On Wed, Mar 19, 2014 at 06:01:41PM +0800, Li Jun wrote:
> From: Li Jun <[email protected]>
>
> 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 <[email protected]>
> ---
> drivers/usb/chipidea/otg.c | 1 +
> drivers/usb/chipidea/otg_fsm.c | 174
> ++++++++++++++++++++++++++++++++++++++++
> 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 5098982..6de2f76 100644
> --- a/drivers/usb/chipidea/otg.c
> +++ b/drivers/usb/chipidea/otg.c
> @@ -144,4 +144,5 @@ 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);
> + ci_hdrc_otg_fsm_remove(ci);
> }
> diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
> index 569f208..fc0c6ce 100644
> --- a/drivers/usb/chipidea/otg_fsm.c
> +++ b/drivers/usb/chipidea/otg_fsm.c
> @@ -41,6 +41,167 @@ 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
> */
> @@ -662,6 +823,13 @@ 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);
>
> @@ -674,3 +842,9 @@ 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);
> +}
An inline function for otg
> diff --git a/drivers/usb/chipidea/otg_fsm.h b/drivers/usb/chipidea/otg_fsm.h
> index 8ce7356..94fc820 100644
> --- a/drivers/usb/chipidea/otg_fsm.h
> +++ b/drivers/usb/chipidea/otg_fsm.h
> @@ -88,6 +88,7 @@ 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
>
> @@ -111,6 +112,11 @@ static void ci_hdrc_otg_fsm_start(struct ci_hdrc *ci)
>
> }
>
> +static void ci_hdrc_otg_fsm_remove(struct ci_hdrc *ci)
> +{
> +
> +}
> +
> #endif
>
> #endif /* __DRIVERS_USB_CHIPIDEA_OTG_FSM_H */
> --
> 1.7.9.5
>
>
--
Best Regards,
Peter Chen
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