Similarly to Linux kernel it's nice to have generic driver for
EHCI-compatible host controllers.
This implementation is very minimalistic and doesn't have any
platform-specific glue code nor phy-related operations.
For example this allows usage of USB-storage devices with
Synopsys DesignWare AXS10x boards.
Signed-off-by: Alexey Brodkin <abrod...@synopsys.com>
Cc: Stephen Warren <swar...@nvidia.com>
Cc: Simon Glass <s...@chromium.org>
Cc: Marek Vasut <ma...@denx.de>
---
drivers/usb/host/Kconfig | 7 +++++
drivers/usb/host/Makefile | 1 +
drivers/usb/host/ehci-generic.c | 57 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 65 insertions(+)
create mode 100644 drivers/usb/host/ehci-generic.c
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 2a2bffe..a500578 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -73,4 +73,11 @@ 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
+ default y
+ ---help---
+ Enables support for generic EHCI controller.
+
endif
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index f70f38c..b9b4471 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -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
diff --git a/drivers/usb/host/ehci-generic.c b/drivers/usb/host/ehci-generic.c
new file mode 100644
index 0000000..c57ddef
--- /dev/null
+++ b/drivers/usb/host/ehci-generic.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2015 Alexey Brodkin <abrod...@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 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 *)((uint32_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)
+{
+ int ret;
+
+ ret = ehci_deregister(dev);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct udevice_id ehci_usb_ids[] = {
+ { .compatible = "generic-ehci" },
+ { }
+};
+
+U_BOOT_DRIVER(usb_ehci) = {
+ .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,
+};
+
--
2.4.3
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