brcmfmac: Fix brcmf_chip_ai_coredisable not applying reset bits to BCMA_IOCTL

brcmfmac has been broken on my cubietruck with a BCM43362:

brcmfmac: brcmf_chip_recognition: found AXI chip: BCM43362, rev=1
brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0:
        Apr 22 2013 14:50:00 version 5.90.195.89.6 FWID 01-b30a427d

since commit 53036261033: "brcmfmac: update core reset and disable routines".

The problem is that since this commit brcmf_chip_ai_resetcore no longer sets
BCMA_IOCTL itself before bringing the core out of reset, instead relying on
brcmf_chip_ai_coredisable to do so. But brcmf_chip_ai_coredisable is a nop
of the chip is already in reset. This patch modifies brcmf_chip_ai_coredisable
to always set BCMA_IOCTL even if the core is already in reset.

This fixes brcmfmac hanging in firmware loading on my board.

Cc: stable@vger.kernel.org # v3.14
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/chip.c b/drivers/net/wireless/brcm80211/brcmfmac/chip.c
index df130ef53d1c4054f59f2fe10d197a80673000c9..c7c9f15c0fe08170ee2f953e9690a13e605a3291 100644 (file)
--- a/drivers/net/wireless/brcm80211/brcmfmac/chip.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/chip.c
@@ -303,10 +303,10 @@ static void brcmf_chip_ai_coredisable(struct brcmf_core_priv *core,
 
        ci = core->chip;
 
-       /* if core is already in reset, just return */
+       /* if core is already in reset, skip reset */
        regdata = ci->ops->read32(ci->ctx, core->wrapbase + BCMA_RESET_CTL);
        if ((regdata & BCMA_RESET_CTL_RESET) != 0)
-               return;
+               goto in_reset_configure;
 
        /* configure reset */
        ci->ops->write32(ci->ctx, core->wrapbase + BCMA_IOCTL,
@@ -322,6 +322,7 @@ static void brcmf_chip_ai_coredisable(struct brcmf_core_priv *core,
        SPINWAIT(ci->ops->read32(ci->ctx, core->wrapbase + BCMA_RESET_CTL) !=
                 BCMA_RESET_CTL_RESET, 300);
 
+in_reset_configure:
        /* in-reset configure */
        ci->ops->write32(ci->ctx, core->wrapbase + BCMA_IOCTL,
                         reset | BCMA_IOCTL_FGC | BCMA_IOCTL_CLK);