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Diffstat (limited to 'include/asm-avr32/arch-common/portmux-pio.h')
-rw-r--r--include/asm-avr32/arch-common/portmux-pio.h138
1 files changed, 138 insertions, 0 deletions
diff --git a/include/asm-avr32/arch-common/portmux-pio.h b/include/asm-avr32/arch-common/portmux-pio.h
new file mode 100644
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--- /dev/null
+++ b/include/asm-avr32/arch-common/portmux-pio.h
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2006, 2008 Atmel Corporation
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 __AVR32_PORTMUX_PIO_H__
+#define __AVR32_PORTMUX_PIO_H__
+
+#include <asm/io.h>
+
+/* PIO register offsets */
+#define PIO_PER 0x0000
+#define PIO_PDR 0x0004
+#define PIO_PSR 0x0008
+#define PIO_OER 0x0010
+#define PIO_ODR 0x0014
+#define PIO_OSR 0x0018
+#define PIO_IFER 0x0020
+#define PIO_IFDR 0x0024
+#define PIO_ISFR 0x0028
+#define PIO_SODR 0x0030
+#define PIO_CODR 0x0034
+#define PIO_ODSR 0x0038
+#define PIO_PDSR 0x003c
+#define PIO_IER 0x0040
+#define PIO_IDR 0x0044
+#define PIO_IMR 0x0048
+#define PIO_ISR 0x004c
+#define PIO_MDER 0x0050
+#define PIO_MDDR 0x0054
+#define PIO_MDSR 0x0058
+#define PIO_PUDR 0x0060
+#define PIO_PUER 0x0064
+#define PIO_PUSR 0x0068
+#define PIO_ASR 0x0070
+#define PIO_BSR 0x0074
+#define PIO_ABSR 0x0078
+#define PIO_OWER 0x00a0
+#define PIO_OWDR 0x00a4
+#define PIO_OWSR 0x00a8
+
+/* Hardware register access */
+#define pio_readl(base, reg) \
+ __raw_readl((void *)base + PIO_##reg)
+#define pio_writel(base, reg, value) \
+ __raw_writel((value), (void *)base + PIO_##reg)
+
+/* Portmux API starts here. See doc/README.AVR32-port-muxing */
+
+enum portmux_function {
+ PORTMUX_FUNC_A,
+ PORTMUX_FUNC_B,
+};
+
+/* Pull-down, buskeeper and drive strength are not supported */
+#define PORTMUX_DIR_INPUT (0 << 0)
+#define PORTMUX_DIR_OUTPUT (1 << 0)
+#define PORTMUX_INIT_LOW (0 << 1)
+#define PORTMUX_INIT_HIGH (1 << 1)
+#define PORTMUX_PULL_UP (1 << 2)
+#define PORTMUX_PULL_DOWN (0)
+#define PORTMUX_BUSKEEPER PORTMUX_PULL_UP
+#define PORTMUX_DRIVE_MIN (0)
+#define PORTMUX_DRIVE_LOW (0)
+#define PORTMUX_DRIVE_HIGH (0)
+#define PORTMUX_DRIVE_MAX (0)
+#define PORTMUX_OPEN_DRAIN (1 << 3)
+
+void portmux_select_peripheral(void *port, unsigned long pin_mask,
+ enum portmux_function func, unsigned long flags);
+void portmux_select_gpio(void *port, unsigned long pin_mask,
+ unsigned long flags);
+
+/* Internal helper functions */
+
+static inline void __pio_set_output_value(void *port, unsigned int pin,
+ int value)
+{
+ /*
+ * value will usually be constant, but it's pretty cheap
+ * either way.
+ */
+ if (value)
+ pio_writel(port, SODR, 1 << pin);
+ else
+ pio_writel(port, CODR, 1 << pin);
+}
+
+static inline int __pio_get_input_value(void *port, unsigned int pin)
+{
+ return (pio_readl(port, PDSR) >> pin) & 1;
+}
+
+void pio_set_output_value(unsigned int pin, int value);
+int pio_get_input_value(unsigned int pin);
+
+/* GPIO API starts here */
+
+/*
+ * GCC doesn't realize that the constant case is extremely trivial,
+ * so we need to help it make the right decision by using
+ * always_inline.
+ */
+__attribute__((always_inline))
+static inline void gpio_set_value(unsigned int pin, int value)
+{
+ if (__builtin_constant_p(pin))
+ __pio_set_output_value(pio_pin_to_port(pin), pin & 0x1f, value);
+ else
+ pio_set_output_value(pin, value);
+}
+
+__attribute__((always_inline))
+static inline int gpio_get_value(unsigned int pin)
+{
+ if (__builtin_constant_p(pin))
+ return __pio_get_input_value(pio_pin_to_port(pin), pin & 0x1f);
+ else
+ return pio_get_input_value(pin);
+}
+
+#endif /* __AVR32_PORTMUX_PIO_H__ */