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

/*
 *  ata_generic.c - Generic PATA/SATA controller driver.
 *  Copyright 2005 Red Hat Inc, 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
 */

enum {
	ATA_GEN_CLASS_MATCH		= (1 << 0),
	ATA_GEN_FORCE_DMA		= (1 << 1),
};

/**
 *	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;
	const struct pci_device_id *id = ap->host->private_data;
	int dma_enabled = 0;
	struct ata_device *dev;

	if (id->driver_data & ATA_GEN_FORCE_DMA) {
		dma_enabled = 0xff;
	} else if (ap->ioaddr.bmdma_addr) {
		/* Bits 5 and 6 indicate if DMA is active on master/slave */
		dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
	}

	ata_for_each_dev(dev, link, ENABLED) {
		/* 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 = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.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 & ATA_GEN_CLASS_MATCH) && 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_bmdma_clear_simplex(dev);

	if (dev->vendor == PCI_VENDOR_ID_ATI) {
		int rc = pcim_enable_device(dev);
		if (rc < 0)
			return rc;
		pcim_pin_device(dev);
	}
	return ata_pci_bmdma_init_one(dev, ppi, &generic_sht, (void *)id, 0);
}

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),
	  .driver_data = ATA_GEN_FORCE_DMA },
	/*
	 * For some reason, MCP89 on MacBook 7,1 doesn't work with
	 * ahci, use ata_generic instead.
	 */
	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP89_SATA,
	  PCI_VENDOR_ID_APPLE, 0xcb89,
	  .driver_data = ATA_GEN_FORCE_DMA },
#if !defined(CONFIG_PATA_TOSHIBA) && !defined(CONFIG_PATA_TOSHIBA_MODULE)
	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3),  },
	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5),  },
#endif	
	/* Must come last. If you add entries adjust this table appropriately */
	{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL),
	  .driver_data = ATA_GEN_CLASS_MATCH },
	{ 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	/*
669a5db4 JG	2	* ata_generic.c - Generic PATA/SATA controller driver.
ab771630	3	* Copyright 2005 Red Hat Inc, all rights reserved.
669a5db4	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
1529c69a TH	35	enum {
	36	ATA_GEN_CLASS_MATCH = (1 << 0),
	37	ATA_GEN_FORCE_DMA = (1 << 1),
	38	};
	39
669a5db4 JG	40	/**
669a5db4 JG	41	* generic_set_mode - mode setting
0260731f	42	* @link: link to set up
b229a7b0	43	* @unused: returned device on error
669a5db4 JG	44	*
	45	* Use a non standard set_mode function. We don't want to be tuned.
	46	* The BIOS configured everything. Our job is not to fiddle. We
	47	* read the dma enabled bits from the PCI configuration of the device
85cd7251	48	* and respect them.
669a5db4	49	*/
85cd7251	50
0260731f	51	static int generic_set_mode(struct ata_link link, struct ata_device *unused)
669a5db4	52	{
0260731f	53	struct ata_port *ap = link->ap;
1529c69a	54	const struct pci_device_id *id = ap->host->private_data;
669a5db4	55	int dma_enabled = 0;
f58229f8	56	struct ata_device *dev;
669a5db4	57
1529c69a TH	58	if (id->driver_data & ATA_GEN_FORCE_DMA) {
	59	dma_enabled = 0xff;
	60	} else if (ap->ioaddr.bmdma_addr) {
	61	/* Bits 5 and 6 indicate if DMA is active on master/slave */
d6f4d5ea	62	dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1529c69a	63	}
85cd7251	64
1eca4365	65	ata_for_each_dev(dev, link, ENABLED) {
f8ab6d8e TH	66	/* We don't really care */
	67	dev->pio_mode = XFER_PIO_0;
	68	dev->dma_mode = XFER_MW_DMA_0;
	69	/* We do need the right mode information for DMA or PIO
	70	and this comes from the current configuration flags */
	71	if (dma_enabled & (1 << (5 + dev->devno))) {
9d3501ab TH	72	unsigned int xfer_mask = ata_id_xfermask(dev->id);
	73	const char *name;
	74
	75	if (xfer_mask & (ATA_MASK_MWDMA \| ATA_MASK_UDMA))
	76	name = ata_mode_string(xfer_mask);
	77	else {
	78	/* SWDMA perhaps? */
	79	name = "DMA";
	80	xfer_mask \|= ata_xfer_mode2mask(XFER_MW_DMA_0);
	81	}
	82
	83	ata_dev_printk(dev, KERN_INFO, "configured for %s\n",
	84	name);
	85
	86	dev->xfer_mode = ata_xfer_mask2mode(xfer_mask);
	87	dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode);
f8ab6d8e TH	88	dev->flags &= ~ATA_DFLAG_PIO;
	89	} else {
	90	ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
	91	dev->xfer_mode = XFER_PIO_0;
	92	dev->xfer_shift = ATA_SHIFT_PIO;
	93	dev->flags \|= ATA_DFLAG_PIO;
669a5db4 JG	94	}
669a5db4 JG	95	}
b229a7b0	96	return 0;
669a5db4 JG	97	}
	98
	99	static struct scsi_host_template generic_sht = {
68d1d07b	100	ATA_BMDMA_SHT(DRV_NAME),
669a5db4 JG	101	};
	102
	103	static struct ata_port_operations generic_port_ops = {
029cfd6b	104	.inherits = &ata_bmdma_port_ops,
eb4a2c7f	105	.cable_detect = ata_cable_unknown,
029cfd6b	106	.set_mode = generic_set_mode,
85cd7251 JG	107	};
85cd7251 JG	108
669a5db4 JG	109	static int all_generic_ide; /* Set to claim all devices */
	110
	111	/**
	112	* ata_generic_init - attach generic IDE
	113	* @dev: PCI device found
	114	* @id: match entry
	115	*
	116	* Called each time a matching IDE interface is found. We check if the
85cd7251	117	* interface is one we wish to claim and if so we perform any chip
669a5db4 JG	118	* specific hacks then let the ATA layer do the heavy lifting.
669a5db4 JG	119	*/
85cd7251	120
669a5db4 JG	121	static int ata_generic_init_one(struct pci_dev dev, const struct pci_device_id id)
	122	{
	123	u16 command;
1626aeb8	124	static const struct ata_port_info info = {
1d2808fd	125	.flags = ATA_FLAG_SLAVE_POSS,
14bdef98 EIB	126	.pio_mask = ATA_PIO4,
14bdef98 EIB	127	.mwdma_mask = ATA_MWDMA2,
bf6263a8	128	.udma_mask = ATA_UDMA5,
669a5db4 JG	129	.port_ops = &generic_port_ops
669a5db4 JG	130	};
1626aeb8	131	const struct ata_port_info *ppi[] = { &info, NULL };
85cd7251	132
669a5db4	133	/* Don't use the generic entry unless instructed to do so */
1529c69a	134	if ((id->driver_data & ATA_GEN_CLASS_MATCH) && all_generic_ide == 0)
669a5db4 JG	135	return -ENODEV;
	136
	137	/* Devices that need care */
	138	if (dev->vendor == PCI_VENDOR_ID_UMC &&
	139	dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
	140	(!(PCI_FUNC(dev->devfn) & 1)))
	141	return -ENODEV;
	142
	143	if (dev->vendor == PCI_VENDOR_ID_OPTI &&
	144	dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
	145	(!(PCI_FUNC(dev->devfn) & 1)))
	146	return -ENODEV;
	147
	148	/* Don't re-enable devices in generic mode or we will break some
	149	motherboards with disabled and unused IDE controllers */
	150	pci_read_config_word(dev, PCI_COMMAND, &command);
	151	if (!(command & PCI_COMMAND_IO))
	152	return -ENODEV;
85cd7251	153
669a5db4	154	if (dev->vendor == PCI_VENDOR_ID_AL)
9363c382	155	ata_pci_bmdma_clear_simplex(dev);
669a5db4	156
05177f17 AC	157	if (dev->vendor == PCI_VENDOR_ID_ATI) {
	158	int rc = pcim_enable_device(dev);
	159	if (rc < 0)
	160	return rc;
	161	pcim_pin_device(dev);
	162	}
1529c69a	163	return ata_pci_bmdma_init_one(dev, ppi, &generic_sht, (void *)id, 0);
669a5db4 JG	164	}
	165
	166	static struct pci_device_id ata_generic[] = {
	167	{ PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
	168	{ PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
85cd7251	169	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), },
669a5db4 JG	170	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), },
	171	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), },
	172	{ PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), },
	173	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), },
	174	{ PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), },
1529c69a TH	175	{ PCI_DEVICE(PCI_VENDOR_ID_CENATEK,PCI_DEVICE_ID_CENATEK_IDE),
1529c69a TH	176	.driver_data = ATA_GEN_FORCE_DMA },
c6353b45 TH	177	/*
	178	* For some reason, MCP89 on MacBook 7,1 doesn't work with
	179	* ahci, use ata_generic instead.
	180	*/
	181	{ PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP89_SATA,
1529c69a TH	182	PCI_VENDOR_ID_APPLE, 0xcb89,
1529c69a TH	183	.driver_data = ATA_GEN_FORCE_DMA },
8e182a90	184	#if !defined(CONFIG_PATA_TOSHIBA) && !defined(CONFIG_PATA_TOSHIBA_MODULE)
669a5db4 JG	185	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
669a5db4 JG	186	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
8e182a90 AC	187	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), },
	188	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), },
	189	#endif
669a5db4	190	/* Must come last. If you add entries adjust this table appropriately */
1529c69a TH	191	{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL),
1529c69a TH	192	.driver_data = ATA_GEN_CLASS_MATCH },
669a5db4 JG	193	{ 0, },
	194	};
	195
	196	static struct pci_driver ata_generic_pci_driver = {
	197	.name = DRV_NAME,
	198	.id_table = ata_generic,
	199	.probe = ata_generic_init_one,
30ced0f0	200	.remove = ata_pci_remove_one,
438ac6d5	201	#ifdef CONFIG_PM
30ced0f0 AC	202	.suspend = ata_pci_device_suspend,
30ced0f0 AC	203	.resume = ata_pci_device_resume,
438ac6d5	204	#endif
669a5db4 JG	205	};
	206
	207	static int __init ata_generic_init(void)
	208	{
3f03c671	209	return pci_register_driver(&ata_generic_pci_driver);
669a5db4 JG	210	}
	211
	212
	213	static void __exit ata_generic_exit(void)
	214	{
	215	pci_unregister_driver(&ata_generic_pci_driver);
	216	}
	217
	218
	219	MODULE_AUTHOR("Alan Cox");
	220	MODULE_DESCRIPTION("low-level driver for generic ATA");
	221	MODULE_LICENSE("GPL");
	222	MODULE_DEVICE_TABLE(pci, ata_generic);
	223	MODULE_VERSION(DRV_VERSION);
	224
	225	module_init(ata_generic_init);
	226	module_exit(ata_generic_exit);
	227
	228	module_param(all_generic_ide, int, 0);