diff options
Diffstat (limited to 'drivers/phy/renesas/phy-rcar-gen3-usb2.c')
| -rw-r--r-- | drivers/phy/renesas/phy-rcar-gen3-usb2.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c index e00e99a96b68..00a830344d6c 100644 --- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c +++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c @@ -219,33 +219,40 @@ static bool rcar_gen3_is_host(struct rcar_gen3_chan *ch) return !(readl(ch->base + USB2_COMMCTRL) & USB2_COMMCTRL_OTG_PERI); } +static enum phy_mode rcar_gen3_get_phy_mode(struct rcar_gen3_chan *ch) +{ + if (rcar_gen3_is_host(ch)) + return PHY_MODE_USB_HOST; + + return PHY_MODE_USB_DEVICE; +} + static ssize_t role_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct rcar_gen3_chan *ch = dev_get_drvdata(dev); - bool is_b_device, is_host, new_mode_is_host; + bool is_b_device; + enum phy_mode cur_mode, new_mode; if (!ch->has_otg || !ch->phy->init_count) return -EIO; - /* - * is_b_device: true is B-Device. false is A-Device. - * If {new_mode_}is_host: true is Host mode. false is Peripheral mode. - */ - is_b_device = rcar_gen3_check_id(ch); - is_host = rcar_gen3_is_host(ch); if (!strncmp(buf, "host", strlen("host"))) - new_mode_is_host = true; + new_mode = PHY_MODE_USB_HOST; else if (!strncmp(buf, "peripheral", strlen("peripheral"))) - new_mode_is_host = false; + new_mode = PHY_MODE_USB_DEVICE; else return -EINVAL; + /* is_b_device: true is B-Device. false is A-Device. */ + is_b_device = rcar_gen3_check_id(ch); + cur_mode = rcar_gen3_get_phy_mode(ch); + /* If current and new mode is the same, this returns the error */ - if (is_host == new_mode_is_host) + if (cur_mode == new_mode) return -EINVAL; - if (new_mode_is_host) { /* And is_host must be false */ + if (new_mode == PHY_MODE_USB_HOST) { /* And is_host must be false */ if (!is_b_device) /* A-Peripheral */ rcar_gen3_init_from_a_peri_to_a_host(ch); else /* B-Peripheral */ |