| Current Path : /sys/dev/e1000/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/e1000/e1000_82575.c |
/******************************************************************************
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/*$FreeBSD: release/9.1.0/sys/dev/e1000/e1000_82575.c 238262 2012-07-08 20:35:56Z jfv $*/
/*
* 82575EB Gigabit Network Connection
* 82575EB Gigabit Backplane Connection
* 82575GB Gigabit Network Connection
* 82576 Gigabit Network Connection
* 82576 Quad Port Gigabit Mezzanine Adapter
* 82580 Gigabit Network Connection
* I350 Gigabit Network Connection
*/
#include "e1000_api.h"
#include "e1000_i210.h"
static s32 e1000_init_phy_params_82575(struct e1000_hw *hw);
static s32 e1000_init_mac_params_82575(struct e1000_hw *hw);
static s32 e1000_acquire_phy_82575(struct e1000_hw *hw);
static void e1000_release_phy_82575(struct e1000_hw *hw);
static s32 e1000_acquire_nvm_82575(struct e1000_hw *hw);
static void e1000_release_nvm_82575(struct e1000_hw *hw);
static s32 e1000_check_for_link_82575(struct e1000_hw *hw);
static s32 e1000_get_cfg_done_82575(struct e1000_hw *hw);
static s32 e1000_get_link_up_info_82575(struct e1000_hw *hw, u16 *speed,
u16 *duplex);
static s32 e1000_init_hw_82575(struct e1000_hw *hw);
static s32 e1000_phy_hw_reset_sgmii_82575(struct e1000_hw *hw);
static s32 e1000_read_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset,
u16 *data);
static s32 e1000_reset_hw_82575(struct e1000_hw *hw);
static s32 e1000_reset_hw_82580(struct e1000_hw *hw);
static s32 e1000_read_phy_reg_82580(struct e1000_hw *hw,
u32 offset, u16 *data);
static s32 e1000_write_phy_reg_82580(struct e1000_hw *hw,
u32 offset, u16 data);
static s32 e1000_set_d0_lplu_state_82580(struct e1000_hw *hw,
bool active);
static s32 e1000_set_d3_lplu_state_82580(struct e1000_hw *hw,
bool active);
static s32 e1000_set_d0_lplu_state_82575(struct e1000_hw *hw,
bool active);
static s32 e1000_setup_copper_link_82575(struct e1000_hw *hw);
static s32 e1000_setup_serdes_link_82575(struct e1000_hw *hw);
static s32 e1000_get_media_type_82575(struct e1000_hw *hw);
static s32 e1000_set_sfp_media_type_82575(struct e1000_hw *hw);
static s32 e1000_valid_led_default_82575(struct e1000_hw *hw, u16 *data);
static s32 e1000_write_phy_reg_sgmii_82575(struct e1000_hw *hw,
u32 offset, u16 data);
static void e1000_clear_hw_cntrs_82575(struct e1000_hw *hw);
static s32 e1000_acquire_swfw_sync_82575(struct e1000_hw *hw, u16 mask);
static s32 e1000_get_pcs_speed_and_duplex_82575(struct e1000_hw *hw,
u16 *speed, u16 *duplex);
static s32 e1000_get_phy_id_82575(struct e1000_hw *hw);
static void e1000_release_swfw_sync_82575(struct e1000_hw *hw, u16 mask);
static bool e1000_sgmii_active_82575(struct e1000_hw *hw);
static s32 e1000_reset_init_script_82575(struct e1000_hw *hw);
static s32 e1000_read_mac_addr_82575(struct e1000_hw *hw);
static void e1000_config_collision_dist_82575(struct e1000_hw *hw);
static void e1000_power_down_phy_copper_82575(struct e1000_hw *hw);
static void e1000_shutdown_serdes_link_82575(struct e1000_hw *hw);
static void e1000_power_up_serdes_link_82575(struct e1000_hw *hw);
static s32 e1000_set_pcie_completion_timeout(struct e1000_hw *hw);
static s32 e1000_reset_mdicnfg_82580(struct e1000_hw *hw);
static s32 e1000_validate_nvm_checksum_82580(struct e1000_hw *hw);
static s32 e1000_update_nvm_checksum_82580(struct e1000_hw *hw);
static s32 e1000_update_nvm_checksum_with_offset(struct e1000_hw *hw,
u16 offset);
static s32 e1000_validate_nvm_checksum_with_offset(struct e1000_hw *hw,
u16 offset);
static s32 e1000_validate_nvm_checksum_i350(struct e1000_hw *hw);
static s32 e1000_update_nvm_checksum_i350(struct e1000_hw *hw);
static void e1000_write_vfta_i350(struct e1000_hw *hw, u32 offset, u32 value);
static void e1000_clear_vfta_i350(struct e1000_hw *hw);
static void e1000_i2c_start(struct e1000_hw *hw);
static void e1000_i2c_stop(struct e1000_hw *hw);
static s32 e1000_clock_in_i2c_byte(struct e1000_hw *hw, u8 *data);
static s32 e1000_clock_out_i2c_byte(struct e1000_hw *hw, u8 data);
static s32 e1000_get_i2c_ack(struct e1000_hw *hw);
static s32 e1000_clock_in_i2c_bit(struct e1000_hw *hw, bool *data);
static s32 e1000_clock_out_i2c_bit(struct e1000_hw *hw, bool data);
static void e1000_raise_i2c_clk(struct e1000_hw *hw, u32 *i2cctl);
static void e1000_lower_i2c_clk(struct e1000_hw *hw, u32 *i2cctl);
static s32 e1000_set_i2c_data(struct e1000_hw *hw, u32 *i2cctl, bool data);
static bool e1000_get_i2c_data(u32 *i2cctl);
static const u16 e1000_82580_rxpbs_table[] = {
36, 72, 144, 1, 2, 4, 8, 16, 35, 70, 140 };
#define E1000_82580_RXPBS_TABLE_SIZE \
(sizeof(e1000_82580_rxpbs_table)/sizeof(u16))
/**
* e1000_sgmii_uses_mdio_82575 - Determine if I2C pins are for external MDIO
* @hw: pointer to the HW structure
*
* Called to determine if the I2C pins are being used for I2C or as an
* external MDIO interface since the two options are mutually exclusive.
**/
static bool e1000_sgmii_uses_mdio_82575(struct e1000_hw *hw)
{
u32 reg = 0;
bool ext_mdio = FALSE;
DEBUGFUNC("e1000_sgmii_uses_mdio_82575");
switch (hw->mac.type) {
case e1000_82575:
case e1000_82576:
reg = E1000_READ_REG(hw, E1000_MDIC);
ext_mdio = !!(reg & E1000_MDIC_DEST);
break;
case e1000_82580:
case e1000_i350:
reg = E1000_READ_REG(hw, E1000_MDICNFG);
ext_mdio = !!(reg & E1000_MDICNFG_EXT_MDIO);
break;
default:
break;
}
return ext_mdio;
}
/**
* e1000_init_phy_params_82575 - Init PHY func ptrs.
* @hw: pointer to the HW structure
**/
static s32 e1000_init_phy_params_82575(struct e1000_hw *hw)
{
struct e1000_phy_info *phy = &hw->phy;
s32 ret_val = E1000_SUCCESS;
u32 ctrl_ext;
DEBUGFUNC("e1000_init_phy_params_82575");
phy->ops.read_i2c_byte = e1000_read_i2c_byte_generic;
phy->ops.write_i2c_byte = e1000_write_i2c_byte_generic;
if (hw->phy.media_type != e1000_media_type_copper) {
phy->type = e1000_phy_none;
goto out;
}
phy->ops.power_up = e1000_power_up_phy_copper;
phy->ops.power_down = e1000_power_down_phy_copper_82575;
phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT;
phy->reset_delay_us = 100;
phy->ops.acquire = e1000_acquire_phy_82575;
phy->ops.check_reset_block = e1000_check_reset_block_generic;
phy->ops.commit = e1000_phy_sw_reset_generic;
phy->ops.get_cfg_done = e1000_get_cfg_done_82575;
phy->ops.release = e1000_release_phy_82575;
ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
if (e1000_sgmii_active_82575(hw)) {
phy->ops.reset = e1000_phy_hw_reset_sgmii_82575;
ctrl_ext |= E1000_CTRL_I2C_ENA;
} else {
phy->ops.reset = e1000_phy_hw_reset_generic;
ctrl_ext &= ~E1000_CTRL_I2C_ENA;
}
E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);
e1000_reset_mdicnfg_82580(hw);
if (e1000_sgmii_active_82575(hw) && !e1000_sgmii_uses_mdio_82575(hw)) {
phy->ops.read_reg = e1000_read_phy_reg_sgmii_82575;
phy->ops.write_reg = e1000_write_phy_reg_sgmii_82575;
} else {
switch (hw->mac.type) {
case e1000_82580:
case e1000_i350:
phy->ops.read_reg = e1000_read_phy_reg_82580;
phy->ops.write_reg = e1000_write_phy_reg_82580;
break;
case e1000_i210:
case e1000_i211:
phy->ops.read_reg = e1000_read_phy_reg_gs40g;
phy->ops.write_reg = e1000_write_phy_reg_gs40g;
break;
default:
phy->ops.read_reg = e1000_read_phy_reg_igp;
phy->ops.write_reg = e1000_write_phy_reg_igp;
}
}
/* Set phy->phy_addr and phy->id. */
ret_val = e1000_get_phy_id_82575(hw);
/* Verify phy id and set remaining function pointers */
switch (phy->id) {
case I347AT4_E_PHY_ID:
case M88E1112_E_PHY_ID:
case M88E1340M_E_PHY_ID:
case M88E1111_I_PHY_ID:
phy->type = e1000_phy_m88;
phy->ops.check_polarity = e1000_check_polarity_m88;
phy->ops.get_info = e1000_get_phy_info_m88;
if (phy->id == I347AT4_E_PHY_ID ||
phy->id == M88E1112_E_PHY_ID ||
phy->id == M88E1340M_E_PHY_ID)
phy->ops.get_cable_length =
e1000_get_cable_length_m88_gen2;
else
phy->ops.get_cable_length = e1000_get_cable_length_m88;
phy->ops.force_speed_duplex = e1000_phy_force_speed_duplex_m88;
break;
case IGP03E1000_E_PHY_ID:
case IGP04E1000_E_PHY_ID:
phy->type = e1000_phy_igp_3;
phy->ops.check_polarity = e1000_check_polarity_igp;
phy->ops.get_info = e1000_get_phy_info_igp;
phy->ops.get_cable_length = e1000_get_cable_length_igp_2;
phy->ops.force_speed_duplex = e1000_phy_force_speed_duplex_igp;
phy->ops.set_d0_lplu_state = e1000_set_d0_lplu_state_82575;
phy->ops.set_d3_lplu_state = e1000_set_d3_lplu_state_generic;
break;
case I82580_I_PHY_ID:
case I350_I_PHY_ID:
phy->type = e1000_phy_82580;
phy->ops.check_polarity = e1000_check_polarity_82577;
phy->ops.force_speed_duplex =
e1000_phy_force_speed_duplex_82577;
phy->ops.get_cable_length = e1000_get_cable_length_82577;
phy->ops.get_info = e1000_get_phy_info_82577;
phy->ops.set_d0_lplu_state = e1000_set_d0_lplu_state_82580;
phy->ops.set_d3_lplu_state = e1000_set_d3_lplu_state_82580;
break;
case I210_I_PHY_ID:
phy->type = e1000_phy_i210;
phy->ops.check_polarity = e1000_check_polarity_m88;
phy->ops.get_info = e1000_get_phy_info_m88;
phy->ops.get_cable_length = e1000_get_cable_length_m88_gen2;
phy->ops.set_d0_lplu_state = e1000_set_d0_lplu_state_82580;
phy->ops.set_d3_lplu_state = e1000_set_d3_lplu_state_82580;
phy->ops.force_speed_duplex = e1000_phy_force_speed_duplex_m88;
break;
default:
ret_val = -E1000_ERR_PHY;
goto out;
}
out:
return ret_val;
}
/**
* e1000_init_nvm_params_82575 - Init NVM func ptrs.
* @hw: pointer to the HW structure
**/
s32 e1000_init_nvm_params_82575(struct e1000_hw *hw)
{
struct e1000_nvm_info *nvm = &hw->nvm;
u32 eecd = E1000_READ_REG(hw, E1000_EECD);
u16 size;
DEBUGFUNC("e1000_init_nvm_params_82575");
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;
/* Just in case size is out of range, cap it to the largest
* EEPROM size supported
*/
if (size > 15)
size = 15;
nvm->word_size = 1 << size;
if (hw->mac.type < e1000_i210) {
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;
}
if (nvm->word_size == (1 << 15))
nvm->page_size = 128;
nvm->type = e1000_nvm_eeprom_spi;
} else {
nvm->type = e1000_nvm_flash_hw;
}
/* Function Pointers */
nvm->ops.acquire = e1000_acquire_nvm_82575;
nvm->ops.release = e1000_release_nvm_82575;
if (nvm->word_size < (1 << 15))
nvm->ops.read = e1000_read_nvm_eerd;
else
nvm->ops.read = e1000_read_nvm_spi;
nvm->ops.write = e1000_write_nvm_spi;
nvm->ops.validate = e1000_validate_nvm_checksum_generic;
nvm->ops.update = e1000_update_nvm_checksum_generic;
nvm->ops.valid_led_default = e1000_valid_led_default_82575;
/* override generic family function pointers for specific descendants */
switch (hw->mac.type) {
case e1000_82580:
nvm->ops.validate = e1000_validate_nvm_checksum_82580;
nvm->ops.update = e1000_update_nvm_checksum_82580;
break;
case e1000_i350:
nvm->ops.validate = e1000_validate_nvm_checksum_i350;
nvm->ops.update = e1000_update_nvm_checksum_i350;
break;
default:
break;
}
return E1000_SUCCESS;
}
/**
* e1000_init_mac_params_82575 - Init MAC func ptrs.
* @hw: pointer to the HW structure
**/
static s32 e1000_init_mac_params_82575(struct e1000_hw *hw)
{
struct e1000_mac_info *mac = &hw->mac;
struct e1000_dev_spec_82575 *dev_spec = &hw->dev_spec._82575;
DEBUGFUNC("e1000_init_mac_params_82575");
/* Derives media type */
e1000_get_media_type_82575(hw);
/* Set mta register count */
mac->mta_reg_count = 128;
/* Set uta register count */
mac->uta_reg_count = (hw->mac.type == e1000_82575) ? 0 : 128;
/* Set rar entry count */
mac->rar_entry_count = E1000_RAR_ENTRIES_82575;
if (mac->type == e1000_82576)
mac->rar_entry_count = E1000_RAR_ENTRIES_82576;
if (mac->type == e1000_82580)
mac->rar_entry_count = E1000_RAR_ENTRIES_82580;
if (mac->type == e1000_i350) {
mac->rar_entry_count = E1000_RAR_ENTRIES_I350;
/* Enable EEE default settings for i350 */
dev_spec->eee_disable = FALSE;
}
/* Set if part includes ASF firmware */
mac->asf_firmware_present = TRUE;
/* FWSM register */
mac->has_fwsm = TRUE;
/* ARC supported; valid only if manageability features are enabled. */
mac->arc_subsystem_valid =
!!(E1000_READ_REG(hw, E1000_FWSM) & E1000_FWSM_MODE_MASK);
/* Function pointers */
/* bus type/speed/width */
mac->ops.get_bus_info = e1000_get_bus_info_pcie_generic;
/* reset */
if (mac->type >= e1000_82580)
mac->ops.reset_hw = e1000_reset_hw_82580;
else
mac->ops.reset_hw = e1000_reset_hw_82575;
/* hw initialization */
mac->ops.init_hw = e1000_init_hw_82575;
/* link setup */
mac->ops.setup_link = e1000_setup_link_generic;
/* physical interface link setup */
mac->ops.setup_physical_interface =
(hw->phy.media_type == e1000_media_type_copper)
? e1000_setup_copper_link_82575 : e1000_setup_serdes_link_82575;
/* physical interface shutdown */
mac->ops.shutdown_serdes = e1000_shutdown_serdes_link_82575;
/* physical interface power up */
mac->ops.power_up_serdes = e1000_power_up_serdes_link_82575;
/* check for link */
mac->ops.check_for_link = e1000_check_for_link_82575;
/* read mac address */
mac->ops.read_mac_addr = e1000_read_mac_addr_82575;
/* configure collision distance */
mac->ops.config_collision_dist = e1000_config_collision_dist_82575;
/* multicast address update */
mac->ops.update_mc_addr_list = e1000_update_mc_addr_list_generic;
if (hw->mac.type == e1000_i350) {
/* writing VFTA */
mac->ops.write_vfta = e1000_write_vfta_i350;
/* clearing VFTA */
mac->ops.clear_vfta = e1000_clear_vfta_i350;
} else {
/* writing VFTA */
mac->ops.write_vfta = e1000_write_vfta_generic;
/* clearing VFTA */
mac->ops.clear_vfta = e1000_clear_vfta_generic;
}
/* ID LED init */
mac->ops.id_led_init = e1000_id_led_init_generic;
/* blink LED */
mac->ops.blink_led = e1000_blink_led_generic;
/* setup LED */
mac->ops.setup_led = e1000_setup_led_generic;
/* cleanup LED */
mac->ops.cleanup_led = e1000_cleanup_led_generic;
/* turn on/off LED */
mac->ops.led_on = e1000_led_on_generic;
mac->ops.led_off = e1000_led_off_generic;
/* clear hardware counters */
mac->ops.clear_hw_cntrs = e1000_clear_hw_cntrs_82575;
/* link info */
mac->ops.get_link_up_info = e1000_get_link_up_info_82575;
/* acquire SW_FW sync */
mac->ops.acquire_swfw_sync = e1000_acquire_swfw_sync_82575;
mac->ops.release_swfw_sync = e1000_release_swfw_sync_82575;
if (mac->type >= e1000_i210) {
mac->ops.acquire_swfw_sync = e1000_acquire_swfw_sync_i210;
mac->ops.release_swfw_sync = e1000_release_swfw_sync_i210;
}
/* set lan id for port to determine which phy lock to use */
hw->mac.ops.set_lan_id(hw);
return E1000_SUCCESS;
}
/**
* e1000_init_function_pointers_82575 - Init func ptrs.
* @hw: pointer to the HW structure
*
* Called to initialize all function pointers and parameters.
**/
void e1000_init_function_pointers_82575(struct e1000_hw *hw)
{
DEBUGFUNC("e1000_init_function_pointers_82575");
hw->mac.ops.init_params = e1000_init_mac_params_82575;
hw->nvm.ops.init_params = e1000_init_nvm_params_82575;
hw->phy.ops.init_params = e1000_init_phy_params_82575;
hw->mbx.ops.init_params = e1000_init_mbx_params_pf;
}
/**
* e1000_acquire_phy_82575 - Acquire rights to access PHY
* @hw: pointer to the HW structure
*
* Acquire access rights to the correct PHY.
**/
static s32 e1000_acquire_phy_82575(struct e1000_hw *hw)
{
u16 mask = E1000_SWFW_PHY0_SM;
DEBUGFUNC("e1000_acquire_phy_82575");
if (hw->bus.func == E1000_FUNC_1)
mask = E1000_SWFW_PHY1_SM;
else if (hw->bus.func == E1000_FUNC_2)
mask = E1000_SWFW_PHY2_SM;
else if (hw->bus.func == E1000_FUNC_3)
mask = E1000_SWFW_PHY3_SM;
return hw->mac.ops.acquire_swfw_sync(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.
**/
static void e1000_release_phy_82575(struct e1000_hw *hw)
{
u16 mask = E1000_SWFW_PHY0_SM;
DEBUGFUNC("e1000_release_phy_82575");
if (hw->bus.func == E1000_FUNC_1)
mask = E1000_SWFW_PHY1_SM;
else if (hw->bus.func == E1000_FUNC_2)
mask = E1000_SWFW_PHY2_SM;
else if (hw->bus.func == E1000_FUNC_3)
mask = E1000_SWFW_PHY3_SM;
hw->mac.ops.release_swfw_sync(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 e1000_read_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset,
u16 *data)
{
s32 ret_val = -E1000_ERR_PARAM;
DEBUGFUNC("e1000_read_phy_reg_sgmii_82575");
if (offset > E1000_MAX_SGMII_PHY_REG_ADDR) {
DEBUGOUT1("PHY Address %u is out of range\n", offset);
goto out;
}
ret_val = hw->phy.ops.acquire(hw);
if (ret_val)
goto out;
ret_val = e1000_read_phy_reg_i2c(hw, offset, data);
hw->phy.ops.release(hw);
out:
return ret_val;
}
/**
* 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 e1000_write_phy_reg_sgmii_82575(struct e1000_hw *hw, u32 offset,
u16 data)
{
s32 ret_val = -E1000_ERR_PARAM;
DEBUGFUNC("e1000_write_phy_reg_sgmii_82575");
if (offset > E1000_MAX_SGMII_PHY_REG_ADDR) {
DEBUGOUT1("PHY Address %d is out of range\n", offset);
goto out;
}
ret_val = hw->phy.ops.acquire(hw);
if (ret_val)
goto out;
ret_val = e1000_write_phy_reg_i2c(hw, offset, data);
hw->phy.ops.release(hw);
out:
return ret_val;
}
/**
* e1000_get_phy_id_82575 - Retrieve PHY addr and id
* @hw: pointer to the HW structure
*
* Retrieves the PHY address and ID for both PHY's which do and do not use
* sgmi interface.
**/
static s32 e1000_get_phy_id_82575(struct e1000_hw *hw)
{
struct e1000_phy_info *phy = &hw->phy;
s32 ret_val = E1000_SUCCESS;
u16 phy_id;
u32 ctrl_ext;
u32 mdic;
DEBUGFUNC("e1000_get_phy_id_82575");
/*
* 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 (!e1000_sgmii_active_82575(hw)) {
phy->addr = 1;
ret_val = e1000_get_phy_id(hw);
goto out;
}
if (e1000_sgmii_uses_mdio_82575(hw)) {
switch (hw->mac.type) {
case e1000_82575:
case e1000_82576:
mdic = E1000_READ_REG(hw, E1000_MDIC);
mdic &= E1000_MDIC_PHY_MASK;
phy->addr = mdic >> E1000_MDIC_PHY_SHIFT;
break;
case e1000_82580:
case e1000_i350:
mdic = E1000_READ_REG(hw, E1000_MDICNFG);
mdic &= E1000_MDICNFG_PHY_MASK;
phy->addr = mdic >> E1000_MDICNFG_PHY_SHIFT;
break;
default:
ret_val = -E1000_ERR_PHY;
goto out;
break;
}
ret_val = e1000_get_phy_id(hw);
goto out;
}
/* Power on sgmii phy if it is disabled */
ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
E1000_WRITE_REG(hw, E1000_CTRL_EXT,
ctrl_ext & ~E1000_CTRL_EXT_SDP3_DATA);
E1000_WRITE_FLUSH(hw);
msec_delay(300);
/*
* 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 = e1000_read_phy_reg_sgmii_82575(hw, PHY_ID1, &phy_id);
if (ret_val == E1000_SUCCESS) {
DEBUGOUT2("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 {
DEBUGOUT1("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;
} else {
ret_val = e1000_get_phy_id(hw);
}
/* restore previous sfp cage power state */
E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);
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 e1000_phy_hw_reset_sgmii_82575(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
DEBUGFUNC("e1000_phy_hw_reset_sgmii_82575");
/*
* This isn't a TRUE "hard" reset, but is the only reset
* available to us at this time.
*/
DEBUGOUT("Soft resetting SGMII attached PHY...\n");
if (!(hw->phy.ops.write_reg))
goto out;
/*
* 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_reg(hw, 0x1B, 0x8084);
if (ret_val)
goto out;
ret_val = hw->phy.ops.commit(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 e1000_set_d0_lplu_state_82575(struct e1000_hw *hw, bool active)
{
struct e1000_phy_info *phy = &hw->phy;
s32 ret_val = E1000_SUCCESS;
u16 data;
DEBUGFUNC("e1000_set_d0_lplu_state_82575");
if (!(hw->phy.ops.read_reg))
goto out;
ret_val = phy->ops.read_reg(hw, IGP02E1000_PHY_POWER_MGMT, &data);
if (ret_val)
goto out;
if (active) {
data |= IGP02E1000_PM_D0_LPLU;
ret_val = phy->ops.write_reg(hw, IGP02E1000_PHY_POWER_MGMT,
data);
if (ret_val)
goto out;
/* When LPLU is enabled, we should disable SmartSpeed */
ret_val = phy->ops.read_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
&data);
data &= ~IGP01E1000_PSCFR_SMART_SPEED;
ret_val = phy->ops.write_reg(hw, IGP01E1000_PHY_PORT_CONFIG,
data);
if (ret_val)
goto out;
} else {
data &= ~IGP02E1000_PM_D0_LPLU;
ret_val = phy->ops.write_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 = phy->ops.read_reg(hw,
IGP01E1000_PHY_PORT_CONFIG,
&data);
if (ret_val)
goto out;
data |= IGP01E1000_PSCFR_SMART_SPEED;
ret_val = phy->ops.write_reg(hw,
IGP01E1000_PHY_PORT_CONFIG,
data);
if (ret_val)
goto out;
} else if (phy->smart_speed == e1000_smart_speed_off) {
ret_val = phy->ops.read_reg(hw,
IGP01E1000_PHY_PORT_CONFIG,
&data);
if (ret_val)
goto out;
data &= ~IGP01E1000_PSCFR_SMART_SPEED;
ret_val = phy->ops.write_reg(hw,
IGP01E1000_PHY_PORT_CONFIG,
data);
if (ret_val)
goto out;
}
}
out:
return ret_val;
}
/**
* e1000_set_d0_lplu_state_82580 - 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 e1000_set_d0_lplu_state_82580(struct e1000_hw *hw, bool active)
{
struct e1000_phy_info *phy = &hw->phy;
s32 ret_val = E1000_SUCCESS;
u32 data;
DEBUGFUNC("e1000_set_d0_lplu_state_82580");
data = E1000_READ_REG(hw, E1000_82580_PHY_POWER_MGMT);
if (active) {
data |= E1000_82580_PM_D0_LPLU;
/* When LPLU is enabled, we should disable SmartSpeed */
data &= ~E1000_82580_PM_SPD;
} else {
data &= ~E1000_82580_PM_D0_LPLU;
/*
* 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)
data |= E1000_82580_PM_SPD;
else if (phy->smart_speed == e1000_smart_speed_off)
data &= ~E1000_82580_PM_SPD;
}
E1000_WRITE_REG(hw, E1000_82580_PHY_POWER_MGMT, data);
return ret_val;
}
/**
* e1000_set_d3_lplu_state_82580 - Sets low power link up state for D3
* @hw: pointer to the HW structure
* @active: boolean used to enable/disable lplu
*
* Success returns 0, Failure returns 1
*
* The low power link up (lplu) state is set to the power management level D3
* and SmartSpeed is disabled when active is TRUE, else clear lplu for D3
* and enable Smartspeed. LPLU and Smartspeed are mutually exclusive. LPLU
* is used during Dx states where the power conservation is most important.
* During driver activity, SmartSpeed should be enabled so performance is
* maintained.
**/
s32 e1000_set_d3_lplu_state_82580(struct e1000_hw *hw, bool active)
{
struct e1000_phy_info *phy = &hw->phy;
s32 ret_val = E1000_SUCCESS;
u32 data;
DEBUGFUNC("e1000_set_d3_lplu_state_82580");
data = E1000_READ_REG(hw, E1000_82580_PHY_POWER_MGMT);
if (!active) {
data &= ~E1000_82580_PM_D3_LPLU;
/*
* 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)
data |= E1000_82580_PM_SPD;
else if (phy->smart_speed == e1000_smart_speed_off)
data &= ~E1000_82580_PM_SPD;
} else if ((phy->autoneg_advertised == E1000_ALL_SPEED_DUPLEX) ||
(phy->autoneg_advertised == E1000_ALL_NOT_GIG) ||
(phy->autoneg_advertised == E1000_ALL_10_SPEED)) {
data |= E1000_82580_PM_D3_LPLU;
/* When LPLU is enabled, we should disable SmartSpeed */
data &= ~E1000_82580_PM_SPD;
}
E1000_WRITE_REG(hw, E1000_82580_PHY_POWER_MGMT, data);
return ret_val;
}
/**
* e1000_acquire_nvm_82575 - Request for access to EEPROM
* @hw: pointer to the HW structure
*
* Acquire the necessary semaphores for exclusive 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 e1000_acquire_nvm_82575(struct e1000_hw *hw)
{
s32 ret_val;
DEBUGFUNC("e1000_acquire_nvm_82575");
ret_val = e1000_acquire_swfw_sync_82575(hw, E1000_SWFW_EEP_SM);
if (ret_val)
goto out;
/*
* Check if there is some access
* error this access may hook on
*/
if (hw->mac.type == e1000_i350) {
u32 eecd = E1000_READ_REG(hw, E1000_EECD);
if (eecd & (E1000_EECD_BLOCKED | E1000_EECD_ABORT |
E1000_EECD_TIMEOUT)) {
/* Clear all access error flags */
E1000_WRITE_REG(hw, E1000_EECD, eecd |
E1000_EECD_ERROR_CLR);
DEBUGOUT("Nvm bit banging access error detected and cleared.\n");
}
}
if (hw->mac.type == e1000_82580) {
u32 eecd = E1000_READ_REG(hw, E1000_EECD);
if (eecd & E1000_EECD_BLOCKED) {
/* Clear access error flag */
E1000_WRITE_REG(hw, E1000_EECD, eecd |
E1000_EECD_BLOCKED);
DEBUGOUT("Nvm bit banging access error detected and cleared.\n");
}
}
ret_val = e1000_acquire_nvm_generic(hw);
if (ret_val)
e1000_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 e1000_release_nvm_82575(struct e1000_hw *hw)
{
DEBUGFUNC("e1000_release_nvm_82575");
e1000_release_nvm_generic(hw);
e1000_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 e1000_acquire_swfw_sync_82575(struct e1000_hw *hw, u16 mask)
{
u32 swfw_sync;
u32 swmask = mask;
u32 fwmask = mask << 16;
s32 ret_val = E1000_SUCCESS;
s32 i = 0, timeout = 200; /* FIXME: find real value to use here */
DEBUGFUNC("e1000_acquire_swfw_sync_82575");
while (i < timeout) {
if (e1000_get_hw_semaphore_generic(hw)) {
ret_val = -E1000_ERR_SWFW_SYNC;
goto out;
}
swfw_sync = E1000_READ_REG(hw, E1000_SW_FW_SYNC);
if (!(swfw_sync & (fwmask | swmask)))
break;
/*
* Firmware currently using resource (fwmask)
* or other software thread using resource (swmask)
*/
e1000_put_hw_semaphore_generic(hw);
msec_delay_irq(5);
i++;
}
if (i == timeout) {
DEBUGOUT("Driver can't access resource, SW_FW_SYNC timeout.\n");
ret_val = -E1000_ERR_SWFW_SYNC;
goto out;
}
swfw_sync |= swmask;
E1000_WRITE_REG(hw, E1000_SW_FW_SYNC, swfw_sync);
e1000_put_hw_semaphore_generic(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 e1000_release_swfw_sync_82575(struct e1000_hw *hw, u16 mask)
{
u32 swfw_sync;
DEBUGFUNC("e1000_release_swfw_sync_82575");
while (e1000_get_hw_semaphore_generic(hw) != E1000_SUCCESS)
; /* Empty */
swfw_sync = E1000_READ_REG(hw, E1000_SW_FW_SYNC);
swfw_sync &= ~mask;
E1000_WRITE_REG(hw, E1000_SW_FW_SYNC, swfw_sync);
e1000_put_hw_semaphore_generic(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
* E1000_SUCCESS. If we were to return with error, EEPROM-less silicon
* would not be able to be reset or change link.
**/
static s32 e1000_get_cfg_done_82575(struct e1000_hw *hw)
{
s32 timeout = PHY_CFG_TIMEOUT;
s32 ret_val = E1000_SUCCESS;
u32 mask = E1000_NVM_CFG_DONE_PORT_0;
DEBUGFUNC("e1000_get_cfg_done_82575");
if (hw->bus.func == E1000_FUNC_1)
mask = E1000_NVM_CFG_DONE_PORT_1;
else if (hw->bus.func == E1000_FUNC_2)
mask = E1000_NVM_CFG_DONE_PORT_2;
else if (hw->bus.func == E1000_FUNC_3)
mask = E1000_NVM_CFG_DONE_PORT_3;
while (timeout) {
if (E1000_READ_REG(hw, E1000_EEMNGCTL) & mask)
break;
msec_delay(1);
timeout--;
}
if (!timeout)
DEBUGOUT("MNG configuration cycle has not completed.\n");
/* If EEPROM is not marked present, init the PHY manually */
if (!(E1000_READ_REG(hw, E1000_EECD) & E1000_EECD_PRES) &&
(hw->phy.type == e1000_phy_igp_3))
e1000_phy_init_script_igp3(hw);
return ret_val;
}
/**
* e1000_get_link_up_info_82575 - Get link speed/duplex info
* @hw: pointer to the HW structure
* @speed: stores the current speed
* @duplex: stores the current duplex
*
* This is a wrapper function, if using the serial gigabit media independent
* interface, use PCS to retrieve the link speed and duplex information.
* Otherwise, use the generic function to get the link speed and duplex info.
**/
static s32 e1000_get_link_up_info_82575(struct e1000_hw *hw, u16 *speed,
u16 *duplex)
{
s32 ret_val;
DEBUGFUNC("e1000_get_link_up_info_82575");
if (hw->phy.media_type != e1000_media_type_copper)
ret_val = e1000_get_pcs_speed_and_duplex_82575(hw, speed,
duplex);
else
ret_val = e1000_get_speed_and_duplex_copper_generic(hw, speed,
duplex);
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 e1000_check_for_link_82575(struct e1000_hw *hw)
{
s32 ret_val;
u16 speed, duplex;
DEBUGFUNC("e1000_check_for_link_82575");
if (hw->phy.media_type != e1000_media_type_copper) {
ret_val = e1000_get_pcs_speed_and_duplex_82575(hw, &speed,
&duplex);
/*
* Use this flag to determine if link needs to be checked or
* not. If we have link clear the flag so that we do not
* continue to check for link.
*/
hw->mac.get_link_status = !hw->mac.serdes_has_link;
} else {
ret_val = e1000_check_for_copper_link_generic(hw);
}
return ret_val;
}
/**
* e1000_power_up_serdes_link_82575 - Power up the serdes link after shutdown
* @hw: pointer to the HW structure
**/
static void e1000_power_up_serdes_link_82575(struct e1000_hw *hw)
{
u32 reg;
DEBUGFUNC("e1000_power_up_serdes_link_82575");
if ((hw->phy.media_type != e1000_media_type_internal_serdes) &&
!e1000_sgmii_active_82575(hw))
return;
/* Enable PCS to turn on link */
reg = E1000_READ_REG(hw, E1000_PCS_CFG0);
reg |= E1000_PCS_CFG_PCS_EN;
E1000_WRITE_REG(hw, E1000_PCS_CFG0, reg);
/* Power up the laser */
reg = E1000_READ_REG(hw, E1000_CTRL_EXT);
reg &= ~E1000_CTRL_EXT_SDP3_DATA;
E1000_WRITE_REG(hw, E1000_CTRL_EXT, reg);
/* flush the write to verify completion */
E1000_WRITE_FLUSH(hw);
msec_delay(1);
}
/**
* 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), retrieve the current speed and
* duplex, then store the values in the pointers provided.
**/
static s32 e1000_get_pcs_speed_and_duplex_82575(struct e1000_hw *hw,
u16 *speed, u16 *duplex)
{
struct e1000_mac_info *mac = &hw->mac;
u32 pcs;
DEBUGFUNC("e1000_get_pcs_speed_and_duplex_82575");
/*
* 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 = E1000_READ_REG(hw, E1000_PCS_LSTAT);
/*
* The link up bit determines when link is up on autoneg.
*/
if (pcs & E1000_PCS_LSTS_LINK_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;
} else {
mac->serdes_has_link = FALSE;
*speed = 0;
*duplex = 0;
}
return E1000_SUCCESS;
}
/**
* e1000_shutdown_serdes_link_82575 - Remove link during power down
* @hw: pointer to the HW structure
*
* In the case of serdes shut down sfp and PCS on driver unload
* when management pass thru is not enabled.
**/
void e1000_shutdown_serdes_link_82575(struct e1000_hw *hw)
{
u32 reg;
DEBUGFUNC("e1000_shutdown_serdes_link_82575");
if ((hw->phy.media_type != e1000_media_type_internal_serdes) &&
!e1000_sgmii_active_82575(hw))
return;
if (!e1000_enable_mng_pass_thru(hw)) {
/* Disable PCS to turn off link */
reg = E1000_READ_REG(hw, E1000_PCS_CFG0);
reg &= ~E1000_PCS_CFG_PCS_EN;
E1000_WRITE_REG(hw, E1000_PCS_CFG0, reg);
/* shutdown the laser */
reg = E1000_READ_REG(hw, E1000_CTRL_EXT);
reg |= E1000_CTRL_EXT_SDP3_DATA;
E1000_WRITE_REG(hw, E1000_CTRL_EXT, reg);
/* flush the write to verify completion */
E1000_WRITE_FLUSH(hw);
msec_delay(1);
}
return;
}
/**
* e1000_reset_hw_82575 - Reset hardware
* @hw: pointer to the HW structure
*
* This resets the hardware into a known state.
**/
static s32 e1000_reset_hw_82575(struct e1000_hw *hw)
{
u32 ctrl;
s32 ret_val;
DEBUGFUNC("e1000_reset_hw_82575");
/*
* 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 = e1000_disable_pcie_master_generic(hw);
if (ret_val)
DEBUGOUT("PCI-E Master disable polling has failed.\n");
/* set the completion timeout for interface */
ret_val = e1000_set_pcie_completion_timeout(hw);
if (ret_val)
DEBUGOUT("PCI-E Set completion timeout has failed.\n");
DEBUGOUT("Masking off all interrupts\n");
E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
E1000_WRITE_REG(hw, E1000_RCTL, 0);
E1000_WRITE_REG(hw, E1000_TCTL, E1000_TCTL_PSP);
E1000_WRITE_FLUSH(hw);
msec_delay(10);
ctrl = E1000_READ_REG(hw, E1000_CTRL);
DEBUGOUT("Issuing a global reset to MAC\n");
E1000_WRITE_REG(hw, E1000_CTRL, ctrl | E1000_CTRL_RST);
ret_val = e1000_get_auto_rd_done_generic(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.
*/
DEBUGOUT("Auto Read Done did not complete\n");
}
/* If EEPROM is not present, run manual init scripts */
if (!(E1000_READ_REG(hw, E1000_EECD) & E1000_EECD_PRES))
e1000_reset_init_script_82575(hw);
/* Clear any pending interrupt events. */
E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
E1000_READ_REG(hw, E1000_ICR);
/* Install any alternate MAC address into RAR0 */
ret_val = e1000_check_alt_mac_addr_generic(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 e1000_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;
DEBUGFUNC("e1000_init_hw_82575");
/* Initialize identification LED */
ret_val = mac->ops.id_led_init(hw);
if (ret_val) {
DEBUGOUT("Error initializing identification LED\n");
/* This is not fatal and we should not stop init due to this */
}
/* Disabling VLAN filtering */
DEBUGOUT("Initializing the IEEE VLAN\n");
mac->ops.clear_vfta(hw);
/* Setup the receive address */
e1000_init_rx_addrs_generic(hw, rar_count);
/* Zero out the Multicast HASH table */
DEBUGOUT("Zeroing the MTA\n");
for (i = 0; i < mac->mta_reg_count; i++)
E1000_WRITE_REG_ARRAY(hw, E1000_MTA, i, 0);
/* Zero out the Unicast HASH table */
DEBUGOUT("Zeroing the UTA\n");
for (i = 0; i < mac->uta_reg_count; i++)
E1000_WRITE_REG_ARRAY(hw, E1000_UTA, i, 0);
/* Setup link and flow control */
ret_val = mac->ops.setup_link(hw);
/* Set the default MTU size */
hw->dev_spec._82575.mtu = 1500;
/*
* 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.
*/
e1000_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 e1000_setup_copper_link_82575(struct e1000_hw *hw)
{
u32 ctrl;
s32 ret_val;
DEBUGFUNC("e1000_setup_copper_link_82575");
ctrl = E1000_READ_REG(hw, E1000_CTRL);
ctrl |= E1000_CTRL_SLU;
ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
ret_val = e1000_setup_serdes_link_82575(hw);
if (ret_val)
goto out;
if (e1000_sgmii_active_82575(hw)) {
/* allow time for SFP cage time to power up phy */
msec_delay(300);
ret_val = hw->phy.ops.reset(hw);
if (ret_val) {
DEBUGOUT("Error resetting the PHY.\n");
goto out;
}
}
switch (hw->phy.type) {
case e1000_phy_i210:
case e1000_phy_m88:
if (hw->phy.id == I347AT4_E_PHY_ID ||
hw->phy.id == M88E1112_E_PHY_ID ||
hw->phy.id == M88E1340M_E_PHY_ID)
ret_val = e1000_copper_link_setup_m88_gen2(hw);
else
ret_val = e1000_copper_link_setup_m88(hw);
break;
case e1000_phy_igp_3:
ret_val = e1000_copper_link_setup_igp(hw);
break;
case e1000_phy_82580:
ret_val = e1000_copper_link_setup_82577(hw);
break;
default:
ret_val = -E1000_ERR_PHY;
break;
}
if (ret_val)
goto out;
ret_val = e1000_setup_copper_link_generic(hw);
out:
return ret_val;
}
/**
* e1000_setup_serdes_link_82575 - Setup link for serdes
* @hw: pointer to the HW structure
*
* Configure the physical coding sub-layer (PCS) link. The PCS link is
* used on copper connections where the serialized gigabit media independent
* interface (sgmii), or serdes fiber is being used. Configures the link
* for auto-negotiation or forces speed/duplex.
**/
static s32 e1000_setup_serdes_link_82575(struct e1000_hw *hw)
{
u32 ctrl_ext, ctrl_reg, reg;
bool pcs_autoneg;
s32 ret_val = E1000_SUCCESS;
u16 data;
DEBUGFUNC("e1000_setup_serdes_link_82575");
if ((hw->phy.media_type != e1000_media_type_internal_serdes) &&
!e1000_sgmii_active_82575(hw))
return ret_val;
/*
* 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.
*/
E1000_WRITE_REG(hw, E1000_SCTL, E1000_SCTL_DISABLE_SERDES_LOOPBACK);
/* power on the sfp cage if present */
ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
ctrl_ext &= ~E1000_CTRL_EXT_SDP3_DATA;
E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);
ctrl_reg = E1000_READ_REG(hw, E1000_CTRL);
ctrl_reg |= E1000_CTRL_SLU;
/* set both sw defined pins on 82575/82576*/
if (hw->mac.type == e1000_82575 || hw->mac.type == e1000_82576)
ctrl_reg |= E1000_CTRL_SWDPIN0 | E1000_CTRL_SWDPIN1;
reg = E1000_READ_REG(hw, E1000_PCS_LCTL);
/* default pcs_autoneg to the same setting as mac autoneg */
pcs_autoneg = hw->mac.autoneg;
switch (ctrl_ext & E1000_CTRL_EXT_LINK_MODE_MASK) {
case E1000_CTRL_EXT_LINK_MODE_SGMII:
/* sgmii mode lets the phy handle forcing speed/duplex */
pcs_autoneg = TRUE;
/* autoneg time out should be disabled for SGMII mode */
reg &= ~(E1000_PCS_LCTL_AN_TIMEOUT);
break;
case E1000_CTRL_EXT_LINK_MODE_1000BASE_KX:
/* disable PCS autoneg and support parallel detect only */
pcs_autoneg = FALSE;
/* fall through to default case */
default:
if (hw->mac.type == e1000_82575 ||
hw->mac.type == e1000_82576) {
ret_val = hw->nvm.ops.read(hw, NVM_COMPAT, 1, &data);
if (ret_val) {
DEBUGOUT("NVM Read Error\n");
return ret_val;
}
if (data & E1000_EEPROM_PCS_AUTONEG_DISABLE_BIT)
pcs_autoneg = FALSE;
}
/*
* non-SGMII modes only supports a speed of 1000/Full for the
* link so it is best to just force the MAC and let the pcs
* link either autoneg or be forced to 1000/Full
*/
ctrl_reg |= E1000_CTRL_SPD_1000 | E1000_CTRL_FRCSPD |
E1000_CTRL_FD | E1000_CTRL_FRCDPX;
/* set speed of 1000/Full if speed/duplex is forced */
reg |= E1000_PCS_LCTL_FSV_1000 | E1000_PCS_LCTL_FDV_FULL;
break;
}
E1000_WRITE_REG(hw, E1000_CTRL, ctrl_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 &= ~(E1000_PCS_LCTL_AN_ENABLE | E1000_PCS_LCTL_FLV_LINK_UP |
E1000_PCS_LCTL_FSD | E1000_PCS_LCTL_FORCE_LINK);
/*
* We force flow control to prevent the CTRL register values from being
* overwritten by the autonegotiated flow control values
*/
reg |= E1000_PCS_LCTL_FORCE_FCTRL;
if (pcs_autoneg) {
/* Set PCS register for autoneg */
reg |= E1000_PCS_LCTL_AN_ENABLE | /* Enable Autoneg */
E1000_PCS_LCTL_AN_RESTART; /* Restart autoneg */
DEBUGOUT1("Configuring Autoneg:PCS_LCTL=0x%08X\n", reg);
} else {
/* Set PCS register for forced link */
reg |= E1000_PCS_LCTL_FSD; /* Force Speed */
DEBUGOUT1("Configuring Forced Link:PCS_LCTL=0x%08X\n", reg);
}
E1000_WRITE_REG(hw, E1000_PCS_LCTL, reg);
if (!e1000_sgmii_active_82575(hw))
e1000_force_mac_fc_generic(hw);
return ret_val;
}
/**
* e1000_get_media_type_82575 - derives current media type.
* @hw: pointer to the HW structure
*
* The media type is chosen reflecting few settings.
* The following are taken into account:
* - link mode set in the current port Init Control Word #3
* - current link mode settings in CSR register
* - MDIO vs. I2C PHY control interface chosen
* - SFP module media type
**/
static s32 e1000_get_media_type_82575(struct e1000_hw *hw)
{
u32 lan_id = 0;
s32 ret_val = E1000_ERR_CONFIG;
struct e1000_dev_spec_82575 *dev_spec = &hw->dev_spec._82575;
u32 ctrl_ext = 0;
u32 current_link_mode = 0;
u16 init_ctrl_wd_3 = 0;
u8 init_ctrl_wd_3_offset = 0;
u8 init_ctrl_wd_3_bit_offset = 0;
/* Set internal phy as default */
dev_spec->sgmii_active = FALSE;
dev_spec->module_plugged = FALSE;
/*
* Check if NVM access method is attached already.
* If it is then Init Control Word #3 is considered
* otherwise runtime CSR register content is taken.
*/
/* Get CSR setting */
ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
/* Get link mode setting */
if ((hw->nvm.ops.read) && (hw->nvm.ops.read != e1000_null_read_nvm)) {
/* Take link mode from EEPROM */
/*
* Get LAN port ID to derive its
* adequate Init Control Word #3
*/
lan_id = ((E1000_READ_REG(hw, E1000_STATUS) &
E1000_STATUS_LAN_ID_MASK) >> E1000_STATUS_LAN_ID_OFFSET);
/*
* Derive Init Control Word #3 offset
* and mask to pick up link mode setting.
*/
if (hw->mac.type < e1000_82580) {
init_ctrl_wd_3_offset = lan_id ?
NVM_INIT_CONTROL3_PORT_A : NVM_INIT_CONTROL3_PORT_B;
init_ctrl_wd_3_bit_offset = NVM_WORD24_LNK_MODE_OFFSET;
} else {
init_ctrl_wd_3_offset =
NVM_82580_LAN_FUNC_OFFSET(lan_id) +
NVM_INIT_CONTROL3_PORT_A;
init_ctrl_wd_3_bit_offset =
NVM_WORD24_82580_LNK_MODE_OFFSET;
}
/* Read Init Control Word #3*/
hw->nvm.ops.read(hw, init_ctrl_wd_3_offset, 1, &init_ctrl_wd_3);
/*
* Align link mode bits to
* their CTRL_EXT location.
*/
current_link_mode = init_ctrl_wd_3;
current_link_mode <<= (E1000_CTRL_EXT_LINK_MODE_OFFSET -
init_ctrl_wd_3_bit_offset);
current_link_mode &= E1000_CTRL_EXT_LINK_MODE_MASK;
/*
* Switch to CSR for all but internal PHY.
*/
if (current_link_mode != E1000_CTRL_EXT_LINK_MODE_GMII)
/* Take link mode from CSR */
current_link_mode = ctrl_ext &
E1000_CTRL_EXT_LINK_MODE_MASK;
} else {
/* Take link mode from CSR */
current_link_mode = ctrl_ext & E1000_CTRL_EXT_LINK_MODE_MASK;
}
switch (current_link_mode) {
case E1000_CTRL_EXT_LINK_MODE_1000BASE_KX:
hw->phy.media_type = e1000_media_type_internal_serdes;
current_link_mode = E1000_CTRL_EXT_LINK_MODE_1000BASE_KX;
break;
case E1000_CTRL_EXT_LINK_MODE_GMII:
hw->phy.media_type = e1000_media_type_copper;
current_link_mode = E1000_CTRL_EXT_LINK_MODE_GMII;
break;
case E1000_CTRL_EXT_LINK_MODE_SGMII:
case E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES:
/* Get phy control interface type set (MDIO vs. I2C)*/
if (e1000_sgmii_uses_mdio_82575(hw)) {
hw->phy.media_type = e1000_media_type_copper;
dev_spec->sgmii_active = TRUE;
current_link_mode = E1000_CTRL_EXT_LINK_MODE_SGMII;
} else {
ret_val = e1000_set_sfp_media_type_82575(hw);
if (ret_val != E1000_SUCCESS)
goto out;
if (hw->phy.media_type ==
e1000_media_type_internal_serdes) {
current_link_mode =
E1000_CTRL_EXT_LINK_MODE_PCIE_SERDES;
} else if (hw->phy.media_type ==
e1000_media_type_copper) {
current_link_mode =
E1000_CTRL_EXT_LINK_MODE_SGMII;
}
}
break;
default:
DEBUGOUT("Link mode mask doesn't fit bit field size\n");
goto out;
}
/*
* Do not change current link mode setting
* if media type is fibre or has not been
* recognized.
*/
if ((hw->phy.media_type != e1000_media_type_unknown) &&
(hw->phy.media_type != e1000_media_type_fiber)) {
/* Update link mode */
ctrl_ext &= ~E1000_CTRL_EXT_LINK_MODE_MASK;
E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext |
current_link_mode);
}
ret_val = E1000_SUCCESS;
out:
/*
* If media type was not identified then return media type
* defined by the CTRL_EXT settings.
*/
if (hw->phy.media_type == e1000_media_type_unknown) {
if (current_link_mode == E1000_CTRL_EXT_LINK_MODE_SGMII)
hw->phy.media_type = e1000_media_type_copper;
else
hw->phy.media_type = e1000_media_type_internal_serdes;
}
return ret_val;
}
/**
* e1000_set_sfp_media_type_82575 - derives SFP module media type.
* @hw: pointer to the HW structure
*
* The media type is chosen based on SFP module.
* compatibility flags retrieved from SFP ID EEPROM.
**/
static s32 e1000_set_sfp_media_type_82575(struct e1000_hw *hw)
{
s32 ret_val = E1000_ERR_CONFIG;
u32 ctrl_ext = 0;
struct e1000_dev_spec_82575 *dev_spec = &hw->dev_spec._82575;
struct sfp_e1000_flags eth_flags = {0};
u8 tranceiver_type = 0;
/* Turn I2C interface ON */
ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext | E1000_CTRL_I2C_ENA);
/* Read SFP module data */
ret_val = e1000_read_sfp_data_byte(hw,
E1000_I2CCMD_SFP_DATA_ADDR(E1000_SFF_IDENTIFIER_OFFSET),
&tranceiver_type);
if (ret_val != E1000_SUCCESS)
goto out;
ret_val = e1000_read_sfp_data_byte(hw,
E1000_I2CCMD_SFP_DATA_ADDR(E1000_SFF_ETH_FLAGS_OFFSET),
(u8 *)ð_flags);
if (ret_val != E1000_SUCCESS)
goto out;
/*
* Check if there is some SFP
* module plugged and powered
*/
if ((tranceiver_type == E1000_SFF_IDENTIFIER_SFP) ||
(tranceiver_type == E1000_SFF_IDENTIFIER_SFF)) {
dev_spec->module_plugged = TRUE;
if (eth_flags.e1000_base_lx || eth_flags.e1000_base_sx) {
hw->phy.media_type = e1000_media_type_internal_serdes;
} else if (eth_flags.e1000_base_t) {
dev_spec->sgmii_active = TRUE;
hw->phy.media_type = e1000_media_type_copper;
} else {
hw->phy.media_type = e1000_media_type_unknown;
DEBUGOUT("PHY module has not been recognized\n");
goto out;
}
} else {
hw->phy.media_type = e1000_media_type_unknown;
}
ret_val = E1000_SUCCESS;
out:
/* Restore I2C interface setting */
E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);
return ret_val;
}
/**
* e1000_valid_led_default_82575 - Verify a valid default LED config
* @hw: pointer to the HW structure
* @data: pointer to the NVM (EEPROM)
*
* Read the EEPROM for the current default LED configuration. If the
* LED configuration is not valid, set to a valid LED configuration.
**/
static s32 e1000_valid_led_default_82575(struct e1000_hw *hw, u16 *data)
{
s32 ret_val;
DEBUGFUNC("e1000_valid_led_default_82575");
ret_val = hw->nvm.ops.read(hw, NVM_ID_LED_SETTINGS, 1, data);
if (ret_val) {
DEBUGOUT("NVM Read Error\n");
goto out;
}
if (*data == ID_LED_RESERVED_0000 || *data == ID_LED_RESERVED_FFFF) {
switch (hw->phy.media_type) {
case e1000_media_type_internal_serdes:
*data = ID_LED_DEFAULT_82575_SERDES;
break;
case e1000_media_type_copper:
default:
*data = ID_LED_DEFAULT;
break;
}
}
out:
return ret_val;
}
/**
* 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 e1000_sgmii_active_82575(struct e1000_hw *hw)
{
struct e1000_dev_spec_82575 *dev_spec = &hw->dev_spec._82575;
return dev_spec->sgmii_active;
}
/**
* 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 e1000_reset_init_script_82575(struct e1000_hw *hw)
{
DEBUGFUNC("e1000_reset_init_script_82575");
if (hw->mac.type == e1000_82575) {
DEBUGOUT("Running reset init script for 82575\n");
/* SerDes configuration via SERDESCTRL */
e1000_write_8bit_ctrl_reg_generic(hw, E1000_SCTL, 0x00, 0x0C);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_SCTL, 0x01, 0x78);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_SCTL, 0x1B, 0x23);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_SCTL, 0x23, 0x15);
/* CCM configuration via CCMCTL register */
e1000_write_8bit_ctrl_reg_generic(hw, E1000_CCMCTL, 0x14, 0x00);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_CCMCTL, 0x10, 0x00);
/* PCIe lanes configuration */
e1000_write_8bit_ctrl_reg_generic(hw, E1000_GIOCTL, 0x00, 0xEC);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_GIOCTL, 0x61, 0xDF);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_GIOCTL, 0x34, 0x05);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_GIOCTL, 0x2F, 0x81);
/* PCIe PLL Configuration */
e1000_write_8bit_ctrl_reg_generic(hw, E1000_SCCTL, 0x02, 0x47);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_SCCTL, 0x14, 0x00);
e1000_write_8bit_ctrl_reg_generic(hw, E1000_SCCTL, 0x10, 0x00);
}
return E1000_SUCCESS;
}
/**
* e1000_read_mac_addr_82575 - Read device MAC address
* @hw: pointer to the HW structure
**/
static s32 e1000_read_mac_addr_82575(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
DEBUGFUNC("e1000_read_mac_addr_82575");
/*
* If there's an alternate MAC address place it in RAR0
* so that it will override the Si installed default perm
* address.
*/
ret_val = e1000_check_alt_mac_addr_generic(hw);
if (ret_val)
goto out;
ret_val = e1000_read_mac_addr_generic(hw);
out:
return ret_val;
}
/**
* e1000_config_collision_dist_82575 - Configure collision distance
* @hw: pointer to the HW structure
*
* Configures the collision distance to the default value and is used
* during link setup.
**/
static void e1000_config_collision_dist_82575(struct e1000_hw *hw)
{
u32 tctl_ext;
DEBUGFUNC("e1000_config_collision_dist_82575");
tctl_ext = E1000_READ_REG(hw, E1000_TCTL_EXT);
tctl_ext &= ~E1000_TCTL_EXT_COLD;
tctl_ext |= E1000_COLLISION_DISTANCE << E1000_TCTL_EXT_COLD_SHIFT;
E1000_WRITE_REG(hw, E1000_TCTL_EXT, tctl_ext);
E1000_WRITE_FLUSH(hw);
}
/**
* e1000_power_down_phy_copper_82575 - Remove link during PHY power down
* @hw: pointer to the HW structure
*
* In the case of a PHY power down to save power, or to turn off link during a
* driver unload, or wake on lan is not enabled, remove the link.
**/
static void e1000_power_down_phy_copper_82575(struct e1000_hw *hw)
{
struct e1000_phy_info *phy = &hw->phy;
if (!(phy->ops.check_reset_block))
return;
/* If the management interface is not enabled, then power down */
if (!(e1000_enable_mng_pass_thru(hw) || phy->ops.check_reset_block(hw)))
e1000_power_down_phy_copper(hw);
return;
}
/**
* 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 e1000_clear_hw_cntrs_82575(struct e1000_hw *hw)
{
DEBUGFUNC("e1000_clear_hw_cntrs_82575");
e1000_clear_hw_cntrs_base_generic(hw);
E1000_READ_REG(hw, E1000_PRC64);
E1000_READ_REG(hw, E1000_PRC127);
E1000_READ_REG(hw, E1000_PRC255);
E1000_READ_REG(hw, E1000_PRC511);
E1000_READ_REG(hw, E1000_PRC1023);
E1000_READ_REG(hw, E1000_PRC1522);
E1000_READ_REG(hw, E1000_PTC64);
E1000_READ_REG(hw, E1000_PTC127);
E1000_READ_REG(hw, E1000_PTC255);
E1000_READ_REG(hw, E1000_PTC511);
E1000_READ_REG(hw, E1000_PTC1023);
E1000_READ_REG(hw, E1000_PTC1522);
E1000_READ_REG(hw, E1000_ALGNERRC);
E1000_READ_REG(hw, E1000_RXERRC);
E1000_READ_REG(hw, E1000_TNCRS);
E1000_READ_REG(hw, E1000_CEXTERR);
E1000_READ_REG(hw, E1000_TSCTC);
E1000_READ_REG(hw, E1000_TSCTFC);
E1000_READ_REG(hw, E1000_MGTPRC);
E1000_READ_REG(hw, E1000_MGTPDC);
E1000_READ_REG(hw, E1000_MGTPTC);
E1000_READ_REG(hw, E1000_IAC);
E1000_READ_REG(hw, E1000_ICRXOC);
E1000_READ_REG(hw, E1000_ICRXPTC);
E1000_READ_REG(hw, E1000_ICRXATC);
E1000_READ_REG(hw, E1000_ICTXPTC);
E1000_READ_REG(hw, E1000_ICTXATC);
E1000_READ_REG(hw, E1000_ICTXQEC);
E1000_READ_REG(hw, E1000_ICTXQMTC);
E1000_READ_REG(hw, E1000_ICRXDMTC);
E1000_READ_REG(hw, E1000_CBTMPC);
E1000_READ_REG(hw, E1000_HTDPMC);
E1000_READ_REG(hw, E1000_CBRMPC);
E1000_READ_REG(hw, E1000_RPTHC);
E1000_READ_REG(hw, E1000_HGPTC);
E1000_READ_REG(hw, E1000_HTCBDPC);
E1000_READ_REG(hw, E1000_HGORCL);
E1000_READ_REG(hw, E1000_HGORCH);
E1000_READ_REG(hw, E1000_HGOTCL);
E1000_READ_REG(hw, E1000_HGOTCH);
E1000_READ_REG(hw, E1000_LENERRS);
/* This register should not be read in copper configurations */
if ((hw->phy.media_type == e1000_media_type_internal_serdes) ||
e1000_sgmii_active_82575(hw))
E1000_READ_REG(hw, E1000_SCVPC);
}
/**
* e1000_rx_fifo_flush_82575 - Clean rx fifo after Rx enable
* @hw: pointer to the HW structure
*
* After rx enable if managability is enabled then there is likely some
* bad data at the start of the fifo and possibly in the DMA fifo. This
* function clears the fifos and flushes any packets that came in as rx was
* being enabled.
**/
void e1000_rx_fifo_flush_82575(struct e1000_hw *hw)
{
u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled;
int i, ms_wait;
DEBUGFUNC("e1000_rx_fifo_workaround_82575");
if (hw->mac.type != e1000_82575 ||
!(E1000_READ_REG(hw, E1000_MANC) & E1000_MANC_RCV_TCO_EN))
return;
/* Disable all Rx queues */
for (i = 0; i < 4; i++) {
rxdctl[i] = E1000_READ_REG(hw, E1000_RXDCTL(i));
E1000_WRITE_REG(hw, E1000_RXDCTL(i),
rxdctl[i] & ~E1000_RXDCTL_QUEUE_ENABLE);
}
/* Poll all queues to verify they have shut down */
for (ms_wait = 0; ms_wait < 10; ms_wait++) {
msec_delay(1);
rx_enabled = 0;
for (i = 0; i < 4; i++)
rx_enabled |= E1000_READ_REG(hw, E1000_RXDCTL(i));
if (!(rx_enabled & E1000_RXDCTL_QUEUE_ENABLE))
break;
}
if (ms_wait == 10)
DEBUGOUT("Queue disable timed out after 10ms\n");
/* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all
* incoming packets are rejected. Set enable and wait 2ms so that
* any packet that was coming in as RCTL.EN was set is flushed
*/
rfctl = E1000_READ_REG(hw, E1000_RFCTL);
E1000_WRITE_REG(hw, E1000_RFCTL, rfctl & ~E1000_RFCTL_LEF);
rlpml = E1000_READ_REG(hw, E1000_RLPML);
E1000_WRITE_REG(hw, E1000_RLPML, 0);
rctl = E1000_READ_REG(hw, E1000_RCTL);
temp_rctl = rctl & ~(E1000_RCTL_EN | E1000_RCTL_SBP);
temp_rctl |= E1000_RCTL_LPE;
E1000_WRITE_REG(hw, E1000_RCTL, temp_rctl);
E1000_WRITE_REG(hw, E1000_RCTL, temp_rctl | E1000_RCTL_EN);
E1000_WRITE_FLUSH(hw);
msec_delay(2);
/* Enable Rx queues that were previously enabled and restore our
* previous state
*/
for (i = 0; i < 4; i++)
E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl[i]);
E1000_WRITE_REG(hw, E1000_RCTL, rctl);
E1000_WRITE_FLUSH(hw);
E1000_WRITE_REG(hw, E1000_RLPML, rlpml);
E1000_WRITE_REG(hw, E1000_RFCTL, rfctl);
/* Flush receive errors generated by workaround */
E1000_READ_REG(hw, E1000_ROC);
E1000_READ_REG(hw, E1000_RNBC);
E1000_READ_REG(hw, E1000_MPC);
}
/**
* e1000_set_pcie_completion_timeout - set pci-e completion timeout
* @hw: pointer to the HW structure
*
* The defaults for 82575 and 82576 should be in the range of 50us to 50ms,
* however the hardware default for these parts is 500us to 1ms which is less
* than the 10ms recommended by the pci-e spec. To address this we need to
* increase the value to either 10ms to 200ms for capability version 1 config,
* or 16ms to 55ms for version 2.
**/
static s32 e1000_set_pcie_completion_timeout(struct e1000_hw *hw)
{
u32 gcr = E1000_READ_REG(hw, E1000_GCR);
s32 ret_val = E1000_SUCCESS;
u16 pcie_devctl2;
/* only take action if timeout value is defaulted to 0 */
if (gcr & E1000_GCR_CMPL_TMOUT_MASK)
goto out;
/*
* if capababilities version is type 1 we can write the
* timeout of 10ms to 200ms through the GCR register
*/
if (!(gcr & E1000_GCR_CAP_VER2)) {
gcr |= E1000_GCR_CMPL_TMOUT_10ms;
goto out;
}
/*
* for version 2 capabilities we need to write the config space
* directly in order to set the completion timeout value for
* 16ms to 55ms
*/
ret_val = e1000_read_pcie_cap_reg(hw, PCIE_DEVICE_CONTROL2,
&pcie_devctl2);
if (ret_val)
goto out;
pcie_devctl2 |= PCIE_DEVICE_CONTROL2_16ms;
ret_val = e1000_write_pcie_cap_reg(hw, PCIE_DEVICE_CONTROL2,
&pcie_devctl2);
out:
/* disable completion timeout resend */
gcr &= ~E1000_GCR_CMPL_TMOUT_RESEND;
E1000_WRITE_REG(hw, E1000_GCR, gcr);
return ret_val;
}
/**
* e1000_vmdq_set_anti_spoofing_pf - enable or disable anti-spoofing
* @hw: pointer to the hardware struct
* @enable: state to enter, either enabled or disabled
* @pf: Physical Function pool - do not set anti-spoofing for the PF
*
* enables/disables L2 switch anti-spoofing functionality.
**/
void e1000_vmdq_set_anti_spoofing_pf(struct e1000_hw *hw, bool enable, int pf)
{
u32 dtxswc;
switch (hw->mac.type) {
case e1000_82576:
dtxswc = E1000_READ_REG(hw, E1000_DTXSWC);
if (enable) {
dtxswc |= (E1000_DTXSWC_MAC_SPOOF_MASK |
E1000_DTXSWC_VLAN_SPOOF_MASK);
/* The PF can spoof - it has to in order to
* support emulation mode NICs */
dtxswc ^= (1 << pf | 1 << (pf +
E1000_DTXSWC_VLAN_SPOOF_SHIFT));
} else {
dtxswc &= ~(E1000_DTXSWC_MAC_SPOOF_MASK |
E1000_DTXSWC_VLAN_SPOOF_MASK);
}
E1000_WRITE_REG(hw, E1000_DTXSWC, dtxswc);
break;
case e1000_i350:
dtxswc = E1000_READ_REG(hw, E1000_TXSWC);
if (enable) {
dtxswc |= (E1000_DTXSWC_MAC_SPOOF_MASK |
E1000_DTXSWC_VLAN_SPOOF_MASK);
/* The PF can spoof - it has to in order to
* support emulation mode NICs
*/
dtxswc ^= (1 << pf | 1 << (pf +
E1000_DTXSWC_VLAN_SPOOF_SHIFT));
} else {
dtxswc &= ~(E1000_DTXSWC_MAC_SPOOF_MASK |
E1000_DTXSWC_VLAN_SPOOF_MASK);
}
E1000_WRITE_REG(hw, E1000_TXSWC, dtxswc);
default:
break;
}
}
/**
* e1000_vmdq_set_loopback_pf - enable or disable vmdq loopback
* @hw: pointer to the hardware struct
* @enable: state to enter, either enabled or disabled
*
* enables/disables L2 switch loopback functionality.
**/
void e1000_vmdq_set_loopback_pf(struct e1000_hw *hw, bool enable)
{
u32 dtxswc;
switch (hw->mac.type) {
case e1000_82576:
dtxswc = E1000_READ_REG(hw, E1000_DTXSWC);
if (enable)
dtxswc |= E1000_DTXSWC_VMDQ_LOOPBACK_EN;
else
dtxswc &= ~E1000_DTXSWC_VMDQ_LOOPBACK_EN;
E1000_WRITE_REG(hw, E1000_DTXSWC, dtxswc);
break;
case e1000_i350:
dtxswc = E1000_READ_REG(hw, E1000_TXSWC);
if (enable)
dtxswc |= E1000_DTXSWC_VMDQ_LOOPBACK_EN;
else
dtxswc &= ~E1000_DTXSWC_VMDQ_LOOPBACK_EN;
E1000_WRITE_REG(hw, E1000_TXSWC, dtxswc);
break;
default:
/* Currently no other hardware supports loopback */
break;
}
}
/**
* e1000_vmdq_set_replication_pf - enable or disable vmdq replication
* @hw: pointer to the hardware struct
* @enable: state to enter, either enabled or disabled
*
* enables/disables replication of packets across multiple pools.
**/
void e1000_vmdq_set_replication_pf(struct e1000_hw *hw, bool enable)
{
u32 vt_ctl = E1000_READ_REG(hw, E1000_VT_CTL);
if (enable)
vt_ctl |= E1000_VT_CTL_VM_REPL_EN;
else
vt_ctl &= ~E1000_VT_CTL_VM_REPL_EN;
E1000_WRITE_REG(hw, E1000_VT_CTL, vt_ctl);
}
/**
* e1000_read_phy_reg_82580 - Read 82580 MDI control register
* @hw: pointer to the HW structure
* @offset: register offset to be read
* @data: pointer to the read data
*
* Reads the MDI control register in the PHY at offset and stores the
* information read to data.
**/
static s32 e1000_read_phy_reg_82580(struct e1000_hw *hw, u32 offset, u16 *data)
{
s32 ret_val;
DEBUGFUNC("e1000_read_phy_reg_82580");
ret_val = hw->phy.ops.acquire(hw);
if (ret_val)
goto out;
ret_val = e1000_read_phy_reg_mdic(hw, offset, data);
hw->phy.ops.release(hw);
out:
return ret_val;
}
/**
* e1000_write_phy_reg_82580 - Write 82580 MDI control register
* @hw: pointer to the HW structure
* @offset: register offset to write to
* @data: data to write to register at offset
*
* Writes data to MDI control register in the PHY at offset.
**/
static s32 e1000_write_phy_reg_82580(struct e1000_hw *hw, u32 offset, u16 data)
{
s32 ret_val;
DEBUGFUNC("e1000_write_phy_reg_82580");
ret_val = hw->phy.ops.acquire(hw);
if (ret_val)
goto out;
ret_val = e1000_write_phy_reg_mdic(hw, offset, data);
hw->phy.ops.release(hw);
out:
return ret_val;
}
/**
* e1000_reset_mdicnfg_82580 - Reset MDICNFG destination and com_mdio bits
* @hw: pointer to the HW structure
*
* This resets the the MDICNFG.Destination and MDICNFG.Com_MDIO bits based on
* the values found in the EEPROM. This addresses an issue in which these
* bits are not restored from EEPROM after reset.
**/
static s32 e1000_reset_mdicnfg_82580(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
u32 mdicnfg;
u16 nvm_data = 0;
DEBUGFUNC("e1000_reset_mdicnfg_82580");
if (hw->mac.type != e1000_82580)
goto out;
if (!e1000_sgmii_active_82575(hw))
goto out;
ret_val = hw->nvm.ops.read(hw, NVM_INIT_CONTROL3_PORT_A +
NVM_82580_LAN_FUNC_OFFSET(hw->bus.func), 1,
&nvm_data);
if (ret_val) {
DEBUGOUT("NVM Read Error\n");
goto out;
}
mdicnfg = E1000_READ_REG(hw, E1000_MDICNFG);
if (nvm_data & NVM_WORD24_EXT_MDIO)
mdicnfg |= E1000_MDICNFG_EXT_MDIO;
if (nvm_data & NVM_WORD24_COM_MDIO)
mdicnfg |= E1000_MDICNFG_COM_MDIO;
E1000_WRITE_REG(hw, E1000_MDICNFG, mdicnfg);
out:
return ret_val;
}
/**
* e1000_reset_hw_82580 - Reset hardware
* @hw: pointer to the HW structure
*
* This resets function or entire device (all ports, etc.)
* to a known state.
**/
static s32 e1000_reset_hw_82580(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
/* BH SW mailbox bit in SW_FW_SYNC */
u16 swmbsw_mask = E1000_SW_SYNCH_MB;
u32 ctrl;
bool global_device_reset = hw->dev_spec._82575.global_device_reset;
DEBUGFUNC("e1000_reset_hw_82580");
hw->dev_spec._82575.global_device_reset = FALSE;
/* Get current control state. */
ctrl = E1000_READ_REG(hw, E1000_CTRL);
/*
* 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 = e1000_disable_pcie_master_generic(hw);
if (ret_val)
DEBUGOUT("PCI-E Master disable polling has failed.\n");
DEBUGOUT("Masking off all interrupts\n");
E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
E1000_WRITE_REG(hw, E1000_RCTL, 0);
E1000_WRITE_REG(hw, E1000_TCTL, E1000_TCTL_PSP);
E1000_WRITE_FLUSH(hw);
msec_delay(10);
/* Determine whether or not a global dev reset is requested */
if (global_device_reset && hw->mac.ops.acquire_swfw_sync(hw,
swmbsw_mask))
global_device_reset = FALSE;
if (global_device_reset && !(E1000_READ_REG(hw, E1000_STATUS) &
E1000_STAT_DEV_RST_SET))
ctrl |= E1000_CTRL_DEV_RST;
else
ctrl |= E1000_CTRL_RST;
E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
E1000_WRITE_FLUSH(hw);
/* Add delay to insure DEV_RST has time to complete */
if (global_device_reset)
msec_delay(5);
ret_val = e1000_get_auto_rd_done_generic(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.
*/
DEBUGOUT("Auto Read Done did not complete\n");
}
/* If EEPROM is not present, run manual init scripts */
if (!(E1000_READ_REG(hw, E1000_EECD) & E1000_EECD_PRES))
e1000_reset_init_script_82575(hw);
/* clear global device reset status bit */
E1000_WRITE_REG(hw, E1000_STATUS, E1000_STAT_DEV_RST_SET);
/* Clear any pending interrupt events. */
E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
E1000_READ_REG(hw, E1000_ICR);
ret_val = e1000_reset_mdicnfg_82580(hw);
if (ret_val)
DEBUGOUT("Could not reset MDICNFG based on EEPROM\n");
/* Install any alternate MAC address into RAR0 */
ret_val = e1000_check_alt_mac_addr_generic(hw);
/* Release semaphore */
if (global_device_reset)
hw->mac.ops.release_swfw_sync(hw, swmbsw_mask);
return ret_val;
}
/**
* e1000_rxpbs_adjust_82580 - adjust RXPBS value to reflect actual Rx PBA size
* @data: data received by reading RXPBS register
*
* The 82580 uses a table based approach for packet buffer allocation sizes.
* This function converts the retrieved value into the correct table value
* 0x0 0x1 0x2 0x3 0x4 0x5 0x6 0x7
* 0x0 36 72 144 1 2 4 8 16
* 0x8 35 70 140 rsv rsv rsv rsv rsv
*/
u16 e1000_rxpbs_adjust_82580(u32 data)
{
u16 ret_val = 0;
if (data < E1000_82580_RXPBS_TABLE_SIZE)
ret_val = e1000_82580_rxpbs_table[data];
return ret_val;
}
/**
* e1000_validate_nvm_checksum_with_offset - Validate EEPROM
* checksum
* @hw: pointer to the HW structure
* @offset: offset in words of the checksum protected region
*
* Calculates the EEPROM checksum by reading/adding each word of the EEPROM
* and then verifies that the sum of the EEPROM is equal to 0xBABA.
**/
s32 e1000_validate_nvm_checksum_with_offset(struct e1000_hw *hw, u16 offset)
{
s32 ret_val = E1000_SUCCESS;
u16 checksum = 0;
u16 i, nvm_data;
DEBUGFUNC("e1000_validate_nvm_checksum_with_offset");
for (i = offset; i < ((NVM_CHECKSUM_REG + offset) + 1); i++) {
ret_val = hw->nvm.ops.read(hw, i, 1, &nvm_data);
if (ret_val) {
DEBUGOUT("NVM Read Error\n");
goto out;
}
checksum += nvm_data;
}
if (checksum != (u16) NVM_SUM) {
DEBUGOUT("NVM Checksum Invalid\n");
ret_val = -E1000_ERR_NVM;
goto out;
}
out:
return ret_val;
}
/**
* e1000_update_nvm_checksum_with_offset - Update EEPROM
* checksum
* @hw: pointer to the HW structure
* @offset: offset in words of the checksum protected region
*
* Updates the EEPROM checksum by reading/adding each word of the EEPROM
* up to the checksum. Then calculates the EEPROM checksum and writes the
* value to the EEPROM.
**/
s32 e1000_update_nvm_checksum_with_offset(struct e1000_hw *hw, u16 offset)
{
s32 ret_val;
u16 checksum = 0;
u16 i, nvm_data;
DEBUGFUNC("e1000_update_nvm_checksum_with_offset");
for (i = offset; i < (NVM_CHECKSUM_REG + offset); i++) {
ret_val = hw->nvm.ops.read(hw, i, 1, &nvm_data);
if (ret_val) {
DEBUGOUT("NVM Read Error while updating checksum.\n");
goto out;
}
checksum += nvm_data;
}
checksum = (u16) NVM_SUM - checksum;
ret_val = hw->nvm.ops.write(hw, (NVM_CHECKSUM_REG + offset), 1,
&checksum);
if (ret_val)
DEBUGOUT("NVM Write Error while updating checksum.\n");
out:
return ret_val;
}
/**
* e1000_validate_nvm_checksum_82580 - Validate EEPROM checksum
* @hw: pointer to the HW structure
*
* Calculates the EEPROM section checksum by reading/adding each word of
* the EEPROM and then verifies that the sum of the EEPROM is
* equal to 0xBABA.
**/
static s32 e1000_validate_nvm_checksum_82580(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
u16 eeprom_regions_count = 1;
u16 j, nvm_data;
u16 nvm_offset;
DEBUGFUNC("e1000_validate_nvm_checksum_82580");
ret_val = hw->nvm.ops.read(hw, NVM_COMPATIBILITY_REG_3, 1, &nvm_data);
if (ret_val) {
DEBUGOUT("NVM Read Error\n");
goto out;
}
if (nvm_data & NVM_COMPATIBILITY_BIT_MASK) {
/* if chekcsums compatibility bit is set validate checksums
* for all 4 ports. */
eeprom_regions_count = 4;
}
for (j = 0; j < eeprom_regions_count; j++) {
nvm_offset = NVM_82580_LAN_FUNC_OFFSET(j);
ret_val = e1000_validate_nvm_checksum_with_offset(hw,
nvm_offset);
if (ret_val != E1000_SUCCESS)
goto out;
}
out:
return ret_val;
}
/**
* e1000_update_nvm_checksum_82580 - Update EEPROM checksum
* @hw: pointer to the HW structure
*
* Updates the EEPROM section checksums for all 4 ports by reading/adding
* each word of the EEPROM up to the checksum. Then calculates the EEPROM
* checksum and writes the value to the EEPROM.
**/
static s32 e1000_update_nvm_checksum_82580(struct e1000_hw *hw)
{
s32 ret_val;
u16 j, nvm_data;
u16 nvm_offset;
DEBUGFUNC("e1000_update_nvm_checksum_82580");
ret_val = hw->nvm.ops.read(hw, NVM_COMPATIBILITY_REG_3, 1, &nvm_data);
if (ret_val) {
DEBUGOUT("NVM Read Error while updating checksum compatibility bit.\n");
goto out;
}
if (!(nvm_data & NVM_COMPATIBILITY_BIT_MASK)) {
/* set compatibility bit to validate checksums appropriately */
nvm_data = nvm_data | NVM_COMPATIBILITY_BIT_MASK;
ret_val = hw->nvm.ops.write(hw, NVM_COMPATIBILITY_REG_3, 1,
&nvm_data);
if (ret_val) {
DEBUGOUT("NVM Write Error while updating checksum compatibility bit.\n");
goto out;
}
}
for (j = 0; j < 4; j++) {
nvm_offset = NVM_82580_LAN_FUNC_OFFSET(j);
ret_val = e1000_update_nvm_checksum_with_offset(hw, nvm_offset);
if (ret_val)
goto out;
}
out:
return ret_val;
}
/**
* e1000_validate_nvm_checksum_i350 - Validate EEPROM checksum
* @hw: pointer to the HW structure
*
* Calculates the EEPROM section checksum by reading/adding each word of
* the EEPROM and then verifies that the sum of the EEPROM is
* equal to 0xBABA.
**/
static s32 e1000_validate_nvm_checksum_i350(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
u16 j;
u16 nvm_offset;
DEBUGFUNC("e1000_validate_nvm_checksum_i350");
for (j = 0; j < 4; j++) {
nvm_offset = NVM_82580_LAN_FUNC_OFFSET(j);
ret_val = e1000_validate_nvm_checksum_with_offset(hw,
nvm_offset);
if (ret_val != E1000_SUCCESS)
goto out;
}
out:
return ret_val;
}
/**
* e1000_update_nvm_checksum_i350 - Update EEPROM checksum
* @hw: pointer to the HW structure
*
* Updates the EEPROM section checksums for all 4 ports by reading/adding
* each word of the EEPROM up to the checksum. Then calculates the EEPROM
* checksum and writes the value to the EEPROM.
**/
static s32 e1000_update_nvm_checksum_i350(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
u16 j;
u16 nvm_offset;
DEBUGFUNC("e1000_update_nvm_checksum_i350");
for (j = 0; j < 4; j++) {
nvm_offset = NVM_82580_LAN_FUNC_OFFSET(j);
ret_val = e1000_update_nvm_checksum_with_offset(hw, nvm_offset);
if (ret_val != E1000_SUCCESS)
goto out;
}
out:
return ret_val;
}
/**
* e1000_set_eee_i350 - Enable/disable EEE support
* @hw: pointer to the HW structure
*
* Enable/disable EEE based on setting in dev_spec structure.
*
**/
s32 e1000_set_eee_i350(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
u32 ipcnfg, eeer;
DEBUGFUNC("e1000_set_eee_i350");
if ((hw->mac.type < e1000_i350) ||
(hw->phy.media_type != e1000_media_type_copper))
goto out;
ipcnfg = E1000_READ_REG(hw, E1000_IPCNFG);
eeer = E1000_READ_REG(hw, E1000_EEER);
/* enable or disable per user setting */
if (!(hw->dev_spec._82575.eee_disable)) {
ipcnfg |= (E1000_IPCNFG_EEE_1G_AN | E1000_IPCNFG_EEE_100M_AN);
eeer |= (E1000_EEER_TX_LPI_EN | E1000_EEER_RX_LPI_EN |
E1000_EEER_LPI_FC);
} else {
ipcnfg &= ~(E1000_IPCNFG_EEE_1G_AN | E1000_IPCNFG_EEE_100M_AN);
eeer &= ~(E1000_EEER_TX_LPI_EN | E1000_EEER_RX_LPI_EN |
E1000_EEER_LPI_FC);
}
E1000_WRITE_REG(hw, E1000_IPCNFG, ipcnfg);
E1000_WRITE_REG(hw, E1000_EEER, eeer);
E1000_READ_REG(hw, E1000_IPCNFG);
E1000_READ_REG(hw, E1000_EEER);
out:
return ret_val;
}
/* Due to a hw errata, if the host tries to configure the VFTA register
* while performing queries from the BMC or DMA, then the VFTA in some
* cases won't be written.
*/
/**
* e1000_clear_vfta_i350 - Clear VLAN filter table
* @hw: pointer to the HW structure
*
* Clears the register array which contains the VLAN filter table by
* setting all the values to 0.
**/
void e1000_clear_vfta_i350(struct e1000_hw *hw)
{
u32 offset;
int i;
DEBUGFUNC("e1000_clear_vfta_350");
for (offset = 0; offset < E1000_VLAN_FILTER_TBL_SIZE; offset++) {
for (i = 0; i < 10; i++)
E1000_WRITE_REG_ARRAY(hw, E1000_VFTA, offset, 0);
E1000_WRITE_FLUSH(hw);
}
}
/**
* e1000_write_vfta_i350 - Write value to VLAN filter table
* @hw: pointer to the HW structure
* @offset: register offset in VLAN filter table
* @value: register value written to VLAN filter table
*
* Writes value at the given offset in the register array which stores
* the VLAN filter table.
**/
void e1000_write_vfta_i350(struct e1000_hw *hw, u32 offset, u32 value)
{
int i;
DEBUGFUNC("e1000_write_vfta_350");
for (i = 0; i < 10; i++)
E1000_WRITE_REG_ARRAY(hw, E1000_VFTA, offset, value);
E1000_WRITE_FLUSH(hw);
}
/**
* e1000_set_i2c_bb - Enable I2C bit-bang
* @hw: pointer to the HW structure
*
* Enable I2C bit-bang interface
*
**/
s32 e1000_set_i2c_bb(struct e1000_hw *hw)
{
s32 ret_val = E1000_SUCCESS;
u32 ctrl_ext, i2cparams;
DEBUGFUNC("e1000_set_i2c_bb");
ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
ctrl_ext |= E1000_CTRL_I2C_ENA;
E1000_WRITE_REG(hw, E1000_CTRL_EXT, ctrl_ext);
E1000_WRITE_FLUSH(hw);
i2cparams = E1000_READ_REG(hw, E1000_I2CPARAMS);
i2cparams |= E1000_I2CBB_EN;
i2cparams |= E1000_I2C_DATA_OE_N;
i2cparams |= E1000_I2C_CLK_OE_N;
E1000_WRITE_REG(hw, E1000_I2CPARAMS, i2cparams);
E1000_WRITE_FLUSH(hw);
return ret_val;
}
/**
* e1000_read_i2c_byte_generic - Reads 8 bit word over I2C
* @hw: pointer to hardware structure
* @byte_offset: byte offset to read
* @dev_addr: device address
* @data: value read
*
* Performs byte read operation over I2C interface at
* a specified device address.
**/
s32 e1000_read_i2c_byte_generic(struct e1000_hw *hw, u8 byte_offset,
u8 dev_addr, u8 *data)
{
s32 status = E1000_SUCCESS;
u32 max_retry = 10;
u32 retry = 1;
u16 swfw_mask = 0;
bool nack = TRUE;
DEBUGFUNC("e1000_read_i2c_byte_generic");
swfw_mask = E1000_SWFW_PHY0_SM;
do {
if (hw->mac.ops.acquire_swfw_sync(hw, swfw_mask)
!= E1000_SUCCESS) {
status = E1000_ERR_SWFW_SYNC;
goto read_byte_out;
}
e1000_i2c_start(hw);
/* Device Address and write indication */
status = e1000_clock_out_i2c_byte(hw, dev_addr);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_get_i2c_ack(hw);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_clock_out_i2c_byte(hw, byte_offset);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_get_i2c_ack(hw);
if (status != E1000_SUCCESS)
goto fail;
e1000_i2c_start(hw);
/* Device Address and read indication */
status = e1000_clock_out_i2c_byte(hw, (dev_addr | 0x1));
if (status != E1000_SUCCESS)
goto fail;
status = e1000_get_i2c_ack(hw);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_clock_in_i2c_byte(hw, data);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_clock_out_i2c_bit(hw, nack);
if (status != E1000_SUCCESS)
goto fail;
e1000_i2c_stop(hw);
break;
fail:
hw->mac.ops.release_swfw_sync(hw, swfw_mask);
msec_delay(100);
e1000_i2c_bus_clear(hw);
retry++;
if (retry < max_retry)
DEBUGOUT("I2C byte read error - Retrying.\n");
else
DEBUGOUT("I2C byte read error.\n");
} while (retry < max_retry);
hw->mac.ops.release_swfw_sync(hw, swfw_mask);
read_byte_out:
return status;
}
/**
* e1000_write_i2c_byte_generic - Writes 8 bit word over I2C
* @hw: pointer to hardware structure
* @byte_offset: byte offset to write
* @dev_addr: device address
* @data: value to write
*
* Performs byte write operation over I2C interface at
* a specified device address.
**/
s32 e1000_write_i2c_byte_generic(struct e1000_hw *hw, u8 byte_offset,
u8 dev_addr, u8 data)
{
s32 status = E1000_SUCCESS;
u32 max_retry = 1;
u32 retry = 0;
u16 swfw_mask = 0;
DEBUGFUNC("e1000_write_i2c_byte_generic");
swfw_mask = E1000_SWFW_PHY0_SM;
if (hw->mac.ops.acquire_swfw_sync(hw, swfw_mask) != E1000_SUCCESS) {
status = E1000_ERR_SWFW_SYNC;
goto write_byte_out;
}
do {
e1000_i2c_start(hw);
status = e1000_clock_out_i2c_byte(hw, dev_addr);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_get_i2c_ack(hw);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_clock_out_i2c_byte(hw, byte_offset);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_get_i2c_ack(hw);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_clock_out_i2c_byte(hw, data);
if (status != E1000_SUCCESS)
goto fail;
status = e1000_get_i2c_ack(hw);
if (status != E1000_SUCCESS)
goto fail;
e1000_i2c_stop(hw);
break;
fail:
e1000_i2c_bus_clear(hw);
retry++;
if (retry < max_retry)
DEBUGOUT("I2C byte write error - Retrying.\n");
else
DEBUGOUT("I2C byte write error.\n");
} while (retry < max_retry);
hw->mac.ops.release_swfw_sync(hw, swfw_mask);
write_byte_out:
return status;
}
/**
* e1000_i2c_start - Sets I2C start condition
* @hw: pointer to hardware structure
*
* Sets I2C start condition (High -> Low on SDA while SCL is High)
**/
static void e1000_i2c_start(struct e1000_hw *hw)
{
u32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
DEBUGFUNC("e1000_i2c_start");
/* Start condition must begin with data and clock high */
e1000_set_i2c_data(hw, &i2cctl, 1);
e1000_raise_i2c_clk(hw, &i2cctl);
/* Setup time for start condition (4.7us) */
usec_delay(E1000_I2C_T_SU_STA);
e1000_set_i2c_data(hw, &i2cctl, 0);
/* Hold time for start condition (4us) */
usec_delay(E1000_I2C_T_HD_STA);
e1000_lower_i2c_clk(hw, &i2cctl);
/* Minimum low period of clock is 4.7 us */
usec_delay(E1000_I2C_T_LOW);
}
/**
* e1000_i2c_stop - Sets I2C stop condition
* @hw: pointer to hardware structure
*
* Sets I2C stop condition (Low -> High on SDA while SCL is High)
**/
static void e1000_i2c_stop(struct e1000_hw *hw)
{
u32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
DEBUGFUNC("e1000_i2c_stop");
/* Stop condition must begin with data low and clock high */
e1000_set_i2c_data(hw, &i2cctl, 0);
e1000_raise_i2c_clk(hw, &i2cctl);
/* Setup time for stop condition (4us) */
usec_delay(E1000_I2C_T_SU_STO);
e1000_set_i2c_data(hw, &i2cctl, 1);
/* bus free time between stop and start (4.7us)*/
usec_delay(E1000_I2C_T_BUF);
}
/**
* e1000_clock_in_i2c_byte - Clocks in one byte via I2C
* @hw: pointer to hardware structure
* @data: data byte to clock in
*
* Clocks in one byte data via I2C data/clock
**/
static s32 e1000_clock_in_i2c_byte(struct e1000_hw *hw, u8 *data)
{
s32 i;
bool bit = 0;
DEBUGFUNC("e1000_clock_in_i2c_byte");
*data = 0;
for (i = 7; i >= 0; i--) {
e1000_clock_in_i2c_bit(hw, &bit);
*data |= bit << i;
}
return E1000_SUCCESS;
}
/**
* e1000_clock_out_i2c_byte - Clocks out one byte via I2C
* @hw: pointer to hardware structure
* @data: data byte clocked out
*
* Clocks out one byte data via I2C data/clock
**/
static s32 e1000_clock_out_i2c_byte(struct e1000_hw *hw, u8 data)
{
s32 status = E1000_SUCCESS;
s32 i;
u32 i2cctl;
bool bit = 0;
DEBUGFUNC("e1000_clock_out_i2c_byte");
for (i = 7; i >= 0; i--) {
bit = (data >> i) & 0x1;
status = e1000_clock_out_i2c_bit(hw, bit);
if (status != E1000_SUCCESS)
break;
}
/* Release SDA line (set high) */
i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
i2cctl |= E1000_I2C_DATA_OE_N;
E1000_WRITE_REG(hw, E1000_I2CPARAMS, i2cctl);
E1000_WRITE_FLUSH(hw);
return status;
}
/**
* e1000_get_i2c_ack - Polls for I2C ACK
* @hw: pointer to hardware structure
*
* Clocks in/out one bit via I2C data/clock
**/
static s32 e1000_get_i2c_ack(struct e1000_hw *hw)
{
s32 status = E1000_SUCCESS;
u32 i = 0;
u32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
u32 timeout = 10;
bool ack = TRUE;
DEBUGFUNC("e1000_get_i2c_ack");
e1000_raise_i2c_clk(hw, &i2cctl);
/* Minimum high period of clock is 4us */
usec_delay(E1000_I2C_T_HIGH);
/* Wait until SCL returns high */
for (i = 0; i < timeout; i++) {
usec_delay(1);
i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
if (i2cctl & E1000_I2C_CLK_IN)
break;
}
if (!(i2cctl & E1000_I2C_CLK_IN))
return E1000_ERR_I2C;
ack = e1000_get_i2c_data(&i2cctl);
if (ack) {
DEBUGOUT("I2C ack was not received.\n");
status = E1000_ERR_I2C;
}
e1000_lower_i2c_clk(hw, &i2cctl);
/* Minimum low period of clock is 4.7 us */
usec_delay(E1000_I2C_T_LOW);
return status;
}
/**
* e1000_clock_in_i2c_bit - Clocks in one bit via I2C data/clock
* @hw: pointer to hardware structure
* @data: read data value
*
* Clocks in one bit via I2C data/clock
**/
static s32 e1000_clock_in_i2c_bit(struct e1000_hw *hw, bool *data)
{
u32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
DEBUGFUNC("e1000_clock_in_i2c_bit");
e1000_raise_i2c_clk(hw, &i2cctl);
/* Minimum high period of clock is 4us */
usec_delay(E1000_I2C_T_HIGH);
i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
*data = e1000_get_i2c_data(&i2cctl);
e1000_lower_i2c_clk(hw, &i2cctl);
/* Minimum low period of clock is 4.7 us */
usec_delay(E1000_I2C_T_LOW);
return E1000_SUCCESS;
}
/**
* e1000_clock_out_i2c_bit - Clocks in/out one bit via I2C data/clock
* @hw: pointer to hardware structure
* @data: data value to write
*
* Clocks out one bit via I2C data/clock
**/
static s32 e1000_clock_out_i2c_bit(struct e1000_hw *hw, bool data)
{
s32 status;
u32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
DEBUGFUNC("e1000_clock_out_i2c_bit");
status = e1000_set_i2c_data(hw, &i2cctl, data);
if (status == E1000_SUCCESS) {
e1000_raise_i2c_clk(hw, &i2cctl);
/* Minimum high period of clock is 4us */
usec_delay(E1000_I2C_T_HIGH);
e1000_lower_i2c_clk(hw, &i2cctl);
/* Minimum low period of clock is 4.7 us.
* This also takes care of the data hold time.
*/
usec_delay(E1000_I2C_T_LOW);
} else {
status = E1000_ERR_I2C;
DEBUGOUT1("I2C data was not set to %X\n", data);
}
return status;
}
/**
* e1000_raise_i2c_clk - Raises the I2C SCL clock
* @hw: pointer to hardware structure
* @i2cctl: Current value of I2CCTL register
*
* Raises the I2C clock line '0'->'1'
**/
static void e1000_raise_i2c_clk(struct e1000_hw *hw, u32 *i2cctl)
{
DEBUGFUNC("e1000_raise_i2c_clk");
*i2cctl |= E1000_I2C_CLK_OUT;
*i2cctl &= ~E1000_I2C_CLK_OE_N;
E1000_WRITE_REG(hw, E1000_I2CPARAMS, *i2cctl);
E1000_WRITE_FLUSH(hw);
/* SCL rise time (1000ns) */
usec_delay(E1000_I2C_T_RISE);
}
/**
* e1000_lower_i2c_clk - Lowers the I2C SCL clock
* @hw: pointer to hardware structure
* @i2cctl: Current value of I2CCTL register
*
* Lowers the I2C clock line '1'->'0'
**/
static void e1000_lower_i2c_clk(struct e1000_hw *hw, u32 *i2cctl)
{
DEBUGFUNC("e1000_lower_i2c_clk");
*i2cctl &= ~E1000_I2C_CLK_OUT;
*i2cctl &= ~E1000_I2C_CLK_OE_N;
E1000_WRITE_REG(hw, E1000_I2CPARAMS, *i2cctl);
E1000_WRITE_FLUSH(hw);
/* SCL fall time (300ns) */
usec_delay(E1000_I2C_T_FALL);
}
/**
* e1000_set_i2c_data - Sets the I2C data bit
* @hw: pointer to hardware structure
* @i2cctl: Current value of I2CCTL register
* @data: I2C data value (0 or 1) to set
*
* Sets the I2C data bit
**/
static s32 e1000_set_i2c_data(struct e1000_hw *hw, u32 *i2cctl, bool data)
{
s32 status = E1000_SUCCESS;
DEBUGFUNC("e1000_set_i2c_data");
if (data)
*i2cctl |= E1000_I2C_DATA_OUT;
else
*i2cctl &= ~E1000_I2C_DATA_OUT;
*i2cctl &= ~E1000_I2C_DATA_OE_N;
*i2cctl |= E1000_I2C_CLK_OE_N;
E1000_WRITE_REG(hw, E1000_I2CPARAMS, *i2cctl);
E1000_WRITE_FLUSH(hw);
/* Data rise/fall (1000ns/300ns) and set-up time (250ns) */
usec_delay(E1000_I2C_T_RISE + E1000_I2C_T_FALL + E1000_I2C_T_SU_DATA);
*i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
if (data != e1000_get_i2c_data(i2cctl)) {
status = E1000_ERR_I2C;
DEBUGOUT1("Error - I2C data was not set to %X.\n", data);
}
return status;
}
/**
* e1000_get_i2c_data - Reads the I2C SDA data bit
* @hw: pointer to hardware structure
* @i2cctl: Current value of I2CCTL register
*
* Returns the I2C data bit value
**/
static bool e1000_get_i2c_data(u32 *i2cctl)
{
bool data;
DEBUGFUNC("e1000_get_i2c_data");
if (*i2cctl & E1000_I2C_DATA_IN)
data = 1;
else
data = 0;
return data;
}
/**
* e1000_i2c_bus_clear - Clears the I2C bus
* @hw: pointer to hardware structure
*
* Clears the I2C bus by sending nine clock pulses.
* Used when data line is stuck low.
**/
void e1000_i2c_bus_clear(struct e1000_hw *hw)
{
u32 i2cctl = E1000_READ_REG(hw, E1000_I2CPARAMS);
u32 i;
DEBUGFUNC("e1000_i2c_bus_clear");
e1000_i2c_start(hw);
e1000_set_i2c_data(hw, &i2cctl, 1);
for (i = 0; i < 9; i++) {
e1000_raise_i2c_clk(hw, &i2cctl);
/* Min high period of clock is 4us */
usec_delay(E1000_I2C_T_HIGH);
e1000_lower_i2c_clk(hw, &i2cctl);
/* Min low period of clock is 4.7us*/
usec_delay(E1000_I2C_T_LOW);
}
e1000_i2c_start(hw);
/* Put the i2c bus back to default state */
e1000_i2c_stop(hw);
}