diff options
| author | Gabor Juhos <juhosg@openwrt.org> | 2009-01-14 20:17:08 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-01-29 16:00:33 -0500 |
| commit | 9dbeb91a8b97e2892c04461e28d2bdd0198b719d (patch) | |
| tree | 3ac42d298b739da86a991ed2bd53aa12377cb956 /drivers/net/wireless/ath9k/ahb.c | |
| parent | 09329d371e57ff9fcb645b8e2cdee1ec8b9b539f (diff) | |
| download | kernel-crypto-9dbeb91a8b97e2892c04461e28d2bdd0198b719d.tar.gz kernel-crypto-9dbeb91a8b97e2892c04461e28d2bdd0198b719d.tar.xz kernel-crypto-9dbeb91a8b97e2892c04461e28d2bdd0198b719d.zip | |
ath9k: get EEPROM contents from platform data on AHB bus
On the AR913x SOCs we have to provide EEPROM contents via platform_data,
because accessing the flash via MMIO is not safe. Additionally different
boards may store the radio calibration data at different locations.
Changes-licensed-under: ISC
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Tested-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath9k/ahb.c')
| -rw-r--r-- | drivers/net/wireless/ath9k/ahb.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath9k/ahb.c b/drivers/net/wireless/ath9k/ahb.c index 8cbd4c2a7fa..7f2c3a09bca 100644 --- a/drivers/net/wireless/ath9k/ahb.c +++ b/drivers/net/wireless/ath9k/ahb.c @@ -18,6 +18,7 @@ #include <linux/nl80211.h> #include <linux/platform_device.h> +#include <linux/ath9k_platform.h> #include "core.h" #include "reg.h" #include "hw.h" @@ -33,9 +34,29 @@ static void ath_ahb_cleanup(struct ath_softc *sc) iounmap(sc->mem); } +static bool ath_ahb_eeprom_read(struct ath_hal *ah, u32 off, u16 *data) +{ + struct ath_softc *sc = ah->ah_sc; + struct platform_device *pdev = to_platform_device(sc->dev); + struct ath9k_platform_data *pdata; + + pdata = (struct ath9k_platform_data *) pdev->dev.platform_data; + if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { + DPRINTF(ah->ah_sc, ATH_DBG_FATAL, + "%s: flash read failed, offset %08x is out of range\n", + __func__, off); + return false; + } + + *data = pdata->eeprom_data[off]; + return true; +} + static struct ath_bus_ops ath_ahb_bus_ops = { .read_cachesize = ath_ahb_read_cachesize, .cleanup = ath_ahb_cleanup, + + .eeprom_read = ath_ahb_eeprom_read, }; static int ath_ahb_probe(struct platform_device *pdev) @@ -48,6 +69,12 @@ static int ath_ahb_probe(struct platform_device *pdev) int ret = 0; struct ath_hal *ah; + if (!pdev->dev.platform_data) { + dev_err(&pdev->dev, "no platform data specified\n"); + ret = -EINVAL; + goto err_out; + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "no memory resource found\n"); |