Date:	Thu, 29 Mar 2007 09:40:15 -0700
From:	Auke Kok <auke-jan.h.kok@...el.com>
To:	jeff@...zik.org
Cc:	auke-jan.h.kok@...el.com, bruce.w.allan@...el.com,
	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	cramerj@...el.com, john.ronciak@...el.com,
	arjan.van.de.ven@...el.com, akpm@...ux-foundation.org,
	netdev@...r.kernel.org
Subject: [PATCH 09/19] e1000: Add 82542 specific hardware code.

From: Jeb Cramer <cramerj@...el.com>

Adapter-specific code for the 82542.

Signed-off-by: Jeb Cramer <cramerj@...el.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com>
---

 drivers/net/e1000/e1000_82542.c |  551 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 551 insertions(+), 0 deletions(-)

diff --git a/drivers/net/e1000/e1000_82542.c b/drivers/net/e1000/e1000_82542.c
new file mode 100644
index 0000000..adca182
--- /dev/null
+++ b/drivers/net/e1000/e1000_82542.c
@@ -0,0 +1,551 @@
+/*******************************************************************************
+
+  Intel PRO/1000 Linux driver
+  Copyright(c) 1999 - 2007 Intel Corporation.
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+  more details.
+
+  You should have received a copy of the GNU General Public License along with
+  this program; if not, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Contact Information:
+  Linux NICS <linux.nics@...el.com>
+  e1000-devel Mailing List <e1000-devel@...ts.sourceforge.net>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+*******************************************************************************/
+
+/* e1000_82542 (rev 1 & 2)
+ */
+
+#include "e1000_api.h"
+
+void e1000_init_function_pointers_82542(struct e1000_hw *hw);
+
+static s32  e1000_init_phy_params_82542(struct e1000_hw *hw);
+static s32  e1000_init_nvm_params_82542(struct e1000_hw *hw);
+static s32  e1000_init_mac_params_82542(struct e1000_hw *hw);
+static s32  e1000_get_bus_info_82542(struct e1000_hw *hw);
+static s32  e1000_reset_hw_82542(struct e1000_hw *hw);
+static s32  e1000_init_hw_82542(struct e1000_hw *hw);
+static s32  e1000_setup_link_82542(struct e1000_hw *hw);
+static s32  e1000_led_on_82542(struct e1000_hw *hw);
+static s32  e1000_led_off_82542(struct e1000_hw *hw);
+static void e1000_clear_hw_cntrs_82542(struct e1000_hw *hw);
+
+struct e1000_dev_spec_82542 {
+	boolean_t dma_fairness;
+};
+
+/**
+ *  e1000_init_phy_params_82542 - Init PHY func ptrs.
+ *  @hw: pointer to the HW structure
+ *
+ *  This is a function pointer entry point called by the api module.
+ **/
+static s32
+e1000_init_phy_params_82542(struct e1000_hw *hw)
+{
+	struct e1000_phy_info *phy = &hw->phy;
+	s32 ret_val = E1000_SUCCESS;
+
+	DEBUGFUNC("e1000_init_phy_params_82542");
+
+	phy->type               = e1000_phy_none;
+
+	return ret_val;
+}
+
+/**
+ *  e1000_init_nvm_params_82542 - Init NVM func ptrs.
+ *  @hw: pointer to the HW structure
+ *
+ *  This is a function pointer entry point called by the api module.
+ **/
+static s32
+e1000_init_nvm_params_82542(struct e1000_hw *hw)
+{
+	struct e1000_nvm_info *nvm = &hw->nvm;
+	struct e1000_functions *func = &hw->func;
+
+	DEBUGFUNC("e1000_init_nvm_params_82542");
+
+	nvm->address_bits       =  6;
+	nvm->delay_usec         = 50;
+	nvm->opcode_bits        =  3;
+	nvm->type               = e1000_nvm_eeprom_microwire;
+	nvm->word_size          = 64;
+
+	/* Function Pointers */
+	func->read_nvm          = e1000_read_nvm_microwire;
+	func->release_nvm       = e1000_stop_nvm;
+	func->write_nvm         = e1000_write_nvm_microwire;
+	func->update_nvm        = e1000_update_nvm_checksum_generic;
+	func->validate_nvm      = e1000_validate_nvm_checksum_generic;
+
+	return E1000_SUCCESS;
+}
+
+/**
+ *  e1000_init_mac_params_82542 - Init MAC func ptrs.
+ *  @hw: pointer to the HW structure
+ *
+ *  This is a function pointer entry point called by the api module.
+ **/
+static s32
+e1000_init_mac_params_82542(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	struct e1000_functions *func = &hw->func;
+	s32 ret_val = E1000_SUCCESS;
+
+	DEBUGFUNC("e1000_init_mac_params_82542");
+
+	/* Set media type */
+	hw->media_type = e1000_media_type_fiber;
+
+	/* Set mta register count */
+	mac->mta_reg_count = 128;
+	/* Set rar entry count */
+	mac->rar_entry_count = E1000_RAR_ENTRIES;
+
+	/* Function pointers */
+
+	/* bus type/speed/width */
+	func->get_bus_info = e1000_get_bus_info_82542;
+	/* reset */
+	func->reset_hw = e1000_reset_hw_82542;
+	/* hw initialization */
+	func->init_hw = e1000_init_hw_82542;
+	/* link setup */
+	func->setup_link = e1000_setup_link_82542;
+	/* phy/fiber/serdes setup */
+	func->setup_physical_interface = e1000_setup_fiber_serdes_link_generic;
+	/* check for link */
+	func->check_for_link = e1000_check_for_fiber_link_generic;
+	/* multicast address update */
+	func->mc_addr_list_update = e1000_mc_addr_list_update_generic;
+	/* writing VFTA */
+	func->write_vfta = e1000_write_vfta_generic;
+	/* clearing VFTA */
+	func->clear_vfta = e1000_clear_vfta_generic;
+	/* setting MTA */
+	func->mta_set = e1000_mta_set_generic;
+	/* turn on/off LED */
+	func->led_on = e1000_led_on_82542;
+	func->led_off = e1000_led_off_82542;
+	/* remove device */
+	func->remove_device = e1000_remove_device_generic;
+	/* clear hardware counters */
+	func->clear_hw_cntrs = e1000_clear_hw_cntrs_82542;
+	/* link info */
+	func->get_link_up_info = e1000_get_speed_and_duplex_fiber_serdes_generic;
+
+	hw->dev_spec_size = sizeof(struct e1000_dev_spec_82542);
+
+	/* Device-specific structure allocation */
+	ret_val = e1000_alloc_zeroed_dev_spec_struct(hw, hw->dev_spec_size);
+
+	return ret_val;
+}
+
+/**
+ *  e1000_init_function_pointers_82542 - Init func ptrs.
+ *  @hw: pointer to the HW structure
+ *
+ *  The only function explicitly called by the api module to initialize
+ *  all function pointers and parameters.
+ **/
+void
+e1000_init_function_pointers_82542(struct e1000_hw *hw)
+{
+	DEBUGFUNC("e1000_init_function_pointers_82542");
+
+	hw->func.init_mac_params = e1000_init_mac_params_82542;
+	hw->func.init_nvm_params = e1000_init_nvm_params_82542;
+	hw->func.init_phy_params = e1000_init_phy_params_82542;
+}
+
+/**
+ *  e1000_get_bus_info_82542 - Obtain bus information for adapter
+ *  @hw: pointer to the HW structure
+ *
+ *  This will obtain information about the HW bus for which the
+ *  adaper is attached and stores it in the hw structure.  This is a function
+ *  pointer entry point called by the api module.
+ **/
+static s32
+e1000_get_bus_info_82542(struct e1000_hw *hw)
+{
+	DEBUGFUNC("e1000_get_bus_info_82542");
+
+	hw->bus.type = e1000_bus_type_pci;
+	hw->bus.speed = e1000_bus_speed_unknown;
+	hw->bus.width = e1000_bus_width_unknown;
+
+	return E1000_SUCCESS;
+}
+
+/**
+ *  e1000_reset_hw_82542 - Reset hardware
+ *  @hw: pointer to the HW structure
+ *
+ *  This resets the hardware into a known state.  This is a
+ *  function pointer entry point called by the api module.
+ **/
+static s32
+e1000_reset_hw_82542(struct e1000_hw *hw)
+{
+	struct e1000_bus_info *bus = &hw->bus;
+	s32 ret_val = E1000_SUCCESS;
+	u32 ctrl, icr;
+
+	DEBUGFUNC("e1000_reset_hw_82542");
+
+	if (hw->revision_id == E1000_REVISION_2) {
+		DEBUGOUT("Disabling MWI on 82542 rev 2\n");
+		e1000_pci_clear_mwi(hw);
+	}
+
+	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);
+
+	/* Delay to allow any outstanding PCI transactions to complete before
+	 * resetting the device
+	 */
+	msleep(10);
+
+	ctrl = E1000_READ_REG(hw, E1000_CTRL);
+
+	DEBUGOUT("Issuing a global reset to 82542/82543 MAC\n");
+	E1000_WRITE_REG(hw, E1000_CTRL, ctrl | E1000_CTRL_RST);
+
+	e1000_reload_nvm(hw);
+	msleep(2);
+
+	E1000_WRITE_REG(hw, E1000_IMC, 0xffffffff);
+	icr = E1000_READ_REG(hw, E1000_ICR);
+
+	if (hw->revision_id == E1000_REVISION_2) {
+		if (bus->pci_cmd_word & PCI_COMMAND_INVALIDATE)
+			e1000_pci_set_mwi(hw);
+	}
+
+	return ret_val;
+}
+
+/**
+ *  e1000_init_hw_82542 - Initialize hardware
+ *  @hw: pointer to the HW structure
+ *
+ *  This inits the hardware readying it for operation.  This is a
+ *  function pointer entry point called by the api module.
+ **/
+static s32
+e1000_init_hw_82542(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	struct e1000_dev_spec_82542 *dev_spec;
+	s32 ret_val = E1000_SUCCESS;
+	u32 ctrl;
+	u16 i;
+
+	DEBUGFUNC("e1000_init_hw_82542");
+
+	dev_spec = (struct e1000_dev_spec_82542 *)hw->dev_spec;
+
+	/* Disabling VLAN filtering */
+	E1000_WRITE_REG(hw, E1000_VET, 0);
+	e1000_clear_vfta(hw);
+
+	/* For 82542 (rev 2.0), disable MWI and put the receiver into reset */
+	if (hw->revision_id == E1000_REVISION_2) {
+		DEBUGOUT("Disabling MWI on 82542 rev 2.0\n");
+		e1000_pci_clear_mwi(hw);
+		E1000_WRITE_REG(hw, E1000_RCTL, E1000_RCTL_RST);
+		E1000_WRITE_FLUSH(hw);
+		msleep(5);
+	}
+
+	/* Setup the receive address. */
+	e1000_init_rx_addrs_generic(hw, mac->rar_entry_count);
+
+	/* For 82542 (rev 2.0), take the receiver out of reset and enable MWI */
+	if (hw->revision_id == E1000_REVISION_2) {
+		E1000_WRITE_REG(hw, E1000_RCTL, 0);
+		E1000_WRITE_FLUSH(hw);
+		msleep(1);
+		if (hw->bus.pci_cmd_word & PCI_COMMAND_INVALIDATE)
+			e1000_pci_set_mwi(hw);
+	}
+
+	/* 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);
+
+	/* Set the PCI priority bit correctly in the CTRL register.  This
+	 * determines if the adapter gives priority to receives, or if it
+	 * gives equal priority to transmits and receives.
+	 */
+	if (dev_spec->dma_fairness) {
+		ctrl = E1000_READ_REG(hw, E1000_CTRL);
+		E1000_WRITE_REG(hw, E1000_CTRL, ctrl | E1000_CTRL_PRIOR);
+	}
+
+	/* Setup link and flow control */
+	ret_val = e1000_setup_link_82542(hw);
+
+	/* Clear all of the statistics registers (clear on read).  It is
+	 * important that we do this after we have tried to establish link
+	 * because the symbol error count will increment wildly if there
+	 * is no link.
+	 */
+	e1000_clear_hw_cntrs_82542(hw);
+
+	return ret_val;
+}
+
+/**
+ *  e1000_setup_link_82542 - Setup flow control and link settings
+ *  @hw: pointer to the HW structure
+ *
+ *  Determines which flow control settings to use, then configures flow
+ *  control.  Calls the appropriate media-specific link configuration
+ *  function.  Assuming the adapter has a valid link partner, a valid link
+ *  should be established.  Assumes the hardware has previously been reset
+ *  and the transmitter and receiver are not enabled.  This is a function
+ *  pointer entry point called by the api module.
+ **/
+static s32
+e1000_setup_link_82542(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	struct e1000_functions *func = &hw->func;
+	s32 ret_val = E1000_SUCCESS;
+
+	DEBUGFUNC("e1000_setup_link_82542");
+
+	ret_val = e1000_set_default_fc_generic(hw);
+	if (ret_val)
+		goto out;
+
+	mac->fc &= ~e1000_fc_tx_pause;
+
+	if (mac->report_tx_early == 1)
+		mac->fc &= ~e1000_fc_rx_pause;
+
+	/* We want to save off the original Flow Control configuration just in
+	 * case we get disconnected and then reconnected into a different hub
+	 * or switch with different Flow Control capabilities.
+	 */
+	mac->original_fc = mac->fc;
+
+	DEBUGOUT1("After fix-ups FlowControl is now = %x\n", mac->fc);
+
+	/* Call the necessary subroutine to configure the link. */
+	ret_val = func->setup_physical_interface(hw);
+	if (ret_val)
+		goto out;
+
+	/* Initialize the flow control address, type, and PAUSE timer
+	 * registers to their default values.  This is done even if flow
+	 * control is disabled, because it does not hurt anything to
+	 * initialize these registers.
+	 */
+	DEBUGOUT("Initializing Flow Control address, type and timer regs\n");
+
+	E1000_WRITE_REG(hw, E1000_FCAL, FLOW_CONTROL_ADDRESS_LOW);
+	E1000_WRITE_REG(hw, E1000_FCAH, FLOW_CONTROL_ADDRESS_HIGH);
+	E1000_WRITE_REG(hw, E1000_FCT, FLOW_CONTROL_TYPE);
+
+	E1000_WRITE_REG(hw, E1000_FCTTV, mac->fc_pause_time);
+
+	ret_val = e1000_set_fc_watermarks_generic(hw);
+
+out:
+	return ret_val;
+}
+
+/**
+ *  e1000_led_on_82542 - Turn on SW controllable LED
+ *  @hw: pointer to the HW structure
+ *
+ *  Turns the SW defined LED on.  This is a function pointer entry point
+ *  called by the api module.
+ **/
+static s32
+e1000_led_on_82542(struct e1000_hw *hw)
+{
+	u32 ctrl = E1000_READ_REG(hw, E1000_CTRL);
+
+	DEBUGFUNC("e1000_led_on_82542");
+
+	ctrl |= E1000_CTRL_SWDPIN0;
+	ctrl |= E1000_CTRL_SWDPIO0;
+	E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
+
+	return E1000_SUCCESS;
+}
+
+/**
+ *  e1000_led_off_82542 - Turn off SW controllable LED
+ *  @hw: pointer to the HW structure
+ *
+ *  Turns the SW defined LED off.  This is a function pointer entry point
+ *  called by the api module.
+ **/
+static s32
+e1000_led_off_82542(struct e1000_hw *hw)
+{
+	u32 ctrl = E1000_READ_REG(hw, E1000_CTRL);
+
+	DEBUGFUNC("e1000_led_off_82542");
+
+	ctrl &= ~E1000_CTRL_SWDPIN0;
+	ctrl |= E1000_CTRL_SWDPIO0;
+	E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
+
+	return E1000_SUCCESS;
+}
+
+/**
+ *  e1000_translate_register_82542 - Translate the proper regiser offset
+ *  @reg: e1000 register to be read
+ *
+ *  Registers in 82542 are located in different offsets than other adapters
+ *  even though they function in the same manner.  This function takes in
+ *  the name of the register to read and returns the correct offset for
+ *  82542 silicon.
+ **/
+u32
+e1000_translate_register_82542(u32 reg)
+{
+	/* Some of the 82542 registers are located at different
+	 * offsets than they are in newer adapters.
+	 * Despite the difference in location, the registers
+	 * function in the same manner.
+	 */
+	switch (reg) {
+	case E1000_RA:
+		reg = 0x00040;
+		break;
+	case E1000_RDTR:
+		reg = 0x00108;
+		break;
+	case E1000_RDBAL:
+		reg = 0x00110;
+		break;
+	case E1000_RDBAH:
+		reg = 0x00114;
+		break;
+	case E1000_RDLEN:
+		reg = 0x00118;
+		break;
+	case E1000_RDH:
+		reg = 0x00120;
+		break;
+	case E1000_RDT:
+		reg = 0x00128;
+		break;
+	case E1000_RDBAL1:
+		reg = 0x00138;
+		break;
+	case E1000_RDBAH1:
+		reg = 0x0013C;
+		break;
+	case E1000_RDLEN1:
+		reg = 0x00140;
+		break;
+	case E1000_RDH1:
+		reg = 0x00148;
+		break;
+	case E1000_RDT1:
+		reg = 0x00150;
+		break;
+	case E1000_FCRTH:
+		reg = 0x00160;
+		break;
+	case E1000_FCRTL:
+		reg = 0x00168;
+		break;
+	case E1000_MTA:
+		reg = 0x00200;
+		break;
+	case E1000_TDBAL:
+		reg = 0x00420;
+		break;
+	case E1000_TDBAH:
+		reg = 0x00424;
+		break;
+	case E1000_TDLEN:
+		reg = 0x00428;
+		break;
+	case E1000_TDH:
+		reg = 0x00430;
+		break;
+	case E1000_TDT:
+		reg = 0x00438;
+		break;
+	case E1000_TIDV:
+		reg = 0x00440;
+		break;
+	case E1000_VFTA:
+		reg = 0x00600;
+		break;
+	case E1000_TDFH:
+		reg = 0x08010;
+		break;
+	case E1000_TDFT:
+		reg = 0x08018;
+		break;
+	default:
+		break;
+	}
+
+	return reg;
+}
+
+/**
+ *  e1000_clear_hw_cntrs_82542 - 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_82542(struct e1000_hw *hw)
+{
+	volatile u32 temp;
+
+	DEBUGFUNC("e1000_clear_hw_cntrs_82542");
+
+	e1000_clear_hw_cntrs_base_generic(hw);
+
+	temp = E1000_READ_REG(hw, E1000_PRC64);
+	temp = E1000_READ_REG(hw, E1000_PRC127);
+	temp = E1000_READ_REG(hw, E1000_PRC255);
+	temp = E1000_READ_REG(hw, E1000_PRC511);
+	temp = E1000_READ_REG(hw, E1000_PRC1023);
+	temp = E1000_READ_REG(hw, E1000_PRC1522);
+	temp = E1000_READ_REG(hw, E1000_PTC64);
+	temp = E1000_READ_REG(hw, E1000_PTC127);
+	temp = E1000_READ_REG(hw, E1000_PTC255);
+	temp = E1000_READ_REG(hw, E1000_PTC511);
+	temp = E1000_READ_REG(hw, E1000_PTC1023);
+	temp = E1000_READ_REG(hw, E1000_PTC1522);
+}
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