From f19900b2e608b604777a74d6d711bbf744657756 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Tue, 12 May 2009 10:25:54 +0000 Subject: sh: remove old TMU driver This patch removes the old TMU driver (CONFIG_SH_TMU/timer-tmu.c) As replacement, select the sh_tmu driver with CONFIG_SH_TIMER_TMU and configure timer channel using platform data. If multiple TMU channels are enabled using platform data, use the earlytimer parameter on the kernel command line to select channel. For instance, use "earlytimer=sh_tmu.0" to select the first channel. To verify which timer is being used, look at printouts or the timer irq count in /proc/interrupts. Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt --- arch/sh/kernel/timers/timer-tmu.c | 297 -------------------------------------- 1 file changed, 297 deletions(-) delete mode 100644 arch/sh/kernel/timers/timer-tmu.c (limited to 'arch/sh/kernel/timers/timer-tmu.c') diff --git a/arch/sh/kernel/timers/timer-tmu.c b/arch/sh/kernel/timers/timer-tmu.c deleted file mode 100644 index fe8d8930ccb..00000000000 --- a/arch/sh/kernel/timers/timer-tmu.c +++ /dev/null @@ -1,297 +0,0 @@ -/* - * arch/sh/kernel/timers/timer-tmu.c - TMU Timer Support - * - * Copyright (C) 2005 - 2007 Paul Mundt - * - * TMU handling code hacked out of arch/sh/kernel/time.c - * - * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka - * Copyright (C) 2000 Philipp Rumpf - * Copyright (C) 2002, 2003, 2004 Paul Mundt - * Copyright (C) 2002 M. R. Brown - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define TMU_TOCR_INIT 0x00 -#define TMU_TCR_INIT 0x0020 - -#define TMU0 (0) -#define TMU1 (1) - -static inline void _tmu_start(int tmu_num) -{ - ctrl_outb(ctrl_inb(TMU_012_TSTR) | (0x1<mode == CLOCK_EVT_MODE_PERIODIC); - _tmu_set_irq(TMU0,1); - return 0; -} - -static void tmu_set_mode(enum clock_event_mode mode, - struct clock_event_device *evt) -{ - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - ctrl_outl(tmu_latest_interval[TMU0], TMU0_TCOR); - break; - case CLOCK_EVT_MODE_ONESHOT: - ctrl_outl(0, TMU0_TCOR); - break; - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_RESUME: - break; - } -} - -static struct clock_event_device tmu0_clockevent = { - .name = "tmu0", - .shift = 32, - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .set_mode = tmu_set_mode, - .set_next_event = tmu_set_next_event, -}; - -static irqreturn_t tmu_timer_interrupt(int irq, void *dummy) -{ - struct clock_event_device *evt = &tmu0_clockevent; - _tmu_clear_status(TMU0); - _tmu_set_irq(TMU0,tmu0_clockevent.mode != CLOCK_EVT_MODE_ONESHOT); - - switch (tmu0_clockevent.mode) { - case CLOCK_EVT_MODE_ONESHOT: - case CLOCK_EVT_MODE_PERIODIC: - evt->event_handler(evt); - break; - default: - break; - } - - return IRQ_HANDLED; -} - -static struct irqaction tmu0_irq = { - .name = "periodic/oneshot timer", - .handler = tmu_timer_interrupt, - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, -}; - -static void __init tmu_clk_init(struct clk *clk) -{ - u8 divisor = TMU_TCR_INIT & 0x7; - int tmu_num = clk->name[3]-'0'; - ctrl_outw(TMU_TCR_INIT, TMU0_TCR+(tmu_num*0xC)); - clk->rate = clk_get_rate(clk->parent) / (4 << (divisor << 1)); -} - -static void tmu_clk_recalc(struct clk *clk) -{ - int tmu_num = clk->name[3]-'0'; - unsigned long prev_rate = clk_get_rate(clk); - unsigned long flags; - u8 divisor = ctrl_inw(TMU0_TCR+tmu_num*0xC) & 0x7; - clk->rate = clk_get_rate(clk->parent) / (4 << (divisor << 1)); - - if(prev_rate==clk_get_rate(clk)) - return; - - if(tmu_num) - return; /* No more work on TMU1 */ - - local_irq_save(flags); - tmus_are_scaled = (prev_rate > clk->rate); - - _tmu_stop(TMU0); - - tmu0_clockevent.mult = div_sc(clk->rate, NSEC_PER_SEC, - tmu0_clockevent.shift); - tmu0_clockevent.max_delta_ns = - clockevent_delta2ns(-1, &tmu0_clockevent); - tmu0_clockevent.min_delta_ns = - clockevent_delta2ns(1, &tmu0_clockevent); - - if (tmus_are_scaled) - tmu_latest_interval[TMU0] >>= 1; - else - tmu_latest_interval[TMU0] <<= 1; - - tmu_timer_set_interval(TMU0, - tmu_latest_interval[TMU0], - tmu0_clockevent.mode == CLOCK_EVT_MODE_PERIODIC); - - _tmu_start(TMU0); - - local_irq_restore(flags); -} - -static struct clk_ops tmu_clk_ops = { - .init = tmu_clk_init, - .recalc = tmu_clk_recalc, -}; - -static struct clk tmu0_clk = { - .name = "tmu0_clk", - .ops = &tmu_clk_ops, -}; - -static struct clk tmu1_clk = { - .name = "tmu1_clk", - .ops = &tmu_clk_ops, -}; - -static int tmu_timer_init(void) -{ - unsigned long interval; - unsigned long frequency; - - setup_irq(CONFIG_SH_TIMER_IRQ, &tmu0_irq); - - tmu0_clk.parent = clk_get(NULL, "module_clk"); - tmu1_clk.parent = clk_get(NULL, "module_clk"); - - tmu_timer_stop(); - -#if !defined(CONFIG_CPU_SUBTYPE_SH7720) && \ - !defined(CONFIG_CPU_SUBTYPE_SH7721) && \ - !defined(CONFIG_CPU_SUBTYPE_SH7760) && \ - !defined(CONFIG_CPU_SUBTYPE_SH7785) && \ - !defined(CONFIG_CPU_SUBTYPE_SH7786) && \ - !defined(CONFIG_CPU_SUBTYPE_SHX3) - ctrl_outb(TMU_TOCR_INIT, TMU_TOCR); -#endif - - clk_register(&tmu0_clk); - clk_register(&tmu1_clk); - clk_enable(&tmu0_clk); - clk_enable(&tmu1_clk); - - frequency = clk_get_rate(&tmu0_clk); - interval = (frequency + HZ / 2) / HZ; - - tmu_timer_set_interval(TMU0,interval, 1); - tmu_timer_set_interval(TMU1,~0,1); - - _tmu_start(TMU1); - - clocksource_sh.rating = 200; - clocksource_sh.mask = CLOCKSOURCE_MASK(32); - clocksource_sh.read = tmu_timer_read; - clocksource_sh.shift = 10; - clocksource_sh.mult = clocksource_hz2mult(clk_get_rate(&tmu1_clk), - clocksource_sh.shift); - clocksource_sh.flags = CLOCK_SOURCE_IS_CONTINUOUS; - clocksource_register(&clocksource_sh); - - tmu0_clockevent.mult = div_sc(frequency, NSEC_PER_SEC, - tmu0_clockevent.shift); - tmu0_clockevent.max_delta_ns = - clockevent_delta2ns(-1, &tmu0_clockevent); - tmu0_clockevent.min_delta_ns = - clockevent_delta2ns(1, &tmu0_clockevent); - - tmu0_clockevent.cpumask = cpumask_of(0); - tmu0_clockevent.rating = 100; - - clockevents_register_device(&tmu0_clockevent); - - return 0; -} - -static struct sys_timer_ops tmu_timer_ops = { - .init = tmu_timer_init, - .start = tmu_timer_start, - .stop = tmu_timer_stop, -}; - -struct sys_timer tmu_timer = { - .name = "tmu", - .ops = &tmu_timer_ops, -}; -- cgit v1.2.3-70-g09d2