/*
   * Support for IDE interfaces on Celleb platform
   *
   * (C) Copyright 2006 TOSHIBA CORPORATION
   *
   * This code is based on drivers/ide/pci/siimage.c:
   * Copyright (C) 2001-2002	Andre Hedrick <andre@linux-ide.org>

   * Copyright (C) 2003		Red Hat

   *
   * 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.,
   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   */
  
  #include <linux/types.h>
  #include <linux/module.h>
  #include <linux/pci.h>
  #include <linux/delay.h>

  #include <linux/ide.h>
  #include <linux/init.h>
  
  #define PCI_DEVICE_ID_TOSHIBA_SCC_ATA            0x01b4
  
  #define SCC_PATA_NAME           "scc IDE"
  
  #define TDVHSEL_MASTER          0x00000001
  #define TDVHSEL_SLAVE           0x00000004
  
  #define MODE_JCUSFEN            0x00000080
  
  #define CCKCTRL_ATARESET        0x00040000
  #define CCKCTRL_BUFCNT          0x00020000
  #define CCKCTRL_CRST            0x00010000
  #define CCKCTRL_OCLKEN          0x00000100
  #define CCKCTRL_ATACLKOEN       0x00000002
  #define CCKCTRL_LCLKEN          0x00000001
  
  #define QCHCD_IOS_SS		0x00000001
  
  #define QCHSD_STPDIAG		0x00020000
  
  #define INTMASK_MSK             0xD1000012
  #define INTSTS_SERROR		0x80000000
  #define INTSTS_PRERR		0x40000000
  #define INTSTS_RERR		0x10000000
  #define INTSTS_ICERR		0x01000000
  #define INTSTS_BMSINT		0x00000010
  #define INTSTS_BMHE		0x00000008
  #define INTSTS_IOIRQS           0x00000004
  #define INTSTS_INTRQ            0x00000002
  #define INTSTS_ACTEINT          0x00000001
  
  #define ECMODE_VALUE 0x01
  
  static struct scc_ports {
  	unsigned long ctl, dma;

  	struct ide_host *host;	/* for removing port from system */

  } scc_ports[MAX_HWIFS];
  
  /* PIO transfer mode  table */
  /* JCHST */
  static unsigned long JCHSTtbl[2][7] = {
  	{0x0E, 0x05, 0x02, 0x03, 0x02, 0x00, 0x00},   /* 100MHz */
  	{0x13, 0x07, 0x04, 0x04, 0x03, 0x00, 0x00}    /* 133MHz */
  };
  
  /* JCHHT */
  static unsigned long JCHHTtbl[2][7] = {
  	{0x0E, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00},   /* 100MHz */
  	{0x13, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00}    /* 133MHz */
  };
  
  /* JCHCT */
  static unsigned long JCHCTtbl[2][7] = {
  	{0x1D, 0x1D, 0x1C, 0x0B, 0x06, 0x00, 0x00},   /* 100MHz */
  	{0x27, 0x26, 0x26, 0x0E, 0x09, 0x00, 0x00}    /* 133MHz */
  };
  
  
  /* DMA transfer mode  table */
  /* JCHDCTM/JCHDCTS */
  static unsigned long JCHDCTxtbl[2][7] = {
  	{0x0A, 0x06, 0x04, 0x03, 0x01, 0x00, 0x00},   /* 100MHz */
  	{0x0E, 0x09, 0x06, 0x04, 0x02, 0x01, 0x00}    /* 133MHz */
  };
  
  /* JCSTWTM/JCSTWTS  */
  static unsigned long JCSTWTxtbl[2][7] = {
  	{0x06, 0x04, 0x03, 0x02, 0x02, 0x02, 0x00},   /* 100MHz */
  	{0x09, 0x06, 0x04, 0x02, 0x02, 0x02, 0x02}    /* 133MHz */
  };
  
  /* JCTSS */
  static unsigned long JCTSStbl[2][7] = {
  	{0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x00},   /* 100MHz */
  	{0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05}    /* 133MHz */
  };
  
  /* JCENVT */
  static unsigned long JCENVTtbl[2][7] = {
  	{0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00},   /* 100MHz */
  	{0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02}    /* 133MHz */
  };
  
  /* JCACTSELS/JCACTSELM */
  static unsigned long JCACTSELtbl[2][7] = {
  	{0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00},   /* 100MHz */
  	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}    /* 133MHz */
  };
  
  
  static u8 scc_ide_inb(unsigned long port)
  {
  	u32 data = in_be32((void*)port);
  	return (u8)data;
  }

  static void scc_exec_command(ide_hwif_t *hwif, u8 cmd)
  {
  	out_be32((void *)hwif->io_ports.command_addr, cmd);
  	eieio();
  	in_be32((void *)(hwif->dma_base + 0x01c));
  	eieio();
  }

  static u8 scc_read_status(ide_hwif_t *hwif)
  {
  	return (u8)in_be32((void *)hwif->io_ports.status_addr);
  }

  static u8 scc_read_altstatus(ide_hwif_t *hwif)
  {
  	return (u8)in_be32((void *)hwif->io_ports.ctl_addr);
  }

  static u8 scc_dma_sff_read_status(ide_hwif_t *hwif)

  {

  	return (u8)in_be32((void *)(hwif->dma_base + 4));

  }

  static void scc_write_devctl(ide_hwif_t *hwif, u8 ctl)

  {

  	out_be32((void *)hwif->io_ports.ctl_addr, ctl);
  	eieio();
  	in_be32((void *)(hwif->dma_base + 0x01c));
  	eieio();
  }

  static void scc_ide_insw(unsigned long port, void *addr, u32 count)
  {
  	u16 *ptr = (u16 *)addr;
  	while (count--) {
  		*ptr++ = le16_to_cpu(in_be32((void*)port));
  	}
  }
  
  static void scc_ide_insl(unsigned long port, void *addr, u32 count)
  {
  	u16 *ptr = (u16 *)addr;
  	while (count--) {
  		*ptr++ = le16_to_cpu(in_be32((void*)port));
  		*ptr++ = le16_to_cpu(in_be32((void*)port));
  	}
  }
  
  static void scc_ide_outb(u8 addr, unsigned long port)
  {
  	out_be32((void*)port, addr);
  }

  static void
  scc_ide_outsw(unsigned long port, void *addr, u32 count)
  {
  	u16 *ptr = (u16 *)addr;
  	while (count--) {
  		out_be32((void*)port, cpu_to_le16(*ptr++));
  	}
  }
  
  static void
  scc_ide_outsl(unsigned long port, void *addr, u32 count)
  {
  	u16 *ptr = (u16 *)addr;
  	while (count--) {
  		out_be32((void*)port, cpu_to_le16(*ptr++));
  		out_be32((void*)port, cpu_to_le16(*ptr++));
  	}
  }
  
  /**

   *	scc_set_pio_mode	-	set host controller for PIO mode

   *	@hwif: port

   *	@drive: drive

   *
   *	Load the timing settings for this device mode into the
   *	controller.
   */

  static void scc_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)

  {

  	struct scc_ports *ports = ide_get_hwifdata(hwif);
  	unsigned long ctl_base = ports->ctl;
  	unsigned long cckctrl_port = ctl_base + 0xff0;
  	unsigned long piosht_port = ctl_base + 0x000;
  	unsigned long pioct_port = ctl_base + 0x004;
  	unsigned long reg;

  	int offset;

  	const u8 pio = drive->pio_mode - XFER_PIO_0;

  	reg = in_be32((void __iomem *)cckctrl_port);

  	if (reg & CCKCTRL_ATACLKOEN) {
  		offset = 1; /* 133MHz */
  	} else {
  		offset = 0; /* 100MHz */
  	}

  	reg = JCHSTtbl[offset][pio] << 16 | JCHHTtbl[offset][pio];

  	out_be32((void __iomem *)piosht_port, reg);

  	reg = JCHCTtbl[offset][pio];

  	out_be32((void __iomem *)pioct_port, reg);

  }

  /**

   *	scc_set_dma_mode	-	set host controller for DMA mode

   *	@hwif: port

   *	@drive: drive

   *
   *	Load the timing settings for this device mode into the
   *	controller.
   */

  static void scc_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)

  {

  	struct scc_ports *ports = ide_get_hwifdata(hwif);
  	unsigned long ctl_base = ports->ctl;
  	unsigned long cckctrl_port = ctl_base + 0xff0;
  	unsigned long mdmact_port = ctl_base + 0x008;
  	unsigned long mcrcst_port = ctl_base + 0x00c;
  	unsigned long sdmact_port = ctl_base + 0x010;
  	unsigned long scrcst_port = ctl_base + 0x014;
  	unsigned long udenvt_port = ctl_base + 0x018;
  	unsigned long tdvhsel_port   = ctl_base + 0x020;

  	int is_slave = drive->dn & 1;

  	int offset, idx;
  	unsigned long reg;
  	unsigned long jcactsel;

  	const u8 speed = drive->dma_mode;

  	reg = in_be32((void __iomem *)cckctrl_port);

  	if (reg & CCKCTRL_ATACLKOEN) {
  		offset = 1; /* 133MHz */
  	} else {
  		offset = 0; /* 100MHz */
  	}

  	idx = speed - XFER_UDMA_0;

  
  	jcactsel = JCACTSELtbl[offset][idx];
  	if (is_slave) {

  		out_be32((void __iomem *)sdmact_port, JCHDCTxtbl[offset][idx]);
  		out_be32((void __iomem *)scrcst_port, JCSTWTxtbl[offset][idx]);
  		jcactsel = jcactsel << 2;
  		out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_SLAVE) | jcactsel);

  	} else {

  		out_be32((void __iomem *)mdmact_port, JCHDCTxtbl[offset][idx]);
  		out_be32((void __iomem *)mcrcst_port, JCSTWTxtbl[offset][idx]);
  		out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_MASTER) | jcactsel);

  	}
  	reg = JCTSStbl[offset][idx] << 16 | JCENVTtbl[offset][idx];

  	out_be32((void __iomem *)udenvt_port, reg);

  }

  static void scc_dma_host_set(ide_drive_t *drive, int on)
  {
  	ide_hwif_t *hwif = drive->hwif;

  	u8 unit = drive->dn & 1;

  	u8 dma_stat = scc_dma_sff_read_status(hwif);

  
  	if (on)
  		dma_stat |= (1 << (5 + unit));
  	else
  		dma_stat &= ~(1 << (5 + unit));

  	scc_ide_outb(dma_stat, hwif->dma_base + 4);

  }

  /**

   *	scc_dma_setup	-	begin a DMA phase

   *	@drive: target device

   *	@cmd: command

   *
   *	Build an IDE DMA PRD (IDE speak for scatter gather table)
   *	and then set up the DMA transfer registers.
   *
   *	Returns 0 on success. If a PIO fallback is required then 1
   *	is returned.
   */

  static int scc_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)

  {
  	ide_hwif_t *hwif = drive->hwif;

  	u32 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR;

  	u8 dma_stat;

  	/* fall back to pio! */

  	if (ide_build_dmatable(drive, cmd) == 0)

  		return 1;

  
  	/* PRD table */

  	out_be32((void __iomem *)(hwif->dma_base + 8), hwif->dmatable_dma);

  
  	/* specify r/w */

  	out_be32((void __iomem *)hwif->dma_base, rw);

  	/* read DMA status for INTR & ERROR flags */

  	dma_stat = scc_dma_sff_read_status(hwif);

  
  	/* clear INTR & ERROR flags */

  	out_be32((void __iomem *)(hwif->dma_base + 4), dma_stat | 6);

  	return 0;
  }

  static void scc_dma_start(ide_drive_t *drive)
  {
  	ide_hwif_t *hwif = drive->hwif;

  	u8 dma_cmd = scc_ide_inb(hwif->dma_base);

  
  	/* start DMA */

  	scc_ide_outb(dma_cmd | 1, hwif->dma_base);

  }
  
  static int __scc_dma_end(ide_drive_t *drive)
  {
  	ide_hwif_t *hwif = drive->hwif;
  	u8 dma_stat, dma_cmd;

  	/* get DMA command mode */

  	dma_cmd = scc_ide_inb(hwif->dma_base);

  	/* stop DMA */

  	scc_ide_outb(dma_cmd & ~1, hwif->dma_base);

  	/* get DMA status */

  	dma_stat = scc_dma_sff_read_status(hwif);

  	/* clear the INTR & ERROR bits */

  	scc_ide_outb(dma_stat | 6, hwif->dma_base + 4);

  	/* verify good DMA status */

  	return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
  }

  
  /**

   *	scc_dma_end	-	Stop DMA

   *	@drive: IDE drive
   *
   *	Check and clear INT Status register.

   *	Then call __scc_dma_end().

   */

  static int scc_dma_end(ide_drive_t *drive)

  {

  	ide_hwif_t *hwif = drive->hwif;

  	void __iomem *dma_base = (void __iomem *)hwif->dma_base;

  	unsigned long intsts_port = hwif->dma_base + 0x014;
  	u32 reg;

  	int dma_stat, data_loss = 0;
  	static int retry = 0;
  
  	/* errata A308 workaround: Step5 (check data loss) */
  	/* We don't check non ide_disk because it is limited to UDMA4 */

  	if (!(in_be32((void __iomem *)hwif->io_ports.ctl_addr)

  	      & ATA_ERR) &&

  	    drive->media == ide_disk && drive->current_speed > XFER_UDMA_4) {
  		reg = in_be32((void __iomem *)intsts_port);
  		if (!(reg & INTSTS_ACTEINT)) {
  			printk(KERN_WARNING "%s: operation failed (transfer data loss)
  ",
  			       drive->name);
  			data_loss = 1;
  			if (retry++) {

  				struct request *rq = hwif->rq;

  				ide_drive_t *drive;
  				int i;

  				/* ERROR_RESET and drive->crc_count are needed
  				 * to reduce DMA transfer mode in retry process.
  				 */
  				if (rq)
  					rq->errors |= ERROR_RESET;

  				ide_port_for_each_dev(i, drive, hwif)

  					drive->crc_count++;

  			}
  		}
  	}

  
  	while (1) {

  		reg = in_be32((void __iomem *)intsts_port);

  
  		if (reg & INTSTS_SERROR) {
  			printk(KERN_WARNING "%s: SERROR
  ", SCC_PATA_NAME);

  			out_be32((void __iomem *)intsts_port, INTSTS_SERROR|INTSTS_BMSINT);

  			out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);

  			continue;
  		}
  
  		if (reg & INTSTS_PRERR) {
  			u32 maea0, maec0;
  			unsigned long ctl_base = hwif->config_data;

  			maea0 = in_be32((void __iomem *)(ctl_base + 0xF50));
  			maec0 = in_be32((void __iomem *)(ctl_base + 0xF54));

  
  			printk(KERN_WARNING "%s: PRERR [addr:%x cmd:%x]
  ", SCC_PATA_NAME, maea0, maec0);

  			out_be32((void __iomem *)intsts_port, INTSTS_PRERR|INTSTS_BMSINT);

  			out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);

  			continue;
  		}
  
  		if (reg & INTSTS_RERR) {
  			printk(KERN_WARNING "%s: Response Error
  ", SCC_PATA_NAME);

  			out_be32((void __iomem *)intsts_port, INTSTS_RERR|INTSTS_BMSINT);

  			out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);

  			continue;
  		}
  
  		if (reg & INTSTS_ICERR) {

  			out_be32(dma_base, in_be32(dma_base) & ~QCHCD_IOS_SS);

  
  			printk(KERN_WARNING "%s: Illegal Configuration
  ", SCC_PATA_NAME);

  			out_be32((void __iomem *)intsts_port, INTSTS_ICERR|INTSTS_BMSINT);

  			continue;
  		}
  
  		if (reg & INTSTS_BMSINT) {
  			printk(KERN_WARNING "%s: Internal Bus Error
  ", SCC_PATA_NAME);

  			out_be32((void __iomem *)intsts_port, INTSTS_BMSINT);

  
  			ide_do_reset(drive);
  			continue;
  		}
  
  		if (reg & INTSTS_BMHE) {

  			out_be32((void __iomem *)intsts_port, INTSTS_BMHE);

  			continue;
  		}
  
  		if (reg & INTSTS_ACTEINT) {

  			out_be32((void __iomem *)intsts_port, INTSTS_ACTEINT);

  			continue;
  		}
  
  		if (reg & INTSTS_IOIRQS) {

  			out_be32((void __iomem *)intsts_port, INTSTS_IOIRQS);

  			continue;
  		}
  		break;
  	}

  	dma_stat = __scc_dma_end(drive);

  	if (data_loss)
  		dma_stat |= 2; /* emulate DMA error (to retry command) */
  	return dma_stat;

  }

  /* returns 1 if dma irq issued, 0 otherwise */
  static int scc_dma_test_irq(ide_drive_t *drive)
  {

  	ide_hwif_t *hwif = drive->hwif;

  	u32 int_stat = in_be32((void __iomem *)hwif->dma_base + 0x014);

  	/* SCC errata A252,A308 workaround: Step4 */

  	if ((in_be32((void __iomem *)hwif->io_ports.ctl_addr)

  	     & ATA_ERR) &&

  	    (int_stat & INTSTS_INTRQ))

  		return 1;

  	/* SCC errata A308 workaround: Step5 (polling IOIRQS) */
  	if (int_stat & INTSTS_IOIRQS)

  		return 1;

  	return 0;
  }

  static u8 scc_udma_filter(ide_drive_t *drive)
  {
  	ide_hwif_t *hwif = drive->hwif;
  	u8 mask = hwif->ultra_mask;
  
  	/* errata A308 workaround: limit non ide_disk drive to UDMA4 */
  	if ((drive->media != ide_disk) && (mask & 0xE0)) {
  		printk(KERN_INFO "%s: limit %s to UDMA4
  ",
  		       SCC_PATA_NAME, drive->name);

  		mask = ATA_UDMA4;

  	}
  
  	return mask;
  }

  /**
   *	setup_mmio_scc	-	map CTRL/BMID region
   *	@dev: PCI device we are configuring
   *	@name: device name
   *
   */
  
  static int setup_mmio_scc (struct pci_dev *dev, const char *name)
  {

  	void __iomem *ctl_addr;
  	void __iomem *dma_addr;

  	int i, ret;

  
  	for (i = 0; i < MAX_HWIFS; i++) {
  		if (scc_ports[i].ctl == 0)
  			break;
  	}
  	if (i >= MAX_HWIFS)
  		return -ENOMEM;

  	ret = pci_request_selected_regions(dev, (1 << 2) - 1, name);
  	if (ret < 0) {
  		printk(KERN_ERR "%s: can't reserve resources
  ", name);
  		return ret;

  	}

  	ctl_addr = pci_ioremap_bar(dev, 0);
  	if (!ctl_addr)

  		goto fail_0;

  	dma_addr = pci_ioremap_bar(dev, 1);
  	if (!dma_addr)

  		goto fail_1;

  
  	pci_set_master(dev);
  	scc_ports[i].ctl = (unsigned long)ctl_addr;
  	scc_ports[i].dma = (unsigned long)dma_addr;
  	pci_set_drvdata(dev, (void *) &scc_ports[i]);
  
  	return 1;

   fail_1:

  	iounmap(ctl_addr);

   fail_0:
  	return -ENOMEM;
  }

  static int scc_ide_setup_pci_device(struct pci_dev *dev,
  				    const struct ide_port_info *d)
  {
  	struct scc_ports *ports = pci_get_drvdata(dev);

  	struct ide_host *host;

  	struct ide_hw hw, *hws[] = { &hw };

  	int i, rc;

  	memset(&hw, 0, sizeof(hw));

  	for (i = 0; i <= 8; i++)
  		hw.io_ports_array[i] = ports->dma + 0x20 + i * 4;

  	hw.irq = dev->irq;
  	hw.dev = &dev->dev;

  	rc = ide_host_add(d, hws, 1, &host);

  	if (rc)
  		return rc;

  
  	ports->host = host;

  
  	return 0;
  }

  /**
   *	init_setup_scc	-	set up an SCC PATA Controller
   *	@dev: PCI device

   *	@d: IDE port info

   *
   *	Perform the initial set up for this device.
   */

  static int init_setup_scc(struct pci_dev *dev, const struct ide_port_info *d)

  {
  	unsigned long ctl_base;
  	unsigned long dma_base;
  	unsigned long cckctrl_port;
  	unsigned long intmask_port;
  	unsigned long mode_port;
  	unsigned long ecmode_port;

  	u32 reg = 0;
  	struct scc_ports *ports;
  	int rc;

  	rc = pci_enable_device(dev);
  	if (rc)
  		goto end;

  	rc = setup_mmio_scc(dev, d->name);

  	if (rc < 0)
  		goto end;

  
  	ports = pci_get_drvdata(dev);
  	ctl_base = ports->ctl;
  	dma_base = ports->dma;
  	cckctrl_port = ctl_base + 0xff0;
  	intmask_port = dma_base + 0x010;
  	mode_port = ctl_base + 0x024;
  	ecmode_port = ctl_base + 0xf00;

  
  	/* controller initialization */
  	reg = 0;
  	out_be32((void*)cckctrl_port, reg);
  	reg |= CCKCTRL_ATACLKOEN;
  	out_be32((void*)cckctrl_port, reg);
  	reg |= CCKCTRL_LCLKEN | CCKCTRL_OCLKEN;
  	out_be32((void*)cckctrl_port, reg);
  	reg |= CCKCTRL_CRST;
  	out_be32((void*)cckctrl_port, reg);
  
  	for (;;) {
  		reg = in_be32((void*)cckctrl_port);
  		if (reg & CCKCTRL_CRST)
  			break;
  		udelay(5000);
  	}
  
  	reg |= CCKCTRL_ATARESET;
  	out_be32((void*)cckctrl_port, reg);
  
  	out_be32((void*)ecmode_port, ECMODE_VALUE);
  	out_be32((void*)mode_port, MODE_JCUSFEN);
  	out_be32((void*)intmask_port, INTMASK_MSK);

  	rc = scc_ide_setup_pci_device(dev, d);
  
   end:
  	return rc;

  }

  static void scc_tf_load(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)

  {
  	struct ide_io_ports *io_ports = &drive->hwif->io_ports;

  
  	if (valid & IDE_VALID_FEATURE)

  		scc_ide_outb(tf->feature, io_ports->feature_addr);

  	if (valid & IDE_VALID_NSECT)

  		scc_ide_outb(tf->nsect, io_ports->nsect_addr);

  	if (valid & IDE_VALID_LBAL)

  		scc_ide_outb(tf->lbal, io_ports->lbal_addr);

  	if (valid & IDE_VALID_LBAM)

  		scc_ide_outb(tf->lbam, io_ports->lbam_addr);

  	if (valid & IDE_VALID_LBAH)

  		scc_ide_outb(tf->lbah, io_ports->lbah_addr);

  	if (valid & IDE_VALID_DEVICE)

  		scc_ide_outb(tf->device, io_ports->device_addr);

  }

  static void scc_tf_read(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)

  {
  	struct ide_io_ports *io_ports = &drive->hwif->io_ports;

  	if (valid & IDE_VALID_ERROR)

  		tf->error  = scc_ide_inb(io_ports->feature_addr);

  	if (valid & IDE_VALID_NSECT)

  		tf->nsect  = scc_ide_inb(io_ports->nsect_addr);

  	if (valid & IDE_VALID_LBAL)

  		tf->lbal   = scc_ide_inb(io_ports->lbal_addr);

  	if (valid & IDE_VALID_LBAM)

  		tf->lbam   = scc_ide_inb(io_ports->lbam_addr);

  	if (valid & IDE_VALID_LBAH)

  		tf->lbah   = scc_ide_inb(io_ports->lbah_addr);

  	if (valid & IDE_VALID_DEVICE)

  		tf->device = scc_ide_inb(io_ports->device_addr);

  }

  static void scc_input_data(ide_drive_t *drive, struct ide_cmd *cmd,

  			   void *buf, unsigned int len)
  {
  	unsigned long data_addr = drive->hwif->io_ports.data_addr;
  
  	len++;
  
  	if (drive->io_32bit) {
  		scc_ide_insl(data_addr, buf, len / 4);
  
  		if ((len & 3) >= 2)
  			scc_ide_insw(data_addr, (u8 *)buf + (len & ~3), 1);
  	} else
  		scc_ide_insw(data_addr, buf, len / 2);
  }

  static void scc_output_data(ide_drive_t *drive,  struct ide_cmd *cmd,

  			    void *buf, unsigned int len)
  {
  	unsigned long data_addr = drive->hwif->io_ports.data_addr;
  
  	len++;
  
  	if (drive->io_32bit) {
  		scc_ide_outsl(data_addr, buf, len / 4);
  
  		if ((len & 3) >= 2)
  			scc_ide_outsw(data_addr, (u8 *)buf + (len & ~3), 1);
  	} else
  		scc_ide_outsw(data_addr, buf, len / 2);
  }

  /**
   *	init_mmio_iops_scc	-	set up the iops for MMIO
   *	@hwif: interface to set up
   *
   */

  static void init_mmio_iops_scc(ide_hwif_t *hwif)

  {

  	struct pci_dev *dev = to_pci_dev(hwif->dev);

  	struct scc_ports *ports = pci_get_drvdata(dev);
  	unsigned long dma_base = ports->dma;
  
  	ide_set_hwifdata(hwif, ports);

  	hwif->dma_base = dma_base;
  	hwif->config_data = ports->ctl;

  }
  
  /**
   *	init_iops_scc	-	set up iops
   *	@hwif: interface to set up
   *
   *	Do the basic setup for the SCC hardware interface
   *	and then do the MMIO setup.
   */

  static void init_iops_scc(ide_hwif_t *hwif)

  {

  	struct pci_dev *dev = to_pci_dev(hwif->dev);

  	hwif->hwif_data = NULL;
  	if (pci_get_drvdata(dev) == NULL)
  		return;
  	init_mmio_iops_scc(hwif);
  }

  static int scc_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)

  {
  	return ide_allocate_dma_engine(hwif);
  }

  static u8 scc_cable_detect(ide_hwif_t *hwif)

  {
  	return ATA_CBL_PATA80;
  }

  /**
   *	init_hwif_scc	-	set up hwif
   *	@hwif: interface to set up
   *
   *	We do the basic set up of the interface structure. The SCC
   *	requires several custom handlers so we override the default
   *	ide DMA handlers appropriately.
   */

  static void init_hwif_scc(ide_hwif_t *hwif)

  {

  	/* PTERADD */
  	out_be32((void __iomem *)(hwif->dma_base + 0x018), hwif->dmatable_dma);

  	if (in_be32((void __iomem *)(hwif->config_data + 0xff0)) & CCKCTRL_ATACLKOEN)
  		hwif->ultra_mask = ATA_UDMA6; /* 133MHz */
  	else
  		hwif->ultra_mask = ATA_UDMA5; /* 100MHz */

  }

  static const struct ide_tp_ops scc_tp_ops = {
  	.exec_command		= scc_exec_command,
  	.read_status		= scc_read_status,
  	.read_altstatus		= scc_read_altstatus,

  	.write_devctl		= scc_write_devctl,

  	.dev_select		= ide_dev_select,

  	.tf_load		= scc_tf_load,
  	.tf_read		= scc_tf_read,
  
  	.input_data		= scc_input_data,
  	.output_data		= scc_output_data,
  };

  static const struct ide_port_ops scc_port_ops = {
  	.set_pio_mode		= scc_set_pio_mode,
  	.set_dma_mode		= scc_set_dma_mode,
  	.udma_filter		= scc_udma_filter,
  	.cable_detect		= scc_cable_detect,
  };

  static const struct ide_dma_ops scc_dma_ops = {

  	.dma_host_set		= scc_dma_host_set,

  	.dma_setup		= scc_dma_setup,

  	.dma_start		= scc_dma_start,

  	.dma_end		= scc_dma_end,
  	.dma_test_irq		= scc_dma_test_irq,

  	.dma_lost_irq		= ide_dma_lost_irq,

  	.dma_timer_expiry	= ide_dma_sff_timer_expiry,

  	.dma_sff_read_status	= scc_dma_sff_read_status,

  };

  static const struct ide_port_info scc_chipset = {

  	.name		= "sccIDE",
  	.init_iops	= init_iops_scc,
  	.init_dma	= scc_init_dma,
  	.init_hwif	= init_hwif_scc,
  	.tp_ops		= &scc_tp_ops,
  	.port_ops	= &scc_port_ops,
  	.dma_ops	= &scc_dma_ops,
  	.host_flags	= IDE_HFLAG_SINGLE,

  	.irq_flags	= IRQF_SHARED,

  	.pio_mask	= ATA_PIO4,

  	.chipset	= ide_pci,

  };
  
  /**
   *	scc_init_one	-	pci layer discovery entry
   *	@dev: PCI device
   *	@id: ident table entry
   *
   *	Called by the PCI code when it finds an SCC PATA controller.
   *	We then use the IDE PCI generic helper to do most of the work.
   */

  static int scc_init_one(struct pci_dev *dev, const struct pci_device_id *id)

  {

  	return init_setup_scc(dev, &scc_chipset);

  }
  
  /**
   *	scc_remove	-	pci layer remove entry
   *	@dev: PCI device
   *
   *	Called by the PCI code when it removes an SCC PATA controller.
   */

  static void scc_remove(struct pci_dev *dev)

  {
  	struct scc_ports *ports = pci_get_drvdata(dev);

  	struct ide_host *host = ports->host;

  	ide_host_remove(host);

  	iounmap((void*)ports->dma);
  	iounmap((void*)ports->ctl);

  	pci_release_selected_regions(dev, (1 << 2) - 1);

  	memset(ports, 0, sizeof(*ports));
  }

  static const struct pci_device_id scc_pci_tbl[] = {
  	{ PCI_VDEVICE(TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SCC_ATA), 0 },

  	{ 0, },
  };
  MODULE_DEVICE_TABLE(pci, scc_pci_tbl);

  static struct pci_driver scc_pci_driver = {

  	.name = "SCC IDE",
  	.id_table = scc_pci_tbl,
  	.probe = scc_init_one,

  	.remove = scc_remove,

  };

  static int __init scc_ide_init(void)

  {

  	return ide_pci_register_driver(&scc_pci_driver);

  }

  static void __exit scc_ide_exit(void)

  {

  	pci_unregister_driver(&scc_pci_driver);

  }

  module_init(scc_ide_init);
  module_exit(scc_ide_exit);

  
  MODULE_DESCRIPTION("PCI driver module for Toshiba SCC IDE");
  MODULE_LICENSE("GPL");