LXR linux/drivers/net/ethernet/atheros/atlx/atlx.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/* atlx.c -- common functions for Attansic network drivers
   3 *
   4 * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
   5 * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
   6 * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
   7 * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   8 *
   9 * Derived from Intel e1000 driver
  10 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
  11 */
  12
  13/* Including this file like a header is a temporary hack, I promise. -- CHS */
  14#ifndef ATLX_C
  15#define ATLX_C
  16
  17#include <linux/device.h>
  18#include <linux/errno.h>
  19#include <linux/etherdevice.h>
  20#include <linux/if.h>
  21#include <linux/netdevice.h>
  22#include <linux/socket.h>
  23#include <linux/sockios.h>
  24#include <linux/spinlock.h>
  25#include <linux/string.h>
  26#include <linux/types.h>
  27#include <linux/workqueue.h>
  28
  29#include "atlx.h"
  30
  31static s32 atlx_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data);
  32static u32 atlx_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr);
  33static void atlx_set_mac_addr(struct atl1_hw *hw);
  34
  35static struct atlx_spi_flash_dev flash_table[] = {
  36/*      MFR_NAME  WRSR  READ  PRGM  WREN  WRDI  RDSR  RDID  SEC_ERS CHIP_ERS */
  37        {"Atmel", 0x00, 0x03, 0x02, 0x06, 0x04, 0x05, 0x15, 0x52,   0x62},
  38        {"SST",   0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0x90, 0x20,   0x60},
  39        {"ST",    0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0xAB, 0xD8,   0xC7},
  40};
  41
  42static int atlx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
  43{
  44        switch (cmd) {
  45        case SIOCGMIIPHY:
  46        case SIOCGMIIREG:
  47        case SIOCSMIIREG:
  48                return atlx_mii_ioctl(netdev, ifr, cmd);
  49        default:
  50                return -EOPNOTSUPP;
  51        }
  52}
  53
  54/**
  55 * atlx_set_mac - Change the Ethernet Address of the NIC
  56 * @netdev: network interface device structure
  57 * @p: pointer to an address structure
  58 *
  59 * Returns 0 on success, negative on failure
  60 */
  61static int atlx_set_mac(struct net_device *netdev, void *p)
  62{
  63        struct atlx_adapter *adapter = netdev_priv(netdev);
  64        struct sockaddr *addr = p;
  65
  66        if (netif_running(netdev))
  67                return -EBUSY;
  68
  69        if (!is_valid_ether_addr(addr->sa_data))
  70                return -EADDRNOTAVAIL;
  71
  72        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
  73        memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
  74
  75        atlx_set_mac_addr(&adapter->hw);
  76        return 0;
  77}
  78
  79static void atlx_check_for_link(struct atlx_adapter *adapter)
  80{
  81        struct net_device *netdev = adapter->netdev;
  82        u16 phy_data = 0;
  83
  84        spin_lock(&adapter->lock);
  85        adapter->phy_timer_pending = false;
  86        atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
  87        atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
  88        spin_unlock(&adapter->lock);
  89
  90        /* notify upper layer link down ASAP */
  91        if (!(phy_data & BMSR_LSTATUS)) {
  92                /* Link Down */
  93                if (netif_carrier_ok(netdev)) {
  94                        /* old link state: Up */
  95                        dev_info(&adapter->pdev->dev, "%s link is down\n",
  96                                netdev->name);
  97                        adapter->link_speed = SPEED_0;
  98                        netif_carrier_off(netdev);
  99                }
 100        }
 101        schedule_work(&adapter->link_chg_task);
 102}
 103
 104/**
 105 * atlx_set_multi - Multicast and Promiscuous mode set
 106 * @netdev: network interface device structure
 107 *
 108 * The set_multi entry point is called whenever the multicast address
 109 * list or the network interface flags are updated.  This routine is
 110 * responsible for configuring the hardware for proper multicast,
 111 * promiscuous mode, and all-multi behavior.
 112 */
 113static void atlx_set_multi(struct net_device *netdev)
 114{
 115        struct atlx_adapter *adapter = netdev_priv(netdev);
 116        struct atlx_hw *hw = &adapter->hw;
 117        struct netdev_hw_addr *ha;
 118        u32 rctl;
 119        u32 hash_value;
 120
 121        /* Check for Promiscuous and All Multicast modes */
 122        rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 123        if (netdev->flags & IFF_PROMISC)
 124                rctl |= MAC_CTRL_PROMIS_EN;
 125        else if (netdev->flags & IFF_ALLMULTI) {
 126                rctl |= MAC_CTRL_MC_ALL_EN;
 127                rctl &= ~MAC_CTRL_PROMIS_EN;
 128        } else
 129                rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 130
 131        iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 132
 133        /* clear the old settings from the multicast hash table */
 134        iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 135        iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 136
 137        /* compute mc addresses' hash value ,and put it into hash table */
 138        netdev_for_each_mc_addr(ha, netdev) {
 139                hash_value = atlx_hash_mc_addr(hw, ha->addr);
 140                atlx_hash_set(hw, hash_value);
 141        }
 142}
 143
 144static inline void atlx_imr_set(struct atlx_adapter *adapter,
 145                                unsigned int imr)
 146{
 147        iowrite32(imr, adapter->hw.hw_addr + REG_IMR);
 148        ioread32(adapter->hw.hw_addr + REG_IMR);
 149}
 150
 151/**
 152 * atlx_irq_enable - Enable default interrupt generation settings
 153 * @adapter: board private structure
 154 */
 155static void atlx_irq_enable(struct atlx_adapter *adapter)
 156{
 157        atlx_imr_set(adapter, IMR_NORMAL_MASK);
 158        adapter->int_enabled = true;
 159}
 160
 161/**
 162 * atlx_irq_disable - Mask off interrupt generation on the NIC
 163 * @adapter: board private structure
 164 */
 165static void atlx_irq_disable(struct atlx_adapter *adapter)
 166{
 167        adapter->int_enabled = false;
 168        atlx_imr_set(adapter, 0);
 169        synchronize_irq(adapter->pdev->irq);
 170}
 171
 172static void atlx_clear_phy_int(struct atlx_adapter *adapter)
 173{
 174        u16 phy_data;
 175        unsigned long flags;
 176
 177        spin_lock_irqsave(&adapter->lock, flags);
 178        atlx_read_phy_reg(&adapter->hw, 19, &phy_data);
 179        spin_unlock_irqrestore(&adapter->lock, flags);
 180}
 181
 182/**
 183 * atlx_tx_timeout - Respond to a Tx Hang
 184 * @netdev: network interface device structure
 185 */
 186static void atlx_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 187{
 188        struct atlx_adapter *adapter = netdev_priv(netdev);
 189        /* Do the reset outside of interrupt context */
 190        schedule_work(&adapter->reset_dev_task);
 191}
 192
 193/*
 194 * atlx_link_chg_task - deal with link change event Out of interrupt context
 195 */
 196static void atlx_link_chg_task(struct work_struct *work)
 197{
 198        struct atlx_adapter *adapter;
 199        unsigned long flags;
 200
 201        adapter = container_of(work, struct atlx_adapter, link_chg_task);
 202
 203        spin_lock_irqsave(&adapter->lock, flags);
 204        atlx_check_link(adapter);
 205        spin_unlock_irqrestore(&adapter->lock, flags);
 206}
 207
 208static void __atlx_vlan_mode(netdev_features_t features, u32 *ctrl)
 209{
 210        if (features & NETIF_F_HW_VLAN_CTAG_RX) {
 211                /* enable VLAN tag insert/strip */
 212                *ctrl |= MAC_CTRL_RMV_VLAN;
 213        } else {
 214                /* disable VLAN tag insert/strip */
 215                *ctrl &= ~MAC_CTRL_RMV_VLAN;
 216        }
 217}
 218
 219static void atlx_vlan_mode(struct net_device *netdev,
 220        netdev_features_t features)
 221{
 222        struct atlx_adapter *adapter = netdev_priv(netdev);
 223        unsigned long flags;
 224        u32 ctrl;
 225
 226        spin_lock_irqsave(&adapter->lock, flags);
 227        /* atlx_irq_disable(adapter); FIXME: confirm/remove */
 228        ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
 229        __atlx_vlan_mode(features, &ctrl);
 230        iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
 231        /* atlx_irq_enable(adapter); FIXME */
 232        spin_unlock_irqrestore(&adapter->lock, flags);
 233}
 234
 235static void atlx_restore_vlan(struct atlx_adapter *adapter)
 236{
 237        atlx_vlan_mode(adapter->netdev, adapter->netdev->features);
 238}
 239
 240static netdev_features_t atlx_fix_features(struct net_device *netdev,
 241        netdev_features_t features)
 242{
 243        /*
 244         * Since there is no support for separate rx/tx vlan accel
 245         * enable/disable make sure tx flag is always in same state as rx.
 246         */
 247        if (features & NETIF_F_HW_VLAN_CTAG_RX)
 248                features |= NETIF_F_HW_VLAN_CTAG_TX;
 249        else
 250                features &= ~NETIF_F_HW_VLAN_CTAG_TX;
 251
 252        return features;
 253}
 254
 255static int atlx_set_features(struct net_device *netdev,
 256        netdev_features_t features)
 257{
 258        netdev_features_t changed = netdev->features ^ features;
 259
 260        if (changed & NETIF_F_HW_VLAN_CTAG_RX)
 261                atlx_vlan_mode(netdev, features);
 262
 263        return 0;
 264}
 265
 266#endif /* ATLX_C */
 267