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ath9k: allow to load EEPROM content via firmware API

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The calibration data for devices w/o a separate
EEPROM chip can be specified via the 'eeprom_data'
field of 'ath9k_platform_data'. The 'eeprom_data'
is usually filled from board specific setup
functions. It is easy if the EEPROM data is mapped
to the memory, but it can be complicated if it is
stored elsewhere.

The patch adds support for loading of the EEPROM
data via the firmware API to avoid this limitation.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gabor Juhos
2012-12-10 15:30:28 +01:00
committed by John W. Linville
parent 0e4b9f2f12
commit ab5c4f71d8
4 changed files with 82 additions and 2 deletions
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19
drivers/net/wireless/ath/ath9k/eeprom.c
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@@ -113,12 +113,29 @@ void ath9k_hw_usb_gen_fill_eeprom(struct ath_hw *ah, u16 *eep_data,
}
}
static bool ath9k_hw_nvram_read_blob(struct ath_hw *ah, u32 off,
u16 *data)
{
u16 *blob_data;
if (off * sizeof(u16) > ah->eeprom_blob->size)
return false;
blob_data = (u16 *)ah->eeprom_blob->data;
*data = blob_data[off];
return true;
}
bool ath9k_hw_nvram_read(struct ath_hw *ah, u32 off, u16 *data)
{
struct ath_common *common = ath9k_hw_common(ah);
bool ret;
ret = common->bus_ops->eeprom_read(common, off, data);
if (ah->eeprom_blob)
ret = ath9k_hw_nvram_read_blob(ah, off, data);
else
ret = common->bus_ops->eeprom_read(common, off, data);
if (!ret)
ath_dbg(common, EEPROM,
"unable to read eeprom region at offset %u\n", off);