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drivers: usb: common: add common code for usb drivers to use 

Add common usb code which usb drivers makes use of it.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Mugunthan V N 2016-04-12 16:01:19 +05:30 committed by Simon Glass
parent 9300f711ba
commit c0c62d9233
3 changed files with 50 additions and 0 deletions
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1
drivers/usb/common/Makefile
View File

@ -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

40
drivers/usb/common/common.c Normal file
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@ -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;
}

9
include/linux/usb/otg.h
View File

@ -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 */