linux.git/drivers/usb/chipidea/ci.h, branch v3.13 Linux kernel source tree usb: chipidea: add wait vbus lower than OTGSC_BSV before role starts 2013-08-14T19:37:20+00:00 Peter Chen peter.chen@freescale.com 2013-08-14T09:44:12+00:00 22fa84455a2a80566ead8efe4b5e629f2375da60 When the gadget role starts, we need to make sure the vbus is lower than OTGSC_BSV, or there will be an vbus interrupt since we use B_SESSION_VALID as vbus interrupt to indicate connect and disconnect. When the host role starts, it may not be useful to wait vbus to lower than OTGSC_BSV, but it can indicate some hardware problems like the vbus is still higher than OTGSC_BSV after we disconnect to host some time later (5000 milliseconds currently), which is obvious not correct. Tested-by: Marek Vasut <marex@denx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
When the gadget role starts, we need to make sure the vbus is lower
than OTGSC_BSV, or there will be an vbus interrupt since we use
B_SESSION_VALID as vbus interrupt to indicate connect and disconnect.
When the host role starts, it may not be useful to wait vbus to lower
than OTGSC_BSV, but it can indicate some hardware problems like the
vbus is still higher than OTGSC_BSV after we disconnect to host some
time later (5000 milliseconds currently), which is obvious not correct.

Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: chipidea: add vbus interrupt handler 2013-08-14T19:37:20+00:00 Peter Chen peter.chen@freescale.com 2013-08-14T09:44:11+00:00 a107f8c505cd8606ae192d24c70b380e980fbe67 We add vbus interrupt handler at ci_otg_work, it uses OTGSC_BSV(at otgsc) to know it is connect or disconnet event. Meanwhile, we introduce two flags id_event and b_sess_valid_event to indicate it is an id interrupt or a vbus interrupt. Tested-by: Marek Vasut <marex@denx.de> Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
We add vbus interrupt handler at ci_otg_work, it uses OTGSC_BSV(at otgsc)
to know it is connect or disconnet event.
Meanwhile, we introduce two flags id_event and b_sess_valid_event to
indicate it is an id interrupt or a vbus interrupt.

Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: chipidea: drop "13xxx" infix 2013-06-24T23:16:55+00:00 Alexander Shishkin alexander.shishkin@linux.intel.com 2013-06-24T11:46:36+00:00 8e22978c57087aac4d88693278db1cc3e94f1253 "ci13xxx" is bad for at least the following reasons: * people often mistype it * it doesn't add any informational value to the names it's used in * it needlessly attracts mail filters This patch replaces it with "ci_hdrc", "ci_udc" or "ci_hw", depending on the situation. Modules with ci13xxx prefix are also renamed accordingly and aliases are added for compatibility. Otherwise, no functional changes. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
"ci13xxx" is bad for at least the following reasons:
  * people often mistype it
  * it doesn't add any informational value to the names it's used in
  * it needlessly attracts mail filters

This patch replaces it with "ci_hdrc", "ci_udc" or "ci_hw", depending
on the situation. Modules with ci13xxx prefix are also renamed accordingly
and aliases are added for compatibility. Otherwise, no functional changes.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: chipidea: udc: add multiple td support to hardware_{en,de}queue 2013-06-17T20:45:47+00:00 Michael Grzeschik m.grzeschik@pengutronix.de 2013-06-13T14:59:54+00:00 2e270412968d961ecde347343ffa67dfe39f6c95 This patch removes the restriction of having a limited amount of only four active tds on one endpoint. We use the linked list implementation to manage all tds which get added and removed by hardware_{en,de}queue. The removal of this restriction adds the driver to run into a hardware errata. It's possible that the hardware will still address an transfer descriptor that already got cleaned up. To solve this the patch also postpone the cleanup of processed tds by one. Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
This patch removes the restriction of having a limited amount of only
four active tds on one endpoint. We use the linked list implementation
to manage all tds which get added and removed by hardware_{en,de}queue.

The removal of this restriction adds the driver to run into a hardware
errata. It's possible that the hardware will still address an transfer
descriptor that already got cleaned up. To solve this the patch also
postpone the cleanup of processed tds by one.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: chipidea: udc: add the define TD_PAGE_COUNT and fix all users 2013-03-30T15:20:49+00:00 Michael Grzeschik m.grzeschik@pengutronix.de 2013-03-30T10:54:10+00:00 b983e51a73b60b358e2c15a64c0c489cb266fe67 A static count of transfer descriptors was used everywhere in the driver with the fixed number 5. This patch adds a define, named TD_PAGE_COUNT, and replaces all users of this value. This way its possible to have only one parameter to change and limit the amount of buffer pointers per TD. Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Reviewed-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
A static count of transfer descriptors was used everywhere in the driver
with the fixed number 5. This patch adds a define, named TD_PAGE_COUNT,
and replaces all users of this value. This way its possible to have only
one parameter to change and limit the amount of buffer pointers per TD.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Reviewed-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: chipidea: don't redefine __ffs() 2013-03-30T15:08:40+00:00 Felipe Balbi balbi@ti.com 2013-03-30T10:53:55+00:00 727b4ddb48dcd8c9ca81b58ca58191233bdf75aa chipidea's ffs_nr() is pretty much what __ffs() does. Use that one instead. Signed-off-by: Felipe Balbi <balbi@ti.com> [rebased on top of debug infrastructure rework] Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
chipidea's ffs_nr() is pretty much what __ffs() does.

Use that one instead.

Signed-off-by: Felipe Balbi <balbi@ti.com>
[rebased on top of debug infrastructure rework]
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: chipidea: convert debug entries in sysfs to debugfs 2013-03-30T15:08:39+00:00 Alexander Shishkin alexander.shishkin@linux.intel.com 2013-03-30T10:53:51+00:00 2d6512892c106556f07e502939005e73cdc6e2cc Currently, we have a bunch of files in sysfs that display all sorts of debugging information for the device controller, so they have to move to debugfs where they belong. The "registers" interface have been removed, since it doesn't fit into the current driver design as is and it's hardly a good idea to touch the registers from userspace anyway. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Currently, we have a bunch of files in sysfs that display all sorts of
debugging information for the device controller, so they have to move to
debugfs where they belong. The "registers" interface have been removed,
since it doesn't fit into the current driver design as is and it's hardly
a good idea to touch the registers from userspace anyway.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Revert "USB: chipidea: add vbus detect for udc" 2013-03-30T03:55:46+00:00 Peter Chen peter.chen@freescale.com 2013-03-30T00:46:43+00:00 571bb7abac4ed02cf7d5094b4a04a8bdca3783ed There are several problems with this patch: + in introduces a sparse warning for a condition that's always negative, + and because of that, it actually doesn't do anything useful, + and vbus detection belongs to otg, not device function anyway. This reverts commit 8c4fc031954b4eb72daf13d3c907a985a3eee208. Signed-off-by: Peter Chen <peter.chen@freescale.com> [Alex: amended the above text] Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
There are several problems with this patch:
  + in introduces a sparse warning for a condition that's always negative,
  + and because of that, it actually doesn't do anything useful,
  + and vbus detection belongs to otg, not device function anyway.

This reverts commit 8c4fc031954b4eb72daf13d3c907a985a3eee208.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
[Alex: amended the above text]
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
USB: chipidea: add vbus detect for udc 2012-09-12T18:20:38+00:00 Richard Zhao richard.zhao@freescale.com 2012-09-12T11:58:09+00:00 8c4fc031954b4eb72daf13d3c907a985a3eee208 Using vbus valid interrupt to detect vbus. Tested-by: Michael Grzeschik <m.grzeschik@pengutronix.de> Tested-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Richard Zhao <richard.zhao@freescale.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Using vbus valid interrupt to detect vbus.

Tested-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
usb: chipidea: permit driver bindings pass phy pointer 2012-07-09T16:59:23+00:00 Richard Zhao richard.zhao@freescale.com 2012-07-07T14:56:46+00:00 a2c3d6902f6f9916b5376c44baa8c1d08bf92a27 Sometimes, the driver bindings may know what phy they use. For example, when using device tree, the usb controller may have a phandler pointing to usb phy. Signed-off-by: Richard Zhao <richard.zhao@freescale.com> Reviewed-by: Marek Vasut <marex@denx.de> Acked-by: Felipe Balbi <balbi@ti.com> Tested-by: Subodh Nijsure <snijsure@grid-net.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Sometimes, the driver bindings may know what phy they use.
For example, when using device tree, the usb controller may have a
phandler pointing to usb phy.

Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Felipe Balbi <balbi@ti.com>
Tested-by: Subodh Nijsure <snijsure@grid-net.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>