[GitHub/mt8127/android_kernel_alcatel_ttab.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
 *
 *	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,
	.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 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_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
};

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;
}

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);
}

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,
	.suspend	= ata_pci_device_suspend,
	.resume		= rz1000_reinit_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"
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
	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,
669a5db4 JG	86	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	87	.emulated = ATA_SHT_EMULATED,
	88	.use_clustering = ATA_SHT_USE_CLUSTERING,
	89	.proc_name = DRV_NAME,
	90	.dma_boundary = ATA_DMA_BOUNDARY,
	91	.slave_configure = ata_scsi_slave_config,
afdfe899	92	.slave_destroy = ata_scsi_slave_destroy,
669a5db4	93	.bios_param = ata_std_bios_param,
ad4a42d2 AC	94	.resume = ata_scsi_device_resume,
ad4a42d2 AC	95	.suspend = ata_scsi_device_suspend,
669a5db4 JG	96	};
	97
	98	static struct ata_port_operations rz1000_port_ops = {
	99	.set_mode = rz1000_set_mode,
	100
	101	.port_disable = ata_port_disable,
	102	.tf_load = ata_tf_load,
	103	.tf_read = ata_tf_read,
	104	.check_status = ata_check_status,
	105	.exec_command = ata_exec_command,
	106	.dev_select = ata_std_dev_select,
	107
669a5db4 JG	108	.bmdma_setup = ata_bmdma_setup,
	109	.bmdma_start = ata_bmdma_start,
	110	.bmdma_stop = ata_bmdma_stop,
	111	.bmdma_status = ata_bmdma_status,
	112
	113	.qc_prep = ata_qc_prep,
	114	.qc_issue = ata_qc_issue_prot,
bda30288	115
669a5db4 JG	116	.data_xfer = ata_pio_data_xfer,
	117
	118	.freeze = ata_bmdma_freeze,
	119	.thaw = ata_bmdma_thaw,
	120	.error_handler = rz1000_error_handler,
	121	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	122
	123	.irq_handler = ata_interrupt,
	124	.irq_clear = ata_bmdma_irq_clear,
	125
	126	.port_start = ata_port_start,
	127	.port_stop = ata_port_stop,
	128	.host_stop = ata_host_stop
	129	};
	130
ad4a42d2 AC	131	static int rz1000_fifo_disable(struct pci_dev *pdev)
	132	{
	133	u16 reg;
	134	/* Be exceptionally paranoid as we must be sure to apply the fix */
	135	if (pci_read_config_word(pdev, 0x40, &reg) != 0)
	136	return -1;
	137	reg &= 0xDFFF;
	138	if (pci_write_config_word(pdev, 0x40, reg) != 0)
	139	return -1;
	140	printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
	141	return 0;
	142	}
	143
669a5db4 JG	144	/**
	145	* rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
	146	* @pdev: PCI device to register
	147	* @ent: Entry in rz1000_pci_tbl matching with @pdev
	148	*
	149	* Configure an RZ1000 interface. This doesn't require much special
	150	* handling except that we MUST kill the chipset readahead or the
	151	* user may experience data corruption.
	152	*/
	153
	154	static int rz1000_init_one (struct pci_dev pdev, const struct pci_device_id ent)
	155	{
	156	static int printed_version;
	157	struct ata_port_info *port_info[2];
669a5db4 JG	158	static struct ata_port_info info = {
	159	.sht = &rz1000_sht,
	160	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	161	.pio_mask = 0x1f,
	162	.port_ops = &rz1000_port_ops
	163	};
	164
	165	if (!printed_version++)
	166	printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
	167
ad4a42d2 AC	168	if (rz1000_fifo_disable(pdev) == 0) {
	169	port_info[0] = &info;
	170	port_info[1] = &info;
	171	return ata_pci_init_one(pdev, port_info, 2);
	172	}
669a5db4 JG	173	printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
	174	/* Not safe to use so skip */
	175	return -ENODEV;
	176	}
	177
ad4a42d2 AC	178	static int rz1000_reinit_one(struct pci_dev *pdev)
	179	{
	180	/* If this fails on resume (which is a "cant happen" case), we
	181	must stop as any progress risks data loss */
	182	if (rz1000_fifo_disable(pdev))
	183	panic("rz1000 fifo");
	184	return ata_pci_device_resume(pdev);
	185	}
	186
2d2744fc JG	187	static const struct pci_device_id pata_rz1000[] = {
	188	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
	189	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
	190
	191	{ },
669a5db4 JG	192	};
	193
	194	static struct pci_driver rz1000_pci_driver = {
2d2744fc	195	.name = DRV_NAME,
669a5db4 JG	196	.id_table = pata_rz1000,
669a5db4 JG	197	.probe = rz1000_init_one,
ad4a42d2 AC	198	.remove = ata_pci_remove_one,
	199	.suspend = ata_pci_device_suspend,
	200	.resume = rz1000_reinit_one,
669a5db4 JG	201	};
669a5db4 JG	202
669a5db4 JG	203	static int __init rz1000_init(void)
	204	{
	205	return pci_register_driver(&rz1000_pci_driver);
	206	}
	207
	208	static void __exit rz1000_exit(void)
	209	{
	210	pci_unregister_driver(&rz1000_pci_driver);
	211	}
	212
	213	MODULE_AUTHOR("Alan Cox");
	214	MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
	215	MODULE_LICENSE("GPL");
	216	MODULE_DEVICE_TABLE(pci, pata_rz1000);
	217	MODULE_VERSION(DRV_VERSION);
	218
	219	module_init(rz1000_init);
	220	module_exit(rz1000_exit);
	221