usb: chipidea: core: add sysfs group (a932a804) · Commits · 戴 / test

Documentation/ABI/testing/sysfs-platform-chipidea-usb2

0 → 100644

+9 −0

Original line number	Diff line number	Diff line
		What: /sys/bus/platform/devices/ci_hdrc.0/role
		Date: Mar 2017
		Contact: Peter Chen <peter.chen@nxp.com>
		Description:
		It returns string "gadget" or "host" when read it, it indicates
		current controller role.

		It will do role switch when write "gadget" or "host" to it.
		Only controller at dual-role configuration supports writing.

drivers/usb/chipidea/core.c

+61 −3

Original line number	Diff line number	Diff line
		@@ -841,6 +841,56 @@ static void ci_get_otg_capable(struct ci_hdrc *ci)
		}
		}

		static ssize_t ci_role_show(struct device dev, struct device_attribute attr,
		char *buf)
		{
		struct ci_hdrc *ci = dev_get_drvdata(dev);

		return sprintf(buf, "%s\n", ci_role(ci)->name);
		}

		static ssize_t ci_role_store(struct device *dev,
		struct device_attribute attr, const char buf, size_t n)
		{
		struct ci_hdrc *ci = dev_get_drvdata(dev);
		enum ci_role role;
		int ret;

		if (!(ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])) {
		dev_warn(dev, "Current configuration is not dual-role, quit\n");
		return -EPERM;
		}

		for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
		if (!strncmp(buf, ci->roles[role]->name,
		strlen(ci->roles[role]->name)))
		break;

		if (role == CI_ROLE_END \|\| role == ci->role)
		return -EINVAL;

		pm_runtime_get_sync(dev);
		disable_irq(ci->irq);
		ci_role_stop(ci);
		ret = ci_role_start(ci, role);
		if (!ret && ci->role == CI_ROLE_GADGET)
		ci_handle_vbus_change(ci);
		enable_irq(ci->irq);
		pm_runtime_put_sync(dev);

		return (ret == 0) ? n : ret;
		}
		static DEVICE_ATTR(role, 0644, ci_role_show, ci_role_store);

		static struct attribute *ci_attrs[] = {
		&dev_attr_role.attr,
		NULL,
		};

		static struct attribute_group ci_attr_group = {
		.attrs = ci_attrs,
		};

		static int ci_hdrc_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		@@ -1007,11 +1057,18 @@ static int ci_hdrc_probe(struct platform_device *pdev)
		ci_hdrc_otg_fsm_start(ci);

		device_set_wakeup_capable(&pdev->dev, true);

		ret = dbg_create_files(ci);
		if (!ret)
		if (ret)
		goto stop;

		ret = sysfs_create_group(&dev->kobj, &ci_attr_group);
		if (ret)
		goto remove_debug;

		return 0;

		remove_debug:
		dbg_remove_files(ci);
		stop:
		ci_role_destroy(ci);
		deinit_phy:
		@@ -1033,6 +1090,7 @@ static int ci_hdrc_remove(struct platform_device *pdev)
		}

		dbg_remove_files(ci);
		sysfs_remove_group(&ci->dev->kobj, &ci_attr_group);
		ci_role_destroy(ci);
		ci_hdrc_enter_lpm(ci, true);
		ci_usb_phy_exit(ci);

drivers/usb/chipidea/udc.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1978,6 +1978,8 @@ static void udc_id_switch_for_host(struct ci_hdrc *ci)
		*/
		if (ci->is_otg)
		hw_write_otgsc(ci, OTGSC_BSVIE \| OTGSC_BSVIS, OTGSC_BSVIS);

		ci->vbus_active = 0;
		}

		/**

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