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linux-2.6/drivers/ata/sata_sis.c
Tejun Heo d583bc1881 libata: simplify PCI legacy SFF host handling 
With PCI resource fix up for legacy hosts.  We can use the same code
path to allocate IO resources and initialize host for both legacy and
native SFF hosts.  Only IRQ requesting needs to be different.

Rename ata_pci_*_native_host() to ata_pci_*_sff_host(), kill all
legacy specific functions and use the renamed functions instead.  This
simplifies code a lot.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-07-10 21:27:09 -04:00

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/*
* 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/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 <linux/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>
#include "sis.h"
#define DRV_NAME "sata_sis"
#define DRV_VERSION "0.8"
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 const struct pci_device_id sis_pci_tbl[] = {
{ PCI_VDEVICE(SI, 0x0180), sis_180 }, /* SiS 964/180 */
{ PCI_VDEVICE(SI, 0x0181), sis_180 }, /* SiS 964/180 */
{ PCI_VDEVICE(SI, 0x0182), sis_180 }, /* SiS 965/965L */
{ PCI_VDEVICE(SI, 0x0183), sis_180 }, /* SiS 965/965L */
{ PCI_VDEVICE(SI, 0x1182), sis_180 }, /* SiS 966/680 */
{ PCI_VDEVICE(SI, 0x1183), sis_180 }, /* SiS 966/966L/968/680 */
{ } /* 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 struct scsi_host_template sis_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 = ATA_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 const 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,
.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,
.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,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.irq_ack = ata_irq_ack,
.scr_read = sis_scr_read,
.scr_write = sis_scr_write,
.port_start = ata_port_start,
};
static const struct ata_port_info sis_port_info = {
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = 0x1f,
.mwdma_mask = 0x7,
.udma_mask = ATA_UDMA6,
.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(struct ata_port *ap, unsigned int sc_reg)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
u8 pmr;
if (ap->port_no) {
switch (pdev->device) {
case 0x0180:
case 0x0181:
pci_read_config_byte(pdev, SIS_PMR, &pmr);
if ((pmr & SIS_PMR_COMBINED) == 0)
addr += SIS180_SATA1_OFS;
break;
case 0x0182:
case 0x0183:
case 0x1182:
addr += SIS182_SATA1_OFS;
break;
}
}
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->dev);
unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
u32 val, val2 = 0;
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 == 0x0182) || (pdev->device == 0x0183) ||
(pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
pci_read_config_dword(pdev, cfg_addr+0x10, &val2);
return (val|val2) & 0xfffffffb; /* avoid problems with powerdowned ports */
}
static void sis_scr_cfg_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
u8 pmr;
if (sc_reg == 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 == 0x0182) || (pdev->device == 0x0183) ||
(pdev->device == 0x1182) || (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->dev);
u32 val, val2 = 0;
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 = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4));
if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
(pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
val2 = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4) + 0x10);
return (val | val2) & 0xfffffffb;
}
static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
{
struct pci_dev *pdev = to_pci_dev(ap->host->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 {
iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4));
if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
(pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
}
}
static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
struct ata_port_info pi = sis_port_info;
const struct ata_port_info *ppi[] = { &pi, &pi };
struct ata_host *host;
u32 genctl, val;
u8 pmr;
u8 port2_start = 0x20;
int rc;
if (!printed_version++)
dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
rc = pcim_enable_device(pdev);
if (rc)
return rc;
/* 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)
pi.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 ((!(pi.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);
pi.flags |= SIS_FLAG_CFGSCR;
}
pci_read_config_byte(pdev, SIS_PMR, &pmr);
switch (ent->device) {
case 0x0180:
case 0x0181:
/* The PATA-handling is provided by pata_sis */
switch (pmr & 0x30) {
case 0x10:
ppi[1] = &sis_info133_for_sata;
break;
case 0x30:
ppi[0] = &sis_info133_for_sata;
break;
}
if ((pmr & SIS_PMR_COMBINED) == 0) {
dev_printk(KERN_INFO, &pdev->dev,
"Detected SiS 180/181/964 chipset in SATA mode\n");
port2_start = 64;
} else {
dev_printk(KERN_INFO, &pdev->dev,
"Detected SiS 180/181 chipset in combined mode\n");
port2_start=0;
pi.flags |= ATA_FLAG_SLAVE_POSS;
}
break;
case 0x0182:
case 0x0183:
pci_read_config_dword ( pdev, 0x6C, &val);
if (val & (1L << 31)) {
dev_printk(KERN_INFO, &pdev->dev, "Detected SiS 182/965 chipset\n");
pi.flags |= ATA_FLAG_SLAVE_POSS;
} else {
dev_printk(KERN_INFO, &pdev->dev, "Detected SiS 182/965L chipset\n");
}
break;
case 0x1182:
dev_printk(KERN_INFO, &pdev->dev, "Detected SiS 1182/966/680 SATA controller\n");
pi.flags |= ATA_FLAG_SLAVE_POSS;
break;
case 0x1183:
dev_printk(KERN_INFO, &pdev->dev, "Detected SiS 1183/966/966L/968/680 controller in PATA mode\n");
ppi[0] = &sis_info133_for_sata;
ppi[1] = &sis_info133_for_sata;
break;
}
rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
if (rc)
return rc;
if (!(pi.flags & SIS_FLAG_CFGSCR)) {
void __iomem *mmio;
rc = pcim_iomap_regions(pdev, 1 << SIS_SCR_PCI_BAR, DRV_NAME);
if (rc)
return rc;
mmio = host->iomap[SIS_SCR_PCI_BAR];
host->ports[0]->ioaddr.scr_addr = mmio;
host->ports[1]->ioaddr.scr_addr = mmio + port2_start;
}
pci_set_master(pdev);
pci_intx(pdev, 1);
return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
&sis_sht);
}
static int __init sis_init(void)
{
return pci_register_driver(&sis_pci_driver);
}
static void __exit sis_exit(void)
{
pci_unregister_driver(&sis_pci_driver);
}
module_init(sis_init);
module_exit(sis_exit);
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