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-rw-r--r--arch/arm/mach-omap2/timer.c23
-rw-r--r--arch/arm/plat-omap/dmtimer.c32
-rw-r--r--arch/arm/plat-omap/include/plat/dmtimer.h144
3 files changed, 123 insertions, 76 deletions
diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index cf1de7d2630d..69466f388417 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -78,7 +78,7 @@ static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
{
struct clock_event_device *evt = &clockevent_gpt;
- __omap_dm_timer_write_status(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);
+ __omap_dm_timer_write_status(&clkev, OMAP_TIMER_INT_OVERFLOW);
evt->event_handler(evt);
return IRQ_HANDLED;
@@ -93,7 +93,7 @@ static struct irqaction omap2_gp_timer_irq = {
static int omap2_gp_timer_set_next_event(unsigned long cycles,
struct clock_event_device *evt)
{
- __omap_dm_timer_load_start(clkev.io_base, OMAP_TIMER_CTRL_ST,
+ __omap_dm_timer_load_start(&clkev, OMAP_TIMER_CTRL_ST,
0xffffffff - cycles, 1);
return 0;
@@ -104,16 +104,16 @@ static void omap2_gp_timer_set_mode(enum clock_event_mode mode,
{
u32 period;
- __omap_dm_timer_stop(clkev.io_base, 1, clkev.rate);
+ __omap_dm_timer_stop(&clkev, 1, clkev.rate);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
period = clkev.rate / HZ;
period -= 1;
/* Looks like we need to first set the load value separately */
- __omap_dm_timer_write(clkev.io_base, OMAP_TIMER_LOAD_REG,
+ __omap_dm_timer_write(&clkev, OMAP_TIMER_LOAD_REG,
0xffffffff - period, 1);
- __omap_dm_timer_load_start(clkev.io_base,
+ __omap_dm_timer_load_start(&clkev,
OMAP_TIMER_CTRL_AR | OMAP_TIMER_CTRL_ST,
0xffffffff - period, 1);
break;
@@ -189,7 +189,8 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
clk_put(src);
}
}
- __omap_dm_timer_reset(timer->io_base, 1, 1);
+ __omap_dm_timer_init_regs(timer);
+ __omap_dm_timer_reset(timer, 1, 1);
timer->posted = 1;
timer->rate = clk_get_rate(timer->fclk);
@@ -210,7 +211,7 @@ static void __init omap2_gp_clockevent_init(int gptimer_id,
omap2_gp_timer_irq.dev_id = (void *)&clkev;
setup_irq(clkev.irq, &omap2_gp_timer_irq);
- __omap_dm_timer_int_enable(clkev.io_base, OMAP_TIMER_INT_OVERFLOW);
+ __omap_dm_timer_int_enable(&clkev, OMAP_TIMER_INT_OVERFLOW);
clockevent_gpt.mult = div_sc(clkev.rate, NSEC_PER_SEC,
clockevent_gpt.shift);
@@ -251,7 +252,7 @@ static struct omap_dm_timer clksrc;
static DEFINE_CLOCK_DATA(cd);
static cycle_t clocksource_read_cycles(struct clocksource *cs)
{
- return (cycle_t)__omap_dm_timer_read_counter(clksrc.io_base, 1);
+ return (cycle_t)__omap_dm_timer_read_counter(&clksrc, 1);
}
static struct clocksource clocksource_gpt = {
@@ -266,7 +267,7 @@ static void notrace dmtimer_update_sched_clock(void)
{
u32 cyc;
- cyc = __omap_dm_timer_read_counter(clksrc.io_base, 1);
+ cyc = __omap_dm_timer_read_counter(&clksrc, 1);
update_sched_clock(&cd, cyc, (u32)~0);
}
@@ -276,7 +277,7 @@ unsigned long long notrace sched_clock(void)
u32 cyc = 0;
if (clksrc.reserved)
- cyc = __omap_dm_timer_read_counter(clksrc.io_base, 1);
+ cyc = __omap_dm_timer_read_counter(&clksrc, 1);
return cyc_to_sched_clock(&cd, cyc, (u32)~0);
}
@@ -293,7 +294,7 @@ static void __init omap2_gp_clocksource_init(int gptimer_id,
pr_info("OMAP clocksource: GPTIMER%d at %lu Hz\n",
gptimer_id, clksrc.rate);
- __omap_dm_timer_load_start(clksrc.io_base,
+ __omap_dm_timer_load_start(&clksrc,
OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0, 1);
init_sched_clock(&cd, dmtimer_update_sched_clock, 32, clksrc.rate);
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 75a847dd776a..e23b7cf2b219 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -170,7 +170,8 @@ static spinlock_t dm_timer_lock;
*/
static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg)
{
- return __omap_dm_timer_read(timer->io_base, reg, timer->posted);
+ WARN_ON((reg & 0xff) < _OMAP_TIMER_WAKEUP_EN_OFFSET);
+ return __omap_dm_timer_read(timer, reg, timer->posted);
}
/*
@@ -182,15 +183,19 @@ static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg)
static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
u32 value)
{
- __omap_dm_timer_write(timer->io_base, reg, value, timer->posted);
+ WARN_ON((reg & 0xff) < _OMAP_TIMER_WAKEUP_EN_OFFSET);
+ __omap_dm_timer_write(timer, reg, value, timer->posted);
}
static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer)
{
int c;
+ if (!timer->sys_stat)
+ return;
+
c = 0;
- while (!(omap_dm_timer_read_reg(timer, OMAP_TIMER_SYS_STAT_REG) & 1)) {
+ while (!(__raw_readl(timer->sys_stat) & 1)) {
c++;
if (c > 100000) {
printk(KERN_ERR "Timer failed to reset\n");
@@ -219,7 +224,7 @@ static void omap_dm_timer_reset(struct omap_dm_timer *timer)
if (cpu_class_is_omap2())
wakeup = 1;
- __omap_dm_timer_reset(timer->io_base, autoidle, wakeup);
+ __omap_dm_timer_reset(timer, autoidle, wakeup);
timer->posted = 1;
}
@@ -401,7 +406,7 @@ void omap_dm_timer_stop(struct omap_dm_timer *timer)
rate = clk_get_rate(timer->fclk);
#endif
- __omap_dm_timer_stop(timer->io_base, timer->posted, rate);
+ __omap_dm_timer_stop(timer, timer->posted, rate);
}
EXPORT_SYMBOL_GPL(omap_dm_timer_stop);
@@ -466,7 +471,7 @@ void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,
}
l |= OMAP_TIMER_CTRL_ST;
- __omap_dm_timer_load_start(timer->io_base, l, load, timer->posted);
+ __omap_dm_timer_load_start(timer, l, load, timer->posted);
}
EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start);
@@ -519,7 +524,7 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_set_prescaler);
void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
unsigned int value)
{
- __omap_dm_timer_int_enable(timer->io_base, value);
+ __omap_dm_timer_int_enable(timer, value);
}
EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_enable);
@@ -527,7 +532,7 @@ unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
{
unsigned int l;
- l = omap_dm_timer_read_reg(timer, OMAP_TIMER_STAT_REG);
+ l = __raw_readl(timer->irq_stat);
return l;
}
@@ -535,13 +540,13 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_read_status);
void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
{
- __omap_dm_timer_write_status(timer->io_base, value);
+ __omap_dm_timer_write_status(timer, value);
}
EXPORT_SYMBOL_GPL(omap_dm_timer_write_status);
unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
{
- return __omap_dm_timer_read_counter(timer->io_base, timer->posted);
+ return __omap_dm_timer_read_counter(timer, timer->posted);
}
EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter);
@@ -601,6 +606,9 @@ static int __init omap_dm_timer_init(void)
dm_timer_count = omap4_dm_timer_count;
dm_source_names = omap4_dm_source_names;
dm_source_clocks = omap4_dm_source_clocks;
+
+ pr_err("dmtimers disabled for omap4 until hwmod conversion\n");
+ return -ENODEV;
}
if (cpu_class_is_omap2())
@@ -630,8 +638,12 @@ static int __init omap_dm_timer_init(void)
if (sys_timer_reserved & (1 << i)) {
timer->reserved = 1;
timer->posted = 1;
+ continue;
}
#endif
+ omap_dm_timer_enable(timer);
+ __omap_dm_timer_init_regs(timer);
+ omap_dm_timer_disable(timer);
}
return 0;
diff --git a/arch/arm/plat-omap/include/plat/dmtimer.h b/arch/arm/plat-omap/include/plat/dmtimer.h
index eb5d16c60cd9..ad554d36866d 100644
--- a/arch/arm/plat-omap/include/plat/dmtimer.h
+++ b/arch/arm/plat-omap/include/plat/dmtimer.h
@@ -98,12 +98,30 @@ int omap_dm_timers_active(void);
* used by dmtimer.c and sys_timer related code.
*/
-/* register offsets */
-#define _OMAP_TIMER_ID_OFFSET 0x00
-#define _OMAP_TIMER_OCP_CFG_OFFSET 0x10
-#define _OMAP_TIMER_SYS_STAT_OFFSET 0x14
-#define _OMAP_TIMER_STAT_OFFSET 0x18
-#define _OMAP_TIMER_INT_EN_OFFSET 0x1c
+/*
+ * The interrupt registers are different between v1 and v2 ip.
+ * These registers are offsets from timer->iobase.
+ */
+#define OMAP_TIMER_ID_OFFSET 0x00
+#define OMAP_TIMER_OCP_CFG_OFFSET 0x10
+
+#define OMAP_TIMER_V1_SYS_STAT_OFFSET 0x14
+#define OMAP_TIMER_V1_STAT_OFFSET 0x18
+#define OMAP_TIMER_V1_INT_EN_OFFSET 0x1c
+
+#define OMAP_TIMER_V2_IRQSTATUS_RAW 0x24
+#define OMAP_TIMER_V2_IRQSTATUS 0x28
+#define OMAP_TIMER_V2_IRQENABLE_SET 0x2c
+#define OMAP_TIMER_V2_IRQENABLE_CLR 0x30
+
+/*
+ * The functional registers have a different base on v1 and v2 ip.
+ * These registers are offsets from timer->func_base. The func_base
+ * is samae as io_base for v1 and io_base + 0x14 for v2 ip.
+ *
+ */
+#define OMAP_TIMER_V2_FUNC_OFFSET 0x14
+
#define _OMAP_TIMER_WAKEUP_EN_OFFSET 0x20
#define _OMAP_TIMER_CTRL_OFFSET 0x24
#define OMAP_TIMER_CTRL_GPOCFG (1 << 14)
@@ -147,21 +165,6 @@ int omap_dm_timers_active(void);
/* register offsets with the write pending bit encoded */
#define WPSHIFT 16
-#define OMAP_TIMER_ID_REG (_OMAP_TIMER_ID_OFFSET \
- | (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_OCP_CFG_REG (_OMAP_TIMER_OCP_CFG_OFFSET \
- | (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_SYS_STAT_REG (_OMAP_TIMER_SYS_STAT_OFFSET \
- | (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_STAT_REG (_OMAP_TIMER_STAT_OFFSET \
- | (WP_NONE << WPSHIFT))
-
-#define OMAP_TIMER_INT_EN_REG (_OMAP_TIMER_INT_EN_OFFSET \
- | (WP_NONE << WPSHIFT))
-
#define OMAP_TIMER_WAKEUP_EN_REG (_OMAP_TIMER_WAKEUP_EN_OFFSET \
| (WP_NONE << WPSHIFT))
@@ -213,7 +216,14 @@ struct omap_dm_timer {
#ifdef CONFIG_ARCH_OMAP2PLUS
struct clk *iclk, *fclk;
#endif
- void __iomem *io_base;
+ void __iomem *io_base;
+ void __iomem *sys_stat; /* TISTAT timer status */
+ void __iomem *irq_stat; /* TISR/IRQSTATUS interrupt status */
+ void __iomem *irq_ena; /* irq enable */
+ void __iomem *irq_dis; /* irq disable, only on v2 ip */
+ void __iomem *pend; /* write pending */
+ void __iomem *func_base; /* function register base */
+
unsigned long rate;
unsigned reserved:1;
unsigned enabled:1;
@@ -223,35 +233,59 @@ struct omap_dm_timer {
extern u32 sys_timer_reserved;
void omap_dm_timer_prepare(struct omap_dm_timer *timer);
-static inline u32 __omap_dm_timer_read(void __iomem *base, u32 reg,
+static inline u32 __omap_dm_timer_read(struct omap_dm_timer *timer, u32 reg,
int posted)
{
if (posted)
- while (__raw_readl(base + (OMAP_TIMER_WRITE_PEND_REG & 0xff))
- & (reg >> WPSHIFT))
+ while (__raw_readl(timer->pend) & (reg >> WPSHIFT))
cpu_relax();
- return __raw_readl(base + (reg & 0xff));
+ return __raw_readl(timer->func_base + (reg & 0xff));
}
-static inline void __omap_dm_timer_write(void __iomem *base, u32 reg, u32 val,
- int posted)
+static inline void __omap_dm_timer_write(struct omap_dm_timer *timer,
+ u32 reg, u32 val, int posted)
{
if (posted)
- while (__raw_readl(base + (OMAP_TIMER_WRITE_PEND_REG & 0xff))
- & (reg >> WPSHIFT))
+ while (__raw_readl(timer->pend) & (reg >> WPSHIFT))
cpu_relax();
- __raw_writel(val, base + (reg & 0xff));
+ __raw_writel(val, timer->func_base + (reg & 0xff));
+}
+
+static inline void __omap_dm_timer_init_regs(struct omap_dm_timer *timer)
+{
+ u32 tidr;
+
+ /* Assume v1 ip if bits [31:16] are zero */
+ tidr = __raw_readl(timer->io_base);
+ if (!(tidr >> 16)) {
+ timer->sys_stat = timer->io_base +
+ OMAP_TIMER_V1_SYS_STAT_OFFSET;
+ timer->irq_stat = timer->io_base + OMAP_TIMER_V1_STAT_OFFSET;
+ timer->irq_ena = timer->io_base + OMAP_TIMER_V1_INT_EN_OFFSET;
+ timer->irq_dis = 0;
+ timer->pend = timer->io_base + _OMAP_TIMER_WRITE_PEND_OFFSET;
+ timer->func_base = timer->io_base;
+ } else {
+ timer->sys_stat = 0;
+ timer->irq_stat = timer->io_base + OMAP_TIMER_V2_IRQSTATUS;
+ timer->irq_ena = timer->io_base + OMAP_TIMER_V2_IRQENABLE_SET;
+ timer->irq_dis = timer->io_base + OMAP_TIMER_V2_IRQENABLE_CLR;
+ timer->pend = timer->io_base +
+ _OMAP_TIMER_WRITE_PEND_OFFSET +
+ OMAP_TIMER_V2_FUNC_OFFSET;
+ timer->func_base = timer->io_base + OMAP_TIMER_V2_FUNC_OFFSET;
+ }
}
/* Assumes the source clock has been set by caller */
-static inline void __omap_dm_timer_reset(void __iomem *base, int autoidle,
- int wakeup)
+static inline void __omap_dm_timer_reset(struct omap_dm_timer *timer,
+ int autoidle, int wakeup)
{
u32 l;
- l = __omap_dm_timer_read(base, OMAP_TIMER_OCP_CFG_REG, 0);
+ l = __raw_readl(timer->io_base + OMAP_TIMER_OCP_CFG_OFFSET);
l |= 0x02 << 3; /* Set to smart-idle mode */
l |= 0x2 << 8; /* Set clock activity to perserve f-clock on idle */
@@ -261,10 +295,10 @@ static inline void __omap_dm_timer_reset(void __iomem *base, int autoidle,
if (wakeup)
l |= 1 << 2;
- __omap_dm_timer_write(base, OMAP_TIMER_OCP_CFG_REG, l, 0);
+ __raw_writel(l, timer->io_base + OMAP_TIMER_OCP_CFG_OFFSET);
/* Match hardware reset default of posted mode */
- __omap_dm_timer_write(base, OMAP_TIMER_IF_CTRL_REG,
+ __omap_dm_timer_write(timer, OMAP_TIMER_IF_CTRL_REG,
OMAP_TIMER_CTRL_POSTED, 0);
}
@@ -286,18 +320,18 @@ static inline int __omap_dm_timer_set_source(struct clk *timer_fck,
return ret;
}
-static inline void __omap_dm_timer_stop(void __iomem *base, int posted,
- unsigned long rate)
+static inline void __omap_dm_timer_stop(struct omap_dm_timer *timer,
+ int posted, unsigned long rate)
{
u32 l;
- l = __omap_dm_timer_read(base, OMAP_TIMER_CTRL_REG, posted);
+ l = __omap_dm_timer_read(timer, OMAP_TIMER_CTRL_REG, posted);
if (l & OMAP_TIMER_CTRL_ST) {
l &= ~0x1;
- __omap_dm_timer_write(base, OMAP_TIMER_CTRL_REG, l, posted);
+ __omap_dm_timer_write(timer, OMAP_TIMER_CTRL_REG, l, posted);
#ifdef CONFIG_ARCH_OMAP2PLUS
/* Readback to make sure write has completed */
- __omap_dm_timer_read(base, OMAP_TIMER_CTRL_REG, posted);
+ __omap_dm_timer_read(timer, OMAP_TIMER_CTRL_REG, posted);
/*
* Wait for functional clock period x 3.5 to make sure that
* timer is stopped
@@ -307,34 +341,34 @@ static inline void __omap_dm_timer_stop(void __iomem *base, int posted,
}
/* Ack possibly pending interrupt */
- __omap_dm_timer_write(base, OMAP_TIMER_STAT_REG,
- OMAP_TIMER_INT_OVERFLOW, 0);
+ __raw_writel(OMAP_TIMER_INT_OVERFLOW, timer->irq_stat);
}
-static inline void __omap_dm_timer_load_start(void __iomem *base, u32 ctrl,
- unsigned int load, int posted)
+static inline void __omap_dm_timer_load_start(struct omap_dm_timer *timer,
+ u32 ctrl, unsigned int load,
+ int posted)
{
- __omap_dm_timer_write(base, OMAP_TIMER_COUNTER_REG, load, posted);
- __omap_dm_timer_write(base, OMAP_TIMER_CTRL_REG, ctrl, posted);
+ __omap_dm_timer_write(timer, OMAP_TIMER_COUNTER_REG, load, posted);
+ __omap_dm_timer_write(timer, OMAP_TIMER_CTRL_REG, ctrl, posted);
}
-static inline void __omap_dm_timer_int_enable(void __iomem *base,
+static inline void __omap_dm_timer_int_enable(struct omap_dm_timer *timer,
unsigned int value)
{
- __omap_dm_timer_write(base, OMAP_TIMER_INT_EN_REG, value, 0);
- __omap_dm_timer_write(base, OMAP_TIMER_WAKEUP_EN_REG, value, 0);
+ __raw_writel(value, timer->irq_ena);
+ __omap_dm_timer_write(timer, OMAP_TIMER_WAKEUP_EN_REG, value, 0);
}
-static inline unsigned int __omap_dm_timer_read_counter(void __iomem *base,
- int posted)
+static inline unsigned int
+__omap_dm_timer_read_counter(struct omap_dm_timer *timer, int posted)
{
- return __omap_dm_timer_read(base, OMAP_TIMER_COUNTER_REG, posted);
+ return __omap_dm_timer_read(timer, OMAP_TIMER_COUNTER_REG, posted);
}
-static inline void __omap_dm_timer_write_status(void __iomem *base,
+static inline void __omap_dm_timer_write_status(struct omap_dm_timer *timer,
unsigned int value)
{
- __omap_dm_timer_write(base, OMAP_TIMER_STAT_REG, value, 0);
+ __raw_writel(value, timer->irq_stat);
}
#endif /* __ASM_ARCH_DMTIMER_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-20 09:29:29 +0000