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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-12-15 14:52:16 -0300
commit8d91c1e411f55d7ea91b1183a2e9f8088fb4d5be (patch)
treee9891aa6c295060d065adffd610c4f49ecf884f3 /arch/arm/mach-gemini
parenta71852147516bc1cb5b0b3cbd13639bfd4022dc8 (diff)
Linux-libre 4.3.2-gnu
Diffstat (limited to 'arch/arm/mach-gemini')
-rw-r--r--arch/arm/mach-gemini/gpio.c4
-rw-r--r--arch/arm/mach-gemini/include/mach/hardware.h3
-rw-r--r--arch/arm/mach-gemini/irq.c2
-rw-r--r--arch/arm/mach-gemini/time.c219
4 files changed, 147 insertions, 81 deletions
diff --git a/arch/arm/mach-gemini/gpio.c b/arch/arm/mach-gemini/gpio.c
index 3292f2e6e..2478d9f4d 100644
--- a/arch/arm/mach-gemini/gpio.c
+++ b/arch/arm/mach-gemini/gpio.c
@@ -126,7 +126,7 @@ static int gpio_set_irq_type(struct irq_data *d, unsigned int type)
return 0;
}
-static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+static void gpio_irq_handler(struct irq_desc *desc)
{
unsigned int port = (unsigned int)irq_desc_get_handler_data(desc);
unsigned int gpio_irq_no, irq_stat;
@@ -220,7 +220,7 @@ void __init gemini_gpio_init(void)
j < GPIO_IRQ_BASE + (i + 1) * 32; j++) {
irq_set_chip_and_handler(j, &gpio_irq_chip,
handle_edge_irq);
- set_irq_flags(j, IRQF_VALID);
+ irq_clear_status_flags(j, IRQ_NOREQUEST);
}
irq_set_chained_handler_and_data(IRQ_GPIO(i), gpio_irq_handler,
diff --git a/arch/arm/mach-gemini/include/mach/hardware.h b/arch/arm/mach-gemini/include/mach/hardware.h
index 98e7b0f28..f0390f184 100644
--- a/arch/arm/mach-gemini/include/mach/hardware.h
+++ b/arch/arm/mach-gemini/include/mach/hardware.h
@@ -57,9 +57,6 @@
#define GEMINI_USB1_BASE 0x69000000
#define GEMINI_BIG_ENDIAN_BASE 0x80000000
-#define GEMINI_TIMER1_BASE GEMINI_TIMER_BASE
-#define GEMINI_TIMER2_BASE (GEMINI_TIMER_BASE + 0x10)
-#define GEMINI_TIMER3_BASE (GEMINI_TIMER_BASE + 0x20)
/*
* UART Clock when System clk is 150MHz
diff --git a/arch/arm/mach-gemini/irq.c b/arch/arm/mach-gemini/irq.c
index 44f50dcb6..d929b3ff1 100644
--- a/arch/arm/mach-gemini/irq.c
+++ b/arch/arm/mach-gemini/irq.c
@@ -92,7 +92,7 @@ void __init gemini_init_irq(void)
} else {
irq_set_handler(i, handle_level_irq);
}
- set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
+ irq_clear_status_flags(i, IRQ_NOREQUEST | IRQ_NOPROBE);
}
/* Disable all interrupts */
diff --git a/arch/arm/mach-gemini/time.c b/arch/arm/mach-gemini/time.c
index 0a63c4d25..f5f18df5a 100644
--- a/arch/arm/mach-gemini/time.c
+++ b/arch/arm/mach-gemini/time.c
@@ -15,93 +15,147 @@
#include <asm/mach/time.h>
#include <linux/clockchips.h>
#include <linux/clocksource.h>
+#include <linux/sched_clock.h>
/*
* Register definitions for the timers
*/
-#define TIMER_COUNT(BASE_ADDR) (BASE_ADDR + 0x00)
-#define TIMER_LOAD(BASE_ADDR) (BASE_ADDR + 0x04)
-#define TIMER_MATCH1(BASE_ADDR) (BASE_ADDR + 0x08)
-#define TIMER_MATCH2(BASE_ADDR) (BASE_ADDR + 0x0C)
-#define TIMER_CR(BASE_ADDR) (BASE_ADDR + 0x30)
-
-#define TIMER_1_CR_ENABLE (1 << 0)
-#define TIMER_1_CR_CLOCK (1 << 1)
-#define TIMER_1_CR_INT (1 << 2)
-#define TIMER_2_CR_ENABLE (1 << 3)
-#define TIMER_2_CR_CLOCK (1 << 4)
-#define TIMER_2_CR_INT (1 << 5)
-#define TIMER_3_CR_ENABLE (1 << 6)
-#define TIMER_3_CR_CLOCK (1 << 7)
-#define TIMER_3_CR_INT (1 << 8)
+
+#define TIMER1_BASE GEMINI_TIMER_BASE
+#define TIMER2_BASE (GEMINI_TIMER_BASE + 0x10)
+#define TIMER3_BASE (GEMINI_TIMER_BASE + 0x20)
+
+#define TIMER_COUNT(BASE) (IO_ADDRESS(BASE) + 0x00)
+#define TIMER_LOAD(BASE) (IO_ADDRESS(BASE) + 0x04)
+#define TIMER_MATCH1(BASE) (IO_ADDRESS(BASE) + 0x08)
+#define TIMER_MATCH2(BASE) (IO_ADDRESS(BASE) + 0x0C)
+#define TIMER_CR (IO_ADDRESS(GEMINI_TIMER_BASE) + 0x30)
+#define TIMER_INTR_STATE (IO_ADDRESS(GEMINI_TIMER_BASE) + 0x34)
+#define TIMER_INTR_MASK (IO_ADDRESS(GEMINI_TIMER_BASE) + 0x38)
+
+#define TIMER_1_CR_ENABLE (1 << 0)
+#define TIMER_1_CR_CLOCK (1 << 1)
+#define TIMER_1_CR_INT (1 << 2)
+#define TIMER_2_CR_ENABLE (1 << 3)
+#define TIMER_2_CR_CLOCK (1 << 4)
+#define TIMER_2_CR_INT (1 << 5)
+#define TIMER_3_CR_ENABLE (1 << 6)
+#define TIMER_3_CR_CLOCK (1 << 7)
+#define TIMER_3_CR_INT (1 << 8)
+#define TIMER_1_CR_UPDOWN (1 << 9)
+#define TIMER_2_CR_UPDOWN (1 << 10)
+#define TIMER_3_CR_UPDOWN (1 << 11)
+#define TIMER_DEFAULT_FLAGS (TIMER_1_CR_UPDOWN | \
+ TIMER_3_CR_ENABLE | \
+ TIMER_3_CR_UPDOWN)
+
+#define TIMER_1_INT_MATCH1 (1 << 0)
+#define TIMER_1_INT_MATCH2 (1 << 1)
+#define TIMER_1_INT_OVERFLOW (1 << 2)
+#define TIMER_2_INT_MATCH1 (1 << 3)
+#define TIMER_2_INT_MATCH2 (1 << 4)
+#define TIMER_2_INT_OVERFLOW (1 << 5)
+#define TIMER_3_INT_MATCH1 (1 << 6)
+#define TIMER_3_INT_MATCH2 (1 << 7)
+#define TIMER_3_INT_OVERFLOW (1 << 8)
+#define TIMER_INT_ALL_MASK 0x1ff
+
static unsigned int tick_rate;
+static u64 notrace gemini_read_sched_clock(void)
+{
+ return readl(TIMER_COUNT(TIMER3_BASE));
+}
+
static int gemini_timer_set_next_event(unsigned long cycles,
struct clock_event_device *evt)
{
u32 cr;
- cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
+ /* Setup the match register */
+ cr = readl(TIMER_COUNT(TIMER1_BASE));
+ writel(cr + cycles, TIMER_MATCH1(TIMER1_BASE));
+ if (readl(TIMER_COUNT(TIMER1_BASE)) - cr > cycles)
+ return -ETIME;
- /* This may be overdoing it, feel free to test without this */
- cr &= ~TIMER_2_CR_ENABLE;
- cr &= ~TIMER_2_CR_INT;
- writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
+ return 0;
+}
- /* Set next event */
- writel(cycles, TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER2_BASE)));
- writel(cycles, TIMER_LOAD(IO_ADDRESS(GEMINI_TIMER2_BASE)));
- cr |= TIMER_2_CR_ENABLE;
- cr |= TIMER_2_CR_INT;
- writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
+static int gemini_timer_shutdown(struct clock_event_device *evt)
+{
+ u32 cr;
+
+ /*
+ * Disable also for oneshot: the set_next() call will arm the timer
+ * instead.
+ */
+ /* Stop timer and interrupt. */
+ cr = readl(TIMER_CR);
+ cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT);
+ writel(cr, TIMER_CR);
+
+ /* Setup counter start from 0 */
+ writel(0, TIMER_COUNT(TIMER1_BASE));
+ writel(0, TIMER_LOAD(TIMER1_BASE));
+
+ /* enable interrupt */
+ cr = readl(TIMER_INTR_MASK);
+ cr &= ~(TIMER_1_INT_OVERFLOW | TIMER_1_INT_MATCH2);
+ cr |= TIMER_1_INT_MATCH1;
+ writel(cr, TIMER_INTR_MASK);
+
+ /* start the timer */
+ cr = readl(TIMER_CR);
+ cr |= TIMER_1_CR_ENABLE;
+ writel(cr, TIMER_CR);
return 0;
}
-static void gemini_timer_set_mode(enum clock_event_mode mode,
- struct clock_event_device *evt)
+static int gemini_timer_set_periodic(struct clock_event_device *evt)
{
u32 period = DIV_ROUND_CLOSEST(tick_rate, HZ);
u32 cr;
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- /* Start the timer */
- writel(period,
- TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER2_BASE)));
- writel(period,
- TIMER_LOAD(IO_ADDRESS(GEMINI_TIMER2_BASE)));
- cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- cr |= TIMER_2_CR_ENABLE;
- cr |= TIMER_2_CR_INT;
- writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_RESUME:
- /*
- * Disable also for oneshot: the set_next() call will
- * arm the timer instead.
- */
- cr = readl(TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- cr &= ~TIMER_2_CR_ENABLE;
- cr &= ~TIMER_2_CR_INT;
- writel(cr, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- break;
- default:
- break;
- }
+ /* Stop timer and interrupt */
+ cr = readl(TIMER_CR);
+ cr &= ~(TIMER_1_CR_ENABLE | TIMER_1_CR_INT);
+ writel(cr, TIMER_CR);
+
+ /* Setup timer to fire at 1/HT intervals. */
+ cr = 0xffffffff - (period - 1);
+ writel(cr, TIMER_COUNT(TIMER1_BASE));
+ writel(cr, TIMER_LOAD(TIMER1_BASE));
+
+ /* enable interrupt on overflow */
+ cr = readl(TIMER_INTR_MASK);
+ cr &= ~(TIMER_1_INT_MATCH1 | TIMER_1_INT_MATCH2);
+ cr |= TIMER_1_INT_OVERFLOW;
+ writel(cr, TIMER_INTR_MASK);
+
+ /* Start the timer */
+ cr = readl(TIMER_CR);
+ cr |= TIMER_1_CR_ENABLE;
+ cr |= TIMER_1_CR_INT;
+ writel(cr, TIMER_CR);
+
+ return 0;
}
-/* Use TIMER2 as clock event */
+/* Use TIMER1 as clock event */
static struct clock_event_device gemini_clockevent = {
- .name = "TIMER2",
- .rating = 300, /* Reasonably fast and accurate clock event */
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_next_event = gemini_timer_set_next_event,
- .set_mode = gemini_timer_set_mode,
+ .name = "TIMER1",
+ /* Reasonably fast and accurate clock event */
+ .rating = 300,
+ .shift = 32,
+ .features = CLOCK_EVT_FEAT_PERIODIC |
+ CLOCK_EVT_FEAT_ONESHOT,
+ .set_next_event = gemini_timer_set_next_event,
+ .set_state_shutdown = gemini_timer_shutdown,
+ .set_state_periodic = gemini_timer_set_periodic,
+ .set_state_oneshot = gemini_timer_shutdown,
+ .tick_resume = gemini_timer_shutdown,
};
/*
@@ -151,20 +205,35 @@ void __init gemini_timer_init(void)
}
/*
- * Make irqs happen for the system timer
+ * Reset the interrupt mask and status
*/
- setup_irq(IRQ_TIMER2, &gemini_timer_irq);
-
- /* Enable and use TIMER1 as clock source */
- writel(0xffffffff, TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER1_BASE)));
- writel(0xffffffff, TIMER_LOAD(IO_ADDRESS(GEMINI_TIMER1_BASE)));
- writel(TIMER_1_CR_ENABLE, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
- if (clocksource_mmio_init(TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER1_BASE)),
- "TIMER1", tick_rate, 300, 32,
- clocksource_mmio_readl_up))
- pr_err("timer: failed to initialize gemini clock source\n");
-
- /* Configure and register the clockevent */
+ writel(TIMER_INT_ALL_MASK, TIMER_INTR_MASK);
+ writel(0, TIMER_INTR_STATE);
+ writel(TIMER_DEFAULT_FLAGS, TIMER_CR);
+
+ /*
+ * Setup free-running clocksource timer (interrupts
+ * disabled.)
+ */
+ writel(0, TIMER_COUNT(TIMER3_BASE));
+ writel(0, TIMER_LOAD(TIMER3_BASE));
+ writel(0, TIMER_MATCH1(TIMER3_BASE));
+ writel(0, TIMER_MATCH2(TIMER3_BASE));
+ clocksource_mmio_init(TIMER_COUNT(TIMER3_BASE),
+ "gemini_clocksource", tick_rate,
+ 300, 32, clocksource_mmio_readl_up);
+ sched_clock_register(gemini_read_sched_clock, 32, tick_rate);
+
+ /*
+ * Setup clockevent timer (interrupt-driven.)
+ */
+ writel(0, TIMER_COUNT(TIMER1_BASE));
+ writel(0, TIMER_LOAD(TIMER1_BASE));
+ writel(0, TIMER_MATCH1(TIMER1_BASE));
+ writel(0, TIMER_MATCH2(TIMER1_BASE));
+ setup_irq(IRQ_TIMER1, &gemini_timer_irq);
+ gemini_clockevent.cpumask = cpumask_of(0);
clockevents_config_and_register(&gemini_clockevent, tick_rate,
1, 0xffffffff);
+
}