Index: kernel/genarch/include/drivers/am335x_irc/am335x_irc.h =================================================================== --- kernel/genarch/include/drivers/am335x_irc/am335x_irc.h (revision d085df109266ca3c7cd68ff490a353f281809857) +++ kernel/genarch/include/drivers/am335x_irc/am335x_irc.h (revision d085df109266ca3c7cd68ff490a353f281809857) @@ -0,0 +1,183 @@ +/* + * Copyright (c) 2012 Maurizio Lombardi + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * - The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +/** @addtogroup genarch + * @{ + */ + +/** + * @file + * @brief Texas Instruments AM335x MPU on-chip interrupt controller driver. + */ + +#ifndef KERN_AM335x_IRQC_H_ +#define KERN_AM335x_IRQC_H_ + +#define AM335x_IRC_BASE_ADDRESS 0x48200000 +#define AM335x_IRC_SIZE 4096 + +#define AM335x_IRC_IRQ_COUNT 128 + +#include + +typedef struct { + const ioport32_t revision; +#define AM335x_IRC_REV_MASK 0xFF + + const uint8_t padd0[12]; + + ioport32_t sysconfig; +#define AM335x_IRC_SYSCONFIG_AUTOIDLE_FLAG (1 << 0) +#define AM335x_IRC_SYSCONFIG_SOFTRESET_FLAG (1 << 1) + + const ioport32_t sysstatus; +#define AM335x_IRC_SYSSTATUS_RESET_DONE_FLAG (1 << 0) + + const uint8_t padd1[40]; + + ioport32_t sir_irq; +#define AM335x_IRC_SIR_IRQ_ACTIVEIRQ_MASK 0x7F +#define AM335x_IRC_SIR_IRQ_SPURIOUSIRQFLAG_MASK 0xFFFFFFF8 + + const ioport32_t sir_fiq; +#define AM335x_IRC_FIQ_IRQ_ACTIVEFIQ_MASK 0x7F +#define AM335x_IRC_FIQ_IRQ_SPURIOUSFIQFLAG_MASK 0xFFFFFFF8 + + ioport32_t control; /* New IRQ/FIQ agreement */ +#define AM335x_IRC_CONTROL_NEWIRQAGR_FLAG (1 << 0) +#define AM335x_IRC_CONTROL_NEWFIQAGR_FLAG (1 << 1) + + ioport32_t protection; +#define AM335x_IRC_PROTECTION_FLAG (1 << 0) + + ioport32_t idle; +#define AM335x_IRC_IDLE_FUNCIDLE_FLAG (1 << 0) +#define AM335x_IRC_IDLE_TURBO_FLAG (1 << 1) + + const uint8_t padd2[12]; + + const ioport32_t irq_priority; +#define AM335x_IRC_IRQ_PRIORITY_IRQPRIORITY_MASK 0x7F +#define AM335x_IRC_IRQ_PRIORITY_SPURIOUSIRQFLAG_MASK 0xFFFFFFF8 + + const ioport32_t fiq_priority; +#define AM335x_IRC_FIQ_PRIORITY_FIQPRIORITY_MASK 0x7F +#define AM335x_IRC_FIQ_PRIORITY_SPURIOUSIRQFLAG_MASK 0xFFFFFFF8 + + ioport32_t threshold; +#define AM335x_IRC_THRESHOLD_PRIORITYTHRESHOLD_MASK 0xFF +#define AM335x_IRC_THRESHOLD_PRIORITYTHRESHOLD_ENABLED 0x00 +#define AM335x_IRC_THRESHOLD_PRIORITYTHRESHOLD_DISABLED 0xFF + + const uint8_t padd[20]; + + struct { + /* Raw interrupt input status before masking */ + const ioport32_t itr; + + /* Interrupt mask */ + ioport32_t mir; + + /* This register is used to clear the interrupt mask bits, + * Write 1 clears the mask bit to 0. + */ + ioport32_t mir_clear; + + /* This register is used to set the interrupt mask bits, + * Write 1 sets the mask bit to 1. + */ + ioport32_t mir_set; + + /* This register is used to set the software interrupt bits, + * it is also used to read the current active software + * interrupts. + * Write 1 sets the software interrups bits to 1. + */ + ioport32_t isr_set; + + /* This register is used to clear the software interrups bits. + * Write 1 clears the software interrupt bits to 0. + */ + ioport32_t isr_clear; + + /* This register contains the IRQ status after masking. */ + const ioport32_t pending_irq; + + /* This register contains the FIQ status after masking. */ + const ioport32_t pending_fiq; + } interrupts[4]; + + /* These registers contain the priority for the interrups and + * the FIQ/IRQ steering. + */ + ioport32_t ilr[AM335x_IRC_IRQ_COUNT]; +/* 0 = Interrupt routed to IRQ, 1 = interrupt routed to FIQ */ +#define AM335x_IRC_ILR_FIQNIRQ_FLAG (1 << 0) +#define AM335x_IRC_ILR_PRIORITY_MASK 0x3F +#define AM335x_IRC_ILR_PRIORITY_SHIFT 2 + +} am335x_irc_regs_t; + +static inline void am335x_irc_init(am335x_irc_regs_t *regs) +{ + int i; + + /* Initialization sequence */ + + /* 1 - Program the SYSCONFIG register: if necessary, enable the + * autogating by setting the AUTOIDLE bit. + */ + regs->sysconfig &= ~AM335x_IRC_SYSCONFIG_AUTOIDLE_FLAG; + + /* 2 - Program the IDLE register: if necessary, disable functional + * clock autogating or enable synchronizer autogating by setting + * the FUNCIDLE bit or the TURBO bit accordingly. + */ + regs->idle &= ~AM335x_IRC_IDLE_FUNCIDLE_FLAG; + regs->idle &= ~AM335x_IRC_IDLE_TURBO_FLAG; + + /* 3 - Program ILRm register for each interrupt line: Assign a + * priority level and set the FIQNIRQ bit for an FIQ interrupt + * (by default, interrupts are mapped to IRQ and + * priority is 0 (highest). + */ + + for (i = 0; i < AM335x_IRC_IRQ_COUNT; ++i) + regs->ilr[i] = 0; + + /* 4 - Program the MIRn register: Enable interrupts (by default, + * all interrupt lines are masked). + */ + for (i = 0; i < 4; ++i) + regs->interrupts[i].mir_set = 0xFFFFFFFF; +} + +#endif + +/** + * @} + */