[ath5k] Update for changes in kernel 2.6.31

This adds basic rfkill support for enabling the wireless card on certain
laptops, and changes miscellaneous other details that may help in obscure
cases.

Also change the error handling to not report CRC errors, which due to the
basic facts of wireless may happen even more frequently than valid packets.

Signed-off-by: Marty Connor <mdc@etherboot.org>

src/drivers/net/ath5k/ath5k.c

@@ -1195,11 +1195,12 @@ ath5k_handle_rx(struct ath5k_softc *sc)
 
 		if (rs.rs_status) {
 			if (rs.rs_status & AR5K_RXERR_PHY) {
-				DBG("ath5k: rx PHY error\n");
+				/* These are uncommon, and may indicate a real problem. */
+				net80211_rx_err(sc->dev, NULL, EIO);
 				goto next;
 			}
 			if (rs.rs_status & AR5K_RXERR_CRC) {
-				net80211_rx_err(sc->dev, NULL, EIO);
+				/* These occur *all the time*. */
 				goto next;
 			}
 			if (rs.rs_status & AR5K_RXERR_DECRYPT) {
@@ -1358,6 +1359,8 @@ ath5k_init(struct ath5k_softc *sc)
 	if (ret)
 		goto done;
 
+	ath5k_rfkill_hw_start(ah);
+
 	/*
 	 * Reset the key cache since some parts do not reset the
 	 * contents on initial power up or resume from suspend.
@@ -1405,6 +1408,8 @@ ath5k_stop_hw(struct ath5k_softc *sc)
 	} else
 		sc->rxlink = NULL;
 
+	ath5k_rfkill_hw_stop(sc->ah);
+
 	return 0;
 }
 

src/drivers/net/ath5k/ath5k.h

@@ -1153,6 +1153,10 @@ extern u32 ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio);
 extern int ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val);
 extern void ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio, u32 interrupt_level);
 
+/* rfkill Functions */
+extern void ath5k_rfkill_hw_start(struct ath5k_hw *ah);
+extern void ath5k_rfkill_hw_stop(struct ath5k_hw *ah);
+
 /* Misc functions */
 int ath5k_hw_set_capabilities(struct ath5k_hw *ah);
 extern int ath5k_hw_get_capability(struct ath5k_hw *ah, enum ath5k_capability_type cap_type, u32 capability, u32 *result);

src/drivers/net/ath5k/ath5k_eeprom.c

@@ -146,6 +146,17 @@ ath5k_eeprom_init_header(struct ath5k_hw *ah)
 		ee->ee_db[AR5K_EEPROM_MODE_11G][0] = (val >> 3) & 0x7;
 	}
 
+	AR5K_EEPROM_READ(AR5K_EEPROM_IS_HB63, val);
+
+	if ((ah->ah_mac_version == (AR5K_SREV_AR2425 >> 4)) && val)
+		ee->ee_is_hb63 = 1;
+	else
+		ee->ee_is_hb63 = 0;
+
+	AR5K_EEPROM_READ(AR5K_EEPROM_RFKILL, val);
+	ee->ee_rfkill_pin = (u8) AR5K_REG_MS(val, AR5K_EEPROM_RFKILL_GPIO_SEL);
+	ee->ee_rfkill_pol = val & AR5K_EEPROM_RFKILL_POLARITY ? 1 : 0;
+
 	return 0;
 }
 

src/drivers/net/ath5k/ath5k_initvals.c

@@ -723,7 +723,7 @@ static const struct ath5k_ini_mode ar5212_ini_mode_start[] = {
 	{ AR5K_PHY_SETTLING,
 	   { 0x1372161c, 0x13721c25, 0x13721722, 0x137216a2, 0x13721c25 } },
 	{ AR5K_PHY_AGCCTL,
-	   { 0x00009d10, 0x00009d10, 0x00009d18, 0x00009d18, 0x00009d18 } },
+	   { 0x00009d10, 0x00009d10, 0x00009d18, 0x00009d18, 0x00009d10 } },
 	{ AR5K_PHY_NF,
 	   { 0x0001ce00, 0x0001ce00, 0x0001ce00, 0x0001ce00, 0x0001ce00 } },
 	{ AR5K_PHY_WEAK_OFDM_HIGH_THR,
@@ -804,7 +804,7 @@ static const struct ath5k_ini_mode rf5112_ini_mode_end[] = {
 	{ AR5K_PHY_DESIRED_SIZE,
 	   { 0x0de8b4e0, 0x0de8b4e0, 0x0de8b4e0, 0x0de8b4e0, 0x0de8b4e0 } },
 	{ AR5K_PHY_SIG,
-	   { 0x7e800d2e, 0x7e800d2e, 0x7ee80d2e, 0x7ee80d2e, 0x7ee80d2e } },
+	   { 0x7e800d2e, 0x7e800d2e, 0x7ee80d2e, 0x7ee80d2e, 0x7e800d2e } },
 	{ AR5K_PHY_AGCCOARSE,
 	   { 0x3137665e, 0x3137665e, 0x3137665e, 0x3137665e, 0x3137665e } },
 	{ AR5K_PHY_WEAK_OFDM_LOW_THR,

src/drivers/net/ath5k/ath5k_pcu.c

@@ -520,7 +520,7 @@ int ath5k_hw_reset_key(struct ath5k_hw *ah, u16 entry)
 	 * Note2: Windows driver (ndiswrapper) sets this to
 	 *        0x00000714 instead of 0x00000007
 	 */
-	if (ah->ah_version > AR5K_AR5211) {
+	if (ah->ah_version >= AR5K_AR5211) {
 		ath5k_hw_reg_write(ah, AR5K_KEYTABLE_TYPE_NULL,
 				AR5K_KEYTABLE_TYPE(entry));
 

src/drivers/net/ath5k/ath5k_rfkill.c

@@ -0,0 +1,107 @@
+/*
+ * RFKILL support for ath5k
+ *
+ * Copyright (c) 2009 Tobias Doerffel <tobias.doerffel@gmail.com>
+ * Lightly modified for gPXE, Sep 2008 by Joshua Oreman <oremanj@rwcr.net>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ */
+
+FILE_LICENCE ( MIT );
+
+#include "base.h"
+
+
+static inline void ath5k_rfkill_disable(struct ath5k_softc *sc)
+{
+	DBG("ath5k: rfkill disable (gpio:%d polarity:%d)\n",
+	    sc->rf_kill.gpio, sc->rf_kill.polarity);
+	ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio);
+	ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, !sc->rf_kill.polarity);
+}
+
+
+static inline void ath5k_rfkill_enable(struct ath5k_softc *sc)
+{
+	DBG("ath5k: rfkill enable (gpio:%d polarity:%d)\n",
+	    sc->rf_kill.gpio, sc->rf_kill.polarity);
+	ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio);
+	ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, sc->rf_kill.polarity);
+}
+
+static inline void ath5k_rfkill_set_intr(struct ath5k_softc *sc, int enable)
+{
+	struct ath5k_hw *ah = sc->ah;
+	u32 curval;
+
+	ath5k_hw_set_gpio_input(ah, sc->rf_kill.gpio);
+	curval = ath5k_hw_get_gpio(ah, sc->rf_kill.gpio);
+	ath5k_hw_set_gpio_intr(ah, sc->rf_kill.gpio, enable ?
+			       !!curval : !curval);
+}
+
+static int __unused
+ath5k_is_rfkill_set(struct ath5k_softc *sc)
+{
+	/* configuring GPIO for input for some reason disables rfkill */
+	/*ath5k_hw_set_gpio_input(sc->ah, sc->rf_kill.gpio);*/
+	return (ath5k_hw_get_gpio(sc->ah, sc->rf_kill.gpio) ==
+		sc->rf_kill.polarity);
+}
+
+void
+ath5k_rfkill_hw_start(struct ath5k_hw *ah)
+{
+	struct ath5k_softc *sc = ah->ah_sc;
+
+	/* read rfkill GPIO configuration from EEPROM header */
+	sc->rf_kill.gpio = ah->ah_capabilities.cap_eeprom.ee_rfkill_pin;
+	sc->rf_kill.polarity = ah->ah_capabilities.cap_eeprom.ee_rfkill_pol;
+
+	ath5k_rfkill_disable(sc);
+
+	/* enable interrupt for rfkill switch */
+	if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header))
+		ath5k_rfkill_set_intr(sc, 1);
+}
+
+
+void
+ath5k_rfkill_hw_stop(struct ath5k_hw *ah)
+{
+	struct ath5k_softc *sc = ah->ah_sc;
+
+	/* disable interrupt for rfkill switch */
+	if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header))
+		ath5k_rfkill_set_intr(sc, 0);
+
+	/* enable RFKILL when stopping HW so Wifi LED is turned off */
+	ath5k_rfkill_enable(sc);
+}

src/drivers/net/ath5k/base.h

@@ -123,6 +123,11 @@ struct ath5k_softc {
 	unsigned int		txbuf_len;	/* buf count in txbuf list */
 	struct ath5k_txq	txq;		/* tx queue */
 
+	struct {
+		u16 gpio;
+		unsigned polarity;
+	} rf_kill;
+
 	int			last_calib_ticks;
 
 	int 			power_level;	/* Requested tx power in dbm */

src/drivers/net/ath5k/eeprom.h

@@ -26,6 +26,13 @@
 #define AR5K_EEPROM_MAGIC_5210		0x0000145a /* 5210 */
 
 #define	AR5K_EEPROM_IS_HB63		0x000b	/* Talon detect */
+
+#define AR5K_EEPROM_RFKILL		0x0f
+#define AR5K_EEPROM_RFKILL_GPIO_SEL	0x0000001c
+#define AR5K_EEPROM_RFKILL_GPIO_SEL_S	2
+#define AR5K_EEPROM_RFKILL_POLARITY	0x00000002
+#define AR5K_EEPROM_RFKILL_POLARITY_S	1
+
 #define AR5K_EEPROM_REG_DOMAIN		0x00bf	/* EEPROM regdom */
 #define AR5K_EEPROM_CHECKSUM		0x00c0	/* EEPROM checksum */
 #define AR5K_EEPROM_INFO_BASE		0x00c0	/* EEPROM header */
@@ -369,6 +376,9 @@ struct ath5k_eeprom_info {
 	u16	ee_version;
 	u16	ee_header;
 	u16	ee_ant_gain;
+	u8	ee_rfkill_pin;
+	int	ee_rfkill_pol;
+	int	ee_is_hb63;
 	u16	ee_misc0;
 	u16	ee_misc1;
 	u16	ee_misc2;