ARM: OMAP: Add support for dmtimer v2 ip

The registers are slightly different between v1 and v2 ip that
is available in omap4 and later for some timers.

Add support for v2 ip by mapping the interrupt related registers
separately and adding func_base for the functional registers.

Also disable dmtimer driver features on omap4 for now as
those need the hwmod conversion series to deal with enabling
the timers properly in omap_dm_timer_init.

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Tested-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 22 insertions, 10 deletions

diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index 75a847dd776..e23b7cf2b21 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;