[U-Boot] [PATCH 3/6] usb: dwc3: Add generic DWC3 glue logic driver
Marek Vasut
marex at denx.de
Wed May 16 14:41:34 UTC 2018
On 05/16/2018 04:26 PM, Michal Simek wrote:
> By enabling BLK by default this is the next driver which needs to get
> support for DM_USB. Adding generic DWC3 glue logic which only
> parse nodes and read device mode. Based on it probe proper
> host/peripheral DWC3 drivers for it.
>
> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
> ---
>
> drivers/usb/dwc3/Kconfig | 6 ++
> drivers/usb/dwc3/Makefile | 1 +
> drivers/usb/dwc3/dwc3-generic.c | 165 ++++++++++++++++++++++++++++++++
> 3 files changed, 172 insertions(+)
> create mode 100644 drivers/usb/dwc3/dwc3-generic.c
>
> diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
> index ae7fc1c6304d..943b7630eba4 100644
> --- a/drivers/usb/dwc3/Kconfig
> +++ b/drivers/usb/dwc3/Kconfig
> @@ -37,6 +37,12 @@ config USB_DWC3_OMAP
>
> Say 'Y' here if you have one such device
>
> +config USB_DWC3_GENERIC
> + bool "Xilinx ZynqMP and similar Platforms"
> + depends on DM_USB && USB_DWC3
> + help
> + Some platforms can reuse this DWC3 generic implementation.
> +
> config USB_DWC3_UNIPHIER
> bool "DesignWare USB3 Host Support on UniPhier Platforms"
> depends on ARCH_UNIPHIER && USB_XHCI_DWC3
> diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
> index cd18b8d9ec02..60b5515a67da 100644
> --- a/drivers/usb/dwc3/Makefile
> +++ b/drivers/usb/dwc3/Makefile
> @@ -7,6 +7,7 @@ dwc3-y := core.o
> obj-$(CONFIG_USB_DWC3_GADGET) += gadget.o ep0.o
>
> obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o
> +obj-$(CONFIG_USB_DWC3_GENERIC) += dwc3-generic.o
> obj-$(CONFIG_USB_DWC3_UNIPHIER) += dwc3-uniphier.o
> obj-$(CONFIG_USB_DWC3_PHY_OMAP) += ti_usb_phy.o
> obj-$(CONFIG_USB_DWC3_PHY_SAMSUNG) += samsung_usb_phy.o
> diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
> new file mode 100644
> index 000000000000..7dd2555c2042
> --- /dev/null
> +++ b/drivers/usb/dwc3/dwc3-generic.c
> @@ -0,0 +1,165 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Generic DWC3 Glue layer
> + *
> + * Copyright (C) 2016 - 2018 Xilinx, Inc.
> + *
> + * Based on dwc3-omap.c.
> + */
> +
> +#include <common.h>
> +#include <dm.h>
> +#include <dm/device-internal.h>
> +#include <dm/lists.h>
> +#include <linux/usb/otg.h>
> +#include <linux/compat.h>
> +#include <linux/usb/ch9.h>
> +#include <linux/usb/gadget.h>
> +#include <malloc.h>
> +#include <usb.h>
> +#include "core.h"
> +#include "gadget.h"
> +#include "linux-compat.h"
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +int usb_gadget_handle_interrupts(int index)
> +{
> + struct dwc3 *priv;
> + struct udevice *dev;
> + int ret;
> +
> + ret = uclass_first_device(UCLASS_USB_DEV_GENERIC, &dev);
> + if (!dev || ret) {
> + pr_err("No USB device found\n");
> + return -ENODEV;
> + }
> +
> + priv = dev_get_priv(dev);
> +
> + dwc3_gadget_uboot_handle_interrupt(priv);
> +
> + return 0;
> +}
> +
> +static int dwc3_generic_peripheral_probe(struct udevice *dev)
> +{
> + struct dwc3 *priv = dev_get_priv(dev);
> +
> + return dwc3_init(priv);
> +}
> +
> +static int dwc3_generic_peripheral_remove(struct udevice *dev)
> +{
> + struct dwc3 *priv = dev_get_priv(dev);
> +
> + dwc3_remove(priv);
> +
> + return 0;
> +}
> +
> +static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev)
> +{
> + struct dwc3 *priv = dev_get_priv(dev);
> + int node = dev_of_offset(dev);
> +
> + priv->regs = (void *)devfdt_get_addr(dev);
> + priv->regs += DWC3_GLOBALS_REGS_START;
> +
> + priv->maximum_speed = usb_get_maximum_speed(node);
> + if (priv->maximum_speed == USB_SPEED_UNKNOWN) {
> + pr_err("Invalid usb maximum speed\n");
> + return -ENODEV;
> + }
> +
> + priv->dr_mode = usb_get_dr_mode(node);
> + if (priv->dr_mode == USB_DR_MODE_UNKNOWN) {
> + pr_err("Invalid usb mode setup\n");
> + return -ENODEV;
> + }
> +
> + return 0;
> +}
> +
> +static int dwc3_generic_peripheral_bind(struct udevice *dev)
> +{
> + return device_probe(dev);
> +}
> +
> +U_BOOT_DRIVER(dwc3_generic_peripheral) = {
> + .name = "dwc3-generic-peripheral",
> + .id = UCLASS_USB_DEV_GENERIC,
> + .ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata,
> + .probe = dwc3_generic_peripheral_probe,
> + .remove = dwc3_generic_peripheral_remove,
> + .bind = dwc3_generic_peripheral_bind,
> + .platdata_auto_alloc_size = sizeof(struct usb_platdata),
> + .priv_auto_alloc_size = sizeof(struct dwc3),
> + .flags = DM_FLAG_ALLOC_PRIV_DMA,
> +};
> +
> +static int dwc3_generic_bind(struct udevice *parent)
> +{
> + const void *fdt = gd->fdt_blob;
> + int node;
> + int ret;
> +
> + for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
> + node = fdt_next_subnode(fdt, node)) {
> + const char *name = fdt_get_name(fdt, node, NULL);
> + enum usb_dr_mode dr_mode;
> + struct udevice *dev;
> +
> + debug("%s: subnode name: %s\n", __func__, name);
> + if (strncmp(name, "dwc3@", 4))
> + continue;
> +
> + dr_mode = usb_get_dr_mode(node);
> +
> + switch (dr_mode) {
> + case USB_DR_MODE_PERIPHERAL:
> + case USB_DR_MODE_OTG:
> + debug("%s: dr_mode: OTG or Peripheral\n", __func__);
> + ret = device_bind_driver_to_node(parent,
> + "dwc3-generic-peripheral",
> + name,
> + offset_to_ofnode(node),
> + &dev);
> + if (ret) {
> + debug("%s: not able to bind usb device mode\n",
> + __func__);
> + return ret;
> + }
> + break;
> + case USB_DR_MODE_HOST:
> + debug("%s: dr_mode: HOST\n", __func__);
> + ret = device_bind_driver_to_node(parent,
> + "dwc3-generic-host",
> + name,
> + offset_to_ofnode(node),
> + &dev);
Can you somehow improve this indent hell ?
> + if (ret) {
> + debug("%s: not able to bind usb host mode\n",
> + __func__);
> + return ret;
> + }
> + break;
> + default:
> + break;
> + };
> + }
> +
> + return 0;
> +}
> +
> +static const struct udevice_id dwc3_generic_ids[] = {
> + { .compatible = "xlnx,zynqmp-dwc3" },
> + { }
> +};
> +
> +U_BOOT_DRIVER(dwc3_generic_wrapper) = {
> + .name = "dwc3-generic-wrapper",
> + .id = UCLASS_MISC,
> + .of_match = dwc3_generic_ids,
> + .bind = dwc3_generic_bind,
> +};
>
--
Best regards,
Marek Vasut
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