imx233: clean timrot a bit

Change-Id: Ic803a6b5c93978cd3246e553579ac8a1ba35e191

firmware/target/arm/imx233/icoll-imx233.c

@@ -23,6 +23,7 @@
 #include "rtc-imx233.h"
 #include "kernel-imx233.h"
 #include "string.h"
+#include "timrot-imx233.h"
 
 #define default_interrupt(name) \
     extern __attribute__((weak, alias("UIRQ"))) void name(void)
@@ -153,7 +154,7 @@ void irq_handler(void)
     int irq_nr = (HW_ICOLL_VECTOR - HW_ICOLL_VBASE) / 4;
     if(irq_count[irq_nr]++ > IRQ_STORM_THRESHOLD)
         panicf("IRQ %d: storm detected", irq_nr);
-    if(irq_nr == INT_SRC_TIMER(TICK_TIMER_NR))
+    if(irq_nr == INT_SRC_TIMER(TIMER_TICK))
         do_irq_stat();
     (*(isr_t *)HW_ICOLL_VECTOR)();
     /* acknowledge completion of IRQ (all use the same priority 0) */

firmware/target/arm/imx233/kernel-imx233.c

@@ -32,7 +32,7 @@ static void tick_timer(void)
 void tick_start(unsigned int interval_in_ms)
 {
     /* use the 1-kHz XTAL clock source */
-    imx233_setup_timer(TICK_TIMER_NR, true, interval_in_ms,
+    imx233_timrot_setup(TIMER_TICK, true, interval_in_ms,
         BV_TIMROT_TIMCTRLn_SELECT__1KHZ_XTAL, BV_TIMROT_TIMCTRLn_PRESCALE__DIV_BY_1,
         false, &tick_timer);
 }

firmware/target/arm/imx233/kernel-imx233.h

@@ -23,8 +23,6 @@
 
 #include "kernel.h"
 
-#define TICK_TIMER_NR   0
-
 /* The i.MX233 uses in several places virtual channels to multiplex the work.
  * To arbiter the use of the different channels, we use a simple channel arbiter
  * based on a semaphore to count the number of channels in use, and a bitmask

firmware/target/arm/imx233/timer-imx233.c

@@ -22,8 +22,6 @@
 #include "timrot-imx233.h"
 #include "timer.h"
 
-#define USER_TIMER_NR   1
-
 static long timer_cycles = 0;
 
 static void timer_fn(void)
@@ -49,7 +47,7 @@ bool timer_set(long cycles, bool start)
 
 bool timer_start(IF_COP_VOID(int core))
 {
-    imx233_setup_timer(USER_TIMER_NR, true, timer_cycles,
+    imx233_timrot_setup(TIMER_USER, true, timer_cycles,
         BV_TIMROT_TIMCTRLn_SELECT__32KHZ_XTAL, BV_TIMROT_TIMCTRLn_PRESCALE__DIV_BY_1,
         false, &timer_fn);
     return true;
@@ -57,6 +55,6 @@ bool timer_start(IF_COP_VOID(int core))
 
 void timer_stop(void)
 {
-    imx233_setup_timer(USER_TIMER_NR, false, 0, BV_TIMROT_TIMCTRLn_SELECT__NEVER_TICK,
+    imx233_timrot_setup(TIMER_USER, false, 0, BV_TIMROT_TIMCTRLn_SELECT__NEVER_TICK,
         BV_TIMROT_TIMCTRLn_PRESCALE__DIV_BY_1, false, NULL);
 }

firmware/target/arm/imx233/timrot-imx233.c

@@ -20,8 +20,9 @@
  ****************************************************************************/
 #include "timrot-imx233.h"
 #include "clkctrl-imx233.h"
+#include "string.h"
 
-imx233_timer_fn_t timer_fns[4];
+static imx233_timer_fn_t timer_fns[4];
 
 #define define_timer_irq(nr) \
 void INT_TIMER##nr(void) \
@@ -36,28 +37,37 @@ define_timer_irq(1)
 define_timer_irq(2)
 define_timer_irq(3)
 
-void imx233_setup_timer(unsigned timer_nr, bool reload, unsigned count,
+void imx233_timrot_setup(unsigned timer_nr, bool reload, unsigned count,
     unsigned src, unsigned prescale, bool polarity, imx233_timer_fn_t fn)
 {
     int oldstatus = disable_interrupt_save(IRQ_FIQ_STATUS);
     /* only enable interrupt if function is set */
     bool irq = fn != NULL;
-
     timer_fns[timer_nr] = fn;
 
-    HW_TIMROT_TIMCTRLn(timer_nr) = BF_OR6(TIMROT_TIMCTRLn, SELECT(src),
-        PRESCALE(prescale), POLARITY(polarity), RELOAD(reload), IRQ(irq),
-        IRQ_EN(irq));
-
     /* manual says count - 1 for reload timers */
-    HW_TIMROT_TIMCOUNTn(timer_nr) = reload ? count - 1 : reload;
+    HW_TIMROT_TIMCTRLn(timer_nr) = BF_OR7(TIMROT_TIMCTRLn, SELECT(src),
+        PRESCALE(prescale), POLARITY(polarity), RELOAD(reload), IRQ(irq),
+        IRQ_EN(irq), UPDATE(1));
     imx233_icoll_enable_interrupt(INT_SRC_TIMER(timer_nr), irq);
-    /* finally update */
+    HW_TIMROT_TIMCOUNTn(timer_nr) = reload ? count - 1 : count;
-    BF_SETn(TIMROT_TIMCTRLn, timer_nr, UPDATE);
 
     restore_interrupt(oldstatus);
 }
 
+struct imx233_timrot_info_t imx233_timrot_get_info(unsigned timer_nr)
+{
+    struct imx233_timrot_info_t info;
+    memset(&info, 0, sizeof(info));
+    info.src = BF_RDn(TIMROT_TIMCTRLn, timer_nr, SELECT);
+    info.prescale = BF_RDn(TIMROT_TIMCTRLn, timer_nr, PRESCALE);
+    info.reload = BF_RDn(TIMROT_TIMCTRLn, timer_nr, RELOAD);
+    info.polarity = BF_RDn(TIMROT_TIMCTRLn, timer_nr, POLARITY);
+    info.fixed_count = BF_RDn(TIMROT_TIMCOUNTn, timer_nr, FIXED_COUNT);
+    info.run_count = BF_RDn(TIMROT_TIMCOUNTn, timer_nr, RUNNING_COUNT);
+    return info;
+}
+
 void imx233_timrot_init(void)
 {
     imx233_reset_block(&HW_TIMROT_ROTCTRL);

firmware/target/arm/imx233/timrot-imx233.h

@@ -26,10 +26,28 @@
 
 #include "regs/regs-timrot.h"
 
+/* list of timers */
+enum
+{
+    TIMER_TICK, /* for tick task */
+    TIMER_USER, /* for user timer */
+};
+
+struct imx233_timrot_info_t
+{
+    unsigned fixed_count, run_count;
+    unsigned src;
+    unsigned prescale;
+    bool reload;
+    bool polarity;
+    bool irqen;
+};
+
 typedef void (*imx233_timer_fn_t)(void);
 
 void imx233_timrot_init(void);
-void imx233_setup_timer(unsigned timer_nr, bool reload, unsigned count,
+void imx233_timrot_setup(unsigned timer_nr, bool reload, unsigned count,
     unsigned src, unsigned prescale, bool polarity, imx233_timer_fn_t fn);
+struct imx233_timrot_info_t imx233_timrot_get_info(unsigned timer_nr);
 
 #endif /* TIMROT_IMX233_H */