On Wed, Mar 12, 2014 at 04:03:34PM +0800, Li Jun wrote:
> On Thu, Mar 06, 2014 at 12:44:16PM +0800, Peter Chen wrote:
> > On Thu, Feb 27, 2014 at 07:38:28AM +0800, Li Jun wrote:
> > > 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 | 1 +
> > > drivers/usb/chipidea/otg_fsm.c | 192 ++++++++++++++++++++++++++++++++++++++++
> > > drivers/usb/chipidea/otg_fsm.h | 6 ++
> > > 3 files changed, 199 insertions(+)
> > >
> > > diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
> > > index 4fb33a2..6c10b91 100644
> > > --- a/drivers/usb/chipidea/otg.c
> > > +++ b/drivers/usb/chipidea/otg.c
> > > @@ -129,4 +129,5 @@ void ci_hdrc_otg_destroy(struct ci_hdrc *ci)
> > > }
> > > ci_disable_otg_interrupt(ci, OTGSC_INT_EN_BITS);
> > > ci_clear_otg_interrupt(ci, OTGSC_INT_STATUS_BITS);
> > > + ci_hdrc_otg_fsm_remove(ci);
> > > }
> > > diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
> > > index 0601058..0e980f1 100644
> > > --- a/drivers/usb/chipidea/otg_fsm.c
> > > +++ b/drivers/usb/chipidea/otg_fsm.c
> > > @@ -41,6 +41,185 @@ 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;
> > > +
> > > + if (ci->transceiver && ci->transceiver->otg && ci->fsm) {
> > > + t = scnprintf(next, size, "%d\n", ci->fsm->a_bus_req);
> > > + size -= t;
> > > + next += t;
> > > + } else
> > > + dev_err(ci->dev, "error: otg setup is not completed!\n");
> > > +
> > > + 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 (ci->transceiver && ci->transceiver->otg && ci->fsm) {
> > > + 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)
> > > + goto end;
> > > + ci->fsm->a_bus_req = 1;
> > > + }
> > > +
> > > + disable_irq_nosync(ci->irq);
> > > + queue_work(ci->wq, &ci->work);
> > > + } else
> > > + dev_err(ci->dev, "error: otg setup is not completed!\n");
> > > +end:
> > > + 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;
> > > + if (ci->transceiver && ci->transceiver->otg && ci->fsm) {
> > > + t = scnprintf(next, size, "%d\n", ci->fsm->a_bus_drop);
> > > + size -= t;
> > > + next += t;
> > > + } else
> > > + dev_err(ci->dev, "error: otg setup is not completed!\n");
> > > +
> > > + 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 (ci->transceiver && ci->transceiver->otg && ci->fsm) {
> > > + 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;
> > > +
> > > + if (ci->transceiver && ci->transceiver->otg && ci->fsm) {
> > > + 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 (ci->transceiver && ci->transceiver->otg && ci->fsm) {
> > > + 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 (ci->transceiver && ci->transceiver->otg && ci->fsm) {
> > > + 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 */
> > > static void ci_otg_add_timer(struct ci_hdrc *ci, enum ci_otg_fsm_timer_index t)
> > > {
> > > @@ -666,6 +845,13 @@ 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 */
> > > ci_enable_otg_interrupt(ci, OTGSC_AVVIE);
> > >
> > > @@ -678,3 +864,9 @@ int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
> > >
> > > return 0;
> > > }
> > > +
> > > +void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci)
> > > +{
> > > + if (ci->platdata->dr_mode == USB_DR_MODE_OTG)
> > > + sysfs_remove_group(&ci->dev->kobj, &inputs_attr_group);
> > > +}
> >
> > - The name is not good, the user can't know it is related to sys entry
> you mean the function name "ci_hdrc_otg_fsm_remove"?
> it's defined like this for possible more operations in driver removal.
Ok.
>
> > - What will occur if the OTG_FSM is not defined?
> This function is empty if OTG_FSM is not defined.
Ok
--
Best Regards,
Peter Chen
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