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Diffstat (limited to 'usr/src/uts/common/io/ixgbe/ixgbe_phy.c')
-rw-r--r--usr/src/uts/common/io/ixgbe/ixgbe_phy.c778
1 files changed, 754 insertions, 24 deletions
diff --git a/usr/src/uts/common/io/ixgbe/ixgbe_phy.c b/usr/src/uts/common/io/ixgbe/ixgbe_phy.c
index 205eb299b9..56e9ffaf1a 100644
--- a/usr/src/uts/common/io/ixgbe/ixgbe_phy.c
+++ b/usr/src/uts/common/io/ixgbe/ixgbe_phy.c
@@ -1,7 +1,7 @@
/*
* CDDL HEADER START
*
- * Copyright(c) 2007-2008 Intel Corporation. All rights reserved.
+ * Copyright(c) 2007-2009 Intel Corporation. All rights reserved.
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
@@ -23,15 +23,27 @@
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms of the CDDL.
+ * Use is subject to license terms.
*/
-/* IntelVersion: 1.60 v2008-09-12 */
+/* IntelVersion: 1.83 v2-7-8_2009-4-7 */
#include "ixgbe_api.h"
#include "ixgbe_common.h"
#include "ixgbe_phy.h"
-#ident "$Id: ixgbe_phy.c,v 1.60 2008/09/15 15:47:02 mrchilak Exp $"
+
+static void ixgbe_i2c_start(struct ixgbe_hw *hw);
+static void ixgbe_i2c_stop(struct ixgbe_hw *hw);
+static s32 ixgbe_clock_in_i2c_byte(struct ixgbe_hw *hw, u8 *data);
+static s32 ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data);
+static s32 ixgbe_get_i2c_ack(struct ixgbe_hw *hw);
+static s32 ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data);
+static s32 ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data);
+static s32 ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
+static void ixgbe_lower_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl);
+static s32 ixgbe_set_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl, bool data);
+static bool ixgbe_get_i2c_data(u32 *i2cctl);
+void ixgbe_i2c_bus_clear(struct ixgbe_hw *hw);
/*
* ixgbe_init_phy_ops_generic - Inits PHY function ptrs
@@ -53,6 +65,11 @@ ixgbe_init_phy_ops_generic(struct ixgbe_hw *hw)
phy->ops.setup_link_speed = &ixgbe_setup_phy_link_speed_generic;
phy->ops.check_link = NULL;
phy->ops.get_firmware_version = NULL;
+ phy->ops.read_i2c_byte = &ixgbe_read_i2c_byte_generic;
+ phy->ops.write_i2c_byte = &ixgbe_write_i2c_byte_generic;
+ phy->ops.read_i2c_eeprom = &ixgbe_read_i2c_eeprom_generic;
+ phy->ops.write_i2c_eeprom = &ixgbe_write_i2c_eeprom_generic;
+ phy->ops.i2c_bus_clear = &ixgbe_i2c_bus_clear;
phy->ops.identify_sfp = &ixgbe_identify_sfp_module_generic;
phy->sfp_type = ixgbe_sfp_type_unknown;
@@ -70,6 +87,7 @@ ixgbe_identify_phy_generic(struct ixgbe_hw *hw)
{
s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
u32 phy_addr;
+ u16 ext_ability = 0;
if (hw->phy.type == ixgbe_phy_unknown) {
for (phy_addr = 0; phy_addr < IXGBE_MAX_PHY_ADDR; phy_addr++) {
@@ -78,10 +96,29 @@ ixgbe_identify_phy_generic(struct ixgbe_hw *hw)
(void) ixgbe_get_phy_id(hw);
hw->phy.type =
ixgbe_get_phy_type_from_id(hw->phy.id);
+
+ if (hw->phy.type == ixgbe_phy_unknown) {
+ hw->phy.ops.read_reg(hw,
+ IXGBE_MDIO_PHY_EXT_ABILITY,
+ IXGBE_MDIO_PMA_PMD_DEV_TYPE,
+ &ext_ability);
+ if (ext_ability &
+ IXGBE_MDIO_PHY_10GBASET_ABILITY ||
+ ext_ability &
+ IXGBE_MDIO_PHY_1000BASET_ABILITY)
+ hw->phy.type =
+ ixgbe_phy_cu_unknown;
+ else
+ hw->phy.type =
+ ixgbe_phy_generic;
+ }
+
status = IXGBE_SUCCESS;
break;
}
}
+ if (status != IXGBE_SUCCESS)
+ hw->phy.addr = 0;
} else {
status = IXGBE_SUCCESS;
}
@@ -175,13 +212,40 @@ ixgbe_get_phy_type_from_id(u32 phy_id)
s32
ixgbe_reset_phy_generic(struct ixgbe_hw *hw)
{
+ u32 i;
+ u16 ctrl = 0;
+ s32 status = IXGBE_SUCCESS;
+
+ if (hw->phy.type == ixgbe_phy_unknown)
+ status = ixgbe_identify_phy_generic(hw);
+
+ if (status != IXGBE_SUCCESS || hw->phy.type == ixgbe_phy_none)
+ goto out;
+
/*
* Perform soft PHY reset to the PHY_XS.
* This will cause a soft reset to the PHY
*/
- return hw->phy.ops.write_reg(hw, IXGBE_MDIO_PHY_XS_CONTROL,
+ hw->phy.ops.write_reg(hw, IXGBE_MDIO_PHY_XS_CONTROL,
IXGBE_MDIO_PHY_XS_DEV_TYPE,
IXGBE_MDIO_PHY_XS_RESET);
+
+ /* Poll for reset bit to self-clear indicating reset is complete */
+ for (i = 0; i < 500; i++) {
+ msec_delay(1);
+ hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_XS_CONTROL,
+ IXGBE_MDIO_PHY_XS_DEV_TYPE, &ctrl);
+ if (!(ctrl & IXGBE_MDIO_PHY_XS_RESET))
+ break;
+ }
+
+ if (ctrl & IXGBE_MDIO_PHY_XS_RESET) {
+ status = IXGBE_ERR_RESET_FAILED;
+ DEBUGOUT("PHY reset polling failed to complete.\n");
+ }
+
+out:
+ return (status);
}
/*
@@ -472,6 +536,36 @@ s32 ixgbe_setup_phy_link_speed_generic(struct ixgbe_hw *hw,
}
/*
+ * ixgbe_get_copper_link_capabilities_generic - Determines link capabilities
+ * @hw: pointer to hardware structure
+ * @speed: pointer to link speed
+ * @autoneg: boolean auto-negotiation value
+ *
+ * Determines the link capabilities by reading the AUTOC register.
+ */
+s32 ixgbe_get_copper_link_capabilities_generic(struct ixgbe_hw *hw,
+ ixgbe_link_speed *speed, bool *autoneg)
+{
+ s32 status = IXGBE_ERR_LINK_SETUP;
+ u16 speed_ability;
+
+ *speed = 0;
+ *autoneg = true;
+
+ status = hw->phy.ops.read_reg(hw, IXGBE_MDIO_PHY_SPEED_ABILITY,
+ IXGBE_MDIO_PMA_PMD_DEV_TYPE, &speed_ability);
+
+ if (status == IXGBE_SUCCESS) {
+ if (speed_ability & IXGBE_MDIO_PHY_SPEED_10G)
+ *speed |= IXGBE_LINK_SPEED_10GB_FULL;
+ if (speed_ability & IXGBE_MDIO_PHY_SPEED_1G)
+ *speed |= IXGBE_LINK_SPEED_1GB_FULL;
+ }
+
+ return (status);
+}
+
+/*
* ixgbe_check_phy_link_tnx - Determine link and speed status
* @hw: pointer to hardware structure
*
@@ -634,31 +728,40 @@ out:
}
/*
- * ixgbe_identify_sfp_module_generic - Identifies SFP module and assigns
- * the PHY type.
+ * ixgbe_identify_sfp_module_generic - Identifies SFP module
* @hw: pointer to hardware structure
*
- * Searches for and identifies the SFP module. Assigns appropriate PHY type.
+ * Searches for and identifies the SFP module and assigns appropriate PHY type.
*/
s32
ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw)
{
s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
u32 vendor_oui = 0;
+ enum ixgbe_sfp_type stored_sfp_type = hw->phy.sfp_type;
u8 identifier = 0;
u8 comp_codes_1g = 0;
u8 comp_codes_10g = 0;
- u8 oui_bytes[4] = {0, 0, 0, 0};
+ u8 oui_bytes[3] = {0, 0, 0};
u8 transmission_media = 0;
+ u16 enforce_sfp = 0;
status = hw->phy.ops.read_i2c_eeprom(hw,
IXGBE_SFF_IDENTIFIER, &identifier);
- if (status == IXGBE_ERR_SFP_NOT_PRESENT) {
+ if (status == IXGBE_ERR_SFP_NOT_PRESENT || status == IXGBE_ERR_I2C) {
+ status = IXGBE_ERR_SFP_NOT_PRESENT;
hw->phy.sfp_type = ixgbe_sfp_type_not_present;
+ if (hw->phy.type != ixgbe_phy_nl) {
+ hw->phy.id = 0;
+ hw->phy.type = ixgbe_phy_unknown;
+ }
goto out;
}
+ /* LAN ID is needed for sfp_type determination */
+ hw->mac.ops.set_lan_id(hw);
+
if (identifier == IXGBE_SFF_IDENTIFIER_SFP) {
hw->phy.ops.read_i2c_eeprom(hw, IXGBE_SFF_1GBE_COMP_CODES,
&comp_codes_1g);
@@ -673,18 +776,58 @@ ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw)
* 0 SFP_DA_CU
* 1 SFP_SR
* 2 SFP_LR
+ * 3 SFP_DA_CORE0 - 82599-specific
+ * 4 SFP_DA_CORE1 - 82599-specific
+ * 5 SFP_SR/LR_CORE0 - 82599-specific
+ * 6 SFP_SR/LR_CORE1 - 82599-specific
*/
- if (transmission_media & IXGBE_SFF_TWIN_AX_CAPABLE)
- hw->phy.sfp_type = ixgbe_sfp_type_da_cu;
- else if (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)
- hw->phy.sfp_type = ixgbe_sfp_type_sr;
- else if (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)
- hw->phy.sfp_type = ixgbe_sfp_type_lr;
- else
- hw->phy.sfp_type = ixgbe_sfp_type_unknown;
+ if (hw->mac.type == ixgbe_mac_82598EB) {
+ if (transmission_media & IXGBE_SFF_TWIN_AX_CAPABLE)
+ hw->phy.sfp_type = ixgbe_sfp_type_da_cu;
+ else if (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)
+ hw->phy.sfp_type = ixgbe_sfp_type_sr;
+ else if (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)
+ hw->phy.sfp_type = ixgbe_sfp_type_lr;
+ else
+ hw->phy.sfp_type = ixgbe_sfp_type_unknown;
+ } else if (hw->mac.type == ixgbe_mac_82599EB) {
+ if (transmission_media & IXGBE_SFF_TWIN_AX_CAPABLE)
+ if (hw->bus.lan_id == 0)
+ hw->phy.sfp_type =
+ ixgbe_sfp_type_da_cu_core0;
+ else
+ hw->phy.sfp_type =
+ ixgbe_sfp_type_da_cu_core1;
+ else if (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)
+ if (hw->bus.lan_id == 0)
+ hw->phy.sfp_type =
+ ixgbe_sfp_type_srlr_core0;
+ else
+ hw->phy.sfp_type =
+ ixgbe_sfp_type_srlr_core1;
+ else if (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)
+ if (hw->bus.lan_id == 0)
+ hw->phy.sfp_type =
+ ixgbe_sfp_type_srlr_core0;
+ else
+ hw->phy.sfp_type =
+ ixgbe_sfp_type_srlr_core1;
+ else
+ hw->phy.sfp_type = ixgbe_sfp_type_unknown;
+ }
+
+ if (hw->phy.sfp_type != stored_sfp_type)
+ hw->phy.sfp_setup_needed = true;
+
+ /* Determine if the SFP+ PHY is dual speed or not. */
+ if (((comp_codes_1g & IXGBE_SFF_1GBASESX_CAPABLE) &&
+ (comp_codes_10g & IXGBE_SFF_10GBASESR_CAPABLE)) ||
+ ((comp_codes_1g & IXGBE_SFF_1GBASELX_CAPABLE) &&
+ (comp_codes_10g & IXGBE_SFF_10GBASELR_CAPABLE)))
+ hw->phy.multispeed_fiber = true;
/* Determine PHY vendor */
- if (hw->phy.type == ixgbe_phy_unknown) {
+ if (hw->phy.type != ixgbe_phy_nl) {
hw->phy.id = identifier;
hw->phy.ops.read_i2c_eeprom(hw,
IXGBE_SFF_VENDOR_OUI_BYTE0, &oui_bytes[0]);
@@ -711,6 +854,9 @@ ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw)
case IXGBE_SFF_VENDOR_OUI_AVAGO:
hw->phy.type = ixgbe_phy_sfp_avago;
break;
+ case IXGBE_SFF_VENDOR_OUI_INTEL:
+ hw->phy.type = ixgbe_phy_sfp_intel;
+ break;
default:
if (transmission_media &
IXGBE_SFF_TWIN_AX_CAPABLE)
@@ -720,7 +866,29 @@ ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw)
break;
}
}
- status = IXGBE_SUCCESS;
+
+ if (hw->mac.type == ixgbe_mac_82598EB ||
+ (hw->phy.sfp_type != ixgbe_sfp_type_sr &&
+ hw->phy.sfp_type != ixgbe_sfp_type_lr &&
+ hw->phy.sfp_type != ixgbe_sfp_type_srlr_core0 &&
+ hw->phy.sfp_type != ixgbe_sfp_type_srlr_core1)) {
+ status = IXGBE_SUCCESS;
+ goto out;
+ }
+
+ (void) ixgbe_get_device_caps(hw, &enforce_sfp);
+ if (!(enforce_sfp & IXGBE_DEVICE_CAPS_ALLOW_ANY_SFP)) {
+ /* Make sure we're a supported PHY type */
+ if (hw->phy.type == ixgbe_phy_sfp_intel) {
+ status = IXGBE_SUCCESS;
+ } else {
+ DEBUGOUT("SFP+ module not supported\n");
+ hw->phy.type = ixgbe_phy_sfp_unsupported;
+ status = IXGBE_ERR_SFP_NOT_SUPPORTED;
+ }
+ } else {
+ status = IXGBE_SUCCESS;
+ }
}
out:
@@ -729,12 +897,13 @@ out:
/*
- * ixgbe_get_sfp_init_sequence_offsets - Checks the MAC's EEPROM to see
- * if it supports a given SFP+ module type, if so it returns the offsets to the
- * phy init sequence block.
+ * ixgbe_get_sfp_init_sequence_offsets - Provides offset of PHY init sequence
* @hw: pointer to hardware structure
* @list_offset: offset to the SFP ID list
* @data_offset: offset to the SFP data block
+ *
+ * Checks the MAC's EEPROM to see if it supports a given SFP+ module type, if
+ * so it returns the offsets to the phy init sequence block.
*/
s32 ixgbe_get_sfp_init_sequence_offsets(struct ixgbe_hw *hw,
u16 *list_offset, u16 *data_offset)
@@ -755,7 +924,7 @@ s32 ixgbe_get_sfp_init_sequence_offsets(struct ixgbe_hw *hw,
hw->eeprom.ops.read(hw, IXGBE_PHY_INIT_OFFSET_NL, list_offset);
if ((!*list_offset) || (*list_offset == 0xFFFF))
- return (IXGBE_ERR_PHY);
+ return (IXGBE_ERR_SFP_NO_INIT_SEQ_PRESENT);
/* Shift offset to first ID word */
(*list_offset)++;
@@ -790,3 +959,564 @@ s32 ixgbe_get_sfp_init_sequence_offsets(struct ixgbe_hw *hw,
return (IXGBE_SUCCESS);
}
+
+/*
+ * ixgbe_read_i2c_eeprom_generic - Reads 8 bit EEPROM word over I2C interface
+ * @hw: pointer to hardware structure
+ * @byte_offset: EEPROM byte offset to read
+ * @eeprom_data: value read
+ *
+ * Performs byte read operation to SFP module's EEPROM over I2C interface.
+ */
+s32
+ixgbe_read_i2c_eeprom_generic(struct ixgbe_hw *hw, u8 byte_offset,
+ u8 *eeprom_data)
+{
+ DEBUGFUNC("ixgbe_read_i2c_eeprom_generic");
+
+ return (hw->phy.ops.read_i2c_byte(hw, byte_offset,
+ IXGBE_I2C_EEPROM_DEV_ADDR, eeprom_data));
+}
+
+/*
+ * ixgbe_write_i2c_eeprom_generic - Writes 8 bit EEPROM word over I2C interface
+ * @hw: pointer to hardware structure
+ * @byte_offset: EEPROM byte offset to write
+ * @eeprom_data: value to write
+ *
+ * Performs byte write operation to SFP module's EEPROM over I2C interface.
+ */
+s32 ixgbe_write_i2c_eeprom_generic(struct ixgbe_hw *hw, u8 byte_offset,
+ u8 eeprom_data)
+{
+ DEBUGFUNC("ixgbe_write_i2c_eeprom_generic");
+
+ return (hw->phy.ops.write_i2c_byte(hw, byte_offset,
+ IXGBE_I2C_EEPROM_DEV_ADDR, eeprom_data));
+}
+
+/*
+ * ixgbe_read_i2c_byte_generic - Reads 8 bit word over I2C
+ * @hw: pointer to hardware structure
+ * @byte_offset: byte offset to read
+ * @data: value read
+ *
+ * Performs byte read operation to SFP module's EEPROM over I2C interface at
+ * a specified deivce address.
+ */
+s32
+ixgbe_read_i2c_byte_generic(struct ixgbe_hw *hw, u8 byte_offset,
+ u8 dev_addr, u8 *data)
+{
+ s32 status = IXGBE_SUCCESS;
+ u32 max_retry = 1;
+ u32 retry = 0;
+ u16 swfw_mask = 0;
+ bool nack = 1;
+
+ DEBUGFUNC("ixgbe_read_i2c_byte_generic");
+
+ if (IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)
+ swfw_mask = IXGBE_GSSR_PHY1_SM;
+ else
+ swfw_mask = IXGBE_GSSR_PHY0_SM;
+
+ if (ixgbe_acquire_swfw_sync(hw, swfw_mask) != IXGBE_SUCCESS) {
+ status = IXGBE_ERR_SWFW_SYNC;
+ goto read_byte_out;
+ }
+
+ do {
+ ixgbe_i2c_start(hw);
+
+ /* Device Address and write indication */
+ status = ixgbe_clock_out_i2c_byte(hw, dev_addr);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_get_i2c_ack(hw);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_clock_out_i2c_byte(hw, byte_offset);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_get_i2c_ack(hw);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ ixgbe_i2c_start(hw);
+
+ /* Device Address and read indication */
+ status = ixgbe_clock_out_i2c_byte(hw, (dev_addr | 0x1));
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_get_i2c_ack(hw);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_clock_in_i2c_byte(hw, data);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_clock_out_i2c_bit(hw, nack);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ ixgbe_i2c_stop(hw);
+ break;
+
+fail:
+ ixgbe_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);
+
+ ixgbe_release_swfw_sync(hw, swfw_mask);
+
+read_byte_out:
+ return (status);
+}
+
+/*
+ * ixgbe_write_i2c_byte_generic - Writes 8 bit word over I2C
+ * @hw: pointer to hardware structure
+ * @byte_offset: byte offset to write
+ * @data: value to write
+ *
+ * Performs byte write operation to SFP module's EEPROM over I2C interface at
+ * a specified device address.
+ */
+s32
+ixgbe_write_i2c_byte_generic(struct ixgbe_hw *hw, u8 byte_offset,
+ u8 dev_addr, u8 data)
+{
+ s32 status = IXGBE_SUCCESS;
+ u32 max_retry = 1;
+ u32 retry = 0;
+ u16 swfw_mask = 0;
+
+ DEBUGFUNC("ixgbe_write_i2c_byte_generic");
+
+ if (IXGBE_READ_REG(hw, IXGBE_STATUS) & IXGBE_STATUS_LAN_ID_1)
+ swfw_mask = IXGBE_GSSR_PHY1_SM;
+ else
+ swfw_mask = IXGBE_GSSR_PHY0_SM;
+
+ if (ixgbe_acquire_swfw_sync(hw, swfw_mask) != IXGBE_SUCCESS) {
+ status = IXGBE_ERR_SWFW_SYNC;
+ goto write_byte_out;
+ }
+
+ do {
+ ixgbe_i2c_start(hw);
+
+ status = ixgbe_clock_out_i2c_byte(hw, dev_addr);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_get_i2c_ack(hw);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_clock_out_i2c_byte(hw, byte_offset);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_get_i2c_ack(hw);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_clock_out_i2c_byte(hw, data);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ status = ixgbe_get_i2c_ack(hw);
+ if (status != IXGBE_SUCCESS)
+ goto fail;
+
+ ixgbe_i2c_stop(hw);
+ break;
+
+fail:
+ ixgbe_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);
+
+ ixgbe_release_swfw_sync(hw, swfw_mask);
+
+write_byte_out:
+ return (status);
+}
+
+/*
+ * ixgbe_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
+ixgbe_i2c_start(struct ixgbe_hw *hw)
+{
+ u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+
+ DEBUGFUNC("ixgbe_i2c_start");
+
+ /* Start condition must begin with data and clock high */
+ (void) ixgbe_set_i2c_data(hw, &i2cctl, 1);
+ (void) ixgbe_raise_i2c_clk(hw, &i2cctl);
+
+ /* Setup time for start condition (4.7us) */
+ usec_delay(IXGBE_I2C_T_SU_STA);
+
+ (void) ixgbe_set_i2c_data(hw, &i2cctl, 0);
+
+ /* Hold time for start condition (4us) */
+ usec_delay(IXGBE_I2C_T_HD_STA);
+
+ ixgbe_lower_i2c_clk(hw, &i2cctl);
+
+ /* Minimum low period of clock is 4.7 us */
+ usec_delay(IXGBE_I2C_T_LOW);
+}
+
+/*
+ * ixgbe_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
+ixgbe_i2c_stop(struct ixgbe_hw *hw)
+{
+ u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+
+ DEBUGFUNC("ixgbe_i2c_stop");
+
+ /* Stop condition must begin with data low and clock high */
+ (void) ixgbe_set_i2c_data(hw, &i2cctl, 0);
+ (void) ixgbe_raise_i2c_clk(hw, &i2cctl);
+
+ /* Setup time for stop condition (4us) */
+ usec_delay(IXGBE_I2C_T_SU_STO);
+
+ (void) ixgbe_set_i2c_data(hw, &i2cctl, 1);
+
+ /* bus free time between stop and start (4.7us) */
+ usec_delay(IXGBE_I2C_T_BUF);
+}
+
+/*
+ * ixgbe_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
+ixgbe_clock_in_i2c_byte(struct ixgbe_hw *hw, u8 *data)
+{
+ s32 status = IXGBE_SUCCESS;
+ s32 i;
+ bool bit = 0;
+
+ DEBUGFUNC("ixgbe_clock_in_i2c_byte");
+
+ for (i = 7; i >= 0; i--) {
+ status = ixgbe_clock_in_i2c_bit(hw, &bit);
+ *data |= bit<<i;
+
+ if (status != IXGBE_SUCCESS)
+ break;
+ }
+
+ return (status);
+}
+
+/*
+ * ixgbe_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
+ixgbe_clock_out_i2c_byte(struct ixgbe_hw *hw, u8 data)
+{
+ s32 status = IXGBE_SUCCESS;
+ s32 i;
+ u32 i2cctl;
+ bool bit = 0;
+
+ DEBUGFUNC("ixgbe_clock_out_i2c_byte");
+
+ for (i = 7; i >= 0; i--) {
+ bit = (data >> i) & 0x1;
+ status = ixgbe_clock_out_i2c_bit(hw, bit);
+
+ if (status != IXGBE_SUCCESS)
+ break;
+ }
+
+ /* Release SDA line (set high) */
+ i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+ i2cctl |= IXGBE_I2C_DATA_OUT;
+ IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, i2cctl);
+
+ return (status);
+}
+
+/*
+ * ixgbe_get_i2c_ack - Polls for I2C ACK
+ * @hw: pointer to hardware structure
+ *
+ * Clocks in/out one bit via I2C data/clock
+ */
+static s32
+ixgbe_get_i2c_ack(struct ixgbe_hw *hw)
+{
+ s32 status;
+ u32 i = 0;
+ u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+ u32 timeout = 10;
+ bool ack = 1;
+
+ DEBUGFUNC("ixgbe_get_i2c_ack");
+
+ status = ixgbe_raise_i2c_clk(hw, &i2cctl);
+
+ if (status != IXGBE_SUCCESS)
+ goto out;
+
+ /* Minimum high period of clock is 4us */
+ usec_delay(IXGBE_I2C_T_HIGH);
+
+ /*
+ * Poll for ACK. Note that ACK in I2C spec is
+ * transition from 1 to 0
+ */
+ for (i = 0; i < timeout; i++) {
+ i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+ ack = ixgbe_get_i2c_data(&i2cctl);
+
+ usec_delay(1);
+ if (ack == 0)
+ break;
+ }
+
+ if (ack == 1) {
+ DEBUGOUT("I2C ack was not received.\n");
+ status = IXGBE_ERR_I2C;
+ }
+
+ ixgbe_lower_i2c_clk(hw, &i2cctl);
+
+ /* Minimum low period of clock is 4.7 us */
+ usec_delay(IXGBE_I2C_T_LOW);
+
+out:
+ return (status);
+}
+
+/*
+ * ixgbe_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
+ixgbe_clock_in_i2c_bit(struct ixgbe_hw *hw, bool *data)
+{
+ s32 status;
+ u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+
+ status = ixgbe_raise_i2c_clk(hw, &i2cctl);
+
+ /* Minimum high period of clock is 4us */
+ usec_delay(IXGBE_I2C_T_HIGH);
+
+ i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+ *data = ixgbe_get_i2c_data(&i2cctl);
+
+ ixgbe_lower_i2c_clk(hw, &i2cctl);
+
+ /* Minimum low period of clock is 4.7 us */
+ usec_delay(IXGBE_I2C_T_LOW);
+
+ return (status);
+}
+
+/*
+ * ixgbe_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
+ixgbe_clock_out_i2c_bit(struct ixgbe_hw *hw, bool data)
+{
+ s32 status;
+ u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+
+ status = ixgbe_set_i2c_data(hw, &i2cctl, data);
+ if (status == IXGBE_SUCCESS) {
+ status = ixgbe_raise_i2c_clk(hw, &i2cctl);
+
+ /* Minimum high period of clock is 4us */
+ usec_delay(IXGBE_I2C_T_HIGH);
+
+ ixgbe_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(IXGBE_I2C_T_LOW);
+ } else {
+ status = IXGBE_ERR_I2C;
+ DEBUGOUT1("I2C data was not set to %X\n", data);
+ }
+
+ return (status);
+}
+
+/*
+ * ixgbe_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 s32
+ixgbe_raise_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
+{
+ s32 status = IXGBE_SUCCESS;
+
+ *i2cctl |= IXGBE_I2C_CLK_OUT;
+
+ IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
+
+ /* SCL rise time (1000ns) */
+ usec_delay(IXGBE_I2C_T_RISE);
+
+ return (status);
+}
+
+/*
+ * ixgbe_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
+ixgbe_lower_i2c_clk(struct ixgbe_hw *hw, u32 *i2cctl)
+{
+ *i2cctl &= ~IXGBE_I2C_CLK_OUT;
+
+ IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
+
+ /* SCL fall time (300ns) */
+ usec_delay(IXGBE_I2C_T_FALL);
+}
+
+/*
+ * ixgbe_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
+ixgbe_set_i2c_data(struct ixgbe_hw *hw, u32 *i2cctl, bool data)
+{
+ s32 status = IXGBE_SUCCESS;
+
+ if (data)
+ *i2cctl |= IXGBE_I2C_DATA_OUT;
+ else
+ *i2cctl &= ~IXGBE_I2C_DATA_OUT;
+
+ IXGBE_WRITE_REG(hw, IXGBE_I2CCTL, *i2cctl);
+
+ /* Data rise/fall (1000ns/300ns) and set-up time (250ns) */
+ usec_delay(IXGBE_I2C_T_RISE + IXGBE_I2C_T_FALL + IXGBE_I2C_T_SU_DATA);
+
+ /* Verify data was set correctly */
+ *i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+ if (data != ixgbe_get_i2c_data(i2cctl)) {
+ status = IXGBE_ERR_I2C;
+ DEBUGOUT1("Error - I2C data was not set to %X.\n", data);
+ }
+
+ return (status);
+}
+
+/*
+ * ixgbe_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
+ixgbe_get_i2c_data(u32 *i2cctl)
+{
+ bool data;
+
+ if (*i2cctl & IXGBE_I2C_DATA_IN)
+ data = 1;
+ else
+ data = 0;
+
+ return (data);
+}
+
+/*
+ * ixgbe_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
+ixgbe_i2c_bus_clear(struct ixgbe_hw *hw)
+{
+ u32 i2cctl = IXGBE_READ_REG(hw, IXGBE_I2CCTL);
+ u32 i;
+
+ DEBUGFUNC("ixgbe_i2c_bus_clear");
+
+ ixgbe_i2c_start(hw);
+
+ (void) ixgbe_set_i2c_data(hw, &i2cctl, 1);
+
+ for (i = 0; i < 9; i++) {
+ (void) ixgbe_raise_i2c_clk(hw, &i2cctl);
+
+ /* Min high period of clock is 4us */
+ usec_delay(IXGBE_I2C_T_HIGH);
+
+ ixgbe_lower_i2c_clk(hw, &i2cctl);
+
+ /* Min low period of clock is 4.7us */
+ usec_delay(IXGBE_I2C_T_LOW);
+ }
+
+ ixgbe_i2c_start(hw);
+
+ /* Put the i2c bus back to default state */
+ ixgbe_i2c_stop(hw);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-06-01 16:16:41 +0000