| /* |
| drivers/net/tulip/pnic2.c |
| |
| Copyright 2000,2001 The Linux Kernel Team |
| Written/copyright 1994-2001 by Donald Becker. |
| Modified to hep support PNIC_II by Kevin B. Hendricks |
| |
| This software may be used and distributed according to the terms |
| of the GNU General Public License, incorporated herein by reference. |
| |
| Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html} |
| for more information on this driver. |
| |
| Please submit bugs to http://bugzilla.kernel.org/ . |
| */ |
| |
| |
| /* Understanding the PNIC_II - everything is this file is based |
| * on the PNIC_II_PDF datasheet which is sorely lacking in detail |
| * |
| * As I understand things, here are the registers and bits that |
| * explain the masks and constants used in this file that are |
| * either different from the 21142/3 or important for basic operation. |
| * |
| * |
| * CSR 6 (mask = 0xfe3bd1fd of bits not to change) |
| * ----- |
| * Bit 24 - SCR |
| * Bit 23 - PCS |
| * Bit 22 - TTM (Trasmit Threshold Mode) |
| * Bit 18 - Port Select |
| * Bit 13 - Start - 1, Stop - 0 Transmissions |
| * Bit 11:10 - Loop Back Operation Mode |
| * Bit 9 - Full Duplex mode (Advertise 10BaseT-FD is CSR14<7> is set) |
| * Bit 1 - Start - 1, Stop - 0 Receive |
| * |
| * |
| * CSR 14 (mask = 0xfff0ee39 of bits not to change) |
| * ------ |
| * Bit 19 - PAUSE-Pause |
| * Bit 18 - Advertise T4 |
| * Bit 17 - Advertise 100baseTx-FD |
| * Bit 16 - Advertise 100baseTx-HD |
| * Bit 12 - LTE - Link Test Enable |
| * Bit 7 - ANE - Auto Negotiate Enable |
| * Bit 6 - HDE - Advertise 10baseT-HD |
| * Bit 2 - Reset to Power down - kept as 1 for normal operation |
| * Bit 1 - Loop Back enable for 10baseT MCC |
| * |
| * |
| * CSR 12 |
| * ------ |
| * Bit 25 - Partner can do T4 |
| * Bit 24 - Partner can do 100baseTx-FD |
| * Bit 23 - Partner can do 100baseTx-HD |
| * Bit 22 - Partner can do 10baseT-FD |
| * Bit 21 - Partner can do 10baseT-HD |
| * Bit 15 - LPN is 1 if all above bits are valid other wise 0 |
| * Bit 14:12 - autonegotiation state (write 001 to start autonegotiate) |
| * Bit 3 - Autopolarity state |
| * Bit 2 - LS10B - link state of 10baseT 0 - good, 1 - failed |
| * Bit 1 - LS100B - link state of 100baseT 0 - good, 1- faild |
| * |
| * |
| * Data Port Selection Info |
| *------------------------- |
| * |
| * CSR14<7> CSR6<18> CSR6<22> CSR6<23> CSR6<24> MODE/PORT |
| * 1 0 0 (X) 0 (X) 1 NWAY |
| * 0 0 1 0 (X) 0 10baseT |
| * 0 1 0 1 1 (X) 100baseT |
| * |
| * |
| */ |
| |
| |
| |
| #include "tulip.h" |
| #include <linux/delay.h> |
| |
| |
| void pnic2_timer(unsigned long data) |
| { |
| struct net_device *dev = (struct net_device *)data; |
| struct tulip_private *tp = netdev_priv(dev); |
| void __iomem *ioaddr = tp->base_addr; |
| int next_tick = 60*HZ; |
| |
| if (tulip_debug > 3) |
| dev_info(&dev->dev, "PNIC2 negotiation status %08x\n", |
| ioread32(ioaddr + CSR12)); |
| |
| if (next_tick) { |
| mod_timer(&tp->timer, RUN_AT(next_tick)); |
| } |
| } |
| |
| |
| void pnic2_start_nway(struct net_device *dev) |
| { |
| struct tulip_private *tp = netdev_priv(dev); |
| void __iomem *ioaddr = tp->base_addr; |
| int csr14; |
| int csr12; |
| |
| /* set up what to advertise during the negotiation */ |
| |
| /* load in csr14 and mask off bits not to touch |
| * comment at top of file explains mask value |
| */ |
| csr14 = (ioread32(ioaddr + CSR14) & 0xfff0ee39); |
| |
| /* bit 17 - advetise 100baseTx-FD */ |
| if (tp->sym_advertise & 0x0100) csr14 |= 0x00020000; |
| |
| /* bit 16 - advertise 100baseTx-HD */ |
| if (tp->sym_advertise & 0x0080) csr14 |= 0x00010000; |
| |
| /* bit 6 - advertise 10baseT-HD */ |
| if (tp->sym_advertise & 0x0020) csr14 |= 0x00000040; |
| |
| /* Now set bit 12 Link Test Enable, Bit 7 Autonegotiation Enable |
| * and bit 0 Don't PowerDown 10baseT |
| */ |
| csr14 |= 0x00001184; |
| |
| if (tulip_debug > 1) |
| printk(KERN_DEBUG "%s: Restarting PNIC2 autonegotiation, csr14=%08x\n", |
| dev->name, csr14); |
| |
| /* tell pnic2_lnk_change we are doing an nway negotiation */ |
| dev->if_port = 0; |
| tp->nway = tp->mediasense = 1; |
| tp->nwayset = tp->lpar = 0; |
| |
| /* now we have to set up csr6 for NWAY state */ |
| |
| tp->csr6 = ioread32(ioaddr + CSR6); |
| if (tulip_debug > 1) |
| printk(KERN_DEBUG "%s: On Entry to Nway, csr6=%08x\n", |
| dev->name, tp->csr6); |
| |
| /* mask off any bits not to touch |
| * comment at top of file explains mask value |
| */ |
| tp->csr6 = tp->csr6 & 0xfe3bd1fd; |
| |
| /* don't forget that bit 9 is also used for advertising */ |
| /* advertise 10baseT-FD for the negotiation (bit 9) */ |
| if (tp->sym_advertise & 0x0040) tp->csr6 |= 0x00000200; |
| |
| /* set bit 24 for nway negotiation mode ... |
| * see Data Port Selection comment at top of file |
| * and "Stop" - reset both Transmit (bit 13) and Receive (bit 1) |
| */ |
| tp->csr6 |= 0x01000000; |
| iowrite32(csr14, ioaddr + CSR14); |
| iowrite32(tp->csr6, ioaddr + CSR6); |
| udelay(100); |
| |
| /* all set up so now force the negotiation to begin */ |
| |
| /* read in current values and mask off all but the |
| * Autonegotiation bits 14:12. Writing a 001 to those bits |
| * should start the autonegotiation |
| */ |
| csr12 = (ioread32(ioaddr + CSR12) & 0xffff8fff); |
| csr12 |= 0x1000; |
| iowrite32(csr12, ioaddr + CSR12); |
| } |
| |
| |
| |
| void pnic2_lnk_change(struct net_device *dev, int csr5) |
| { |
| struct tulip_private *tp = netdev_priv(dev); |
| void __iomem *ioaddr = tp->base_addr; |
| int csr14; |
| |
| /* read the staus register to find out what is up */ |
| int csr12 = ioread32(ioaddr + CSR12); |
| |
| if (tulip_debug > 1) |
| dev_info(&dev->dev, |
| "PNIC2 link status interrupt %08x, CSR5 %x, %08x\n", |
| csr12, csr5, ioread32(ioaddr + CSR14)); |
| |
| /* If NWay finished and we have a negotiated partner capability. |
| * check bits 14:12 for bit pattern 101 - all is good |
| */ |
| if (tp->nway && !tp->nwayset) { |
| |
| /* we did an auto negotiation */ |
| |
| if ((csr12 & 0x7000) == 0x5000) { |
| |
| /* negotiation ended successfully */ |
| |
| /* get the link partners reply and mask out all but |
| * bits 24-21 which show the partners capabilities |
| * and match those to what we advertised |
| * |
| * then begin to interpret the results of the negotiation. |
| * Always go in this order : (we are ignoring T4 for now) |
| * 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD |
| */ |
| |
| int negotiated = ((csr12 >> 16) & 0x01E0) & tp->sym_advertise; |
| tp->lpar = (csr12 >> 16); |
| tp->nwayset = 1; |
| |
| if (negotiated & 0x0100) dev->if_port = 5; |
| else if (negotiated & 0x0080) dev->if_port = 3; |
| else if (negotiated & 0x0040) dev->if_port = 4; |
| else if (negotiated & 0x0020) dev->if_port = 0; |
| else { |
| if (tulip_debug > 1) |
| dev_info(&dev->dev, |
| "funny autonegotiate result csr12 %08x advertising %04x\n", |
| csr12, tp->sym_advertise); |
| tp->nwayset = 0; |
| /* so check if 100baseTx link state is okay */ |
| if ((csr12 & 2) == 0 && (tp->sym_advertise & 0x0180)) |
| dev->if_port = 3; |
| } |
| |
| /* now record the duplex that was negotiated */ |
| tp->full_duplex = 0; |
| if ((dev->if_port == 4) || (dev->if_port == 5)) |
| tp->full_duplex = 1; |
| |
| if (tulip_debug > 1) { |
| if (tp->nwayset) |
| dev_info(&dev->dev, |
| "Switching to %s based on link negotiation %04x & %04x = %04x\n", |
| medianame[dev->if_port], |
| tp->sym_advertise, tp->lpar, |
| negotiated); |
| } |
| |
| /* remember to turn off bit 7 - autonegotiate |
| * enable so we can properly end nway mode and |
| * set duplex (ie. use csr6<9> again) |
| */ |
| csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); |
| iowrite32(csr14,ioaddr + CSR14); |
| |
| |
| /* now set the data port and operating mode |
| * (see the Data Port Selection comments at |
| * the top of the file |
| */ |
| |
| /* get current csr6 and mask off bits not to touch */ |
| /* see comment at top of file */ |
| |
| tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); |
| |
| /* so if using if_port 3 or 5 then select the 100baseT |
| * port else select the 10baseT port. |
| * See the Data Port Selection table at the top |
| * of the file which was taken from the PNIC_II.PDF |
| * datasheet |
| */ |
| if (dev->if_port & 1) tp->csr6 |= 0x01840000; |
| else tp->csr6 |= 0x00400000; |
| |
| /* now set the full duplex bit appropriately */ |
| if (tp->full_duplex) tp->csr6 |= 0x00000200; |
| |
| iowrite32(1, ioaddr + CSR13); |
| |
| if (tulip_debug > 2) |
| printk(KERN_DEBUG "%s: Setting CSR6 %08x/%x CSR12 %08x\n", |
| dev->name, tp->csr6, |
| ioread32(ioaddr + CSR6), ioread32(ioaddr + CSR12)); |
| |
| /* now the following actually writes out the |
| * new csr6 values |
| */ |
| tulip_start_rxtx(tp); |
| |
| return; |
| |
| } else { |
| dev_info(&dev->dev, |
| "Autonegotiation failed, using %s, link beat status %04x\n", |
| medianame[dev->if_port], csr12); |
| |
| /* remember to turn off bit 7 - autonegotiate |
| * enable so we don't forget |
| */ |
| csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); |
| iowrite32(csr14,ioaddr + CSR14); |
| |
| /* what should we do when autonegotiate fails? |
| * should we try again or default to baseline |
| * case. I just don't know. |
| * |
| * for now default to some baseline case |
| */ |
| |
| dev->if_port = 0; |
| tp->nway = 0; |
| tp->nwayset = 1; |
| |
| /* set to 10baseTx-HD - see Data Port Selection |
| * comment given at the top of the file |
| */ |
| tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); |
| tp->csr6 |= 0x00400000; |
| |
| tulip_restart_rxtx(tp); |
| |
| return; |
| |
| } |
| } |
| |
| if ((tp->nwayset && (csr5 & 0x08000000) && |
| (dev->if_port == 3 || dev->if_port == 5) && |
| (csr12 & 2) == 2) || (tp->nway && (csr5 & (TPLnkFail)))) { |
| |
| /* Link blew? Maybe restart NWay. */ |
| |
| if (tulip_debug > 2) |
| printk(KERN_DEBUG "%s: Ugh! Link blew?\n", dev->name); |
| |
| del_timer_sync(&tp->timer); |
| pnic2_start_nway(dev); |
| tp->timer.expires = RUN_AT(3*HZ); |
| add_timer(&tp->timer); |
| |
| return; |
| } |
| |
| |
| if (dev->if_port == 3 || dev->if_port == 5) { |
| |
| /* we are at 100mb and a potential link change occurred */ |
| |
| if (tulip_debug > 1) |
| dev_info(&dev->dev, "PNIC2 %s link beat %s\n", |
| medianame[dev->if_port], |
| (csr12 & 2) ? "failed" : "good"); |
| |
| /* check 100 link beat */ |
| |
| tp->nway = 0; |
| tp->nwayset = 1; |
| |
| /* if failed then try doing an nway to get in sync */ |
| if ((csr12 & 2) && ! tp->medialock) { |
| del_timer_sync(&tp->timer); |
| pnic2_start_nway(dev); |
| tp->timer.expires = RUN_AT(3*HZ); |
| add_timer(&tp->timer); |
| } |
| |
| return; |
| } |
| |
| if (dev->if_port == 0 || dev->if_port == 4) { |
| |
| /* we are at 10mb and a potential link change occurred */ |
| |
| if (tulip_debug > 1) |
| dev_info(&dev->dev, "PNIC2 %s link beat %s\n", |
| medianame[dev->if_port], |
| (csr12 & 4) ? "failed" : "good"); |
| |
| |
| tp->nway = 0; |
| tp->nwayset = 1; |
| |
| /* if failed, try doing an nway to get in sync */ |
| if ((csr12 & 4) && ! tp->medialock) { |
| del_timer_sync(&tp->timer); |
| pnic2_start_nway(dev); |
| tp->timer.expires = RUN_AT(3*HZ); |
| add_timer(&tp->timer); |
| } |
| |
| return; |
| } |
| |
| |
| if (tulip_debug > 1) |
| dev_info(&dev->dev, "PNIC2 Link Change Default?\n"); |
| |
| /* if all else fails default to trying 10baseT-HD */ |
| dev->if_port = 0; |
| |
| /* make sure autonegotiate enable is off */ |
| csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); |
| iowrite32(csr14,ioaddr + CSR14); |
| |
| /* set to 10baseTx-HD - see Data Port Selection |
| * comment given at the top of the file |
| */ |
| tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); |
| tp->csr6 |= 0x00400000; |
| |
| tulip_restart_rxtx(tp); |
| } |
| |
