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usb: add support for generic EHCI devices

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This driver is meant to be used with any EHCI-compatible host
controller in case if there's no need for platform-specific
glue such as setup of controller or PHY's power mode via
GPIOs etc.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Marek Vasut <marex@denx.de>
This commit is contained in:
Alexey Brodkin 2015-12-02 12:32:02 +03:00 committed by Marek Vasut
parent 40c920821d
commit 90fbb2823a
3 changed files with 59 additions and 0 deletions
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8
drivers/usb/host/Kconfig
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@ -73,4 +73,12 @@ config USB_EHCI_UNIPHIER
---help---
Enables support for the on-chip EHCI controller on UniPhier SoCs.
config USB_EHCI_GENERIC
bool "Support for generic EHCI USB controller"
depends on OF_CONTROL
depends on DM_USB
default n
---help---
Enables support for generic EHCI controller.
endif

1
drivers/usb/host/Makefile
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@ -32,6 +32,7 @@ else
obj-$(CONFIG_USB_EHCI_FSL) += ehci-fsl.o
endif
obj-$(CONFIG_USB_EHCI_FARADAY) += ehci-faraday.o
obj-$(CONFIG_USB_EHCI_GENERIC) += ehci-generic.o
obj-$(CONFIG_USB_EHCI_EXYNOS) += ehci-exynos.o
obj-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o
obj-$(CONFIG_USB_EHCI_MXS) += ehci-mxs.o

50
drivers/usb/host/ehci-generic.c Normal file
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@ -0,0 +1,50 @@
/*
* Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include "ehci.h"
/*
* Even though here we don't explicitly use "struct ehci_ctrl"
* ehci_register() expects it to be the first thing that resides in
* device's private data.
*/
struct generic_ehci {
struct ehci_ctrl ctrl;
};
static int ehci_usb_probe(struct udevice *dev)
{
struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev);
struct ehci_hcor *hcor;
hcor = (struct ehci_hcor *)((uintptr_t)hccr +
HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
}
static int ehci_usb_remove(struct udevice *dev)
{
return ehci_deregister(dev);
}
static const struct udevice_id ehci_usb_ids[] = {
{ .compatible = "generic-ehci" },
{ }
};
U_BOOT_DRIVER(ehci_generic) = {
.name = "ehci_generic",
.id = UCLASS_USB,
.of_match = ehci_usb_ids,
.probe = ehci_usb_probe,
.remove = ehci_usb_remove,
.ops = &ehci_usb_ops,
.priv_auto_alloc_size = sizeof(struct generic_ehci),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};