Orange Pi5 kernel

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
 * Copyright (C) 2008-2011 Florian Fainelli <florian@openwrt.org>
 */
 
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/gpio/driver.h>
 
#include <bcm63xx_cpu.h>
#include <bcm63xx_gpio.h>
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>
 
static u32 gpio_out_low_reg;
 
static void bcm63xx_gpio_out_low_reg_init(void)
{
<------>switch (bcm63xx_get_cpu_id()) {
<------>case BCM6345_CPU_ID:
<------><------>gpio_out_low_reg = GPIO_DATA_LO_REG_6345;
<------><------>break;
<------>default:
<------><------>gpio_out_low_reg = GPIO_DATA_LO_REG;
<------><------>break;
<------>}
}
 
static DEFINE_SPINLOCK(bcm63xx_gpio_lock);
static u32 gpio_out_low, gpio_out_high;
 
static void bcm63xx_gpio_set(struct gpio_chip *chip,
<------><------><------>     unsigned gpio, int val)
{
<------>u32 reg;
<------>u32 mask;
<------>u32 *v;
<------>unsigned long flags;
 
<------>if (gpio >= chip->ngpio)
<------><------>BUG();
 
<------>if (gpio < 32) {
<------><------>reg = gpio_out_low_reg;
<------><------>mask = 1 << gpio;
<------><------>v = &gpio_out_low;
<------>} else {
<------><------>reg = GPIO_DATA_HI_REG;
<------><------>mask = 1 << (gpio - 32);
<------><------>v = &gpio_out_high;
<------>}
 
<------>spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
<------>if (val)
<------><------>*v |= mask;
<------>else
<------><------>*v &= ~mask;
<------>bcm_gpio_writel(*v, reg);
<------>spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
}
 
static int bcm63xx_gpio_get(struct gpio_chip *chip, unsigned gpio)
{
<------>u32 reg;
<------>u32 mask;
 
<------>if (gpio >= chip->ngpio)
<------><------>BUG();
 
<------>if (gpio < 32) {
<------><------>reg = gpio_out_low_reg;
<------><------>mask = 1 << gpio;
<------>} else {
<------><------>reg = GPIO_DATA_HI_REG;
<------><------>mask = 1 << (gpio - 32);
<------>}
 
<------>return !!(bcm_gpio_readl(reg) & mask);
}
 
static int bcm63xx_gpio_set_direction(struct gpio_chip *chip,
<------><------><------><------>      unsigned gpio, int dir)
{
<------>u32 reg;
<------>u32 mask;
<------>u32 tmp;
<------>unsigned long flags;
 
<------>if (gpio >= chip->ngpio)
<------><------>BUG();
 
<------>if (gpio < 32) {
<------><------>reg = GPIO_CTL_LO_REG;
<------><------>mask = 1 << gpio;
<------>} else {
<------><------>reg = GPIO_CTL_HI_REG;
<------><------>mask = 1 << (gpio - 32);
<------>}
 
<------>spin_lock_irqsave(&bcm63xx_gpio_lock, flags);
<------>tmp = bcm_gpio_readl(reg);
<------>if (dir == BCM63XX_GPIO_DIR_IN)
<------><------>tmp &= ~mask;
<------>else
<------><------>tmp |= mask;
<------>bcm_gpio_writel(tmp, reg);
<------>spin_unlock_irqrestore(&bcm63xx_gpio_lock, flags);
 
<------>return 0;
}
 
static int bcm63xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
<------>return bcm63xx_gpio_set_direction(chip, gpio, BCM63XX_GPIO_DIR_IN);
}
 
static int bcm63xx_gpio_direction_output(struct gpio_chip *chip,
<------><------><------><------><------> unsigned gpio, int value)
{
<------>bcm63xx_gpio_set(chip, gpio, value);
<------>return bcm63xx_gpio_set_direction(chip, gpio, BCM63XX_GPIO_DIR_OUT);
}
 
 
static struct gpio_chip bcm63xx_gpio_chip = {
<------>.label			= "bcm63xx-gpio",
<------>.direction_input	= bcm63xx_gpio_direction_input,
<------>.direction_output	= bcm63xx_gpio_direction_output,
<------>.get			= bcm63xx_gpio_get,
<------>.set			= bcm63xx_gpio_set,
<------>.base			= 0,
};
 
int __init bcm63xx_gpio_init(void)
{
<------>bcm63xx_gpio_out_low_reg_init();
 
<------>gpio_out_low = bcm_gpio_readl(gpio_out_low_reg);
<------>if (!BCMCPU_IS_6345())
<------><------>gpio_out_high = bcm_gpio_readl(GPIO_DATA_HI_REG);
<------>bcm63xx_gpio_chip.ngpio = bcm63xx_gpio_count();
<------>pr_info("registering %d GPIOs\n", bcm63xx_gpio_chip.ngpio);
 
<------>return gpiochip_add_data(&bcm63xx_gpio_chip, NULL);
}