drivers/usb/dwc3/dwc3-generic.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Generic DWC3 Glue layer
   4  *
   5  * Copyright (C) 2016 - 2018 Xilinx, Inc.
   6  *
   7  * Based on dwc3-omap.c.
   8  */
   9
  10 #include <common.h>
  11 #include <dm.h>
  12 #include <dm/device-internal.h>
  13 #include <dm/lists.h>
  14 #include <linux/usb/otg.h>
  15 #include <linux/compat.h>
  16 #include <linux/usb/ch9.h>
  17 #include <linux/usb/gadget.h>
  18 #include <malloc.h>
  19 #include <usb.h>
  20 #include "core.h"
  21 #include "gadget.h"
  22 #include "linux-compat.h"
  23
  24 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
  25 int dm_usb_gadget_handle_interrupts(struct udevice *dev)
  26 {
  27         struct dwc3 *priv = dev_get_priv(dev);
  28
  29         dwc3_gadget_uboot_handle_interrupt(priv);
  30
  31         return 0;
  32 }
  33
  34 static int dwc3_generic_peripheral_probe(struct udevice *dev)
  35 {
  36         struct dwc3 *priv = dev_get_priv(dev);
  37
  38         return dwc3_init(priv);
  39 }
  40
  41 static int dwc3_generic_peripheral_remove(struct udevice *dev)
  42 {
  43         struct dwc3 *priv = dev_get_priv(dev);
  44
  45         dwc3_remove(priv);
  46
  47         return 0;
  48 }
  49
  50 static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev)
  51 {
  52         struct dwc3 *priv = dev_get_priv(dev);
  53         int node = dev_of_offset(dev);
  54
  55         priv->regs = (void *)devfdt_get_addr(dev);
  56         priv->regs += DWC3_GLOBALS_REGS_START;
  57
  58         priv->maximum_speed = usb_get_maximum_speed(node);
  59         if (priv->maximum_speed == USB_SPEED_UNKNOWN) {
  60                 pr_err("Invalid usb maximum speed\n");
  61                 return -ENODEV;
  62         }
  63
  64         priv->dr_mode = usb_get_dr_mode(node);
  65         if (priv->dr_mode == USB_DR_MODE_UNKNOWN) {
  66                 pr_err("Invalid usb mode setup\n");
  67                 return -ENODEV;
  68         }
  69
  70         return 0;
  71 }
  72
  73 static int dwc3_generic_peripheral_bind(struct udevice *dev)
  74 {
  75         return device_probe(dev);
  76 }
  77
  78 U_BOOT_DRIVER(dwc3_generic_peripheral) = {
  79         .name   = "dwc3-generic-peripheral",
  80         .id     = UCLASS_USB_DEV_GENERIC,
  81         .ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata,
  82         .probe = dwc3_generic_peripheral_probe,
  83         .remove = dwc3_generic_peripheral_remove,
  84         .bind = dwc3_generic_peripheral_bind,
  85         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
  86         .priv_auto_alloc_size = sizeof(struct dwc3),
  87         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
  88 };
  89 #endif
  90
  91 static int dwc3_generic_bind(struct udevice *parent)
  92 {
  93         const void *fdt = gd->fdt_blob;
  94         int node;
  95         int ret;
  96
  97         for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
  98              node = fdt_next_subnode(fdt, node)) {
  99                 const char *name = fdt_get_name(fdt, node, NULL);
 100                 enum usb_dr_mode dr_mode;
 101                 struct udevice *dev;
 102                 const char *driver;
 103
 104                 debug("%s: subnode name: %s\n", __func__, name);
 105                 if (strncmp(name, "dwc3@", 4))
 106                         continue;
 107
 108                 dr_mode = usb_get_dr_mode(node);
 109
 110                 switch (dr_mode) {
 111                 case USB_DR_MODE_PERIPHERAL:
 112                 case USB_DR_MODE_OTG:
 113                         debug("%s: dr_mode: OTG or Peripheral\n", __func__);
 114                         driver = "dwc3-generic-peripheral";
 115                         break;
 116                 case USB_DR_MODE_HOST:
 117                         debug("%s: dr_mode: HOST\n", __func__);
 118                         driver = "dwc3-generic-host";
 119                         break;
 120                 default:
 121                         debug("%s: unsupported dr_mode\n", __func__);
 122                         return -ENODEV;
 123                 };
 124
 125                 ret = device_bind_driver_to_node(parent, driver, name,
 126                                                  offset_to_ofnode(node), &dev);
 127                 if (ret) {
 128                         debug("%s: not able to bind usb device mode\n",
 129                               __func__);
 130                         return ret;
 131                 }
 132         }
 133
 134         return 0;
 135 }
 136
 137 static const struct udevice_id dwc3_generic_ids[] = {
 138         { .compatible = "xlnx,zynqmp-dwc3" },
 139         { }
 140 };
 141
 142 U_BOOT_DRIVER(dwc3_generic_wrapper) = {
 143         .name   = "dwc3-generic-wrapper",
 144         .id     = UCLASS_MISC,
 145         .of_match = dwc3_generic_ids,
 146         .bind = dwc3_generic_bind,
 147 };