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[PATCH] hpt36x: Suspend/resume support 

Another chipset which needs some reconfiguration after a resume. All the
chip setup is moved to a new function called in both setup and resume.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
hifive-unleashed-5.1
Alan 2006-11-27 16:24:15 +00:00 committed by Jeff Garzik
parent 627d2d3261
commit aa54ab1eff
1 changed files with 35 additions and 14 deletions
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49
drivers/ata/pata_hpt366.c
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@ -27,7 +27,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_hpt366"
#define DRV_VERSION "0.5.1"
#define DRV_VERSION "0.5.3"
struct hpt_clock {
u8 xfer_speed;
@ -339,6 +339,8 @@ static struct scsi_host_template hpt36x_sht = {
.slave_configure = ata_scsi_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
.resume = ata_scsi_device_resume,
.suspend = ata_scsi_device_suspend,
};
/*
@ -380,6 +382,27 @@ static struct ata_port_operations hpt366_port_ops = {
.host_stop = ata_host_stop
};
/**
* hpt36x_init_chipset - common chip setup
* @dev: PCI device
*
* Perform the chip setup work that must be done at both init and
* resume time
*/
static void hpt36x_init_chipset(struct pci_dev *dev)
{
u8 drive_fast;
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
pci_read_config_byte(dev, 0x51, &drive_fast);
if (drive_fast & 0x80)
pci_write_config_byte(dev, 0x51, drive_fast & ~0x80);
}
/**
* hpt36x_init_one - Initialise an HPT366/368
* @dev: PCI device
@ -415,7 +438,6 @@ static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
u32 class_rev;
u32 reg1;
u8 drive_fast;
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
class_rev &= 0xFF;
@ -425,14 +447,7 @@ static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
if (class_rev > 2)
return -ENODEV;
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
pci_read_config_byte(dev, 0x51, &drive_fast);
if (drive_fast & 0x80)
pci_write_config_byte(dev, 0x51, drive_fast & ~0x80);
hpt36x_init_chipset(dev);
pci_read_config_dword(dev, 0x40, &reg1);
@ -453,9 +468,15 @@ static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
return ata_pci_init_one(dev, port_info, 2);
}
static int hpt36x_reinit_one(struct pci_dev *dev)
{
hpt36x_init_chipset(dev);
return ata_pci_device_resume(dev);
}
static const struct pci_device_id hpt36x[] = {
{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366), },
{ },
};
@ -463,7 +484,9 @@ static struct pci_driver hpt36x_pci_driver = {
.name = DRV_NAME,
.id_table = hpt36x,
.probe = hpt36x_init_one,
.remove = ata_pci_remove_one
.remove = ata_pci_remove_one,
.suspend = ata_pci_device_suspend,
.resume = hpt36x_reinit_one,
};
static int __init hpt36x_init(void)
@ -471,13 +494,11 @@ static int __init hpt36x_init(void)
return pci_register_driver(&hpt36x_pci_driver);
}
static void __exit hpt36x_exit(void)
{
pci_unregister_driver(&hpt36x_pci_driver);
}
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for the Highpoint HPT366/368");
MODULE_LICENSE("GPL");