[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_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_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;
			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,
};

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	= ata_bmdma_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	.cable_detect	= ata_cable_40wire,

	.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
669a5db4 JG	26
669a5db4 JG	27	/**
	28	* rz1000_set_mode - mode setting function
	29	* @ap: ATA interface
b229a7b0	30	* @unused: returned device on set_mode failure
669a5db4 JG	31	*
	32	* Use a non standard set_mode function. We don't want to be tuned. We
	33	* would prefer to be BIOS generic but for the fact our hardware is
	34	* whacked out.
	35	*/
	36
b229a7b0	37	static int rz1000_set_mode(struct ata_port ap, struct ata_device *unused)
669a5db4 JG	38	{
	39	int i;
	40
	41	for (i = 0; i < ATA_MAX_DEVICES; i++) {
	42	struct ata_device *dev = &ap->device[i];
9666f400	43	if (ata_dev_enabled(dev)) {
669a5db4 JG	44	/* We don't really care */
	45	dev->pio_mode = XFER_PIO_0;
	46	dev->xfer_mode = XFER_PIO_0;
	47	dev->xfer_shift = ATA_SHIFT_PIO;
	48	dev->flags \|= ATA_DFLAG_PIO;
e852f705	49	ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
669a5db4 JG	50	}
669a5db4 JG	51	}
b229a7b0	52	return 0;
669a5db4 JG	53	}
	54
	55
	56	static struct scsi_host_template rz1000_sht = {
	57	.module = THIS_MODULE,
	58	.name = DRV_NAME,
	59	.ioctl = ata_scsi_ioctl,
	60	.queuecommand = ata_scsi_queuecmd,
	61	.can_queue = ATA_DEF_QUEUE,
	62	.this_id = ATA_SHT_THIS_ID,
	63	.sg_tablesize = LIBATA_MAX_PRD,
669a5db4 JG	64	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	65	.emulated = ATA_SHT_EMULATED,
	66	.use_clustering = ATA_SHT_USE_CLUSTERING,
	67	.proc_name = DRV_NAME,
	68	.dma_boundary = ATA_DMA_BOUNDARY,
	69	.slave_configure = ata_scsi_slave_config,
afdfe899	70	.slave_destroy = ata_scsi_slave_destroy,
669a5db4 JG	71	.bios_param = ata_std_bios_param,
	72	};
	73
	74	static struct ata_port_operations rz1000_port_ops = {
	75	.set_mode = rz1000_set_mode,
	76
	77	.port_disable = ata_port_disable,
	78	.tf_load = ata_tf_load,
	79	.tf_read = ata_tf_read,
	80	.check_status = ata_check_status,
	81	.exec_command = ata_exec_command,
	82	.dev_select = ata_std_dev_select,
	83
669a5db4 JG	84	.bmdma_setup = ata_bmdma_setup,
	85	.bmdma_start = ata_bmdma_start,
	86	.bmdma_stop = ata_bmdma_stop,
	87	.bmdma_status = ata_bmdma_status,
	88
	89	.qc_prep = ata_qc_prep,
	90	.qc_issue = ata_qc_issue_prot,
bda30288	91
0d5ff566	92	.data_xfer = ata_data_xfer,
669a5db4 JG	93
	94	.freeze = ata_bmdma_freeze,
	95	.thaw = ata_bmdma_thaw,
2a25dfe4	96	.error_handler = ata_bmdma_error_handler,
669a5db4	97	.post_internal_cmd = ata_bmdma_post_internal_cmd,
2a25dfe4	98	.cable_detect = ata_cable_40wire,
669a5db4 JG	99
	100	.irq_handler = ata_interrupt,
	101	.irq_clear = ata_bmdma_irq_clear,
246ce3b6 AI	102	.irq_on = ata_irq_on,
246ce3b6 AI	103	.irq_ack = ata_irq_ack,
669a5db4 JG	104
669a5db4 JG	105	.port_start = ata_port_start,
669a5db4 JG	106	};
669a5db4 JG	107
ad4a42d2 AC	108	static int rz1000_fifo_disable(struct pci_dev *pdev)
	109	{
	110	u16 reg;
	111	/* Be exceptionally paranoid as we must be sure to apply the fix */
	112	if (pci_read_config_word(pdev, 0x40, &reg) != 0)
	113	return -1;
	114	reg &= 0xDFFF;
	115	if (pci_write_config_word(pdev, 0x40, reg) != 0)
	116	return -1;
	117	printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
	118	return 0;
	119	}
	120
669a5db4 JG	121	/**
	122	* rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
	123	* @pdev: PCI device to register
	124	* @ent: Entry in rz1000_pci_tbl matching with @pdev
	125	*
	126	* Configure an RZ1000 interface. This doesn't require much special
	127	* handling except that we MUST kill the chipset readahead or the
	128	* user may experience data corruption.
	129	*/
	130
	131	static int rz1000_init_one (struct pci_dev pdev, const struct pci_device_id ent)
	132	{
	133	static int printed_version;
	134	struct ata_port_info *port_info[2];
669a5db4 JG	135	static struct ata_port_info info = {
	136	.sht = &rz1000_sht,
	137	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	138	.pio_mask = 0x1f,
	139	.port_ops = &rz1000_port_ops
	140	};
	141
	142	if (!printed_version++)
	143	printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
	144
ad4a42d2 AC	145	if (rz1000_fifo_disable(pdev) == 0) {
	146	port_info[0] = &info;
	147	port_info[1] = &info;
	148	return ata_pci_init_one(pdev, port_info, 2);
	149	}
669a5db4 JG	150	printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
	151	/* Not safe to use so skip */
	152	return -ENODEV;
	153	}
	154
438ac6d5	155	#ifdef CONFIG_PM
ad4a42d2 AC	156	static int rz1000_reinit_one(struct pci_dev *pdev)
	157	{
	158	/* If this fails on resume (which is a "cant happen" case), we
	159	must stop as any progress risks data loss */
	160	if (rz1000_fifo_disable(pdev))
	161	panic("rz1000 fifo");
	162	return ata_pci_device_resume(pdev);
	163	}
438ac6d5	164	#endif
ad4a42d2	165
2d2744fc JG	166	static const struct pci_device_id pata_rz1000[] = {
	167	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
	168	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
	169
	170	{ },
669a5db4 JG	171	};
	172
	173	static struct pci_driver rz1000_pci_driver = {
2d2744fc	174	.name = DRV_NAME,
669a5db4 JG	175	.id_table = pata_rz1000,
669a5db4 JG	176	.probe = rz1000_init_one,
ad4a42d2	177	.remove = ata_pci_remove_one,
438ac6d5	178	#ifdef CONFIG_PM
ad4a42d2 AC	179	.suspend = ata_pci_device_suspend,
ad4a42d2 AC	180	.resume = rz1000_reinit_one,
438ac6d5	181	#endif
669a5db4 JG	182	};
669a5db4 JG	183
669a5db4 JG	184	static int __init rz1000_init(void)
	185	{
	186	return pci_register_driver(&rz1000_pci_driver);
	187	}
	188
	189	static void __exit rz1000_exit(void)
	190	{
	191	pci_unregister_driver(&rz1000_pci_driver);
	192	}
	193
	194	MODULE_AUTHOR("Alan Cox");
	195	MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
	196	MODULE_LICENSE("GPL");
	197	MODULE_DEVICE_TABLE(pci, pata_rz1000);
	198	MODULE_VERSION(DRV_VERSION);
	199
	200	module_init(rz1000_init);
	201	module_exit(rz1000_exit);
	202