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pata_artop: add Power Management support 

Fixes IDE -> libata regression.

There shouldn't be any problems with it as corresponding IDE's host
driver (aec62xx) has been supporting PCI Power Management since
Oct 10 2008 (commit feb22b7f "ide: add proper PCI PM support (v2)")
and IDE PM since Jun 14 2003 (patch v2.5.73 "ide: Power Management").

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
hifive-unleashed-5.1
Bartlomiej Zolnierkiewicz 2011-10-13 12:59:35 +02:00 committed by Jeff Garzik
parent 81452182be
commit 067f8c7b49
1 changed files with 54 additions and 27 deletions
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81
drivers/ata/pata_artop.c
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@ -2,7 +2,7 @@
* pata_artop.c - ARTOP ATA controller driver
*
* (C) 2006 Red Hat
* (C) 2007 Bartlomiej Zolnierkiewicz
* (C) 2007,2011 Bartlomiej Zolnierkiewicz
*
* Based in part on drivers/ide/pci/aec62xx.c
* Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org>
@ -28,7 +28,7 @@
#include <linux/ata.h>
#define DRV_NAME "pata_artop"
#define DRV_VERSION "0.4.5"
#define DRV_VERSION "0.4.6"
/*
* The ARTOP has 33 Mhz and "over clocked" timing tables. Until we
@ -313,6 +313,33 @@ static struct ata_port_operations artop6260_ops = {
.prereset = artop62x0_pre_reset,
};
static void atp8xx_fixup(struct pci_dev *pdev)
{
if (pdev->device == 0x0005)
/* BIOS may have left us in UDMA, clear it before libata probe */
pci_write_config_byte(pdev, 0x54, 0);
else if (pdev->device == 0x0008 || pdev->device == 0x0009) {
u8 reg;
/* Mac systems come up with some registers not set as we
will need them */
/* Clear reset & test bits */
pci_read_config_byte(pdev, 0x49, &reg);
pci_write_config_byte(pdev, 0x49, reg & ~0x30);
/* PCI latency must be > 0x80 for burst mode, tweak it
* if required.
*/
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &reg);
if (reg <= 0x80)
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90);
/* Enable IRQ output and burst mode */
pci_read_config_byte(pdev, 0x4a, &reg);
pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);
}
}
/**
* artop_init_one - Register ARTOP ATA PCI device with kernel services
@ -367,42 +394,22 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
if (rc)
return rc;
if (id->driver_data == 0) { /* 6210 variant */
if (id->driver_data == 0) /* 6210 variant */
ppi[0] = &info_6210;
/* BIOS may have left us in UDMA, clear it before libata probe */
pci_write_config_byte(pdev, 0x54, 0);
}
else if (id->driver_data == 1) /* 6260 */
ppi[0] = &info_626x;
else if (id->driver_data == 2) { /* 6280 or 6280 + fast */
unsigned long io = pci_resource_start(pdev, 4);
u8 reg;
ppi[0] = &info_628x;
if (inb(io) & 0x10)
ppi[0] = &info_628x_fast;
/* Mac systems come up with some registers not set as we
will need them */
/* Clear reset & test bits */
pci_read_config_byte(pdev, 0x49, &reg);
pci_write_config_byte(pdev, 0x49, reg & ~ 0x30);
/* PCI latency must be > 0x80 for burst mode, tweak it
* if required.
*/
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &reg);
if (reg <= 0x80)
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90);
/* Enable IRQ output and burst mode */
pci_read_config_byte(pdev, 0x4a, &reg);
pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80);
}
BUG_ON(ppi[0] == NULL);
atp8xx_fixup(pdev);
return ata_pci_bmdma_init_one(pdev, ppi, &artop_sht, NULL, 0);
}
@ -416,11 +423,32 @@ static const struct pci_device_id artop_pci_tbl[] = {
{ } /* terminate list */
};
#ifdef CONFIG_PM
static int atp8xx_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;
atp8xx_fixup(pdev);
ata_host_resume(host);
return 0;
}
#endif
static struct pci_driver artop_pci_driver = {
.name = DRV_NAME,
.id_table = artop_pci_tbl,
.probe = artop_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
.resume = atp8xx_reinit_one,
#endif
};
static int __init artop_init(void)
@ -436,9 +464,8 @@ static void __exit artop_exit(void)
module_init(artop_init);
module_exit(artop_exit);
MODULE_AUTHOR("Alan Cox");
MODULE_AUTHOR("Alan Cox, Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, artop_pci_tbl);
MODULE_VERSION(DRV_VERSION);