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/*
* Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
* Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
*
* Modified for iPXE, 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 <ipxe/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);
}