[linux-2.6-block.git] / drivers / ata / pata_triflex.c

/*
 * pata_triflex.c 	- Compaq PATA for new ATA layer
 *			  (C) 2005 Red Hat Inc
 *			  Alan Cox <alan@redhat.com>
 *
 * 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 <torben.mathiasen@hp.com>
 *
 * 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 publically 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
 *	@ap: ATA port
 *
 *	Set up cable type and use generic probe init
 */

static int triflex_prereset(struct ata_port *ap)
{
	static const struct pci_bits triflex_enable_bits[] = {
		{ 0x80, 1, 0x01, 0x01 },
		{ 0x80, 1, 0x02, 0x02 }
	};

	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_std_prereset(ap);
}


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

/**
 *	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 = {
	.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 triflex_port_ops = {
	.port_disable	= ata_port_disable,
	.set_piomode	= triflex_set_piomode,
	.mode_filter	= ata_pci_default_filter,

	.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	= triflex_error_handler,
	.post_internal_cmd = ata_bmdma_post_internal_cmd,
	.cable_detect	= ata_cable_40wire,

	.bmdma_setup 	= ata_bmdma_setup,
	.bmdma_start 	= triflex_bmdma_start,
	.bmdma_stop	= triflex_bmdma_stop,
	.bmdma_status 	= ata_bmdma_status,

	.qc_prep 	= ata_qc_prep,
	.qc_issue	= ata_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 triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	static struct ata_port_info info = {
		.sht = &triflex_sht,
		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
		.pio_mask = 0x1f,
		.mwdma_mask = 0x07,
		.port_ops = &triflex_port_ops
	};
	static struct ata_port_info *port_info[2] = { &info, &info };
	static int printed_version;

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

	return ata_pci_init_one(dev, port_info, 2);
}

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

	{ },
};

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	= 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
	4	* Alan Cox <alan@redhat.com>
	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 <torben.mathiasen@hp.com>
	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:
	33	* Not publically available.
	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
669a5db4 JG	50	* @ap: ATA port
	51	*
	52	* Set up cable type and use generic probe init
	53	*/
	54
c961922b	55	static int triflex_prereset(struct ata_port *ap)
669a5db4 JG	56	{
	57	static const struct pci_bits triflex_enable_bits[] = {
	58	{ 0x80, 1, 0x01, 0x01 },
	59	{ 0x80, 1, 0x02, 0x02 }
	60	};
	61
	62	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
85cd7251	63
c961922b AC	64	if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no]))
c961922b AC	65	return -ENOENT;
669a5db4 JG	66	return ata_std_prereset(ap);
	67	}
	68
	69
	70
	71	static void triflex_error_handler(struct ata_port *ap)
	72	{
c961922b	73	ata_bmdma_drive_eh(ap, triflex_prereset, ata_std_softreset, NULL, ata_std_postreset);
669a5db4 JG	74	}
	75
	76	/**
	77	* triflex_load_timing - timing configuration
	78	* @ap: ATA interface
	79	* @adev: Device on the bus
	80	* @speed: speed to configure
	81	*
	82	* The Triflex has one set of timings per device per channel. This
	83	* means we must do some switching. As the PIO and DMA timings don't
	84	* match we have to do some reloading unlike PIIX devices where tuning
	85	* tricks can avoid it.
	86	*/
	87
	88	static void triflex_load_timing(struct ata_port ap, struct ata_device adev, int speed)
	89	{
	90	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
	91	u32 timing = 0;
	92	u32 triflex_timing, old_triflex_timing;
	93	int channel_offset = ap->port_no ? 0x74: 0x70;
	94	unsigned int is_slave = (adev->devno != 0);
	95
	96
	97	pci_read_config_dword(pdev, channel_offset, &old_triflex_timing);
	98	triflex_timing = old_triflex_timing;
	99
	100	switch(speed)
	101	{
	102	case XFER_MW_DMA_2:
	103	timing = 0x0103;break;
	104	case XFER_MW_DMA_1:
	105	timing = 0x0203;break;
	106	case XFER_MW_DMA_0:
	107	timing = 0x0808;break;
	108	case XFER_SW_DMA_2:
	109	case XFER_SW_DMA_1:
	110	case XFER_SW_DMA_0:
	111	timing = 0x0F0F;break;
	112	case XFER_PIO_4:
	113	timing = 0x0202;break;
	114	case XFER_PIO_3:
	115	timing = 0x0204;break;
	116	case XFER_PIO_2:
	117	timing = 0x0404;break;
	118	case XFER_PIO_1:
	119	timing = 0x0508;break;
	120	case XFER_PIO_0:
	121	timing = 0x0808;break;
	122	default:
	123	BUG();
	124	}
	125	triflex_timing &= ~ (0xFFFF << (16 * is_slave));
	126	triflex_timing \|= (timing << (16 * is_slave));
	127
	128	if (triflex_timing != old_triflex_timing)
	129	pci_write_config_dword(pdev, channel_offset, triflex_timing);
	130	}
	131
	132	/**
	133	* triflex_set_piomode - set initial PIO mode data
	134	* @ap: ATA interface
	135	* @adev: ATA device
	136	*
	137	* Use the timing loader to set up the PIO mode. We have to do this
138	* because DMA start/stop will only be called once DMA occurs. If there
139	* has been no DMA then the PIO timings are still needed.
140	*/
141	static void triflex_set_piomode(struct ata_port ap, struct ata_device adev)
142	{
143	triflex_load_timing(ap, adev, adev->pio_mode);
144	}
145
146	/**
147	* triflex_dma_start - DMA start callback
148	* @qc: Command in progress
149	*
150	* Usually drivers set the DMA timing at the point the set_dmamode call
151	* is made. Triflex however requires we load new timings on the
152	* transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc).
153	* We load the DMA timings just before starting DMA and then restore
154	* the PIO timing when the DMA is finished.
155	*/
156
157	static void triflex_bmdma_start(struct ata_queued_cmd *qc)
158	{
159	triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode);
160	ata_bmdma_start(qc);
161	}
162
163	/**
164	* triflex_dma_stop - DMA stop callback
165	* @ap: ATA interface
166	* @adev: ATA device
167	*
168	* We loaded new timings in dma_start, as a result we need to restore
169	* the PIO timings in dma_stop so that the next command issue gets the
170	* right clock values.
171	*/
172
173	static void triflex_bmdma_stop(struct ata_queued_cmd *qc)
174	{
175	ata_bmdma_stop(qc);
176	triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode);
177	}
178
179	static struct scsi_host_template triflex_sht = {
180	.module = THIS_MODULE,
181	.name = DRV_NAME,
182	.ioctl = ata_scsi_ioctl,
183	.queuecommand = ata_scsi_queuecmd,
184	.can_queue = ATA_DEF_QUEUE,
185	.this_id = ATA_SHT_THIS_ID,
186	.sg_tablesize = LIBATA_MAX_PRD,
669a5db4 JG	187	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	188	.emulated = ATA_SHT_EMULATED,
	189	.use_clustering = ATA_SHT_USE_CLUSTERING,
	190	.proc_name = DRV_NAME,
	191	.dma_boundary = ATA_DMA_BOUNDARY,
	192	.slave_configure = ata_scsi_slave_config,
afdfe899	193	.slave_destroy = ata_scsi_slave_destroy,
669a5db4	194	.bios_param = ata_std_bios_param,
438ac6d5	195	#ifdef CONFIG_PM
30ced0f0 A	196	.resume = ata_scsi_device_resume,
30ced0f0 A	197	.suspend = ata_scsi_device_suspend,
438ac6d5	198	#endif
669a5db4 JG	199	};
	200
	201	static struct ata_port_operations triflex_port_ops = {
	202	.port_disable = ata_port_disable,
	203	.set_piomode = triflex_set_piomode,
	204	.mode_filter = ata_pci_default_filter,
	205
	206	.tf_load = ata_tf_load,
	207	.tf_read = ata_tf_read,
	208	.check_status = ata_check_status,
	209	.exec_command = ata_exec_command,
	210	.dev_select = ata_std_dev_select,
	211
	212	.freeze = ata_bmdma_freeze,
	213	.thaw = ata_bmdma_thaw,
	214	.error_handler = triflex_error_handler,
	215	.post_internal_cmd = ata_bmdma_post_internal_cmd,
a0fcdc02	216	.cable_detect = ata_cable_40wire,
669a5db4 JG	217
	218	.bmdma_setup = ata_bmdma_setup,
	219	.bmdma_start = triflex_bmdma_start,
	220	.bmdma_stop = triflex_bmdma_stop,
	221	.bmdma_status = ata_bmdma_status,
	222
	223	.qc_prep = ata_qc_prep,
	224	.qc_issue = ata_qc_issue_prot,
bda30288	225
0d5ff566	226	.data_xfer = ata_data_xfer,
669a5db4 JG	227
	228	.irq_handler = ata_interrupt,
	229	.irq_clear = ata_bmdma_irq_clear,
246ce3b6 AI	230	.irq_on = ata_irq_on,
246ce3b6 AI	231	.irq_ack = ata_irq_ack,
669a5db4 JG	232
669a5db4 JG	233	.port_start = ata_port_start,
669a5db4 JG	234	};
	235
	236	static int triflex_init_one(struct pci_dev dev, const struct pci_device_id id)
	237	{
	238	static struct ata_port_info info = {
	239	.sht = &triflex_sht,
	240	.flags = ATA_FLAG_SLAVE_POSS \| ATA_FLAG_SRST,
	241	.pio_mask = 0x1f,
	242	.mwdma_mask = 0x07,
	243	.port_ops = &triflex_port_ops
	244	};
	245	static struct ata_port_info *port_info[2] = { &info, &info };
	246	static int printed_version;
	247
	248	if (!printed_version++)
	249	dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
	250
	251	return ata_pci_init_one(dev, port_info, 2);
	252	}
	253
	254	static const struct pci_device_id triflex[] = {
2d2744fc JG	255	{ PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), },
	256
	257	{ },
669a5db4 JG	258	};
	259
	260	static struct pci_driver triflex_pci_driver = {
2d2744fc	261	.name = DRV_NAME,
669a5db4 JG	262	.id_table = triflex,
669a5db4 JG	263	.probe = triflex_init_one,
30ced0f0	264	.remove = ata_pci_remove_one,
438ac6d5	265	#ifdef CONFIG_PM
30ced0f0 A	266	.suspend = ata_pci_device_suspend,
30ced0f0 A	267	.resume = ata_pci_device_resume,
438ac6d5	268	#endif
669a5db4 JG	269	};
	270
	271	static int __init triflex_init(void)
	272	{
	273	return pci_register_driver(&triflex_pci_driver);
	274	}
	275
669a5db4 JG	276	static void __exit triflex_exit(void)
	277	{
	278	pci_unregister_driver(&triflex_pci_driver);
	279	}
	280
669a5db4 JG	281	MODULE_AUTHOR("Alan Cox");
	282	MODULE_DESCRIPTION("low-level driver for Compaq Triflex");
	283	MODULE_LICENSE("GPL");
	284	MODULE_DEVICE_TABLE(pci, triflex);
	285	MODULE_VERSION(DRV_VERSION);
	286
	287	module_init(triflex_init);
	288	module_exit(triflex_exit);