Commit Graph

64 Commits

Author SHA1 Message Date
Felipe Balbi 59c9904cce usb: isp1760: hcd: use new USB_RESUME_TIMEOUT
Make sure we're using the new macro, so our
resume signaling will always pass certification.

Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-04-07 12:58:36 -05:00
Greg Kroah-Hartman b7a4abb674 Merge 4.0-rc7 into usb-next
We want the fixes in here, and to help resolve merge issues.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-07 11:17:34 +02:00
Sergei Shtylyov 1cf6563b3e isp1760-hcd: use USB_DT_HUB
Fix  using the  bare number to set the 'bDescriptorType' field of the Hub
Descriptor while the value  is #define'd in <linux/usb/ch11.h>.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-03 19:03:16 +02:00
Sudeep Holla 65582a7f4c usb: isp1760: fix spin unlock in the error path of isp1760_udc_start
Commit a124820de5fd ("usb: isp1760: fix possible deadlock in
isp1760_udc_irq") replaced spin_{un,}lock with spin_{un,}lock_irq{save,restore}.
However it missed an error path resulting in the smatch warning as below:

drivers/usb/isp1760/isp1760-udc.c:1230 isp1760_udc_start() warn: inconsistent returns 'irqsave:flags'.
Locked on:   line 1207
Unlocked on: line 1199

This patch fixes the spin unlock in the error path in isp1760_udc_start
thereby removing the smatch warning mentioned above.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-03-24 11:38:58 -05:00
Sudeep Holla ab7580c147 usb: isp1760: add peripheral/device controller chip id
As per the SAF1761 data sheet[0], the DcChipID register represents
the hardware version number (0001h) and the chip ID (1582h) for the
Peripheral Controller.

However as per the ISP1761 data sheet[1], the DcChipID register
represents the hardware version number (0015h) and the chip ID (8210h)
for the Peripheral Controller.

This patch adds support for both the chip ID values.

[0] http://www.nxp.com/documents/data_sheet/SAF1761.pdf
[1] http://pdf.datasheetcatalog.com/datasheets2/74/742102_1.pdf

Cc: Felipe Balbi <balbi@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-03-10 15:33:24 -05:00
Sudeep Holla 1998adab1c usb: isp1760: add peripheral/device controller chip id
As per the SAF1761 data sheet[0], the DcChipID register represents
the hardware version number (0001h) and the chip ID (1582h) for the
Peripheral Controller.

However as per the ISP1761 data sheet[1], the DcChipID register
represents the hardware version number (0015h) and the chip ID (8210h)
for the Peripheral Controller.

This patch adds support for both the chip ID values.

[0] http://www.nxp.com/documents/data_sheet/SAF1761.pdf
[1] http://pdf.datasheetcatalog.com/datasheets2/74/742102_1.pdf

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-03-09 10:49:46 -05:00
Valentin Rothberg 80b4a0f8fe usb: isp1760: set IRQ flags properly
The IRQF_DISABLED is a NOOP and scheduled to be removed.  According to
commit e58aa3d2d0 ("genirq: Run irq handlers with interrupts
disabled") running IRQ handlers with interrupts enabled can cause stack
overflows when the interrupt line of the issuing device is still active.

This patch removes using this deprecated flag and additionally removes
redundantly setting IRQF_SHARED for isp1760_udc_register().

Signed-off-by: Valentin Rothberg <Valentin.Rothberg@lip6.fr>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-03-09 10:46:15 -05:00
Sudeep Holla 798523973d usb: isp1760: fix possible deadlock in isp1760_udc_irq
Use spin_{un,}lock_irq{save,restore} in isp1760_udc_{start,stop} to
prevent following potentially deadlock scenario between
isp1760_udc_{start,stop} and isp1760_udc_irq :

=================================
[ INFO: inconsistent lock state ]
4.0.0-rc2-00004-gf7bb2ef60173 #51 Not tainted
---------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
in:imklog/2118 [HC1[1]:SC0[0]:HE0:SE1] takes:
 (&(&udc->lock)->rlock){?.+...}, at: [<c0397a93>] isp1760_udc_irq+0x367/0x9dc
{HARDIRQ-ON-W} state was registered at:
  [<c05135b3>] _raw_spin_lock+0x23/0x30
  [<c0396b87>] isp1760_udc_start+0x23/0xf8
  [<c039dc21>] udc_bind_to_driver+0x71/0xb0
  [<c039de4f>] usb_gadget_probe_driver+0x53/0x9c
  [<bf80d0df>] usb_composite_probe+0x8a/0xa4 [libcomposite]
  [<bf8311a7>] 0xbf8311a7
  [<c00088c5>] do_one_initcall+0x8d/0x17c
  [<c050b92d>] do_init_module+0x49/0x148
  [<c0087323>] load_module+0xb7f/0xbc4
  [<c0087471>] SyS_finit_module+0x51/0x74
  [<c000d8c1>] ret_fast_syscall+0x1/0x68
irq event stamp: 4966
hardirqs last  enabled at (4965): [<c05137df>] _raw_spin_unlock_irq+0x1f/0x24
hardirqs last disabled at (4966): [<c00110b3>] __irq_svc+0x33/0x64
softirqs last  enabled at (4458): [<c0023475>] __do_softirq+0x23d/0x2d0
softirqs last disabled at (4389): [<c002380b>] irq_exit+0xef/0x15c

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&(&udc->lock)->rlock);
  <Interrupt>
    lock(&(&udc->lock)->rlock);

 *** DEADLOCK ***

1 lock held by in:imklog/2118:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<c010a101>] __fdget_pos+0x31/0x34

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-03-09 10:44:08 -05:00
Nicholas Mc Guire 4d3db7d784 usb: isp1760: use msecs_to_jiffies for time conversion
This is only an API consolidation and should make things more readable
it replaces var * HZ / 1000 by msecs_to_jiffies(var).

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-02-23 09:18:20 -06:00
Greg Kroah-Hartman 4d4bac4499 usb: patches for v3.20 merge window
Here's the big pull request for Gadgets and PHYs. It's
 a total of 217 non-merge commits with pretty much everything
 being touched.
 
 The most important bits are a ton of new documentation for
 almost all usb gadget functions, a new isp1760 UDC driver,
 several improvements to the old net2280 UDC driver, and
 some minor tracepoint improvements to dwc3.
 
 Other than that, a big list of minor cleanups, smaller bugfixes
 and new features all over the place.
 
 Signed-off-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'usb-for-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

usb: patches for v3.20 merge window

Here's the big pull request for Gadgets and PHYs. It's
a total of 217 non-merge commits with pretty much everything
being touched.

The most important bits are a ton of new documentation for
almost all usb gadget functions, a new isp1760 UDC driver,
several improvements to the old net2280 UDC driver, and
some minor tracepoint improvements to dwc3.

Other than that, a big list of minor cleanups, smaller bugfixes
and new features all over the place.

Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-02-04 11:03:20 -08:00
Laurent Pinchart d21daf1e90 usb: isp1760: Fix USB disabled check
The isp1760 driver registration function returns an error if USB is
disabled. This made sense when the driver only supported host
controllers, but now that it supports peripheral controllers host
support isn't mandatory anymore.

Fix this by returning an error only when both the HCD and UDC functions
are disabled, either through the kernel configuration or at runtime.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-01-27 09:39:51 -06:00
Laurent Pinchart 1f8d9b9b50 usb: isp1760: Remove duplicate usb_disabled() check
Both isp1760_register() and isp1761_pci_probe() check whether USB is
disabled by calling usb_disabled(), and bail out with an error if it is.
One check is enough, remove the PCI-specific check.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-01-27 09:39:47 -06:00
Laurent Pinchart 100832abf0 usb: isp1760: Make HCD support optional
Enable compilation of the isp1760 driver in pure host mode, pure device
mode, or dual-role mode.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-01-27 09:39:42 -06:00
Laurent Pinchart 7ef077a8ad usb: isp1760: Move driver from drivers/usb/host/ to drivers/usb/isp1760/
Now that this is DRD, it doesn't make sense to keep it under
drivers/usb/host.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-01-27 09:39:38 -06:00