diff options
author | Jagan Teki <jagan@amarulasolutions.com> | 2018-05-07 10:33:27 +0300 |
---|---|---|
committer | Jagan Teki <jagan@amarulasolutions.com> | 2018-05-28 14:10:43 +0300 |
commit | 129c45c72872cf82dde44024864a517267aed68a (patch) | |
tree | 99722441279923eea438099c0a5e8d6d67c076d9 | |
parent | 6768594326eb358de06772febc06f87fea0a9483 (diff) | |
download | u-boot-129c45c72872cf82dde44024864a517267aed68a.tar.xz |
phy: sun4i-usb: Add id_detect and vbus_detect ops
ID and VBUS detection code require when musb changing
between Host and/or Peripheral modes.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Jun Nie <jun.nie@linaro.org>
-rw-r--r-- | drivers/phy/allwinner/phy-sun4i-usb.c | 39 | ||||
-rw-r--r-- | include/phy-sun4i-usb.h | 26 |
2 files changed, 65 insertions, 0 deletions
diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c index 78304c1f22..7f2970b96b 100644 --- a/drivers/phy/allwinner/phy-sun4i-usb.c +++ b/drivers/phy/allwinner/phy-sun4i-usb.c @@ -14,6 +14,7 @@ #include <dm.h> #include <dm/device.h> #include <generic-phy.h> +#include <phy-sun4i-usb.h> #include <asm/gpio.h> #include <asm/io.h> #include <asm/arch/clock.h> @@ -295,6 +296,44 @@ static int sun4i_usb_phy_xlate(struct phy *phy, return 0; } +int sun4i_usb_phy_vbus_detect(struct phy *phy) +{ + struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev); + struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id]; + int err, retries = 3; + + debug("%s: id_det = %d\n", __func__, usb_phy->gpio_id_det); + + if (usb_phy->gpio_vbus_det < 0) + return usb_phy->gpio_vbus_det; + + err = gpio_get_value(usb_phy->gpio_vbus_det); + /* + * Vbus may have been provided by the board and just been turned of + * some milliseconds ago on reset, what we're measuring then is a + * residual charge on Vbus, sleep a bit and try again. + */ + while (err > 0 && retries--) { + mdelay(100); + err = gpio_get_value(usb_phy->gpio_vbus_det); + } + + return err; +} + +int sun4i_usb_phy_id_detect(struct phy *phy) +{ + struct sun4i_usb_phy_data *data = dev_get_priv(phy->dev); + struct sun4i_usb_phy_plat *usb_phy = &data->usb_phy[phy->id]; + + debug("%s: id_det = %d\n", __func__, usb_phy->gpio_id_det); + + if (usb_phy->gpio_id_det < 0) + return usb_phy->gpio_id_det; + + return gpio_get_value(usb_phy->gpio_id_det); +} + static struct phy_ops sun4i_usb_phy_ops = { .of_xlate = sun4i_usb_phy_xlate, .init = sun4i_usb_phy_init, diff --git a/include/phy-sun4i-usb.h b/include/phy-sun4i-usb.h new file mode 100644 index 0000000000..040e9d3750 --- /dev/null +++ b/include/phy-sun4i-usb.h @@ -0,0 +1,26 @@ +/* + * Copyright (C) 2017 Jagan Teki <jagan@amarulasolutions.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __GENERIC_PHY_SUN4I_USB_H +#define __GENERIC_PHY_SUN4I_USB_H + +/** + * sun4i_usb_phy_id_detect - detect ID pin of USB PHY + * + * @phy: USB PHY port to detect ID pin + * @return 0 if OK, or a negative error code + */ +int sun4i_usb_phy_id_detect(struct phy *phy); + +/** + * sun4i_usb_phy_vbus_detect - detect VBUS pin of USB PHY + * + * @phy: USB PHY port to detect VBUS pin + * @return 0 if OK, or a negative error code + */ +int sun4i_usb_phy_vbus_detect(struct phy *phy); + +#endif /*__GENERIC_PHY_SUN4I_USB_H */ |