return spd_str[spd - 1];
}
-static int ata_dev_set_dipm(struct ata_device *dev, enum ata_lpm_policy policy)
-{
- struct ata_link *link = dev->link;
- struct ata_port *ap = link->ap;
- u32 scontrol;
- unsigned int err_mask;
- int rc;
-
- /*
- * disallow DIPM for drivers which haven't set
- * ATA_FLAG_LPM. This is because when DIPM is enabled,
- * phy ready will be set in the interrupt status on
- * state changes, which will cause some drivers to
- * think there are errors - additionally drivers will
- * need to disable hot plug.
- */
- if (!(ap->flags & ATA_FLAG_LPM) || !ata_dev_enabled(dev)) {
- ap->lpm_policy = ATA_LPM_UNKNOWN;
- return -EINVAL;
- }
-
- /*
- * For DIPM, we will only enable it for the
- * min_power setting.
- *
- * Why? Because Disks are too stupid to know that
- * If the host rejects a request to go to SLUMBER
- * they should retry at PARTIAL, and instead it
- * just would give up. So, for medium_power to
- * work at all, we need to only allow HIPM.
- */
- rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
- if (rc)
- return rc;
-
- switch (policy) {
- case ATA_LPM_MIN_POWER:
- /* no restrictions on LPM transitions */
- scontrol &= ~(0x3 << 8);
- rc = sata_scr_write(link, SCR_CONTROL, scontrol);
- if (rc)
- return rc;
-
- /* enable DIPM */
- if (dev->flags & ATA_DFLAG_DIPM)
- err_mask = ata_dev_set_feature(dev,
- SETFEATURES_SATA_ENABLE, SATA_DIPM);
- break;
- case ATA_LPM_MED_POWER:
- /* allow LPM to PARTIAL */
- scontrol &= ~(0x1 << 8);
- scontrol |= (0x2 << 8);
- rc = sata_scr_write(link, SCR_CONTROL, scontrol);
- if (rc)
- return rc;
-
- /*
- * we don't have to disable DIPM since LPM flags
- * disallow transitions to SLUMBER, which effectively
- * disable DIPM if it does not support PARTIAL
- */
- break;
- case ATA_LPM_UNKNOWN:
- case ATA_LPM_MAX_POWER:
- /* disable all LPM transitions */
- scontrol |= (0x3 << 8);
- rc = sata_scr_write(link, SCR_CONTROL, scontrol);
- if (rc)
- return rc;
-
- /*
- * we don't have to disable DIPM since LPM flags
- * disallow all transitions which effectively
- * disable DIPM anyway.
- */
- break;
- }
-
- /* FIXME: handle SET FEATURES failure */
- (void) err_mask;
-
- return 0;
-}
-
-/**
- * ata_dev_enable_pm - enable SATA interface power management
- * @dev: device to enable power management
- * @policy: the link power management policy
- *
- * Enable SATA Interface power management. This will enable
- * Device Interface Power Management (DIPM) for min_power
- * policy, and then call driver specific callbacks for
- * enabling Host Initiated Power management.
- *
- * Locking: Caller.
- * Returns: -EINVAL if LPM is not supported, 0 otherwise.
- */
-void ata_dev_enable_pm(struct ata_device *dev, enum ata_lpm_policy policy)
-{
- int rc = 0;
- struct ata_port *ap = dev->link->ap;
-
- /* set HIPM first, then DIPM */
- if (ap->ops->enable_pm)
- rc = ap->ops->enable_pm(ap, policy);
- if (rc)
- goto enable_pm_out;
- rc = ata_dev_set_dipm(dev, policy);
-
-enable_pm_out:
- if (rc)
- ap->lpm_policy = ATA_LPM_MAX_POWER;
- else
- ap->lpm_policy = policy;
- return /* rc */; /* hopefully we can use 'rc' eventually */
-}
-
-#ifdef CONFIG_PM
-/**
- * ata_dev_disable_pm - disable SATA interface power management
- * @dev: device to disable power management
- *
- * Disable SATA Interface power management. This will disable
- * Device Interface Power Management (DIPM) without changing
- * policy, call driver specific callbacks for disabling Host
- * Initiated Power management.
- *
- * Locking: Caller.
- * Returns: void
- */
-static void ata_dev_disable_pm(struct ata_device *dev)
-{
- struct ata_port *ap = dev->link->ap;
-
- ata_dev_set_dipm(dev, ATA_LPM_MAX_POWER);
- if (ap->ops->disable_pm)
- ap->ops->disable_pm(ap);
-}
-#endif /* CONFIG_PM */
-
-void ata_lpm_schedule(struct ata_port *ap, enum ata_lpm_policy policy)
-{
- ap->lpm_policy = policy;
- ap->link.eh_info.action |= ATA_EH_LPM;
- ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
- ata_port_schedule_eh(ap);
-}
-
-#ifdef CONFIG_PM
-static void ata_lpm_enable(struct ata_host *host)
-{
- struct ata_link *link;
- struct ata_port *ap;
- struct ata_device *dev;
- int i;
-
- for (i = 0; i < host->n_ports; i++) {
- ap = host->ports[i];
- ata_for_each_link(link, ap, EDGE) {
- ata_for_each_dev(dev, link, ALL)
- ata_dev_disable_pm(dev);
- }
- }
-}
-
-static void ata_lpm_disable(struct ata_host *host)
-{
- int i;
-
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
- ata_lpm_schedule(ap, ap->lpm_policy);
- }
-}
-#endif /* CONFIG_PM */
-
/**
* ata_dev_classify - determine device type based on ATA-spec signature
* @tf: ATA taskfile register set for device to be identified
if (dev->flags & ATA_DFLAG_LBA48)
dev->max_sectors = ATA_MAX_SECTORS_LBA48;
- if (!(dev->horkage & ATA_HORKAGE_LPM)) {
- if (ata_id_has_hipm(dev->id))
- dev->flags |= ATA_DFLAG_HIPM;
- if (ata_id_has_dipm(dev->id))
- dev->flags |= ATA_DFLAG_DIPM;
- }
-
/* Limit PATA drive on SATA cable bridge transfers to udma5,
200 sectors */
if (ata_dev_knobble(dev)) {
dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
dev->max_sectors);
- if (ata_dev_blacklisted(dev) & ATA_HORKAGE_LPM) {
- dev->horkage |= ATA_HORKAGE_LPM;
-
- /* reset link pm_policy for this port to no pm */
- ap->lpm_policy = ATA_LPM_MAX_POWER;
- }
-
if (ap->ops->dev_config)
ap->ops->dev_config(dev);
unsigned int ehi_flags = ATA_EHI_QUIET;
int rc;
- /*
- * disable link pm on all ports before requesting
- * any pm activity
- */
- ata_lpm_enable(host);
-
/*
* On some hardware, device fails to respond after spun down
* for suspend. As the device won't be used before being
ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
host->dev->power.power_state = PMSG_ON;
-
- /* reenable link pm */
- ata_lpm_disable(host);
}
#endif
spin_lock_irqsave(ap->lock, flags);
ehi->probe_mask |= ATA_ALL_DEVICES;
- ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
+ ehi->action |= ATA_EH_RESET;
ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
ap->pflags &= ~ATA_PFLAG_INITIALIZING;
projects / linux-2.6-microblaze.git / blobdiff