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| 1 | +// SPDX-License-Identifier: GPL-2.0 |
| 2 | +/* |
| 3 | + * Common code for usb urb handling, based on the musb-new code |
| 4 | + * |
| 5 | + * Copyright 2021 Linaro, Rui Miguel Silva <[email protected]> |
| 6 | + * |
| 7 | + */ |
| 8 | + |
| 9 | +#include <dm/device.h> |
| 10 | +#include <dm/device_compat.h> |
| 11 | +#include <linux/usb/usb_urb_compat.h> |
| 12 | + |
| 13 | +#include <time.h> |
| 14 | +#include <usb.h> |
| 15 | + |
| 16 | +#if CONFIG_IS_ENABLED(DM_USB) |
| 17 | +struct usb_device *usb_dev_get_parent(struct usb_device *udev) |
| 18 | +{ |
| 19 | + struct udevice *parent = udev->dev->parent; |
| 20 | + |
| 21 | + /* |
| 22 | + * When called from usb-uclass.c: usb_scan_device() udev->dev points |
| 23 | + * to the parent udevice, not the actual udevice belonging to the |
| 24 | + * udev as the device is not instantiated yet. |
| 25 | + * |
| 26 | + * If dev is an usb-bus, then we are called from usb_scan_device() for |
| 27 | + * an usb-device plugged directly into the root port, return NULL. |
| 28 | + */ |
| 29 | + if (device_get_uclass_id(udev->dev) == UCLASS_USB) |
| 30 | + return NULL; |
| 31 | + |
| 32 | + /* |
| 33 | + * If these 2 are not the same we are being called from |
| 34 | + * usb_scan_device() and udev itself is the parent. |
| 35 | + */ |
| 36 | + if (dev_get_parent_priv(udev->dev) != udev) |
| 37 | + return udev; |
| 38 | + |
| 39 | + /* We are being called normally, use the parent pointer */ |
| 40 | + if (device_get_uclass_id(parent) == UCLASS_USB_HUB) |
| 41 | + return dev_get_parent_priv(parent); |
| 42 | + |
| 43 | + return NULL; |
| 44 | +} |
| 45 | +#else |
| 46 | +struct usb_device *usb_dev_get_parent(struct usb_device *udev) |
| 47 | +{ |
| 48 | + return udev->parent; |
| 49 | +} |
| 50 | +#endif |
| 51 | + |
| 52 | +static void usb_urb_complete(struct urb *urb) |
| 53 | +{ |
| 54 | + urb->dev->status &= ~USB_ST_NOT_PROC; |
| 55 | + urb->dev->act_len = urb->actual_length; |
| 56 | + |
| 57 | + if (urb->status == -EINPROGRESS) |
| 58 | + urb->status = 0; |
| 59 | +} |
| 60 | + |
| 61 | +void usb_urb_fill(struct urb *urb, struct usb_host_endpoint *hep, |
| 62 | + struct usb_device *dev, int endpoint_type, |
| 63 | + unsigned long pipe, void *buffer, int len, |
| 64 | + struct devrequest *setup, int interval) |
| 65 | +{ |
| 66 | + int epnum = usb_pipeendpoint(pipe); |
| 67 | + int is_in = usb_pipein(pipe); |
| 68 | + u16 maxpacketsize = is_in ? dev->epmaxpacketin[epnum] : |
| 69 | + dev->epmaxpacketout[epnum]; |
| 70 | + |
| 71 | + memset(urb, 0, sizeof(struct urb)); |
| 72 | + memset(hep, 0, sizeof(struct usb_host_endpoint)); |
| 73 | + INIT_LIST_HEAD(&hep->urb_list); |
| 74 | + INIT_LIST_HEAD(&urb->urb_list); |
| 75 | + urb->ep = hep; |
| 76 | + urb->complete = usb_urb_complete; |
| 77 | + urb->status = -EINPROGRESS; |
| 78 | + urb->dev = dev; |
| 79 | + urb->pipe = pipe; |
| 80 | + urb->transfer_buffer = buffer; |
| 81 | + urb->transfer_dma = (unsigned long)buffer; |
| 82 | + urb->transfer_buffer_length = len; |
| 83 | + urb->setup_packet = (unsigned char *)setup; |
| 84 | + |
| 85 | + urb->ep->desc.wMaxPacketSize = __cpu_to_le16(maxpacketsize); |
| 86 | + urb->ep->desc.bmAttributes = endpoint_type; |
| 87 | + urb->ep->desc.bEndpointAddress = ((is_in ? USB_DIR_IN : USB_DIR_OUT) | |
| 88 | + epnum); |
| 89 | + urb->ep->desc.bInterval = interval; |
| 90 | +} |
| 91 | + |
| 92 | +int usb_urb_submit(struct usb_hcd *hcd, struct urb *urb) |
| 93 | +{ |
| 94 | + const struct usb_urb_ops *ops = hcd->urb_ops; |
| 95 | + unsigned long timeout; |
| 96 | + int ret; |
| 97 | + |
| 98 | + if (!ops) |
| 99 | + return -EINVAL; |
| 100 | + |
| 101 | + ret = ops->urb_enqueue(hcd, urb, 0); |
| 102 | + if (ret < 0) { |
| 103 | + printf("Failed to enqueue URB to controller\n"); |
| 104 | + return ret; |
| 105 | + } |
| 106 | + |
| 107 | + timeout = get_timer(0) + USB_TIMEOUT_MS(urb->pipe); |
| 108 | + do { |
| 109 | + if (ctrlc()) |
| 110 | + return -EIO; |
| 111 | + ops->isr(0, hcd); |
| 112 | + } while (urb->status == -EINPROGRESS && get_timer(0) < timeout); |
| 113 | + |
| 114 | + if (urb->status == -EINPROGRESS) |
| 115 | + ops->urb_dequeue(hcd, urb, -ETIME); |
| 116 | + |
| 117 | + return urb->status; |
| 118 | +} |
| 119 | + |
| 120 | +int usb_urb_submit_control(struct usb_hcd *hcd, struct urb *urb, |
| 121 | + struct usb_host_endpoint *hep, |
| 122 | + struct usb_device *dev, unsigned long pipe, |
| 123 | + void *buffer, int len, struct devrequest *setup, |
| 124 | + int interval, enum usb_device_speed speed) |
| 125 | +{ |
| 126 | + const struct usb_urb_ops *ops = hcd->urb_ops; |
| 127 | + |
| 128 | + usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_CONTROL, pipe, buffer, |
| 129 | + len, setup, 0); |
| 130 | + |
| 131 | + /* Fix speed for non hub-attached devices */ |
| 132 | + if (!usb_dev_get_parent(dev)) { |
| 133 | + dev->speed = speed; |
| 134 | + if (ops->hub_control) |
| 135 | + return ops->hub_control(hcd, dev, pipe, buffer, len, |
| 136 | + setup); |
| 137 | + } |
| 138 | + |
| 139 | + return usb_urb_submit(hcd, urb); |
| 140 | +} |
| 141 | + |
| 142 | +int usb_urb_submit_bulk(struct usb_hcd *hcd, struct urb *urb, |
| 143 | + struct usb_host_endpoint *hep, struct usb_device *dev, |
| 144 | + unsigned long pipe, void *buffer, int len) |
| 145 | +{ |
| 146 | + usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_BULK, pipe, buffer, len, |
| 147 | + NULL, 0); |
| 148 | + |
| 149 | + return usb_urb_submit(hcd, urb); |
| 150 | +} |
| 151 | + |
| 152 | +int usb_urb_submit_irq(struct usb_hcd *hcd, struct urb *urb, |
| 153 | + struct usb_host_endpoint *hep, struct usb_device *dev, |
| 154 | + unsigned long pipe, void *buffer, int len, int interval) |
| 155 | +{ |
| 156 | + usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_INT, pipe, buffer, len, |
| 157 | + NULL, interval); |
| 158 | + |
| 159 | + return usb_urb_submit(hcd, urb); |
| 160 | +} |
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