diff options
| -rw-r--r-- | drivers/usb/common/Makefile | 1 | ||||
| -rw-r--r-- | drivers/usb/common/common.c | 40 | ||||
| -rw-r--r-- | include/linux/usb/otg.h | 9 |
3 files changed, 50 insertions, 0 deletions
diff --git a/drivers/usb/common/Makefile b/drivers/usb/common/Makefile index 2f3d43d..2f46d38 100644 --- a/drivers/usb/common/Makefile +++ b/drivers/usb/common/Makefile @@ -3,5 +3,6 @@ # SPDX-License-Identifier: GPL-2.0+ # +obj-$(CONFIG_DM_USB) += common.o obj-$(CONFIG_USB_EHCI_FSL) += fsl-dt-fixup.o obj-$(CONFIG_USB_XHCI_FSL) += fsl-dt-fixup.o diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c new file mode 100644 index 0000000..35c2dc1 --- /dev/null +++ b/drivers/usb/common/common.c @@ -0,0 +1,40 @@ +/* + * Provides code common for host and device side USB. + * + * (C) Copyright 2016 + * Texas Instruments Incorporated, <www.ti.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <libfdt.h> +#include <linux/usb/otg.h> + +DECLARE_GLOBAL_DATA_PTR; + +static const char *const usb_dr_modes[] = { + [USB_DR_MODE_UNKNOWN] = "", + [USB_DR_MODE_HOST] = "host", + [USB_DR_MODE_PERIPHERAL] = "peripheral", + [USB_DR_MODE_OTG] = "otg", +}; + +enum usb_dr_mode usb_get_dr_mode(int node) +{ + const void *fdt = gd->fdt_blob; + const char *dr_mode; + int i; + + dr_mode = fdt_getprop(fdt, node, "dr_mode", NULL); + if (!dr_mode) { + error("usb dr_mode not found\n"); + return USB_DR_MODE_UNKNOWN; + } + + for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++) + if (!strcmp(dr_mode, usb_dr_modes[i])) + return i; + + return USB_DR_MODE_UNKNOWN; +} diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index 7ec5550..8f8ac6a 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -17,4 +17,13 @@ enum usb_dr_mode { USB_DR_MODE_OTG, }; +/** + * usb_get_dr_mode() - Get dual role mode for given device + * @node: Node offset to the given device + * + * The function gets phy interface string from property 'dr_mode', + * and returns the correspondig enum usb_dr_mode + */ +enum usb_dr_mode usb_get_dr_mode(int node); + #endif /* __LINUX_USB_OTG_H */ |