diff options
Diffstat (limited to 'arch/arm/mach-realview/core.c')
| -rw-r--r-- | arch/arm/mach-realview/core.c | 194 |
1 files changed, 27 insertions, 167 deletions
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c index d5a95738f85b..595be19f8ad5 100644 --- a/arch/arm/mach-realview/core.c +++ b/arch/arm/mach-realview/core.c @@ -25,8 +25,6 @@ #include <linux/interrupt.h> #include <linux/amba/bus.h> #include <linux/amba/clcd.h> -#include <linux/clocksource.h> -#include <linux/clockchips.h> #include <linux/io.h> #include <linux/smsc911x.h> #include <linux/ata_platform.h> @@ -40,7 +38,7 @@ #include <asm/leds.h> #include <asm/mach-types.h> #include <asm/hardware/arm_timer.h> -#include <asm/hardware/icst307.h> +#include <asm/hardware/icst.h> #include <asm/mach/arch.h> #include <asm/mach/flash.h> @@ -49,13 +47,12 @@ #include <asm/hardware/gic.h> +#include <mach/clkdev.h> #include <mach/platform.h> #include <mach/irqs.h> +#include <plat/timer-sp.h> #include "core.h" -#include "clock.h" - -#define REALVIEW_REFCOUNTER (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_24MHz_OFFSET) /* used by entry-macro.S and platsmp.c */ void __iomem *gic_cpu_base_addr; @@ -79,20 +76,6 @@ void __init realview_adjust_zones(int node, unsigned long *size, } #endif -/* - * This is the RealView sched_clock implementation. This has - * a resolution of 41.7ns, and a maximum value of about 179s. - */ -unsigned long long sched_clock(void) -{ - unsigned long long v; - - v = (unsigned long long)readl(REALVIEW_REFCOUNTER) * 125; - do_div(v, 3); - - return v; -} - #define REALVIEW_FLASHCTRL (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET) @@ -274,37 +257,40 @@ struct mmci_platform_data realview_mmc1_plat_data = { /* * Clock handling */ -static const struct icst307_params realview_oscvco_params = { - .ref = 24000, - .vco_max = 200000, +static const struct icst_params realview_oscvco_params = { + .ref = 24000000, + .vco_max = ICST307_VCO_MAX, + .vco_min = ICST307_VCO_MIN, .vd_min = 4 + 8, .vd_max = 511 + 8, .rd_min = 1 + 2, .rd_max = 127 + 2, + .s2div = icst307_s2div, + .idx2s = icst307_idx2s, }; -static void realview_oscvco_set(struct clk *clk, struct icst307_vco vco) +static void realview_oscvco_set(struct clk *clk, struct icst_vco vco) { void __iomem *sys_lock = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LOCK_OFFSET; - void __iomem *sys_osc; u32 val; - if (machine_is_realview_pb1176()) - sys_osc = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC0_OFFSET; - else - sys_osc = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC4_OFFSET; - - val = readl(sys_osc) & ~0x7ffff; + val = readl(clk->vcoreg) & ~0x7ffff; val |= vco.v | (vco.r << 9) | (vco.s << 16); writel(0xa05f, sys_lock); - writel(val, sys_osc); + writel(val, clk->vcoreg); writel(0, sys_lock); } +static const struct clk_ops oscvco_clk_ops = { + .round = icst_clk_round, + .set = icst_clk_set, + .setvco = realview_oscvco_set, +}; + static struct clk oscvco_clk = { + .ops = &oscvco_clk_ops, .params = &realview_oscvco_params, - .setvco = realview_oscvco_set, }; /* @@ -347,7 +333,13 @@ static struct clk_lookup lookups[] = { static int __init clk_init(void) { + if (machine_is_realview_pb1176()) + oscvco_clk.vcoreg = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC0_OFFSET; + else + oscvco_clk.vcoreg = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC4_OFFSET; + clkdev_add_table(lookups, ARRAY_SIZE(lookups)); + return 0; } arch_initcall(clk_init); @@ -644,133 +636,6 @@ void __iomem *timer2_va_base; void __iomem *timer3_va_base; /* - * How long is the timer interval? - */ -#define TIMER_INTERVAL (TICKS_PER_uSEC * mSEC_10) -#if TIMER_INTERVAL >= 0x100000 -#define TIMER_RELOAD (TIMER_INTERVAL >> 8) -#define TIMER_DIVISOR (TIMER_CTRL_DIV256) -#define TICKS2USECS(x) (256 * (x) / TICKS_PER_uSEC) -#elif TIMER_INTERVAL >= 0x10000 -#define TIMER_RELOAD (TIMER_INTERVAL >> 4) /* Divide by 16 */ -#define TIMER_DIVISOR (TIMER_CTRL_DIV16) -#define TICKS2USECS(x) (16 * (x) / TICKS_PER_uSEC) -#else -#define TIMER_RELOAD (TIMER_INTERVAL) -#define TIMER_DIVISOR (TIMER_CTRL_DIV1) -#define TICKS2USECS(x) ((x) / TICKS_PER_uSEC) -#endif - -static void timer_set_mode(enum clock_event_mode mode, - struct clock_event_device *clk) -{ - unsigned long ctrl; - - switch(mode) { - case CLOCK_EVT_MODE_PERIODIC: - writel(TIMER_RELOAD, timer0_va_base + TIMER_LOAD); - - ctrl = TIMER_CTRL_PERIODIC; - ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE | TIMER_CTRL_ENABLE; - break; - case CLOCK_EVT_MODE_ONESHOT: - /* period set, and timer enabled in 'next_event' hook */ - ctrl = TIMER_CTRL_ONESHOT; - ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE; - break; - case CLOCK_EVT_MODE_UNUSED: - case CLOCK_EVT_MODE_SHUTDOWN: - default: - ctrl = 0; - } - - writel(ctrl, timer0_va_base + TIMER_CTRL); -} - -static int timer_set_next_event(unsigned long evt, - struct clock_event_device *unused) -{ - unsigned long ctrl = readl(timer0_va_base + TIMER_CTRL); - - writel(evt, timer0_va_base + TIMER_LOAD); - writel(ctrl | TIMER_CTRL_ENABLE, timer0_va_base + TIMER_CTRL); - - return 0; -} - -static struct clock_event_device timer0_clockevent = { - .name = "timer0", - .shift = 32, - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .set_mode = timer_set_mode, - .set_next_event = timer_set_next_event, - .rating = 300, - .cpumask = cpu_all_mask, -}; - -static void __init realview_clockevents_init(unsigned int timer_irq) -{ - timer0_clockevent.irq = timer_irq; - timer0_clockevent.mult = - div_sc(1000000, NSEC_PER_SEC, timer0_clockevent.shift); - timer0_clockevent.max_delta_ns = - clockevent_delta2ns(0xffffffff, &timer0_clockevent); - timer0_clockevent.min_delta_ns = - clockevent_delta2ns(0xf, &timer0_clockevent); - - clockevents_register_device(&timer0_clockevent); -} - -/* - * IRQ handler for the timer - */ -static irqreturn_t realview_timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = &timer0_clockevent; - - /* clear the interrupt */ - writel(1, timer0_va_base + TIMER_INTCLR); - - evt->event_handler(evt); - - return IRQ_HANDLED; -} - -static struct irqaction realview_timer_irq = { - .name = "RealView Timer Tick", - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, - .handler = realview_timer_interrupt, -}; - -static cycle_t realview_get_cycles(struct clocksource *cs) -{ - return ~readl(timer3_va_base + TIMER_VALUE); -} - -static struct clocksource clocksource_realview = { - .name = "timer3", - .rating = 200, - .read = realview_get_cycles, - .mask = CLOCKSOURCE_MASK(32), - .shift = 20, - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -static void __init realview_clocksource_init(void) -{ - /* setup timer 0 as free-running clocksource */ - writel(0, timer3_va_base + TIMER_CTRL); - writel(0xffffffff, timer3_va_base + TIMER_LOAD); - writel(0xffffffff, timer3_va_base + TIMER_VALUE); - writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, - timer3_va_base + TIMER_CTRL); - - clocksource_realview.mult = - clocksource_khz2mult(1000, clocksource_realview.shift); - clocksource_register(&clocksource_realview); -} - -/* * Set up the clock source and clock events devices */ void __init realview_timer_init(unsigned int timer_irq) @@ -797,13 +662,8 @@ void __init realview_timer_init(unsigned int timer_irq) writel(0, timer2_va_base + TIMER_CTRL); writel(0, timer3_va_base + TIMER_CTRL); - /* - * Make irqs happen for the system timer - */ - setup_irq(timer_irq, &realview_timer_irq); - - realview_clocksource_init(); - realview_clockevents_init(timer_irq); + sp804_clocksource_init(timer3_va_base); + sp804_clockevents_init(timer0_va_base, timer_irq); } /* |