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59592b99d8
Add support to get maximum speed from dt so that usb drivers makes use of it for DT parsing. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> (rebase and fix errors) Reviewed-by: Simon Glass <sjg@chromium.org>
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Provides code common for host and device side USB.
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*
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* (C) Copyright 2016
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* Texas Instruments Incorporated, <www.ti.com>
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*/
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#include <common.h>
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#include <linux/libfdt.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/ch9.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const char *const usb_dr_modes[] = {
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[USB_DR_MODE_UNKNOWN] = "",
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[USB_DR_MODE_HOST] = "host",
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[USB_DR_MODE_PERIPHERAL] = "peripheral",
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[USB_DR_MODE_OTG] = "otg",
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};
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enum usb_dr_mode usb_get_dr_mode(int node)
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{
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const void *fdt = gd->fdt_blob;
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const char *dr_mode;
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int i;
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dr_mode = fdt_getprop(fdt, node, "dr_mode", NULL);
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if (!dr_mode) {
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pr_err("usb dr_mode not found\n");
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return USB_DR_MODE_UNKNOWN;
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}
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for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
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if (!strcmp(dr_mode, usb_dr_modes[i]))
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return i;
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return USB_DR_MODE_UNKNOWN;
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}
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static const char *const speed_names[] = {
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[USB_SPEED_UNKNOWN] = "UNKNOWN",
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[USB_SPEED_LOW] = "low-speed",
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[USB_SPEED_FULL] = "full-speed",
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[USB_SPEED_HIGH] = "high-speed",
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[USB_SPEED_WIRELESS] = "wireless",
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[USB_SPEED_SUPER] = "super-speed",
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};
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enum usb_device_speed usb_get_maximum_speed(int node)
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{
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const void *fdt = gd->fdt_blob;
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const char *max_speed;
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int i;
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max_speed = fdt_getprop(fdt, node, "maximum-speed", NULL);
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if (!max_speed) {
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pr_err("usb maximum-speed not found\n");
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return USB_SPEED_UNKNOWN;
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}
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for (i = 0; i < ARRAY_SIZE(speed_names); i++)
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if (!strcmp(max_speed, speed_names[i]))
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return i;
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return USB_SPEED_UNKNOWN;
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}
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