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authorRalf Baechle <ralf@linux-mips.org>2007-11-01 01:57:55 +0000
committerRalf Baechle <ralf@linux-mips.org>2007-11-02 16:13:47 +0000
commit217dd11e9d0442767fa13c9c188be0b92dc93d7e (patch)
tree9557e15fbad397fcc5a707e85cf1a68132ee6c31 /arch/mips/sibyte/bcm1480
parentf3f9ad0edcc1b7bf154bb34fe3b3f71e5379c9f0 (diff)
[MIPS] Sibyte: Split and move clock code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/sibyte/bcm1480')
-rw-r--r--arch/mips/sibyte/bcm1480/time.c160
1 files changed, 3 insertions, 157 deletions
diff --git a/arch/mips/sibyte/bcm1480/time.c b/arch/mips/sibyte/bcm1480/time.c
index 2bcaf5419ac..1680a68952a 100644
--- a/arch/mips/sibyte/bcm1480/time.c
+++ b/arch/mips/sibyte/bcm1480/time.c
@@ -15,164 +15,10 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
-#include <linux/clockchips.h>
-#include <linux/interrupt.h>
-#include <linux/percpu.h>
+#include <linux/init.h>
-#include <asm/addrspace.h>
-#include <asm/io.h>
-#include <asm/time.h>
-
-#include <asm/sibyte/bcm1480_regs.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/bcm1480_int.h>
-#include <asm/sibyte/bcm1480_scd.h>
-
-#include <asm/sibyte/sb1250.h>
-
-
-#define IMR_IP2_VAL K_BCM1480_INT_MAP_I0
-#define IMR_IP3_VAL K_BCM1480_INT_MAP_I1
-#define IMR_IP4_VAL K_BCM1480_INT_MAP_I2
-
-/*
- * The general purpose timer ticks at 1MHz independent if
- * the rest of the system
- */
-static void sibyte_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- unsigned int cpu = smp_processor_id();
- void __iomem *cfg, *init;
-
- cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
- init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- __raw_writeq(0, cfg);
- __raw_writeq((V_SCD_TIMER_FREQ / HZ) - 1, init);
- __raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
- cfg);
- break;
-
- case CLOCK_EVT_MODE_ONESHOT:
- /* Stop the timer until we actually program a shot */
- case CLOCK_EVT_MODE_SHUTDOWN:
- __raw_writeq(0, cfg);
- break;
-
- case CLOCK_EVT_MODE_UNUSED: /* shuddup gcc */
- case CLOCK_EVT_MODE_RESUME:
- ;
- }
-}
-
-static int sibyte_next_event(unsigned long delta, struct clock_event_device *cd)
-{
- unsigned int cpu = smp_processor_id();
- void __iomem *cfg, *init;
-
- cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
- init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
-
- __raw_writeq(delta - 1, init);
- __raw_writeq(M_SCD_TIMER_ENABLE, cfg);
-
- return 0;
-}
-
-static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
-{
- unsigned int cpu = smp_processor_id();
- struct clock_event_device *cd = dev_id;
- void __iomem *cfg;
- unsigned long tmode;
-
- if (cd->mode == CLOCK_EVT_MODE_PERIODIC)
- tmode = M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS;
- else
- tmode = 0;
-
- /* ACK interrupt */
- cfg = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG));
- ____raw_writeq(tmode, cfg);
-
- cd->event_handler(cd);
-
- return IRQ_HANDLED;
-}
-
-static DEFINE_PER_CPU(struct clock_event_device, sibyte_hpt_clockevent);
-static DEFINE_PER_CPU(struct irqaction, sibyte_hpt_irqaction);
-static DEFINE_PER_CPU(char [18], sibyte_hpt_name);
-
-void __cpuinit sb1480_clockevent_init(void)
-{
- unsigned int cpu = smp_processor_id();
- unsigned int irq = K_BCM1480_INT_TIMER_0 + cpu;
- struct irqaction *action = &per_cpu(sibyte_hpt_irqaction, cpu);
- struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
- unsigned char *name = per_cpu(sibyte_hpt_name, cpu);
-
- BUG_ON(cpu > 3); /* Only have 4 general purpose timers */
-
- sprintf(name, "bcm1480-counter-%d", cpu);
- cd->name = name;
- cd->features = CLOCK_EVT_FEAT_PERIODIC |
- CLOCK_EVT_FEAT_ONESHOT;
- clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
- cd->max_delta_ns = clockevent_delta2ns(0x7fffff, cd);
- cd->min_delta_ns = clockevent_delta2ns(1, cd);
- cd->rating = 200;
- cd->irq = irq;
- cd->cpumask = cpumask_of_cpu(cpu);
- cd->set_next_event = sibyte_next_event;
- cd->set_mode = sibyte_set_mode;
- clockevents_register_device(cd);
-
- bcm1480_mask_irq(cpu, irq);
-
- /*
- * Map the timer interrupt to IP[4] of this cpu
- */
- __raw_writeq(IMR_IP4_VAL,
- IOADDR(A_BCM1480_IMR_REGISTER(cpu,
- R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) + (irq << 3)));
-
- bcm1480_unmask_irq(cpu, irq);
-
- action->handler = sibyte_counter_handler;
- action->flags = IRQF_DISABLED | IRQF_PERCPU;
- action->name = name;
- action->dev_id = cd;
- setup_irq(irq, action);
-}
-
-static cycle_t bcm1480_hpt_read(void)
-{
- return (cycle_t) __raw_readq(IOADDR(A_SCD_ZBBUS_CYCLE_COUNT));
-}
-
-struct clocksource bcm1480_clocksource = {
- .name = "zbbus-cycles",
- .rating = 200,
- .read = bcm1480_hpt_read,
- .mask = CLOCKSOURCE_MASK(64),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-void __init sb1480_clocksource_init(void)
-{
- struct clocksource *cs = &bcm1480_clocksource;
- unsigned int plldiv;
- unsigned long zbbus;
-
- plldiv = G_BCM1480_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG)));
- zbbus = ((plldiv >> 1) * 50000000) + ((plldiv & 1) * 25000000);
- clocksource_set_clock(cs, zbbus);
- clocksource_register(cs);
-}
+extern void sb1480_clockevent_init(void);
+extern void sb1480_clocksource_init(void);
void __init plat_time_init(void)
{