24 May
2011
24 May
'11
9:16 p.m.
---
nuttx/arch/arm/include/calypso/irq.h | 67 +++++++
nuttx/arch/arm/src/calypso/calypso_irq.c | 300
++++++++++++++++++++++++++++++
2 files changed, 367 insertions(+), 0 deletions(-)
create mode 100644 nuttx/arch/arm/include/calypso/irq.h
create mode 100644 nuttx/arch/arm/src/calypso/calypso_irq.c
diff --git a/nuttx/arch/arm/include/calypso/irq.h
b/nuttx/arch/arm/include/calypso/irq.h
new file mode 100644
index 0000000..1333a6e
--- /dev/null
+++ b/nuttx/arch/arm/include/calypso/irq.h
@@ -0,0 +1,67 @@
+/****************************************************************************
+ * arch/arm/include/calypso/irq.h
+ * Driver for Calypso IRQ controller
+ *
+ * (C) 2010 by Harald Welte <laforge(a)gnumonks.org>
+ * (C) 2011 by Stefan Richter <ichgeh(a)l--putt.de>
+ *
+ * All Rights Reserved
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+
****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_IRQ_H
+#error "This file should never be included directly! Use <nuttx/irq.h>"
+#endif
+
+#ifndef _CALYPSO_IRQ_H
+#define _CALYPSO_IRQ_H
+
+#ifndef __ASSEMBLY__
+
+enum irq_nr {
+ IRQ_WATCHDOG = 0,
+ IRQ_TIMER1 = 1,
+ IRQ_TIMER2 = 2,
+ IRQ_TSP_RX = 3,
+ IRQ_TPU_FRAME = 4,
+ IRQ_TPU_PAGE = 5,
+ IRQ_SIMCARD = 6,
+ IRQ_UART_MODEM = 7,
+ IRQ_KEYPAD_GPIO = 8,
+ IRQ_RTC_TIMER = 9,
+ IRQ_RTC_ALARM_I2C = 10,
+ IRQ_ULPD_GAUGING = 11,
+ IRQ_EXTERNAL = 12,
+ IRQ_SPI = 13,
+ IRQ_DMA = 14,
+ IRQ_API = 15,
+ IRQ_SIM_DETECT = 16,
+ IRQ_EXTERNAL_FIQ = 17,
+ IRQ_UART_IRDA = 18,
+ IRQ_ULPD_GSM_TIMER = 19,
+ IRQ_GEA = 20,
+ _NR_IRQS
+};
+
+#endif /* __ASSEMBLY__ */
+
+/* Don't use _NR_IRQS!!! Won't work in preprocessor... */
+#define NR_IRQS 21
+
+#define IRQ_SYSTIMER IRQ_TIMER2
+
+#endif /* _CALYPSO_IRQ_H */
diff --git a/nuttx/arch/arm/src/calypso/calypso_irq.c
b/nuttx/arch/arm/src/calypso/calypso_irq.c
new file mode 100644
index 0000000..993e475
--- /dev/null
+++ b/nuttx/arch/arm/src/calypso/calypso_irq.c
@@ -0,0 +1,300 @@
+/****************************************************************************
+ * arch/arm/src/calypso/calypso_irq.c
+ * Driver for Calypso IRQ controller
+ *
+ * (C) 2010 by Harald Welte <laforge(a)gnumonks.org>
+ * (C) 2011 by Stefan Richter <ichgeh(a)l--putt.de>
+ *
+ * All Rights Reserved
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+
****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+
****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <stdint.h>
+#include <nuttx/irq.h>
+#include <nuttx/arch.h>
+#include <arch/calypso/memory.h>
+
+#include "arm.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+
****************************************************************************/
+
+#define BASE_ADDR_IRQ 0xfffffa00
+#define BASE_ADDR_IBOOT_EXC 0x0080001C
+
+enum irq_reg {
+ IT_REG1 = 0x00,
+ IT_REG2 = 0x02,
+ MASK_IT_REG1 = 0x08,
+ MASK_IT_REG2 = 0x0a,
+ IRQ_NUM = 0x10,
+ FIQ_NUM = 0x12,
+ IRQ_CTRL = 0x14,
+};
+
+#define ILR_IRQ(x) (0x20 + (x*2))
+#define IRQ_REG(x) ((void *)BASE_ADDR_IRQ + (x))
+
+#ifndef ARRAY_SIZE
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#endif
+
+/****************************************************************************
+ * Public Data
+
****************************************************************************/
+
+volatile uint32_t *current_regs;
+extern uint32_t _exceptions;
+
+/****************************************************************************
+ * Private Data
+
****************************************************************************/
+
+static uint8_t default_irq_prio[] = {
+ [IRQ_WATCHDOG] = 0xff,
+ [IRQ_TIMER1] = 0xff,
+ [IRQ_TIMER2] = 0xff,
+ [IRQ_TSP_RX] = 0,
+ [IRQ_TPU_FRAME] = 3,
+ [IRQ_TPU_PAGE] = 0xff,
+ [IRQ_SIMCARD] = 0xff,
+ [IRQ_UART_MODEM] = 8,
+ [IRQ_KEYPAD_GPIO] = 4,
+ [IRQ_RTC_TIMER] = 9,
+ [IRQ_RTC_ALARM_I2C] = 10,
+ [IRQ_ULPD_GAUGING] = 2,
+ [IRQ_EXTERNAL] = 12,
+ [IRQ_SPI] = 0xff,
+ [IRQ_DMA] = 0xff,
+ [IRQ_API] = 0xff,
+ [IRQ_SIM_DETECT] = 0,
+ [IRQ_EXTERNAL_FIQ] = 7,
+ [IRQ_UART_IRDA] = 2,
+ [IRQ_ULPD_GSM_TIMER] = 1,
+ [IRQ_GEA] = 0xff,
+};
+
+/****************************************************************************
+ * Private Functions
+
****************************************************************************/
+
+static void _irq_enable(enum irq_nr nr, int enable)
+{
+ uint16_t *reg = IRQ_REG(MASK_IT_REG1);
+ uint16_t val;
+
+ if (nr > 15) {
+ reg = IRQ_REG(MASK_IT_REG2);
+ nr -= 16;
+ }
+
+ val = readw(reg);
+ if (enable)
+ val &= ~(1 << nr);
+ else
+ val |= (1 << nr);
+ writew(val, reg);
+}
+
+static void set_default_priorities(void)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(default_irq_prio); i++) {
+ uint16_t val;
+ uint8_t prio = default_irq_prio[i];
+ if (prio > 31)
+ prio = 31;
+
+ val = readw(IRQ_REG(ILR_IRQ(i)));
+ val &= ~(0x1f << 2);
+ val |= prio << 2;
+ writew(val, IRQ_REG(ILR_IRQ(i)));
+ }
+}
+
+/* Install the exception handlers to where the ROM loader jumps */
+static void calypso_exceptions_install(void)
+{
+ uint32_t *exceptions_dst = (uint32_t *) BASE_ADDR_IBOOT_EXC;
+ uint32_t *exceptions_src = &_exceptions;
+ int i;
+
+ for (i = 0; i < 7; i++)
+ *exceptions_dst++ = *exceptions_src++;
+
+}
+
+/****************************************************************************
+ * Public Functions
+
****************************************************************************/
+
+/****************************************************************************
+ * Name: up_irqinitialize
+ *
+ * Description:
+ * Setup the IRQ and FIQ controllers
+ *
+
****************************************************************************/
+
+void up_irqinitialize(void)
+{
+ /* Prepare hardware */
+ calypso_exceptions_install();
+ current_regs = NULL;
+
+ /* Switch to internal ROM */
+ calypso_bootrom(1);
+
+ /* set default priorities */
+ set_default_priorities();
+
+ /* mask all interrupts off */
+ writew(0xffff, IRQ_REG(MASK_IT_REG1));
+ writew(0xffff, IRQ_REG(MASK_IT_REG2));
+
+ /* clear all pending interrupts */
+ writew(0, IRQ_REG(IT_REG1));
+ writew(0, IRQ_REG(IT_REG2));
+
+ /* enable interrupts globally to the ARM core */
+#ifndef CONFIG_SUPPRESS_INTERRUPTS
+ irqrestore(SVC_MODE | PSR_F_BIT);
+#endif
+}
+
+/****************************************************************************
+ * Name: up_disable_irq
+ *
+ * Description:
+ * Disable the IRQ specified by 'irq'
+ *
+
****************************************************************************/
+
+void up_disable_irq(int irq)
+{
+ if((unsigned)irq < NR_IRQS)
+ _irq_enable(irq, 0);
+}
+
+/****************************************************************************
+ * Name: up_enable_irq
+ *
+ * Description:
+ * Enable the IRQ specified by 'irq'
+ *
+
****************************************************************************/
+
+void up_enable_irq(int irq)
+{
+ if((unsigned)irq < NR_IRQS)
+ _irq_enable(irq, 1);
+}
+
+/****************************************************************************
+ * Name: up_prioritize_irq
+ *
+ * Description:
+ * Set the priority of an IRQ.
+ *
+
****************************************************************************/
+
+#ifndef CONFIG_ARCH_IRQPRIO
+int up_prioritize_irq(int nr, int prio)
+{
+ uint16_t val;
+
+ if (prio == -1)
+ prio = default_irq_prio[nr];
+
+ if (prio > 31)
+ prio = 31;
+
+ val = prio << 2;
+/*
+ if (edge)
+ val |= 0x02;
+ if (fiq)
+ val |= 0x01;
+*/
+ writew(val, IRQ_REG(ILR_IRQ(nr)));
+
+ return 0; // XXX: what's the return???
+}
+#endif
+
+/****************************************************************************
+ * Entry point for interrupts
+
****************************************************************************/
+
+void up_decodeirq(uint32_t *regs)
+{
+ uint8_t num, tmp;
+ uint32_t *saved_regs;
+
+ /* XXX: What is this???
+ * Passed to but ignored in IRQ handlers
+ * Only valid meaning is apparently non-NULL == IRQ context */
+ saved_regs = (uint32_t *)current_regs;
+ current_regs = regs;
+
+ /* Detect & deliver the IRQ */
+ num = readb(IRQ_REG(IRQ_NUM)) & 0x1f;
+ irq_dispatch(num, regs);
+
+ /* Start new IRQ agreement */
+ tmp = readb(IRQ_REG(IRQ_CTRL));
+ tmp |= 0x01;
+ writeb(tmp, IRQ_REG(IRQ_CTRL));
+
+ current_regs = saved_regs;
+}
+
+/****************************************************************************
+ * Entry point for FIQs
+
****************************************************************************/
+
+void calypso_fiq(void)
+{
+ uint8_t num, tmp;
+ uint32_t *regs;
+
+ /* XXX: What is this???
+ * Passed to but ignored in IRQ handlers
+ * Only valid meaning is apparently non-NULL == IRQ context */
+ regs = (uint32_t *)current_regs;
+ current_regs = (uint32_t *)#
+
+ /* Detect & deliver like an IRQ but we are in FIQ context */
+ num = readb(IRQ_REG(FIQ_NUM)) & 0x1f;
+ irq_dispatch(num, regs);
+
+ /* Start new FIQ agreement */
+ tmp = readb(IRQ_REG(IRQ_CTRL));
+ tmp |= 0x02;
+ writeb(tmp, IRQ_REG(IRQ_CTRL));
+
+ current_regs = regs;
+}
--
1.7.1