2 * GPIO driver for Fintek Super-I/O F71869, F71869A, F71882, F71889 and F81866
4 * Copyright (C) 2010-2013 LaCie
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/platform_device.h>
18 #include <linux/gpio/driver.h>
19 #include <linux/bitops.h>
21 #define DRVNAME "gpio-f7188x"
26 #define SIO_LDSEL 0x07 /* Logical device select */
27 #define SIO_DEVID 0x20 /* Device ID (2 bytes) */
28 #define SIO_DEVREV 0x22 /* Device revision */
29 #define SIO_MANID 0x23 /* Fintek ID (2 bytes) */
31 #define SIO_LD_GPIO 0x06 /* GPIO logical device */
32 #define SIO_UNLOCK_KEY 0x87 /* Key to enable Super-I/O */
33 #define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
35 #define SIO_FINTEK_ID 0x1934 /* Manufacturer ID */
36 #define SIO_F71869_ID 0x0814 /* F71869 chipset ID */
37 #define SIO_F71869A_ID 0x1007 /* F71869A chipset ID */
38 #define SIO_F71882_ID 0x0541 /* F71882 chipset ID */
39 #define SIO_F71889_ID 0x0909 /* F71889 chipset ID */
40 #define SIO_F71889A_ID 0x1005 /* F71889A chipset ID */
41 #define SIO_F81866_ID 0x1010 /* F81866 chipset ID */
42 #define SIO_F81804_ID 0x1502 /* F81804 chipset ID, same for f81966 */
45 enum chips { f71869, f71869a, f71882fg, f71889a, f71889f, f81866, f81804 };
47 static const char * const f7188x_names[] = {
62 struct f7188x_gpio_bank {
63 struct gpio_chip chip;
65 struct f7188x_gpio_data *data;
68 struct f7188x_gpio_data {
69 struct f7188x_sio *sio;
71 struct f7188x_gpio_bank *bank;
75 * Super-I/O functions.
78 static inline int superio_inb(int base, int reg)
84 static int superio_inw(int base, int reg)
89 val = inb(base + 1) << 8;
96 static inline void superio_outb(int base, int reg, int val)
102 static inline int superio_enter(int base)
104 /* Don't step on other drivers' I/O space by accident. */
105 if (!request_muxed_region(base, 2, DRVNAME)) {
106 pr_err(DRVNAME "I/O address 0x%04x already in use\n", base);
110 /* According to the datasheet the key must be send twice. */
111 outb(SIO_UNLOCK_KEY, base);
112 outb(SIO_UNLOCK_KEY, base);
117 static inline void superio_select(int base, int ld)
119 outb(SIO_LDSEL, base);
123 static inline void superio_exit(int base)
125 outb(SIO_LOCK_KEY, base);
126 release_region(base, 2);
133 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset);
134 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
135 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
136 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
137 unsigned offset, int value);
138 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
139 static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
140 unsigned long config);
142 #define F7188X_GPIO_BANK(_base, _ngpio, _regbase) \
146 .owner = THIS_MODULE, \
147 .get_direction = f7188x_gpio_get_direction, \
148 .direction_input = f7188x_gpio_direction_in, \
149 .get = f7188x_gpio_get, \
150 .direction_output = f7188x_gpio_direction_out, \
151 .set = f7188x_gpio_set, \
152 .set_config = f7188x_gpio_set_config, \
157 .regbase = _regbase, \
160 #define gpio_dir(base) (base + 0)
161 #define gpio_data_out(base) (base + 1)
162 #define gpio_data_in(base) (base + 2)
163 /* Output mode register (0:open drain 1:push-pull). */
164 #define gpio_out_mode(base) (base + 3)
166 static struct f7188x_gpio_bank f71869_gpio_bank[] = {
167 F7188X_GPIO_BANK(0, 6, 0xF0),
168 F7188X_GPIO_BANK(10, 8, 0xE0),
169 F7188X_GPIO_BANK(20, 8, 0xD0),
170 F7188X_GPIO_BANK(30, 8, 0xC0),
171 F7188X_GPIO_BANK(40, 8, 0xB0),
172 F7188X_GPIO_BANK(50, 5, 0xA0),
173 F7188X_GPIO_BANK(60, 6, 0x90),
176 static struct f7188x_gpio_bank f71869a_gpio_bank[] = {
177 F7188X_GPIO_BANK(0, 6, 0xF0),
178 F7188X_GPIO_BANK(10, 8, 0xE0),
179 F7188X_GPIO_BANK(20, 8, 0xD0),
180 F7188X_GPIO_BANK(30, 8, 0xC0),
181 F7188X_GPIO_BANK(40, 8, 0xB0),
182 F7188X_GPIO_BANK(50, 5, 0xA0),
183 F7188X_GPIO_BANK(60, 8, 0x90),
184 F7188X_GPIO_BANK(70, 8, 0x80),
187 static struct f7188x_gpio_bank f71882_gpio_bank[] = {
188 F7188X_GPIO_BANK(0, 8, 0xF0),
189 F7188X_GPIO_BANK(10, 8, 0xE0),
190 F7188X_GPIO_BANK(20, 8, 0xD0),
191 F7188X_GPIO_BANK(30, 4, 0xC0),
192 F7188X_GPIO_BANK(40, 4, 0xB0),
195 static struct f7188x_gpio_bank f71889a_gpio_bank[] = {
196 F7188X_GPIO_BANK(0, 7, 0xF0),
197 F7188X_GPIO_BANK(10, 7, 0xE0),
198 F7188X_GPIO_BANK(20, 8, 0xD0),
199 F7188X_GPIO_BANK(30, 8, 0xC0),
200 F7188X_GPIO_BANK(40, 8, 0xB0),
201 F7188X_GPIO_BANK(50, 5, 0xA0),
202 F7188X_GPIO_BANK(60, 8, 0x90),
203 F7188X_GPIO_BANK(70, 8, 0x80),
206 static struct f7188x_gpio_bank f71889_gpio_bank[] = {
207 F7188X_GPIO_BANK(0, 7, 0xF0),
208 F7188X_GPIO_BANK(10, 7, 0xE0),
209 F7188X_GPIO_BANK(20, 8, 0xD0),
210 F7188X_GPIO_BANK(30, 8, 0xC0),
211 F7188X_GPIO_BANK(40, 8, 0xB0),
212 F7188X_GPIO_BANK(50, 5, 0xA0),
213 F7188X_GPIO_BANK(60, 8, 0x90),
214 F7188X_GPIO_BANK(70, 8, 0x80),
217 static struct f7188x_gpio_bank f81866_gpio_bank[] = {
218 F7188X_GPIO_BANK(0, 8, 0xF0),
219 F7188X_GPIO_BANK(10, 8, 0xE0),
220 F7188X_GPIO_BANK(20, 8, 0xD0),
221 F7188X_GPIO_BANK(30, 8, 0xC0),
222 F7188X_GPIO_BANK(40, 8, 0xB0),
223 F7188X_GPIO_BANK(50, 8, 0xA0),
224 F7188X_GPIO_BANK(60, 8, 0x90),
225 F7188X_GPIO_BANK(70, 8, 0x80),
226 F7188X_GPIO_BANK(80, 8, 0x88),
230 static struct f7188x_gpio_bank f81804_gpio_bank[] = {
231 F7188X_GPIO_BANK(0, 8, 0xF0),
232 F7188X_GPIO_BANK(10, 8, 0xE0),
233 F7188X_GPIO_BANK(20, 8, 0xD0),
234 F7188X_GPIO_BANK(50, 8, 0xA0),
235 F7188X_GPIO_BANK(60, 8, 0x90),
236 F7188X_GPIO_BANK(70, 8, 0x80),
237 F7188X_GPIO_BANK(90, 8, 0x98),
241 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
244 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
245 struct f7188x_sio *sio = bank->data->sio;
248 err = superio_enter(sio->addr);
251 superio_select(sio->addr, SIO_LD_GPIO);
253 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
255 superio_exit(sio->addr);
257 return !(dir & 1 << offset);
260 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
263 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
264 struct f7188x_sio *sio = bank->data->sio;
267 err = superio_enter(sio->addr);
270 superio_select(sio->addr, SIO_LD_GPIO);
272 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
274 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
276 superio_exit(sio->addr);
281 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset)
284 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
285 struct f7188x_sio *sio = bank->data->sio;
288 err = superio_enter(sio->addr);
291 superio_select(sio->addr, SIO_LD_GPIO);
293 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
294 dir = !!(dir & BIT(offset));
296 data = superio_inb(sio->addr, gpio_data_out(bank->regbase));
298 data = superio_inb(sio->addr, gpio_data_in(bank->regbase));
300 superio_exit(sio->addr);
302 return !!(data & BIT(offset));
305 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
306 unsigned offset, int value)
309 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
310 struct f7188x_sio *sio = bank->data->sio;
313 err = superio_enter(sio->addr);
316 superio_select(sio->addr, SIO_LD_GPIO);
318 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
320 data_out |= BIT(offset);
322 data_out &= ~BIT(offset);
323 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
325 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
327 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
329 superio_exit(sio->addr);
334 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
337 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
338 struct f7188x_sio *sio = bank->data->sio;
341 err = superio_enter(sio->addr);
344 superio_select(sio->addr, SIO_LD_GPIO);
346 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
348 data_out |= BIT(offset);
350 data_out &= ~BIT(offset);
351 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
353 superio_exit(sio->addr);
356 static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
357 unsigned long config)
360 enum pin_config_param param = pinconf_to_config_param(config);
361 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
362 struct f7188x_sio *sio = bank->data->sio;
365 if (param != PIN_CONFIG_DRIVE_OPEN_DRAIN &&
366 param != PIN_CONFIG_DRIVE_PUSH_PULL)
369 err = superio_enter(sio->addr);
372 superio_select(sio->addr, SIO_LD_GPIO);
374 data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));
375 if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
376 data &= ~BIT(offset);
379 superio_outb(sio->addr, gpio_out_mode(bank->regbase), data);
381 superio_exit(sio->addr);
386 * Platform device and driver.
389 static int f7188x_gpio_probe(struct platform_device *pdev)
393 struct f7188x_sio *sio = dev_get_platdata(&pdev->dev);
394 struct f7188x_gpio_data *data;
396 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
402 data->nr_bank = ARRAY_SIZE(f71869_gpio_bank);
403 data->bank = f71869_gpio_bank;
406 data->nr_bank = ARRAY_SIZE(f71869a_gpio_bank);
407 data->bank = f71869a_gpio_bank;
410 data->nr_bank = ARRAY_SIZE(f71882_gpio_bank);
411 data->bank = f71882_gpio_bank;
414 data->nr_bank = ARRAY_SIZE(f71889a_gpio_bank);
415 data->bank = f71889a_gpio_bank;
418 data->nr_bank = ARRAY_SIZE(f71889_gpio_bank);
419 data->bank = f71889_gpio_bank;
422 data->nr_bank = ARRAY_SIZE(f81866_gpio_bank);
423 data->bank = f81866_gpio_bank;
426 data->nr_bank = ARRAY_SIZE(f81804_gpio_bank);
427 data->bank = f81804_gpio_bank;
434 platform_set_drvdata(pdev, data);
436 /* For each GPIO bank, register a GPIO chip. */
437 for (i = 0; i < data->nr_bank; i++) {
438 struct f7188x_gpio_bank *bank = &data->bank[i];
440 bank->chip.parent = &pdev->dev;
443 err = devm_gpiochip_add_data(&pdev->dev, &bank->chip, bank);
446 "Failed to register gpiochip %d: %d\n",
455 static int __init f7188x_find(int addr, struct f7188x_sio *sio)
460 err = superio_enter(addr);
465 devid = superio_inw(addr, SIO_MANID);
466 if (devid != SIO_FINTEK_ID) {
467 pr_debug(DRVNAME ": Not a Fintek device at 0x%08x\n", addr);
471 devid = superio_inw(addr, SIO_DEVID);
480 sio->type = f71882fg;
495 pr_info(DRVNAME ": Unsupported Fintek device 0x%04x\n", devid);
501 pr_info(DRVNAME ": Found %s at %#x, revision %d\n",
502 f7188x_names[sio->type],
504 (int) superio_inb(addr, SIO_DEVREV));
511 static struct platform_device *f7188x_gpio_pdev;
514 f7188x_gpio_device_add(const struct f7188x_sio *sio)
518 f7188x_gpio_pdev = platform_device_alloc(DRVNAME, -1);
519 if (!f7188x_gpio_pdev)
522 err = platform_device_add_data(f7188x_gpio_pdev,
525 pr_err(DRVNAME "Platform data allocation failed\n");
529 err = platform_device_add(f7188x_gpio_pdev);
531 pr_err(DRVNAME "Device addition failed\n");
538 platform_device_put(f7188x_gpio_pdev);
544 * Try to match a supported Fintek device by reading the (hard-wired)
545 * configuration I/O ports. If available, then register both the platform
546 * device and driver to support the GPIOs.
549 static struct platform_driver f7188x_gpio_driver = {
553 .probe = f7188x_gpio_probe,
556 static int __init f7188x_gpio_init(void)
559 struct f7188x_sio sio;
561 if (f7188x_find(0x2e, &sio) &&
562 f7188x_find(0x4e, &sio))
565 err = platform_driver_register(&f7188x_gpio_driver);
567 err = f7188x_gpio_device_add(&sio);
569 platform_driver_unregister(&f7188x_gpio_driver);
574 subsys_initcall(f7188x_gpio_init);
576 static void __exit f7188x_gpio_exit(void)
578 platform_device_unregister(f7188x_gpio_pdev);
579 platform_driver_unregister(&f7188x_gpio_driver);
581 module_exit(f7188x_gpio_exit);
583 MODULE_DESCRIPTION("GPIO driver for Super-I/O chips F71869, F71869A, F71882FG, F71889A, F71889F and F81866");
585 MODULE_LICENSE("GPL");