forked from mirrors/linux
3d15d17fc3
switch pin base from static to automatic allocation to avoid conflicts and align with other gpio chip drivers Signed-off-by: xingtong.wu <xingtong.wu@siemens.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
666 lines
16 KiB
C
666 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* GPIO driver for Fintek and Nuvoton Super-I/O chips
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*
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* Copyright (C) 2010-2013 LaCie
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*
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* Author: Simon Guinot <simon.guinot@sequanux.org>
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*/
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#define DRVNAME "gpio-f7188x"
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#define pr_fmt(fmt) DRVNAME ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/gpio/driver.h>
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#include <linux/bitops.h>
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/*
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* Super-I/O registers
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*/
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#define SIO_LDSEL 0x07 /* Logical device select */
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#define SIO_DEVID 0x20 /* Device ID (2 bytes) */
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#define SIO_UNLOCK_KEY 0x87 /* Key to enable Super-I/O */
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#define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
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/*
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* Fintek devices.
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*/
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#define SIO_FINTEK_DEVREV 0x22 /* Fintek Device revision */
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#define SIO_FINTEK_MANID 0x23 /* Fintek ID (2 bytes) */
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#define SIO_FINTEK_ID 0x1934 /* Manufacturer ID */
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#define SIO_F71869_ID 0x0814 /* F71869 chipset ID */
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#define SIO_F71869A_ID 0x1007 /* F71869A chipset ID */
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#define SIO_F71882_ID 0x0541 /* F71882 chipset ID */
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#define SIO_F71889_ID 0x0909 /* F71889 chipset ID */
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#define SIO_F71889A_ID 0x1005 /* F71889A chipset ID */
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#define SIO_F81866_ID 0x1010 /* F81866 chipset ID */
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#define SIO_F81804_ID 0x1502 /* F81804 chipset ID, same for F81966 */
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#define SIO_F81865_ID 0x0704 /* F81865 chipset ID */
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#define SIO_LD_GPIO_FINTEK 0x06 /* GPIO logical device */
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/*
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* Nuvoton devices.
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*/
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#define SIO_NCT6126D_ID 0xD283 /* NCT6126D chipset ID */
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#define SIO_LD_GPIO_NUVOTON 0x07 /* GPIO logical device */
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enum chips {
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f71869,
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f71869a,
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f71882fg,
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f71889a,
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f71889f,
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f81866,
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f81804,
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f81865,
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nct6126d,
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};
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static const char * const f7188x_names[] = {
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"f71869",
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"f71869a",
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"f71882fg",
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"f71889a",
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"f71889f",
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"f81866",
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"f81804",
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"f81865",
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"nct6126d",
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};
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struct f7188x_sio {
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int addr;
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int device;
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enum chips type;
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};
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struct f7188x_gpio_bank {
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struct gpio_chip chip;
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unsigned int regbase;
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struct f7188x_gpio_data *data;
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};
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struct f7188x_gpio_data {
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struct f7188x_sio *sio;
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int nr_bank;
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struct f7188x_gpio_bank *bank;
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};
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/*
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* Super-I/O functions.
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*/
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static inline int superio_inb(int base, int reg)
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{
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outb(reg, base);
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return inb(base + 1);
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}
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static int superio_inw(int base, int reg)
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{
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int val;
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outb(reg++, base);
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val = inb(base + 1) << 8;
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outb(reg, base);
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val |= inb(base + 1);
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return val;
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}
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static inline void superio_outb(int base, int reg, int val)
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{
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outb(reg, base);
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outb(val, base + 1);
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}
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static inline int superio_enter(int base)
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{
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/* Don't step on other drivers' I/O space by accident. */
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if (!request_muxed_region(base, 2, DRVNAME)) {
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pr_err("I/O address 0x%04x already in use\n", base);
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return -EBUSY;
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}
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/* According to the datasheet the key must be send twice. */
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outb(SIO_UNLOCK_KEY, base);
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outb(SIO_UNLOCK_KEY, base);
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return 0;
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}
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static inline void superio_select(int base, int ld)
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{
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outb(SIO_LDSEL, base);
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outb(ld, base + 1);
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}
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static inline void superio_exit(int base)
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{
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outb(SIO_LOCK_KEY, base);
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release_region(base, 2);
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}
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/*
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* GPIO chip.
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*/
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static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset);
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static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
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static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
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static int f7188x_gpio_direction_out(struct gpio_chip *chip,
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unsigned offset, int value);
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static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
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static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
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unsigned long config);
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#define F7188X_GPIO_BANK(_ngpio, _regbase, _label) \
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{ \
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.chip = { \
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.label = _label, \
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.owner = THIS_MODULE, \
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.get_direction = f7188x_gpio_get_direction, \
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.direction_input = f7188x_gpio_direction_in, \
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.get = f7188x_gpio_get, \
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.direction_output = f7188x_gpio_direction_out, \
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.set = f7188x_gpio_set, \
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.set_config = f7188x_gpio_set_config, \
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.base = -1, \
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.ngpio = _ngpio, \
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.can_sleep = true, \
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}, \
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.regbase = _regbase, \
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}
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#define f7188x_gpio_dir(base) ((base) + 0)
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#define f7188x_gpio_data_out(base) ((base) + 1)
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#define f7188x_gpio_data_in(base) ((base) + 2)
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/* Output mode register (0:open drain 1:push-pull). */
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#define f7188x_gpio_out_mode(base) ((base) + 3)
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#define f7188x_gpio_dir_invert(type) ((type) == nct6126d)
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#define f7188x_gpio_data_single(type) ((type) == nct6126d)
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static struct f7188x_gpio_bank f71869_gpio_bank[] = {
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F7188X_GPIO_BANK(6, 0xF0, DRVNAME "-0"),
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F7188X_GPIO_BANK(8, 0xE0, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xD0, DRVNAME "-2"),
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F7188X_GPIO_BANK(8, 0xC0, DRVNAME "-3"),
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F7188X_GPIO_BANK(8, 0xB0, DRVNAME "-4"),
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F7188X_GPIO_BANK(5, 0xA0, DRVNAME "-5"),
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F7188X_GPIO_BANK(6, 0x90, DRVNAME "-6"),
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};
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static struct f7188x_gpio_bank f71869a_gpio_bank[] = {
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F7188X_GPIO_BANK(6, 0xF0, DRVNAME "-0"),
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F7188X_GPIO_BANK(8, 0xE0, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xD0, DRVNAME "-2"),
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F7188X_GPIO_BANK(8, 0xC0, DRVNAME "-3"),
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F7188X_GPIO_BANK(8, 0xB0, DRVNAME "-4"),
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F7188X_GPIO_BANK(5, 0xA0, DRVNAME "-5"),
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F7188X_GPIO_BANK(8, 0x90, DRVNAME "-6"),
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F7188X_GPIO_BANK(8, 0x80, DRVNAME "-7"),
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};
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static struct f7188x_gpio_bank f71882_gpio_bank[] = {
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F7188X_GPIO_BANK(8, 0xF0, DRVNAME "-0"),
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F7188X_GPIO_BANK(8, 0xE0, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xD0, DRVNAME "-2"),
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F7188X_GPIO_BANK(4, 0xC0, DRVNAME "-3"),
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F7188X_GPIO_BANK(4, 0xB0, DRVNAME "-4"),
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};
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static struct f7188x_gpio_bank f71889a_gpio_bank[] = {
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F7188X_GPIO_BANK(7, 0xF0, DRVNAME "-0"),
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F7188X_GPIO_BANK(7, 0xE0, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xD0, DRVNAME "-2"),
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F7188X_GPIO_BANK(8, 0xC0, DRVNAME "-3"),
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F7188X_GPIO_BANK(8, 0xB0, DRVNAME "-4"),
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F7188X_GPIO_BANK(5, 0xA0, DRVNAME "-5"),
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F7188X_GPIO_BANK(8, 0x90, DRVNAME "-6"),
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F7188X_GPIO_BANK(8, 0x80, DRVNAME "-7"),
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};
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static struct f7188x_gpio_bank f71889_gpio_bank[] = {
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F7188X_GPIO_BANK(7, 0xF0, DRVNAME "-0"),
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F7188X_GPIO_BANK(7, 0xE0, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xD0, DRVNAME "-2"),
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F7188X_GPIO_BANK(8, 0xC0, DRVNAME "-3"),
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F7188X_GPIO_BANK(8, 0xB0, DRVNAME "-4"),
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F7188X_GPIO_BANK(5, 0xA0, DRVNAME "-5"),
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F7188X_GPIO_BANK(8, 0x90, DRVNAME "-6"),
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F7188X_GPIO_BANK(8, 0x80, DRVNAME "-7"),
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};
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static struct f7188x_gpio_bank f81866_gpio_bank[] = {
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F7188X_GPIO_BANK(8, 0xF0, DRVNAME "-0"),
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F7188X_GPIO_BANK(8, 0xE0, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xD0, DRVNAME "-2"),
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F7188X_GPIO_BANK(8, 0xC0, DRVNAME "-3"),
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F7188X_GPIO_BANK(8, 0xB0, DRVNAME "-4"),
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F7188X_GPIO_BANK(8, 0xA0, DRVNAME "-5"),
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F7188X_GPIO_BANK(8, 0x90, DRVNAME "-6"),
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F7188X_GPIO_BANK(8, 0x80, DRVNAME "-7"),
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F7188X_GPIO_BANK(8, 0x88, DRVNAME "-8"),
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};
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static struct f7188x_gpio_bank f81804_gpio_bank[] = {
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F7188X_GPIO_BANK(8, 0xF0, DRVNAME "-0"),
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F7188X_GPIO_BANK(8, 0xE0, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xD0, DRVNAME "-2"),
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F7188X_GPIO_BANK(8, 0xA0, DRVNAME "-3"),
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F7188X_GPIO_BANK(8, 0x90, DRVNAME "-4"),
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F7188X_GPIO_BANK(8, 0x80, DRVNAME "-5"),
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F7188X_GPIO_BANK(8, 0x98, DRVNAME "-6"),
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};
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static struct f7188x_gpio_bank f81865_gpio_bank[] = {
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F7188X_GPIO_BANK(8, 0xF0, DRVNAME "-0"),
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F7188X_GPIO_BANK(8, 0xE0, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xD0, DRVNAME "-2"),
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F7188X_GPIO_BANK(8, 0xC0, DRVNAME "-3"),
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F7188X_GPIO_BANK(8, 0xB0, DRVNAME "-4"),
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F7188X_GPIO_BANK(8, 0xA0, DRVNAME "-5"),
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F7188X_GPIO_BANK(5, 0x90, DRVNAME "-6"),
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};
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static struct f7188x_gpio_bank nct6126d_gpio_bank[] = {
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F7188X_GPIO_BANK(8, 0xE0, DRVNAME "-0"),
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F7188X_GPIO_BANK(8, 0xE4, DRVNAME "-1"),
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F7188X_GPIO_BANK(8, 0xE8, DRVNAME "-2"),
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F7188X_GPIO_BANK(8, 0xEC, DRVNAME "-3"),
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F7188X_GPIO_BANK(8, 0xF0, DRVNAME "-4"),
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F7188X_GPIO_BANK(8, 0xF4, DRVNAME "-5"),
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F7188X_GPIO_BANK(8, 0xF8, DRVNAME "-6"),
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F7188X_GPIO_BANK(8, 0xFC, DRVNAME "-7"),
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};
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static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
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{
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int err;
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struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
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struct f7188x_sio *sio = bank->data->sio;
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u8 dir;
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err = superio_enter(sio->addr);
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if (err)
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return err;
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superio_select(sio->addr, sio->device);
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dir = superio_inb(sio->addr, f7188x_gpio_dir(bank->regbase));
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superio_exit(sio->addr);
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if (f7188x_gpio_dir_invert(sio->type))
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dir = ~dir;
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if (dir & BIT(offset))
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return GPIO_LINE_DIRECTION_OUT;
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return GPIO_LINE_DIRECTION_IN;
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}
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static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
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{
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int err;
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struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
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struct f7188x_sio *sio = bank->data->sio;
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u8 dir;
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err = superio_enter(sio->addr);
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if (err)
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return err;
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superio_select(sio->addr, sio->device);
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dir = superio_inb(sio->addr, f7188x_gpio_dir(bank->regbase));
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if (f7188x_gpio_dir_invert(sio->type))
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dir |= BIT(offset);
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else
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dir &= ~BIT(offset);
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superio_outb(sio->addr, f7188x_gpio_dir(bank->regbase), dir);
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superio_exit(sio->addr);
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return 0;
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}
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static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset)
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{
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int err;
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struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
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struct f7188x_sio *sio = bank->data->sio;
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u8 dir, data;
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err = superio_enter(sio->addr);
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if (err)
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return err;
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superio_select(sio->addr, sio->device);
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dir = superio_inb(sio->addr, f7188x_gpio_dir(bank->regbase));
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dir = !!(dir & BIT(offset));
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if (f7188x_gpio_data_single(sio->type) || dir)
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data = superio_inb(sio->addr, f7188x_gpio_data_out(bank->regbase));
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else
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data = superio_inb(sio->addr, f7188x_gpio_data_in(bank->regbase));
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superio_exit(sio->addr);
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return !!(data & BIT(offset));
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}
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static int f7188x_gpio_direction_out(struct gpio_chip *chip,
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unsigned offset, int value)
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{
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int err;
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struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
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struct f7188x_sio *sio = bank->data->sio;
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u8 dir, data_out;
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err = superio_enter(sio->addr);
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if (err)
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return err;
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superio_select(sio->addr, sio->device);
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data_out = superio_inb(sio->addr, f7188x_gpio_data_out(bank->regbase));
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if (value)
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data_out |= BIT(offset);
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else
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data_out &= ~BIT(offset);
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superio_outb(sio->addr, f7188x_gpio_data_out(bank->regbase), data_out);
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dir = superio_inb(sio->addr, f7188x_gpio_dir(bank->regbase));
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if (f7188x_gpio_dir_invert(sio->type))
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dir &= ~BIT(offset);
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else
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dir |= BIT(offset);
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superio_outb(sio->addr, f7188x_gpio_dir(bank->regbase), dir);
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superio_exit(sio->addr);
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return 0;
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}
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static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
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{
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int err;
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struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
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struct f7188x_sio *sio = bank->data->sio;
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u8 data_out;
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err = superio_enter(sio->addr);
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if (err)
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return;
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superio_select(sio->addr, sio->device);
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data_out = superio_inb(sio->addr, f7188x_gpio_data_out(bank->regbase));
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if (value)
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data_out |= BIT(offset);
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else
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data_out &= ~BIT(offset);
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superio_outb(sio->addr, f7188x_gpio_data_out(bank->regbase), data_out);
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superio_exit(sio->addr);
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}
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static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
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unsigned long config)
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{
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int err;
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enum pin_config_param param = pinconf_to_config_param(config);
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struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
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struct f7188x_sio *sio = bank->data->sio;
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u8 data;
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if (param != PIN_CONFIG_DRIVE_OPEN_DRAIN &&
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param != PIN_CONFIG_DRIVE_PUSH_PULL)
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return -ENOTSUPP;
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err = superio_enter(sio->addr);
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if (err)
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return err;
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superio_select(sio->addr, sio->device);
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data = superio_inb(sio->addr, f7188x_gpio_out_mode(bank->regbase));
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if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
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data &= ~BIT(offset);
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else
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data |= BIT(offset);
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superio_outb(sio->addr, f7188x_gpio_out_mode(bank->regbase), data);
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superio_exit(sio->addr);
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return 0;
|
|
}
|
|
|
|
/*
|
|
* Platform device and driver.
|
|
*/
|
|
|
|
static int f7188x_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
int err;
|
|
int i;
|
|
struct f7188x_sio *sio = dev_get_platdata(&pdev->dev);
|
|
struct f7188x_gpio_data *data;
|
|
|
|
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
switch (sio->type) {
|
|
case f71869:
|
|
data->nr_bank = ARRAY_SIZE(f71869_gpio_bank);
|
|
data->bank = f71869_gpio_bank;
|
|
break;
|
|
case f71869a:
|
|
data->nr_bank = ARRAY_SIZE(f71869a_gpio_bank);
|
|
data->bank = f71869a_gpio_bank;
|
|
break;
|
|
case f71882fg:
|
|
data->nr_bank = ARRAY_SIZE(f71882_gpio_bank);
|
|
data->bank = f71882_gpio_bank;
|
|
break;
|
|
case f71889a:
|
|
data->nr_bank = ARRAY_SIZE(f71889a_gpio_bank);
|
|
data->bank = f71889a_gpio_bank;
|
|
break;
|
|
case f71889f:
|
|
data->nr_bank = ARRAY_SIZE(f71889_gpio_bank);
|
|
data->bank = f71889_gpio_bank;
|
|
break;
|
|
case f81866:
|
|
data->nr_bank = ARRAY_SIZE(f81866_gpio_bank);
|
|
data->bank = f81866_gpio_bank;
|
|
break;
|
|
case f81804:
|
|
data->nr_bank = ARRAY_SIZE(f81804_gpio_bank);
|
|
data->bank = f81804_gpio_bank;
|
|
break;
|
|
case f81865:
|
|
data->nr_bank = ARRAY_SIZE(f81865_gpio_bank);
|
|
data->bank = f81865_gpio_bank;
|
|
break;
|
|
case nct6126d:
|
|
data->nr_bank = ARRAY_SIZE(nct6126d_gpio_bank);
|
|
data->bank = nct6126d_gpio_bank;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
data->sio = sio;
|
|
|
|
platform_set_drvdata(pdev, data);
|
|
|
|
/* For each GPIO bank, register a GPIO chip. */
|
|
for (i = 0; i < data->nr_bank; i++) {
|
|
struct f7188x_gpio_bank *bank = &data->bank[i];
|
|
|
|
bank->chip.parent = &pdev->dev;
|
|
bank->data = data;
|
|
|
|
err = devm_gpiochip_add_data(&pdev->dev, &bank->chip, bank);
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to register gpiochip %d: %d\n",
|
|
i, err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init f7188x_find(int addr, struct f7188x_sio *sio)
|
|
{
|
|
int err;
|
|
u16 devid;
|
|
u16 manid;
|
|
|
|
err = superio_enter(addr);
|
|
if (err)
|
|
return err;
|
|
|
|
err = -ENODEV;
|
|
|
|
sio->device = SIO_LD_GPIO_FINTEK;
|
|
devid = superio_inw(addr, SIO_DEVID);
|
|
switch (devid) {
|
|
case SIO_F71869_ID:
|
|
sio->type = f71869;
|
|
break;
|
|
case SIO_F71869A_ID:
|
|
sio->type = f71869a;
|
|
break;
|
|
case SIO_F71882_ID:
|
|
sio->type = f71882fg;
|
|
break;
|
|
case SIO_F71889A_ID:
|
|
sio->type = f71889a;
|
|
break;
|
|
case SIO_F71889_ID:
|
|
sio->type = f71889f;
|
|
break;
|
|
case SIO_F81866_ID:
|
|
sio->type = f81866;
|
|
break;
|
|
case SIO_F81804_ID:
|
|
sio->type = f81804;
|
|
break;
|
|
case SIO_F81865_ID:
|
|
sio->type = f81865;
|
|
break;
|
|
case SIO_NCT6126D_ID:
|
|
sio->device = SIO_LD_GPIO_NUVOTON;
|
|
sio->type = nct6126d;
|
|
break;
|
|
default:
|
|
pr_info("Unsupported Fintek device 0x%04x\n", devid);
|
|
goto err;
|
|
}
|
|
|
|
/* double check manufacturer where possible */
|
|
if (sio->type != nct6126d) {
|
|
manid = superio_inw(addr, SIO_FINTEK_MANID);
|
|
if (manid != SIO_FINTEK_ID) {
|
|
pr_debug("Not a Fintek device at 0x%08x\n", addr);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
sio->addr = addr;
|
|
err = 0;
|
|
|
|
pr_info("Found %s at %#x\n", f7188x_names[sio->type], (unsigned int)addr);
|
|
if (sio->type != nct6126d)
|
|
pr_info(" revision %d\n", superio_inb(addr, SIO_FINTEK_DEVREV));
|
|
|
|
err:
|
|
superio_exit(addr);
|
|
return err;
|
|
}
|
|
|
|
static struct platform_device *f7188x_gpio_pdev;
|
|
|
|
static int __init
|
|
f7188x_gpio_device_add(const struct f7188x_sio *sio)
|
|
{
|
|
int err;
|
|
|
|
f7188x_gpio_pdev = platform_device_alloc(DRVNAME, -1);
|
|
if (!f7188x_gpio_pdev)
|
|
return -ENOMEM;
|
|
|
|
err = platform_device_add_data(f7188x_gpio_pdev,
|
|
sio, sizeof(*sio));
|
|
if (err) {
|
|
pr_err("Platform data allocation failed\n");
|
|
goto err;
|
|
}
|
|
|
|
err = platform_device_add(f7188x_gpio_pdev);
|
|
if (err) {
|
|
pr_err("Device addition failed\n");
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
platform_device_put(f7188x_gpio_pdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Try to match a supported Fintek device by reading the (hard-wired)
|
|
* configuration I/O ports. If available, then register both the platform
|
|
* device and driver to support the GPIOs.
|
|
*/
|
|
|
|
static struct platform_driver f7188x_gpio_driver = {
|
|
.driver = {
|
|
.name = DRVNAME,
|
|
},
|
|
.probe = f7188x_gpio_probe,
|
|
};
|
|
|
|
static int __init f7188x_gpio_init(void)
|
|
{
|
|
int err;
|
|
struct f7188x_sio sio;
|
|
|
|
if (f7188x_find(0x2e, &sio) &&
|
|
f7188x_find(0x4e, &sio))
|
|
return -ENODEV;
|
|
|
|
err = platform_driver_register(&f7188x_gpio_driver);
|
|
if (!err) {
|
|
err = f7188x_gpio_device_add(&sio);
|
|
if (err)
|
|
platform_driver_unregister(&f7188x_gpio_driver);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
subsys_initcall(f7188x_gpio_init);
|
|
|
|
static void __exit f7188x_gpio_exit(void)
|
|
{
|
|
platform_device_unregister(f7188x_gpio_pdev);
|
|
platform_driver_unregister(&f7188x_gpio_driver);
|
|
}
|
|
module_exit(f7188x_gpio_exit);
|
|
|
|
MODULE_DESCRIPTION("GPIO driver for Super-I/O chips F71869, F71869A, F71882FG, F71889A, F71889F and F81866");
|
|
MODULE_AUTHOR("Simon Guinot <simon.guinot@sequanux.org>");
|
|
MODULE_LICENSE("GPL");
|