1 /* 2 drivers/net/ethernet/dec/tulip/pnic.c 3 4 Copyright 2000,2001 The Linux Kernel Team 5 Written/copyright 1994-2001 by Donald Becker. 6 7 This software may be used and distributed according to the terms 8 of the GNU General Public License, incorporated herein by reference. 9 10 Please submit bugs to http://bugzilla.kernel.org/ . 11 */ 12 13 #include <linux/interrupt.h> 14 #include <linux/kernel.h> 15 #include <linux/jiffies.h> 16 #include "tulip.h" 17 18 19 void pnic_do_nway(struct net_device *dev) 20 { 21 struct tulip_private *tp = netdev_priv(dev); 22 void __iomem *ioaddr = tp->base_addr; 23 u32 phy_reg = ioread32(ioaddr + 0xB8); 24 u32 new_csr6 = tp->csr6 & ~0x40C40200; 25 26 if (phy_reg & 0x78000000) { /* Ignore baseT4 */ 27 if (phy_reg & 0x20000000) dev->if_port = 5; 28 else if (phy_reg & 0x40000000) dev->if_port = 3; 29 else if (phy_reg & 0x10000000) dev->if_port = 4; 30 else if (phy_reg & 0x08000000) dev->if_port = 0; 31 tp->nwayset = 1; 32 new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000; 33 iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12); 34 if (dev->if_port & 1) 35 iowrite32(0x1F868, ioaddr + 0xB8); 36 if (phy_reg & 0x30000000) { 37 tp->full_duplex = 1; 38 new_csr6 |= 0x00000200; 39 } 40 if (tulip_debug > 1) 41 netdev_dbg(dev, "PNIC autonegotiated status %08x, %s\n", 42 phy_reg, medianame[dev->if_port]); 43 if (tp->csr6 != new_csr6) { 44 tp->csr6 = new_csr6; 45 /* Restart Tx */ 46 tulip_restart_rxtx(tp); 47 dev->trans_start = jiffies; 48 } 49 } 50 } 51 52 void pnic_lnk_change(struct net_device *dev, int csr5) 53 { 54 struct tulip_private *tp = netdev_priv(dev); 55 void __iomem *ioaddr = tp->base_addr; 56 int phy_reg = ioread32(ioaddr + 0xB8); 57 58 if (tulip_debug > 1) 59 netdev_dbg(dev, "PNIC link changed state %08x, CSR5 %08x\n", 60 phy_reg, csr5); 61 if (ioread32(ioaddr + CSR5) & TPLnkFail) { 62 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7); 63 /* If we use an external MII, then we mustn't use the 64 * internal negotiation. 65 */ 66 if (tulip_media_cap[dev->if_port] & MediaIsMII) 67 return; 68 if (! tp->nwayset || time_after(jiffies, dev_trans_start(dev) + 1*HZ)) { 69 tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff); 70 iowrite32(tp->csr6, ioaddr + CSR6); 71 iowrite32(0x30, ioaddr + CSR12); 72 iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */ 73 dev->trans_start = jiffies; 74 } 75 } else if (ioread32(ioaddr + CSR5) & TPLnkPass) { 76 if (tulip_media_cap[dev->if_port] & MediaIsMII) { 77 spin_lock(&tp->lock); 78 tulip_check_duplex(dev); 79 spin_unlock(&tp->lock); 80 } else { 81 pnic_do_nway(dev); 82 } 83 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7); 84 } 85 } 86 87 void pnic_timer(unsigned long data) 88 { 89 struct net_device *dev = (struct net_device *)data; 90 struct tulip_private *tp = netdev_priv(dev); 91 void __iomem *ioaddr = tp->base_addr; 92 int next_tick = 60*HZ; 93 94 if(!ioread32(ioaddr + CSR7)) { 95 /* the timer was called due to a work overflow 96 * in the interrupt handler. Skip the connection 97 * checks, the nic is definitively speaking with 98 * his link partner. 99 */ 100 goto too_good_connection; 101 } 102 103 if (tulip_media_cap[dev->if_port] & MediaIsMII) { 104 spin_lock_irq(&tp->lock); 105 if (tulip_check_duplex(dev) > 0) 106 next_tick = 3*HZ; 107 spin_unlock_irq(&tp->lock); 108 } else { 109 int csr12 = ioread32(ioaddr + CSR12); 110 int new_csr6 = tp->csr6 & ~0x40C40200; 111 int phy_reg = ioread32(ioaddr + 0xB8); 112 int csr5 = ioread32(ioaddr + CSR5); 113 114 if (tulip_debug > 1) 115 netdev_dbg(dev, "PNIC timer PHY status %08x, %s CSR5 %08x\n", 116 phy_reg, medianame[dev->if_port], csr5); 117 if (phy_reg & 0x04000000) { /* Remote link fault */ 118 iowrite32(0x0201F078, ioaddr + 0xB8); 119 next_tick = 1*HZ; 120 tp->nwayset = 0; 121 } else if (phy_reg & 0x78000000) { /* Ignore baseT4 */ 122 pnic_do_nway(dev); 123 next_tick = 60*HZ; 124 } else if (csr5 & TPLnkFail) { /* 100baseTx link beat */ 125 if (tulip_debug > 1) 126 netdev_dbg(dev, "%s link beat failed, CSR12 %04x, CSR5 %08x, PHY %03x\n", 127 medianame[dev->if_port], 128 csr12, 129 ioread32(ioaddr + CSR5), 130 ioread32(ioaddr + 0xB8)); 131 next_tick = 3*HZ; 132 if (tp->medialock) { 133 } else if (tp->nwayset && (dev->if_port & 1)) { 134 next_tick = 1*HZ; 135 } else if (dev->if_port == 0) { 136 dev->if_port = 3; 137 iowrite32(0x33, ioaddr + CSR12); 138 new_csr6 = 0x01860000; 139 iowrite32(0x1F868, ioaddr + 0xB8); 140 } else { 141 dev->if_port = 0; 142 iowrite32(0x32, ioaddr + CSR12); 143 new_csr6 = 0x00420000; 144 iowrite32(0x1F078, ioaddr + 0xB8); 145 } 146 if (tp->csr6 != new_csr6) { 147 tp->csr6 = new_csr6; 148 /* Restart Tx */ 149 tulip_restart_rxtx(tp); 150 dev->trans_start = jiffies; 151 if (tulip_debug > 1) 152 dev_info(&dev->dev, 153 "Changing PNIC configuration to %s %s-duplex, CSR6 %08x\n", 154 medianame[dev->if_port], 155 tp->full_duplex ? "full" : "half", 156 new_csr6); 157 } 158 } 159 } 160 too_good_connection: 161 mod_timer(&tp->timer, RUN_AT(next_tick)); 162 if(!ioread32(ioaddr + CSR7)) { 163 if (tulip_debug > 1) 164 dev_info(&dev->dev, "sw timer wakeup\n"); 165 disable_irq(dev->irq); 166 tulip_refill_rx(dev); 167 enable_irq(dev->irq); 168 iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7); 169 } 170 } 171