[mirror_ubuntu-artful-kernel.git] / drivers / ata / pata_ns87410.c

/*
 * pata_ns87410.c 	- National Semiconductor 87410 PATA for new ATA layer
 *			  (C) 2006 Red Hat Inc
 *			  Alan Cox <alan@redhat.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#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_ns87410"
#define DRV_VERSION "0.4.6"

/**
 *	ns87410_pre_reset		-	probe begin
 *	@ap: ATA port
 *
 *	Check enabled ports
 */

static int ns87410_pre_reset(struct ata_port *ap)
{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	static const struct pci_bits ns87410_enable_bits[] = {
		{ 0x43, 1, 0x08, 0x08 },
		{ 0x47, 1, 0x08, 0x08 }
	};

	if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
		return -ENOENT;
	return ata_std_prereset(ap);
}

/**
 *	ns87410_error_handler		-	probe reset
 *	@ap: ATA port
 *
 *	Perform the ATA probe and bus reset sequence plus specific handling
 *	for this hardware. The MPIIX has the enable bits in a different place
 *	to PIIX4 and friends. As a pure PIO device it has no cable detect
 */

static void ns87410_error_handler(struct ata_port *ap)
{
	ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
}

/**
 *	ns87410_set_piomode	-	set initial PIO mode data
 *	@ap: ATA interface
 *	@adev: ATA device
 *
 *	Program timing data. This is kept per channel not per device,
 *	and only affects the data port.
 */

static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	int port = 0x40 + 4 * ap->port_no;
	u8 idetcr, idefr;
	struct ata_timing at;

	static const u8 activebits[15] = {
		0, 1, 2, 3, 4,
		5, 5, 6, 6, 6,
		6, 7, 7, 7, 7
	};

	static const u8 recoverbits[12] = {
		0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
	};

	pci_read_config_byte(pdev, port + 3, &idefr);

	if (ata_pio_need_iordy(adev))
		idefr |= 0x04;	/* IORDY enable */
	else
		idefr &= ~0x04;

	if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
		dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
		return;
	}

	at.active = FIT(at.active, 2, 16) - 2;
	at.setup = FIT(at.setup, 1, 4) - 1;
	at.recover = FIT(at.recover, 1, 12) - 1;

	idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];

	pci_write_config_byte(pdev, port, idetcr);
	pci_write_config_byte(pdev, port + 3, idefr);
	/* We use ap->private_data as a pointer to the device currently
	   loaded for timing */
	ap->private_data = adev;
}

/**
 *	ns87410_qc_issue_prot	-	command issue
 *	@qc: command pending
 *
 *	Called when the libata layer is about to issue a command. We wrap
 *	this interface so that we can load the correct ATA timings if
 *	neccessary.
 */

static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc)
{
	struct ata_port *ap = qc->ap;
	struct ata_device *adev = qc->dev;

	/* If modes have been configured and the channel data is not loaded
	   then load it. We have to check if pio_mode is set as the core code
	   does not set adev->pio_mode to XFER_PIO_0 while probing as would be
	   logical */

	if (adev->pio_mode && adev != ap->private_data)
		ns87410_set_piomode(ap, adev);

	return ata_qc_issue_prot(qc);
}

static struct scsi_host_template ns87410_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,
#ifdef CONFIG_PM
	.resume			= ata_scsi_device_resume,
	.suspend		= ata_scsi_device_suspend,
#endif
};

static struct ata_port_operations ns87410_port_ops = {
	.port_disable	= ata_port_disable,
	.set_piomode	= ns87410_set_piomode,

	.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,

	.freeze		= ata_bmdma_freeze,
	.thaw		= ata_bmdma_thaw,
	.error_handler	= ns87410_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	.cable_detect	= ata_cable_40wire,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ns87410_qc_issue_prot,

	.data_xfer	= ata_data_xfer,

	.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 ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	static struct ata_port_info info = {
		.sht = &ns87410_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
		.pio_mask = 0x0F,
		.port_ops = &ns87410_port_ops
	};
	static struct ata_port_info *port_info[2] = {&info, &info};
	return ata_pci_init_one(dev, port_info, 2);
}

static const struct pci_device_id ns87410[] = {
	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },

	{ },
};

static struct pci_driver ns87410_pci_driver = {
	.name 		= DRV_NAME,
	.id_table	= ns87410,
	.probe 		= ns87410_init_one,
	.remove		= ata_pci_remove_one,
#ifdef CONFIG_PM
	.suspend	= ata_pci_device_suspend,
	.resume		= ata_pci_device_resume,
#endif
};

static int __init ns87410_init(void)
{
	return pci_register_driver(&ns87410_pci_driver);
}

static void __exit ns87410_exit(void)
{
	pci_unregister_driver(&ns87410_pci_driver);
}

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, ns87410);
MODULE_VERSION(DRV_VERSION);

module_init(ns87410_init);
module_exit(ns87410_exit);
Commit	Line	Data
669a5db4 JG	1	/*
	2	* pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
	3	* (C) 2006 Red Hat Inc
	4	* Alan Cox <alan@redhat.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2, or (at your option)
	9	* any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; see the file COPYING. If not, write to
	18	* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/pci.h>
	24	#include <linux/init.h>
	25	#include <linux/blkdev.h>
	26	#include <linux/delay.h>
	27	#include <scsi/scsi_host.h>
	28	#include <linux/libata.h>
	29
	30	#define DRV_NAME "pata_ns87410"
a0fcdc02	31	#define DRV_VERSION "0.4.6"
669a5db4 JG	32
	33	/**
	34	* ns87410_pre_reset - probe begin
	35	* @ap: ATA port
	36	*
a0fcdc02	37	* Check enabled ports
669a5db4 JG	38	*/
	39
	40	static int ns87410_pre_reset(struct ata_port *ap)
	41	{
	42	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	43	static const struct pci_bits ns87410_enable_bits[] = {
	44	{ 0x43, 1, 0x08, 0x08 },
	45	{ 0x47, 1, 0x08, 0x08 }
	46	};
	47
c961922b AC	48	if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
c961922b AC	49	return -ENOENT;
669a5db4 JG	50	return ata_std_prereset(ap);
	51	}
	52
	53	/**
	54	* ns87410_error_handler - probe reset
	55	* @ap: ATA port
	56	*
	57	* Perform the ATA probe and bus reset sequence plus specific handling
	58	* for this hardware. The MPIIX has the enable bits in a different place
	59	* to PIIX4 and friends. As a pure PIO device it has no cable detect
	60	*/
	61
	62	static void ns87410_error_handler(struct ata_port *ap)
	63	{
	64	ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
	65	}
	66
	67	/**
	68	* ns87410_set_piomode - set initial PIO mode data
	69	* @ap: ATA interface
	70	* @adev: ATA device
	71	*
	72	* Program timing data. This is kept per channel not per device,
	73	* and only affects the data port.
	74	*/
	75
	76	static void ns87410_set_piomode(struct ata_port ap, struct ata_device adev)
	77	{
	78	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	79	int port = 0x40 + 4 * ap->port_no;
	80	u8 idetcr, idefr;
	81	struct ata_timing at;
	82
	83	static const u8 activebits[15] = {
	84	0, 1, 2, 3, 4,
	85	5, 5, 6, 6, 6,
	86	6, 7, 7, 7, 7
	87	};
	88
	89	static const u8 recoverbits[12] = {
	90	0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
	91	};
	92
	93	pci_read_config_byte(pdev, port + 3, &idefr);
	94
	95	if (ata_pio_need_iordy(adev))
	96	idefr \|= 0x04; /* IORDY enable */
	97	else
	98	idefr &= ~0x04;
	99
	100	if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
	101	dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
	102	return;
	103	}
	104
	105	at.active = FIT(at.active, 2, 16) - 2;
	106	at.setup = FIT(at.setup, 1, 4) - 1;
	107	at.recover = FIT(at.recover, 1, 12) - 1;
	108
	109	idetcr = (at.setup << 6) \| (recoverbits[at.recover] << 3) \| activebits[at.active];
	110
	111	pci_write_config_byte(pdev, port, idetcr);
	112	pci_write_config_byte(pdev, port + 3, idefr);
	113	/* We use ap->private_data as a pointer to the device currently
114	loaded for timing */
115	ap->private_data = adev;
116	}
117
118	/**
119	* ns87410_qc_issue_prot - command issue
120	* @qc: command pending
121	*
122	* Called when the libata layer is about to issue a command. We wrap
123	* this interface so that we can load the correct ATA timings if
124	* neccessary.
125	*/
126
127	static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc)
128	{
129	struct ata_port *ap = qc->ap;
130	struct ata_device *adev = qc->dev;
131
132	/* If modes have been configured and the channel data is not loaded
133	then load it. We have to check if pio_mode is set as the core code
134	does not set adev->pio_mode to XFER_PIO_0 while probing as would be
135	logical */
136
137	if (adev->pio_mode && adev != ap->private_data)
138	ns87410_set_piomode(ap, adev);
139
140	return ata_qc_issue_prot(qc);
141	}
142
143	static struct scsi_host_template ns87410_sht = {
144	.module = THIS_MODULE,
145	.name = DRV_NAME,
146	.ioctl = ata_scsi_ioctl,
147	.queuecommand = ata_scsi_queuecmd,
148	.can_queue = ATA_DEF_QUEUE,
149	.this_id = ATA_SHT_THIS_ID,
150	.sg_tablesize = LIBATA_MAX_PRD,
669a5db4 JG	151	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	152	.emulated = ATA_SHT_EMULATED,
	153	.use_clustering = ATA_SHT_USE_CLUSTERING,
	154	.proc_name = DRV_NAME,
	155	.dma_boundary = ATA_DMA_BOUNDARY,
	156	.slave_configure = ata_scsi_slave_config,
afdfe899	157	.slave_destroy = ata_scsi_slave_destroy,
669a5db4	158	.bios_param = ata_std_bios_param,
438ac6d5	159	#ifdef CONFIG_PM
30ced0f0 AC	160	.resume = ata_scsi_device_resume,
30ced0f0 AC	161	.suspend = ata_scsi_device_suspend,
438ac6d5	162	#endif
669a5db4 JG	163	};
	164
	165	static struct ata_port_operations ns87410_port_ops = {
	166	.port_disable = ata_port_disable,
	167	.set_piomode = ns87410_set_piomode,
	168
	169	.tf_load = ata_tf_load,
	170	.tf_read = ata_tf_read,
	171	.check_status = ata_check_status,
	172	.exec_command = ata_exec_command,
	173	.dev_select = ata_std_dev_select,
	174
	175	.freeze = ata_bmdma_freeze,
	176	.thaw = ata_bmdma_thaw,
	177	.error_handler = ns87410_error_handler,
	178	.post_internal_cmd = ata_bmdma_post_internal_cmd,
a0fcdc02	179	.cable_detect = ata_cable_40wire,
669a5db4 JG	180
	181	.qc_prep = ata_qc_prep,
	182	.qc_issue = ns87410_qc_issue_prot,
bda30288	183
0d5ff566	184	.data_xfer = ata_data_xfer,
669a5db4 JG	185
	186	.irq_handler = ata_interrupt,
	187	.irq_clear = ata_bmdma_irq_clear,
246ce3b6 AI	188	.irq_on = ata_irq_on,
246ce3b6 AI	189	.irq_ack = ata_irq_ack,
669a5db4 JG	190
669a5db4 JG	191	.port_start = ata_port_start,
669a5db4 JG	192	};
	193
	194	static int ns87410_init_one(struct pci_dev dev, const struct pci_device_id id)
	195	{
	196	static struct ata_port_info info = {
	197	.sht = &ns87410_sht,
	198	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	199	.pio_mask = 0x0F,
	200	.port_ops = &ns87410_port_ops
	201	};
	202	static struct ata_port_info *port_info[2] = {&info, &info};
	203	return ata_pci_init_one(dev, port_info, 2);
	204	}
	205
	206	static const struct pci_device_id ns87410[] = {
2d2744fc JG	207	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
	208
	209	{ },
669a5db4 JG	210	};
	211
	212	static struct pci_driver ns87410_pci_driver = {
2d2744fc	213	.name = DRV_NAME,
669a5db4 JG	214	.id_table = ns87410,
669a5db4 JG	215	.probe = ns87410_init_one,
30ced0f0	216	.remove = ata_pci_remove_one,
438ac6d5	217	#ifdef CONFIG_PM
30ced0f0 AC	218	.suspend = ata_pci_device_suspend,
30ced0f0 AC	219	.resume = ata_pci_device_resume,
438ac6d5	220	#endif
669a5db4 JG	221	};
	222
	223	static int __init ns87410_init(void)
	224	{
	225	return pci_register_driver(&ns87410_pci_driver);
	226	}
	227
669a5db4 JG	228	static void __exit ns87410_exit(void)
	229	{
	230	pci_unregister_driver(&ns87410_pci_driver);
	231	}
	232
669a5db4 JG	233	MODULE_AUTHOR("Alan Cox");
	234	MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
	235	MODULE_LICENSE("GPL");
	236	MODULE_DEVICE_TABLE(pci, ns87410);
	237	MODULE_VERSION(DRV_VERSION);
	238
	239	module_init(ns87410_init);
	240	module_exit(ns87410_exit);