| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 12 May 2016 11:29:24 +0300
From: Roger Quadros <rogerq@...com>
To: Peter Chen <hzpeterchen@...il.com>
CC: <peter.chen@...escale.com>, <stern@...land.harvard.edu>,
<balbi@...nel.org>, <gregkh@...uxfoundation.org>,
<dan.j.williams@...el.com>, <jun.li@...escale.com>,
<mathias.nyman@...ux.intel.com>, <tony@...mide.com>,
<Joao.Pinto@...opsys.com>, <abrestic@...omium.org>,
<yoshihiro.shimoda.uh@...esas.com>, <linux-usb@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
<devicetree@...r.kernel.org>
Subject: Re: [PATCH v7 05/14] usb: otg-fsm: move host controller operations
into usb_otg->hcd_ops
On 12/05/16 11:18, Peter Chen wrote:
> On Wed, May 11, 2016 at 03:32:30PM +0300, Roger Quadros wrote:
>> Peter,
>>
>> On 11/05/16 14:02, Roger Quadros wrote:
>>> On 11/05/16 09:10, Peter Chen wrote:
>>>> On Mon, May 02, 2016 at 03:18:48PM +0300, Roger Quadros wrote:
>>>>> This is to prevent missing symbol build error if OTG is
>>>>> enabled (built-in) and HCD core (CONFIG_USB) is module.
>>>>>
>>>>> Signed-off-by: Roger Quadros <rogerq@...com>
>>>>> Acked-by: Peter Chen <peter.chen@....com>
>>>>> ---
>>>>> drivers/usb/chipidea/otg_fsm.c | 7 +++++++
>>>>> drivers/usb/common/usb-otg-fsm.c | 15 +++++++++++----
>>>>> drivers/usb/phy/phy-fsl-usb.c | 7 +++++++
>>>>> include/linux/usb/otg.h | 2 ++
>>>>> 4 files changed, 27 insertions(+), 4 deletions(-)
>>>>>
>>>>> diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
>>>>> index 1c0c750..2d8d659 100644
>>>>> --- a/drivers/usb/chipidea/otg_fsm.c
>>>>> +++ b/drivers/usb/chipidea/otg_fsm.c
>>>>> @@ -582,6 +582,12 @@ static struct otg_fsm_ops ci_otg_ops = {
>>>>> .start_gadget = ci_otg_start_gadget,
>>>>> };
>>>>>
>>>>> +static struct otg_hcd_ops ci_hcd_ops = {
>>>>> + .usb_bus_start_enum = usb_bus_start_enum,
>>>>> + .usb_control_msg = usb_control_msg,
>>>>> + .usb_hub_find_child = usb_hub_find_child,
>>>>> +};
>>>>> +
>>>>
>>>> Is it possible have default otg_hcd_ops during OTG register to
>>>> avoid define it at every dual-role driver?
>>>
>>> Yes, I'll do that.
>>
>> Every OTG driver doesn't need to do this as this is provided by
>> hcd.c during usb_otg_add_hcd().
>>
>> So proper fix is that chipidea driver must use usb_otg_add_hcd().
>>
>
> But the chipidea is not ready to merge with framework that this patch
> set introduces. So, as a solution, we need this patch, and can remove
> the redundant information after the OTG driver uses this framework?
That is fine, but I don't want to create a default otg_hcd_ops as we
don't want to encourage its use. Do you agree?
cheers,
-roger
>>
>>>
>>>>> int ci_otg_fsm_work(struct ci_hdrc *ci)
>>>>> {
>>>>> /*
>>>>> @@ -804,6 +810,7 @@ int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
>>>>> ci->otg.fsm.id = hw_read_otgsc(ci, OTGSC_ID) ? 1 : 0;
>>>>> ci->otg.state = OTG_STATE_UNDEFINED;
>>>>> ci->otg.fsm.ops = &ci_otg_ops;
>>>>> + ci->otg.hcd_ops = &ci_hcd_ops;
>>>>> ci->gadget.hnp_polling_support = 1;
>>>>> ci->otg.fsm.host_req_flag = devm_kzalloc(ci->dev, 1, GFP_KERNEL);
>>>>> if (!ci->otg.fsm.host_req_flag)
>>>>> diff --git a/drivers/usb/common/usb-otg-fsm.c b/drivers/usb/common/usb-otg-fsm.c
>>>>> index 4bfc6a5..2986b66 100644
>>>>> --- a/drivers/usb/common/usb-otg-fsm.c
>>>>> +++ b/drivers/usb/common/usb-otg-fsm.c
>>>>> @@ -141,11 +141,16 @@ static void otg_hnp_polling_work(struct work_struct *work)
>>>>> enum usb_otg_state state = otg->state;
>>>>> u8 flag;
>>>>> int retval;
>>>>> + struct otg_hcd_ops *hcd_ops = otg->hcd_ops;
>>>>>
>>>>> if (state != OTG_STATE_A_HOST && state != OTG_STATE_B_HOST)
>>>>> return;
>>>>>
>>>>> - udev = usb_hub_find_child(otg->host->root_hub, 1);
>>>>> + if (!hcd_ops || !hcd_ops->usb_control_msg ||
>>>>> + !hcd_ops->usb_hub_find_child)
>>>>> + return;
>>>>> +
>>>>> + udev = hcd_ops->usb_hub_find_child(otg->host->root_hub, 1);
>>>>> if (!udev) {
>>>>> dev_err(otg->host->controller,
>>>>> "no usb dev connected, can't start HNP polling\n");
>>>>> @@ -154,7 +159,7 @@ static void otg_hnp_polling_work(struct work_struct *work)
>>>>>
>>>>> *fsm->host_req_flag = 0;
>>>>> /* Get host request flag from connected USB device */
>>>>> - retval = usb_control_msg(udev,
>>>>> + retval = hcd_ops->usb_control_msg(udev,
>>>>> usb_rcvctrlpipe(udev, 0),
>>>>> USB_REQ_GET_STATUS,
>>>>> USB_DIR_IN | USB_RECIP_DEVICE,
>>>>> @@ -183,7 +188,7 @@ static void otg_hnp_polling_work(struct work_struct *work)
>>>>> if (state == OTG_STATE_A_HOST) {
>>>>> /* Set b_hnp_enable */
>>>>> if (!otg->host->b_hnp_enable) {
>>>>> - retval = usb_control_msg(udev,
>>>>> + retval = hcd_ops->usb_control_msg(udev,
>>>>> usb_sndctrlpipe(udev, 0),
>>>>> USB_REQ_SET_FEATURE, 0,
>>>>> USB_DEVICE_B_HNP_ENABLE,
>>>>> @@ -262,7 +267,9 @@ static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
>>>>> otg_loc_conn(otg, 0);
>>>>> otg_loc_sof(otg, 1);
>>>>> otg_set_protocol(fsm, PROTO_HOST);
>>>>> - usb_bus_start_enum(otg->host, otg->host->otg_port);
>>>>> + if (otg->hcd_ops && otg->hcd_ops->usb_bus_start_enum)
>>>>> + otg->hcd_ops->usb_bus_start_enum(otg->host,
>>>>> + otg->host->otg_port);
>>>>> otg_start_hnp_polling(fsm);
>>>>> break;
>>>>> case OTG_STATE_A_IDLE:
>>>>> diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
>>>>> index 587a187..9dbd9f0 100644
>>>>> --- a/drivers/usb/phy/phy-fsl-usb.c
>>>>> +++ b/drivers/usb/phy/phy-fsl-usb.c
>>>>> @@ -792,6 +792,12 @@ static struct otg_fsm_ops fsl_otg_ops = {
>>>>> .start_gadget = fsl_otg_start_gadget,
>>>>> };
>>>>>
>>>>> +static struct otg_hcd_ops fsl_hcd_ops = {
>>>>> + .usb_bus_start_enum = usb_bus_start_enum,
>>>>> + .usb_control_msg = usb_control_msg,
>>>>> + .usb_hub_find_child = usb_hub_find_child,
>>>>> +};
>>>>> +
>>>>> /* Initialize the global variable fsl_otg_dev and request IRQ for OTG */
>>>>> static int fsl_otg_conf(struct platform_device *pdev)
>>>>> {
>>>>> @@ -820,6 +826,7 @@ static int fsl_otg_conf(struct platform_device *pdev)
>>>>>
>>>>> /* Set OTG state machine operations */
>>>>> fsl_otg_tc->otg.fsm.ops = &fsl_otg_ops;
>>>>> + fsl_otg_tc->otg.hcd_ops = &fsl_hcd_ops;
>>>>>
>>>>> /* initialize the otg structure */
>>>>> fsl_otg_tc->phy.label = DRIVER_DESC;
>>>>> diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
>>>>> index e8a14dc..85b8fb5 100644
>>>>> --- a/include/linux/usb/otg.h
>>>>> +++ b/include/linux/usb/otg.h
>>>>> @@ -12,6 +12,7 @@
>>>>> #include <linux/phy/phy.h>
>>>>> #include <linux/usb/phy.h>
>>>>> #include <linux/usb/otg-fsm.h>
>>>>> +#include <linux/usb/hcd.h>
>>>>>
>>>>> struct usb_otg {
>>>>> u8 default_a;
>>>>> @@ -24,6 +25,7 @@ struct usb_otg {
>>>>>
>>>>> enum usb_otg_state state;
>>>>> struct otg_fsm fsm;
>>>>> + struct otg_hcd_ops *hcd_ops;
>>>>>
>>>>> /* bind/unbind the host controller */
>>>>> int (*set_host)(struct usb_otg *otg, struct usb_bus *host);
>>>>> --
>>>>> 2.7.4
>>>>>
>>>>> --
>>>>> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
>>>>> the body of a message to majordomo@...r.kernel.org
>>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
>>> the body of a message to majordomo@...r.kernel.org
>>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>>>
>
Powered by blists - more mailing lists