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 31 static s32 atlx_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data); 32 static u32 atlx_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr); 33 static void atlx_set_mac_addr(struct atl1_hw *hw); 34 35 static 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 42 static 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 */ 61 static 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 eth_hw_addr_set(netdev, addr->sa_data); 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 79 static 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 */ 113 static 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 } 143 144 static 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 */ 155 static 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 */ 165 static 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 } 171 172 static 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 */ 186 static 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 */ 196 static 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 } 207 208 static 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 } 218 219 static 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 } 234 235 static void atlx_restore_vlan(struct atlx_adapter *adapter) 236 { 237 atlx_vlan_mode(adapter->netdev, adapter->netdev->features); 238 } 239 240 static 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 } 254 255 static 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