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[PATCH 2/2] TXx9 watchdog support for rbhma3100,rbhma4200,rbhma4500

To: linux-mips@linux-mips.org
Subject: [PATCH 2/2] TXx9 watchdog support for rbhma3100,rbhma4200,rbhma4500
From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Sat, 24 Nov 2007 01:20:27 +0900 (JST)
Cc: ralf@linux-mips.org, wim@iguana.be, akpm@linux-foundation.org
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
This patch adds support for txx9wdt driver to rbhma3100, rbhma4200 and
rbhma4500 platform.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
---
Can be applied on current linux-queue tree on linux-mips.org or 2.6.24-rc3-mm1.

 arch/mips/configs/jmr3927_defconfig                |   15 +++++-
 arch/mips/configs/rbhma4200_defconfig              |   15 +++++-
 arch/mips/configs/rbhma4500_defconfig              |   15 +++++-
 arch/mips/jmr3927/rbhma3100/setup.c                |   55 ++++++++++++++++++++
 .../toshiba_rbtx4927/toshiba_rbtx4927_setup.c      |   55 ++++++++++++++++++++
 arch/mips/tx4938/toshiba_rbtx4938/setup.c          |   25 +++++++++
 include/asm-mips/tx4927/tx4927_pci.h               |    1 +
 7 files changed, 178 insertions(+), 3 deletions(-)

diff --git a/arch/mips/configs/jmr3927_defconfig 
b/arch/mips/configs/jmr3927_defconfig
index eb96791..4ace378 100644
--- a/arch/mips/configs/jmr3927_defconfig
+++ b/arch/mips/configs/jmr3927_defconfig
@@ -464,7 +464,6 @@ CONFIG_SERIAL_TXX9_STDSERIAL=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -482,6 +481,20 @@ CONFIG_DEVPORT=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=y
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/configs/rbhma4200_defconfig 
b/arch/mips/configs/rbhma4200_defconfig
index 9383a59..a67c698 100644
--- a/arch/mips/configs/rbhma4200_defconfig
+++ b/arch/mips/configs/rbhma4200_defconfig
@@ -431,7 +431,6 @@ CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -449,6 +448,20 @@ CONFIG_DEVPORT=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=m
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/configs/rbhma4500_defconfig 
b/arch/mips/configs/rbhma4500_defconfig
index d1b56cc..ebc8ad4 100644
--- a/arch/mips/configs/rbhma4500_defconfig
+++ b/arch/mips/configs/rbhma4500_defconfig
@@ -450,7 +450,6 @@ CONFIG_UNIX98_PTYS=y
 CONFIG_LEGACY_PTYS=y
 CONFIG_LEGACY_PTY_COUNT=256
 # CONFIG_IPMI_HANDLER is not set
-# CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_RTC is not set
 # CONFIG_R3964 is not set
@@ -479,6 +478,20 @@ CONFIG_SPI_AT25=y
 # CONFIG_W1 is not set
 # CONFIG_POWER_SUPPLY is not set
 # CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_TXX9_WDT=m
+
+#
+# PCI-based Watchdog Cards
+#
+# CONFIG_PCIPCWATCHDOG is not set
+# CONFIG_WDTPCI is not set
 
 #
 # Multifunction device drivers
diff --git a/arch/mips/jmr3927/rbhma3100/setup.c 
b/arch/mips/jmr3927/rbhma3100/setup.c
index 75cfe65..c886d80 100644
--- a/arch/mips/jmr3927/rbhma3100/setup.c
+++ b/arch/mips/jmr3927/rbhma3100/setup.c
@@ -35,6 +35,7 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 #ifdef CONFIG_SERIAL_TXX9
 #include <linux/serial_core.h>
 #endif
@@ -233,6 +234,8 @@ static void __init tx3927_setup(void)
        tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_BEOW;
        /* Disable PCI snoop */
        tx3927_ccfgptr->ccfg &= ~TX3927_CCFG_PSNP;
+       /* do reset on watchdog */
+       tx3927_ccfgptr->ccfg |= TX3927_CCFG_WR;
 
 #ifdef DO_WRITE_THROUGH
        /* Enable PCI SNOOP - with write through only */
@@ -383,3 +386,55 @@ static int __init jmr3927_rtc_init(void)
        return IS_ERR(dev) ? PTR_ERR(dev) : 0;
 }
 device_initcall(jmr3927_rtc_init);
+
+/* Watchdog support */
+
+static int __init txx9_wdt_init(unsigned long base)
+{
+       struct resource res = {
+               .start  = base,
+               .end    = base + 0x100 - 1,
+               .flags  = IORESOURCE_MEM,
+       };
+       struct platform_device *dev =
+               platform_device_register_simple("txx9wdt", -1, &res, 1);
+       return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+static int __init jmr3927_wdt_init(void)
+{
+       return txx9_wdt_init(TX3927_TMR_REG(2));
+}
+device_initcall(jmr3927_wdt_init);
+
+/* Minimum CLK support */
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+       if (!strcmp(id, "imbus_clk"))
+               return (struct clk *)JMR3927_IMCLK;
+       return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+       return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+       return (unsigned long)clk;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
diff --git a/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c 
b/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
index c29a528..e466e5e 100644
--- a/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
+++ b/arch/mips/tx4927/toshiba_rbtx4927/toshiba_rbtx4927_setup.c
@@ -50,6 +50,7 @@
 #include <linux/pci.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
+#include <linux/clk.h>
 
 #include <asm/bootinfo.h>
 #include <asm/io.h>
@@ -803,6 +804,8 @@ void __init plat_mem_setup(void)
                }
 
        /* CCFG */
+       /* do reset on watchdog */
+       tx4927_ccfgptr->ccfg |= TX4927_CCFG_WR;
        /* enable Timeout BusError */
        if (tx4927_ccfg_toeon)
                tx4927_ccfgptr->ccfg |= TX4927_CCFG_TOE;
@@ -944,3 +947,55 @@ static int __init rbtx4927_ne_init(void)
        return IS_ERR(dev) ? PTR_ERR(dev) : 0;
 }
 device_initcall(rbtx4927_ne_init);
+
+/* Watchdog support */
+
+static int __init txx9_wdt_init(unsigned long base)
+{
+       struct resource res = {
+               .start  = base,
+               .end    = base + 0x100 - 1,
+               .flags  = IORESOURCE_MEM,
+       };
+       struct platform_device *dev =
+               platform_device_register_simple("txx9wdt", -1, &res, 1);
+       return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+static int __init rbtx4927_wdt_init(void)
+{
+       return txx9_wdt_init(TX4927_TMR_REG(2) & 0xfffffffffULL);
+}
+device_initcall(rbtx4927_wdt_init);
+
+/* Minimum CLK support */
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+       if (!strcmp(id, "imbus_clk"))
+               return (struct clk *)50000000;
+       return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL(clk_get);
+
+int clk_enable(struct clk *clk)
+{
+       return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+       return (unsigned long)clk;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void clk_put(struct clk *clk)
+{
+}
+EXPORT_SYMBOL(clk_put);
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/setup.c 
b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
index d13af99..47a9c17 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/setup.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
@@ -724,6 +724,8 @@ void __init tx4938_board_setup(void)
        /* CCFG */
        /* clear WatchDogReset,BusErrorOnWrite flag (W1C) */
        tx4938_ccfgptr->ccfg |= TX4938_CCFG_WDRST | TX4938_CCFG_BEOW;
+       /* do reset on watchdog */
+       tx4938_ccfgptr->ccfg |= TX4938_CCFG_WR;
        /* clear PCIC1 reset */
        if (tx4938_ccfgptr->clkctr & TX4938_CLKCTR_PCIC1RST)
                tx4938_ccfgptr->clkctr &= ~TX4938_CLKCTR_PCIC1RST;
@@ -1121,12 +1123,35 @@ static int __init rbtx4938_spi_init(void)
 }
 arch_initcall(rbtx4938_spi_init);
 
+/* Watchdog support */
+
+static int __init txx9_wdt_init(unsigned long base)
+{
+       struct resource res = {
+               .start  = base,
+               .end    = base + 0x100 - 1,
+               .flags  = IORESOURCE_MEM,
+               .parent = &tx4938_reg_resource,
+       };
+       struct platform_device *dev =
+               platform_device_register_simple("txx9wdt", -1, &res, 1);
+       return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+static int __init rbtx4938_wdt_init(void)
+{
+       return txx9_wdt_init(TX4938_TMR_REG(2) & 0xfffffffffULL);
+}
+device_initcall(rbtx4938_wdt_init);
+
 /* Minimum CLK support */
 
 struct clk *clk_get(struct device *dev, const char *id)
 {
        if (!strcmp(id, "spi-baseclk"))
                return (struct clk *)(txx9_gbus_clock / 2 / 4);
+       if (!strcmp(id, "imbus_clk"))
+               return (struct clk *)(txx9_gbus_clock / 2);
        return ERR_PTR(-ENOENT);
 }
 EXPORT_SYMBOL(clk_get);
diff --git a/include/asm-mips/tx4927/tx4927_pci.h 
b/include/asm-mips/tx4927/tx4927_pci.h
index 3f1e470..0be77df 100644
--- a/include/asm-mips/tx4927/tx4927_pci.h
+++ b/include/asm-mips/tx4927/tx4927_pci.h
@@ -9,6 +9,7 @@
 #define __ASM_TX4927_TX4927_PCI_H
 
 #define TX4927_CCFG_TOE 0x00004000
+#define TX4927_CCFG_WR 0x00008000
 #define TX4927_CCFG_TINTDIS    0x01000000
 
 #define TX4927_PCIMEM      0x08000000




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