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linux/drivers/ata/pata_serverworks.c
Tejun Heo 887125e374 libata: stop overloading port_info->private_data 
port_info->private_data is currently used for two purposes - to record
private data about the port_info or to specify host->private_data to
use when allocating ata_host.

This overloading is confusing and counter-intuitive in that
port_info->private_data becomes host->private_data instead of
port->private_data.  In addition, port_info and host don't correspond
to each other 1-to-1.  Currently, the first non-NULL
port_info->private_data is used.

This patch makes port_info->private_data just be what it is -
private_data for the port_info where LLD can jot down extra info.
libata no longer sets host->private_data to the first non-NULL
port_info->private_data, @host_priv argument is added to
ata_pci_init_one() instead.  LLDs which use ata_pci_init_one() can use
this argument to pass in pointer to host private data.  LLDs which
don't should use init-register model anyway and can initialize
host->private_data directly.

Adding @host_priv instead of using init-register model for LLDs which
use ata_pci_init_one() is suggested by Alan Cox.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
2008-04-17 15:44:17 -04:00

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/*
* pata_serverworks.c - Serverworks PATA for new ATA layer
* (C) 2005 Red Hat Inc
* Alan Cox <alan@redhat.com>
*
* based upon
*
* serverworks.c
*
* Copyright (C) 1998-2000 Michel Aubry
* Copyright (C) 1998-2000 Andrzej Krzysztofowicz
* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
* Portions copyright (c) 2001 Sun Microsystems
*
*
* RCC/ServerWorks IDE driver for Linux
*
* OSB4: `Open South Bridge' IDE Interface (fn 1)
* supports UDMA mode 2 (33 MB/s)
*
* CSB5: `Champion South Bridge' IDE Interface (fn 1)
* all revisions support UDMA mode 4 (66 MB/s)
* revision A2.0 and up support UDMA mode 5 (100 MB/s)
*
* *** The CSB5 does not provide ANY register ***
* *** to detect 80-conductor cable presence. ***
*
* CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
*
* Documentation:
* Available under NDA only. Errata info very hard to get.
*/
#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_serverworks"
#define DRV_VERSION "0.4.3"
#define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
#define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
/* Seagate Barracuda ATA IV Family drives in UDMA mode 5
* can overrun their FIFOs when used with the CSB5 */
static const char *csb_bad_ata100[] = {
"ST320011A",
"ST340016A",
"ST360021A",
"ST380021A",
NULL
};
/**
* dell_cable - Dell serverworks cable detection
* @ap: ATA port to do cable detect
*
* Dell hide the 40/80 pin select for their interfaces in the top two
* bits of the subsystem ID.
*/
static int dell_cable(struct ata_port *ap) {
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
return ATA_CBL_PATA80;
return ATA_CBL_PATA40;
}
/**
* sun_cable - Sun Cobalt 'Alpine' cable detection
* @ap: ATA port to do cable select
*
* Cobalt CSB5 IDE hides the 40/80pin in the top two bits of the
* subsystem ID the same as dell. We could use one function but we may
* need to extend the Dell one in future
*/
static int sun_cable(struct ata_port *ap) {
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
if (pdev->subsystem_device & (1 << (ap->port_no + 14)))
return ATA_CBL_PATA80;
return ATA_CBL_PATA40;
}
/**
* osb4_cable - OSB4 cable detect
* @ap: ATA port to check
*
* The OSB4 isn't UDMA66 capable so this is easy
*/
static int osb4_cable(struct ata_port *ap) {
return ATA_CBL_PATA40;
}
/**
* csb_cable - CSB5/6 cable detect
* @ap: ATA port to check
*
* Serverworks default arrangement is to use the drive side detection
* only.
*/
static int csb_cable(struct ata_port *ap) {
return ATA_CBL_PATA_UNK;
}
struct sv_cable_table {
int device;
int subvendor;
int (*cable_detect)(struct ata_port *ap);
};
/*
* Note that we don't copy the old serverworks code because the old
* code contains obvious mistakes
*/
static struct sv_cable_table cable_detect[] = {
{ PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_DELL, dell_cable },
{ PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_VENDOR_ID_DELL, dell_cable },
{ PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_VENDOR_ID_SUN, sun_cable },
{ PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, osb4_cable },
{ PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, csb_cable },
{ PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, csb_cable },
{ PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, csb_cable },
{ PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, csb_cable },
{ }
};
/**
* serverworks_cable_detect - cable detection
* @ap: ATA port
* @deadline: deadline jiffies for the operation
*
* Perform cable detection according to the device and subvendor
* identifications
*/
static int serverworks_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
struct sv_cable_table *cb = cable_detect;
while(cb->device) {
if (cb->device == pdev->device &&
(cb->subvendor == pdev->subsystem_vendor ||
cb->subvendor == PCI_ANY_ID)) {
return cb->cable_detect(ap);
}
cb++;
}
BUG();
return -1; /* kill compiler warning */
}
/**
* serverworks_is_csb - Check for CSB or OSB
* @pdev: PCI device to check
*
* Returns true if the device being checked is known to be a CSB
* series device.
*/
static u8 serverworks_is_csb(struct pci_dev *pdev)
{
switch (pdev->device) {
case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
return 1;
default:
break;
}
return 0;
}
/**
* serverworks_osb4_filter - mode selection filter
* @adev: ATA device
* @mask: Mask of proposed modes
*
* Filter the offered modes for the device to apply controller
* specific rules. OSB4 requires no UDMA for disks due to a FIFO
* bug we hit.
*/
static unsigned long serverworks_osb4_filter(struct ata_device *adev, unsigned long mask)
{
if (adev->class == ATA_DEV_ATA)
mask &= ~ATA_MASK_UDMA;
return ata_pci_default_filter(adev, mask);
}
/**
* serverworks_csb_filter - mode selection filter
* @adev: ATA device
* @mask: Mask of proposed modes
*
* Check the blacklist and disable UDMA5 if matched
*/
static unsigned long serverworks_csb_filter(struct ata_device *adev, unsigned long mask)
{
const char *p;
char model_num[ATA_ID_PROD_LEN + 1];
int i;
/* Disk, UDMA */
if (adev->class != ATA_DEV_ATA)
return ata_pci_default_filter(adev, mask);
/* Actually do need to check */
ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
for (i = 0; (p = csb_bad_ata100[i]) != NULL; i++) {
if (!strcmp(p, model_num))
mask &= ~(0xE0 << ATA_SHIFT_UDMA);
}
return ata_pci_default_filter(adev, mask);
}
/**
* serverworks_set_piomode - set initial PIO mode data
* @ap: ATA interface
* @adev: ATA device
*
* Program the OSB4/CSB5 timing registers for PIO. The PIO register
* load is done as a simple lookup.
*/
static void serverworks_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
static const u8 pio_mode[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
int offset = 1 + 2 * ap->port_no - adev->devno;
int devbits = (2 * ap->port_no + adev->devno) * 4;
u16 csb5_pio;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int pio = adev->pio_mode - XFER_PIO_0;
pci_write_config_byte(pdev, 0x40 + offset, pio_mode[pio]);
/* The OSB4 just requires the timing but the CSB series want the
mode number as well */
if (serverworks_is_csb(pdev)) {
pci_read_config_word(pdev, 0x4A, &csb5_pio);
csb5_pio &= ~(0x0F << devbits);
pci_write_config_byte(pdev, 0x4A, csb5_pio | (pio << devbits));
}
}
/**
* serverworks_set_dmamode - set initial DMA mode data
* @ap: ATA interface
* @adev: ATA device
*
* Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
* chipset. The MWDMA mode values are pulled from a lookup table
* while the chipset uses mode number for UDMA.
*/
static void serverworks_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
static const u8 dma_mode[] = { 0x77, 0x21, 0x20 };
int offset = 1 + 2 * ap->port_no - adev->devno;
int devbits = 2 * ap->port_no + adev->devno;
u8 ultra;
u8 ultra_cfg;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
pci_read_config_byte(pdev, 0x54, &ultra_cfg);
pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);
ultra &= ~(0x0F << (adev->devno * 4));
if (adev->dma_mode >= XFER_UDMA_0) {
pci_write_config_byte(pdev, 0x44 + offset, 0x20);
ultra |= (adev->dma_mode - XFER_UDMA_0)
<< (adev->devno * 4);
ultra_cfg |= (1 << devbits);
} else {
pci_write_config_byte(pdev, 0x44 + offset,
dma_mode[adev->dma_mode - XFER_MW_DMA_0]);
ultra_cfg &= ~(1 << devbits);
}
pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);
pci_write_config_byte(pdev, 0x54, ultra_cfg);
}
static struct scsi_host_template serverworks_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
static struct ata_port_operations serverworks_osb4_port_ops = {
.inherits = &ata_bmdma_port_ops,
.cable_detect = serverworks_cable_detect,
.mode_filter = serverworks_osb4_filter,
.set_piomode = serverworks_set_piomode,
.set_dmamode = serverworks_set_dmamode,
};
static struct ata_port_operations serverworks_csb_port_ops = {
.inherits = &serverworks_osb4_port_ops,
.mode_filter = serverworks_csb_filter,
};
static int serverworks_fixup_osb4(struct pci_dev *pdev)
{
u32 reg;
struct pci_dev *isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
if (isa_dev) {
pci_read_config_dword(isa_dev, 0x64, &reg);
reg &= ~0x00002000; /* disable 600ns interrupt mask */
if (!(reg & 0x00004000))
printk(KERN_DEBUG DRV_NAME ": UDMA not BIOS enabled.\n");
reg |= 0x00004000; /* enable UDMA/33 support */
pci_write_config_dword(isa_dev, 0x64, reg);
pci_dev_put(isa_dev);
return 0;
}
printk(KERN_WARNING "ata_serverworks: Unable to find bridge.\n");
return -ENODEV;
}
static int serverworks_fixup_csb(struct pci_dev *pdev)
{
u8 btr;
/* Third Channel Test */
if (!(PCI_FUNC(pdev->devfn) & 1)) {
struct pci_dev * findev = NULL;
u32 reg4c = 0;
findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
if (findev) {
pci_read_config_dword(findev, 0x4C, &reg4c);
reg4c &= ~0x000007FF;
reg4c |= 0x00000040;
reg4c |= 0x00000020;
pci_write_config_dword(findev, 0x4C, reg4c);
pci_dev_put(findev);
}
} else {
struct pci_dev * findev = NULL;
u8 reg41 = 0;
findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
if (findev) {
pci_read_config_byte(findev, 0x41, &reg41);
reg41 &= ~0x40;
pci_write_config_byte(findev, 0x41, reg41);
pci_dev_put(findev);
}
}
/* setup the UDMA Control register
*
* 1. clear bit 6 to enable DMA
* 2. enable DMA modes with bits 0-1
* 00 : legacy
* 01 : udma2
* 10 : udma2/udma4
* 11 : udma2/udma4/udma5
*/
pci_read_config_byte(pdev, 0x5A, &btr);
btr &= ~0x40;
if (!(PCI_FUNC(pdev->devfn) & 1))
btr |= 0x2;
else
btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
pci_write_config_byte(pdev, 0x5A, btr);
return btr;
}
static void serverworks_fixup_ht1000(struct pci_dev *pdev)
{
u8 btr;
/* Setup HT1000 SouthBridge Controller - Single Channel Only */
pci_read_config_byte(pdev, 0x5A, &btr);
btr &= ~0x40;
btr |= 0x3;
pci_write_config_byte(pdev, 0x5A, btr);
}
static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
static const struct ata_port_info info[4] = {
{ /* OSB4 */
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = 0x07,
.port_ops = &serverworks_osb4_port_ops
}, { /* OSB4 no UDMA */
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = 0x00,
.port_ops = &serverworks_osb4_port_ops
}, { /* CSB5 */
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = ATA_UDMA4,
.port_ops = &serverworks_csb_port_ops
}, { /* CSB5 - later revisions*/
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = ATA_UDMA5,
.port_ops = &serverworks_csb_port_ops
}
};
const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
int rc;
rc = pcim_enable_device(pdev);
if (rc)
return rc;
/* Force master latency timer to 64 PCI clocks */
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
/* OSB4 : South Bridge and IDE */
if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
/* Select non UDMA capable OSB4 if we can't do fixups */
if ( serverworks_fixup_osb4(pdev) < 0)
ppi[0] = &info[1];
}
/* setup CSB5/CSB6 : South Bridge and IDE option RAID */
else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
(pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
(pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
/* If the returned btr is the newer revision then
select the right info block */
if (serverworks_fixup_csb(pdev) == 3)
ppi[0] = &info[3];
/* Is this the 3rd channel CSB6 IDE ? */
if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)
ppi[1] = &ata_dummy_port_info;
}
/* setup HT1000E */
else if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
serverworks_fixup_ht1000(pdev);
if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
ata_pci_clear_simplex(pdev);
return ata_pci_init_one(pdev, ppi, &serverworks_sht, NULL);
}
#ifdef CONFIG_PM
static int serverworks_reinit_one(struct pci_dev *pdev)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
int rc;
rc = ata_pci_device_do_resume(pdev);
if (rc)
return rc;
/* Force master latency timer to 64 PCI clocks */
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
switch (pdev->device) {
case PCI_DEVICE_ID_SERVERWORKS_OSB4IDE:
serverworks_fixup_osb4(pdev);
break;
case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
ata_pci_clear_simplex(pdev);
/* fall through */
case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
serverworks_fixup_csb(pdev);
break;
case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
serverworks_fixup_ht1000(pdev);
break;
}
ata_host_resume(host);
return 0;
}
#endif
static const struct pci_device_id serverworks[] = {
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE), 0},
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE), 2},
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE), 2},
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2), 2},
{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 2},
{ },
};
static struct pci_driver serverworks_pci_driver = {
.name = DRV_NAME,
.id_table = serverworks,
.probe = serverworks_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
.resume = serverworks_reinit_one,
#endif
};
static int __init serverworks_init(void)
{
return pci_register_driver(&serverworks_pci_driver);
}
static void __exit serverworks_exit(void)
{
pci_unregister_driver(&serverworks_pci_driver);
}
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, serverworks);
MODULE_VERSION(DRV_VERSION);
module_init(serverworks_init);
module_exit(serverworks_exit);
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