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_CTAG_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_CTAG_RX) 261 features |= NETIF_F_HW_VLAN_CTAG_TX; 262 else 263 features &= ~NETIF_F_HW_VLAN_CTAG_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_CTAG_RX) 274 atlx_vlan_mode(netdev, features); 275 276 return 0; 277 } 278 279 #endif /* ATLX_C */ 280