ath5k: HW code cleanup

 * No code changes...

 * Split hw.c to multiple files for better maintenance and add some documentation on each file
   code is going to grow soon (eeprom.c for example is going to get much stuff currently developed
   on ath_info) so it's better this way.

 * Rename following functions to maintain naming scheme:

     ah_setup_xtx_desc -> ah_setup_mrr_tx_desc
     (Because xtx doesn't say much, it's actually
     a multi-rate-retry tx descriptor)

     ath5k_hw_put_tx/rx_buf - > ath5k_hw_set_tx/rxdp
     ath5k_hw_get_tx/rx_buf -> ath5k_hw_get_tx/rxdp
     (We don't put any "buf" we set descriptor pointers on hw)

     ath5k_hw_tx_start -> ath5k_hw_start_tx_dma
     ath5k_hw_start_rx -> ath5k_hw_start_rx_dma
     ath5k_hw_stop_pcu_recv -> ath5k_hw_stop_rx_pcu
     (It's easier this way to identify them, we also
     have ath5k_hw_start_rx_pcu which completes the
     set)

     ath5k_hw_set_intr -> ath5k_hw_set_imr
     (As in get_isr we set imr here, not "intr")

  * Move ath5k_hw_setup_rx_desc on ah->ah_setup_rx_desc so we can
    include support for different rx descriptors in the future

  * Further cleanups so that checkpatch doesn't complain
    (only some > 80 col warnings for eeprom.h and reg.h as usual
    due to comments)

  Tested on 5211 and 5213 cards and works ok.

Changes-licensed-under: ISC
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Acked-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 193 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath5k/caps.c b/drivers/net/wireless/ath5k/caps.c
new file mode 100644
index 00000000000..150f5ed204a
--- /dev/null
+++ b/drivers/net/wireless/ath5k/caps.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
+ * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
+ * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+/**************\
+* Capabilities *
+\**************/
+
+#include "ath5k.h"
+#include "reg.h"
+#include "debug.h"
+#include "base.h"
+
+/*
+ * Fill the capabilities struct
+ * TODO: Merge this with EEPROM code when we are done with it
+ */
+int ath5k_hw_set_capabilities(struct ath5k_hw *ah)
+{
+	u16 ee_header;
+
+	ATH5K_TRACE(ah->ah_sc);
+	/* Capabilities stored in the EEPROM */
+	ee_header = ah->ah_capabilities.cap_eeprom.ee_header;
+
+	if (ah->ah_version == AR5K_AR5210) {
+		/*
+		 * Set radio capabilities
+		 * (The AR5110 only supports the middle 5GHz band)
+		 */
+		ah->ah_capabilities.cap_range.range_5ghz_min = 5120;
+		ah->ah_capabilities.cap_range.range_5ghz_max = 5430;
+		ah->ah_capabilities.cap_range.range_2ghz_min = 0;
+		ah->ah_capabilities.cap_range.range_2ghz_max = 0;
+
+		/* Set supported modes */
+		__set_bit(AR5K_MODE_11A, ah->ah_capabilities.cap_mode);
+		__set_bit(AR5K_MODE_11A_TURBO, ah->ah_capabilities.cap_mode);
+	} else {
+		/*
+		 * XXX The tranceiver supports frequencies from 4920 to 6100GHz
+		 * XXX and from 2312 to 2732GHz. There are problems with the
+		 * XXX current ieee80211 implementation because the IEEE
+		 * XXX channel mapping does not support negative channel
+		 * XXX numbers (2312MHz is channel -19). Of course, this
+		 * XXX doesn't matter because these channels are out of range
+		 * XXX but some regulation domains like MKK (Japan) will
+		 * XXX support frequencies somewhere around 4.8GHz.
+		 */
+
+		/*
+		 * Set radio capabilities
+		 */
+
+		if (AR5K_EEPROM_HDR_11A(ee_header)) {
+			/* 4920 */
+			ah->ah_capabilities.cap_range.range_5ghz_min = 5005;
+			ah->ah_capabilities.cap_range.range_5ghz_max = 6100;
+
+			/* Set supported modes */
+			__set_bit(AR5K_MODE_11A,
+					ah->ah_capabilities.cap_mode);
+			__set_bit(AR5K_MODE_11A_TURBO,
+					ah->ah_capabilities.cap_mode);
+			if (ah->ah_version == AR5K_AR5212)
+				__set_bit(AR5K_MODE_11G_TURBO,
+						ah->ah_capabilities.cap_mode);
+		}
+
+		/* Enable  802.11b if a 2GHz capable radio (2111/5112) is
+		 * connected */
+		if (AR5K_EEPROM_HDR_11B(ee_header) ||
+				AR5K_EEPROM_HDR_11G(ee_header)) {
+			/* 2312 */
+			ah->ah_capabilities.cap_range.range_2ghz_min = 2412;
+			ah->ah_capabilities.cap_range.range_2ghz_max = 2732;
+
+			if (AR5K_EEPROM_HDR_11B(ee_header))
+				__set_bit(AR5K_MODE_11B,
+						ah->ah_capabilities.cap_mode);
+
+			if (AR5K_EEPROM_HDR_11G(ee_header))
+				__set_bit(AR5K_MODE_11G,
+						ah->ah_capabilities.cap_mode);
+		}
+	}
+
+	/* GPIO */
+	ah->ah_gpio_npins = AR5K_NUM_GPIO;
+
+	/* Set number of supported TX queues */
+	if (ah->ah_version == AR5K_AR5210)
+		ah->ah_capabilities.cap_queues.q_tx_num =
+			AR5K_NUM_TX_QUEUES_NOQCU;
+	else
+		ah->ah_capabilities.cap_queues.q_tx_num = AR5K_NUM_TX_QUEUES;
+
+	return 0;
+}
+
+/* Main function used by the driver part to check caps */
+int ath5k_hw_get_capability(struct ath5k_hw *ah,
+		enum ath5k_capability_type cap_type,
+		u32 capability, u32 *result)
+{
+	ATH5K_TRACE(ah->ah_sc);
+
+	switch (cap_type) {
+	case AR5K_CAP_NUM_TXQUEUES:
+		if (result) {
+			if (ah->ah_version == AR5K_AR5210)
+				*result = AR5K_NUM_TX_QUEUES_NOQCU;
+			else
+				*result = AR5K_NUM_TX_QUEUES;
+			goto yes;
+		}
+	case AR5K_CAP_VEOL:
+		goto yes;
+	case AR5K_CAP_COMPRESSION:
+		if (ah->ah_version == AR5K_AR5212)
+			goto yes;
+		else
+			goto no;
+	case AR5K_CAP_BURST:
+		goto yes;
+	case AR5K_CAP_TPC:
+		goto yes;
+	case AR5K_CAP_BSSIDMASK:
+		if (ah->ah_version == AR5K_AR5212)
+			goto yes;
+		else
+			goto no;
+	case AR5K_CAP_XR:
+		if (ah->ah_version == AR5K_AR5212)
+			goto yes;
+		else
+			goto no;
+	default:
+		goto no;
+	}
+
+no:
+	return -EINVAL;
+yes:
+	return 0;
+}
+
+/*
+ * TODO: Following functions should be part of a new function
+ * set_capability
+ */
+
+int ath5k_hw_enable_pspoll(struct ath5k_hw *ah, u8 *bssid,
+		u16 assoc_id)
+{
+	ATH5K_TRACE(ah->ah_sc);
+
+	if (ah->ah_version == AR5K_AR5210) {
+		AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1,
+			AR5K_STA_ID1_NO_PSPOLL | AR5K_STA_ID1_DEFAULT_ANTENNA);
+		return 0;
+	}
+
+	return -EIO;
+}
+
+int ath5k_hw_disable_pspoll(struct ath5k_hw *ah)
+{
+	ATH5K_TRACE(ah->ah_sc);
+
+	if (ah->ah_version == AR5K_AR5210) {
+		AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1,
+			AR5K_STA_ID1_NO_PSPOLL | AR5K_STA_ID1_DEFAULT_ANTENNA);
+		return 0;
+	}
+
+	return -EIO;
+}