diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/scsi/ata_piix.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/libata-core.c | 114 | ||||
| -rw-r--r-- | drivers/scsi/libata-scsi.c | 16 | ||||
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 31 |
5 files changed, 170 insertions, 5 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 4c42065dea8..3c606cf8c8c 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -914,7 +914,7 @@ config SCSI_INIA100 config SCSI_PPA tristate "IOMEGA parallel port (ppa - older drives)" - depends on SCSI && PARPORT + depends on SCSI && PARPORT_PC ---help--- This driver supports older versions of IOMEGA's parallel port ZIP drive (a 100 MB removable media device). @@ -941,7 +941,7 @@ config SCSI_PPA config SCSI_IMM tristate "IOMEGA parallel port (imm - newer drives)" - depends on SCSI && PARPORT + depends on SCSI && PARPORT_PC ---help--- This driver supports newer versions of IOMEGA's parallel port ZIP drive (a 100 MB removable media device). @@ -968,7 +968,7 @@ config SCSI_IMM config SCSI_IZIP_EPP16 bool "ppa/imm option - Use slow (but safe) EPP-16" - depends on PARPORT && (SCSI_PPA || SCSI_IMM) + depends on SCSI_PPA || SCSI_IMM ---help--- EPP (Enhanced Parallel Port) is a standard for parallel ports which allows them to act as expansion buses that can handle up to 64 @@ -983,7 +983,7 @@ config SCSI_IZIP_EPP16 config SCSI_IZIP_SLOW_CTR bool "ppa/imm option - Assume slow parport control register" - depends on PARPORT && (SCSI_PPA || SCSI_IMM) + depends on SCSI_PPA || SCSI_IMM help Some parallel ports are known to have excessive delays between changing the parallel port control register and good data being @@ -1815,7 +1815,7 @@ config SCSI_SUNESP config ZFCP tristate "FCP host bus adapter driver for IBM eServer zSeries" - depends on ARCH_S390 && QDIO && SCSI + depends on S390 && QDIO && SCSI select SCSI_FC_ATTRS help If you want to access SCSI devices attached to your IBM eServer diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 4b647eefc9a..557788ec4ee 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -166,6 +166,8 @@ static struct pci_driver piix_pci_driver = { .id_table = piix_pci_tbl, .probe = piix_init_one, .remove = ata_pci_remove_one, + .suspend = ata_pci_device_suspend, + .resume = ata_pci_device_resume, }; static struct scsi_host_template piix_sht = { @@ -185,6 +187,8 @@ static struct scsi_host_template piix_sht = { .dma_boundary = ATA_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .bios_param = ata_std_bios_param, + .resume = ata_scsi_device_resume, + .suspend = ata_scsi_device_suspend, }; static const struct ata_port_operations piix_pata_ops = { diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index bdfb0a88cd6..f55b9b3f7b3 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -4173,6 +4173,96 @@ err_out: * Inherited from caller. */ +/* + * Execute a 'simple' command, that only consists of the opcode 'cmd' itself, + * without filling any other registers + */ +static int ata_do_simple_cmd(struct ata_port *ap, struct ata_device *dev, + u8 cmd) +{ + struct ata_taskfile tf; + int err; + + ata_tf_init(ap, &tf, dev->devno); + + tf.command = cmd; + tf.flags |= ATA_TFLAG_DEVICE; + tf.protocol = ATA_PROT_NODATA; + + err = ata_exec_internal(ap, dev, &tf, DMA_NONE, NULL, 0); + if (err) + printk(KERN_ERR "%s: ata command failed: %d\n", + __FUNCTION__, err); + + return err; +} + +static int ata_flush_cache(struct ata_port *ap, struct ata_device *dev) +{ + u8 cmd; + + if (!ata_try_flush_cache(dev)) + return 0; + + if (ata_id_has_flush_ext(dev->id)) + cmd = ATA_CMD_FLUSH_EXT; + else + cmd = ATA_CMD_FLUSH; + + return ata_do_simple_cmd(ap, dev, cmd); +} + +static int ata_standby_drive(struct ata_port *ap, struct ata_device *dev) +{ + return ata_do_simple_cmd(ap, dev, ATA_CMD_STANDBYNOW1); +} + +static int ata_start_drive(struct ata_port *ap, struct ata_device *dev) +{ + return ata_do_simple_cmd(ap, dev, ATA_CMD_IDLEIMMEDIATE); +} + +/** + * ata_device_resume - wakeup a previously suspended devices + * + * Kick the drive back into action, by sending it an idle immediate + * command and making sure its transfer mode matches between drive + * and host. + * + */ +int ata_device_resume(struct ata_port *ap, struct ata_device *dev) +{ + if (ap->flags & ATA_FLAG_SUSPENDED) { + ap->flags &= ~ATA_FLAG_SUSPENDED; + ata_set_mode(ap); + } + if (!ata_dev_present(dev)) + return 0; + if (dev->class == ATA_DEV_ATA) + ata_start_drive(ap, dev); + + return 0; +} + +/** + * ata_device_suspend - prepare a device for suspend + * + * Flush the cache on the drive, if appropriate, then issue a + * standbynow command. + * + */ +int ata_device_suspend(struct ata_port *ap, struct ata_device *dev) +{ + if (!ata_dev_present(dev)) + return 0; + if (dev->class == ATA_DEV_ATA) + ata_flush_cache(ap, dev); + + ata_standby_drive(ap, dev); + ap->flags |= ATA_FLAG_SUSPENDED; + return 0; +} + int ata_port_start (struct ata_port *ap) { struct device *dev = ap->host_set->dev; @@ -4921,6 +5011,23 @@ int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) return (tmp == bits->val) ? 1 : 0; } + +int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state) +{ + pci_save_state(pdev); + pci_disable_device(pdev); + pci_set_power_state(pdev, PCI_D3hot); + return 0; +} + +int ata_pci_device_resume(struct pci_dev *pdev) +{ + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + pci_enable_device(pdev); + pci_set_master(pdev); + return 0; +} #endif /* CONFIG_PCI */ @@ -5024,4 +5131,11 @@ EXPORT_SYMBOL_GPL(ata_pci_host_stop); EXPORT_SYMBOL_GPL(ata_pci_init_native_mode); EXPORT_SYMBOL_GPL(ata_pci_init_one); EXPORT_SYMBOL_GPL(ata_pci_remove_one); +EXPORT_SYMBOL_GPL(ata_pci_device_suspend); +EXPORT_SYMBOL_GPL(ata_pci_device_resume); #endif /* CONFIG_PCI */ + +EXPORT_SYMBOL_GPL(ata_device_suspend); +EXPORT_SYMBOL_GPL(ata_device_resume); +EXPORT_SYMBOL_GPL(ata_scsi_device_suspend); +EXPORT_SYMBOL_GPL(ata_scsi_device_resume); diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 2c644cbb6e9..cfbceb50471 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -396,6 +396,22 @@ void ata_dump_status(unsigned id, struct ata_taskfile *tf) } } +int ata_scsi_device_resume(struct scsi_device *sdev) +{ + struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0]; + struct ata_device *dev = &ap->device[sdev->id]; + + return ata_device_resume(ap, dev); +} + +int ata_scsi_device_suspend(struct scsi_device *sdev) +{ + struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0]; + struct ata_device *dev = &ap->device[sdev->id]; + + return ata_device_suspend(ap, dev); +} + /** * ata_to_sense_error - convert ATA error to SCSI error * @id: ATA device number diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index 15842b1f0f4..ea7f3a43357 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -263,9 +263,40 @@ static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; } +static int scsi_bus_suspend(struct device * dev, pm_message_t state) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_host_template *sht = sdev->host->hostt; + int err; + + err = scsi_device_quiesce(sdev); + if (err) + return err; + + if (sht->suspend) + err = sht->suspend(sdev); + + return err; +} + +static int scsi_bus_resume(struct device * dev) +{ + struct scsi_device *sdev = to_scsi_device(dev); + struct scsi_host_template *sht = sdev->host->hostt; + int err = 0; + + if (sht->resume) + err = sht->resume(sdev); + + scsi_device_resume(sdev); + return err; +} + struct bus_type scsi_bus_type = { .name = "scsi", .match = scsi_bus_match, + .suspend = scsi_bus_suspend, + .resume = scsi_bus_resume, }; int scsi_sysfs_register(void) |