[linux.git] / drivers / ata / pata_triflex.c

/*
 * pata_triflex.c 	- Compaq PATA for new ATA layer
 *			  (C) 2005 Red Hat Inc
 *			  Alan Cox <[email protected]>
 *
 * based upon
 *
 * triflex.c
 *
 * IDE Chipset driver for the Compaq TriFlex IDE controller.
 *
 * Known to work with the Compaq Workstation 5x00 series.
 *
 * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
 * Author: Torben Mathiasen <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Loosely based on the piix & svwks drivers.
 *
 * Documentation:
 *	Not publicly available.
 */

#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_triflex"
#define DRV_VERSION "0.2.8"

/**
 *	triflex_prereset		-	probe begin
 *	@link: ATA link
 *	@deadline: deadline jiffies for the operation
 *
 *	Set up cable type and use generic probe init
 */

static int triflex_prereset(struct ata_link *link, unsigned long deadline)
{
	static const struct pci_bits triflex_enable_bits[] = {
		{ 0x80, 1, 0x01, 0x01 },
		{ 0x80, 1, 0x02, 0x02 }
	};

	struct ata_port *ap = link->ap;
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);

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

	return ata_sff_prereset(link, deadline);
}


/**
 *	triflex_load_timing		-	timing configuration
 *	@ap: ATA interface
 *	@adev: Device on the bus
 *	@speed: speed to configure
 *
 *	The Triflex has one set of timings per device per channel. This
 *	means we must do some switching. As the PIO and DMA timings don't
 *	match we have to do some reloading unlike PIIX devices where tuning
 *	tricks can avoid it.
 */

static void triflex_load_timing(struct ata_port *ap, struct ata_device *adev, int speed)
{
	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	u32 timing = 0;
	u32 triflex_timing, old_triflex_timing;
	int channel_offset = ap->port_no ? 0x74: 0x70;
	unsigned int is_slave	= (adev->devno != 0);


	pci_read_config_dword(pdev, channel_offset, &old_triflex_timing);
	triflex_timing = old_triflex_timing;

	switch(speed)
	{
		case XFER_MW_DMA_2:
			timing = 0x0103;break;
		case XFER_MW_DMA_1:
			timing = 0x0203;break;
		case XFER_MW_DMA_0:
			timing = 0x0808;break;
		case XFER_SW_DMA_2:
		case XFER_SW_DMA_1:
		case XFER_SW_DMA_0:
			timing = 0x0F0F;break;
		case XFER_PIO_4:
			timing = 0x0202;break;
		case XFER_PIO_3:
			timing = 0x0204;break;
		case XFER_PIO_2:
			timing = 0x0404;break;
		case XFER_PIO_1:
			timing = 0x0508;break;
		case XFER_PIO_0:
			timing = 0x0808;break;
		default:
			BUG();
	}
	triflex_timing &= ~ (0xFFFF << (16 * is_slave));
	triflex_timing |= (timing << (16 * is_slave));

	if (triflex_timing != old_triflex_timing)
		pci_write_config_dword(pdev, channel_offset, triflex_timing);
}

/**
 *	triflex_set_piomode	-	set initial PIO mode data
 *	@ap: ATA interface
 *	@adev: ATA device
 *
 *	Use the timing loader to set up the PIO mode. We have to do this
 *	because DMA start/stop will only be called once DMA occurs. If there
 *	has been no DMA then the PIO timings are still needed.
 */
static void triflex_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
	triflex_load_timing(ap, adev, adev->pio_mode);
}

/**
 *	triflex_dma_start	-	DMA start callback
 *	@qc: Command in progress
 *
 *	Usually drivers set the DMA timing at the point the set_dmamode call
 *	is made. Triflex however requires we load new timings on the
 *	transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc).
 *	We load the DMA timings just before starting DMA and then restore
 *	the PIO timing when the DMA is finished.
 */

static void triflex_bmdma_start(struct ata_queued_cmd *qc)
{
	triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode);
	ata_bmdma_start(qc);
}

/**
 *	triflex_dma_stop	-	DMA stop callback
 *	@ap: ATA interface
 *	@adev: ATA device
 *
 *	We loaded new timings in dma_start, as a result we need to restore
 *	the PIO timings in dma_stop so that the next command issue gets the
 *	right clock values.
 */

static void triflex_bmdma_stop(struct ata_queued_cmd *qc)
{
	ata_bmdma_stop(qc);
	triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode);
}

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

static struct ata_port_operations triflex_port_ops = {
	.inherits	= &ata_bmdma_port_ops,
	.bmdma_start 	= triflex_bmdma_start,
	.bmdma_stop	= triflex_bmdma_stop,
	.cable_detect	= ata_cable_40wire,
	.set_piomode	= triflex_set_piomode,
	.prereset	= triflex_prereset,
};

static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	static const struct ata_port_info info = {
		.flags = ATA_FLAG_SLAVE_POSS,
		.pio_mask = ATA_PIO4,
		.mwdma_mask = ATA_MWDMA2,
		.port_ops = &triflex_port_ops
	};
	const struct ata_port_info *ppi[] = { &info, NULL };
	static int printed_version;

	if (!printed_version++)
		dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");

	return ata_pci_bmdma_init_one(dev, ppi, &triflex_sht, NULL, 0);
}

static const struct pci_device_id triflex[] = {
	{ PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), },

	{ },
};

#ifdef CONFIG_PM
static int triflex_ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
	struct ata_host *host = dev_get_drvdata(&pdev->dev);
	int rc = 0;

	rc = ata_host_suspend(host, mesg);
	if (rc)
		return rc;

	/*
	 * We must not disable or powerdown the device.
	 * APM bios refuses to suspend if IDE is not accessible.
	 */
	pci_save_state(pdev);

	return 0;
}

#endif

static struct pci_driver triflex_pci_driver = {
	.name 		= DRV_NAME,
	.id_table	= triflex,
	.probe 		= triflex_init_one,
	.remove		= ata_pci_remove_one,
#ifdef CONFIG_PM
	.suspend	= triflex_ata_pci_device_suspend,
	.resume		= ata_pci_device_resume,
#endif
};

static int __init triflex_init(void)
{
	return pci_register_driver(&triflex_pci_driver);
}

static void __exit triflex_exit(void)
{
	pci_unregister_driver(&triflex_pci_driver);
}

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for Compaq Triflex");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, triflex);
MODULE_VERSION(DRV_VERSION);

module_init(triflex_init);
module_exit(triflex_exit);
Commit	Line	Data
669a5db4 JG	1	/*
	2	* pata_triflex.c - Compaq PATA for new ATA layer
	3	* (C) 2005 Red Hat Inc
ab771630	4	* Alan Cox <[email protected]>
669a5db4 JG	5	*
	6	* based upon
	7	*
	8	* triflex.c
	9	*
	10	* IDE Chipset driver for the Compaq TriFlex IDE controller.
	11	*
	12	* Known to work with the Compaq Workstation 5x00 series.
	13	*
	14	* Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
	15	* Author: Torben Mathiasen <[email protected]>
	16	*
	17	* This program is free software; you can redistribute it and/or modify
	18	* it under the terms of the GNU General Public License version 2 as
	19	* published by the Free Software Foundation.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, write to the Free Software
	28	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	29	*
	30	* Loosely based on the piix & svwks drivers.
	31	*
	32	* Documentation:
25985edc	33	* Not publicly available.
669a5db4 JG	34	*/
	35
	36	#include <linux/kernel.h>
	37	#include <linux/module.h>
	38	#include <linux/pci.h>
	39	#include <linux/init.h>
	40	#include <linux/blkdev.h>
	41	#include <linux/delay.h>
	42	#include <scsi/scsi_host.h>
	43	#include <linux/libata.h>
	44
	45	#define DRV_NAME "pata_triflex"
a0fcdc02	46	#define DRV_VERSION "0.2.8"
669a5db4 JG	47
669a5db4 JG	48	/**
c961922b	49	* triflex_prereset - probe begin
cc0680a5	50	* @link: ATA link
d4b2bab4	51	* @deadline: deadline jiffies for the operation
669a5db4 JG	52	*
	53	* Set up cable type and use generic probe init
	54	*/
	55
cc0680a5	56	static int triflex_prereset(struct ata_link *link, unsigned long deadline)
669a5db4 JG	57	{
	58	static const struct pci_bits triflex_enable_bits[] = {
	59	{ 0x80, 1, 0x01, 0x01 },
	60	{ 0x80, 1, 0x02, 0x02 }
	61	};
	62
cc0680a5	63	struct ata_port *ap = link->ap;
669a5db4	64	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
85cd7251	65
c961922b AC	66	if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no]))
c961922b AC	67	return -ENOENT;
d4b2bab4	68
9363c382	69	return ata_sff_prereset(link, deadline);
669a5db4 JG	70	}
	71
	72
	73
669a5db4 JG	74	/**
	75	* triflex_load_timing - timing configuration
	76	* @ap: ATA interface
	77	* @adev: Device on the bus
	78	* @speed: speed to configure
	79	*
	80	* The Triflex has one set of timings per device per channel. This
	81	* means we must do some switching. As the PIO and DMA timings don't
	82	* match we have to do some reloading unlike PIIX devices where tuning
	83	* tricks can avoid it.
	84	*/
	85
	86	static void triflex_load_timing(struct ata_port ap, struct ata_device adev, int speed)
	87	{
	88	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	89	u32 timing = 0;
	90	u32 triflex_timing, old_triflex_timing;
	91	int channel_offset = ap->port_no ? 0x74: 0x70;
	92	unsigned int is_slave = (adev->devno != 0);
	93
	94
	95	pci_read_config_dword(pdev, channel_offset, &old_triflex_timing);
	96	triflex_timing = old_triflex_timing;
	97
	98	switch(speed)
	99	{
	100	case XFER_MW_DMA_2:
	101	timing = 0x0103;break;
	102	case XFER_MW_DMA_1:
	103	timing = 0x0203;break;
	104	case XFER_MW_DMA_0:
	105	timing = 0x0808;break;
	106	case XFER_SW_DMA_2:
	107	case XFER_SW_DMA_1:
	108	case XFER_SW_DMA_0:
	109	timing = 0x0F0F;break;
	110	case XFER_PIO_4:
	111	timing = 0x0202;break;
	112	case XFER_PIO_3:
	113	timing = 0x0204;break;
	114	case XFER_PIO_2:
	115	timing = 0x0404;break;
	116	case XFER_PIO_1:
	117	timing = 0x0508;break;
	118	case XFER_PIO_0:
	119	timing = 0x0808;break;
	120	default:
	121	BUG();
	122	}
	123	triflex_timing &= ~ (0xFFFF << (16 * is_slave));
	124	triflex_timing \|= (timing << (16 * is_slave));
	125
	126	if (triflex_timing != old_triflex_timing)
	127	pci_write_config_dword(pdev, channel_offset, triflex_timing);
	128	}
	129
	130	/**
	131	* triflex_set_piomode - set initial PIO mode data
	132	* @ap: ATA interface
	133	* @adev: ATA device
	134	*
	135	* Use the timing loader to set up the PIO mode. We have to do this
	136	* because DMA start/stop will only be called once DMA occurs. If there
	137	* has been no DMA then the PIO timings are still needed.
138	*/
139	static void triflex_set_piomode(struct ata_port ap, struct ata_device adev)
140	{
141	triflex_load_timing(ap, adev, adev->pio_mode);
142	}
143
144	/**
145	* triflex_dma_start - DMA start callback
146	* @qc: Command in progress
147	*
148	* Usually drivers set the DMA timing at the point the set_dmamode call
149	* is made. Triflex however requires we load new timings on the
150	* transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc).
151	* We load the DMA timings just before starting DMA and then restore
152	* the PIO timing when the DMA is finished.
153	*/
154
155	static void triflex_bmdma_start(struct ata_queued_cmd *qc)
156	{
157	triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode);
158	ata_bmdma_start(qc);
159	}
160
161	/**
162	* triflex_dma_stop - DMA stop callback
163	* @ap: ATA interface
164	* @adev: ATA device
165	*
166	* We loaded new timings in dma_start, as a result we need to restore
167	* the PIO timings in dma_stop so that the next command issue gets the
168	* right clock values.
169	*/
170
171	static void triflex_bmdma_stop(struct ata_queued_cmd *qc)
172	{
173	ata_bmdma_stop(qc);
174	triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode);
175	}
176
177	static struct scsi_host_template triflex_sht = {
68d1d07b	178	ATA_BMDMA_SHT(DRV_NAME),
669a5db4 JG	179	};
	180
	181	static struct ata_port_operations triflex_port_ops = {
029cfd6b	182	.inherits = &ata_bmdma_port_ops,
669a5db4 JG	183	.bmdma_start = triflex_bmdma_start,
669a5db4 JG	184	.bmdma_stop = triflex_bmdma_stop,
029cfd6b TH	185	.cable_detect = ata_cable_40wire,
029cfd6b TH	186	.set_piomode = triflex_set_piomode,
a1efdaba	187	.prereset = triflex_prereset,
669a5db4 JG	188	};
	189
	190	static int triflex_init_one(struct pci_dev dev, const struct pci_device_id id)
	191	{
1626aeb8	192	static const struct ata_port_info info = {
1d2808fd	193	.flags = ATA_FLAG_SLAVE_POSS,
14bdef98 EIB	194	.pio_mask = ATA_PIO4,
14bdef98 EIB	195	.mwdma_mask = ATA_MWDMA2,
669a5db4 JG	196	.port_ops = &triflex_port_ops
669a5db4 JG	197	};
1626aeb8	198	const struct ata_port_info *ppi[] = { &info, NULL };
669a5db4 JG	199	static int printed_version;
	200
	201	if (!printed_version++)
	202	dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
	203
1c5afdf7	204	return ata_pci_bmdma_init_one(dev, ppi, &triflex_sht, NULL, 0);
669a5db4 JG	205	}
	206
	207	static const struct pci_device_id triflex[] = {
2d2744fc JG	208	{ PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), },
	209
	210	{ },
669a5db4 JG	211	};
669a5db4 JG	212
bfeec8ca MP	213	#ifdef CONFIG_PM
	214	static int triflex_ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
	215	{
	216	struct ata_host *host = dev_get_drvdata(&pdev->dev);
	217	int rc = 0;
	218
	219	rc = ata_host_suspend(host, mesg);
	220	if (rc)
	221	return rc;
	222
	223	/*
	224	* We must not disable or powerdown the device.
	225	* APM bios refuses to suspend if IDE is not accessible.
	226	*/
	227	pci_save_state(pdev);
	228
	229	return 0;
	230	}
	231
	232	#endif
	233
669a5db4	234	static struct pci_driver triflex_pci_driver = {
2d2744fc	235	.name = DRV_NAME,
669a5db4 JG	236	.id_table = triflex,
669a5db4 JG	237	.probe = triflex_init_one,
30ced0f0	238	.remove = ata_pci_remove_one,
438ac6d5	239	#ifdef CONFIG_PM
bfeec8ca	240	.suspend = triflex_ata_pci_device_suspend,
30ced0f0	241	.resume = ata_pci_device_resume,
438ac6d5	242	#endif
669a5db4 JG	243	};
	244
	245	static int __init triflex_init(void)
	246	{
	247	return pci_register_driver(&triflex_pci_driver);
	248	}
	249
669a5db4 JG	250	static void __exit triflex_exit(void)
	251	{
	252	pci_unregister_driver(&triflex_pci_driver);
	253	}
	254
669a5db4 JG	255	MODULE_AUTHOR("Alan Cox");
	256	MODULE_DESCRIPTION("low-level driver for Compaq Triflex");
	257	MODULE_LICENSE("GPL");
	258	MODULE_DEVICE_TABLE(pci, triflex);
	259	MODULE_VERSION(DRV_VERSION);
	260
	261	module_init(triflex_init);
	262	module_exit(triflex_exit);