[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	"0.2.2"


/**
 *	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
 *
 *	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 void rz1000_set_mode(struct ata_port *ap)
{
	int i;

	for (i = 0; i < ATA_MAX_DEVICES; i++) {
		struct ata_device *dev = &ap->device[i];
		if (ata_dev_enabled(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;
		}
	}
}


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,
	.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,
};

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,

	.error_handler	= rz1000_error_handler,

	.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_pio_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,

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

/**
 *	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];
	u16 reg;
	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");

	/* Be exceptionally paranoid as we must be sure to apply the fix */
	if (pci_read_config_word(pdev, 0x40, &reg) != 0)
		goto fail;
	reg &= 0xDFFF;
	if (pci_write_config_word(pdev, 0x40, reg) != 0)
		goto fail;
	printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");

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

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
};

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"
	24	#define DRV_VERSION "0.2.2"
	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
	55	*
	56	* Use a non standard set_mode function. We don't want to be tuned. We
	57	* would prefer to be BIOS generic but for the fact our hardware is
	58	* whacked out.
	59	*/
	60
	61	static void rz1000_set_mode(struct ata_port *ap)
	62	{
	63	int i;
	64
65	for (i = 0; i < ATA_MAX_DEVICES; i++) {
66	struct ata_device *dev = &ap->device[i];
67	if (ata_dev_enabled(dev)) {
68	/* We don't really care */
69	dev->pio_mode = XFER_PIO_0;
70	dev->xfer_mode = XFER_PIO_0;
71	dev->xfer_shift = ATA_SHIFT_PIO;
72	dev->flags \|= ATA_DFLAG_PIO;
73	}
74	}
75	}
76
77
78	static struct scsi_host_template rz1000_sht = {
79	.module = THIS_MODULE,
80	.name = DRV_NAME,
81	.ioctl = ata_scsi_ioctl,
82	.queuecommand = ata_scsi_queuecmd,
83	.can_queue = ATA_DEF_QUEUE,
84	.this_id = ATA_SHT_THIS_ID,
85	.sg_tablesize = LIBATA_MAX_PRD,
86	.max_sectors = ATA_MAX_SECTORS,
87	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
88	.emulated = ATA_SHT_EMULATED,
89	.use_clustering = ATA_SHT_USE_CLUSTERING,
90	.proc_name = DRV_NAME,
91	.dma_boundary = ATA_DMA_BOUNDARY,
92	.slave_configure = ata_scsi_slave_config,
afdfe899	93	.slave_destroy = ata_scsi_slave_destroy,
669a5db4 JG	94	.bios_param = ata_std_bios_param,
	95	};
	96
	97	static struct ata_port_operations rz1000_port_ops = {
	98	.set_mode = rz1000_set_mode,
	99
	100	.port_disable = ata_port_disable,
	101	.tf_load = ata_tf_load,
	102	.tf_read = ata_tf_read,
	103	.check_status = ata_check_status,
	104	.exec_command = ata_exec_command,
	105	.dev_select = ata_std_dev_select,
	106
	107	.error_handler = rz1000_error_handler,
	108
	109	.bmdma_setup = ata_bmdma_setup,
	110	.bmdma_start = ata_bmdma_start,
	111	.bmdma_stop = ata_bmdma_stop,
	112	.bmdma_status = ata_bmdma_status,
	113
	114	.qc_prep = ata_qc_prep,
	115	.qc_issue = ata_qc_issue_prot,
bda30288	116
669a5db4 JG	117	.data_xfer = ata_pio_data_xfer,
	118
	119	.freeze = ata_bmdma_freeze,
	120	.thaw = ata_bmdma_thaw,
	121	.error_handler = rz1000_error_handler,
	122	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	123
	124	.irq_handler = ata_interrupt,
	125	.irq_clear = ata_bmdma_irq_clear,
	126
	127	.port_start = ata_port_start,
	128	.port_stop = ata_port_stop,
	129	.host_stop = ata_host_stop
	130	};
	131
	132	/**
	133	* rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
	134	* @pdev: PCI device to register
	135	* @ent: Entry in rz1000_pci_tbl matching with @pdev
	136	*
	137	* Configure an RZ1000 interface. This doesn't require much special
	138	* handling except that we MUST kill the chipset readahead or the
	139	* user may experience data corruption.
	140	*/
	141
	142	static int rz1000_init_one (struct pci_dev pdev, const struct pci_device_id ent)
	143	{
	144	static int printed_version;
	145	struct ata_port_info *port_info[2];
	146	u16 reg;
	147	static struct ata_port_info info = {
	148	.sht = &rz1000_sht,
	149	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	150	.pio_mask = 0x1f,
	151	.port_ops = &rz1000_port_ops
	152	};
	153
	154	if (!printed_version++)
	155	printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
	156
	157	/* Be exceptionally paranoid as we must be sure to apply the fix */
	158	if (pci_read_config_word(pdev, 0x40, &reg) != 0)
	159	goto fail;
	160	reg &= 0xDFFF;
	161	if (pci_write_config_word(pdev, 0x40, reg) != 0)
	162	goto fail;
	163	printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
	164
	165	port_info[0] = &info;
	166	port_info[1] = &info;
	167	return ata_pci_init_one(pdev, port_info, 2);
	168	fail:
	169	printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
	170	/* Not safe to use so skip */
	171	return -ENODEV;
	172	}
	173
2d2744fc JG	174	static const struct pci_device_id pata_rz1000[] = {
	175	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
	176	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
	177
	178	{ },
669a5db4 JG	179	};
	180
	181	static struct pci_driver rz1000_pci_driver = {
2d2744fc	182	.name = DRV_NAME,
669a5db4 JG	183	.id_table = pata_rz1000,
	184	.probe = rz1000_init_one,
	185	.remove = ata_pci_remove_one
	186	};
	187
669a5db4 JG	188	static int __init rz1000_init(void)
	189	{
	190	return pci_register_driver(&rz1000_pci_driver);
	191	}
	192
	193	static void __exit rz1000_exit(void)
	194	{
	195	pci_unregister_driver(&rz1000_pci_driver);
	196	}
	197
	198	MODULE_AUTHOR("Alan Cox");
	199	MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
	200	MODULE_LICENSE("GPL");
	201	MODULE_DEVICE_TABLE(pci, pata_rz1000);
	202	MODULE_VERSION(DRV_VERSION);
	203
	204	module_init(rz1000_init);
	205	module_exit(rz1000_exit);
	206