MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.
Signed-off-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/bcm63xx/gpio.c b/arch/mips/bcm63xx/gpio.c
new file mode 100644
index 0000000..87ca390
--- /dev/null
+++ b/arch/mips/bcm63xx/gpio.c
@@ -0,0 +1,134 @@
+/*
+ * 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 Florian Fainelli <florian@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_gpio.h>
+#include <bcm63xx_io.h>
+#include <bcm63xx_regs.h>
+
+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_DATA_LO_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_DATA_LO_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 == 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, 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, 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_chip.ngpio = bcm63xx_gpio_count();
+ pr_info("registering %d GPIOs\n", bcm63xx_gpio_chip.ngpio);
+
+ return gpiochip_add(&bcm63xx_gpio_chip);
+}
+
+arch_initcall(bcm63xx_gpio_init);