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Date: Wed, 11 May 2016 14:02:21 +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 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.
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
>
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