linux-toradex.git/drivers/ata/ahci_platform.c, branch v3.4.2

ata: ahci_platform: Add synopsys ahci controller in DT's compatible list

2012-05-03T18:08:53+00:00

SPEAr13xx series of SoCs contain Synopsys AHCI SATA Controller which shares
ahci_platform driver with other controller versions.

This patch updates DT compatible list for ahci_platform. It also updates and
renames binding documentation to more generic name.

Signed-off-by: Viresh Kumar 
Cc: Rob Herring 
Signed-off-by: Jeff Garzik

ahci_platform: add STRICT_AHCI platform type

2012-03-13T20:36:18+00:00

Some platforms need to make use of the AHCI_HFLAG_DELAY_ENGINE flag.

Signed-off-by: Brian Norris 
Signed-off-by: Jeff Garzik 
Cc: stable@kernel.org

ahci: platform support for suspend/resume

2012-01-09T00:14:59+00:00

Add platform hooks for custom suspend() and resume() functions. The
generic suspend/resume code in drivers/ata/ahci_platform.c is adapted
from the PCI version in drivers/ata/ahci.c.

Signed-off-by: Brian Norris 
Signed-off-by: Jeff Garzik

[libata] ahci_platform: fix DT probing

2011-11-17T07:10:49+00:00

The change in commit 904c04feaf13ed "ahci_platform: Add the board_ids..."
doesn't work for the DT probing case as platform_get_device_id returns
NULL. Pick the default ahci_port_info in this case.

Signed-off-by: Rob Herring 
Acked-by: Anton Vorontsov 
Cc: Richard Zhu 
Cc: linux-ide@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Jeff Garzik

ahci_platform: use dev_get_platdata()

2011-11-09T06:36:00+00:00

Use dev_get_platdata() to retrieve the struct ahci_platform_data data
from the platform.

Signed-off-by: JiSheng Zhang 
Signed-off-by: Jeff Garzik

ahci: add DT binding for Calxeda AHCI controller

2011-11-03T20:52:38+00:00

Add devicetree match table to ahci platform driver for Calxeda Highbank
AHCI controller.

Signed-off-by: Rob Herring 
Acked-by: Grant Likely 
Cc: Jeff Garzik 
Cc: linux-ide@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org

[libata] ahci_platform: Add the board_ids and pi refer to different features

2011-10-08T04:07:15+00:00

On imx53 AHCI, soft reset fails with IPMS set when PMP
is enabled but SATA HDD/ODD is connected to SATA port,
do soft reset again to port 0.
So the 'ahci_pmp_retry_srst_ops' is required when imx53
ahci is present.

Signed-off-by: Richard Zhu 
Acked-by: Eric Miao 
Signed-off-by: Jeff Garzik

libata: reimplement link power management

2010-10-22T00:21:04+00:00

The current LPM implementation has the following issues.

* Operation order isn't well thought-out.  e.g. HIPM should be
  configured after IPM in SControl is properly configured.  Not the
  other way around.

* Suspend/resume paths call ata_lpm_enable/disable() which must only
  be called from EH context directly.  Also, ata_lpm_enable/disable()
  were called whether LPM was in use or not.

* Implementation is per-port when it should be per-link.  As a result,
  it can't be used for controllers with slave links or PMP.

* LPM state isn't managed consistently.  After a link reset for
  whatever reason including suspend/resume the actual LPM state would
  be reset leaving ap->lpm_policy inconsistent.

* Generic/driver-specific logic boundary isn't clear.  Currently,
  libahci has to mangle stuff which libata EH proper should be
  handling.  This makes the implementation unnecessarily complex and
  fragile.

* Tied to ALPM.  Doesn't consider DIPM only cases and doesn't check
  whether the device allows HIPM.

* Error handling isn't implemented.

Given the extent of mismatch with the rest of libata, I don't think
trying to fix it piecewise makes much sense.  This patch reimplements
LPM support.

* The new implementation is per-link.  The target policy is still
  port-wide (ap->target_lpm_policy) but all the mechanisms and states
  are per-link and integrate well with the rest of link abstraction
  and can work with slave and PMP links.

* Core EH has proper control of LPM state.  LPM state is reconfigured
  when and only when reconfiguration is necessary.  It makes sure that
  LPM state is reset when probing for new device on the link.
  Controller agnostic logic is now implemented in libata EH proper and
  driver implementation only has to deal with controller specifics.

* Proper error handling.  LPM config failure is attributed to the
  device on the link and LPM is disabled for the link if it fails
  repeatedly.

* ops->enable/disable_pm() are replaced with single ops->set_lpm()
  which takes @policy and @hints.  This simplifies driver specific
  implementation.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: clean up lpm related symbols and sysfs show/store functions

2010-10-22T00:21:04+00:00

Link power management related symbols are in confusing state w/ mixed
usages of lpm, ipm and pm.  This patch cleans up lpm related symbols
and sysfs show/store functions as follows.

* lpm states - NOT_AVAILABLE, MIN_POWER, MAX_PERFORMANCE and
  MEDIUM_POWER are renamed to ATA_LPM_UNKNOWN and
  ATA_LPM_{MIN|MAX|MED}_POWER.

* Pre/postfixes are unified to lpm.

* sysfs show/store functions for link_power_management_policy were
  curiously named get/put and unnecessarily complex.  Renamed to
  show/store and simplified.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

ahci: fix module refcount breakage introduced by libahci split

2010-09-28T19:14:51+00:00

libata depends on scsi_host_template for module reference counting and
sht's should be owned by each low level driver.  During libahci split,
the sht was left with libahci.ko leaving the actual low level drivers
not reference counted.  This made ahci and ahci_platform always
unloadable even while they're being actively used.

Fix it by defining AHCI_SHT() macro in ahci.h and defining a sht for
each low level ahci driver.

stable: only applicable to 2.6.35.

Signed-off-by: Tejun Heo 
Reported-by: Pedro Francisco 
Tested-by: Michael Tokarev 
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik