2 * GPIO driver for Fintek Super-I/O F71869, F71869A, F71882, F71889 and F81866
4 * Copyright (C) 2010-2013 LaCie
6 * Author: Simon Guinot <simon.guinot@sequanux.org>
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_F81866_ID 0x1010 /* F81866 chipset ID */
42 enum chips { f71869, f71869a, f71882fg, f71889f, f81866 };
44 static const char * const f7188x_names[] = {
57 struct f7188x_gpio_bank {
58 struct gpio_chip chip;
60 struct f7188x_gpio_data *data;
63 struct f7188x_gpio_data {
64 struct f7188x_sio *sio;
66 struct f7188x_gpio_bank *bank;
70 * Super-I/O functions.
73 static inline int superio_inb(int base, int reg)
79 static int superio_inw(int base, int reg)
84 val = inb(base + 1) << 8;
91 static inline void superio_outb(int base, int reg, int val)
97 static inline int superio_enter(int base)
99 /* Don't step on other drivers' I/O space by accident. */
100 if (!request_muxed_region(base, 2, DRVNAME)) {
101 pr_err(DRVNAME "I/O address 0x%04x already in use\n", base);
105 /* According to the datasheet the key must be send twice. */
106 outb(SIO_UNLOCK_KEY, base);
107 outb(SIO_UNLOCK_KEY, base);
112 static inline void superio_select(int base, int ld)
114 outb(SIO_LDSEL, base);
118 static inline void superio_exit(int base)
120 outb(SIO_LOCK_KEY, base);
121 release_region(base, 2);
128 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset);
129 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
130 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
131 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
132 unsigned offset, int value);
133 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
134 static int f7188x_gpio_set_single_ended(struct gpio_chip *gc,
136 enum single_ended_mode mode);
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_single_ended = f7188x_gpio_set_single_ended, \
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 f71889_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 f81866_gpio_bank[] = {
203 F7188X_GPIO_BANK(0, 8, 0xF0),
204 F7188X_GPIO_BANK(10, 8, 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, 8, 0xA0),
209 F7188X_GPIO_BANK(60, 8, 0x90),
210 F7188X_GPIO_BANK(70, 8, 0x80),
211 F7188X_GPIO_BANK(80, 8, 0x88),
214 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
217 struct f7188x_gpio_bank *bank =
218 container_of(chip, struct f7188x_gpio_bank, chip);
219 struct f7188x_sio *sio = bank->data->sio;
222 err = superio_enter(sio->addr);
225 superio_select(sio->addr, SIO_LD_GPIO);
227 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
229 superio_exit(sio->addr);
231 return !(dir & 1 << offset);
234 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
237 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
238 struct f7188x_sio *sio = bank->data->sio;
241 err = superio_enter(sio->addr);
244 superio_select(sio->addr, SIO_LD_GPIO);
246 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
248 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
250 superio_exit(sio->addr);
255 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset)
258 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
259 struct f7188x_sio *sio = bank->data->sio;
262 err = superio_enter(sio->addr);
265 superio_select(sio->addr, SIO_LD_GPIO);
267 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
268 dir = !!(dir & BIT(offset));
270 data = superio_inb(sio->addr, gpio_data_out(bank->regbase));
272 data = superio_inb(sio->addr, gpio_data_in(bank->regbase));
274 superio_exit(sio->addr);
276 return !!(data & BIT(offset));
279 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
280 unsigned offset, int value)
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 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
294 data_out |= BIT(offset);
296 data_out &= ~BIT(offset);
297 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
299 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
301 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
303 superio_exit(sio->addr);
308 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
311 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
312 struct f7188x_sio *sio = bank->data->sio;
315 err = superio_enter(sio->addr);
318 superio_select(sio->addr, SIO_LD_GPIO);
320 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
322 data_out |= BIT(offset);
324 data_out &= ~BIT(offset);
325 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
327 superio_exit(sio->addr);
330 static int f7188x_gpio_set_single_ended(struct gpio_chip *chip,
332 enum single_ended_mode mode)
335 struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
336 struct f7188x_sio *sio = bank->data->sio;
339 if (mode != LINE_MODE_OPEN_DRAIN &&
340 mode != LINE_MODE_PUSH_PULL)
343 err = superio_enter(sio->addr);
346 superio_select(sio->addr, SIO_LD_GPIO);
348 data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));
349 if (mode == LINE_MODE_OPEN_DRAIN)
350 data &= ~BIT(offset);
353 superio_outb(sio->addr, gpio_out_mode(bank->regbase), data);
355 superio_exit(sio->addr);
360 * Platform device and driver.
363 static int f7188x_gpio_probe(struct platform_device *pdev)
367 struct f7188x_sio *sio = dev_get_platdata(&pdev->dev);
368 struct f7188x_gpio_data *data;
370 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
376 data->nr_bank = ARRAY_SIZE(f71869_gpio_bank);
377 data->bank = f71869_gpio_bank;
380 data->nr_bank = ARRAY_SIZE(f71869a_gpio_bank);
381 data->bank = f71869a_gpio_bank;
384 data->nr_bank = ARRAY_SIZE(f71882_gpio_bank);
385 data->bank = f71882_gpio_bank;
388 data->nr_bank = ARRAY_SIZE(f71889_gpio_bank);
389 data->bank = f71889_gpio_bank;
392 data->nr_bank = ARRAY_SIZE(f81866_gpio_bank);
393 data->bank = f81866_gpio_bank;
400 platform_set_drvdata(pdev, data);
402 /* For each GPIO bank, register a GPIO chip. */
403 for (i = 0; i < data->nr_bank; i++) {
404 struct f7188x_gpio_bank *bank = &data->bank[i];
406 bank->chip.parent = &pdev->dev;
409 err = devm_gpiochip_add_data(&pdev->dev, &bank->chip, bank);
412 "Failed to register gpiochip %d: %d\n",
421 static int __init f7188x_find(int addr, struct f7188x_sio *sio)
426 err = superio_enter(addr);
431 devid = superio_inw(addr, SIO_MANID);
432 if (devid != SIO_FINTEK_ID) {
433 pr_debug(DRVNAME ": Not a Fintek device at 0x%08x\n", addr);
437 devid = superio_inw(addr, SIO_DEVID);
446 sio->type = f71882fg;
455 pr_info(DRVNAME ": Unsupported Fintek device 0x%04x\n", devid);
461 pr_info(DRVNAME ": Found %s at %#x, revision %d\n",
462 f7188x_names[sio->type],
464 (int) superio_inb(addr, SIO_DEVREV));
471 static struct platform_device *f7188x_gpio_pdev;
474 f7188x_gpio_device_add(const struct f7188x_sio *sio)
478 f7188x_gpio_pdev = platform_device_alloc(DRVNAME, -1);
479 if (!f7188x_gpio_pdev)
482 err = platform_device_add_data(f7188x_gpio_pdev,
485 pr_err(DRVNAME "Platform data allocation failed\n");
489 err = platform_device_add(f7188x_gpio_pdev);
491 pr_err(DRVNAME "Device addition failed\n");
498 platform_device_put(f7188x_gpio_pdev);
504 * Try to match a supported Fintek device by reading the (hard-wired)
505 * configuration I/O ports. If available, then register both the platform
506 * device and driver to support the GPIOs.
509 static struct platform_driver f7188x_gpio_driver = {
513 .probe = f7188x_gpio_probe,
516 static int __init f7188x_gpio_init(void)
519 struct f7188x_sio sio;
521 if (f7188x_find(0x2e, &sio) &&
522 f7188x_find(0x4e, &sio))
525 err = platform_driver_register(&f7188x_gpio_driver);
527 err = f7188x_gpio_device_add(&sio);
529 platform_driver_unregister(&f7188x_gpio_driver);
534 subsys_initcall(f7188x_gpio_init);
536 static void __exit f7188x_gpio_exit(void)
538 platform_device_unregister(f7188x_gpio_pdev);
539 platform_driver_unregister(&f7188x_gpio_driver);
541 module_exit(f7188x_gpio_exit);
543 MODULE_DESCRIPTION("GPIO driver for Super-I/O chips F71869, F71869A, F71882FG, F71889F and F81866");
544 MODULE_AUTHOR("Simon Guinot <simon.guinot@sequanux.org>");
545 MODULE_LICENSE("GPL");