2 * GPIO driver for Fintek Super-I/O F71869, F71869A, F71882 and F71889
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.h>
20 #define DRVNAME "gpio-f7188x"
25 #define SIO_LDSEL 0x07 /* Logical device select */
26 #define SIO_DEVID 0x20 /* Device ID (2 bytes) */
27 #define SIO_DEVREV 0x22 /* Device revision */
28 #define SIO_MANID 0x23 /* Fintek ID (2 bytes) */
30 #define SIO_LD_GPIO 0x06 /* GPIO logical device */
31 #define SIO_UNLOCK_KEY 0x87 /* Key to enable Super-I/O */
32 #define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
34 #define SIO_FINTEK_ID 0x1934 /* Manufacturer ID */
35 #define SIO_F71869_ID 0x0814 /* F71869 chipset ID */
36 #define SIO_F71869A_ID 0x1007 /* F71869A chipset ID */
37 #define SIO_F71882_ID 0x0541 /* F71882 chipset ID */
38 #define SIO_F71889_ID 0x0909 /* F71889 chipset ID */
40 enum chips { f71869, f71869a, f71882fg, f71889f };
42 static const char * const f7188x_names[] = {
54 struct f7188x_gpio_bank {
55 struct gpio_chip chip;
57 struct f7188x_gpio_data *data;
60 struct f7188x_gpio_data {
61 struct f7188x_sio *sio;
63 struct f7188x_gpio_bank *bank;
67 * Super-I/O functions.
70 static inline int superio_inb(int base, int reg)
76 static int superio_inw(int base, int reg)
81 val = inb(base + 1) << 8;
88 static inline void superio_outb(int base, int reg, int val)
94 static inline int superio_enter(int base)
96 /* Don't step on other drivers' I/O space by accident. */
97 if (!request_muxed_region(base, 2, DRVNAME)) {
98 pr_err(DRVNAME "I/O address 0x%04x already in use\n", base);
102 /* According to the datasheet the key must be send twice. */
103 outb(SIO_UNLOCK_KEY, base);
104 outb(SIO_UNLOCK_KEY, base);
109 static inline void superio_select(int base, int ld)
111 outb(SIO_LDSEL, base);
115 static inline void superio_exit(int base)
117 outb(SIO_LOCK_KEY, base);
118 release_region(base, 2);
125 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
126 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
127 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
128 unsigned offset, int value);
129 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
131 #define F7188X_GPIO_BANK(_base, _ngpio, _regbase) \
135 .owner = THIS_MODULE, \
136 .direction_input = f7188x_gpio_direction_in, \
137 .get = f7188x_gpio_get, \
138 .direction_output = f7188x_gpio_direction_out, \
139 .set = f7188x_gpio_set, \
144 .regbase = _regbase, \
147 #define gpio_dir(base) (base + 0)
148 #define gpio_data_out(base) (base + 1)
149 #define gpio_data_in(base) (base + 2)
150 /* Output mode register (0:open drain 1:push-pull). */
151 #define gpio_out_mode(base) (base + 3)
153 static struct f7188x_gpio_bank f71869_gpio_bank[] = {
154 F7188X_GPIO_BANK(0, 6, 0xF0),
155 F7188X_GPIO_BANK(10, 8, 0xE0),
156 F7188X_GPIO_BANK(20, 8, 0xD0),
157 F7188X_GPIO_BANK(30, 8, 0xC0),
158 F7188X_GPIO_BANK(40, 8, 0xB0),
159 F7188X_GPIO_BANK(50, 5, 0xA0),
160 F7188X_GPIO_BANK(60, 6, 0x90),
163 static struct f7188x_gpio_bank f71869a_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, 8, 0x90),
171 F7188X_GPIO_BANK(70, 8, 0x80),
174 static struct f7188x_gpio_bank f71882_gpio_bank[] = {
175 F7188X_GPIO_BANK(0 , 8, 0xF0),
176 F7188X_GPIO_BANK(10, 8, 0xE0),
177 F7188X_GPIO_BANK(20, 8, 0xD0),
178 F7188X_GPIO_BANK(30, 4, 0xC0),
179 F7188X_GPIO_BANK(40, 4, 0xB0),
182 static struct f7188x_gpio_bank f71889_gpio_bank[] = {
183 F7188X_GPIO_BANK(0 , 7, 0xF0),
184 F7188X_GPIO_BANK(10, 7, 0xE0),
185 F7188X_GPIO_BANK(20, 8, 0xD0),
186 F7188X_GPIO_BANK(30, 8, 0xC0),
187 F7188X_GPIO_BANK(40, 8, 0xB0),
188 F7188X_GPIO_BANK(50, 5, 0xA0),
189 F7188X_GPIO_BANK(60, 8, 0x90),
190 F7188X_GPIO_BANK(70, 8, 0x80),
193 static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
196 struct f7188x_gpio_bank *bank =
197 container_of(chip, struct f7188x_gpio_bank, chip);
198 struct f7188x_sio *sio = bank->data->sio;
201 err = superio_enter(sio->addr);
204 superio_select(sio->addr, SIO_LD_GPIO);
206 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
207 dir &= ~(1 << offset);
208 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
210 superio_exit(sio->addr);
215 static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset)
218 struct f7188x_gpio_bank *bank =
219 container_of(chip, struct f7188x_gpio_bank, chip);
220 struct f7188x_sio *sio = bank->data->sio;
223 err = superio_enter(sio->addr);
226 superio_select(sio->addr, SIO_LD_GPIO);
228 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
229 dir = !!(dir & (1 << offset));
231 data = superio_inb(sio->addr, gpio_data_out(bank->regbase));
233 data = superio_inb(sio->addr, gpio_data_in(bank->regbase));
235 superio_exit(sio->addr);
237 return !!(data & 1 << offset);
240 static int f7188x_gpio_direction_out(struct gpio_chip *chip,
241 unsigned offset, int value)
244 struct f7188x_gpio_bank *bank =
245 container_of(chip, struct f7188x_gpio_bank, chip);
246 struct f7188x_sio *sio = bank->data->sio;
249 err = superio_enter(sio->addr);
252 superio_select(sio->addr, SIO_LD_GPIO);
254 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
256 data_out |= (1 << offset);
258 data_out &= ~(1 << offset);
259 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
261 dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
262 dir |= (1 << offset);
263 superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
265 superio_exit(sio->addr);
270 static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
273 struct f7188x_gpio_bank *bank =
274 container_of(chip, struct f7188x_gpio_bank, chip);
275 struct f7188x_sio *sio = bank->data->sio;
278 err = superio_enter(sio->addr);
281 superio_select(sio->addr, SIO_LD_GPIO);
283 data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
285 data_out |= (1 << offset);
287 data_out &= ~(1 << offset);
288 superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
290 superio_exit(sio->addr);
294 * Platform device and driver.
297 static int f7188x_gpio_probe(struct platform_device *pdev)
301 struct f7188x_sio *sio = pdev->dev.platform_data;
302 struct f7188x_gpio_data *data;
304 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
310 data->nr_bank = ARRAY_SIZE(f71869_gpio_bank);
311 data->bank = f71869_gpio_bank;
314 data->nr_bank = ARRAY_SIZE(f71869a_gpio_bank);
315 data->bank = f71869a_gpio_bank;
318 data->nr_bank = ARRAY_SIZE(f71882_gpio_bank);
319 data->bank = f71882_gpio_bank;
322 data->nr_bank = ARRAY_SIZE(f71889_gpio_bank);
323 data->bank = f71889_gpio_bank;
330 platform_set_drvdata(pdev, data);
332 /* For each GPIO bank, register a GPIO chip. */
333 for (i = 0; i < data->nr_bank; i++) {
334 struct f7188x_gpio_bank *bank = &data->bank[i];
336 bank->chip.dev = &pdev->dev;
339 err = gpiochip_add(&bank->chip);
342 "Failed to register gpiochip %d: %d\n",
351 for (i = i - 1; i >= 0; i--) {
352 struct f7188x_gpio_bank *bank = &data->bank[i];
353 gpiochip_remove(&bank->chip);
359 static int f7188x_gpio_remove(struct platform_device *pdev)
362 struct f7188x_gpio_data *data = platform_get_drvdata(pdev);
364 for (i = 0; i < data->nr_bank; i++) {
365 struct f7188x_gpio_bank *bank = &data->bank[i];
366 gpiochip_remove(&bank->chip);
372 static int __init f7188x_find(int addr, struct f7188x_sio *sio)
377 err = superio_enter(addr);
382 devid = superio_inw(addr, SIO_MANID);
383 if (devid != SIO_FINTEK_ID) {
384 pr_debug(DRVNAME ": Not a Fintek device at 0x%08x\n", addr);
388 devid = superio_inw(addr, SIO_DEVID);
397 sio->type = f71882fg;
403 pr_info(DRVNAME ": Unsupported Fintek device 0x%04x\n", devid);
409 pr_info(DRVNAME ": Found %s at %#x, revision %d\n",
410 f7188x_names[sio->type],
412 (int) superio_inb(addr, SIO_DEVREV));
419 static struct platform_device *f7188x_gpio_pdev;
422 f7188x_gpio_device_add(const struct f7188x_sio *sio)
426 f7188x_gpio_pdev = platform_device_alloc(DRVNAME, -1);
427 if (!f7188x_gpio_pdev)
430 err = platform_device_add_data(f7188x_gpio_pdev,
433 pr_err(DRVNAME "Platform data allocation failed\n");
437 err = platform_device_add(f7188x_gpio_pdev);
439 pr_err(DRVNAME "Device addition failed\n");
446 platform_device_put(f7188x_gpio_pdev);
452 * Try to match a supported Fintek device by reading the (hard-wired)
453 * configuration I/O ports. If available, then register both the platform
454 * device and driver to support the GPIOs.
457 static struct platform_driver f7188x_gpio_driver = {
461 .probe = f7188x_gpio_probe,
462 .remove = f7188x_gpio_remove,
465 static int __init f7188x_gpio_init(void)
468 struct f7188x_sio sio;
470 if (f7188x_find(0x2e, &sio) &&
471 f7188x_find(0x4e, &sio))
474 err = platform_driver_register(&f7188x_gpio_driver);
476 err = f7188x_gpio_device_add(&sio);
478 platform_driver_unregister(&f7188x_gpio_driver);
483 subsys_initcall(f7188x_gpio_init);
485 static void __exit f7188x_gpio_exit(void)
487 platform_device_unregister(f7188x_gpio_pdev);
488 platform_driver_unregister(&f7188x_gpio_driver);
490 module_exit(f7188x_gpio_exit);
492 MODULE_DESCRIPTION("GPIO driver for Super-I/O chips F71869, F71869A, F71882FG and F71889F");
493 MODULE_AUTHOR("Simon Guinot <simon.guinot@sequanux.org>");
494 MODULE_LICENSE("GPL");