/*
   * pcilynx.c - Texas Instruments PCILynx driver
   * Copyright (C) 1999,2000 Andreas Bombe <andreas.bombe@munich.netsurf.de>,
   *                         Stephan Linz <linz@mazet.de>
   *                         Manfred Weihs <weihs@ict.tuwien.ac.at>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software Foundation,
   * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
   */
  
  /*
   * Contributions:
   *
   * Manfred Weihs <weihs@ict.tuwien.ac.at>
   *        reading bus info block (containing GUID) from serial
   *            eeprom via i2c and storing it in config ROM
   *        Reworked code for initiating bus resets
   *            (long, short, with or without hold-off)
   *        Enhancements in async and iso send code
   */

  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/interrupt.h>
  #include <linux/wait.h>
  #include <linux/errno.h>
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/init.h>
  #include <linux/pci.h>
  #include <linux/fs.h>
  #include <linux/poll.h>
  #include <linux/kdev_t.h>

  #include <linux/dma-mapping.h>

  #include <asm/byteorder.h>
  #include <asm/atomic.h>
  #include <asm/io.h>
  #include <asm/uaccess.h>
  #include <asm/irq.h>
  
  #include "csr1212.h"
  #include "ieee1394.h"
  #include "ieee1394_types.h"
  #include "hosts.h"
  #include "ieee1394_core.h"
  #include "highlevel.h"
  #include "pcilynx.h"
  
  #include <linux/i2c.h>
  #include <linux/i2c-algo-bit.h>
  
  /* print general (card independent) information */
  #define PRINT_G(level, fmt, args...) printk(level "pcilynx: " fmt "
  " , ## args)
  /* print card specific information */
  #define PRINT(level, card, fmt, args...) printk(level "pcilynx%d: " fmt "
  " , card , ## args)
  
  #ifdef CONFIG_IEEE1394_VERBOSEDEBUG
  #define PRINT_GD(level, fmt, args...) printk(level "pcilynx: " fmt "
  " , ## args)
  #define PRINTD(level, card, fmt, args...) printk(level "pcilynx%d: " fmt "
  " , card , ## args)
  #else
  #define PRINT_GD(level, fmt, args...) do {} while (0)
  #define PRINTD(level, card, fmt, args...) do {} while (0)
  #endif
  
  
  /* Module Parameters */

  static int skip_eeprom;

  module_param(skip_eeprom, int, 0444);
  MODULE_PARM_DESC(skip_eeprom, "Use generic bus info block instead of serial eeprom (default = 0).");
  
  
  static struct hpsb_host_driver lynx_driver;
  static unsigned int card_id;
  
  
  
  /*
   * I2C stuff
   */
  
  /* the i2c stuff was inspired by i2c-philips-par.c */
  
  static void bit_setscl(void *data, int state)
  {
  	if (state) {
  		  ((struct ti_lynx *) data)->i2c_driven_state |= 0x00000040;
  	} else {
  		  ((struct ti_lynx *) data)->i2c_driven_state &= ~0x00000040;
  	}
  	reg_write((struct ti_lynx *) data, SERIAL_EEPROM_CONTROL, ((struct ti_lynx *) data)->i2c_driven_state);
  }
  
  static void bit_setsda(void *data, int state)
  {
  	if (state) {
  		  ((struct ti_lynx *) data)->i2c_driven_state |= 0x00000010;
  	} else {
  		  ((struct ti_lynx *) data)->i2c_driven_state &= ~0x00000010;
  	}
  	reg_write((struct ti_lynx *) data, SERIAL_EEPROM_CONTROL, ((struct ti_lynx *) data)->i2c_driven_state);
  }
  
  static int bit_getscl(void *data)
  {
  	return reg_read((struct ti_lynx *) data, SERIAL_EEPROM_CONTROL) & 0x00000040;
  }
  
  static int bit_getsda(void *data)
  {
  	return reg_read((struct ti_lynx *) data, SERIAL_EEPROM_CONTROL) & 0x00000010;
  }

  static struct i2c_algo_bit_data bit_data = {
  	.setsda			= bit_setsda,
  	.setscl			= bit_setscl,
  	.getsda			= bit_getsda,
  	.getscl			= bit_getscl,
  	.udelay			= 5,

  	.timeout		= 100,
  };

  
  /*
   * PCL handling functions.
   */
  
  static pcl_t alloc_pcl(struct ti_lynx *lynx)
  {
          u8 m;
          int i, j;
  
          spin_lock(&lynx->lock);
          /* FIXME - use ffz() to make this readable */
          for (i = 0; i < (LOCALRAM_SIZE / 1024); i++) {
                  m = lynx->pcl_bmap[i];
                  for (j = 0; j < 8; j++) {
                          if (m & 1<<j) {
                                  continue;
                          }
                          m |= 1<<j;
                          lynx->pcl_bmap[i] = m;
                          spin_unlock(&lynx->lock);
                          return 8 * i + j;
                  }
          }
          spin_unlock(&lynx->lock);
  
          return -1;
  }
  
  
  #if 0
  static void free_pcl(struct ti_lynx *lynx, pcl_t pclid)
  {
          int off, bit;
  
          off = pclid / 8;
          bit = pclid % 8;
  
          if (pclid < 0) {
                  return;
          }
  
          spin_lock(&lynx->lock);
          if (lynx->pcl_bmap[off] & 1<<bit) {
                  lynx->pcl_bmap[off] &= ~(1<<bit);
          } else {
                  PRINT(KERN_ERR, lynx->id,
                        "attempted to free unallocated PCL %d", pclid);
          }
          spin_unlock(&lynx->lock);
  }
  
  /* functions useful for debugging */
  static void pretty_print_pcl(const struct ti_pcl *pcl)
  {
          int i;
  
          printk("PCL next %08x, userdata %08x, status %08x, remtrans %08x, nextbuf %08x
  ",
                 pcl->next, pcl->user_data, pcl->pcl_status,
                 pcl->remaining_transfer_count, pcl->next_data_buffer);
  
          printk("PCL");
          for (i=0; i<13; i++) {
                  printk(" c%x:%08x d%x:%08x",
                         i, pcl->buffer[i].control, i, pcl->buffer[i].pointer);
                  if (!(i & 0x3) && (i != 12)) printk("
  PCL");
          }
          printk("
  ");
  }
  
  static void print_pcl(const struct ti_lynx *lynx, pcl_t pclid)
  {
          struct ti_pcl pcl;
  
          get_pcl(lynx, pclid, &pcl);
          pretty_print_pcl(&pcl);
  }
  #endif
  
  
  
  /***********************************
   * IEEE-1394 functionality section *
   ***********************************/
  
  
  static int get_phy_reg(struct ti_lynx *lynx, int addr)
  {
          int retval;
          int i = 0;
  
          unsigned long flags;
  
          if (addr > 15) {
                  PRINT(KERN_ERR, lynx->id,
                        "%s: PHY register address %d out of range",

  		      __func__, addr);

                  return -1;
          }
  
          spin_lock_irqsave(&lynx->phy_reg_lock, flags);
  
          reg_write(lynx, LINK_PHY, LINK_PHY_READ | LINK_PHY_ADDR(addr));
          do {
                  retval = reg_read(lynx, LINK_PHY);
  
                  if (i > 10000) {
                          PRINT(KERN_ERR, lynx->id, "%s: runaway loop, aborting",

  			      __func__);

                          retval = -1;
                          break;
                  }
                  i++;
          } while ((retval & 0xf00) != LINK_PHY_RADDR(addr));
  
          reg_write(lynx, LINK_INT_STATUS, LINK_INT_PHY_REG_RCVD);
          spin_unlock_irqrestore(&lynx->phy_reg_lock, flags);
  
          if (retval != -1) {
                  return retval & 0xff;
          } else {
                  return -1;
          }
  }
  
  static int set_phy_reg(struct ti_lynx *lynx, int addr, int val)
  {
          unsigned long flags;
  
          if (addr > 15) {
                  PRINT(KERN_ERR, lynx->id,

  		      "%s: PHY register address %d out of range", __func__, addr);

                  return -1;
          }
  
          if (val > 0xff) {
                  PRINT(KERN_ERR, lynx->id,

  		      "%s: PHY register value %d out of range", __func__, val);

                  return -1;
          }
  
          spin_lock_irqsave(&lynx->phy_reg_lock, flags);
  
          reg_write(lynx, LINK_PHY, LINK_PHY_WRITE | LINK_PHY_ADDR(addr)
                    | LINK_PHY_WDATA(val));
  
          spin_unlock_irqrestore(&lynx->phy_reg_lock, flags);
  
          return 0;
  }
  
  static int sel_phy_reg_page(struct ti_lynx *lynx, int page)
  {
          int reg;
  
          if (page > 7) {
                  PRINT(KERN_ERR, lynx->id,

  		      "%s: PHY page %d out of range", __func__, page);

                  return -1;
          }
  
          reg = get_phy_reg(lynx, 7);
          if (reg != -1) {
                  reg &= 0x1f;
                  reg |= (page << 5);
                  set_phy_reg(lynx, 7, reg);
                  return 0;
          } else {
                  return -1;
          }
  }
  
  #if 0 /* not needed at this time */
  static int sel_phy_reg_port(struct ti_lynx *lynx, int port)
  {
          int reg;
  
          if (port > 15) {
                  PRINT(KERN_ERR, lynx->id,

  		      "%s: PHY port %d out of range", __func__, port);

                  return -1;
          }
  
          reg = get_phy_reg(lynx, 7);
          if (reg != -1) {
                  reg &= 0xf0;
                  reg |= port;
                  set_phy_reg(lynx, 7, reg);
                  return 0;
          } else {
                  return -1;
          }
  }
  #endif
  
  static u32 get_phy_vendorid(struct ti_lynx *lynx)
  {
          u32 pvid = 0;
          sel_phy_reg_page(lynx, 1);
          pvid |= (get_phy_reg(lynx, 10) << 16);
          pvid |= (get_phy_reg(lynx, 11) << 8);
          pvid |= get_phy_reg(lynx, 12);
          PRINT(KERN_INFO, lynx->id, "PHY vendor id 0x%06x", pvid);
          return pvid;
  }
  
  static u32 get_phy_productid(struct ti_lynx *lynx)
  {
          u32 id = 0;
          sel_phy_reg_page(lynx, 1);
          id |= (get_phy_reg(lynx, 13) << 16);
          id |= (get_phy_reg(lynx, 14) << 8);
          id |= get_phy_reg(lynx, 15);
          PRINT(KERN_INFO, lynx->id, "PHY product id 0x%06x", id);
          return id;
  }
  
  static quadlet_t generate_own_selfid(struct ti_lynx *lynx,
                                       struct hpsb_host *host)
  {
          quadlet_t lsid;
          char phyreg[7];
          int i;
  
          phyreg[0] = lynx->phy_reg0;
          for (i = 1; i < 7; i++) {
                  phyreg[i] = get_phy_reg(lynx, i);
          }
  
          /* FIXME? We assume a TSB21LV03A phy here.  This code doesn't support
             more than 3 ports on the PHY anyway. */
  
          lsid = 0x80400000 | ((phyreg[0] & 0xfc) << 22);
          lsid |= (phyreg[1] & 0x3f) << 16; /* gap count */
          lsid |= (phyreg[2] & 0xc0) << 8; /* max speed */
  	if (!hpsb_disable_irm)
  		lsid |= (phyreg[6] & 0x01) << 11; /* contender (phy dependent) */
          /* lsid |= 1 << 11; *//* set contender (hack) */
          lsid |= (phyreg[6] & 0x10) >> 3; /* initiated reset */
  
          for (i = 0; i < (phyreg[2] & 0xf); i++) { /* ports */
                  if (phyreg[3 + i] & 0x4) {
                          lsid |= (((phyreg[3 + i] & 0x8) | 0x10) >> 3)
                                  << (6 - i*2);
                  } else {
                          lsid |= 1 << (6 - i*2);
                  }
          }
  
          cpu_to_be32s(&lsid);
          PRINT(KERN_DEBUG, lynx->id, "generated own selfid 0x%x", lsid);
          return lsid;
  }
  
  static void handle_selfid(struct ti_lynx *lynx, struct hpsb_host *host)
  {
          quadlet_t *q = lynx->rcv_page;
          int phyid, isroot, size;
          quadlet_t lsid = 0;
          int i;
  
          if (lynx->phy_reg0 == -1 || lynx->selfid_size == -1) return;
  
          size = lynx->selfid_size;
          phyid = lynx->phy_reg0;
  
          i = (size > 16 ? 16 : size) / 4 - 1;
          while (i >= 0) {
                  cpu_to_be32s(&q[i]);
                  i--;
          }
  
          if (!lynx->phyic.reg_1394a) {
                  lsid = generate_own_selfid(lynx, host);
          }
  
          isroot = (phyid & 2) != 0;
          phyid >>= 2;
          PRINT(KERN_INFO, lynx->id, "SelfID process finished (phyid %d, %s)",
                phyid, (isroot ? "root" : "not root"));
          reg_write(lynx, LINK_ID, (0xffc0 | phyid) << 16);
  
          if (!lynx->phyic.reg_1394a && !size) {
                  hpsb_selfid_received(host, lsid);
          }
  
          while (size > 0) {
                  struct selfid *sid = (struct selfid *)q;
  
                  if (!lynx->phyic.reg_1394a && !sid->extended
                      && (sid->phy_id == (phyid + 1))) {
                          hpsb_selfid_received(host, lsid);
                  }
  
                  if (q[0] == ~q[1]) {
                          PRINT(KERN_DEBUG, lynx->id, "SelfID packet 0x%x rcvd",
                                q[0]);
                          hpsb_selfid_received(host, q[0]);
                  } else {
                          PRINT(KERN_INFO, lynx->id,
                                "inconsistent selfid 0x%x/0x%x", q[0], q[1]);
                  }
                  q += 2;
                  size -= 8;
          }
  
          if (!lynx->phyic.reg_1394a && isroot && phyid != 0) {
                  hpsb_selfid_received(host, lsid);
          }
  
          hpsb_selfid_complete(host, phyid, isroot);
  
          if (host->in_bus_reset) return; /* in bus reset again */
  
          if (isroot) reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_CYCMASTER); //FIXME: I do not think, we need this here
          reg_set_bits(lynx, LINK_CONTROL,
                       LINK_CONTROL_RCV_CMP_VALID | LINK_CONTROL_TX_ASYNC_EN
                       | LINK_CONTROL_RX_ASYNC_EN | LINK_CONTROL_CYCTIMEREN);
  }
  
  
  
  /* This must be called with the respective queue_lock held. */
  static void send_next(struct ti_lynx *lynx, int what)
  {
          struct ti_pcl pcl;
          struct lynx_send_data *d;
          struct hpsb_packet *packet;

  #if 0 /* has been removed from ieee1394 core */

          d = (what == hpsb_iso ? &lynx->iso_send : &lynx->async);

  #else
  	d = &lynx->async;
  #endif

          if (!list_empty(&d->pcl_queue)) {
                  PRINT(KERN_ERR, lynx->id, "trying to queue a new packet in nonempty fifo");
                  BUG();
          }
  
          packet = driver_packet(d->queue.next);
  	list_move_tail(&packet->driver_list, &d->pcl_queue);
  
          d->header_dma = pci_map_single(lynx->dev, packet->header,
                                         packet->header_size, PCI_DMA_TODEVICE);
          if (packet->data_size) {
                  d->data_dma = pci_map_single(lynx->dev, packet->data,
                                               packet->data_size,
                                               PCI_DMA_TODEVICE);
          } else {
                  d->data_dma = 0;
          }
  
          pcl.next = PCL_NEXT_INVALID;
          pcl.async_error_next = PCL_NEXT_INVALID;
          pcl.pcl_status = 0;
          pcl.buffer[0].control = packet->speed_code << 14 | packet->header_size;
  #ifndef __BIG_ENDIAN
          pcl.buffer[0].control |= PCL_BIGENDIAN;
  #endif
          pcl.buffer[0].pointer = d->header_dma;
          pcl.buffer[1].control = PCL_LAST_BUFF | packet->data_size;
          pcl.buffer[1].pointer = d->data_dma;
  
          switch (packet->type) {
          case hpsb_async:
                  pcl.buffer[0].control |= PCL_CMD_XMT;
                  break;

  #if 0 /* has been removed from ieee1394 core */

          case hpsb_iso:
                  pcl.buffer[0].control |= PCL_CMD_XMT | PCL_ISOMODE;
                  break;

  #endif

          case hpsb_raw:
                  pcl.buffer[0].control |= PCL_CMD_UNFXMT;
                  break;
          }
  
          put_pcl(lynx, d->pcl, &pcl);
          run_pcl(lynx, d->pcl_start, d->channel);
  }
  
  
  /* called from subsystem core */
  static int lynx_transmit(struct hpsb_host *host, struct hpsb_packet *packet)
  {
          struct ti_lynx *lynx = host->hostdata;
          struct lynx_send_data *d;
          unsigned long flags;
  
          if (packet->data_size >= 4096) {
                  PRINT(KERN_ERR, lynx->id, "transmit packet data too big (%Zd)",
                        packet->data_size);
                  return -EOVERFLOW;
          }
  
          switch (packet->type) {
          case hpsb_async:
          case hpsb_raw:
                  d = &lynx->async;
                  break;

  #if 0 /* has been removed from ieee1394 core */

          case hpsb_iso:
                  d = &lynx->iso_send;
                  break;

  #endif

          default:
                  PRINT(KERN_ERR, lynx->id, "invalid packet type %d",
                        packet->type);
                  return -EINVAL;
          }
  
          if (packet->tcode == TCODE_WRITEQ
              || packet->tcode == TCODE_READQ_RESPONSE) {
                  cpu_to_be32s(&packet->header[3]);
          }
  
          spin_lock_irqsave(&d->queue_lock, flags);
  
  	list_add_tail(&packet->driver_list, &d->queue);
  	if (list_empty(&d->pcl_queue))
                  send_next(lynx, packet->type);
  
          spin_unlock_irqrestore(&d->queue_lock, flags);
  
          return 0;
  }
  
  
  /* called from subsystem core */
  static int lynx_devctl(struct hpsb_host *host, enum devctl_cmd cmd, int arg)
  {
          struct ti_lynx *lynx = host->hostdata;
          int retval = 0;
          struct hpsb_packet *packet;
  	LIST_HEAD(packet_list);
          unsigned long flags;
  	int phy_reg;
  
          switch (cmd) {
          case RESET_BUS:
                  if (reg_read(lynx, LINK_INT_STATUS) & LINK_INT_PHY_BUSRESET) {
                          retval = 0;
                          break;
                  }
  
  		switch (arg) {
  		case SHORT_RESET:
  			if (lynx->phyic.reg_1394a) {
  				phy_reg = get_phy_reg(lynx, 5);
  				if (phy_reg == -1) {
  					PRINT(KERN_ERR, lynx->id, "cannot reset bus, because read phy reg failed");
  					retval = -1;
  					break;
  				}
  				phy_reg |= 0x40;
  
  				PRINT(KERN_INFO, lynx->id, "resetting bus (short bus reset) on request");
  
  				lynx->selfid_size = -1;
  				lynx->phy_reg0 = -1;
  				set_phy_reg(lynx, 5, phy_reg); /* set ISBR */
  				break;
  			} else {
  				PRINT(KERN_INFO, lynx->id, "cannot do short bus reset, because of old phy");
  				/* fall through to long bus reset */
  			}
  		case LONG_RESET:
  			phy_reg = get_phy_reg(lynx, 1);
  			if (phy_reg == -1) {
  				PRINT(KERN_ERR, lynx->id, "cannot reset bus, because read phy reg failed");
  				retval = -1;
  				break;
  			}
  			phy_reg |= 0x40;
  
  			PRINT(KERN_INFO, lynx->id, "resetting bus (long bus reset) on request");
  
  			lynx->selfid_size = -1;
  			lynx->phy_reg0 = -1;
  			set_phy_reg(lynx, 1, phy_reg); /* clear RHB, set IBR */
  			break;
  		case SHORT_RESET_NO_FORCE_ROOT:
  			if (lynx->phyic.reg_1394a) {
  				phy_reg = get_phy_reg(lynx, 1);
  				if (phy_reg == -1) {
  					PRINT(KERN_ERR, lynx->id, "cannot reset bus, because read phy reg failed");
  					retval = -1;
  					break;
  				}
  				if (phy_reg & 0x80) {
  					phy_reg &= ~0x80;
  					set_phy_reg(lynx, 1, phy_reg); /* clear RHB */
  				}
  
  				phy_reg = get_phy_reg(lynx, 5);
  				if (phy_reg == -1) {
  					PRINT(KERN_ERR, lynx->id, "cannot reset bus, because read phy reg failed");
  					retval = -1;
  					break;
  				}
  				phy_reg |= 0x40;
  
  				PRINT(KERN_INFO, lynx->id, "resetting bus (short bus reset, no force_root) on request");
  
  				lynx->selfid_size = -1;
  				lynx->phy_reg0 = -1;
  				set_phy_reg(lynx, 5, phy_reg); /* set ISBR */
  				break;
  			} else {
  				PRINT(KERN_INFO, lynx->id, "cannot do short bus reset, because of old phy");
  				/* fall through to long bus reset */
  			}
  		case LONG_RESET_NO_FORCE_ROOT:
  			phy_reg = get_phy_reg(lynx, 1);
  			if (phy_reg == -1) {
  				PRINT(KERN_ERR, lynx->id, "cannot reset bus, because read phy reg failed");
  				retval = -1;
  				break;
  			}
  			phy_reg &= ~0x80;
  			phy_reg |= 0x40;
  
  			PRINT(KERN_INFO, lynx->id, "resetting bus (long bus reset, no force_root) on request");
  
  			lynx->selfid_size = -1;
  			lynx->phy_reg0 = -1;
  			set_phy_reg(lynx, 1, phy_reg); /* clear RHB, set IBR */
  			break;
  		case SHORT_RESET_FORCE_ROOT:
  			if (lynx->phyic.reg_1394a) {
  				phy_reg = get_phy_reg(lynx, 1);
  				if (phy_reg == -1) {
  					PRINT(KERN_ERR, lynx->id, "cannot reset bus, because read phy reg failed");
  					retval = -1;
  					break;
  				}
  				if (!(phy_reg & 0x80)) {
  					phy_reg |= 0x80;
  					set_phy_reg(lynx, 1, phy_reg); /* set RHB */
  				}
  
  				phy_reg = get_phy_reg(lynx, 5);
  				if (phy_reg == -1) {
  					PRINT(KERN_ERR, lynx->id, "cannot reset bus, because read phy reg failed");
  					retval = -1;
  					break;
  				}
  				phy_reg |= 0x40;
  
  				PRINT(KERN_INFO, lynx->id, "resetting bus (short bus reset, force_root set) on request");
  
  				lynx->selfid_size = -1;
  				lynx->phy_reg0 = -1;
  				set_phy_reg(lynx, 5, phy_reg); /* set ISBR */
  				break;
  			} else {
  				PRINT(KERN_INFO, lynx->id, "cannot do short bus reset, because of old phy");
  				/* fall through to long bus reset */
  			}
  		case LONG_RESET_FORCE_ROOT:
  			phy_reg = get_phy_reg(lynx, 1);
  			if (phy_reg == -1) {
  				PRINT(KERN_ERR, lynx->id, "cannot reset bus, because read phy reg failed");
  				retval = -1;
  				break;
  			}
  			phy_reg |= 0xc0;
  
  			PRINT(KERN_INFO, lynx->id, "resetting bus (long bus reset, force_root set) on request");
  
  			lynx->selfid_size = -1;
  			lynx->phy_reg0 = -1;
  			set_phy_reg(lynx, 1, phy_reg); /* set IBR and RHB */
  			break;
  		default:
  			PRINT(KERN_ERR, lynx->id, "unknown argument for reset_bus command %d", arg);
  			retval = -1;
  		}
  
                  break;
  
          case GET_CYCLE_COUNTER:
                  retval = reg_read(lynx, CYCLE_TIMER);
                  break;
  
          case SET_CYCLE_COUNTER:
                  reg_write(lynx, CYCLE_TIMER, arg);
                  break;
  
          case SET_BUS_ID:
                  reg_write(lynx, LINK_ID,
                            (arg << 22) | (reg_read(lynx, LINK_ID) & 0x003f0000));
                  break;
  
          case ACT_CYCLE_MASTER:
                  if (arg) {
                          reg_set_bits(lynx, LINK_CONTROL,
                                       LINK_CONTROL_CYCMASTER);
                  } else {
                          reg_clear_bits(lynx, LINK_CONTROL,
                                         LINK_CONTROL_CYCMASTER);
                  }
                  break;
  
          case CANCEL_REQUESTS:
                  spin_lock_irqsave(&lynx->async.queue_lock, flags);
  
                  reg_write(lynx, DMA_CHAN_CTRL(CHANNEL_ASYNC_SEND), 0);

  		list_splice_init(&lynx->async.queue, &packet_list);

  
                  if (list_empty(&lynx->async.pcl_queue)) {
                          spin_unlock_irqrestore(&lynx->async.queue_lock, flags);
                          PRINTD(KERN_DEBUG, lynx->id, "no async packet in PCL to cancel");
                  } else {
                          struct ti_pcl pcl;
                          u32 ack;

  
                          PRINT(KERN_INFO, lynx->id, "cancelling async packet, that was already in PCL");
  
                          get_pcl(lynx, lynx->async.pcl, &pcl);
  
                          packet = driver_packet(lynx->async.pcl_queue.next);
  			list_del_init(&packet->driver_list);
  
                          pci_unmap_single(lynx->dev, lynx->async.header_dma,
                                           packet->header_size, PCI_DMA_TODEVICE);
                          if (packet->data_size) {
                                  pci_unmap_single(lynx->dev, lynx->async.data_dma,
                                                   packet->data_size, PCI_DMA_TODEVICE);
                          }
  
                          spin_unlock_irqrestore(&lynx->async.queue_lock, flags);
  
                          if (pcl.pcl_status & DMA_CHAN_STAT_PKTCMPL) {
                                  if (pcl.pcl_status & DMA_CHAN_STAT_SPECIALACK) {
                                          ack = (pcl.pcl_status >> 15) & 0xf;
                                          PRINTD(KERN_INFO, lynx->id, "special ack %d", ack);
                                          ack = (ack == 1 ? ACKX_TIMEOUT : ACKX_SEND_ERROR);
                                  } else {
                                          ack = (pcl.pcl_status >> 15) & 0xf;
                                  }
                          } else {
                                  PRINT(KERN_INFO, lynx->id, "async packet was not completed");
                                  ack = ACKX_ABORTED;
                          }
                          hpsb_packet_sent(host, packet, ack);
                  }
  
  		while (!list_empty(&packet_list)) {
  			packet = driver_packet(packet_list.next);
  			list_del_init(&packet->driver_list);
  			hpsb_packet_sent(host, packet, ACKX_ABORTED);
  		}
  
                  break;

  #if 0 /* has been removed from ieee1394 core */

          case ISO_LISTEN_CHANNEL:
                  spin_lock_irqsave(&lynx->iso_rcv.lock, flags);
  
                  if (lynx->iso_rcv.chan_count++ == 0) {
                          reg_write(lynx, DMA_WORD1_CMP_ENABLE(CHANNEL_ISO_RCV),
                                    DMA_WORD1_CMP_ENABLE_MASTER);
                  }
  
                  spin_unlock_irqrestore(&lynx->iso_rcv.lock, flags);
                  break;
  
          case ISO_UNLISTEN_CHANNEL:
                  spin_lock_irqsave(&lynx->iso_rcv.lock, flags);
  
                  if (--lynx->iso_rcv.chan_count == 0) {
                          reg_write(lynx, DMA_WORD1_CMP_ENABLE(CHANNEL_ISO_RCV),
                                    0);
                  }
  
                  spin_unlock_irqrestore(&lynx->iso_rcv.lock, flags);
                  break;

  #endif

          default:
                  PRINT(KERN_ERR, lynx->id, "unknown devctl command %d", cmd);
                  retval = -1;
          }
  
          return retval;
  }
  
  
  /***************************************
   * IEEE-1394 functionality section END *
   ***************************************/

  
  /********************************************************
   * Global stuff (interrupt handler, init/shutdown code) *
   ********************************************************/

  static irqreturn_t lynx_irq_handler(int irq, void *dev_id)

  {
          struct ti_lynx *lynx = (struct ti_lynx *)dev_id;
          struct hpsb_host *host = lynx->host;
          u32 intmask;
          u32 linkint;
  
          linkint = reg_read(lynx, LINK_INT_STATUS);
          intmask = reg_read(lynx, PCI_INT_STATUS);
  
          if (!(intmask & PCI_INT_INT_PEND))
  		return IRQ_NONE;
  
          PRINTD(KERN_DEBUG, lynx->id, "interrupt: 0x%08x / 0x%08x", intmask,
                 linkint);
  
          reg_write(lynx, LINK_INT_STATUS, linkint);
          reg_write(lynx, PCI_INT_STATUS, intmask);

          if (intmask & PCI_INT_1394) {
                  if (linkint & LINK_INT_PHY_TIMEOUT) {
                          PRINT(KERN_INFO, lynx->id, "PHY timeout occurred");
                  }
                  if (linkint & LINK_INT_PHY_BUSRESET) {
                          PRINT(KERN_INFO, lynx->id, "bus reset interrupt");
                          lynx->selfid_size = -1;
                          lynx->phy_reg0 = -1;
                          if (!host->in_bus_reset)
                                  hpsb_bus_reset(host);
                  }
                  if (linkint & LINK_INT_PHY_REG_RCVD) {
                          u32 reg;
  
                          spin_lock(&lynx->phy_reg_lock);
                          reg = reg_read(lynx, LINK_PHY);
                          spin_unlock(&lynx->phy_reg_lock);
  
                          if (!host->in_bus_reset) {
                                  PRINT(KERN_INFO, lynx->id,
                                        "phy reg received without reset");
                          } else if (reg & 0xf00) {
                                  PRINT(KERN_INFO, lynx->id,
                                        "unsolicited phy reg %d received",
                                        (reg >> 8) & 0xf);
                          } else {
                                  lynx->phy_reg0 = reg & 0xff;
                                  handle_selfid(lynx, host);
                          }
                  }
                  if (linkint & LINK_INT_ISO_STUCK) {
                          PRINT(KERN_INFO, lynx->id, "isochronous transmitter stuck");
                  }
                  if (linkint & LINK_INT_ASYNC_STUCK) {
                          PRINT(KERN_INFO, lynx->id, "asynchronous transmitter stuck");
                  }
                  if (linkint & LINK_INT_SENT_REJECT) {
                          PRINT(KERN_INFO, lynx->id, "sent reject");
                  }
                  if (linkint & LINK_INT_TX_INVALID_TC) {
                          PRINT(KERN_INFO, lynx->id, "invalid transaction code");
                  }
                  if (linkint & LINK_INT_GRF_OVERFLOW) {
                          /* flush FIFO if overflow happens during reset */
                          if (host->in_bus_reset)
                                  reg_write(lynx, FIFO_CONTROL,
                                            FIFO_CONTROL_GRF_FLUSH);
                          PRINT(KERN_INFO, lynx->id, "GRF overflow");
                  }
                  if (linkint & LINK_INT_ITF_UNDERFLOW) {
                          PRINT(KERN_INFO, lynx->id, "ITF underflow");
                  }
                  if (linkint & LINK_INT_ATF_UNDERFLOW) {
                          PRINT(KERN_INFO, lynx->id, "ATF underflow");
                  }
          }
  
          if (intmask & PCI_INT_DMA_HLT(CHANNEL_ISO_RCV)) {
                  PRINTD(KERN_DEBUG, lynx->id, "iso receive");
  
                  spin_lock(&lynx->iso_rcv.lock);
  
                  lynx->iso_rcv.stat[lynx->iso_rcv.next] =
                          reg_read(lynx, DMA_CHAN_STAT(CHANNEL_ISO_RCV));
  
                  lynx->iso_rcv.used++;
                  lynx->iso_rcv.next = (lynx->iso_rcv.next + 1) % NUM_ISORCV_PCL;
  
                  if ((lynx->iso_rcv.next == lynx->iso_rcv.last)
                      || !lynx->iso_rcv.chan_count) {
                          PRINTD(KERN_DEBUG, lynx->id, "stopped");
                          reg_write(lynx, DMA_WORD1_CMP_ENABLE(CHANNEL_ISO_RCV), 0);
                  }
  
                  run_sub_pcl(lynx, lynx->iso_rcv.pcl_start, lynx->iso_rcv.next,
                              CHANNEL_ISO_RCV);
  
                  spin_unlock(&lynx->iso_rcv.lock);
  
  		tasklet_schedule(&lynx->iso_rcv.tq);
          }
  
          if (intmask & PCI_INT_DMA_HLT(CHANNEL_ASYNC_SEND)) {
                  PRINTD(KERN_DEBUG, lynx->id, "async sent");
                  spin_lock(&lynx->async.queue_lock);
  
                  if (list_empty(&lynx->async.pcl_queue)) {
                          spin_unlock(&lynx->async.queue_lock);
                          PRINT(KERN_WARNING, lynx->id, "async dma halted, but no queued packet (maybe it was cancelled)");
                  } else {
                          struct ti_pcl pcl;
                          u32 ack;
                          struct hpsb_packet *packet;
  
                          get_pcl(lynx, lynx->async.pcl, &pcl);
  
                          packet = driver_packet(lynx->async.pcl_queue.next);
                          list_del_init(&packet->driver_list);
  
                          pci_unmap_single(lynx->dev, lynx->async.header_dma,
                                           packet->header_size, PCI_DMA_TODEVICE);
                          if (packet->data_size) {
                                  pci_unmap_single(lynx->dev, lynx->async.data_dma,
                                                   packet->data_size, PCI_DMA_TODEVICE);
                          }
  
                          if (!list_empty(&lynx->async.queue)) {
                                  send_next(lynx, hpsb_async);
                          }
  
                          spin_unlock(&lynx->async.queue_lock);
  
                          if (pcl.pcl_status & DMA_CHAN_STAT_PKTCMPL) {
                                  if (pcl.pcl_status & DMA_CHAN_STAT_SPECIALACK) {
                                          ack = (pcl.pcl_status >> 15) & 0xf;
                                          PRINTD(KERN_INFO, lynx->id, "special ack %d", ack);
                                          ack = (ack == 1 ? ACKX_TIMEOUT : ACKX_SEND_ERROR);
                                  } else {
                                          ack = (pcl.pcl_status >> 15) & 0xf;
                                  }
                          } else {
                                  PRINT(KERN_INFO, lynx->id, "async packet was not completed");
                                  ack = ACKX_SEND_ERROR;
                          }
                          hpsb_packet_sent(host, packet, ack);
                  }
          }
  
          if (intmask & PCI_INT_DMA_HLT(CHANNEL_ISO_SEND)) {
                  PRINTD(KERN_DEBUG, lynx->id, "iso sent");
                  spin_lock(&lynx->iso_send.queue_lock);
  
                  if (list_empty(&lynx->iso_send.pcl_queue)) {
                          spin_unlock(&lynx->iso_send.queue_lock);
                          PRINT(KERN_ERR, lynx->id, "iso send dma halted, but no queued packet");
                  } else {
                          struct ti_pcl pcl;
                          u32 ack;
                          struct hpsb_packet *packet;
  
                          get_pcl(lynx, lynx->iso_send.pcl, &pcl);
  
                          packet = driver_packet(lynx->iso_send.pcl_queue.next);
                          list_del_init(&packet->driver_list);
  
                          pci_unmap_single(lynx->dev, lynx->iso_send.header_dma,
                                           packet->header_size, PCI_DMA_TODEVICE);
                          if (packet->data_size) {
                                  pci_unmap_single(lynx->dev, lynx->iso_send.data_dma,
                                                   packet->data_size, PCI_DMA_TODEVICE);
                          }

  #if 0 /* has been removed from ieee1394 core */

                          if (!list_empty(&lynx->iso_send.queue)) {
                                  send_next(lynx, hpsb_iso);
                          }

  #endif

                          spin_unlock(&lynx->iso_send.queue_lock);
  
                          if (pcl.pcl_status & DMA_CHAN_STAT_PKTCMPL) {
                                  if (pcl.pcl_status & DMA_CHAN_STAT_SPECIALACK) {
                                          ack = (pcl.pcl_status >> 15) & 0xf;
                                          PRINTD(KERN_INFO, lynx->id, "special ack %d", ack);
                                          ack = (ack == 1 ? ACKX_TIMEOUT : ACKX_SEND_ERROR);
                                  } else {
                                          ack = (pcl.pcl_status >> 15) & 0xf;
                                  }
                          } else {
                                  PRINT(KERN_INFO, lynx->id, "iso send packet was not completed");
                                  ack = ACKX_SEND_ERROR;
                          }
  
                          hpsb_packet_sent(host, packet, ack); //FIXME: maybe we should just use ACK_COMPLETE and ACKX_SEND_ERROR
                  }
          }
  
          if (intmask & PCI_INT_DMA_HLT(CHANNEL_ASYNC_RCV)) {
                  /* general receive DMA completed */
                  int stat = reg_read(lynx, DMA_CHAN_STAT(CHANNEL_ASYNC_RCV));
  
                  PRINTD(KERN_DEBUG, lynx->id, "received packet size %d",
                         stat & 0x1fff);
  
                  if (stat & DMA_CHAN_STAT_SELFID) {
                          lynx->selfid_size = stat & 0x1fff;
                          handle_selfid(lynx, host);
                  } else {
                          quadlet_t *q_data = lynx->rcv_page;
                          if ((*q_data >> 4 & 0xf) == TCODE_READQ_RESPONSE
                              || (*q_data >> 4 & 0xf) == TCODE_WRITEQ) {
                                  cpu_to_be32s(q_data + 3);
                          }
                          hpsb_packet_received(host, q_data, stat & 0x1fff, 0);
                  }
  
                  run_pcl(lynx, lynx->rcv_pcl_start, CHANNEL_ASYNC_RCV);
          }
  
  	return IRQ_HANDLED;
  }
  
  
  static void iso_rcv_bh(struct ti_lynx *lynx)
  {
          unsigned int idx;
          quadlet_t *data;
          unsigned long flags;
  
          spin_lock_irqsave(&lynx->iso_rcv.lock, flags);
  
          while (lynx->iso_rcv.used) {
                  idx = lynx->iso_rcv.last;
                  spin_unlock_irqrestore(&lynx->iso_rcv.lock, flags);
  
                  data = lynx->iso_rcv.page[idx / ISORCV_PER_PAGE]
                          + (idx % ISORCV_PER_PAGE) * MAX_ISORCV_SIZE;
  
                  if ((*data >> 16) + 4 != (lynx->iso_rcv.stat[idx] & 0x1fff)) {
                          PRINT(KERN_ERR, lynx->id,
                                "iso length mismatch 0x%08x/0x%08x", *data,
                                lynx->iso_rcv.stat[idx]);
                  }
  
                  if (lynx->iso_rcv.stat[idx]
                      & (DMA_CHAN_STAT_PCIERR | DMA_CHAN_STAT_PKTERR)) {
                          PRINT(KERN_INFO, lynx->id,
                                "iso receive error on %d to 0x%p", idx, data);
                  } else {
                          hpsb_packet_received(lynx->host, data,
                                               lynx->iso_rcv.stat[idx] & 0x1fff,
                                               0);
                  }
  
                  spin_lock_irqsave(&lynx->iso_rcv.lock, flags);
                  lynx->iso_rcv.last = (idx + 1) % NUM_ISORCV_PCL;
                  lynx->iso_rcv.used--;
          }
  
          if (lynx->iso_rcv.chan_count) {
                  reg_write(lynx, DMA_WORD1_CMP_ENABLE(CHANNEL_ISO_RCV),
                            DMA_WORD1_CMP_ENABLE_MASTER);
          }
          spin_unlock_irqrestore(&lynx->iso_rcv.lock, flags);
  }
  
  
  static void remove_card(struct pci_dev *dev)
  {
          struct ti_lynx *lynx;
  	struct device *lynx_dev;
          int i;
  
          lynx = pci_get_drvdata(dev);
          if (!lynx) return;
          pci_set_drvdata(dev, NULL);
  
  	lynx_dev = get_device(&lynx->host->device);
  
          switch (lynx->state) {
          case is_host:
                  reg_write(lynx, PCI_INT_ENABLE, 0);
                  hpsb_remove_host(lynx->host);
          case have_intr:
                  reg_write(lynx, PCI_INT_ENABLE, 0);
                  free_irq(lynx->dev->irq, lynx);
  
  		/* Disable IRM Contender and LCtrl */
  		if (lynx->phyic.reg_1394a)
  			set_phy_reg(lynx, 4, ~0xc0 & get_phy_reg(lynx, 4));
  
  		/* Let all other nodes know to ignore us */
  		lynx_devctl(lynx->host, RESET_BUS, LONG_RESET_NO_FORCE_ROOT);
  
          case have_iomappings:
                  reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
                  /* Fix buggy cards with autoboot pin not tied low: */
                  reg_write(lynx, DMA0_CHAN_CTRL, 0);
                  iounmap(lynx->registers);
                  iounmap(lynx->local_rom);
                  iounmap(lynx->local_ram);
                  iounmap(lynx->aux_port);
          case have_1394_buffers:
                  for (i = 0; i < ISORCV_PAGES; i++) {
                          if (lynx->iso_rcv.page[i]) {
                                  pci_free_consistent(lynx->dev, PAGE_SIZE,
                                                      lynx->iso_rcv.page[i],
                                                      lynx->iso_rcv.page_dma[i]);
                          }
                  }
                  pci_free_consistent(lynx->dev, PAGE_SIZE, lynx->rcv_page,
                                      lynx->rcv_page_dma);
          case have_aux_buf:

          case have_pcl_mem:

                  pci_free_consistent(lynx->dev, LOCALRAM_SIZE, lynx->pcl_mem,
                                      lynx->pcl_mem_dma);

          case clear:
                  /* do nothing - already freed */
                  ;
          }
  
  	tasklet_kill(&lynx->iso_rcv.tq);
  
  	if (lynx_dev)
  		put_device(lynx_dev);
  }
  
  
  static int __devinit add_card(struct pci_dev *dev,
                                const struct pci_device_id *devid_is_unused)
  {
  #define FAIL(fmt, args...) do { \
          PRINT_G(KERN_ERR, fmt , ## args); \
          remove_card(dev); \
          return error; \
          } while (0)
  
  	char irq_buf[16];
  	struct hpsb_host *host;
          struct ti_lynx *lynx; /* shortcut to currently handled device */
          struct ti_pcl pcl;
          u32 *pcli;
          int i;
          int error;
  
          error = -ENXIO;

          if (pci_set_dma_mask(dev, DMA_BIT_MASK(32)))

                  FAIL("DMA address limits not supported for PCILynx hardware");
          if (pci_enable_device(dev))
                  FAIL("failed to enable PCILynx hardware");
          pci_set_master(dev);
  
          error = -ENOMEM;
  
  	host = hpsb_alloc_host(&lynx_driver, sizeof(struct ti_lynx), &dev->dev);
          if (!host) FAIL("failed to allocate control structure memory");
  
          lynx = host->hostdata;
  	lynx->id = card_id++;
          lynx->dev = dev;
          lynx->state = clear;
  	lynx->host = host;
          host->pdev = dev;
          pci_set_drvdata(dev, lynx);
  
          spin_lock_init(&lynx->lock);
          spin_lock_init(&lynx->phy_reg_lock);

          lynx->pcl_mem = pci_alloc_consistent(dev, LOCALRAM_SIZE,
                                               &lynx->pcl_mem_dma);
  
          if (lynx->pcl_mem != NULL) {
                  lynx->state = have_pcl_mem;
                  PRINT(KERN_INFO, lynx->id,
                        "allocated PCL memory %d Bytes @ 0x%p", LOCALRAM_SIZE,
                        lynx->pcl_mem);
          } else {
                  FAIL("failed to allocate PCL memory area");
          }

  
          lynx->rcv_page = pci_alloc_consistent(dev, PAGE_SIZE,
                                                &lynx->rcv_page_dma);
          if (lynx->rcv_page == NULL) {
                  FAIL("failed to allocate receive buffer");
          }
          lynx->state = have_1394_buffers;
  
          for (i = 0; i < ISORCV_PAGES; i++) {
                  lynx->iso_rcv.page[i] =
                          pci_alloc_consistent(dev, PAGE_SIZE,
                                               &lynx->iso_rcv.page_dma[i]);
                  if (lynx->iso_rcv.page[i] == NULL) {
                          FAIL("failed to allocate iso receive buffers");
                  }
          }
  
          lynx->registers = ioremap_nocache(pci_resource_start(dev,0),
                                            PCILYNX_MAX_REGISTER);
          lynx->local_ram = ioremap(pci_resource_start(dev,1), PCILYNX_MAX_MEMORY);
          lynx->aux_port  = ioremap(pci_resource_start(dev,2), PCILYNX_MAX_MEMORY);
          lynx->local_rom = ioremap(pci_resource_start(dev,PCI_ROM_RESOURCE),
                                    PCILYNX_MAX_MEMORY);
          lynx->state = have_iomappings;
  
          if (lynx->registers == NULL) {
                  FAIL("failed to remap registers - card not accessible");
          }

          reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
          /* Fix buggy cards with autoboot pin not tied low: */
          reg_write(lynx, DMA0_CHAN_CTRL, 0);

  	sprintf (irq_buf, "%d", dev->irq);

          if (!request_irq(dev->irq, lynx_irq_handler, IRQF_SHARED,

                           PCILYNX_DRIVER_NAME, lynx)) {
                  PRINT(KERN_INFO, lynx->id, "allocated interrupt %s", irq_buf);
                  lynx->state = have_intr;
          } else {
                  FAIL("failed to allocate shared interrupt %s", irq_buf);
          }
  
          /* alloc_pcl return values are not checked, it is expected that the
           * provided PCL space is sufficient for the initial allocations */

          lynx->rcv_pcl = alloc_pcl(lynx);
          lynx->rcv_pcl_start = alloc_pcl(lynx);
          lynx->async.pcl = alloc_pcl(lynx);
          lynx->async.pcl_start = alloc_pcl(lynx);
          lynx->iso_send.pcl = alloc_pcl(lynx);
          lynx->iso_send.pcl_start = alloc_pcl(lynx);
  
          for (i = 0; i < NUM_ISORCV_PCL; i++) {
                  lynx->iso_rcv.pcl[i] = alloc_pcl(lynx);
          }
          lynx->iso_rcv.pcl_start = alloc_pcl(lynx);
  
          /* all allocations successful - simple init stuff follows */
  
          reg_write(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);

  	tasklet_init(&lynx->iso_rcv.tq, (void (*)(unsigned long))iso_rcv_bh,
  		     (unsigned long)lynx);
  
          spin_lock_init(&lynx->iso_rcv.lock);
  
          spin_lock_init(&lynx->async.queue_lock);
          lynx->async.channel = CHANNEL_ASYNC_SEND;
          spin_lock_init(&lynx->iso_send.queue_lock);
          lynx->iso_send.channel = CHANNEL_ISO_SEND;
  
          PRINT(KERN_INFO, lynx->id, "remapped memory spaces reg 0x%p, rom 0x%p, "
                "ram 0x%p, aux 0x%p", lynx->registers, lynx->local_rom,
                lynx->local_ram, lynx->aux_port);
  
          /* now, looking for PHY register set */
          if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) {
                  lynx->phyic.reg_1394a = 1;
                  PRINT(KERN_INFO, lynx->id,
                        "found 1394a conform PHY (using extended register set)");
                  lynx->phyic.vendor = get_phy_vendorid(lynx);
                  lynx->phyic.product = get_phy_productid(lynx);
          } else {
                  lynx->phyic.reg_1394a = 0;
                  PRINT(KERN_INFO, lynx->id, "found old 1394 PHY");
          }
  
          lynx->selfid_size = -1;
          lynx->phy_reg0 = -1;
  
  	INIT_LIST_HEAD(&lynx->async.queue);
  	INIT_LIST_HEAD(&lynx->async.pcl_queue);
  	INIT_LIST_HEAD(&lynx->iso_send.queue);
  	INIT_LIST_HEAD(&lynx->iso_send.pcl_queue);
  
          pcl.next = pcl_bus(lynx, lynx->rcv_pcl);
          put_pcl(lynx, lynx->rcv_pcl_start, &pcl);
  
          pcl.next = PCL_NEXT_INVALID;
          pcl.async_error_next = PCL_NEXT_INVALID;
  
          pcl.buffer[0].control = PCL_CMD_RCV | 16;
  #ifndef __BIG_ENDIAN
  	pcl.buffer[0].control |= PCL_BIGENDIAN;
  #endif
  	pcl.buffer[1].control = PCL_LAST_BUFF | 4080;
  
          pcl.buffer[0].pointer = lynx->rcv_page_dma;
          pcl.buffer[1].pointer = lynx->rcv_page_dma + 16;
          put_pcl(lynx, lynx->rcv_pcl, &pcl);
  
          pcl.next = pcl_bus(lynx, lynx->async.pcl);
          pcl.async_error_next = pcl_bus(lynx, lynx->async.pcl);
          put_pcl(lynx, lynx->async.pcl_start, &pcl);
  
          pcl.next = pcl_bus(lynx, lynx->iso_send.pcl);
          pcl.async_error_next = PCL_NEXT_INVALID;
          put_pcl(lynx, lynx->iso_send.pcl_start, &pcl);
  
          pcl.next = PCL_NEXT_INVALID;
          pcl.async_error_next = PCL_NEXT_INVALID;
          pcl.buffer[0].control = PCL_CMD_RCV | 4;
  #ifndef __BIG_ENDIAN
          pcl.buffer[0].control |= PCL_BIGENDIAN;
  #endif
          pcl.buffer[1].control = PCL_LAST_BUFF | 2044;
  
          for (i = 0; i < NUM_ISORCV_PCL; i++) {
                  int page = i / ISORCV_PER_PAGE;
                  int sec = i % ISORCV_PER_PAGE;
  
                  pcl.buffer[0].pointer = lynx->iso_rcv.page_dma[page]
                          + sec * MAX_ISORCV_SIZE;
                  pcl.buffer[1].pointer = pcl.buffer[0].pointer + 4;
                  put_pcl(lynx, lynx->iso_rcv.pcl[i], &pcl);
          }
  
          pcli = (u32 *)&pcl;
          for (i = 0; i < NUM_ISORCV_PCL; i++) {
                  pcli[i] = pcl_bus(lynx, lynx->iso_rcv.pcl[i]);
          }
          put_pcl(lynx, lynx->iso_rcv.pcl_start, &pcl);
  
          /* FIFO sizes from left to right: ITF=48 ATF=48 GRF=160 */
          reg_write(lynx, FIFO_SIZES, 0x003030a0);
          /* 20 byte threshold before triggering PCI transfer */
          reg_write(lynx, DMA_GLOBAL_REGISTER, 0x2<<24);
          /* threshold on both send FIFOs before transmitting:
             FIFO size - cache line size - 1 */
          i = reg_read(lynx, PCI_LATENCY_CACHELINE) & 0xff;
          i = 0x30 - i - 1;
          reg_write(lynx, FIFO_XMIT_THRESHOLD, (i << 8) | i);
  
          reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_1394);
  
          reg_write(lynx, LINK_INT_ENABLE, LINK_INT_PHY_TIMEOUT
                    | LINK_INT_PHY_REG_RCVD  | LINK_INT_PHY_BUSRESET
                    | LINK_INT_ISO_STUCK     | LINK_INT_ASYNC_STUCK
                    | LINK_INT_SENT_REJECT   | LINK_INT_TX_INVALID_TC
                    | LINK_INT_GRF_OVERFLOW  | LINK_INT_ITF_UNDERFLOW
                    | LINK_INT_ATF_UNDERFLOW);
  
          reg_write(lynx, DMA_WORD0_CMP_VALUE(CHANNEL_ASYNC_RCV), 0);
          reg_write(lynx, DMA_WORD0_CMP_ENABLE(CHANNEL_ASYNC_RCV), 0xa<<4);
          reg_write(lynx, DMA_WORD1_CMP_VALUE(CHANNEL_ASYNC_RCV), 0);
          reg_write(lynx, DMA_WORD1_CMP_ENABLE(CHANNEL_ASYNC_RCV),
                    DMA_WORD1_CMP_MATCH_LOCAL_NODE | DMA_WORD1_CMP_MATCH_BROADCAST
                    | DMA_WORD1_CMP_MATCH_EXACT    | DMA_WORD1_CMP_MATCH_BUS_BCAST
                    | DMA_WORD1_CMP_ENABLE_SELF_ID | DMA_WORD1_CMP_ENABLE_MASTER);
  
          run_pcl(lynx, lynx->rcv_pcl_start, CHANNEL_ASYNC_RCV);
  
          reg_write(lynx, DMA_WORD0_CMP_VALUE(CHANNEL_ISO_RCV), 0);
          reg_write(lynx, DMA_WORD0_CMP_ENABLE(CHANNEL_ISO_RCV), 0x9<<4);
          reg_write(lynx, DMA_WORD1_CMP_VALUE(CHANNEL_ISO_RCV), 0);
          reg_write(lynx, DMA_WORD1_CMP_ENABLE(CHANNEL_ISO_RCV), 0);
  
          run_sub_pcl(lynx, lynx->iso_rcv.pcl_start, 0, CHANNEL_ISO_RCV);
  
          reg_write(lynx, LINK_CONTROL, LINK_CONTROL_RCV_CMP_VALID
                    | LINK_CONTROL_TX_ISO_EN   | LINK_CONTROL_RX_ISO_EN
                    | LINK_CONTROL_TX_ASYNC_EN | LINK_CONTROL_RX_ASYNC_EN
                    | LINK_CONTROL_RESET_TX    | LINK_CONTROL_RESET_RX);
  
  	if (!lynx->phyic.reg_1394a) {
  		if (!hpsb_disable_irm) {
  			/* attempt to enable contender bit -FIXME- would this
  			 * work elsewhere? */
  			reg_set_bits(lynx, GPIO_CTRL_A, 0x1);
  			reg_write(lynx, GPIO_DATA_BASE + 0x3c, 0x1);
  		}
  	} else {
  		/* set the contender (if appropriate) and LCtrl bit in the
  		 * extended PHY register set. (Should check that PHY_02_EXTENDED
  		 * is set in register 2?)
  		 */
  		i = get_phy_reg(lynx, 4);
  		i |= PHY_04_LCTRL;
  		if (hpsb_disable_irm)

  			i &= ~PHY_04_CONTENDER;

  		else
  			i |= PHY_04_CONTENDER;
  		if (i != -1) set_phy_reg(lynx, 4, i);
  	}
  	
          if (!skip_eeprom)
          {
          	/* needed for i2c communication with serial eeprom */
          	struct i2c_adapter *i2c_ad;
          	struct i2c_algo_bit_data i2c_adapter_data;
  
          	error = -ENOMEM;

  		i2c_ad = kzalloc(sizeof(*i2c_ad), GFP_KERNEL);

          	if (!i2c_ad) FAIL("failed to allocate I2C adapter memory");

  		strlcpy(i2c_ad->name, "PCILynx I2C", sizeof(i2c_ad->name));

                  i2c_adapter_data = bit_data;
                  i2c_ad->algo_data = &i2c_adapter_data;
                  i2c_adapter_data.data = lynx;

  		i2c_ad->dev.parent = &dev->dev;

  
  		PRINTD(KERN_DEBUG, lynx->id,"original eeprom control: %d",
  		       reg_read(lynx, SERIAL_EEPROM_CONTROL));
  
          	/* reset hardware to sane state */
          	lynx->i2c_driven_state = 0x00000070;
          	reg_write(lynx, SERIAL_EEPROM_CONTROL, lynx->i2c_driven_state);
  
          	if (i2c_bit_add_bus(i2c_ad) < 0)
          	{
  			kfree(i2c_ad);
  			error = -ENXIO;
  			FAIL("unable to register i2c");
          	}
          	else
          	{
                          /* do i2c stuff */
                          unsigned char i2c_cmd = 0x10;
                          struct i2c_msg msg[2] = { { 0x50, 0, 1, &i2c_cmd },
                                                    { 0x50, I2C_M_RD, 20, (unsigned char*) lynx->bus_info_block }
                                                  };

  			/* we use i2c_transfer because we have no i2c_client
  			   at hand */

                          if (i2c_transfer(i2c_ad, msg, 2) < 0) {
                                  PRINT(KERN_ERR, lynx->id, "unable to read bus info block from i2c");
                          } else {

                                  PRINT(KERN_INFO, lynx->id, "got bus info block from serial eeprom");

  				/* FIXME: probably we should rewrite the max_rec, max_ROM(1394a),

  				 * generation(1394a) and link_spd(1394a) field and recalculate
  				 * the CRC */
  
                                  for (i = 0; i < 5 ; i++)
                                          PRINTD(KERN_DEBUG, lynx->id, "Businfo block quadlet %i: %08x",
  					       i, be32_to_cpu(lynx->bus_info_block[i]));
  
                                  /* info_length, crc_length and 1394 magic number to check, if it is really a bus info block */
  				if (((be32_to_cpu(lynx->bus_info_block[0]) & 0xffff0000) == 0x04040000) &&

  				    (lynx->bus_info_block[1] == IEEE1394_BUSID_MAGIC))

                                  {
                                          PRINT(KERN_DEBUG, lynx->id, "read a valid bus info block from");
                                  } else {
  					kfree(i2c_ad);
  					error = -ENXIO;
  					FAIL("read something from serial eeprom, but it does not seem to be a valid bus info block");
                                  }
  
                          }

  			i2c_del_adapter(i2c_ad);

  			kfree(i2c_ad);
                  }
          }
  
  	host->csr.guid_hi = be32_to_cpu(lynx->bus_info_block[3]);
  	host->csr.guid_lo = be32_to_cpu(lynx->bus_info_block[4]);
  	host->csr.cyc_clk_acc = (be32_to_cpu(lynx->bus_info_block[2]) >> 16) & 0xff;
  	host->csr.max_rec = (be32_to_cpu(lynx->bus_info_block[2]) >> 12) & 0xf;
  	if (!lynx->phyic.reg_1394a)
  		host->csr.lnk_spd = (get_phy_reg(lynx, 2) & 0xc0) >> 6;
  	else
  		host->csr.lnk_spd = be32_to_cpu(lynx->bus_info_block[2]) & 0x7;
  
  	if (hpsb_add_host(host)) {
  		error = -ENOMEM;
  		FAIL("Failed to register host with highlevel");
  	}
  
  	lynx->state = is_host;
  
  	return 0;
  #undef FAIL
  }
  
  
  static struct pci_device_id pci_table[] = {
  	{
                  .vendor =    PCI_VENDOR_ID_TI,
                  .device =    PCI_DEVICE_ID_TI_PCILYNX,
                  .subvendor = PCI_ANY_ID,
                  .subdevice = PCI_ANY_ID,
  	},
  	{ }			/* Terminating entry */
  };
  
  static struct pci_driver lynx_pci_driver = {
          .name =     PCILYNX_DRIVER_NAME,
          .id_table = pci_table,
          .probe =    add_card,
          .remove =   remove_card,
  };
  
  static struct hpsb_host_driver lynx_driver = {
  	.owner =	   THIS_MODULE,
  	.name =		   PCILYNX_DRIVER_NAME,
  	.set_hw_config_rom = NULL,
          .transmit_packet = lynx_transmit,
          .devctl =          lynx_devctl,
  	.isoctl =          NULL,
  };
  
  MODULE_AUTHOR("Andreas E. Bombe <andreas.bombe@munich.netsurf.de>");
  MODULE_DESCRIPTION("driver for Texas Instruments PCI Lynx IEEE-1394 controller");
  MODULE_LICENSE("GPL");
  MODULE_SUPPORTED_DEVICE("pcilynx");
  MODULE_DEVICE_TABLE(pci, pci_table);
  
  static int __init pcilynx_init(void)
  {
          int ret;

          ret = pci_register_driver(&lynx_pci_driver);
          if (ret < 0) {
                  PRINT_G(KERN_ERR, "PCI module init failed");

                  return ret;

          }
  
          return 0;

  }
  
  static void __exit pcilynx_cleanup(void)
  {
          pci_unregister_driver(&lynx_pci_driver);

  }
  
  
  module_init(pcilynx_init);
  module_exit(pcilynx_cleanup);