summaryrefslogtreecommitdiff
path: root/drivers/net/tokenring/ibmtr.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/tokenring/ibmtr.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/net/tokenring/ibmtr.c')
-rw-r--r--drivers/net/tokenring/ibmtr.c1987
1 files changed, 1987 insertions, 0 deletions
diff --git a/drivers/net/tokenring/ibmtr.c b/drivers/net/tokenring/ibmtr.c
new file mode 100644
index 000000000000..c098863bdd9d
--- /dev/null
+++ b/drivers/net/tokenring/ibmtr.c
@@ -0,0 +1,1987 @@
+/* ibmtr.c: A shared-memory IBM Token Ring 16/4 driver for linux
+ *
+ * Written 1993 by Mark Swanson and Peter De Schrijver.
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * This device driver should work with Any IBM Token Ring Card that does
+ * not use DMA.
+ *
+ * I used Donald Becker's (becker@scyld.com) device driver work
+ * as a base for most of my initial work.
+ *
+ * Changes by Peter De Schrijver
+ * (Peter.Deschrijver@linux.cc.kuleuven.ac.be) :
+ *
+ * + changed name to ibmtr.c in anticipation of other tr boards.
+ * + changed reset code and adapter open code.
+ * + added SAP open code.
+ * + a first attempt to write interrupt, transmit and receive routines.
+ *
+ * Changes by David W. Morris (dwm@shell.portal.com) :
+ * 941003 dwm: - Restructure tok_probe for multiple adapters, devices.
+ * + Add comments, misc reorg for clarity.
+ * + Flatten interrupt handler levels.
+ *
+ * Changes by Farzad Farid (farzy@zen.via.ecp.fr)
+ * and Pascal Andre (andre@chimay.via.ecp.fr) (March 9 1995) :
+ * + multi ring support clean up.
+ * + RFC1042 compliance enhanced.
+ *
+ * Changes by Pascal Andre (andre@chimay.via.ecp.fr) (September 7 1995) :
+ * + bug correction in tr_tx
+ * + removed redundant information display
+ * + some code reworking
+ *
+ * Changes by Michel Lespinasse (walken@via.ecp.fr),
+ * Yann Doussot (doussot@via.ecp.fr) and Pascal Andre (andre@via.ecp.fr)
+ * (February 18, 1996) :
+ * + modified shared memory and mmio access port the driver to
+ * alpha platform (structure access -> readb/writeb)
+ *
+ * Changes by Steve Kipisz (bungy@ibm.net or kipisz@vnet.ibm.com)
+ * (January 18 1996):
+ * + swapped WWOR and WWCR in ibmtr.h
+ * + moved some init code from tok_probe into trdev_init. The
+ * PCMCIA code can call trdev_init to complete initializing
+ * the driver.
+ * + added -DPCMCIA to support PCMCIA
+ * + detecting PCMCIA Card Removal in interrupt handler. If
+ * ISRP is FF, then a PCMCIA card has been removed
+ * 10/2000 Burt needed a new method to avoid crashing the OS
+ *
+ * Changes by Paul Norton (pnorton@cts.com) :
+ * + restructured the READ.LOG logic to prevent the transmit SRB
+ * from being rudely overwritten before the transmit cycle is
+ * complete. (August 15 1996)
+ * + completed multiple adapter support. (November 20 1996)
+ * + implemented csum_partial_copy in tr_rx and increased receive
+ * buffer size and count. Minor fixes. (March 15, 1997)
+ *
+ * Changes by Christopher Turcksin <wabbit@rtfc.demon.co.uk>
+ * + Now compiles ok as a module again.
+ *
+ * Changes by Paul Norton (pnorton@ieee.org) :
+ * + moved the header manipulation code in tr_tx and tr_rx to
+ * net/802/tr.c. (July 12 1997)
+ * + add retry and timeout on open if cable disconnected. (May 5 1998)
+ * + lifted 2000 byte mtu limit. now depends on shared-RAM size.
+ * May 25 1998)
+ * + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998)
+ *
+ * Changes by Joel Sloan (jjs@c-me.com) :
+ * + disable verbose debug messages by default - to enable verbose
+ * debugging, edit the IBMTR_DEBUG_MESSAGES define below
+ *
+ * Changes by Mike Phillips <phillim@amtrak.com> :
+ * + Added extra #ifdef's to work with new PCMCIA Token Ring Code.
+ * The PCMCIA code now just sets up the card so it can be recognized
+ * by ibmtr_probe. Also checks allocated memory vs. on-board memory
+ * for correct figure to use.
+ *
+ * Changes by Tim Hockin (thockin@isunix.it.ilstu.edu) :
+ * + added spinlocks for SMP sanity (10 March 1999)
+ *
+ * Changes by Jochen Friedrich to enable RFC1469 Option 2 multicasting
+ * i.e. using functional address C0 00 00 04 00 00 to transmit and
+ * receive multicast packets.
+ *
+ * Changes by Mike Sullivan (based on original sram patch by Dave Grothe
+ * to support windowing into on adapter shared ram.
+ * i.e. Use LANAID to setup a PnP configuration with 16K RAM. Paging
+ * will shift this 16K window over the entire available shared RAM.
+ *
+ * Changes by Peter De Schrijver (p2@mind.be) :
+ * + fixed a problem with PCMCIA card removal
+ *
+ * Change by Mike Sullivan et al.:
+ * + added turbo card support. No need to use lanaid to configure
+ * the adapter into isa compatiblity mode.
+ *
+ * Changes by Burt Silverman to allow the computer to behave nicely when
+ * a cable is pulled or not in place, or a PCMCIA card is removed hot.
+ */
+
+/* change the define of IBMTR_DEBUG_MESSAGES to a nonzero value
+in the event that chatty debug messages are desired - jjs 12/30/98 */
+
+#define IBMTR_DEBUG_MESSAGES 0
+
+#include <linux/module.h>
+
+#ifdef PCMCIA /* required for ibmtr_cs.c to build */
+#undef MODULE /* yes, really */
+#undef ENABLE_PAGING
+#else
+#define ENABLE_PAGING 1
+#endif
+
+#define FALSE 0
+#define TRUE (!FALSE)
+
+/* changes the output format of driver initialization */
+#define TR_VERBOSE 0
+
+/* some 95 OS send many non UI frame; this allow removing the warning */
+#define TR_FILTERNONUI 1
+
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/ip.h>
+#include <linux/trdevice.h>
+#include <linux/ibmtr.h>
+
+#include <net/checksum.h>
+
+#include <asm/io.h>
+
+#define DPRINTK(format, args...) printk("%s: " format, dev->name , ## args)
+#define DPRINTD(format, args...) DummyCall("%s: " format, dev->name , ## args)
+
+/* version and credits */
+#ifndef PCMCIA
+static char version[] __initdata =
+ "\nibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n"
+ " v2.1.125 10/20/98 Paul Norton <pnorton@ieee.org>\n"
+ " v2.2.0 12/30/98 Joel Sloan <jjs@c-me.com>\n"
+ " v2.2.1 02/08/00 Mike Sullivan <sullivam@us.ibm.com>\n"
+ " v2.2.2 07/27/00 Burt Silverman <burts@us.ibm.com>\n"
+ " v2.4.0 03/01/01 Mike Sullivan <sullivan@us.ibm.com>\n";
+#endif
+
+/* this allows displaying full adapter information */
+
+char *channel_def[] __devinitdata = { "ISA", "MCA", "ISA P&P" };
+
+static char pcchannelid[] __devinitdata = {
+ 0x05, 0x00, 0x04, 0x09,
+ 0x04, 0x03, 0x04, 0x0f,
+ 0x03, 0x06, 0x03, 0x01,
+ 0x03, 0x01, 0x03, 0x00,
+ 0x03, 0x09, 0x03, 0x09,
+ 0x03, 0x00, 0x02, 0x00
+};
+
+static char mcchannelid[] __devinitdata = {
+ 0x04, 0x0d, 0x04, 0x01,
+ 0x05, 0x02, 0x05, 0x03,
+ 0x03, 0x06, 0x03, 0x03,
+ 0x05, 0x08, 0x03, 0x04,
+ 0x03, 0x05, 0x03, 0x01,
+ 0x03, 0x08, 0x02, 0x00
+};
+
+char __devinit *adapter_def(char type)
+{
+ switch (type) {
+ case 0xF: return "PC Adapter | PC Adapter II | Adapter/A";
+ case 0xE: return "16/4 Adapter | 16/4 Adapter/A (long)";
+ case 0xD: return "16/4 Adapter/A (short) | 16/4 ISA-16 Adapter";
+ case 0xC: return "Auto 16/4 Adapter";
+ default: return "adapter (unknown type)";
+ };
+};
+
+#define TRC_INIT 0x01 /* Trace initialization & PROBEs */
+#define TRC_INITV 0x02 /* verbose init trace points */
+unsigned char ibmtr_debug_trace = 0;
+
+static int ibmtr_probe(struct net_device *dev);
+static int ibmtr_probe1(struct net_device *dev, int ioaddr);
+static unsigned char get_sram_size(struct tok_info *adapt_info);
+static int trdev_init(struct net_device *dev);
+static int tok_open(struct net_device *dev);
+static int tok_init_card(struct net_device *dev);
+void tok_open_adapter(unsigned long dev_addr);
+static void open_sap(unsigned char type, struct net_device *dev);
+static void tok_set_multicast_list(struct net_device *dev);
+static int tok_send_packet(struct sk_buff *skb, struct net_device *dev);
+static int tok_close(struct net_device *dev);
+irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static void initial_tok_int(struct net_device *dev);
+static void tr_tx(struct net_device *dev);
+static void tr_rx(struct net_device *dev);
+void ibmtr_reset_timer(struct timer_list*tmr,struct net_device *dev);
+static void tok_rerun(unsigned long dev_addr);
+void ibmtr_readlog(struct net_device *dev);
+static struct net_device_stats *tok_get_stats(struct net_device *dev);
+int ibmtr_change_mtu(struct net_device *dev, int mtu);
+static void find_turbo_adapters(int *iolist);
+
+static int ibmtr_portlist[IBMTR_MAX_ADAPTERS+1] __devinitdata = {
+ 0xa20, 0xa24, 0, 0, 0
+};
+static int __devinitdata turbo_io[IBMTR_MAX_ADAPTERS] = {0};
+static int __devinitdata turbo_irq[IBMTR_MAX_ADAPTERS] = {0};
+static int __devinitdata turbo_searched = 0;
+
+#ifndef PCMCIA
+static __u32 ibmtr_mem_base __initdata = 0xd0000;
+#endif
+
+static void __devinit PrtChanID(char *pcid, short stride)
+{
+ short i, j;
+ for (i = 0, j = 0; i < 24; i++, j += stride)
+ printk("%1x", ((int) pcid[j]) & 0x0f);
+ printk("\n");
+}
+
+static void __devinit HWPrtChanID(void __iomem *pcid, short stride)
+{
+ short i, j;
+ for (i = 0, j = 0; i < 24; i++, j += stride)
+ printk("%1x", ((int) readb(pcid + j)) & 0x0f);
+ printk("\n");
+}
+
+/* We have to ioremap every checked address, because isa_readb is
+ * going away.
+ */
+
+static void __devinit find_turbo_adapters(int *iolist)
+{
+ int ram_addr;
+ int index=0;
+ void __iomem *chanid;
+ int found_turbo=0;
+ unsigned char *tchanid, ctemp;
+ int i, j;
+ unsigned long jif;
+ void __iomem *ram_mapped ;
+
+ if (turbo_searched == 1) return;
+ turbo_searched=1;
+ for (ram_addr=0xC0000; ram_addr < 0xE0000; ram_addr+=0x2000) {
+
+ __u32 intf_tbl=0;
+
+ found_turbo=1;
+ ram_mapped = ioremap((u32)ram_addr,0x1fff) ;
+ if (ram_mapped==NULL)
+ continue ;
+ chanid=(CHANNEL_ID + ram_mapped);
+ tchanid=pcchannelid;
+ ctemp=readb(chanid) & 0x0f;
+ if (ctemp != *tchanid) continue;
+ for (i=2,j=1; i<=46; i=i+2,j++) {
+ if ((readb(chanid+i) & 0x0f) != tchanid[j]){
+ found_turbo=0;
+ break;
+ }
+ }
+ if (!found_turbo) continue;
+
+ writeb(0x90, ram_mapped+0x1E01);
+ for(i=2; i<0x0f; i++) {
+ writeb(0x00, ram_mapped+0x1E01+i);
+ }
+ writeb(0x00, ram_mapped+0x1E01);
+ for(jif=jiffies+TR_BUSY_INTERVAL; time_before_eq(jiffies,jif););
+ intf_tbl=ntohs(readw(ram_mapped+ACA_OFFSET+ACA_RW+WRBR_EVEN));
+ if (intf_tbl) {
+#if IBMTR_DEBUG_MESSAGES
+ printk("ibmtr::find_turbo_adapters, Turbo found at "
+ "ram_addr %x\n",ram_addr);
+ printk("ibmtr::find_turbo_adapters, interface_table ");
+ for(i=0; i<6; i++) {
+ printk("%x:",readb(ram_addr+intf_tbl+i));
+ }
+ printk("\n");
+#endif
+ turbo_io[index]=ntohs(readw(ram_mapped+intf_tbl+4));
+ turbo_irq[index]=readb(ram_mapped+intf_tbl+3);
+ outb(0, turbo_io[index] + ADAPTRESET);
+ for(jif=jiffies+TR_RST_TIME;time_before_eq(jiffies,jif););
+ outb(0, turbo_io[index] + ADAPTRESETREL);
+ index++;
+ continue;
+ }
+#if IBMTR_DEBUG_MESSAGES
+ printk("ibmtr::find_turbo_adapters, ibmtr card found at"
+ " %x but not a Turbo model\n",ram_addr);
+#endif
+ iounmap(ram_mapped) ;
+ } /* for */
+ for(i=0; i<IBMTR_MAX_ADAPTERS; i++) {
+ if(!turbo_io[i]) break;
+ for (j=0; j<IBMTR_MAX_ADAPTERS; j++) {
+ if ( iolist[j] && iolist[j] != turbo_io[i]) continue;
+ iolist[j]=turbo_io[i];
+ break;
+ }
+ }
+}
+
+static void ibmtr_cleanup_card(struct net_device *dev)
+{
+ if (dev->base_addr) {
+ outb(0,dev->base_addr+ADAPTRESET);
+
+ schedule_timeout(TR_RST_TIME); /* wait 50ms */
+
+ outb(0,dev->base_addr+ADAPTRESETREL);
+ }
+
+#ifndef PCMCIA
+ free_irq(dev->irq, dev);
+ release_region(dev->base_addr, IBMTR_IO_EXTENT);
+
+ {
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+ iounmap(ti->mmio);
+ iounmap(ti->sram_virt);
+ }
+#endif
+}
+
+int ibmtr_probe_card(struct net_device *dev)
+{
+ int err = ibmtr_probe(dev);
+ if (!err) {
+ err = register_netdev(dev);
+ if (err)
+ ibmtr_cleanup_card(dev);
+ }
+ return err;
+}
+
+/****************************************************************************
+ * ibmtr_probe(): Routine specified in the network device structure
+ * to probe for an IBM Token Ring Adapter. Routine outline:
+ * I. Interrogate hardware to determine if an adapter exists
+ * and what the speeds and feeds are
+ * II. Setup data structures to control execution based upon
+ * adapter characteristics.
+ *
+ * We expect ibmtr_probe to be called once for each device entry
+ * which references it.
+ ****************************************************************************/
+
+static int ibmtr_probe(struct net_device *dev)
+{
+ int i;
+ int base_addr = dev->base_addr;
+
+ if (base_addr && base_addr <= 0x1ff) /* Don't probe at all. */
+ return -ENXIO;
+ if (base_addr > 0x1ff) { /* Check a single specified location. */
+ if (!ibmtr_probe1(dev, base_addr)) return 0;
+ return -ENODEV;
+ }
+ find_turbo_adapters(ibmtr_portlist);
+ for (i = 0; ibmtr_portlist[i]; i++) {
+ int ioaddr = ibmtr_portlist[i];
+
+ if (!ibmtr_probe1(dev, ioaddr)) return 0;
+ }
+ return -ENODEV;
+}
+
+/*****************************************************************************/
+
+static int __devinit ibmtr_probe1(struct net_device *dev, int PIOaddr)
+{
+
+ unsigned char segment, intr=0, irq=0, i, j, cardpresent=NOTOK, temp=0;
+ void __iomem * t_mmio = NULL;
+ struct tok_info *ti = dev->priv;
+ void __iomem *cd_chanid;
+ unsigned char *tchanid, ctemp;
+#ifndef PCMCIA
+ unsigned char t_irq=0;
+ unsigned long timeout;
+ static int version_printed;
+#endif
+
+ /* Query the adapter PIO base port which will return
+ * indication of where MMIO was placed. We also have a
+ * coded interrupt number.
+ */
+ segment = inb(PIOaddr);
+ if (segment < 0x40 || segment > 0xe0) {
+ /* Out of range values so we'll assume non-existent IO device
+ * but this is not necessarily a problem, esp if a turbo
+ * adapter is being used. */
+#if IBMTR_DEBUG_MESSAGES
+ DPRINTK("ibmtr_probe1(): unhappy that inb(0x%X) == 0x%X, "
+ "Hardware Problem?\n",PIOaddr,segment);
+#endif
+ return -ENODEV;
+ }
+ /*
+ * Compute the linear base address of the MMIO area
+ * as LINUX doesn't care about segments
+ */
+ t_mmio = ioremap(((__u32) (segment & 0xfc) << 11) + 0x80000,2048);
+ if (!t_mmio) {
+ DPRINTK("Cannot remap mmiobase memory area") ;
+ return -ENODEV ;
+ }
+ intr = segment & 0x03; /* low bits is coded interrupt # */
+ if (ibmtr_debug_trace & TRC_INIT)
+ DPRINTK("PIOaddr: %4hx seg/intr: %2x mmio base: %p intr: %d\n"
+ , PIOaddr, (int) segment, t_mmio, (int) intr);
+
+ /*
+ * Now we will compare expected 'channelid' strings with
+ * what we is there to learn of ISA/MCA or not TR card
+ */
+#ifdef PCMCIA
+ iounmap(t_mmio);
+ t_mmio = ti->mmio; /*BMS to get virtual address */
+ irq = ti->irq; /*BMS to display the irq! */
+#endif
+ cd_chanid = (CHANNEL_ID + t_mmio); /* for efficiency */
+ tchanid = pcchannelid;
+ cardpresent = TR_ISA; /* try ISA */
+
+ /* Suboptimize knowing first byte different */
+ ctemp = readb(cd_chanid) & 0x0f;
+ if (ctemp != *tchanid) { /* NOT ISA card, try MCA */
+ tchanid = mcchannelid;
+ cardpresent = TR_MCA;
+ if (ctemp != *tchanid) /* Neither ISA nor MCA */
+ cardpresent = NOTOK;
+ }
+ if (cardpresent != NOTOK) {
+ /* Know presumed type, try rest of ID */
+ for (i = 2, j = 1; i <= 46; i = i + 2, j++) {
+ if( (readb(cd_chanid+i)&0x0f) == tchanid[j]) continue;
+ /* match failed, not TR card */
+ cardpresent = NOTOK;
+ break;
+ }
+ }
+ /*
+ * If we have an ISA board check for the ISA P&P version,
+ * as it has different IRQ settings
+ */
+ if (cardpresent == TR_ISA && (readb(AIPFID + t_mmio) == 0x0e))
+ cardpresent = TR_ISAPNP;
+ if (cardpresent == NOTOK) { /* "channel_id" did not match, report */
+ if (!(ibmtr_debug_trace & TRC_INIT)) {
+#ifndef PCMCIA
+ iounmap(t_mmio);
+#endif
+ return -ENODEV;
+ }
+ DPRINTK( "Channel ID string not found for PIOaddr: %4hx\n",
+ PIOaddr);
+ DPRINTK("Expected for ISA: ");
+ PrtChanID(pcchannelid, 1);
+ DPRINTK(" found: ");
+/* BMS Note that this can be misleading, when hardware is flaky, because you
+ are reading it a second time here. So with my flaky hardware, I'll see my-
+ self in this block, with the HW ID matching the ISA ID exactly! */
+ HWPrtChanID(cd_chanid, 2);
+ DPRINTK("Expected for MCA: ");
+ PrtChanID(mcchannelid, 1);
+ }
+ /* Now, setup some of the pl0 buffers for this driver.. */
+ /* If called from PCMCIA, it is already set up, so no need to
+ waste the memory, just use the existing structure */
+#ifndef PCMCIA
+ ti->mmio = t_mmio;
+ for (i = 0; i < IBMTR_MAX_ADAPTERS; i++) {
+ if (turbo_io[i] != PIOaddr)
+ continue;
+#if IBMTR_DEBUG_MESSAGES
+ printk("ibmtr::tr_probe1, setting PIOaddr %x to Turbo\n",
+ PIOaddr);
+#endif
+ ti->turbo = 1;
+ t_irq = turbo_irq[i];
+ }
+#endif /* !PCMCIA */
+ ti->readlog_pending = 0;
+ init_waitqueue_head(&ti->wait_for_reset);
+
+ /* if PCMCIA, the card can be recognized as either TR_ISA or TR_ISAPNP
+ * depending which card is inserted. */
+
+#ifndef PCMCIA
+ switch (cardpresent) {
+ case TR_ISA:
+ if (intr == 0) irq = 9; /* irq2 really is irq9 */
+ if (intr == 1) irq = 3;
+ if (intr == 2) irq = 6;
+ if (intr == 3) irq = 7;
+ ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
+ break;
+ case TR_MCA:
+ if (intr == 0) irq = 9;
+ if (intr == 1) irq = 3;
+ if (intr == 2) irq = 10;
+ if (intr == 3) irq = 11;
+ ti->global_int_enable = 0;
+ ti->adapter_int_enable = 0;
+ ti->sram_phys=(__u32)(inb(PIOaddr+ADAPTRESETREL) & 0xfe) << 12;
+ break;
+ case TR_ISAPNP:
+ if (!t_irq) {
+ if (intr == 0) irq = 9;
+ if (intr == 1) irq = 3;
+ if (intr == 2) irq = 10;
+ if (intr == 3) irq = 11;
+ } else
+ irq=t_irq;
+ timeout = jiffies + TR_SPIN_INTERVAL;
+ while (!readb(ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN)){
+ if (!time_after(jiffies, timeout)) continue;
+ DPRINTK( "Hardware timeout during initialization.\n");
+ iounmap(t_mmio);
+ kfree(ti);
+ return -ENODEV;
+ }
+ ti->sram_phys =
+ ((__u32)readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_EVEN)<<12);
+ ti->adapter_int_enable = PIOaddr + ADAPTINTREL;
+ break;
+ } /*end switch (cardpresent) */
+#endif /*not PCMCIA */
+
+ if (ibmtr_debug_trace & TRC_INIT) { /* just report int */
+ DPRINTK("irq=%d", irq);
+ printk(", sram_phys=0x%x", ti->sram_phys);
+ if(ibmtr_debug_trace&TRC_INITV){ /* full chat in verbose only */
+ DPRINTK(", ti->mmio=%p", ti->mmio);
+ printk(", segment=%02X", segment);
+ }
+ printk(".\n");
+ }
+
+ /* Get hw address of token ring card */
+ j = 0;
+ for (i = 0; i < 0x18; i = i + 2) {
+ /* technical reference states to do this */
+ temp = readb(ti->mmio + AIP + i) & 0x0f;
+ ti->hw_address[j] = temp;
+ if (j & 1)
+ dev->dev_addr[(j / 2)] =
+ ti->hw_address[j]+ (ti->hw_address[j - 1] << 4);
+ ++j;
+ }
+ /* get Adapter type: 'F' = Adapter/A, 'E' = 16/4 Adapter II,... */
+ ti->adapter_type = readb(ti->mmio + AIPADAPTYPE);
+
+ /* get Data Rate: F=4Mb, E=16Mb, D=4Mb & 16Mb ?? */
+ ti->data_rate = readb(ti->mmio + AIPDATARATE);
+
+ /* Get Early Token Release support?: F=no, E=4Mb, D=16Mb, C=4&16Mb */
+ ti->token_release = readb(ti->mmio + AIPEARLYTOKEN);
+
+ /* How much shared RAM is on adapter ? */
+ if (ti->turbo) {
+ ti->avail_shared_ram=127;
+ } else {
+ ti->avail_shared_ram = get_sram_size(ti);/*in 512 byte units */
+ }
+ /* We need to set or do a bunch of work here based on previous results*/
+ /* Support paging? What sizes?: F=no, E=16k, D=32k, C=16 & 32k */
+ ti->shared_ram_paging = readb(ti->mmio + AIPSHRAMPAGE);
+
+ /* Available DHB 4Mb size: F=2048, E=4096, D=4464 */
+ switch (readb(ti->mmio + AIP4MBDHB)) {
+ case 0xe: ti->dhb_size4mb = 4096; break;
+ case 0xd: ti->dhb_size4mb = 4464; break;
+ default: ti->dhb_size4mb = 2048; break;
+ }
+
+ /* Available DHB 16Mb size: F=2048, E=4096, D=8192, C=16384, B=17960 */
+ switch (readb(ti->mmio + AIP16MBDHB)) {
+ case 0xe: ti->dhb_size16mb = 4096; break;
+ case 0xd: ti->dhb_size16mb = 8192; break;
+ case 0xc: ti->dhb_size16mb = 16384; break;
+ case 0xb: ti->dhb_size16mb = 17960; break;
+ default: ti->dhb_size16mb = 2048; break;
+ }
+
+ /* We must figure out how much shared memory space this adapter
+ * will occupy so that if there are two adapters we can fit both
+ * in. Given a choice, we will limit this adapter to 32K. The
+ * maximum space will will use for two adapters is 64K so if the
+ * adapter we are working on demands 64K (it also doesn't support
+ * paging), then only one adapter can be supported.
+ */
+
+ /*
+ * determine how much of total RAM is mapped into PC space
+ */
+ ti->mapped_ram_size= /*sixteen to onehundredtwentyeight 512byte blocks*/
+ 1<< ((readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03) + 4);
+ ti->page_mask = 0;
+ if (ti->turbo) ti->page_mask=0xf0;
+ else if (ti->shared_ram_paging == 0xf); /* No paging in adapter */
+ else {
+#ifdef ENABLE_PAGING
+ unsigned char pg_size = 0;
+ /* BMS: page size: PCMCIA, use configuration register;
+ ISAPNP, use LANAIDC config tool from www.ibm.com */
+ switch (ti->shared_ram_paging) {
+ case 0xf:
+ break;
+ case 0xe:
+ ti->page_mask = (ti->mapped_ram_size == 32) ? 0xc0 : 0;
+ pg_size = 32; /* 16KB page size */
+ break;
+ case 0xd:
+ ti->page_mask = (ti->mapped_ram_size == 64) ? 0x80 : 0;
+ pg_size = 64; /* 32KB page size */
+ break;
+ case 0xc:
+ switch (ti->mapped_ram_size) {
+ case 32:
+ ti->page_mask = 0xc0;
+ pg_size = 32;
+ break;
+ case 64:
+ ti->page_mask = 0x80;
+ pg_size = 64;
+ break;
+ }
+ break;
+ default:
+ DPRINTK("Unknown shared ram paging info %01X\n",
+ ti->shared_ram_paging);
+ iounmap(t_mmio);
+ kfree(ti);
+ return -ENODEV;
+ break;
+ } /*end switch shared_ram_paging */
+
+ if (ibmtr_debug_trace & TRC_INIT)
+ DPRINTK("Shared RAM paging code: %02X, "
+ "mapped RAM size: %dK, shared RAM size: %dK, "
+ "page mask: %02X\n:",
+ ti->shared_ram_paging, ti->mapped_ram_size / 2,
+ ti->avail_shared_ram / 2, ti->page_mask);
+#endif /*ENABLE_PAGING */
+ }
+
+#ifndef PCMCIA
+ /* finish figuring the shared RAM address */
+ if (cardpresent == TR_ISA) {
+ static __u32 ram_bndry_mask[] =
+ { 0xffffe000, 0xffffc000, 0xffff8000, 0xffff0000 };
+ __u32 new_base, rrr_32, chk_base, rbm;
+
+ rrr_32=readb(ti->mmio+ACA_OFFSET+ACA_RW+RRR_ODD) >> 2 & 0x03;
+ rbm = ram_bndry_mask[rrr_32];
+ new_base = (ibmtr_mem_base + (~rbm)) & rbm;/* up to boundary */
+ chk_base = new_base + (ti->mapped_ram_size << 9);
+ if (chk_base > (ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE)) {
+ DPRINTK("Shared RAM for this adapter (%05x) exceeds "
+ "driver limit (%05x), adapter not started.\n",
+ chk_base, ibmtr_mem_base + IBMTR_SHARED_RAM_SIZE);
+ iounmap(t_mmio);
+ kfree(ti);
+ return -ENODEV;
+ } else { /* seems cool, record what we have figured out */
+ ti->sram_base = new_base >> 12;
+ ibmtr_mem_base = chk_base;
+ }
+ }
+ else ti->sram_base = ti->sram_phys >> 12;
+
+ /* The PCMCIA has already got the interrupt line and the io port,
+ so no chance of anybody else getting it - MLP */
+ if (request_irq(dev->irq = irq, &tok_interrupt, 0, "ibmtr", dev) != 0) {
+ DPRINTK("Could not grab irq %d. Halting Token Ring driver.\n",
+ irq);
+ iounmap(t_mmio);
+ kfree(ti);
+ return -ENODEV;
+ }
+ /*?? Now, allocate some of the PIO PORTs for this driver.. */
+ /* record PIOaddr range as busy */
+ if (!request_region(PIOaddr, IBMTR_IO_EXTENT, "ibmtr")) {
+ DPRINTK("Could not grab PIO range. Halting driver.\n");
+ free_irq(dev->irq, dev);
+ iounmap(t_mmio);
+ kfree(ti);
+ return -EBUSY;
+ }
+
+ if (!version_printed++) {
+ printk(version);
+ }
+#endif /* !PCMCIA */
+ DPRINTK("%s %s found\n",
+ channel_def[cardpresent - 1], adapter_def(ti->adapter_type));
+ DPRINTK("using irq %d, PIOaddr %hx, %dK shared RAM.\n",
+ irq, PIOaddr, ti->mapped_ram_size / 2);
+ DPRINTK("Hardware address : %02X:%02X:%02X:%02X:%02X:%02X\n",
+ dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+ dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
+ if (ti->page_mask)
+ DPRINTK("Shared RAM paging enabled. "
+ "Page size: %uK Shared Ram size %dK\n",
+ ((ti->page_mask^0xff)+1) >>2, ti->avail_shared_ram / 2);
+ else
+ DPRINTK("Shared RAM paging disabled. ti->page_mask %x\n",
+ ti->page_mask);
+
+ /* Calculate the maximum DHB we can use */
+ /* two cases where avail_shared_ram doesn't equal mapped_ram_size:
+ 1. avail_shared_ram is 127 but mapped_ram_size is 128 (typical)
+ 2. user has configured adapter for less than avail_shared_ram
+ but is not using paging (she should use paging, I believe)
+ */
+ if (!ti->page_mask) {
+ ti->avail_shared_ram=
+ min(ti->mapped_ram_size,ti->avail_shared_ram);
+ }
+
+ switch (ti->avail_shared_ram) {
+ case 16: /* 8KB shared RAM */
+ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)2048);
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4=2;
+ ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)2048);
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16=2;
+ break;
+ case 32: /* 16KB shared RAM */
+ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4=4;
+ ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)4096);
+ ti->rbuf_len16 = 1032; /*1024 usable */
+ ti->rbuf_cnt16=4;
+ break;
+ case 64: /* 32KB shared RAM */
+ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4=6;
+ ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)10240);
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16=6;
+ break;
+ case 127: /* 63.5KB shared RAM */
+ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4=6;
+ ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)16384);
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16=16;
+ break;
+ case 128: /* 64KB shared RAM */
+ ti->dhb_size4mb = min(ti->dhb_size4mb, (unsigned short)4464);
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4=6;
+ ti->dhb_size16mb = min(ti->dhb_size16mb, (unsigned short)17960);
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16=16;
+ break;
+ default:
+ ti->dhb_size4mb = 2048;
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4=2;
+ ti->dhb_size16mb = 2048;
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16=2;
+ break;
+ }
+ /* this formula is not smart enough for the paging case
+ ti->rbuf_cnt<x> = (ti->avail_shared_ram * BLOCKSZ - ADAPT_PRIVATE -
+ ARBLENGTH - SSBLENGTH - DLC_MAX_SAP * SAPLENGTH -
+ DLC_MAX_STA * STALENGTH - ti->dhb_size<x>mb * NUM_DHB -
+ SRBLENGTH - ASBLENGTH) / ti->rbuf_len<x>;
+ */
+ ti->maxmtu16 = (ti->rbuf_len16 - 8) * ti->rbuf_cnt16 - TR_HLEN;
+ ti->maxmtu4 = (ti->rbuf_len4 - 8) * ti->rbuf_cnt4 - TR_HLEN;
+ /*BMS assuming 18 bytes of Routing Information (usually works) */
+ DPRINTK("Maximum Receive Internet Protocol MTU 16Mbps: %d, 4Mbps: %d\n",
+ ti->maxmtu16, ti->maxmtu4);
+
+ dev->base_addr = PIOaddr; /* set the value for device */
+ dev->mem_start = ti->sram_base << 12;
+ dev->mem_end = dev->mem_start + (ti->mapped_ram_size << 9) - 1;
+ trdev_init(dev);
+ return 0; /* Return 0 to indicate we have found a Token Ring card. */
+} /*ibmtr_probe1() */
+
+/*****************************************************************************/
+
+/* query the adapter for the size of shared RAM */
+/* the function returns the RAM size in units of 512 bytes */
+
+static unsigned char __devinit get_sram_size(struct tok_info *adapt_info)
+{
+ unsigned char avail_sram_code;
+ static unsigned char size_code[] = { 0, 16, 32, 64, 127, 128 };
+ /* Adapter gives
+ 'F' -- use RRR bits 3,2
+ 'E' -- 8kb 'D' -- 16kb
+ 'C' -- 32kb 'A' -- 64KB
+ 'B' - 64KB less 512 bytes at top
+ (WARNING ... must zero top bytes in INIT */
+
+ avail_sram_code = 0xf - readb(adapt_info->mmio + AIPAVAILSHRAM);
+ if (avail_sram_code) return size_code[avail_sram_code];
+ else /* for code 'F', must compute size from RRR(3,2) bits */
+ return 1 <<
+ ((readb(adapt_info->mmio+ACA_OFFSET+ACA_RW+RRR_ODD)>>2&3)+4);
+}
+
+/*****************************************************************************/
+
+static int __devinit trdev_init(struct net_device *dev)
+{
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+
+ SET_PAGE(ti->srb_page);
+ ti->open_failure = NO ;
+ dev->open = tok_open;
+ dev->stop = tok_close;
+ dev->hard_start_xmit = tok_send_packet;
+ dev->get_stats = tok_get_stats;
+ dev->set_multicast_list = tok_set_multicast_list;
+ dev->change_mtu = ibmtr_change_mtu;
+
+ return 0;
+}
+
+/*****************************************************************************/
+
+static int tok_init_card(struct net_device *dev)
+{
+ struct tok_info *ti;
+ short PIOaddr;
+ unsigned long i;
+
+ PIOaddr = dev->base_addr;
+ ti = (struct tok_info *) dev->priv;
+ /* Special processing for first interrupt after reset */
+ ti->do_tok_int = FIRST_INT;
+ /* Reset adapter */
+ writeb(~INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
+ outb(0, PIOaddr + ADAPTRESET);
+
+ current->state=TASK_UNINTERRUPTIBLE;
+ schedule_timeout(TR_RST_TIME); /* wait 50ms */
+
+ outb(0, PIOaddr + ADAPTRESETREL);
+#ifdef ENABLE_PAGING
+ if (ti->page_mask)
+ writeb(SRPR_ENABLE_PAGING,ti->mmio+ACA_OFFSET+ACA_RW+SRPR_EVEN);
+#endif
+ writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
+ i = sleep_on_timeout(&ti->wait_for_reset, 4 * HZ);
+ return i? 0 : -EAGAIN;
+}
+
+/*****************************************************************************/
+static int tok_open(struct net_device *dev)
+{
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+ int i;
+
+ /*the case we were left in a failure state during a previous open */
+ if (ti->open_failure == YES) {
+ DPRINTK("Last time you were disconnected, how about now?\n");
+ printk("You can't insert with an ICS connector half-cocked.\n");
+ }
+
+ ti->open_status = CLOSED; /* CLOSED or OPEN */
+ ti->sap_status = CLOSED; /* CLOSED or OPEN */
+ ti->open_failure = NO; /* NO or YES */
+ ti->open_mode = MANUAL; /* MANUAL or AUTOMATIC */
+ /* 12/2000 not typical Linux, but we can use RUNNING to let us know when
+ the network has crapped out or cables are disconnected. Useful because
+ the IFF_UP flag stays up the whole time, until ifconfig tr0 down.
+ */
+ dev->flags &= ~IFF_RUNNING;
+
+ ti->sram_phys &= ~1; /* to reverse what we do in tok_close */
+ /* init the spinlock */
+ spin_lock_init(&ti->lock);
+ init_timer(&ti->tr_timer);
+
+ i = tok_init_card(dev);
+ if (i) return i;
+
+ while (1){
+ tok_open_adapter((unsigned long) dev);
+ i= interruptible_sleep_on_timeout(&ti->wait_for_reset, 25 * HZ);
+ /* sig catch: estimate opening adapter takes more than .5 sec*/
+ if (i>(245*HZ)/10) break; /* fancier than if (i==25*HZ) */
+ if (i==0) break;
+ if (ti->open_status == OPEN && ti->sap_status==OPEN) {
+ netif_start_queue(dev);
+ DPRINTK("Adapter is up and running\n");
+ return 0;
+ }
+ current->state=TASK_INTERRUPTIBLE;
+ i=schedule_timeout(TR_RETRY_INTERVAL); /* wait 30 seconds */
+ if(i!=0) break; /*prob. a signal, like the i>24*HZ case above */
+ }
+ outb(0, dev->base_addr + ADAPTRESET);/* kill pending interrupts*/
+ DPRINTK("TERMINATED via signal\n"); /*BMS useful */
+ return -EAGAIN;
+}
+
+/*****************************************************************************/
+
+#define COMMAND_OFST 0
+#define OPEN_OPTIONS_OFST 8
+#define NUM_RCV_BUF_OFST 24
+#define RCV_BUF_LEN_OFST 26
+#define DHB_LENGTH_OFST 28
+#define NUM_DHB_OFST 30
+#define DLC_MAX_SAP_OFST 32
+#define DLC_MAX_STA_OFST 33
+
+void tok_open_adapter(unsigned long dev_addr)
+{
+ struct net_device *dev = (struct net_device *) dev_addr;
+ struct tok_info *ti;
+ int i;
+
+ ti = (struct tok_info *) dev->priv;
+ SET_PAGE(ti->init_srb_page);
+ writeb(~SRB_RESP_INT, ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_ODD);
+ for (i = 0; i < sizeof(struct dir_open_adapter); i++)
+ writeb(0, ti->init_srb + i);
+ writeb(DIR_OPEN_ADAPTER, ti->init_srb + COMMAND_OFST);
+ writew(htons(OPEN_PASS_BCON_MAC), ti->init_srb + OPEN_OPTIONS_OFST);
+ if (ti->ring_speed == 16) {
+ writew(htons(ti->dhb_size16mb), ti->init_srb + DHB_LENGTH_OFST);
+ writew(htons(ti->rbuf_cnt16), ti->init_srb + NUM_RCV_BUF_OFST);
+ writew(htons(ti->rbuf_len16), ti->init_srb + RCV_BUF_LEN_OFST);
+ } else {
+ writew(htons(ti->dhb_size4mb), ti->init_srb + DHB_LENGTH_OFST);
+ writew(htons(ti->rbuf_cnt4), ti->init_srb + NUM_RCV_BUF_OFST);
+ writew(htons(ti->rbuf_len4), ti->init_srb + RCV_BUF_LEN_OFST);
+ }
+ writeb(NUM_DHB, /* always 2 */ ti->init_srb + NUM_DHB_OFST);
+ writeb(DLC_MAX_SAP, ti->init_srb + DLC_MAX_SAP_OFST);
+ writeb(DLC_MAX_STA, ti->init_srb + DLC_MAX_STA_OFST);
+ ti->srb = ti->init_srb; /* We use this one in the interrupt handler */
+ ti->srb_page = ti->init_srb_page;
+ DPRINTK("Opening adapter: Xmit bfrs: %d X %d, Rcv bfrs: %d X %d\n",
+ readb(ti->init_srb + NUM_DHB_OFST),
+ ntohs(readw(ti->init_srb + DHB_LENGTH_OFST)),
+ ntohs(readw(ti->init_srb + NUM_RCV_BUF_OFST)),
+ ntohs(readw(ti->init_srb + RCV_BUF_LEN_OFST)));
+ writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
+ writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+}
+
+/*****************************************************************************/
+
+static void open_sap(unsigned char type, struct net_device *dev)
+{
+ int i;
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+
+ SET_PAGE(ti->srb_page);
+ for (i = 0; i < sizeof(struct dlc_open_sap); i++)
+ writeb(0, ti->srb + i);
+
+#define MAX_I_FIELD_OFST 14
+#define SAP_VALUE_OFST 16
+#define SAP_OPTIONS_OFST 17
+#define STATION_COUNT_OFST 18
+
+ writeb(DLC_OPEN_SAP, ti->srb + COMMAND_OFST);
+ writew(htons(MAX_I_FIELD), ti->srb + MAX_I_FIELD_OFST);
+ writeb(SAP_OPEN_IND_SAP | SAP_OPEN_PRIORITY, ti->srb+ SAP_OPTIONS_OFST);
+ writeb(SAP_OPEN_STATION_CNT, ti->srb + STATION_COUNT_OFST);
+ writeb(type, ti->srb + SAP_VALUE_OFST);
+ writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+}
+
+
+/*****************************************************************************/
+
+static void tok_set_multicast_list(struct net_device *dev)
+{
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+ struct dev_mc_list *mclist;
+ unsigned char address[4];
+
+ int i;
+
+ /*BMS the next line is CRUCIAL or you may be sad when you */
+ /*BMS ifconfig tr down or hot unplug a PCMCIA card ??hownowbrowncow*/
+ if (/*BMSHELPdev->start == 0 ||*/ ti->open_status != OPEN) return;
+ address[0] = address[1] = address[2] = address[3] = 0;
+ mclist = dev->mc_list;
+ for (i = 0; i < dev->mc_count; i++) {
+ address[0] |= mclist->dmi_addr[2];
+ address[1] |= mclist->dmi_addr[3];
+ address[2] |= mclist->dmi_addr[4];
+ address[3] |= mclist->dmi_addr[5];
+ mclist = mclist->next;
+ }
+ SET_PAGE(ti->srb_page);
+ for (i = 0; i < sizeof(struct srb_set_funct_addr); i++)
+ writeb(0, ti->srb + i);
+
+#define FUNCT_ADDRESS_OFST 6
+
+ writeb(DIR_SET_FUNC_ADDR, ti->srb + COMMAND_OFST);
+ for (i = 0; i < 4; i++)
+ writeb(address[i], ti->srb + FUNCT_ADDRESS_OFST + i);
+ writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+#if TR_VERBOSE
+ DPRINTK("Setting functional address: ");
+ for (i=0;i<4;i++) printk("%02X ", address[i]);
+ printk("\n");
+#endif
+}
+
+/*****************************************************************************/
+
+#define STATION_ID_OFST 4
+
+static int tok_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+ struct tok_info *ti;
+ unsigned long flags;
+ ti = (struct tok_info *) dev->priv;
+
+ netif_stop_queue(dev);
+
+ /* lock against other CPUs */
+ spin_lock_irqsave(&(ti->lock), flags);
+
+ /* Save skb; we'll need it when the adapter asks for the data */
+ ti->current_skb = skb;
+ SET_PAGE(ti->srb_page);
+ writeb(XMIT_UI_FRAME, ti->srb + COMMAND_OFST);
+ writew(ti->exsap_station_id, ti->srb + STATION_ID_OFST);
+ writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+ spin_unlock_irqrestore(&(ti->lock), flags);
+ dev->trans_start = jiffies;
+ return 0;
+}
+
+/*****************************************************************************/
+
+static int tok_close(struct net_device *dev)
+{
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+
+ /* Important for PCMCIA hot unplug, otherwise, we'll pull the card, */
+ /* unloading the module from memory, and then if a timer pops, ouch */
+ del_timer_sync(&ti->tr_timer);
+ outb(0, dev->base_addr + ADAPTRESET);
+ ti->sram_phys |= 1;
+ ti->open_status = CLOSED;
+
+ netif_stop_queue(dev);
+ DPRINTK("Adapter is closed.\n");
+ return 0;
+}
+
+/*****************************************************************************/
+
+#define RETCODE_OFST 2
+#define OPEN_ERROR_CODE_OFST 6
+#define ASB_ADDRESS_OFST 8
+#define SRB_ADDRESS_OFST 10
+#define ARB_ADDRESS_OFST 12
+#define SSB_ADDRESS_OFST 14
+
+static char *printphase[]= {"Lobe media test","Physical insertion",
+ "Address verification","Roll call poll","Request Parameters"};
+static char *printerror[]={"Function failure","Signal loss","Reserved",
+ "Frequency error","Timeout","Ring failure","Ring beaconing",
+ "Duplicate node address",
+ "Parameter request-retry count exceeded","Remove received",
+ "IMPL force received","Duplicate modifier",
+ "No monitor detected","Monitor contention failed for RPL"};
+
+static void __iomem *map_address(struct tok_info *ti, unsigned index, __u8 *page)
+{
+ if (ti->page_mask) {
+ *page = (index >> 8) & ti->page_mask;
+ index &= ~(ti->page_mask << 8);
+ }
+ return ti->sram_virt + index;
+}
+
+void dir_open_adapter (struct net_device *dev)
+{
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+ unsigned char ret_code;
+ __u16 err;
+
+ ti->srb = map_address(ti,
+ ntohs(readw(ti->init_srb + SRB_ADDRESS_OFST)),
+ &ti->srb_page);
+ ti->ssb = map_address(ti,
+ ntohs(readw(ti->init_srb + SSB_ADDRESS_OFST)),
+ &ti->ssb_page);
+ ti->arb = map_address(ti,
+ ntohs(readw(ti->init_srb + ARB_ADDRESS_OFST)),
+ &ti->arb_page);
+ ti->asb = map_address(ti,
+ ntohs(readw(ti->init_srb + ASB_ADDRESS_OFST)),
+ &ti->asb_page);
+ ti->current_skb = NULL;
+ ret_code = readb(ti->init_srb + RETCODE_OFST);
+ err = ntohs(readw(ti->init_srb + OPEN_ERROR_CODE_OFST));
+ if (!ret_code) {
+ ti->open_status = OPEN; /* TR adapter is now available */
+ if (ti->open_mode == AUTOMATIC) {
+ DPRINTK("Adapter reopened.\n");
+ }
+ writeb(~SRB_RESP_INT, ti->mmio+ACA_OFFSET+ACA_RESET+ISRP_ODD);
+ open_sap(EXTENDED_SAP, dev);
+ return;
+ }
+ ti->open_failure = YES;
+ if (ret_code == 7){
+ if (err == 0x24) {
+ if (!ti->auto_speedsave) {
+ DPRINTK("Open failed: Adapter speed must match "
+ "ring speed if Automatic Ring Speed Save is "
+ "disabled.\n");
+ ti->open_action = FAIL;
+ }else
+ DPRINTK("Retrying open to adjust to "
+ "ring speed, ");
+ } else if (err == 0x2d) {
+ DPRINTK("Physical Insertion: No Monitor Detected, ");
+ printk("retrying after %ds delay...\n",
+ TR_RETRY_INTERVAL/HZ);
+ } else if (err == 0x11) {
+ DPRINTK("Lobe Media Function Failure (0x11), ");
+ printk(" retrying after %ds delay...\n",
+ TR_RETRY_INTERVAL/HZ);
+ } else {
+ char **prphase = printphase;
+ char **prerror = printerror;
+ DPRINTK("TR Adapter misc open failure, error code = ");
+ printk("0x%x, Phase: %s, Error: %s\n",
+ err, prphase[err/16 -1], prerror[err%16 -1]);
+ printk(" retrying after %ds delay...\n",
+ TR_RETRY_INTERVAL/HZ);
+ }
+ } else DPRINTK("open failed: ret_code = %02X..., ", ret_code);
+ if (ti->open_action != FAIL) {
+ if (ti->open_mode==AUTOMATIC){
+ ti->open_action = REOPEN;
+ ibmtr_reset_timer(&(ti->tr_timer), dev);
+ return;
+ }
+ wake_up(&ti->wait_for_reset);
+ return;
+ }
+ DPRINTK("FAILURE, CAPUT\n");
+}
+
+/******************************************************************************/
+
+irqreturn_t tok_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ unsigned char status;
+ /* unsigned char status_even ; */
+ struct tok_info *ti;
+ struct net_device *dev;
+#ifdef ENABLE_PAGING
+ unsigned char save_srpr;
+#endif
+
+ dev = dev_id;
+#if TR_VERBOSE
+ DPRINTK("Int from tok_driver, dev : %p irq%d regs=%p\n", dev,irq,regs);
+#endif
+ ti = (struct tok_info *) dev->priv;
+ if (ti->sram_phys & 1)
+ return IRQ_NONE; /* PCMCIA card extraction flag */
+ spin_lock(&(ti->lock));
+#ifdef ENABLE_PAGING
+ save_srpr = readb(ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
+#endif
+
+ /* Disable interrupts till processing is finished */
+ writeb((~INT_ENABLE), ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
+
+ /* Reset interrupt for ISA boards */
+ if (ti->adapter_int_enable)
+ outb(0, ti->adapter_int_enable);
+ else /* used for PCMCIA cards */
+ outb(0, ti->global_int_enable);
+ if (ti->do_tok_int == FIRST_INT){
+ initial_tok_int(dev);
+#ifdef ENABLE_PAGING
+ writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
+#endif
+ spin_unlock(&(ti->lock));
+ return IRQ_HANDLED;
+ }
+ /* Begin interrupt handler HERE inline to avoid the extra
+ levels of logic and call depth for the original solution. */
+ status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_ODD);
+ /*BMSstatus_even = readb (ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN) */
+ /*BMSdebugprintk("tok_interrupt: ISRP_ODD = 0x%x ISRP_EVEN = 0x%x\n", */
+ /*BMS status,status_even); */
+
+ if (status & ADAP_CHK_INT) {
+ int i;
+ void __iomem *check_reason;
+ __u8 check_reason_page = 0;
+ check_reason = map_address(ti,
+ ntohs(readw(ti->mmio+ ACA_OFFSET+ACA_RW + WWCR_EVEN)),
+ &check_reason_page);
+ SET_PAGE(check_reason_page);
+
+ DPRINTK("Adapter check interrupt\n");
+ DPRINTK("8 reason bytes follow: ");
+ for (i = 0; i < 8; i++, check_reason++)
+ printk("%02X ", (int) readb(check_reason));
+ printk("\n");
+ writeb(~ADAP_CHK_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
+ status = readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRA_EVEN);
+ DPRINTK("ISRA_EVEN == 0x02%x\n",status);
+ ti->open_status = CLOSED;
+ ti->sap_status = CLOSED;
+ ti->open_mode = AUTOMATIC;
+ dev->flags &= ~IFF_RUNNING;
+ netif_stop_queue(dev);
+ ti->open_action = RESTART;
+ outb(0, dev->base_addr + ADAPTRESET);
+ ibmtr_reset_timer(&(ti->tr_timer), dev);/*BMS try to reopen*/
+ spin_unlock(&(ti->lock));
+ return IRQ_HANDLED;
+ }
+ if (readb(ti->mmio + ACA_OFFSET + ACA_RW + ISRP_EVEN)
+ & (TCR_INT | ERR_INT | ACCESS_INT)) {
+ DPRINTK("adapter error: ISRP_EVEN : %02x\n",
+ (int)readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRP_EVEN));
+ writeb(~(TCR_INT | ERR_INT | ACCESS_INT),
+ ti->mmio + ACA_OFFSET + ACA_RESET + ISRP_EVEN);
+ status= readb(ti->mmio+ ACA_OFFSET + ACA_RW + ISRA_EVEN);/*BMS*/
+ DPRINTK("ISRA_EVEN == 0x02%x\n",status);/*BMS*/
+ writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
+#ifdef ENABLE_PAGING
+ writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
+#endif
+ spin_unlock(&(ti->lock));
+ return IRQ_HANDLED;
+ }
+ if (status & SRB_RESP_INT) { /* SRB response */
+ SET_PAGE(ti->srb_page);
+#if TR_VERBOSE
+ DPRINTK("SRB resp: cmd=%02X rsp=%02X\n",
+ readb(ti->srb), readb(ti->srb + RETCODE_OFST));
+#endif
+ switch (readb(ti->srb)) { /* SRB command check */
+ case XMIT_DIR_FRAME:{
+ unsigned char xmit_ret_code;
+ xmit_ret_code = readb(ti->srb + RETCODE_OFST);
+ if (xmit_ret_code == 0xff) break;
+ DPRINTK("error on xmit_dir_frame request: %02X\n",
+ xmit_ret_code);
+ if (ti->current_skb) {
+ dev_kfree_skb_irq(ti->current_skb);
+ ti->current_skb = NULL;
+ }
+ /*dev->tbusy = 0;*/
+ netif_wake_queue(dev);
+ if (ti->readlog_pending)
+ ibmtr_readlog(dev);
+ break;
+ }
+ case XMIT_UI_FRAME:{
+ unsigned char xmit_ret_code;
+
+ xmit_ret_code = readb(ti->srb + RETCODE_OFST);
+ if (xmit_ret_code == 0xff) break;
+ DPRINTK("error on xmit_ui_frame request: %02X\n",
+ xmit_ret_code);
+ if (ti->current_skb) {
+ dev_kfree_skb_irq(ti->current_skb);
+ ti->current_skb = NULL;
+ }
+ netif_wake_queue(dev);
+ if (ti->readlog_pending)
+ ibmtr_readlog(dev);
+ break;
+ }
+ case DIR_OPEN_ADAPTER:
+ dir_open_adapter(dev);
+ break;
+ case DLC_OPEN_SAP:
+ if (readb(ti->srb + RETCODE_OFST)) {
+ DPRINTK("open_sap failed: ret_code = %02X, "
+ "retrying\n",
+ (int) readb(ti->srb + RETCODE_OFST));
+ ti->open_action = REOPEN;
+ ibmtr_reset_timer(&(ti->tr_timer), dev);
+ break;
+ }
+ ti->exsap_station_id = readw(ti->srb + STATION_ID_OFST);
+ ti->sap_status = OPEN;/* TR adapter is now available */
+ if (ti->open_mode==MANUAL){
+ wake_up(&ti->wait_for_reset);
+ break;
+ }
+ netif_wake_queue(dev);
+ dev->flags |= IFF_RUNNING;/*BMS 12/2000*/
+ break;
+ case DIR_INTERRUPT:
+ case DIR_MOD_OPEN_PARAMS:
+ case DIR_SET_GRP_ADDR:
+ case DIR_SET_FUNC_ADDR:
+ case DLC_CLOSE_SAP:
+ if (readb(ti->srb + RETCODE_OFST))
+ DPRINTK("error on %02X: %02X\n",
+ (int) readb(ti->srb + COMMAND_OFST),
+ (int) readb(ti->srb + RETCODE_OFST));
+ break;
+ case DIR_READ_LOG:
+ if (readb(ti->srb + RETCODE_OFST)){
+ DPRINTK("error on dir_read_log: %02X\n",
+ (int) readb(ti->srb + RETCODE_OFST));
+ netif_wake_queue(dev);
+ break;
+ }
+#if IBMTR_DEBUG_MESSAGES
+
+#define LINE_ERRORS_OFST 0
+#define INTERNAL_ERRORS_OFST 1
+#define BURST_ERRORS_OFST 2
+#define AC_ERRORS_OFST 3
+#define ABORT_DELIMITERS_OFST 4
+#define LOST_FRAMES_OFST 6
+#define RECV_CONGEST_COUNT_OFST 7
+#define FRAME_COPIED_ERRORS_OFST 8
+#define FREQUENCY_ERRORS_OFST 9
+#define TOKEN_ERRORS_OFST 10
+
+ DPRINTK("Line errors %02X, Internal errors %02X, "
+ "Burst errors %02X\n" "A/C errors %02X, "
+ "Abort delimiters %02X, Lost frames %02X\n"
+ "Receive congestion count %02X, "
+ "Frame copied errors %02X\nFrequency errors %02X, "
+ "Token errors %02X\n",
+ (int) readb(ti->srb + LINE_ERRORS_OFST),
+ (int) readb(ti->srb + INTERNAL_ERRORS_OFST),
+ (int) readb(ti->srb + BURST_ERRORS_OFST),
+ (int) readb(ti->srb + AC_ERRORS_OFST),
+ (int) readb(ti->srb + ABORT_DELIMITERS_OFST),
+ (int) readb(ti->srb + LOST_FRAMES_OFST),
+ (int) readb(ti->srb + RECV_CONGEST_COUNT_OFST),
+ (int) readb(ti->srb + FRAME_COPIED_ERRORS_OFST),
+ (int) readb(ti->srb + FREQUENCY_ERRORS_OFST),
+ (int) readb(ti->srb + TOKEN_ERRORS_OFST));
+#endif
+ netif_wake_queue(dev);
+ break;
+ default:
+ DPRINTK("Unknown command %02X encountered\n",
+ (int) readb(ti->srb));
+ } /* end switch SRB command check */
+ writeb(~SRB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
+ } /* if SRB response */
+ if (status & ASB_FREE_INT) { /* ASB response */
+ SET_PAGE(ti->asb_page);
+#if TR_VERBOSE
+ DPRINTK("ASB resp: cmd=%02X\n", readb(ti->asb));
+#endif
+
+ switch (readb(ti->asb)) { /* ASB command check */
+ case REC_DATA:
+ case XMIT_UI_FRAME:
+ case XMIT_DIR_FRAME:
+ break;
+ default:
+ DPRINTK("unknown command in asb %02X\n",
+ (int) readb(ti->asb));
+ } /* switch ASB command check */
+ if (readb(ti->asb + 2) != 0xff) /* checks ret_code */
+ DPRINTK("ASB error %02X in cmd %02X\n",
+ (int) readb(ti->asb + 2), (int) readb(ti->asb));
+ writeb(~ASB_FREE_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
+ } /* if ASB response */
+
+#define STATUS_OFST 6
+#define NETW_STATUS_OFST 6
+
+ if (status & ARB_CMD_INT) { /* ARB response */
+ SET_PAGE(ti->arb_page);
+#if TR_VERBOSE
+ DPRINTK("ARB resp: cmd=%02X\n", readb(ti->arb));
+#endif
+
+ switch (readb(ti->arb)) { /* ARB command check */
+ case DLC_STATUS:
+ DPRINTK("DLC_STATUS new status: %02X on station %02X\n",
+ ntohs(readw(ti->arb + STATUS_OFST)),
+ ntohs(readw(ti->arb+ STATION_ID_OFST)));
+ break;
+ case REC_DATA:
+ tr_rx(dev);
+ break;
+ case RING_STAT_CHANGE:{
+ unsigned short ring_status;
+ ring_status= ntohs(readw(ti->arb + NETW_STATUS_OFST));
+ if (ibmtr_debug_trace & TRC_INIT)
+ DPRINTK("Ring Status Change...(0x%x)\n",
+ ring_status);
+ if(ring_status& (REMOVE_RECV|AUTO_REMOVAL|LOBE_FAULT)){
+ netif_stop_queue(dev);
+ dev->flags &= ~IFF_RUNNING;/*not typical Linux*/
+ DPRINTK("Remove received, or Auto-removal error"
+ ", or Lobe fault\n");
+ DPRINTK("We'll try to reopen the closed adapter"
+ " after a %d second delay.\n",
+ TR_RETRY_INTERVAL/HZ);
+ /*I was confused: I saw the TR reopening but */
+ /*forgot:with an RJ45 in an RJ45/ICS adapter */
+ /*but adapter not in the ring, the TR will */
+ /* open, and then soon close and come here. */
+ ti->open_mode = AUTOMATIC;
+ ti->open_status = CLOSED; /*12/2000 BMS*/
+ ti->open_action = REOPEN;
+ ibmtr_reset_timer(&(ti->tr_timer), dev);
+ } else if (ring_status & LOG_OVERFLOW) {
+ if(netif_queue_stopped(dev))
+ ti->readlog_pending = 1;
+ else
+ ibmtr_readlog(dev);
+ }
+ break;
+ }
+ case XMIT_DATA_REQ:
+ tr_tx(dev);
+ break;
+ default:
+ DPRINTK("Unknown command %02X in arb\n",
+ (int) readb(ti->arb));
+ break;
+ } /* switch ARB command check */
+ writeb(~ARB_CMD_INT, ti->mmio+ ACA_OFFSET+ACA_RESET + ISRP_ODD);
+ writeb(ARB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+ } /* if ARB response */
+ if (status & SSB_RESP_INT) { /* SSB response */
+ unsigned char retcode;
+ SET_PAGE(ti->ssb_page);
+#if TR_VERBOSE
+ DPRINTK("SSB resp: cmd=%02X rsp=%02X\n",
+ readb(ti->ssb), readb(ti->ssb + 2));
+#endif
+
+ switch (readb(ti->ssb)) { /* SSB command check */
+ case XMIT_DIR_FRAME:
+ case XMIT_UI_FRAME:
+ retcode = readb(ti->ssb + 2);
+ if (retcode && (retcode != 0x22))/* checks ret_code */
+ DPRINTK("xmit ret_code: %02X xmit error code: "
+ "%02X\n",
+ (int)retcode, (int)readb(ti->ssb + 6));
+ else
+ ti->tr_stats.tx_packets++;
+ break;
+ case XMIT_XID_CMD:
+ DPRINTK("xmit xid ret_code: %02X\n",
+ (int) readb(ti->ssb + 2));
+ default:
+ DPRINTK("Unknown command %02X in ssb\n",
+ (int) readb(ti->ssb));
+ } /* SSB command check */
+ writeb(~SSB_RESP_INT, ti->mmio+ ACA_OFFSET+ACA_RESET+ ISRP_ODD);
+ writeb(SSB_FREE, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+ } /* if SSB response */
+#ifdef ENABLE_PAGING
+ writeb(save_srpr, ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
+#endif
+ writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
+ spin_unlock(&(ti->lock));
+ return IRQ_HANDLED;
+} /*tok_interrupt */
+
+/*****************************************************************************/
+
+#define INIT_STATUS_OFST 1
+#define INIT_STATUS_2_OFST 2
+#define ENCODED_ADDRESS_OFST 8
+
+static void initial_tok_int(struct net_device *dev)
+{
+
+ __u32 encoded_addr, hw_encoded_addr;
+ struct tok_info *ti;
+ unsigned char init_status; /*BMS 12/2000*/
+
+ ti = (struct tok_info *) dev->priv;
+
+ ti->do_tok_int = NOT_FIRST;
+
+ /* we assign the shared-ram address for ISA devices */
+ writeb(ti->sram_base, ti->mmio + ACA_OFFSET + ACA_RW + RRR_EVEN);
+#ifndef PCMCIA
+ ti->sram_virt = ioremap(((__u32)ti->sram_base << 12), ti->avail_shared_ram);
+#endif
+ ti->init_srb = map_address(ti,
+ ntohs(readw(ti->mmio + ACA_OFFSET + WRBR_EVEN)),
+ &ti->init_srb_page);
+ if (ti->page_mask && ti->avail_shared_ram == 127) {
+ void __iomem *last_512;
+ __u8 last_512_page=0;
+ int i;
+ last_512 = map_address(ti, 0xfe00, &last_512_page);
+ /* initialize high section of ram (if necessary) */
+ SET_PAGE(last_512_page);
+ for (i = 0; i < 512; i++)
+ writeb(0, last_512 + i);
+ }
+ SET_PAGE(ti->init_srb_page);
+
+#if TR_VERBOSE
+ {
+ int i;
+
+ DPRINTK("ti->init_srb_page=0x%x\n", ti->init_srb_page);
+ DPRINTK("init_srb(%p):", ti->init_srb );
+ for (i = 0; i < 20; i++)
+ printk("%02X ", (int) readb(ti->init_srb + i));
+ printk("\n");
+ }
+#endif
+
+ hw_encoded_addr = readw(ti->init_srb + ENCODED_ADDRESS_OFST);
+ encoded_addr = ntohs(hw_encoded_addr);
+ init_status= /*BMS 12/2000 check for shallow mode possibility (Turbo)*/
+ readb(ti->init_srb+offsetof(struct srb_init_response,init_status));
+ /*printk("Initial interrupt: init_status= 0x%02x\n",init_status);*/
+ ti->ring_speed = init_status & 0x01 ? 16 : 4;
+ DPRINTK("Initial interrupt : %d Mbps, shared RAM base %08x.\n",
+ ti->ring_speed, (unsigned int)dev->mem_start);
+ ti->auto_speedsave=readb(ti->init_srb+INIT_STATUS_2_OFST)&4?TRUE:FALSE;
+
+ if (ti->open_mode == MANUAL) wake_up(&ti->wait_for_reset);
+ else tok_open_adapter((unsigned long)dev);
+
+} /*initial_tok_int() */
+
+/*****************************************************************************/
+
+#define CMD_CORRELATE_OFST 1
+#define DHB_ADDRESS_OFST 6
+
+#define FRAME_LENGTH_OFST 6
+#define HEADER_LENGTH_OFST 8
+#define RSAP_VALUE_OFST 9
+
+static void tr_tx(struct net_device *dev)
+{
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+ struct trh_hdr *trhdr = (struct trh_hdr *) ti->current_skb->data;
+ unsigned int hdr_len;
+ __u32 dhb=0,dhb_base;
+ void __iomem *dhbuf = NULL;
+ unsigned char xmit_command;
+ int i,dhb_len=0x4000,src_len,src_offset;
+ struct trllc *llc;
+ struct srb_xmit xsrb;
+ __u8 dhb_page = 0;
+ __u8 llc_ssap;
+
+ SET_PAGE(ti->asb_page);
+
+ if (readb(ti->asb+RETCODE_OFST) != 0xFF) DPRINTK("ASB not free !!!\n");
+
+ /* in providing the transmit interrupts, is telling us it is ready for
+ data and providing a shared memory address for us to stuff with data.
+ Here we compute the effective address where we will place data.
+ */
+ SET_PAGE(ti->arb_page);
+ dhb=dhb_base=ntohs(readw(ti->arb + DHB_ADDRESS_OFST));
+ if (ti->page_mask) {
+ dhb_page = (dhb_base >> 8) & ti->page_mask;
+ dhb=dhb_base & ~(ti->page_mask << 8);
+ }
+ dhbuf = ti->sram_virt + dhb;
+
+ /* Figure out the size of the 802.5 header */
+ if (!(trhdr->saddr[0] & 0x80)) /* RIF present? */
+ hdr_len = sizeof(struct trh_hdr) - TR_MAXRIFLEN;
+ else
+ hdr_len = ((ntohs(trhdr->rcf) & TR_RCF_LEN_MASK) >> 8)
+ + sizeof(struct trh_hdr) - TR_MAXRIFLEN;
+
+ llc = (struct trllc *) (ti->current_skb->data + hdr_len);
+
+ llc_ssap = llc->ssap;
+ SET_PAGE(ti->srb_page);
+ memcpy_fromio(&xsrb, ti->srb, sizeof(xsrb));
+ SET_PAGE(ti->asb_page);
+ xmit_command = xsrb.command;
+
+ writeb(xmit_command, ti->asb + COMMAND_OFST);
+ writew(xsrb.station_id, ti->asb + STATION_ID_OFST);
+ writeb(llc_ssap, ti->asb + RSAP_VALUE_OFST);
+ writeb(xsrb.cmd_corr, ti->asb + CMD_CORRELATE_OFST);
+ writeb(0, ti->asb + RETCODE_OFST);
+ if ((xmit_command == XMIT_XID_CMD) || (xmit_command == XMIT_TEST_CMD)) {
+ writew(htons(0x11), ti->asb + FRAME_LENGTH_OFST);
+ writeb(0x0e, ti->asb + HEADER_LENGTH_OFST);
+ SET_PAGE(dhb_page);
+ writeb(AC, dhbuf);
+ writeb(LLC_FRAME, dhbuf + 1);
+ for (i = 0; i < TR_ALEN; i++)
+ writeb((int) 0x0FF, dhbuf + i + 2);
+ for (i = 0; i < TR_ALEN; i++)
+ writeb(0, dhbuf + i + TR_ALEN + 2);
+ writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+ return;
+ }
+ /*
+ * the token ring packet is copied from sk_buff to the adapter
+ * buffer identified in the command data received with the interrupt.
+ */
+ writeb(hdr_len, ti->asb + HEADER_LENGTH_OFST);
+ writew(htons(ti->current_skb->len), ti->asb + FRAME_LENGTH_OFST);
+ src_len=ti->current_skb->len;
+ src_offset=0;
+ dhb=dhb_base;
+ while(1) {
+ if (ti->page_mask) {
+ dhb_page=(dhb >> 8) & ti->page_mask;
+ dhb=dhb & ~(ti->page_mask << 8);
+ dhb_len=0x4000-dhb; /* remaining size of this page */
+ }
+ dhbuf = ti->sram_virt + dhb;
+ SET_PAGE(dhb_page);
+ if (src_len > dhb_len) {
+ memcpy_toio(dhbuf,&ti->current_skb->data[src_offset],
+ dhb_len);
+ src_len -= dhb_len;
+ src_offset += dhb_len;
+ dhb_base+=dhb_len;
+ dhb=dhb_base;
+ continue;
+ }
+ memcpy_toio(dhbuf, &ti->current_skb->data[src_offset], src_len);
+ break;
+ }
+ writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+ ti->tr_stats.tx_bytes += ti->current_skb->len;
+ dev_kfree_skb_irq(ti->current_skb);
+ ti->current_skb = NULL;
+ netif_wake_queue(dev);
+ if (ti->readlog_pending)
+ ibmtr_readlog(dev);
+} /*tr_tx */
+
+/*****************************************************************************/
+
+
+#define RECEIVE_BUFFER_OFST 6
+#define LAN_HDR_LENGTH_OFST 8
+#define DLC_HDR_LENGTH_OFST 9
+
+#define DSAP_OFST 0
+#define SSAP_OFST 1
+#define LLC_OFST 2
+#define PROTID_OFST 3
+#define ETHERTYPE_OFST 6
+
+static void tr_rx(struct net_device *dev)
+{
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+ __u32 rbuffer;
+ void __iomem *rbuf, *rbufdata, *llc;
+ __u8 rbuffer_page = 0;
+ unsigned char *data;
+ unsigned int rbuffer_len, lan_hdr_len, hdr_len, ip_len, length;
+ unsigned char dlc_hdr_len;
+ struct sk_buff *skb;
+ unsigned int skb_size = 0;
+ int IPv4_p = 0;
+ unsigned int chksum = 0;
+ struct iphdr *iph;
+ struct arb_rec_req rarb;
+
+ SET_PAGE(ti->arb_page);
+ memcpy_fromio(&rarb, ti->arb, sizeof(rarb));
+ rbuffer = ntohs(rarb.rec_buf_addr) ;
+ rbuf = map_address(ti, rbuffer, &rbuffer_page);
+
+ SET_PAGE(ti->asb_page);
+
+ if (readb(ti->asb + RETCODE_OFST) !=0xFF) DPRINTK("ASB not free !!!\n");
+
+ writeb(REC_DATA, ti->asb + COMMAND_OFST);
+ writew(rarb.station_id, ti->asb + STATION_ID_OFST);
+ writew(rarb.rec_buf_addr, ti->asb + RECEIVE_BUFFER_OFST);
+
+ lan_hdr_len = rarb.lan_hdr_len;
+ if (lan_hdr_len > sizeof(struct trh_hdr)) {
+ DPRINTK("Linux cannot handle greater than 18 bytes RIF\n");
+ return;
+ } /*BMS I added this above just to be very safe */
+ dlc_hdr_len = readb(ti->arb + DLC_HDR_LENGTH_OFST);
+ hdr_len = lan_hdr_len + sizeof(struct trllc) + sizeof(struct iphdr);
+
+ SET_PAGE(rbuffer_page);
+ llc = rbuf + offsetof(struct rec_buf, data) + lan_hdr_len;
+
+#if TR_VERBOSE
+ DPRINTK("offsetof data: %02X lan_hdr_len: %02X\n",
+ (__u32) offsetof(struct rec_buf, data), (unsigned int) lan_hdr_len);
+ DPRINTK("llc: %08X rec_buf_addr: %04X dev->mem_start: %lX\n",
+ llc, ntohs(rarb.rec_buf_addr), dev->mem_start);
+ DPRINTK("dsap: %02X, ssap: %02X, llc: %02X, protid: %02X%02X%02X, "
+ "ethertype: %04X\n",
+ (int) readb(llc + DSAP_OFST), (int) readb(llc + SSAP_OFST),
+ (int) readb(llc + LLC_OFST), (int) readb(llc + PROTID_OFST),
+ (int) readb(llc+PROTID_OFST+1),(int)readb(llc+PROTID_OFST + 2),
+ (int) ntohs(readw(llc + ETHERTYPE_OFST)));
+#endif
+ if (readb(llc + offsetof(struct trllc, llc)) != UI_CMD) {
+ SET_PAGE(ti->asb_page);
+ writeb(DATA_LOST, ti->asb + RETCODE_OFST);
+ ti->tr_stats.rx_dropped++;
+ writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+ return;
+ }
+ length = ntohs(rarb.frame_len);
+ if (readb(llc + DSAP_OFST) == EXTENDED_SAP &&
+ readb(llc + SSAP_OFST) == EXTENDED_SAP &&
+ length >= hdr_len) IPv4_p = 1;
+#if TR_VERBOSE
+#define SADDR_OFST 8
+#define DADDR_OFST 2
+
+ if (!IPv4_p) {
+
+ void __iomem *trhhdr = rbuf + offsetof(struct rec_buf, data);
+
+ DPRINTK("Probably non-IP frame received.\n");
+ DPRINTK("ssap: %02X dsap: %02X "
+ "saddr: %02X:%02X:%02X:%02X:%02X:%02X "
+ "daddr: %02X:%02X:%02X:%02X:%02X:%02X\n",
+ readb(llc + SSAP_OFST), readb(llc + DSAP_OFST),
+ readb(trhhdr+SADDR_OFST), readb(trhhdr+ SADDR_OFST+1),
+ readb(trhhdr+SADDR_OFST+2), readb(trhhdr+SADDR_OFST+3),
+ readb(trhhdr+SADDR_OFST+4), readb(trhhdr+SADDR_OFST+5),
+ readb(trhhdr+DADDR_OFST), readb(trhhdr+DADDR_OFST + 1),
+ readb(trhhdr+DADDR_OFST+2), readb(trhhdr+DADDR_OFST+3),
+ readb(trhhdr+DADDR_OFST+4), readb(trhhdr+DADDR_OFST+5));
+ }
+#endif
+
+ /*BMS handle the case she comes in with few hops but leaves with many */
+ skb_size=length-lan_hdr_len+sizeof(struct trh_hdr)+sizeof(struct trllc);
+
+ if (!(skb = dev_alloc_skb(skb_size))) {
+ DPRINTK("out of memory. frame dropped.\n");
+ ti->tr_stats.rx_dropped++;
+ SET_PAGE(ti->asb_page);
+ writeb(DATA_LOST, ti->asb + offsetof(struct asb_rec, ret_code));
+ writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+ return;
+ }
+ /*BMS again, if she comes in with few but leaves with many */
+ skb_reserve(skb, sizeof(struct trh_hdr) - lan_hdr_len);
+ skb_put(skb, length);
+ skb->dev = dev;
+ data = skb->data;
+ rbuffer_len = ntohs(readw(rbuf + offsetof(struct rec_buf, buf_len)));
+ rbufdata = rbuf + offsetof(struct rec_buf, data);
+
+ if (IPv4_p) {
+ /* Copy the headers without checksumming */
+ memcpy_fromio(data, rbufdata, hdr_len);
+
+ /* Watch for padded packets and bogons */
+ iph= (struct iphdr *)(data+ lan_hdr_len + sizeof(struct trllc));
+ ip_len = ntohs(iph->tot_len) - sizeof(struct iphdr);
+ length -= hdr_len;
+ if ((ip_len <= length) && (ip_len > 7))
+ length = ip_len;
+ data += hdr_len;
+ rbuffer_len -= hdr_len;
+ rbufdata += hdr_len;
+ }
+ /* Copy the payload... */
+#define BUFFER_POINTER_OFST 2
+#define BUFFER_LENGTH_OFST 6
+ for (;;) {
+ if (ibmtr_debug_trace&TRC_INITV && length < rbuffer_len)
+ DPRINTK("CURIOUS, length=%d < rbuffer_len=%d\n",
+ length,rbuffer_len);
+ if (IPv4_p)
+ chksum=csum_partial_copy_nocheck((void*)rbufdata,
+ data,length<rbuffer_len?length:rbuffer_len,chksum);
+ else
+ memcpy_fromio(data, rbufdata, rbuffer_len);
+ rbuffer = ntohs(readw(rbuf+BUFFER_POINTER_OFST)) ;
+ if (!rbuffer)
+ break;
+ rbuffer -= 2;
+ length -= rbuffer_len;
+ data += rbuffer_len;
+ rbuf = map_address(ti, rbuffer, &rbuffer_page);
+ SET_PAGE(rbuffer_page);
+ rbuffer_len = ntohs(readw(rbuf + BUFFER_LENGTH_OFST));
+ rbufdata = rbuf + offsetof(struct rec_buf, data);
+ }
+
+ SET_PAGE(ti->asb_page);
+ writeb(0, ti->asb + offsetof(struct asb_rec, ret_code));
+
+ writeb(RESP_IN_ASB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+
+ ti->tr_stats.rx_bytes += skb->len;
+ ti->tr_stats.rx_packets++;
+
+ skb->protocol = tr_type_trans(skb, dev);
+ if (IPv4_p) {
+ skb->csum = chksum;
+ skb->ip_summed = 1;
+ }
+ netif_rx(skb);
+ dev->last_rx = jiffies;
+} /*tr_rx */
+
+/*****************************************************************************/
+
+void ibmtr_reset_timer(struct timer_list *tmr, struct net_device *dev)
+{
+ tmr->expires = jiffies + TR_RETRY_INTERVAL;
+ tmr->data = (unsigned long) dev;
+ tmr->function = tok_rerun;
+ init_timer(tmr);
+ add_timer(tmr);
+}
+
+/*****************************************************************************/
+
+void tok_rerun(unsigned long dev_addr){
+
+ struct net_device *dev = (struct net_device *)dev_addr;
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+
+ if ( ti->open_action == RESTART){
+ ti->do_tok_int = FIRST_INT;
+ outb(0, dev->base_addr + ADAPTRESETREL);
+#ifdef ENABLE_PAGING
+ if (ti->page_mask)
+ writeb(SRPR_ENABLE_PAGING,
+ ti->mmio + ACA_OFFSET + ACA_RW + SRPR_EVEN);
+#endif
+
+ writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
+ } else
+ tok_open_adapter(dev_addr);
+}
+
+/*****************************************************************************/
+
+void ibmtr_readlog(struct net_device *dev)
+{
+ struct tok_info *ti;
+
+ ti = (struct tok_info *) dev->priv;
+
+ ti->readlog_pending = 0;
+ SET_PAGE(ti->srb_page);
+ writeb(DIR_READ_LOG, ti->srb);
+ writeb(INT_ENABLE, ti->mmio + ACA_OFFSET + ACA_SET + ISRP_EVEN);
+ writeb(CMD_IN_SRB, ti->mmio + ACA_OFFSET + ACA_SET + ISRA_ODD);
+
+ netif_stop_queue(dev);
+
+}
+
+/*****************************************************************************/
+
+/* tok_get_stats(): Basically a scaffold routine which will return
+ the address of the tr_statistics structure associated with
+ this device -- the tr.... structure is an ethnet look-alike
+ so at least for this iteration may suffice. */
+
+static struct net_device_stats *tok_get_stats(struct net_device *dev)
+{
+
+ struct tok_info *toki;
+ toki = (struct tok_info *) dev->priv;
+ return (struct net_device_stats *) &toki->tr_stats;
+}
+
+/*****************************************************************************/
+
+int ibmtr_change_mtu(struct net_device *dev, int mtu)
+{
+ struct tok_info *ti = (struct tok_info *) dev->priv;
+
+ if (ti->ring_speed == 16 && mtu > ti->maxmtu16)
+ return -EINVAL;
+ if (ti->ring_speed == 4 && mtu > ti->maxmtu4)
+ return -EINVAL;
+ dev->mtu = mtu;
+ return 0;
+}
+
+/*****************************************************************************/
+#ifdef MODULE
+
+/* 3COM 3C619C supports 8 interrupts, 32 I/O ports */
+static struct net_device *dev_ibmtr[IBMTR_MAX_ADAPTERS];
+static int io[IBMTR_MAX_ADAPTERS] = { 0xa20, 0xa24 };
+static int irq[IBMTR_MAX_ADAPTERS];
+static int mem[IBMTR_MAX_ADAPTERS];
+
+MODULE_LICENSE("GPL");
+
+module_param_array(io, int, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+module_param_array(mem, int, NULL, 0);
+
+static int __init ibmtr_init(void)
+{
+ int i;
+ int count=0;
+
+ find_turbo_adapters(io);
+
+ for (i = 0; io[i] && (i < IBMTR_MAX_ADAPTERS); i++) {
+ struct net_device *dev;
+ irq[i] = 0;
+ mem[i] = 0;
+ dev = alloc_trdev(sizeof(struct tok_info));
+ if (dev == NULL) {
+ if (i == 0)
+ return -ENOMEM;
+ break;
+ }
+ dev->base_addr = io[i];
+ dev->irq = irq[i];
+ dev->mem_start = mem[i];
+
+ if (ibmtr_probe_card(dev)) {
+ free_netdev(dev);
+ continue;
+ }
+ dev_ibmtr[i] = dev;
+ count++;
+ }
+ if (count) return 0;
+ printk("ibmtr: register_netdev() returned non-zero.\n");
+ return -EIO;
+}
+module_init(ibmtr_init);
+
+static void __exit ibmtr_cleanup(void)
+{
+ int i;
+
+ for (i = 0; i < IBMTR_MAX_ADAPTERS; i++){
+ if (!dev_ibmtr[i])
+ continue;
+ unregister_netdev(dev_ibmtr[i]);
+ ibmtr_cleanup_card(dev_ibmtr[i]);
+ free_netdev(dev_ibmtr[i]);
+ }
+}
+module_exit(ibmtr_cleanup);
+#endif