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usb: chipidea: add sys inputs for OTG fsm input

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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: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li Jun 2014-04-23 15:56:51 +08:00 committed by Greg Kroah-Hartman
parent 4dcf720c5d
commit 15f75defac
3 changed files with 181 additions and 0 deletions
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2
drivers/usb/chipidea/otg.c
View file

@ -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);
}

173
drivers/usb/chipidea/otg_fsm.c
View file

@ -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
*/
@ -676,6 +837,13 @@ 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);
@ -690,3 +858,8 @@ 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);
}

6
drivers/usb/chipidea/otg_fsm.h
View file

@ -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 */