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OpenCloudOS-Kernel/drivers/scsi/sata_sil.c

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/*
* sata_sil.c - Silicon Image SATA
*
* Maintained by: Jeff Garzik <jgarzik@pobox.com>
* Please ALWAYS copy linux-ide@vger.kernel.org
* on emails.
*
* Copyright 2003-2005 Red Hat, Inc.
* Copyright 2003 Benjamin Herrenschmidt
*
*
* 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.*
*
* Documentation for SiI 3112:
* http://gkernel.sourceforge.net/specs/sii/3112A_SiI-DS-0095-B2.pdf.bz2
*
* Other errata and 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>
#define DRV_NAME "sata_sil"
#define DRV_VERSION "0.9"
enum {
/*
* host flags
*/
SIL_FLAG_RERR_ON_DMA_ACT = (1 << 29),
SIL_FLAG_MOD15WRITE = (1 << 30),
SIL_DFL_HOST_FLAGS = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO,
/*
* Controller IDs
*/
sil_3112 = 0,
sil_3512 = 1,
sil_3114 = 2,
/*
* Register offsets
*/
SIL_SYSCFG = 0x48,
/*
* Register bits
*/
/* SYSCFG */
SIL_MASK_IDE0_INT = (1 << 22),
SIL_MASK_IDE1_INT = (1 << 23),
SIL_MASK_IDE2_INT = (1 << 24),
SIL_MASK_IDE3_INT = (1 << 25),
SIL_MASK_2PORT = SIL_MASK_IDE0_INT | SIL_MASK_IDE1_INT,
SIL_MASK_4PORT = SIL_MASK_2PORT |
SIL_MASK_IDE2_INT | SIL_MASK_IDE3_INT,
/* BMDMA/BMDMA2 */
SIL_INTR_STEERING = (1 << 1),
/*
* Others
*/
SIL_QUIRK_MOD15WRITE = (1 << 0),
SIL_QUIRK_UDMA5MAX = (1 << 1),
};
static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
static void sil_dev_config(struct ata_port *ap, struct ata_device *dev);
static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg);
static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
static void sil_post_set_mode (struct ata_port *ap);
static const struct pci_device_id sil_pci_tbl[] = {
{ 0x1095, 0x3112, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
{ 0x1095, 0x0240, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
{ 0x1095, 0x3512, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3512 },
{ 0x1095, 0x3114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3114 },
{ 0x1002, 0x436e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
{ 0x1002, 0x4379, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
{ 0x1002, 0x437a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
{ } /* terminate list */
};
/* TODO firmware versions should be added - eric */
static const struct sil_drivelist {
const char * product;
unsigned int quirk;
} sil_blacklist [] = {
{ "ST320012AS", SIL_QUIRK_MOD15WRITE },
{ "ST330013AS", SIL_QUIRK_MOD15WRITE },
{ "ST340017AS", SIL_QUIRK_MOD15WRITE },
{ "ST360015AS", SIL_QUIRK_MOD15WRITE },
{ "ST380013AS", SIL_QUIRK_MOD15WRITE },
{ "ST380023AS", SIL_QUIRK_MOD15WRITE },
{ "ST3120023AS", SIL_QUIRK_MOD15WRITE },
{ "ST3160023AS", SIL_QUIRK_MOD15WRITE },
{ "ST3120026AS", SIL_QUIRK_MOD15WRITE },
{ "ST3200822AS", SIL_QUIRK_MOD15WRITE },
{ "ST340014ASL", SIL_QUIRK_MOD15WRITE },
{ "ST360014ASL", SIL_QUIRK_MOD15WRITE },
{ "ST380011ASL", SIL_QUIRK_MOD15WRITE },
{ "ST3120022ASL", SIL_QUIRK_MOD15WRITE },
{ "ST3160021ASL", SIL_QUIRK_MOD15WRITE },
{ "Maxtor 4D060H3", SIL_QUIRK_UDMA5MAX },
{ }
};
static struct pci_driver sil_pci_driver = {
.name = DRV_NAME,
.id_table = sil_pci_tbl,
.probe = sil_init_one,
.remove = ata_pci_remove_one,
};
static struct scsi_host_template sil_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 = 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,
.bios_param = ata_std_bios_param,
};
static const struct ata_port_operations sil_ops = {
.port_disable = ata_port_disable,
.dev_config = sil_dev_config,
.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,
.probe_reset = ata_std_probe_reset,
.post_set_mode = sil_post_set_mode,
.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 = sil_scr_read,
.scr_write = sil_scr_write,
.port_start = ata_port_start,
.port_stop = ata_port_stop,
.host_stop = ata_pci_host_stop,
};
static const struct ata_port_info sil_port_info[] = {
/* sil_3112 */
{
.sht = &sil_sht,
.host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_MOD15WRITE,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x3f, /* udma0-5 */
.port_ops = &sil_ops,
},
/* sil_3512 */
{
.sht = &sil_sht,
.host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x3f, /* udma0-5 */
.port_ops = &sil_ops,
},
/* sil_3114 */
{
.sht = &sil_sht,
.host_flags = SIL_DFL_HOST_FLAGS | SIL_FLAG_RERR_ON_DMA_ACT,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = 0x3f, /* udma0-5 */
.port_ops = &sil_ops,
},
};
/* per-port register offsets */
/* TODO: we can probably calculate rather than use a table */
static const struct {
unsigned long tf; /* ATA taskfile register block */
unsigned long ctl; /* ATA control/altstatus register block */
unsigned long bmdma; /* DMA register block */
unsigned long fifo_cfg; /* FIFO Valid Byte Count and Control */
unsigned long scr; /* SATA control register block */
unsigned long sien; /* SATA Interrupt Enable register */
unsigned long xfer_mode;/* data transfer mode register */
unsigned long sfis_cfg; /* SATA FIS reception config register */
} sil_port[] = {
/* port 0 ... */
{ 0x80, 0x8A, 0x00, 0x40, 0x100, 0x148, 0xb4, 0x14c },
{ 0xC0, 0xCA, 0x08, 0x44, 0x180, 0x1c8, 0xf4, 0x1cc },
{ 0x280, 0x28A, 0x200, 0x240, 0x300, 0x348, 0x2b4, 0x34c },
{ 0x2C0, 0x2CA, 0x208, 0x244, 0x380, 0x3c8, 0x2f4, 0x3cc },
/* ... port 3 */
};
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("low-level driver for Silicon Image SATA controller");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, sil_pci_tbl);
MODULE_VERSION(DRV_VERSION);
static int slow_down = 0;
module_param(slow_down, int, 0444);
MODULE_PARM_DESC(slow_down, "Sledgehammer used to work around random problems, by limiting commands to 15 sectors (0=off, 1=on)");
static unsigned char sil_get_device_cache_line(struct pci_dev *pdev)
{
u8 cache_line = 0;
pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line);
return cache_line;
}
static void sil_post_set_mode (struct ata_port *ap)
{
struct ata_host_set *host_set = ap->host_set;
struct ata_device *dev;
void __iomem *addr =
host_set->mmio_base + sil_port[ap->port_no].xfer_mode;
u32 tmp, dev_mode[2];
unsigned int i;
for (i = 0; i < 2; i++) {
dev = &ap->device[i];
if (!ata_dev_present(dev))
dev_mode[i] = 0; /* PIO0/1/2 */
else if (dev->flags & ATA_DFLAG_PIO)
dev_mode[i] = 1; /* PIO3/4 */
else
dev_mode[i] = 3; /* UDMA */
/* value 2 indicates MDMA */
}
tmp = readl(addr);
tmp &= ~((1<<5) | (1<<4) | (1<<1) | (1<<0));
tmp |= dev_mode[0];
tmp |= (dev_mode[1] << 4);
writel(tmp, addr);
readl(addr); /* flush */
}
static inline unsigned long sil_scr_addr(struct ata_port *ap, unsigned int sc_reg)
{
unsigned long offset = ap->ioaddr.scr_addr;
switch (sc_reg) {
case SCR_STATUS:
return offset + 4;
case SCR_ERROR:
return offset + 8;
case SCR_CONTROL:
return offset;
default:
/* do nothing */
break;
}
return 0;
}
static u32 sil_scr_read (struct ata_port *ap, unsigned int sc_reg)
{
void __iomem *mmio = (void __iomem *) sil_scr_addr(ap, sc_reg);
if (mmio)
return readl(mmio);
return 0xffffffffU;
}
static void sil_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
{
void *mmio = (void __iomem *) sil_scr_addr(ap, sc_reg);
if (mmio)
writel(val, mmio);
}
/**
* sil_dev_config - Apply device/host-specific errata fixups
* @ap: Port containing device to be examined
* @dev: Device to be examined
*
* After the IDENTIFY [PACKET] DEVICE step is complete, and a
* device is known to be present, this function is called.
* We apply two errata fixups which are specific to Silicon Image,
* a Seagate and a Maxtor fixup.
*
* For certain Seagate devices, we must limit the maximum sectors
* to under 8K.
*
* For certain Maxtor devices, we must not program the drive
* beyond udma5.
*
* Both fixups are unfairly pessimistic. As soon as I get more
* information on these errata, I will create a more exhaustive
* list, and apply the fixups to only the specific
* devices/hosts/firmwares that need it.
*
* 20040111 - Seagate drives affected by the Mod15Write bug are blacklisted
* The Maxtor quirk is in the blacklist, but I'm keeping the original
* pessimistic fix for the following reasons...
* - There seems to be less info on it, only one device gleaned off the
* Windows driver, maybe only one is affected. More info would be greatly
* appreciated.
* - But then again UDMA5 is hardly anything to complain about
*/
static void sil_dev_config(struct ata_port *ap, struct ata_device *dev)
{
unsigned int n, quirks = 0;
unsigned char model_num[41];
ata_id_c_string(dev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
for (n = 0; sil_blacklist[n].product; n++)
if (!strcmp(sil_blacklist[n].product, model_num)) {
quirks = sil_blacklist[n].quirk;
break;
}
/* limit requests to 15 sectors */
if (slow_down ||
((ap->flags & SIL_FLAG_MOD15WRITE) &&
(quirks & SIL_QUIRK_MOD15WRITE))) {
printk(KERN_INFO "ata%u(%u): applying Seagate errata fix (mod15write workaround)\n",
ap->id, dev->devno);
dev->max_sectors = 15;
return;
}
/* limit to udma5 */
if (quirks & SIL_QUIRK_UDMA5MAX) {
printk(KERN_INFO "ata%u(%u): applying Maxtor errata fix %s\n",
ap->id, dev->devno, model_num);
dev->udma_mask &= ATA_UDMA5;
return;
}
}
static int sil_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
struct ata_probe_ent *probe_ent = NULL;
unsigned long base;
void __iomem *mmio_base;
int rc;
unsigned int i;
int pci_dev_busy = 0;
u32 tmp, irq_mask;
u8 cls;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
/*
* If this driver happens to only be useful on Apple's K2, then
* we should check that here as it has a normal Serverworks ID
*/
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;
probe_ent = kzalloc(sizeof(*probe_ent), GFP_KERNEL);
if (probe_ent == NULL) {
rc = -ENOMEM;
goto err_out_regions;
}
INIT_LIST_HEAD(&probe_ent->node);
probe_ent->dev = pci_dev_to_dev(pdev);
probe_ent->port_ops = sil_port_info[ent->driver_data].port_ops;
probe_ent->sht = sil_port_info[ent->driver_data].sht;
probe_ent->n_ports = (ent->driver_data == sil_3114) ? 4 : 2;
probe_ent->pio_mask = sil_port_info[ent->driver_data].pio_mask;
probe_ent->mwdma_mask = sil_port_info[ent->driver_data].mwdma_mask;
probe_ent->udma_mask = sil_port_info[ent->driver_data].udma_mask;
probe_ent->irq = pdev->irq;
probe_ent->irq_flags = SA_SHIRQ;
probe_ent->host_flags = sil_port_info[ent->driver_data].host_flags;
mmio_base = pci_iomap(pdev, 5, 0);
if (mmio_base == NULL) {
rc = -ENOMEM;
goto err_out_free_ent;
}
probe_ent->mmio_base = mmio_base;
base = (unsigned long) mmio_base;
for (i = 0; i < probe_ent->n_ports; i++) {
probe_ent->port[i].cmd_addr = base + sil_port[i].tf;
probe_ent->port[i].altstatus_addr =
probe_ent->port[i].ctl_addr = base + sil_port[i].ctl;
probe_ent->port[i].bmdma_addr = base + sil_port[i].bmdma;
probe_ent->port[i].scr_addr = base + sil_port[i].scr;
ata_std_ports(&probe_ent->port[i]);
}
/* Initialize FIFO PCI bus arbitration */
cls = sil_get_device_cache_line(pdev);
if (cls) {
cls >>= 3;
cls++; /* cls = (line_size/8)+1 */
for (i = 0; i < probe_ent->n_ports; i++)
writew(cls << 8 | cls,
mmio_base + sil_port[i].fifo_cfg);
} else
dev_printk(KERN_WARNING, &pdev->dev,
"cache line size not set. Driver may not function\n");
/* Apply R_ERR on DMA activate FIS errata workaround */
if (probe_ent->host_flags & SIL_FLAG_RERR_ON_DMA_ACT) {
int cnt;
for (i = 0, cnt = 0; i < probe_ent->n_ports; i++) {
tmp = readl(mmio_base + sil_port[i].sfis_cfg);
if ((tmp & 0x3) != 0x01)
continue;
if (!cnt)
dev_printk(KERN_INFO, &pdev->dev,
"Applying R_ERR on DMA activate "
"FIS errata fix\n");
writel(tmp & ~0x3, mmio_base + sil_port[i].sfis_cfg);
cnt++;
}
}
if (ent->driver_data == sil_3114) {
irq_mask = SIL_MASK_4PORT;
/* flip the magic "make 4 ports work" bit */
tmp = readl(mmio_base + sil_port[2].bmdma);
if ((tmp & SIL_INTR_STEERING) == 0)
writel(tmp | SIL_INTR_STEERING,
mmio_base + sil_port[2].bmdma);
} else {
irq_mask = SIL_MASK_2PORT;
}
/* make sure IDE0/1/2/3 interrupts are not masked */
tmp = readl(mmio_base + SIL_SYSCFG);
if (tmp & irq_mask) {
tmp &= ~irq_mask;
writel(tmp, mmio_base + SIL_SYSCFG);
readl(mmio_base + SIL_SYSCFG); /* flush */
}
/* mask all SATA phy-related interrupts */
/* TODO: unmask bit 6 (SError N bit) for hotplug */
for (i = 0; i < probe_ent->n_ports; i++)
writel(0, mmio_base + sil_port[i].sien);
pci_set_master(pdev);
/* FIXME: check ata_device_add return value */
ata_device_add(probe_ent);
kfree(probe_ent);
return 0;
err_out_free_ent:
kfree(probe_ent);
err_out_regions:
pci_release_regions(pdev);
err_out:
if (!pci_dev_busy)
pci_disable_device(pdev);
return rc;
}
static int __init sil_init(void)
{
return pci_module_init(&sil_pci_driver);
}
static void __exit sil_exit(void)
{
pci_unregister_driver(&sil_pci_driver);
}
module_init(sil_init);
module_exit(sil_exit);
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