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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>
This commit is contained in:
Felix Fietkau 2010-11-17 04:25:33 +01:00 committed by John W. Linville
parent 458fafdd57
commit a05b5d4504
3 changed files with 30 additions and 15 deletions
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4
drivers/net/wireless/ath/ath9k/hw.c
View File

@ -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 |

3
drivers/net/wireless/ath/ath9k/init.c
View File

@ -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;

38
drivers/net/wireless/ath/ath9k/pci.c
View File

@ -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;
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;
}