328 | #endif |