a9c20f5789
1) Rework event handling and static registration mechanism. No target-
specific code in mc13783 driver. GPIO event driver interfaces more
cleanly.
2) Somewhat related - enable thread priority for bootloader which is
desireable here (ffs is used for GPIO event enabling anyway and that
goes along with priority).
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17593 a1c6a512-1295-4272-9138-f99709370657
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2008 by Michael Sevakis
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef GPIO_IMX31_H
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#define GPIO_IMX31_H
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/* Static registration mechanism for imx31 GPIO interrupts */
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#define USE_GPIO1_EVENTS (1 << 0)
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#define USE_GPIO2_EVENTS (1 << 1)
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#define USE_GPIO3_EVENTS (1 << 2)
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/* Module indexes defined by which GPIO modules are used */
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enum gpio_module_number
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{
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__GPIO_NUM_START = -1,
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#if (GPIO_EVENT_MASK & USE_GPIO1_EVENTS)
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GPIO1_NUM,
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#endif
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#if (GPIO_EVENT_MASK & USE_GPIO2_EVENTS)
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GPIO2_NUM,
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#endif
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#if (GPIO_EVENT_MASK & USE_GPIO3_EVENTS)
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GPIO3_NUM,
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#endif
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GPIO_NUM_GPIO,
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};
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/* Module corresponding to the event ID is identified by range */
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enum gpio_event_bases
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{
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#if (GPIO_EVENT_MASK & USE_GPIO1_EVENTS)
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GPIO1_EVENT_FIRST = 32*GPIO1_NUM,
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#endif
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#if (GPIO_EVENT_MASK & USE_GPIO2_EVENTS)
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GPIO2_EVENT_FIRST = 32*GPIO2_NUM,
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#endif
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#if (GPIO_EVENT_MASK & USE_GPIO3_EVENTS)
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GPIO3_EVENT_FIRST = 32*GPIO3_NUM,
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#endif
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};
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#include "gpio-target.h"
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/* Possible values for gpio interrupt line config */
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enum gpio_int_sense_enum
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{
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GPIO_SENSE_LOW_LEVEL = 0, /* High-level sensitive */
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GPIO_SENSE_HIGH_LEVEL, /* Low-level sensitive */
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GPIO_SENSE_RISING, /* Rising-edge sensitive */
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GPIO_SENSE_FALLING, /* Falling-edge sensitive */
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};
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#define GPIO_SENSE_CONFIG_MASK 0x3
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/* Register map for each module */
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struct gpio_map
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{
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volatile uint32_t dr; /* 00h */
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volatile uint32_t gdir; /* 04h */
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volatile uint32_t psr; /* 08h */
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union
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{
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struct
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{
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volatile uint32_t icr1; /* 0Ch */
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volatile uint32_t icr2; /* 10h */
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};
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volatile uint32_t icr[2]; /* 0Ch */
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};
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volatile uint32_t imr; /* 14h */
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volatile uint32_t isr; /* 18h */
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};
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/* Pending events will be called in array order which allows easy
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* pioritization */
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/* Describes a single event for a pin */
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struct gpio_event
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{
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uint32_t mask; /* mask: 1 << (0...31) */
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enum gpio_int_sense_enum sense; /* Type of sense */
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void (*callback)(void); /* Callback function */
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};
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/* Describes the events attached to a port */
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struct gpio_event_list
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{
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int ints_priority; /* Interrupt priority for this GPIO */
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unsigned count; /* Count of events for the module */
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const struct gpio_event *events; /* List of events */
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};
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void gpio_init(void);
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bool gpio_enable_event(enum gpio_event_ids id);
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void gpio_disable_event(enum gpio_event_ids id);
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#endif /* GPIO_IMX31_H */
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