diff options
Diffstat (limited to 'arch/mips/sibyte/bcm1480/time.c')
| -rw-r--r-- | arch/mips/sibyte/bcm1480/time.c | 160 |
1 files changed, 3 insertions, 157 deletions
diff --git a/arch/mips/sibyte/bcm1480/time.c b/arch/mips/sibyte/bcm1480/time.c index 2bcaf5419ac1..1680a68952ae 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) { |