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Add support for AMD FCH watchdog timers.

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MFC after:	2 weeks
This commit is contained in:
Alexander Motin 2016-03-29 12:19:46 +00:00
parent 43a623c82f
commit bc8b0193a6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=297386
2 changed files with 15 additions and 11 deletions
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6
share/man/man4/amdsbwd.4
View File

@ -25,12 +25,12 @@
.\"
.\" $FreeBSD$
.\"
.Dd June 7, 2011
.Dd March 29, 2016
.Dt AMDSBWD 4
.Os
.Sh NAME
.Nm amdsbwd
.Nd device driver for the AMD SB600/SB7xx/SB8xx watchdog timers
.Nd device driver for the AMD southbridge watchdog timers
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following line in your
@ -51,7 +51,7 @@ The
driver provides
.Xr watchdog 4
support for the watchdog timers present on
AMD SB600, SB7xx and SB8xx southbridges.
AMD SB600, SB7xx, SB8xx and SB9xx southbridges and Axx FCHs.
.Sh SEE ALSO
.Xr watchdog 4 ,
.Xr watchdog 8 ,

20
sys/dev/amdsbwd/amdsbwd.c
View File

@ -106,6 +106,8 @@ __FBSDID("$FreeBSD$");
/* SB7xx RRG 2.3.1.1, SB600 RRG 2.3.1.1, SB8xx RRG 2.3.1. */
#define AMDSB_SMBUS_DEVID 0x43851002
#define AMDSB8_SMBUS_REVID 0x40
#define AMDHUDSON_SMBUS_DEVID 0x780b1022
#define AMDKERNCZ_SMBUS_DEVID 0x790b1022
#define amdsbwd_verbose_printf(dev, ...) \
do { \
@ -279,7 +281,9 @@ amdsbwd_identify(driver_t *driver, device_t parent)
smb_dev = pci_find_bsf(0, 20, 0);
if (smb_dev == NULL)
return;
if (pci_get_devid(smb_dev) != AMDSB_SMBUS_DEVID)
if (pci_get_devid(smb_dev) != AMDSB_SMBUS_DEVID &&
pci_get_devid(smb_dev) != AMDHUDSON_SMBUS_DEVID &&
pci_get_devid(smb_dev) != AMDKERNCZ_SMBUS_DEVID)
return;
child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "amdsbwd", -1);
@ -309,10 +313,12 @@ amdsbwd_probe_sb7xx(device_t dev, struct resource *pmres, uint32_t *addr)
*addr <<= 8;
*addr |= pmio_read(pmres, AMDSB_PM_WDT_BASE_MSB - i);
}
*addr &= ~0x07u;
/* Set watchdog timer tick to 1s. */
val = pmio_read(pmres, AMDSB_PM_WDT_CTRL);
val &= ~AMDSB_WDT_RES_MASK;
val |= AMDSB_WDT_RES_10MS;
val |= AMDSB_WDT_RES_1S;
pmio_write(pmres, AMDSB_PM_WDT_CTRL, val);
/* Enable watchdog device (in stopped state). */
@ -372,7 +378,7 @@ amdsbwd_probe_sb8xx(device_t dev, struct resource *pmres, uint32_t *addr)
val = pmio_read(pmres, AMDSB8_PM_WDT_EN);
device_printf(dev, "AMDSB8_PM_WDT_EN value = %#02x\n", val);
#endif
device_set_desc(dev, "AMD SB8xx Watchdog Timer");
device_set_desc(dev, "AMD SB8xx/SB9xx/Axx Watchdog Timer");
}
static int
@ -404,7 +410,8 @@ amdsbwd_probe(device_t dev)
smb_dev = pci_find_bsf(0, 20, 0);
KASSERT(smb_dev != NULL, ("can't find SMBus PCI device\n"));
if (pci_get_revid(smb_dev) < AMDSB8_SMBUS_REVID)
if (pci_get_devid(smb_dev) == AMDSB_SMBUS_DEVID &&
pci_get_revid(smb_dev) < AMDSB8_SMBUS_REVID)
amdsbwd_probe_sb7xx(dev, res, &addr);
else
amdsbwd_probe_sb8xx(dev, res, &addr);
@ -440,10 +447,7 @@ amdsbwd_attach_sb(device_t dev, struct amdsbwd_softc *sc)
smb_dev = pci_find_bsf(0, 20, 0);
KASSERT(smb_dev != NULL, ("can't find SMBus PCI device\n"));
if (pci_get_revid(smb_dev) < AMDSB8_SMBUS_REVID)
sc->ms_per_tick = 10;
else
sc->ms_per_tick = 1000;
sc->ms_per_tick = 1000;
sc->res_ctrl = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->rid_ctrl, RF_ACTIVE);