1 files changed, 123 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-au1x00/gpio-au1300.h b/arch/mips/include/asm/mach-au1x00/gpio-au1300.h
new file mode 100644
index 000000000..d16add7ba
--- /dev/null
+++ b/arch/mips/include/asm/mach-au1x00/gpio-au1300.h
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * gpio-au1300.h -- GPIO control for Au1300 GPIC and compatibles.
+ *
+ * Copyright (c) 2009-2011 Manuel Lauss <manuel.lauss@googlemail.com>
+ */
+
+#ifndef _GPIO_AU1300_H_
+#define _GPIO_AU1300_H_
+
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/mach-au1x00/au1000.h>
+
+struct gpio;
+struct gpio_chip;
+
+/* with the current GPIC design, up to 128 GPIOs are possible.
+ * The only implementation so far is in the Au1300, which has 75 externally
+ * available GPIOs.
+ */
+#define AU1300_GPIO_BASE	0
+#define AU1300_GPIO_NUM		75
+#define AU1300_GPIO_MAX		(AU1300_GPIO_BASE + AU1300_GPIO_NUM - 1)
+
+#define AU1300_GPIC_ADDR	\
+	(void __iomem *)KSEG1ADDR(AU1300_GPIC_PHYS_ADDR)
+
+static inline int au1300_gpio_get_value(unsigned int gpio)
+{
+	void __iomem *roff = AU1300_GPIC_ADDR;
+	int bit;
+
+	gpio -= AU1300_GPIO_BASE;
+	roff += GPIC_GPIO_BANKOFF(gpio);
+	bit = GPIC_GPIO_TO_BIT(gpio);
+	return __raw_readl(roff + AU1300_GPIC_PINVAL) & bit;
+}
+
+static inline int au1300_gpio_direction_input(unsigned int gpio)
+{
+	void __iomem *roff = AU1300_GPIC_ADDR;
+	unsigned long bit;
+
+	gpio -= AU1300_GPIO_BASE;
+
+	roff += GPIC_GPIO_BANKOFF(gpio);
+	bit = GPIC_GPIO_TO_BIT(gpio);
+	__raw_writel(bit, roff + AU1300_GPIC_DEVCLR);
+	wmb();
+
+	return 0;
+}
+
+static inline int au1300_gpio_set_value(unsigned int gpio, int v)
+{
+	void __iomem *roff = AU1300_GPIC_ADDR;
+	unsigned long bit;
+
+	gpio -= AU1300_GPIO_BASE;
+
+	roff += GPIC_GPIO_BANKOFF(gpio);
+	bit = GPIC_GPIO_TO_BIT(gpio);
+	__raw_writel(bit, roff + (v ? AU1300_GPIC_PINVAL
+				    : AU1300_GPIC_PINVALCLR));
+	wmb();
+
+	return 0;
+}
+
+static inline int au1300_gpio_direction_output(unsigned int gpio, int v)
+{
+	/* hw switches to output automatically */
+	return au1300_gpio_set_value(gpio, v);
+}
+
+static inline int au1300_gpio_to_irq(unsigned int gpio)
+{
+	return AU1300_FIRST_INT + (gpio - AU1300_GPIO_BASE);
+}
+
+static inline int au1300_irq_to_gpio(unsigned int irq)
+{
+	return (irq - AU1300_FIRST_INT) + AU1300_GPIO_BASE;
+}
+
+static inline int au1300_gpio_is_valid(unsigned int gpio)
+{
+	int ret;
+
+	switch (alchemy_get_cputype()) {
+	case ALCHEMY_CPU_AU1300:
+		ret = ((gpio >= AU1300_GPIO_BASE) && (gpio <= AU1300_GPIO_MAX));
+		break;
+	default:
+		ret = 0;
+	}
+	return ret;
+}
+
+static inline int au1300_gpio_cansleep(unsigned int gpio)
+{
+	return 0;
+}
+
+/* hardware remembers gpio 0-63 levels on powerup */
+static inline int au1300_gpio_getinitlvl(unsigned int gpio)
+{
+	void __iomem *roff = AU1300_GPIC_ADDR;
+	unsigned long v;
+
+	if (unlikely(gpio > 63))
+		return 0;
+	else if (gpio > 31) {
+		gpio -= 32;
+		roff += 4;
+	}
+
+	v = __raw_readl(roff + AU1300_GPIC_RSTVAL);
+	return (v >> gpio) & 1;
+}
+
+#endif /* _GPIO_AU1300_H_ */