/*
   * Aic94xx SAS/SATA driver sequencer interface.
   *
   * Copyright (C) 2005 Adaptec, Inc.  All rights reserved.
   * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
   *
   * Parts of this code adapted from David Chaw's adp94xx_seq.c.
   *
   * This file is licensed under GPLv2.
   *
   * This file is part of the aic94xx driver.
   *
   * The aic94xx driver 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; version 2 of the
   * License.
   *
   * The aic94xx driver 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 the aic94xx driver; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   *
   */
  
  #include <linux/delay.h>
  #include <linux/gfp.h>
  #include <linux/pci.h>
  #include <linux/module.h>
  #include <linux/firmware.h>
  #include "aic94xx_reg.h"
  #include "aic94xx_hwi.h"
  
  #include "aic94xx_seq.h"
  #include "aic94xx_dump.h"
  
  /* It takes no more than 0.05 us for an instruction
   * to complete. So waiting for 1 us should be more than
   * plenty.
   */
  #define PAUSE_DELAY 1
  #define PAUSE_TRIES 1000
  
  static const struct firmware *sequencer_fw;
  static u16 cseq_vecs[CSEQ_NUM_VECS], lseq_vecs[LSEQ_NUM_VECS], mode2_task,
  	cseq_idle_loop, lseq_idle_loop;
  static const u8 *cseq_code, *lseq_code;
  static u32 cseq_code_size, lseq_code_size;
  
  static u16 first_scb_site_no = 0xFFFF;
  static u16 last_scb_site_no;
  
  /* ---------- Pause/Unpause CSEQ/LSEQ ---------- */
  
  /**
   * asd_pause_cseq - pause the central sequencer
   * @asd_ha: pointer to host adapter structure
   *
   * Return 0 on success, negative on failure.
   */
  static int asd_pause_cseq(struct asd_ha_struct *asd_ha)
  {
  	int	count = PAUSE_TRIES;
  	u32	arp2ctl;
  
  	arp2ctl = asd_read_reg_dword(asd_ha, CARP2CTL);
  	if (arp2ctl & PAUSED)
  		return 0;
  
  	asd_write_reg_dword(asd_ha, CARP2CTL, arp2ctl | EPAUSE);
  	do {
  		arp2ctl = asd_read_reg_dword(asd_ha, CARP2CTL);
  		if (arp2ctl & PAUSED)
  			return 0;
  		udelay(PAUSE_DELAY);
  	} while (--count > 0);
  
  	ASD_DPRINTK("couldn't pause CSEQ
  ");
  	return -1;
  }
  
  /**
   * asd_unpause_cseq - unpause the central sequencer.
   * @asd_ha: pointer to host adapter structure.
   *
   * Return 0 on success, negative on error.
   */
  static int asd_unpause_cseq(struct asd_ha_struct *asd_ha)
  {
  	u32	arp2ctl;
  	int	count = PAUSE_TRIES;
  
  	arp2ctl = asd_read_reg_dword(asd_ha, CARP2CTL);
  	if (!(arp2ctl & PAUSED))
  		return 0;
  
  	asd_write_reg_dword(asd_ha, CARP2CTL, arp2ctl & ~EPAUSE);
  	do {
  		arp2ctl = asd_read_reg_dword(asd_ha, CARP2CTL);
  		if (!(arp2ctl & PAUSED))
  			return 0;
  		udelay(PAUSE_DELAY);
  	} while (--count > 0);
  
  	ASD_DPRINTK("couldn't unpause the CSEQ
  ");
  	return -1;
  }
  
  /**
   * asd_seq_pause_lseq - pause a link sequencer
   * @asd_ha: pointer to a host adapter structure
   * @lseq: link sequencer of interest
   *
   * Return 0 on success, negative on error.
   */
  static int asd_seq_pause_lseq(struct asd_ha_struct *asd_ha, int lseq)
  {
  	u32    arp2ctl;
  	int    count = PAUSE_TRIES;
  
  	arp2ctl = asd_read_reg_dword(asd_ha, LmARP2CTL(lseq));
  	if (arp2ctl & PAUSED)
  		return 0;
  
  	asd_write_reg_dword(asd_ha, LmARP2CTL(lseq), arp2ctl | EPAUSE);
  	do {
  		arp2ctl = asd_read_reg_dword(asd_ha, LmARP2CTL(lseq));
  		if (arp2ctl & PAUSED)
  			return 0;
  		udelay(PAUSE_DELAY);
  	} while (--count > 0);
  
  	ASD_DPRINTK("couldn't pause LSEQ %d
  ", lseq);
  	return -1;
  }
  
  /**
   * asd_pause_lseq - pause the link sequencer(s)
   * @asd_ha: pointer to host adapter structure
   * @lseq_mask: mask of link sequencers of interest
   *
   * Return 0 on success, negative on failure.
   */
  static int asd_pause_lseq(struct asd_ha_struct *asd_ha, u8 lseq_mask)
  {
  	int lseq;
  	int err = 0;
  
  	for_each_sequencer(lseq_mask, lseq_mask, lseq) {
  		err = asd_seq_pause_lseq(asd_ha, lseq);
  		if (err)
  			return err;
  	}
  
  	return err;
  }
  
  /**
   * asd_seq_unpause_lseq - unpause a link sequencer
   * @asd_ha: pointer to host adapter structure
   * @lseq: link sequencer of interest
   *
   * Return 0 on success, negative on error.
   */
  static int asd_seq_unpause_lseq(struct asd_ha_struct *asd_ha, int lseq)
  {
  	u32 arp2ctl;
  	int count = PAUSE_TRIES;
  
  	arp2ctl = asd_read_reg_dword(asd_ha, LmARP2CTL(lseq));
  	if (!(arp2ctl & PAUSED))
  		return 0;
  
  	asd_write_reg_dword(asd_ha, LmARP2CTL(lseq), arp2ctl & ~EPAUSE);
  	do {
  		arp2ctl = asd_read_reg_dword(asd_ha, LmARP2CTL(lseq));
  		if (!(arp2ctl & PAUSED))
  			return 0;
  		udelay(PAUSE_DELAY);
  	} while (--count > 0);
  
  	ASD_DPRINTK("couldn't unpause LSEQ %d
  ", lseq);
  	return 0;
  }
  
  
  /* ---------- Downloading CSEQ/LSEQ microcode ---------- */
  
  static int asd_verify_cseq(struct asd_ha_struct *asd_ha, const u8 *_prog,
  			   u32 size)
  {
  	u32 addr = CSEQ_RAM_REG_BASE_ADR;
  	const u32 *prog = (u32 *) _prog;
  	u32 i;
  
  	for (i = 0; i < size; i += 4, prog++, addr += 4) {
  		u32 val = asd_read_reg_dword(asd_ha, addr);
  
  		if (le32_to_cpu(*prog) != val) {
  			asd_printk("%s: cseq verify failed at %u "
  				   "read:0x%x, wanted:0x%x
  ",
  				   pci_name(asd_ha->pcidev),
  				   i, val, le32_to_cpu(*prog));
  			return -1;
  		}
  	}
  	ASD_DPRINTK("verified %d bytes, passed
  ", size);
  	return 0;
  }
  
  /**
   * asd_verify_lseq - verify the microcode of a link sequencer
   * @asd_ha: pointer to host adapter structure
   * @_prog: pointer to the microcode
   * @size: size of the microcode in bytes
   * @lseq: link sequencer of interest
   *
   * The link sequencer code is accessed in 4 KB pages, which are selected
   * by setting LmRAMPAGE (bits 8 and 9) of the LmBISTCTL1 register.
   * The 10 KB LSEQm instruction code is mapped, page at a time, at
   * LmSEQRAM address.
   */
  static int asd_verify_lseq(struct asd_ha_struct *asd_ha, const u8 *_prog,
  			   u32 size, int lseq)
  {
  #define LSEQ_CODEPAGE_SIZE 4096
  	int pages =  (size + LSEQ_CODEPAGE_SIZE - 1) / LSEQ_CODEPAGE_SIZE;
  	u32 page;
  	const u32 *prog = (u32 *) _prog;
  
  	for (page = 0; page < pages; page++) {
  		u32 i;
  
  		asd_write_reg_dword(asd_ha, LmBISTCTL1(lseq),
  				    page << LmRAMPAGE_LSHIFT);
  		for (i = 0; size > 0 && i < LSEQ_CODEPAGE_SIZE;
  		     i += 4, prog++, size-=4) {
  
  			u32 val = asd_read_reg_dword(asd_ha, LmSEQRAM(lseq)+i);
  
  			if (le32_to_cpu(*prog) != val) {
  				asd_printk("%s: LSEQ%d verify failed "
  					   "page:%d, offs:%d
  ",
  					   pci_name(asd_ha->pcidev),
  					   lseq, page, i);
  				return -1;
  			}
  		}
  	}
  	ASD_DPRINTK("LSEQ%d verified %d bytes, passed
  ", lseq,
  		    (int)((u8 *)prog-_prog));
  	return 0;
  }
  
  /**
   * asd_verify_seq -- verify CSEQ/LSEQ microcode
   * @asd_ha: pointer to host adapter structure
   * @prog: pointer to microcode
   * @size: size of the microcode
   * @lseq_mask: if 0, verify CSEQ microcode, else mask of LSEQs of interest
   *
   * Return 0 if microcode is correct, negative on mismatch.
   */
  static int asd_verify_seq(struct asd_ha_struct *asd_ha, const u8 *prog,
  			      u32 size, u8 lseq_mask)
  {
  	if (lseq_mask == 0)
  		return asd_verify_cseq(asd_ha, prog, size);
  	else {
  		int lseq, err;
  
  		for_each_sequencer(lseq_mask, lseq_mask, lseq) {
  			err = asd_verify_lseq(asd_ha, prog, size, lseq);
  			if (err)
  				return err;
  		}
  	}
  
  	return 0;
  }
  #define ASD_DMA_MODE_DOWNLOAD
  #ifdef ASD_DMA_MODE_DOWNLOAD
  /* This is the size of the CSEQ Mapped instruction page */
  #define MAX_DMA_OVLY_COUNT ((1U << 14)-1)
  static int asd_download_seq(struct asd_ha_struct *asd_ha,
  			    const u8 * const prog, u32 size, u8 lseq_mask)
  {
  	u32 comstaten;
  	u32 reg;
  	int page;
  	const int pages = (size + MAX_DMA_OVLY_COUNT - 1) / MAX_DMA_OVLY_COUNT;
  	struct asd_dma_tok *token;
  	int err = 0;
  
  	if (size % 4) {
  		asd_printk("sequencer program not multiple of 4
  ");
  		return -1;
  	}
  
  	asd_pause_cseq(asd_ha);
  	asd_pause_lseq(asd_ha, 0xFF);
  
  	/* save, disable and clear interrupts */
  	comstaten = asd_read_reg_dword(asd_ha, COMSTATEN);
  	asd_write_reg_dword(asd_ha, COMSTATEN, 0);
  	asd_write_reg_dword(asd_ha, COMSTAT, COMSTAT_MASK);
  
  	asd_write_reg_dword(asd_ha, CHIMINTEN, RST_CHIMINTEN);
  	asd_write_reg_dword(asd_ha, CHIMINT, CHIMINT_MASK);
  
  	token = asd_alloc_coherent(asd_ha, MAX_DMA_OVLY_COUNT, GFP_KERNEL);
  	if (!token) {
  		asd_printk("out of memory for dma SEQ download
  ");
  		err = -ENOMEM;
  		goto out;
  	}
  	ASD_DPRINTK("dma-ing %d bytes
  ", size);
  
  	for (page = 0; page < pages; page++) {
  		int i;
  		u32 left = min(size-page*MAX_DMA_OVLY_COUNT,
  			       (u32)MAX_DMA_OVLY_COUNT);
  
  		memcpy(token->vaddr, prog + page*MAX_DMA_OVLY_COUNT, left);
  		asd_write_reg_addr(asd_ha, OVLYDMAADR, token->dma_handle);
  		asd_write_reg_dword(asd_ha, OVLYDMACNT, left);
  		reg = !page ? RESETOVLYDMA : 0;
  		reg |= (STARTOVLYDMA | OVLYHALTERR);
  		reg |= (lseq_mask ? (((u32)lseq_mask) << 8) : OVLYCSEQ);
  		/* Start DMA. */
  		asd_write_reg_dword(asd_ha, OVLYDMACTL, reg);
  
  		for (i = PAUSE_TRIES*100; i > 0; i--) {
  			u32 dmadone = asd_read_reg_dword(asd_ha, OVLYDMACTL);
  			if (!(dmadone & OVLYDMAACT))
  				break;
  			udelay(PAUSE_DELAY);
  		}
  	}
  
  	reg = asd_read_reg_dword(asd_ha, COMSTAT);
  	if (!(reg & OVLYDMADONE) || (reg & OVLYERR)
  	    || (asd_read_reg_dword(asd_ha, CHIMINT) & DEVEXCEPT_MASK)){
  		asd_printk("%s: error DMA-ing sequencer code
  ",
  			   pci_name(asd_ha->pcidev));
  		err = -ENODEV;
  	}
  
  	asd_free_coherent(asd_ha, token);
   out:
  	asd_write_reg_dword(asd_ha, COMSTATEN, comstaten);
  
  	return err ? : asd_verify_seq(asd_ha, prog, size, lseq_mask);
  }
  #else /* ASD_DMA_MODE_DOWNLOAD */
  static int asd_download_seq(struct asd_ha_struct *asd_ha, const u8 *_prog,
  			    u32 size, u8 lseq_mask)
  {
  	int i;
  	u32 reg = 0;
  	const u32 *prog = (u32 *) _prog;
  
  	if (size % 4) {
  		asd_printk("sequencer program not multiple of 4
  ");
  		return -1;
  	}
  
  	asd_pause_cseq(asd_ha);
  	asd_pause_lseq(asd_ha, 0xFF);
  
  	reg |= (lseq_mask ? (((u32)lseq_mask) << 8) : OVLYCSEQ);
  	reg |= PIOCMODE;
  
  	asd_write_reg_dword(asd_ha, OVLYDMACNT, size);
  	asd_write_reg_dword(asd_ha, OVLYDMACTL, reg);
  
  	ASD_DPRINTK("downloading %s sequencer%s in PIO mode...
  ",
  		    lseq_mask ? "LSEQ" : "CSEQ", lseq_mask ? "s" : "");
  
  	for (i = 0; i < size; i += 4, prog++)
  		asd_write_reg_dword(asd_ha, SPIODATA, *prog);
  
  	reg = (reg & ~PIOCMODE) | OVLYHALTERR;
  	asd_write_reg_dword(asd_ha, OVLYDMACTL, reg);
  
  	return asd_verify_seq(asd_ha, _prog, size, lseq_mask);
  }
  #endif /* ASD_DMA_MODE_DOWNLOAD */
  
  /**
   * asd_seq_download_seqs - download the sequencer microcode
   * @asd_ha: pointer to host adapter structure
   *
   * Download the central and link sequencer microcode.
   */
  static int asd_seq_download_seqs(struct asd_ha_struct *asd_ha)
  {
  	int 	err;
  
  	if (!asd_ha->hw_prof.enabled_phys) {
  		asd_printk("%s: no enabled phys!
  ", pci_name(asd_ha->pcidev));
  		return -ENODEV;
  	}
  
  	/* Download the CSEQ */
  	ASD_DPRINTK("downloading CSEQ...
  ");
  	err = asd_download_seq(asd_ha, cseq_code, cseq_code_size, 0);
  	if (err) {
  		asd_printk("CSEQ download failed:%d
  ", err);
  		return err;
  	}
  
  	/* Download the Link Sequencers code. All of the Link Sequencers
  	 * microcode can be downloaded at the same time.
  	 */
  	ASD_DPRINTK("downloading LSEQs...
  ");
  	err = asd_download_seq(asd_ha, lseq_code, lseq_code_size,
  			       asd_ha->hw_prof.enabled_phys);
  	if (err) {
  		/* Try it one at a time */
  		u8 lseq;
  		u8 lseq_mask = asd_ha->hw_prof.enabled_phys;
  
  		for_each_sequencer(lseq_mask, lseq_mask, lseq) {
  			err = asd_download_seq(asd_ha, lseq_code,
  					       lseq_code_size, 1<<lseq);
  			if (err)
  				break;
  		}
  	}
  	if (err)
  		asd_printk("LSEQs download failed:%d
  ", err);
  
  	return err;
  }
  
  /* ---------- Initializing the chip, chip memory, etc. ---------- */
  
  /**
   * asd_init_cseq_mip - initialize CSEQ mode independent pages 4-7
   * @asd_ha: pointer to host adapter structure
   */
  static void asd_init_cseq_mip(struct asd_ha_struct *asd_ha)
  {
  	/* CSEQ Mode Independent, page 4 setup. */
  	asd_write_reg_word(asd_ha, CSEQ_Q_EXE_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_EXE_TAIL, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_DONE_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_DONE_TAIL, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_SEND_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_SEND_TAIL, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_DMA2CHIM_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_DMA2CHIM_TAIL, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_COPY_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_COPY_TAIL, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_REG0, 0);
  	asd_write_reg_word(asd_ha, CSEQ_REG1, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_REG2, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_LINK_CTL_Q_MAP, 0);
  	{
  		u8 con = asd_read_reg_byte(asd_ha, CCONEXIST);
  		u8 val = hweight8(con);
  		asd_write_reg_byte(asd_ha, CSEQ_MAX_CSEQ_MODE, (val<<4)|val);
  	}
  	asd_write_reg_word(asd_ha, CSEQ_FREE_LIST_HACK_COUNT, 0);
  
  	/* CSEQ Mode independent, page 5 setup. */
  	asd_write_reg_dword(asd_ha, CSEQ_EST_NEXUS_REQ_QUEUE, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_EST_NEXUS_REQ_QUEUE+4, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_EST_NEXUS_REQ_COUNT, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_EST_NEXUS_REQ_COUNT+4, 0);
  	asd_write_reg_word(asd_ha, CSEQ_Q_EST_NEXUS_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_EST_NEXUS_TAIL, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_NEED_EST_NEXUS_SCB, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_EST_NEXUS_REQ_HEAD, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_EST_NEXUS_REQ_TAIL, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_EST_NEXUS_SCB_OFFSET, 0);
  
  	/* CSEQ Mode independent, page 6 setup. */
  	asd_write_reg_word(asd_ha, CSEQ_INT_ROUT_RET_ADDR0, 0);
  	asd_write_reg_word(asd_ha, CSEQ_INT_ROUT_RET_ADDR1, 0);
  	asd_write_reg_word(asd_ha, CSEQ_INT_ROUT_SCBPTR, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_INT_ROUT_MODE, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_ISR_SCRATCH_FLAGS, 0);
  	asd_write_reg_word(asd_ha, CSEQ_ISR_SAVE_SINDEX, 0);
  	asd_write_reg_word(asd_ha, CSEQ_ISR_SAVE_DINDEX, 0);
  	asd_write_reg_word(asd_ha, CSEQ_Q_MONIRTT_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_MONIRTT_TAIL, 0xFFFF);
  	/* Calculate the free scb mask. */
  	{
  		u16 cmdctx = asd_get_cmdctx_size(asd_ha);
  		cmdctx = (~((cmdctx/128)-1)) >> 8;
  		asd_write_reg_byte(asd_ha, CSEQ_FREE_SCB_MASK, (u8)cmdctx);
  	}
  	asd_write_reg_word(asd_ha, CSEQ_BUILTIN_FREE_SCB_HEAD,
  			   first_scb_site_no);
  	asd_write_reg_word(asd_ha, CSEQ_BUILTIN_FREE_SCB_TAIL,
  			   last_scb_site_no);
  	asd_write_reg_word(asd_ha, CSEQ_EXTENDED_FREE_SCB_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_EXTENDED_FREE_SCB_TAIL, 0xFFFF);
  
  	/* CSEQ Mode independent, page 7 setup. */
  	asd_write_reg_dword(asd_ha, CSEQ_EMPTY_REQ_QUEUE, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_EMPTY_REQ_QUEUE+4, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_EMPTY_REQ_COUNT, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_EMPTY_REQ_COUNT+4, 0);
  	asd_write_reg_word(asd_ha, CSEQ_Q_EMPTY_HEAD, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_Q_EMPTY_TAIL, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_NEED_EMPTY_SCB, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_EMPTY_REQ_HEAD, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_EMPTY_REQ_TAIL, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_EMPTY_SCB_OFFSET, 0);
  	asd_write_reg_word(asd_ha, CSEQ_PRIMITIVE_DATA, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_TIMEOUT_CONST, 0);
  }
  
  /**
   * asd_init_cseq_mdp - initialize CSEQ Mode dependent pages
   * @asd_ha: pointer to host adapter structure
   */
  static void asd_init_cseq_mdp(struct asd_ha_struct *asd_ha)
  {
  	int	i;
  	int	moffs;
  
  	moffs = CSEQ_PAGE_SIZE * 2;
  
  	/* CSEQ Mode dependent, modes 0-7, page 0 setup. */
  	for (i = 0; i < 8; i++) {
  		asd_write_reg_word(asd_ha, i*moffs+CSEQ_LRM_SAVE_SINDEX, 0);
  		asd_write_reg_word(asd_ha, i*moffs+CSEQ_LRM_SAVE_SCBPTR, 0);
  		asd_write_reg_word(asd_ha, i*moffs+CSEQ_Q_LINK_HEAD, 0xFFFF);
  		asd_write_reg_word(asd_ha, i*moffs+CSEQ_Q_LINK_TAIL, 0xFFFF);
  		asd_write_reg_byte(asd_ha, i*moffs+CSEQ_LRM_SAVE_SCRPAGE, 0);
  	}
  
  	/* CSEQ Mode dependent, mode 0-7, page 1 and 2 shall be ignored. */
  
  	/* CSEQ Mode dependent, mode 8, page 0 setup. */
  	asd_write_reg_word(asd_ha, CSEQ_RET_ADDR, 0xFFFF);
  	asd_write_reg_word(asd_ha, CSEQ_RET_SCBPTR, 0);
  	asd_write_reg_word(asd_ha, CSEQ_SAVE_SCBPTR, 0);
  	asd_write_reg_word(asd_ha, CSEQ_EMPTY_TRANS_CTX, 0);
  	asd_write_reg_word(asd_ha, CSEQ_RESP_LEN, 0);
  	asd_write_reg_word(asd_ha, CSEQ_TMF_SCBPTR, 0);
  	asd_write_reg_word(asd_ha, CSEQ_GLOBAL_PREV_SCB, 0);
  	asd_write_reg_word(asd_ha, CSEQ_GLOBAL_HEAD, 0);
  	asd_write_reg_word(asd_ha, CSEQ_CLEAR_LU_HEAD, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_TMF_OPCODE, 0);
  	asd_write_reg_byte(asd_ha, CSEQ_SCRATCH_FLAGS, 0);
  	asd_write_reg_word(asd_ha, CSEQ_HSB_SITE, 0);
  	asd_write_reg_word(asd_ha, CSEQ_FIRST_INV_SCB_SITE,
  			   (u16)last_scb_site_no+1);
  	asd_write_reg_word(asd_ha, CSEQ_FIRST_INV_DDB_SITE,
  			   (u16)asd_ha->hw_prof.max_ddbs);
  
  	/* CSEQ Mode dependent, mode 8, page 1 setup. */
  	asd_write_reg_dword(asd_ha, CSEQ_LUN_TO_CLEAR, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_LUN_TO_CLEAR + 4, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_LUN_TO_CHECK, 0);
  	asd_write_reg_dword(asd_ha, CSEQ_LUN_TO_CHECK + 4, 0);
  
  	/* CSEQ Mode dependent, mode 8, page 2 setup. */
  	/* Tell the sequencer the bus address of the first SCB. */
  	asd_write_reg_addr(asd_ha, CSEQ_HQ_NEW_POINTER,
  			   asd_ha->seq.next_scb.dma_handle);
  	ASD_DPRINTK("First SCB dma_handle: 0x%llx
  ",
  		    (unsigned long long)asd_ha->seq.next_scb.dma_handle);
  
  	/* Tell the sequencer the first Done List entry address. */
  	asd_write_reg_addr(asd_ha, CSEQ_HQ_DONE_BASE,
  			   asd_ha->seq.actual_dl->dma_handle);
  
  	/* Initialize the Q_DONE_POINTER with the least significant
  	 * 4 bytes of the first Done List address. */
  	asd_write_reg_dword(asd_ha, CSEQ_HQ_DONE_POINTER,
  			    ASD_BUSADDR_LO(asd_ha->seq.actual_dl->dma_handle));
  
  	asd_write_reg_byte(asd_ha, CSEQ_HQ_DONE_PASS, ASD_DEF_DL_TOGGLE);
  
  	/* CSEQ Mode dependent, mode 8, page 3 shall be ignored. */
  }
  
  /**
   * asd_init_cseq_scratch -- setup and init CSEQ
   * @asd_ha: pointer to host adapter structure
   *
   * Setup and initialize Central sequencers. Initialize the mode
   * independent and dependent scratch page to the default settings.
   */
  static void asd_init_cseq_scratch(struct asd_ha_struct *asd_ha)
  {
  	asd_init_cseq_mip(asd_ha);
  	asd_init_cseq_mdp(asd_ha);
  }
  
  /**
   * asd_init_lseq_mip -- initialize LSEQ Mode independent pages 0-3
   * @asd_ha: pointer to host adapter structure
   */
  static void asd_init_lseq_mip(struct asd_ha_struct *asd_ha, u8 lseq)
  {
  	int i;
  
  	/* LSEQ Mode independent page 0 setup. */
  	asd_write_reg_word(asd_ha, LmSEQ_Q_TGTXFR_HEAD(lseq), 0xFFFF);
  	asd_write_reg_word(asd_ha, LmSEQ_Q_TGTXFR_TAIL(lseq), 0xFFFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_LINK_NUMBER(lseq), lseq);
  	asd_write_reg_byte(asd_ha, LmSEQ_SCRATCH_FLAGS(lseq),
  			   ASD_NOTIFY_ENABLE_SPINUP);
  	asd_write_reg_dword(asd_ha, LmSEQ_CONNECTION_STATE(lseq),0x08000000);
  	asd_write_reg_word(asd_ha, LmSEQ_CONCTL(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_CONSTAT(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_CONNECTION_MODES(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_REG1_ISR(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_REG2_ISR(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_REG3_ISR(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_REG0_ISR(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_REG0_ISR(lseq)+4, 0);
  
  	/* LSEQ Mode independent page 1 setup. */
  	asd_write_reg_word(asd_ha, LmSEQ_EST_NEXUS_SCBPTR0(lseq), 0xFFFF);
  	asd_write_reg_word(asd_ha, LmSEQ_EST_NEXUS_SCBPTR1(lseq), 0xFFFF);
  	asd_write_reg_word(asd_ha, LmSEQ_EST_NEXUS_SCBPTR2(lseq), 0xFFFF);
  	asd_write_reg_word(asd_ha, LmSEQ_EST_NEXUS_SCBPTR3(lseq), 0xFFFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_EST_NEXUS_SCB_OPCODE0(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EST_NEXUS_SCB_OPCODE1(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EST_NEXUS_SCB_OPCODE2(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EST_NEXUS_SCB_OPCODE3(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EST_NEXUS_SCB_HEAD(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EST_NEXUS_SCB_TAIL(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EST_NEXUS_BUF_AVAIL(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_TIMEOUT_CONST(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_ISR_SAVE_SINDEX(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_ISR_SAVE_DINDEX(lseq), 0);
  
  	/* LSEQ Mode Independent page 2 setup. */
  	asd_write_reg_word(asd_ha, LmSEQ_EMPTY_SCB_PTR0(lseq), 0xFFFF);
  	asd_write_reg_word(asd_ha, LmSEQ_EMPTY_SCB_PTR1(lseq), 0xFFFF);
  	asd_write_reg_word(asd_ha, LmSEQ_EMPTY_SCB_PTR2(lseq), 0xFFFF);
  	asd_write_reg_word(asd_ha, LmSEQ_EMPTY_SCB_PTR3(lseq), 0xFFFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_EMPTY_SCB_OPCD0(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EMPTY_SCB_OPCD1(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EMPTY_SCB_OPCD2(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EMPTY_SCB_OPCD3(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EMPTY_SCB_HEAD(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EMPTY_SCB_TAIL(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_EMPTY_BUFS_AVAIL(lseq), 0);
  	for (i = 0; i < 12; i += 4)
  		asd_write_reg_dword(asd_ha, LmSEQ_ATA_SCR_REGS(lseq) + i, 0);
  
  	/* LSEQ Mode Independent page 3 setup. */
  
  	/* Device present timer timeout */
  	asd_write_reg_dword(asd_ha, LmSEQ_DEV_PRES_TMR_TOUT_CONST(lseq),
  			    ASD_DEV_PRESENT_TIMEOUT);
  
  	/* SATA interlock timer disabled */
  	asd_write_reg_dword(asd_ha, LmSEQ_SATA_INTERLOCK_TIMEOUT(lseq),
  			    ASD_SATA_INTERLOCK_TIMEOUT);
  
  	/* STP shutdown timer timeout constant, IGNORED by the sequencer,
  	 * always 0. */
  	asd_write_reg_dword(asd_ha, LmSEQ_STP_SHUTDOWN_TIMEOUT(lseq),
  			    ASD_STP_SHUTDOWN_TIMEOUT);
  
  	asd_write_reg_dword(asd_ha, LmSEQ_SRST_ASSERT_TIMEOUT(lseq),
  			    ASD_SRST_ASSERT_TIMEOUT);
  
  	asd_write_reg_dword(asd_ha, LmSEQ_RCV_FIS_TIMEOUT(lseq),
  			    ASD_RCV_FIS_TIMEOUT);
  
  	asd_write_reg_dword(asd_ha, LmSEQ_ONE_MILLISEC_TIMEOUT(lseq),
  			    ASD_ONE_MILLISEC_TIMEOUT);
  
  	/* COM_INIT timer */
  	asd_write_reg_dword(asd_ha, LmSEQ_TEN_MS_COMINIT_TIMEOUT(lseq),
  			    ASD_TEN_MILLISEC_TIMEOUT);
  
  	asd_write_reg_dword(asd_ha, LmSEQ_SMP_RCV_TIMEOUT(lseq),
  			    ASD_SMP_RCV_TIMEOUT);
  }
  
  /**
   * asd_init_lseq_mdp -- initialize LSEQ mode dependent pages.
   * @asd_ha: pointer to host adapter structure
   */
  static void asd_init_lseq_mdp(struct asd_ha_struct *asd_ha,  int lseq)
  {
  	int    i;
  	u32    moffs;
  	u16 ret_addr[] = {
  		0xFFFF,		  /* mode 0 */
  		0xFFFF,		  /* mode 1 */
  		mode2_task,	  /* mode 2 */
  		0,
  		0xFFFF,		  /* mode 4/5 */
  		0xFFFF,		  /* mode 4/5 */
  	};
  
  	/*
  	 * Mode 0,1,2 and 4/5 have common field on page 0 for the first
  	 * 14 bytes.
  	 */
  	for (i = 0; i < 3; i++) {
  		moffs = i * LSEQ_MODE_SCRATCH_SIZE;
  		asd_write_reg_word(asd_ha, LmSEQ_RET_ADDR(lseq)+moffs,
  				   ret_addr[i]);
  		asd_write_reg_word(asd_ha, LmSEQ_REG0_MODE(lseq)+moffs, 0);
  		asd_write_reg_word(asd_ha, LmSEQ_MODE_FLAGS(lseq)+moffs, 0);
  		asd_write_reg_word(asd_ha, LmSEQ_RET_ADDR2(lseq)+moffs,0xFFFF);
  		asd_write_reg_word(asd_ha, LmSEQ_RET_ADDR1(lseq)+moffs,0xFFFF);
  		asd_write_reg_byte(asd_ha, LmSEQ_OPCODE_TO_CSEQ(lseq)+moffs,0);
  		asd_write_reg_word(asd_ha, LmSEQ_DATA_TO_CSEQ(lseq)+moffs,0);
  	}
  	/*
  	 *  Mode 5 page 0 overlaps the same scratch page with Mode 0 page 3.
  	 */
  	asd_write_reg_word(asd_ha,
  			 LmSEQ_RET_ADDR(lseq)+LSEQ_MODE5_PAGE0_OFFSET,
  			   ret_addr[5]);
  	asd_write_reg_word(asd_ha,
  			 LmSEQ_REG0_MODE(lseq)+LSEQ_MODE5_PAGE0_OFFSET,0);
  	asd_write_reg_word(asd_ha,
  			 LmSEQ_MODE_FLAGS(lseq)+LSEQ_MODE5_PAGE0_OFFSET, 0);
  	asd_write_reg_word(asd_ha,
  			 LmSEQ_RET_ADDR2(lseq)+LSEQ_MODE5_PAGE0_OFFSET,0xFFFF);
  	asd_write_reg_word(asd_ha,
  			 LmSEQ_RET_ADDR1(lseq)+LSEQ_MODE5_PAGE0_OFFSET,0xFFFF);
  	asd_write_reg_byte(asd_ha,
  		         LmSEQ_OPCODE_TO_CSEQ(lseq)+LSEQ_MODE5_PAGE0_OFFSET,0);
  	asd_write_reg_word(asd_ha,
  		         LmSEQ_DATA_TO_CSEQ(lseq)+LSEQ_MODE5_PAGE0_OFFSET, 0);
  
  	/* LSEQ Mode dependent 0, page 0 setup. */
  	asd_write_reg_word(asd_ha, LmSEQ_FIRST_INV_DDB_SITE(lseq),
  			   (u16)asd_ha->hw_prof.max_ddbs);
  	asd_write_reg_word(asd_ha, LmSEQ_EMPTY_TRANS_CTX(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_RESP_LEN(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_FIRST_INV_SCB_SITE(lseq),
  			   (u16)last_scb_site_no+1);
  	asd_write_reg_word(asd_ha, LmSEQ_INTEN_SAVE(lseq),
  			    (u16) ((LmM0INTEN_MASK & 0xFFFF0000) >> 16));
  	asd_write_reg_word(asd_ha, LmSEQ_INTEN_SAVE(lseq) + 2,
  			    (u16) LmM0INTEN_MASK & 0xFFFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_LINK_RST_FRM_LEN(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_LINK_RST_PROTOCOL(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_RESP_STATUS(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_LAST_LOADED_SGE(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_SAVE_SCBPTR(lseq), 0);
  
  	/* LSEQ mode dependent, mode 1, page 0 setup. */
  	asd_write_reg_word(asd_ha, LmSEQ_Q_XMIT_HEAD(lseq), 0xFFFF);
  	asd_write_reg_word(asd_ha, LmSEQ_M1_EMPTY_TRANS_CTX(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_INI_CONN_TAG(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_FAILED_OPEN_STATUS(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_XMIT_REQUEST_TYPE(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_M1_RESP_STATUS(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_M1_LAST_LOADED_SGE(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_M1_SAVE_SCBPTR(lseq), 0);
  
  	/* LSEQ Mode dependent mode 2, page 0 setup */
  	asd_write_reg_word(asd_ha, LmSEQ_PORT_COUNTER(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_PM_TABLE_PTR(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_SATA_INTERLOCK_TMR_SAVE(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_IP_BITL(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_COPY_SMP_CONN_TAG(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_P0M2_OFFS1AH(lseq), 0);
  
  	/* LSEQ Mode dependent, mode 4/5, page 0 setup. */
  	asd_write_reg_byte(asd_ha, LmSEQ_SAVED_OOB_STATUS(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_SAVED_OOB_MODE(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_Q_LINK_HEAD(lseq), 0xFFFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_LINK_RST_ERR(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_SAVED_OOB_SIGNALS(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_SAS_RESET_MODE(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_LINK_RESET_RETRY_COUNT(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_NUM_LINK_RESET_RETRIES(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_OOB_INT_ENABLES(lseq), 0);
  	/*
  	 * Set the desired interval between transmissions of the NOTIFY
  	 * (ENABLE SPINUP) primitive.  Must be initialized to val - 1.
  	 */
  	asd_write_reg_word(asd_ha, LmSEQ_NOTIFY_TIMER_TIMEOUT(lseq),
  			   ASD_NOTIFY_TIMEOUT - 1);
  	/* No delay for the first NOTIFY to be sent to the attached target. */
  	asd_write_reg_word(asd_ha, LmSEQ_NOTIFY_TIMER_DOWN_COUNT(lseq),
  			   ASD_NOTIFY_DOWN_COUNT);
  	asd_write_reg_word(asd_ha, LmSEQ_NOTIFY_TIMER_INITIAL_COUNT(lseq),
  			   ASD_NOTIFY_DOWN_COUNT);
  
  	/* LSEQ Mode dependent, mode 0 and 1, page 1 setup. */
  	for (i = 0; i < 2; i++)	{
  		int j;
  		/* Start from Page 1 of Mode 0 and 1. */
  		moffs = LSEQ_PAGE_SIZE + i*LSEQ_MODE_SCRATCH_SIZE;
  		/* All the fields of page 1 can be initialized to 0. */
  		for (j = 0; j < LSEQ_PAGE_SIZE; j += 4)
  			asd_write_reg_dword(asd_ha, LmSCRATCH(lseq)+moffs+j,0);
  	}
  
  	/* LSEQ Mode dependent, mode 2, page 1 setup. */
  	asd_write_reg_dword(asd_ha, LmSEQ_INVALID_DWORD_COUNT(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_DISPARITY_ERROR_COUNT(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_LOSS_OF_SYNC_COUNT(lseq), 0);
  
  	/* LSEQ Mode dependent, mode 4/5, page 1. */
  	for (i = 0; i < LSEQ_PAGE_SIZE; i+=4)
  		asd_write_reg_dword(asd_ha, LmSEQ_FRAME_TYPE_MASK(lseq)+i, 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_FRAME_TYPE_MASK(lseq), 0xFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_HASHED_DEST_ADDR_MASK(lseq), 0xFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_HASHED_DEST_ADDR_MASK(lseq)+1,0xFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_HASHED_DEST_ADDR_MASK(lseq)+2,0xFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_HASHED_SRC_ADDR_MASK(lseq), 0xFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_HASHED_SRC_ADDR_MASK(lseq)+1, 0xFF);
  	asd_write_reg_byte(asd_ha, LmSEQ_HASHED_SRC_ADDR_MASK(lseq)+2, 0xFF);
  	asd_write_reg_dword(asd_ha, LmSEQ_DATA_OFFSET(lseq), 0xFFFFFFFF);
  
  	/* LSEQ Mode dependent, mode 0, page 2 setup. */
  	asd_write_reg_dword(asd_ha, LmSEQ_SMP_RCV_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_DEVICE_BITS(lseq), 0);
  	asd_write_reg_word(asd_ha, LmSEQ_SDB_DDB(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_SDB_NUM_TAGS(lseq), 0);
  	asd_write_reg_byte(asd_ha, LmSEQ_SDB_CURR_TAG(lseq), 0);
  
  	/* LSEQ Mode Dependent 1, page 2 setup. */
  	asd_write_reg_dword(asd_ha, LmSEQ_TX_ID_ADDR_FRAME(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_TX_ID_ADDR_FRAME(lseq)+4, 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_OPEN_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_SRST_AS_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_LAST_LOADED_SG_EL(lseq), 0);
  
  	/* LSEQ Mode Dependent 2, page 2 setup. */
  	/* The LmSEQ_STP_SHUTDOWN_TIMER_TERM_TS is IGNORED by the sequencer,
  	 * i.e. always 0. */
  	asd_write_reg_dword(asd_ha, LmSEQ_STP_SHUTDOWN_TIMER_TERM_TS(lseq),0);
  	asd_write_reg_dword(asd_ha, LmSEQ_CLOSE_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_BREAK_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_DWS_RESET_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_dword(asd_ha,LmSEQ_SATA_INTERLOCK_TIMER_TERM_TS(lseq),0);
  	asd_write_reg_dword(asd_ha, LmSEQ_MCTL_TIMER_TERM_TS(lseq), 0);
  
  	/* LSEQ Mode Dependent 4/5, page 2 setup. */
  	asd_write_reg_dword(asd_ha, LmSEQ_COMINIT_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_RCV_ID_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_RCV_FIS_TIMER_TERM_TS(lseq), 0);
  	asd_write_reg_dword(asd_ha, LmSEQ_DEV_PRES_TIMER_TERM_TS(lseq),	0);
  }
  
  /**
   * asd_init_lseq_scratch -- setup and init link sequencers
   * @asd_ha: pointer to host adapter struct
   */
  static void asd_init_lseq_scratch(struct asd_ha_struct *asd_ha)
  {
  	u8 lseq;
  	u8 lseq_mask;
  
  	lseq_mask = asd_ha->hw_prof.enabled_phys;
  	for_each_sequencer(lseq_mask, lseq_mask, lseq) {
  		asd_init_lseq_mip(asd_ha, lseq);
  		asd_init_lseq_mdp(asd_ha, lseq);
  	}
  }
  
  /**
   * asd_init_scb_sites -- initialize sequencer SCB sites (memory).
   * @asd_ha: pointer to host adapter structure
   *
   * This should be done before initializing common CSEQ and LSEQ
   * scratch since those areas depend on some computed values here,
   * last_scb_site_no, etc.
   */
  static void asd_init_scb_sites(struct asd_ha_struct *asd_ha)
  {
  	u16	site_no;
  	u16     max_scbs = 0;
  
  	for (site_no = asd_ha->hw_prof.max_scbs-1;
  	     site_no != (u16) -1;
  	     site_no--) {
  		u16	i;
  
  		/* Initialize all fields in the SCB site to 0. */
  		for (i = 0; i < ASD_SCB_SIZE; i += 4)
  			asd_scbsite_write_dword(asd_ha, site_no, i, 0);
  
  		/* Initialize SCB Site Opcode field to invalid. */
  		asd_scbsite_write_byte(asd_ha, site_no,
  				       offsetof(struct scb_header, opcode),
  				       0xFF);
  
  		/* Initialize SCB Site Flags field to mean a response
  		 * frame has been received.  This means inadvertent
  		 * frames received to be dropped. */
  		asd_scbsite_write_byte(asd_ha, site_no, 0x49, 0x01);
  
  		/* Workaround needed by SEQ to fix a SATA issue is to exclude
  		 * certain SCB sites from the free list. */
  		if (!SCB_SITE_VALID(site_no))
  			continue;
  
  		if (last_scb_site_no == 0)
  			last_scb_site_no = site_no;
  
  		/* For every SCB site, we need to initialize the
  		 * following fields: Q_NEXT, SCB_OPCODE, SCB_FLAGS,
  		 * and SG Element Flag. */
  
  		/* Q_NEXT field of the last SCB is invalidated. */
  		asd_scbsite_write_word(asd_ha, site_no, 0, first_scb_site_no);
  
  		first_scb_site_no = site_no;
  		max_scbs++;
  	}
  	asd_ha->hw_prof.max_scbs = max_scbs;
  	ASD_DPRINTK("max_scbs:%d
  ", asd_ha->hw_prof.max_scbs);
  	ASD_DPRINTK("first_scb_site_no:0x%x
  ", first_scb_site_no);
  	ASD_DPRINTK("last_scb_site_no:0x%x
  ", last_scb_site_no);
  }
  
  /**
   * asd_init_cseq_cio - initialize CSEQ CIO registers
   * @asd_ha: pointer to host adapter structure
   */
  static void asd_init_cseq_cio(struct asd_ha_struct *asd_ha)
  {
  	int i;
  
  	asd_write_reg_byte(asd_ha, CSEQCOMINTEN, 0);
  	asd_write_reg_byte(asd_ha, CSEQDLCTL, ASD_DL_SIZE_BITS);
  	asd_write_reg_byte(asd_ha, CSEQDLOFFS, 0);
  	asd_write_reg_byte(asd_ha, CSEQDLOFFS+1, 0);
  	asd_ha->seq.scbpro = 0;
  	asd_write_reg_dword(asd_ha, SCBPRO, 0);
  	asd_write_reg_dword(asd_ha, CSEQCON, 0);
  
  	/* Initialize CSEQ Mode 11 Interrupt Vectors.
  	 * The addresses are 16 bit wide and in dword units.
  	 * The values of their macros are in byte units.
  	 * Thus we have to divide by 4. */
  	asd_write_reg_word(asd_ha, CM11INTVEC0, cseq_vecs[0]);
  	asd_write_reg_word(asd_ha, CM11INTVEC1, cseq_vecs[1]);
  	asd_write_reg_word(asd_ha, CM11INTVEC2, cseq_vecs[2]);
  
  	/* Enable ARP2HALTC (ARP2 Halted from Halt Code Write). */
  	asd_write_reg_byte(asd_ha, CARP2INTEN, EN_ARP2HALTC);
  
  	/* Initialize CSEQ Scratch Page to 0x04. */
  	asd_write_reg_byte(asd_ha, CSCRATCHPAGE, 0x04);
  
  	/* Initialize CSEQ Mode[0-8] Dependent registers. */
  	/* Initialize Scratch Page to 0. */
  	for (i = 0; i < 9; i++)
  		asd_write_reg_byte(asd_ha, CMnSCRATCHPAGE(i), 0);
  
  	/* Reset the ARP2 Program Count. */
  	asd_write_reg_word(asd_ha, CPRGMCNT, cseq_idle_loop);
  
  	for (i = 0; i < 8; i++) {
  		/* Initialize Mode n Link m Interrupt Enable. */
  		asd_write_reg_dword(asd_ha, CMnINTEN(i), EN_CMnRSPMBXF);
  		/* Initialize Mode n Request Mailbox. */
  		asd_write_reg_dword(asd_ha, CMnREQMBX(i), 0);
  	}
  }
  
  /**
   * asd_init_lseq_cio -- initialize LmSEQ CIO registers
   * @asd_ha: pointer to host adapter structure
   */
  static void asd_init_lseq_cio(struct asd_ha_struct *asd_ha, int lseq)
  {
  	u8  *sas_addr;
  	int  i;
  
  	/* Enable ARP2HALTC (ARP2 Halted from Halt Code Write). */
  	asd_write_reg_dword(asd_ha, LmARP2INTEN(lseq), EN_ARP2HALTC);
  
  	asd_write_reg_byte(asd_ha, LmSCRATCHPAGE(lseq), 0);
  
  	/* Initialize Mode 0,1, and 2 SCRATCHPAGE to 0. */
  	for (i = 0; i < 3; i++)
  		asd_write_reg_byte(asd_ha, LmMnSCRATCHPAGE(lseq, i), 0);
  
  	/* Initialize Mode 5 SCRATCHPAGE to 0. */
  	asd_write_reg_byte(asd_ha, LmMnSCRATCHPAGE(lseq, 5), 0);
  
  	asd_write_reg_dword(asd_ha, LmRSPMBX(lseq), 0);
  	/* Initialize Mode 0,1,2 and 5 Interrupt Enable and
  	 * Interrupt registers. */
  	asd_write_reg_dword(asd_ha, LmMnINTEN(lseq, 0), LmM0INTEN_MASK);
  	asd_write_reg_dword(asd_ha, LmMnINT(lseq, 0), 0xFFFFFFFF);
  	/* Mode 1 */
  	asd_write_reg_dword(asd_ha, LmMnINTEN(lseq, 1), LmM1INTEN_MASK);
  	asd_write_reg_dword(asd_ha, LmMnINT(lseq, 1), 0xFFFFFFFF);
  	/* Mode 2 */
  	asd_write_reg_dword(asd_ha, LmMnINTEN(lseq, 2), LmM2INTEN_MASK);
  	asd_write_reg_dword(asd_ha, LmMnINT(lseq, 2), 0xFFFFFFFF);
  	/* Mode 5 */
  	asd_write_reg_dword(asd_ha, LmMnINTEN(lseq, 5), LmM5INTEN_MASK);
  	asd_write_reg_dword(asd_ha, LmMnINT(lseq, 5), 0xFFFFFFFF);
  
  	/* Enable HW Timer status. */
  	asd_write_reg_byte(asd_ha, LmHWTSTATEN(lseq), LmHWTSTATEN_MASK);
  
  	/* Enable Primitive Status 0 and 1. */
  	asd_write_reg_dword(asd_ha, LmPRIMSTAT0EN(lseq), LmPRIMSTAT0EN_MASK);
  	asd_write_reg_dword(asd_ha, LmPRIMSTAT1EN(lseq), LmPRIMSTAT1EN_MASK);
  
  	/* Enable Frame Error. */
  	asd_write_reg_dword(asd_ha, LmFRMERREN(lseq), LmFRMERREN_MASK);
  	asd_write_reg_byte(asd_ha, LmMnHOLDLVL(lseq, 0), 0x50);
  
  	/* Initialize Mode 0 Transfer Level to 512. */
  	asd_write_reg_byte(asd_ha,  LmMnXFRLVL(lseq, 0), LmMnXFRLVL_512);
  	/* Initialize Mode 1 Transfer Level to 256. */
  	asd_write_reg_byte(asd_ha, LmMnXFRLVL(lseq, 1), LmMnXFRLVL_256);
  
  	/* Initialize Program Count. */
  	asd_write_reg_word(asd_ha, LmPRGMCNT(lseq), lseq_idle_loop);
  
  	/* Enable Blind SG Move. */
  	asd_write_reg_dword(asd_ha, LmMODECTL(lseq), LmBLIND48);
  	asd_write_reg_word(asd_ha, LmM3SATATIMER(lseq),
  			   ASD_SATA_INTERLOCK_TIMEOUT);
  
  	(void) asd_read_reg_dword(asd_ha, LmREQMBX(lseq));
  
  	/* Clear Primitive Status 0 and 1. */
  	asd_write_reg_dword(asd_ha, LmPRMSTAT0(lseq), 0xFFFFFFFF);
  	asd_write_reg_dword(asd_ha, LmPRMSTAT1(lseq), 0xFFFFFFFF);
  
  	/* Clear HW Timer status. */
  	asd_write_reg_byte(asd_ha, LmHWTSTAT(lseq), 0xFF);
  
  	/* Clear DMA Errors for Mode 0 and 1. */
  	asd_write_reg_byte(asd_ha, LmMnDMAERRS(lseq, 0), 0xFF);
  	asd_write_reg_byte(asd_ha, LmMnDMAERRS(lseq, 1), 0xFF);
  
  	/* Clear SG DMA Errors for Mode 0 and 1. */
  	asd_write_reg_byte(asd_ha, LmMnSGDMAERRS(lseq, 0), 0xFF);
  	asd_write_reg_byte(asd_ha, LmMnSGDMAERRS(lseq, 1), 0xFF);
  
  	/* Clear Mode 0 Buffer Parity Error. */
  	asd_write_reg_byte(asd_ha, LmMnBUFSTAT(lseq, 0), LmMnBUFPERR);
  
  	/* Clear Mode 0 Frame Error register. */
  	asd_write_reg_dword(asd_ha, LmMnFRMERR(lseq, 0), 0xFFFFFFFF);
  
  	/* Reset LSEQ external interrupt arbiter. */
  	asd_write_reg_byte(asd_ha, LmARP2INTCTL(lseq), RSTINTCTL);
  
  	/* Set the Phy SAS for the LmSEQ WWN. */
  	sas_addr = asd_ha->phys[lseq].phy_desc->sas_addr;
  	for (i = 0; i < SAS_ADDR_SIZE; i++)
  		asd_write_reg_byte(asd_ha, LmWWN(lseq) + i, sas_addr[i]);
  
  	/* Set the Transmit Size to 1024 bytes, 0 = 256 Dwords. */
  	asd_write_reg_byte(asd_ha, LmMnXMTSIZE(lseq, 1), 0);
  
  	/* Set the Bus Inactivity Time Limit Timer. */
  	asd_write_reg_word(asd_ha, LmBITL_TIMER(lseq), 9);
  
  	/* Enable SATA Port Multiplier. */
  	asd_write_reg_byte(asd_ha, LmMnSATAFS(lseq, 1), 0x80);
  
  	/* Initialize Interrupt Vector[0-10] address in Mode 3.
  	 * See the comment on CSEQ_INT_* */
  	asd_write_reg_word(asd_ha, LmM3INTVEC0(lseq), lseq_vecs[0]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC1(lseq), lseq_vecs[1]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC2(lseq), lseq_vecs[2]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC3(lseq), lseq_vecs[3]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC4(lseq), lseq_vecs[4]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC5(lseq), lseq_vecs[5]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC6(lseq), lseq_vecs[6]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC7(lseq), lseq_vecs[7]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC8(lseq), lseq_vecs[8]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC9(lseq), lseq_vecs[9]);
  	asd_write_reg_word(asd_ha, LmM3INTVEC10(lseq), lseq_vecs[10]);
  	/*
  	 * Program the Link LED control, applicable only for
  	 * Chip Rev. B or later.
  	 */
  	asd_write_reg_dword(asd_ha, LmCONTROL(lseq),
  			    (LEDTIMER | LEDMODE_TXRX | LEDTIMERS_100ms));
  
  	/* Set the Align Rate for SAS and STP mode. */
  	asd_write_reg_byte(asd_ha, LmM1SASALIGN(lseq), SAS_ALIGN_DEFAULT);
  	asd_write_reg_byte(asd_ha, LmM1STPALIGN(lseq), STP_ALIGN_DEFAULT);
  }
  
  
  /**
   * asd_post_init_cseq -- clear CSEQ Mode n Int. status and Response mailbox
   * @asd_ha: pointer to host adapter struct
   */
  static void asd_post_init_cseq(struct asd_ha_struct *asd_ha)
  {
  	int i;
  
  	for (i = 0; i < 8; i++)
  		asd_write_reg_dword(asd_ha, CMnINT(i), 0xFFFFFFFF);
  	for (i = 0; i < 8; i++)
  		asd_read_reg_dword(asd_ha, CMnRSPMBX(i));
  	/* Reset the external interrupt arbiter. */
  	asd_write_reg_byte(asd_ha, CARP2INTCTL, RSTINTCTL);
  }
  
  /**
   * asd_init_ddb_0 -- initialize DDB 0
   * @asd_ha: pointer to host adapter structure
   *
   * Initialize DDB site 0 which is used internally by the sequencer.
   */
  static void asd_init_ddb_0(struct asd_ha_struct *asd_ha)
  {
  	int	i;
  
  	/* Zero out the DDB explicitly */
  	for (i = 0; i < sizeof(struct asd_ddb_seq_shared); i+=4)
  		asd_ddbsite_write_dword(asd_ha, 0, i, 0);
  
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, q_free_ddb_head), 0);
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, q_free_ddb_tail),
  			       asd_ha->hw_prof.max_ddbs-1);
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, q_free_ddb_cnt), 0);
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, q_used_ddb_head), 0xFFFF);
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, q_used_ddb_tail), 0xFFFF);
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, shared_mem_lock), 0);
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, smp_conn_tag), 0);
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, est_nexus_buf_cnt), 0);
  	asd_ddbsite_write_word(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, est_nexus_buf_thresh),
  			       asd_ha->hw_prof.num_phys * 2);
  	asd_ddbsite_write_byte(asd_ha, 0,
  		 offsetof(struct asd_ddb_seq_shared, settable_max_contexts),0);
  	asd_ddbsite_write_byte(asd_ha, 0,
  	       offsetof(struct asd_ddb_seq_shared, conn_not_active), 0xFF);
  	asd_ddbsite_write_byte(asd_ha, 0,
  	       offsetof(struct asd_ddb_seq_shared, phy_is_up), 0x00);
  	/* DDB 0 is reserved */
  	set_bit(0, asd_ha->hw_prof.ddb_bitmap);
  }
  
  static void asd_seq_init_ddb_sites(struct asd_ha_struct *asd_ha)
  {
  	unsigned int i;
  	unsigned int ddb_site;
  
  	for (ddb_site = 0 ; ddb_site < ASD_MAX_DDBS; ddb_site++)
  		for (i = 0; i < sizeof(struct asd_ddb_ssp_smp_target_port); i+= 4)
  			asd_ddbsite_write_dword(asd_ha, ddb_site, i, 0);
  }
  
  /**
   * asd_seq_setup_seqs -- setup and initialize central and link sequencers
   * @asd_ha: pointer to host adapter structure
   */
  static void asd_seq_setup_seqs(struct asd_ha_struct *asd_ha)
  {
  	int 		lseq;
  	u8		lseq_mask;
  
  	/* Initialize DDB sites */
  	asd_seq_init_ddb_sites(asd_ha);
  
  	/* Initialize SCB sites. Done first to compute some values which
  	 * the rest of the init code depends on. */
  	asd_init_scb_sites(asd_ha);
  
  	/* Initialize CSEQ Scratch RAM registers. */
  	asd_init_cseq_scratch(asd_ha);
  
  	/* Initialize LmSEQ Scratch RAM registers. */
  	asd_init_lseq_scratch(asd_ha);
  
  	/* Initialize CSEQ CIO registers. */
  	asd_init_cseq_cio(asd_ha);
  
  	asd_init_ddb_0(asd_ha);
  
  	/* Initialize LmSEQ CIO registers. */
  	lseq_mask = asd_ha->hw_prof.enabled_phys;
  	for_each_sequencer(lseq_mask, lseq_mask, lseq)
  		asd_init_lseq_cio(asd_ha, lseq);
  	asd_post_init_cseq(asd_ha);
  }
  
  
  /**
   * asd_seq_start_cseq -- start the central sequencer, CSEQ
   * @asd_ha: pointer to host adapter structure
   */
  static int asd_seq_start_cseq(struct asd_ha_struct *asd_ha)
  {
  	/* Reset the ARP2 instruction to location zero. */
  	asd_write_reg_word(asd_ha, CPRGMCNT, cseq_idle_loop);
  
  	/* Unpause the CSEQ  */
  	return asd_unpause_cseq(asd_ha);
  }
  
  /**
   * asd_seq_start_lseq -- start a link sequencer
   * @asd_ha: pointer to host adapter structure
   * @lseq: the link sequencer of interest
   */
  static int asd_seq_start_lseq(struct asd_ha_struct *asd_ha, int lseq)
  {
  	/* Reset the ARP2 instruction to location zero. */
  	asd_write_reg_word(asd_ha, LmPRGMCNT(lseq), lseq_idle_loop);
  
  	/* Unpause the LmSEQ  */
  	return asd_seq_unpause_lseq(asd_ha, lseq);
  }
  
  int asd_release_firmware(void)
  {
  	release_firmware(sequencer_fw);
  	return 0;
  }
  
  static int asd_request_firmware(struct asd_ha_struct *asd_ha)
  {
  	int err, i;
  	struct sequencer_file_header header;
  	const struct sequencer_file_header *hdr_ptr;
  	u32 csum = 0;
  	u16 *ptr_cseq_vecs, *ptr_lseq_vecs;
  
  	if (sequencer_fw)
  		/* already loaded */
  		return 0;
  
  	err = request_firmware(&sequencer_fw,
  			       SAS_RAZOR_SEQUENCER_FW_FILE,
  			       &asd_ha->pcidev->dev);
  	if (err)
  		return err;
  
  	hdr_ptr = (const struct sequencer_file_header *)sequencer_fw->data;
  
  	header.csum = le32_to_cpu(hdr_ptr->csum);
  	header.major = le32_to_cpu(hdr_ptr->major);
  	header.minor = le32_to_cpu(hdr_ptr->minor);
  	header.cseq_table_offset = le32_to_cpu(hdr_ptr->cseq_table_offset);
  	header.cseq_table_size = le32_to_cpu(hdr_ptr->cseq_table_size);
  	header.lseq_table_offset = le32_to_cpu(hdr_ptr->lseq_table_offset);
  	header.lseq_table_size = le32_to_cpu(hdr_ptr->lseq_table_size);
  	header.cseq_code_offset = le32_to_cpu(hdr_ptr->cseq_code_offset);
  	header.cseq_code_size = le32_to_cpu(hdr_ptr->cseq_code_size);
  	header.lseq_code_offset = le32_to_cpu(hdr_ptr->lseq_code_offset);
  	header.lseq_code_size = le32_to_cpu(hdr_ptr->lseq_code_size);
  	header.mode2_task = le16_to_cpu(hdr_ptr->mode2_task);
  	header.cseq_idle_loop = le16_to_cpu(hdr_ptr->cseq_idle_loop);
  	header.lseq_idle_loop = le16_to_cpu(hdr_ptr->lseq_idle_loop);
  
  	for (i = sizeof(header.csum); i < sequencer_fw->size; i++)
  		csum += sequencer_fw->data[i];
  
  	if (csum != header.csum) {
  		asd_printk("Firmware file checksum mismatch
  ");
  		return -EINVAL;
  	}
  
  	if (header.cseq_table_size != CSEQ_NUM_VECS ||
  	    header.lseq_table_size != LSEQ_NUM_VECS) {
  		asd_printk("Firmware file table size mismatch
  ");
  		return -EINVAL;
  	}
  
  	asd_printk("Found sequencer Firmware version %d.%d (%s)
  ",
  		   header.major, header.minor, hdr_ptr->version);
  
  	if (header.major != SAS_RAZOR_SEQUENCER_FW_MAJOR) {
  		asd_printk("Firmware Major Version Mismatch;"
  			   "driver requires version %d.X",
  			   SAS_RAZOR_SEQUENCER_FW_MAJOR);
  		return -EINVAL;
  	}
  
  	ptr_cseq_vecs = (u16 *)&sequencer_fw->data[header.cseq_table_offset];
  	ptr_lseq_vecs = (u16 *)&sequencer_fw->data[header.lseq_table_offset];
  	mode2_task = header.mode2_task;
  	cseq_idle_loop = header.cseq_idle_loop;
  	lseq_idle_loop = header.lseq_idle_loop;
  
  	for (i = 0; i < CSEQ_NUM_VECS; i++)
  		cseq_vecs[i] = le16_to_cpu(ptr_cseq_vecs[i]);
  
  	for (i = 0; i < LSEQ_NUM_VECS; i++)
  		lseq_vecs[i] = le16_to_cpu(ptr_lseq_vecs[i]);
  
  	cseq_code = &sequencer_fw->data[header.cseq_code_offset];
  	cseq_code_size = header.cseq_code_size;
  	lseq_code = &sequencer_fw->data[header.lseq_code_offset];
  	lseq_code_size = header.lseq_code_size;
  
  	return 0;
  }
  
  int asd_init_seqs(struct asd_ha_struct *asd_ha)
  {
  	int err;
  
  	err = asd_request_firmware(asd_ha);
  
  	if (err) {
  		asd_printk("Failed to load sequencer firmware file %s, error %d
  ",
  			   SAS_RAZOR_SEQUENCER_FW_FILE, err);
  		return err;
  	}
  
  	err = asd_seq_download_seqs(asd_ha);
  	if (err) {
  		asd_printk("couldn't download sequencers for %s
  ",
  			   pci_name(asd_ha->pcidev));
  		return err;
  	}
  
  	asd_seq_setup_seqs(asd_ha);
  
  	return 0;
  }
  
  int asd_start_seqs(struct asd_ha_struct *asd_ha)
  {
  	int err;
  	u8  lseq_mask;
  	int lseq;
  
  	err = asd_seq_start_cseq(asd_ha);
  	if (err) {
  		asd_printk("couldn't start CSEQ for %s
  ",
  			   pci_name(asd_ha->pcidev));
  		return err;
  	}
  
  	lseq_mask = asd_ha->hw_prof.enabled_phys;
  	for_each_sequencer(lseq_mask, lseq_mask, lseq) {
  		err = asd_seq_start_lseq(asd_ha, lseq);
  		if (err) {
  			asd_printk("coudln't start LSEQ %d for %s
  ", lseq,
  				   pci_name(asd_ha->pcidev));
  			return err;
  		}
  	}
  
  	return 0;
  }
  
  /**
   * asd_update_port_links -- update port_map_by_links and phy_is_up
   * @sas_phy: pointer to the phy which has been added to a port
   *
   * 1) When a link reset has completed and we got BYTES DMAED with a
   * valid frame we call this function for that phy, to indicate that
   * the phy is up, i.e. we update the phy_is_up in DDB 0.  The
   * sequencer checks phy_is_up when pending SCBs are to be sent, and
   * when an open address frame has been received.
   *
   * 2) When we know of ports, we call this function to update the map
   * of phys participaing in that port, i.e. we update the
   * port_map_by_links in DDB 0.  When a HARD_RESET primitive has been
   * received, the sequencer disables all phys in that port.
   * port_map_by_links is also used as the conn_mask byte in the
   * initiator/target port DDB.
   */
  void asd_update_port_links(struct asd_ha_struct *asd_ha, struct asd_phy *phy)
  {
  	const u8 phy_mask = (u8) phy->asd_port->phy_mask;
  	u8  phy_is_up;
  	u8  mask;
  	int i, err;
  	unsigned long flags;
  
  	spin_lock_irqsave(&asd_ha->hw_prof.ddb_lock, flags);
  	for_each_phy(phy_mask, mask, i)
  		asd_ddbsite_write_byte(asd_ha, 0,
  				       offsetof(struct asd_ddb_seq_shared,
  						port_map_by_links)+i,phy_mask);
  
  	for (i = 0; i < 12; i++) {
  		phy_is_up = asd_ddbsite_read_byte(asd_ha, 0,
  			  offsetof(struct asd_ddb_seq_shared, phy_is_up));
  		err = asd_ddbsite_update_byte(asd_ha, 0,
  				offsetof(struct asd_ddb_seq_shared, phy_is_up),
  				phy_is_up,
  				phy_is_up | phy_mask);
  		if (!err)
  			break;
  		else if (err == -EFAULT) {
  			asd_printk("phy_is_up: parity error in DDB 0
  ");
  			break;
  		}
  	}
  	spin_unlock_irqrestore(&asd_ha->hw_prof.ddb_lock, flags);
  
  	if (err)
  		asd_printk("couldn't update DDB 0:error:%d
  ", err);
  }
  
  MODULE_FIRMWARE(SAS_RAZOR_SEQUENCER_FW_FILE);