diff options
author | Bruce Allan | 2012-12-05 07:25:58 +0100 |
---|---|---|
committer | Jeff Kirsher | 2013-01-16 06:47:20 +0100 |
commit | 4ddc48a9a5f3352343eb4725eb75f9ca38fa1559 (patch) | |
tree | 78caa2906cef8854115d7a778e1cf0b5069e1cb5 /drivers/net/ethernet/intel/e1000e | |
parent | e1000e: Invalid Image CSUM bit changed for I217 (diff) | |
download | kernel-qcow2-linux-4ddc48a9a5f3352343eb4725eb75f9ca38fa1559.tar.gz kernel-qcow2-linux-4ddc48a9a5f3352343eb4725eb75f9ca38fa1559.tar.xz kernel-qcow2-linux-4ddc48a9a5f3352343eb4725eb75f9ca38fa1559.zip |
e1000e: helper functions for accessing EMI registers
The Extended Management Interface (EMI) registers are accessed by first
writing the EMI register offset to the EMI_ADDR regiter and then either
reading or writing the data to/from the EMI_DATA register. Add helper
functions for performing these steps and convert existing EMI register
accesses accordingly.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/e1000e')
-rw-r--r-- | drivers/net/ethernet/intel/e1000e/ich8lan.c | 84 |
1 files changed, 65 insertions, 19 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c index 7d5f6b7856e6..8004d7113c39 100644 --- a/drivers/net/ethernet/intel/e1000e/ich8lan.c +++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c @@ -153,7 +153,7 @@ #define I82579_LPI_CTRL_ENABLE_MASK 0x6000 #define I82579_LPI_CTRL_FORCE_PLL_LOCK_COUNT 0x80 -/* EMI Registers */ +/* Extended Management Interface (EMI) Registers */ #define I82579_EMI_ADDR 0x10 #define I82579_EMI_DATA 0x11 #define I82579_LPI_UPDATE_TIMER 0x4805 /* in 40ns units + 40 ns base value */ @@ -789,6 +789,58 @@ static s32 e1000_init_mac_params_ich8lan(struct e1000_hw *hw) } /** + * __e1000_access_emi_reg_locked - Read/write EMI register + * @hw: pointer to the HW structure + * @addr: EMI address to program + * @data: pointer to value to read/write from/to the EMI address + * @read: boolean flag to indicate read or write + * + * This helper function assumes the SW/FW/HW Semaphore is already acquired. + **/ +static s32 __e1000_access_emi_reg_locked(struct e1000_hw *hw, u16 address, + u16 *data, bool read) +{ + s32 ret_val = 0; + + ret_val = e1e_wphy_locked(hw, I82579_EMI_ADDR, address); + if (ret_val) + return ret_val; + + if (read) + ret_val = e1e_rphy_locked(hw, I82579_EMI_DATA, data); + else + ret_val = e1e_wphy_locked(hw, I82579_EMI_DATA, *data); + + return ret_val; +} + +/** + * e1000_read_emi_reg_locked - Read Extended Management Interface register + * @hw: pointer to the HW structure + * @addr: EMI address to program + * @data: value to be read from the EMI address + * + * Assumes the SW/FW/HW Semaphore is already acquired. + **/ +static s32 e1000_read_emi_reg_locked(struct e1000_hw *hw, u16 addr, u16 *data) +{ + return __e1000_access_emi_reg_locked(hw, addr, data, true); +} + +/** + * e1000_write_emi_reg_locked - Write Extended Management Interface register + * @hw: pointer to the HW structure + * @addr: EMI address to program + * @data: value to be written to the EMI address + * + * Assumes the SW/FW/HW Semaphore is already acquired. + **/ +static s32 e1000_write_emi_reg_locked(struct e1000_hw *hw, u16 addr, u16 data) +{ + return __e1000_access_emi_reg_locked(hw, addr, &data, false); +} + +/** * e1000_set_eee_pchlan - Enable/disable EEE support * @hw: pointer to the HW structure * @@ -823,11 +875,11 @@ static s32 e1000_set_eee_pchlan(struct e1000_hw *hw) ret_val = hw->phy.ops.acquire(hw); if (ret_val) return ret_val; - ret_val = e1e_wphy_locked(hw, I82579_EMI_ADDR, - I217_EEE_LP_ABILITY); + ret_val = e1000_read_emi_reg_locked(hw, + I217_EEE_LP_ABILITY, + &dev_spec->eee_lp_ability); if (ret_val) goto release; - e1e_rphy_locked(hw, I82579_EMI_DATA, &dev_spec->eee_lp_ability); /* EEE is not supported in 100Half, so ignore partner's EEE * in 100 ability if full-duplex is not advertised. @@ -1987,18 +2039,12 @@ static s32 e1000_lv_phy_workarounds_ich8lan(struct e1000_hw *hw) ret_val = hw->phy.ops.acquire(hw); if (ret_val) return ret_val; - ret_val = e1e_wphy_locked(hw, I82579_EMI_ADDR, I82579_MSE_THRESHOLD); - if (ret_val) - goto release; /* set MSE higher to enable link to stay up when noise is high */ - ret_val = e1e_wphy_locked(hw, I82579_EMI_DATA, 0x0034); - if (ret_val) - goto release; - ret_val = e1e_wphy_locked(hw, I82579_EMI_ADDR, I82579_MSE_LINK_DOWN); + ret_val = e1000_write_emi_reg_locked(hw, I82579_MSE_THRESHOLD, 0x0034); if (ret_val) goto release; /* drop link after 5 times MSE threshold was reached */ - ret_val = e1e_wphy_locked(hw, I82579_EMI_DATA, 0x0005); + ret_val = e1000_write_emi_reg_locked(hw, I82579_MSE_LINK_DOWN, 0x0005); release: hw->phy.ops.release(hw); @@ -2172,10 +2218,9 @@ static s32 e1000_post_phy_reset_ich8lan(struct e1000_hw *hw) ret_val = hw->phy.ops.acquire(hw); if (ret_val) return ret_val; - ret_val = e1e_wphy_locked(hw, I82579_EMI_ADDR, - I82579_LPI_UPDATE_TIMER); - if (!ret_val) - ret_val = e1e_wphy_locked(hw, I82579_EMI_DATA, 0x1387); + ret_val = e1000_write_emi_reg_locked(hw, + I82579_LPI_UPDATE_TIMER, + 0x1387); hw->phy.ops.release(hw); } @@ -4013,11 +4058,12 @@ void e1000_suspend_workarounds_ich8lan(struct e1000_hw *hw) if (!dev_spec->eee_disable) { u16 eee_advert; - ret_val = e1e_wphy_locked(hw, I82579_EMI_ADDR, - I217_EEE_ADVERTISEMENT); + ret_val = + e1000_read_emi_reg_locked(hw, + I217_EEE_ADVERTISEMENT, + &eee_advert); if (ret_val) goto release; - e1e_rphy_locked(hw, I82579_EMI_DATA, &eee_advert); /* Disable LPLU if both link partners support 100BaseT * EEE and 100Full is advertised on both ends of the |