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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-22 18:24:38 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-22 18:24:38 -0700
commit9e43643b11695911bb1dd585d9a9f758a5ad4d89 (patch)
treecb9cdcfea0895229fcaceee6bf51d0aa345f5159 /drivers/usb/chipidea/core.c
parenta4d8e93c3182a54d8d21a4d1cec6538ae1be9e16 (diff)
parent851ce932242d5a79bef8fe625fce37cc2f27033e (diff)
Merge tag 'usb-ci-v4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/peter.chen/usb into usb-next
Peter writes: USB Chipidea updates for v4.4-rc1 - Use extcon framework for VBUS and ID detect - Add imx6sx and imx7d support - Other small changes
Diffstat (limited to 'drivers/usb/chipidea/core.c')
-rw-r--r--drivers/usb/chipidea/core.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index bf2599757f55..965d0e240dcb 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -47,6 +47,7 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
+#include <linux/extcon.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/module.h>
@@ -602,9 +603,45 @@ static irqreturn_t ci_irq(int irq, void *data)
return ret;
}
+static int ci_vbus_notifier(struct notifier_block *nb, unsigned long event,
+ void *ptr)
+{
+ struct ci_hdrc_cable *vbus = container_of(nb, struct ci_hdrc_cable, nb);
+ struct ci_hdrc *ci = vbus->ci;
+
+ if (event)
+ vbus->state = true;
+ else
+ vbus->state = false;
+
+ vbus->changed = true;
+
+ ci_irq(ci->irq, ci);
+ return NOTIFY_DONE;
+}
+
+static int ci_id_notifier(struct notifier_block *nb, unsigned long event,
+ void *ptr)
+{
+ struct ci_hdrc_cable *id = container_of(nb, struct ci_hdrc_cable, nb);
+ struct ci_hdrc *ci = id->ci;
+
+ if (event)
+ id->state = false;
+ else
+ id->state = true;
+
+ id->changed = true;
+
+ ci_irq(ci->irq, ci);
+ return NOTIFY_DONE;
+}
+
static int ci_get_platdata(struct device *dev,
struct ci_hdrc_platform_data *platdata)
{
+ struct extcon_dev *ext_vbus, *ext_id;
+ struct ci_hdrc_cable *cable;
int ret;
if (!platdata->phy_mode)
@@ -651,6 +688,10 @@ static int ci_get_platdata(struct device *dev,
if (usb_get_maximum_speed(dev) == USB_SPEED_FULL)
platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
+ if (of_find_property(dev->of_node, "phy-clkgate-delay-us", NULL))
+ of_property_read_u32(dev->of_node, "phy-clkgate-delay-us",
+ &platdata->phy_clkgate_delay_us);
+
platdata->itc_setting = 1;
if (of_find_property(dev->of_node, "itc-setting", NULL)) {
ret = of_property_read_u32(dev->of_node, "itc-setting",
@@ -695,9 +736,91 @@ static int ci_get_platdata(struct device *dev,
platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST;
}
+ ext_id = ERR_PTR(-ENODEV);
+ ext_vbus = ERR_PTR(-ENODEV);
+ if (of_property_read_bool(dev->of_node, "extcon")) {
+ /* Each one of them is not mandatory */
+ ext_vbus = extcon_get_edev_by_phandle(dev, 0);
+ if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV)
+ return PTR_ERR(ext_vbus);
+
+ ext_id = extcon_get_edev_by_phandle(dev, 1);
+ if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV)
+ return PTR_ERR(ext_id);
+ }
+
+ cable = &platdata->vbus_extcon;
+ cable->nb.notifier_call = ci_vbus_notifier;
+ cable->edev = ext_vbus;
+
+ if (!IS_ERR(ext_vbus)) {
+ ret = extcon_get_cable_state_(cable->edev, EXTCON_USB);
+ if (ret)
+ cable->state = true;
+ else
+ cable->state = false;
+ }
+
+ cable = &platdata->id_extcon;
+ cable->nb.notifier_call = ci_id_notifier;
+ cable->edev = ext_id;
+
+ if (!IS_ERR(ext_id)) {
+ ret = extcon_get_cable_state_(cable->edev, EXTCON_USB_HOST);
+ if (ret)
+ cable->state = false;
+ else
+ cable->state = true;
+ }
+ return 0;
+}
+
+static int ci_extcon_register(struct ci_hdrc *ci)
+{
+ struct ci_hdrc_cable *id, *vbus;
+ int ret;
+
+ id = &ci->platdata->id_extcon;
+ id->ci = ci;
+ if (!IS_ERR(id->edev)) {
+ ret = extcon_register_notifier(id->edev, EXTCON_USB_HOST,
+ &id->nb);
+ if (ret < 0) {
+ dev_err(ci->dev, "register ID failed\n");
+ return ret;
+ }
+ }
+
+ vbus = &ci->platdata->vbus_extcon;
+ vbus->ci = ci;
+ if (!IS_ERR(vbus->edev)) {
+ ret = extcon_register_notifier(vbus->edev, EXTCON_USB,
+ &vbus->nb);
+ if (ret < 0) {
+ extcon_unregister_notifier(id->edev, EXTCON_USB_HOST,
+ &id->nb);
+ dev_err(ci->dev, "register VBUS failed\n");
+ return ret;
+ }
+ }
+
return 0;
}
+static void ci_extcon_unregister(struct ci_hdrc *ci)
+{
+ struct ci_hdrc_cable *cable;
+
+ cable = &ci->platdata->id_extcon;
+ if (!IS_ERR(cable->edev))
+ extcon_unregister_notifier(cable->edev, EXTCON_USB_HOST,
+ &cable->nb);
+
+ cable = &ci->platdata->vbus_extcon;
+ if (!IS_ERR(cable->edev))
+ extcon_unregister_notifier(cable->edev, EXTCON_USB, &cable->nb);
+}
+
static DEFINE_IDA(ci_ida);
struct platform_device *ci_hdrc_add_device(struct device *dev,
@@ -921,6 +1044,10 @@ static int ci_hdrc_probe(struct platform_device *pdev)
if (ret)
goto stop;
+ ret = ci_extcon_register(ci);
+ if (ret)
+ goto stop;
+
if (ci->supports_runtime_pm) {
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
@@ -938,6 +1065,7 @@ static int ci_hdrc_probe(struct platform_device *pdev)
if (!ret)
return 0;
+ ci_extcon_unregister(ci);
stop:
ci_role_destroy(ci);
deinit_phy:
@@ -957,6 +1085,7 @@ static int ci_hdrc_remove(struct platform_device *pdev)
}
dbg_remove_files(ci);
+ ci_extcon_unregister(ci);
ci_role_destroy(ci);
ci_hdrc_enter_lpm(ci, true);
ci_usb_phy_exit(ci);
@@ -996,6 +1125,9 @@ static void ci_controller_suspend(struct ci_hdrc *ci)
{
disable_irq(ci->irq);
ci_hdrc_enter_lpm(ci, true);
+ if (ci->platdata->phy_clkgate_delay_us)
+ usleep_range(ci->platdata->phy_clkgate_delay_us,
+ ci->platdata->phy_clkgate_delay_us + 50);
usb_phy_set_suspend(ci->usb_phy, 1);
ci->in_lpm = true;
enable_irq(ci->irq);