From c38e7a9348f725be0ea2493454db9e6d44fb7e0c Mon Sep 17 00:00:00 2001 From: Nick Kossifidis Date: Mon, 10 Aug 2009 03:26:55 +0300 Subject: [PATCH] ath5k: Check EEPROM before tweaking SERDES * Read PCI-E infos offset from EEPROM and if it points to serdes section (0x40), enable serdes programming (further tweaking of serdes values during attach). This follows Legacy and Sam's HAL sources. Signed-off-by: Nick Kossifidis Acked-by: Bob Copeland Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/attach.c | 56 +++++++++++++++---------- drivers/net/wireless/ath/ath5k/eeprom.c | 10 +++++ drivers/net/wireless/ath/ath5k/eeprom.h | 4 ++ 3 files changed, 48 insertions(+), 22 deletions(-) diff --git a/drivers/net/wireless/ath/ath5k/attach.c b/drivers/net/wireless/ath/ath5k/attach.c index 9a84d9410b27..626306592cf8 100644 --- a/drivers/net/wireless/ath/ath5k/attach.c +++ b/drivers/net/wireless/ath/ath5k/attach.c @@ -252,28 +252,6 @@ struct ath5k_hw *ath5k_hw_attach(struct ath5k_softc *sc, u8 mac_version) goto err_free; } - /* - * Write PCI-E power save settings - */ - if ((ah->ah_version == AR5K_AR5212) && (pdev->is_pcie)) { - ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES); - ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES); - /* Shut off RX when elecidle is asserted */ - ath5k_hw_reg_write(ah, 0x28000039, AR5K_PCIE_SERDES); - ath5k_hw_reg_write(ah, 0x53160824, AR5K_PCIE_SERDES); - /* TODO: EEPROM work */ - ath5k_hw_reg_write(ah, 0xe5980579, AR5K_PCIE_SERDES); - /* Shut off PLL and CLKREQ active in L1 */ - ath5k_hw_reg_write(ah, 0x001defff, AR5K_PCIE_SERDES); - /* Preserce other settings */ - ath5k_hw_reg_write(ah, 0x1aaabe40, AR5K_PCIE_SERDES); - ath5k_hw_reg_write(ah, 0xbe105554, AR5K_PCIE_SERDES); - ath5k_hw_reg_write(ah, 0x000e3007, AR5K_PCIE_SERDES); - /* Reset SERDES to load new settings */ - ath5k_hw_reg_write(ah, 0x00000000, AR5K_PCIE_SERDES_RESET); - mdelay(1); - } - /* * POST */ @@ -295,6 +273,40 @@ struct ath5k_hw *ath5k_hw_attach(struct ath5k_softc *sc, u8 mac_version) goto err_free; } + /* + * Write PCI-E power save settings + */ + if ((ah->ah_version == AR5K_AR5212) && (pdev->is_pcie)) { + struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; + + ath5k_hw_reg_write(ah, 0x9248fc00, AR5K_PCIE_SERDES); + ath5k_hw_reg_write(ah, 0x24924924, AR5K_PCIE_SERDES); + + /* Shut off RX when elecidle is asserted */ + ath5k_hw_reg_write(ah, 0x28000039, AR5K_PCIE_SERDES); + ath5k_hw_reg_write(ah, 0x53160824, AR5K_PCIE_SERDES); + + /* If serdes programing is enabled, increase PCI-E + * tx power for systems with long trace from host + * to minicard connector. */ + if (ee->ee_serdes) + ath5k_hw_reg_write(ah, 0xe5980579, AR5K_PCIE_SERDES); + else + ath5k_hw_reg_write(ah, 0xf6800579, AR5K_PCIE_SERDES); + + /* Shut off PLL and CLKREQ active in L1 */ + ath5k_hw_reg_write(ah, 0x001defff, AR5K_PCIE_SERDES); + + /* Preserve other settings */ + ath5k_hw_reg_write(ah, 0x1aaabe40, AR5K_PCIE_SERDES); + ath5k_hw_reg_write(ah, 0xbe105554, AR5K_PCIE_SERDES); + ath5k_hw_reg_write(ah, 0x000e3007, AR5K_PCIE_SERDES); + + /* Reset SERDES to load new settings */ + ath5k_hw_reg_write(ah, 0x00000000, AR5K_PCIE_SERDES_RESET); + mdelay(1); + } + /* Get misc capabilities */ ret = ath5k_hw_set_capabilities(ah); if (ret) { diff --git a/drivers/net/wireless/ath/ath5k/eeprom.c b/drivers/net/wireless/ath/ath5k/eeprom.c index c56b494d417a..8af477dd6fc7 100644 --- a/drivers/net/wireless/ath/ath5k/eeprom.c +++ b/drivers/net/wireless/ath/ath5k/eeprom.c @@ -167,6 +167,16 @@ ath5k_eeprom_init_header(struct ath5k_hw *ah) ee->ee_rfkill_pin = (u8) AR5K_REG_MS(val, AR5K_EEPROM_RFKILL_GPIO_SEL); ee->ee_rfkill_pol = val & AR5K_EEPROM_RFKILL_POLARITY ? true : false; + /* Check if PCIE_OFFSET points to PCIE_SERDES_SECTION + * and enable serdes programming if needed. + * + * XXX: Serdes values seem to be fixed so + * no need to read them here, we write them + * during ath5k_hw_attach */ + AR5K_EEPROM_READ(AR5K_EEPROM_PCIE_OFFSET, val); + ee->ee_serdes = (val == AR5K_EEPROM_PCIE_SERDES_SECTION) ? + true : false; + return 0; } diff --git a/drivers/net/wireless/ath/ath5k/eeprom.h b/drivers/net/wireless/ath/ath5k/eeprom.h index 64be73a5edae..0123f3521a0b 100644 --- a/drivers/net/wireless/ath/ath5k/eeprom.h +++ b/drivers/net/wireless/ath/ath5k/eeprom.h @@ -19,6 +19,9 @@ /* * Common ar5xxx EEPROM data offsets (set these on AR5K_EEPROM_BASE) */ +#define AR5K_EEPROM_PCIE_OFFSET 0x02 /* Contains offset to PCI-E infos */ +#define AR5K_EEPROM_PCIE_SERDES_SECTION 0x40 /* PCIE_OFFSET points here when + * SERDES infos are present */ #define AR5K_EEPROM_MAGIC 0x003d /* EEPROM Magic number */ #define AR5K_EEPROM_MAGIC_VALUE 0x5aa5 /* Default - found on EEPROM */ #define AR5K_EEPROM_MAGIC_5212 0x0000145c /* 5212 */ @@ -391,6 +394,7 @@ struct ath5k_eeprom_info { u8 ee_rfkill_pin; bool ee_rfkill_pol; bool ee_is_hb63; + bool ee_serdes; u16 ee_misc0; u16 ee_misc1; u16 ee_misc2; -- 2.30.2