+++ /dev/null
-/*
- * linux/arch/arm/mach-omap/fpga.c
- *
- * Interrupt handler for OMAP-1510 Innovator FPGA
- *
- * Copyright (C) 2001 RidgeRun, Inc.
- * Author: Greg Lonnon <glonnon@ridgerun.com>
- *
- * Copyright (C) 2002 MontaVista Software, Inc.
- *
- * Separated FPGA interrupts from innovator1510.c and cleaned up for 2.6
- * Copyright (C) 2004 Nokia Corporation by Tony Lindrgen <tony@atomide.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/config.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
-
-#include <asm/arch/fpga.h>
-#include <asm/arch/gpio.h>
-
-static void fpga_mask_irq(unsigned int irq)
-{
- irq -= OMAP1510_IH_FPGA_BASE;
-
- if (irq < 8)
- __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_LO)
- & ~(1 << irq)), OMAP1510_FPGA_IMR_LO);
- else if (irq < 16)
- __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_HI)
- & ~(1 << (irq - 8))), OMAP1510_FPGA_IMR_HI);
- else
- __raw_writeb((__raw_readb(INNOVATOR_FPGA_IMR2)
- & ~(1 << (irq - 16))), INNOVATOR_FPGA_IMR2);
-}
-
-
-static inline u32 get_fpga_unmasked_irqs(void)
-{
- return
- ((__raw_readb(OMAP1510_FPGA_ISR_LO) &
- __raw_readb(OMAP1510_FPGA_IMR_LO))) |
- ((__raw_readb(OMAP1510_FPGA_ISR_HI) &
- __raw_readb(OMAP1510_FPGA_IMR_HI)) << 8) |
- ((__raw_readb(INNOVATOR_FPGA_ISR2) &
- __raw_readb(INNOVATOR_FPGA_IMR2)) << 16);
-}
-
-
-static void fpga_ack_irq(unsigned int irq)
-{
- /* Don't need to explicitly ACK FPGA interrupts */
-}
-
-static void fpga_unmask_irq(unsigned int irq)
-{
- irq -= OMAP1510_IH_FPGA_BASE;
-
- if (irq < 8)
- __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_LO) | (1 << irq)),
- OMAP1510_FPGA_IMR_LO);
- else if (irq < 16)
- __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_HI)
- | (1 << (irq - 8))), OMAP1510_FPGA_IMR_HI);
- else
- __raw_writeb((__raw_readb(INNOVATOR_FPGA_IMR2)
- | (1 << (irq - 16))), INNOVATOR_FPGA_IMR2);
-}
-
-static void fpga_mask_ack_irq(unsigned int irq)
-{
- fpga_mask_irq(irq);
- fpga_ack_irq(irq);
-}
-
-void innovator_fpga_IRQ_demux(unsigned int irq, struct irqdesc *desc,
- struct pt_regs *regs)
-{
- struct irqdesc *d;
- u32 stat;
- int fpga_irq;
-
- stat = get_fpga_unmasked_irqs();
-
- if (!stat)
- return;
-
- for (fpga_irq = OMAP1510_IH_FPGA_BASE;
- (fpga_irq < (OMAP1510_IH_FPGA_BASE + NR_FPGA_IRQS)) && stat;
- fpga_irq++, stat >>= 1) {
- if (stat & 1) {
- d = irq_desc + fpga_irq;
- d->handle(fpga_irq, d, regs);
- }
- }
-}
-
-static struct irqchip omap_fpga_irq_ack = {
- .ack = fpga_mask_ack_irq,
- .mask = fpga_mask_irq,
- .unmask = fpga_unmask_irq,
-};
-
-
-static struct irqchip omap_fpga_irq = {
- .ack = fpga_ack_irq,
- .mask = fpga_mask_irq,
- .unmask = fpga_unmask_irq,
-};
-
-/*
- * All of the FPGA interrupt request inputs except for the touchscreen are
- * edge-sensitive; the touchscreen is level-sensitive. The edge-sensitive
- * interrupts are acknowledged as a side-effect of reading the interrupt
- * status register from the FPGA. The edge-sensitive interrupt inputs
- * cause a problem with level interrupt requests, such as Ethernet. The
- * problem occurs when a level interrupt request is asserted while its
- * interrupt input is masked in the FPGA, which results in a missed
- * interrupt.
- *
- * In an attempt to workaround the problem with missed interrupts, the
- * mask_ack routine for all of the FPGA interrupts has been changed from
- * fpga_mask_ack_irq() to fpga_ack_irq() so that the specific FPGA interrupt
- * being serviced is left unmasked. We can do this because the FPGA cascade
- * interrupt is installed with the SA_INTERRUPT flag, which leaves all
- * interrupts masked at the CPU while an FPGA interrupt handler executes.
- *
- * Limited testing indicates that this workaround appears to be effective
- * for the smc9194 Ethernet driver used on the Innovator. It should work
- * on other FPGA interrupts as well, but any drivers that explicitly mask
- * interrupts at the interrupt controller via disable_irq/enable_irq
- * could pose a problem.
- */
-void omap1510_fpga_init_irq(void)
-{
- int i;
-
- __raw_writeb(0, OMAP1510_FPGA_IMR_LO);
- __raw_writeb(0, OMAP1510_FPGA_IMR_HI);
- __raw_writeb(0, INNOVATOR_FPGA_IMR2);
-
- for (i = OMAP1510_IH_FPGA_BASE; i < (OMAP1510_IH_FPGA_BASE + NR_FPGA_IRQS); i++) {
-
- if (i == OMAP1510_INT_FPGA_TS) {
- /*
- * The touchscreen interrupt is level-sensitive, so
- * we'll use the regular mask_ack routine for it.
- */
- set_irq_chip(i, &omap_fpga_irq_ack);
- }
- else {
- /*
- * All FPGA interrupts except the touchscreen are
- * edge-sensitive, so we won't mask them.
- */
- set_irq_chip(i, &omap_fpga_irq);
- }
-
- set_irq_handler(i, do_edge_IRQ);
- set_irq_flags(i, IRQF_VALID);
- }
-
- /*
- * The FPGA interrupt line is connected to GPIO13. Claim this pin for
- * the ARM.
- *
- * NOTE: For general GPIO/MPUIO access and interrupts, please see
- * gpio.[ch]
- */
- omap_request_gpio(13);
- omap_set_gpio_direction(13, 1);
- omap_set_gpio_edge_ctrl(13, OMAP_GPIO_RISING_EDGE);
- set_irq_chained_handler(OMAP1510_INT_FPGA, innovator_fpga_IRQ_demux);
-}
-
-EXPORT_SYMBOL(omap1510_fpga_init_irq);
+++ /dev/null
-/*
- * linux/arch/arm/mach-omap/irq.c
- *
- * Interrupt handler for all OMAP boards
- *
- * Copyright (C) 2004 Nokia Corporation
- * Written by Tony Lindgren <tony@atomide.com>
- * Major cleanups by Juha Yrjölä <juha.yrjola@nokia.com>
- *
- * Completely re-written to support various OMAP chips with bank specific
- * interrupt handlers.
- *
- * Some snippets of the code taken from the older OMAP interrupt handler
- * Copyright (C) 2001 RidgeRun, Inc. Greg Lonnon <glonnon@ridgerun.com>
- *
- * GPIO interrupt handler moved to gpio.c by Juha Yrjola
- *
- * 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 PROVIDED ``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.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/ptrace.h>
-
-#include <asm/hardware.h>
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
-#include <asm/arch/gpio.h>
-
-#include <asm/io.h>
-
-#define IRQ_BANK(irq) ((irq) >> 5)
-#define IRQ_BIT(irq) ((irq) & 0x1f)
-
-struct omap_irq_bank {
- unsigned long base_reg;
- unsigned long trigger_map;
-};
-
-static unsigned int irq_bank_count = 0;
-static struct omap_irq_bank *irq_banks;
-
-static inline unsigned int irq_bank_readl(int bank, int offset)
-{
- return omap_readl(irq_banks[bank].base_reg + offset);
-}
-
-static inline void irq_bank_writel(unsigned long value, int bank, int offset)
-{
- omap_writel(value, irq_banks[bank].base_reg + offset);
-}
-
-static void omap_ack_irq(unsigned int irq)
-{
- if (irq > 31)
- omap_writel(0x1, OMAP_IH2_BASE + IRQ_CONTROL_REG_OFFSET);
-
- omap_writel(0x1, OMAP_IH1_BASE + IRQ_CONTROL_REG_OFFSET);
-}
-
-static void omap_mask_irq(unsigned int irq)
-{
- int bank = IRQ_BANK(irq);
- u32 l;
-
- l = omap_readl(irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
- l |= 1 << IRQ_BIT(irq);
- omap_writel(l, irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
-}
-
-static void omap_unmask_irq(unsigned int irq)
-{
- int bank = IRQ_BANK(irq);
- u32 l;
-
- l = omap_readl(irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
- l &= ~(1 << IRQ_BIT(irq));
- omap_writel(l, irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
-}
-
-static void omap_mask_ack_irq(unsigned int irq)
-{
- omap_mask_irq(irq);
- omap_ack_irq(irq);
-}
-
-/*
- * Allows tuning the IRQ type and priority
- *
- * NOTE: There is currently no OMAP fiq handler for Linux. Read the
- * mailing list threads on FIQ handlers if you are planning to
- * add a FIQ handler for OMAP.
- */
-static void omap_irq_set_cfg(int irq, int fiq, int priority, int trigger)
-{
- signed int bank;
- unsigned long val, offset;
-
- bank = IRQ_BANK(irq);
- /* FIQ is only available on bank 0 interrupts */
- fiq = bank ? 0 : (fiq & 0x1);
- val = fiq | ((priority & 0x1f) << 2) | ((trigger & 0x1) << 1);
- offset = IRQ_ILR0_REG_OFFSET + IRQ_BIT(irq) * 0x4;
- irq_bank_writel(val, bank, offset);
-}
-
-#ifdef CONFIG_ARCH_OMAP730
-static struct omap_irq_bank omap730_irq_banks[] = {
- { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3f8e22f },
- { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xfdb9c1f2 },
- { .base_reg = OMAP_IH2_BASE + 0x100, .trigger_map = 0x800040f3 },
-};
-#endif
-
-#ifdef CONFIG_ARCH_OMAP1510
-static struct omap_irq_bank omap1510_irq_banks[] = {
- { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3febfff },
- { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xffbfffed },
-};
-#endif
-
-#if defined(CONFIG_ARCH_OMAP16XX)
-
-static struct omap_irq_bank omap1610_irq_banks[] = {
- { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3fefe8f },
- { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xfdb7c1fd },
- { .base_reg = OMAP_IH2_BASE + 0x100, .trigger_map = 0xfffff7ff },
- { .base_reg = OMAP_IH2_BASE + 0x200, .trigger_map = 0xffffffff },
-};
-#endif
-
-static struct irqchip omap_irq_chip = {
- .ack = omap_mask_ack_irq,
- .mask = omap_mask_irq,
- .unmask = omap_unmask_irq,
-};
-
-void __init omap_init_irq(void)
-{
- int i, j;
-
-#ifdef CONFIG_ARCH_OMAP730
- if (cpu_is_omap730()) {
- irq_banks = omap730_irq_banks;
- irq_bank_count = ARRAY_SIZE(omap730_irq_banks);
- }
-#endif
-#ifdef CONFIG_ARCH_OMAP1510
- if (cpu_is_omap1510()) {
- irq_banks = omap1510_irq_banks;
- irq_bank_count = ARRAY_SIZE(omap1510_irq_banks);
- }
-#endif
-#if defined(CONFIG_ARCH_OMAP16XX)
- if (cpu_is_omap16xx()) {
- irq_banks = omap1610_irq_banks;
- irq_bank_count = ARRAY_SIZE(omap1610_irq_banks);
- }
-#endif
- printk("Total of %i interrupts in %i interrupt banks\n",
- irq_bank_count * 32, irq_bank_count);
-
- /* Mask and clear all interrupts */
- for (i = 0; i < irq_bank_count; i++) {
- irq_bank_writel(~0x0, i, IRQ_MIR_REG_OFFSET);
- irq_bank_writel(0x0, i, IRQ_ITR_REG_OFFSET);
- }
-
- /* Clear any pending interrupts */
- irq_bank_writel(0x03, 0, IRQ_CONTROL_REG_OFFSET);
- irq_bank_writel(0x03, 1, IRQ_CONTROL_REG_OFFSET);
-
- /* Enable interrupts in global mask */
- if (cpu_is_omap730()) {
- irq_bank_writel(0x0, 0, IRQ_GMR_REG_OFFSET);
- }
-
- /* Install the interrupt handlers for each bank */
- for (i = 0; i < irq_bank_count; i++) {
- for (j = i * 32; j < (i + 1) * 32; j++) {
- int irq_trigger;
-
- irq_trigger = irq_banks[i].trigger_map >> IRQ_BIT(j);
- omap_irq_set_cfg(j, 0, 0, irq_trigger);
-
- set_irq_chip(j, &omap_irq_chip);
- set_irq_handler(j, do_level_IRQ);
- set_irq_flags(j, IRQF_VALID);
- }
- }
-
- /* Unmask level 2 handler */
- if (cpu_is_omap730()) {
- omap_unmask_irq(INT_730_IH2_IRQ);
- } else {
- omap_unmask_irq(INT_IH2_IRQ);
- }
-}
+++ /dev/null
-/*
- * linux/arch/arm/mach-omap/time.c
- *
- * OMAP Timers
- *
- * Copyright (C) 2004 Nokia Corporation
- * Partial timer rewrite and additional dynamic tick timer support by
- * Tony Lindgen <tony@atomide.com> and
- * Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
- *
- * MPU timer code based on the older MPU timer code for OMAP
- * Copyright (C) 2000 RidgeRun, Inc.
- * Author: Greg Lonnon <glonnon@ridgerun.com>
- *
- * 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 PROVIDED ``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.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-
-#include <asm/system.h>
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/leds.h>
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
-#include <asm/mach/time.h>
-
-struct sys_timer omap_timer;
-
-#ifdef CONFIG_OMAP_MPU_TIMER
-
-/*
- * ---------------------------------------------------------------------------
- * MPU timer
- * ---------------------------------------------------------------------------
- */
-#define OMAP_MPU_TIMER1_BASE (0xfffec500)
-#define OMAP_MPU_TIMER2_BASE (0xfffec600)
-#define OMAP_MPU_TIMER3_BASE (0xfffec700)
-#define OMAP_MPU_TIMER_BASE OMAP_MPU_TIMER1_BASE
-#define OMAP_MPU_TIMER_OFFSET 0x100
-
-#define MPU_TIMER_FREE (1 << 6)
-#define MPU_TIMER_CLOCK_ENABLE (1 << 5)
-#define MPU_TIMER_AR (1 << 1)
-#define MPU_TIMER_ST (1 << 0)
-
-/* cycles to nsec conversions taken from arch/i386/kernel/timers/timer_tsc.c,
- * converted to use kHz by Kevin Hilman */
-/* convert from cycles(64bits) => nanoseconds (64bits)
- * basic equation:
- * ns = cycles / (freq / ns_per_sec)
- * ns = cycles * (ns_per_sec / freq)
- * ns = cycles * (10^9 / (cpu_khz * 10^3))
- * ns = cycles * (10^6 / cpu_khz)
- *
- * Then we use scaling math (suggested by george at mvista.com) to get:
- * ns = cycles * (10^6 * SC / cpu_khz / SC
- * ns = cycles * cyc2ns_scale / SC
- *
- * And since SC is a constant power of two, we can convert the div
- * into a shift.
- * -johnstul at us.ibm.com "math is hard, lets go shopping!"
- */
-static unsigned long cyc2ns_scale;
-#define CYC2NS_SCALE_FACTOR 10 /* 2^10, carefully chosen */
-
-static inline void set_cyc2ns_scale(unsigned long cpu_khz)
-{
- cyc2ns_scale = (1000000 << CYC2NS_SCALE_FACTOR)/cpu_khz;
-}
-
-static inline unsigned long long cycles_2_ns(unsigned long long cyc)
-{
- return (cyc * cyc2ns_scale) >> CYC2NS_SCALE_FACTOR;
-}
-
-/*
- * MPU_TICKS_PER_SEC must be an even number, otherwise machinecycles_to_usecs
- * will break. On P2, the timer count rate is 6.5 MHz after programming PTV
- * with 0. This divides the 13MHz input by 2, and is undocumented.
- */
-#ifdef CONFIG_MACH_OMAP_PERSEUS2
-/* REVISIT: This ifdef construct should be replaced by a query to clock
- * framework to see if timer base frequency is 12.0, 13.0 or 19.2 MHz.
- */
-#define MPU_TICKS_PER_SEC (13000000 / 2)
-#else
-#define MPU_TICKS_PER_SEC (12000000 / 2)
-#endif
-
-#define MPU_TIMER_TICK_PERIOD ((MPU_TICKS_PER_SEC / HZ) - 1)
-
-typedef struct {
- u32 cntl; /* CNTL_TIMER, R/W */
- u32 load_tim; /* LOAD_TIM, W */
- u32 read_tim; /* READ_TIM, R */
-} omap_mpu_timer_regs_t;
-
-#define omap_mpu_timer_base(n) \
-((volatile omap_mpu_timer_regs_t*)IO_ADDRESS(OMAP_MPU_TIMER_BASE + \
- (n)*OMAP_MPU_TIMER_OFFSET))
-
-static inline unsigned long omap_mpu_timer_read(int nr)
-{
- volatile omap_mpu_timer_regs_t* timer = omap_mpu_timer_base(nr);
- return timer->read_tim;
-}
-
-static inline void omap_mpu_timer_start(int nr, unsigned long load_val)
-{
- volatile omap_mpu_timer_regs_t* timer = omap_mpu_timer_base(nr);
-
- timer->cntl = MPU_TIMER_CLOCK_ENABLE;
- udelay(1);
- timer->load_tim = load_val;
- udelay(1);
- timer->cntl = (MPU_TIMER_CLOCK_ENABLE | MPU_TIMER_AR | MPU_TIMER_ST);
-}
-
-unsigned long omap_mpu_timer_ticks_to_usecs(unsigned long nr_ticks)
-{
- unsigned long long nsec;
-
- nsec = cycles_2_ns((unsigned long long)nr_ticks);
- return (unsigned long)nsec / 1000;
-}
-
-/*
- * Last processed system timer interrupt
- */
-static unsigned long omap_mpu_timer_last = 0;
-
-/*
- * Returns elapsed usecs since last system timer interrupt
- */
-static unsigned long omap_mpu_timer_gettimeoffset(void)
-{
- unsigned long now = 0 - omap_mpu_timer_read(0);
- unsigned long elapsed = now - omap_mpu_timer_last;
-
- return omap_mpu_timer_ticks_to_usecs(elapsed);
-}
-
-/*
- * Elapsed time between interrupts is calculated using timer0.
- * Latency during the interrupt is calculated using timer1.
- * Both timer0 and timer1 are counting at 6MHz (P2 6.5MHz).
- */
-static irqreturn_t omap_mpu_timer_interrupt(int irq, void *dev_id,
- struct pt_regs *regs)
-{
- unsigned long now, latency;
-
- write_seqlock(&xtime_lock);
- now = 0 - omap_mpu_timer_read(0);
- latency = MPU_TICKS_PER_SEC / HZ - omap_mpu_timer_read(1);
- omap_mpu_timer_last = now - latency;
- timer_tick(regs);
- write_sequnlock(&xtime_lock);
-
- return IRQ_HANDLED;
-}
-
-static struct irqaction omap_mpu_timer_irq = {
- .name = "mpu timer",
- .flags = SA_INTERRUPT | SA_TIMER,
- .handler = omap_mpu_timer_interrupt,
-};
-
-static unsigned long omap_mpu_timer1_overflows;
-static irqreturn_t omap_mpu_timer1_interrupt(int irq, void *dev_id,
- struct pt_regs *regs)
-{
- omap_mpu_timer1_overflows++;
- return IRQ_HANDLED;
-}
-
-static struct irqaction omap_mpu_timer1_irq = {
- .name = "mpu timer1 overflow",
- .flags = SA_INTERRUPT,
- .handler = omap_mpu_timer1_interrupt,
-};
-
-static __init void omap_init_mpu_timer(void)
-{
- set_cyc2ns_scale(MPU_TICKS_PER_SEC / 1000);
- omap_timer.offset = omap_mpu_timer_gettimeoffset;
- setup_irq(INT_TIMER1, &omap_mpu_timer1_irq);
- setup_irq(INT_TIMER2, &omap_mpu_timer_irq);
- omap_mpu_timer_start(0, 0xffffffff);
- omap_mpu_timer_start(1, MPU_TIMER_TICK_PERIOD);
-}
-
-/*
- * Scheduler clock - returns current time in nanosec units.
- */
-unsigned long long sched_clock(void)
-{
- unsigned long ticks = 0 - omap_mpu_timer_read(0);
- unsigned long long ticks64;
-
- ticks64 = omap_mpu_timer1_overflows;
- ticks64 <<= 32;
- ticks64 |= ticks;
-
- return cycles_2_ns(ticks64);
-}
-#endif /* CONFIG_OMAP_MPU_TIMER */
-
-#ifdef CONFIG_OMAP_32K_TIMER
-
-#ifdef CONFIG_ARCH_OMAP1510
-#error OMAP 32KHz timer does not currently work on 1510!
-#endif
-
-/*
- * ---------------------------------------------------------------------------
- * 32KHz OS timer
- *
- * This currently works only on 16xx, as 1510 does not have the continuous
- * 32KHz synchronous timer. The 32KHz synchronous timer is used to keep track
- * of time in addition to the 32KHz OS timer. Using only the 32KHz OS timer
- * on 1510 would be possible, but the timer would not be as accurate as
- * with the 32KHz synchronized timer.
- * ---------------------------------------------------------------------------
- */
-#define OMAP_32K_TIMER_BASE 0xfffb9000
-#define OMAP_32K_TIMER_CR 0x08
-#define OMAP_32K_TIMER_TVR 0x00
-#define OMAP_32K_TIMER_TCR 0x04
-
-#define OMAP_32K_TICKS_PER_HZ (32768 / HZ)
-
-/*
- * TRM says 1 / HZ = ( TVR + 1) / 32768, so TRV = (32768 / HZ) - 1
- * so with HZ = 100, TVR = 327.68.
- */
-#define OMAP_32K_TIMER_TICK_PERIOD ((32768 / HZ) - 1)
-#define TIMER_32K_SYNCHRONIZED 0xfffbc410
-
-#define JIFFIES_TO_HW_TICKS(nr_jiffies, clock_rate) \
- (((nr_jiffies) * (clock_rate)) / HZ)
-
-static inline void omap_32k_timer_write(int val, int reg)
-{
- omap_writew(val, reg + OMAP_32K_TIMER_BASE);
-}
-
-static inline unsigned long omap_32k_timer_read(int reg)
-{
- return omap_readl(reg + OMAP_32K_TIMER_BASE) & 0xffffff;
-}
-
-/*
- * The 32KHz synchronized timer is an additional timer on 16xx.
- * It is always running.
- */
-static inline unsigned long omap_32k_sync_timer_read(void)
-{
- return omap_readl(TIMER_32K_SYNCHRONIZED);
-}
-
-static inline void omap_32k_timer_start(unsigned long load_val)
-{
- omap_32k_timer_write(load_val, OMAP_32K_TIMER_TVR);
- omap_32k_timer_write(0x0f, OMAP_32K_TIMER_CR);
-}
-
-static inline void omap_32k_timer_stop(void)
-{
- omap_32k_timer_write(0x0, OMAP_32K_TIMER_CR);
-}
-
-/*
- * Rounds down to nearest usec
- */
-static inline unsigned long omap_32k_ticks_to_usecs(unsigned long ticks_32k)
-{
- return (ticks_32k * 5*5*5*5*5*5) >> 9;
-}
-
-static unsigned long omap_32k_last_tick = 0;
-
-/*
- * Returns elapsed usecs since last 32k timer interrupt
- */
-static unsigned long omap_32k_timer_gettimeoffset(void)
-{
- unsigned long now = omap_32k_sync_timer_read();
- return omap_32k_ticks_to_usecs(now - omap_32k_last_tick);
-}
-
-/*
- * Timer interrupt for 32KHz timer. When dynamic tick is enabled, this
- * function is also called from other interrupts to remove latency
- * issues with dynamic tick. In the dynamic tick case, we need to lock
- * with irqsave.
- */
-static irqreturn_t omap_32k_timer_interrupt(int irq, void *dev_id,
- struct pt_regs *regs)
-{
- unsigned long flags;
- unsigned long now;
-
- write_seqlock_irqsave(&xtime_lock, flags);
- now = omap_32k_sync_timer_read();
-
- while (now - omap_32k_last_tick >= OMAP_32K_TICKS_PER_HZ) {
- omap_32k_last_tick += OMAP_32K_TICKS_PER_HZ;
- timer_tick(regs);
- }
-
- /* Restart timer so we don't drift off due to modulo or dynamic tick.
- * By default we program the next timer to be continuous to avoid
- * latencies during high system load. During dynamic tick operation the
- * continuous timer can be overridden from pm_idle to be longer.
- */
- omap_32k_timer_start(omap_32k_last_tick + OMAP_32K_TICKS_PER_HZ - now);
- write_sequnlock_irqrestore(&xtime_lock, flags);
-
- return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_NO_IDLE_HZ
-/*
- * Programs the next timer interrupt needed. Called when dynamic tick is
- * enabled, and to reprogram the ticks to skip from pm_idle. Note that
- * we can keep the timer continuous, and don't need to set it to run in
- * one-shot mode. This is because the timer will get reprogrammed again
- * after next interrupt.
- */
-void omap_32k_timer_reprogram(unsigned long next_tick)
-{
- omap_32k_timer_start(JIFFIES_TO_HW_TICKS(next_tick, 32768) + 1);
-}
-
-static struct irqaction omap_32k_timer_irq;
-extern struct timer_update_handler timer_update;
-
-static int omap_32k_timer_enable_dyn_tick(void)
-{
- /* No need to reprogram timer, just use the next interrupt */
- return 0;
-}
-
-static int omap_32k_timer_disable_dyn_tick(void)
-{
- omap_32k_timer_start(OMAP_32K_TIMER_TICK_PERIOD);
- return 0;
-}
-
-static struct dyn_tick_timer omap_dyn_tick_timer = {
- .enable = omap_32k_timer_enable_dyn_tick,
- .disable = omap_32k_timer_disable_dyn_tick,
- .reprogram = omap_32k_timer_reprogram,
- .handler = omap_32k_timer_interrupt,
-};
-#endif /* CONFIG_NO_IDLE_HZ */
-
-static struct irqaction omap_32k_timer_irq = {
- .name = "32KHz timer",
- .flags = SA_INTERRUPT | SA_TIMER,
- .handler = omap_32k_timer_interrupt,
-};
-
-static __init void omap_init_32k_timer(void)
-{
-
-#ifdef CONFIG_NO_IDLE_HZ
- omap_timer.dyn_tick = &omap_dyn_tick_timer;
-#endif
-
- setup_irq(INT_OS_TIMER, &omap_32k_timer_irq);
- omap_timer.offset = omap_32k_timer_gettimeoffset;
- omap_32k_last_tick = omap_32k_sync_timer_read();
- omap_32k_timer_start(OMAP_32K_TIMER_TICK_PERIOD);
-}
-#endif /* CONFIG_OMAP_32K_TIMER */
-
-/*
- * ---------------------------------------------------------------------------
- * Timer initialization
- * ---------------------------------------------------------------------------
- */
-void __init omap_timer_init(void)
-{
-#if defined(CONFIG_OMAP_MPU_TIMER)
- omap_init_mpu_timer();
-#elif defined(CONFIG_OMAP_32K_TIMER)
- omap_init_32k_timer();
-#else
-#error No system timer selected in Kconfig!
-#endif
-}
-
-struct sys_timer omap_timer = {
- .init = omap_timer_init,
- .offset = NULL, /* Initialized later */
-};
--- /dev/null
+/*
+ * linux/arch/arm/mach-omap/fpga.c
+ *
+ * Interrupt handler for OMAP-1510 Innovator FPGA
+ *
+ * Copyright (C) 2001 RidgeRun, Inc.
+ * Author: Greg Lonnon <glonnon@ridgerun.com>
+ *
+ * Copyright (C) 2002 MontaVista Software, Inc.
+ *
+ * Separated FPGA interrupts from innovator1510.c and cleaned up for 2.6
+ * Copyright (C) 2004 Nokia Corporation by Tony Lindrgen <tony@atomide.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+
+#include <asm/arch/fpga.h>
+#include <asm/arch/gpio.h>
+
+static void fpga_mask_irq(unsigned int irq)
+{
+ irq -= OMAP1510_IH_FPGA_BASE;
+
+ if (irq < 8)
+ __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_LO)
+ & ~(1 << irq)), OMAP1510_FPGA_IMR_LO);
+ else if (irq < 16)
+ __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_HI)
+ & ~(1 << (irq - 8))), OMAP1510_FPGA_IMR_HI);
+ else
+ __raw_writeb((__raw_readb(INNOVATOR_FPGA_IMR2)
+ & ~(1 << (irq - 16))), INNOVATOR_FPGA_IMR2);
+}
+
+
+static inline u32 get_fpga_unmasked_irqs(void)
+{
+ return
+ ((__raw_readb(OMAP1510_FPGA_ISR_LO) &
+ __raw_readb(OMAP1510_FPGA_IMR_LO))) |
+ ((__raw_readb(OMAP1510_FPGA_ISR_HI) &
+ __raw_readb(OMAP1510_FPGA_IMR_HI)) << 8) |
+ ((__raw_readb(INNOVATOR_FPGA_ISR2) &
+ __raw_readb(INNOVATOR_FPGA_IMR2)) << 16);
+}
+
+
+static void fpga_ack_irq(unsigned int irq)
+{
+ /* Don't need to explicitly ACK FPGA interrupts */
+}
+
+static void fpga_unmask_irq(unsigned int irq)
+{
+ irq -= OMAP1510_IH_FPGA_BASE;
+
+ if (irq < 8)
+ __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_LO) | (1 << irq)),
+ OMAP1510_FPGA_IMR_LO);
+ else if (irq < 16)
+ __raw_writeb((__raw_readb(OMAP1510_FPGA_IMR_HI)
+ | (1 << (irq - 8))), OMAP1510_FPGA_IMR_HI);
+ else
+ __raw_writeb((__raw_readb(INNOVATOR_FPGA_IMR2)
+ | (1 << (irq - 16))), INNOVATOR_FPGA_IMR2);
+}
+
+static void fpga_mask_ack_irq(unsigned int irq)
+{
+ fpga_mask_irq(irq);
+ fpga_ack_irq(irq);
+}
+
+void innovator_fpga_IRQ_demux(unsigned int irq, struct irqdesc *desc,
+ struct pt_regs *regs)
+{
+ struct irqdesc *d;
+ u32 stat;
+ int fpga_irq;
+
+ stat = get_fpga_unmasked_irqs();
+
+ if (!stat)
+ return;
+
+ for (fpga_irq = OMAP1510_IH_FPGA_BASE;
+ (fpga_irq < (OMAP1510_IH_FPGA_BASE + NR_FPGA_IRQS)) && stat;
+ fpga_irq++, stat >>= 1) {
+ if (stat & 1) {
+ d = irq_desc + fpga_irq;
+ d->handle(fpga_irq, d, regs);
+ }
+ }
+}
+
+static struct irqchip omap_fpga_irq_ack = {
+ .ack = fpga_mask_ack_irq,
+ .mask = fpga_mask_irq,
+ .unmask = fpga_unmask_irq,
+};
+
+
+static struct irqchip omap_fpga_irq = {
+ .ack = fpga_ack_irq,
+ .mask = fpga_mask_irq,
+ .unmask = fpga_unmask_irq,
+};
+
+/*
+ * All of the FPGA interrupt request inputs except for the touchscreen are
+ * edge-sensitive; the touchscreen is level-sensitive. The edge-sensitive
+ * interrupts are acknowledged as a side-effect of reading the interrupt
+ * status register from the FPGA. The edge-sensitive interrupt inputs
+ * cause a problem with level interrupt requests, such as Ethernet. The
+ * problem occurs when a level interrupt request is asserted while its
+ * interrupt input is masked in the FPGA, which results in a missed
+ * interrupt.
+ *
+ * In an attempt to workaround the problem with missed interrupts, the
+ * mask_ack routine for all of the FPGA interrupts has been changed from
+ * fpga_mask_ack_irq() to fpga_ack_irq() so that the specific FPGA interrupt
+ * being serviced is left unmasked. We can do this because the FPGA cascade
+ * interrupt is installed with the SA_INTERRUPT flag, which leaves all
+ * interrupts masked at the CPU while an FPGA interrupt handler executes.
+ *
+ * Limited testing indicates that this workaround appears to be effective
+ * for the smc9194 Ethernet driver used on the Innovator. It should work
+ * on other FPGA interrupts as well, but any drivers that explicitly mask
+ * interrupts at the interrupt controller via disable_irq/enable_irq
+ * could pose a problem.
+ */
+void omap1510_fpga_init_irq(void)
+{
+ int i;
+
+ __raw_writeb(0, OMAP1510_FPGA_IMR_LO);
+ __raw_writeb(0, OMAP1510_FPGA_IMR_HI);
+ __raw_writeb(0, INNOVATOR_FPGA_IMR2);
+
+ for (i = OMAP1510_IH_FPGA_BASE; i < (OMAP1510_IH_FPGA_BASE + NR_FPGA_IRQS); i++) {
+
+ if (i == OMAP1510_INT_FPGA_TS) {
+ /*
+ * The touchscreen interrupt is level-sensitive, so
+ * we'll use the regular mask_ack routine for it.
+ */
+ set_irq_chip(i, &omap_fpga_irq_ack);
+ }
+ else {
+ /*
+ * All FPGA interrupts except the touchscreen are
+ * edge-sensitive, so we won't mask them.
+ */
+ set_irq_chip(i, &omap_fpga_irq);
+ }
+
+ set_irq_handler(i, do_edge_IRQ);
+ set_irq_flags(i, IRQF_VALID);
+ }
+
+ /*
+ * The FPGA interrupt line is connected to GPIO13. Claim this pin for
+ * the ARM.
+ *
+ * NOTE: For general GPIO/MPUIO access and interrupts, please see
+ * gpio.[ch]
+ */
+ omap_request_gpio(13);
+ omap_set_gpio_direction(13, 1);
+ omap_set_gpio_edge_ctrl(13, OMAP_GPIO_RISING_EDGE);
+ set_irq_chained_handler(OMAP1510_INT_FPGA, innovator_fpga_IRQ_demux);
+}
+
+EXPORT_SYMBOL(omap1510_fpga_init_irq);
--- /dev/null
+/*
+ * linux/arch/arm/mach-omap/irq.c
+ *
+ * Interrupt handler for all OMAP boards
+ *
+ * Copyright (C) 2004 Nokia Corporation
+ * Written by Tony Lindgren <tony@atomide.com>
+ * Major cleanups by Juha Yrjölä <juha.yrjola@nokia.com>
+ *
+ * Completely re-written to support various OMAP chips with bank specific
+ * interrupt handlers.
+ *
+ * Some snippets of the code taken from the older OMAP interrupt handler
+ * Copyright (C) 2001 RidgeRun, Inc. Greg Lonnon <glonnon@ridgerun.com>
+ *
+ * GPIO interrupt handler moved to gpio.c by Juha Yrjola
+ *
+ * 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 PROVIDED ``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.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+#include <asm/arch/gpio.h>
+
+#include <asm/io.h>
+
+#define IRQ_BANK(irq) ((irq) >> 5)
+#define IRQ_BIT(irq) ((irq) & 0x1f)
+
+struct omap_irq_bank {
+ unsigned long base_reg;
+ unsigned long trigger_map;
+ unsigned long wake_enable;
+};
+
+static unsigned int irq_bank_count = 0;
+static struct omap_irq_bank *irq_banks;
+
+static inline unsigned int irq_bank_readl(int bank, int offset)
+{
+ return omap_readl(irq_banks[bank].base_reg + offset);
+}
+
+static inline void irq_bank_writel(unsigned long value, int bank, int offset)
+{
+ omap_writel(value, irq_banks[bank].base_reg + offset);
+}
+
+static void omap_ack_irq(unsigned int irq)
+{
+ if (irq > 31)
+ omap_writel(0x1, OMAP_IH2_BASE + IRQ_CONTROL_REG_OFFSET);
+
+ omap_writel(0x1, OMAP_IH1_BASE + IRQ_CONTROL_REG_OFFSET);
+}
+
+static void omap_mask_irq(unsigned int irq)
+{
+ int bank = IRQ_BANK(irq);
+ u32 l;
+
+ l = omap_readl(irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
+ l |= 1 << IRQ_BIT(irq);
+ omap_writel(l, irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
+}
+
+static void omap_unmask_irq(unsigned int irq)
+{
+ int bank = IRQ_BANK(irq);
+ u32 l;
+
+ l = omap_readl(irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
+ l &= ~(1 << IRQ_BIT(irq));
+ omap_writel(l, irq_banks[bank].base_reg + IRQ_MIR_REG_OFFSET);
+}
+
+static void omap_mask_ack_irq(unsigned int irq)
+{
+ omap_mask_irq(irq);
+ omap_ack_irq(irq);
+}
+
+static int omap_wake_irq(unsigned int irq, unsigned int enable)
+{
+ int bank = IRQ_BANK(irq);
+
+ if (enable)
+ irq_banks[bank].wake_enable |= IRQ_BIT(irq);
+ else
+ irq_banks[bank].wake_enable &= ~IRQ_BIT(irq);
+
+ return 0;
+}
+
+
+/*
+ * Allows tuning the IRQ type and priority
+ *
+ * NOTE: There is currently no OMAP fiq handler for Linux. Read the
+ * mailing list threads on FIQ handlers if you are planning to
+ * add a FIQ handler for OMAP.
+ */
+static void omap_irq_set_cfg(int irq, int fiq, int priority, int trigger)
+{
+ signed int bank;
+ unsigned long val, offset;
+
+ bank = IRQ_BANK(irq);
+ /* FIQ is only available on bank 0 interrupts */
+ fiq = bank ? 0 : (fiq & 0x1);
+ val = fiq | ((priority & 0x1f) << 2) | ((trigger & 0x1) << 1);
+ offset = IRQ_ILR0_REG_OFFSET + IRQ_BIT(irq) * 0x4;
+ irq_bank_writel(val, bank, offset);
+}
+
+#ifdef CONFIG_ARCH_OMAP730
+static struct omap_irq_bank omap730_irq_banks[] = {
+ { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3f8e22f },
+ { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xfdb9c1f2 },
+ { .base_reg = OMAP_IH2_BASE + 0x100, .trigger_map = 0x800040f3 },
+};
+#endif
+
+#ifdef CONFIG_ARCH_OMAP1510
+static struct omap_irq_bank omap1510_irq_banks[] = {
+ { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3febfff },
+ { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xffbfffed },
+};
+#endif
+
+#if defined(CONFIG_ARCH_OMAP16XX)
+
+static struct omap_irq_bank omap1610_irq_banks[] = {
+ { .base_reg = OMAP_IH1_BASE, .trigger_map = 0xb3fefe8f },
+ { .base_reg = OMAP_IH2_BASE, .trigger_map = 0xfdb7c1fd },
+ { .base_reg = OMAP_IH2_BASE + 0x100, .trigger_map = 0xffffb7ff },
+ { .base_reg = OMAP_IH2_BASE + 0x200, .trigger_map = 0xffffffff },
+};
+#endif
+
+static struct irqchip omap_irq_chip = {
+ .ack = omap_mask_ack_irq,
+ .mask = omap_mask_irq,
+ .unmask = omap_unmask_irq,
+ .wake = omap_wake_irq,
+};
+
+void __init omap_init_irq(void)
+{
+ int i, j;
+
+#ifdef CONFIG_ARCH_OMAP730
+ if (cpu_is_omap730()) {
+ irq_banks = omap730_irq_banks;
+ irq_bank_count = ARRAY_SIZE(omap730_irq_banks);
+ }
+#endif
+#ifdef CONFIG_ARCH_OMAP1510
+ if (cpu_is_omap1510()) {
+ irq_banks = omap1510_irq_banks;
+ irq_bank_count = ARRAY_SIZE(omap1510_irq_banks);
+ }
+#endif
+#if defined(CONFIG_ARCH_OMAP16XX)
+ if (cpu_is_omap16xx()) {
+ irq_banks = omap1610_irq_banks;
+ irq_bank_count = ARRAY_SIZE(omap1610_irq_banks);
+ }
+#endif
+ printk("Total of %i interrupts in %i interrupt banks\n",
+ irq_bank_count * 32, irq_bank_count);
+
+ /* Mask and clear all interrupts */
+ for (i = 0; i < irq_bank_count; i++) {
+ irq_bank_writel(~0x0, i, IRQ_MIR_REG_OFFSET);
+ irq_bank_writel(0x0, i, IRQ_ITR_REG_OFFSET);
+ }
+
+ /* Clear any pending interrupts */
+ irq_bank_writel(0x03, 0, IRQ_CONTROL_REG_OFFSET);
+ irq_bank_writel(0x03, 1, IRQ_CONTROL_REG_OFFSET);
+
+ /* Enable interrupts in global mask */
+ if (cpu_is_omap730()) {
+ irq_bank_writel(0x0, 0, IRQ_GMR_REG_OFFSET);
+ }
+
+ /* Install the interrupt handlers for each bank */
+ for (i = 0; i < irq_bank_count; i++) {
+ for (j = i * 32; j < (i + 1) * 32; j++) {
+ int irq_trigger;
+
+ irq_trigger = irq_banks[i].trigger_map >> IRQ_BIT(j);
+ omap_irq_set_cfg(j, 0, 0, irq_trigger);
+
+ set_irq_chip(j, &omap_irq_chip);
+ set_irq_handler(j, do_level_IRQ);
+ set_irq_flags(j, IRQF_VALID);
+ }
+ }
+
+ /* Unmask level 2 handler */
+ if (cpu_is_omap730()) {
+ omap_unmask_irq(INT_730_IH2_IRQ);
+ } else {
+ omap_unmask_irq(INT_IH2_IRQ);
+ }
+}
--- /dev/null
+/*
+ * linux/arch/arm/mach-omap1/time.c
+ *
+ * OMAP Timers
+ *
+ * Copyright (C) 2004 Nokia Corporation
+ * Partial timer rewrite and additional dynamic tick timer support by
+ * Tony Lindgen <tony@atomide.com> and
+ * Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
+ *
+ * MPU timer code based on the older MPU timer code for OMAP
+ * Copyright (C) 2000 RidgeRun, Inc.
+ * Author: Greg Lonnon <glonnon@ridgerun.com>
+ *
+ * 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 PROVIDED ``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.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+
+#include <asm/system.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/leds.h>
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/time.h>
+
+struct sys_timer omap_timer;
+
+#ifdef CONFIG_OMAP_MPU_TIMER
+
+/*
+ * ---------------------------------------------------------------------------
+ * MPU timer
+ * ---------------------------------------------------------------------------
+ */
+#define OMAP_MPU_TIMER_BASE OMAP_MPU_TIMER1_BASE
+#define OMAP_MPU_TIMER_OFFSET 0x100
+
+/* cycles to nsec conversions taken from arch/i386/kernel/timers/timer_tsc.c,
+ * converted to use kHz by Kevin Hilman */
+/* convert from cycles(64bits) => nanoseconds (64bits)
+ * basic equation:
+ * ns = cycles / (freq / ns_per_sec)
+ * ns = cycles * (ns_per_sec / freq)
+ * ns = cycles * (10^9 / (cpu_khz * 10^3))
+ * ns = cycles * (10^6 / cpu_khz)
+ *
+ * Then we use scaling math (suggested by george at mvista.com) to get:
+ * ns = cycles * (10^6 * SC / cpu_khz / SC
+ * ns = cycles * cyc2ns_scale / SC
+ *
+ * And since SC is a constant power of two, we can convert the div
+ * into a shift.
+ * -johnstul at us.ibm.com "math is hard, lets go shopping!"
+ */
+static unsigned long cyc2ns_scale;
+#define CYC2NS_SCALE_FACTOR 10 /* 2^10, carefully chosen */
+
+static inline void set_cyc2ns_scale(unsigned long cpu_khz)
+{
+ cyc2ns_scale = (1000000 << CYC2NS_SCALE_FACTOR)/cpu_khz;
+}
+
+static inline unsigned long long cycles_2_ns(unsigned long long cyc)
+{
+ return (cyc * cyc2ns_scale) >> CYC2NS_SCALE_FACTOR;
+}
+
+/*
+ * MPU_TICKS_PER_SEC must be an even number, otherwise machinecycles_to_usecs
+ * will break. On P2, the timer count rate is 6.5 MHz after programming PTV
+ * with 0. This divides the 13MHz input by 2, and is undocumented.
+ */
+#ifdef CONFIG_MACH_OMAP_PERSEUS2
+/* REVISIT: This ifdef construct should be replaced by a query to clock
+ * framework to see if timer base frequency is 12.0, 13.0 or 19.2 MHz.
+ */
+#define MPU_TICKS_PER_SEC (13000000 / 2)
+#else
+#define MPU_TICKS_PER_SEC (12000000 / 2)
+#endif
+
+#define MPU_TIMER_TICK_PERIOD ((MPU_TICKS_PER_SEC / HZ) - 1)
+
+typedef struct {
+ u32 cntl; /* CNTL_TIMER, R/W */
+ u32 load_tim; /* LOAD_TIM, W */
+ u32 read_tim; /* READ_TIM, R */
+} omap_mpu_timer_regs_t;
+
+#define omap_mpu_timer_base(n) \
+((volatile omap_mpu_timer_regs_t*)IO_ADDRESS(OMAP_MPU_TIMER_BASE + \
+ (n)*OMAP_MPU_TIMER_OFFSET))
+
+static inline unsigned long omap_mpu_timer_read(int nr)
+{
+ volatile omap_mpu_timer_regs_t* timer = omap_mpu_timer_base(nr);
+ return timer->read_tim;
+}
+
+static inline void omap_mpu_timer_start(int nr, unsigned long load_val)
+{
+ volatile omap_mpu_timer_regs_t* timer = omap_mpu_timer_base(nr);
+
+ timer->cntl = MPU_TIMER_CLOCK_ENABLE;
+ udelay(1);
+ timer->load_tim = load_val;
+ udelay(1);
+ timer->cntl = (MPU_TIMER_CLOCK_ENABLE | MPU_TIMER_AR | MPU_TIMER_ST);
+}
+
+unsigned long omap_mpu_timer_ticks_to_usecs(unsigned long nr_ticks)
+{
+ unsigned long long nsec;
+
+ nsec = cycles_2_ns((unsigned long long)nr_ticks);
+ return (unsigned long)nsec / 1000;
+}
+
+/*
+ * Last processed system timer interrupt
+ */
+static unsigned long omap_mpu_timer_last = 0;
+
+/*
+ * Returns elapsed usecs since last system timer interrupt
+ */
+static unsigned long omap_mpu_timer_gettimeoffset(void)
+{
+ unsigned long now = 0 - omap_mpu_timer_read(0);
+ unsigned long elapsed = now - omap_mpu_timer_last;
+
+ return omap_mpu_timer_ticks_to_usecs(elapsed);
+}
+
+/*
+ * Elapsed time between interrupts is calculated using timer0.
+ * Latency during the interrupt is calculated using timer1.
+ * Both timer0 and timer1 are counting at 6MHz (P2 6.5MHz).
+ */
+static irqreturn_t omap_mpu_timer_interrupt(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ unsigned long now, latency;
+
+ write_seqlock(&xtime_lock);
+ now = 0 - omap_mpu_timer_read(0);
+ latency = MPU_TICKS_PER_SEC / HZ - omap_mpu_timer_read(1);
+ omap_mpu_timer_last = now - latency;
+ timer_tick(regs);
+ write_sequnlock(&xtime_lock);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction omap_mpu_timer_irq = {
+ .name = "mpu timer",
+ .flags = SA_INTERRUPT | SA_TIMER,
+ .handler = omap_mpu_timer_interrupt,
+};
+
+static unsigned long omap_mpu_timer1_overflows;
+static irqreturn_t omap_mpu_timer1_interrupt(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ omap_mpu_timer1_overflows++;
+ return IRQ_HANDLED;
+}
+
+static struct irqaction omap_mpu_timer1_irq = {
+ .name = "mpu timer1 overflow",
+ .flags = SA_INTERRUPT,
+ .handler = omap_mpu_timer1_interrupt,
+};
+
+static __init void omap_init_mpu_timer(void)
+{
+ set_cyc2ns_scale(MPU_TICKS_PER_SEC / 1000);
+ omap_timer.offset = omap_mpu_timer_gettimeoffset;
+ setup_irq(INT_TIMER1, &omap_mpu_timer1_irq);
+ setup_irq(INT_TIMER2, &omap_mpu_timer_irq);
+ omap_mpu_timer_start(0, 0xffffffff);
+ omap_mpu_timer_start(1, MPU_TIMER_TICK_PERIOD);
+}
+
+/*
+ * Scheduler clock - returns current time in nanosec units.
+ */
+unsigned long long sched_clock(void)
+{
+ unsigned long ticks = 0 - omap_mpu_timer_read(0);
+ unsigned long long ticks64;
+
+ ticks64 = omap_mpu_timer1_overflows;
+ ticks64 <<= 32;
+ ticks64 |= ticks;
+
+ return cycles_2_ns(ticks64);
+}
+#endif /* CONFIG_OMAP_MPU_TIMER */
+
+#ifdef CONFIG_OMAP_32K_TIMER
+
+#ifdef CONFIG_ARCH_OMAP1510
+#error OMAP 32KHz timer does not currently work on 1510!
+#endif
+
+/*
+ * ---------------------------------------------------------------------------
+ * 32KHz OS timer
+ *
+ * This currently works only on 16xx, as 1510 does not have the continuous
+ * 32KHz synchronous timer. The 32KHz synchronous timer is used to keep track
+ * of time in addition to the 32KHz OS timer. Using only the 32KHz OS timer
+ * on 1510 would be possible, but the timer would not be as accurate as
+ * with the 32KHz synchronized timer.
+ * ---------------------------------------------------------------------------
+ */
+#define OMAP_32K_TIMER_BASE 0xfffb9000
+#define OMAP_32K_TIMER_CR 0x08
+#define OMAP_32K_TIMER_TVR 0x00
+#define OMAP_32K_TIMER_TCR 0x04
+
+#define OMAP_32K_TICKS_PER_HZ (32768 / HZ)
+#if (32768 % HZ) != 0
+/* We cannot ignore modulo.
+ * Potential error can be as high as several percent.
+ */
+#define OMAP_32K_TICK_MODULO (32768 % HZ)
+static unsigned modulo_count = 0; /* Counts 1/HZ units */
+#endif
+
+/*
+ * TRM says 1 / HZ = ( TVR + 1) / 32768, so TRV = (32768 / HZ) - 1
+ * so with HZ = 100, TVR = 327.68.
+ */
+#define OMAP_32K_TIMER_TICK_PERIOD ((32768 / HZ) - 1)
+#define TIMER_32K_SYNCHRONIZED 0xfffbc410
+
+#define JIFFIES_TO_HW_TICKS(nr_jiffies, clock_rate) \
+ (((nr_jiffies) * (clock_rate)) / HZ)
+
+static inline void omap_32k_timer_write(int val, int reg)
+{
+ omap_writew(val, reg + OMAP_32K_TIMER_BASE);
+}
+
+static inline unsigned long omap_32k_timer_read(int reg)
+{
+ return omap_readl(reg + OMAP_32K_TIMER_BASE) & 0xffffff;
+}
+
+/*
+ * The 32KHz synchronized timer is an additional timer on 16xx.
+ * It is always running.
+ */
+static inline unsigned long omap_32k_sync_timer_read(void)
+{
+ return omap_readl(TIMER_32K_SYNCHRONIZED);
+}
+
+static inline void omap_32k_timer_start(unsigned long load_val)
+{
+ omap_32k_timer_write(load_val, OMAP_32K_TIMER_TVR);
+ omap_32k_timer_write(0x0f, OMAP_32K_TIMER_CR);
+}
+
+static inline void omap_32k_timer_stop(void)
+{
+ omap_32k_timer_write(0x0, OMAP_32K_TIMER_CR);
+}
+
+/*
+ * Rounds down to nearest usec
+ */
+static inline unsigned long omap_32k_ticks_to_usecs(unsigned long ticks_32k)
+{
+ return (ticks_32k * 5*5*5*5*5*5) >> 9;
+}
+
+static unsigned long omap_32k_last_tick = 0;
+
+/*
+ * Returns elapsed usecs since last 32k timer interrupt
+ */
+static unsigned long omap_32k_timer_gettimeoffset(void)
+{
+ unsigned long now = omap_32k_sync_timer_read();
+ return omap_32k_ticks_to_usecs(now - omap_32k_last_tick);
+}
+
+/*
+ * Timer interrupt for 32KHz timer. When dynamic tick is enabled, this
+ * function is also called from other interrupts to remove latency
+ * issues with dynamic tick. In the dynamic tick case, we need to lock
+ * with irqsave.
+ */
+static irqreturn_t omap_32k_timer_interrupt(int irq, void *dev_id,
+ struct pt_regs *regs)
+{
+ unsigned long flags;
+ unsigned long now;
+
+ write_seqlock_irqsave(&xtime_lock, flags);
+ now = omap_32k_sync_timer_read();
+
+ while (now - omap_32k_last_tick >= OMAP_32K_TICKS_PER_HZ) {
+#ifdef OMAP_32K_TICK_MODULO
+ /* Modulo addition may put omap_32k_last_tick ahead of now
+ * and cause unwanted repetition of the while loop.
+ */
+ if (unlikely(now - omap_32k_last_tick == ~0))
+ break;
+
+ modulo_count += OMAP_32K_TICK_MODULO;
+ if (modulo_count > HZ) {
+ ++omap_32k_last_tick;
+ modulo_count -= HZ;
+ }
+#endif
+ omap_32k_last_tick += OMAP_32K_TICKS_PER_HZ;
+ timer_tick(regs);
+ }
+
+ /* Restart timer so we don't drift off due to modulo or dynamic tick.
+ * By default we program the next timer to be continuous to avoid
+ * latencies during high system load. During dynamic tick operation the
+ * continuous timer can be overridden from pm_idle to be longer.
+ */
+ omap_32k_timer_start(omap_32k_last_tick + OMAP_32K_TICKS_PER_HZ - now);
+ write_sequnlock_irqrestore(&xtime_lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_NO_IDLE_HZ
+/*
+ * Programs the next timer interrupt needed. Called when dynamic tick is
+ * enabled, and to reprogram the ticks to skip from pm_idle. Note that
+ * we can keep the timer continuous, and don't need to set it to run in
+ * one-shot mode. This is because the timer will get reprogrammed again
+ * after next interrupt.
+ */
+void omap_32k_timer_reprogram(unsigned long next_tick)
+{
+ omap_32k_timer_start(JIFFIES_TO_HW_TICKS(next_tick, 32768) + 1);
+}
+
+static struct irqaction omap_32k_timer_irq;
+extern struct timer_update_handler timer_update;
+
+static int omap_32k_timer_enable_dyn_tick(void)
+{
+ /* No need to reprogram timer, just use the next interrupt */
+ return 0;
+}
+
+static int omap_32k_timer_disable_dyn_tick(void)
+{
+ omap_32k_timer_start(OMAP_32K_TIMER_TICK_PERIOD);
+ return 0;
+}
+
+static struct dyn_tick_timer omap_dyn_tick_timer = {
+ .enable = omap_32k_timer_enable_dyn_tick,
+ .disable = omap_32k_timer_disable_dyn_tick,
+ .reprogram = omap_32k_timer_reprogram,
+ .handler = omap_32k_timer_interrupt,
+};
+#endif /* CONFIG_NO_IDLE_HZ */
+
+static struct irqaction omap_32k_timer_irq = {
+ .name = "32KHz timer",
+ .flags = SA_INTERRUPT | SA_TIMER,
+ .handler = omap_32k_timer_interrupt,
+};
+
+static __init void omap_init_32k_timer(void)
+{
+
+#ifdef CONFIG_NO_IDLE_HZ
+ omap_timer.dyn_tick = &omap_dyn_tick_timer;
+#endif
+
+ setup_irq(INT_OS_TIMER, &omap_32k_timer_irq);
+ omap_timer.offset = omap_32k_timer_gettimeoffset;
+ omap_32k_last_tick = omap_32k_sync_timer_read();
+ omap_32k_timer_start(OMAP_32K_TIMER_TICK_PERIOD);
+}
+#endif /* CONFIG_OMAP_32K_TIMER */
+
+/*
+ * ---------------------------------------------------------------------------
+ * Timer initialization
+ * ---------------------------------------------------------------------------
+ */
+static void __init omap_timer_init(void)
+{
+#if defined(CONFIG_OMAP_MPU_TIMER)
+ omap_init_mpu_timer();
+#elif defined(CONFIG_OMAP_32K_TIMER)
+ omap_init_32k_timer();
+#else
+#error No system timer selected in Kconfig!
+#endif
+}
+
+struct sys_timer omap_timer = {
+ .init = omap_timer_init,
+ .offset = NULL, /* Initialized later */
+};
projects / powerpc.git / commitdiff