From: Michael Buesch Date: Fri, 20 Jun 2008 15:44:02 +0000 (+0200) Subject: b43: Add simple firmware watchdog X-Git-Tag: v2.6.27-rc1~969^2~254^2~20 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9b839a7453dc7a25dbd367486017648182df541f;p=linux-2.6 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 Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h index 532365f5ec..edcdfa3664 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 69272b9bdb..c14d522d69 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