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alistair23-linux/drivers/gpio/gpio-f7188x.c
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* GPIO driver for Fintek Super-I/O F71869, F71869A, F71882, F71889 and F81866
*
* Copyright (C) 2010-2013 LaCie
*
* Author: Simon Guinot <simon.guinot@sequanux.org>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/gpio/driver.h>
#include <linux/bitops.h>
#define DRVNAME "gpio-f7188x"
/*
* Super-I/O registers
*/
#define SIO_LDSEL 0x07 /* Logical device select */
#define SIO_DEVID 0x20 /* Device ID (2 bytes) */
#define SIO_DEVREV 0x22 /* Device revision */
#define SIO_MANID 0x23 /* Fintek ID (2 bytes) */
#define SIO_LD_GPIO 0x06 /* GPIO logical device */
#define SIO_UNLOCK_KEY 0x87 /* Key to enable Super-I/O */
#define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
#define SIO_FINTEK_ID 0x1934 /* Manufacturer ID */
#define SIO_F71869_ID 0x0814 /* F71869 chipset ID */
#define SIO_F71869A_ID 0x1007 /* F71869A chipset ID */
#define SIO_F71882_ID 0x0541 /* F71882 chipset ID */
#define SIO_F71889_ID 0x0909 /* F71889 chipset ID */
#define SIO_F71889A_ID 0x1005 /* F71889A chipset ID */
#define SIO_F81866_ID 0x1010 /* F81866 chipset ID */
#define SIO_F81804_ID 0x1502 /* F81804 chipset ID, same for f81966 */
enum chips { f71869, f71869a, f71882fg, f71889a, f71889f, f81866, f81804 };
static const char * const f7188x_names[] = {
"f71869",
"f71869a",
"f71882fg",
"f71889a",
"f71889f",
"f81866",
"f81804",
};
struct f7188x_sio {
int addr;
enum chips type;
};
struct f7188x_gpio_bank {
struct gpio_chip chip;
unsigned int regbase;
struct f7188x_gpio_data *data;
};
struct f7188x_gpio_data {
struct f7188x_sio *sio;
int nr_bank;
struct f7188x_gpio_bank *bank;
};
/*
* Super-I/O functions.
*/
static inline int superio_inb(int base, int reg)
{
outb(reg, base);
return inb(base + 1);
}
static int superio_inw(int base, int reg)
{
int val;
outb(reg++, base);
val = inb(base + 1) << 8;
outb(reg, base);
val |= inb(base + 1);
return val;
}
static inline void superio_outb(int base, int reg, int val)
{
outb(reg, base);
outb(val, base + 1);
}
static inline int superio_enter(int base)
{
/* Don't step on other drivers' I/O space by accident. */
if (!request_muxed_region(base, 2, DRVNAME)) {
pr_err(DRVNAME "I/O address 0x%04x already in use\n", base);
return -EBUSY;
}
/* According to the datasheet the key must be send twice. */
outb(SIO_UNLOCK_KEY, base);
outb(SIO_UNLOCK_KEY, base);
return 0;
}
static inline void superio_select(int base, int ld)
{
outb(SIO_LDSEL, base);
outb(ld, base + 1);
}
static inline void superio_exit(int base)
{
outb(SIO_LOCK_KEY, base);
release_region(base, 2);
}
/*
* GPIO chip.
*/
static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset);
static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset);
static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset);
static int f7188x_gpio_direction_out(struct gpio_chip *chip,
unsigned offset, int value);
static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value);
static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
unsigned long config);
#define F7188X_GPIO_BANK(_base, _ngpio, _regbase) \
{ \
.chip = { \
.label = DRVNAME, \
.owner = THIS_MODULE, \
.get_direction = f7188x_gpio_get_direction, \
.direction_input = f7188x_gpio_direction_in, \
.get = f7188x_gpio_get, \
.direction_output = f7188x_gpio_direction_out, \
.set = f7188x_gpio_set, \
.set_config = f7188x_gpio_set_config, \
.base = _base, \
.ngpio = _ngpio, \
.can_sleep = true, \
}, \
.regbase = _regbase, \
}
#define gpio_dir(base) (base + 0)
#define gpio_data_out(base) (base + 1)
#define gpio_data_in(base) (base + 2)
/* Output mode register (0:open drain 1:push-pull). */
#define gpio_out_mode(base) (base + 3)
static struct f7188x_gpio_bank f71869_gpio_bank[] = {
F7188X_GPIO_BANK(0, 6, 0xF0),
F7188X_GPIO_BANK(10, 8, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(30, 8, 0xC0),
F7188X_GPIO_BANK(40, 8, 0xB0),
F7188X_GPIO_BANK(50, 5, 0xA0),
F7188X_GPIO_BANK(60, 6, 0x90),
};
static struct f7188x_gpio_bank f71869a_gpio_bank[] = {
F7188X_GPIO_BANK(0, 6, 0xF0),
F7188X_GPIO_BANK(10, 8, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(30, 8, 0xC0),
F7188X_GPIO_BANK(40, 8, 0xB0),
F7188X_GPIO_BANK(50, 5, 0xA0),
F7188X_GPIO_BANK(60, 8, 0x90),
F7188X_GPIO_BANK(70, 8, 0x80),
};
static struct f7188x_gpio_bank f71882_gpio_bank[] = {
F7188X_GPIO_BANK(0, 8, 0xF0),
F7188X_GPIO_BANK(10, 8, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(30, 4, 0xC0),
F7188X_GPIO_BANK(40, 4, 0xB0),
};
static struct f7188x_gpio_bank f71889a_gpio_bank[] = {
F7188X_GPIO_BANK(0, 7, 0xF0),
F7188X_GPIO_BANK(10, 7, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(30, 8, 0xC0),
F7188X_GPIO_BANK(40, 8, 0xB0),
F7188X_GPIO_BANK(50, 5, 0xA0),
F7188X_GPIO_BANK(60, 8, 0x90),
F7188X_GPIO_BANK(70, 8, 0x80),
};
static struct f7188x_gpio_bank f71889_gpio_bank[] = {
F7188X_GPIO_BANK(0, 7, 0xF0),
F7188X_GPIO_BANK(10, 7, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(30, 8, 0xC0),
F7188X_GPIO_BANK(40, 8, 0xB0),
F7188X_GPIO_BANK(50, 5, 0xA0),
F7188X_GPIO_BANK(60, 8, 0x90),
F7188X_GPIO_BANK(70, 8, 0x80),
};
static struct f7188x_gpio_bank f81866_gpio_bank[] = {
F7188X_GPIO_BANK(0, 8, 0xF0),
F7188X_GPIO_BANK(10, 8, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(30, 8, 0xC0),
F7188X_GPIO_BANK(40, 8, 0xB0),
F7188X_GPIO_BANK(50, 8, 0xA0),
F7188X_GPIO_BANK(60, 8, 0x90),
F7188X_GPIO_BANK(70, 8, 0x80),
F7188X_GPIO_BANK(80, 8, 0x88),
};
static struct f7188x_gpio_bank f81804_gpio_bank[] = {
F7188X_GPIO_BANK(0, 8, 0xF0),
F7188X_GPIO_BANK(10, 8, 0xE0),
F7188X_GPIO_BANK(20, 8, 0xD0),
F7188X_GPIO_BANK(50, 8, 0xA0),
F7188X_GPIO_BANK(60, 8, 0x90),
F7188X_GPIO_BANK(70, 8, 0x80),
F7188X_GPIO_BANK(90, 8, 0x98),
};
static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
{
int err;
struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
struct f7188x_sio *sio = bank->data->sio;
u8 dir;
err = superio_enter(sio->addr);
if (err)
return err;
superio_select(sio->addr, SIO_LD_GPIO);
dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
superio_exit(sio->addr);
return !(dir & 1 << offset);
}
static int f7188x_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
{
int err;
struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
struct f7188x_sio *sio = bank->data->sio;
u8 dir;
err = superio_enter(sio->addr);
if (err)
return err;
superio_select(sio->addr, SIO_LD_GPIO);
dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
dir &= ~BIT(offset);
superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
superio_exit(sio->addr);
return 0;
}
static int f7188x_gpio_get(struct gpio_chip *chip, unsigned offset)
{
int err;
struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
struct f7188x_sio *sio = bank->data->sio;
u8 dir, data;
err = superio_enter(sio->addr);
if (err)
return err;
superio_select(sio->addr, SIO_LD_GPIO);
dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
dir = !!(dir & BIT(offset));
if (dir)
data = superio_inb(sio->addr, gpio_data_out(bank->regbase));
else
data = superio_inb(sio->addr, gpio_data_in(bank->regbase));
superio_exit(sio->addr);
return !!(data & BIT(offset));
}
static int f7188x_gpio_direction_out(struct gpio_chip *chip,
unsigned offset, int value)
{
int err;
struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
struct f7188x_sio *sio = bank->data->sio;
u8 dir, data_out;
err = superio_enter(sio->addr);
if (err)
return err;
superio_select(sio->addr, SIO_LD_GPIO);
data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
if (value)
data_out |= BIT(offset);
else
data_out &= ~BIT(offset);
superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
dir = superio_inb(sio->addr, gpio_dir(bank->regbase));
dir |= BIT(offset);
superio_outb(sio->addr, gpio_dir(bank->regbase), dir);
superio_exit(sio->addr);
return 0;
}
static void f7188x_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
int err;
struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
struct f7188x_sio *sio = bank->data->sio;
u8 data_out;
err = superio_enter(sio->addr);
if (err)
return;
superio_select(sio->addr, SIO_LD_GPIO);
data_out = superio_inb(sio->addr, gpio_data_out(bank->regbase));
if (value)
data_out |= BIT(offset);
else
data_out &= ~BIT(offset);
superio_outb(sio->addr, gpio_data_out(bank->regbase), data_out);
superio_exit(sio->addr);
}
static int f7188x_gpio_set_config(struct gpio_chip *chip, unsigned offset,
unsigned long config)
{
int err;
enum pin_config_param param = pinconf_to_config_param(config);
struct f7188x_gpio_bank *bank = gpiochip_get_data(chip);
struct f7188x_sio *sio = bank->data->sio;
u8 data;
if (param != PIN_CONFIG_DRIVE_OPEN_DRAIN &&
param != PIN_CONFIG_DRIVE_PUSH_PULL)
return -ENOTSUPP;
err = superio_enter(sio->addr);
if (err)
return err;
superio_select(sio->addr, SIO_LD_GPIO);
data = superio_inb(sio->addr, gpio_out_mode(bank->regbase));
if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN)
data &= ~BIT(offset);
else
data |= BIT(offset);
superio_outb(sio->addr, gpio_out_mode(bank->regbase), data);
superio_exit(sio->addr);
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;
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;
err = superio_enter(addr);
if (err)
return err;
err = -ENODEV;
devid = superio_inw(addr, SIO_MANID);
if (devid != SIO_FINTEK_ID) {
pr_debug(DRVNAME ": Not a Fintek device at 0x%08x\n", addr);
goto err;
}
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;
default:
pr_info(DRVNAME ": Unsupported Fintek device 0x%04x\n", devid);
goto err;
}
sio->addr = addr;
err = 0;
pr_info(DRVNAME ": Found %s at %#x, revision %d\n",
f7188x_names[sio->type],
(unsigned int) addr,
(int) superio_inb(addr, SIO_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(DRVNAME "Platform data allocation failed\n");
goto err;
}
err = platform_device_add(f7188x_gpio_pdev);
if (err) {
pr_err(DRVNAME "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");
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