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 static inline void atlx_imr_set(struct atlx_adapter *adapter, 159 unsigned int imr) 160 { 161 iowrite32(imr, adapter->hw.hw_addr + REG_IMR); 162 ioread32(adapter->hw.hw_addr + REG_IMR); 163 } 164 165 /** 166 * atlx_irq_enable - Enable default interrupt generation settings 167 * @adapter: board private structure 168 */ 169 static void atlx_irq_enable(struct atlx_adapter *adapter) 170 { 171 atlx_imr_set(adapter, IMR_NORMAL_MASK); 172 adapter->int_enabled = true; 173 } 174 175 /** 176 * atlx_irq_disable - Mask off interrupt generation on the NIC 177 * @adapter: board private structure 178 */ 179 static void atlx_irq_disable(struct atlx_adapter *adapter) 180 { 181 adapter->int_enabled = false; 182 atlx_imr_set(adapter, 0); 183 synchronize_irq(adapter->pdev->irq); 184 } 185 186 static void atlx_clear_phy_int(struct atlx_adapter *adapter) 187 { 188 u16 phy_data; 189 unsigned long flags; 190 191 spin_lock_irqsave(&adapter->lock, flags); 192 atlx_read_phy_reg(&adapter->hw, 19, &phy_data); 193 spin_unlock_irqrestore(&adapter->lock, flags); 194 } 195 196 /** 197 * atlx_tx_timeout - Respond to a Tx Hang 198 * @netdev: network interface device structure 199 */ 200 static void atlx_tx_timeout(struct net_device *netdev) 201 { 202 struct atlx_adapter *adapter = netdev_priv(netdev); 203 /* Do the reset outside of interrupt context */ 204 schedule_work(&adapter->reset_dev_task); 205 } 206 207 /* 208 * atlx_link_chg_task - deal with link change event Out of interrupt context 209 */ 210 static void atlx_link_chg_task(struct work_struct *work) 211 { 212 struct atlx_adapter *adapter; 213 unsigned long flags; 214 215 adapter = container_of(work, struct atlx_adapter, link_chg_task); 216 217 spin_lock_irqsave(&adapter->lock, flags); 218 atlx_check_link(adapter); 219 spin_unlock_irqrestore(&adapter->lock, flags); 220 } 221 222 static void __atlx_vlan_mode(netdev_features_t features, u32 *ctrl) 223 { 224 if (features & NETIF_F_HW_VLAN_RX) { 225 /* enable VLAN tag insert/strip */ 226 *ctrl |= MAC_CTRL_RMV_VLAN; 227 } else { 228 /* disable VLAN tag insert/strip */ 229 *ctrl &= ~MAC_CTRL_RMV_VLAN; 230 } 231 } 232 233 static void atlx_vlan_mode(struct net_device *netdev, 234 netdev_features_t features) 235 { 236 struct atlx_adapter *adapter = netdev_priv(netdev); 237 unsigned long flags; 238 u32 ctrl; 239 240 spin_lock_irqsave(&adapter->lock, flags); 241 /* atlx_irq_disable(adapter); FIXME: confirm/remove */ 242 ctrl = ioread32(adapter->hw.hw_addr + REG_MAC_CTRL); 243 __atlx_vlan_mode(features, &ctrl); 244 iowrite32(ctrl, adapter->hw.hw_addr + REG_MAC_CTRL); 245 /* atlx_irq_enable(adapter); FIXME */ 246 spin_unlock_irqrestore(&adapter->lock, flags); 247 } 248 249 static void atlx_restore_vlan(struct atlx_adapter *adapter) 250 { 251 atlx_vlan_mode(adapter->netdev, adapter->netdev->features); 252 } 253 254 static netdev_features_t atlx_fix_features(struct net_device *netdev, 255 netdev_features_t features) 256 { 257 /* 258 * Since there is no support for separate rx/tx vlan accel 259 * enable/disable make sure tx flag is always in same state as rx. 260 */ 261 if (features & NETIF_F_HW_VLAN_RX) 262 features |= NETIF_F_HW_VLAN_TX; 263 else 264 features &= ~NETIF_F_HW_VLAN_TX; 265 266 return features; 267 } 268 269 static int atlx_set_features(struct net_device *netdev, 270 netdev_features_t features) 271 { 272 netdev_features_t changed = netdev->features ^ features; 273 274 if (changed & NETIF_F_HW_VLAN_RX) 275 atlx_vlan_mode(netdev, features); 276 277 return 0; 278 } 279 280 #endif /* ATLX_C */ 281