267 lines
7.3 KiB
C
267 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* atlx.c -- common functions for Attansic network drivers
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*
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* Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
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* Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
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* Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
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* Copyright(c) 2007 Atheros Corporation. All rights reserved.
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*
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* Derived from Intel e1000 driver
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* Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
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*/
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/* Including this file like a header is a temporary hack, I promise. -- CHS */
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#ifndef ATLX_C
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#define ATLX_C
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/etherdevice.h>
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#include <linux/if.h>
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#include <linux/netdevice.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include "atlx.h"
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static s32 atlx_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data);
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static u32 atlx_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr);
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static void atlx_set_mac_addr(struct atl1_hw *hw);
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static struct atlx_spi_flash_dev flash_table[] = {
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/* MFR_NAME WRSR READ PRGM WREN WRDI RDSR RDID SEC_ERS CHIP_ERS */
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{"Atmel", 0x00, 0x03, 0x02, 0x06, 0x04, 0x05, 0x15, 0x52, 0x62},
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{"SST", 0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0x90, 0x20, 0x60},
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{"ST", 0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0xAB, 0xD8, 0xC7},
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};
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static int atlx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
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{
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switch (cmd) {
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case SIOCGMIIPHY:
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case SIOCGMIIREG:
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case SIOCSMIIREG:
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return atlx_mii_ioctl(netdev, ifr, cmd);
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default:
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return -EOPNOTSUPP;
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}
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}
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/**
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* atlx_set_mac - Change the Ethernet Address of the NIC
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* @netdev: network interface device structure
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* @p: pointer to an address structure
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*
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* Returns 0 on success, negative on failure
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*/
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static int atlx_set_mac(struct net_device *netdev, void *p)
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{
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struct atlx_adapter *adapter = netdev_priv(netdev);
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struct sockaddr *addr = p;
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if (netif_running(netdev))
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return -EBUSY;
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if (!is_valid_ether_addr(addr->sa_data))
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return -EADDRNOTAVAIL;
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eth_hw_addr_set(netdev, addr->sa_data);
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memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
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atlx_set_mac_addr(&adapter->hw);
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return 0;
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}
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static void atlx_check_for_link(struct atlx_adapter *adapter)
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{
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struct net_device *netdev = adapter->netdev;
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u16 phy_data = 0;
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spin_lock(&adapter->lock);
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adapter->phy_timer_pending = false;
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atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
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atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
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spin_unlock(&adapter->lock);
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/* notify upper layer link down ASAP */
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if (!(phy_data & BMSR_LSTATUS)) {
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/* Link Down */
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if (netif_carrier_ok(netdev)) {
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/* old link state: Up */
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dev_info(&adapter->pdev->dev, "%s link is down\n",
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netdev->name);
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adapter->link_speed = SPEED_0;
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netif_carrier_off(netdev);
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}
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}
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schedule_work(&adapter->link_chg_task);
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}
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/**
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* atlx_set_multi - Multicast and Promiscuous mode set
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* @netdev: network interface device structure
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*
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* The set_multi entry point is called whenever the multicast address
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* list or the network interface flags are updated. This routine is
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* responsible for configuring the hardware for proper multicast,
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* promiscuous mode, and all-multi behavior.
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*/
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static void atlx_set_multi(struct net_device *netdev)
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{
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struct atlx_adapter *adapter = netdev_priv(netdev);
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struct atlx_hw *hw = &adapter->hw;
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struct netdev_hw_addr *ha;
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u32 rctl;
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u32 hash_value;
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/* Check for Promiscuous and All Multicast modes */
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rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
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if (netdev->flags & IFF_PROMISC)
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rctl |= MAC_CTRL_PROMIS_EN;
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else if (netdev->flags & IFF_ALLMULTI) {
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rctl |= MAC_CTRL_MC_ALL_EN;
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rctl &= ~MAC_CTRL_PROMIS_EN;
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} else
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rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
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iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
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/* clear the old settings from the multicast hash table */
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iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
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iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
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/* compute mc addresses' hash value ,and put it into hash table */
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netdev_for_each_mc_addr(ha, netdev) {
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hash_value = atlx_hash_mc_addr(hw, ha->addr);
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atlx_hash_set(hw, hash_value);
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}
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}
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static inline void atlx_imr_set(struct atlx_adapter *adapter,
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unsigned int imr)
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{
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iowrite32(imr, adapter->hw.hw_addr + REG_IMR);
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ioread32(adapter->hw.hw_addr + REG_IMR);
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}
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/**
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* atlx_irq_enable - Enable default interrupt generation settings
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* @adapter: board private structure
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*/
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static void atlx_irq_enable(struct atlx_adapter *adapter)
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{
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atlx_imr_set(adapter, IMR_NORMAL_MASK);
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adapter->int_enabled = true;
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}
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/**
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* atlx_irq_disable - Mask off interrupt generation on the NIC
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* @adapter: board private structure
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*/
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static void atlx_irq_disable(struct atlx_adapter *adapter)
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{
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adapter->int_enabled = false;
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atlx_imr_set(adapter, 0);
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synchronize_irq(adapter->pdev->irq);
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}
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static void atlx_clear_phy_int(struct atlx_adapter *adapter)
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{
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u16 phy_data;
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unsigned long flags;
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spin_lock_irqsave(&adapter->lock, flags);
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atlx_read_phy_reg(&adapter->hw, 19, &phy_data);
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spin_unlock_irqrestore(&adapter->lock, flags);
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}
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/**
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* atlx_tx_timeout - Respond to a Tx Hang
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* @netdev: network interface device structure
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*/
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static void atlx_tx_timeout(struct net_device *netdev, unsigned int txqueue)
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{
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struct atlx_adapter *adapter = netdev_priv(netdev);
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/* Do the reset outside of interrupt context */
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schedule_work(&adapter->reset_dev_task);
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}
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/*
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* atlx_link_chg_task - deal with link change event Out of interrupt context
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*/
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static void atlx_link_chg_task(struct work_struct *work)
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{
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struct atlx_adapter *adapter;
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unsigned long flags;
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adapter = container_of(work, struct atlx_adapter, link_chg_task);
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spin_lock_irqsave(&adapter->lock, flags);
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atlx_check_link(adapter);
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spin_unlock_irqrestore(&adapter->lock, flags);
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}
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static void __atlx_vlan_mode(netdev_features_t features, u32 *ctrl)
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{
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if (features & NETIF_F_HW_VLAN_CTAG_RX) {
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/* enable VLAN tag insert/strip */
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*ctrl |= MAC_CTRL_RMV_VLAN;
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} else {
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/* disable VLAN tag insert/strip */
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*ctrl &= ~MAC_CTRL_RMV_VLAN;
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}
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}
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static void atlx_vlan_mode(struct net_device *netdev,
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netdev_features_t features)
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{
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struct atlx_adapter *adapter = netdev_priv(netdev);
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unsigned long flags;
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u32 ctrl;
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spin_lock_irqsave(&adapter->lock, flags);
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/* atlx_irq_disable(adapter); FIXME: confirm/remove */
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ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
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__atlx_vlan_mode(features, &ctrl);
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iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
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/* atlx_irq_enable(adapter); FIXME */
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spin_unlock_irqrestore(&adapter->lock, flags);
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}
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static void atlx_restore_vlan(struct atlx_adapter *adapter)
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{
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atlx_vlan_mode(adapter->netdev, adapter->netdev->features);
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}
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static netdev_features_t atlx_fix_features(struct net_device *netdev,
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netdev_features_t features)
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{
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/*
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* Since there is no support for separate rx/tx vlan accel
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* enable/disable make sure tx flag is always in same state as rx.
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*/
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if (features & NETIF_F_HW_VLAN_CTAG_RX)
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features |= NETIF_F_HW_VLAN_CTAG_TX;
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else
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features &= ~NETIF_F_HW_VLAN_CTAG_TX;
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return features;
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}
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static int atlx_set_features(struct net_device *netdev,
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netdev_features_t features)
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{
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netdev_features_t changed = netdev->features ^ features;
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if (changed & NETIF_F_HW_VLAN_CTAG_RX)
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atlx_vlan_mode(netdev, features);
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return 0;
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}
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#endif /* ATLX_C */
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