gpxe/src/drivers/net/ath5k/ath5k_attach.c - platform/external/syslinux - Git at Google

 /*
  * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
  * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
  *
  * Modified for gPXE, July 2009, by Joshua Oreman <oremanj@rwcr.net>
  * Original from Linux kernel 2.6.30.
  *
  * 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.
  *
  */

 FILE_LICENCE ( MIT );

 /*************************************\
 * Attach/Detach Functions and helpers *
 \*************************************/

 #include <gpxe/pci.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include "ath5k.h"
 #include "reg.h"
 #include "base.h"

 /**
  * ath5k_hw_post - Power On Self Test helper function
  *
  * @ah: The &struct ath5k_hw
  */
 static int ath5k_hw_post(struct ath5k_hw *ah)
 {

 	static const u32 static_pattern[4] = {
 		0x55555555,	0xaaaaaaaa,
 		0x66666666,	0x99999999
 	};
 	static const u16 regs[2] = { AR5K_STA_ID0, AR5K_PHY(8) };
 	int i, c;
 	u16 cur_reg;
 	u32 var_pattern;
 	u32 init_val;
 	u32 cur_val;

 	for (c = 0; c < 2; c++) {

 		cur_reg = regs[c];

 		/* Save previous value */
 		init_val = ath5k_hw_reg_read(ah, cur_reg);

 		for (i = 0; i < 256; i++) {
 			var_pattern = i << 16 | i;
 			ath5k_hw_reg_write(ah, var_pattern, cur_reg);
 			cur_val = ath5k_hw_reg_read(ah, cur_reg);

 			if (cur_val != var_pattern) {
 				DBG("ath5k: POST failed!\n");
 				return -EAGAIN;
 			}

 			/* Found on ndiswrapper dumps */
 			var_pattern = 0x0039080f;
 			ath5k_hw_reg_write(ah, var_pattern, cur_reg);
 		}

 		for (i = 0; i < 4; i++) {
 			var_pattern = static_pattern[i];
 			ath5k_hw_reg_write(ah, var_pattern, cur_reg);
 			cur_val = ath5k_hw_reg_read(ah, cur_reg);

 			if (cur_val != var_pattern) {
 				DBG("ath5k: POST failed!\n");
 				return -EAGAIN;
 			}

 			/* Found on ndiswrapper dumps */
 			var_pattern = 0x003b080f;
 			ath5k_hw_reg_write(ah, var_pattern, cur_reg);
 		}

 		/* Restore previous value */
 		ath5k_hw_reg_write(ah, init_val, cur_reg);

 	}

 	return 0;

 }

 /**
  * ath5k_hw_attach - Check if hw is supported and init the needed structs
  *
  * @sc: The &struct ath5k_softc we got from the driver's attach function
  * @mac_version: The mac version id (check out ath5k.h) based on pci id
  * @hw: Returned newly allocated hardware structure, on success
  *
  * Check if the device is supported, perform a POST and initialize the needed
  * structs. Returns -ENOMEM if we don't have memory for the needed structs,
  * -ENODEV if the device is not supported or prints an error msg if something
  * else went wrong.
  */
 int ath5k_hw_attach(struct ath5k_softc *sc, u8 mac_version,
 		    struct ath5k_hw **hw)
 {
 	struct ath5k_hw *ah;
 	struct pci_device *pdev = sc->pdev;
 	int ret;
 	u32 srev;

 	ah = zalloc(sizeof(struct ath5k_hw));
 	if (ah == NULL) {
 		ret = -ENOMEM;
 		DBG("ath5k: out of memory\n");
 		goto err;
 	}

 	ah->ah_sc = sc;
 	ah->ah_iobase = sc->iobase;

 	/*
 	 * HW information
 	 */
 	ah->ah_turbo = 0;
 	ah->ah_txpower.txp_tpc = 0;
 	ah->ah_imr = 0;
 	ah->ah_atim_window = 0;
 	ah->ah_aifs = AR5K_TUNE_AIFS;
 	ah->ah_cw_min = AR5K_TUNE_CWMIN;
 	ah->ah_limit_tx_retries = AR5K_INIT_TX_RETRY;
 	ah->ah_software_retry = 0;
 	ah->ah_ant_diversity = AR5K_TUNE_ANT_DIVERSITY;

 	/*
 	 * Set the mac version based on the pci id
 	 */
 	ah->ah_version = mac_version;

 	/*Fill the ath5k_hw struct with the needed functions*/
 	ret = ath5k_hw_init_desc_functions(ah);
 	if (ret)
 		goto err_free;

 	/* Bring device out of sleep and reset it's units */
 	ret = ath5k_hw_nic_wakeup(ah, CHANNEL_B, 1);
 	if (ret)
 		goto err_free;

 	/* Get MAC, PHY and RADIO revisions */
 	srev = ath5k_hw_reg_read(ah, AR5K_SREV);
 	ah->ah_mac_srev = srev;
 	ah->ah_mac_version = AR5K_REG_MS(srev, AR5K_SREV_VER);
 	ah->ah_mac_revision = AR5K_REG_MS(srev, AR5K_SREV_REV);
 	ah->ah_phy_revision = ath5k_hw_reg_read(ah, AR5K_PHY_CHIP_ID);
 	ah->ah_radio_5ghz_revision = ath5k_hw_radio_revision(ah, CHANNEL_5GHZ);
 	ah->ah_phy = AR5K_PHY(0);

 	/* Try to identify radio chip based on it's srev */
 	switch (ah->ah_radio_5ghz_revision & 0xf0) {
 	case AR5K_SREV_RAD_5111:
 		ah->ah_radio = AR5K_RF5111;
 		ah->ah_single_chip = 0;
 		ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
 							CHANNEL_2GHZ);
 		break;
 	case AR5K_SREV_RAD_5112:
 	case AR5K_SREV_RAD_2112:
 		ah->ah_radio = AR5K_RF5112;
 		ah->ah_single_chip = 0;
 		ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
 							CHANNEL_2GHZ);
 		break;
 	case AR5K_SREV_RAD_2413:
 		ah->ah_radio = AR5K_RF2413;
 		ah->ah_single_chip = 1;
 		break;
 	case AR5K_SREV_RAD_5413:
 		ah->ah_radio = AR5K_RF5413;
 		ah->ah_single_chip = 1;
 		break;
 	case AR5K_SREV_RAD_2316:
 		ah->ah_radio = AR5K_RF2316;
 		ah->ah_single_chip = 1;
 		break;
 	case AR5K_SREV_RAD_2317:
 		ah->ah_radio = AR5K_RF2317;
 		ah->ah_single_chip = 1;
 		break;
 	case AR5K_SREV_RAD_5424:
 		if (ah->ah_mac_version == AR5K_SREV_AR2425 ||
 		    ah->ah_mac_version == AR5K_SREV_AR2417) {
 			ah->ah_radio = AR5K_RF2425;
 		} else {
 			ah->ah_radio = AR5K_RF5413;
 		}
 		ah->ah_single_chip = 1;
 		break;
 	default:
 		/* Identify radio based on mac/phy srev */
 		if (ah->ah_version == AR5K_AR5210) {
 			ah->ah_radio = AR5K_RF5110;
 			ah->ah_single_chip = 0;
 		} else if (ah->ah_version == AR5K_AR5211) {
 			ah->ah_radio = AR5K_RF5111;
 			ah->ah_single_chip = 0;
 			ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
 								CHANNEL_2GHZ);
 		} else if (ah->ah_mac_version == (AR5K_SREV_AR2425 >> 4) ||
 			   ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4) ||
 			   ah->ah_phy_revision == AR5K_SREV_PHY_2425) {
 			ah->ah_radio = AR5K_RF2425;
 			ah->ah_single_chip = 1;
 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2425;
 		} else if (srev == AR5K_SREV_AR5213A &&
 			   ah->ah_phy_revision == AR5K_SREV_PHY_5212B) {
 			ah->ah_radio = AR5K_RF5112;
 			ah->ah_single_chip = 0;
 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5112B;
 		} else if (ah->ah_mac_version == (AR5K_SREV_AR2415 >> 4)) {
 			ah->ah_radio = AR5K_RF2316;
 			ah->ah_single_chip = 1;
 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2316;
 		} else if (ah->ah_mac_version == (AR5K_SREV_AR5414 >> 4) ||
 			   ah->ah_phy_revision == AR5K_SREV_PHY_5413) {
 			ah->ah_radio = AR5K_RF5413;
 			ah->ah_single_chip = 1;
 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5413;
 		} else if (ah->ah_mac_version == (AR5K_SREV_AR2414 >> 4) ||
 			   ah->ah_phy_revision == AR5K_SREV_PHY_2413) {
 			ah->ah_radio = AR5K_RF2413;
 			ah->ah_single_chip = 1;
 			ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2413;
 		} else {
 			DBG("ath5k: Couldn't identify radio revision.\n");
 			ret = -ENOTSUP;
 			goto err_free;
 		}
 	}

 	/* Return on unsuported chips (unsupported eeprom etc) */
 	if ((srev >= AR5K_SREV_AR5416) &&
 	    (srev < AR5K_SREV_AR2425)) {
 		DBG("ath5k: Device not yet supported.\n");
 		ret = -ENOTSUP;
 		goto err_free;
 	}

 	/*
 	 * Write PCI-E power save settings
 	 */
 	if ((ah->ah_version == AR5K_AR5212) &&
 	    pci_find_capability(pdev, PCI_CAP_ID_EXP)) {
 		ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES);
 		ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES);
 		/* Shut off RX when elecidle is asserted */
 		ath5k_hw_reg_write(ah, 0x28000039, AR5K_PCIE_SERDES);
 		ath5k_hw_reg_write(ah, 0x53160824, AR5K_PCIE_SERDES);
 		/* TODO: EEPROM work */
 		ath5k_hw_reg_write(ah, 0xe5980579, AR5K_PCIE_SERDES);
 		/* Shut off PLL and CLKREQ active in L1 */
 		ath5k_hw_reg_write(ah, 0x001defff, AR5K_PCIE_SERDES);
 		/* Preserce other settings */
 		ath5k_hw_reg_write(ah, 0x1aaabe40, AR5K_PCIE_SERDES);
 		ath5k_hw_reg_write(ah, 0xbe105554, AR5K_PCIE_SERDES);
 		ath5k_hw_reg_write(ah, 0x000e3007, AR5K_PCIE_SERDES);
 		/* Reset SERDES to load new settings */
 		ath5k_hw_reg_write(ah, 0x00000000, AR5K_PCIE_SERDES_RESET);
 		mdelay(1);
 	}

 	/*
 	 * POST
 	 */
 	ret = ath5k_hw_post(ah);
 	if (ret)
 		goto err_free;

 	/* Enable pci core retry fix on Hainan (5213A) and later chips */
 	if (srev >= AR5K_SREV_AR5213A)
 		ath5k_hw_reg_write(ah, AR5K_PCICFG_RETRY_FIX, AR5K_PCICFG);

 	/*
 	 * Get card capabilities, calibration values etc
 	 * TODO: EEPROM work
 	 */
 	ret = ath5k_eeprom_init(ah);
 	if (ret) {
 		DBG("ath5k: unable to init EEPROM\n");
 		goto err_free;
 	}

 	/* Get misc capabilities */
 	ret = ath5k_hw_set_capabilities(ah);
 	if (ret) {
 		DBG("ath5k: unable to get device capabilities: 0x%04x\n",
 		    sc->pdev->device);
 		goto err_free;
 	}

 	if (srev >= AR5K_SREV_AR2414) {
 		ah->ah_combined_mic = 1;
 		AR5K_REG_ENABLE_BITS(ah, AR5K_MISC_MODE,
 				     AR5K_MISC_MODE_COMBINED_MIC);
 	}

 	/* Set BSSID to bcast address: ff:ff:ff:ff:ff:ff for now */
 	memset(ah->ah_bssid, 0xff, ETH_ALEN);
 	ath5k_hw_set_associd(ah, ah->ah_bssid, 0);
 	ath5k_hw_set_opmode(ah);

 	ath5k_hw_rfgain_opt_init(ah);

 	*hw = ah;
 	return 0;
 err_free:
 	free(ah);
 err:
 	return ret;
 }

 /**
  * ath5k_hw_detach - Free the ath5k_hw struct
  *
  * @ah: The &struct ath5k_hw
  */
 void ath5k_hw_detach(struct ath5k_hw *ah)
 {
 	free(ah->ah_rf_banks);
 	ath5k_eeprom_detach(ah);
 	free(ah);
 }
	/*
	* Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
	* Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
	*
	* Modified for gPXE, July 2009, by Joshua Oreman <oremanj@rwcr.net>
	* Original from Linux kernel 2.6.30.
	*
	* 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.
	*
	*/

	FILE_LICENCE ( MIT );

	/*************************************\
	* Attach/Detach Functions and helpers *
	\*************************************/

	#include <gpxe/pci.h>
	#include <unistd.h>
	#include <stdlib.h>
	#include "ath5k.h"
	#include "reg.h"
	#include "base.h"

	/**
	* ath5k_hw_post - Power On Self Test helper function
	*
	* @ah: The &struct ath5k_hw
	*/
	static int ath5k_hw_post(struct ath5k_hw *ah)
	{

	static const u32 static_pattern[4] = {
	0x55555555, 0xaaaaaaaa,
	0x66666666, 0x99999999
	};
	static const u16 regs[2] = { AR5K_STA_ID0, AR5K_PHY(8) };
	int i, c;
	u16 cur_reg;
	u32 var_pattern;
	u32 init_val;
	u32 cur_val;

	for (c = 0; c < 2; c++) {

	cur_reg = regs[c];

	/* Save previous value */
	init_val = ath5k_hw_reg_read(ah, cur_reg);

	for (i = 0; i < 256; i++) {
	var_pattern = i << 16 \| i;
	ath5k_hw_reg_write(ah, var_pattern, cur_reg);
	cur_val = ath5k_hw_reg_read(ah, cur_reg);

	if (cur_val != var_pattern) {
	DBG("ath5k: POST failed!\n");
	return -EAGAIN;
	}

	/* Found on ndiswrapper dumps */
	var_pattern = 0x0039080f;
	ath5k_hw_reg_write(ah, var_pattern, cur_reg);
	}

	for (i = 0; i < 4; i++) {
	var_pattern = static_pattern[i];
	ath5k_hw_reg_write(ah, var_pattern, cur_reg);
	cur_val = ath5k_hw_reg_read(ah, cur_reg);

	if (cur_val != var_pattern) {
	DBG("ath5k: POST failed!\n");
	return -EAGAIN;
	}

	/* Found on ndiswrapper dumps */
	var_pattern = 0x003b080f;
	ath5k_hw_reg_write(ah, var_pattern, cur_reg);
	}

	/* Restore previous value */
	ath5k_hw_reg_write(ah, init_val, cur_reg);

	}

	return 0;

	}

	/**
	* ath5k_hw_attach - Check if hw is supported and init the needed structs
	*
	* @sc: The &struct ath5k_softc we got from the driver's attach function
	* @mac_version: The mac version id (check out ath5k.h) based on pci id
	* @hw: Returned newly allocated hardware structure, on success
	*
	* Check if the device is supported, perform a POST and initialize the needed
	* structs. Returns -ENOMEM if we don't have memory for the needed structs,
	* -ENODEV if the device is not supported or prints an error msg if something
	* else went wrong.
	*/
	int ath5k_hw_attach(struct ath5k_softc *sc, u8 mac_version,
	struct ath5k_hw **hw)
	{
	struct ath5k_hw *ah;
	struct pci_device *pdev = sc->pdev;
	int ret;
	u32 srev;

	ah = zalloc(sizeof(struct ath5k_hw));
	if (ah == NULL) {
	ret = -ENOMEM;
	DBG("ath5k: out of memory\n");
	goto err;
	}

	ah->ah_sc = sc;
	ah->ah_iobase = sc->iobase;

	/*
	* HW information
	*/
	ah->ah_turbo = 0;
	ah->ah_txpower.txp_tpc = 0;
	ah->ah_imr = 0;
	ah->ah_atim_window = 0;
	ah->ah_aifs = AR5K_TUNE_AIFS;
	ah->ah_cw_min = AR5K_TUNE_CWMIN;
	ah->ah_limit_tx_retries = AR5K_INIT_TX_RETRY;
	ah->ah_software_retry = 0;
	ah->ah_ant_diversity = AR5K_TUNE_ANT_DIVERSITY;

	/*
	* Set the mac version based on the pci id
	*/
	ah->ah_version = mac_version;

	/Fill the ath5k_hw struct with the needed functions/
	ret = ath5k_hw_init_desc_functions(ah);
	if (ret)
	goto err_free;

	/* Bring device out of sleep and reset it's units */
	ret = ath5k_hw_nic_wakeup(ah, CHANNEL_B, 1);
	if (ret)
	goto err_free;

	/* Get MAC, PHY and RADIO revisions */
	srev = ath5k_hw_reg_read(ah, AR5K_SREV);
	ah->ah_mac_srev = srev;
	ah->ah_mac_version = AR5K_REG_MS(srev, AR5K_SREV_VER);
	ah->ah_mac_revision = AR5K_REG_MS(srev, AR5K_SREV_REV);
	ah->ah_phy_revision = ath5k_hw_reg_read(ah, AR5K_PHY_CHIP_ID);
	ah->ah_radio_5ghz_revision = ath5k_hw_radio_revision(ah, CHANNEL_5GHZ);
	ah->ah_phy = AR5K_PHY(0);

	/* Try to identify radio chip based on it's srev */
	switch (ah->ah_radio_5ghz_revision & 0xf0) {
	case AR5K_SREV_RAD_5111:
	ah->ah_radio = AR5K_RF5111;
	ah->ah_single_chip = 0;
	ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
	CHANNEL_2GHZ);
	break;
	case AR5K_SREV_RAD_5112:
	case AR5K_SREV_RAD_2112:
	ah->ah_radio = AR5K_RF5112;
	ah->ah_single_chip = 0;
	ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
	CHANNEL_2GHZ);
	break;
	case AR5K_SREV_RAD_2413:
	ah->ah_radio = AR5K_RF2413;
	ah->ah_single_chip = 1;
	break;
	case AR5K_SREV_RAD_5413:
	ah->ah_radio = AR5K_RF5413;
	ah->ah_single_chip = 1;
	break;
	case AR5K_SREV_RAD_2316:
	ah->ah_radio = AR5K_RF2316;
	ah->ah_single_chip = 1;
	break;
	case AR5K_SREV_RAD_2317:
	ah->ah_radio = AR5K_RF2317;
	ah->ah_single_chip = 1;
	break;
	case AR5K_SREV_RAD_5424:
	if (ah->ah_mac_version == AR5K_SREV_AR2425 \|\|
	ah->ah_mac_version == AR5K_SREV_AR2417) {
	ah->ah_radio = AR5K_RF2425;
	} else {
	ah->ah_radio = AR5K_RF5413;
	}
	ah->ah_single_chip = 1;
	break;
	default:
	/* Identify radio based on mac/phy srev */
	if (ah->ah_version == AR5K_AR5210) {
	ah->ah_radio = AR5K_RF5110;
	ah->ah_single_chip = 0;
	} else if (ah->ah_version == AR5K_AR5211) {
	ah->ah_radio = AR5K_RF5111;
	ah->ah_single_chip = 0;
	ah->ah_radio_2ghz_revision = ath5k_hw_radio_revision(ah,
	CHANNEL_2GHZ);
	} else if (ah->ah_mac_version == (AR5K_SREV_AR2425 >> 4) \|\|
	ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4) \|\|
	ah->ah_phy_revision == AR5K_SREV_PHY_2425) {
	ah->ah_radio = AR5K_RF2425;
	ah->ah_single_chip = 1;
	ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2425;
	} else if (srev == AR5K_SREV_AR5213A &&
	ah->ah_phy_revision == AR5K_SREV_PHY_5212B) {
	ah->ah_radio = AR5K_RF5112;
	ah->ah_single_chip = 0;
	ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5112B;
	} else if (ah->ah_mac_version == (AR5K_SREV_AR2415 >> 4)) {
	ah->ah_radio = AR5K_RF2316;
	ah->ah_single_chip = 1;
	ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2316;
	} else if (ah->ah_mac_version == (AR5K_SREV_AR5414 >> 4) \|\|
	ah->ah_phy_revision == AR5K_SREV_PHY_5413) {
	ah->ah_radio = AR5K_RF5413;
	ah->ah_single_chip = 1;
	ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_5413;
	} else if (ah->ah_mac_version == (AR5K_SREV_AR2414 >> 4) \|\|
	ah->ah_phy_revision == AR5K_SREV_PHY_2413) {
	ah->ah_radio = AR5K_RF2413;
	ah->ah_single_chip = 1;
	ah->ah_radio_5ghz_revision = AR5K_SREV_RAD_2413;
	} else {
	DBG("ath5k: Couldn't identify radio revision.\n");
	ret = -ENOTSUP;
	goto err_free;
	}
	}

	/* Return on unsuported chips (unsupported eeprom etc) */
	if ((srev >= AR5K_SREV_AR5416) &&
	(srev < AR5K_SREV_AR2425)) {
	DBG("ath5k: Device not yet supported.\n");
	ret = -ENOTSUP;
	goto err_free;
	}

	/*
	* Write PCI-E power save settings
	*/
	if ((ah->ah_version == AR5K_AR5212) &&
	pci_find_capability(pdev, PCI_CAP_ID_EXP)) {
	ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES);
	ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES);
	/* Shut off RX when elecidle is asserted */
	ath5k_hw_reg_write(ah, 0x28000039, AR5K_PCIE_SERDES);
	ath5k_hw_reg_write(ah, 0x53160824, AR5K_PCIE_SERDES);
	/* TODO: EEPROM work */
	ath5k_hw_reg_write(ah, 0xe5980579, AR5K_PCIE_SERDES);
	/* Shut off PLL and CLKREQ active in L1 */
	ath5k_hw_reg_write(ah, 0x001defff, AR5K_PCIE_SERDES);
	/* Preserce other settings */
	ath5k_hw_reg_write(ah, 0x1aaabe40, AR5K_PCIE_SERDES);
	ath5k_hw_reg_write(ah, 0xbe105554, AR5K_PCIE_SERDES);
	ath5k_hw_reg_write(ah, 0x000e3007, AR5K_PCIE_SERDES);
	/* Reset SERDES to load new settings */
	ath5k_hw_reg_write(ah, 0x00000000, AR5K_PCIE_SERDES_RESET);
	mdelay(1);
	}

	/*
	* POST
	*/
	ret = ath5k_hw_post(ah);
	if (ret)
	goto err_free;

	/* Enable pci core retry fix on Hainan (5213A) and later chips */
	if (srev >= AR5K_SREV_AR5213A)
	ath5k_hw_reg_write(ah, AR5K_PCICFG_RETRY_FIX, AR5K_PCICFG);

	/*
	* Get card capabilities, calibration values etc
	* TODO: EEPROM work
	*/
	ret = ath5k_eeprom_init(ah);
	if (ret) {
	DBG("ath5k: unable to init EEPROM\n");
	goto err_free;
	}

	/* Get misc capabilities */
	ret = ath5k_hw_set_capabilities(ah);
	if (ret) {
	DBG("ath5k: unable to get device capabilities: 0x%04x\n",
	sc->pdev->device);
	goto err_free;
	}

	if (srev >= AR5K_SREV_AR2414) {
	ah->ah_combined_mic = 1;
	AR5K_REG_ENABLE_BITS(ah, AR5K_MISC_MODE,
	AR5K_MISC_MODE_COMBINED_MIC);
	}

	/* Set BSSID to bcast address: ff:ff:ff:ff:ff:ff for now */
	memset(ah->ah_bssid, 0xff, ETH_ALEN);
	ath5k_hw_set_associd(ah, ah->ah_bssid, 0);
	ath5k_hw_set_opmode(ah);

	ath5k_hw_rfgain_opt_init(ah);

	*hw = ah;
	return 0;
	err_free:
	free(ah);
	err:
	return ret;
	}

	/**
	* ath5k_hw_detach - Free the ath5k_hw struct
	*
	* @ah: The &struct ath5k_hw
	*/
	void ath5k_hw_detach(struct ath5k_hw *ah)
	{
	free(ah->ah_rf_banks);
	ath5k_eeprom_detach(ah);
	free(ah);
	}