Pi Zero: Add GPIO module header file.
This commit is contained in:
Gregory Nutt
parent
34a572b226
commit
0fc8978a90
@ -131,13 +131,26 @@
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#define BCM_IRQ_PCM (IPR2_IRQ_FIRST + 23) /* Bit 23: 55 PCM interrupt */
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#define BCM_IRQ_UART (IPR2_IRQ_FIRST + 24) /* Bit 24: 57 UART interrupt */
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#define IPR2_BIT_IRQMASK 0x01ff6800 /* Mask of defined interrupts */
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#define IPR2_IRQ_LAST BCM_IRQ_UART /* IRQ of last defined bit */
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#define IPR2_BIT_LAST (24) /* Last defined bit */
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#define IPR2_BIT_IRQMASK 0x01ff6800 /* Mask of defined interrupts */
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#define IPR2_IRQ_LAST BCM_IRQ_UART /* IRQ of last defined bit */
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#define IPR2_BIT_LAST (24) /* Last defined bit */
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/* Number of interrupts */
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#define NR_IRQS (IPR2_IRQ_LAST + 1)
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#define NR_INTERRUPTS (IPR2_IRQ_LAST + 1)
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/* Second level GPIO interrupts */
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#ifdef CONFIG_BCM2708_GPIO_IRQ
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# define BCM_IRQ_GPIO(n) (NR_INTERRUPTS + (n))
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# define NR_GPIOINTS (54)
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#else
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# define NR_GPIOINTS (0)
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#endif
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/* Number of supported IRQs */
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#define NR_IRQS (NR_INTERRUPTS + NR_GPIOINTS)
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#else
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# error Unrecognized BCM2708 chip
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@ -15,4 +15,10 @@ config ARCH_CHIP_BCM2835
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bool "Broadcom BCM2835"
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endchoice # BCM2708 Configuration Option
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menuconfig BCM2708_GPIO_IRQ
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bool "GPIO pin interrupts"
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---help---
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Enable support for interrupting GPIO pins
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endif # ARCH_CHIP_BCM2708
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309
arch/arm/src/bcm2708/bcm_gpio.h
Normal file
309
arch/arm/src/bcm2708/bcm_gpio.h
Normal file
@ -0,0 +1,309 @@
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/************************************************************************************
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* arch/arm/src/bcm2708/bcm_gpio.h
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_BCM2708_BCM_GPIO_H
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#define __ARCH_ARM_SRC_BCM2708_BCM_GPIO_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <assert.h>
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* Bit-encoded input to bcm_configgpio() ********************************************/
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/* 32-bit Encoding:
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*
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* .... .... .... .MMM PPII IIII V.BB BBBB
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*/
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/* Input/Output mode:
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*
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* .... .... .... .MMM .... .... .... ....
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*/
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#define GPIO_MODE_SHIFT (16) /* Bits 16-18: GPIO mode */
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#define GPIO_MODE_MASK (7 << GPIO_MODE_SHIFT)
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# define GPIO_INPUT (0 << GPIO_MODE_SHIFT) /* PIO Input */
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# define GPIO_OUTPUT (1 << GPIO_MODE_SHIFT) /* PIO Output */
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# define GPIO_ALT0 (4 << GPIO_MODE_SHIFT) /* Alternate function 0 */
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# define GPIO_ALT1 (5 << GPIO_MODE_SHIFT) /* Alternate function 1 */
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# define GPIO_ALT2 (6 << GPIO_MODE_SHIFT) /* Alternate function 2 */
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# define GPIO_ALT3 (7 << GPIO_MODE_SHIFT) /* Alternate function 3 */
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# define GPIO_ALT4 (3 << GPIO_MODE_SHIFT) /* Alternate function 4 */
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# define GPIO_ALT5 (2 << GPIO_MODE_SHIFT) /* Alternate function 5 */
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/* These bits set the pull up/down configuration of the pin:
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*
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* .... .... .... .... PP.. .... .... ....
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*/
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#define GPIO_PUD_SHIFT (14) /* Bits 14-16: GPIO configuration bits */
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#define GPIO_PUD_MASK (3 << GPIO_PUD_SHIFT)
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# define GPIO_PUD_NONE (0 << GPIO_PUD_SHIFT) /* Default, no pull */
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# define GPIO_PUD_PULLDOWN (1 << GPIO_PUD_SHIFT) /* Enable pull down */
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# define GPIO_PUD_PULLUP (2 << GPIO_PUD_SHIFT) /* Enable pull up */
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/* Interrupt detection modes:
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*
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* .... .... .... .... ..II IIII .... ....
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*/
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#define GPIO_INT_SHIFT (8) /* Bits 8-13: GPIO interrupt bits */
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#define GPIO_INT_MASK (0x3f << GPIO_INT_SHIFT)
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# define GPIO_INT_NONE (0 << GPIO_INT_SHIFT)
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# define GPIO_INT_RISING (1 << GPIO_INT_SHIFT)
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# define GPIO_INT_FALLING (2 << GPIO_INT_SHIFT)
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# define GPIO_INT_BOTHEDGES (GPIO_INT_RISING | GPIO_INT_FALLING)
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# define GPIO_INT_ASYNCHRISING (4 << GPIO_INT_SHIFT)
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# define GPIO_INT_ASYNCHFALLING (8 << GPIO_INT_SHIFT)
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# define GPIO_INT_ASYNCHBOTH (GPIO_INT_ASYNCHRISING | GPIO_INT_ASYNCHFALLING)
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# define GPIO_INT_HIGHLEVEL (16 << GPIO_INT_SHIFT)
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# define GPIO_INT_LOWLEVEL (32 << GPIO_INT_SHIFT)
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# define GPIO_INT_LEVELBOTH (GPIO_INT_HIGHLEVEL | GPIO_INT_LOWLEVEL)
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/* If the pin is an GPIO output, then this identifies the initial output value:
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*
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* .... .... .... .... .... .... V... ....
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*/
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#define GPIO_OUTPUT_SET (1 << 7) /* Bit 7: Initial value of output */
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#define GPIO_OUTPUT_CLEAR (0)
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/* This identifies the bit in the port:
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*
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* ..... .... ... .... .... ..BB BBBB
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*/
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#define GPIO_PIN_SHIFT (0) /* Bits 0-5: GPIO number: 0-31 */
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#define GPIO_PIN_MASK (63 << GPIO_PIN_SHIFT)
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#define GPIO_PIN0 (0 << GPIO_PIN_SHIFT)
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#define GPIO_PIN1 (1 << GPIO_PIN_SHIFT)
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#define GPIO_PIN2 (2 << GPIO_PIN_SHIFT)
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#define GPIO_PIN3 (3 << GPIO_PIN_SHIFT)
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#define GPIO_PIN4 (4 << GPIO_PIN_SHIFT)
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#define GPIO_PIN5 (5 << GPIO_PIN_SHIFT)
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#define GPIO_PIN6 (6 << GPIO_PIN_SHIFT)
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#define GPIO_PIN7 (7 << GPIO_PIN_SHIFT)
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#define GPIO_PIN8 (8 << GPIO_PIN_SHIFT)
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#define GPIO_PIN9 (9 << GPIO_PIN_SHIFT)
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#define GPIO_PIN10 (10 << GPIO_PIN_SHIFT)
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#define GPIO_PIN11 (11 << GPIO_PIN_SHIFT)
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#define GPIO_PIN12 (12 << GPIO_PIN_SHIFT)
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#define GPIO_PIN13 (13 << GPIO_PIN_SHIFT)
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#define GPIO_PIN14 (14 << GPIO_PIN_SHIFT)
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#define GPIO_PIN15 (15 << GPIO_PIN_SHIFT)
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#define GPIO_PIN16 (16 << GPIO_PIN_SHIFT)
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#define GPIO_PIN17 (17 << GPIO_PIN_SHIFT)
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#define GPIO_PIN18 (18 << GPIO_PIN_SHIFT)
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#define GPIO_PIN19 (19 << GPIO_PIN_SHIFT)
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#define GPIO_PIN20 (20 << GPIO_PIN_SHIFT)
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#define GPIO_PIN21 (21 << GPIO_PIN_SHIFT)
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#define GPIO_PIN22 (22 << GPIO_PIN_SHIFT)
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#define GPIO_PIN23 (23 << GPIO_PIN_SHIFT)
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#define GPIO_PIN24 (24 << GPIO_PIN_SHIFT)
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#define GPIO_PIN25 (25 << GPIO_PIN_SHIFT)
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#define GPIO_PIN26 (26 << GPIO_PIN_SHIFT)
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#define GPIO_PIN27 (27 << GPIO_PIN_SHIFT)
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#define GPIO_PIN28 (28 << GPIO_PIN_SHIFT)
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#define GPIO_PIN29 (29 << GPIO_PIN_SHIFT)
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#define GPIO_PIN30 (30 << GPIO_PIN_SHIFT)
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#define GPIO_PIN31 (31 << GPIO_PIN_SHIFT)
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#define GPIO_PIN32 (32 << GPIO_PIN_SHIFT)
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#define GPIO_PIN33 (33 << GPIO_PIN_SHIFT)
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#define GPIO_PIN34 (34 << GPIO_PIN_SHIFT)
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#define GPIO_PIN35 (35 << GPIO_PIN_SHIFT)
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#define GPIO_PIN36 (36 << GPIO_PIN_SHIFT)
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#define GPIO_PIN37 (37 << GPIO_PIN_SHIFT)
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#define GPIO_PIN38 (38 << GPIO_PIN_SHIFT)
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#define GPIO_PIN39 (39 << GPIO_PIN_SHIFT)
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#define GPIO_PIN40 (40 << GPIO_PIN_SHIFT)
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#define GPIO_PIN41 (41 << GPIO_PIN_SHIFT)
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#define GPIO_PIN42 (42 << GPIO_PIN_SHIFT)
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#define GPIO_PIN43 (43 << GPIO_PIN_SHIFT)
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#define GPIO_PIN44 (44 << GPIO_PIN_SHIFT)
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#define GPIO_PIN45 (45 << GPIO_PIN_SHIFT)
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#define GPIO_PIN46 (46 << GPIO_PIN_SHIFT)
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#define GPIO_PIN47 (47 << GPIO_PIN_SHIFT)
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#define GPIO_PIN48 (48 << GPIO_PIN_SHIFT)
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#define GPIO_PIN49 (49 << GPIO_PIN_SHIFT)
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#define GPIO_PIN50 (50 << GPIO_PIN_SHIFT)
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#define GPIO_PIN51 (51 << GPIO_PIN_SHIFT)
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#define GPIO_PIN52 (52 << GPIO_PIN_SHIFT)
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#define GPIO_PIN53 (53 << GPIO_PIN_SHIFT)
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/************************************************************************************
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* Public Types
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************************************************************************************/
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#ifndef __ASSEMBLY__
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/* Must be big enough to hold the 32-bit encoding */
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typedef uint32_t gpio_pinset_t;
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/************************************************************************************
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* Public Data
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************************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/************************************************************************************
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* Public Function Prototypes
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************************************************************************************/
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/************************************************************************************
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* Function: bcm_gpio_initialize
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*
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* Description:
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* Based on configuration within the .config file, it does:
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* - Remaps positions of alternative functions for GPIO.
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*
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* Typically called from bcm_start().
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*
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************************************************************************************/
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void bcm_gpio_initialize(void);
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/************************************************************************************
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* Name: bcm_gpio_irqinitialize
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*
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* Description:
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* Initialize logic to support a second level of interrupt decoding for GPIO pins.
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*
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************************************************************************************/
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#ifdef CONFIG_BCM2708_GPIO_IRQ
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void bcm_gpio_irqinitialize(void);
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#else
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# define bcm_gpio_irqinitialize()
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#endif
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/************************************************************************************
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* Name: bcm_configgpio
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*
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* Description:
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* Configure a GPIO pin based on bit-encoded description of the pin.
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*
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************************************************************************************/
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int bcm_configgpio(gpio_pinset_t cfgset);
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/************************************************************************************
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* Name: bcm_gpiowrite
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*
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* Description:
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* Write one or zero to the selected GPIO pin
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*
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************************************************************************************/
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void bcm_gpiowrite(gpio_pinset_t pinset, bool value);
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/************************************************************************************
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* Name: bcm_gpioread
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*
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* Description:
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* Read one or zero from the selected GPIO pin
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*
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************************************************************************************/
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bool bcm_gpioread(gpio_pinset_t pinset);
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/************************************************************************************
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* Name: bcm_gpioirq
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*
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* Description:
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* Configure an interrupt for the specified GPIO pin.
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*
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************************************************************************************/
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#ifdef CONFIG_BCM2708_GPIO_IRQ
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void bcm_gpioirq(gpio_pinset_t pinset);
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#else
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# define bcm_gpioirq(pinset)
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#endif
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/************************************************************************************
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* Name: bcm_gpioirqenable
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*
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* Description:
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* Enable the interrupt for specified GPIO IRQ
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*
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************************************************************************************/
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#ifdef CONFIG_BCM2708_GPIO_IRQ
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void bcm_gpioirqenable(int irq);
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#else
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# define bcm_gpioirqenable(irq)
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#endif
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/************************************************************************************
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* Name: bcm_gpioirqdisable
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*
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* Description:
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* Disable the interrupt for specified GPIO IRQ
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*
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************************************************************************************/
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#ifdef CONFIG_BCM2708_GPIO_IRQ
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void bcm_gpioirqdisable(int irq);
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#else
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# define bcm_gpioirqdisable(irq)
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#endif
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_BCM2708_BCM_GPIO_H */
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@ -52,6 +52,7 @@
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#include "up_internal.h"
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#include "group/group.h"
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#include "bcm_gpio.h"
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#include "chip/bcm2708_irq.h"
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/****************************************************************************
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@ -92,6 +93,12 @@ void up_irqinitialize(void)
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CURRENT_REGS = NULL;
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#ifdef CONFIG_BCM2708_GPIO_IRQ
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/* Initialize GPIO interrrupts */
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bcm_gpio_irqinitialize();
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#endif
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#ifndef CONFIG_SUPPRESS_INTERRUPTS
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/* And finally, enable interrupts */
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