ca63eac3d98e11a997f1f5f30d097e2373e4c9a0
[oweals/u-boot.git] / 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 DECLARE_GLOBAL_DATA_PTR;
25
26 int usb_gadget_handle_interrupts(int index)
27 {
28         struct dwc3 *priv;
29         struct udevice *dev;
30         int ret;
31
32         ret = uclass_first_device(UCLASS_USB_DEV_GENERIC, &dev);
33         if (!dev || ret) {
34                 pr_err("No USB device found\n");
35                 return -ENODEV;
36         }
37
38         priv = dev_get_priv(dev);
39
40         dwc3_gadget_uboot_handle_interrupt(priv);
41
42         return 0;
43 }
44
45 static int dwc3_generic_peripheral_probe(struct udevice *dev)
46 {
47         struct dwc3 *priv = dev_get_priv(dev);
48
49         return dwc3_init(priv);
50 }
51
52 static int dwc3_generic_peripheral_remove(struct udevice *dev)
53 {
54         struct dwc3 *priv = dev_get_priv(dev);
55
56         dwc3_remove(priv);
57
58         return 0;
59 }
60
61 static int dwc3_generic_peripheral_ofdata_to_platdata(struct udevice *dev)
62 {
63         struct dwc3 *priv = dev_get_priv(dev);
64         int node = dev_of_offset(dev);
65
66         priv->regs = (void *)devfdt_get_addr(dev);
67         priv->regs += DWC3_GLOBALS_REGS_START;
68
69         priv->maximum_speed = usb_get_maximum_speed(node);
70         if (priv->maximum_speed == USB_SPEED_UNKNOWN) {
71                 pr_err("Invalid usb maximum speed\n");
72                 return -ENODEV;
73         }
74
75         priv->dr_mode = usb_get_dr_mode(node);
76         if (priv->dr_mode == USB_DR_MODE_UNKNOWN) {
77                 pr_err("Invalid usb mode setup\n");
78                 return -ENODEV;
79         }
80
81         return 0;
82 }
83
84 static int dwc3_generic_peripheral_bind(struct udevice *dev)
85 {
86         return device_probe(dev);
87 }
88
89 U_BOOT_DRIVER(dwc3_generic_peripheral) = {
90         .name   = "dwc3-generic-peripheral",
91         .id     = UCLASS_USB_DEV_GENERIC,
92         .ofdata_to_platdata = dwc3_generic_peripheral_ofdata_to_platdata,
93         .probe = dwc3_generic_peripheral_probe,
94         .remove = dwc3_generic_peripheral_remove,
95         .bind = dwc3_generic_peripheral_bind,
96         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
97         .priv_auto_alloc_size = sizeof(struct dwc3),
98         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
99 };
100
101 static int dwc3_generic_bind(struct udevice *parent)
102 {
103         const void *fdt = gd->fdt_blob;
104         int node;
105         int ret;
106
107         for (node = fdt_first_subnode(fdt, dev_of_offset(parent)); node > 0;
108              node = fdt_next_subnode(fdt, node)) {
109                 const char *name = fdt_get_name(fdt, node, NULL);
110                 enum usb_dr_mode dr_mode;
111                 struct udevice *dev;
112                 const char *driver;
113
114                 debug("%s: subnode name: %s\n", __func__, name);
115                 if (strncmp(name, "dwc3@", 4))
116                         continue;
117
118                 dr_mode = usb_get_dr_mode(node);
119
120                 switch (dr_mode) {
121                 case USB_DR_MODE_PERIPHERAL:
122                 case USB_DR_MODE_OTG:
123                         debug("%s: dr_mode: OTG or Peripheral\n", __func__);
124                         driver = "dwc3-generic-peripheral";
125                         break;
126                 case USB_DR_MODE_HOST:
127                         debug("%s: dr_mode: HOST\n", __func__);
128                         driver = "dwc3-generic-host";
129                         break;
130                 default:
131                         debug("%s: unsupported dr_mode\n", __func__);
132                         return -ENODEV;
133                 };
134
135                 ret = device_bind_driver_to_node(parent, driver, name,
136                                                  offset_to_ofnode(node), &dev);
137                 if (ret) {
138                         debug("%s: not able to bind usb device mode\n",
139                               __func__);
140                         return ret;
141                 }
142         }
143
144         return 0;
145 }
146
147 static const struct udevice_id dwc3_generic_ids[] = {
148         { .compatible = "xlnx,zynqmp-dwc3" },
149         { }
150 };
151
152 U_BOOT_DRIVER(dwc3_generic_wrapper) = {
153         .name   = "dwc3-generic-wrapper",
154         .id     = UCLASS_MISC,
155         .of_match = dwc3_generic_ids,
156         .bind = dwc3_generic_bind,
157 };