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

   1 /* atlx.c -- common functions for Attansic network drivers
   2  *
   3  * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
   4  * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
   5  * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
   6  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
   7  *
   8  * Derived from Intel e1000 driver
   9  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
  10  *
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License as published by the Free
  13  * Software Foundation; either version 2 of the License, or (at your option)
  14  * any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  19  * more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along with
  22  * this program; if not, write to the Free Software Foundation, Inc., 59
  23  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24  */
  25
  26 /* Including this file like a header is a temporary hack, I promise. -- CHS */
  27 #ifndef ATLX_C
  28 #define ATLX_C
  29
  30 #include <linux/device.h>
  31 #include <linux/errno.h>
  32 #include <linux/etherdevice.h>
  33 #include <linux/if.h>
  34 #include <linux/netdevice.h>
  35 #include <linux/socket.h>
  36 #include <linux/sockios.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/string.h>
  39 #include <linux/types.h>
  40 #include <linux/workqueue.h>
  41
  42 #include "atlx.h"
  43
  44 static s32 atlx_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data);
  45 static u32 atlx_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr);
  46 static void atlx_set_mac_addr(struct atl1_hw *hw);
  47
  48 static struct atlx_spi_flash_dev flash_table[] = {
  49 /*      MFR_NAME  WRSR  READ  PRGM  WREN  WRDI  RDSR  RDID  SEC_ERS CHIP_ERS */
  50         {"Atmel", 0x00, 0x03, 0x02, 0x06, 0x04, 0x05, 0x15, 0x52,   0x62},
  51         {"SST",   0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0x90, 0x20,   0x60},
  52         {"ST",    0x01, 0x03, 0x02, 0x06, 0x04, 0x05, 0xAB, 0xD8,   0xC7},
  53 };
  54
  55 static int atlx_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
  56 {
  57         switch (cmd) {
  58         case SIOCGMIIPHY:
  59         case SIOCGMIIREG:
  60         case SIOCSMIIREG:
  61                 return atlx_mii_ioctl(netdev, ifr, cmd);
  62         default:
  63                 return -EOPNOTSUPP;
  64         }
  65 }
  66
  67 /*
  68  * atlx_set_mac - Change the Ethernet Address of the NIC
  69  * @netdev: network interface device structure
  70  * @p: pointer to an address structure
  71  *
  72  * Returns 0 on success, negative on failure
  73  */
  74 static int atlx_set_mac(struct net_device *netdev, void *p)
  75 {
  76         struct atlx_adapter *adapter = netdev_priv(netdev);
  77         struct sockaddr *addr = p;
  78
  79         if (netif_running(netdev))
  80                 return -EBUSY;
  81
  82         if (!is_valid_ether_addr(addr->sa_data))
  83                 return -EADDRNOTAVAIL;
  84
  85         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
  86         memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
  87         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
  88
  89         atlx_set_mac_addr(&adapter->hw);
  90         return 0;
  91 }
  92
  93 static void atlx_check_for_link(struct atlx_adapter *adapter)
  94 {
  95         struct net_device *netdev = adapter->netdev;
  96         u16 phy_data = 0;
  97
  98         spin_lock(&adapter->lock);
  99         adapter->phy_timer_pending = false;
 100         atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 101         atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 102         spin_unlock(&adapter->lock);
 103
 104         /* notify upper layer link down ASAP */
 105         if (!(phy_data & BMSR_LSTATUS)) {
 106                 /* Link Down */
 107                 if (netif_carrier_ok(netdev)) {
 108                         /* old link state: Up */
 109                         dev_info(&adapter->pdev->dev, "%s link is down\n",
 110                                 netdev->name);
 111                         adapter->link_speed = SPEED_0;
 112                         netif_carrier_off(netdev);
 113                 }
 114         }
 115         schedule_work(&adapter->link_chg_task);
 116 }
 117
 118 /*
 119  * atlx_set_multi - Multicast and Promiscuous mode set
 120  * @netdev: network interface device structure
 121  *
 122  * The set_multi entry point is called whenever the multicast address
 123  * list or the network interface flags are updated.  This routine is
 124  * responsible for configuring the hardware for proper multicast,
 125  * promiscuous mode, and all-multi behavior.
 126  */
 127 static void atlx_set_multi(struct net_device *netdev)
 128 {
 129         struct atlx_adapter *adapter = netdev_priv(netdev);
 130         struct atlx_hw *hw = &adapter->hw;
 131         struct netdev_hw_addr *ha;
 132         u32 rctl;
 133         u32 hash_value;
 134
 135         /* Check for Promiscuous and All Multicast modes */
 136         rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 137         if (netdev->flags & IFF_PROMISC)
 138                 rctl |= MAC_CTRL_PROMIS_EN;
 139         else if (netdev->flags & IFF_ALLMULTI) {
 140                 rctl |= MAC_CTRL_MC_ALL_EN;
 141                 rctl &= ~MAC_CTRL_PROMIS_EN;
 142         } else
 143                 rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 144
 145         iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 146
 147         /* clear the old settings from the multicast hash table */
 148         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 149         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 150
 151         /* compute mc addresses' hash value ,and put it into hash table */
 152         netdev_for_each_mc_addr(ha, netdev) {
 153                 hash_value = atlx_hash_mc_addr(hw, ha->addr);
 154                 atlx_hash_set(hw, hash_value);
 155         }
 156 }
 157
 158 /*
 159  * atlx_irq_enable - Enable default interrupt generation settings
 160  * @adapter: board private structure
 161  */
 162 static void atlx_irq_enable(struct atlx_adapter *adapter)
 163 {
 164         iowrite32(IMR_NORMAL_MASK, adapter->hw.hw_addr + REG_IMR);
 165         ioread32(adapter->hw.hw_addr + REG_IMR);
 166 }
 167
 168 /*
 169  * atlx_irq_disable - Mask off interrupt generation on the NIC
 170  * @adapter: board private structure
 171  */
 172 static void atlx_irq_disable(struct atlx_adapter *adapter)
 173 {
 174         iowrite32(0, adapter->hw.hw_addr + REG_IMR);
 175         ioread32(adapter->hw.hw_addr + REG_IMR);
 176         synchronize_irq(adapter->pdev->irq);
 177 }
 178
 179 static void atlx_clear_phy_int(struct atlx_adapter *adapter)
 180 {
 181         u16 phy_data;
 182         unsigned long flags;
 183
 184         spin_lock_irqsave(&adapter->lock, flags);
 185         atlx_read_phy_reg(&adapter->hw, 19, &phy_data);
 186         spin_unlock_irqrestore(&adapter->lock, flags);
 187 }
 188
 189 /*
 190  * atlx_tx_timeout - Respond to a Tx Hang
 191  * @netdev: network interface device structure
 192  */
 193 static void atlx_tx_timeout(struct net_device *netdev)
 194 {
 195         struct atlx_adapter *adapter = netdev_priv(netdev);
 196         /* Do the reset outside of interrupt context */
 197         schedule_work(&adapter->reset_dev_task);
 198 }
 199
 200 /*
 201  * atlx_link_chg_task - deal with link change event Out of interrupt context
 202  */
 203 static void atlx_link_chg_task(struct work_struct *work)
 204 {
 205         struct atlx_adapter *adapter;
 206         unsigned long flags;
 207
 208         adapter = container_of(work, struct atlx_adapter, link_chg_task);
 209
 210         spin_lock_irqsave(&adapter->lock, flags);
 211         atlx_check_link(adapter);
 212         spin_unlock_irqrestore(&adapter->lock, flags);
 213 }
 214
 215 static void __atlx_vlan_mode(netdev_features_t features, u32 *ctrl)
 216 {
 217         if (features & NETIF_F_HW_VLAN_RX) {
 218                 /* enable VLAN tag insert/strip */
 219                 *ctrl |= MAC_CTRL_RMV_VLAN;
 220         } else {
 221                 /* disable VLAN tag insert/strip */
 222                 *ctrl &= ~MAC_CTRL_RMV_VLAN;
 223         }
 224 }
 225
 226 static void atlx_vlan_mode(struct net_device *netdev,
 227         netdev_features_t features)
 228 {
 229         struct atlx_adapter *adapter = netdev_priv(netdev);
 230         unsigned long flags;
 231         u32 ctrl;
 232
 233         spin_lock_irqsave(&adapter->lock, flags);
 234         /* atlx_irq_disable(adapter); FIXME: confirm/remove */
 235         ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
 236         __atlx_vlan_mode(features, &ctrl);
 237         iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
 238         /* atlx_irq_enable(adapter); FIXME */
 239         spin_unlock_irqrestore(&adapter->lock, flags);
 240 }
 241
 242 static void atlx_restore_vlan(struct atlx_adapter *adapter)
 243 {
 244         atlx_vlan_mode(adapter->netdev, adapter->netdev->features);
 245 }
 246
 247 static netdev_features_t atlx_fix_features(struct net_device *netdev,
 248         netdev_features_t features)
 249 {
 250         /*
 251          * Since there is no support for separate rx/tx vlan accel
 252          * enable/disable make sure tx flag is always in same state as rx.
 253          */
 254         if (features & NETIF_F_HW_VLAN_RX)
 255                 features |= NETIF_F_HW_VLAN_TX;
 256         else
 257                 features &= ~NETIF_F_HW_VLAN_TX;
 258
 259         return features;
 260 }
 261
 262 static int atlx_set_features(struct net_device *netdev,
 263         netdev_features_t features)
 264 {
 265         netdev_features_t changed = netdev->features ^ features;
 266
 267         if (changed & NETIF_F_HW_VLAN_RX)
 268                 atlx_vlan_mode(netdev, features);
 269
 270         return 0;
 271 }
 272
 273 #endif /* ATLX_C */