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authorJussi Kivilinna <jussi.kivilinna@mbnet.fi>2011-01-31 20:47:36 +0200
committerJohn W. Linville <linville@tuxdriver.com>2011-02-04 16:29:48 -0500
commit88a1159a376995e1f9ca6e9b1d4f2e4c44d79d13 (patch)
tree46f56636f8fdd0cde383848c952eb1672c936590
parentzd1211rw: add locking for mac->process_intr (diff)
downloadlinux-dev-88a1159a376995e1f9ca6e9b1d4f2e4c44d79d13.tar.xz
linux-dev-88a1159a376995e1f9ca6e9b1d4f2e4c44d79d13.zip
zd1211rw: fix beacon interval setup
Vendor driver uses CR_BNC_INTERVAL at various places, one is HW_EnableBeacon() that combinies beacon interval with BSS-type flag and DTIM value in upper 16bit of u32. The other one is HW_UpdateBcnInterval() that set_aw_pt_bi() appears to be based on. HW_UpdateBcnInterval() takes interval argument as u16 and uses that for calculations, set_aw_pt_bi() uses u32 value that has flags and dtim in upper part. This clearly seems wrong. Also HW_UpdateBcnInterval() updates only lower 16bit part of CR_BNC_INTERVAL. So make set_aw_pt_bi() do calculations on only lower u16 part of s->beacon_interval. Also set 32bit beacon interval register before reading values from device, as HW_EnableBeacon() on vendor driver does. This is required to make beacon work on AP-mode, simply reading and then writing updated values is not enough at least with zd1211b. Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/zd1211rw/zd_chip.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_chip.c b/drivers/net/wireless/zd1211rw/zd_chip.c
index b644ced848e7..447f2360b0ca 100644
--- a/drivers/net/wireless/zd1211rw/zd_chip.c
+++ b/drivers/net/wireless/zd1211rw/zd_chip.c
@@ -849,11 +849,12 @@ static int get_aw_pt_bi(struct zd_chip *chip, struct aw_pt_bi *s)
static int set_aw_pt_bi(struct zd_chip *chip, struct aw_pt_bi *s)
{
struct zd_ioreq32 reqs[3];
+ u16 b_interval = s->beacon_interval & 0xffff;
- if (s->beacon_interval <= 5)
- s->beacon_interval = 5;
- if (s->pre_tbtt < 4 || s->pre_tbtt >= s->beacon_interval)
- s->pre_tbtt = s->beacon_interval - 1;
+ if (b_interval <= 5)
+ b_interval = 5;
+ if (s->pre_tbtt < 4 || s->pre_tbtt >= b_interval)
+ s->pre_tbtt = b_interval - 1;
if (s->atim_wnd_period >= s->pre_tbtt)
s->atim_wnd_period = s->pre_tbtt - 1;
@@ -862,7 +863,7 @@ static int set_aw_pt_bi(struct zd_chip *chip, struct aw_pt_bi *s)
reqs[1].addr = CR_PRE_TBTT;
reqs[1].value = s->pre_tbtt;
reqs[2].addr = CR_BCN_INTERVAL;
- reqs[2].value = s->beacon_interval;
+ reqs[2].value = (s->beacon_interval & ~0xffff) | b_interval;
return zd_iowrite32a_locked(chip, reqs, ARRAY_SIZE(reqs));
}
@@ -874,10 +875,13 @@ static int set_beacon_interval(struct zd_chip *chip, u32 interval)
struct aw_pt_bi s;
ZD_ASSERT(mutex_is_locked(&chip->mutex));
+
+ r = zd_iowrite32_locked(chip, interval, CR_BCN_INTERVAL);
+ if (r)
+ return r;
r = get_aw_pt_bi(chip, &s);
if (r)
return r;
- s.beacon_interval = interval;
return set_aw_pt_bi(chip, &s);
}