diff options
Diffstat (limited to 'drivers/net/igb/e1000_82575.c')
| -rw-r--r-- | drivers/net/igb/e1000_82575.c | 1269 |
1 files changed, 1269 insertions, 0 deletions
diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c new file mode 100644 index 00000000000..cda3ec87909 --- /dev/null +++ b/drivers/net/igb/e1000_82575.c @@ -0,0 +1,1269 @@ +/******************************************************************************* + + Intel(R) Gigabit Ethernet Linux driver + Copyright(c) 2007 Intel Corporation. + + This program is free software; you can redistribute it and/or modify it + under the terms and conditions of the GNU General Public License, + version 2, as published by the Free Software Foundation. + + This program is distributed in the hope it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + more details. + + You should have received a copy of the GNU General Public License along with + this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + + The full GNU General Public License is included in this distribution in + the file called "COPYING". + + Contact Information: + e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> + Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 + +*******************************************************************************/ + +/* e1000_82575 + * e1000_82576 + */ + +#include <linux/types.h> +#include <linux/slab.h> + +#include "e1000_mac.h" +#include "e1000_82575.h" + +static s32 igb_get_invariants_82575(struct e1000_hw *); +static s32 igb_acquire_phy_82575(struct e1000_hw *); +static void igb_release_phy_82575(struct e1000_hw *); +static s32 igb_acquire_nvm_82575(struct e1000_hw *); +static void igb_release_nvm_82575(struct e1000_hw *); +static s32 igb_check_for_link_82575(struct e1000_hw *); +static s32 igb_get_cfg_done_82575(struct e1000_hw *); +static s32 igb_init_hw_82575(struct e1000_hw *); +static s32 igb_phy_hw_reset_sgmii_82575(struct e1000_hw *); +static s32 igb_read_phy_reg_sgmii_82575(struct e1000_hw *, u32, u16 *); +static void igb_rar_set_82575(struct e1000_hw *, u8 *, u32); +static s32 igb_reset_hw_82575(struct e1000_hw *); +static s32 igb_set_d0_lplu_state_82575(struct e1000_hw *, bool); +static s32 igb_setup_copper_link_82575(struct e1000_hw *); +static s32 igb_setup_fiber_serdes_link_82575(struct e1000_hw *); +static s32 igb_write_phy_reg_sgmii_82575(struct e1000_hw *, u32, u16); +static void igb_clear_hw_cntrs_82575(struct e1000_hw *); +static s32 igb_acquire_swfw_sync_82575(struct e1000_hw *, u16); +static s32 igb_configure_pcs_link_82575(struct e1000_hw *); +static s32 igb_get_pcs_speed_and_duplex_82575(struct e1000_hw *, u16 *, + u16 *); +static s32 igb_get_phy_id_82575(struct e1000_hw *); +static void igb_release_swfw_sync_82575(struct e1000_hw *, u16); +static bool igb_sgmii_active_82575(struct e1000_hw *); +static s32 igb_reset_init_script_82575(struct e1000_hw *); +static s32 igb_read_mac_addr_82575(struct e1000_hw *); + + +struct e1000_dev_spec_82575 { + bool sgmii_active; +}; + +static s32 igb_get_invariants_82575(struct e1000_hw *hw) +{ + struct e1000_phy_info *phy = &hw->phy; + struct e1000_nvm_info *nvm = &hw->nvm; + struct e1000_mac_info *mac = &hw->mac; + struct e1000_dev_spec_82575 *dev_spec; + u32 eecd; + s32 ret_val; + u16 size; + u32 ctrl_ext = 0; + + switch (hw->device_id) { + case E1000_DEV_ID_82575EB_COPPER: + case E1000_DEV_ID_82575EB_FIBER_SERDES: + case E1000_DEV_ID_82575GB_QUAD_COPPER: + mac->type = e1000_82575; + break; + default: + return -E1000_ERR_MAC_INIT; + break; + } + + /* MAC initialization */ + hw->dev_spec_size = sizeof(struct e1000_dev_spec_82575); + + /* Device-specific structure allocation */ + hw->dev_spec = kzalloc(hw->dev_spec_size, GFP_KERNEL); + + if (!hw->dev_spec) + return -ENOMEM; + + dev_spec = (struct e1000_dev_spec_82575 *)hw->dev_spec; + + /* Set media type */ + /* + * The 82575 uses bits 22:23 for link mode. The mode can be changed + * based on the EEPROM. We cannot rely upon device ID. There + * is no distinguishable difference between fiber and internal + * SerDes mode on the 82575. There can be an external PHY attached + * on the SGMII interface. For this, we'll set sgmii_active to true. + */ + phy->media_type = e1000_media_type_copper; + dev_spec->sgmii_active = false; + + ctrl_ext = rd32(E1000_CTRL_EXT); + if ((ctrl_ext & E1000_CTRL_EXT_LINK_MODE_MASK) == + E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES) { + hw->phy.media_type = e1000_media_type_internal_serdes; + ctrl_ext |= E1000_CTRL_I2C_ENA; + } else if (ctrl_ext & E1000_CTRL_EXT_LINK_MODE_SGMII) { + dev_spec->sgmii_active = true; + ctrl_ext |= E1000_CTRL_I2C_ENA; + } else { + ctrl_ext &= ~E1000_CTRL_I2C_ENA; + } + wr32(E1000_CTRL_EXT, ctrl_ext); + + /* Set mta register count */ + mac->mta_reg_count = 128; + /* Set rar entry count */ + mac->rar_entry_count = E1000_RAR_ENTRIES_82575; + /* Set if part includes ASF firmware */ + mac->asf_firmware_present = true; + /* Set if manageability features are enabled. */ + mac->arc_subsystem_valid = + (rd32(E1000_FWSM) & E1000_FWSM_MODE_MASK) + ? true : false; + + /* physical interface link setup */ + mac->ops.setup_physical_interface = + (hw->phy.media_type == e1000_media_type_copper) + ? igb_setup_copper_link_82575 + : igb_setup_fiber_serdes_link_82575; + + /* NVM initialization */ + eecd = rd32(E1000_EECD); + + nvm->opcode_bits = 8; + nvm->delay_usec = 1; + switch (nvm->override) { + case e1000_nvm_override_spi_large: + nvm->page_size = 32; + nvm->address_bits = 16; + break; + case e1000_nvm_override_spi_small: + nvm->page_size = 8; + nvm->address_bits = 8; + break; + default: + nvm->page_size = eecd & E1000_EECD_ADDR_BITS ? 32 : 8; + nvm->address_bits = eecd & E1000_EECD_ADDR_BITS ? 16 : 8; + break; + } + + nvm->type = e1000_nvm_eeprom_spi; + + size = (u16)((eecd & E1000_EECD_SIZE_EX_MASK) >> + E1000_EECD_SIZE_EX_SHIFT); + + /* + * Added to a constant, "size" becomes the left-shift value + * for setting word_size. + */ + size += NVM_WORD_SIZE_BASE_SHIFT; + nvm->word_size = 1 << size; + + /* setup PHY parameters */ + if (phy->media_type != e1000_media_type_copper) { + phy->type = e1000_phy_none; + return 0; + } + + phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT; + phy->reset_delay_us = 100; + + /* PHY function pointers */ + if (igb_sgmii_active_82575(hw)) { + phy->ops.reset_phy = igb_phy_hw_reset_sgmii_82575; + phy->ops.read_phy_reg = igb_read_phy_reg_sgmii_82575; + phy->ops.write_phy_reg = igb_write_phy_reg_sgmii_82575; + } else { + phy->ops.reset_phy = igb_phy_hw_reset; + phy->ops.read_phy_reg = igb_read_phy_reg_igp; + phy->ops.write_phy_reg = igb_write_phy_reg_igp; + } + + /* Set phy->phy_addr and phy->id. */ + ret_val = igb_get_phy_id_82575(hw); + if (ret_val) + return ret_val; + + /* Verify phy id and set remaining function pointers */ + switch (phy->id) { + case M88E1111_I_PHY_ID: + phy->type = e1000_phy_m88; + phy->ops.get_phy_info = igb_get_phy_info_m88; + phy->ops.get_cable_length = igb_get_cable_length_m88; + phy->ops.force_speed_duplex = igb_phy_force_speed_duplex_m88; + break; + case IGP03E1000_E_PHY_ID: + phy->type = e1000_phy_igp_3; + phy->ops.get_phy_info = igb_get_phy_info_igp; + phy->ops.get_cable_length = igb_get_cable_length_igp_2; + phy->ops.force_speed_duplex = igb_phy_force_speed_duplex_igp; + phy->ops.set_d0_lplu_state = igb_set_d0_lplu_state_82575; + phy->ops.set_d3_lplu_state = igb_set_d3_lplu_state; + break; + default: + return -E1000_ERR_PHY; + } + + return 0; +} + +/** + * e1000_acquire_phy_82575 - Acquire rights to access PHY + * @hw: pointer to the HW structure + * + * Acquire access rights to the correct PHY. This is a + * function pointer entry point called by the api module. + **/ +static s32 igb_acquire_phy_82575(struct e1000_hw *hw) +{ + u16 mask; + + mask = hw->bus.func ? E1000_SWFW_PHY1_SM : E1000_SWFW_PHY0_SM; + + return igb_acquire_swfw_sync_82575(hw, mask); +} + +/** + * e1000_release_phy_82575 - Release rights to access PHY + * @hw: pointer to the HW structure + * + * A wrapper to release access rights to the correct PHY. This is a + * function pointer entry point called by the api module. + **/ +static void igb_release_phy_82575(struct e1000_hw *hw) +{ + u16 mask; + + mask = hw->bus.func ? E1000_SWFW_PHY1_SM : E1000_SWFW_PHY0_SM; + igb_release_swfw_sync_82575(hw, mask); +} + +/** + * e1000_read_phy_reg_sgmii_82575 - Read PHY register using sgmii + * @hw: pointer to the HW structure + * @offset: register offset to be read + * @data: pointer to the read data + * + * Reads the PHY register at offset using the serial gigabit media independent + * interface and stores the retrieved information in data. + **/ +static s32 igb_read_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset, + u16 *data) +{ + struct e1000_phy_info *phy = &hw->phy; + u32 i, i2ccmd = 0; + + if (offset > E1000_MAX_SGMII_PHY_REG_ADDR) { + hw_dbg(hw, "PHY Address %u is out of range\n", offset); + return -E1000_ERR_PARAM; + } + + /* + * Set up Op-code, Phy Address, and register address in the I2CCMD + * register. The MAC will take care of interfacing with the + * PHY to retrieve the desired data. + */ + i2ccmd = ((offset << E1000_I2CCMD_REG_ADDR_SHIFT) | + (phy->addr << E1000_I2CCMD_PHY_ADDR_SHIFT) | + (E1000_I2CCMD_OPCODE_READ)); + + wr32(E1000_I2CCMD, i2ccmd); + + /* Poll the ready bit to see if the I2C read completed */ + for (i = 0; i < E1000_I2CCMD_PHY_TIMEOUT; i++) { + udelay(50); + i2ccmd = rd32(E1000_I2CCMD); + if (i2ccmd & E1000_I2CCMD_READY) + break; + } + if (!(i2ccmd & E1000_I2CCMD_READY)) { + hw_dbg(hw, "I2CCMD Read did not complete\n"); + return -E1000_ERR_PHY; + } + if (i2ccmd & E1000_I2CCMD_ERROR) { + hw_dbg(hw, "I2CCMD Error bit set\n"); + return -E1000_ERR_PHY; + } + + /* Need to byte-swap the 16-bit value. */ + *data = ((i2ccmd >> 8) & 0x00FF) | ((i2ccmd << 8) & 0xFF00); + + return 0; +} + +/** + * e1000_write_phy_reg_sgmii_82575 - Write PHY register using sgmii + * @hw: pointer to the HW structure + * @offset: register offset to write to + * @data: data to write at register offset + * + * Writes the data to PHY register at the offset using the serial gigabit + * media independent interface. + **/ +static s32 igb_write_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset, + u16 data) +{ + struct e1000_phy_info *phy = &hw->phy; + u32 i, i2ccmd = 0; + u16 phy_data_swapped; + + if (offset > E1000_MAX_SGMII_PHY_REG_ADDR) { + hw_dbg(hw, "PHY Address %d is out of range\n", offset); + return -E1000_ERR_PARAM; + } + + /* Swap the data bytes for the I2C interface */ + phy_data_swapped = ((data >> 8) & 0x00FF) | ((data << 8) & 0xFF00); + + /* + * Set up Op-code, Phy Address, and register address in the I2CCMD + * register. The MAC will take care of interfacing with the + * PHY to retrieve the desired data. + */ + i2ccmd = ((offset << E1000_I2CCMD_REG_ADDR_SHIFT) | + (phy->addr << E1000_I2CCMD_PHY_ADDR_SHIFT) | + E1000_I2CCMD_OPCODE_WRITE | + phy_data_swapped); + + wr32(E1000_I2CCMD, i2ccmd); + + /* Poll the ready bit to see if the I2C read completed */ + for (i = 0; i < E1000_I2CCMD_PHY_TIMEOUT; i++) { + udelay(50); + i2ccmd = rd32(E1000_I2CCMD); + if (i2ccmd & E1000_I2CCMD_READY) + break; + } + if (!(i2ccmd & E1000_I2CCMD_READY)) { + hw_dbg(hw, "I2CCMD Write did not complete\n"); + return -E1000_ERR_PHY; + } + if (i2ccmd & E1000_I2CCMD_ERROR) { + hw_dbg(hw, "I2CCMD Error bit set\n"); + return -E1000_ERR_PHY; + } + + return 0; +} + +/** + * e1000_get_phy_id_82575 - Retreive PHY addr and id + * @hw: pointer to the HW structure + * + * Retreives the PHY address and ID for both PHY's which do and do not use + * sgmi interface. + **/ +static s32 igb_get_phy_id_82575(struct e1000_hw *hw) +{ + struct e1000_phy_info *phy = &hw->phy; + s32 ret_val = 0; + u16 phy_id; + + /* + * For SGMII PHYs, we try the list of possible addresses until + * we find one that works. For non-SGMII PHYs + * (e.g. integrated copper PHYs), an address of 1 should + * work. The result of this function should mean phy->phy_addr + * and phy->id are set correctly. + */ + if (!(igb_sgmii_active_82575(hw))) { + phy->addr = 1; + ret_val = igb_get_phy_id(hw); + goto out; + } + + /* + * The address field in the I2CCMD register is 3 bits and 0 is invalid. + * Therefore, we need to test 1-7 + */ + for (phy->addr = 1; phy->addr < 8; phy->addr++) { + ret_val = igb_read_phy_reg_sgmii_82575(hw, PHY_ID1, &phy_id); + if (ret_val == 0) { + hw_dbg(hw, "Vendor ID 0x%08X read at address %u\n", + phy_id, + phy->addr); + /* + * At the time of this writing, The M88 part is + * the only supported SGMII PHY product. + */ + if (phy_id == M88_VENDOR) + break; + } else { + hw_dbg(hw, "PHY address %u was unreadable\n", + phy->addr); + } + } + + /* A valid PHY type couldn't be found. */ + if (phy->addr == 8) { + phy->addr = 0; + ret_val = -E1000_ERR_PHY; + goto out; + } + + ret_val = igb_get_phy_id(hw); + +out: + return ret_val; +} + +/** + * e1000_phy_hw_reset_sgmii_82575 - Performs a PHY reset + * @hw: pointer to the HW structure + * + * Resets the PHY using the serial gigabit media independent interface. + **/ +static s32 igb_phy_hw_reset_sgmii_82575(struct e1000_hw *hw) +{ + s32 ret_val; + + /* + * This isn't a true "hard" reset, but is the only reset + * available to us at this time. + */ + + hw_dbg(hw, "Soft resetting SGMII attached PHY...\n"); + + /* + * SFP documentation requires the following to configure the SPF module + * to work on SGMII. No further documentation is given. + */ + ret_val = hw->phy.ops.write_phy_reg(hw, 0x1B, 0x8084); + if (ret_val) + goto out; + + ret_val = igb_phy_sw_reset(hw); + +out: + return ret_val; +} + +/** + * e1000_set_d0_lplu_state_82575 - Set Low Power Linkup D0 state + * @hw: pointer to the HW structure + * @active: true to enable LPLU, false to disable + * + * Sets the LPLU D0 state according to the active flag. When + * activating LPLU this function also disables smart speed + * and vice versa. LPLU will not be activated unless the + * device autonegotiation advertisement meets standards of + * either 10 or 10/100 or 10/100/1000 at all duplexes. + * This is a function pointer entry point only called by + * PHY setup routines. + **/ +static s32 igb_set_d0_lplu_state_82575(struct e1000_hw *hw, bool active) +{ + struct e1000_phy_info *phy = &hw->phy; + s32 ret_val; + u16 data; + + ret_val = hw->phy.ops.read_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT, + &data); + if (ret_val) + goto out; + + if (active) { + data |= IGP02E1000_PM_D0_LPLU; + ret_val = hw->phy.ops.write_phy_reg(hw, + IGP02E1000_PHY_POWER_MGMT, + data); + if (ret_val) + goto out; + + /* When LPLU is enabled, we should disable SmartSpeed */ + ret_val = hw->phy.ops.read_phy_reg(hw, + IGP01E1000_PHY_PORT_CONFIG, + &data); + data &= ~IGP01E1000_PSCFR_SMART_SPEED; + ret_val = hw->phy.ops.write_phy_reg(hw, + IGP01E1000_PHY_PORT_CONFIG, + data); + if (ret_val) + goto out; + } else { + data &= ~IGP02E1000_PM_D0_LPLU; + ret_val = hw->phy.ops.write_phy_reg(hw, + IGP02E1000_PHY_POWER_MGMT, + data); + /* + * LPLU and SmartSpeed are mutually exclusive. LPLU is used + * during Dx states where the power conservation is most + * important. During driver activity we should enable + * SmartSpeed, so performance is maintained. + */ + if (phy->smart_speed == e1000_smart_speed_on) { + ret_val = hw->phy.ops.read_phy_reg(hw, + IGP01E1000_PHY_PORT_CONFIG, + &data); + if (ret_val) + goto out; + + data |= IGP01E1000_PSCFR_SMART_SPEED; + ret_val = hw->phy.ops.write_phy_reg(hw, + IGP01E1000_PHY_PORT_CONFIG, + data); + if (ret_val) + goto out; + } else if (phy->smart_speed == e1000_smart_speed_off) { + ret_val = hw->phy.ops.read_phy_reg(hw, + IGP01E1000_PHY_PORT_CONFIG, + &data); + if (ret_val) + goto out; + + data &= ~IGP01E1000_PSCFR_SMART_SPEED; + ret_val = hw->phy.ops.write_phy_reg(hw, + IGP01E1000_PHY_PORT_CONFIG, + data); + if (ret_val) + goto out; + } + } + +out: + return ret_val; +} + +/** + * e1000_acquire_nvm_82575 - Request for access to EEPROM + * @hw: pointer to the HW structure + * + * Acquire the necessary semaphores for exclussive access to the EEPROM. + * Set the EEPROM access request bit and wait for EEPROM access grant bit. + * Return successful if access grant bit set, else clear the request for + * EEPROM access and return -E1000_ERR_NVM (-1). + **/ +static s32 igb_acquire_nvm_82575(struct e1000_hw *hw) +{ + s32 ret_val; + + ret_val = igb_acquire_swfw_sync_82575(hw, E1000_SWFW_EEP_SM); + if (ret_val) + goto out; + + ret_val = igb_acquire_nvm(hw); + + if (ret_val) + igb_release_swfw_sync_82575(hw, E1000_SWFW_EEP_SM); + +out: + return ret_val; +} + +/** + * e1000_release_nvm_82575 - Release exclusive access to EEPROM + * @hw: pointer to the HW structure + * + * Stop any current commands to the EEPROM and clear the EEPROM request bit, + * then release the semaphores acquired. + **/ +static void igb_release_nvm_82575(struct e1000_hw *hw) +{ + igb_release_nvm(hw); + igb_release_swfw_sync_82575(hw, E1000_SWFW_EEP_SM); +} + +/** + * e1000_acquire_swfw_sync_82575 - Acquire SW/FW semaphore + * @hw: pointer to the HW structure + * @mask: specifies which semaphore to acquire + * + * Acquire the SW/FW semaphore to access the PHY or NVM. The mask + * will also specify which port we're acquiring the lock for. + **/ +static s32 igb_acquire_swfw_sync_82575(struct e1000_hw *hw, u16 mask) +{ + u32 swfw_sync; + u32 swmask = mask; + u32 fwmask = mask << 16; + s32 ret_val = 0; + s32 i = 0, timeout = 200; /* FIXME: find real value to use here */ + + while (i < timeout) { + if (igb_get_hw_semaphore(hw)) { + ret_val = -E1000_ERR_SWFW_SYNC; + goto out; + } + + swfw_sync = rd32(E1000_SW_FW_SYNC); + if (!(swfw_sync & (fwmask | swmask))) + break; + + /* + * Firmware currently using resource (fwmask) + * or other software thread using resource (swmask) + */ + igb_put_hw_semaphore(hw); + mdelay(5); + i++; + } + + if (i == timeout) { + hw_dbg(hw, "Can't access resource, SW_FW_SYNC timeout.\n"); + ret_val = -E1000_ERR_SWFW_SYNC; + goto out; + } + + swfw_sync |= swmask; + wr32(E1000_SW_FW_SYNC, swfw_sync); + + igb_put_hw_semaphore(hw); + +out: + return ret_val; +} + +/** + * e1000_release_swfw_sync_82575 - Release SW/FW semaphore + * @hw: pointer to the HW structure + * @mask: specifies which semaphore to acquire + * + * Release the SW/FW semaphore used to access the PHY or NVM. The mask + * will also specify which port we're releasing the lock for. + **/ +static void igb_release_swfw_sync_82575(struct e1000_hw *hw, u16 mask) +{ + u32 swfw_sync; + + while (igb_get_hw_semaphore(hw) != 0); + /* Empty */ + + swfw_sync = rd32(E1000_SW_FW_SYNC); + swfw_sync &= ~mask; + wr32(E1000_SW_FW_SYNC, swfw_sync); + + igb_put_hw_semaphore(hw); +} + +/** + * e1000_get_cfg_done_82575 - Read config done bit + * @hw: pointer to the HW structure + * + * Read the management control register for the config done bit for + * completion status. NOTE: silicon which is EEPROM-less will fail trying + * to read the config done bit, so an error is *ONLY* logged and returns + * 0. If we were to return with error, EEPROM-less silicon + * would not be able to be reset or change link. + **/ +static s32 igb_get_cfg_done_82575(struct e1000_hw *hw) +{ + s32 timeout = PHY_CFG_TIMEOUT; + s32 ret_val = 0; + u32 mask = E1000_NVM_CFG_DONE_PORT_0; + + if (hw->bus.func == 1) + mask = E1000_NVM_CFG_DONE_PORT_1; + + while (timeout) { + if (rd32(E1000_EEMNGCTL) & mask) + break; + msleep(1); + timeout--; + } + if (!timeout) + hw_dbg(hw, "MNG configuration cycle has not completed.\n"); + + /* If EEPROM is not marked present, init the PHY manually */ + if (((rd32(E1000_EECD) & E1000_EECD_PRES) == 0) && + (hw->phy.type == e1000_phy_igp_3)) + igb_phy_init_script_igp3(hw); + + return ret_val; +} + +/** + * e1000_check_for_link_82575 - Check for link + * @hw: pointer to the HW structure + * + * If sgmii is enabled, then use the pcs register to determine link, otherwise + * use the generic interface for determining link. + **/ +static s32 igb_check_for_link_82575(struct e1000_hw *hw) +{ + s32 ret_val; + u16 speed, duplex; + + /* SGMII link check is done through the PCS register. */ + if ((hw->phy.media_type != e1000_media_type_copper) || + (igb_sgmii_active_82575(hw))) + ret_val = igb_get_pcs_speed_and_duplex_82575(hw, &speed, + &duplex); + else + ret_val = igb_check_for_copper_link(hw); + + return ret_val; +} + +/** + * e1000_get_pcs_speed_and_duplex_82575 - Retrieve current speed/duplex + * @hw: pointer to the HW structure + * @speed: stores the current speed + * @duplex: stores the current duplex + * + * Using the physical coding sub-layer (PCS), retreive the current speed and + * duplex, then store the values in the pointers provided. + **/ +static s32 igb_get_pcs_speed_and_duplex_82575(struct e1000_hw *hw, u16 *speed, + u16 *duplex) +{ + struct e1000_mac_info *mac = &hw->mac; + u32 pcs; + + /* Set up defaults for the return values of this function */ + mac->serdes_has_link = false; + *speed = 0; + *duplex = 0; + + /* + * Read the PCS Status register for link state. For non-copper mode, + * the status register is not accurate. The PCS status register is + * used instead. + */ + pcs = rd32(E1000_PCS_LSTAT); + + /* + * The link up bit determines when link is up on autoneg. The sync ok + * gets set once both sides sync up and agree upon link. Stable link + * can be determined by checking for both link up and link sync ok + */ + if ((pcs & E1000_PCS_LSTS_LINK_OK) && (pcs & E1000_PCS_LSTS_SYNK_OK)) { + mac->serdes_has_link = true; + + /* Detect and store PCS speed */ + if (pcs & E1000_PCS_LSTS_SPEED_1000) { + *speed = SPEED_1000; + } else if (pcs & E1000_PCS_LSTS_SPEED_100) { + *speed = SPEED_100; + } else { + *speed = SPEED_10; + } + + /* Detect and store PCS duplex */ + if (pcs & E1000_PCS_LSTS_DUPLEX_FULL) { + *duplex = FULL_DUPLEX; + } else { + *duplex = HALF_DUPLEX; + } + } + + return 0; +} + +/** + * e1000_rar_set_82575 - Set receive address register + * @hw: pointer to the HW structure + * @addr: pointer to the receive address + * @index: receive address array register + * + * Sets the receive address array register at index to the address passed + * in by addr. + **/ +static void igb_rar_set_82575(struct e1000_hw *hw, u8 *addr, u32 index) +{ + if (index < E1000_RAR_ENTRIES_82575) + igb_rar_set(hw, addr, index); + + return; +} + +/** + * e1000_reset_hw_82575 - Reset hardware + * @hw: pointer to the HW structure + * + * This resets the hardware into a known state. This is a + * function pointer entry point called by the api module. + **/ +static s32 igb_reset_hw_82575(struct e1000_hw *hw) +{ + u32 ctrl, icr; + s32 ret_val; + + /* + * Prevent the PCI-E bus from sticking if there is no TLP connection + * on the last TLP read/write transaction when MAC is reset. + */ + ret_val = igb_disable_pcie_master(hw); + if (ret_val) + hw_dbg(hw, "PCI-E Master disable polling has failed.\n"); + + hw_dbg(hw, "Masking off all interrupts\n"); + wr32(E1000_IMC, 0xffffffff); + + wr32(E1000_RCTL, 0); + wr32(E1000_TCTL, E1000_TCTL_PSP); + wrfl(); + + msleep(10); + + ctrl = rd32(E1000_CTRL); + + hw_dbg(hw, "Issuing a global reset to MAC\n"); + wr32(E1000_CTRL, ctrl | E1000_CTRL_RST); + + ret_val = igb_get_auto_rd_done(hw); + if (ret_val) { + /* + * When auto config read does not complete, do not + * return with an error. This can happen in situations + * where there is no eeprom and prevents getting link. + */ + hw_dbg(hw, "Auto Read Done did not complete\n"); + } + + /* If EEPROM is not present, run manual init scripts */ + if ((rd32(E1000_EECD) & E1000_EECD_PRES) == 0) + igb_reset_init_script_82575(hw); + + /* Clear any pending interrupt events. */ + wr32(E1000_IMC, 0xffffffff); + icr = rd32(E1000_ICR); + + igb_check_alt_mac_addr(hw); + + return ret_val; +} + +/** + * e1000_init_hw_82575 - Initialize hardware + * @hw: pointer to the HW structure + * + * This inits the hardware readying it for operation. + **/ +static s32 igb_init_hw_82575(struct e1000_hw *hw) +{ + struct e1000_mac_info *mac = &hw->mac; + s32 ret_val; + u16 i, rar_count = mac->rar_entry_count; + + /* Initialize identification LED */ + ret_val = igb_id_led_init(hw); + if (ret_val) { + hw_dbg(hw, "Error initializing identification LED\n"); + /* This is not fatal and we should not stop init due to this */ + } + + /* Disabling VLAN filtering */ + hw_dbg(hw, "Initializing the IEEE VLAN\n"); + igb_clear_vfta(hw); + + /* Setup the receive address */ + igb_init_rx_addrs(hw, rar_count); + /* Zero out the Multicast HASH table */ + hw_dbg(hw, "Zeroing the MTA\n"); + for (i = 0; i < mac->mta_reg_count; i++) + array_wr32(E1000_MTA, i, 0); + + /* Setup link and flow control */ + ret_val = igb_setup_link(hw); + + /* + * Clear all of the statistics registers (clear on read). It is + * important that we do this after we have tried to establish link + * because the symbol error count will increment wildly if there + * is no link. + */ + igb_clear_hw_cntrs_82575(hw); + + return ret_val; +} + +/** + * e1000_setup_copper_link_82575 - Configure copper link settings + * @hw: pointer to the HW structure + * + * Configures the link for auto-neg or forced speed and duplex. Then we check + * for link, once link is established calls to configure collision distance + * and flow control are called. + **/ +static s32 igb_setup_copper_link_82575(struct e1000_hw *hw) +{ + u32 ctrl, led_ctrl; + s32 ret_val; + bool link; + + ctrl = rd32(E1000_CTRL); + ctrl |= E1000_CTRL_SLU; + ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX); + wr32(E1000_CTRL, ctrl); + + switch (hw->phy.type) { + case e1000_phy_m88: + ret_val = igb_copper_link_setup_m88(hw); + break; + case e1000_phy_igp_3: + ret_val = igb_copper_link_setup_igp(hw); + /* Setup activity LED */ + led_ctrl = rd32(E1000_LEDCTL); + led_ctrl &= IGP_ACTIVITY_LED_MASK; + led_ctrl |= (IGP_ACTIVITY_LED_ENABLE | IGP_LED3_MODE); + wr32(E1000_LEDCTL, led_ctrl); + break; + default: + ret_val = -E1000_ERR_PHY; + break; + } + + if (ret_val) + goto out; + + if (hw->mac.autoneg) { + /* + * Setup autoneg and flow control advertisement + * and perform autonegotiation. + */ + ret_val = igb_copper_link_autoneg(hw); + if (ret_val) + goto out; + } else { + /* + * PHY will be set to 10H, 10F, 100H or 100F + * depending on user settings. + */ + hw_dbg(hw, "Forcing Speed and Duplex\n"); + ret_val = igb_phy_force_speed_duplex(hw); + if (ret_val) { + hw_dbg(hw, "Error Forcing Speed and Duplex\n"); + goto out; + } + } + + ret_val = igb_configure_pcs_link_82575(hw); + if (ret_val) + goto out; + + /* + * Check link status. Wait up to 100 microseconds for link to become + * valid. + */ + ret_val = igb_phy_has_link(hw, + COPPER_LINK_UP_LIMIT, + 10, + &link); + if (ret_val) + goto out; + + if (link) { + hw_dbg(hw, "Valid link established!!!\n"); + /* Config the MAC and PHY after link is up */ + igb_config_collision_dist(hw); + ret_val = igb_config_fc_after_link_up(hw); + } else { + hw_dbg(hw, "Unable to establish link!!!\n"); + } + +out: + return ret_val; +} + +/** + * e1000_setup_fiber_serdes_link_82575 - Setup link for fiber/serdes + * @hw: pointer to the HW structure + * + * Configures speed and duplex for fiber and serdes links. + **/ +static s32 igb_setup_fiber_serdes_link_82575(struct e1000_hw *hw) +{ + u32 reg; + + /* + * On the 82575, SerDes loopback mode persists until it is + * explicitly turned off or a power cycle is performed. A read to + * the register does not indicate its status. Therefore, we ensure + * loopback mode is disabled during initialization. + */ + wr32(E1000_SCTL, E1000_SCTL_DISABLE_SERDES_LOOPBACK); + + /* Force link up, set 1gb, set both sw defined pins */ + reg = rd32(E1000_CTRL); + reg |= E1000_CTRL_SLU | + E1000_CTRL_SPD_1000 | + E1000_CTRL_FRCSPD | + E1000_CTRL_SWDPIN0 | + E1000_CTRL_SWDPIN1; + wr32(E1000_CTRL, reg); + + /* Set switch control to serdes energy detect */ + reg = rd32(E1000_CONNSW); + reg |= E1000_CONNSW_ENRGSRC; + wr32(E1000_CONNSW, reg); + + /* + * New SerDes mode allows for forcing speed or autonegotiating speed + * at 1gb. Autoneg should be default set by most drivers. This is the + * mode that will be compatible with older link partners and switches. + * However, both are supported by the hardware and some drivers/tools. + */ + reg = rd32(E1000_PCS_LCTL); + + reg &= ~(E1000_PCS_LCTL_AN_ENABLE | E1000_PCS_LCTL_FLV_LINK_UP | + E1000_PCS_LCTL_FSD | E1000_PCS_LCTL_FORCE_LINK); + + if (hw->mac.autoneg) { + /* Set PCS register for autoneg */ + reg |= E1000_PCS_LCTL_FSV_1000 | /* Force 1000 */ + E1000_PCS_LCTL_FDV_FULL | /* SerDes Full duplex */ + E1000_PCS_LCTL_AN_ENABLE | /* Enable Autoneg */ + E1000_PCS_LCTL_AN_RESTART; /* Restart autoneg */ + hw_dbg(hw, "Configuring Autoneg; PCS_LCTL = 0x%08X\n", reg); + } else { + /* Set PCS register for forced speed */ + reg |= E1000_PCS_LCTL_FLV_LINK_UP | /* Force link up */ + E1000_PCS_LCTL_FSV_1000 | /* Force 1000 */ + E1000_PCS_LCTL_FDV_FULL | /* SerDes Full duplex */ + E1000_PCS_LCTL_FSD | /* Force Speed */ + E1000_PCS_LCTL_FORCE_LINK; /* Force Link */ + hw_dbg(hw, "Configuring Forced Link; PCS_LCTL = 0x%08X\n", reg); + } + wr32(E1000_PCS_LCTL, reg); + + return 0; +} + +/** + * e1000_configure_pcs_link_82575 - Configure PCS link + * @hw: pointer to the HW structure + * + * Configure the physical coding sub-layer (PCS) link. The PCS link is + * only used on copper connections where the serialized gigabit media + * independent interface (sgmii) is being used. Configures the link + * for auto-negotiation or forces speed/duplex. + **/ +static s32 igb_configure_pcs_link_82575(struct e1000_hw *hw) +{ + struct e1000_mac_info *mac = &hw->mac; + u32 reg = 0; + + if (hw->phy.media_type != e1000_media_type_copper || + !(igb_sgmii_active_82575(hw))) + goto out; + + /* For SGMII, we need to issue a PCS autoneg restart */ + reg = rd32(E1000_PCS_LCTL); + + /* AN time out should be disabled for SGMII mode */ + reg &= ~(E1000_PCS_LCTL_AN_TIMEOUT); + + if (mac->autoneg) { + /* Make sure forced speed and force link are not set */ + reg &= ~(E1000_PCS_LCTL_FSD | E1000_PCS_LCTL_FORCE_LINK); + + /* + * The PHY should be setup prior to calling this function. + * All we need to do is restart autoneg and enable autoneg. + */ + reg |= E1000_PCS_LCTL_AN_RESTART | E1000_PCS_LCTL_AN_ENABLE; + } else { + /* Set PCS regiseter for forced speed */ + + /* Turn off bits for full duplex, speed, and autoneg */ + reg &= ~(E1000_PCS_LCTL_FSV_1000 | + E1000_PCS_LCTL_FSV_100 | + E1000_PCS_LCTL_FDV_FULL | + E1000_PCS_LCTL_AN_ENABLE); + + /* Check for duplex first */ + if (mac->forced_speed_duplex & E1000_ALL_FULL_DUPLEX) + reg |= E1000_PCS_LCTL_FDV_FULL; + + /* Now set speed */ + if (mac->forced_speed_duplex & E1000_ALL_100_SPEED) + reg |= E1000_PCS_LCTL_FSV_100; + + /* Force speed and force link */ + reg |= E1000_PCS_LCTL_FSD | + E1000_PCS_LCTL_FORCE_LINK | + E1000_PCS_LCTL_FLV_LINK_UP; + + hw_dbg(hw, + "Wrote 0x%08X to PCS_LCTL to configure forced link\n", + reg); + } + wr32(E1000_PCS_LCTL, reg); + +out: + return 0; +} + +/** + * e1000_sgmii_active_82575 - Return sgmii state + * @hw: pointer to the HW structure + * + * 82575 silicon has a serialized gigabit media independent interface (sgmii) + * which can be enabled for use in the embedded applications. Simply + * return the current state of the sgmii interface. + **/ +static bool igb_sgmii_active_82575(struct e1000_hw *hw) +{ + struct e1000_dev_spec_82575 *dev_spec; + bool ret_val; + + if (hw->mac.type != e1000_82575) { + ret_val = false; + goto out; + } + + dev_spec = (struct e1000_dev_spec_82575 *)hw->dev_spec; + + ret_val = dev_spec->sgmii_active; + +out: + return ret_val; +} + +/** + * e1000_reset_init_script_82575 - Inits HW defaults after reset + * @hw: pointer to the HW structure + * + * Inits recommended HW defaults after a reset when there is no EEPROM + * detected. This is only for the 82575. + **/ +static s32 igb_reset_init_script_82575(struct e1000_hw *hw) +{ + if (hw->mac.type == e1000_82575) { + hw_dbg(hw, "Running reset init script for 82575\n"); + /* SerDes configuration via SERDESCTRL */ + igb_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x00, 0x0C); + igb_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x01, 0x78); + igb_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x1B, 0x23); + igb_write_8bit_ctrl_reg(hw, E1000_SCTL, 0x23, 0x15); + + /* CCM configuration via CCMCTL register */ + igb_write_8bit_ctrl_reg(hw, E1000_CCMCTL, 0x14, 0x00); + igb_write_8bit_ctrl_reg(hw, E1000_CCMCTL, 0x10, 0x00); + + /* PCIe lanes configuration */ + igb_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x00, 0xEC); + igb_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x61, 0xDF); + igb_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x34, 0x05); + igb_write_8bit_ctrl_reg(hw, E1000_GIOCTL, 0x2F, 0x81); + + /* PCIe PLL Configuration */ + igb_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x02, 0x47); + igb_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x14, 0x00); + igb_write_8bit_ctrl_reg(hw, E1000_SCCTL, 0x10, 0x00); + } + + return 0; +} + +/** + * e1000_read_mac_addr_82575 - Read device MAC address + * @hw: pointer to the HW structure + **/ +static s32 igb_read_mac_addr_82575(struct e1000_hw *hw) +{ + s32 ret_val = 0; + + if (igb_check_alt_mac_addr(hw)) + ret_val = igb_read_mac_addr(hw); + + return ret_val; +} + +/** + * e1000_clear_hw_cntrs_82575 - Clear device specific hardware counters + * @hw: pointer to the HW structure + * + * Clears the hardware counters by reading the counter registers. + **/ +static void igb_clear_hw_cntrs_82575(struct e1000_hw *hw) +{ + u32 temp; + + igb_clear_hw_cntrs_base(hw); + + temp = rd32(E1000_PRC64); + temp = rd32(E1000_PRC127); + temp = rd32(E1000_PRC255); + temp = rd32(E1000_PRC511); + temp = rd32(E1000_PRC1023); + temp = rd32(E1000_PRC1522); + temp = rd32(E1000_PTC64); + temp = rd32(E1000_PTC127); + temp = rd32(E1000_PTC255); + temp = rd32(E1000_PTC511); + temp = rd32(E1000_PTC1023); + temp = rd32(E1000_PTC1522); + + temp = rd32(E1000_ALGNERRC); + temp = rd32(E1000_RXERRC); + temp = rd32(E1000_TNCRS); + temp = rd32(E1000_CEXTERR); + temp = rd32(E1000_TSCTC); + temp = rd32(E1000_TSCTFC); + + temp = rd32(E1000_MGTPRC); + temp = rd32(E1000_MGTPDC); + temp = rd32(E1000_MGTPTC); + + temp = rd32(E1000_IAC); + temp = rd32(E1000_ICRXOC); + + temp = rd32(E1000_ICRXPTC); + temp = rd32(E1000_ICRXATC); + temp = rd32(E1000_ICTXPTC); + temp = rd32(E1000_ICTXATC); + temp = rd32(E1000_ICTXQEC); + temp = rd32(E1000_ICTXQMTC); + temp = rd32(E1000_ICRXDMTC); + + temp = rd32(E1000_CBTMPC); + temp = rd32(E1000_HTDPMC); + temp = rd32(E1000_CBRMPC); + temp = rd32(E1000_RPTHC); + temp = rd32(E1000_HGPTC); + temp = rd32(E1000_HTCBDPC); + temp = rd32(E1000_HGORCL); + temp = rd32(E1000_HGORCH); + temp = rd32(E1000_HGOTCL); + temp = rd32(E1000_HGOTCH); + temp = rd32(E1000_LENERRS); + + /* This register should not be read in copper configurations */ + if (hw->phy.media_type == e1000_media_type_internal_serdes) + temp = rd32(E1000_SCVPC); +} + +static struct e1000_mac_operations e1000_mac_ops_82575 = { + .reset_hw = igb_reset_hw_82575, + .init_hw = igb_init_hw_82575, + .check_for_link = igb_check_for_link_82575, + .rar_set = igb_rar_set_82575, + .read_mac_addr = igb_read_mac_addr_82575, + .get_speed_and_duplex = igb_get_speed_and_duplex_copper, +}; + +static struct e1000_phy_operations e1000_phy_ops_82575 = { + .acquire_phy = igb_acquire_phy_82575, + .get_cfg_done = igb_get_cfg_done_82575, + .release_phy = igb_release_phy_82575, +}; + +static struct e1000_nvm_operations e1000_nvm_ops_82575 = { + .acquire_nvm = igb_acquire_nvm_82575, + .read_nvm = igb_read_nvm_eerd, + .release_nvm = igb_release_nvm_82575, + .write_nvm = igb_write_nvm_spi, +}; + +const struct e1000_info e1000_82575_info = { + .get_invariants = igb_get_invariants_82575, + .mac_ops = &e1000_mac_ops_82575, + .phy_ops = &e1000_phy_ops_82575, + .nvm_ops = &e1000_nvm_ops_82575, +}; + |