arm: tegra: timer: New Tegra3 IRQ mapping

Rename timer.c to timer-t2.c for consistency with other
chip-specific implementations.

Bug 790458
Bug 790448
Bug 738259

Original-Change-Id: I7e0fceb716590cd92b64ba00c0bebe659e9beb21
Reviewed-on: http://git-master/r/22885
Tested-by: Scott Williams <scwilliams@nvidia.com>
Reviewed-by: Aleksandr Frid <afrid@nvidia.com>
Reviewed-by: Scott Williams <scwilliams@nvidia.com>
Original-Change-Id: I322324c2177d57657a63e9428f8e49d5df2b828e

Rebase-Id: R7312866cdc8044a71cc2f83ad4bc7aa66b07416d

1 files changed, 0 insertions, 296 deletions

diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c
deleted file mode 100644
index 36ef3fd89bf3..000000000000
--- a/arch/arm/mach-tegra/timer.c
+++ /dev/null
@@ -1,296 +0,0 @@
-/*
- * arch/arch/mach-tegra/timer.c
- *
- * Copyright (C) 2010 Google, Inc.
- *
- * Author:
- *	Colin Cross <ccross@google.com>
- *
- * 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/err.h>
-#include <linux/sched.h>
-#include <linux/time.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/clockchips.h>
-#include <linux/clocksource.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/syscore_ops.h>
-
-#include <asm/mach/time.h>
-#include <asm/localtimer.h>
-#include <asm/sched_clock.h>
-
-#include <mach/iomap.h>
-#include <mach/irqs.h>
-
-#include "board.h"
-#include "clock.h"
-
-#define RTC_SECONDS            0x08
-#define RTC_SHADOW_SECONDS     0x0c
-#define RTC_MILLISECONDS       0x10
-
-#define TIMERUS_CNTR_1US 0x10
-#define TIMERUS_USEC_CFG 0x14
-#define TIMERUS_CNTR_FREEZE 0x4c
-
-#define TIMER1_BASE 0x0
-#define TIMER2_BASE 0x8
-#define TIMER3_BASE 0x50
-#define TIMER4_BASE 0x58
-
-#define TIMER_PTV 0x0
-#define TIMER_PCR 0x4
-
-static void __iomem *timer_reg_base = IO_ADDRESS(TEGRA_TMR1_BASE);
-static void __iomem *rtc_base = IO_ADDRESS(TEGRA_RTC_BASE);
-
-static struct timespec persistent_ts;
-static u64 persistent_ms, last_persistent_ms;
-static u32 usec_offset;
-static bool usec_suspended;
-
-#define timer_writel(value, reg) \
-	__raw_writel(value, (u32)timer_reg_base + (reg))
-#define timer_readl(reg) \
-	__raw_readl((u32)timer_reg_base + (reg))
-
-static int tegra_timer_set_next_event(unsigned long cycles,
-					 struct clock_event_device *evt)
-{
-	u32 reg;
-
-	reg = 0x80000000 | ((cycles > 1) ? (cycles-1) : 0);
-	timer_writel(reg, TIMER3_BASE + TIMER_PTV);
-
-	return 0;
-}
-
-static void tegra_timer_set_mode(enum clock_event_mode mode,
-				    struct clock_event_device *evt)
-{
-	u32 reg;
-
-	timer_writel(0, TIMER3_BASE + TIMER_PTV);
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		reg = 0xC0000000 | ((1000000/HZ)-1);
-		timer_writel(reg, TIMER3_BASE + TIMER_PTV);
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-		break;
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	case CLOCK_EVT_MODE_RESUME:
-		break;
-	}
-}
-
-static struct clock_event_device tegra_clockevent = {
-	.name		= "timer0",
-	.rating		= 300,
-	.features	= CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
-	.set_next_event	= tegra_timer_set_next_event,
-	.set_mode	= tegra_timer_set_mode,
-};
-
-static DEFINE_CLOCK_DATA(cd);
-
-/*
- * Constants generated by clocks_calc_mult_shift(m, s, 1MHz, NSEC_PER_SEC, 60).
- * This gives a resolution of about 1us and a wrap period of about 1h11min.
- */
-#define SC_MULT		4194304000u
-#define SC_SHIFT	22
-
-static u32 notrace tegra_read_usec(void)
-{
-	u32 cyc = usec_offset;
-	if (!usec_suspended)
-		cyc += timer_readl(TIMERUS_CNTR_1US);
-	return cyc;
-}
-
-unsigned long long notrace sched_clock(void)
-{
-	u32 cyc = tegra_read_usec();
-	return cyc_to_fixed_sched_clock(&cd, cyc, (u32)~0, SC_MULT, SC_SHIFT);
-}
-
-static void notrace tegra_update_sched_clock(void)
-{
-	u32 cyc = tegra_read_usec();
-	update_sched_clock(&cd, cyc, (u32)~0);
-}
-
-/*
- * tegra_rtc_read - Reads the Tegra RTC registers
- * Care must be taken that this funciton is not called while the
- * tegra_rtc driver could be executing to avoid race conditions
- * on the RTC shadow register
- */
-u64 tegra_rtc_read_ms(void)
-{
-	u32 ms = readl(rtc_base + RTC_MILLISECONDS);
-	u32 s = readl(rtc_base + RTC_SHADOW_SECONDS);
-	return (u64)s * MSEC_PER_SEC + ms;
-}
-
-/*
- * read_persistent_clock -  Return time from a persistent clock.
- *
- * Reads the time from a source which isn't disabled during PM, the
- * 32k sync timer.  Convert the cycles elapsed since last read into
- * nsecs and adds to a monotonically increasing timespec.
- * Care must be taken that this funciton is not called while the
- * tegra_rtc driver could be executing to avoid race conditions
- * on the RTC shadow register
- */
-void read_persistent_clock(struct timespec *ts)
-{
-	u64 delta;
-	struct timespec *tsp = &persistent_ts;
-
-	last_persistent_ms = persistent_ms;
-	persistent_ms = tegra_rtc_read_ms();
-	delta = persistent_ms - last_persistent_ms;
-
-	timespec_add_ns(tsp, delta * NSEC_PER_MSEC);
-	*ts = *tsp;
-}
-
-static irqreturn_t tegra_timer_interrupt(int irq, void *dev_id)
-{
-	struct clock_event_device *evt = (struct clock_event_device *)dev_id;
-	timer_writel(1<<30, TIMER3_BASE + TIMER_PCR);
-	evt->event_handler(evt);
-	return IRQ_HANDLED;
-}
-
-static struct irqaction tegra_timer_irq = {
-	.name		= "timer0",
-	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_TRIGGER_HIGH,
-	.handler	= tegra_timer_interrupt,
-	.dev_id		= &tegra_clockevent,
-	.irq		= INT_TMR3,
-};
-
-static u32 usec_config;
-
-static int tegra_timer_suspend(void)
-{
-	usec_config = timer_readl(TIMERUS_USEC_CFG);
-
-	usec_offset += timer_readl(TIMERUS_CNTR_1US);
-	usec_suspended = true;
-
-	return 0;
-}
-
-static void tegra_timer_resume(void)
-{
-	timer_writel(usec_config, TIMERUS_USEC_CFG);
-
-	usec_offset -= timer_readl(TIMERUS_CNTR_1US);
-	usec_suspended = false;
-}
-
-static struct syscore_ops tegra_timer_syscore_ops = {
-	.suspend = tegra_timer_suspend,
-	.resume = tegra_timer_resume,
-};
-
-static void __init tegra_init_timer(void)
-{
-	struct clk *clk;
-	unsigned long rate = clk_measure_input_freq();
-	int ret;
-
-	clk = clk_get_sys("timer", NULL);
-	BUG_ON(IS_ERR(clk));
-	clk_enable(clk);
-
-	/*
-	 * rtc registers are used by read_persistent_clock, keep the rtc clock
-	 * enabled
-	 */
-	clk = clk_get_sys("rtc-tegra", NULL);
-	BUG_ON(IS_ERR(clk));
-	clk_enable(clk);
-
-#ifdef CONFIG_HAVE_ARM_TWD
-	twd_base = IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x600);
-#endif
-
-	switch (rate) {
-	case 12000000:
-		timer_writel(0x000b, TIMERUS_USEC_CFG);
-		break;
-	case 13000000:
-		timer_writel(0x000c, TIMERUS_USEC_CFG);
-		break;
-	case 19200000:
-		timer_writel(0x045f, TIMERUS_USEC_CFG);
-		break;
-	case 26000000:
-		timer_writel(0x0019, TIMERUS_USEC_CFG);
-		break;
-#ifndef CONFIG_ARCH_TEGRA_2x_SOC
-	case 16800000:
-		timer_writel(0x0453, TIMERUS_USEC_CFG);
-		break;
-	case 38400000:
-		timer_writel(0x04BF, TIMERUS_USEC_CFG);
-		break;
-	case 48000000:
-		timer_writel(0x002F, TIMERUS_USEC_CFG);
-		break;
-#endif
-	default:
-		WARN(1, "Unknown clock rate");
-	}
-
-	init_fixed_sched_clock(&cd, tegra_update_sched_clock, 32,
-			       1000000, SC_MULT, SC_SHIFT);
-
-	if (clocksource_mmio_init(timer_reg_base + TIMERUS_CNTR_1US,
-		"timer_us", 1000000, 300, 32, clocksource_mmio_readl_up)) {
-		printk(KERN_ERR "Failed to register clocksource\n");
-		BUG();
-	}
-
-	ret = setup_irq(tegra_timer_irq.irq, &tegra_timer_irq);
-	if (ret) {
-		printk(KERN_ERR "Failed to register timer IRQ: %d\n", ret);
-		BUG();
-	}
-
-	clockevents_calc_mult_shift(&tegra_clockevent, 1000000, 5);
-	tegra_clockevent.max_delta_ns =
-		clockevent_delta2ns(0x1fffffff, &tegra_clockevent);
-	tegra_clockevent.min_delta_ns =
-		clockevent_delta2ns(0x1, &tegra_clockevent);
-	tegra_clockevent.cpumask = cpu_all_mask;
-	tegra_clockevent.irq = tegra_timer_irq.irq;
-	clockevents_register_device(&tegra_clockevent);
-
-	register_syscore_ops(&tegra_timer_syscore_ops);
-}
-
-struct sys_timer tegra_timer = {
-	.init = tegra_init_timer,
-};