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-rw-r--r--arch/arm/mach-omap2/Kconfig1
-rw-r--r--arch/arm/mach-omap2/timer-gp.c86
-rw-r--r--arch/arm/plat-omap/Kconfig2
-rw-r--r--arch/arm/plat-omap/dmtimer.c413
-rw-r--r--arch/arm/plat-omap/timer32k.c121
5 files changed, 367 insertions, 256 deletions
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 537dd2e6d38..aab97ccf1e6 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -8,6 +8,7 @@ config ARCH_OMAP24XX
config ARCH_OMAP2420
bool "OMAP2420 support"
depends on ARCH_OMAP24XX
+ select OMAP_DM_TIMER
comment "OMAP Board Type"
depends on ARCH_OMAP2
diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c
index 1d2f5ac2f69..3358c0d47b1 100644
--- a/arch/arm/mach-omap2/timer-gp.c
+++ b/arch/arm/mach-omap2/timer-gp.c
@@ -6,6 +6,7 @@
* Copyright (C) 2005 Nokia Corporation
* Author: Paul Mundt <paul.mundt@nokia.com>
* Juha Yrjölä <juha.yrjola@nokia.com>
+ * OMAP Dual-mode timer framework support by Timo Teras
*
* Some parts based off of TI's 24xx code:
*
@@ -22,54 +23,18 @@
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/clk.h>
+#include <linux/delay.h>
#include <asm/mach/time.h>
-#include <asm/delay.h>
-#include <asm/io.h>
+#include <asm/arch/dmtimer.h>
-#define OMAP2_GP_TIMER1_BASE 0x48028000
-#define OMAP2_GP_TIMER2_BASE 0x4802a000
-#define OMAP2_GP_TIMER3_BASE 0x48078000
-#define OMAP2_GP_TIMER4_BASE 0x4807a000
+static struct omap_dm_timer *gptimer;
-#define GP_TIMER_TIDR 0x00
-#define GP_TIMER_TISR 0x18
-#define GP_TIMER_TIER 0x1c
-#define GP_TIMER_TCLR 0x24
-#define GP_TIMER_TCRR 0x28
-#define GP_TIMER_TLDR 0x2c
-#define GP_TIMER_TSICR 0x40
-
-#define OS_TIMER_NR 1 /* GP timer 2 */
-
-static unsigned long timer_base[] = {
- IO_ADDRESS(OMAP2_GP_TIMER1_BASE),
- IO_ADDRESS(OMAP2_GP_TIMER2_BASE),
- IO_ADDRESS(OMAP2_GP_TIMER3_BASE),
- IO_ADDRESS(OMAP2_GP_TIMER4_BASE),
-};
-
-static inline unsigned int timer_read_reg(int nr, unsigned int reg)
-{
- return __raw_readl(timer_base[nr] + reg);
-}
-
-static inline void timer_write_reg(int nr, unsigned int reg, unsigned int val)
-{
- __raw_writel(val, timer_base[nr] + reg);
-}
-
-/* Note that we always enable the clock prescale divider bit */
-static inline void omap2_gp_timer_start(int nr, unsigned long load_val)
+static inline void omap2_gp_timer_start(unsigned long load_val)
{
- unsigned int tmp;
-
- tmp = 0xffffffff - load_val;
-
- timer_write_reg(nr, GP_TIMER_TLDR, tmp);
- timer_write_reg(nr, GP_TIMER_TCRR, tmp);
- timer_write_reg(nr, GP_TIMER_TIER, 1 << 1);
- timer_write_reg(nr, GP_TIMER_TCLR, (1 << 5) | (1 << 1) | 1);
+ omap_dm_timer_set_load(gptimer, 1, 0xffffffff - load_val);
+ omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
+ omap_dm_timer_start(gptimer);
}
static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id,
@@ -77,7 +42,7 @@ static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id,
{
write_seqlock(&xtime_lock);
- timer_write_reg(OS_TIMER_NR, GP_TIMER_TISR, 1 << 1);
+ omap_dm_timer_write_status(gptimer, OMAP_TIMER_INT_OVERFLOW);
timer_tick(regs);
write_sequnlock(&xtime_lock);
@@ -87,41 +52,26 @@ static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id,
static struct irqaction omap2_gp_timer_irq = {
.name = "gp timer",
- .flags = SA_INTERRUPT,
+ .flags = SA_INTERRUPT | SA_TIMER,
.handler = omap2_gp_timer_interrupt,
};
static void __init omap2_gp_timer_init(void)
{
- struct clk * sys_ck;
- u32 tick_period = 120000;
- u32 l;
+ u32 tick_period;
- /* Reset clock and prescale value */
- timer_write_reg(OS_TIMER_NR, GP_TIMER_TCLR, 0);
+ omap_dm_timer_init();
+ gptimer = omap_dm_timer_request_specific(2);
+ BUG_ON(gptimer == NULL);
- sys_ck = clk_get(NULL, "sys_ck");
- if (IS_ERR(sys_ck))
- printk(KERN_ERR "Could not get sys_ck\n");
- else {
- clk_enable(sys_ck);
- tick_period = clk_get_rate(sys_ck) / 100;
- clk_put(sys_ck);
- }
-
- tick_period /= 2; /* Minimum prescale divider is 2 */
+ omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_SYS_CLK);
+ tick_period = clk_get_rate(omap_dm_timer_get_fclk(gptimer)) / 100;
tick_period -= 1;
- l = timer_read_reg(OS_TIMER_NR, GP_TIMER_TIDR);
- printk(KERN_INFO "OMAP2 GP timer (HW version %d.%d)\n",
- (l >> 4) & 0x0f, l & 0x0f);
-
- setup_irq(38, &omap2_gp_timer_irq);
-
- omap2_gp_timer_start(OS_TIMER_NR, tick_period);
+ setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq);
+ omap2_gp_timer_start(tick_period);
}
struct sys_timer omap_timer = {
.init = omap2_gp_timer_init,
};
-
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index ec49495e651..ec752e16d61 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -91,7 +91,7 @@ config OMAP_32K_TIMER_HZ
config OMAP_DM_TIMER
bool "Use dual-mode timer"
- depends on ARCH_OMAP16XX
+ depends on ARCH_OMAP16XX || ARCH_OMAP24XX
help
Select this option if you want to use OMAP Dual-Mode timers.
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index eba3cb52ad8..c25a1a6d2b0 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -4,7 +4,8 @@
* OMAP Dual-Mode Timers
*
* Copyright (C) 2005 Nokia Corporation
- * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
+ * OMAP2 support by Juha Yrjola
+ * API improvements and OMAP2 clock framework support by Timo Teras
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -26,15 +27,17 @@
*/
#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
#include <asm/hardware.h>
#include <asm/arch/dmtimer.h>
#include <asm/io.h>
#include <asm/arch/irqs.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-
-#define OMAP_TIMER_COUNT 8
+/* register offsets */
#define OMAP_TIMER_ID_REG 0x00
#define OMAP_TIMER_OCP_CFG_REG 0x10
#define OMAP_TIMER_SYS_STAT_REG 0x14
@@ -50,52 +53,184 @@
#define OMAP_TIMER_CAPTURE_REG 0x3c
#define OMAP_TIMER_IF_CTRL_REG 0x40
+/* timer control reg bits */
+#define OMAP_TIMER_CTRL_GPOCFG (1 << 14)
+#define OMAP_TIMER_CTRL_CAPTMODE (1 << 13)
+#define OMAP_TIMER_CTRL_PT (1 << 12)
+#define OMAP_TIMER_CTRL_TCM_LOWTOHIGH (0x1 << 8)
+#define OMAP_TIMER_CTRL_TCM_HIGHTOLOW (0x2 << 8)
+#define OMAP_TIMER_CTRL_TCM_BOTHEDGES (0x3 << 8)
+#define OMAP_TIMER_CTRL_SCPWM (1 << 7)
+#define OMAP_TIMER_CTRL_CE (1 << 6) /* compare enable */
+#define OMAP_TIMER_CTRL_PRE (1 << 5) /* prescaler enable */
+#define OMAP_TIMER_CTRL_PTV_SHIFT 2 /* how much to shift the prescaler value */
+#define OMAP_TIMER_CTRL_AR (1 << 1) /* auto-reload enable */
+#define OMAP_TIMER_CTRL_ST (1 << 0) /* start timer */
+
+struct omap_dm_timer {
+ unsigned long phys_base;
+ int irq;
+#ifdef CONFIG_ARCH_OMAP2
+ struct clk *iclk, *fclk;
+#endif
+ void __iomem *io_base;
+ unsigned reserved:1;
+};
+
+#ifdef CONFIG_ARCH_OMAP1
+
+static struct omap_dm_timer dm_timers[] = {
+ { .phys_base = 0xfffb1400, .irq = INT_1610_GPTIMER1 },
+ { .phys_base = 0xfffb1c00, .irq = INT_1610_GPTIMER2 },
+ { .phys_base = 0xfffb2400, .irq = INT_1610_GPTIMER3 },
+ { .phys_base = 0xfffb2c00, .irq = INT_1610_GPTIMER4 },
+ { .phys_base = 0xfffb3400, .irq = INT_1610_GPTIMER5 },
+ { .phys_base = 0xfffb3c00, .irq = INT_1610_GPTIMER6 },
+ { .phys_base = 0xfffb4400, .irq = INT_1610_GPTIMER7 },
+ { .phys_base = 0xfffb4c00, .irq = INT_1610_GPTIMER8 },
+};
-static struct dmtimer_info_struct {
- struct list_head unused_timers;
- struct list_head reserved_timers;
-} dm_timer_info;
+#elif defined(CONFIG_ARCH_OMAP2)
static struct omap_dm_timer dm_timers[] = {
- { .base=0xfffb1400, .irq=INT_1610_GPTIMER1 },
- { .base=0xfffb1c00, .irq=INT_1610_GPTIMER2 },
- { .base=0xfffb2400, .irq=INT_1610_GPTIMER3 },
- { .base=0xfffb2c00, .irq=INT_1610_GPTIMER4 },
- { .base=0xfffb3400, .irq=INT_1610_GPTIMER5 },
- { .base=0xfffb3c00, .irq=INT_1610_GPTIMER6 },
- { .base=0xfffb4400, .irq=INT_1610_GPTIMER7 },
- { .base=0xfffb4c00, .irq=INT_1610_GPTIMER8 },
- { .base=0x0 },
+ { .phys_base = 0x48028000, .irq = INT_24XX_GPTIMER1 },
+ { .phys_base = 0x4802a000, .irq = INT_24XX_GPTIMER2 },
+ { .phys_base = 0x48078000, .irq = INT_24XX_GPTIMER3 },
+ { .phys_base = 0x4807a000, .irq = INT_24XX_GPTIMER4 },
+ { .phys_base = 0x4807c000, .irq = INT_24XX_GPTIMER5 },
+ { .phys_base = 0x4807e000, .irq = INT_24XX_GPTIMER6 },
+ { .phys_base = 0x48080000, .irq = INT_24XX_GPTIMER7 },
+ { .phys_base = 0x48082000, .irq = INT_24XX_GPTIMER8 },
+ { .phys_base = 0x48084000, .irq = INT_24XX_GPTIMER9 },
+ { .phys_base = 0x48086000, .irq = INT_24XX_GPTIMER10 },
+ { .phys_base = 0x48088000, .irq = INT_24XX_GPTIMER11 },
+ { .phys_base = 0x4808a000, .irq = INT_24XX_GPTIMER12 },
};
+#else
+
+#error OMAP architecture not supported!
+
+#endif
+
+static const int dm_timer_count = ARRAY_SIZE(dm_timers);
static spinlock_t dm_timer_lock;
+static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg)
+{
+ return readl(timer->io_base + reg);
+}
-inline void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value)
+static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value)
{
- omap_writel(value, timer->base + reg);
+ writel(value, timer->io_base + reg);
while (omap_dm_timer_read_reg(timer, OMAP_TIMER_WRITE_PEND_REG))
;
}
-u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg)
+static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer)
{
- return omap_readl(timer->base + reg);
+ int c;
+
+ c = 0;
+ while (!(omap_dm_timer_read_reg(timer, OMAP_TIMER_SYS_STAT_REG) & 1)) {
+ c++;
+ if (c > 100000) {
+ printk(KERN_ERR "Timer failed to reset\n");
+ return;
+ }
+ }
}
-int omap_dm_timers_active(void)
+static void omap_dm_timer_reset(struct omap_dm_timer *timer)
+{
+ u32 l;
+
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);
+ omap_dm_timer_wait_for_reset(timer);
+
+ omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_SYS_CLK);
+
+ /* Set to smart-idle mode */
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_OCP_CFG_REG);
+ l |= 0x02 << 3;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, l);
+}
+
+static void omap_dm_timer_reserve(struct omap_dm_timer *timer)
+{
+ timer->reserved = 1;
+#ifdef CONFIG_ARCH_OMAP2
+ clk_enable(timer->iclk);
+ clk_enable(timer->fclk);
+#endif
+ omap_dm_timer_reset(timer);
+}
+
+struct omap_dm_timer *omap_dm_timer_request(void)
+{
+ struct omap_dm_timer *timer = NULL;
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&dm_timer_lock, flags);
+ for (i = 0; i < dm_timer_count; i++) {
+ if (dm_timers[i].reserved)
+ continue;
+
+ timer = &dm_timers[i];
+ omap_dm_timer_reserve(timer);
+ break;
+ }
+ spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+ return timer;
+}
+
+struct omap_dm_timer *omap_dm_timer_request_specific(int id)
{
struct omap_dm_timer *timer;
+ unsigned long flags;
- for (timer = &dm_timers[0]; timer->base; ++timer)
- if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) &
- OMAP_TIMER_CTRL_ST)
- return 1;
+ spin_lock_irqsave(&dm_timer_lock, flags);
+ if (id <= 0 || id > dm_timer_count || dm_timers[id-1].reserved) {
+ spin_unlock_irqrestore(&dm_timer_lock, flags);
+ printk("BUG: warning at %s:%d/%s(): unable to get timer %d\n",
+ __FILE__, __LINE__, __FUNCTION__, id);
+ dump_stack();
+ return NULL;
+ }
- return 0;
+ timer = &dm_timers[id-1];
+ omap_dm_timer_reserve(timer);
+ spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+ return timer;
}
+void omap_dm_timer_free(struct omap_dm_timer *timer)
+{
+ omap_dm_timer_reset(timer);
+#ifdef CONFIG_ARCH_OMAP2
+ clk_disable(timer->iclk);
+ clk_disable(timer->fclk);
+#endif
+ WARN_ON(!timer->reserved);
+ timer->reserved = 0;
+}
+
+int omap_dm_timer_get_irq(struct omap_dm_timer *timer)
+{
+ return timer->irq;
+}
+
+#if defined(CONFIG_ARCH_OMAP1)
+
+struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
+{
+ BUG();
+}
/**
* omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR
@@ -103,184 +238,226 @@ int omap_dm_timers_active(void)
*/
__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
{
- int n;
+ int i;
/* If ARMXOR cannot be idled this function call is unnecessary */
if (!(inputmask & (1 << 1)))
return inputmask;
/* If any active timer is using ARMXOR return modified mask */
- for (n = 0; dm_timers[n].base; ++n)
- if (omap_dm_timer_read_reg(&dm_timers[n], OMAP_TIMER_CTRL_REG)&
- OMAP_TIMER_CTRL_ST) {
- if (((omap_readl(MOD_CONF_CTRL_1)>>(n*2)) & 0x03) == 0)
+ for (i = 0; i < dm_timer_count; i++) {
+ u32 l;
+
+ l = omap_dm_timer_read_reg(&dm_timers[n], OMAP_TIMER_CTRL_REG);
+ if (l & OMAP_TIMER_CTRL_ST) {
+ if (((omap_readl(MOD_CONF_CTRL_1) >> (i * 2)) & 0x03) == 0)
inputmask &= ~(1 << 1);
else
inputmask &= ~(1 << 2);
}
+ }
return inputmask;
}
+#elif defined(CONFIG_ARCH_OMAP2)
-void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
+struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
{
- int n = (timer - dm_timers) << 1;
- u32 l;
+ return timer->fclk;
+}
- l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
- l |= source << n;
- omap_writel(l, MOD_CONF_CTRL_1);
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
+{
+ BUG();
}
+#endif
-static void omap_dm_timer_reset(struct omap_dm_timer *timer)
+void omap_dm_timer_trigger(struct omap_dm_timer *timer)
{
- /* Reset and set posted mode */
- omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);
- omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, 0x02);
-
- omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_ARMXOR);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
}
+void omap_dm_timer_start(struct omap_dm_timer *timer)
+{
+ u32 l;
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (!(l & OMAP_TIMER_CTRL_ST)) {
+ l |= OMAP_TIMER_CTRL_ST;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+ }
+}
-struct omap_dm_timer * omap_dm_timer_request(void)
+void omap_dm_timer_stop(struct omap_dm_timer *timer)
{
- struct omap_dm_timer *timer = NULL;
- unsigned long flags;
+ u32 l;
- spin_lock_irqsave(&dm_timer_lock, flags);
- if (!list_empty(&dm_timer_info.unused_timers)) {
- timer = (struct omap_dm_timer *)
- dm_timer_info.unused_timers.next;
- list_move_tail((struct list_head *)timer,
- &dm_timer_info.reserved_timers);
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (l & OMAP_TIMER_CTRL_ST) {
+ l &= ~0x1;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
}
- spin_unlock_irqrestore(&dm_timer_lock, flags);
-
- return timer;
}
+#ifdef CONFIG_ARCH_OMAP1
-void omap_dm_timer_free(struct omap_dm_timer *timer)
+void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
{
- unsigned long flags;
-
- omap_dm_timer_reset(timer);
+ int n = (timer - dm_timers) << 1;
+ u32 l;
- spin_lock_irqsave(&dm_timer_lock, flags);
- list_move_tail((struct list_head *)timer, &dm_timer_info.unused_timers);
- spin_unlock_irqrestore(&dm_timer_lock, flags);
+ l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
+ l |= source << n;
+ omap_writel(l, MOD_CONF_CTRL_1);
}
-void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
- unsigned int value)
-{
- omap_dm_timer_write_reg(timer, OMAP_TIMER_INT_EN_REG, value);
-}
+#else
-unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
+void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
{
- return omap_dm_timer_read_reg(timer, OMAP_TIMER_STAT_REG);
+ static const char *source_timers[] = {
+ "sys_ck",
+ "func_32k_ck",
+ "alt_ck"
+ };
+ struct clk *parent;
+
+ if (source < 0 || source >= 3)
+ return;
+
+ parent = clk_get(NULL, source_timers[source]);
+ clk_disable(timer->fclk);
+ clk_set_parent(timer->fclk, parent);
+ clk_enable(timer->fclk);
+ clk_put(parent);
+
+ /* When the functional clock disappears, too quick writes seem to
+ * cause an abort. */
+ udelay(50);
}
-void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
-{
- omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG, value);
-}
+#endif
-void omap_dm_timer_enable_autoreload(struct omap_dm_timer *timer)
+void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
+ unsigned int load)
{
u32 l;
+
l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
- l |= OMAP_TIMER_CTRL_AR;
+ if (autoreload)
+ l |= OMAP_TIMER_CTRL_AR;
+ else
+ l &= ~OMAP_TIMER_CTRL_AR;
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
}
-void omap_dm_timer_trigger(struct omap_dm_timer *timer)
-{
- omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 1);
-}
-
-void omap_dm_timer_set_trigger(struct omap_dm_timer *timer, unsigned int value)
+void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
+ unsigned int match)
{
u32 l;
l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
- l |= value & 0x3;
+ if (enable)
+ l |= OMAP_TIMER_CTRL_CE;
+ else
+ l &= ~OMAP_TIMER_CTRL_CE;
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
}
-void omap_dm_timer_start(struct omap_dm_timer *timer)
+
+void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
+ int toggle, int trigger)
{
u32 l;
l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
- l |= OMAP_TIMER_CTRL_ST;
+ l &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM |
+ OMAP_TIMER_CTRL_PT | (0x03 << 10));
+ if (def_on)
+ l |= OMAP_TIMER_CTRL_SCPWM;
+ if (toggle)
+ l |= OMAP_TIMER_CTRL_PT;
+ l |= trigger << 10;
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
}
-void omap_dm_timer_stop(struct omap_dm_timer *timer)
+void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)
{
u32 l;
l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
- l &= ~0x1;
+ l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
+ if (prescaler >= 0x00 && prescaler <= 0x07) {
+ l |= OMAP_TIMER_CTRL_PRE;
+ l |= prescaler << 2;
+ }
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
}
-unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
+void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
+ unsigned int value)
{
- return omap_dm_timer_read_reg(timer, OMAP_TIMER_COUNTER_REG);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_INT_EN_REG, value);
}
-void omap_dm_timer_reset_counter(struct omap_dm_timer *timer)
+unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
{
- omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, 0);
+ return omap_dm_timer_read_reg(timer, OMAP_TIMER_STAT_REG);
}
-void omap_dm_timer_set_load(struct omap_dm_timer *timer, unsigned int load)
+void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
{
- omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG, value);
}
-void omap_dm_timer_set_match(struct omap_dm_timer *timer, unsigned int match)
+unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
{
- omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
+ return omap_dm_timer_read_reg(timer, OMAP_TIMER_COUNTER_REG);
}
-void omap_dm_timer_enable_compare(struct omap_dm_timer *timer)
+int omap_dm_timers_active(void)
{
- u32 l;
+ int i;
- l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
- l |= OMAP_TIMER_CTRL_CE;
- omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
-}
+ for (i = 0; i < dm_timer_count; i++) {
+ struct omap_dm_timer *timer;
+ timer = &dm_timers[i];
+ if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) &
+ OMAP_TIMER_CTRL_ST)
+ return 1;
+ }
+ return 0;
+}
-static inline void __dm_timer_init(void)
+int omap_dm_timer_init(void)
{
struct omap_dm_timer *timer;
+ int i;
+
+ if (!(cpu_is_omap16xx() || cpu_is_omap24xx()))
+ return -ENODEV;
spin_lock_init(&dm_timer_lock);
- INIT_LIST_HEAD(&dm_timer_info.unused_timers);
- INIT_LIST_HEAD(&dm_timer_info.reserved_timers);
-
- timer = &dm_timers[0];
- while (timer->base) {
- list_add_tail((struct list_head *)timer, &dm_timer_info.unused_timers);
- omap_dm_timer_reset(timer);
- timer++;
+ for (i = 0; i < dm_timer_count; i++) {
+#ifdef CONFIG_ARCH_OMAP2
+ char clk_name[16];
+#endif
+
+ timer = &dm_timers[i];
+ timer->io_base = (void __iomem *) io_p2v(timer->phys_base);
+#ifdef CONFIG_ARCH_OMAP2
+ sprintf(clk_name, "gpt%d_ick", i + 1);
+ timer->iclk = clk_get(NULL, clk_name);
+ sprintf(clk_name, "gpt%d_fck", i + 1);
+ timer->fclk = clk_get(NULL, clk_name);
+#endif
}
-}
-static int __init omap_dm_timer_init(void)
-{
- if (cpu_is_omap16xx())
- __dm_timer_init();
return 0;
}
-
-arch_initcall(omap_dm_timer_init);
diff --git a/arch/arm/plat-omap/timer32k.c b/arch/arm/plat-omap/timer32k.c
index 3461a6c9665..f028e182215 100644
--- a/arch/arm/plat-omap/timer32k.c
+++ b/arch/arm/plat-omap/timer32k.c
@@ -7,6 +7,7 @@
* Partial timer rewrite and additional dynamic tick timer support by
* Tony Lindgen <tony@atomide.com> and
* Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
+ * OMAP Dual-mode timer framework support by Timo Teras
*
* MPU timer code based on the older MPU timer code for OMAP
* Copyright (C) 2000 RidgeRun, Inc.
@@ -79,18 +80,6 @@ struct sys_timer omap_timer;
#define OMAP1_32K_TIMER_TVR 0x00
#define OMAP1_32K_TIMER_TCR 0x04
-/* 24xx specific defines */
-#define OMAP2_GP_TIMER_BASE 0x48028000
-#define CM_CLKSEL_WKUP 0x48008440
-#define GP_TIMER_TIDR 0x00
-#define GP_TIMER_TISR 0x18
-#define GP_TIMER_TIER 0x1c
-#define GP_TIMER_TCLR 0x24
-#define GP_TIMER_TCRR 0x28
-#define GP_TIMER_TLDR 0x2c
-#define GP_TIMER_TTGR 0x30
-#define GP_TIMER_TSICR 0x40
-
#define OMAP_32K_TICKS_PER_HZ (32768 / HZ)
/*
@@ -102,54 +91,64 @@ struct sys_timer omap_timer;
#define JIFFIES_TO_HW_TICKS(nr_jiffies, clock_rate) \
(((nr_jiffies) * (clock_rate)) / HZ)
+#if defined(CONFIG_ARCH_OMAP1)
+
static inline void omap_32k_timer_write(int val, int reg)
{
- if (cpu_class_is_omap1())
- omap_writew(val, OMAP1_32K_TIMER_BASE + reg);
-
- if (cpu_is_omap24xx())
- omap_writel(val, OMAP2_GP_TIMER_BASE + reg);
+ omap_writew(val, OMAP1_32K_TIMER_BASE + reg);
}
static inline unsigned long omap_32k_timer_read(int reg)
{
- if (cpu_class_is_omap1())
- return omap_readl(OMAP1_32K_TIMER_BASE + reg) & 0xffffff;
+ return omap_readl(OMAP1_32K_TIMER_BASE + reg) & 0xffffff;
+}
- if (cpu_is_omap24xx())
- return omap_readl(OMAP2_GP_TIMER_BASE + reg);
+static inline void omap_32k_timer_start(unsigned long load_val)
+{
+ omap_32k_timer_write(load_val, OMAP1_32K_TIMER_TVR);
+ omap_32k_timer_write(0x0f, OMAP1_32K_TIMER_CR);
}
-/*
- * The 32KHz synchronized timer is an additional timer on 16xx.
- * It is always running.
- */
-static inline unsigned long omap_32k_sync_timer_read(void)
+static inline void omap_32k_timer_stop(void)
{
- return omap_readl(TIMER_32K_SYNCHRONIZED);
+ omap_32k_timer_write(0x0, OMAP1_32K_TIMER_CR);
}
+#define omap_32k_timer_ack_irq()
+
+#elif defined(CONFIG_ARCH_OMAP2)
+
+#include <asm/arch/dmtimer.h>
+
+static struct omap_dm_timer *gptimer;
+
static inline void omap_32k_timer_start(unsigned long load_val)
{
- if (cpu_class_is_omap1()) {
- omap_32k_timer_write(load_val, OMAP1_32K_TIMER_TVR);
- omap_32k_timer_write(0x0f, OMAP1_32K_TIMER_CR);
- }
-
- if (cpu_is_omap24xx()) {
- omap_32k_timer_write(0xffffffff - load_val, GP_TIMER_TCRR);
- omap_32k_timer_write((1 << 1), GP_TIMER_TIER);
- omap_32k_timer_write((1 << 1) | 1, GP_TIMER_TCLR);
- }
+ omap_dm_timer_set_load(gptimer, 1, 0xffffffff - load_val);
+ omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
+ omap_dm_timer_start(gptimer);
}
static inline void omap_32k_timer_stop(void)
{
- if (cpu_class_is_omap1())
- omap_32k_timer_write(0x0, OMAP1_32K_TIMER_CR);
+ omap_dm_timer_stop(gptimer);
+}
- if (cpu_is_omap24xx())
- omap_32k_timer_write(0x0, GP_TIMER_TCLR);
+static inline void omap_32k_timer_ack_irq(void)
+{
+ u32 status = omap_dm_timer_read_status(gptimer);
+ omap_dm_timer_write_status(gptimer, status);
+}
+
+#endif
+
+/*
+ * The 32KHz synchronized timer is an additional timer on 16xx.
+ * It is always running.
+ */
+static inline unsigned long omap_32k_sync_timer_read(void)
+{
+ return omap_readl(TIMER_32K_SYNCHRONIZED);
}
/*
@@ -203,11 +202,7 @@ static irqreturn_t omap_32k_timer_interrupt(int irq, void *dev_id,
write_seqlock_irqsave(&xtime_lock, flags);
- if (cpu_is_omap24xx()) {
- u32 status = omap_32k_timer_read(GP_TIMER_TISR);
- omap_32k_timer_write(status, GP_TIMER_TISR);
- }
-
+ omap_32k_timer_ack_irq();
now = omap_32k_sync_timer_read();
while ((signed long)(now - omap_32k_last_tick)
@@ -269,9 +264,6 @@ static struct irqaction omap_32k_timer_irq = {
.handler = omap_32k_timer_interrupt,
};
-static struct clk * gpt1_ick;
-static struct clk * gpt1_fck;
-
static __init void omap_init_32k_timer(void)
{
#ifdef CONFIG_NO_IDLE_HZ
@@ -280,31 +272,19 @@ static __init void omap_init_32k_timer(void)
if (cpu_class_is_omap1())
setup_irq(INT_OS_TIMER, &omap_32k_timer_irq);
- if (cpu_is_omap24xx())
- setup_irq(37, &omap_32k_timer_irq);
omap_timer.offset = omap_32k_timer_gettimeoffset;
omap_32k_last_tick = omap_32k_sync_timer_read();
/* REVISIT: Check 24xx TIOCP_CFG settings after idle works */
if (cpu_is_omap24xx()) {
- omap_32k_timer_write(0, GP_TIMER_TCLR);
- omap_writel(0, CM_CLKSEL_WKUP); /* 32KHz clock source */
-
- gpt1_ick = clk_get(NULL, "gpt1_ick");
- if (IS_ERR(gpt1_ick))
- printk(KERN_ERR "Could not get gpt1_ick\n");
- else
- clk_enable(gpt1_ick);
-
- gpt1_fck = clk_get(NULL, "gpt1_fck");
- if (IS_ERR(gpt1_fck))
- printk(KERN_ERR "Could not get gpt1_fck\n");
- else
- clk_enable(gpt1_fck);
-
- mdelay(100); /* Wait for clocks to stabilize */
-
- omap_32k_timer_write(0x7, GP_TIMER_TISR);
+ gptimer = omap_dm_timer_request_specific(1);
+ BUG_ON(gptimer == NULL);
+
+ omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_32_KHZ);
+ setup_irq(omap_dm_timer_get_irq(gptimer), &omap_32k_timer_irq);
+ omap_dm_timer_set_int_enable(gptimer,
+ OMAP_TIMER_INT_CAPTURE | OMAP_TIMER_INT_OVERFLOW |
+ OMAP_TIMER_INT_MATCH);
}
omap_32k_timer_start(OMAP_32K_TIMER_TICK_PERIOD);
@@ -317,6 +297,9 @@ static __init void omap_init_32k_timer(void)
*/
static void __init omap_timer_init(void)
{
+#ifdef CONFIG_OMAP_DM_TIMER
+ omap_dm_timer_init();
+#endif
omap_init_32k_timer();
}