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Date: Wed, 11 May 2016 15:32:30 +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
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().
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
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>
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