The ehci_init_driver is used to initialize hcd APIs for each
ehci controller driver, it is designed to be called only one time
and before driver register is called. The current design will
cause ehci_init_driver is called multiple times at probe process,
it will cause hc_driver's initialization affect current running hcd.

We run out NULL pointer dereference problem when one hcd is started
by module_init, and the other is started by otg thread at SMP platform.
The reason for this problem is ehci_init_driver will do memory copy
for current uniform hc_driver, and this memory copy will do memset (as 0)
first, so when the first hcd is running usb_add_hcd, and the second
hcd may clear the uniform hc_driver's space (at ehci_init_driver),
then the first hcd will meet NULL pointer at the same time.

See below two logs:

LOG_1:
ci_hdrc ci_hdrc.0: EHCI Host Controller
ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
ci_hdrc ci_hdrc.1: doesn't support gadget
Unable to handle kernel NULL pointer dereference at virtual address 00000014
pgd = 80004000
[00000014] *pgd=00000000
Internal error: Oops: 805 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 108 Comm: kworker/u8:2 Not tainted 3.14.38-222193-g24b2734-dirty #25
Workqueue: ci_otg ci_otg_work
task: d839ec00 ti: d8400000 task.ti: d8400000
PC is at ehci_run+0x4c/0x284
LR is at _raw_spin_unlock_irqrestore+0x28/0x54
pc : [<8041f9a0>]    lr : [<8070ea84>]    psr: 60000113
sp : d8401e30  ip : 00000000  fp : d8004400
r10: 00000001  r9 : 00000001  r8 : 00000000
r7 : 00000000  r6 : d8419940  r5 : 80dd24c0  r4 : d8419800
r3 : 8001d060  r2 : 00000000  r1 : 00000001  r0 : 00000000
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c53c7d  Table: 1000404a  DAC: 00000015
Process kworker/u8:2 (pid: 108, stack limit = 0xd8400238)
Stack: (0xd8401e30 to 0xd8402000)
1e20:                                     d87523c0 d8401e48 66667562 d8419800
1e40: 00000000 00000000 d8419800 00000000 00000000 00000000 d84198b0 8040fcdc
1e60: 00000000 80dd320c d8477610 d8419c00 d803d010 d8419800 00000000 00000000
1e80: d8004400 00000000 d8400008 80431494 80431374 d803d100 d803d010 d803d1ac
1ea0: 00000000 80432428 804323d4 d803d100 00000001 80435eb8 80e0d0bc d803d100
1ec0: 00000006 80436458 00000000 d803d100 80e92ec8 80436f44 d803d010 d803d100
1ee0: d83fde00 8043292c d8752710 d803d1f4 d803d010 8042ddfc 8042ddb8 d83f3b00
1f00: d803d1f4 80042b60 00000000 00000003 00000001 00000001 80054598 d83f3b00
1f20: d8004400 d83f3b18 d8004414 d8400000 80e3957b 00000089 d8004400 80043814
1f40: d839ec00 00000000 d83fcd80 d83f3b00 800436e4 00000000 00000000 00000000
1f60: 00000000 80048f34 00000000 00000000 00000000 d83f3b00 00000000 00000000
1f80: d8401f80 d8401f80 00000000 00000000 d8401f90 d8401f90 d8401fac d83fcd80
1fa0: 80048e68 00000000 00000000 8000e538 00000000 00000000 00000000 00000000
1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[<8041f9a0>] (ehci_run) from [<8040fcdc>] (usb_add_hcd+0x248/0x6e8)
[<8040fcdc>] (usb_add_hcd) from [<80431494>] (host_start+0x120/0x2e4)
[<80431494>] (host_start) from [<80432428>] (ci_otg_start_host+0x54/0xbc)
[<80432428>] (ci_otg_start_host) from [<80435eb8>] (otg_set_protocol+0xa4/0xd0)
[<80435eb8>] (otg_set_protocol) from [<80436458>] (otg_set_state+0x574/0xc58)
[<80436458>] (otg_set_state) from [<80436f44>] (otg_statemachine+0x408/0x46c)
[<80436f44>] (otg_statemachine) from [<8043292c>] (ci_otg_fsm_work+0x3c/0x190)
[<8043292c>] (ci_otg_fsm_work) from [<8042ddfc>] (ci_otg_work+0x44/0x1c4)
[<8042ddfc>] (ci_otg_work) from [<80042b60>] (process_one_work+0xf4/0x35c)
[<80042b60>] (process_one_work) from [<80043814>] (worker_thread+0x130/0x3bc)
[<80043814>] (worker_thread) from [<80048f34>] (kthread+0xcc/0xe4)
[<80048f34>] (kthread) from [<8000e538>] (ret_from_fork+0x14/0x3c)
Code: e5953018 e3530000 0a000000 e12fff33 (e5878014)

LOG_2:
ci_hdrc ci_hdrc.0: EHCI Host Controller
ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
ci_hdrc ci_hdrc.1: doesn't support gadget
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = 80004000
[00000000] *pgd=00000000
In Online 00:00ternal e      Offline rror: Oops: 80000005 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 0 PID: 108 Comm: kworker/u8:2 Not tainted 3.14.38-02007-g24b2734-dirty #127
Workque Online 00:00ue: ci_o      Offline tg ci_otg_work
Online 00:00task: d8      Offline 39ec00 ti: d83ea000 task.ti: d83ea000
PC is at 0x0
LR is at usb_add_hcd+0x248/0x6e8
pc : [<00000000>]    lr : [<8040f644>]    psr: 60000113
sp : d83ebe60  ip : 00000000  fp : d8004400
r10: 00000001  r9 : 00000001  r8 : d85fd4b0
r7 : 00000000  r6 : 00000000  r5 : 00000000  r4 : d85fd400
r3 : 00000000  r2 : d85fd4f4  r1 : 80410178  r0 : d85fd400
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c53c7d  Table: 1000404a  DAC: 00000015
Process kworker/u8:2 (pid: 108, stack limit = 0xd83ea238)
Stack: (0xd83ebe60 to 0xd83ec000)
be60: 00000000 80dd920c d8654e10 d85fd800 d803e010 d85fd400 00000000 00000000
be80: d8004400 00000000 d83ea008 80430e34 80430d14 d803e100 d803e010 d803e1ac
bea0: 00000000 80431dc8 80431d74 d803e100 00000001 80435858 80e130bc d803e100
bec0: 00000006 80435df8 00000000 d803e100 80e98ec8 804368e4 d803e010 d803e100
bee0: d86e8100 804322cc d86cf050 d803e1f4 d803e010 8042d79c 8042d758 d83cf900
bf00: d803e1f4 80042b78 00000000 00000003 00000001 00000001 800545e8 d83cf900
bf20: d8004400 d83cf918 d8004414 d83ea000 80e3f57b 00000089 d8004400 8004382c
bf40: d839ec00 00000000 d8393780 d83cf900 800436fc 00000000 00000000 00000000
bf60: 00000000 80048f50 80e019f4 00000000 0000264c d83cf900 00000000 00000000
bf80: d83ebf80 d83ebf80 00000000 00000000 d83ebf90 d83ebf90 d83ebfac d8393780
bfa0: 80048e84 00000000 00000000 8000e538 00000000 00000000 00000000 00000000
bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 ee66e85d 133ebd03
[<804 Online 00:000f644>]       Offline (usb_add_hcd) from [<80430e34>] (host_start+0x120/0x2e4)
[<80430e34>] (host_start) from [<80431dc8>] (ci_otg_start_host+0x54/0xbc)
[<80431dc8>] (ci_otg_start_host) from [<80435858>] (otg_set_protocol+0xa4/0xd0)
[<80435858>] (otg_set_protocol) from [<80435df8>] (otg_set_state+0x574/0xc58)
[<80435df8>] (otg_set_state) from [<804368e4>] (otg_statemachine+0x408/0x46c)
[<804368e4>] (otg_statemachine) from [<804322cc>] (ci_otg_fsm_work+0x3c/0x190)
[<804322cc>] (ci_otg_fsm_work) from [<8042d79c>] (ci_otg_work+0x44/0x1c4)
[<8042d79c>] (ci_otg_work) from [<80042b78>] (process_one_work+0xf4/0x35c)
[<80042b78>] (process_one_work) from [<8004382c>] (worker_thread+0x130/0x3bc)
[<8004382c>] (worker_thread) from [<80048f50>] (kthread+0xcc/0xe4)
[<80048f50>] (kthread) from [<8000e538>] (ret_from_fork+0x14/0x3c)
Code: bad PC value

Cc: Jun Li <jun.li@freescale.com>
Cc: <stable@vger.kernel.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>

The Marvell 28nm HSIC PHY requires the port to be forced to HS mode after
the port power is applied. This is done using the test mode in the PORTSC
register.

As HSIC is always HS, this work-around should be safe to do with all HSIC
PHYs and has been tested on i.MX6S.
Signed-off-by: NRob Herring <robh@kernel.org>
Tested-by: NPeter Chen <Peter.Chen@freescale.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

If CI_HDRC_TURN_VBUS_EARLY_ON is set, turn on vbus before adding hcd, so it
will not set reg_vbus of ehci_ci_priv, then vbus will not be handled by ehci core.
Signed-off-by: NLi Jun <jun.li@freescale.com>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

For chipidea, its resume sequence is not-EHCI compatible, see
below description for FPR at portsc. So in order to send SoF in
time for remote wakeup sequence(within 3ms), the RUN/STOP bit must
be set before the resume signal is ended, but the usb resume
code may run after resume signal is ended, so we had to set it
at suspend path.

Force Port Resume - RW. Default = 0b.
1= Resume detected/driven on port.
0=No resume (K-state) detected/driven on port.
Host mode:
Software sets this bit to one to drive resume signaling. The Controller sets this bit to '1' if
a J-to-K transition is detected while the port is in the Suspend state. When this bit
transitions to a '1' because a J-to-K transition is detected, the Port Change Detect bit in
the USBSTS register is also set to '1'. This bit will automatically change to '0' after the
resume sequence is complete. This behavior is different from EHCI where the controller
driver is required to set this bit to a '0' after the resume duration is timed in the driver.
Note that when the controller owns the port, the resume sequence follows the defined

sequence documented in the USB Specification Revision 2.0. The resume signaling
(Full-speed 'K') is driven on the port as long as this bit remains a '1'. This bit will remain
a '1' until the port has switched to idle. Writing a '0' has no affect because the port
controller will time the resume operation, clear the bit and the port control state switches
to HS or FS idle.
This field is '0' if Port Power(PP) is '0' in host mode.

This bit is not-EHCI compatible.
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Chipidea: Set connect-at-fullspeed bit when entering host mode if CI_HDRC_FORCE_FULLSPEED is set in the platform data

PORTSC_PFSC is not set on entering host mode which means the USB OTG
controller will attempt to enumerate USB devices at high speed even when the
CI_HDRC_FORCE_FULLSPEED flag is set in the platform data.

This patch ensures it is set right before host mode operations begin if needed.
Signed-off-by: NDaniel Tang <dt.tangr@gmail.com>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This reverts commit 14b4099c

It moved platform_set_drvdata(pdev, ci) before hcd is created,
and the hcd will assign itself as ci controller's drvdata during
the hcd creation function (in usb_create_shared_hcd), so it
overwrites the real ci's drvdata which we want to use.

So, if the controller is at host mode, the system suspend
API will get the wrong struct ci_hdrc pointer, and cause the
oops.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The core driver has already done it, besides, move set driver data
operation just after ci has allocated successfully in case some
code (like ci_role_start) want to access this driver data.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch adds an external portpower override callback, only single
port regulator control is supported now.
Signed-off-by: NMichael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch adds support of the PHY framework for ChipIdea drivers.
Changes are done in both the ChipIdea common code and in the drivers
accessing the PHY. This is done by adding a new PHY member in
ChipIdea's structures and by taking care of it in the code.
Signed-off-by: NAntoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This patch modify the generic code handling PHYs to allow them to be
supplied from the drivers. This adds checks to ensure no PHY was already
there when looking for one in the generic code. This also makes sure we
do not modify its state in the generic HCD functions, it was provided by
the driver.
Signed-off-by: NAntoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The USB PHY member of the HCD structure is renamed to 'usb_phy' and
modifications are done in all drivers accessing it.
This is in preparation to adding the generic PHY support.
Signed-off-by: NAntoine Tenart <antoine.tenart@free-electrons.com>
[Sergei: added missing 'drivers/usb/misc/lvstest.c' file, resolved rejects,
updated changelog.]
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Acked-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

For OTG and Embedded hosts, they may need TPL (Targeted Peripheral List)
for usb certification and other vender specific requirements, the
platform can tell chipidea core driver if it supports tpl through DT
or platform data.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Init otg_port number of otg capable host to be 1 at host start.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NLi Jun <b47624@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Leave vbus on/off hanlded by OTG fsm if in OTG mode.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NLi Jun <b47624@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

According to Freescale imx28 Errata, "ENGR119653 USB: ARM to USB
register error issue", All USB register write operations must
use the ARM SWP instruction. So, we implement special hw_write
and hw_test_and_clear for imx28.

Discussion for it at below:
http://marc.info/?l=linux-usb&m=137996395529294&w=2

This patch is needed for stable tree 3.11+.

Cc: stable@vger.kernel.org
Cc: robert.hodaszi@digi.com
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Tested-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Commit 40ed51a4 (usb: chipidea: host: add vbus regulator
control) introduced a smatch complaint because regulator_disable() is called
without checking whether ci->platdata->reg_vbus is not NULL.

Fix this by adding the check.

This patch is needed for 3.12 stable

Cc: stable <stable@vger.kernel.org>
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Commit 40ed51a4 (usb: chipidea: host: add vbus regulator
control) introduced a smatch complaint because regulator_disable() is called
without checking whether ci->platdata->reg_vbus is not NULL.

Fix this by adding the check.
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Like http://marc.info/?l=linux-usb&m=138200449428874&w=2 said:
two more things are needed to be done:

- If host_start fails, the host_stop should not be called, so we
add check that ci->hcd is not NULL.
- if the host_start fails at the beginning, we need to consider
regulator mismatch issue.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

When CMA fails to initialize in v3.12-rc4, the chipidea driver oopses
the kernel while trying to remove and put the HCD which doesn't exist:

WARNING: CPU: 0 PID: 6 at /home/rmk/git/linux-rmk/arch/arm/mm/dma-mapping.c:511
__dma_alloc+0x200/0x240()
coherent pool not initialised!
Modules linked in:
CPU: 0 PID: 6 Comm: kworker/u2:0 Tainted: G        W    3.12.0-rc4+ #56
Workqueue: deferwq deferred_probe_work_func
Backtrace:
[<c001218c>] (dump_backtrace+0x0/0x10c) from [<c0012328>] (show_stack+0x18/0x1c)
 r6:c05fd9cc r5:000001ff r4:00000000 r3:df86ad00
[<c0012310>] (show_stack+0x0/0x1c) from [<c05f3a4c>] (dump_stack+0x70/0x8c)
[<c05f39dc>] (dump_stack+0x0/0x8c) from [<c00230a8>] (warn_slowpath_common+0x6c/0x8c)
 r4:df883a60 r3:df86ad00
[<c002303c>] (warn_slowpath_common+0x0/0x8c) from [<c002316c>] (warn_slowpath_fmt+0x38/0x40)
 r8:ffffffff r7:00001000 r6:c083b808 r5:00000000 r4:df2efe80
[<c0023134>] (warn_slowpath_fmt+0x0/0x40) from [<c00196bc>] (__dma_alloc+0x200/0x240)
 r3:00000000 r2:c05fda00
[<c00194bc>] (__dma_alloc+0x0/0x240) from [<c001982c>] (arm_dma_alloc+0x88/0xa0)
[<c00197a4>] (arm_dma_alloc+0x0/0xa0) from [<c03e2904>] (ehci_setup+0x1f4/0x438)
[<c03e2710>] (ehci_setup+0x0/0x438) from [<c03cbd60>] (usb_add_hcd+0x18c/0x664)
[<c03cbbd4>] (usb_add_hcd+0x0/0x664) from [<c03e89f4>] (host_start+0xf0/0x180)
[<c03e8904>] (host_start+0x0/0x180) from [<c03e7c34>] (ci_hdrc_probe+0x360/0x670
)
 r6:df2ef410 r5:00000000 r4:df2c3010 r3:c03e8904
[<c03e78d4>] (ci_hdrc_probe+0x0/0x670) from [<c0311044>] (platform_drv_probe+0x20/0x24)
[<c0311024>] (platform_drv_probe+0x0/0x24) from [<c030fcac>] (driver_probe_device+0x9c/0x234)
...
---[ end trace c88ccaf3969e8422 ]---
Unable to handle kernel NULL pointer dereference at virtual address 00000028
pgd = c0004000
[00000028] *pgd=00000000
Internal error: Oops: 17 [#1] SMP ARM
Modules linked in:
CPU: 0 PID: 6 Comm: kworker/u2:0 Tainted: G        W    3.12.0-rc4+ #56
Workqueue: deferwq deferred_probe_work_func
task: df86ad00 ti: df882000 task.ti: df882000
PC is at usb_remove_hcd+0x10/0x150
LR is at host_stop+0x1c/0x3c
pc : [<c03cacec>]    lr : [<c03e88e4>]    psr: 60000013
sp : df883b50  ip : df883b78  fp : df883b74
r10: c11f4c54  r9 : c0836450  r8 : df30c400
r7 : fffffff4  r6 : df2ef410  r5 : 00000000  r4 : df2c3010
r3 : 00000000  r2 : 00000000  r1 : df86b0a0  r0 : 00000000
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c53c7d  Table: 2f29404a  DAC: 00000015
Process kworker/u2:0 (pid: 6, stack limit = 0xdf882240)
Stack: (0xdf883b50 to 0xdf884000)
...
Backtrace:
[<c03cacdc>] (usb_remove_hcd+0x0/0x150) from [<c03e88e4>] (host_stop+0x1c/0x3c)
 r6:df2ef410 r5:00000000 r4:df2c3010
[<c03e88c8>] (host_stop+0x0/0x3c) from [<c03e8aa0>] (ci_hdrc_host_destroy+0x1c/0x20)
 r5:00000000 r4:df2c3010
[<c03e8a84>] (ci_hdrc_host_destroy+0x0/0x20) from [<c03e7c80>] (ci_hdrc_probe+0x3ac/0x670)
[<c03e78d4>] (ci_hdrc_probe+0x0/0x670) from [<c0311044>] (platform_drv_probe+0x20/0x24)
[<c0311024>] (platform_drv_probe+0x0/0x24) from [<c030fcac>] (driver_probe_device+0x9c/0x234)
[<c030fc10>] (driver_probe_device+0x0/0x234) from [<c030ff28>] (__device_attach+0x44/0x48)
...
---[ end trace c88ccaf3969e8423 ]---

Fix this so at least we can continue booting and get to a shell prompt.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Tested-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

- The role's init will be called at probe procedure.
- The role's destroy will be called at fail patch
at probe and driver's removal.
- The role's start/stop will be called when specific
role has started.
Tested-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

For boards which have board level vbus control (eg, through gpio), we
need to vbus operation according to below rules:
- For host, we need open vbus before start hcd, and close it
after remove hcd.
- For otg, the vbus needs to be on/off when usb role switches.
When the host roles begins, it opens vbus; when the host role
finishes, it closes vbus.

We put vbus operation to host as host is the only vbus user,
When we are at host mode, the vbus is on, when we are not at
host mode, vbus should be off.
Tested-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The has_hostpc capability bit indicates that the host controller has the
HOSTPC register extensions, but at the same time enables clock disabling
power saving features with the PHY Low Power Clock Disable (PHCD) bit.

However, some host controllers have the HOSTPC extensions but don't
support the low-power feature, so the PHCD bit must not be set on those
controllers. Add a separate capability bit for the low-power feature
instead, and change all existing users of has_hostpc to use this new
capability bit.

The idea for this commit is taken from an old 2012 commit that never got
merged ("disociate chipidea PHY low power suspend control from hostpc")
Inspired-by: NMatthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: NTuomas Tynkkynen <ttynkkynen@nvidia.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Tested-by: NStephen Warren <swarren@nvidia.com>
Reviewed-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

"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: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

When running a scp transfer using a USB/Ethernet adapter the following crash
happens:

$ scp test.tar.gz fabio@192.168.1.100:/home/fabio
fabio@192.168.1.100's password:
test.tar.gz                                      0%    0     0.0KB/s   --:-- ETA
------------[ cut here ]------------
WARNING: at net/sched/sch_generic.c:255 dev_watchdog+0x2cc/0x2f0()
NETDEV WATCHDOG: eth0 (asix): transmit queue 0 timed out
Modules linked in:
Backtrace:
[<80011c94>] (dump_backtrace+0x0/0x10c) from [<804d3a5c>] (dump_stack+0x18/0x1c)
 r6:000000ff r5:80412388 r4:80685dc0 r3:80696cc0
[<804d3a44>] (dump_stack+0x0/0x1c) from [<80021868>]
(warn_slowpath_common+0x54/0x6c)
[<80021814>] (warn_slowpath_common+0x0/0x6c) from [<80021924>]
(warn_slowpath_fmt+0x38/0x40)
...

Setting SDIS (Stream Disable Mode- bit 4 of USBMODE register) fixes the problem.

However, in current code CI13XXX_DISABLE_STREAMING flag is only set in udc mode,
so allow disabling streaming also in host mode.

Tested on a mx6qsabrelite board.
Suggested-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch (as1630) cleans up a few minor items resulting from the
split-up of the ehci-hcd driver:

	Remove the product_desc string from the ehci_driver_overrides
	structure.  All drivers will use the generic "EHCI Host
	Controller" string.  (This was requested by Felipe Balbi.)

	Allow drivers to pass a NULL pointer to ehci_init_driver()
	if they don't have to override any settings.

	Remove a #define symbol that is no longer used from the
	ChipIdea host driver.

	Rename overrides to pci_overrides in ehci-pci.c, for
	consistency with ehci-platform.c.

	Mark the *_overrides structures as __initdata.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch (as1629) fixes a build error in the ChipIdea host driver
when compiled for the ARM architecture.  The error was introduced
by commit 99f91934 (USB: EHCI: make
ehci-platform a separate driver).

The fix is simple; an additional header-file #include is needed.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Tested-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch (as1627) splits the ehci-hcd core code, which has become a
separate library module, out from the ChipIdea host driver.  Instead
of #include-ing ehci-hcd.c directly, the ChipIdea module will now use
the ehci-hcd library in a normal fashion.

This fixes a build error caused by commit
3e023203 (USB: EHCI: prepare to make
ehci-hcd a library module); I had forgotten about the unorthodox way
the ChipIdea driver uses the ehci-hcd code.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Acked-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch (as1623) removes the ehci_port_power() routine and all the
places that call it.  There's no reason for ehci-hcd to change the
port power settings; the hub driver takes care of all that stuff.

There is one exception: When the controller is resumed from
hibernation or following a loss of power, the ports that are supposed
to be handed over to a companion controller must be powered on first.
Otherwise the handover won't work.  This process is not visible to the
hub driver, so it has to be handled in ehci-hcd.
Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg 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: NRichard Zhao <richard.zhao@freescale.com>
Reviewed-by: NMarek Vasut <marex@denx.de>
Acked-by: NFelipe Balbi <balbi@ti.com>
Tested-by: NSubodh Nijsure <snijsure@grid-net.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch rename struct ci13xxx_udc_driver and var with the type.

ci13xxx_platform_data reflect it's passed from platfrom driver.
Signed-off-by: NRichard Zhao <richard.zhao@freescale.com>
Reviewed-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Use usb_put_hcd() call instead of usb_remove_hcd() as that's the appropriate
call to drop hcd which failed registration.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Some implementations need this limitation to work correctly.
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This adds EHCI host support to the chipidea driver. We want it to be
part of the hdrc driver and not a standalone (sub-)driver module, as
the structure of ehci-hcd.c suggests, so for chipidea controller we
hack it to not provide platform-related code, but only the ehci hcd.

The ehci-platform driver won't work for us here too, because the
controller uses the same registers for both device and host mode and
also otg-related bits, so it's not really possible to put ehci registers
into a separate resource.

This is not a pretty solution, but the alternative is exporting symbols
from the chipidea driver to a ehci-chipidea driver and doing all the
module refcounting.
Signed-off-by: NAlexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>