From: Matt Fleming <[email protected]> The revision of the watchdog hardware in Sunrisepoint necessitates a new "version" inside the TCO watchdog driver because some of the register layouts have changed.
Cc: Wim Van Sebroeck <[email protected]> Signed-off-by: Matt Fleming <[email protected]> --- drivers/watchdog/iTCO_wdt.c | 58 ++++++++++++++++++++++++++------------------- 1 file changed, 34 insertions(+), 24 deletions(-) diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c index 9a6e70976f64..17dfbc51b85a 100644 --- a/drivers/watchdog/iTCO_wdt.c +++ b/drivers/watchdog/iTCO_wdt.c @@ -145,58 +145,65 @@ static inline unsigned int ticks_to_seconds(int ticks) return iTCO_wdt_private.iTCO_version == 3 ? ticks : (ticks * 6) / 10; } +static inline u32 no_reboot_bit(void) +{ + u32 enable_bit; + + switch (iTCO_wdt_private.iTCO_version) { + case 3: + enable_bit = 0x00000010; + break; + case 2: + enable_bit = 0x00000020; + break; + default: + enable_bit = 0x00000002; + break; + } + + return enable_bit; +} + static void iTCO_wdt_set_NO_REBOOT_bit(void) { u32 val32; /* Set the NO_REBOOT bit: this disables reboots */ - if (iTCO_wdt_private.iTCO_version == 3) { - val32 = readl(iTCO_wdt_private.gcs_pmc); - val32 |= 0x00000010; - writel(val32, iTCO_wdt_private.gcs_pmc); - } else if (iTCO_wdt_private.iTCO_version == 2) { + if (iTCO_wdt_private.iTCO_version >= 2) { val32 = readl(iTCO_wdt_private.gcs_pmc); - val32 |= 0x00000020; + val32 |= no_reboot_bit(); writel(val32, iTCO_wdt_private.gcs_pmc); } else if (iTCO_wdt_private.iTCO_version == 1) { pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32); - val32 |= 0x00000002; + val32 |= no_reboot_bit(); pci_write_config_dword(iTCO_wdt_private.pdev, 0xd4, val32); } } static int iTCO_wdt_unset_NO_REBOOT_bit(void) { + u32 enable_bit = no_reboot_bit(); int ret = 0; - u32 val32; + u32 val32 = 0; /* Unset the NO_REBOOT bit: this enables reboots */ - if (iTCO_wdt_private.iTCO_version == 3) { - val32 = readl(iTCO_wdt_private.gcs_pmc); - val32 &= 0xffffffef; - writel(val32, iTCO_wdt_private.gcs_pmc); - - val32 = readl(iTCO_wdt_private.gcs_pmc); - if (val32 & 0x00000010) - ret = -EIO; - } else if (iTCO_wdt_private.iTCO_version == 2) { + if (iTCO_wdt_private.iTCO_version >= 2) { val32 = readl(iTCO_wdt_private.gcs_pmc); - val32 &= 0xffffffdf; + val32 &= ~enable_bit; writel(val32, iTCO_wdt_private.gcs_pmc); val32 = readl(iTCO_wdt_private.gcs_pmc); - if (val32 & 0x00000020) - ret = -EIO; } else if (iTCO_wdt_private.iTCO_version == 1) { pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32); - val32 &= 0xfffffffd; + val32 &= ~enable_bit; pci_write_config_dword(iTCO_wdt_private.pdev, 0xd4, val32); pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32); - if (val32 & 0x00000002) - ret = -EIO; } + if (val32 & enable_bit) + ret = -EIO; + return ret; /* returns: 0 = OK, -EIO = Error */ } @@ -503,7 +510,10 @@ static int iTCO_wdt_probe(struct platform_device *dev) pdata->name, pdata->iTCO_version, (u64)TCOBASE); /* Clear out the (probably old) status */ - if (iTCO_wdt_private.iTCO_version == 3) { + if (iTCO_wdt_private.iTCO_version == 4) { + outw(0x0008, TCO1_STS); /* Clear the Time Out Status bit */ + outw(0x0002, TCO2_STS); /* Clear SECOND_TO_STS bit */ + } else if (iTCO_wdt_private.iTCO_version == 3) { outl(0x20008, TCO1_STS); } else { outw(0x0008, TCO1_STS); /* Clear the Time Out Status bit */ -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
