75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
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/*
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* include/linux/stm/pio.h
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*
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* Copyright (c) 2004 STMicroelectronics Limited
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* Author: Stuart Menefy <stuart.menefy@st.com>
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*
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* ST40 General Purpose IO pins support.
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*
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* This layer enables other device drivers to configure PIO
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* pins, get and set their values, and register an interrupt
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* routine for when input pins change state.
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*/
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#ifndef __LINUX_STM_PIO_H
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#define __LINUX_STM_PIO_H
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#include <linux/kernel.h>
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/* Pin configuration constants */
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/* Note that behaviour for modes 0, 6 and 7 differ between the ST40STB1
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* datasheet (implementation restrictions appendix), and the ST40
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* architectural defintions.
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*/
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#define STPIO_NONPIO 0 /* Non-PIO function (ST40 defn) */
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#define STPIO_BIDIR_Z1 0 /* Input weak pull-up (arch defn) */
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#define STPIO_BIDIR 1 /* Bidirectonal open-drain */
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#define STPIO_OUT 2 /* Output push-pull */
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#define STPIO_IN 4 /* Input Hi-Z */
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#define STPIO_ALT_OUT 6 /* Alt output push-pull (arch defn) */
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#define STPIO_ALT_BIDIR 7 /* Alt bidir open drain (arch defn) */
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struct stpio_pin;
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/* Request and release exclusive use of a PIO pin */
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#define stpio_request_pin(portno, pinno, name, direction) \
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__stpio_request_pin(portno, pinno, name, direction, 0, 0)
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#define stpio_request_set_pin(portno, pinno, name, direction, value) \
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__stpio_request_pin(portno, pinno, name, direction, 1, value)
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struct stpio_pin *__stpio_request_pin(unsigned int portno,
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unsigned int pinno, const char *name, int direction,
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int __set_value, unsigned int value);
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void stpio_free_pin(struct stpio_pin *pin);
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/* Change the mode of an existing pin */
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void stpio_configure_pin(struct stpio_pin *pin, int direction);
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/* Get, set value */
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void stpio_set_pin(struct stpio_pin* pin, unsigned int value);
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unsigned int stpio_get_pin(struct stpio_pin* pin);
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/* Interrupt on external value change */
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int stpio_flagged_request_irq(struct stpio_pin *pin, int comp,
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void (*handler)(struct stpio_pin *pin, void *dev),
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void *dev, unsigned long irqflags);
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static inline int __deprecated stpio_request_irq(struct stpio_pin *pin,
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int comp,
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void (*handler)(struct stpio_pin *pin, void *dev),
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void *dev)
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{
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return stpio_flagged_request_irq(pin, comp, handler, dev, 0);
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}
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void stpio_free_irq(struct stpio_pin* pin);
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void stpio_enable_irq(struct stpio_pin* pin, int mode);
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void stpio_disable_irq(struct stpio_pin* pin);
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void stpio_disable_irq_nosync(struct stpio_pin* pin);
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void stpio_set_irq_type(struct stpio_pin* pin, int triggertype);
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#ifdef CONFIG_PM
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int stpio_set_wakeup(struct stpio_pin *pin, int enabled);
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#else
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#define stpio_set_wakeup(pin, enabled) do {} while(0)
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#endif
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#endif /* __LINUX_STM_PIO_H */
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