Rui Miguel Silva | b2d2b78 | 2022-06-29 11:06:14 +0100 | [diff] [blame] | 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 <rui.silva@linaro.org> |
| 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 | } |