diff options
Diffstat (limited to 'drivers/net/tokenring/tms380tr.c')
| -rw-r--r-- | drivers/net/tokenring/tms380tr.c | 2410 |
1 files changed, 2410 insertions, 0 deletions
diff --git a/drivers/net/tokenring/tms380tr.c b/drivers/net/tokenring/tms380tr.c new file mode 100644 index 00000000000..df43b449e42 --- /dev/null +++ b/drivers/net/tokenring/tms380tr.c @@ -0,0 +1,2410 @@ +/* + * tms380tr.c: A network driver library for Texas Instruments TMS380-based + * Token Ring Adapters. + * + * Originally sktr.c: Written 1997 by Christoph Goos + * + * A fine result of the Linux Systems Network Architecture Project. + * http://www.linux-sna.org + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + * The following modules are currently available for card support: + * - tmspci (Generic PCI card support) + * - abyss (Madge PCI support) + * - tmsisa (SysKonnect TR4/16 ISA) + * + * Sources: + * - The hardware related parts of this driver are take from + * the SysKonnect Token Ring driver for Windows NT. + * - I used the IBM Token Ring driver 'ibmtr.c' as a base for this + * driver, as well as the 'skeleton.c' driver by Donald Becker. + * - Also various other drivers in the linux source tree were taken + * as samples for some tasks. + * - TI TMS380 Second-Generation Token Ring User's Guide + * - TI datasheets for respective chips + * - David Hein at Texas Instruments + * - Various Madge employees + * + * Maintainer(s): + * JS Jay Schulist jschlst@samba.org + * CG Christoph Goos cgoos@syskonnect.de + * AF Adam Fritzler mid@auk.cx + * MLP Mike Phillips phillim@amtrak.com + * JF Jochen Friedrich jochen@scram.de + * + * Modification History: + * 29-Aug-97 CG Created + * 04-Apr-98 CG Fixed problems caused by tok_timer_check + * 10-Apr-98 CG Fixed lockups at cable disconnection + * 27-May-98 JS Formated to Linux Kernel Format + * 31-May-98 JS Hacked in PCI support + * 16-Jun-98 JS Modulized for multiple cards with one driver + * Sep-99 AF Renamed to tms380tr (supports more than SK's) + * 23-Sep-99 AF Added Compaq and Thomas-Conrad PCI support + * Fixed a bug causing double copies on PCI + * Fixed for new multicast stuff (2.2/2.3) + * 25-Sep-99 AF Uped TPL_NUM from 3 to 9 + * Removed extraneous 'No free TPL' + * 22-Dec-99 AF Added Madge PCI Mk2 support and generalized + * parts of the initilization procedure. + * 30-Dec-99 AF Turned tms380tr into a library ala 8390. + * Madge support is provided in the abyss module + * Generic PCI support is in the tmspci module. + * 30-Nov-00 JF Updated PCI code to support IO MMU via + * pci_map_static(). Alpha uses this MMU for ISA + * as well. + * 14-Jan-01 JF Fix DMA on ifdown/ifup sequences. Some + * cleanup. + * 13-Jan-02 JF Add spinlock to fix race condition. + * 09-Nov-02 JF Fixed printks to not SPAM the console during + * normal operation. + * 30-Dec-02 JF Removed incorrect __init from + * tms380tr_init_card. + * + * To do: + * 1. Multi/Broadcast packet handling (this may have fixed itself) + * 2. Write a sktrisa module that includes the old ISA support (done) + * 3. Allow modules to load their own microcode + * 4. Speed up the BUD process -- freezing the kernel for 3+sec is + * quite unacceptable. + * 5. Still a few remaining stalls when the cable is unplugged. + */ + +#ifdef MODULE +static const char version[] = "tms380tr.c: v1.10 30/12/2002 by Christoph Goos, Adam Fritzler\n"; +#endif + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ptrace.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/time.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/trdevice.h> +#include <linux/firmware.h> +#include <linux/bitops.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/irq.h> +#include <asm/uaccess.h> + +#include "tms380tr.h" /* Our Stuff */ + +/* Use 0 for production, 1 for verification, 2 for debug, and + * 3 for very verbose debug. + */ +#ifndef TMS380TR_DEBUG +#define TMS380TR_DEBUG 0 +#endif +static unsigned int tms380tr_debug = TMS380TR_DEBUG; + +static struct device tms_device; + +/* Index to functions, as function prototypes. + * Alphabetical by function name. + */ + +/* "A" */ +/* "B" */ +static int tms380tr_bringup_diags(struct net_device *dev); +/* "C" */ +static void tms380tr_cancel_tx_queue(struct net_local* tp); +static int tms380tr_chipset_init(struct net_device *dev); +static void tms380tr_chk_irq(struct net_device *dev); +static void tms380tr_chk_outstanding_cmds(struct net_device *dev); +static void tms380tr_chk_src_addr(unsigned char *frame, unsigned char *hw_addr); +static unsigned char tms380tr_chk_ssb(struct net_local *tp, unsigned short IrqType); +int tms380tr_close(struct net_device *dev); +static void tms380tr_cmd_status_irq(struct net_device *dev); +/* "D" */ +static void tms380tr_disable_interrupts(struct net_device *dev); +#if TMS380TR_DEBUG > 0 +static void tms380tr_dump(unsigned char *Data, int length); +#endif +/* "E" */ +static void tms380tr_enable_interrupts(struct net_device *dev); +static void tms380tr_exec_cmd(struct net_device *dev, unsigned short Command); +static void tms380tr_exec_sifcmd(struct net_device *dev, unsigned int WriteValue); +/* "F" */ +/* "G" */ +static struct net_device_stats *tms380tr_get_stats(struct net_device *dev); +/* "H" */ +static int tms380tr_hardware_send_packet(struct sk_buff *skb, + struct net_device *dev); +/* "I" */ +static int tms380tr_init_adapter(struct net_device *dev); +static void tms380tr_init_ipb(struct net_local *tp); +static void tms380tr_init_net_local(struct net_device *dev); +static void tms380tr_init_opb(struct net_device *dev); +/* "M" */ +/* "O" */ +int tms380tr_open(struct net_device *dev); +static void tms380tr_open_adapter(struct net_device *dev); +/* "P" */ +/* "R" */ +static void tms380tr_rcv_status_irq(struct net_device *dev); +static int tms380tr_read_ptr(struct net_device *dev); +static void tms380tr_read_ram(struct net_device *dev, unsigned char *Data, + unsigned short Address, int Length); +static int tms380tr_reset_adapter(struct net_device *dev); +static void tms380tr_reset_interrupt(struct net_device *dev); +static void tms380tr_ring_status_irq(struct net_device *dev); +/* "S" */ +static int tms380tr_send_packet(struct sk_buff *skb, struct net_device *dev); +static void tms380tr_set_multicast_list(struct net_device *dev); +static int tms380tr_set_mac_address(struct net_device *dev, void *addr); +/* "T" */ +static void tms380tr_timer_chk(unsigned long data); +static void tms380tr_timer_end_wait(unsigned long data); +static void tms380tr_tx_status_irq(struct net_device *dev); +/* "U" */ +static void tms380tr_update_rcv_stats(struct net_local *tp, + unsigned char DataPtr[], unsigned int Length); +/* "W" */ +void tms380tr_wait(unsigned long time); +static void tms380tr_write_rpl_status(RPL *rpl, unsigned int Status); +static void tms380tr_write_tpl_status(TPL *tpl, unsigned int Status); + +#define SIFREADB(reg) (((struct net_local *)dev->priv)->sifreadb(dev, reg)) +#define SIFWRITEB(val, reg) (((struct net_local *)dev->priv)->sifwriteb(dev, val, reg)) +#define SIFREADW(reg) (((struct net_local *)dev->priv)->sifreadw(dev, reg)) +#define SIFWRITEW(val, reg) (((struct net_local *)dev->priv)->sifwritew(dev, val, reg)) + + + +#if 0 /* TMS380TR_DEBUG > 0 */ +static int madgemc_sifprobe(struct net_device *dev) +{ + unsigned char old, chk1, chk2; + + old = SIFREADB(SIFADR); /* Get the old SIFADR value */ + + chk1 = 0; /* Begin with check value 0 */ + do { + madgemc_setregpage(dev, 0); + /* Write new SIFADR value */ + SIFWRITEB(chk1, SIFADR); + chk2 = SIFREADB(SIFADR); + if (chk2 != chk1) + return -1; + + madgemc_setregpage(dev, 1); + /* Read, invert and write */ + chk2 = SIFREADB(SIFADD); + if (chk2 != chk1) + return -1; + + madgemc_setregpage(dev, 0); + chk2 ^= 0x0FE; + SIFWRITEB(chk2, SIFADR); + + /* Read, invert and compare */ + madgemc_setregpage(dev, 1); + chk2 = SIFREADB(SIFADD); + madgemc_setregpage(dev, 0); + chk2 ^= 0x0FE; + + if(chk1 != chk2) + return (-1); /* No adapter */ + chk1 -= 2; + } while(chk1 != 0); /* Repeat 128 times (all byte values) */ + + madgemc_setregpage(dev, 0); /* sanity */ + /* Restore the SIFADR value */ + SIFWRITEB(old, SIFADR); + + return (0); +} +#endif + +/* + * Open/initialize the board. This is called sometime after + * booting when the 'ifconfig' program is run. + * + * This routine should set everything up anew at each open, even + * registers that "should" only need to be set once at boot, so that + * there is non-reboot way to recover if something goes wrong. + */ +int tms380tr_open(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + int err; + + /* init the spinlock */ + spin_lock_init(&tp->lock); + init_timer(&tp->timer); + + /* Reset the hardware here. Don't forget to set the station address. */ + +#ifdef CONFIG_ISA + if(dev->dma > 0) + { + unsigned long flags=claim_dma_lock(); + disable_dma(dev->dma); + set_dma_mode(dev->dma, DMA_MODE_CASCADE); + enable_dma(dev->dma); + release_dma_lock(flags); + } +#endif + + err = tms380tr_chipset_init(dev); + if(err) + { + printk(KERN_INFO "%s: Chipset initialization error\n", + dev->name); + return (-1); + } + + tp->timer.expires = jiffies + 30*HZ; + tp->timer.function = tms380tr_timer_end_wait; + tp->timer.data = (unsigned long)dev; + add_timer(&tp->timer); + + printk(KERN_DEBUG "%s: Adapter RAM size: %dK\n", + dev->name, tms380tr_read_ptr(dev)); + + tms380tr_enable_interrupts(dev); + tms380tr_open_adapter(dev); + + netif_start_queue(dev); + + /* Wait for interrupt from hardware. If interrupt does not come, + * there will be a timeout from the timer. + */ + tp->Sleeping = 1; + interruptible_sleep_on(&tp->wait_for_tok_int); + del_timer(&tp->timer); + + /* If AdapterVirtOpenFlag is 1, the adapter is now open for use */ + if(tp->AdapterVirtOpenFlag == 0) + { + tms380tr_disable_interrupts(dev); + return (-1); + } + + tp->StartTime = jiffies; + + /* Start function control timer */ + tp->timer.expires = jiffies + 2*HZ; + tp->timer.function = tms380tr_timer_chk; + tp->timer.data = (unsigned long)dev; + add_timer(&tp->timer); + + return (0); +} + +/* + * Timeout function while waiting for event + */ +static void tms380tr_timer_end_wait(unsigned long data) +{ + struct net_device *dev = (struct net_device*)data; + struct net_local *tp = netdev_priv(dev); + + if(tp->Sleeping) + { + tp->Sleeping = 0; + wake_up_interruptible(&tp->wait_for_tok_int); + } + + return; +} + +/* + * Initialize the chipset + */ +static int tms380tr_chipset_init(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + int err; + + tms380tr_init_ipb(tp); + tms380tr_init_opb(dev); + tms380tr_init_net_local(dev); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Resetting adapter...\n", dev->name); + err = tms380tr_reset_adapter(dev); + if(err < 0) + return (-1); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Bringup diags...\n", dev->name); + err = tms380tr_bringup_diags(dev); + if(err < 0) + return (-1); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Init adapter...\n", dev->name); + err = tms380tr_init_adapter(dev); + if(err < 0) + return (-1); + + if(tms380tr_debug > 3) + printk(KERN_DEBUG "%s: Done!\n", dev->name); + return (0); +} + +/* + * Initializes the net_local structure. + */ +static void tms380tr_init_net_local(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + int i; + dma_addr_t dmabuf; + + tp->scb.CMD = 0; + tp->scb.Parm[0] = 0; + tp->scb.Parm[1] = 0; + + tp->ssb.STS = 0; + tp->ssb.Parm[0] = 0; + tp->ssb.Parm[1] = 0; + tp->ssb.Parm[2] = 0; + + tp->CMDqueue = 0; + + tp->AdapterOpenFlag = 0; + tp->AdapterVirtOpenFlag = 0; + tp->ScbInUse = 0; + tp->OpenCommandIssued = 0; + tp->ReOpenInProgress = 0; + tp->HaltInProgress = 0; + tp->TransmitHaltScheduled = 0; + tp->LobeWireFaultLogged = 0; + tp->LastOpenStatus = 0; + tp->MaxPacketSize = DEFAULT_PACKET_SIZE; + + /* Create circular chain of transmit lists */ + for (i = 0; i < TPL_NUM; i++) + { + tp->Tpl[i].NextTPLAddr = htonl(((char *)(&tp->Tpl[(i+1) % TPL_NUM]) - (char *)tp) + tp->dmabuffer); /* DMA buffer may be MMU driven */ + tp->Tpl[i].Status = 0; + tp->Tpl[i].FrameSize = 0; + tp->Tpl[i].FragList[0].DataCount = 0; + tp->Tpl[i].FragList[0].DataAddr = 0; + tp->Tpl[i].NextTPLPtr = &tp->Tpl[(i+1) % TPL_NUM]; + tp->Tpl[i].MData = NULL; + tp->Tpl[i].TPLIndex = i; + tp->Tpl[i].DMABuff = 0; + tp->Tpl[i].BusyFlag = 0; + } + + tp->TplFree = tp->TplBusy = &tp->Tpl[0]; + + /* Create circular chain of receive lists */ + for (i = 0; i < RPL_NUM; i++) + { + tp->Rpl[i].NextRPLAddr = htonl(((char *)(&tp->Rpl[(i+1) % RPL_NUM]) - (char *)tp) + tp->dmabuffer); /* DMA buffer may be MMU driven */ + tp->Rpl[i].Status = (RX_VALID | RX_START_FRAME | RX_END_FRAME | RX_FRAME_IRQ); + tp->Rpl[i].FrameSize = 0; + tp->Rpl[i].FragList[0].DataCount = cpu_to_be16((unsigned short)tp->MaxPacketSize); + + /* Alloc skb and point adapter to data area */ + tp->Rpl[i].Skb = dev_alloc_skb(tp->MaxPacketSize); + tp->Rpl[i].DMABuff = 0; + + /* skb == NULL ? then use local buffer */ + if(tp->Rpl[i].Skb == NULL) + { + tp->Rpl[i].SkbStat = SKB_UNAVAILABLE; + tp->Rpl[i].FragList[0].DataAddr = htonl(((char *)tp->LocalRxBuffers[i] - (char *)tp) + tp->dmabuffer); + tp->Rpl[i].MData = tp->LocalRxBuffers[i]; + } + else /* SKB != NULL */ + { + tp->Rpl[i].Skb->dev = dev; + skb_put(tp->Rpl[i].Skb, tp->MaxPacketSize); + + /* data unreachable for DMA ? then use local buffer */ + dmabuf = pci_map_single(tp->pdev, tp->Rpl[i].Skb->data, tp->MaxPacketSize, PCI_DMA_FROMDEVICE); + if(tp->dmalimit && (dmabuf + tp->MaxPacketSize > tp->dmalimit)) + { + tp->Rpl[i].SkbStat = SKB_DATA_COPY; + tp->Rpl[i].FragList[0].DataAddr = htonl(((char *)tp->LocalRxBuffers[i] - (char *)tp) + tp->dmabuffer); + tp->Rpl[i].MData = tp->LocalRxBuffers[i]; + } + else /* DMA directly in skb->data */ + { + tp->Rpl[i].SkbStat = SKB_DMA_DIRECT; + tp->Rpl[i].FragList[0].DataAddr = htonl(dmabuf); + tp->Rpl[i].MData = tp->Rpl[i].Skb->data; + tp->Rpl[i].DMABuff = dmabuf; + } + } + + tp->Rpl[i].NextRPLPtr = &tp->Rpl[(i+1) % RPL_NUM]; + tp->Rpl[i].RPLIndex = i; + } + + tp->RplHead = &tp->Rpl[0]; + tp->RplTail = &tp->Rpl[RPL_NUM-1]; + tp->RplTail->Status = (RX_START_FRAME | RX_END_FRAME | RX_FRAME_IRQ); + + return; +} + +/* + * Initializes the initialisation parameter block. + */ +static void tms380tr_init_ipb(struct net_local *tp) +{ + tp->ipb.Init_Options = BURST_MODE; + tp->ipb.CMD_Status_IV = 0; + tp->ipb.TX_IV = 0; + tp->ipb.RX_IV = 0; + tp->ipb.Ring_Status_IV = 0; + tp->ipb.SCB_Clear_IV = 0; + tp->ipb.Adapter_CHK_IV = 0; + tp->ipb.RX_Burst_Size = BURST_SIZE; + tp->ipb.TX_Burst_Size = BURST_SIZE; + tp->ipb.DMA_Abort_Thrhld = DMA_RETRIES; + tp->ipb.SCB_Addr = 0; + tp->ipb.SSB_Addr = 0; + + return; +} + +/* + * Initializes the open parameter block. + */ +static void tms380tr_init_opb(struct net_device *dev) +{ + struct net_local *tp; + unsigned long Addr; + unsigned short RplSize = RPL_SIZE; + unsigned short TplSize = TPL_SIZE; + unsigned short BufferSize = BUFFER_SIZE; + int i; + + tp = netdev_priv(dev); + + tp->ocpl.OPENOptions = 0; + tp->ocpl.OPENOptions |= ENABLE_FULL_DUPLEX_SELECTION; + tp->ocpl.FullDuplex = 0; + tp->ocpl.FullDuplex |= OPEN_FULL_DUPLEX_OFF; + + /* + * Set node address + * + * We go ahead and put it in the OPB even though on + * most of the generic adapters this isn't required. + * Its simpler this way. -- ASF + */ + for (i=0;i<6;i++) + tp->ocpl.NodeAddr[i] = ((unsigned char *)dev->dev_addr)[i]; + + tp->ocpl.GroupAddr = 0; + tp->ocpl.FunctAddr = 0; + tp->ocpl.RxListSize = cpu_to_be16((unsigned short)RplSize); + tp->ocpl.TxListSize = cpu_to_be16((unsigned short)TplSize); + tp->ocpl.BufSize = cpu_to_be16((unsigned short)BufferSize); + tp->ocpl.Reserved = 0; + tp->ocpl.TXBufMin = TX_BUF_MIN; + tp->ocpl.TXBufMax = TX_BUF_MAX; + + Addr = htonl(((char *)tp->ProductID - (char *)tp) + tp->dmabuffer); + + tp->ocpl.ProdIDAddr[0] = LOWORD(Addr); + tp->ocpl.ProdIDAddr[1] = HIWORD(Addr); + + return; +} + +/* + * Send OPEN command to adapter + */ +static void tms380tr_open_adapter(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + + if(tp->OpenCommandIssued) + return; + + tp->OpenCommandIssued = 1; + tms380tr_exec_cmd(dev, OC_OPEN); + + return; +} + +/* + * Clear the adapter's interrupt flag. Clear system interrupt enable + * (SINTEN): disable adapter to system interrupts. + */ +static void tms380tr_disable_interrupts(struct net_device *dev) +{ + SIFWRITEB(0, SIFACL); + + return; +} + +/* + * Set the adapter's interrupt flag. Set system interrupt enable + * (SINTEN): enable adapter to system interrupts. + */ +static void tms380tr_enable_interrupts(struct net_device *dev) +{ + SIFWRITEB(ACL_SINTEN, SIFACL); + + return; +} + +/* + * Put command in command queue, try to execute it. + */ +static void tms380tr_exec_cmd(struct net_device *dev, unsigned short Command) +{ + struct net_local *tp = netdev_priv(dev); + + tp->CMDqueue |= Command; + tms380tr_chk_outstanding_cmds(dev); + + return; +} + +static void tms380tr_timeout(struct net_device *dev) +{ + /* + * If we get here, some higher level has decided we are broken. + * There should really be a "kick me" function call instead. + * + * Resetting the token ring adapter takes a long time so just + * fake transmission time and go on trying. Our own timeout + * routine is in tms380tr_timer_chk() + */ + dev->trans_start = jiffies; + netif_wake_queue(dev); +} + +/* + * Gets skb from system, queues it and checks if it can be sent + */ +static int tms380tr_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + int err; + + err = tms380tr_hardware_send_packet(skb, dev); + if(tp->TplFree->NextTPLPtr->BusyFlag) + netif_stop_queue(dev); + return (err); +} + +/* + * Move frames into adapter tx queue + */ +static int tms380tr_hardware_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + TPL *tpl; + short length; + unsigned char *buf; + unsigned long flags; + int i; + dma_addr_t dmabuf, newbuf; + struct net_local *tp = netdev_priv(dev); + + /* Try to get a free TPL from the chain. + * + * NOTE: We *must* always leave one unused TPL in the chain, + * because otherwise the adapter might send frames twice. + */ + spin_lock_irqsave(&tp->lock, flags); + if(tp->TplFree->NextTPLPtr->BusyFlag) { /* No free TPL */ + if (tms380tr_debug > 0) + printk(KERN_DEBUG "%s: No free TPL\n", dev->name); + spin_unlock_irqrestore(&tp->lock, flags); + return 1; + } + + dmabuf = 0; + + /* Is buffer reachable for Busmaster-DMA? */ + + length = skb->len; + dmabuf = pci_map_single(tp->pdev, skb->data, length, PCI_DMA_TODEVICE); + if(tp->dmalimit && (dmabuf + length > tp->dmalimit)) { + /* Copy frame to local buffer */ + pci_unmap_single(tp->pdev, dmabuf, length, PCI_DMA_TODEVICE); + dmabuf = 0; + i = tp->TplFree->TPLIndex; + buf = tp->LocalTxBuffers[i]; + memcpy(buf, skb->data, length); + newbuf = ((char *)buf - (char *)tp) + tp->dmabuffer; + } + else { + /* Send direct from skb->data */ + newbuf = dmabuf; + buf = skb->data; + } + /* Source address in packet? */ + tms380tr_chk_src_addr(buf, dev->dev_addr); + tp->LastSendTime = jiffies; + tpl = tp->TplFree; /* Get the "free" TPL */ + tpl->BusyFlag = 1; /* Mark TPL as busy */ + tp->TplFree = tpl->NextTPLPtr; + + /* Save the skb for delayed return of skb to system */ + tpl->Skb = skb; + tpl->DMABuff = dmabuf; + tpl->FragList[0].DataCount = cpu_to_be16((unsigned short)length); + tpl->FragList[0].DataAddr = htonl(newbuf); + + /* Write the data length in the transmit list. */ + tpl->FrameSize = cpu_to_be16((unsigned short)length); + tpl->MData = buf; + + /* Transmit the frame and set the status values. */ + tms380tr_write_tpl_status(tpl, TX_VALID | TX_START_FRAME + | TX_END_FRAME | TX_PASS_SRC_ADDR + | TX_FRAME_IRQ); + + /* Let adapter send the frame. */ + tms380tr_exec_sifcmd(dev, CMD_TX_VALID); + spin_unlock_irqrestore(&tp->lock, flags); + + return 0; +} + +/* + * Write the given value to the 'Status' field of the specified TPL. + * NOTE: This function should be used whenever the status of any TPL must be + * modified by the driver, because the compiler may otherwise change the + * order of instructions such that writing the TPL status may be executed at + * an undesireable time. When this function is used, the status is always + * written when the function is called. + */ +static void tms380tr_write_tpl_status(TPL *tpl, unsigned int Status) +{ + tpl->Status = Status; +} + +static void tms380tr_chk_src_addr(unsigned char *frame, unsigned char *hw_addr) +{ + unsigned char SRBit; + + if((((unsigned long)frame[8]) & ~0x80) != 0) /* Compare 4 bytes */ + return; + if((unsigned short)frame[12] != 0) /* Compare 2 bytes */ + return; + + SRBit = frame[8] & 0x80; + memcpy(&frame[8], hw_addr, 6); + frame[8] |= SRBit; + + return; +} + +/* + * The timer routine: Check if adapter still open and working, reopen if not. + */ +static void tms380tr_timer_chk(unsigned long data) +{ + struct net_device *dev = (struct net_device*)data; + struct net_local *tp = netdev_priv(dev); + + if(tp->HaltInProgress) + return; + + tms380tr_chk_outstanding_cmds(dev); + if(time_before(tp->LastSendTime + SEND_TIMEOUT, jiffies) + && (tp->TplFree != tp->TplBusy)) + { + /* Anything to send, but stalled too long */ + tp->LastSendTime = jiffies; + tms380tr_exec_cmd(dev, OC_CLOSE); /* Does reopen automatically */ + } + + tp->timer.expires = jiffies + 2*HZ; + add_timer(&tp->timer); + + if(tp->AdapterOpenFlag || tp->ReOpenInProgress) + return; + tp->ReOpenInProgress = 1; + tms380tr_open_adapter(dev); + + return; +} + +/* + * The typical workload of the driver: Handle the network interface interrupts. + */ +irqreturn_t tms380tr_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + struct net_local *tp; + unsigned short irq_type; + int handled = 0; + + if(dev == NULL) { + printk(KERN_INFO "%s: irq %d for unknown device.\n", dev->name, irq); + return IRQ_NONE; + } + + tp = netdev_priv(dev); + + irq_type = SIFREADW(SIFSTS); + + while(irq_type & STS_SYSTEM_IRQ) { + handled = 1; + irq_type &= STS_IRQ_MASK; + + if(!tms380tr_chk_ssb(tp, irq_type)) { + printk(KERN_DEBUG "%s: DATA LATE occurred\n", dev->name); + break; + } + + switch(irq_type) { + case STS_IRQ_RECEIVE_STATUS: + tms380tr_reset_interrupt(dev); + tms380tr_rcv_status_irq(dev); + break; + + case STS_IRQ_TRANSMIT_STATUS: + /* Check if TRANSMIT.HALT command is complete */ + if(tp->ssb.Parm[0] & COMMAND_COMPLETE) { + tp->TransmitCommandActive = 0; + tp->TransmitHaltScheduled = 0; + + /* Issue a new transmit command. */ + tms380tr_exec_cmd(dev, OC_TRANSMIT); + } + + tms380tr_reset_interrupt(dev); + tms380tr_tx_status_irq(dev); + break; + + case STS_IRQ_COMMAND_STATUS: + /* The SSB contains status of last command + * other than receive/transmit. + */ + tms380tr_cmd_status_irq(dev); + break; + + case STS_IRQ_SCB_CLEAR: + /* The SCB is free for another command. */ + tp->ScbInUse = 0; + tms380tr_chk_outstanding_cmds(dev); + break; + + case STS_IRQ_RING_STATUS: + tms380tr_ring_status_irq(dev); + break; + + case STS_IRQ_ADAPTER_CHECK: + tms380tr_chk_irq(dev); + break; + + case STS_IRQ_LLC_STATUS: + printk(KERN_DEBUG "tms380tr: unexpected LLC status IRQ\n"); + break; + + case STS_IRQ_TIMER: + printk(KERN_DEBUG "tms380tr: unexpected Timer IRQ\n"); + break; + + case STS_IRQ_RECEIVE_PENDING: + printk(KERN_DEBUG "tms380tr: unexpected Receive Pending IRQ\n"); + break; + + default: + printk(KERN_DEBUG "Unknown Token Ring IRQ (0x%04x)\n", irq_type); + break; + } + + /* Reset system interrupt if not already done. */ + if(irq_type != STS_IRQ_TRANSMIT_STATUS + && irq_type != STS_IRQ_RECEIVE_STATUS) { + tms380tr_reset_interrupt(dev); + } + + irq_type = SIFREADW(SIFSTS); + } + + return IRQ_RETVAL(handled); +} + +/* + * Reset the INTERRUPT SYSTEM bit and issue SSB CLEAR command. + */ +static void tms380tr_reset_interrupt(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + SSB *ssb = &tp->ssb; + + /* + * [Workaround for "Data Late"] + * Set all fields of the SSB to well-defined values so we can + * check if the adapter has written the SSB. + */ + + ssb->STS = (unsigned short) -1; + ssb->Parm[0] = (unsigned short) -1; + ssb->Parm[1] = (unsigned short) -1; + ssb->Parm[2] = (unsigned short) -1; + + /* Free SSB by issuing SSB_CLEAR command after reading IRQ code + * and clear STS_SYSTEM_IRQ bit: enable adapter for further interrupts. + */ + tms380tr_exec_sifcmd(dev, CMD_SSB_CLEAR | CMD_CLEAR_SYSTEM_IRQ); + + return; +} + +/* + * Check if the SSB has actually been written by the adapter. + */ +static unsigned char tms380tr_chk_ssb(struct net_local *tp, unsigned short IrqType) +{ + SSB *ssb = &tp->ssb; /* The address of the SSB. */ + + /* C 0 1 2 INTERRUPT CODE + * - - - - -------------- + * 1 1 1 1 TRANSMIT STATUS + * 1 1 1 1 RECEIVE STATUS + * 1 ? ? 0 COMMAND STATUS + * 0 0 0 0 SCB CLEAR + * 1 1 0 0 RING STATUS + * 0 0 0 0 ADAPTER CHECK + * + * 0 = SSB field not affected by interrupt + * 1 = SSB field is affected by interrupt + * + * C = SSB ADDRESS +0: COMMAND + * 0 = SSB ADDRESS +2: STATUS 0 + * 1 = SSB ADDRESS +4: STATUS 1 + * 2 = SSB ADDRESS +6: STATUS 2 + */ + + /* Check if this interrupt does use the SSB. */ + + if(IrqType != STS_IRQ_TRANSMIT_STATUS + && IrqType != STS_IRQ_RECEIVE_STATUS + && IrqType != STS_IRQ_COMMAND_STATUS + && IrqType != STS_IRQ_RING_STATUS) + { + return (1); /* SSB not involved. */ + } + + /* Note: All fields of the SSB have been set to all ones (-1) after it + * has last been used by the software (see DriverIsr()). + * + * Check if the affected SSB fields are still unchanged. + */ + + if(ssb->STS == (unsigned short) -1) + return (0); /* Command field not yet available. */ + if(IrqType == STS_IRQ_COMMAND_STATUS) + return (1); /* Status fields not always affected. */ + if(ssb->Parm[0] == (unsigned short) -1) + return (0); /* Status 1 field not yet available. */ + if(IrqType == STS_IRQ_RING_STATUS) + return (1); /* Status 2 & 3 fields not affected. */ + + /* Note: At this point, the interrupt is either TRANSMIT or RECEIVE. */ + if(ssb->Parm[1] == (unsigned short) -1) + return (0); /* Status 2 field not yet available. */ + if(ssb->Parm[2] == (unsigned short) -1) + return (0); /* Status 3 field not yet available. */ + + return (1); /* All SSB fields have been written by the adapter. */ +} + +/* + * Evaluates the command results status in the SSB status field. + */ +static void tms380tr_cmd_status_irq(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + unsigned short ssb_cmd, ssb_parm_0; + unsigned short ssb_parm_1; + char *open_err = "Open error -"; + char *code_err = "Open code -"; + + /* Copy the ssb values to local variables */ + ssb_cmd = tp->ssb.STS; + ssb_parm_0 = tp->ssb.Parm[0]; + ssb_parm_1 = tp->ssb.Parm[1]; + + if(ssb_cmd == OPEN) + { + tp->Sleeping = 0; + if(!tp->ReOpenInProgress) + wake_up_interruptible(&tp->wait_for_tok_int); + + tp->OpenCommandIssued = 0; + tp->ScbInUse = 0; + + if((ssb_parm_0 & 0x00FF) == GOOD_COMPLETION) + { + /* Success, the adapter is open. */ + tp->LobeWireFaultLogged = 0; + tp->AdapterOpenFlag = 1; + tp->AdapterVirtOpenFlag = 1; + tp->TransmitCommandActive = 0; + tms380tr_exec_cmd(dev, OC_TRANSMIT); + tms380tr_exec_cmd(dev, OC_RECEIVE); + + if(tp->ReOpenInProgress) + tp->ReOpenInProgress = 0; + + return; + } + else /* The adapter did not open. */ + { + if(ssb_parm_0 & NODE_ADDR_ERROR) + printk(KERN_INFO "%s: Node address error\n", + dev->name); + if(ssb_parm_0 & LIST_SIZE_ERROR) + printk(KERN_INFO "%s: List size error\n", + dev->name); + if(ssb_parm_0 & BUF_SIZE_ERROR) + printk(KERN_INFO "%s: Buffer size error\n", + dev->name); + if(ssb_parm_0 & TX_BUF_COUNT_ERROR) + printk(KERN_INFO "%s: Tx buffer count error\n", + dev->name); + if(ssb_parm_0 & INVALID_OPEN_OPTION) + printk(KERN_INFO "%s: Invalid open option\n", + dev->name); + if(ssb_parm_0 & OPEN_ERROR) + { + /* Show the open phase. */ + switch(ssb_parm_0 & OPEN_PHASES_MASK) + { + case LOBE_MEDIA_TEST: + if(!tp->LobeWireFaultLogged) + { + tp->LobeWireFaultLogged = 1; + printk(KERN_INFO "%s: %s Lobe wire fault (check cable !).\n", dev->name, open_err); + } + tp->ReOpenInProgress = 1; + tp->AdapterOpenFlag = 0; + tp->AdapterVirtOpenFlag = 1; + tms380tr_open_adapter(dev); + return; + + case PHYSICAL_INSERTION: + printk(KERN_INFO "%s: %s Physical insertion.\n", dev->name, open_err); + break; + + case ADDRESS_VERIFICATION: + printk(KERN_INFO "%s: %s Address verification.\n", dev->name, open_err); + break; + + case PARTICIPATION_IN_RING_POLL: + printk(KERN_INFO "%s: %s Participation in ring poll.\n", dev->name, open_err); + break; + + case REQUEST_INITIALISATION: + printk(KERN_INFO "%s: %s Request initialisation.\n", dev->name, open_err); + break; + + case FULLDUPLEX_CHECK: + printk(KERN_INFO "%s: %s Full duplex check.\n", dev->name, open_err); + break; + + default: + printk(KERN_INFO "%s: %s Unknown open phase\n", dev->name, open_err); + break; + } + + /* Show the open errors. */ + switch(ssb_parm_0 & OPEN_ERROR_CODES_MASK) + { + case OPEN_FUNCTION_FAILURE: + printk(KERN_INFO "%s: %s OPEN_FUNCTION_FAILURE", dev->name, code_err); + tp->LastOpenStatus = + OPEN_FUNCTION_FAILURE; + break; + + case OPEN_SIGNAL_LOSS: + printk(KERN_INFO "%s: %s OPEN_SIGNAL_LOSS\n", dev->name, code_err); + tp->LastOpenStatus = + OPEN_SIGNAL_LOSS; + break; + + case OPEN_TIMEOUT: + printk(KERN_INFO "%s: %s OPEN_TIMEOUT\n", dev->name, code_err); + tp->LastOpenStatus = + OPEN_TIMEOUT; + break; + + case OPEN_RING_FAILURE: + printk(KERN_INFO "%s: %s OPEN_RING_FAILURE\n", dev->name, code_err); + tp->LastOpenStatus = + OPEN_RING_FAILURE; + break; + + case OPEN_RING_BEACONING: + printk(KERN_INFO "%s: %s OPEN_RING_BEACONING\n", dev->name, code_err); + tp->LastOpenStatus = + OPEN_RING_BEACONING; + break; + + case OPEN_DUPLICATE_NODEADDR: + printk(KERN_INFO "%s: %s OPEN_DUPLICATE_NODEADDR\n", dev->name, code_err); + tp->LastOpenStatus = + OPEN_DUPLICATE_NODEADDR; + break; + + case OPEN_REQUEST_INIT: + printk(KERN_INFO "%s: %s OPEN_REQUEST_INIT\n", dev->name, code_err); + tp->LastOpenStatus = + OPEN_REQUEST_INIT; + break; + + case OPEN_REMOVE_RECEIVED: + printk(KERN_INFO "%s: %s OPEN_REMOVE_RECEIVED", dev->name, code_err); + tp->LastOpenStatus = + OPEN_REMOVE_RECEIVED; + break; + + case OPEN_FULLDUPLEX_SET: + printk(KERN_INFO "%s: %s OPEN_FULLDUPLEX_SET\n", dev->name, code_err); + tp->LastOpenStatus = + OPEN_FULLDUPLEX_SET; + break; + + default: + printk(KERN_INFO "%s: %s Unknown open err code", dev->name, code_err); + tp->LastOpenStatus = + OPEN_FUNCTION_FAILURE; + break; + } + } + + tp->AdapterOpenFlag = 0; + tp->AdapterVirtOpenFlag = 0; + + return; + } + } + else + { + if(ssb_cmd != READ_ERROR_LOG) + return; + + /* Add values from the error log table to the MAC + * statistics counters and update the errorlogtable + * memory. + */ + tp->MacStat.line_errors += tp->errorlogtable.Line_Error; + tp->MacStat.burst_errors += tp->errorlogtable.Burst_Error; + tp->MacStat.A_C_errors += tp->errorlogtable.ARI_FCI_Error; + tp->MacStat.lost_frames += tp->errorlogtable.Lost_Frame_Error; + tp->MacStat.recv_congest_count += tp->errorlogtable.Rx_Congest_Error; + tp->MacStat.rx_errors += tp->errorlogtable.Rx_Congest_Error; + tp->MacStat.frame_copied_errors += tp->errorlogtable.Frame_Copied_Error; + tp->MacStat.token_errors += tp->errorlogtable.Token_Error; + tp->MacStat.dummy1 += tp->errorlogtable.DMA_Bus_Error; + tp->MacStat.dummy1 += tp->errorlogtable.DMA_Parity_Error; + tp->MacStat.abort_delimiters += tp->errorlogtable.AbortDelimeters; + tp->MacStat.frequency_errors += tp->errorlogtable.Frequency_Error; + tp->MacStat.internal_errors += tp->errorlogtable.Internal_Error; + } + + return; +} + +/* + * The inverse routine to tms380tr_open(). + */ +int tms380tr_close(struct net_device *dev) +{ + struct net_local *tp = netdev_priv(dev); + netif_stop_queue(dev); + + del_timer(&tp->timer); + + /* Flush the Tx and disable Rx here. */ + + tp->Hal |