1 files changed, 133 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/include/mach/gpio-pxa.h b/arch/arm/mach-pxa/include/mach/gpio-pxa.h
new file mode 100644
index 000000000000..41b4c93a96c2
--- /dev/null
+++ b/arch/arm/mach-pxa/include/mach/gpio-pxa.h
@@ -0,0 +1,133 @@
+/*
+ * Written by Philipp Zabel <philipp.zabel@gmail.com>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#ifndef __MACH_PXA_GPIO_PXA_H
+#define __MACH_PXA_GPIO_PXA_H
+
+#include <mach/irqs.h>
+#include <mach/hardware.h>
+
+#define GPIO_REGS_VIRT	io_p2v(0x40E00000)
+
+#define BANK_OFF(n)	(((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))
+#define GPIO_REG(x)	(*(volatile u32 *)(GPIO_REGS_VIRT + (x)))
+
+/* GPIO Pin Level Registers */
+#define GPLR0		GPIO_REG(BANK_OFF(0) + 0x00)
+#define GPLR1		GPIO_REG(BANK_OFF(1) + 0x00)
+#define GPLR2		GPIO_REG(BANK_OFF(2) + 0x00)
+#define GPLR3		GPIO_REG(BANK_OFF(3) + 0x00)
+
+/* GPIO Pin Direction Registers */
+#define GPDR0		GPIO_REG(BANK_OFF(0) + 0x0c)
+#define GPDR1		GPIO_REG(BANK_OFF(1) + 0x0c)
+#define GPDR2		GPIO_REG(BANK_OFF(2) + 0x0c)
+#define GPDR3		GPIO_REG(BANK_OFF(3) + 0x0c)
+
+/* GPIO Pin Output Set Registers */
+#define GPSR0		GPIO_REG(BANK_OFF(0) + 0x18)
+#define GPSR1		GPIO_REG(BANK_OFF(1) + 0x18)
+#define GPSR2		GPIO_REG(BANK_OFF(2) + 0x18)
+#define GPSR3		GPIO_REG(BANK_OFF(3) + 0x18)
+
+/* GPIO Pin Output Clear Registers */
+#define GPCR0		GPIO_REG(BANK_OFF(0) + 0x24)
+#define GPCR1		GPIO_REG(BANK_OFF(1) + 0x24)
+#define GPCR2		GPIO_REG(BANK_OFF(2) + 0x24)
+#define GPCR3		GPIO_REG(BANK_OFF(3) + 0x24)
+
+/* GPIO Rising Edge Detect Registers */
+#define GRER0		GPIO_REG(BANK_OFF(0) + 0x30)
+#define GRER1		GPIO_REG(BANK_OFF(1) + 0x30)
+#define GRER2		GPIO_REG(BANK_OFF(2) + 0x30)
+#define GRER3		GPIO_REG(BANK_OFF(3) + 0x30)
+
+/* GPIO Falling Edge Detect Registers */
+#define GFER0		GPIO_REG(BANK_OFF(0) + 0x3c)
+#define GFER1		GPIO_REG(BANK_OFF(1) + 0x3c)
+#define GFER2		GPIO_REG(BANK_OFF(2) + 0x3c)
+#define GFER3		GPIO_REG(BANK_OFF(3) + 0x3c)
+
+/* GPIO Edge Detect Status Registers */
+#define GEDR0		GPIO_REG(BANK_OFF(0) + 0x48)
+#define GEDR1		GPIO_REG(BANK_OFF(1) + 0x48)
+#define GEDR2		GPIO_REG(BANK_OFF(2) + 0x48)
+#define GEDR3		GPIO_REG(BANK_OFF(3) + 0x48)
+
+/* GPIO Alternate Function Select Registers */
+#define GAFR0_L		GPIO_REG(0x0054)
+#define GAFR0_U		GPIO_REG(0x0058)
+#define GAFR1_L		GPIO_REG(0x005C)
+#define GAFR1_U		GPIO_REG(0x0060)
+#define GAFR2_L		GPIO_REG(0x0064)
+#define GAFR2_U		GPIO_REG(0x0068)
+#define GAFR3_L		GPIO_REG(0x006C)
+#define GAFR3_U		GPIO_REG(0x0070)
+
+/* More handy macros.  The argument is a literal GPIO number. */
+
+#define GPIO_bit(x)	(1 << ((x) & 0x1f))
+
+#define GPLR(x)		GPIO_REG(BANK_OFF((x) >> 5) + 0x00)
+#define GPDR(x)		GPIO_REG(BANK_OFF((x) >> 5) + 0x0c)
+#define GPSR(x)		GPIO_REG(BANK_OFF((x) >> 5) + 0x18)
+#define GPCR(x)		GPIO_REG(BANK_OFF((x) >> 5) + 0x24)
+#define GRER(x)		GPIO_REG(BANK_OFF((x) >> 5) + 0x30)
+#define GFER(x)		GPIO_REG(BANK_OFF((x) >> 5) + 0x3c)
+#define GEDR(x)		GPIO_REG(BANK_OFF((x) >> 5) + 0x48)
+#define GAFR(x)		GPIO_REG(0x54 + (((x) & 0x70) >> 2))
+
+
+#define NR_BUILTIN_GPIO		PXA_GPIO_IRQ_NUM
+
+#define gpio_to_bank(gpio)	((gpio) >> 5)
+
+#ifdef CONFIG_CPU_PXA26x
+/* GPIO86/87/88/89 on PXA26x have their direction bits in GPDR2 inverted,
+ * as well as their Alternate Function value being '1' for GPIO in GAFRx.
+ */
+static inline int __gpio_is_inverted(unsigned gpio)
+{
+	return cpu_is_pxa25x() && gpio > 85;
+}
+#else
+static inline int __gpio_is_inverted(unsigned gpio) { return 0; }
+#endif
+
+/*
+ * On PXA25x and PXA27x, GAFRx and GPDRx together decide the alternate
+ * function of a GPIO, and GPDRx cannot be altered once configured. It
+ * is attributed as "occupied" here (I know this terminology isn't
+ * accurate, you are welcome to propose a better one :-)
+ */
+static inline int __gpio_is_occupied(unsigned gpio)
+{
+	if (cpu_is_pxa27x() || cpu_is_pxa25x()) {
+		int af = (GAFR(gpio) >> ((gpio & 0xf) * 2)) & 0x3;
+		int dir = GPDR(gpio) & GPIO_bit(gpio);
+
+		if (__gpio_is_inverted(gpio))
+			return af != 1 || dir == 0;
+		else
+			return af != 0 || dir != 0;
+	} else
+		return GPDR(gpio) & GPIO_bit(gpio);
+}
+
+#include <plat/gpio-pxa.h>
+#endif /* __MACH_PXA_GPIO_PXA_H */