diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2010-11-17 04:25:33 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-11-18 14:22:23 -0500 |
| commit | a05b5d45049d60a06a1b12976150572304a51928 (patch) | |
| tree | b19006fab0ef546fcd40a1d3e30906348084f64c /drivers/net/wireless/ath/ath9k/pci.c | |
| parent | 458fafdd579dcb58c8288c55c9cd92d6816ba094 (diff) | |
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 <juhosg@openwrt.org>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/pci.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/pci.c | 42 |
1 files changed, 29 insertions, 13 deletions
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 <linux/nl80211.h> #include <linux/pci.h> +#include <linux/ath9k_platform.h> #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; } |