diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-25 17:08:28 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-25 17:08:28 -0800 |
commit | 2ba14a017a4ba8d2266316f481d4ad7400073d18 (patch) | |
tree | 6e86dcbbb7898eb747f1198e33961eb68bfcdb4d /drivers/ata/libata-acpi.c | |
parent | 99f1c97dbdb30e958edfd1ced0ae43df62504e07 (diff) | |
parent | a984f58dd97f22f5113700322fed311a0ee29947 (diff) |
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: (67 commits)
fix drivers/ata/sata_fsl.c double-decl
[libata] Prefer SCSI_SENSE_BUFFERSIZE to sizeof()
pata_legacy: Merge winbond support
ata_generic: Cenatek support
pata_winbond: error return
pata_serverworks: Fix cable types and cosmetics
pata_mpc52xx: remove un-needed assignment
libata: fix off-by-one in error categorization
ahci: factor out AHCI enabling and enable AHCI before reading CAP
ata_piix: implement SIDPR SCR access
ata_piix: convert to prepare - activate initialization
libata: factor out ata_pci_activate_sff_host() from ata_pci_one()
[libata] Prefer SCSI_SENSE_BUFFERSIZE to sizeof()
pata_legacy: resychronize with upstream changes and resubmit
[libata] pata_legacy: typo fix
[libata] pata_winbond: update for new ->data_xfer hook
pata_pcmcia: convert to new data_xfer prototype
libata annotations and fixes
libata: use dev_driver_string() instead of "libata" in libata-sff.c
ata_piix: kill unused constants and flags
...
Diffstat (limited to 'drivers/ata/libata-acpi.c')
-rw-r--r-- | drivers/ata/libata-acpi.c | 117 |
1 files changed, 92 insertions, 25 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 7bf4befd96b..9e8ec19260a 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -442,40 +442,77 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf) } /** + * ata_acpi_gtm_xfermode - determine xfermode from GTM parameter + * @dev: target device + * @gtm: GTM parameter to use + * + * Determine xfermask for @dev from @gtm. + * + * LOCKING: + * None. + * + * RETURNS: + * Determined xfermask. + */ +unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev, + const struct ata_acpi_gtm *gtm) +{ + unsigned long xfer_mask = 0; + unsigned int type; + int unit; + u8 mode; + + /* we always use the 0 slot for crap hardware */ + unit = dev->devno; + if (!(gtm->flags & 0x10)) + unit = 0; + + /* PIO */ + mode = ata_timing_cycle2mode(ATA_SHIFT_PIO, gtm->drive[unit].pio); + xfer_mask |= ata_xfer_mode2mask(mode); + + /* See if we have MWDMA or UDMA data. We don't bother with + * MWDMA if UDMA is available as this means the BIOS set UDMA + * and our error changedown if it works is UDMA to PIO anyway. + */ + if (!(gtm->flags & (1 << (2 * unit)))) + type = ATA_SHIFT_MWDMA; + else + type = ATA_SHIFT_UDMA; + + mode = ata_timing_cycle2mode(type, gtm->drive[unit].dma); + xfer_mask |= ata_xfer_mode2mask(mode); + + return xfer_mask; +} +EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask); + +/** * ata_acpi_cbl_80wire - Check for 80 wire cable * @ap: Port to check + * @gtm: GTM data to use * - * Return 1 if the ACPI mode data for this port indicates the BIOS selected - * an 80wire mode. + * Return 1 if the @gtm indicates the BIOS selected an 80wire mode. */ - -int ata_acpi_cbl_80wire(struct ata_port *ap) +int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm) { - const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap); - int valid = 0; + struct ata_device *dev; - if (!gtm) - return 0; + ata_link_for_each_dev(dev, &ap->link) { + unsigned long xfer_mask, udma_mask; + + if (!ata_dev_enabled(dev)) + continue; + + xfer_mask = ata_acpi_gtm_xfermask(dev, gtm); + ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask); + + if (udma_mask & ~ATA_UDMA_MASK_40C) + return 1; + } - /* Split timing, DMA enabled */ - if ((gtm->flags & 0x11) == 0x11 && gtm->drive[0].dma < 55) - valid |= 1; - if ((gtm->flags & 0x14) == 0x14 && gtm->drive[1].dma < 55) - valid |= 2; - /* Shared timing, DMA enabled */ - if ((gtm->flags & 0x11) == 0x01 && gtm->drive[0].dma < 55) - valid |= 1; - if ((gtm->flags & 0x14) == 0x04 && gtm->drive[0].dma < 55) - valid |= 2; - - /* Drive check */ - if ((valid & 1) && ata_dev_enabled(&ap->link.device[0])) - return 1; - if ((valid & 2) && ata_dev_enabled(&ap->link.device[1])) - return 1; return 0; } - EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire); static void ata_acpi_gtf_to_tf(struct ata_device *dev, @@ -776,6 +813,36 @@ void ata_acpi_on_resume(struct ata_port *ap) } /** + * ata_acpi_set_state - set the port power state + * @ap: target ATA port + * @state: state, on/off + * + * This function executes the _PS0/_PS3 ACPI method to set the power state. + * ACPI spec requires _PS0 when IDE power on and _PS3 when power off + */ +void ata_acpi_set_state(struct ata_port *ap, pm_message_t state) +{ + struct ata_device *dev; + + if (!ap->acpi_handle || (ap->flags & ATA_FLAG_ACPI_SATA)) + return; + + /* channel first and then drives for power on and vica versa + for power off */ + if (state.event == PM_EVENT_ON) + acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D0); + + ata_link_for_each_dev(dev, &ap->link) { + if (dev->acpi_handle && ata_dev_enabled(dev)) + acpi_bus_set_power(dev->acpi_handle, + state.event == PM_EVENT_ON ? + ACPI_STATE_D0 : ACPI_STATE_D3); + } + if (state.event != PM_EVENT_ON) + acpi_bus_set_power(ap->acpi_handle, ACPI_STATE_D3); +} + +/** * ata_acpi_on_devcfg - ATA ACPI hook called on device donfiguration * @dev: target ATA device * |