From a05b5d45049d60a06a1b12976150572304a51928 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 17 Nov 2010 04:25:33 +0100 Subject: [PATCH] ath9k: add support for reading eeprom from platform data on PCI devices Some embedded boards store platform data for connected PCIe AR92xx chips in the system flash instead of a separate EEPROM chip. Signed-off-by: Gabor Juhos Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/hw.c | 4 --- drivers/net/wireless/ath/ath9k/init.c | 3 +++ drivers/net/wireless/ath/ath9k/pci.c | 38 +++++++++++++++++++-------- 3 files changed, 30 insertions(+), 15 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 75e23632b968..5a13a761c30c 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -419,10 +419,6 @@ static void ath9k_hw_init_defaults(struct ath_hw *ah) ah->hw_version.magic = AR5416_MAGIC; ah->hw_version.subvendorid = 0; - ah->ah_flags = 0; - if (!AR_SREV_9100(ah)) - ah->ah_flags = AH_USE_EEPROM; - ah->atim_window = 0; ah->sta_id1_defaults = AR_STA_ID1_CRPT_MIC_ENABLE | diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index 498f62180f1c..e7764ce881df 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -530,6 +530,9 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid, ah->hw_version.subsysid = subsysid; sc->sc_ah = ah; + if (!sc->dev->platform_data) + ah->ah_flags |= AH_USE_EEPROM; + common = ath9k_hw_common(ah); common->ops = &ath9k_common_ops; common->bus_ops = bus_ops; diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c index 6605bc2c2036..09f69a9617f4 100644 --- a/drivers/net/wireless/ath/ath9k/pci.c +++ b/drivers/net/wireless/ath/ath9k/pci.c @@ -16,6 +16,7 @@ #include #include +#include #include "ath9k.h" static DEFINE_PCI_DEVICE_TABLE(ath_pci_id_table) = { @@ -53,21 +54,36 @@ static void ath_pci_read_cachesize(struct ath_common *common, int *csz) static bool ath_pci_eeprom_read(struct ath_common *common, u32 off, u16 *data) { - struct ath_hw *ah = (struct ath_hw *) common->ah; + struct ath_softc *sc = (struct ath_softc *) common->priv; + struct ath9k_platform_data *pdata = sc->dev->platform_data; - common->ops->read(ah, AR5416_EEPROM_OFFSET + (off << AR5416_EEPROM_S)); + if (pdata) { + if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { + ath_print(common, ATH_DBG_FATAL, + "%s: eeprom read failed, offset %08x " + "is out of range\n", + __func__, off); + } - if (!ath9k_hw_wait(ah, - AR_EEPROM_STATUS_DATA, - AR_EEPROM_STATUS_DATA_BUSY | - AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0, - AH_WAIT_TIMEOUT)) { - return false; + *data = pdata->eeprom_data[off]; + } else { + struct ath_hw *ah = (struct ath_hw *) common->ah; + + common->ops->read(ah, AR5416_EEPROM_OFFSET + + (off << AR5416_EEPROM_S)); + + if (!ath9k_hw_wait(ah, + AR_EEPROM_STATUS_DATA, + AR_EEPROM_STATUS_DATA_BUSY | + AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0, + AH_WAIT_TIMEOUT)) { + return false; + } + + *data = MS(common->ops->read(ah, AR_EEPROM_STATUS_DATA), + AR_EEPROM_STATUS_DATA_VAL); } - *data = MS(common->ops->read(ah, AR_EEPROM_STATUS_DATA), - AR_EEPROM_STATUS_DATA_VAL); - return true; }