From a05b5d45049d60a06a1b12976150572304a51928 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 17 Nov 2010 04:25:33 +0100 Subject: 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/pci.c | 42 +++++++++++++++++++++++++----------- 1 file changed, 29 insertions(+), 13 deletions(-) (limited to 'drivers/net/wireless/ath/ath9k/pci.c') diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c index 6605bc2c203..09f69a9617f 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; - - 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; + struct ath_softc *sc = (struct ath_softc *) common->priv; + struct ath9k_platform_data *pdata = sc->dev->platform_data; + + 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); + } + + *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; } -- cgit v1.2.3