[net-next-2.6.git] / drivers / ata / ata_generic.c

/*
 *  ata_generic.c - Generic PATA/SATA controller driver.
 *  Copyright 2005 Red Hat Inc <alan@redhat.com>, all rights reserved.
 *
 *  Elements from ide/pci/generic.c
 *	    Copyright (C) 2001-2002	Andre Hedrick <andre@linux-ide.org>
 *	    Portions (C) Copyright 2002  Red Hat Inc <alan@redhat.com>
 *
 *  May be copied or modified under the terms of the GNU General Public License
 *
 *  Driver for PCI IDE interfaces implementing the standard bus mastering
 *  interface functionality. This assumes the BIOS did the drive set up and
 *  tuning for us. By default we do not grab all IDE class devices as they
 *  may have other drivers or need fixups to avoid problems. Instead we keep
 *  a default list of stuff without documentation/driver that appears to
 *  work.
 */

#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 "ata_generic"
#define DRV_VERSION "0.2.15"

/*
 *	A generic parallel ATA driver using libata
 */

/**
 *	generic_set_mode	-	mode setting
 *	@link: link to set up
 *	@unused: returned device on error
 *
 *	Use a non standard set_mode function. We don't want to be tuned.
 *	The BIOS configured everything. Our job is not to fiddle. We
 *	read the dma enabled bits from the PCI configuration of the device
 *	and respect them.
 */

static int generic_set_mode(struct ata_link *link, struct ata_device **unused)
{
	struct ata_port *ap = link->ap;
	int dma_enabled = 0;
	struct ata_device *dev;
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);

	/* Bits 5 and 6 indicate if DMA is active on master/slave */
	if (ap->ioaddr.bmdma_addr)
		dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);

	if (pdev->vendor == PCI_VENDOR_ID_CENATEK)
		dma_enabled = 0xFF;

	ata_link_for_each_dev(dev, link) {
		if (!ata_dev_enabled(dev))
			continue;

		/* We don't really care */
		dev->pio_mode = XFER_PIO_0;
		dev->dma_mode = XFER_MW_DMA_0;
		/* We do need the right mode information for DMA or PIO
		   and this comes from the current configuration flags */
		if (dma_enabled & (1 << (5 + dev->devno))) {
			unsigned int xfer_mask = ata_id_xfermask(dev->id);
			const char *name;

			if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
				name = ata_mode_string(xfer_mask);
			else {
				/* SWDMA perhaps? */
				name = "DMA";
				xfer_mask |= ata_xfer_mode2mask(XFER_MW_DMA_0);
			}

			ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
				       name);

			dev->xfer_mode = ata_xfer_mask2mode(xfer_mask);
			dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode);
			dev->flags &= ~ATA_DFLAG_PIO;
		} else {
			ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
			dev->xfer_mode = XFER_PIO_0;
			dev->xfer_shift = ATA_SHIFT_PIO;
			dev->flags |= ATA_DFLAG_PIO;
		}
	}
	return 0;
}

static struct scsi_host_template generic_sht = {
	ATA_BMDMA_SHT(DRV_NAME),
};

static struct ata_port_operations generic_port_ops = {
	.inherits	= &ata_bmdma_port_ops,
	.cable_detect	= ata_cable_unknown,
	.set_mode	= generic_set_mode,
};

static int all_generic_ide;		/* Set to claim all devices */

/**
 *	ata_generic_init		-	attach generic IDE
 *	@dev: PCI device found
 *	@id: match entry
 *
 *	Called each time a matching IDE interface is found. We check if the
 *	interface is one we wish to claim and if so we perform any chip
 *	specific hacks then let the ATA layer do the heavy lifting.
 */

static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	u16 command;
	static const struct ata_port_info info = {
		.flags = ATA_FLAG_SLAVE_POSS,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = ATA_UDMA5,
		.port_ops = &generic_port_ops
	};
	const struct ata_port_info *ppi[] = { &info, NULL };

	/* Don't use the generic entry unless instructed to do so */
	if (id->driver_data == 1 && all_generic_ide == 0)
		return -ENODEV;

	/* Devices that need care */
	if (dev->vendor == PCI_VENDOR_ID_UMC &&
	    dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
	    (!(PCI_FUNC(dev->devfn) & 1)))
		return -ENODEV;

	if (dev->vendor == PCI_VENDOR_ID_OPTI &&
	    dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
	    (!(PCI_FUNC(dev->devfn) & 1)))
		return -ENODEV;

	/* Don't re-enable devices in generic mode or we will break some
	   motherboards with disabled and unused IDE controllers */
	pci_read_config_word(dev, PCI_COMMAND, &command);
	if (!(command & PCI_COMMAND_IO))
		return -ENODEV;

	if (dev->vendor == PCI_VENDOR_ID_AL)
	    	ata_pci_clear_simplex(dev);

	return ata_pci_init_one(dev, ppi, &generic_sht, NULL);
}

static struct pci_device_id ata_generic[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
	{ PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
	{ PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8673F), },
	{ PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886A), },
	{ PCI_DEVICE(PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886BF), },
	{ PCI_DEVICE(PCI_VENDOR_ID_HINT,   PCI_DEVICE_ID_HINT_VXPROII_IDE), },
	{ PCI_DEVICE(PCI_VENDOR_ID_VIA,    PCI_DEVICE_ID_VIA_82C561), },
	{ PCI_DEVICE(PCI_VENDOR_ID_OPTI,   PCI_DEVICE_ID_OPTI_82C558), },
	{ PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
	/* Must come last. If you add entries adjust this table appropriately */
	{ PCI_ANY_ID,		PCI_ANY_ID,			   PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
	{ 0, },
};

static struct pci_driver ata_generic_pci_driver = {
	.name 		= DRV_NAME,
	.id_table	= ata_generic,
	.probe 		= ata_generic_init_one,
	.remove		= ata_pci_remove_one,
#ifdef CONFIG_PM
	.suspend	= ata_pci_device_suspend,
	.resume		= ata_pci_device_resume,
#endif
};

static int __init ata_generic_init(void)
{
	return pci_register_driver(&ata_generic_pci_driver);
}


static void __exit ata_generic_exit(void)
{
	pci_unregister_driver(&ata_generic_pci_driver);
}


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

module_init(ata_generic_init);
module_exit(ata_generic_exit);

module_param(all_generic_ide, int, 0);
Commit	Line	Data
669a5db4 JG	1	/*
	2	* ata_generic.c - Generic PATA/SATA controller driver.
	3	* Copyright 2005 Red Hat Inc <alan@redhat.com>, all rights reserved.
	4	*
85cd7251	5	* Elements from ide/pci/generic.c
669a5db4 JG	6	* Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
	7	* Portions (C) Copyright 2002 Red Hat Inc <alan@redhat.com>
	8	*
	9	* May be copied or modified under the terms of the GNU General Public License
85cd7251	10	*
669a5db4 JG	11	* Driver for PCI IDE interfaces implementing the standard bus mastering
	12	* interface functionality. This assumes the BIOS did the drive set up and
	13	* tuning for us. By default we do not grab all IDE class devices as they
	14	* may have other drivers or need fixups to avoid problems. Instead we keep
	15	* a default list of stuff without documentation/driver that appears to
85cd7251	16	* work.
669a5db4 JG	17	*/
	18
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/pci.h>
	22	#include <linux/init.h>
	23	#include <linux/blkdev.h>
	24	#include <linux/delay.h>
	25	#include <scsi/scsi_host.h>
	26	#include <linux/libata.h>
	27
	28	#define DRV_NAME "ata_generic"
5e8f757c	29	#define DRV_VERSION "0.2.15"
669a5db4 JG	30
	31	/*
	32	* A generic parallel ATA driver using libata
	33	*/
	34
669a5db4 JG	35	/**
669a5db4 JG	36	* generic_set_mode - mode setting
0260731f	37	* @link: link to set up
b229a7b0	38	* @unused: returned device on error
669a5db4 JG	39	*
	40	* Use a non standard set_mode function. We don't want to be tuned.
	41	* The BIOS configured everything. Our job is not to fiddle. We
	42	* read the dma enabled bits from the PCI configuration of the device
85cd7251	43	* and respect them.
669a5db4	44	*/
85cd7251	45
0260731f	46	static int generic_set_mode(struct ata_link link, struct ata_device *unused)
669a5db4	47	{
0260731f	48	struct ata_port *ap = link->ap;
669a5db4	49	int dma_enabled = 0;
f58229f8	50	struct ata_device *dev;
5e8f757c	51	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
669a5db4 JG	52
	53	/* Bits 5 and 6 indicate if DMA is active on master/slave */
	54	if (ap->ioaddr.bmdma_addr)
d6f4d5ea	55	dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
85cd7251	56
5e8f757c AC	57	if (pdev->vendor == PCI_VENDOR_ID_CENATEK)
	58	dma_enabled = 0xFF;
	59
0260731f	60	ata_link_for_each_dev(dev, link) {
f8ab6d8e TH	61	if (!ata_dev_enabled(dev))
	62	continue;
	63
	64	/* We don't really care */
	65	dev->pio_mode = XFER_PIO_0;
	66	dev->dma_mode = XFER_MW_DMA_0;
	67	/* We do need the right mode information for DMA or PIO
	68	and this comes from the current configuration flags */
	69	if (dma_enabled & (1 << (5 + dev->devno))) {
9d3501ab TH	70	unsigned int xfer_mask = ata_id_xfermask(dev->id);
	71	const char *name;
	72
	73	if (xfer_mask & (ATA_MASK_MWDMA \| ATA_MASK_UDMA))
	74	name = ata_mode_string(xfer_mask);
	75	else {
	76	/* SWDMA perhaps? */
	77	name = "DMA";
	78	xfer_mask \|= ata_xfer_mode2mask(XFER_MW_DMA_0);
	79	}
	80
	81	ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
	82	name);
	83
	84	dev->xfer_mode = ata_xfer_mask2mode(xfer_mask);
	85	dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode);
f8ab6d8e TH	86	dev->flags &= ~ATA_DFLAG_PIO;
	87	} else {
	88	ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
	89	dev->xfer_mode = XFER_PIO_0;
	90	dev->xfer_shift = ATA_SHIFT_PIO;
	91	dev->flags \|= ATA_DFLAG_PIO;
669a5db4 JG	92	}
669a5db4 JG	93	}
b229a7b0	94	return 0;
669a5db4 JG	95	}
	96
	97	static struct scsi_host_template generic_sht = {
68d1d07b	98	ATA_BMDMA_SHT(DRV_NAME),
669a5db4 JG	99	};
	100
	101	static struct ata_port_operations generic_port_ops = {
029cfd6b	102	.inherits = &ata_bmdma_port_ops,
eb4a2c7f	103	.cable_detect = ata_cable_unknown,
029cfd6b	104	.set_mode = generic_set_mode,
85cd7251 JG	105	};
85cd7251 JG	106
669a5db4 JG	107	static int all_generic_ide; /* Set to claim all devices */
	108
	109	/**
	110	* ata_generic_init - attach generic IDE
	111	* @dev: PCI device found
	112	* @id: match entry
	113	*
	114	* Called each time a matching IDE interface is found. We check if the
85cd7251	115	* interface is one we wish to claim and if so we perform any chip
669a5db4 JG	116	* specific hacks then let the ATA layer do the heavy lifting.
669a5db4 JG	117	*/
85cd7251	118
669a5db4 JG	119	static int ata_generic_init_one(struct pci_dev dev, const struct pci_device_id id)
	120	{
	121	u16 command;
1626aeb8	122	static const struct ata_port_info info = {
1d2808fd	123	.flags = ATA_FLAG_SLAVE_POSS,
669a5db4 JG	124	.pio_mask = 0x1f,
669a5db4 JG	125	.mwdma_mask = 0x07,
bf6263a8	126	.udma_mask = ATA_UDMA5,
669a5db4 JG	127	.port_ops = &generic_port_ops
669a5db4 JG	128	};
1626aeb8	129	const struct ata_port_info *ppi[] = { &info, NULL };
85cd7251	130
669a5db4 JG	131	/* Don't use the generic entry unless instructed to do so */
	132	if (id->driver_data == 1 && all_generic_ide == 0)
	133	return -ENODEV;
	134
	135	/* Devices that need care */
	136	if (dev->vendor == PCI_VENDOR_ID_UMC &&
	137	dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
	138	(!(PCI_FUNC(dev->devfn) & 1)))
	139	return -ENODEV;
	140
	141	if (dev->vendor == PCI_VENDOR_ID_OPTI &&
	142	dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
	143	(!(PCI_FUNC(dev->devfn) & 1)))
	144	return -ENODEV;
	145
	146	/* Don't re-enable devices in generic mode or we will break some
	147	motherboards with disabled and unused IDE controllers */
	148	pci_read_config_word(dev, PCI_COMMAND, &command);
	149	if (!(command & PCI_COMMAND_IO))
	150	return -ENODEV;
85cd7251	151
669a5db4 JG	152	if (dev->vendor == PCI_VENDOR_ID_AL)
	153	ata_pci_clear_simplex(dev);
	154
887125e3	155	return ata_pci_init_one(dev, ppi, &generic_sht, NULL);
669a5db4 JG	156	}
	157
	158	static struct pci_device_id ata_generic[] = {
	159	{ PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
	160	{ PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
85cd7251	161	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), },
669a5db4 JG	162	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), },
	163	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), },
	164	{ PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), },
	165	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), },
	166	{ PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), },
5e8f757c	167	{ PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), },
669a5db4 JG	168	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
	169	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
	170	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
	171	/* Must come last. If you add entries adjust this table appropriately */
	172	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
	173	{ 0, },
	174	};
	175
	176	static struct pci_driver ata_generic_pci_driver = {
	177	.name = DRV_NAME,
	178	.id_table = ata_generic,
	179	.probe = ata_generic_init_one,
30ced0f0	180	.remove = ata_pci_remove_one,
438ac6d5	181	#ifdef CONFIG_PM
30ced0f0 AC	182	.suspend = ata_pci_device_suspend,
30ced0f0 AC	183	.resume = ata_pci_device_resume,
438ac6d5	184	#endif
669a5db4 JG	185	};
	186
	187	static int __init ata_generic_init(void)
	188	{
3f03c671	189	return pci_register_driver(&ata_generic_pci_driver);
669a5db4 JG	190	}
	191
	192
	193	static void __exit ata_generic_exit(void)
	194	{
	195	pci_unregister_driver(&ata_generic_pci_driver);
	196	}
	197
	198
	199	MODULE_AUTHOR("Alan Cox");
	200	MODULE_DESCRIPTION("low-level driver for generic ATA");
	201	MODULE_LICENSE("GPL");
	202	MODULE_DEVICE_TABLE(pci, ata_generic);
	203	MODULE_VERSION(DRV_VERSION);
	204
	205	module_init(ata_generic_init);
	206	module_exit(ata_generic_exit);
	207
	208	module_param(all_generic_ide, int, 0);