diff options
author | Guenter Roeck <linux@roeck-us.net> | 2017-12-24 13:04:06 -0800 |
---|---|---|
committer | Wim Van Sebroeck <wim@iguana.be> | 2018-01-21 12:56:34 +0100 |
commit | 2b750cffe1ed05c9001d9524b5815e1f50461a44 (patch) | |
tree | ddb343ca3dacd51ee23eaf6453b58566d991d644 /drivers/watchdog/sp5100_tco.c | |
parent | 1ff688209e2ed23f699269b9733993e2ce123fd2 (diff) | |
download | op-kernel-dev-2b750cffe1ed05c9001d9524b5815e1f50461a44.zip op-kernel-dev-2b750cffe1ed05c9001d9524b5815e1f50461a44.tar.gz |
watchdog: sp5100_tco: Always use SP5100_IO_PM_{INDEX_REG,DATA_REG}
SP5100_IO_PM_INDEX_REG and SB800_IO_PM_INDEX_REG are used inconsistently
and define the same value. Just use SP5100_IO_PM_INDEX_REG throughout.
Do the same for SP5100_IO_PM_DATA_REG and SB800_IO_PM_DATA_REG.
Use helper functions to access the indexed registers.
Cc: Zoltán Böszörményi <zboszor@pr.hu>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/sp5100_tco.c')
-rw-r--r-- | drivers/watchdog/sp5100_tco.c | 94 |
1 files changed, 49 insertions, 45 deletions
diff --git a/drivers/watchdog/sp5100_tco.c b/drivers/watchdog/sp5100_tco.c index 028618c..05f9d27 100644 --- a/drivers/watchdog/sp5100_tco.c +++ b/drivers/watchdog/sp5100_tco.c @@ -48,7 +48,6 @@ static u32 tcobase_phys; static u32 tco_wdt_fired; static void __iomem *tcobase; -static unsigned int pm_iobase; static DEFINE_SPINLOCK(tco_lock); /* Guards the hardware */ static unsigned long timer_alive; static char tco_expect_close; @@ -132,25 +131,38 @@ static int tco_timer_set_heartbeat(int t) return 0; } -static void tco_timer_enable(void) +static u8 sp5100_tco_read_pm_reg8(u8 index) +{ + outb(index, SP5100_IO_PM_INDEX_REG); + return inb(SP5100_IO_PM_DATA_REG); +} + +static void sp5100_tco_update_pm_reg8(u8 index, u8 reset, u8 set) { - int val; + u8 val; + outb(index, SP5100_IO_PM_INDEX_REG); + val = inb(SP5100_IO_PM_DATA_REG); + val &= reset; + val |= set; + outb(val, SP5100_IO_PM_DATA_REG); +} + +static void tco_timer_enable(void) +{ if (!tco_has_sp5100_reg_layout(sp5100_tco_pci)) { /* For SB800 or later */ /* Set the Watchdog timer resolution to 1 sec */ - outb(SB800_PM_WATCHDOG_CONFIG, SB800_IO_PM_INDEX_REG); - val = inb(SB800_IO_PM_DATA_REG); - val |= SB800_PM_WATCHDOG_SECOND_RES; - outb(val, SB800_IO_PM_DATA_REG); + sp5100_tco_update_pm_reg8(SB800_PM_WATCHDOG_CONFIG, + 0xff, SB800_PM_WATCHDOG_SECOND_RES); /* Enable watchdog decode bit and watchdog timer */ - outb(SB800_PM_WATCHDOG_CONTROL, SB800_IO_PM_INDEX_REG); - val = inb(SB800_IO_PM_DATA_REG); - val |= SB800_PCI_WATCHDOG_DECODE_EN; - val &= ~SB800_PM_WATCHDOG_DISABLE; - outb(val, SB800_IO_PM_DATA_REG); + sp5100_tco_update_pm_reg8(SB800_PM_WATCHDOG_CONTROL, + ~SB800_PM_WATCHDOG_DISABLE, + SB800_PCI_WATCHDOG_DECODE_EN); } else { + u32 val; + /* For SP5100 or SB7x0 */ /* Enable watchdog decode bit */ pci_read_config_dword(sp5100_tco_pci, @@ -164,11 +176,9 @@ static void tco_timer_enable(void) val); /* Enable Watchdog timer and set the resolution to 1 sec */ - outb(SP5100_PM_WATCHDOG_CONTROL, SP5100_IO_PM_INDEX_REG); - val = inb(SP5100_IO_PM_DATA_REG); - val |= SP5100_PM_WATCHDOG_SECOND_RES; - val &= ~SP5100_PM_WATCHDOG_DISABLE; - outb(val, SP5100_IO_PM_DATA_REG); + sp5100_tco_update_pm_reg8(SP5100_PM_WATCHDOG_CONTROL, + ~SP5100_PM_WATCHDOG_DISABLE, + SP5100_PM_WATCHDOG_SECOND_RES); } } @@ -321,6 +331,17 @@ static const struct pci_device_id sp5100_tco_pci_tbl[] = { }; MODULE_DEVICE_TABLE(pci, sp5100_tco_pci_tbl); +static u8 sp5100_tco_read_pm_reg32(u8 index) +{ + u32 val = 0; + int i; + + for (i = 3; i >= 0; i--) + val = (val << 8) + sp5100_tco_read_pm_reg8(index + i); + + return val; +} + /* * Init & exit routines */ @@ -329,7 +350,7 @@ static unsigned char sp5100_tco_setupdevice(void) struct pci_dev *dev = NULL; const char *dev_name = NULL; u32 val; - u32 index_reg, data_reg, base_addr; + u8 base_addr; /* Match the PCI device */ for_each_pci_dev(dev) { @@ -351,35 +372,25 @@ static unsigned char sp5100_tco_setupdevice(void) */ if (tco_has_sp5100_reg_layout(sp5100_tco_pci)) { dev_name = SP5100_DEVNAME; - index_reg = SP5100_IO_PM_INDEX_REG; - data_reg = SP5100_IO_PM_DATA_REG; base_addr = SP5100_PM_WATCHDOG_BASE; } else { dev_name = SB800_DEVNAME; - index_reg = SB800_IO_PM_INDEX_REG; - data_reg = SB800_IO_PM_DATA_REG; base_addr = SB800_PM_WATCHDOG_BASE; } /* Request the IO ports used by this driver */ - pm_iobase = SP5100_IO_PM_INDEX_REG; - if (!request_region(pm_iobase, SP5100_PM_IOPORTS_SIZE, dev_name)) { - pr_err("I/O address 0x%04x already in use\n", pm_iobase); + if (!request_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE, + dev_name)) { + pr_err("I/O address 0x%04x already in use\n", + SP5100_IO_PM_INDEX_REG); goto exit; } /* * First, Find the watchdog timer MMIO address from indirect I/O. + * Low three bits of BASE are reserved. */ - outb(base_addr+3, index_reg); - val = inb(data_reg); - outb(base_addr+2, index_reg); - val = val << 8 | inb(data_reg); - outb(base_addr+1, index_reg); - val = val << 8 | inb(data_reg); - outb(base_addr+0, index_reg); - /* Low three bits of BASE are reserved */ - val = val << 8 | (inb(data_reg) & 0xf8); + val = sp5100_tco_read_pm_reg32(base_addr) & 0xfffffff8; pr_debug("Got 0x%04x from indirect I/O\n", val); @@ -400,14 +411,7 @@ static unsigned char sp5100_tco_setupdevice(void) SP5100_SB_RESOURCE_MMIO_BASE, &val); } else { /* Read SBResource_MMIO from AcpiMmioEn(PM_Reg: 24h) */ - outb(SB800_PM_ACPI_MMIO_EN+3, SB800_IO_PM_INDEX_REG); - val = inb(SB800_IO_PM_DATA_REG); - outb(SB800_PM_ACPI_MMIO_EN+2, SB800_IO_PM_INDEX_REG); - val = val << 8 | inb(SB800_IO_PM_DATA_REG); - outb(SB800_PM_ACPI_MMIO_EN+1, SB800_IO_PM_INDEX_REG); - val = val << 8 | inb(SB800_IO_PM_DATA_REG); - outb(SB800_PM_ACPI_MMIO_EN+0, SB800_IO_PM_INDEX_REG); - val = val << 8 | inb(SB800_IO_PM_DATA_REG); + val = sp5100_tco_read_pm_reg32(SB800_PM_ACPI_MMIO_EN); } /* The SBResource_MMIO is enabled and mapped memory space? */ @@ -470,7 +474,7 @@ setup_wdt: unreg_mem_region: release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE); unreg_region: - release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE); + release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE); exit: return 0; } @@ -517,7 +521,7 @@ static int sp5100_tco_init(struct platform_device *dev) exit: iounmap(tcobase); release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE); - release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE); + release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE); return ret; } @@ -531,7 +535,7 @@ static void sp5100_tco_cleanup(void) misc_deregister(&sp5100_tco_miscdev); iounmap(tcobase); release_mem_region(tcobase_phys, SP5100_WDT_MEM_MAP_SIZE); - release_region(pm_iobase, SP5100_PM_IOPORTS_SIZE); + release_region(SP5100_IO_PM_INDEX_REG, SP5100_PM_IOPORTS_SIZE); } static int sp5100_tco_remove(struct platform_device *dev) |