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Diffstat (limited to 'arch/arm/mach-bcmring/core.c')
-rw-r--r--arch/arm/mach-bcmring/core.c227
1 files changed, 54 insertions, 173 deletions
diff --git a/arch/arm/mach-bcmring/core.c b/arch/arm/mach-bcmring/core.c
index 8fc2035759f..43eadbcc29e 100644
--- a/arch/arm/mach-bcmring/core.c
+++ b/arch/arm/mach-bcmring/core.c
@@ -28,8 +28,6 @@
#include <linux/sysdev.h>
#include <linux/interrupt.h>
#include <linux/amba/bus.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
#include <linux/clkdev.h>
#include <mach/csp/mm_addr.h>
@@ -37,6 +35,7 @@
#include <linux/io.h>
#include <asm/irq.h>
#include <asm/hardware/arm_timer.h>
+#include <asm/hardware/timer-sp.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -97,6 +96,35 @@ static struct clk dummy_apb_pclk = {
.mode = CLK_MODE_XTAL,
};
+/* Timer 0 - 25 MHz, Timer3 at bus clock rate, typically 150-166 MHz */
+#if defined(CONFIG_ARCH_FPGA11107)
+/* fpga cpu/bus are currently 30 times slower so scale frequency as well to */
+/* slow down Linux's sense of time */
+#define TIMER0_FREQUENCY_MHZ (tmrHw_LOW_FREQUENCY_MHZ * 30)
+#define TIMER1_FREQUENCY_MHZ (tmrHw_LOW_FREQUENCY_MHZ * 30)
+#define TIMER3_FREQUENCY_MHZ (tmrHw_HIGH_FREQUENCY_MHZ * 30)
+#define TIMER3_FREQUENCY_KHZ (tmrHw_HIGH_FREQUENCY_HZ / 1000 * 30)
+#else
+#define TIMER0_FREQUENCY_MHZ tmrHw_LOW_FREQUENCY_MHZ
+#define TIMER1_FREQUENCY_MHZ tmrHw_LOW_FREQUENCY_MHZ
+#define TIMER3_FREQUENCY_MHZ tmrHw_HIGH_FREQUENCY_MHZ
+#define TIMER3_FREQUENCY_KHZ (tmrHw_HIGH_FREQUENCY_HZ / 1000)
+#endif
+
+static struct clk sp804_timer012_clk = {
+ .name = "sp804-timer-0,1,2",
+ .type = CLK_TYPE_PRIMARY,
+ .mode = CLK_MODE_XTAL,
+ .rate_hz = TIMER1_FREQUENCY_MHZ * 1000000,
+};
+
+static struct clk sp804_timer3_clk = {
+ .name = "sp804-timer-3",
+ .type = CLK_TYPE_PRIMARY,
+ .mode = CLK_MODE_XTAL,
+ .rate_hz = TIMER3_FREQUENCY_KHZ * 1000,
+};
+
static struct clk_lookup lookups[] = {
{ /* Bus clock */
.con_id = "apb_pclk",
@@ -107,6 +135,18 @@ static struct clk_lookup lookups[] = {
}, { /* UART1 */
.dev_id = "uartb",
.clk = &uart_clk,
+ }, { /* SP804 timer 0 */
+ .dev_id = "sp804",
+ .con_id = "timer0",
+ .clk = &sp804_timer012_clk,
+ }, { /* SP804 timer 1 */
+ .dev_id = "sp804",
+ .con_id = "timer1",
+ .clk = &sp804_timer012_clk,
+ }, { /* SP804 timer 3 */
+ .dev_id = "sp804",
+ .con_id = "timer3",
+ .clk = &sp804_timer3_clk,
}
};
@@ -151,8 +191,6 @@ void __init bcmring_amba_init(void)
chipcHw_busInterfaceClockEnable(bus_clock);
- clkdev_add_table(lookups, ARRAY_SIZE(lookups));
-
for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
struct amba_device *d = amba_devs[i];
amba_device_register(d, &iomem_resource);
@@ -162,170 +200,18 @@ void __init bcmring_amba_init(void)
/*
* Where is the timer (VA)?
*/
-#define TIMER0_VA_BASE MM_IO_BASE_TMR
-#define TIMER1_VA_BASE (MM_IO_BASE_TMR + 0x20)
-#define TIMER2_VA_BASE (MM_IO_BASE_TMR + 0x40)
-#define TIMER3_VA_BASE (MM_IO_BASE_TMR + 0x60)
-
-/* Timer 0 - 25 MHz, Timer3 at bus clock rate, typically 150-166 MHz */
-#if defined(CONFIG_ARCH_FPGA11107)
-/* fpga cpu/bus are currently 30 times slower so scale frequency as well to */
-/* slow down Linux's sense of time */
-#define TIMER0_FREQUENCY_MHZ (tmrHw_LOW_FREQUENCY_MHZ * 30)
-#define TIMER1_FREQUENCY_MHZ (tmrHw_LOW_FREQUENCY_MHZ * 30)
-#define TIMER3_FREQUENCY_MHZ (tmrHw_HIGH_FREQUENCY_MHZ * 30)
-#define TIMER3_FREQUENCY_KHZ (tmrHw_HIGH_FREQUENCY_HZ / 1000 * 30)
-#else
-#define TIMER0_FREQUENCY_MHZ tmrHw_LOW_FREQUENCY_MHZ
-#define TIMER1_FREQUENCY_MHZ tmrHw_LOW_FREQUENCY_MHZ
-#define TIMER3_FREQUENCY_MHZ tmrHw_HIGH_FREQUENCY_MHZ
-#define TIMER3_FREQUENCY_KHZ (tmrHw_HIGH_FREQUENCY_HZ / 1000)
-#endif
-
-#define TICKS_PER_uSEC TIMER0_FREQUENCY_MHZ
-
-/*
- * These are useconds NOT ticks.
- *
- */
-#define mSEC_1 1000
-#define mSEC_5 (mSEC_1 * 5)
-#define mSEC_10 (mSEC_1 * 10)
-#define mSEC_25 (mSEC_1 * 25)
-#define SEC_1 (mSEC_1 * 1000)
-
-/*
- * 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_DIVISOR | 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_DIVISOR | 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,
-};
-
-/*
- * IRQ handler for the timer
- */
-static irqreturn_t bcmring_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = &timer0_clockevent;
-
- writel(1, TIMER0_VA_BASE + TIMER_INTCLR);
-
- evt->event_handler(evt);
-
- return IRQ_HANDLED;
-}
-
-static struct irqaction bcmring_timer_irq = {
- .name = "bcmring Timer Tick",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
- .handler = bcmring_timer_interrupt,
-};
-
-static cycle_t bcmring_get_cycles_timer1(struct clocksource *cs)
-{
- return ~readl(TIMER1_VA_BASE + TIMER_VALUE);
-}
-
-static cycle_t bcmring_get_cycles_timer3(struct clocksource *cs)
-{
- return ~readl(TIMER3_VA_BASE + TIMER_VALUE);
-}
-
-static struct clocksource clocksource_bcmring_timer1 = {
- .name = "timer1",
- .rating = 200,
- .read = bcmring_get_cycles_timer1,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static struct clocksource clocksource_bcmring_timer3 = {
- .name = "timer3",
- .rating = 100,
- .read = bcmring_get_cycles_timer3,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
+#define TIMER0_VA_BASE ((void __iomem *)MM_IO_BASE_TMR)
+#define TIMER1_VA_BASE ((void __iomem *)(MM_IO_BASE_TMR + 0x20))
+#define TIMER2_VA_BASE ((void __iomem *)(MM_IO_BASE_TMR + 0x40))
+#define TIMER3_VA_BASE ((void __iomem *)(MM_IO_BASE_TMR + 0x60))
static int __init bcmring_clocksource_init(void)
{
/* setup timer1 as free-running clocksource */
- writel(0, TIMER1_VA_BASE + TIMER_CTRL);
- writel(0xffffffff, TIMER1_VA_BASE + TIMER_LOAD);
- writel(0xffffffff, TIMER1_VA_BASE + TIMER_VALUE);
- writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC,
- TIMER1_VA_BASE + TIMER_CTRL);
-
- clocksource_register_khz(&clocksource_bcmring_timer1,
- TIMER1_FREQUENCY_MHZ * 1000);
+ sp804_clocksource_init(TIMER1_VA_BASE, "timer1");
/* setup timer3 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_register_khz(&clocksource_bcmring_timer3,
- TIMER3_FREQUENCY_KHZ);
+ sp804_clocksource_init(TIMER3_VA_BASE, "timer3");
return 0;
}
@@ -347,21 +233,16 @@ void __init bcmring_init_timer(void)
/*
* Make irqs happen for the system timer
*/
- setup_irq(IRQ_TIMER0, &bcmring_timer_irq);
-
bcmring_clocksource_init();
- 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);
-
- timer0_clockevent.cpumask = cpumask_of(0);
- clockevents_register_device(&timer0_clockevent);
+ sp804_clockevents_register(TIMER0_VA_BASE, IRQ_TIMER0, "timer0");
}
struct sys_timer bcmring_timer = {
.init = bcmring_init_timer,
};
+
+void __init bcmring_init_early(void)
+{
+ clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 06:59:14 +0000