1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * GPIO driver for Fintek Super-I/O F71869, F71869A, F71882, F71889 and F81866
5 * Copyright (C) 2010-2013 LaCie
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/platform_device.h>
14 #include <linux/gpio/driver.h>
15 #include <linux/bitops.h>
17 #define DRVNAME "gpio-f7188x"
22 #define SIO_LDSEL 0x07 /* Logical device select */
23 #define SIO_DEVID 0x20 /* Device ID (2 bytes) */
24 #define SIO_DEVREV 0x22 /* Device revision */
25 #define SIO_MANID 0x23 /* Fintek ID (2 bytes) */
27 #define SIO_LD_GPIO 0x06 /* GPIO logical device */
28 #define SIO_UNLOCK_KEY 0x87 /* Key to enable Super-I/O */
29 #define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
31 #define SIO_FINTEK_ID 0x1934 /* Manufacturer ID */
32 #define SIO_F71869_ID 0x0814 /* F71869 chipset ID */
33 #define SIO_F71869A_ID 0x1007 /* F71869A chipset ID */
34 #define SIO_F71882_ID 0x0541 /* F71882 chipset ID */
35 #define SIO_F71889_ID 0x0909 /* F71889 chipset ID */
36 #define SIO_F71889A_ID 0x1005 /* F71889A chipset ID */
37 #define SIO_F81866_ID 0x1010 /* F81866 chipset ID */
38 #define SIO_F81804_ID 0x1502 /* F81804 chipset ID, same for f81966 */
41 enum chips { f71869, f71869a, f71882fg, f71889a, f71889f, f81866, f81804 };
43 static const char * const f7188x_names[] = {
58 struct f7188x_gpio_bank {
59 struct gpio_chip chip;
61 struct f7188x_gpio_data *data;
64 struct f7188x_gpio_data {
65 struct f7188x_sio *sio;
67 struct f7188x_gpio_bank *bank;
71 * Super-I/O functions.
74 static inline int superio_inb(int base, int reg)
80 static int superio_inw(int base, int reg)
85 val = inb(base + 1) << 8;
92 static inline void superio_outb(int base, int reg, int val)
98 static inline int superio_enter(int base)
100 /* Don't step on other drivers' I/O space by accident. */
101 if (!request_muxed_region(base, 2, DRVNAME)) {
102 pr_err(DRVNAME "I/O address 0x%04x already in use\n", base);
106 /* According to the datasheet the key must be send twice. */
107 outb(SIO_UNLOCK_KEY, base);
108 outb(SIO_UNLOCK_KEY, base);
113 static inline void superio_select(int base, int ld)
115 outb(SIO_LDSEL, base);
119 static inline void superio_exit(int base)
121 outb(SIO_LOCK_KEY, base);
122 release_region(base, 2);
129 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset);
130 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
131 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
132 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
133 unsigned offset, int value);
134 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
135 static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
136 unsigned long config);
138 #define F7188X_GPIO_BANK(_base, _ngpio, _regbase) \
142 .owner = THIS_MODULE, \
143 .get_direction = f7188x_gpio_get_direction, \
144 .direction_input = f7188x_gpio_direction_in, \
145 .get = f7188x_gpio_get, \
146 .direction_output = f7188x_gpio_direction_out, \
147 .set = f7188x_gpio_set, \
148 .set_config = f7188x_gpio_set_config, \
153 .regbase = _regbase, \
156 #define gpio_dir(base) (base + 0)
157 #define gpio_data_out(base) (base + 1)
158 #define gpio_data_in(base) (base + 2)
159 /* Output mode register (0:open drain 1:push-pull). */
160 #define gpio_out_mode(base) (base + 3)
162 static struct f7188x_gpio_bank f71869_gpio_bank[] = {
163 F7188X_GPIO_BANK(0, 6, 0xF0),
164 F7188X_GPIO_BANK(10, 8, 0xE0),
165 F7188X_GPIO_BANK(20, 8, 0xD0),
166 F7188X_GPIO_BANK(30, 8, 0xC0),
167 F7188X_GPIO_BANK(40, 8, 0xB0),
168 F7188X_GPIO_BANK(50, 5, 0xA0),
169 F7188X_GPIO_BANK(60, 6, 0x90),
172 static struct f7188x_gpio_bank f71869a_gpio_bank[] = {
173 F7188X_GPIO_BANK(0, 6, 0xF0),
174 F7188X_GPIO_BANK(10, 8, 0xE0),
175 F7188X_GPIO_BANK(20, 8, 0xD0),
176 F7188X_GPIO_BANK(30, 8, 0xC0),
177 F7188X_GPIO_BANK(40, 8, 0xB0),
178 F7188X_GPIO_BANK(50, 5, 0xA0),
179 F7188X_GPIO_BANK(60, 8, 0x90),
180 F7188X_GPIO_BANK(70, 8, 0x80),
183 static struct f7188x_gpio_bank f71882_gpio_bank[] = {
184 F7188X_GPIO_BANK(0, 8, 0xF0),
185 F7188X_GPIO_BANK(10, 8, 0xE0),
186 F7188X_GPIO_BANK(20, 8, 0xD0),
187 F7188X_GPIO_BANK(30, 4, 0xC0),
188 F7188X_GPIO_BANK(40, 4, 0xB0),
191 static struct f7188x_gpio_bank f71889a_gpio_bank[] = {
192 F7188X_GPIO_BANK(0, 7, 0xF0),
193 F7188X_GPIO_BANK(10, 7, 0xE0),
194 F7188X_GPIO_BANK(20, 8, 0xD0),
195 F7188X_GPIO_BANK(30, 8, 0xC0),
196 F7188X_GPIO_BANK(40, 8, 0xB0),
197 F7188X_GPIO_BANK(50, 5, 0xA0),
198 F7188X_GPIO_BANK(60, 8, 0x90),
199 F7188X_GPIO_BANK(70, 8, 0x80),
202 static struct f7188x_gpio_bank f71889_gpio_bank[] = {
203 F7188X_GPIO_BANK(0, 7, 0xF0),
204 F7188X_GPIO_BANK(10, 7, 0xE0),
205 F7188X_GPIO_BANK(20, 8, 0xD0),
206 F7188X_GPIO_BANK(30, 8, 0xC0),
207 F7188X_GPIO_BANK(40, 8, 0xB0),
208 F7188X_GPIO_BANK(50, 5, 0xA0),
209 F7188X_GPIO_BANK(60, 8, 0x90),
210 F7188X_GPIO_BANK(70, 8, 0x80),
213 static struct f7188x_gpio_bank f81866_gpio_bank[] = {
214 F7188X_GPIO_BANK(0, 8, 0xF0),
215 F7188X_GPIO_BANK(10, 8, 0xE0),
216 F7188X_GPIO_BANK(20, 8, 0xD0),
217 F7188X_GPIO_BANK(30, 8, 0xC0),
218 F7188X_GPIO_BANK(40, 8, 0xB0),
219 F7188X_GPIO_BANK(50, 8, 0xA0),
220 F7188X_GPIO_BANK(60, 8, 0x90),
221 F7188X_GPIO_BANK(70, 8, 0x80),
222 F7188X_GPIO_BANK(80, 8, 0x88),
226 static struct f7188x_gpio_bank f81804_gpio_bank[] = {
227 F7188X_GPIO_BANK(0, 8, 0xF0),
228 F7188X_GPIO_BANK(10, 8, 0xE0),
229 F7188X_GPIO_BANK(20, 8, 0xD0),
230 F7188X_GPIO_BANK(50, 8, 0xA0),
231 F7188X_GPIO_BANK(60, 8, 0x90),
232 F7188X_GPIO_BANK(70, 8, 0x80),
233 F7188X_GPIO_BANK(90, 8, 0x98),
237 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
240 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
241 struct f7188x_sio *sio = bank->data->sio;
244 err = superio_enter(sio->addr);
247 superio_select(sio->addr, SIO_LD_GPIO);
249 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
251 superio_exit(sio->addr);
253 if (dir & 1 << offset)
254 return GPIO_LINE_DIRECTION_OUT;
256 return GPIO_LINE_DIRECTION_IN;
259 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
262 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
263 struct f7188x_sio *sio = bank->data->sio;
266 err = superio_enter(sio->addr);
269 superio_select(sio->addr, SIO_LD_GPIO);
271 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
273 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
275 superio_exit(sio->addr);
280 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset)
283 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
284 struct f7188x_sio *sio = bank->data->sio;
287 err = superio_enter(sio->addr);
290 superio_select(sio->addr, SIO_LD_GPIO);
292 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
293 dir = !!(dir & BIT(offset));
295 data = superio_inb(sio->addr, gpio_data_out(bank->regbase));
297 data = superio_inb(sio->addr, gpio_data_in(bank->regbase));
299 superio_exit(sio->addr);
301 return !!(data & BIT(offset));
304 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
305 unsigned offset, int value)
308 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
309 struct f7188x_sio *sio = bank->data->sio;
312 err = superio_enter(sio->addr);
315 superio_select(sio->addr, SIO_LD_GPIO);
317 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
319 data_out |= BIT(offset);
321 data_out &= ~BIT(offset);
322 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
324 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
326 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
328 superio_exit(sio->addr);
333 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
336 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
337 struct f7188x_sio *sio = bank->data->sio;
340 err = superio_enter(sio->addr);
343 superio_select(sio->addr, SIO_LD_GPIO);
345 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
347 data_out |= BIT(offset);
349 data_out &= ~BIT(offset);
350 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
352 superio_exit(sio->addr);
355 static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
356 unsigned long config)
359 enum pin_config_param param = pinconf_to_config_param(config);
360 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
361 struct f7188x_sio *sio = bank->data->sio;
364 if (param != PIN_CONFIG_DRIVE_OPEN_DRAIN &&
365 param != PIN_CONFIG_DRIVE_PUSH_PULL)
368 err = superio_enter(sio->addr);
371 superio_select(sio->addr, SIO_LD_GPIO);
373 data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));
374 if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
375 data &= ~BIT(offset);
378 superio_outb(sio->addr, gpio_out_mode(bank->regbase), data);
380 superio_exit(sio->addr);
385 * Platform device and driver.
388 static int f7188x_gpio_probe(struct platform_device *pdev)
392 struct f7188x_sio *sio = dev_get_platdata(&pdev->dev);
393 struct f7188x_gpio_data *data;
395 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
401 data->nr_bank = ARRAY_SIZE(f71869_gpio_bank);
402 data->bank = f71869_gpio_bank;
405 data->nr_bank = ARRAY_SIZE(f71869a_gpio_bank);
406 data->bank = f71869a_gpio_bank;
409 data->nr_bank = ARRAY_SIZE(f71882_gpio_bank);
410 data->bank = f71882_gpio_bank;
413 data->nr_bank = ARRAY_SIZE(f71889a_gpio_bank);
414 data->bank = f71889a_gpio_bank;
417 data->nr_bank = ARRAY_SIZE(f71889_gpio_bank);
418 data->bank = f71889_gpio_bank;
421 data->nr_bank = ARRAY_SIZE(f81866_gpio_bank);
422 data->bank = f81866_gpio_bank;
425 data->nr_bank = ARRAY_SIZE(f81804_gpio_bank);
426 data->bank = f81804_gpio_bank;
433 platform_set_drvdata(pdev, data);
435 /* For each GPIO bank, register a GPIO chip. */
436 for (i = 0; i < data->nr_bank; i++) {
437 struct f7188x_gpio_bank *bank = &data->bank[i];
439 bank->chip.parent = &pdev->dev;
442 err = devm_gpiochip_add_data(&pdev->dev, &bank->chip, bank);
445 "Failed to register gpiochip %d: %d\n",
454 static int __init f7188x_find(int addr, struct f7188x_sio *sio)
459 err = superio_enter(addr);
464 devid = superio_inw(addr, SIO_MANID);
465 if (devid != SIO_FINTEK_ID) {
466 pr_debug(DRVNAME ": Not a Fintek device at 0x%08x\n", addr);
470 devid = superio_inw(addr, SIO_DEVID);
479 sio->type = f71882fg;
494 pr_info(DRVNAME ": Unsupported Fintek device 0x%04x\n", devid);
500 pr_info(DRVNAME ": Found %s at %#x, revision %d\n",
501 f7188x_names[sio->type],
503 (int) superio_inb(addr, SIO_DEVREV));
510 static struct platform_device *f7188x_gpio_pdev;
513 f7188x_gpio_device_add(const struct f7188x_sio *sio)
517 f7188x_gpio_pdev = platform_device_alloc(DRVNAME, -1);
518 if (!f7188x_gpio_pdev)
521 err = platform_device_add_data(f7188x_gpio_pdev,
524 pr_err(DRVNAME "Platform data allocation failed\n");
528 err = platform_device_add(f7188x_gpio_pdev);
530 pr_err(DRVNAME "Device addition failed\n");
537 platform_device_put(f7188x_gpio_pdev);
543 * Try to match a supported Fintek device by reading the (hard-wired)
544 * configuration I/O ports. If available, then register both the platform
545 * device and driver to support the GPIOs.
548 static struct platform_driver f7188x_gpio_driver = {
552 .probe = f7188x_gpio_probe,
555 static int __init f7188x_gpio_init(void)
558 struct f7188x_sio sio;
560 if (f7188x_find(0x2e, &sio) &&
561 f7188x_find(0x4e, &sio))
564 err = platform_driver_register(&f7188x_gpio_driver);
566 err = f7188x_gpio_device_add(&sio);
568 platform_driver_unregister(&f7188x_gpio_driver);
573 subsys_initcall(f7188x_gpio_init);
575 static void __exit f7188x_gpio_exit(void)
577 platform_device_unregister(f7188x_gpio_pdev);
578 platform_driver_unregister(&f7188x_gpio_driver);
580 module_exit(f7188x_gpio_exit);
582 MODULE_DESCRIPTION("GPIO driver for Super-I/O chips F71869, F71869A, F71882FG, F71889A, F71889F and F81866");
584 MODULE_LICENSE("GPL");