[deliverable/linux.git] / drivers / ata / pata_rz1000.c

/*
 *  RZ1000/1001 driver based upon
 *
 *  linux/drivers/ide/pci/rz1000.c	Version 0.06	January 12, 2003
 *  Copyright (C) 1995-1998  Linus Torvalds & author (see below)
 *  Principal Author:  mlord@pobox.com (Mark Lord)
 *
 *  See linux/MAINTAINERS for address of current maintainer.
 *
 *  This file provides support for disabling the buggy read-ahead
 *  mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
 */

#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_rz1000"
#define DRV_VERSION	"0.2.3"


/**
 *	rz1000_prereset		-	probe begin
 *	@ap: ATA port
 *
 *	Set up cable type and use generics
 */

static int rz1000_prereset(struct ata_port *ap)
{
	ap->cbl = ATA_CBL_PATA40;
	return ata_std_prereset(ap);
}

/**
 *	rz1000_error_handler		-	probe reset
 *	@ap: ATA port
 *
 *	Perform the ATA standard reset sequence
 */

static void rz1000_error_handler(struct ata_port *ap)
{
	ata_bmdma_drive_eh(ap, rz1000_prereset, ata_std_softreset, NULL, ata_std_postreset);
}

/**
 *	rz1000_set_mode		-	mode setting function
 *	@ap: ATA interface
 *	@unused: returned device on set_mode failure
 *
 *	Use a non standard set_mode function. We don't want to be tuned. We
 *	would prefer to be BIOS generic but for the fact our hardware is
 *	whacked out.
 */

static int rz1000_set_mode(struct ata_port *ap, struct ata_device **unused)
{
	int i;

	for (i = 0; i < ATA_MAX_DEVICES; i++) {
		struct ata_device *dev = &ap->device[i];
		if (ata_dev_ready(dev)) {
			/* We don't really care */
			dev->pio_mode = XFER_PIO_0;
			dev->xfer_mode = XFER_PIO_0;
			dev->xfer_shift = ATA_SHIFT_PIO;
			dev->flags |= ATA_DFLAG_PIO;
			ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
		}
	}
	return 0;
}


static struct scsi_host_template rz1000_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,
	.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,
#ifdef CONFIG_PM
	.resume			= ata_scsi_device_resume,
	.suspend		= ata_scsi_device_suspend,
#endif
};

static struct ata_port_operations rz1000_port_ops = {
	.set_mode	= rz1000_set_mode,

	.port_disable	= ata_port_disable,
	.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,

	.bmdma_setup 	= ata_bmdma_setup,
	.bmdma_start 	= ata_bmdma_start,
	.bmdma_stop	= ata_bmdma_stop,
	.bmdma_status 	= ata_bmdma_status,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.data_xfer	= ata_data_xfer,

	.freeze		= ata_bmdma_freeze,
	.thaw		= ata_bmdma_thaw,
	.error_handler	= rz1000_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,

	.irq_handler	= ata_interrupt,
	.irq_clear	= ata_bmdma_irq_clear,
	.irq_on		= ata_irq_on,
	.irq_ack	= ata_irq_ack,

	.port_start	= ata_port_start,
};

static int rz1000_fifo_disable(struct pci_dev *pdev)
{
	u16 reg;
	/* Be exceptionally paranoid as we must be sure to apply the fix */
	if (pci_read_config_word(pdev, 0x40, &reg) != 0)
		return -1;
	reg &= 0xDFFF;
	if (pci_write_config_word(pdev, 0x40, reg) != 0)
		return -1;
	printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
	return 0;
}

/**
 *	rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
 *	@pdev: PCI device to register
 *	@ent: Entry in rz1000_pci_tbl matching with @pdev
 *
 *	Configure an RZ1000 interface. This doesn't require much special
 *	handling except that we *MUST* kill the chipset readahead or the
 *	user may experience data corruption.
 */

static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
	static int printed_version;
	struct ata_port_info *port_info[2];
	static struct ata_port_info info = {
		.sht = &rz1000_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
		.pio_mask = 0x1f,
		.port_ops = &rz1000_port_ops
	};

	if (!printed_version++)
		printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");

	if (rz1000_fifo_disable(pdev) == 0) {
		port_info[0] = &info;
		port_info[1] = &info;
		return ata_pci_init_one(pdev, port_info, 2);
	}
	printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
	/* Not safe to use so skip */
	return -ENODEV;
}

#ifdef CONFIG_PM
static int rz1000_reinit_one(struct pci_dev *pdev)
{
	/* If this fails on resume (which is a "cant happen" case), we
	   must stop as any progress risks data loss */
	if (rz1000_fifo_disable(pdev))
		panic("rz1000 fifo");
	return ata_pci_device_resume(pdev);
}
#endif

static const struct pci_device_id pata_rz1000[] = {
	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },

	{ },
};

static struct pci_driver rz1000_pci_driver = {
	.name 		= DRV_NAME,
	.id_table	= pata_rz1000,
	.probe 		= rz1000_init_one,
	.remove		= ata_pci_remove_one,
#ifdef CONFIG_PM
	.suspend	= ata_pci_device_suspend,
	.resume		= rz1000_reinit_one,
#endif
};

static int __init rz1000_init(void)
{
	return pci_register_driver(&rz1000_pci_driver);
}

static void __exit rz1000_exit(void)
{
	pci_unregister_driver(&rz1000_pci_driver);
}

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, pata_rz1000);
MODULE_VERSION(DRV_VERSION);

module_init(rz1000_init);
module_exit(rz1000_exit);
Commit	Line	Data
669a5db4 JG	1	/*
	2	* RZ1000/1001 driver based upon
	3	*
	4	* linux/drivers/ide/pci/rz1000.c Version 0.06 January 12, 2003
	5	* Copyright (C) 1995-1998 Linus Torvalds & author (see below)
	6	* Principal Author: mlord@pobox.com (Mark Lord)
	7	*
	8	* See linux/MAINTAINERS for address of current maintainer.
	9	*
	10	* This file provides support for disabling the buggy read-ahead
	11	* mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/pci.h>
	17	#include <linux/init.h>
	18	#include <linux/blkdev.h>
	19	#include <linux/delay.h>
	20	#include <scsi/scsi_host.h>
	21	#include <linux/libata.h>
	22
	23	#define DRV_NAME "pata_rz1000"
ad4a42d2	24	#define DRV_VERSION "0.2.3"
669a5db4 JG	25
	26
	27	/**
	28	* rz1000_prereset - probe begin
	29	* @ap: ATA port
	30	*
	31	* Set up cable type and use generics
	32	*/
	33
	34	static int rz1000_prereset(struct ata_port *ap)
	35	{
	36	ap->cbl = ATA_CBL_PATA40;
	37	return ata_std_prereset(ap);
	38	}
	39
	40	/**
	41	* rz1000_error_handler - probe reset
	42	* @ap: ATA port
	43	*
	44	* Perform the ATA standard reset sequence
	45	*/
	46
	47	static void rz1000_error_handler(struct ata_port *ap)
	48	{
	49	ata_bmdma_drive_eh(ap, rz1000_prereset, ata_std_softreset, NULL, ata_std_postreset);
	50	}
	51
	52	/**
	53	* rz1000_set_mode - mode setting function
	54	* @ap: ATA interface
b229a7b0	55	* @unused: returned device on set_mode failure
669a5db4 JG	56	*
	57	* Use a non standard set_mode function. We don't want to be tuned. We
	58	* would prefer to be BIOS generic but for the fact our hardware is
	59	* whacked out.
	60	*/
	61
b229a7b0	62	static int rz1000_set_mode(struct ata_port ap, struct ata_device *unused)
669a5db4 JG	63	{
	64	int i;
	65
	66	for (i = 0; i < ATA_MAX_DEVICES; i++) {
	67	struct ata_device *dev = &ap->device[i];
b229a7b0	68	if (ata_dev_ready(dev)) {
669a5db4 JG	69	/* We don't really care */
	70	dev->pio_mode = XFER_PIO_0;
	71	dev->xfer_mode = XFER_PIO_0;
	72	dev->xfer_shift = ATA_SHIFT_PIO;
	73	dev->flags \|= ATA_DFLAG_PIO;
e852f705	74	ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
669a5db4 JG	75	}
669a5db4 JG	76	}
b229a7b0	77	return 0;
669a5db4 JG	78	}
	79
	80
	81	static struct scsi_host_template rz1000_sht = {
	82	.module = THIS_MODULE,
	83	.name = DRV_NAME,
	84	.ioctl = ata_scsi_ioctl,
	85	.queuecommand = ata_scsi_queuecmd,
	86	.can_queue = ATA_DEF_QUEUE,
	87	.this_id = ATA_SHT_THIS_ID,
	88	.sg_tablesize = LIBATA_MAX_PRD,
669a5db4 JG	89	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	90	.emulated = ATA_SHT_EMULATED,
	91	.use_clustering = ATA_SHT_USE_CLUSTERING,
	92	.proc_name = DRV_NAME,
	93	.dma_boundary = ATA_DMA_BOUNDARY,
	94	.slave_configure = ata_scsi_slave_config,
afdfe899	95	.slave_destroy = ata_scsi_slave_destroy,
669a5db4	96	.bios_param = ata_std_bios_param,
438ac6d5	97	#ifdef CONFIG_PM
ad4a42d2 A	98	.resume = ata_scsi_device_resume,
ad4a42d2 A	99	.suspend = ata_scsi_device_suspend,
438ac6d5	100	#endif
669a5db4 JG	101	};
	102
	103	static struct ata_port_operations rz1000_port_ops = {
	104	.set_mode = rz1000_set_mode,
	105
	106	.port_disable = ata_port_disable,
	107	.tf_load = ata_tf_load,
	108	.tf_read = ata_tf_read,
	109	.check_status = ata_check_status,
	110	.exec_command = ata_exec_command,
	111	.dev_select = ata_std_dev_select,
	112
669a5db4 JG	113	.bmdma_setup = ata_bmdma_setup,
	114	.bmdma_start = ata_bmdma_start,
	115	.bmdma_stop = ata_bmdma_stop,
	116	.bmdma_status = ata_bmdma_status,
	117
	118	.qc_prep = ata_qc_prep,
	119	.qc_issue = ata_qc_issue_prot,
bda30288	120
0d5ff566	121	.data_xfer = ata_data_xfer,
669a5db4 JG	122
	123	.freeze = ata_bmdma_freeze,
	124	.thaw = ata_bmdma_thaw,
	125	.error_handler = rz1000_error_handler,
	126	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	127
	128	.irq_handler = ata_interrupt,
	129	.irq_clear = ata_bmdma_irq_clear,
246ce3b6 AI	130	.irq_on = ata_irq_on,
246ce3b6 AI	131	.irq_ack = ata_irq_ack,
669a5db4 JG	132
669a5db4 JG	133	.port_start = ata_port_start,
669a5db4 JG	134	};
669a5db4 JG	135
ad4a42d2 A	136	static int rz1000_fifo_disable(struct pci_dev *pdev)
	137	{
	138	u16 reg;
	139	/* Be exceptionally paranoid as we must be sure to apply the fix */
	140	if (pci_read_config_word(pdev, 0x40, &reg) != 0)
	141	return -1;
	142	reg &= 0xDFFF;
	143	if (pci_write_config_word(pdev, 0x40, reg) != 0)
	144	return -1;
	145	printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
	146	return 0;
	147	}
	148
669a5db4 JG	149	/**
	150	* rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
	151	* @pdev: PCI device to register
	152	* @ent: Entry in rz1000_pci_tbl matching with @pdev
	153	*
	154	* Configure an RZ1000 interface. This doesn't require much special
	155	* handling except that we MUST kill the chipset readahead or the
	156	* user may experience data corruption.
	157	*/
	158
	159	static int rz1000_init_one (struct pci_dev pdev, const struct pci_device_id ent)
	160	{
	161	static int printed_version;
	162	struct ata_port_info *port_info[2];
669a5db4 JG	163	static struct ata_port_info info = {
	164	.sht = &rz1000_sht,
	165	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	166	.pio_mask = 0x1f,
	167	.port_ops = &rz1000_port_ops
	168	};
	169
	170	if (!printed_version++)
	171	printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
	172
ad4a42d2 A	173	if (rz1000_fifo_disable(pdev) == 0) {
	174	port_info[0] = &info;
	175	port_info[1] = &info;
	176	return ata_pci_init_one(pdev, port_info, 2);
	177	}
669a5db4 JG	178	printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
	179	/* Not safe to use so skip */
	180	return -ENODEV;
	181	}
	182
438ac6d5	183	#ifdef CONFIG_PM
ad4a42d2 A	184	static int rz1000_reinit_one(struct pci_dev *pdev)
	185	{
	186	/* If this fails on resume (which is a "cant happen" case), we
	187	must stop as any progress risks data loss */
	188	if (rz1000_fifo_disable(pdev))
	189	panic("rz1000 fifo");
	190	return ata_pci_device_resume(pdev);
	191	}
438ac6d5	192	#endif
ad4a42d2	193
2d2744fc JG	194	static const struct pci_device_id pata_rz1000[] = {
	195	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
	196	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
	197
	198	{ },
669a5db4 JG	199	};
	200
	201	static struct pci_driver rz1000_pci_driver = {
2d2744fc	202	.name = DRV_NAME,
669a5db4 JG	203	.id_table = pata_rz1000,
669a5db4 JG	204	.probe = rz1000_init_one,
ad4a42d2	205	.remove = ata_pci_remove_one,
438ac6d5	206	#ifdef CONFIG_PM
ad4a42d2 A	207	.suspend = ata_pci_device_suspend,
ad4a42d2 A	208	.resume = rz1000_reinit_one,
438ac6d5	209	#endif
669a5db4 JG	210	};
669a5db4 JG	211
669a5db4 JG	212	static int __init rz1000_init(void)
	213	{
	214	return pci_register_driver(&rz1000_pci_driver);
	215	}
	216
	217	static void __exit rz1000_exit(void)
	218	{
	219	pci_unregister_driver(&rz1000_pci_driver);
	220	}
	221
	222	MODULE_AUTHOR("Alan Cox");
	223	MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
	224	MODULE_LICENSE("GPL");
	225	MODULE_DEVICE_TABLE(pci, pata_rz1000);
	226	MODULE_VERSION(DRV_VERSION);
	227
	228	module_init(rz1000_init);
	229	module_exit(rz1000_exit);
	230