[src/trunk]: src/sys/arch/arm/amlogic Add watchdog timer support.

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

details:   https://anonhg.NetBSD.org/src/rev/32a9342a4c1a
branches:  trunk
changeset: 341748:32a9342a4c1a
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sat Nov 21 00:54:57 2015 +0000

description:
Add watchdog timer support.

diffstat:

 sys/arch/arm/amlogic/amlogic_board.c |  59 ++++++++++++++++++++++++++++++++++-
 sys/arch/arm/amlogic/amlogic_io.c    |   5 +-
 sys/arch/arm/amlogic/amlogic_var.h   |   3 +-
 3 files changed, 62 insertions(+), 5 deletions(-)

diffs (138 lines):

diff -r f55fdc3129bf -r 32a9342a4c1a sys/arch/arm/amlogic/amlogic_board.c
--- a/sys/arch/arm/amlogic/amlogic_board.c      Sat Nov 21 00:50:15 2015 +0000
+++ b/sys/arch/arm/amlogic/amlogic_board.c      Sat Nov 21 00:54:57 2015 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: amlogic_board.c,v 1.14 2015/08/08 10:51:40 jmcneill Exp $ */
+/* $NetBSD: amlogic_board.c,v 1.15 2015/11/21 00:54:57 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -29,13 +29,16 @@
 #include "opt_amlogic.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: amlogic_board.c,v 1.14 2015/08/08 10:51:40 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: amlogic_board.c,v 1.15 2015/11/21 00:54:57 jmcneill Exp $");
 
 #define        _ARM32_BUS_DMA_PRIVATE
 #include <sys/param.h>
 #include <sys/bus.h>
 #include <sys/cpu.h>
 #include <sys/device.h>
+#include <sys/wdog.h>
+
+#include <dev/sysmon/sysmonvar.h>
 
 #include <uvm/uvm_extern.h>
 
@@ -46,8 +49,22 @@
 #include <arm/amlogic/amlogic_crureg.h>
 #include <arm/amlogic/amlogic_var.h>
 
+#define AMLOGIC_EE_WDOG_PERIOD_DEFAULT 8
+#define AMLOGIC_EE_WDOG_PERIOD_MAX     8
+#define AMLOGIC_EE_WDOG_TICKS_PER_SEC  7812
+
 bus_space_handle_t amlogic_core_bsh;
 
+static int     amlogic_ee_wdog_setmode(struct sysmon_wdog *);
+static int     amlogic_ee_wdog_tickle(struct sysmon_wdog *);
+
+static struct sysmon_wdog amlogic_ee_wdog = {
+       .smw_name = "EE-watchdog",
+       .smw_setmode = amlogic_ee_wdog_setmode,
+       .smw_tickle = amlogic_ee_wdog_tickle,
+       .smw_period = AMLOGIC_EE_WDOG_PERIOD_DEFAULT
+};
+
 struct arm32_bus_dma_tag amlogic_dma_tag = {
        _BUS_DMAMAP_FUNCS,
        _BUS_DMAMEM_FUNCS,
@@ -223,6 +240,44 @@
 }
 
 void
+amlogic_wdog_init(void)
+{
+       sysmon_wdog_register(&amlogic_ee_wdog);
+}
+
+static int
+amlogic_ee_wdog_setmode(struct sysmon_wdog *smw)
+{
+       if ((smw->smw_mode & WDOG_MODE_MASK) == WDOG_MODE_DISARMED) {
+               CBUS_WRITE(WATCHDOG_RESET_REG, 0);
+               CBUS_SET_CLEAR(WATCHDOG_TC_REG, 0, WATCHDOG_TC_ENABLE);
+               return 0;
+       }
+
+       if (smw->smw_period == WDOG_PERIOD_DEFAULT) {
+               amlogic_ee_wdog.smw_period = AMLOGIC_EE_WDOG_PERIOD_DEFAULT;
+       } else if (smw->smw_period == 0 ||
+                  smw->smw_period > AMLOGIC_EE_WDOG_PERIOD_MAX) {
+               return EINVAL;
+       } else {
+               amlogic_ee_wdog.smw_period = smw->smw_period;
+       }
+       u_int tcnt = amlogic_ee_wdog.smw_period * AMLOGIC_EE_WDOG_TICKS_PER_SEC;
+       CBUS_WRITE(WATCHDOG_RESET_REG, 0);
+       CBUS_WRITE(WATCHDOG_TC_REG, WATCHDOG_TC_CPUS | WATCHDOG_TC_ENABLE |
+           __SHIFTIN(tcnt, WATCHDOG_TC_TCNT));
+
+       return 0;
+}
+
+static int
+amlogic_ee_wdog_tickle(struct sysmon_wdog *smw)
+{
+       CBUS_WRITE(WATCHDOG_RESET_REG, 0);
+       return 0;
+}
+
+void
 amlogic_sdhc_init(void)
 {
        /* enable SDHC clk */
diff -r f55fdc3129bf -r 32a9342a4c1a sys/arch/arm/amlogic/amlogic_io.c
--- a/sys/arch/arm/amlogic/amlogic_io.c Sat Nov 21 00:50:15 2015 +0000
+++ b/sys/arch/arm/amlogic/amlogic_io.c Sat Nov 21 00:54:57 2015 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: amlogic_io.c,v 1.12 2015/08/08 14:01:44 jmcneill Exp $ */
+/* $NetBSD: amlogic_io.c,v 1.13 2015/11/21 00:54:57 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -29,7 +29,7 @@
 #include "opt_amlogic.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: amlogic_io.c,v 1.12 2015/08/08 14:01:44 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: amlogic_io.c,v 1.13 2015/11/21 00:54:57 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -99,6 +99,7 @@
        aprint_naive("\n");
        aprint_normal("\n");
 
+       amlogic_wdog_init();
        amlogic_usbphy_init(0);
        amlogic_usbphy_init(1);
 
diff -r f55fdc3129bf -r 32a9342a4c1a sys/arch/arm/amlogic/amlogic_var.h
--- a/sys/arch/arm/amlogic/amlogic_var.h        Sat Nov 21 00:50:15 2015 +0000
+++ b/sys/arch/arm/amlogic/amlogic_var.h        Sat Nov 21 00:54:57 2015 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: amlogic_var.h,v 1.11 2015/08/04 01:23:07 jmcneill Exp $ */
+/* $NetBSD: amlogic_var.h,v 1.12 2015/11/21 00:54:57 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -59,6 +59,7 @@
 void   amlogic_cpufreq_bootstrap(void);
 void   amlogic_cpufreq_init(void);
 
+void   amlogic_wdog_init(void);
 void   amlogic_usbphy_init(int);
 void   amlogic_eth_init(void);
 void   amlogic_rng_init(void);