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Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_mac.h')
-rw-r--r--drivers/net/wireless/zd1211rw/zd_mac.h65
1 files changed, 44 insertions, 21 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.h b/drivers/net/wireless/zd1211rw/zd_mac.h
index 9f9344eb50f9..1b15bde3ff60 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.h
+++ b/drivers/net/wireless/zd1211rw/zd_mac.h
@@ -40,28 +40,51 @@ struct zd_ctrlset {
#define ZD_CS_RESERVED_SIZE 25
-/* zd_crtlset field modulation */
-#define ZD_CS_RATE_MASK 0x0f
-#define ZD_CS_TYPE_MASK 0x10
-#define ZD_CS_RATE(modulation) ((modulation) & ZD_CS_RATE_MASK)
-#define ZD_CS_TYPE(modulation) ((modulation) & ZD_CS_TYPE_MASK)
-
-#define ZD_CS_CCK 0x00
-#define ZD_CS_OFDM 0x10
-
-/* These are referred to as zd_rates */
-#define ZD_CCK_RATE_1M 0x00
-#define ZD_CCK_RATE_2M 0x01
-#define ZD_CCK_RATE_5_5M 0x02
-#define ZD_CCK_RATE_11M 0x03
-/* The rates for OFDM are encoded as in the PLCP header. Use ZD_OFDM_RATE_*.
+/* The field modulation of struct zd_ctrlset controls the bit rate, the use
+ * of short or long preambles in 802.11b (CCK mode) or the use of 802.11a or
+ * 802.11g in OFDM mode.
+ *
+ * The term zd-rate is used for the combination of the modulation type flag
+ * and the "pure" rate value.
*/
-
-/* bit 5 is preamble (when in CCK mode), or a/g selection (when in OFDM mode) */
-#define ZD_CS_CCK_PREA_LONG 0x00
-#define ZD_CS_CCK_PREA_SHORT 0x20
-#define ZD_CS_OFDM_MODE_11G 0x00
-#define ZD_CS_OFDM_MODE_11A 0x20
+#define ZD_PURE_RATE_MASK 0x0f
+#define ZD_MODULATION_TYPE_MASK 0x10
+#define ZD_RATE_MASK (ZD_PURE_RATE_MASK|ZD_MODULATION_TYPE_MASK)
+#define ZD_PURE_RATE(modulation) ((modulation) & ZD_PURE_RATE_MASK)
+#define ZD_MODULATION_TYPE(modulation) ((modulation) & ZD_MODULATION_TYPE_MASK)
+#define ZD_RATE(modulation) ((modulation) & ZD_RATE_MASK)
+
+/* The two possible modulation types. Notify that 802.11b doesn't use the CCK
+ * codeing for the 1 and 2 MBit/s rate. We stay with the term here to remain
+ * consistent with uses the term at other places.
+ */
+#define ZD_CCK 0x00
+#define ZD_OFDM 0x10
+
+/* The ZD1211 firmware uses proprietary encodings of the 802.11b (CCK) rates.
+ * For OFDM the PLCP rate encodings are used. We combine these "pure" rates
+ * with the modulation type flag and call the resulting values zd-rates.
+ */
+#define ZD_CCK_RATE_1M (ZD_CCK|0x00)
+#define ZD_CCK_RATE_2M (ZD_CCK|0x01)
+#define ZD_CCK_RATE_5_5M (ZD_CCK|0x02)
+#define ZD_CCK_RATE_11M (ZD_CCK|0x03)
+#define ZD_OFDM_RATE_6M (ZD_OFDM|ZD_OFDM_PLCP_RATE_6M)
+#define ZD_OFDM_RATE_9M (ZD_OFDM|ZD_OFDM_PLCP_RATE_9M)
+#define ZD_OFDM_RATE_12M (ZD_OFDM|ZD_OFDM_PLCP_RATE_12M)
+#define ZD_OFDM_RATE_18M (ZD_OFDM|ZD_OFDM_PLCP_RATE_18M)
+#define ZD_OFDM_RATE_24M (ZD_OFDM|ZD_OFDM_PLCP_RATE_24M)
+#define ZD_OFDM_RATE_36M (ZD_OFDM|ZD_OFDM_PLCP_RATE_36M)
+#define ZD_OFDM_RATE_48M (ZD_OFDM|ZD_OFDM_PLCP_RATE_48M)
+#define ZD_OFDM_RATE_54M (ZD_OFDM|ZD_OFDM_PLCP_RATE_54M)
+
+/* The bit 5 of the zd_ctrlset modulation field controls the preamble in CCK
+ * mode or the 802.11a/802.11g selection in OFDM mode.
+ */
+#define ZD_CCK_PREA_LONG 0x00
+#define ZD_CCK_PREA_SHORT 0x20
+#define ZD_OFDM_MODE_11G 0x00
+#define ZD_OFDM_MODE_11A 0x20
/* zd_ctrlset control field */
#define ZD_CS_NEED_RANDOM_BACKOFF 0x01