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Commit | Line | Data |
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9e60fdcf | 1 | /* |
c103de24 | 2 | * PCA953x 4/8/16 bit I/O ports |
9e60fdcf | 3 | * |
4 | * Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com> | |
5 | * Copyright (C) 2007 Marvell International Ltd. | |
6 | * | |
7 | * Derived from drivers/i2c/chips/pca9539.c | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; version 2 of the License. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
d120c17f | 16 | #include <linux/gpio.h> |
89ea8bbe MZ |
17 | #include <linux/interrupt.h> |
18 | #include <linux/irq.h> | |
55ecd263 | 19 | #include <linux/irqdomain.h> |
9e60fdcf | 20 | #include <linux/i2c.h> |
5877457a | 21 | #include <linux/platform_data/pca953x.h> |
5a0e3ad6 | 22 | #include <linux/slab.h> |
1965d303 NC |
23 | #ifdef CONFIG_OF_GPIO |
24 | #include <linux/of_platform.h> | |
1965d303 | 25 | #endif |
9e60fdcf | 26 | |
33226ffd HZ |
27 | #define PCA953X_INPUT 0 |
28 | #define PCA953X_OUTPUT 1 | |
29 | #define PCA953X_INVERT 2 | |
30 | #define PCA953X_DIRECTION 3 | |
31 | ||
ae79c190 AS |
32 | #define REG_ADDR_AI 0x80 |
33 | ||
33226ffd HZ |
34 | #define PCA957X_IN 0 |
35 | #define PCA957X_INVRT 1 | |
36 | #define PCA957X_BKEN 2 | |
37 | #define PCA957X_PUPD 3 | |
38 | #define PCA957X_CFG 4 | |
39 | #define PCA957X_OUT 5 | |
40 | #define PCA957X_MSK 6 | |
41 | #define PCA957X_INTS 7 | |
42 | ||
43 | #define PCA_GPIO_MASK 0x00FF | |
44 | #define PCA_INT 0x0100 | |
45 | #define PCA953X_TYPE 0x1000 | |
46 | #define PCA957X_TYPE 0x2000 | |
89ea8bbe | 47 | |
3760f736 | 48 | static const struct i2c_device_id pca953x_id[] = { |
89f5df01 | 49 | { "pca9505", 40 | PCA953X_TYPE | PCA_INT, }, |
33226ffd HZ |
50 | { "pca9534", 8 | PCA953X_TYPE | PCA_INT, }, |
51 | { "pca9535", 16 | PCA953X_TYPE | PCA_INT, }, | |
52 | { "pca9536", 4 | PCA953X_TYPE, }, | |
53 | { "pca9537", 4 | PCA953X_TYPE | PCA_INT, }, | |
54 | { "pca9538", 8 | PCA953X_TYPE | PCA_INT, }, | |
55 | { "pca9539", 16 | PCA953X_TYPE | PCA_INT, }, | |
56 | { "pca9554", 8 | PCA953X_TYPE | PCA_INT, }, | |
57 | { "pca9555", 16 | PCA953X_TYPE | PCA_INT, }, | |
58 | { "pca9556", 8 | PCA953X_TYPE, }, | |
59 | { "pca9557", 8 | PCA953X_TYPE, }, | |
60 | { "pca9574", 8 | PCA957X_TYPE | PCA_INT, }, | |
61 | { "pca9575", 16 | PCA957X_TYPE | PCA_INT, }, | |
62 | ||
63 | { "max7310", 8 | PCA953X_TYPE, }, | |
64 | { "max7312", 16 | PCA953X_TYPE | PCA_INT, }, | |
65 | { "max7313", 16 | PCA953X_TYPE | PCA_INT, }, | |
66 | { "max7315", 8 | PCA953X_TYPE | PCA_INT, }, | |
67 | { "pca6107", 8 | PCA953X_TYPE | PCA_INT, }, | |
68 | { "tca6408", 8 | PCA953X_TYPE | PCA_INT, }, | |
69 | { "tca6416", 16 | PCA953X_TYPE | PCA_INT, }, | |
ae79c190 | 70 | { "tca6424", 24 | PCA953X_TYPE | PCA_INT, }, |
3760f736 | 71 | { } |
f5e8ff48 | 72 | }; |
3760f736 | 73 | MODULE_DEVICE_TABLE(i2c, pca953x_id); |
9e60fdcf | 74 | |
f5f0b7aa GC |
75 | #define MAX_BANK 5 |
76 | #define BANK_SZ 8 | |
77 | ||
78 | #define NBANK(chip) (chip->gpio_chip.ngpio / BANK_SZ) | |
79 | ||
f3dc3630 | 80 | struct pca953x_chip { |
9e60fdcf | 81 | unsigned gpio_start; |
f5f0b7aa GC |
82 | u8 reg_output[MAX_BANK]; |
83 | u8 reg_direction[MAX_BANK]; | |
6e20fb18 | 84 | struct mutex i2c_lock; |
9e60fdcf | 85 | |
89ea8bbe MZ |
86 | #ifdef CONFIG_GPIO_PCA953X_IRQ |
87 | struct mutex irq_lock; | |
f5f0b7aa GC |
88 | u8 irq_mask[MAX_BANK]; |
89 | u8 irq_stat[MAX_BANK]; | |
90 | u8 irq_trig_raise[MAX_BANK]; | |
91 | u8 irq_trig_fall[MAX_BANK]; | |
55ecd263 | 92 | struct irq_domain *domain; |
89ea8bbe MZ |
93 | #endif |
94 | ||
9e60fdcf | 95 | struct i2c_client *client; |
96 | struct gpio_chip gpio_chip; | |
62154991 | 97 | const char *const *names; |
33226ffd | 98 | int chip_type; |
9e60fdcf | 99 | }; |
100 | ||
f5f0b7aa GC |
101 | static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val, |
102 | int off) | |
103 | { | |
104 | int ret; | |
105 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); | |
106 | int offset = off / BANK_SZ; | |
107 | ||
108 | ret = i2c_smbus_read_byte_data(chip->client, | |
109 | (reg << bank_shift) + offset); | |
110 | *val = ret; | |
111 | ||
112 | if (ret < 0) { | |
113 | dev_err(&chip->client->dev, "failed reading register\n"); | |
114 | return ret; | |
115 | } | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | static int pca953x_write_single(struct pca953x_chip *chip, int reg, u32 val, | |
121 | int off) | |
122 | { | |
123 | int ret = 0; | |
124 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); | |
125 | int offset = off / BANK_SZ; | |
126 | ||
127 | ret = i2c_smbus_write_byte_data(chip->client, | |
128 | (reg << bank_shift) + offset, val); | |
129 | ||
130 | if (ret < 0) { | |
131 | dev_err(&chip->client->dev, "failed writing register\n"); | |
132 | return ret; | |
133 | } | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val) | |
9e60fdcf | 139 | { |
33226ffd | 140 | int ret = 0; |
f5e8ff48 GL |
141 | |
142 | if (chip->gpio_chip.ngpio <= 8) | |
f5f0b7aa GC |
143 | ret = i2c_smbus_write_byte_data(chip->client, reg, *val); |
144 | else if (chip->gpio_chip.ngpio >= 24) { | |
145 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); | |
96b70641 | 146 | ret = i2c_smbus_write_i2c_block_data(chip->client, |
f5f0b7aa GC |
147 | (reg << bank_shift) | REG_ADDR_AI, |
148 | NBANK(chip), val); | |
50e44430 | 149 | } else { |
33226ffd HZ |
150 | switch (chip->chip_type) { |
151 | case PCA953X_TYPE: | |
152 | ret = i2c_smbus_write_word_data(chip->client, | |
f5f0b7aa | 153 | reg << 1, (u16) *val); |
33226ffd HZ |
154 | break; |
155 | case PCA957X_TYPE: | |
156 | ret = i2c_smbus_write_byte_data(chip->client, reg << 1, | |
f5f0b7aa | 157 | val[0]); |
33226ffd HZ |
158 | if (ret < 0) |
159 | break; | |
160 | ret = i2c_smbus_write_byte_data(chip->client, | |
161 | (reg << 1) + 1, | |
f5f0b7aa | 162 | val[1]); |
33226ffd HZ |
163 | break; |
164 | } | |
165 | } | |
f5e8ff48 GL |
166 | |
167 | if (ret < 0) { | |
168 | dev_err(&chip->client->dev, "failed writing register\n"); | |
ab5dc372 | 169 | return ret; |
f5e8ff48 GL |
170 | } |
171 | ||
172 | return 0; | |
9e60fdcf | 173 | } |
174 | ||
f5f0b7aa | 175 | static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val) |
9e60fdcf | 176 | { |
177 | int ret; | |
178 | ||
96b70641 | 179 | if (chip->gpio_chip.ngpio <= 8) { |
f5e8ff48 | 180 | ret = i2c_smbus_read_byte_data(chip->client, reg); |
96b70641 | 181 | *val = ret; |
f5f0b7aa GC |
182 | } else if (chip->gpio_chip.ngpio >= 24) { |
183 | int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ); | |
184 | ||
96b70641 | 185 | ret = i2c_smbus_read_i2c_block_data(chip->client, |
f5f0b7aa GC |
186 | (reg << bank_shift) | REG_ADDR_AI, |
187 | NBANK(chip), val); | |
96b70641 | 188 | } else { |
f5e8ff48 | 189 | ret = i2c_smbus_read_word_data(chip->client, reg << 1); |
f5f0b7aa GC |
190 | val[0] = (u16)ret & 0xFF; |
191 | val[1] = (u16)ret >> 8; | |
96b70641 | 192 | } |
9e60fdcf | 193 | if (ret < 0) { |
194 | dev_err(&chip->client->dev, "failed reading register\n"); | |
ab5dc372 | 195 | return ret; |
9e60fdcf | 196 | } |
197 | ||
9e60fdcf | 198 | return 0; |
199 | } | |
200 | ||
f3dc3630 | 201 | static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off) |
9e60fdcf | 202 | { |
f3dc3630 | 203 | struct pca953x_chip *chip; |
f5f0b7aa | 204 | u8 reg_val; |
33226ffd | 205 | int ret, offset = 0; |
9e60fdcf | 206 | |
f3dc3630 | 207 | chip = container_of(gc, struct pca953x_chip, gpio_chip); |
9e60fdcf | 208 | |
6e20fb18 | 209 | mutex_lock(&chip->i2c_lock); |
f5f0b7aa | 210 | reg_val = chip->reg_direction[off / BANK_SZ] | (1u << (off % BANK_SZ)); |
33226ffd HZ |
211 | |
212 | switch (chip->chip_type) { | |
213 | case PCA953X_TYPE: | |
214 | offset = PCA953X_DIRECTION; | |
215 | break; | |
216 | case PCA957X_TYPE: | |
217 | offset = PCA957X_CFG; | |
218 | break; | |
219 | } | |
f5f0b7aa | 220 | ret = pca953x_write_single(chip, offset, reg_val, off); |
9e60fdcf | 221 | if (ret) |
6e20fb18 | 222 | goto exit; |
9e60fdcf | 223 | |
f5f0b7aa | 224 | chip->reg_direction[off / BANK_SZ] = reg_val; |
6e20fb18 RS |
225 | ret = 0; |
226 | exit: | |
227 | mutex_unlock(&chip->i2c_lock); | |
228 | return ret; | |
9e60fdcf | 229 | } |
230 | ||
f3dc3630 | 231 | static int pca953x_gpio_direction_output(struct gpio_chip *gc, |
9e60fdcf | 232 | unsigned off, int val) |
233 | { | |
f3dc3630 | 234 | struct pca953x_chip *chip; |
f5f0b7aa | 235 | u8 reg_val; |
33226ffd | 236 | int ret, offset = 0; |
9e60fdcf | 237 | |
f3dc3630 | 238 | chip = container_of(gc, struct pca953x_chip, gpio_chip); |
9e60fdcf | 239 | |
6e20fb18 | 240 | mutex_lock(&chip->i2c_lock); |
9e60fdcf | 241 | /* set output level */ |
242 | if (val) | |
f5f0b7aa GC |
243 | reg_val = chip->reg_output[off / BANK_SZ] |
244 | | (1u << (off % BANK_SZ)); | |
9e60fdcf | 245 | else |
f5f0b7aa GC |
246 | reg_val = chip->reg_output[off / BANK_SZ] |
247 | & ~(1u << (off % BANK_SZ)); | |
9e60fdcf | 248 | |
33226ffd HZ |
249 | switch (chip->chip_type) { |
250 | case PCA953X_TYPE: | |
251 | offset = PCA953X_OUTPUT; | |
252 | break; | |
253 | case PCA957X_TYPE: | |
254 | offset = PCA957X_OUT; | |
255 | break; | |
256 | } | |
f5f0b7aa | 257 | ret = pca953x_write_single(chip, offset, reg_val, off); |
9e60fdcf | 258 | if (ret) |
6e20fb18 | 259 | goto exit; |
9e60fdcf | 260 | |
f5f0b7aa | 261 | chip->reg_output[off / BANK_SZ] = reg_val; |
9e60fdcf | 262 | |
263 | /* then direction */ | |
f5f0b7aa | 264 | reg_val = chip->reg_direction[off / BANK_SZ] & ~(1u << (off % BANK_SZ)); |
33226ffd HZ |
265 | switch (chip->chip_type) { |
266 | case PCA953X_TYPE: | |
267 | offset = PCA953X_DIRECTION; | |
268 | break; | |
269 | case PCA957X_TYPE: | |
270 | offset = PCA957X_CFG; | |
271 | break; | |
272 | } | |
f5f0b7aa | 273 | ret = pca953x_write_single(chip, offset, reg_val, off); |
9e60fdcf | 274 | if (ret) |
6e20fb18 | 275 | goto exit; |
9e60fdcf | 276 | |
f5f0b7aa | 277 | chip->reg_direction[off / BANK_SZ] = reg_val; |
6e20fb18 RS |
278 | ret = 0; |
279 | exit: | |
280 | mutex_unlock(&chip->i2c_lock); | |
281 | return ret; | |
9e60fdcf | 282 | } |
283 | ||
f3dc3630 | 284 | static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off) |
9e60fdcf | 285 | { |
f3dc3630 | 286 | struct pca953x_chip *chip; |
ae79c190 | 287 | u32 reg_val; |
33226ffd | 288 | int ret, offset = 0; |
9e60fdcf | 289 | |
f3dc3630 | 290 | chip = container_of(gc, struct pca953x_chip, gpio_chip); |
9e60fdcf | 291 | |
6e20fb18 | 292 | mutex_lock(&chip->i2c_lock); |
33226ffd HZ |
293 | switch (chip->chip_type) { |
294 | case PCA953X_TYPE: | |
295 | offset = PCA953X_INPUT; | |
296 | break; | |
297 | case PCA957X_TYPE: | |
298 | offset = PCA957X_IN; | |
299 | break; | |
300 | } | |
f5f0b7aa | 301 | ret = pca953x_read_single(chip, offset, ®_val, off); |
6e20fb18 | 302 | mutex_unlock(&chip->i2c_lock); |
9e60fdcf | 303 | if (ret < 0) { |
304 | /* NOTE: diagnostic already emitted; that's all we should | |
305 | * do unless gpio_*_value_cansleep() calls become different | |
306 | * from their nonsleeping siblings (and report faults). | |
307 | */ | |
308 | return 0; | |
309 | } | |
310 | ||
40a625da | 311 | return (reg_val & (1u << (off % BANK_SZ))) ? 1 : 0; |
9e60fdcf | 312 | } |
313 | ||
f3dc3630 | 314 | static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val) |
9e60fdcf | 315 | { |
f3dc3630 | 316 | struct pca953x_chip *chip; |
f5f0b7aa | 317 | u8 reg_val; |
33226ffd | 318 | int ret, offset = 0; |
9e60fdcf | 319 | |
f3dc3630 | 320 | chip = container_of(gc, struct pca953x_chip, gpio_chip); |
9e60fdcf | 321 | |
6e20fb18 | 322 | mutex_lock(&chip->i2c_lock); |
9e60fdcf | 323 | if (val) |
f5f0b7aa GC |
324 | reg_val = chip->reg_output[off / BANK_SZ] |
325 | | (1u << (off % BANK_SZ)); | |
9e60fdcf | 326 | else |
f5f0b7aa GC |
327 | reg_val = chip->reg_output[off / BANK_SZ] |
328 | & ~(1u << (off % BANK_SZ)); | |
9e60fdcf | 329 | |
33226ffd HZ |
330 | switch (chip->chip_type) { |
331 | case PCA953X_TYPE: | |
332 | offset = PCA953X_OUTPUT; | |
333 | break; | |
334 | case PCA957X_TYPE: | |
335 | offset = PCA957X_OUT; | |
336 | break; | |
337 | } | |
f5f0b7aa | 338 | ret = pca953x_write_single(chip, offset, reg_val, off); |
9e60fdcf | 339 | if (ret) |
6e20fb18 | 340 | goto exit; |
9e60fdcf | 341 | |
f5f0b7aa | 342 | chip->reg_output[off / BANK_SZ] = reg_val; |
6e20fb18 RS |
343 | exit: |
344 | mutex_unlock(&chip->i2c_lock); | |
9e60fdcf | 345 | } |
346 | ||
f5e8ff48 | 347 | static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios) |
9e60fdcf | 348 | { |
349 | struct gpio_chip *gc; | |
350 | ||
351 | gc = &chip->gpio_chip; | |
352 | ||
f3dc3630 GL |
353 | gc->direction_input = pca953x_gpio_direction_input; |
354 | gc->direction_output = pca953x_gpio_direction_output; | |
355 | gc->get = pca953x_gpio_get_value; | |
356 | gc->set = pca953x_gpio_set_value; | |
84207805 | 357 | gc->can_sleep = 1; |
9e60fdcf | 358 | |
359 | gc->base = chip->gpio_start; | |
f5e8ff48 GL |
360 | gc->ngpio = gpios; |
361 | gc->label = chip->client->name; | |
d8f388d8 | 362 | gc->dev = &chip->client->dev; |
d72cbed0 | 363 | gc->owner = THIS_MODULE; |
77906a54 | 364 | gc->names = chip->names; |
9e60fdcf | 365 | } |
366 | ||
89ea8bbe MZ |
367 | #ifdef CONFIG_GPIO_PCA953X_IRQ |
368 | static int pca953x_gpio_to_irq(struct gpio_chip *gc, unsigned off) | |
369 | { | |
370 | struct pca953x_chip *chip; | |
371 | ||
372 | chip = container_of(gc, struct pca953x_chip, gpio_chip); | |
0e8f2fda | 373 | return irq_create_mapping(chip->domain, off); |
89ea8bbe MZ |
374 | } |
375 | ||
6f5cfc0e | 376 | static void pca953x_irq_mask(struct irq_data *d) |
89ea8bbe | 377 | { |
6f5cfc0e | 378 | struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); |
89ea8bbe | 379 | |
f5f0b7aa | 380 | chip->irq_mask[d->hwirq / BANK_SZ] &= ~(1 << (d->hwirq % BANK_SZ)); |
89ea8bbe MZ |
381 | } |
382 | ||
6f5cfc0e | 383 | static void pca953x_irq_unmask(struct irq_data *d) |
89ea8bbe | 384 | { |
6f5cfc0e | 385 | struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); |
89ea8bbe | 386 | |
f5f0b7aa | 387 | chip->irq_mask[d->hwirq / BANK_SZ] |= 1 << (d->hwirq % BANK_SZ); |
89ea8bbe MZ |
388 | } |
389 | ||
6f5cfc0e | 390 | static void pca953x_irq_bus_lock(struct irq_data *d) |
89ea8bbe | 391 | { |
6f5cfc0e | 392 | struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); |
89ea8bbe MZ |
393 | |
394 | mutex_lock(&chip->irq_lock); | |
395 | } | |
396 | ||
6f5cfc0e | 397 | static void pca953x_irq_bus_sync_unlock(struct irq_data *d) |
89ea8bbe | 398 | { |
6f5cfc0e | 399 | struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); |
f5f0b7aa GC |
400 | u8 new_irqs; |
401 | int level, i; | |
a2cb9aeb MZ |
402 | |
403 | /* Look for any newly setup interrupt */ | |
f5f0b7aa GC |
404 | for (i = 0; i < NBANK(chip); i++) { |
405 | new_irqs = chip->irq_trig_fall[i] | chip->irq_trig_raise[i]; | |
406 | new_irqs &= ~chip->reg_direction[i]; | |
407 | ||
408 | while (new_irqs) { | |
409 | level = __ffs(new_irqs); | |
410 | pca953x_gpio_direction_input(&chip->gpio_chip, | |
411 | level + (BANK_SZ * i)); | |
412 | new_irqs &= ~(1 << level); | |
413 | } | |
a2cb9aeb | 414 | } |
89ea8bbe MZ |
415 | |
416 | mutex_unlock(&chip->irq_lock); | |
417 | } | |
418 | ||
6f5cfc0e | 419 | static int pca953x_irq_set_type(struct irq_data *d, unsigned int type) |
89ea8bbe | 420 | { |
6f5cfc0e | 421 | struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); |
f5f0b7aa GC |
422 | int bank_nb = d->hwirq / BANK_SZ; |
423 | u8 mask = 1 << (d->hwirq % BANK_SZ); | |
89ea8bbe MZ |
424 | |
425 | if (!(type & IRQ_TYPE_EDGE_BOTH)) { | |
426 | dev_err(&chip->client->dev, "irq %d: unsupported type %d\n", | |
6f5cfc0e | 427 | d->irq, type); |
89ea8bbe MZ |
428 | return -EINVAL; |
429 | } | |
430 | ||
431 | if (type & IRQ_TYPE_EDGE_FALLING) | |
f5f0b7aa | 432 | chip->irq_trig_fall[bank_nb] |= mask; |
89ea8bbe | 433 | else |
f5f0b7aa | 434 | chip->irq_trig_fall[bank_nb] &= ~mask; |
89ea8bbe MZ |
435 | |
436 | if (type & IRQ_TYPE_EDGE_RISING) | |
f5f0b7aa | 437 | chip->irq_trig_raise[bank_nb] |= mask; |
89ea8bbe | 438 | else |
f5f0b7aa | 439 | chip->irq_trig_raise[bank_nb] &= ~mask; |
89ea8bbe | 440 | |
a2cb9aeb | 441 | return 0; |
89ea8bbe MZ |
442 | } |
443 | ||
444 | static struct irq_chip pca953x_irq_chip = { | |
445 | .name = "pca953x", | |
6f5cfc0e LB |
446 | .irq_mask = pca953x_irq_mask, |
447 | .irq_unmask = pca953x_irq_unmask, | |
448 | .irq_bus_lock = pca953x_irq_bus_lock, | |
449 | .irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock, | |
450 | .irq_set_type = pca953x_irq_set_type, | |
89ea8bbe MZ |
451 | }; |
452 | ||
f5f0b7aa | 453 | static u8 pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending) |
89ea8bbe | 454 | { |
f5f0b7aa GC |
455 | u8 cur_stat[MAX_BANK]; |
456 | u8 old_stat[MAX_BANK]; | |
457 | u8 pendings = 0; | |
458 | u8 trigger[MAX_BANK], triggers = 0; | |
459 | int ret, i, offset = 0; | |
33226ffd HZ |
460 | |
461 | switch (chip->chip_type) { | |
462 | case PCA953X_TYPE: | |
463 | offset = PCA953X_INPUT; | |
464 | break; | |
465 | case PCA957X_TYPE: | |
466 | offset = PCA957X_IN; | |
467 | break; | |
468 | } | |
f5f0b7aa | 469 | ret = pca953x_read_regs(chip, offset, cur_stat); |
89ea8bbe MZ |
470 | if (ret) |
471 | return 0; | |
472 | ||
473 | /* Remove output pins from the equation */ | |
f5f0b7aa GC |
474 | for (i = 0; i < NBANK(chip); i++) |
475 | cur_stat[i] &= chip->reg_direction[i]; | |
89ea8bbe | 476 | |
f5f0b7aa | 477 | memcpy(old_stat, chip->irq_stat, NBANK(chip)); |
89ea8bbe | 478 | |
f5f0b7aa GC |
479 | for (i = 0; i < NBANK(chip); i++) { |
480 | trigger[i] = (cur_stat[i] ^ old_stat[i]) & chip->irq_mask[i]; | |
481 | triggers += trigger[i]; | |
482 | } | |
483 | ||
484 | if (!triggers) | |
89ea8bbe MZ |
485 | return 0; |
486 | ||
f5f0b7aa | 487 | memcpy(chip->irq_stat, cur_stat, NBANK(chip)); |
89ea8bbe | 488 | |
f5f0b7aa GC |
489 | for (i = 0; i < NBANK(chip); i++) { |
490 | pending[i] = (old_stat[i] & chip->irq_trig_fall[i]) | | |
491 | (cur_stat[i] & chip->irq_trig_raise[i]); | |
492 | pending[i] &= trigger[i]; | |
493 | pendings += pending[i]; | |
494 | } | |
89ea8bbe | 495 | |
f5f0b7aa | 496 | return pendings; |
89ea8bbe MZ |
497 | } |
498 | ||
499 | static irqreturn_t pca953x_irq_handler(int irq, void *devid) | |
500 | { | |
501 | struct pca953x_chip *chip = devid; | |
f5f0b7aa GC |
502 | u8 pending[MAX_BANK]; |
503 | u8 level; | |
504 | int i; | |
89ea8bbe | 505 | |
f5f0b7aa | 506 | if (!pca953x_irq_pending(chip, pending)) |
89ea8bbe MZ |
507 | return IRQ_HANDLED; |
508 | ||
f5f0b7aa GC |
509 | for (i = 0; i < NBANK(chip); i++) { |
510 | while (pending[i]) { | |
511 | level = __ffs(pending[i]); | |
512 | handle_nested_irq(irq_find_mapping(chip->domain, | |
513 | level + (BANK_SZ * i))); | |
514 | pending[i] &= ~(1 << level); | |
515 | } | |
516 | } | |
89ea8bbe MZ |
517 | |
518 | return IRQ_HANDLED; | |
519 | } | |
520 | ||
0e8f2fda GC |
521 | static int pca953x_gpio_irq_map(struct irq_domain *d, unsigned int irq, |
522 | irq_hw_number_t hwirq) | |
523 | { | |
524 | irq_clear_status_flags(irq, IRQ_NOREQUEST); | |
525 | irq_set_chip_data(irq, d->host_data); | |
526 | irq_set_chip(irq, &pca953x_irq_chip); | |
527 | irq_set_nested_thread(irq, true); | |
528 | #ifdef CONFIG_ARM | |
529 | set_irq_flags(irq, IRQF_VALID); | |
530 | #else | |
531 | irq_set_noprobe(irq); | |
532 | #endif | |
533 | ||
534 | return 0; | |
535 | } | |
536 | ||
537 | static const struct irq_domain_ops pca953x_irq_simple_ops = { | |
538 | .map = pca953x_gpio_irq_map, | |
539 | .xlate = irq_domain_xlate_twocell, | |
540 | }; | |
541 | ||
89ea8bbe | 542 | static int pca953x_irq_setup(struct pca953x_chip *chip, |
c6dcf592 DJ |
543 | const struct i2c_device_id *id, |
544 | int irq_base) | |
89ea8bbe MZ |
545 | { |
546 | struct i2c_client *client = chip->client; | |
f5f0b7aa | 547 | int ret, i, offset = 0; |
89ea8bbe | 548 | |
c6dcf592 | 549 | if (irq_base != -1 |
33226ffd | 550 | && (id->driver_data & PCA_INT)) { |
89ea8bbe | 551 | |
33226ffd HZ |
552 | switch (chip->chip_type) { |
553 | case PCA953X_TYPE: | |
554 | offset = PCA953X_INPUT; | |
555 | break; | |
556 | case PCA957X_TYPE: | |
557 | offset = PCA957X_IN; | |
558 | break; | |
559 | } | |
f5f0b7aa | 560 | ret = pca953x_read_regs(chip, offset, chip->irq_stat); |
89ea8bbe | 561 | if (ret) |
b42748c9 | 562 | return ret; |
89ea8bbe MZ |
563 | |
564 | /* | |
565 | * There is no way to know which GPIO line generated the | |
566 | * interrupt. We have to rely on the previous read for | |
567 | * this purpose. | |
568 | */ | |
f5f0b7aa GC |
569 | for (i = 0; i < NBANK(chip); i++) |
570 | chip->irq_stat[i] &= chip->reg_direction[i]; | |
89ea8bbe MZ |
571 | mutex_init(&chip->irq_lock); |
572 | ||
0e8f2fda | 573 | chip->domain = irq_domain_add_simple(client->dev.of_node, |
55ecd263 | 574 | chip->gpio_chip.ngpio, |
0e8f2fda GC |
575 | irq_base, |
576 | &pca953x_irq_simple_ops, | |
e7a7f972 | 577 | chip); |
0e8f2fda GC |
578 | if (!chip->domain) |
579 | return -ENODEV; | |
89ea8bbe | 580 | |
b42748c9 LW |
581 | ret = devm_request_threaded_irq(&client->dev, |
582 | client->irq, | |
89ea8bbe MZ |
583 | NULL, |
584 | pca953x_irq_handler, | |
17e8b42c | 585 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, |
89ea8bbe MZ |
586 | dev_name(&client->dev), chip); |
587 | if (ret) { | |
588 | dev_err(&client->dev, "failed to request irq %d\n", | |
589 | client->irq); | |
0e8f2fda | 590 | return ret; |
89ea8bbe MZ |
591 | } |
592 | ||
593 | chip->gpio_chip.to_irq = pca953x_gpio_to_irq; | |
594 | } | |
595 | ||
596 | return 0; | |
89ea8bbe MZ |
597 | } |
598 | ||
89ea8bbe MZ |
599 | #else /* CONFIG_GPIO_PCA953X_IRQ */ |
600 | static int pca953x_irq_setup(struct pca953x_chip *chip, | |
c6dcf592 DJ |
601 | const struct i2c_device_id *id, |
602 | int irq_base) | |
89ea8bbe MZ |
603 | { |
604 | struct i2c_client *client = chip->client; | |
89ea8bbe | 605 | |
c6dcf592 | 606 | if (irq_base != -1 && (id->driver_data & PCA_INT)) |
89ea8bbe MZ |
607 | dev_warn(&client->dev, "interrupt support not compiled in\n"); |
608 | ||
609 | return 0; | |
610 | } | |
89ea8bbe MZ |
611 | #endif |
612 | ||
1965d303 NC |
613 | /* |
614 | * Handlers for alternative sources of platform_data | |
615 | */ | |
616 | #ifdef CONFIG_OF_GPIO | |
617 | /* | |
618 | * Translate OpenFirmware node properties into platform_data | |
a57339b4 | 619 | * WARNING: This is DEPRECATED and will be removed eventually! |
1965d303 | 620 | */ |
404ba2b8 | 621 | static void |
6a7b36aa | 622 | pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert) |
1965d303 | 623 | { |
1965d303 | 624 | struct device_node *node; |
1648237d DE |
625 | const __be32 *val; |
626 | int size; | |
1965d303 | 627 | |
61c7a080 | 628 | node = client->dev.of_node; |
1965d303 | 629 | if (node == NULL) |
c6dcf592 | 630 | return; |
1965d303 | 631 | |
c6dcf592 | 632 | *gpio_base = -1; |
1648237d | 633 | val = of_get_property(node, "linux,gpio-base", &size); |
a57339b4 | 634 | WARN(val, "%s: device-tree property 'linux,gpio-base' is deprecated!", __func__); |
1965d303 | 635 | if (val) { |
1648237d DE |
636 | if (size != sizeof(*val)) |
637 | dev_warn(&client->dev, "%s: wrong linux,gpio-base\n", | |
638 | node->full_name); | |
1965d303 | 639 | else |
c6dcf592 | 640 | *gpio_base = be32_to_cpup(val); |
1965d303 NC |
641 | } |
642 | ||
643 | val = of_get_property(node, "polarity", NULL); | |
a57339b4 | 644 | WARN(val, "%s: device-tree property 'polarity' is deprecated!", __func__); |
1965d303 | 645 | if (val) |
c6dcf592 | 646 | *invert = *val; |
1965d303 NC |
647 | } |
648 | #else | |
404ba2b8 | 649 | static void |
6a7b36aa | 650 | pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert) |
1965d303 | 651 | { |
25fcf2b7 | 652 | *gpio_base = -1; |
1965d303 NC |
653 | } |
654 | #endif | |
655 | ||
3836309d | 656 | static int device_pca953x_init(struct pca953x_chip *chip, u32 invert) |
33226ffd HZ |
657 | { |
658 | int ret; | |
f5f0b7aa | 659 | u8 val[MAX_BANK]; |
33226ffd | 660 | |
f5f0b7aa | 661 | ret = pca953x_read_regs(chip, PCA953X_OUTPUT, chip->reg_output); |
33226ffd HZ |
662 | if (ret) |
663 | goto out; | |
664 | ||
f5f0b7aa GC |
665 | ret = pca953x_read_regs(chip, PCA953X_DIRECTION, |
666 | chip->reg_direction); | |
33226ffd HZ |
667 | if (ret) |
668 | goto out; | |
669 | ||
670 | /* set platform specific polarity inversion */ | |
f5f0b7aa GC |
671 | if (invert) |
672 | memset(val, 0xFF, NBANK(chip)); | |
673 | else | |
674 | memset(val, 0, NBANK(chip)); | |
675 | ||
676 | ret = pca953x_write_regs(chip, PCA953X_INVERT, val); | |
33226ffd HZ |
677 | out: |
678 | return ret; | |
679 | } | |
680 | ||
3836309d | 681 | static int device_pca957x_init(struct pca953x_chip *chip, u32 invert) |
33226ffd HZ |
682 | { |
683 | int ret; | |
f5f0b7aa | 684 | u8 val[MAX_BANK]; |
33226ffd HZ |
685 | |
686 | /* Let every port in proper state, that could save power */ | |
f5f0b7aa GC |
687 | memset(val, 0, NBANK(chip)); |
688 | pca953x_write_regs(chip, PCA957X_PUPD, val); | |
689 | memset(val, 0xFF, NBANK(chip)); | |
690 | pca953x_write_regs(chip, PCA957X_CFG, val); | |
691 | memset(val, 0, NBANK(chip)); | |
692 | pca953x_write_regs(chip, PCA957X_OUT, val); | |
693 | ||
694 | ret = pca953x_read_regs(chip, PCA957X_IN, val); | |
33226ffd HZ |
695 | if (ret) |
696 | goto out; | |
f5f0b7aa | 697 | ret = pca953x_read_regs(chip, PCA957X_OUT, chip->reg_output); |
33226ffd HZ |
698 | if (ret) |
699 | goto out; | |
f5f0b7aa | 700 | ret = pca953x_read_regs(chip, PCA957X_CFG, chip->reg_direction); |
33226ffd HZ |
701 | if (ret) |
702 | goto out; | |
703 | ||
704 | /* set platform specific polarity inversion */ | |
f5f0b7aa GC |
705 | if (invert) |
706 | memset(val, 0xFF, NBANK(chip)); | |
707 | else | |
708 | memset(val, 0, NBANK(chip)); | |
709 | pca953x_write_regs(chip, PCA957X_INVRT, val); | |
33226ffd HZ |
710 | |
711 | /* To enable register 6, 7 to controll pull up and pull down */ | |
f5f0b7aa GC |
712 | memset(val, 0x02, NBANK(chip)); |
713 | pca953x_write_regs(chip, PCA957X_BKEN, val); | |
33226ffd HZ |
714 | |
715 | return 0; | |
716 | out: | |
717 | return ret; | |
718 | } | |
719 | ||
3836309d | 720 | static int pca953x_probe(struct i2c_client *client, |
3760f736 | 721 | const struct i2c_device_id *id) |
9e60fdcf | 722 | { |
f3dc3630 GL |
723 | struct pca953x_platform_data *pdata; |
724 | struct pca953x_chip *chip; | |
6a7b36aa | 725 | int irq_base = 0; |
7ea2aa20 | 726 | int ret; |
6a7b36aa | 727 | u32 invert = 0; |
9e60fdcf | 728 | |
b42748c9 LW |
729 | chip = devm_kzalloc(&client->dev, |
730 | sizeof(struct pca953x_chip), GFP_KERNEL); | |
1965d303 NC |
731 | if (chip == NULL) |
732 | return -ENOMEM; | |
733 | ||
e56aee18 | 734 | pdata = dev_get_platdata(&client->dev); |
c6dcf592 DJ |
735 | if (pdata) { |
736 | irq_base = pdata->irq_base; | |
737 | chip->gpio_start = pdata->gpio_base; | |
738 | invert = pdata->invert; | |
739 | chip->names = pdata->names; | |
740 | } else { | |
741 | pca953x_get_alt_pdata(client, &chip->gpio_start, &invert); | |
a57339b4 DJ |
742 | #ifdef CONFIG_OF_GPIO |
743 | /* If I2C node has no interrupts property, disable GPIO interrupts */ | |
744 | if (of_find_property(client->dev.of_node, "interrupts", NULL) == NULL) | |
745 | irq_base = -1; | |
746 | #endif | |
1965d303 | 747 | } |
9e60fdcf | 748 | |
749 | chip->client = client; | |
750 | ||
33226ffd | 751 | chip->chip_type = id->driver_data & (PCA953X_TYPE | PCA957X_TYPE); |
77906a54 | 752 | |
6e20fb18 RS |
753 | mutex_init(&chip->i2c_lock); |
754 | ||
9e60fdcf | 755 | /* initialize cached registers from their original values. |
756 | * we can't share this chip with another i2c master. | |
757 | */ | |
33226ffd | 758 | pca953x_setup_gpio(chip, id->driver_data & PCA_GPIO_MASK); |
f5e8ff48 | 759 | |
33226ffd | 760 | if (chip->chip_type == PCA953X_TYPE) |
7ea2aa20 | 761 | ret = device_pca953x_init(chip, invert); |
33226ffd | 762 | else |
7ea2aa20 WS |
763 | ret = device_pca957x_init(chip, invert); |
764 | if (ret) | |
b42748c9 | 765 | return ret; |
9e60fdcf | 766 | |
c6dcf592 | 767 | ret = pca953x_irq_setup(chip, id, irq_base); |
89ea8bbe | 768 | if (ret) |
b42748c9 | 769 | return ret; |
f5e8ff48 GL |
770 | |
771 | ret = gpiochip_add(&chip->gpio_chip); | |
9e60fdcf | 772 | if (ret) |
b42748c9 | 773 | return ret; |
9e60fdcf | 774 | |
c6dcf592 | 775 | if (pdata && pdata->setup) { |
9e60fdcf | 776 | ret = pdata->setup(client, chip->gpio_chip.base, |
777 | chip->gpio_chip.ngpio, pdata->context); | |
778 | if (ret < 0) | |
779 | dev_warn(&client->dev, "setup failed, %d\n", ret); | |
780 | } | |
781 | ||
782 | i2c_set_clientdata(client, chip); | |
783 | return 0; | |
9e60fdcf | 784 | } |
785 | ||
f3dc3630 | 786 | static int pca953x_remove(struct i2c_client *client) |
9e60fdcf | 787 | { |
e56aee18 | 788 | struct pca953x_platform_data *pdata = dev_get_platdata(&client->dev); |
f3dc3630 | 789 | struct pca953x_chip *chip = i2c_get_clientdata(client); |
9e60fdcf | 790 | int ret = 0; |
791 | ||
c6dcf592 | 792 | if (pdata && pdata->teardown) { |
9e60fdcf | 793 | ret = pdata->teardown(client, chip->gpio_chip.base, |
794 | chip->gpio_chip.ngpio, pdata->context); | |
795 | if (ret < 0) { | |
796 | dev_err(&client->dev, "%s failed, %d\n", | |
797 | "teardown", ret); | |
798 | return ret; | |
799 | } | |
800 | } | |
801 | ||
802 | ret = gpiochip_remove(&chip->gpio_chip); | |
803 | if (ret) { | |
804 | dev_err(&client->dev, "%s failed, %d\n", | |
805 | "gpiochip_remove()", ret); | |
806 | return ret; | |
807 | } | |
808 | ||
9e60fdcf | 809 | return 0; |
810 | } | |
811 | ||
ed32620e | 812 | static const struct of_device_id pca953x_dt_ids[] = { |
89f5df01 | 813 | { .compatible = "nxp,pca9505", }, |
ed32620e MR |
814 | { .compatible = "nxp,pca9534", }, |
815 | { .compatible = "nxp,pca9535", }, | |
816 | { .compatible = "nxp,pca9536", }, | |
817 | { .compatible = "nxp,pca9537", }, | |
818 | { .compatible = "nxp,pca9538", }, | |
819 | { .compatible = "nxp,pca9539", }, | |
820 | { .compatible = "nxp,pca9554", }, | |
821 | { .compatible = "nxp,pca9555", }, | |
822 | { .compatible = "nxp,pca9556", }, | |
823 | { .compatible = "nxp,pca9557", }, | |
824 | { .compatible = "nxp,pca9574", }, | |
825 | { .compatible = "nxp,pca9575", }, | |
826 | ||
827 | { .compatible = "maxim,max7310", }, | |
828 | { .compatible = "maxim,max7312", }, | |
829 | { .compatible = "maxim,max7313", }, | |
830 | { .compatible = "maxim,max7315", }, | |
831 | ||
832 | { .compatible = "ti,pca6107", }, | |
833 | { .compatible = "ti,tca6408", }, | |
834 | { .compatible = "ti,tca6416", }, | |
835 | { .compatible = "ti,tca6424", }, | |
836 | { } | |
837 | }; | |
838 | ||
839 | MODULE_DEVICE_TABLE(of, pca953x_dt_ids); | |
840 | ||
f3dc3630 | 841 | static struct i2c_driver pca953x_driver = { |
9e60fdcf | 842 | .driver = { |
f3dc3630 | 843 | .name = "pca953x", |
ed32620e | 844 | .of_match_table = pca953x_dt_ids, |
9e60fdcf | 845 | }, |
f3dc3630 GL |
846 | .probe = pca953x_probe, |
847 | .remove = pca953x_remove, | |
3760f736 | 848 | .id_table = pca953x_id, |
9e60fdcf | 849 | }; |
850 | ||
f3dc3630 | 851 | static int __init pca953x_init(void) |
9e60fdcf | 852 | { |
f3dc3630 | 853 | return i2c_add_driver(&pca953x_driver); |
9e60fdcf | 854 | } |
2f8d1197 DB |
855 | /* register after i2c postcore initcall and before |
856 | * subsys initcalls that may rely on these GPIOs | |
857 | */ | |
858 | subsys_initcall(pca953x_init); | |
9e60fdcf | 859 | |
f3dc3630 | 860 | static void __exit pca953x_exit(void) |
9e60fdcf | 861 | { |
f3dc3630 | 862 | i2c_del_driver(&pca953x_driver); |
9e60fdcf | 863 | } |
f3dc3630 | 864 | module_exit(pca953x_exit); |
9e60fdcf | 865 | |
866 | MODULE_AUTHOR("eric miao <eric.miao@marvell.com>"); | |
f3dc3630 | 867 | MODULE_DESCRIPTION("GPIO expander driver for PCA953x"); |
9e60fdcf | 868 | MODULE_LICENSE("GPL"); |