---

yaml --- r: 111103 b: refs/heads/master c: 496a3b5 h: refs/heads/master i: 111101: ea2a8bb 111099: 9df054a 111095: 580c119 111087: c943542 111071: 175f30c 111039: c96d123 110975: 240efb8 110847: b872747 110591: 6c83fc6 v: v3
git-mirror · Oct 11, 2008 · b9bf356 · b9bf356
1 parent 6f63e63
commit b9bf356
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Showing 5 changed files with 73 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d75a40e90e9eb08c2159e719a90a7922dab231d3
+refs/heads/master: 496a3b5c2c188e8af07261792b3d4e6cf1c1dab9
diff --git a/trunk/arch/mips/txx9/generic/setup.c b/trunk/arch/mips/txx9/generic/setup.c
@@ -29,6 +29,7 @@
 #include <asm/r4kcache.h>
 #include <asm/txx9/generic.h>
 #include <asm/txx9/pci.h>
+#include <asm/txx9tmr.h>
 #ifdef CONFIG_CPU_TX49XX
 #include <asm/txx9/tx4938.h>
 #endif
@@ -444,6 +445,20 @@ void __init txx9_wdt_init(unsigned long base)
 	platform_device_register_simple("txx9wdt", -1, &res, 1);
 }
 
+void txx9_wdt_now(unsigned long base)
+{
+	struct txx9_tmr_reg __iomem *tmrptr =
+		ioremap(base, sizeof(struct txx9_tmr_reg));
+	/* disable watch dog timer */
+	__raw_writel(TXx9_TMWTMR_WDIS | TXx9_TMWTMR_TWC, &tmrptr->wtmr);
+	__raw_writel(0, &tmrptr->tcr);
+	/* kick watchdog */
+	__raw_writel(TXx9_TMWTMR_TWIE, &tmrptr->wtmr);
+	__raw_writel(1, &tmrptr->cpra); /* immediate */
+	__raw_writel(TXx9_TMTCR_TCE | TXx9_TMTCR_CCDE | TXx9_TMTCR_TMODE_WDOG,
+		     &tmrptr->tcr);
+}
+
 /* SPI support */
 void __init txx9_spi_init(int busid, unsigned long base, int irq)
 {

diff --git a/trunk/arch/mips/txx9/generic/setup_tx4927.c b/trunk/arch/mips/txx9/generic/setup_tx4927.c
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/param.h>
 #include <linux/mtd/physmap.h>
+#include <asm/reboot.h>
 #include <asm/txx9irq.h>
 #include <asm/txx9tmr.h>
 #include <asm/txx9pio.h>
@@ -23,6 +24,10 @@
 
 static void __init tx4927_wdr_init(void)
 {
+	/* report watchdog reset status */
+	if (____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_WDRST)
+		pr_warning("Watchdog reset detected at 0x%lx\n",
+			   read_c0_errorepc());
 	/* clear WatchDogReset (W1C) */
 	tx4927_ccfg_set(TX4927_CCFG_WDRST);
 	/* do reset on watchdog */
@@ -34,6 +39,27 @@ void __init tx4927_wdt_init(void)
 	txx9_wdt_init(TX4927_TMR_REG(2) & 0xfffffffffULL);
 }
 
+static void tx4927_machine_restart(char *command)
+{
+	local_irq_disable();
+	pr_emerg("Rebooting (with %s watchdog reset)...\n",
+		 (____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_WDREXEN) ?
+		 "external" : "internal");
+	/* clear watchdog status */
+	tx4927_ccfg_set(TX4927_CCFG_WDRST);	/* W1C */
+	txx9_wdt_now(TX4927_TMR_REG(2) & 0xfffffffffULL);
+	while (!(____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_WDRST))
+		;
+	mdelay(10);
+	if (____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_WDREXEN) {
+		pr_emerg("Rebooting (with internal watchdog reset)...\n");
+		/* External WDRST failed.  Do internal watchdog reset */
+		tx4927_ccfg_clear(TX4927_CCFG_WDREXEN);
+	}
+	/* fallback */
+	(*_machine_halt)();
+}
+
 static struct resource tx4927_sdram_resource[4];
 
 void __init tx4927_setup(void)
@@ -169,6 +195,8 @@ void __init tx4927_setup(void)
 	txx9_gpio_init(TX4927_PIO_REG & 0xfffffffffULL, 0, TX4927_NUM_PIO);
 	__raw_writel(0, &tx4927_pioptr->maskcpu);
 	__raw_writel(0, &tx4927_pioptr->maskext);
+
+	_machine_restart = tx4927_machine_restart;
 }
 
 void __init tx4927_time_init(unsigned int tmrnr)

diff --git a/trunk/arch/mips/txx9/generic/setup_tx4938.c b/trunk/arch/mips/txx9/generic/setup_tx4938.c
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/param.h>
 #include <linux/mtd/physmap.h>
+#include <asm/reboot.h>
 #include <asm/txx9irq.h>
 #include <asm/txx9tmr.h>
 #include <asm/txx9pio.h>
@@ -23,6 +24,10 @@
 
 static void __init tx4938_wdr_init(void)
 {
+	/* report watchdog reset status */
+	if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDRST)
+		pr_warning("Watchdog reset detected at 0x%lx\n",
+			   read_c0_errorepc());
 	/* clear WatchDogReset (W1C) */
 	tx4938_ccfg_set(TX4938_CCFG_WDRST);
 	/* do reset on watchdog */
@@ -34,6 +39,27 @@ void __init tx4938_wdt_init(void)
 	txx9_wdt_init(TX4938_TMR_REG(2) & 0xfffffffffULL);
 }
 
+static void tx4938_machine_restart(char *command)
+{
+	local_irq_disable();
+	pr_emerg("Rebooting (with %s watchdog reset)...\n",
+		 (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDREXEN) ?
+		 "external" : "internal");
+	/* clear watchdog status */
+	tx4938_ccfg_set(TX4938_CCFG_WDRST);	/* W1C */
+	txx9_wdt_now(TX4938_TMR_REG(2) & 0xfffffffffULL);
+	while (!(____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDRST))
+		;
+	mdelay(10);
+	if (____raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_WDREXEN) {
+		pr_emerg("Rebooting (with internal watchdog reset)...\n");
+		/* External WDRST failed.  Do internal watchdog reset */
+		tx4938_ccfg_clear(TX4938_CCFG_WDREXEN);
+	}
+	/* fallback */
+	(*_machine_halt)();
+}
+
 static struct resource tx4938_sdram_resource[4];
 static struct resource tx4938_sram_resource;
 
@@ -229,6 +255,8 @@ void __init tx4938_setup(void)
 				   TX4938_CLKCTR_ETH1CKD);
 		}
 	}
+
+	_machine_restart = tx4938_machine_restart;
 }
 
 void __init tx4938_time_init(unsigned int tmrnr)

diff --git a/trunk/include/asm-mips/txx9/generic.h b/trunk/include/asm-mips/txx9/generic.h
@@ -45,6 +45,7 @@ extern int (*txx9_irq_dispatch)(int pending);
 char *prom_getcmdline(void);
 const char *prom_getenv(const char *name);
 void txx9_wdt_init(unsigned long base);
+void txx9_wdt_now(unsigned long base);
 void txx9_spi_init(int busid, unsigned long base, int irq);
 void txx9_ethaddr_init(unsigned int id, unsigned char *ethaddr);
 void txx9_sio_init(unsigned long baseaddr, int irq,