Commit Graph

156 Commits

Author SHA1 Message Date
Tony Lindgren 68d9f95d6f usb: musb: Fix suspend and resume issues for PHYs on I2C and SPI
As the USB PHYs typically are on I2C or SPI bus for the 2430 glue layer,
we need configure the PHYs early for suspend.

The musb glue layer we need to suspend only after musb_suspend() in
suspend_late.

Fixes: 62d472d8ad ("usb: musb: Add missing PM suspend and resume functions for 2430 glue")
Reported-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210727104134.52800-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-07-27 16:31:02 +02:00
Tony Lindgren 62d472d8ad usb: musb: Add missing PM suspend and resume functions for 2430 glue
Looks like we are missing suspend and resume functions for pm_ops that
are needed to idle the hardware for system suspend for 2430 glue layer.

We can rely on the driver internal PM runtime state, and call driver
functions to idle the hardware on suspend if needed. There is no need
to add a dependency to PM runtime for system suspend here.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210518074449.17070-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-21 14:07:16 +02:00
Gustavo A. R. Silva df561f6688 treewide: Use fallthrough pseudo-keyword
Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2020-08-23 17:36:59 -05:00
Tony Lindgren 98827105d8 usb: musb: Get rid of omap2430_musb_set_vbus()
Now that we've removed direct calls from interrupt handler to
omap2430_musb_set_vbus(), let's make things less confusing and
configure VBUS directly in omap_musb_set_mailbox().

We have omap_musb_set_mailbox() called from the PHYs, and that's
all we need.

Note that we can now also drop the check for MUSB_INTERFACE_UTMI,
we've been already calling otg_set_vbus(musb->xceiv->otg, 0)
unconditionally via omap2430_musb_set_vbus() and we should only
need to call it once.

And we want to disable VBUS unconditionally on disconnect even
without musb->gadget_driver, so let's drop that check too.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-11-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-15 14:46:56 +01:00
Tony Lindgren 8b359cbc3c usb: musb: omap2430: Idle musb on init
We want to configure musb state in omap2430_musb_enable() instead of
omap2430_musb_init(). Otherwise musb may not idle properly until
USB cable has been connected at least once.

And we already have omap_musb_set_mailbox() configure mode with
omap_control_usb_set_mode() so we can remove those calls from
omap2430_musb_enable().

Cc: Jacopo Mondi <jacopo@jmondi.org>
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Michael Scott <hashcode0f@gmail.com>
Cc: NeKit <nekit1000@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Sebastian Reichel <sre@kernel.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-10-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-15 14:46:56 +01:00
Tony Lindgren b769ae4f26 usb: musb: omap2430: Clean up enable and remove devctl tinkering
There should be no need to tinker with devctl in enable in the SoC glue
code. We have musb_start() to take care of handling it already.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-9-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-15 14:46:55 +01:00
Tony Lindgren 93dc256871 usb: musb: Add musb_set_host and peripheral and use them for omap2430
At least some revisions of musb core need to set devctl session bit
in peripheral mode to force musb to host mode. And we have places
clearing the devctl session bit.

Let's add a generic function to do this, and use it for omap2430.
This should get us a bit closer to completely removing devctl register
tinkering in the SoC glue code.

Before making use of this code for the other glue layers, things need
to be tested carefully as there may be a approximately a 200 ms delay
needed between powering up musb and calling musb_set_host() to avoid.
Otherwise the system hangs at least with omap2430 glue layer.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
[b-liu@ti.com: fixed "line over 80 characters" warning]
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-8-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-15 14:46:55 +01:00
Tony Lindgren 15f1122f92 usb: musb: omap2430: Handle multiple ID ground interrupts
We currently get "unhandled DISCONNECT transition" warnings from musb core
on device disconnect as things are wrongly set to OTG_STATE_A_IDLE in
host mode when enumerating devices. We can also get "Failed to write reg
index" errors after enumerating.

This is happening at least with cpcap phy where we get multiple ID ground
interrupts. Looks like it's VBUS keeps timing out and needs to be kicked
when the phy sends multiple ID ground interrupts during host mode.

Cc: Jacopo Mondi <jacopo@jmondi.org>
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Michael Scott <hashcode0f@gmail.com>
Cc: NeKit <nekit1000@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Sebastian Reichel <sre@kernel.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-7-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-15 14:46:55 +01:00
Tony Lindgren ce3ab6503e usb: musb: omap2430: Wait on enable to avoid babble
We can get babble interrupt if we attempt to switch to USB host mode too
soon after enabling musb. Let's fix the issue by waiting a bit in
runtime_resume.

Cc: Jacopo Mondi <jacopo@jmondi.org>
Cc: Marcel Partap <mpartap@gmx.net>
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Michael Scott <hashcode0f@gmail.com>
Cc: NeKit <nekit1000@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Sebastian Reichel <sre@kernel.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-6-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-15 14:46:55 +01:00
Tony Lindgren 91b6dec32e usb: musb: omap2430: Get rid of musb .set_vbus for omap2430 glue
We currently have musb_set_vbus() called from two different paths. Mostly
it gets called from the USB PHY via omap_musb_set_mailbox(), but in some
cases it can get also called from musb_stage0_irq() rather via .set_vbus:

(musb_set_host [musb_hdrc])
(omap2430_musb_set_vbus [omap2430])
(musb_stage0_irq [musb_hdrc])
(musb_interrupt [musb_hdrc])
(omap2430_musb_interrupt [omap2430])

This is racy and will not work with introducing generic helper functions
for musb_set_host() and musb_set_peripheral(). We want to get rid of the
busy loops in favor of usleep_range().

Let's just get rid of .set_vbus for omap2430 glue layer and let the PHY
code handle VBUS with musb_set_vbus(). Note that in the follow-up patch
we can completely remove omap2430_musb_set_vbus(), but let's do it in a
separate patch as this change may actually turn out to be needed as a
fix.

Reported-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-5-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-15 14:46:54 +01:00
Tony Lindgren 10ac7e7757 usb: musb: omap2430: Add support for idling phy when musb is idle
I noticed that musb is blocking core retention for omap4 unlike for
omap3. This is because for omap3 we have phy-twl4030-usb implement
it's own PM runtime to handle errata "VUSB3V1 VBUS overvoltage
debouncer not working when the PHY is powered down". That is done
in order to keep the USB PHY powered when phy-twl4030-usb is loaded.

For the other USB PHYs, we need to enable and disable the PHY based on
musb PM runtime. With the session bit based PM runtime for musb core,
we can now idle the USB PHY always when musb is idle.

Note that adding these calls will not affect the twl4030 driver
as it's phy functions will just query the PHY state without powering
the PHY on or off.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-30 17:55:08 +02:00
Bin Liu d2852f2d3e usb: musb: remove references to default_a of struct usb_otg
musb drivers do not use the otg fsm framework, so referencing to
otg->default_a doesn't have any effect, so remove the references.

But tusb6010 glue driver uses it locally to control the vbus power, so
keep the references in tusb6010 only.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-22 12:03:25 +02:00
Johan Hovold 5ee1787e5e USB: musb: omap2430: drop non-DT support
Drop support for non-DT systems, which hasn't been used by a mainline
kernel since commit 9080b8dc76 ("ARM: OMAP2+: Remove legacy usb-host.c
platform init code"). Specifically, since that commit usb_get_phy_dev()
have always returned -ENODEV when looking up a legacy phy, something
which in turn would have led to the init callback returning
-EPROBE_DEFER indefinitely.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-22 15:58:23 +02:00
Greg Kroah-Hartman 21b650c236 USB: musb: Remove redundant license text
Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Acked-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-07 15:45:01 +01:00
Greg Kroah-Hartman 5fd54ace47 USB: add SPDX identifiers to all remaining files in drivers/usb/
It's good to have SPDX identifiers in all files to make it easier to
audit the kernel tree for correct licenses.

Update the drivers/usb/ and include/linux/usb* files with the correct
SPDX license identifier based on the license text in the file itself.
The SPDX identifier is a legally binding shorthand, which can be used
instead of the full boiler plate text.

This work is based on a script and data from Thomas Gleixner, Philippe
Ombredanne, and Kate Stewart.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-04 11:48:02 +01:00
Bhumika Goyal c0927fea6a usb: musb: omap2430: constify dev_pm_ops structures
Declare dev_pm_ops structures as const as they are only stored in the pm
field of a device_driver structure. This field is of type const, so
dev_pm_ops structures having similar properties can be declared const
too.

Size details after cross compiling the .o file for arm
architecture.

File size before: drivers/usb/musb/omap2430.o
   text	   data	    bss	    dec	    hex	filename
   4141	    400	      8	   4549	   11c5	usb/musb/omap2430.o

File size after: drivers/usb/musb/omap2430.o
   text	   data	    bss	    dec	    hex	filename
   4333	    200	      8	   4541	   11bd	usb/musb/omap2430.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
[b-liu@ti.com: added omap2430 in commit subject prefix]
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-03 10:05:11 +01:00
Greg Kroah-Hartman 0edbf9e552 Merge 4.9-rc7 into usb-next
We want the USB fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-28 08:34:10 +01:00
Ladislav Michl dc66ba8d9b usb: musb: omap2430: make complain on -EPROBE_DEFER dev_dbg
There is no point having this complaint to be dev_err as it is just adding
noise to bootlog.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-21 17:35:36 +01:00
Ladislav Michl 71127a7962 usb: musb: omap2430: use dev_err
Replace pr_err with dev_err to print also device name.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-21 17:35:36 +01:00
Tony Lindgren 536d599d4a usb: musb: Add missing pm_runtime_disable and drop 2430 PM timeout
We are missing pm_runtime_disable() in 2430 glue layer. Further,
we only need to enable PM runtime and disable it on exit. With
musb_core.c doing PM, the glue layer as a parent will always be
active when musb_core.c is active.

This fixes host enumeration issues with some devices as reported
by Ladislav Michl <ladis@linux-mips.org>.

And holding an RPM reference while deregistering the child would
lead to a crash in omap2430_runtime_suspend() which dereferences
the now freed child's driver data on put as pointed out by
Johan Hovold <johan@kernel.org>:

Unable to handle kernel paging request at virtual address 6b6b6f17
...
[<c05453d4>] (omap2430_runtime_suspend) from [<c0481410>]
 (pm_generic_runtime_suspend+0x3c/0x48)
[<c0481410>] (pm_generic_runtime_suspend) from [<c0121028>]
 (_od_runtime_suspend+0x1c/0x30)
[<c0121028>] (_od_runtime_suspend) from [<c04833b0>] (__rpm_callback+0x3c/0x70)
[<c04833b0>] (__rpm_callback) from [<c0483414>] (rpm_callback+0x30/0x90)
[<c0483414>] (rpm_callback) from [<c0483984>] (rpm_suspend+0x118/0x6b4)
[<c0483984>] (rpm_suspend) from [<c04840f4>] (rpm_idle+0x104/0x440)
[<c04840f4>] (rpm_idle) from [<c04844ac>] (__pm_runtime_idle+0x7c/0xb0)
[<c04844ac>] (__pm_runtime_idle) from [<c0545458>] (omap2430_remove+0x38/0x58)
[<c0545458>] (omap2430_remove) from [<c047b2bc>] (platform_drv_remove+0x34/0x4c)

Note that if changes are needed to the autosuspend timeout, it should
be done in musb_core.c.

Reported-by: Ladislav Michl <ladis@linux-mips.org>
Fixes: 87326e8584 ("usb: musb: Remove extra PM runtime calls from
2430 glue layer")
Tested-by: Ladislav Michl <ladis@linux-mips.org>
Reviewed-by: Johan Hovold <johan@kernel.org>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-17 16:25:39 +01:00
Tony Lindgren d8e5f0eca1 usb: musb: Fix hardirq-safe hardirq-unsafe lock order error
If we configure musb with 2430 glue as a peripheral, and then rmmod
omap2430 module, we'll get the following error:

[ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
...
rmmod/413 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
 (&phy->mutex){+.+.+.}, at: [<c04b9fd0>] phy_power_off+0x1c/0xb8
[  204.678710]
               and this task is already holding:
 (&(&musb->lock)->rlock){-.-...}, at: [<bf3a482c>]
 musb_gadget_stop+0x24/0xec [musb_hdrc]
which would create a new lock dependency:
 (&(&musb->lock)->rlock){-.-...} -> (&phy->mutex){+.+.+.}
...

This is because some glue layers expect musb_platform_enable/disable
to be called with spinlock held, and 2430 glue layer has USB PHY on
the I2C bus using a mutex.

We could fix the glue layers to take the spinlock, but we still have
a problem of musb_plaform_enable/disable being called in an unbalanced
manner. So that would still lead into USB PHY enable/disable related
problems for omap2430 glue layer.

While it makes sense to only enable USB PHY when needed from PM point
of view, in this case we just can't do it yet without breaking things.
So let's just revert phy_enable/disable related changes instead and
reconsider this after we have fixed musb_platform_enable/disable to
be balanced.

Fixes: a83e17d0f7 ("usb: musb: Improve PM runtime and phy handling for 2430 glue layer")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-24 14:29:08 +02:00
Tony Lindgren ae909fe4f4 usb: musb: Simplify PM runtime for 2430 glue layer
With musb core now blocking PM based on the devctl status
bit, we can remove related quirks from the 2430 glue layer
and simplify PM runtime further.

Lets's also use musb->controller instead of dev to make it
clear we make the PM runtime calls for the core, not the
glue layer.

And we can now also lower the autoidle timeout.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-13 17:20:02 +02:00
Tony Lindgren aec373c1e5 usb: musb: Use normal module_init for 2430 glue
There's no longer any need for custom initcall level for
musb.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren 87326e8584 usb: musb: Remove extra PM runtime calls from 2430 glue layer
With PM runtime behaving, these are all now unnecessary.
Doing pm_runtime_get(musb->controller) will keep the parent
glue layer also active.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren 12b7db2bf8 usb: musb: Return error value from musb_mailbox
At least on n900 we have phy-twl4030-usb only generating cable
interrupts, and then have a separate USB PHY.

In order for musb to know the real cable status, we need to
clear any cached state until musb is ready. Otherwise the cable
status interrupts will get just ignored if the status does
not change from the initial state.

To do this, let's add a return value to musb_mailbox(), and
reset cached linkstat to MUSB_UNKNOWN on error. Sorry to cause
a bit of churn here, I should have added that already last time
patching musb_mailbox().

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren a118df07f5 usb: musb: Don't set d+ high before enable for 2430 glue layer
At least 2430 glue layer pulls d+ high on start up even if there are
no gadgets configured. This is bad at least for anything using a separate
battery charger chip as it can confuse the charger detection.

Let's fix the issue by removing the bogus glue layer code tinkering
with the SESSION bit. As pointed out Bin Liu <b-liu@ti.com> and
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>, the SESSION
bit just starts host mode if ID pin is grounded, and starts the
srp is ID pin is floating. So without the ID pin changing, it's
unable to force musb mode to anything. And just for starting a
host mode, things work fine without this code.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren 4dc2fe7a94 usb: musb: Remove try_idle for 2430 glue layer
This is no longer needed with PM runtime at least for 2430 glue.
We can now rely only on PM runtime and cable detection.

The other glue layers can probably remove try_idle too, but that
needs to be tested for each platform before doing it.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren a83e17d0f7 usb: musb: Improve PM runtime and phy handling for 2430 glue layer
This simplifies things and allows idling both MUSB and PHY
when nothing is configured. Let's just return early from PM
runtime if musb is not yet initialized.

Let's also warn if PHY is not configured.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren 21f77beece usb: musb: Handle cable status better for 2430 glue layer
We may have drivers loaded but no configured gadgets and MUSB may be in
host mode. If gadgets are configured during host mode, PM runtime will
get confused.

Disable PM runtime from gadget state, and do it based on the cable
and last state.

Note that we may get multiple cable events, so we need to keep track
of the power state.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren f730f205cc usb: musb: Split PM runtime between wrapper IP and musb core
Let's not tinker with the PM runtime of musb core from the omap2430
wrapper. This allows us to initialize PM runtime for musb core later
on instead of doing it in stages. And omap2430 wrapper has no need
to for accessing musb core at this point.

Note that this does not remove all the PM runtime calls from the
glue layer, those will get removed in a later patch.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren 7099dbc5b3 usb: musb: Update to use PM runtime autosuspend
Let's make the PM runtime use the standard autosuspend calls.
Commit 5de85b9d57 ("PM / runtime: Re-init runtime PM states at probe
error and driver unbind") means we must pair use_autosuspend with
dont_use_autosuspend and then use put_sync to properly idle the
device.

Note that we'll be removing the PM runtime calls from the glue
layer to the MUSB core in the next patch. And we can also remove
the pointless FIXME comment now.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-06-01 14:58:59 -07:00
Tony Lindgren 03e43528ab usb: musb: Fix unbalanced pm_runtime_enable
When reloading omap2430 kernel module we get a warning about
unbalanced pm_runtime_enable. Let's fix this. Note that we
need to do this after the child musb-core platform_device is
removed because of pm_runtime_irq_safe being set at the child.

Cc: Bin Liu <b-liu@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: NeilBrown <neil@brown.name>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-12-16 10:07:28 -06:00
Tony Lindgren 8055555fc4 usb: musb: core: Fix handling of the phy notifications
We currently can't unload omap2430 MUSB platform glue driver module and
this cause issues for fixing the MUSB code further. The reason we can't
remove omap2430 is because it uses the PHY functions and also exports the
omap_musb_mailbox function that some PHY drivers are using.

Let's fix the issue by exporting a more generic musb_mailbox function
from the MUSB core and allow platform glue layers to register phy_callback
function as needed.

And now we can now also get rid of the include/linux/musb-omap.h.

Cc: Bin Liu <b-liu@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: NeilBrown <neil@brown.name>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-12-16 10:07:28 -06:00
Tony Lindgren 8f2279d5d9 usb: musb: omap2430: Fix regression caused by driver core change
Commit ddef08dd00 ("Driver core: wakeup the parent device before trying
probe") started automatically ensuring the parent device is enabled when
the child gets probed.

This however caused a regression for MUSB omap2430 interface as the
runtime PM for the parent device needs the child initialized to access
the MUSB hardware registers.

Let's delay the enabling of PM runtime for the parent until the child
has been properly initialized as suggested in an earlier patch by
Grygorii Strashko <grygorii.strashko@ti.com>.

In addition to delaying pm_runtime_enable, we now also need to make sure
the parent is enabled during omap2430_musb_init. We also want to propagate
an error from omap2430_runtime_resume if struct musb is not initialized.

Note that we use pm_runtime_put_noidle here for both the child and parent
to prevent an extra runtime_suspend/resume cycle.

Let's also add some comments to avoid confusion between the
two different devices.

Fixes: ddef08dd00 ("Driver core: wakeup the parent device before
trying probe")
Suggested-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2015-10-28 10:16:04 -07:00
Tony Lindgren 7f6283ed6f usb: musb: Set up function pointers for DMA
Set up function pointers for DMA so get closer to
being able to build in all the DMA engines.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-05-07 13:35:51 -05:00
Tony Lindgren f8e9f34f80 usb: musb: Fix up DMA related macros
Pass struct musb to tusb_dma_omap() and is_cppi_enabled(),
and add macros for the other DMA controllers. Populate the
platform specific quirks with the DMA type and use it during
runtime.

Note that platform glue layers with no custom DMA code are
tagged with MUSB_DMA_INVENTRA which may have a chance of
working. Looks like the defconfigs for these use PIO_ONLY,
so this should not break existing configs.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-05-07 13:35:46 -05:00
Tony Lindgren 606bf4d5d6 usb: musb: Fix use for of_property_read_bool for disabled multipoint
The value for the multipoint dts property is ignored when parsing with
of_property_read_bool, so we currently have multipoint always set as 1
even if value 0 is specified in the dts file.

Let's fix this to read the value too instead of just the property like
the binding documentation says as otherwise MUSB will fail to work
on devices with Mentor configuration that does not support multipoint.

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-02-23 09:14:30 -06:00
Antoine Tenart e47d92545c usb: move the OTG state from the USB PHY to the OTG structure
Before using the PHY framework instead of the USB PHY one, we need to
move the OTG state into another place, since it won't be available when
USB PHY isn't used. This patch moves the OTG state into the OTG
structure, and makes all the needed modifications in the drivers
using the OTG state.

[ balbi@ti.com : fix build regressions with phy-tahvo.c, musb_dsps.c,
		phy-isp1301-omap, and chipidea's debug.c ]

Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-11-03 10:01:25 -06:00
Sergei Shtylyov 5a8053099c usb: musb: omap2430: use MUSB_DEVCTL_BDEVICE
The OMAP2+ MUSB glue layer still uses a bare number for the DEVCTL.B-Device bit
in one place, while there's #define MUSB_DEVCTL_BDEVICE for that.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-11-03 10:01:19 -06:00
Peter Chen af1bdfc999 usb: musb: omap2430: delete unnecessary 'out of memory' messages
The memory subsystem has already had similar message for it.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-11-03 10:01:03 -06:00
Felipe Balbi 8b2bc2c935 usb: musb: omap2430: make sure clocks are enabled when running mailbox
on early initialization we could fall into
a situation where the mailbox is called before
MUSB's clocks are running, in order to avoid
that, make sure mailbox is always wrapped with
pm_runtime calls.

Reported-by: Stefan Roese <sr@denx.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-04-15 12:08:02 -05:00
Felipe Balbi 3063a12be2 usb: musb: fix PHY power on/off
commi 30a70b0 (usb: musb: fix obex in g_nokia.ko
causing kernel panic) removed phy_power_on()
and phy_power_off() calls from runtime PM callbacks
but it failed to note that the driver depended
on pm_runtime_get_sync() calls to power up the PHY,
thus leaving some platforms without any means to
have a working PHY.

Fix that by enabling the phy during omap2430_musb_init()
and killing it in omap2430_musb_exit().

Fixes: 30a70b0 (usb: musb: fix obex in g_nokia.ko causing kernel panic)
Cc: <stable@vger.kernel.org> # v3.14
Cc: Pali Rohár <pali.rohar@gmail.com>
Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Reported-by: Michael Scott <hashcode0f@gmail.com>
Tested-by: Michael Scott <hashcode0f@gmail.com>
Tested-by: Stefan Roese <sr@denx.de>
Reported-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-04-15 12:07:33 -05:00
Kishon Vijay Abraham I 14da699bc0 phy: rename struct omap_control_usb to struct omap_control_phy
Rename struct omap_control_usb to struct omap_control_phy since it can
be used to control PHY of USB, SATA and PCIE. Also move the driver and
include files under *phy* and made the corresponding changes in the users
of phy-omap-control.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
2014-03-09 12:45:08 +05:30
Felipe Balbi 30a70b026b usb: musb: fix obex in g_nokia.ko causing kernel panic
phy_power_off() can, depending on the PHY being used,
start I2C transactions which shouldn't happen in
atomic context.

Current call to phy_power_off() inside omap2430_runtime
callbacks causes the following dump, as a fix, just don't
power off the PHY in runtime.

[   18.606414] [<c037eac0>] (__schedule+0x5c/0x50c) from [<c037d3bc>] (schedule_timeout+0x1f4/0x25c)
[   18.623809] [<c037d3bc>] (schedule_timeout+0x1f4/0x25c) from [<c037f12c>] (wait_for_common+0xc8/0x1ac)
[   18.649291] [<c037f12c>] (wait_for_common+0xc8/0x1ac) from [<c028c1c0>] (omap_i2c_xfer+0x338/0x488)
[   18.674499] [<c028c1c0>] (omap_i2c_xfer+0x338/0x488) from [<c0288144>] (__i2c_transfer+0x40/0x74)
[   18.692047] [<c0288144>] (__i2c_transfer+0x40/0x74) from [<c0288a2c>] (i2c_transfer+0x6c/0x90)
[   18.709320] [<c0288a2c>] (i2c_transfer+0x6c/0x90) from [<c02351c8>] (regmap_i2c_read+0x48/0x68)
[   18.726715] [<c02351c8>] (regmap_i2c_read+0x48/0x68) from [<c023161c>] (_regmap_raw_read+0x128/0x220)
[   18.752685] [<c023161c>] (_regmap_raw_read+0x128/0x220) from [<c02317b4>] (regmap_raw_read+0xa0/0x130)
[   18.779052] [<c02317b4>] (regmap_raw_read+0xa0/0x130) from [<c023193c>] (regmap_bulk_read+0xf8/0x16c)
[   18.805694] [<c023193c>] (regmap_bulk_read+0xf8/0x16c) from [<c0238ea8>] (twl_i2c_read+0xa4/0xe0)
[   18.823730] [<c0238ea8>] (twl_i2c_read+0xa4/0xe0) from [<c0274d34>] (__twl4030_phy_power.isra.12+0x1c/0x58)
[   18.850921] [<c0274d34>] (__twl4030_phy_power.isra.12+0x1c/0x58) from [<c0274df0>]
(twl4030_phy_power.part.14+0x80/0xc8)
[   18.879699] [<c0274df0>] (twl4030_phy_power.part.14+0x80/0xc8) from [<c0274f9c>]
(twl4030_set_suspend+0x54/0x1e8)
[   18.908325] [<c0274f9c>] (twl4030_set_suspend+0x54/0x1e8) from [<c027c8c4>]
(omap2430_runtime_resume+0x5c/0x64)
[   18.937042] [<c027c8c4>] (omap2430_runtime_resume+0x5c/0x64) from [<c0225dd0>]
(pm_generic_runtime_resume+0x2c/0x38)
[   18.966461] [<c0225dd0>] (pm_generic_runtime_resume+0x2c/0x38) from [<c0229fe0>] (__rpm_callback+0x54/0x80)
[   18.995117] [<c0229fe0>] (__rpm_callback+0x54/0x80) from [<c022a04c>] (rpm_callback+0x40/0x74)
[   19.013610] [<c022a04c>] (rpm_callback+0x40/0x74) from [<c022b3c8>] (rpm_resume+0x448/0x63c)
[   19.031921] [<c022b3c8>] (rpm_resume+0x448/0x63c) from [<c022b2e4>] (rpm_resume+0x364/0x63c)
[   19.050140] [<c022b2e4>] (rpm_resume+0x364/0x63c) from [<c022b874>] (__pm_runtime_resume+0x48/0x74)
[   19.077728] [<c022b874>] (__pm_runtime_resume+0x48/0x74) from [<c027b4fc>] (musb_gadget_pullup+0x1c/0xb4)
[   19.105895] [<c027b4fc>] (musb_gadget_pullup+0x1c/0xb4) from [<bf025c14>] (usb_function_deactivate+0x54/0xa4
[libcomposite])
[   19.135955] [<bf025c14>] (usb_function_deactivate+0x54/0xa4 [libcomposite]) from [<bf05b3b8>]
(obex_bind+0x124/0x1d8 [usb_f_obex])
[   19.166870] [<bf05b3b8>] (obex_bind+0x124/0x1d8 [usb_f_obex]) from [<bf025794>] (usb_add_function+0x58/0xf4
[libcomposite])
[   19.197143] [<bf025794>] (usb_add_function+0x58/0xf4 [libcomposite]) from [<bf037420>]
(nokia_bind_config+0x204/0x250 [g_nokia])
[   19.227905] [<bf037420>] (nokia_bind_config+0x204/0x250 [g_nokia]) from [<bf0263fc>] (usb_add_config+0x28/0xc0
[libcomposite])
[   19.258483] [<bf0263fc>] (usb_add_config+0x28/0xc0 [libcomposite]) from [<bf03709c>] (nokia_bind+0x9c/0x21c
[g_nokia])
[   19.288421] [<bf03709c>] (nokia_bind+0x9c/0x21c [g_nokia]) from [<bf0275bc>] (composite_bind+0x74/0x180
[libcomposite])
[   19.318420] [<bf0275bc>] (composite_bind+0x74/0x180 [libcomposite]) from [<c027d658>]
(udc_bind_to_driver+0x2c/0xc4)
[   19.348114] [<c027d658>] (udc_bind_to_driver+0x2c/0xc4) from [<c027d764>] (usb_gadget_probe_driver+0x74/0x94)
[   19.377166] [<c027d764>] (usb_gadget_probe_driver+0x74/0x94) from [<c00086f8>] (do_one_initcall+0x94/0x138)
[   19.406005] [<c00086f8>] (do_one_initcall+0x94/0x138) from [<c007a460>] (load_module+0x113c/0x13c4)
[   19.434051] [<c007a460>] (load_module+0x113c/0x13c4) from [<c007a7b4>] (SyS_init_module+0xcc/0xec)
[   19.462127] [<c007a7b4>] (SyS_init_module+0xcc/0xec) from [<c000dd40>] (ret_fast_syscall+0x0/0x30)
[   19.490753] Code: 0a00002e e1a00004 eb001438 e598300c (e5d3202c)
[   19.506805] ---[ end trace 060b62ec0d68a78b ]---
[   19.523132] Kernel panic - not syncing: Fatal exception in interrupt

dump is from 3.12-rc5 kernel

Reported-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-02-18 09:38:11 -06:00
Greg Kroah-Hartman 5328f35b15 usb: patches for v3.13
Final conversions to configfs for mass storage, acm_ms, and
 multi gadgets.
 
 MUSB should now work out of the box on AM335x-based boards
 (beagle bone white and black) with DMA thanks to Sebastian's
 work.
 
 We can now enable VERBOSE_DEBUG on builds of drivers/usb/gadget/
 by selecting CONFIG_USB_GADGET_VERBOSE.
 
 s3c-hsotg got quite a few non-critical fixes but also learned
 a few new tricks (isochronous transfers, multi count support).
 
 The Marvel USB3 Controller driver got a memory leak fix.
 
 devm_usb_get_phy() learned not to return NULL, ever.
 
 Other than these patches, we have the usual set of cleanups
 ranging from removal of unnecessary *_set_drvdata() to using
 SIMPLE_DEV_PM_OPS.
 
 Signed-of-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'usb-for-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

usb: patches for v3.13

Final conversions to configfs for mass storage, acm_ms, and
multi gadgets.

MUSB should now work out of the box on AM335x-based boards
(beagle bone white and black) with DMA thanks to Sebastian's
work.

We can now enable VERBOSE_DEBUG on builds of drivers/usb/gadget/
by selecting CONFIG_USB_GADGET_VERBOSE.

s3c-hsotg got quite a few non-critical fixes but also learned
a few new tricks (isochronous transfers, multi count support).

The Marvel USB3 Controller driver got a memory leak fix.

devm_usb_get_phy() learned not to return NULL, ever.

Other than these patches, we have the usual set of cleanups
ranging from removal of unnecessary *_set_drvdata() to using
SIMPLE_DEV_PM_OPS.

Signed-of-by: Felipe Balbi <balbi@ti.com>
2013-10-24 16:18:40 +01:00
Roger Quadros 8934d3e4d0 usb: musb: omap2430: Don't use omap_get_control_dev()
omap_get_control_dev() is being deprecated as it doesn't support
multiple instances. As control device is present only from OMAP4
onwards which supports DT only, we use phandles to get the
reference to the control device.

Also get rid of "ti,has-mailbox" property as it is redundant and
we can determine that from whether "ctrl-module" property is present
or not. Get rid of has_mailbox from musb_hdrc_platform_data as well.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-10-03 15:47:31 -07:00
Pali Rohár 6fa7178ce7 usb: musb: Call atomic_notifier_call_chain when status is changed
More power supply drivers depends on vbus events and without it they not
working. Power supply drivers using usb_register_notifier, so to deliver
events it is needed to call atomic_notifier_call_chain.

So without atomic notifier power supply driver isp1704 not retrieving
vbus status and reporting bogus values to userspace and also to board
platform data functions. Without proper data charger drivers trying to
charge battery also when charger is disconnected or do not start charging
when wallcharger connects.

Atomic notifier in musb driver was used before v3.5 and was replaced with
omap mailbox. This patch adding atomic_notifier_call_chain call from
function omap_musb_set_mailbox.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-10-01 09:31:14 -05:00
Kishon Vijay Abraham I 3e3101d57c usb: musb: omap2430: use the new generic PHY framework
Use the generic PHY framework API to get the PHY. The usb_phy_set_resume
and usb_phy_set_suspend is replaced with power_on and
power_off to align with the new PHY framework.

musb->xceiv can't be removed as of now because musb core uses xceiv.state and
xceiv.otg. Once there is a separate state machine to handle otg, these can be
moved out of xceiv and then we can start using the generic PHY framework.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-27 17:36:58 -07:00
Greg Kroah-Hartman 165f60642a usb: patches for v3.12 merge window
All patches here have been pending on linux-usb
 and sitting in linux-next for a while now.
 
 The biggest things in this tag are:
 
 DWC3 learned proper usage of threaded IRQ
 handlers and now we spend very little time
 in hardirq context.
 
 MUSB now has proper support for BeagleBone and
 Beaglebone Black.
 
 Tegra's USB support also got quite a bit of love
 and is learning to use PHY layer and generic DT
 attributes.
 
 Other than that, the usual pack of cleanups and
 non-critical fixes follow.
 
 Signed-of-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'usb-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

usb: patches for v3.12 merge window

All patches here have been pending on linux-usb
and sitting in linux-next for a while now.

The biggest things in this tag are:

DWC3 learned proper usage of threaded IRQ
handlers and now we spend very little time
in hardirq context.

MUSB now has proper support for BeagleBone and
Beaglebone Black.

Tegra's USB support also got quite a bit of love
and is learning to use PHY layer and generic DT
attributes.

Other than that, the usual pack of cleanups and
non-critical fixes follow.

Signed-of-by: Felipe Balbi <balbi@ti.com>

Conflicts:
	drivers/usb/gadget/udc-core.c
	drivers/usb/host/ehci-tegra.c
	drivers/usb/musb/omap2430.c
	drivers/usb/musb/tusb6010.c
2013-08-13 15:28:01 -07:00
Jingoo Han c1a7d67c19 usb: musb: use dev_get_platdata()
Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2013-07-30 11:21:54 +03:00