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path: root/drivers/net/wireless/zd1211rw/zd_mac.c
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Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_mac.c')
-rw-r--r--drivers/net/wireless/zd1211rw/zd_mac.c99
1 files changed, 27 insertions, 72 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c
index 7ec1fcf37fc..451308d7095 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.c
+++ b/drivers/net/wireless/zd1211rw/zd_mac.c
@@ -610,28 +610,6 @@ u8 zd_mac_get_channel(struct zd_mac *mac)
return channel;
}
-/* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */
-static u8 zd_rate_typed(u8 zd_rate)
-{
- static const u8 typed_rates[16] = {
- [ZD_CCK_RATE_1M] = ZD_CS_CCK|ZD_CCK_RATE_1M,
- [ZD_CCK_RATE_2M] = ZD_CS_CCK|ZD_CCK_RATE_2M,
- [ZD_CCK_RATE_5_5M] = ZD_CS_CCK|ZD_CCK_RATE_5_5M,
- [ZD_CCK_RATE_11M] = ZD_CS_CCK|ZD_CCK_RATE_11M,
- [ZD_OFDM_RATE_6M] = ZD_CS_OFDM|ZD_OFDM_RATE_6M,
- [ZD_OFDM_RATE_9M] = ZD_CS_OFDM|ZD_OFDM_RATE_9M,
- [ZD_OFDM_RATE_12M] = ZD_CS_OFDM|ZD_OFDM_RATE_12M,
- [ZD_OFDM_RATE_18M] = ZD_CS_OFDM|ZD_OFDM_RATE_18M,
- [ZD_OFDM_RATE_24M] = ZD_CS_OFDM|ZD_OFDM_RATE_24M,
- [ZD_OFDM_RATE_36M] = ZD_CS_OFDM|ZD_OFDM_RATE_36M,
- [ZD_OFDM_RATE_48M] = ZD_CS_OFDM|ZD_OFDM_RATE_48M,
- [ZD_OFDM_RATE_54M] = ZD_CS_OFDM|ZD_OFDM_RATE_54M,
- };
-
- ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f);
- return typed_rates[zd_rate & ZD_CS_RATE_MASK];
-}
-
int zd_mac_set_mode(struct zd_mac *mac, u32 mode)
{
struct ieee80211_device *ieee;
@@ -739,25 +717,30 @@ int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range)
static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
{
+ /* ZD_PURE_RATE() must be used to remove the modulation type flag of
+ * the zd-rate values. */
static const u8 rate_divisor[] = {
- [ZD_CCK_RATE_1M] = 1,
- [ZD_CCK_RATE_2M] = 2,
- [ZD_CCK_RATE_5_5M] = 11, /* bits must be doubled */
- [ZD_CCK_RATE_11M] = 11,
- [ZD_OFDM_RATE_6M] = 6,
- [ZD_OFDM_RATE_9M] = 9,
- [ZD_OFDM_RATE_12M] = 12,
- [ZD_OFDM_RATE_18M] = 18,
- [ZD_OFDM_RATE_24M] = 24,
- [ZD_OFDM_RATE_36M] = 36,
- [ZD_OFDM_RATE_48M] = 48,
- [ZD_OFDM_RATE_54M] = 54,
+ [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1,
+ [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2,
+
+ /* bits must be doubled */
+ [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11,
+
+ [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11,
+ [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6,
+ [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9,
+ [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12,
+ [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18,
+ [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24,
+ [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36,
+ [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48,
+ [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54,
};
u32 bits = (u32)tx_length * 8;
u32 divisor;
- divisor = rate_divisor[zd_rate];
+ divisor = rate_divisor[ZD_PURE_RATE(zd_rate)];
if (divisor == 0)
return -EINVAL;
@@ -780,52 +763,24 @@ static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length)
return bits/divisor;
}
-enum {
- R2M_SHORT_PREAMBLE = 0x01,
- R2M_11A = 0x02,
-};
-
-static u8 zd_rate_to_modulation(u8 zd_rate, int flags)
-{
- u8 modulation;
-
- modulation = zd_rate_typed(zd_rate);
- if (flags & R2M_SHORT_PREAMBLE) {
- switch (ZD_CS_RATE(modulation)) {
- case ZD_CCK_RATE_2M:
- case ZD_CCK_RATE_5_5M:
- case ZD_CCK_RATE_11M:
- modulation |= ZD_CS_CCK_PREA_SHORT;
- return modulation;
- }
- }
- if (flags & R2M_11A) {
- if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM)
- modulation |= ZD_CS_OFDM_MODE_11A;
- }
- return modulation;
-}
-
static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs,
struct ieee80211_hdr_4addr *hdr)
{
struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev);
u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl));
- u8 rate, zd_rate;
+ u8 rate;
int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0;
int is_multicast = is_multicast_ether_addr(hdr->addr1);
int short_preamble = ieee80211softmac_short_preamble_ok(softmac,
is_multicast, is_mgt);
- int flags = 0;
- /* FIXME: 802.11a? */
rate = ieee80211softmac_suggest_txrate(softmac, is_multicast, is_mgt);
+ cs->modulation = rate_to_zd_rate(rate);
- if (short_preamble)
- flags |= R2M_SHORT_PREAMBLE;
-
- zd_rate = rate_to_zd_rate(rate);
- cs->modulation = zd_rate_to_modulation(zd_rate, flags);
+ /* Set short preamble bit when appropriate */
+ if (short_preamble && ZD_MODULATION_TYPE(cs->modulation) == ZD_CCK
+ && cs->modulation != ZD_CCK_RATE_1M)
+ cs->modulation |= ZD_CCK_PREA_SHORT;
}
static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
@@ -864,7 +819,7 @@ static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
cs->control |= ZD_CS_RTS;
/* Use CTS-to-self protection if required */
- if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM &&
+ if (ZD_MODULATION_TYPE(cs->modulation) == ZD_OFDM &&
ieee80211softmac_protection_needed(softmac)) {
/* FIXME: avoid sending RTS *and* self-CTS, is that correct? */
cs->control &= ~ZD_CS_RTS;
@@ -925,7 +880,7 @@ static int fill_ctrlset(struct zd_mac *mac,
* - see line 53 of zdinlinef.h
*/
cs->service = 0;
- r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation),
+ r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation),
le16_to_cpu(cs->tx_length));
if (r < 0)
return r;
@@ -934,7 +889,7 @@ static int fill_ctrlset(struct zd_mac *mac,
if (next_frag_len == 0) {
cs->next_frame_length = 0;
} else {
- r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation),
+ r = zd_calc_tx_length_us(NULL, ZD_RATE(cs->modulation),
next_frag_len);
if (r < 0)
return r;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-27 15:46:08 +0000