diff options
| author | Michael Buesch <mb@bu3sch.de> | 2008-06-20 19:44:02 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-06-27 17:09:16 +0400 |
| commit | 9b839a7453dc7a25dbd367486017648182df541f (patch) | |
| tree | f2b12183594aba5f0e278210239fc41071f05ba8 /drivers/net/wireless/b43 | |
| parent | 9ae705cfd390f9077eec856ea4dff374d166de33 (diff) | |
| download | linux-9b839a7453dc7a25dbd367486017648182df541f.tar.xz | |
b43: Add simple firmware watchdog
This adds a simple firmware watchdog for the opensource firmware.
This will check every 15 seconds, if the firmware zeroed out the watchdog
register. The firmware will do this in its eventloop.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/b43')
| -rw-r--r-- | drivers/net/wireless/b43/b43.h | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/b43/main.c | 15 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h index 532365f5ecef..edcdfa366452 100644 --- a/drivers/net/wireless/b43/b43.h +++ b/drivers/net/wireless/b43/b43.h @@ -441,6 +441,8 @@ enum { #define B43_FWPANIC_DIE 0 /* Firmware died. Don't auto-restart it. */ #define B43_FWPANIC_RESTART 1 /* Firmware died. Schedule a controller reset. */ +/* The firmware register that contains the watchdog counter. */ +#define B43_WATCHDOG_REG 1 /* Device specific rate values. * The actual values defined here are (rate_in_mbps * 2). diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index 69272b9bdb69..c14d522d69e3 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -2807,6 +2807,21 @@ static void b43_periodic_every30sec(struct b43_wldev *dev) static void b43_periodic_every15sec(struct b43_wldev *dev) { struct b43_phy *phy = &dev->phy; + u16 wdr; + + if (dev->fw.opensource) { + /* Check if the firmware is still alive. + * It will reset the watchdog counter to 0 in its idle loop. */ + wdr = b43_shm_read16(dev, B43_SHM_SCRATCH, B43_WATCHDOG_REG); + if (unlikely(wdr)) { + b43err(dev->wl, "Firmware watchdog: The firmware died!\n"); + b43_controller_restart(dev, "Firmware watchdog"); + return; + } else { + b43_shm_write16(dev, B43_SHM_SCRATCH, + B43_WATCHDOG_REG, 1); + } + } if (phy->type == B43_PHYTYPE_G) { //TODO: update_aci_moving_average |