From: Li Jun <b47624@xxxxxxxxxxxxx>
This patch adds sys input to control and show OTG fsm inputs by application,
user can do host and preipheral role switch by change these inputs.
Signed-off-by: Li Jun <b47624@xxxxxxxxxxxxx>
---
drivers/usb/chipidea/otg.c | 2 +
drivers/usb/chipidea/otg_fsm.c | 173 ++++++++++++++++++++++++++++++++++++++++
drivers/usb/chipidea/otg_fsm.h | 6 ++
3 files changed, 181 insertions(+)
diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
index 38e340c..a048b08 100644
--- a/drivers/usb/chipidea/otg.c
+++ b/drivers/usb/chipidea/otg.c
@@ -141,4 +141,6 @@ void ci_hdrc_otg_destroy(struct ci_hdrc *ci)
/* Disable all OTG irq and clear status */
hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS,
OTGSC_INT_STATUS_BITS);
+ if (ci_otg_is_fsm_mode(ci))
+ ci_hdrc_otg_fsm_remove(ci);
}
diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
index 3542205..b3207d2 100644
--- a/drivers/usb/chipidea/otg_fsm.c
+++ b/drivers/usb/chipidea/otg_fsm.c
@@ -46,6 +46,167 @@ static struct ci_otg_fsm_timer *otg_timer_initializer
return timer;
}
+/* Add for otg: interact with user space app */
+static ssize_t
+get_a_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ char *next;
+ unsigned size, t;
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+ next = buf;
+ size = PAGE_SIZE;
+ t = scnprintf(next, size, "%d\n", ci->fsm.a_bus_req);
+ size -= t;
+ next += t;
+
+ return PAGE_SIZE - size;
+}
+
+static ssize_t
+set_a_bus_req(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+ if (count > 2)
+ return -1;
+
+ mutex_lock(&ci->fsm.lock);
+ if (buf[0] == '0') {
+ ci->fsm.a_bus_req = 0;
+ } else if (buf[0] == '1') {
+ /* If a_bus_drop is TRUE, a_bus_req can't be set */
+ if (ci->fsm.a_bus_drop) {
+ mutex_unlock(&ci->fsm.lock);
+ return count;
+ }
+ ci->fsm.a_bus_req = 1;
+ }
+
+ disable_irq_nosync(ci->irq);
+ queue_work(ci->wq, &ci->work);
+ mutex_unlock(&ci->fsm.lock);
+
+ return count;
+}
+static DEVICE_ATTR(a_bus_req, S_IRUGO | S_IWUSR, get_a_bus_req, set_a_bus_req);
+
+static ssize_t
+get_a_bus_drop(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ char *next;
+ unsigned size, t;
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+ next = buf;
+ size = PAGE_SIZE;
+ t = scnprintf(next, size, "%d\n", ci->fsm.a_bus_drop);
+ size -= t;
+ next += t;
+
+ return PAGE_SIZE - size;
+}
+
+static ssize_t
+set_a_bus_drop(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+ if (count > 2)
+ return -1;
+
+ mutex_lock(&ci->fsm.lock);
+ if (buf[0] == '0') {
+ ci->fsm.a_bus_drop = 0;
+ } else if (buf[0] == '1') {
+ ci->fsm.a_bus_drop = 1;
+ ci->fsm.a_bus_req = 0;
+ }
+
+ disable_irq_nosync(ci->irq);
+ queue_work(ci->wq, &ci->work);
+ mutex_unlock(&ci->fsm.lock);
+
+ return count;
+}
+static DEVICE_ATTR(a_bus_drop, S_IRUGO | S_IWUSR, get_a_bus_drop,
+ set_a_bus_drop);
+
+static ssize_t
+get_b_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ char *next;
+ unsigned size, t;
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+ next = buf;
+ size = PAGE_SIZE;
+ t = scnprintf(next, size, "%d\n", ci->fsm.b_bus_req);
+ size -= t;
+ next += t;
+
+ return PAGE_SIZE - size;
+}
+
+static ssize_t
+set_b_bus_req(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+ if (count > 2)
+ return -1;
+
+ mutex_lock(&ci->fsm.lock);
+ if (buf[0] == '0')
+ ci->fsm.b_bus_req = 0;
+ else if (buf[0] == '1')
+ ci->fsm.b_bus_req = 1;
+
+ disable_irq_nosync(ci->irq);
+ queue_work(ci->wq, &ci->work);
+ mutex_unlock(&ci->fsm.lock);
+
+ return count;
+}
+static DEVICE_ATTR(b_bus_req, S_IRUGO | S_IWUSR, get_b_bus_req, set_b_bus_req);
+
+static ssize_t
+set_a_clr_err(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci_hdrc *ci = dev_get_drvdata(dev);
+
+ if (count > 2)
+ return -1;
+
+ mutex_lock(&ci->fsm.lock);
+ if (buf[0] == '1')
+ ci->fsm.a_clr_err = 1;
+
+ disable_irq_nosync(ci->irq);
+ queue_work(ci->wq, &ci->work);
+ mutex_unlock(&ci->fsm.lock);
+
+ return count;
+}
+static DEVICE_ATTR(a_clr_err, S_IWUSR, NULL, set_a_clr_err);
+
+static struct attribute *inputs_attrs[] = {
+ &dev_attr_a_bus_req.attr,
+ &dev_attr_a_bus_drop.attr,
+ &dev_attr_b_bus_req.attr,
+ &dev_attr_a_clr_err.attr,
+ NULL,
+};
+
+static struct attribute_group inputs_attr_group = {
+ .name = "inputs",
+ .attrs = inputs_attrs,
+};
+
/*
* Add timer to active timer list
*/
@@ -665,6 +826,13 @@ int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
return retval;
}
+ retval = sysfs_create_group(&ci->dev->kobj, &inputs_attr_group);
+ if (retval < 0) {
+ dev_dbg(ci->dev,
+ "Can't register sysfs attr group: %d\n", retval);
+ return retval;
+ }
+
/* Enable A vbus valid irq */
hw_write_otgsc(ci, OTGSC_AVVIE, OTGSC_AVVIE);
@@ -679,3 +847,8 @@ int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
return 0;
}
+
+void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci)
+{
+ sysfs_remove_group(&ci->dev->kobj, &inputs_attr_group);
+}
diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
index 6ec8247..94c085f 100644
--- a/drivers/usb/chipidea/otg_fsm.h
+++ b/drivers/usb/chipidea/otg_fsm.h
@@ -95,6 +95,7 @@ int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci);
int ci_otg_fsm_work(struct ci_hdrc *ci);
irqreturn_t ci_otg_fsm_irq(struct ci_hdrc *ci);
void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci);
+void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci);
#else
@@ -118,6 +119,11 @@ static inline void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
}
+static inline void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci)
+{
+
+}
+
#endif
#endif /* __DRIVERS_USB_CHIPIDEA_OTG_FSM_H */
--
1.7.9.5
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