645680d62b
Past development has proved that one can mistakely use the same pin for two uses without noticing. Since this causes extremely hard to find bugs, the infrastructure will allow to register pin uses and panic when a conflict is detected. The pinctrl debug now shows the pin uses when its support is compiled in. Change-Id: Idb2d5235ce09207d77aa474d6f158e72b933761a
116 lines
3.5 KiB
C
116 lines
3.5 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) 2011 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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#include "system.h"
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#include "system-target.h"
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#include "cpu.h"
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#include "string.h"
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#include "pinctrl-imx233.h"
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#ifdef IMX233_PINCTRL_DEBUG
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// 4 banks of 32 pins
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static const char *pin_use[4][32];
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void imx233_pinctrl_acquire_pin(unsigned bank, unsigned pin, const char *name)
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{
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if(pin_use[bank][pin] != NULL && pin_use[bank][pin] != name)
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panicf("acquire B%dP%02d for %s, was %s!", bank, pin, name, pin_use[bank][pin]);
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pin_use[bank][pin] = name;
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}
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void imx233_pinctrl_acquire_pin_mask(unsigned bank, uint32_t mask, const char *name)
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{
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for(unsigned pin = 0; pin < 32; pin++)
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if(mask & (1 << pin))
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imx233_pinctrl_acquire_pin(bank, pin, name);
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}
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void imx233_pinctrl_release_pin(unsigned bank, unsigned pin, const char *name)
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{
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if(pin_use[bank][pin] != NULL && pin_use[bank][pin] != name)
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panicf("release B%dP%02d for %s: was %s!", bank, pin, name, pin_use[bank][pin]);
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pin_use[bank][pin] = NULL;
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}
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void imx233_pinctrl_release_pin_mask(unsigned bank, uint32_t mask, const char *name)
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{
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for(unsigned pin = 0; pin < 32; pin++)
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if(mask & (1 << pin))
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imx233_pinctrl_release_pin(bank, pin, name);
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}
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const char *imx233_pinctrl_get_pin_use(unsigned bank, unsigned pin)
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{
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return pin_use[bank][pin];
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}
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#endif
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static pin_irq_cb_t pin_cb[3][32]; /* 3 banks, 32 pins/bank */
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static void INT_GPIO(int bank)
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{
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uint32_t fire = HW_PINCTRL_IRQSTAT(bank) & HW_PINCTRL_IRQEN(bank);
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for(int pin = 0; pin < 32; pin++)
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if(fire & (1 << pin))
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{
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pin_irq_cb_t cb = pin_cb[bank][pin];
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imx233_setup_pin_irq(bank, pin, false, false, false, NULL);
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if(cb)
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cb(bank, pin);
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}
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}
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void INT_GPIO0(void)
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{
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INT_GPIO(0);
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}
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void INT_GPIO1(void)
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{
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INT_GPIO(1);
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}
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void INT_GPIO2(void)
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{
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INT_GPIO(2);
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}
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void imx233_setup_pin_irq(int bank, int pin, bool enable_int,
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bool level, bool polarity, pin_irq_cb_t cb)
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{
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__REG_CLR(HW_PINCTRL_PIN2IRQ(bank)) = 1 << pin;
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__REG_CLR(HW_PINCTRL_IRQEN(bank)) = 1 << pin;
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__REG_CLR(HW_PINCTRL_IRQSTAT(bank))= 1 << pin;
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pin_cb[bank][pin] = cb;
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if(enable_int)
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{
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if(level)
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__REG_SET(HW_PINCTRL_IRQLEVEL(bank)) = 1 << pin;
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else
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__REG_CLR(HW_PINCTRL_IRQLEVEL(bank)) = 1 << pin;
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if(polarity)
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__REG_SET(HW_PINCTRL_IRQPOL(bank)) = 1 << pin;
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else
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__REG_CLR(HW_PINCTRL_IRQPOL(bank)) = 1 << pin;
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__REG_SET(HW_PINCTRL_PIN2IRQ(bank)) = 1 << pin;
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__REG_SET(HW_PINCTRL_IRQEN(bank)) = 1 << pin;
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imx233_enable_interrupt(INT_SRC_GPIO(bank), true);
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}
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}
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