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 */
43 enum chips { f71869, f71869a, f71882fg, f71889a, f71889f, f81866 };
45 static const char * const f7188x_names[] = {
59 struct f7188x_gpio_bank {
60 struct gpio_chip chip;
62 struct f7188x_gpio_data *data;
65 struct f7188x_gpio_data {
66 struct f7188x_sio *sio;
68 struct f7188x_gpio_bank *bank;
72 * Super-I/O functions.
75 static inline int superio_inb(int base, int reg)
81 static int superio_inw(int base, int reg)
86 val = inb(base + 1) << 8;
93 static inline void superio_outb(int base, int reg, int val)
99 static inline int superio_enter(int base)
101 /* Don't step on other drivers' I/O space by accident. */
102 if (!request_muxed_region(base, 2, DRVNAME)) {
103 pr_err(DRVNAME "I/O address 0x%04x already in use\n", base);
107 /* According to the datasheet the key must be send twice. */
108 outb(SIO_UNLOCK_KEY, base);
109 outb(SIO_UNLOCK_KEY, base);
114 static inline void superio_select(int base, int ld)
116 outb(SIO_LDSEL, base);
120 static inline void superio_exit(int base)
122 outb(SIO_LOCK_KEY, base);
123 release_region(base, 2);
130 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset);
131 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
132 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
133 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
134 unsigned offset, int value);
135 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
136 static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
137 unsigned long config);
139 #define F7188X_GPIO_BANK(_base, _ngpio, _regbase) \
143 .owner = THIS_MODULE, \
144 .get_direction = f7188x_gpio_get_direction, \
145 .direction_input = f7188x_gpio_direction_in, \
146 .get = f7188x_gpio_get, \
147 .direction_output = f7188x_gpio_direction_out, \
148 .set = f7188x_gpio_set, \
149 .set_config = f7188x_gpio_set_config, \
154 .regbase = _regbase, \
157 #define gpio_dir(base) (base + 0)
158 #define gpio_data_out(base) (base + 1)
159 #define gpio_data_in(base) (base + 2)
160 /* Output mode register (0:open drain 1:push-pull). */
161 #define gpio_out_mode(base) (base + 3)
163 static struct f7188x_gpio_bank f71869_gpio_bank[] = {
164 F7188X_GPIO_BANK(0, 6, 0xF0),
165 F7188X_GPIO_BANK(10, 8, 0xE0),
166 F7188X_GPIO_BANK(20, 8, 0xD0),
167 F7188X_GPIO_BANK(30, 8, 0xC0),
168 F7188X_GPIO_BANK(40, 8, 0xB0),
169 F7188X_GPIO_BANK(50, 5, 0xA0),
170 F7188X_GPIO_BANK(60, 6, 0x90),
173 static struct f7188x_gpio_bank f71869a_gpio_bank[] = {
174 F7188X_GPIO_BANK(0, 6, 0xF0),
175 F7188X_GPIO_BANK(10, 8, 0xE0),
176 F7188X_GPIO_BANK(20, 8, 0xD0),
177 F7188X_GPIO_BANK(30, 8, 0xC0),
178 F7188X_GPIO_BANK(40, 8, 0xB0),
179 F7188X_GPIO_BANK(50, 5, 0xA0),
180 F7188X_GPIO_BANK(60, 8, 0x90),
181 F7188X_GPIO_BANK(70, 8, 0x80),
184 static struct f7188x_gpio_bank f71882_gpio_bank[] = {
185 F7188X_GPIO_BANK(0, 8, 0xF0),
186 F7188X_GPIO_BANK(10, 8, 0xE0),
187 F7188X_GPIO_BANK(20, 8, 0xD0),
188 F7188X_GPIO_BANK(30, 4, 0xC0),
189 F7188X_GPIO_BANK(40, 4, 0xB0),
192 static struct f7188x_gpio_bank f71889a_gpio_bank[] = {
193 F7188X_GPIO_BANK(0, 7, 0xF0),
194 F7188X_GPIO_BANK(10, 7, 0xE0),
195 F7188X_GPIO_BANK(20, 8, 0xD0),
196 F7188X_GPIO_BANK(30, 8, 0xC0),
197 F7188X_GPIO_BANK(40, 8, 0xB0),
198 F7188X_GPIO_BANK(50, 5, 0xA0),
199 F7188X_GPIO_BANK(60, 8, 0x90),
200 F7188X_GPIO_BANK(70, 8, 0x80),
203 static struct f7188x_gpio_bank f71889_gpio_bank[] = {
204 F7188X_GPIO_BANK(0, 7, 0xF0),
205 F7188X_GPIO_BANK(10, 7, 0xE0),
206 F7188X_GPIO_BANK(20, 8, 0xD0),
207 F7188X_GPIO_BANK(30, 8, 0xC0),
208 F7188X_GPIO_BANK(40, 8, 0xB0),
209 F7188X_GPIO_BANK(50, 5, 0xA0),
210 F7188X_GPIO_BANK(60, 8, 0x90),
211 F7188X_GPIO_BANK(70, 8, 0x80),
214 static struct f7188x_gpio_bank f81866_gpio_bank[] = {
215 F7188X_GPIO_BANK(0, 8, 0xF0),
216 F7188X_GPIO_BANK(10, 8, 0xE0),
217 F7188X_GPIO_BANK(20, 8, 0xD0),
218 F7188X_GPIO_BANK(30, 8, 0xC0),
219 F7188X_GPIO_BANK(40, 8, 0xB0),
220 F7188X_GPIO_BANK(50, 8, 0xA0),
221 F7188X_GPIO_BANK(60, 8, 0x90),
222 F7188X_GPIO_BANK(70, 8, 0x80),
223 F7188X_GPIO_BANK(80, 8, 0x88),
226 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
229 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
230 struct f7188x_sio *sio = bank->data->sio;
233 err = superio_enter(sio->addr);
236 superio_select(sio->addr, SIO_LD_GPIO);
238 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
240 superio_exit(sio->addr);
242 return !(dir & 1 << offset);
245 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
248 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
249 struct f7188x_sio *sio = bank->data->sio;
252 err = superio_enter(sio->addr);
255 superio_select(sio->addr, SIO_LD_GPIO);
257 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
259 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
261 superio_exit(sio->addr);
266 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset)
269 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
270 struct f7188x_sio *sio = bank->data->sio;
273 err = superio_enter(sio->addr);
276 superio_select(sio->addr, SIO_LD_GPIO);
278 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
279 dir = !!(dir & BIT(offset));
281 data = superio_inb(sio->addr, gpio_data_out(bank->regbase));
283 data = superio_inb(sio->addr, gpio_data_in(bank->regbase));
285 superio_exit(sio->addr);
287 return !!(data & BIT(offset));
290 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
291 unsigned offset, int value)
294 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
295 struct f7188x_sio *sio = bank->data->sio;
298 err = superio_enter(sio->addr);
301 superio_select(sio->addr, SIO_LD_GPIO);
303 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
305 data_out |= BIT(offset);
307 data_out &= ~BIT(offset);
308 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
310 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
312 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
314 superio_exit(sio->addr);
319 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
322 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
323 struct f7188x_sio *sio = bank->data->sio;
326 err = superio_enter(sio->addr);
329 superio_select(sio->addr, SIO_LD_GPIO);
331 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
333 data_out |= BIT(offset);
335 data_out &= ~BIT(offset);
336 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
338 superio_exit(sio->addr);
341 static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
342 unsigned long config)
345 enum pin_config_param param = pinconf_to_config_param(config);
346 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
347 struct f7188x_sio *sio = bank->data->sio;
350 if (param != PIN_CONFIG_DRIVE_OPEN_DRAIN &&
351 param != PIN_CONFIG_DRIVE_PUSH_PULL)
354 err = superio_enter(sio->addr);
357 superio_select(sio->addr, SIO_LD_GPIO);
359 data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));
360 if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
361 data &= ~BIT(offset);
364 superio_outb(sio->addr, gpio_out_mode(bank->regbase), data);
366 superio_exit(sio->addr);
371 * Platform device and driver.
374 static int f7188x_gpio_probe(struct platform_device *pdev)
378 struct f7188x_sio *sio = dev_get_platdata(&pdev->dev);
379 struct f7188x_gpio_data *data;
381 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
387 data->nr_bank = ARRAY_SIZE(f71869_gpio_bank);
388 data->bank = f71869_gpio_bank;
391 data->nr_bank = ARRAY_SIZE(f71869a_gpio_bank);
392 data->bank = f71869a_gpio_bank;
395 data->nr_bank = ARRAY_SIZE(f71882_gpio_bank);
396 data->bank = f71882_gpio_bank;
399 data->nr_bank = ARRAY_SIZE(f71889a_gpio_bank);
400 data->bank = f71889a_gpio_bank;
403 data->nr_bank = ARRAY_SIZE(f71889_gpio_bank);
404 data->bank = f71889_gpio_bank;
407 data->nr_bank = ARRAY_SIZE(f81866_gpio_bank);
408 data->bank = f81866_gpio_bank;
415 platform_set_drvdata(pdev, data);
417 /* For each GPIO bank, register a GPIO chip. */
418 for (i = 0; i < data->nr_bank; i++) {
419 struct f7188x_gpio_bank *bank = &data->bank[i];
421 bank->chip.parent = &pdev->dev;
424 err = devm_gpiochip_add_data(&pdev->dev, &bank->chip, bank);
427 "Failed to register gpiochip %d: %d\n",
436 static int __init f7188x_find(int addr, struct f7188x_sio *sio)
441 err = superio_enter(addr);
446 devid = superio_inw(addr, SIO_MANID);
447 if (devid != SIO_FINTEK_ID) {
448 pr_debug(DRVNAME ": Not a Fintek device at 0x%08x\n", addr);
452 devid = superio_inw(addr, SIO_DEVID);
461 sio->type = f71882fg;
473 pr_info(DRVNAME ": Unsupported Fintek device 0x%04x\n", devid);
479 pr_info(DRVNAME ": Found %s at %#x, revision %d\n",
480 f7188x_names[sio->type],
482 (int) superio_inb(addr, SIO_DEVREV));
489 static struct platform_device *f7188x_gpio_pdev;
492 f7188x_gpio_device_add(const struct f7188x_sio *sio)
496 f7188x_gpio_pdev = platform_device_alloc(DRVNAME, -1);
497 if (!f7188x_gpio_pdev)
500 err = platform_device_add_data(f7188x_gpio_pdev,
503 pr_err(DRVNAME "Platform data allocation failed\n");
507 err = platform_device_add(f7188x_gpio_pdev);
509 pr_err(DRVNAME "Device addition failed\n");
516 platform_device_put(f7188x_gpio_pdev);
522 * Try to match a supported Fintek device by reading the (hard-wired)
523 * configuration I/O ports. If available, then register both the platform
524 * device and driver to support the GPIOs.
527 static struct platform_driver f7188x_gpio_driver = {
531 .probe = f7188x_gpio_probe,
534 static int __init f7188x_gpio_init(void)
537 struct f7188x_sio sio;
539 if (f7188x_find(0x2e, &sio) &&
540 f7188x_find(0x4e, &sio))
543 err = platform_driver_register(&f7188x_gpio_driver);
545 err = f7188x_gpio_device_add(&sio);
547 platform_driver_unregister(&f7188x_gpio_driver);
552 subsys_initcall(f7188x_gpio_init);
554 static void __exit f7188x_gpio_exit(void)
556 platform_device_unregister(f7188x_gpio_pdev);
557 platform_driver_unregister(&f7188x_gpio_driver);
559 module_exit(f7188x_gpio_exit);
561 MODULE_DESCRIPTION("GPIO driver for Super-I/O chips F71869, F71869A, F71882FG, F71889A, F71889F and F81866");
563 MODULE_LICENSE("GPL");