Hi Shimoda-san,
On Wed, Mar 29, 2017 at 1:42 PM, Yoshihiro Shimoda
<[email protected]> wrote:
> --- a/drivers/usb/gadget/udc/renesas_usb3.c
> +++ b/drivers/usb/gadget/udc/renesas_usb3.c
> @@ -568,12 +573,29 @@ static void usb3_mode_a_host(struct renesas_usb3 *usb3)
> usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
> }
>
> +static void usb3_mode_a_peri(struct renesas_usb3 *usb3)
> +{
> + unsigned long flags;
> +
> + spin_lock_irqsave(&usb3->lock, flags);
> + usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
> + usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
> + usb3_connect(usb3);
> + spin_unlock_irqrestore(&usb3->lock, flags);
> +}
> +
> static void usb3_mode_b_peri(struct renesas_usb3 *usb3)
> {
> usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
> usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
> }
>
> +static void usb3_mode_b_host(struct renesas_usb3 *usb3)
> +{
> + usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
> + usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
> +}
> +
> static bool usb3_is_a_device(struct renesas_usb3 *usb3)
> {
> return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON);
> @@ -1831,11 +1853,59 @@ static int renesas_usb3_set_selfpowered(struct
> usb_gadget *gadget, int is_self)
> .set_selfpowered = renesas_usb3_set_selfpowered,
> };
>
> +static ssize_t role_store(struct device *dev, struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + if (new_mode_is_host) {
> + if (usb3_is_a_device(usb3))
> + usb3_mode_a_host(usb3);
> + else
> + usb3_mode_b_host(usb3);
> + } else {
> + if (usb3_is_a_device(usb3))
> + usb3_mode_a_peri(usb3);
> + else
> + usb3_mode_b_peri(usb3);
> + }
Given the similarity of the usb3_mode_X_{host,peri}() functions, I'm wondering
if the code would become easier to read and maintain by merging them pairwise
into usb3_mode_X_config(), and writing the above block like:
if (usb3_is_a_device(usb3))
usb3_mode_a_config(usb3, new_mode_is_host);
else
usb3_mode_b_config(usb3, new_mode_is_host);
?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
