Release 4.14 arch/mips/ar7/gpio.c
/*
* Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
* Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
* Copyright (C) 2009-2010 Florian Fainelli <florian@openwrt.org>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/init.h>
#include <linux/export.h>
#include <linux/gpio.h>
#include <asm/mach-ar7/ar7.h>
#define AR7_GPIO_MAX 32
#define TITAN_GPIO_MAX 51
struct ar7_gpio_chip {
void __iomem *regs;
struct gpio_chip chip;
};
static int ar7_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
{
struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
void __iomem *gpio_in = gpch->regs + AR7_GPIO_INPUT;
return !!(readl(gpio_in) & (1 << gpio));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 46 | 90.20% | 2 | 50.00% |
| Linus Walleij | 5 | 9.80% | 2 | 50.00% |
| Total | 51 | 100.00% | 4 | 100.00% |
static int titan_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
{
struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
void __iomem *gpio_in0 = gpch->regs + TITAN_GPIO_INPUT_0;
void __iomem *gpio_in1 = gpch->regs + TITAN_GPIO_INPUT_1;
return readl(gpio >> 5 ? gpio_in1 : gpio_in0) & (1 << (gpio & 0x1f));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 67 | 98.53% | 1 | 50.00% |
| Linus Walleij | 1 | 1.47% | 1 | 50.00% |
| Total | 68 | 100.00% | 2 | 100.00% |
static void ar7_gpio_set_value(struct gpio_chip *chip,
unsigned gpio, int value)
{
struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
void __iomem *gpio_out = gpch->regs + AR7_GPIO_OUTPUT;
unsigned tmp;
tmp = readl(gpio_out) & ~(1 << gpio);
if (value)
tmp |= 1 << gpio;
writel(tmp, gpio_out);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 71 | 98.61% | 2 | 66.67% |
| Linus Walleij | 1 | 1.39% | 1 | 33.33% |
| Total | 72 | 100.00% | 3 | 100.00% |
static void titan_gpio_set_value(struct gpio_chip *chip,
unsigned gpio, int value)
{
struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
void __iomem *gpio_out0 = gpch->regs + TITAN_GPIO_OUTPUT_0;
void __iomem *gpio_out1 = gpch->regs + TITAN_GPIO_OUTPUT_1;
unsigned tmp;
tmp = readl(gpio >> 5 ? gpio_out1 : gpio_out0) & ~(1 << (gpio & 0x1f));
if (value)
tmp |= 1 << (gpio & 0x1f);
writel(tmp, gpio >> 5 ? gpio_out1 : gpio_out0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 102 | 99.03% | 2 | 66.67% |
| Linus Walleij | 1 | 0.97% | 1 | 33.33% |
| Total | 103 | 100.00% | 3 | 100.00% |
static int ar7_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
void __iomem *gpio_dir = gpch->regs + AR7_GPIO_DIR;
writel(readl(gpio_dir) | (1 << gpio), gpio_dir);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 53 | 98.15% | 3 | 75.00% |
| Linus Walleij | 1 | 1.85% | 1 | 25.00% |
| Total | 54 | 100.00% | 4 | 100.00% |
static int titan_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
void __iomem *gpio_dir0 = gpch->regs + TITAN_GPIO_DIR_0;
void __iomem *gpio_dir1 = gpch->regs + TITAN_GPIO_DIR_1;
if (gpio >= TITAN_GPIO_MAX)
return -EINVAL;
writel(readl(gpio >> 5 ? gpio_dir1 : gpio_dir0) | (1 << (gpio & 0x1f)),
gpio >> 5 ? gpio_dir1 : gpio_dir0);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 90 | 98.90% | 3 | 75.00% |
| Linus Walleij | 1 | 1.10% | 1 | 25.00% |
| Total | 91 | 100.00% | 4 | 100.00% |
static int ar7_gpio_direction_output(struct gpio_chip *chip,
unsigned gpio, int value)
{
struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
void __iomem *gpio_dir = gpch->regs + AR7_GPIO_DIR;
ar7_gpio_set_value(chip, gpio, value);
writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 66 | 98.51% | 3 | 75.00% |
| Linus Walleij | 1 | 1.49% | 1 | 25.00% |
| Total | 67 | 100.00% | 4 | 100.00% |
static int titan_gpio_direction_output(struct gpio_chip *chip,
unsigned gpio, int value)
{
struct ar7_gpio_chip *gpch = gpiochip_get_data(chip);
void __iomem *gpio_dir0 = gpch->regs + TITAN_GPIO_DIR_0;
void __iomem *gpio_dir1 = gpch->regs + TITAN_GPIO_DIR_1;
if (gpio >= TITAN_GPIO_MAX)
return -EINVAL;
titan_gpio_set_value(chip, gpio, value);
writel(readl(gpio >> 5 ? gpio_dir1 : gpio_dir0) & ~(1 <<
(gpio & 0x1f)), gpio >> 5 ? gpio_dir1 : gpio_dir0);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 103 | 99.04% | 1 | 50.00% |
| Linus Walleij | 1 | 0.96% | 1 | 50.00% |
| Total | 104 | 100.00% | 2 | 100.00% |
static struct ar7_gpio_chip ar7_gpio_chip = {
.chip = {
.label = "ar7-gpio",
.direction_input = ar7_gpio_direction_input,
.direction_output = ar7_gpio_direction_output,
.set = ar7_gpio_set_value,
.get = ar7_gpio_get_value,
.base = 0,
.ngpio = AR7_GPIO_MAX,
}
};
static struct ar7_gpio_chip titan_gpio_chip = {
.chip = {
.label = "titan-gpio",
.direction_input = titan_gpio_direction_input,
.direction_output = titan_gpio_direction_output,
.set = titan_gpio_set_value,
.get = titan_gpio_get_value,
.base = 0,
.ngpio = TITAN_GPIO_MAX,
}
};
static inline int ar7_gpio_enable_ar7(unsigned gpio)
{
void __iomem *gpio_en = ar7_gpio_chip.regs + AR7_GPIO_ENABLE;
writel(readl(gpio_en) | (1 << gpio), gpio_en);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 40 | 100.00% | 1 | 100.00% |
| Total | 40 | 100.00% | 1 | 100.00% |
static inline int ar7_gpio_enable_titan(unsigned gpio)
{
void __iomem *gpio_en0 = titan_gpio_chip.regs + TITAN_GPIO_ENBL_0;
void __iomem *gpio_en1 = titan_gpio_chip.regs + TITAN_GPIO_ENBL_1;
writel(readl(gpio >> 5 ? gpio_en1 : gpio_en0) | (1 << (gpio & 0x1f)),
gpio >> 5 ? gpio_en1 : gpio_en0);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 67 | 100.00% | 1 | 100.00% |
| Total | 67 | 100.00% | 1 | 100.00% |
int ar7_gpio_enable(unsigned gpio)
{
return ar7_is_titan() ? ar7_gpio_enable_titan(gpio) :
ar7_gpio_enable_ar7(gpio);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(ar7_gpio_enable);
static inline int ar7_gpio_disable_ar7(unsigned gpio)
{
void __iomem *gpio_en = ar7_gpio_chip.regs + AR7_GPIO_ENABLE;
writel(readl(gpio_en) & ~(1 << gpio), gpio_en);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 41 | 100.00% | 1 | 100.00% |
| Total | 41 | 100.00% | 1 | 100.00% |
static inline int ar7_gpio_disable_titan(unsigned gpio)
{
void __iomem *gpio_en0 = titan_gpio_chip.regs + TITAN_GPIO_ENBL_0;
void __iomem *gpio_en1 = titan_gpio_chip.regs + TITAN_GPIO_ENBL_1;
writel(readl(gpio >> 5 ? gpio_en1 : gpio_en0) & ~(1 << (gpio & 0x1f)),
gpio >> 5 ? gpio_en1 : gpio_en0);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 68 | 100.00% | 1 | 100.00% |
| Total | 68 | 100.00% | 1 | 100.00% |
int ar7_gpio_disable(unsigned gpio)
{
return ar7_is_titan() ? ar7_gpio_disable_titan(gpio) :
ar7_gpio_disable_ar7(gpio);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL(ar7_gpio_disable);
struct titan_gpio_cfg {
u32 reg;
u32 shift;
u32 func;
};
static const struct titan_gpio_cfg titan_gpio_table[] = {
/* reg, start bit, mux value */
{4, 24, 1},
{4, 26, 1},
{4, 28, 1},
{4, 30, 1},
{5, 6, 1},
{5, 8, 1},
{5, 10, 1},
{5, 12, 1},
{7, 14, 3},
{7, 16, 3},
{7, 18, 3},
{7, 20, 3},
{7, 22, 3},
{7, 26, 3},
{7, 28, 3},
{7, 30, 3},
{8, 0, 3},
{8, 2, 3},
{8, 4, 3},
{8, 10, 3},
{8, 14, 3},
{8, 16, 3},
{8, 18, 3},
{8, 20, 3},
{9, 8, 3},
{9, 10, 3},
{9, 12, 3},
{9, 14, 3},
{9, 18, 3},
{9, 20, 3},
{9, 24, 3},
{9, 26, 3},
{9, 28, 3},
{9, 30, 3},
{10, 0, 3},
{10, 2, 3},
{10, 8, 3},
{10, 10, 3},
{10, 12, 3},
{10, 14, 3},
{13, 12, 3},
{13, 14, 3},
{13, 16, 3},
{13, 18, 3},
{13, 24, 3},
{13, 26, 3},
{13, 28, 3},
{13, 30, 3},
{14, 2, 3},
{14, 6, 3},
{14, 8, 3},
{14, 12, 3}
};
static int titan_gpio_pinsel(unsigned gpio)
{
struct titan_gpio_cfg gpio_cfg;
u32 mux_status, pin_sel_reg, tmp;
void __iomem *pin_sel = (void __iomem *)KSEG1ADDR(AR7_REGS_PINSEL);
if (gpio >= ARRAY_SIZE(titan_gpio_table))
return -EINVAL;
gpio_cfg = titan_gpio_table[gpio];
pin_sel_reg = gpio_cfg.reg - 1;
mux_status = (readl(pin_sel + pin_sel_reg) >> gpio_cfg.shift) & 0x3;
/* Check the mux status */
if (!((mux_status == 0) || (mux_status == gpio_cfg.func)))
return 0;
/* Set the pin sel value */
tmp = readl(pin_sel + pin_sel_reg);
tmp |= ((gpio_cfg.func & 0x3) << gpio_cfg.shift);
writel(tmp, pin_sel + pin_sel_reg);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 141 | 100.00% | 3 | 100.00% |
| Total | 141 | 100.00% | 3 | 100.00% |
/* Perform minimal Titan GPIO configuration */
static void titan_gpio_init(void)
{
unsigned i;
for (i = 44; i < 48; i++) {
titan_gpio_pinsel(i);
ar7_gpio_enable_titan(i);
titan_gpio_direction_input(&titan_gpio_chip.chip, i);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 46 | 100.00% | 2 | 100.00% |
| Total | 46 | 100.00% | 2 | 100.00% |
int __init ar7_gpio_init(void)
{
int ret;
struct ar7_gpio_chip *gpch;
unsigned size;
if (!ar7_is_titan()) {
gpch = &ar7_gpio_chip;
size = 0x10;
} else {
gpch = &titan_gpio_chip;
size = 0x1f;
}
gpch->regs = ioremap_nocache(AR7_REGS_GPIO, size);
if (!gpch->regs) {
printk(KERN_ERR "%s: failed to ioremap regs\n",
gpch->chip.label);
return -ENOMEM;
}
ret = gpiochip_add_data(&gpch->chip, gpch);
if (ret) {
printk(KERN_ERR "%s: failed to add gpiochip\n",
gpch->chip.label);
return ret;
}
printk(KERN_INFO "%s: registered %d GPIOs\n",
gpch->chip.label, gpch->chip.ngpio);
if (ar7_is_titan())
titan_gpio_init();
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 143 | 97.95% | 4 | 80.00% |
| Linus Walleij | 3 | 2.05% | 1 | 20.00% |
| Total | 146 | 100.00% | 5 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Florian Fainelli | 1755 | 98.43% | 5 | 55.56% |
| Linus Walleij | 15 | 0.84% | 2 | 22.22% |
| Alban Bedel | 9 | 0.50% | 1 | 11.11% |
| Paul Gortmaker | 4 | 0.22% | 1 | 11.11% |
| Total | 1783 | 100.00% | 9 | 100.00% |
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