LinuxLists.cc - [PATCH 1/2] ath9k: add support for reading eeprom from platform data on PCI devices

2010-11-17 03:19:56

Subject: [PATCH 1/2] ath9k: add support for reading eeprom from platform data on PCI devices

2010-11-17 03:25:35

Subject: [PATCH v2 1/2] 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 <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
---
drivers/net/wireless/ath/ath9k/hw.c | 4 ---
drivers/net/wireless/ath/ath9k/init.c | 3 ++
drivers/net/wireless/ath/ath9k/pci.c | 42 ++++++++++++++++++++++----------
3 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 986c779..1dbe53b 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -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 |
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 5c26818d..7eef1fa 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -533,6 +533,9 @@ 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;
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index 6605bc2..09f69a9 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;
}

2010-11-17 03:19:52

by Felix Fietkau

[permalink] [raw]

Subject: [PATCH 2/2] ath9k_hw: support reading calibration data from flash on AR9003

Embedded boards do not have compressed EEPROM data, they use the
struct ar9003_eeprom layout, with little endian fields, so copying
the raw data to the eeprom buffer is enough.

Signed-off-by: Felix Fietkau <[email protected]>
---
drivers/net/wireless/ath/ath9k/ar9003_eeprom.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
index 230a122..9a7e151 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -3271,6 +3271,18 @@ static bool ar9300_check_eeprom_header(struct ath_hw *ah, eeprom_read_op read,
return ar9300_check_header(header);
}

+static int ar9300_eeprom_restore_flash(struct ath_hw *ah, u8 *mptr,
+ int mdata_size)
+{
+ struct ath_common *common = ath9k_hw_common(ah);
+ u16 *data = (u16 *) mptr;
+ int i;
+
+ for (i = 0; i < mdata_size / 2; i++, data++)
+ ath9k_hw_nvram_read(common, i, data);
+
+ return 0;
+}
/*
* Read the configuration data from the eeprom.
* The data can be put in any specified memory buffer.
@@ -3293,6 +3305,9 @@ static int ar9300_eeprom_restore_internal(struct ath_hw *ah,
struct ath_common *common = ath9k_hw_common(ah);
eeprom_read_op read;

+ if (ath9k_hw_use_flash(ah))
+ return ar9300_eeprom_restore_flash(ah, mptr, mdata_size);
+
word = kzalloc(2048, GFP_KERNEL);
if (!word)
return -1;
--
1.7.3.2