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
  88         atlx_set_mac_addr(&adapter->hw);
  89         return 0;
  90 }
  91
  92 static void atlx_check_for_link(struct atlx_adapter *adapter)
  93 {
  94         struct net_device *netdev = adapter->netdev;
  95         u16 phy_data = 0;
  96
  97         spin_lock(&adapter->lock);
  98         adapter->phy_timer_pending = false;
  99         atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 100         atlx_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
 101         spin_unlock(&adapter->lock);
 102
 103         /* notify upper layer link down ASAP */
 104         if (!(phy_data & BMSR_LSTATUS)) {
 105                 /* Link Down */
 106                 if (netif_carrier_ok(netdev)) {
 107                         /* old link state: Up */
 108                         dev_info(&adapter->pdev->dev, "%s link is down\n",
 109                                 netdev->name);
 110                         adapter->link_speed = SPEED_0;
 111                         netif_carrier_off(netdev);
 112                 }
 113         }
 114         schedule_work(&adapter->link_chg_task);
 115 }
 116
 117 /**
 118  * atlx_set_multi - Multicast and Promiscuous mode set
 119  * @netdev: network interface device structure
 120  *
 121  * The set_multi entry point is called whenever the multicast address
 122  * list or the network interface flags are updated.  This routine is
 123  * responsible for configuring the hardware for proper multicast,
 124  * promiscuous mode, and all-multi behavior.
 125  */
 126 static void atlx_set_multi(struct net_device *netdev)
 127 {
 128         struct atlx_adapter *adapter = netdev_priv(netdev);
 129         struct atlx_hw *hw = &adapter->hw;
 130         struct netdev_hw_addr *ha;
 131         u32 rctl;
 132         u32 hash_value;
 133
 134         /* Check for Promiscuous and All Multicast modes */
 135         rctl = ioread32(hw->hw_addr + REG_MAC_CTRL);
 136         if (netdev->flags & IFF_PROMISC)
 137                 rctl |= MAC_CTRL_PROMIS_EN;
 138         else if (netdev->flags & IFF_ALLMULTI) {
 139                 rctl |= MAC_CTRL_MC_ALL_EN;
 140                 rctl &= ~MAC_CTRL_PROMIS_EN;
 141         } else
 142                 rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
 143
 144         iowrite32(rctl, hw->hw_addr + REG_MAC_CTRL);
 145
 146         /* clear the old settings from the multicast hash table */
 147         iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
 148         iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
 149
 150         /* compute mc addresses' hash value ,and put it into hash table */
 151         netdev_for_each_mc_addr(ha, netdev) {
 152                 hash_value = atlx_hash_mc_addr(hw, ha->addr);
 153                 atlx_hash_set(hw, hash_value);
 154         }
 155 }
 156
 157 static inline void atlx_imr_set(struct atlx_adapter *adapter,
 158                                 unsigned int imr)
 159 {
 160         iowrite32(imr, adapter->hw.hw_addr + REG_IMR);
 161         ioread32(adapter->hw.hw_addr + REG_IMR);
 162 }
 163
 164 /**
 165  * atlx_irq_enable - Enable default interrupt generation settings
 166  * @adapter: board private structure
 167  */
 168 static void atlx_irq_enable(struct atlx_adapter *adapter)
 169 {
 170         atlx_imr_set(adapter, IMR_NORMAL_MASK);
 171         adapter->int_enabled = true;
 172 }
 173
 174 /**
 175  * atlx_irq_disable - Mask off interrupt generation on the NIC
 176  * @adapter: board private structure
 177  */
 178 static void atlx_irq_disable(struct atlx_adapter *adapter)
 179 {
 180         adapter->int_enabled = false;
 181         atlx_imr_set(adapter, 0);
 182         synchronize_irq(adapter->pdev->irq);
 183 }
 184
 185 static void atlx_clear_phy_int(struct atlx_adapter *adapter)
 186 {
 187         u16 phy_data;
 188         unsigned long flags;
 189
 190         spin_lock_irqsave(&adapter->lock, flags);
 191         atlx_read_phy_reg(&adapter->hw, 19, &phy_data);
 192         spin_unlock_irqrestore(&adapter->lock, flags);
 193 }
 194
 195 /**
 196  * atlx_tx_timeout - Respond to a Tx Hang
 197  * @netdev: network interface device structure
 198  */
 199 static void atlx_tx_timeout(struct net_device *netdev)
 200 {
 201         struct atlx_adapter *adapter = netdev_priv(netdev);
 202         /* Do the reset outside of interrupt context */
 203         schedule_work(&adapter->reset_dev_task);
 204 }
 205
 206 /*
 207  * atlx_link_chg_task - deal with link change event Out of interrupt context
 208  */
 209 static void atlx_link_chg_task(struct work_struct *work)
 210 {
 211         struct atlx_adapter *adapter;
 212         unsigned long flags;
 213
 214         adapter = container_of(work, struct atlx_adapter, link_chg_task);
 215
 216         spin_lock_irqsave(&adapter->lock, flags);
 217         atlx_check_link(adapter);
 218         spin_unlock_irqrestore(&adapter->lock, flags);
 219 }
 220
 221 static void __atlx_vlan_mode(netdev_features_t features, u32 *ctrl)
 222 {
 223         if (features & NETIF_F_HW_VLAN_RX) {
 224                 /* enable VLAN tag insert/strip */
 225                 *ctrl |= MAC_CTRL_RMV_VLAN;
 226         } else {
 227                 /* disable VLAN tag insert/strip */
 228                 *ctrl &= ~MAC_CTRL_RMV_VLAN;
 229         }
 230 }
 231
 232 static void atlx_vlan_mode(struct net_device *netdev,
 233         netdev_features_t features)
 234 {
 235         struct atlx_adapter *adapter = netdev_priv(netdev);
 236         unsigned long flags;
 237         u32 ctrl;
 238
 239         spin_lock_irqsave(&adapter->lock, flags);
 240         /* atlx_irq_disable(adapter); FIXME: confirm/remove */
 241         ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL);
 242         __atlx_vlan_mode(features, &ctrl);
 243         iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL);
 244         /* atlx_irq_enable(adapter); FIXME */
 245         spin_unlock_irqrestore(&adapter->lock, flags);
 246 }
 247
 248 static void atlx_restore_vlan(struct atlx_adapter *adapter)
 249 {
 250         atlx_vlan_mode(adapter->netdev, adapter->netdev->features);
 251 }
 252
 253 static netdev_features_t atlx_fix_features(struct net_device *netdev,
 254         netdev_features_t features)
 255 {
 256         /*
 257          * Since there is no support for separate rx/tx vlan accel
 258          * enable/disable make sure tx flag is always in same state as rx.
 259          */
 260         if (features & NETIF_F_HW_VLAN_RX)
 261                 features |= NETIF_F_HW_VLAN_TX;
 262         else
 263                 features &= ~NETIF_F_HW_VLAN_TX;
 264
 265         return features;
 266 }
 267
 268 static int atlx_set_features(struct net_device *netdev,
 269         netdev_features_t features)
 270 {
 271         netdev_features_t changed = netdev->features ^ features;
 272
 273         if (changed & NETIF_F_HW_VLAN_RX)
 274                 atlx_vlan_mode(netdev, features);
 275
 276         return 0;
 277 }
 278
 279 #endif /* ATLX_C */