From 85c32dbd12108fc570afdec450b7d73684f37a2d Mon Sep 17 00:00:00 2001
From: Amaury Pouly <pamaury@rockbox.org>
Date: Fri, 22 Jul 2011 15:45:50 +0000
Subject: imx233/fuze+: add pin irq support

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30195 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/imx233/pinctrl-imx233.c | 77 +++++++++++++++++++++++++++++
 firmware/target/arm/imx233/pinctrl-imx233.h |  7 +++
 2 files changed, 84 insertions(+)
 create mode 100644 firmware/target/arm/imx233/pinctrl-imx233.c

(limited to 'firmware/target/arm/imx233')

diff --git a/firmware/target/arm/imx233/pinctrl-imx233.c b/firmware/target/arm/imx233/pinctrl-imx233.c
new file mode 100644
index 0000000000..7997292fcb
--- /dev/null
+++ b/firmware/target/arm/imx233/pinctrl-imx233.c
@@ -0,0 +1,77 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2011 by Amaury Pouly
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "system.h"
+#include "system-target.h"
+#include "cpu.h"
+#include "pinctrl-imx233.h"
+
+static pin_irq_cb_t pin_cb[3][32]; /* 3 banks, 32 pins/bank */
+
+static void INT_GPIO(int bank)
+{
+    uint32_t fire = HW_PINCTRL_IRQSTAT(bank) & HW_PINCTRL_IRQEN(bank);
+    for(int pin = 0; pin < 32; pin++)
+        if(fire & (1 << pin))
+        {
+            pin_irq_cb_t cb = pin_cb[bank][pin];
+            imx233_setup_pin_irq(bank, pin, false, false, false, NULL);
+            if(cb)
+                cb(bank, pin);
+        }
+}
+
+void INT_GPIO0(void)
+{
+    INT_GPIO(0);
+}
+
+void INT_GPIO1(void)
+{
+    INT_GPIO(1);
+}
+
+void INT_GPIO2(void)
+{
+    INT_GPIO(2);
+}
+
+void imx233_setup_pin_irq(int bank, int pin, bool enable_int,
+    bool level, bool polarity, pin_irq_cb_t cb)
+{
+    __REG_CLR(HW_PINCTRL_PIN2IRQ(bank)) = 1 << pin;
+    __REG_CLR(HW_PINCTRL_IRQEN(bank)) = 1 << pin;
+    __REG_CLR(HW_PINCTRL_IRQSTAT(bank))= 1 << pin;
+    pin_cb[bank][pin] = cb;
+    if(enable_int)
+    {
+        if(level)
+            __REG_SET(HW_PINCTRL_IRQLEVEL(bank)) = 1 << pin;
+        else
+            __REG_CLR(HW_PINCTRL_IRQLEVEL(bank)) = 1 << pin;
+        if(polarity)
+            __REG_SET(HW_PINCTRL_IRQPOL(bank)) = 1 << pin;
+        else
+            __REG_CLR(HW_PINCTRL_IRQPOL(bank)) = 1 << pin;
+        __REG_SET(HW_PINCTRL_PIN2IRQ(bank)) = 1 << pin;
+        __REG_SET(HW_PINCTRL_IRQEN(bank)) = 1 << pin;
+        imx233_enable_interrupt(INT_SRC_GPIO(bank), true);
+    }
+}
diff --git a/firmware/target/arm/imx233/pinctrl-imx233.h b/firmware/target/arm/imx233/pinctrl-imx233.h
index a2e02adec4..ec23410442 100644
--- a/firmware/target/arm/imx233/pinctrl-imx233.h
+++ b/firmware/target/arm/imx233/pinctrl-imx233.h
@@ -51,6 +51,8 @@
 #define PINCTRL_DRIVE_12mA      2
 #define PINCTRL_DRIVE_16mA      3 /* not available on all pins */
 
+typedef void (*pin_irq_cb_t)(int bank, int pin);
+
 static inline void imx233_pinctrl_init(void)
 {
     __REG_CLR(HW_PINCTRL_CTRL) = __BLOCK_CLKGATE | __BLOCK_SFTRST;
@@ -121,4 +123,9 @@ static inline void imx233_enable_pin_pullup_mask(unsigned bank, uint32_t pin_msk
         __REG_CLR(HW_PINCTRL_PULL(bank)) = pin_msk;
 }
 
+/** On irq, the pin irq interrupt is disable and then cb is called;
+ * the setup_pin_irq function needs to be called again to enable it again */
+void imx233_setup_pin_irq(int bank, int pin, bool enable_int,
+    bool level, bool polarity, pin_irq_cb_t cb);
+
 #endif /* __PINCTRL_IMX233_H__ */
-- 
cgit v1.2.3