leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
fccb6ea5c2
linux/drivers/ata/pata_ali.c
Auke Kok 44c10138fd PCI: Change all drivers to use pci_device->revision 
Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.

This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.

In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.

Compile tested with make all{yes,mod}config on x86_64 and i386.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11 16:02:10 -07:00

660 lines
17 KiB
C
Raw Blame History

/*
* pata_ali.c - ALI 15x3 PATA for new ATA layer
* (C) 2005 Red Hat Inc
* Alan Cox <alan@redhat.com>
*
* based in part upon
* linux/drivers/ide/pci/alim15x3.c Version 0.17 2003/01/02
*
* Copyright (C) 1998-2000 Michel Aubry, Maintainer
* Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
* Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
*
* Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
* May be copied or modified under the terms of the GNU General Public License
* Copyright (C) 2002 Alan Cox <alan@redhat.com>
* ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
*
* Documentation
* Chipset documentation available under NDA only
*
* TODO/CHECK
* Cannot have ATAPI on both master & slave for rev < c2 (???) but
* otherwise should do atapi DMA.
*/
#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>
#include <linux/dmi.h>
#define DRV_NAME "pata_ali"
#define DRV_VERSION "0.7.4"
/*
* Cable special cases
*/
static struct dmi_system_id cable_dmi_table[] = {
{
.ident = "HP Pavilion N5430",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_BOARD_NAME, "OmniBook N32N-736"),
},
},
{ }
};
static int ali_cable_override(struct pci_dev *pdev)
{
/* Fujitsu P2000 */
if (pdev->subsystem_vendor == 0x10CF && pdev->subsystem_device == 0x10AF)
return 1;
/* Systems by DMI */
if (dmi_check_system(cable_dmi_table))
return 1;
return 0;
}
/**
* ali_c2_cable_detect - cable detection
* @ap: ATA port
*
* Perform cable detection for C2 and later revisions
*/
static int ali_c2_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 ata66;
/* Certain laptops use short but suitable cables and don't
implement the detect logic */
if (ali_cable_override(pdev))
return ATA_CBL_PATA40_SHORT;
/* Host view cable detect 0x4A bit 0 primary bit 1 secondary
Bit set for 40 pin */
pci_read_config_byte(pdev, 0x4A, &ata66);
if (ata66 & (1 << ap->port_no))
return ATA_CBL_PATA40;
else
return ATA_CBL_PATA80;
}
/**
* ali_20_filter - filter for earlier ALI DMA
* @ap: ALi ATA port
* @adev: attached device
*
* Ensure that we do not do DMA on CD devices. We may be able to
* fix that later on. Also ensure we do not do UDMA on WDC drives
*/
static unsigned long ali_20_filter(struct ata_device *adev, unsigned long mask)
{
char model_num[ATA_ID_PROD_LEN + 1];
/* No DMA on anything but a disk for now */
if (adev->class != ATA_DEV_ATA)
mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
if (strstr(model_num, "WDC"))
return mask &= ~ATA_MASK_UDMA;
return ata_pci_default_filter(adev, mask);
}
/**
* ali_fifo_control - FIFO manager
* @ap: ALi channel to control
* @adev: device for FIFO control
* @on: 0 for off 1 for on
*
* Enable or disable the FIFO on a given device. Because of the way the
* ALi FIFO works it provides a boost on ATA disk but can be confused by
* ATAPI and we must therefore manage it.
*/
static void ali_fifo_control(struct ata_port *ap, struct ata_device *adev, int on)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int pio_fifo = 0x54 + ap->port_no;
u8 fifo;
int shift = 4 * adev->devno;
/* ATA - FIFO on set nibble to 0x05, ATAPI - FIFO off, set nibble to
0x00. Not all the docs agree but the behaviour we now use is the
one stated in the BIOS Programming Guide */
pci_read_config_byte(pdev, pio_fifo, &fifo);
fifo &= ~(0x0F << shift);
if (on)
fifo |= (on << shift);
pci_write_config_byte(pdev, pio_fifo, fifo);
}
/**
* ali_program_modes - load mode registers
* @ap: ALi channel to load
* @adev: Device the timing is for
* @cmd: Command timing
* @data: Data timing
* @ultra: UDMA timing or zero for off
*
* Loads the timing registers for cmd/data and disable UDMA if
* ultra is zero. If ultra is set then load and enable the UDMA
* timing but do not touch the command/data timing.
*/
static void ali_program_modes(struct ata_port *ap, struct ata_device *adev, struct ata_timing *t, u8 ultra)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
int cas = 0x58 + 4 * ap->port_no; /* Command timing */
int cbt = 0x59 + 4 * ap->port_no; /* Command timing */
int drwt = 0x5A + 4 * ap->port_no + adev->devno; /* R/W timing */
int udmat = 0x56 + ap->port_no; /* UDMA timing */
int shift = 4 * adev->devno;
u8 udma;
if (t != NULL) {
t->setup = FIT(t->setup, 1, 8) & 7;
t->act8b = FIT(t->act8b, 1, 8) & 7;
t->rec8b = FIT(t->rec8b, 1, 16) & 15;
t->active = FIT(t->active, 1, 8) & 7;
t->recover = FIT(t->recover, 1, 16) & 15;
pci_write_config_byte(pdev, cas, t->setup);
pci_write_config_byte(pdev, cbt, (t->act8b << 4) | t->rec8b);
pci_write_config_byte(pdev, drwt, (t->active << 4) | t->recover);
}
/* Set up the UDMA enable */
pci_read_config_byte(pdev, udmat, &udma);
udma &= ~(0x0F << shift);
udma |= ultra << shift;
pci_write_config_byte(pdev, udmat, udma);
}
/**
* ali_set_piomode - set initial PIO mode data
* @ap: ATA interface
* @adev: ATA device
*
* Program the ALi registers for PIO mode. FIXME: add timings for
* PIO5.
*/
static void ali_set_piomode(struct ata_port *ap, struct ata_device *adev)
{
struct ata_device *pair = ata_dev_pair(adev);
struct ata_timing t;
unsigned long T = 1000000000 / 33333; /* PCI clock based */
ata_timing_compute(adev, adev->pio_mode, &t, T, 1);
if (pair) {
struct ata_timing p;
ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
if (pair->dma_mode) {
ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
}
}
/* PIO FIFO is only permitted on ATA disk */
if (adev->class != ATA_DEV_ATA)
ali_fifo_control(ap, adev, 0x00);
ali_program_modes(ap, adev, &t, 0);
if (adev->class == ATA_DEV_ATA)
ali_fifo_control(ap, adev, 0x05);
}
/**
* ali_set_dmamode - set initial DMA mode data
* @ap: ATA interface
* @adev: ATA device
*
* FIXME: MWDMA timings
*/
static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
struct ata_device *pair = ata_dev_pair(adev);
struct ata_timing t;
unsigned long T = 1000000000 / 33333; /* PCI clock based */
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
if (adev->class == ATA_DEV_ATA)
ali_fifo_control(ap, adev, 0x08);
if (adev->dma_mode >= XFER_UDMA_0) {
ali_program_modes(ap, adev, NULL, udma_timing[adev->dma_mode - XFER_UDMA_0]);
if (adev->dma_mode >= XFER_UDMA_3) {
u8 reg4b;
pci_read_config_byte(pdev, 0x4B, &reg4b);
reg4b |= 1;
pci_write_config_byte(pdev, 0x4B, reg4b);
}
} else {
ata_timing_compute(adev, adev->dma_mode, &t, T, 1);
if (pair) {
struct ata_timing p;
ata_timing_compute(pair, pair->pio_mode, &p, T, 1);
ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
if (pair->dma_mode) {
ata_timing_compute(pair, pair->dma_mode, &p, T, 1);
ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT);
}
}
ali_program_modes(ap, adev, &t, 0);
}
}
/**
* ali_lock_sectors - Keep older devices to 255 sector mode
* @adev: Device
*
* Called during the bus probe for each device that is found. We use
* this call to lock the sector count of the device to 255 or less on
* older ALi controllers. If we didn't do this then large I/O's would
* require LBA48 commands which the older ALi requires are issued by
* slower PIO methods
*/
static void ali_lock_sectors(struct ata_device *adev)
{
adev->max_sectors = 255;
}
static struct scsi_host_template ali_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,
};
/*
* Port operations for PIO only ALi
*/
static struct ata_port_operations ali_early_port_ops = {
.port_disable = ata_port_disable,
.set_piomode = ali_set_piomode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.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,
};
/*
* Port operations for DMA capable ALi without cable
* detect
*/
static struct ata_port_operations ali_20_port_ops = {
.port_disable = ata_port_disable,
.set_piomode = ali_set_piomode,
.set_dmamode = ali_set_dmamode,
.mode_filter = ali_20_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,
.dev_config = ali_lock_sectors,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.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,
.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,
};
/*
* Port operations for DMA capable ALi with cable detect
*/
static struct ata_port_operations ali_c2_port_ops = {
.port_disable = ata_port_disable,
.set_piomode = ali_set_piomode,
.set_dmamode = ali_set_dmamode,
.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,
.dev_config = ali_lock_sectors,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ali_c2_cable_detect,
.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,
.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,
};
/*
* Port operations for DMA capable ALi with cable detect and LBA48
*/
static struct ata_port_operations ali_c5_port_ops = {
.port_disable = ata_port_disable,
.set_piomode = ali_set_piomode,
.set_dmamode = ali_set_dmamode,
.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 = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ali_c2_cable_detect,
.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,
.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,
};
/**
* ali_init_chipset - chip setup function
* @pdev: PCI device of ATA controller
*
* Perform the setup on the device that must be done both at boot
* and at resume time.
*/
static void ali_init_chipset(struct pci_dev *pdev)
{
u8 tmp;
struct pci_dev *north, *isa_bridge;
/*
* The chipset revision selects the driver operations and
* mode data.
*/
if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
/* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
pci_read_config_byte(pdev, 0x4B, &tmp);
/* Clear CD-ROM DMA write bit */
tmp &= 0x7F;
pci_write_config_byte(pdev, 0x4B, tmp);
} else if (pdev->revision >= 0xC2) {
/* Enable cable detection logic */
pci_read_config_byte(pdev, 0x4B, &tmp);
pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
}
north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
if (north && north->vendor == PCI_VENDOR_ID_AL && isa_bridge) {
/* Configure the ALi bridge logic. For non ALi rely on BIOS.
Set the south bridge enable bit */
pci_read_config_byte(isa_bridge, 0x79, &tmp);
if (pdev->revision == 0xC2)
pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04);
else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
}
if (pdev->revision >= 0x20) {
/*
* CD_ROM DMA on (0x53 bit 0). Enable this even if we want
* to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
* via 0x54/55.
*/
pci_read_config_byte(pdev, 0x53, &tmp);
if (pdev->revision <= 0x20)
tmp &= ~0x02;
if (pdev->revision >= 0xc7)
tmp |= 0x03;
else
tmp |= 0x01; /* CD_ROM enable for DMA */
pci_write_config_byte(pdev, 0x53, tmp);
}
pci_dev_put(isa_bridge);
pci_dev_put(north);
ata_pci_clear_simplex(pdev);
}
/**
* ali_init_one - discovery callback
* @pdev: PCI device ID
* @id: PCI table info
*
* An ALi IDE interface has been discovered. Figure out what revision
* and perform configuration work before handing it to the ATA layer
*/
static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
static const struct ata_port_info info_early = {
.sht = &ali_sht,
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.port_ops = &ali_early_port_ops
};
/* Revision 0x20 added DMA */
static const struct ata_port_info info_20 = {
.sht = &ali_sht,
.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.port_ops = &ali_20_port_ops
};
/* Revision 0x20 with support logic added UDMA */
static const struct ata_port_info info_20_udma = {
.sht = &ali_sht,
.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = 0x07, /* UDMA33 */
.port_ops = &ali_20_port_ops
};
/* Revision 0xC2 adds UDMA66 */
static const struct ata_port_info info_c2 = {
.sht = &ali_sht,
.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = ATA_UDMA4,
.port_ops = &ali_c2_port_ops
};
/* Revision 0xC3 is UDMA66 for now */
static const struct ata_port_info info_c3 = {
.sht = &ali_sht,
.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = ATA_UDMA4,
.port_ops = &ali_c2_port_ops
};
/* Revision 0xC4 is UDMA100 */
static const struct ata_port_info info_c4 = {
.sht = &ali_sht,
.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_PIO_LBA48,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = ATA_UDMA5,
.port_ops = &ali_c2_port_ops
};
/* Revision 0xC5 is UDMA133 with LBA48 DMA */
static const struct ata_port_info info_c5 = {
.sht = &ali_sht,
.flags = ATA_FLAG_SLAVE_POSS,
.pio_mask = 0x1f,
.mwdma_mask = 0x07,
.udma_mask = ATA_UDMA6,
.port_ops = &ali_c5_port_ops
};
const struct ata_port_info *ppi[] = { NULL, NULL };
u8 tmp;
struct pci_dev *isa_bridge;
/*
* The chipset revision selects the driver operations and
* mode data.
*/
if (pdev->revision < 0x20) {
ppi[0] = &info_early;
} else if (pdev->revision < 0xC2) {
ppi[0] = &info_20;
} else if (pdev->revision == 0xC2) {
ppi[0] = &info_c2;
} else if (pdev->revision == 0xC3) {
ppi[0] = &info_c3;
} else if (pdev->revision == 0xC4) {
ppi[0] = &info_c4;
} else
ppi[0] = &info_c5;
ali_init_chipset(pdev);
isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
/* Are we paired with a UDMA capable chip */
pci_read_config_byte(isa_bridge, 0x5E, &tmp);
if ((tmp & 0x1E) == 0x12)
ppi[0] = &info_20_udma;
pci_dev_put(isa_bridge);
}
return ata_pci_init_one(pdev, ppi);
}
#ifdef CONFIG_PM
static int ali_reinit_one(struct pci_dev *pdev)
{
ali_init_chipset(pdev);
return ata_pci_device_resume(pdev);
}
#endif
static const struct pci_device_id ali[] = {
{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), },
{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), },
{ },
};
static struct pci_driver ali_pci_driver = {
.name = DRV_NAME,
.id_table = ali,
.probe = ali_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
.resume = ali_reinit_one,
#endif
};
static int __init ali_init(void)
{
return pci_register_driver(&ali_pci_driver);
}
static void __exit ali_exit(void)
{
pci_unregister_driver(&ali_pci_driver);
}
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for ALi PATA");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, ali);
MODULE_VERSION(DRV_VERSION);
module_init(ali_init);
module_exit(ali_exit);
Reference in New Issue View Git Blame Copy Permalink