[src/trunk]: src/sys/arch/arm/sunxi sun4i: use Timer 1 instead of Timer 0 for...

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4099a963d518
branches:  trunk
changeset: 827343:4099a963d518
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Tue Oct 24 15:06:23 2017 +0000

description:
sun4i: use Timer 1 instead of Timer 0 for delay, and explicitly enable it

diffstat:

 sys/arch/arm/sunxi/sunxi_platform.c |  27 +++++++++++++++++++++------
 1 files changed, 21 insertions(+), 6 deletions(-)

diffs (58 lines):

diff -r 05b98d09fa43 -r 4099a963d518 sys/arch/arm/sunxi/sunxi_platform.c
--- a/sys/arch/arm/sunxi/sunxi_platform.c       Tue Oct 24 09:11:51 2017 +0000
+++ b/sys/arch/arm/sunxi/sunxi_platform.c       Tue Oct 24 15:06:23 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sunxi_platform.c,v 1.14 2017/10/23 19:36:01 jakllsch Exp $ */
+/* $NetBSD: sunxi_platform.c,v 1.15 2017/10/24 15:06:23 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -31,7 +31,7 @@
 #include "opt_fdt_arm.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sunxi_platform.c,v 1.14 2017/10/23 19:36:01 jakllsch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sunxi_platform.c,v 1.15 2017/10/24 15:06:23 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -64,7 +64,13 @@
 
 #define        SUN4I_TIMER_BASE        0x01c20c00
 #define        SUN4I_TIMER_SIZE        0x90
-#define        SUN4I_TIMER_0_VAL       0x18
+#define        SUN4I_TIMER_1_CTRL      0x20
+#define         SUN4I_TIMER_1_CTRL_CLK_SRC     __BITS(3,2)
+#define         SUN4I_TIMER_1_CTRL_CLK_SRC_OSC24M      1
+#define         SUN4I_TIMER_1_CTRL_RELOAD      __BIT(1)
+#define         SUN4I_TIMER_1_CTRL_EN          __BIT(0)
+#define        SUN4I_TIMER_1_INTV_VALUE 0x24
+#define        SUN4I_TIMER_1_VAL       0x28
 
 #define        SUN4I_WDT_BASE          0x01c20c90
 #define        SUN4I_WDT_SIZE          0x10
@@ -185,12 +191,21 @@
        long ticks = n * incs_per_us;
        uint32_t cur, prev;
 
-       if (bsh == 0)
+       if (bsh == 0) {
                bus_space_map(bst, SUN4I_TIMER_BASE, SUN4I_TIMER_SIZE, 0, &bsh);
 
-       prev = ~bus_space_read_4(bst, bsh, SUN4I_TIMER_0_VAL);
+               /* Enable Timer 1 */
+               bus_space_write_4(bst, bsh, SUN4I_TIMER_1_INTV_VALUE, ~0U);
+               bus_space_write_4(bst, bsh, SUN4I_TIMER_1_CTRL,
+                   SUN4I_TIMER_1_CTRL_EN |
+                   SUN4I_TIMER_1_CTRL_RELOAD |
+                   __SHIFTIN(SUN4I_TIMER_1_CTRL_CLK_SRC_OSC24M,
+                             SUN4I_TIMER_1_CTRL_CLK_SRC));
+       }
+
+       prev = ~bus_space_read_4(bst, bsh, SUN4I_TIMER_1_VAL);
        while (ticks > 0) {
-               cur = ~bus_space_read_4(bst, bsh, SUN4I_TIMER_0_VAL);
+               cur = ~bus_space_read_4(bst, bsh, SUN4I_TIMER_1_VAL);
                if (cur > prev)
                        ticks -= (cur - prev);
                else