[net-next-2.6.git] / drivers / scsi / sata_sis.c

/*
 *  sata_sis.c - Silicon Integrated Systems SATA
 *
 *  Maintained by:  Uwe Koziolek
 *  		    Please ALWAYS copy linux-ide@vger.kernel.org
 *		    on emails.
 *
 *  Copyright 2004 Uwe Koziolek
 *
 *
 *  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.
 *
 *
 *  libata documentation is available via 'make {ps|pdf}docs',
 *  as Documentation/DocBook/libata.*
 *
 *  Hardware documentation available under NDA.
 *
 */

#include <linux/config.h>
#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 <linux/interrupt.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include <linux/libata.h>

#define DRV_NAME	"sata_sis"
#define DRV_VERSION	"0.5"

enum {
	sis_180			= 0,
	SIS_SCR_PCI_BAR		= 5,

	/* PCI configuration registers */
	SIS_GENCTL		= 0x54, /* IDE General Control register */
	SIS_SCR_BASE		= 0xc0, /* sata0 phy SCR registers */
	SIS180_SATA1_OFS	= 0x10, /* offset from sata0->sata1 phy regs */
	SIS182_SATA1_OFS	= 0x20, /* offset from sata0->sata1 phy regs */
	SIS_PMR			= 0x90, /* port mapping register */
	SIS_PMR_COMBINED	= 0x30, 

	/* random bits */
	SIS_FLAG_CFGSCR		= (1 << 30), /* host flag: SCRs via PCI cfg */

	GENCTL_IOMAPPED_SCR	= (1 << 26), /* if set, SCRs are in IO space */
};

static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);

static struct pci_device_id sis_pci_tbl[] = {
	{ PCI_VENDOR_ID_SI, 0x180, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
	{ PCI_VENDOR_ID_SI, 0x181, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
	{ PCI_VENDOR_ID_SI, 0x182, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
	{ }	/* terminate list */
};


static struct pci_driver sis_pci_driver = {
	.name			= DRV_NAME,
	.id_table		= sis_pci_tbl,
	.probe			= sis_init_one,
	.remove			= ata_pci_remove_one,
};

static Scsi_Host_Template sis_sht = {
	.module			= THIS_MODULE,
	.name			= DRV_NAME,
	.ioctl			= ata_scsi_ioctl,
	.queuecommand		= ata_scsi_queuecmd,
	.eh_strategy_handler	= ata_scsi_error,
	.can_queue		= ATA_DEF_QUEUE,
	.this_id		= ATA_SHT_THIS_ID,
	.sg_tablesize		= ATA_MAX_PRD,
	.max_sectors		= ATA_MAX_SECTORS,
	.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,
	.bios_param		= ata_std_bios_param,
	.ordered_flush		= 1,
};

static struct ata_port_operations sis_ops = {
	.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,
	.phy_reset		= sata_phy_reset,
	.bmdma_setup            = ata_bmdma_setup,
	.bmdma_start            = ata_bmdma_start,
	.bmdma_stop		= ata_bmdma_stop,
	.bmdma_status		= ata_bmdma_status,
	.qc_prep		= ata_qc_prep,
	.qc_issue		= ata_qc_issue_prot,
	.eng_timeout		= ata_eng_timeout,
	.irq_handler		= ata_interrupt,
	.irq_clear		= ata_bmdma_irq_clear,
	.scr_read		= sis_scr_read,
	.scr_write		= sis_scr_write,
	.port_start		= ata_port_start,
	.port_stop		= ata_port_stop,
	.host_stop		= ata_host_stop,
};

static struct ata_port_info sis_port_info = {
	.sht		= &sis_sht,
	.host_flags	= ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
			  ATA_FLAG_NO_LEGACY,
	.pio_mask	= 0x1f,
	.mwdma_mask	= 0x7,
	.udma_mask	= 0x7f,
	.port_ops	= &sis_ops,
};


MODULE_AUTHOR("Uwe Koziolek");
MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
MODULE_VERSION(DRV_VERSION);

static unsigned int get_scr_cfg_addr(unsigned int port_no, unsigned int sc_reg, int device)
{
	unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);

	if (port_no) 
		if (device == 0x182)
			addr += SIS182_SATA1_OFS;
		else
			addr += SIS180_SATA1_OFS;
	return addr;
}

static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
{
	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
	unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, sc_reg, pdev->device);
	u32 val, val2;
	u8 pmr;

	if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
		return 0xffffffff;

	pci_read_config_byte(pdev, SIS_PMR, &pmr);
	
	pci_read_config_dword(pdev, cfg_addr, &val);

	if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) 
		pci_read_config_dword(pdev, cfg_addr+0x10, &val2);

	return val|val2;
}

static void sis_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
{
	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
	unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, scr, pdev->device);
	u8 pmr;

	if (scr == SCR_ERROR) /* doesn't exist in PCI cfg space */
		return;

	pci_read_config_byte(pdev, SIS_PMR, &pmr);
	
	pci_write_config_dword(pdev, cfg_addr, val);

	if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED))
		pci_write_config_dword(pdev, cfg_addr+0x10, val);
}

static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
	u32 val,val2;
	u8 pmr;

	if (sc_reg > SCR_CONTROL)
		return 0xffffffffU;

	if (ap->flags & SIS_FLAG_CFGSCR)
		return sis_scr_cfg_read(ap, sc_reg);

	pci_read_config_byte(pdev, SIS_PMR, &pmr);

	val = inl(ap->ioaddr.scr_addr + (sc_reg * 4));

	if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED))
		val2 = inl(ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);

	return val|val2;
}

static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
{
	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
	u8 pmr;

	if (sc_reg > SCR_CONTROL)
		return;

	pci_read_config_byte(pdev, SIS_PMR, &pmr);
	
	if (ap->flags & SIS_FLAG_CFGSCR)
		sis_scr_cfg_write(ap, sc_reg, val);
	else {
		outl(val, ap->ioaddr.scr_addr + (sc_reg * 4));
		if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED))
			outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
	}
}

static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct ata_probe_ent *probe_ent = NULL;
	int rc;
	u32 genctl;
	struct ata_port_info *ppi;
	int pci_dev_busy = 0;
	u8 pmr;
	u8 port2_start;

	rc = pci_enable_device(pdev);
	if (rc)
		return rc;

	rc = pci_request_regions(pdev, DRV_NAME);
	if (rc) {
		pci_dev_busy = 1;
		goto err_out;
	}

	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
	if (rc)
		goto err_out_regions;
	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
	if (rc)
		goto err_out_regions;

	ppi = &sis_port_info;
	probe_ent = ata_pci_init_native_mode(pdev, &ppi);
	if (!probe_ent) {
		rc = -ENOMEM;
		goto err_out_regions;
	}

	/* check and see if the SCRs are in IO space or PCI cfg space */
	pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
	if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
		probe_ent->host_flags |= SIS_FLAG_CFGSCR;

	/* if hardware thinks SCRs are in IO space, but there are
	 * no IO resources assigned, change to PCI cfg space.
	 */
	if ((!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) &&
	    ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
	     (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
		genctl &= ~GENCTL_IOMAPPED_SCR;
		pci_write_config_dword(pdev, SIS_GENCTL, genctl);
		probe_ent->host_flags |= SIS_FLAG_CFGSCR;
	}

	pci_read_config_byte(pdev, SIS_PMR, &pmr);
	if (ent->device != 0x182) {
		if ((pmr & SIS_PMR_COMBINED) == 0) {
			printk(KERN_INFO "sata_sis: Detected SiS 180/181 chipset in SATA mode\n");
			port2_start=0x64;
		}
		else {
			printk(KERN_INFO "sata_sis: Detected SiS 180/181 chipset in combined mode\n");
			port2_start=0;
		}
	}
	else {
		printk(KERN_INFO "sata_sis: Detected SiS 182 chipset\n");
		port2_start = 0x20;
	}

	if (!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) {
		probe_ent->port[0].scr_addr =
			pci_resource_start(pdev, SIS_SCR_PCI_BAR);
		probe_ent->port[1].scr_addr =
			pci_resource_start(pdev, SIS_SCR_PCI_BAR) + port2_start;
	}

	pci_set_master(pdev);
	pci_intx(pdev, 1);

	/* FIXME: check ata_device_add return value */
	ata_device_add(probe_ent);
	kfree(probe_ent);

	return 0;

err_out_regions:
	pci_release_regions(pdev);

err_out:
	if (!pci_dev_busy)
		pci_disable_device(pdev);
	return rc;

}

static int __init sis_init(void)
{
	return pci_module_init(&sis_pci_driver);
}

static void __exit sis_exit(void)
{
	pci_unregister_driver(&sis_pci_driver);
}

module_init(sis_init);
module_exit(sis_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* sata_sis.c - Silicon Integrated Systems SATA
	3	*
	4	* Maintained by: Uwe Koziolek
	5	* Please ALWAYS copy linux-ide@vger.kernel.org
	6	* on emails.
	7	*
	8	* Copyright 2004 Uwe Koziolek
	9	*
af36d7f0 JG	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2, or (at your option)
	14	* any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; see the file COPYING. If not, write to
	23	* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*
	25	*
	26	* libata documentation is available via 'make {ps\|pdf}docs',
	27	* as Documentation/DocBook/libata.*
	28	*
	29	* Hardware documentation available under NDA.
1da177e4 LT	30	*
	31	*/
	32
	33	#include <linux/config.h>
	34	#include <linux/kernel.h>
	35	#include <linux/module.h>
	36	#include <linux/pci.h>
	37	#include <linux/init.h>
	38	#include <linux/blkdev.h>
	39	#include <linux/delay.h>
	40	#include <linux/interrupt.h>
	41	#include "scsi.h"
	42	#include <scsi/scsi_host.h>
	43	#include <linux/libata.h>
	44
	45	#define DRV_NAME "sata_sis"
	46	#define DRV_VERSION "0.5"
	47
	48	enum {
	49	sis_180 = 0,
	50	SIS_SCR_PCI_BAR = 5,
	51
	52	/* PCI configuration registers */
	53	SIS_GENCTL = 0x54, /* IDE General Control register */
	54	SIS_SCR_BASE = 0xc0, /* sata0 phy SCR registers */
f2c853bc AP	55	SIS180_SATA1_OFS = 0x10, /* offset from sata0->sata1 phy regs */
	56	SIS182_SATA1_OFS = 0x20, /* offset from sata0->sata1 phy regs */
	57	SIS_PMR = 0x90, /* port mapping register */
	58	SIS_PMR_COMBINED = 0x30,
1da177e4 LT	59
	60	/* random bits */
	61	SIS_FLAG_CFGSCR = (1 << 30), /* host flag: SCRs via PCI cfg */
	62
	63	GENCTL_IOMAPPED_SCR = (1 << 26), /* if set, SCRs are in IO space */
	64	};
	65
	66	static int sis_init_one (struct pci_dev pdev, const struct pci_device_id ent);
	67	static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg);
	68	static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
	69
	70	static struct pci_device_id sis_pci_tbl[] = {
	71	{ PCI_VENDOR_ID_SI, 0x180, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
	72	{ PCI_VENDOR_ID_SI, 0x181, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
f2c853bc	73	{ PCI_VENDOR_ID_SI, 0x182, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
1da177e4 LT	74	{ } /* terminate list */
	75	};
	76
	77
	78	static struct pci_driver sis_pci_driver = {
	79	.name = DRV_NAME,
	80	.id_table = sis_pci_tbl,
	81	.probe = sis_init_one,
	82	.remove = ata_pci_remove_one,
	83	};
	84
	85	static Scsi_Host_Template sis_sht = {
	86	.module = THIS_MODULE,
	87	.name = DRV_NAME,
	88	.ioctl = ata_scsi_ioctl,
	89	.queuecommand = ata_scsi_queuecmd,
	90	.eh_strategy_handler = ata_scsi_error,
	91	.can_queue = ATA_DEF_QUEUE,
	92	.this_id = ATA_SHT_THIS_ID,
	93	.sg_tablesize = ATA_MAX_PRD,
	94	.max_sectors = ATA_MAX_SECTORS,
	95	.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
	96	.emulated = ATA_SHT_EMULATED,
	97	.use_clustering = ATA_SHT_USE_CLUSTERING,
	98	.proc_name = DRV_NAME,
	99	.dma_boundary = ATA_DMA_BOUNDARY,
	100	.slave_configure = ata_scsi_slave_config,
	101	.bios_param = ata_std_bios_param,
	102	.ordered_flush = 1,
	103	};
	104
	105	static struct ata_port_operations sis_ops = {
	106	.port_disable = ata_port_disable,
	107	.tf_load = ata_tf_load,
	108	.tf_read = ata_tf_read,
	109	.check_status = ata_check_status,
	110	.exec_command = ata_exec_command,
	111	.dev_select = ata_std_dev_select,
	112	.phy_reset = sata_phy_reset,
	113	.bmdma_setup = ata_bmdma_setup,
	114	.bmdma_start = ata_bmdma_start,
	115	.bmdma_stop = ata_bmdma_stop,
	116	.bmdma_status = ata_bmdma_status,
	117	.qc_prep = ata_qc_prep,
	118	.qc_issue = ata_qc_issue_prot,
	119	.eng_timeout = ata_eng_timeout,
	120	.irq_handler = ata_interrupt,
	121	.irq_clear = ata_bmdma_irq_clear,
	122	.scr_read = sis_scr_read,
	123	.scr_write = sis_scr_write,
	124	.port_start = ata_port_start,
	125	.port_stop = ata_port_stop,
aa8f0dc6	126	.host_stop = ata_host_stop,
1da177e4 LT	127	};
	128
	129	static struct ata_port_info sis_port_info = {
	130	.sht = &sis_sht,
	131	.host_flags = ATA_FLAG_SATA \| ATA_FLAG_SATA_RESET \|
	132	ATA_FLAG_NO_LEGACY,
	133	.pio_mask = 0x1f,
	134	.mwdma_mask = 0x7,
	135	.udma_mask = 0x7f,
	136	.port_ops = &sis_ops,
	137	};
	138
	139
	140	MODULE_AUTHOR("Uwe Koziolek");
	141	MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller");
	142	MODULE_LICENSE("GPL");
	143	MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
	144	MODULE_VERSION(DRV_VERSION);
	145
f2c853bc	146	static unsigned int get_scr_cfg_addr(unsigned int port_no, unsigned int sc_reg, int device)
1da177e4 LT	147	{
	148	unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
	149
f2c853bc AP	150	if (port_no)
	151	if (device == 0x182)
	152	addr += SIS182_SATA1_OFS;
	153	else
	154	addr += SIS180_SATA1_OFS;
1da177e4 LT	155	return addr;
	156	}
	157
	158	static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
	159	{
	160	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
f2c853bc AP	161	unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, sc_reg, pdev->device);
	162	u32 val, val2;
	163	u8 pmr;
1da177e4 LT	164
	165	if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
	166	return 0xffffffff;
f2c853bc AP	167
	168	pci_read_config_byte(pdev, SIS_PMR, &pmr);
	169
1da177e4	170	pci_read_config_dword(pdev, cfg_addr, &val);
f2c853bc AP	171
	172	if ((pdev->device == 0x182) \|\| (pmr & SIS_PMR_COMBINED))
	173	pci_read_config_dword(pdev, cfg_addr+0x10, &val2);
	174
	175	return val\|val2;
1da177e4 LT	176	}
	177
	178	static void sis_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
	179	{
	180	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
f2c853bc AP	181	unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, scr, pdev->device);
f2c853bc AP	182	u8 pmr;
1da177e4 LT	183
	184	if (scr == SCR_ERROR) /* doesn't exist in PCI cfg space */
	185	return;
f2c853bc AP	186
	187	pci_read_config_byte(pdev, SIS_PMR, &pmr);
	188
1da177e4	189	pci_write_config_dword(pdev, cfg_addr, val);
f2c853bc AP	190
	191	if ((pdev->device == 0x182) \|\| (pmr & SIS_PMR_COMBINED))
	192	pci_write_config_dword(pdev, cfg_addr+0x10, val);
1da177e4 LT	193	}
	194
	195	static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg)
	196	{
f2c853bc AP	197	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
	198	u32 val,val2;
	199	u8 pmr;
	200
1da177e4 LT	201	if (sc_reg > SCR_CONTROL)
	202	return 0xffffffffU;
	203
	204	if (ap->flags & SIS_FLAG_CFGSCR)
	205	return sis_scr_cfg_read(ap, sc_reg);
f2c853bc AP	206
	207	pci_read_config_byte(pdev, SIS_PMR, &pmr);
	208
	209	val = inl(ap->ioaddr.scr_addr + (sc_reg * 4));
	210
	211	if ((pdev->device == 0x182) \|\| (pmr & SIS_PMR_COMBINED))
	212	val2 = inl(ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
	213
	214	return val\|val2;
1da177e4 LT	215	}
	216
	217	static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
	218	{
f2c853bc AP	219	struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
	220	u8 pmr;
	221
1da177e4 LT	222	if (sc_reg > SCR_CONTROL)
	223	return;
	224
f2c853bc AP	225	pci_read_config_byte(pdev, SIS_PMR, &pmr);
f2c853bc AP	226
1da177e4 LT	227	if (ap->flags & SIS_FLAG_CFGSCR)
1da177e4 LT	228	sis_scr_cfg_write(ap, sc_reg, val);
f2c853bc	229	else {
1da177e4	230	outl(val, ap->ioaddr.scr_addr + (sc_reg * 4));
f2c853bc AP	231	if ((pdev->device == 0x182) \|\| (pmr & SIS_PMR_COMBINED))
	232	outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
	233	}
1da177e4 LT	234	}
1da177e4 LT	235
1da177e4 LT	236	static int sis_init_one (struct pci_dev pdev, const struct pci_device_id ent)
	237	{
	238	struct ata_probe_ent *probe_ent = NULL;
	239	int rc;
	240	u32 genctl;
	241	struct ata_port_info *ppi;
	242	int pci_dev_busy = 0;
f2c853bc AP	243	u8 pmr;
f2c853bc AP	244	u8 port2_start;
1da177e4 LT	245
	246	rc = pci_enable_device(pdev);
	247	if (rc)
	248	return rc;
	249
	250	rc = pci_request_regions(pdev, DRV_NAME);
	251	if (rc) {
	252	pci_dev_busy = 1;
	253	goto err_out;
	254	}
	255
	256	rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
	257	if (rc)
	258	goto err_out_regions;
	259	rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
	260	if (rc)
	261	goto err_out_regions;
	262
	263	ppi = &sis_port_info;
	264	probe_ent = ata_pci_init_native_mode(pdev, &ppi);
	265	if (!probe_ent) {
	266	rc = -ENOMEM;
	267	goto err_out_regions;
	268	}
	269
	270	/* check and see if the SCRs are in IO space or PCI cfg space */
	271	pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
	272	if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
	273	probe_ent->host_flags \|= SIS_FLAG_CFGSCR;
8a60a071	274
1da177e4 LT	275	/* if hardware thinks SCRs are in IO space, but there are
	276	* no IO resources assigned, change to PCI cfg space.
	277	*/
	278	if ((!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) &&
	279	((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) \|\|
	280	(pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
	281	genctl &= ~GENCTL_IOMAPPED_SCR;
	282	pci_write_config_dword(pdev, SIS_GENCTL, genctl);
	283	probe_ent->host_flags \|= SIS_FLAG_CFGSCR;
	284	}
	285
f2c853bc AP	286	pci_read_config_byte(pdev, SIS_PMR, &pmr);
	287	if (ent->device != 0x182) {
	288	if ((pmr & SIS_PMR_COMBINED) == 0) {
	289	printk(KERN_INFO "sata_sis: Detected SiS 180/181 chipset in SATA mode\n");
	290	port2_start=0x64;
	291	}
	292	else {
	293	printk(KERN_INFO "sata_sis: Detected SiS 180/181 chipset in combined mode\n");
	294	port2_start=0;
	295	}
	296	}
	297	else {
	298	printk(KERN_INFO "sata_sis: Detected SiS 182 chipset\n");
	299	port2_start = 0x20;
	300	}
	301
1da177e4 LT	302	if (!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) {
	303	probe_ent->port[0].scr_addr =
	304	pci_resource_start(pdev, SIS_SCR_PCI_BAR);
	305	probe_ent->port[1].scr_addr =
f2c853bc	306	pci_resource_start(pdev, SIS_SCR_PCI_BAR) + port2_start;
1da177e4 LT	307	}
	308
	309	pci_set_master(pdev);
a04ce0ff	310	pci_intx(pdev, 1);
1da177e4 LT	311
	312	/* FIXME: check ata_device_add return value */
	313	ata_device_add(probe_ent);
	314	kfree(probe_ent);
	315
	316	return 0;
	317
	318	err_out_regions:
	319	pci_release_regions(pdev);
	320
	321	err_out:
	322	if (!pci_dev_busy)
	323	pci_disable_device(pdev);
	324	return rc;
	325
	326	}
	327
	328	static int __init sis_init(void)
	329	{
	330	return pci_module_init(&sis_pci_driver);
	331	}
	332
	333	static void __exit sis_exit(void)
	334	{
	335	pci_unregister_driver(&sis_pci_driver);
	336	}
	337
	338	module_init(sis_init);
	339	module_exit(sis_exit);
	340