From: Michael Grzeschik <m.grzesc...@pengutronix.de> This adds two little devicetree helper functions for determining the dr_mode (host, peripheral, otg) and phy_type (utmi, ulpi,...) from the devicetree.
Signed-off-by: Michael Grzeschik <m.grzesc...@pengutronix.de> Signed-off-by: Marc Kleine-Budde <m...@pengutronix.de> Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de> --- drivers/usb/usb-common.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++ include/linux/usb/of.h | 27 ++++++++++++++++++ include/linux/usb/otg.h | 7 +++++ include/linux/usb/phy.h | 9 ++++++ 4 files changed, 112 insertions(+) create mode 100644 include/linux/usb/of.h diff --git a/drivers/usb/usb-common.c b/drivers/usb/usb-common.c index d29503e..1c0292c 100644 --- a/drivers/usb/usb-common.c +++ b/drivers/usb/usb-common.c @@ -14,6 +14,9 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/usb/ch9.h> +#include <linux/of.h> +#include <linux/usb/of.h> +#include <linux/usb/otg.h> const char *usb_speed_string(enum usb_device_speed speed) { @@ -32,4 +35,70 @@ const char *usb_speed_string(enum usb_device_speed speed) } EXPORT_SYMBOL_GPL(usb_speed_string); +#ifdef CONFIG_OF +static const char *usb_dr_modes[] = { + [USB_DR_MODE_UNKNOWN] = "", + [USB_DR_MODE_HOST] = "host", + [USB_DR_MODE_PERIPHERAL] = "peripheral", + [USB_DR_MODE_OTG] = "otg", +}; + +/** + * of_usb_get_dr_mode - Get dual role mode for given device_node + * @np: Pointer to the given device_node + * + * The function gets phy interface string from property 'dr_mode', + * and returns the correspondig enum usb_phy_dr_mode + */ +enum usb_phy_dr_mode of_usb_get_dr_mode(struct device_node *np) +{ + const char *dr_mode; + int err, i; + + err = of_property_read_string(np, "dr_mode", &dr_mode); + if (err < 0) + return USB_DR_MODE_UNKNOWN; + + for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++) + if (!strcasecmp(dr_mode, usb_dr_modes[i])) + return i; + + return USB_DR_MODE_UNKNOWN; +} +EXPORT_SYMBOL_GPL(of_usb_get_dr_mode); + +static const char *usbphy_modes[] = { + [USBPHY_INTERFACE_MODE_NA] = "", + [USBPHY_INTERFACE_MODE_UTMI] = "utmi", + [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide", + [USBPHY_INTERFACE_MODE_ULPI] = "ulpi", + [USBPHY_INTERFACE_MODE_SERIAL] = "serial", + [USBPHY_INTERFACE_MODE_HSIC] = "hsic", +}; + +/** + * of_get_usbphy_mode - Get phy mode for given device_node + * @np: Pointer to the given device_node + * + * The function gets phy interface string from property 'phy_type', + * and returns the correspondig enum usb_phy_interface + */ +enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np) +{ + const char *phy_type; + int err, i; + + err = of_property_read_string(np, "phy_type", &phy_type); + if (err < 0) + return USBPHY_INTERFACE_MODE_NA; + + for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++) + if (!strcasecmp(phy_type, usbphy_modes[i])) + return i; + + return USBPHY_INTERFACE_MODE_NA; +} +EXPORT_SYMBOL_GPL(of_usb_get_phy_mode); +#endif + MODULE_LICENSE("GPL"); diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h new file mode 100644 index 0000000..53d69da --- /dev/null +++ b/include/linux/usb/of.h @@ -0,0 +1,27 @@ +/* + * OF helpers for usb devices. + * + * This file is released under the GPLv2 + */ + +#ifndef __LINUX_USB_OF_H +#define __LINUX_USB_OF_H + +#include <linux/usb/phy.h> + +#ifdef CONFIG_OF +enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np); +enum usb_phy_dr_mode of_usb_get_dr_mode(struct device_node *np); +#else +static inline enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np) +{ + return USBPHY_INTERFACE_MODE_NA; +} + +static inline enum usb_phy_dr_mode of_usb_get_dr_mode(struct device_node *np) +{ + return USB_DR_MODE_UNKNOWN; +} +#endif + +#endif /* __LINUX_USB_OF_H */ diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index e8a5fe8..9c012f0 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -99,4 +99,11 @@ otg_start_srp(struct usb_otg *otg) /* for OTG controller drivers (and maybe other stuff) */ extern int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num); +enum usb_phy_dr_mode { + USB_DR_MODE_UNKNOWN, + USB_DR_MODE_HOST, + USB_DR_MODE_PERIPHERAL, + USB_DR_MODE_OTG, +}; + #endif /* __LINUX_USB_OTG_H */ diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h index 15847cb..a5170d8 100644 --- a/include/linux/usb/phy.h +++ b/include/linux/usb/phy.h @@ -12,6 +12,15 @@ #include <linux/notifier.h> #include <linux/usb.h> +enum usb_phy_interface { + USBPHY_INTERFACE_MODE_NA, + USBPHY_INTERFACE_MODE_UTMI, + USBPHY_INTERFACE_MODE_UTMIW, + USBPHY_INTERFACE_MODE_ULPI, + USBPHY_INTERFACE_MODE_SERIAL, + USBPHY_INTERFACE_MODE_HSIC, +}; + enum usb_phy_events { USB_EVENT_NONE, /* no events or cable disconnected */ USB_EVENT_VBUS, /* vbus valid event */ -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html