[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 "0.2.12"

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

/**
 *	generic_set_mode	-	mode setting
 *	@ap: interface 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_port *ap, struct ata_device **unused)
{
	int dma_enabled = 0;
	int i;

	/* 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_CMD);

	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->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 + i))) {
				ata_id_to_dma_mode(dev, XFER_MW_DMA_0);
				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 = {
	.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 generic_port_ops = {
	.set_mode	= generic_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,

	.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_unknown,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_qc_issue_prot,

	.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 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 = {
		.sht = &generic_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.udma_mask = 0x3f,
		.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);
}

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_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"
8bc3fc47	29	#define DRV_VERSION "0.2.12"
669a5db4 JG	30
	31	/*
	32	* A generic parallel ATA driver using libata
	33	*/
	34
669a5db4 JG	35	/**
	36	* generic_set_mode - mode setting
	37	* @ap: interface 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
b229a7b0	46	static int generic_set_mode(struct ata_port ap, struct ata_device *unused)
669a5db4 JG	47	{
	48	int dma_enabled = 0;
	49	int i;
	50
	51	/* Bits 5 and 6 indicate if DMA is active on master/slave */
	52	if (ap->ioaddr.bmdma_addr)
0d5ff566	53	dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
85cd7251	54
669a5db4 JG	55	for (i = 0; i < ATA_MAX_DEVICES; i++) {
669a5db4 JG	56	struct ata_device *dev = &ap->device[i];
9666f400	57	if (ata_dev_enabled(dev)) {
669a5db4 JG	58	/* We don't really care */
	59	dev->pio_mode = XFER_PIO_0;
	60	dev->dma_mode = XFER_MW_DMA_0;
85cd7251	61	/* We do need the right mode information for DMA or PIO
669a5db4 JG	62	and this comes from the current configuration flags */
669a5db4 JG	63	if (dma_enabled & (1 << (5 + i))) {
616ece2e	64	ata_id_to_dma_mode(dev, XFER_MW_DMA_0);
669a5db4 JG	65	dev->flags &= ~ATA_DFLAG_PIO;
669a5db4 JG	66	} else {
616ece2e	67	ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
669a5db4 JG	68	dev->xfer_mode = XFER_PIO_0;
	69	dev->xfer_shift = ATA_SHIFT_PIO;
	70	dev->flags \|= ATA_DFLAG_PIO;
	71	}
	72	}
	73	}
b229a7b0	74	return 0;
669a5db4 JG	75	}
	76
	77	static struct scsi_host_template generic_sht = {
	78	.module = THIS_MODULE,
	79	.name = DRV_NAME,
	80	.ioctl = ata_scsi_ioctl,
	81	.queuecommand = ata_scsi_queuecmd,
	82	.can_queue = ATA_DEF_QUEUE,
	83	.this_id = ATA_SHT_THIS_ID,
	84	.sg_tablesize = LIBATA_MAX_PRD,
669a5db4 JG	85	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	86	.emulated = ATA_SHT_EMULATED,
	87	.use_clustering = ATA_SHT_USE_CLUSTERING,
	88	.proc_name = DRV_NAME,
	89	.dma_boundary = ATA_DMA_BOUNDARY,
	90	.slave_configure = ata_scsi_slave_config,
afdfe899	91	.slave_destroy = ata_scsi_slave_destroy,
669a5db4 JG	92	.bios_param = ata_std_bios_param,
	93	};
	94
	95	static struct ata_port_operations generic_port_ops = {
	96	.set_mode = generic_set_mode,
85cd7251	97
669a5db4 JG	98	.port_disable = ata_port_disable,
	99	.tf_load = ata_tf_load,
	100	.tf_read = ata_tf_read,
	101	.check_status = ata_check_status,
	102	.exec_command = ata_exec_command,
	103	.dev_select = ata_std_dev_select,
	104
	105	.bmdma_setup = ata_bmdma_setup,
	106	.bmdma_start = ata_bmdma_start,
	107	.bmdma_stop = ata_bmdma_stop,
	108	.bmdma_status = ata_bmdma_status,
85cd7251	109
0d5ff566	110	.data_xfer = ata_data_xfer,
669a5db4 JG	111
	112	.freeze = ata_bmdma_freeze,
	113	.thaw = ata_bmdma_thaw,
eb4a2c7f	114	.error_handler = ata_bmdma_error_handler,
669a5db4	115	.post_internal_cmd = ata_bmdma_post_internal_cmd,
eb4a2c7f	116	.cable_detect = ata_cable_unknown,
669a5db4 JG	117
	118	.qc_prep = ata_qc_prep,
	119	.qc_issue = ata_qc_issue_prot,
bda30288	120
669a5db4 JG	121	.irq_handler = ata_interrupt,
669a5db4 JG	122	.irq_clear = ata_bmdma_irq_clear,
246ce3b6 AI	123	.irq_on = ata_irq_on,
246ce3b6 AI	124	.irq_ack = ata_irq_ack,
669a5db4 JG	125
669a5db4 JG	126	.port_start = ata_port_start,
85cd7251 JG	127	};
85cd7251 JG	128
669a5db4 JG	129	static int all_generic_ide; /* Set to claim all devices */
	130
	131	/**
	132	* ata_generic_init - attach generic IDE
	133	* @dev: PCI device found
	134	* @id: match entry
	135	*
	136	* Called each time a matching IDE interface is found. We check if the
85cd7251	137	* interface is one we wish to claim and if so we perform any chip
669a5db4 JG	138	* specific hacks then let the ATA layer do the heavy lifting.
669a5db4 JG	139	*/
85cd7251	140
669a5db4 JG	141	static int ata_generic_init_one(struct pci_dev dev, const struct pci_device_id id)
	142	{
	143	u16 command;
1626aeb8	144	static const struct ata_port_info info = {
669a5db4 JG	145	.sht = &generic_sht,
	146	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	147	.pio_mask = 0x1f,
	148	.mwdma_mask = 0x07,
	149	.udma_mask = 0x3f,
	150	.port_ops = &generic_port_ops
	151	};
1626aeb8	152	const struct ata_port_info *ppi[] = { &info, NULL };
85cd7251	153
669a5db4 JG	154	/* Don't use the generic entry unless instructed to do so */
	155	if (id->driver_data == 1 && all_generic_ide == 0)
	156	return -ENODEV;
	157
	158	/* Devices that need care */
	159	if (dev->vendor == PCI_VENDOR_ID_UMC &&
	160	dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
	161	(!(PCI_FUNC(dev->devfn) & 1)))
	162	return -ENODEV;
	163
	164	if (dev->vendor == PCI_VENDOR_ID_OPTI &&
	165	dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
	166	(!(PCI_FUNC(dev->devfn) & 1)))
	167	return -ENODEV;
	168
	169	/* Don't re-enable devices in generic mode or we will break some
	170	motherboards with disabled and unused IDE controllers */
	171	pci_read_config_word(dev, PCI_COMMAND, &command);
	172	if (!(command & PCI_COMMAND_IO))
	173	return -ENODEV;
85cd7251	174
669a5db4 JG	175	if (dev->vendor == PCI_VENDOR_ID_AL)
	176	ata_pci_clear_simplex(dev);
	177
1626aeb8	178	return ata_pci_init_one(dev, ppi);
669a5db4 JG	179	}
	180
	181	static struct pci_device_id ata_generic[] = {
	182	{ PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
	183	{ PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
85cd7251	184	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), },
669a5db4 JG	185	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), },
	186	{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), },
	187	{ PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), },
	188	{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), },
	189	{ PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), },
	190	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
	191	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
	192	{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
	193	/* Must come last. If you add entries adjust this table appropriately */
	194	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
	195	{ 0, },
	196	};
	197
	198	static struct pci_driver ata_generic_pci_driver = {
	199	.name = DRV_NAME,
	200	.id_table = ata_generic,
	201	.probe = ata_generic_init_one,
30ced0f0	202	.remove = ata_pci_remove_one,
438ac6d5	203	#ifdef CONFIG_PM
30ced0f0 AC	204	.suspend = ata_pci_device_suspend,
30ced0f0 AC	205	.resume = ata_pci_device_resume,
438ac6d5	206	#endif
669a5db4 JG	207	};
	208
	209	static int __init ata_generic_init(void)
	210	{
3f03c671	211	return pci_register_driver(&ata_generic_pci_driver);
669a5db4 JG	212	}
	213
	214
	215	static void __exit ata_generic_exit(void)
	216	{
	217	pci_unregister_driver(&ata_generic_pci_driver);
	218	}
	219
	220
	221	MODULE_AUTHOR("Alan Cox");
	222	MODULE_DESCRIPTION("low-level driver for generic ATA");
	223	MODULE_LICENSE("GPL");
	224	MODULE_DEVICE_TABLE(pci, ata_generic);
	225	MODULE_VERSION(DRV_VERSION);
	226
	227	module_init(ata_generic_init);
	228	module_exit(ata_generic_exit);
	229
	230	module_param(all_generic_ide, int, 0);