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Diffstat (limited to 'arch/arm/mach-msm/timer.c')
-rw-r--r--arch/arm/mach-msm/timer.c225
1 files changed, 0 insertions, 225 deletions
diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c
deleted file mode 100644
index 950100f19d0..00000000000
--- a/arch/arm/mach-msm/timer.c
+++ /dev/null
@@ -1,225 +0,0 @@
-/* linux/arch/arm/mach-msm/timer.c
- *
- * Copyright (C) 2007 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#include <linux/init.h>
-#include <linux/time.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/clk.h>
-#include <linux/clockchips.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-
-#include <asm/mach/time.h>
-#include <mach/msm_iomap.h>
-
-#ifndef MSM_DGT_BASE
-#define MSM_DGT_BASE (MSM_GPT_BASE + 0x10)
-#endif
-
-#define TIMER_MATCH_VAL 0x0000
-#define TIMER_COUNT_VAL 0x0004
-#define TIMER_ENABLE 0x0008
-#define TIMER_ENABLE_CLR_ON_MATCH_EN 2
-#define TIMER_ENABLE_EN 1
-#define TIMER_CLEAR 0x000C
-#define DGT_CLK_CTL 0x0034
-enum {
- DGT_CLK_CTL_DIV_1 = 0,
- DGT_CLK_CTL_DIV_2 = 1,
- DGT_CLK_CTL_DIV_3 = 2,
- DGT_CLK_CTL_DIV_4 = 3,
-};
-#define CSR_PROTECTION 0x0020
-#define CSR_PROTECTION_EN 1
-
-#define GPT_HZ 32768
-
-#if defined(CONFIG_ARCH_QSD8X50)
-#define DGT_HZ (19200000 / 4) /* 19.2 MHz / 4 by default */
-#define MSM_DGT_SHIFT (0)
-#elif defined(CONFIG_ARCH_MSM7X30) || defined(CONFIG_ARCH_MSM8X60)
-#define DGT_HZ (24576000 / 4) /* 24.576 MHz (LPXO) / 4 by default */
-#define MSM_DGT_SHIFT (0)
-#else
-#define DGT_HZ 19200000 /* 19.2 MHz or 600 KHz after shift */
-#define MSM_DGT_SHIFT (5)
-#endif
-
-struct msm_clock {
- struct clock_event_device clockevent;
- struct clocksource clocksource;
- struct irqaction irq;
- void __iomem *regbase;
- uint32_t freq;
- uint32_t shift;
-};
-
-static irqreturn_t msm_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = dev_id;
- evt->event_handler(evt);
- return IRQ_HANDLED;
-}
-
-static cycle_t msm_gpt_read(struct clocksource *cs)
-{
- return readl(MSM_GPT_BASE + TIMER_COUNT_VAL);
-}
-
-static cycle_t msm_dgt_read(struct clocksource *cs)
-{
- return readl(MSM_DGT_BASE + TIMER_COUNT_VAL) >> MSM_DGT_SHIFT;
-}
-
-static int msm_timer_set_next_event(unsigned long cycles,
- struct clock_event_device *evt)
-{
- struct msm_clock *clock = container_of(evt, struct msm_clock, clockevent);
- uint32_t now = readl(clock->regbase + TIMER_COUNT_VAL);
- uint32_t alarm = now + (cycles << clock->shift);
- int late;
-
- writel(alarm, clock->regbase + TIMER_MATCH_VAL);
- now = readl(clock->regbase + TIMER_COUNT_VAL);
- late = now - alarm;
- if (late >= (-2 << clock->shift) && late < DGT_HZ*5) {
- printk(KERN_NOTICE "msm_timer_set_next_event(%lu) clock %s, "
- "alarm already expired, now %x, alarm %x, late %d\n",
- cycles, clock->clockevent.name, now, alarm, late);
- return -ETIME;
- }
- return 0;
-}
-
-static void msm_timer_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- struct msm_clock *clock = container_of(evt, struct msm_clock, clockevent);
- switch (mode) {
- case CLOCK_EVT_MODE_RESUME:
- case CLOCK_EVT_MODE_PERIODIC:
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- writel(TIMER_ENABLE_EN, clock->regbase + TIMER_ENABLE);
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- writel(0, clock->regbase + TIMER_ENABLE);
- break;
- }
-}
-
-static struct msm_clock msm_clocks[] = {
- {
- .clockevent = {
- .name = "gp_timer",
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .shift = 32,
- .rating = 200,
- .set_next_event = msm_timer_set_next_event,
- .set_mode = msm_timer_set_mode,
- },
- .clocksource = {
- .name = "gp_timer",
- .rating = 200,
- .read = msm_gpt_read,
- .mask = CLOCKSOURCE_MASK(32),
- .shift = 17,
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
- },
- .irq = {
- .name = "gp_timer",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_TRIGGER_RISING,
- .handler = msm_timer_interrupt,
- .dev_id = &msm_clocks[0].clockevent,
- .irq = INT_GP_TIMER_EXP
- },
- .regbase = MSM_GPT_BASE,
- .freq = GPT_HZ
- },
- {
- .clockevent = {
- .name = "dg_timer",
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .shift = 32 + MSM_DGT_SHIFT,
- .rating = 300,
- .set_next_event = msm_timer_set_next_event,
- .set_mode = msm_timer_set_mode,
- },
- .clocksource = {
- .name = "dg_timer",
- .rating = 300,
- .read = msm_dgt_read,
- .mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT)),
- .shift = 24 - MSM_DGT_SHIFT,
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
- },
- .irq = {
- .name = "dg_timer",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_TRIGGER_RISING,
- .handler = msm_timer_interrupt,
- .dev_id = &msm_clocks[1].clockevent,
- .irq = INT_DEBUG_TIMER_EXP
- },
- .regbase = MSM_DGT_BASE,
- .freq = DGT_HZ >> MSM_DGT_SHIFT,
- .shift = MSM_DGT_SHIFT
- }
-};
-
-static void __init msm_timer_init(void)
-{
- int i;
- int res;
-
-#ifdef CONFIG_ARCH_MSM8X60
- writel(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL);
-#endif
-
- for (i = 0; i < ARRAY_SIZE(msm_clocks); i++) {
- struct msm_clock *clock = &msm_clocks[i];
- struct clock_event_device *ce = &clock->clockevent;
- struct clocksource *cs = &clock->clocksource;
- writel(0, clock->regbase + TIMER_ENABLE);
- writel(0, clock->regbase + TIMER_CLEAR);
- writel(~0, clock->regbase + TIMER_MATCH_VAL);
-
- ce->mult = div_sc(clock->freq, NSEC_PER_SEC, ce->shift);
- /* allow at least 10 seconds to notice that the timer wrapped */
- ce->max_delta_ns =
- clockevent_delta2ns(0xf0000000 >> clock->shift, ce);
- /* 4 gets rounded down to 3 */
- ce->min_delta_ns = clockevent_delta2ns(4, ce);
- ce->cpumask = cpumask_of(0);
-
- cs->mult = clocksource_hz2mult(clock->freq, cs->shift);
- res = clocksource_register(cs);
- if (res)
- printk(KERN_ERR "msm_timer_init: clocksource_register "
- "failed for %s\n", cs->name);
-
- res = setup_irq(clock->irq.irq, &clock->irq);
- if (res)
- printk(KERN_ERR "msm_timer_init: setup_irq "
- "failed for %s\n", cs->name);
-
- clockevents_register_device(ce);
- }
-}
-
-struct sys_timer msm_timer = {
- .init = msm_timer_init
-};
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