92 lines
2.7 KiB
Diff
92 lines
2.7 KiB
Diff
From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 18 Oct 2014 18:24:15 +0200
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Subject: [PATCH] ath9k: add support for endian swap of eeprom from
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platform data
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On some devices (especially little-endian ones), the flash EEPROM data
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has a different endian, which needs to be detected.
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Add a flag to the platform data to allow overriding that behavior
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/drivers/net/wireless/ath/ath9k/eeprom_def.c
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+++ b/drivers/net/wireless/ath/ath9k/eeprom_def.c
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@@ -262,7 +262,7 @@ static int ath9k_hw_def_check_eeprom(str
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{
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struct ar5416_eeprom_def *eep = &ah->eeprom.def;
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struct ath_common *common = ath9k_hw_common(ah);
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- u16 *eepdata, temp, magic, magic2;
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+ u16 *eepdata, temp, magic;
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u32 sum = 0, el;
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bool need_swap = false;
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int i, addr, size;
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@@ -272,27 +272,16 @@ static int ath9k_hw_def_check_eeprom(str
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return false;
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}
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- if (!ath9k_hw_use_flash(ah)) {
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- ath_dbg(common, EEPROM, "Read Magic = 0x%04X\n", magic);
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-
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- if (magic != AR5416_EEPROM_MAGIC) {
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- magic2 = swab16(magic);
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-
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- if (magic2 == AR5416_EEPROM_MAGIC) {
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- size = sizeof(struct ar5416_eeprom_def);
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- need_swap = true;
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- eepdata = (u16 *) (&ah->eeprom);
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-
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- for (addr = 0; addr < size / sizeof(u16); addr++) {
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- temp = swab16(*eepdata);
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- *eepdata = temp;
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- eepdata++;
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- }
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- } else {
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- ath_err(common,
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- "Invalid EEPROM Magic. Endianness mismatch.\n");
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- return -EINVAL;
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- }
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+ if (swab16(magic) == AR5416_EEPROM_MAGIC &&
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+ !(ah->ah_flags & AH_NO_EEP_SWAP)) {
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+ size = sizeof(struct ar5416_eeprom_def);
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+ need_swap = true;
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+ eepdata = (u16 *) (&ah->eeprom);
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+
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+ for (addr = 0; addr < size / sizeof(u16); addr++) {
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+ temp = swab16(*eepdata);
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+ *eepdata = temp;
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+ eepdata++;
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}
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}
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--- a/drivers/net/wireless/ath/ath9k/hw.h
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+++ b/drivers/net/wireless/ath/ath9k/hw.h
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@@ -731,6 +731,7 @@ enum ath_cal_list {
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#define AH_USE_EEPROM 0x1
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#define AH_UNPLUGGED 0x2 /* The card has been physically removed. */
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#define AH_FASTCC 0x4
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+#define AH_NO_EEP_SWAP 0x8 /* Do not swap EEPROM data */
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struct ath_hw {
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struct ath_ops reg_ops;
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--- a/drivers/net/wireless/ath/ath9k/init.c
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+++ b/drivers/net/wireless/ath/ath9k/init.c
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@@ -531,6 +531,8 @@ static int ath9k_init_softc(u16 devid, s
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ah->is_clk_25mhz = pdata->is_clk_25mhz;
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ah->get_mac_revision = pdata->get_mac_revision;
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ah->external_reset = pdata->external_reset;
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+ if (!pdata->endian_check)
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+ ah->ah_flags |= AH_NO_EEP_SWAP;
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}
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common->ops = &ah->reg_ops;
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--- a/include/linux/ath9k_platform.h
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+++ b/include/linux/ath9k_platform.h
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@@ -31,6 +31,7 @@ struct ath9k_platform_data {
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u32 gpio_mask;
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u32 gpio_val;
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+ bool endian_check;
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bool is_clk_25mhz;
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bool tx_gain_buffalo;
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