drivers/ata/pata_ns87410.c - kernel/panda - Git at Google

 /*
  * pata_ns87410.c 	- National Semiconductor 87410 PATA for new ATA layer
  *			  (C) 2006 Red Hat Inc
  *			  Alan Cox <alan@redhat.com>
  *
  *  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, 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; see the file COPYING.  If not, write to
  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/blkdev.h>
 #include <linux/delay.h>
 #include <scsi/scsi_host.h>
 #include <linux/libata.h>

 #define DRV_NAME "pata_ns87410"
 #define DRV_VERSION "0.4.3"

 /**
  *	ns87410_pre_reset		-	probe begin
  *	@ap: ATA port
  *
  *	Set up cable type and use generic probe init
  */

 static int ns87410_pre_reset(struct ata_port *ap)
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const struct pci_bits ns87410_enable_bits[] = {
 		{ 0x43, 1, 0x08, 0x08 },
 		{ 0x47, 1, 0x08, 0x08 }
 	};

 	if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
 		return -ENOENT;
 	ap->cbl = ATA_CBL_PATA40;
 	return ata_std_prereset(ap);
 }

 /**
  *	ns87410_error_handler		-	probe reset
  *	@ap: ATA port
  *
  *	Perform the ATA probe and bus reset sequence plus specific handling
  *	for this hardware. The MPIIX has the enable bits in a different place
  *	to PIIX4 and friends. As a pure PIO device it has no cable detect
  */

 static void ns87410_error_handler(struct ata_port *ap)
 {
 	ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
 }

 /**
  *	ns87410_set_piomode	-	set initial PIO mode data
  *	@ap: ATA interface
  *	@adev: ATA device
  *
  *	Program timing data. This is kept per channel not per device,
  *	and only affects the data port.
  */

 static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	int port = 0x40 + 4 * ap->port_no;
 	u8 idetcr, idefr;
 	struct ata_timing at;

 	static const u8 activebits[15] = {
 		0, 1, 2, 3, 4,
 		5, 5, 6, 6, 6,
 		6, 7, 7, 7, 7
 	};

 	static const u8 recoverbits[12] = {
 		0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
 	};

 	pci_read_config_byte(pdev, port + 3, &idefr);

 	if (ata_pio_need_iordy(adev))
 		idefr |= 0x04;	/* IORDY enable */
 	else
 		idefr &= ~0x04;

 	if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
 		dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
 		return;
 	}

 	at.active = FIT(at.active, 2, 16) - 2;
 	at.setup = FIT(at.setup, 1, 4) - 1;
 	at.recover = FIT(at.recover, 1, 12) - 1;

 	idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];

 	pci_write_config_byte(pdev, port, idetcr);
 	pci_write_config_byte(pdev, port + 3, idefr);
 	/* We use ap->private_data as a pointer to the device currently
 	   loaded for timing */
 	ap->private_data = adev;
 }

 /**
  *	ns87410_qc_issue_prot	-	command issue
  *	@qc: command pending
  *
  *	Called when the libata layer is about to issue a command. We wrap
  *	this interface so that we can load the correct ATA timings if
  *	neccessary.
  */

 static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc)
 {
 	struct ata_port *ap = qc->ap;
 	struct ata_device *adev = qc->dev;

 	/* If modes have been configured and the channel data is not loaded
 	   then load it. We have to check if pio_mode is set as the core code
 	   does not set adev->pio_mode to XFER_PIO_0 while probing as would be
 	   logical */

 	if (adev->pio_mode && adev != ap->private_data)
 		ns87410_set_piomode(ap, adev);

 	return ata_qc_issue_prot(qc);
 }

 static struct scsi_host_template ns87410_sht = {
 	.module			= THIS_MODULE,
 	.name			= DRV_NAME,
 	.ioctl			= ata_scsi_ioctl,
 	.queuecommand		= ata_scsi_queuecmd,
 	.can_queue		= ATA_DEF_QUEUE,
 	.this_id		= ATA_SHT_THIS_ID,
 	.sg_tablesize		= LIBATA_MAX_PRD,
 	.max_sectors		= ATA_MAX_SECTORS,
 	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
 	.emulated		= ATA_SHT_EMULATED,
 	.use_clustering		= ATA_SHT_USE_CLUSTERING,
 	.proc_name		= DRV_NAME,
 	.dma_boundary		= ATA_DMA_BOUNDARY,
 	.slave_configure	= ata_scsi_slave_config,
 	.slave_destroy		= ata_scsi_slave_destroy,
 	.bios_param		= ata_std_bios_param,
 	.resume			= ata_scsi_device_resume,
 	.suspend		= ata_scsi_device_suspend,
 };

 static struct ata_port_operations ns87410_port_ops = {
 	.port_disable	= ata_port_disable,
 	.set_piomode	= ns87410_set_piomode,

 	.tf_load	= ata_tf_load,
 	.tf_read	= ata_tf_read,
 	.check_status 	= ata_check_status,
 	.exec_command	= ata_exec_command,
 	.dev_select 	= ata_std_dev_select,

 	.freeze		= ata_bmdma_freeze,
 	.thaw		= ata_bmdma_thaw,
 	.error_handler	= ns87410_error_handler,
 	.post_internal_cmd = ata_bmdma_post_internal_cmd,

 	.qc_prep 	= ata_qc_prep,
 	.qc_issue	= ns87410_qc_issue_prot,

 	.data_xfer	= ata_pio_data_xfer,

 	.irq_handler	= ata_interrupt,
 	.irq_clear	= ata_bmdma_irq_clear,

 	.port_start	= ata_port_start,
 	.port_stop	= ata_port_stop,
 	.host_stop	= ata_host_stop
 };

 static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	static struct ata_port_info info = {
 		.sht = &ns87410_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x0F,
 		.port_ops = &ns87410_port_ops
 	};
 	static struct ata_port_info *port_info[2] = {&info, &info};
 	return ata_pci_init_one(dev, port_info, 2);
 }

 static const struct pci_device_id ns87410[] = {
 	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },

 	{ },
 };

 static struct pci_driver ns87410_pci_driver = {
 	.name 		= DRV_NAME,
 	.id_table	= ns87410,
 	.probe 		= ns87410_init_one,
 	.remove		= ata_pci_remove_one,
 	.suspend	= ata_pci_device_suspend,
 	.resume		= ata_pci_device_resume,
 };

 static int __init ns87410_init(void)
 {
 	return pci_register_driver(&ns87410_pci_driver);
 }

 static void __exit ns87410_exit(void)
 {
 	pci_unregister_driver(&ns87410_pci_driver);
 }

 MODULE_AUTHOR("Alan Cox");
 MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
 MODULE_LICENSE("GPL");
 MODULE_DEVICE_TABLE(pci, ns87410);
 MODULE_VERSION(DRV_VERSION);

 module_init(ns87410_init);
 module_exit(ns87410_exit);
	/*
	* pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
	* (C) 2006 Red Hat Inc
	* Alan Cox <alan@redhat.com>
	*
	* 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, 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; see the file COPYING. If not, write to
	* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/pci.h>
	#include <linux/init.h>
	#include <linux/blkdev.h>
	#include <linux/delay.h>
	#include <scsi/scsi_host.h>
	#include <linux/libata.h>

	#define DRV_NAME "pata_ns87410"
	#define DRV_VERSION "0.4.3"

	/**
	* ns87410_pre_reset - probe begin
	* @ap: ATA port
	*
	* Set up cable type and use generic probe init
	*/

	static int ns87410_pre_reset(struct ata_port *ap)
	{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	static const struct pci_bits ns87410_enable_bits[] = {
	{ 0x43, 1, 0x08, 0x08 },
	{ 0x47, 1, 0x08, 0x08 }
	};

	if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
	return -ENOENT;
	ap->cbl = ATA_CBL_PATA40;
	return ata_std_prereset(ap);
	}

	/**
	* ns87410_error_handler - probe reset
	* @ap: ATA port
	*
	* Perform the ATA probe and bus reset sequence plus specific handling
	* for this hardware. The MPIIX has the enable bits in a different place
	* to PIIX4 and friends. As a pure PIO device it has no cable detect
	*/

	static void ns87410_error_handler(struct ata_port *ap)
	{
	ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
	}

	/**
	* ns87410_set_piomode - set initial PIO mode data
	* @ap: ATA interface
	* @adev: ATA device
	*
	* Program timing data. This is kept per channel not per device,
	* and only affects the data port.
	*/

	static void ns87410_set_piomode(struct ata_port ap, struct ata_device adev)
	{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	int port = 0x40 + 4 * ap->port_no;
	u8 idetcr, idefr;
	struct ata_timing at;

	static const u8 activebits[15] = {
	0, 1, 2, 3, 4,
	5, 5, 6, 6, 6,
	6, 7, 7, 7, 7
	};

	static const u8 recoverbits[12] = {
	0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
	};

	pci_read_config_byte(pdev, port + 3, &idefr);

	if (ata_pio_need_iordy(adev))
	idefr \|= 0x04; /* IORDY enable */
	else
	idefr &= ~0x04;

	if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
	dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
	return;
	}

	at.active = FIT(at.active, 2, 16) - 2;
	at.setup = FIT(at.setup, 1, 4) - 1;
	at.recover = FIT(at.recover, 1, 12) - 1;

	idetcr = (at.setup << 6) \| (recoverbits[at.recover] << 3) \| activebits[at.active];

	pci_write_config_byte(pdev, port, idetcr);
	pci_write_config_byte(pdev, port + 3, idefr);
	/* We use ap->private_data as a pointer to the device currently
	loaded for timing */
	ap->private_data = adev;
	}

	/**
	* ns87410_qc_issue_prot - command issue
	* @qc: command pending
	*
	* Called when the libata layer is about to issue a command. We wrap
	* this interface so that we can load the correct ATA timings if
	* neccessary.
	*/

	static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc)
	{
	struct ata_port *ap = qc->ap;
	struct ata_device *adev = qc->dev;

	/* If modes have been configured and the channel data is not loaded
	then load it. We have to check if pio_mode is set as the core code
	does not set adev->pio_mode to XFER_PIO_0 while probing as would be
	logical */

	if (adev->pio_mode && adev != ap->private_data)
	ns87410_set_piomode(ap, adev);

	return ata_qc_issue_prot(qc);
	}

	static struct scsi_host_template ns87410_sht = {
	.module = THIS_MODULE,
	.name = DRV_NAME,
	.ioctl = ata_scsi_ioctl,
	.queuecommand = ata_scsi_queuecmd,
	.can_queue = ATA_DEF_QUEUE,
	.this_id = ATA_SHT_THIS_ID,
	.sg_tablesize = LIBATA_MAX_PRD,
	.max_sectors = ATA_MAX_SECTORS,
	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	.emulated = ATA_SHT_EMULATED,
	.use_clustering = ATA_SHT_USE_CLUSTERING,
	.proc_name = DRV_NAME,
	.dma_boundary = ATA_DMA_BOUNDARY,
	.slave_configure = ata_scsi_slave_config,
	.slave_destroy = ata_scsi_slave_destroy,
	.bios_param = ata_std_bios_param,
	.resume = ata_scsi_device_resume,
	.suspend = ata_scsi_device_suspend,
	};

	static struct ata_port_operations ns87410_port_ops = {
	.port_disable = ata_port_disable,
	.set_piomode = ns87410_set_piomode,

	.tf_load = ata_tf_load,
	.tf_read = ata_tf_read,
	.check_status = ata_check_status,
	.exec_command = ata_exec_command,
	.dev_select = ata_std_dev_select,

	.freeze = ata_bmdma_freeze,
	.thaw = ata_bmdma_thaw,
	.error_handler = ns87410_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,

	.qc_prep = ata_qc_prep,
	.qc_issue = ns87410_qc_issue_prot,

	.data_xfer = ata_pio_data_xfer,

	.irq_handler = ata_interrupt,
	.irq_clear = ata_bmdma_irq_clear,

	.port_start = ata_port_start,
	.port_stop = ata_port_stop,
	.host_stop = ata_host_stop
	};

	static int ns87410_init_one(struct pci_dev dev, const struct pci_device_id id)
	{
	static struct ata_port_info info = {
	.sht = &ns87410_sht,
	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	.pio_mask = 0x0F,
	.port_ops = &ns87410_port_ops
	};
	static struct ata_port_info *port_info[2] = {&info, &info};
	return ata_pci_init_one(dev, port_info, 2);
	}

	static const struct pci_device_id ns87410[] = {
	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },

	{ },
	};

	static struct pci_driver ns87410_pci_driver = {
	.name = DRV_NAME,
	.id_table = ns87410,
	.probe = ns87410_init_one,
	.remove = ata_pci_remove_one,
	.suspend = ata_pci_device_suspend,
	.resume = ata_pci_device_resume,
	};

	static int __init ns87410_init(void)
	{
	return pci_register_driver(&ns87410_pci_driver);
	}

	static void __exit ns87410_exit(void)
	{
	pci_unregister_driver(&ns87410_pci_driver);
	}

	MODULE_AUTHOR("Alan Cox");
	MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
	MODULE_LICENSE("GPL");
	MODULE_DEVICE_TABLE(pci, ns87410);
	MODULE_VERSION(DRV_VERSION);

	module_init(ns87410_init);
	module_exit(ns87410_exit);