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tegrakernel/kernel/kernel-4.9/arch/arm/plat-samsung/gpio-samsung.c

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initial commit tegra kernel 32.6.1
2022-02-16 09:13:02 -06:00
/*
* Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* SAMSUNG - GPIOlib support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/ioport.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/of_address.h>
#include <asm/irq.h>
#include <mach/irqs.h>
#include <mach/map.h>
#include <mach/regs-gpio.h>
#include <mach/gpio-samsung.h>
#include <plat/cpu.h>
#include <plat/gpio-core.h>
#include <plat/gpio-cfg.h>
#include <plat/gpio-cfg-helpers.h>
#include <plat/pm.h>
int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull)
{
void __iomem *reg = chip->base + 0x08;
int shift = off * 2;
u32 pup;
pup = __raw_readl(reg);
pup &= ~(3 << shift);
pup |= pull << shift;
__raw_writel(pup, reg);
return 0;
}
samsung_gpio_pull_t samsung_gpio_getpull_updown(struct samsung_gpio_chip *chip,
unsigned int off)
{
void __iomem *reg = chip->base + 0x08;
int shift = off * 2;
u32 pup = __raw_readl(reg);
pup >>= shift;
pup &= 0x3;
return (__force samsung_gpio_pull_t)pup;
}
int s3c2443_gpio_setpull(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull)
{
switch (pull) {
case S3C_GPIO_PULL_NONE:
pull = 0x01;
break;
case S3C_GPIO_PULL_UP:
pull = 0x00;
break;
case S3C_GPIO_PULL_DOWN:
pull = 0x02;
break;
}
return samsung_gpio_setpull_updown(chip, off, pull);
}
samsung_gpio_pull_t s3c2443_gpio_getpull(struct samsung_gpio_chip *chip,
unsigned int off)
{
samsung_gpio_pull_t pull;
pull = samsung_gpio_getpull_updown(chip, off);
switch (pull) {
case 0x00:
pull = S3C_GPIO_PULL_UP;
break;
case 0x01:
case 0x03:
pull = S3C_GPIO_PULL_NONE;
break;
case 0x02:
pull = S3C_GPIO_PULL_DOWN;
break;
}
return pull;
}
static int s3c24xx_gpio_setpull_1(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull,
samsung_gpio_pull_t updown)
{
void __iomem *reg = chip->base + 0x08;
u32 pup = __raw_readl(reg);
if (pull == updown)
pup &= ~(1 << off);
else if (pull == S3C_GPIO_PULL_NONE)
pup |= (1 << off);
else
return -EINVAL;
__raw_writel(pup, reg);
return 0;
}
static samsung_gpio_pull_t s3c24xx_gpio_getpull_1(struct samsung_gpio_chip *chip,
unsigned int off,
samsung_gpio_pull_t updown)
{
void __iomem *reg = chip->base + 0x08;
u32 pup = __raw_readl(reg);
pup &= (1 << off);
return pup ? S3C_GPIO_PULL_NONE : updown;
}
samsung_gpio_pull_t s3c24xx_gpio_getpull_1up(struct samsung_gpio_chip *chip,
unsigned int off)
{
return s3c24xx_gpio_getpull_1(chip, off, S3C_GPIO_PULL_UP);
}
int s3c24xx_gpio_setpull_1up(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull)
{
return s3c24xx_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_UP);
}
samsung_gpio_pull_t s3c24xx_gpio_getpull_1down(struct samsung_gpio_chip *chip,
unsigned int off)
{
return s3c24xx_gpio_getpull_1(chip, off, S3C_GPIO_PULL_DOWN);
}
int s3c24xx_gpio_setpull_1down(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull)
{
return s3c24xx_gpio_setpull_1(chip, off, pull, S3C_GPIO_PULL_DOWN);
}
/*
* samsung_gpio_setcfg_2bit - Samsung 2bit style GPIO configuration.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @cfg: The configuration value to set.
*
* This helper deal with the GPIO cases where the control register
* has two bits of configuration per gpio, which have the following
* functions:
* 00 = input
* 01 = output
* 1x = special function
*/
static int samsung_gpio_setcfg_2bit(struct samsung_gpio_chip *chip,
unsigned int off, unsigned int cfg)
{
void __iomem *reg = chip->base;
unsigned int shift = off * 2;
u32 con;
if (samsung_gpio_is_cfg_special(cfg)) {
cfg &= 0xf;
if (cfg > 3)
return -EINVAL;
cfg <<= shift;
}
con = __raw_readl(reg);
con &= ~(0x3 << shift);
con |= cfg;
__raw_writel(con, reg);
return 0;
}
/*
* samsung_gpio_getcfg_2bit - Samsung 2bit style GPIO configuration read.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
*
* The reverse of samsung_gpio_setcfg_2bit(). Will return a value which
* could be directly passed back to samsung_gpio_setcfg_2bit(), from the
* S3C_GPIO_SPECIAL() macro.
*/
static unsigned int samsung_gpio_getcfg_2bit(struct samsung_gpio_chip *chip,
unsigned int off)
{
u32 con;
con = __raw_readl(chip->base);
con >>= off * 2;
con &= 3;
/* this conversion works for IN and OUT as well as special mode */
return S3C_GPIO_SPECIAL(con);
}
/*
* samsung_gpio_setcfg_4bit - Samsung 4bit single register GPIO config.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @cfg: The configuration value to set.
*
* This helper deal with the GPIO cases where the control register has 4 bits
* of control per GPIO, generally in the form of:
* 0000 = Input
* 0001 = Output
* others = Special functions (dependent on bank)
*
* Note, since the code to deal with the case where there are two control
* registers instead of one, we do not have a separate set of functions for
* each case.
*/
static int samsung_gpio_setcfg_4bit(struct samsung_gpio_chip *chip,
unsigned int off, unsigned int cfg)
{
void __iomem *reg = chip->base;
unsigned int shift = (off & 7) * 4;
u32 con;
if (off < 8 && chip->chip.ngpio > 8)
reg -= 4;
if (samsung_gpio_is_cfg_special(cfg)) {
cfg &= 0xf;
cfg <<= shift;
}
con = __raw_readl(reg);
con &= ~(0xf << shift);
con |= cfg;
__raw_writel(con, reg);
return 0;
}
/*
* samsung_gpio_getcfg_4bit - Samsung 4bit single register GPIO config read.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
*
* The reverse of samsung_gpio_setcfg_4bit(), turning a gpio configuration
* register setting into a value the software can use, such as could be passed
* to samsung_gpio_setcfg_4bit().
*
* @sa samsung_gpio_getcfg_2bit
*/
static unsigned samsung_gpio_getcfg_4bit(struct samsung_gpio_chip *chip,
unsigned int off)
{
void __iomem *reg = chip->base;
unsigned int shift = (off & 7) * 4;
u32 con;
if (off < 8 && chip->chip.ngpio > 8)
reg -= 4;
con = __raw_readl(reg);
con >>= shift;
con &= 0xf;
/* this conversion works for IN and OUT as well as special mode */
return S3C_GPIO_SPECIAL(con);
}
#ifdef CONFIG_PLAT_S3C24XX
/*
* s3c24xx_gpio_setcfg_abank - S3C24XX style GPIO configuration (Bank A)
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @cfg: The configuration value to set.
*
* This helper deal with the GPIO cases where the control register
* has one bit of configuration for the gpio, where setting the bit
* means the pin is in special function mode and unset means output.
*/
static int s3c24xx_gpio_setcfg_abank(struct samsung_gpio_chip *chip,
unsigned int off, unsigned int cfg)
{
void __iomem *reg = chip->base;
unsigned int shift = off;
u32 con;
if (samsung_gpio_is_cfg_special(cfg)) {
cfg &= 0xf;
/* Map output to 0, and SFN2 to 1 */
cfg -= 1;
if (cfg > 1)
return -EINVAL;
cfg <<= shift;
}
con = __raw_readl(reg);
con &= ~(0x1 << shift);
con |= cfg;
__raw_writel(con, reg);
return 0;
}
/*
* s3c24xx_gpio_getcfg_abank - S3C24XX style GPIO configuration read (Bank A)
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
*
* The reverse of s3c24xx_gpio_setcfg_abank() turning an GPIO into a usable
* GPIO configuration value.
*
* @sa samsung_gpio_getcfg_2bit
* @sa samsung_gpio_getcfg_4bit
*/
static unsigned s3c24xx_gpio_getcfg_abank(struct samsung_gpio_chip *chip,
unsigned int off)
{
u32 con;
con = __raw_readl(chip->base);
con >>= off;
con &= 1;
con++;
return S3C_GPIO_SFN(con);
}
#endif
static void __init samsung_gpiolib_set_cfg(struct samsung_gpio_cfg *chipcfg,
int nr_chips)
{
for (; nr_chips > 0; nr_chips--, chipcfg++) {
if (!chipcfg->set_config)
chipcfg->set_config = samsung_gpio_setcfg_4bit;
if (!chipcfg->get_config)
chipcfg->get_config = samsung_gpio_getcfg_4bit;
if (!chipcfg->set_pull)
chipcfg->set_pull = samsung_gpio_setpull_updown;
if (!chipcfg->get_pull)
chipcfg->get_pull = samsung_gpio_getpull_updown;
}
}
struct samsung_gpio_cfg s3c24xx_gpiocfg_default = {
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
};
#ifdef CONFIG_PLAT_S3C24XX
static struct samsung_gpio_cfg s3c24xx_gpiocfg_banka = {
.set_config = s3c24xx_gpio_setcfg_abank,
.get_config = s3c24xx_gpio_getcfg_abank,
};
#endif
static struct samsung_gpio_cfg samsung_gpio_cfgs[] = {
[0] = {
.cfg_eint = 0x0,
},
[1] = {
.cfg_eint = 0x3,
},
[2] = {
.cfg_eint = 0x7,
},
[3] = {
.cfg_eint = 0xF,
},
[4] = {
.cfg_eint = 0x0,
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
},
[5] = {
.cfg_eint = 0x2,
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
},
[6] = {
.cfg_eint = 0x3,
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
},
[7] = {
.set_config = samsung_gpio_setcfg_2bit,
.get_config = samsung_gpio_getcfg_2bit,
},
};
/*
* Default routines for controlling GPIO, based on the original S3C24XX
* GPIO functions which deal with the case where each gpio bank of the
* chip is as following:
*
* base + 0x00: Control register, 2 bits per gpio
* gpio n: 2 bits starting at (2*n)
* 00 = input, 01 = output, others mean special-function
* base + 0x04: Data register, 1 bit per gpio
* bit n: data bit n
*/
static int samsung_gpiolib_2bit_input(struct gpio_chip *chip, unsigned offset)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
void __iomem *base = ourchip->base;
unsigned long flags;
unsigned long con;
samsung_gpio_lock(ourchip, flags);
con = __raw_readl(base + 0x00);
con &= ~(3 << (offset * 2));
__raw_writel(con, base + 0x00);
samsung_gpio_unlock(ourchip, flags);
return 0;
}
static int samsung_gpiolib_2bit_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
void __iomem *base = ourchip->base;
unsigned long flags;
unsigned long dat;
unsigned long con;
samsung_gpio_lock(ourchip, flags);
dat = __raw_readl(base + 0x04);
dat &= ~(1 << offset);
if (value)
dat |= 1 << offset;
__raw_writel(dat, base + 0x04);
con = __raw_readl(base + 0x00);
con &= ~(3 << (offset * 2));
con |= 1 << (offset * 2);
__raw_writel(con, base + 0x00);
__raw_writel(dat, base + 0x04);
samsung_gpio_unlock(ourchip, flags);
return 0;
}
/*
* The samsung_gpiolib_4bit routines are to control the gpio banks where
* the gpio configuration register (GPxCON) has 4 bits per GPIO, as the
* following example:
*
* base + 0x00: Control register, 4 bits per gpio
* gpio n: 4 bits starting at (4*n)
* 0000 = input, 0001 = output, others mean special-function
* base + 0x04: Data register, 1 bit per gpio
* bit n: data bit n
*
* Note, since the data register is one bit per gpio and is at base + 0x4
* we can use samsung_gpiolib_get and samsung_gpiolib_set to change the
* state of the output.
*/
static int samsung_gpiolib_4bit_input(struct gpio_chip *chip,
unsigned int offset)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
void __iomem *base = ourchip->base;
unsigned long con;
con = __raw_readl(base + GPIOCON_OFF);
if (ourchip->bitmap_gpio_int & BIT(offset))
con |= 0xf << con_4bit_shift(offset);
else
con &= ~(0xf << con_4bit_shift(offset));
__raw_writel(con, base + GPIOCON_OFF);
pr_debug("%s: %p: CON now %08lx\n", __func__, base, con);
return 0;
}
static int samsung_gpiolib_4bit_output(struct gpio_chip *chip,
unsigned int offset, int value)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
void __iomem *base = ourchip->base;
unsigned long con;
unsigned long dat;
con = __raw_readl(base + GPIOCON_OFF);
con &= ~(0xf << con_4bit_shift(offset));
con |= 0x1 << con_4bit_shift(offset);
dat = __raw_readl(base + GPIODAT_OFF);
if (value)
dat |= 1 << offset;
else
dat &= ~(1 << offset);
__raw_writel(dat, base + GPIODAT_OFF);
__raw_writel(con, base + GPIOCON_OFF);
__raw_writel(dat, base + GPIODAT_OFF);
pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
return 0;
}
/*
* The next set of routines are for the case where the GPIO configuration
* registers are 4 bits per GPIO but there is more than one register (the
* bank has more than 8 GPIOs.
*
* This case is the similar to the 4 bit case, but the registers are as
* follows:
*
* base + 0x00: Control register, 4 bits per gpio (lower 8 GPIOs)
* gpio n: 4 bits starting at (4*n)
* 0000 = input, 0001 = output, others mean special-function
* base + 0x04: Control register, 4 bits per gpio (up to 8 additions GPIOs)
* gpio n: 4 bits starting at (4*n)
* 0000 = input, 0001 = output, others mean special-function
* base + 0x08: Data register, 1 bit per gpio
* bit n: data bit n
*
* To allow us to use the samsung_gpiolib_get and samsung_gpiolib_set
* routines we store the 'base + 0x4' address so that these routines see
* the data register at ourchip->base + 0x04.
*/
static int samsung_gpiolib_4bit2_input(struct gpio_chip *chip,
unsigned int offset)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
void __iomem *base = ourchip->base;
void __iomem *regcon = base;
unsigned long con;
if (offset > 7)
offset -= 8;
else
regcon -= 4;
con = __raw_readl(regcon);
con &= ~(0xf << con_4bit_shift(offset));
__raw_writel(con, regcon);
pr_debug("%s: %p: CON %08lx\n", __func__, base, con);
return 0;
}
static int samsung_gpiolib_4bit2_output(struct gpio_chip *chip,
unsigned int offset, int value)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
void __iomem *base = ourchip->base;
void __iomem *regcon = base;
unsigned long con;
unsigned long dat;
unsigned con_offset = offset;
if (con_offset > 7)
con_offset -= 8;
else
regcon -= 4;
con = __raw_readl(regcon);
con &= ~(0xf << con_4bit_shift(con_offset));
con |= 0x1 << con_4bit_shift(con_offset);
dat = __raw_readl(base + GPIODAT_OFF);
if (value)
dat |= 1 << offset;
else
dat &= ~(1 << offset);
__raw_writel(dat, base + GPIODAT_OFF);
__raw_writel(con, regcon);
__raw_writel(dat, base + GPIODAT_OFF);
pr_debug("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
return 0;
}
#ifdef CONFIG_PLAT_S3C24XX
/* The next set of routines are for the case of s3c24xx bank a */
static int s3c24xx_gpiolib_banka_input(struct gpio_chip *chip, unsigned offset)
{
return -EINVAL;
}
static int s3c24xx_gpiolib_banka_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
void __iomem *base = ourchip->base;
unsigned long flags;
unsigned long dat;
unsigned long con;
local_irq_save(flags);
con = __raw_readl(base + 0x00);
dat = __raw_readl(base + 0x04);
dat &= ~(1 << offset);
if (value)
dat |= 1 << offset;
__raw_writel(dat, base + 0x04);
con &= ~(1 << offset);
__raw_writel(con, base + 0x00);
__raw_writel(dat, base + 0x04);
local_irq_restore(flags);
return 0;
}
#endif
static void samsung_gpiolib_set(struct gpio_chip *chip,
unsigned offset, int value)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
void __iomem *base = ourchip->base;
unsigned long flags;
unsigned long dat;
samsung_gpio_lock(ourchip, flags);
dat = __raw_readl(base + 0x04);
dat &= ~(1 << offset);
if (value)
dat |= 1 << offset;
__raw_writel(dat, base + 0x04);
samsung_gpio_unlock(ourchip, flags);
}
static int samsung_gpiolib_get(struct gpio_chip *chip, unsigned offset)
{
struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
unsigned long val;
val = __raw_readl(ourchip->base + 0x04);
val >>= offset;
val &= 1;
return val;
}
/*
* CONFIG_S3C_GPIO_TRACK enables the tracking of the s3c specific gpios
* for use with the configuration calls, and other parts of the s3c gpiolib
* support code.
*
* Not all s3c support code will need this, as some configurations of cpu
* may only support one or two different configuration options and have an
* easy gpio to samsung_gpio_chip mapping function. If this is the case, then
* the machine support file should provide its own samsung_gpiolib_getchip()
* and any other necessary functions.
*/
#ifdef CONFIG_S3C_GPIO_TRACK
struct samsung_gpio_chip *s3c_gpios[S3C_GPIO_END];
static __init void s3c_gpiolib_track(struct samsung_gpio_chip *chip)
{
unsigned int gpn;
int i;
gpn = chip->chip.base;
for (i = 0; i < chip->chip.ngpio; i++, gpn++) {
BUG_ON(gpn >= ARRAY_SIZE(s3c_gpios));
s3c_gpios[gpn] = chip;
}
}
#endif /* CONFIG_S3C_GPIO_TRACK */
/*
* samsung_gpiolib_add() - add the Samsung gpio_chip.
* @chip: The chip to register
*
* This is a wrapper to gpiochip_add() that takes our specific gpio chip
* information and makes the necessary alterations for the platform and
* notes the information for use with the configuration systems and any
* other parts of the system.
*/
static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip)
{
struct gpio_chip *gc = &chip->chip;
int ret;
BUG_ON(!chip->base);
BUG_ON(!gc->label);
BUG_ON(!gc->ngpio);
spin_lock_init(&chip->lock);
if (!gc->direction_input)
gc->direction_input = samsung_gpiolib_2bit_input;
if (!gc->direction_output)
gc->direction_output = samsung_gpiolib_2bit_output;
if (!gc->set)
gc->set = samsung_gpiolib_set;
if (!gc->get)
gc->get = samsung_gpiolib_get;
#ifdef CONFIG_PM
if (chip->pm != NULL) {
if (!chip->pm->save || !chip->pm->resume)
pr_err("gpio: %s has missing PM functions\n",
gc->label);
} else
pr_err("gpio: %s has no PM function\n", gc->label);
#endif
/* gpiochip_add() prints own failure message on error. */
ret = gpiochip_add_data(gc, chip);
if (ret >= 0)
s3c_gpiolib_track(chip);
}
static void __init s3c24xx_gpiolib_add_chips(struct samsung_gpio_chip *chip,
int nr_chips, void __iomem *base)
{
int i;
struct gpio_chip *gc = &chip->chip;
for (i = 0 ; i < nr_chips; i++, chip++) {
/* skip banks not present on SoC */
if (chip->chip.base >= S3C_GPIO_END)
continue;
if (!chip->config)
chip->config = &s3c24xx_gpiocfg_default;
if (!chip->pm)
chip->pm = __gpio_pm(&samsung_gpio_pm_2bit);
if ((base != NULL) && (chip->base == NULL))
chip->base = base + ((i) * 0x10);
if (!gc->direction_input)
gc->direction_input = samsung_gpiolib_2bit_input;
if (!gc->direction_output)
gc->direction_output = samsung_gpiolib_2bit_output;
samsung_gpiolib_add(chip);
}
}
static void __init samsung_gpiolib_add_2bit_chips(struct samsung_gpio_chip *chip,
int nr_chips, void __iomem *base,
unsigned int offset)
{
int i;
for (i = 0 ; i < nr_chips; i++, chip++) {
chip->chip.direction_input = samsung_gpiolib_2bit_input;
chip->chip.direction_output = samsung_gpiolib_2bit_output;
if (!chip->config)
chip->config = &samsung_gpio_cfgs[7];
if (!chip->pm)
chip->pm = __gpio_pm(&samsung_gpio_pm_2bit);
if ((base != NULL) && (chip->base == NULL))
chip->base = base + ((i) * offset);
samsung_gpiolib_add(chip);
}
}
/*
* samsung_gpiolib_add_4bit_chips - 4bit single register GPIO config.
* @chip: The gpio chip that is being configured.
* @nr_chips: The no of chips (gpio ports) for the GPIO being configured.
*
* This helper deal with the GPIO cases where the control register has 4 bits
* of control per GPIO, generally in the form of:
* 0000 = Input
* 0001 = Output
* others = Special functions (dependent on bank)
*
* Note, since the code to deal with the case where there are two control
* registers instead of one, we do not have a separate set of function
* (samsung_gpiolib_add_4bit2_chips)for each case.
*/
static void __init samsung_gpiolib_add_4bit_chips(struct samsung_gpio_chip *chip,
int nr_chips, void __iomem *base)
{
int i;
for (i = 0 ; i < nr_chips; i++, chip++) {
chip->chip.direction_input = samsung_gpiolib_4bit_input;
chip->chip.direction_output = samsung_gpiolib_4bit_output;
if (!chip->config)
chip->config = &samsung_gpio_cfgs[2];
if (!chip->pm)
chip->pm = __gpio_pm(&samsung_gpio_pm_4bit);
if ((base != NULL) && (chip->base == NULL))
chip->base = base + ((i) * 0x20);
chip->bitmap_gpio_int = 0;
samsung_gpiolib_add(chip);
}
}
static void __init samsung_gpiolib_add_4bit2_chips(struct samsung_gpio_chip *chip,
int nr_chips)
{
for (; nr_chips > 0; nr_chips--, chip++) {
chip->chip.direction_input = samsung_gpiolib_4bit2_input;
chip->chip.direction_output = samsung_gpiolib_4bit2_output;
if (!chip->config)
chip->config = &samsung_gpio_cfgs[2];
if (!chip->pm)
chip->pm = __gpio_pm(&samsung_gpio_pm_4bit);
samsung_gpiolib_add(chip);
}
}
int samsung_gpiolib_to_irq(struct gpio_chip *chip, unsigned int offset)
{
struct samsung_gpio_chip *samsung_chip = gpiochip_get_data(chip);
return samsung_chip->irq_base + offset;
}
#ifdef CONFIG_PLAT_S3C24XX
static int s3c24xx_gpiolib_fbank_to_irq(struct gpio_chip *chip, unsigned offset)
{
if (offset < 4) {
if (soc_is_s3c2412())
return IRQ_EINT0_2412 + offset;
else
return IRQ_EINT0 + offset;
}
if (offset < 8)
return IRQ_EINT4 + offset - 4;
return -EINVAL;
}
#endif
#ifdef CONFIG_ARCH_S3C64XX
static int s3c64xx_gpiolib_mbank_to_irq(struct gpio_chip *chip, unsigned pin)
{
return pin < 5 ? IRQ_EINT(23) + pin : -ENXIO;
}
static int s3c64xx_gpiolib_lbank_to_irq(struct gpio_chip *chip, unsigned pin)
{
return pin >= 8 ? IRQ_EINT(16) + pin - 8 : -ENXIO;
}
#endif
struct samsung_gpio_chip s3c24xx_gpios[] = {
#ifdef CONFIG_PLAT_S3C24XX
{
.config = &s3c24xx_gpiocfg_banka,
.chip = {
.base = S3C2410_GPA(0),
.owner = THIS_MODULE,
.label = "GPIOA",
.ngpio = 27,
.direction_input = s3c24xx_gpiolib_banka_input,
.direction_output = s3c24xx_gpiolib_banka_output,
},
}, {
.chip = {
.base = S3C2410_GPB(0),
.owner = THIS_MODULE,
.label = "GPIOB",
.ngpio = 11,
},
}, {
.chip = {
.base = S3C2410_GPC(0),
.owner = THIS_MODULE,
.label = "GPIOC",
.ngpio = 16,
},
}, {
.chip = {
.base = S3C2410_GPD(0),
.owner = THIS_MODULE,
.label = "GPIOD",
.ngpio = 16,
},
}, {
.chip = {
.base = S3C2410_GPE(0),
.label = "GPIOE",
.owner = THIS_MODULE,
.ngpio = 16,
},
}, {
.chip = {
.base = S3C2410_GPF(0),
.owner = THIS_MODULE,
.label = "GPIOF",
.ngpio = 8,
.to_irq = s3c24xx_gpiolib_fbank_to_irq,
},
}, {
.irq_base = IRQ_EINT8,
.chip = {
.base = S3C2410_GPG(0),
.owner = THIS_MODULE,
.label = "GPIOG",
.ngpio = 16,
.to_irq = samsung_gpiolib_to_irq,
},
}, {
.chip = {
.base = S3C2410_GPH(0),
.owner = THIS_MODULE,
.label = "GPIOH",
.ngpio = 15,
},
},
/* GPIOS for the S3C2443 and later devices. */
{
.base = S3C2440_GPJCON,
.chip = {
.base = S3C2410_GPJ(0),
.owner = THIS_MODULE,
.label = "GPIOJ",
.ngpio = 16,
},
}, {
.base = S3C2443_GPKCON,
.chip = {
.base = S3C2410_GPK(0),
.owner = THIS_MODULE,
.label = "GPIOK",
.ngpio = 16,
},
}, {
.base = S3C2443_GPLCON,
.chip = {
.base = S3C2410_GPL(0),
.owner = THIS_MODULE,
.label = "GPIOL",
.ngpio = 15,
},
}, {
.base = S3C2443_GPMCON,
.chip = {
.base = S3C2410_GPM(0),
.owner = THIS_MODULE,
.label = "GPIOM",
.ngpio = 2,
},
},
#endif
};
/*
* GPIO bank summary:
*
* Bank GPIOs Style SlpCon ExtInt Group
* A 8 4Bit Yes 1
* B 7 4Bit Yes 1
* C 8 4Bit Yes 2
* D 5 4Bit Yes 3
* E 5 4Bit Yes None
* F 16 2Bit Yes 4 [1]
* G 7 4Bit Yes 5
* H 10 4Bit[2] Yes 6
* I 16 2Bit Yes None
* J 12 2Bit Yes None
* K 16 4Bit[2] No None
* L 15 4Bit[2] No None
* M 6 4Bit No IRQ_EINT
* N 16 2Bit No IRQ_EINT
* O 16 2Bit Yes 7
* P 15 2Bit Yes 8
* Q 9 2Bit Yes 9
*
* [1] BANKF pins 14,15 do not form part of the external interrupt sources
* [2] BANK has two control registers, GPxCON0 and GPxCON1
*/
static struct samsung_gpio_chip s3c64xx_gpios_4bit[] = {
#ifdef CONFIG_ARCH_S3C64XX
{
.chip = {
.base = S3C64XX_GPA(0),
.ngpio = S3C64XX_GPIO_A_NR,
.label = "GPA",
},
}, {
.chip = {
.base = S3C64XX_GPB(0),
.ngpio = S3C64XX_GPIO_B_NR,
.label = "GPB",
},
}, {
.chip = {
.base = S3C64XX_GPC(0),
.ngpio = S3C64XX_GPIO_C_NR,
.label = "GPC",
},
}, {
.chip = {
.base = S3C64XX_GPD(0),
.ngpio = S3C64XX_GPIO_D_NR,
.label = "GPD",
},
}, {
.config = &samsung_gpio_cfgs[0],
.chip = {
.base = S3C64XX_GPE(0),
.ngpio = S3C64XX_GPIO_E_NR,
.label = "GPE",
},
}, {
.base = S3C64XX_GPG_BASE,
.chip = {
.base = S3C64XX_GPG(0),
.ngpio = S3C64XX_GPIO_G_NR,
.label = "GPG",
},
}, {
.base = S3C64XX_GPM_BASE,
.config = &samsung_gpio_cfgs[1],
.chip = {
.base = S3C64XX_GPM(0),
.ngpio = S3C64XX_GPIO_M_NR,
.label = "GPM",
.to_irq = s3c64xx_gpiolib_mbank_to_irq,
},
},
#endif
};
static struct samsung_gpio_chip s3c64xx_gpios_4bit2[] = {
#ifdef CONFIG_ARCH_S3C64XX
{
.base = S3C64XX_GPH_BASE + 0x4,
.chip = {
.base = S3C64XX_GPH(0),
.ngpio = S3C64XX_GPIO_H_NR,
.label = "GPH",
},
}, {
.base = S3C64XX_GPK_BASE + 0x4,
.config = &samsung_gpio_cfgs[0],
.chip = {
.base = S3C64XX_GPK(0),
.ngpio = S3C64XX_GPIO_K_NR,
.label = "GPK",
},
}, {
.base = S3C64XX_GPL_BASE + 0x4,
.config = &samsung_gpio_cfgs[1],
.chip = {
.base = S3C64XX_GPL(0),
.ngpio = S3C64XX_GPIO_L_NR,
.label = "GPL",
.to_irq = s3c64xx_gpiolib_lbank_to_irq,
},
},
#endif
};
static struct samsung_gpio_chip s3c64xx_gpios_2bit[] = {
#ifdef CONFIG_ARCH_S3C64XX
{
.base = S3C64XX_GPF_BASE,
.config = &samsung_gpio_cfgs[6],
.chip = {
.base = S3C64XX_GPF(0),
.ngpio = S3C64XX_GPIO_F_NR,
.label = "GPF",
},
}, {
.config = &samsung_gpio_cfgs[7],
.chip = {
.base = S3C64XX_GPI(0),
.ngpio = S3C64XX_GPIO_I_NR,
.label = "GPI",
},
}, {
.config = &samsung_gpio_cfgs[7],
.chip = {
.base = S3C64XX_GPJ(0),
.ngpio = S3C64XX_GPIO_J_NR,
.label = "GPJ",
},
}, {
.config = &samsung_gpio_cfgs[6],
.chip = {
.base = S3C64XX_GPO(0),
.ngpio = S3C64XX_GPIO_O_NR,
.label = "GPO",
},
}, {
.config = &samsung_gpio_cfgs[6],
.chip = {
.base = S3C64XX_GPP(0),
.ngpio = S3C64XX_GPIO_P_NR,
.label = "GPP",
},
}, {
.config = &samsung_gpio_cfgs[6],
.chip = {
.base = S3C64XX_GPQ(0),
.ngpio = S3C64XX_GPIO_Q_NR,
.label = "GPQ",
},
}, {
.base = S3C64XX_GPN_BASE,
.irq_base = IRQ_EINT(0),
.config = &samsung_gpio_cfgs[5],
.chip = {
.base = S3C64XX_GPN(0),
.ngpio = S3C64XX_GPIO_N_NR,
.label = "GPN",
.to_irq = samsung_gpiolib_to_irq,
},
},
#endif
};
/* TODO: cleanup soc_is_* */
static __init int samsung_gpiolib_init(void)
{
/*
* Currently there are two drivers that can provide GPIO support for
* Samsung SoCs. For device tree enabled platforms, the new
* pinctrl-samsung driver is used, providing both GPIO and pin control
* interfaces. For legacy (non-DT) platforms this driver is used.
*/
if (of_have_populated_dt())
return 0;
if (soc_is_s3c24xx()) {
samsung_gpiolib_set_cfg(samsung_gpio_cfgs,
ARRAY_SIZE(samsung_gpio_cfgs));
s3c24xx_gpiolib_add_chips(s3c24xx_gpios,
ARRAY_SIZE(s3c24xx_gpios), S3C24XX_VA_GPIO);
} else if (soc_is_s3c64xx()) {
samsung_gpiolib_set_cfg(samsung_gpio_cfgs,
ARRAY_SIZE(samsung_gpio_cfgs));
samsung_gpiolib_add_2bit_chips(s3c64xx_gpios_2bit,
ARRAY_SIZE(s3c64xx_gpios_2bit),
S3C64XX_VA_GPIO + 0xE0, 0x20);
samsung_gpiolib_add_4bit_chips(s3c64xx_gpios_4bit,
ARRAY_SIZE(s3c64xx_gpios_4bit),
S3C64XX_VA_GPIO);
samsung_gpiolib_add_4bit2_chips(s3c64xx_gpios_4bit2,
ARRAY_SIZE(s3c64xx_gpios_4bit2));
}
return 0;
}
core_initcall(samsung_gpiolib_init);
int s3c_gpio_cfgpin(unsigned int pin, unsigned int config)
{
struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
unsigned long flags;
int offset;
int ret;
if (!chip)
return -EINVAL;
offset = pin - chip->chip.base;
samsung_gpio_lock(chip, flags);
ret = samsung_gpio_do_setcfg(chip, offset, config);
samsung_gpio_unlock(chip, flags);
return ret;
}
EXPORT_SYMBOL(s3c_gpio_cfgpin);
int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr,
unsigned int cfg)
{
int ret;
for (; nr > 0; nr--, start++) {
ret = s3c_gpio_cfgpin(start, cfg);
if (ret != 0)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(s3c_gpio_cfgpin_range);
int s3c_gpio_cfgall_range(unsigned int start, unsigned int nr,
unsigned int cfg, samsung_gpio_pull_t pull)
{
int ret;
for (; nr > 0; nr--, start++) {
s3c_gpio_setpull(start, pull);
ret = s3c_gpio_cfgpin(start, cfg);
if (ret != 0)
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(s3c_gpio_cfgall_range);
unsigned s3c_gpio_getcfg(unsigned int pin)
{
struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
unsigned long flags;
unsigned ret = 0;
int offset;
if (chip) {
offset = pin - chip->chip.base;
samsung_gpio_lock(chip, flags);
ret = samsung_gpio_do_getcfg(chip, offset);
samsung_gpio_unlock(chip, flags);
}
return ret;
}
EXPORT_SYMBOL(s3c_gpio_getcfg);
int s3c_gpio_setpull(unsigned int pin, samsung_gpio_pull_t pull)
{
struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
unsigned long flags;
int offset, ret;
if (!chip)
return -EINVAL;
offset = pin - chip->chip.base;
samsung_gpio_lock(chip, flags);
ret = samsung_gpio_do_setpull(chip, offset, pull);
samsung_gpio_unlock(chip, flags);
return ret;
}
EXPORT_SYMBOL(s3c_gpio_setpull);
samsung_gpio_pull_t s3c_gpio_getpull(unsigned int pin)
{
struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
unsigned long flags;
int offset;
u32 pup = 0;
if (chip) {
offset = pin - chip->chip.base;
samsung_gpio_lock(chip, flags);
pup = samsung_gpio_do_getpull(chip, offset);
samsung_gpio_unlock(chip, flags);
}
return (__force samsung_gpio_pull_t)pup;
}
EXPORT_SYMBOL(s3c_gpio_getpull);
#ifdef CONFIG_PLAT_S3C24XX
unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)
{
unsigned long flags;
unsigned long misccr;
local_irq_save(flags);
misccr = __raw_readl(S3C24XX_MISCCR);
misccr &= ~clear;
misccr ^= change;
__raw_writel(misccr, S3C24XX_MISCCR);
local_irq_restore(flags);
return misccr;
}
EXPORT_SYMBOL(s3c2410_modify_misccr);
#endif