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path: root/drivers/staging/wusbcore/rh.c
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Diffstat (limited to 'drivers/staging/wusbcore/rh.c')
-rw-r--r--drivers/staging/wusbcore/rh.c426
1 files changed, 0 insertions, 426 deletions
diff --git a/drivers/staging/wusbcore/rh.c b/drivers/staging/wusbcore/rh.c
deleted file mode 100644
index 20c08cd9dcbf..000000000000
--- a/drivers/staging/wusbcore/rh.c
+++ /dev/null
@@ -1,426 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Wireless USB Host Controller
- * Root Hub operations
- *
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- *
- * We fake a root hub that has fake ports (as many as simultaneous
- * devices the Wireless USB Host Controller can deal with). For each
- * port we keep an state in @wusbhc->port[index] identical to the one
- * specified in the USB2.0[ch11] spec and some extra device
- * information that complements the one in 'struct usb_device' (as
- * this lacs a hcpriv pointer).
- *
- * Note this is common to WHCI and HWA host controllers.
- *
- * Through here we enable most of the state changes that the USB stack
- * will use to connect or disconnect devices. We need to do some
- * forced adaptation of Wireless USB device states vs. wired:
- *
- * USB: WUSB:
- *
- * Port Powered-off port slot n/a
- * Powered-on port slot available
- * Disconnected port slot available
- * Connected port slot assigned device
- * device sent DN_Connect
- * device was authenticated
- * Enabled device is authenticated, transitioned
- * from unauth -> auth -> default address
- * -> enabled
- * Reset disconnect
- * Disable disconnect
- *
- * This maps the standard USB port states with the WUSB device states
- * so we can fake ports without having to modify the USB stack.
- *
- * FIXME: this process will change in the future
- *
- *
- * ENTRY POINTS
- *
- * Our entry points into here are, as in hcd.c, the USB stack root hub
- * ops defined in the usb_hcd struct:
- *
- * wusbhc_rh_status_data() Provide hub and port status data bitmap
- *
- * wusbhc_rh_control() Execution of all the major requests
- * you can do to a hub (Set|Clear
- * features, get descriptors, status, etc).
- *
- * wusbhc_rh_[suspend|resume]() That
- *
- * wusbhc_rh_start_port_reset() ??? unimplemented
- */
-#include <linux/slab.h>
-#include <linux/export.h>
-#include "wusbhc.h"
-
-/*
- * Reset a fake port
- *
- * Using a Reset Device IE is too heavyweight as it causes the device
- * to enter the UnConnected state and leave the cluster, this can mean
- * that when the device reconnects it is connected to a different fake
- * port.
- *
- * Instead, reset authenticated devices with a SetAddress(0), followed
- * by a SetAddresss(AuthAddr).
- *
- * For unauthenticated devices just pretend to reset but do nothing.
- * If the device initialization continues to fail it will eventually
- * time out after TrustTimeout and enter the UnConnected state.
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- *
- * Supposedly we are the only thread accesing @wusbhc->port; in any
- * case, maybe we should move the mutex locking from
- * wusbhc_devconnect_auth() to here.
- *
- * @port_idx refers to the wusbhc's port index, not the USB port number
- */
-static int wusbhc_rh_port_reset(struct wusbhc *wusbhc, u8 port_idx)
-{
- int result = 0;
- struct wusb_port *port = wusb_port_by_idx(wusbhc, port_idx);
- struct wusb_dev *wusb_dev = port->wusb_dev;
-
- if (wusb_dev == NULL)
- return -ENOTCONN;
-
- port->status |= USB_PORT_STAT_RESET;
- port->change |= USB_PORT_STAT_C_RESET;
-
- if (wusb_dev->addr & WUSB_DEV_ADDR_UNAUTH)
- result = 0;
- else
- result = wusb_dev_update_address(wusbhc, wusb_dev);
-
- port->status &= ~USB_PORT_STAT_RESET;
- port->status |= USB_PORT_STAT_ENABLE;
- port->change |= USB_PORT_STAT_C_RESET | USB_PORT_STAT_C_ENABLE;
-
- return result;
-}
-
-/*
- * Return the hub change status bitmap
- *
- * The bits in the change status bitmap are cleared when a
- * ClearPortFeature request is issued (USB2.0[11.12.3,11.12.4].
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- *
- * WARNING!! This gets called from atomic context; we cannot get the
- * mutex--the only race condition we can find is some bit
- * changing just after we copy it, which shouldn't be too
- * big of a problem [and we can't make it an spinlock
- * because other parts need to take it and sleep] .
- *
- * @usb_hcd is refcounted, so it won't disappear under us
- * and before killing a host, the polling of the root hub
- * would be stopped anyway.
- */
-int wusbhc_rh_status_data(struct usb_hcd *usb_hcd, char *_buf)
-{
- struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
- size_t cnt, size, bits_set = 0;
-
- /* WE DON'T LOCK, see comment */
- /* round up to bytes. Hub bit is bit 0 so add 1. */
- size = DIV_ROUND_UP(wusbhc->ports_max + 1, 8);
-
- /* clear the output buffer. */
- memset(_buf, 0, size);
- /* set the bit for each changed port. */
- for (cnt = 0; cnt < wusbhc->ports_max; cnt++) {
-
- if (wusb_port_by_idx(wusbhc, cnt)->change) {
- const int bitpos = cnt+1;
-
- _buf[bitpos/8] |= (1 << (bitpos % 8));
- bits_set++;
- }
- }
-
- return bits_set ? size : 0;
-}
-EXPORT_SYMBOL_GPL(wusbhc_rh_status_data);
-
-/*
- * Return the hub's descriptor
- *
- * NOTE: almost cut and paste from ehci-hub.c
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked
- */
-static int wusbhc_rh_get_hub_descr(struct wusbhc *wusbhc, u16 wValue,
- u16 wIndex,
- struct usb_hub_descriptor *descr,
- u16 wLength)
-{
- u16 temp = 1 + (wusbhc->ports_max / 8);
- u8 length = 7 + 2 * temp;
-
- if (wLength < length)
- return -ENOSPC;
- descr->bDescLength = 7 + 2 * temp;
- descr->bDescriptorType = USB_DT_HUB; /* HUB type */
- descr->bNbrPorts = wusbhc->ports_max;
- descr->wHubCharacteristics = cpu_to_le16(
- HUB_CHAR_COMMON_LPSM /* All ports power at once */
- | 0x00 /* not part of compound device */
- | HUB_CHAR_NO_OCPM /* No overcurrent protection */
- | 0x00 /* 8 FS think time FIXME ?? */
- | 0x00); /* No port indicators */
- descr->bPwrOn2PwrGood = 0;
- descr->bHubContrCurrent = 0;
- /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
- memset(&descr->u.hs.DeviceRemovable[0], 0, temp);
- memset(&descr->u.hs.DeviceRemovable[temp], 0xff, temp);
- return 0;
-}
-
-/*
- * Clear a hub feature
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- *
- * Nothing to do, so no locking needed ;)
- */
-static int wusbhc_rh_clear_hub_feat(struct wusbhc *wusbhc, u16 feature)
-{
- int result;
-
- switch (feature) {
- case C_HUB_LOCAL_POWER:
- /* FIXME: maybe plug bit 0 to the power input status,
- * if any?
- * see wusbhc_rh_get_hub_status() */
- case C_HUB_OVER_CURRENT:
- result = 0;
- break;
- default:
- result = -EPIPE;
- }
- return result;
-}
-
-/*
- * Return hub status (it is always zero...)
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- *
- * Nothing to do, so no locking needed ;)
- */
-static int wusbhc_rh_get_hub_status(struct wusbhc *wusbhc, u32 *buf,
- u16 wLength)
-{
- /* FIXME: maybe plug bit 0 to the power input status (if any)? */
- *buf = 0;
- return 0;
-}
-
-/*
- * Set a port feature
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- */
-static int wusbhc_rh_set_port_feat(struct wusbhc *wusbhc, u16 feature,
- u8 selector, u8 port_idx)
-{
- struct device *dev = wusbhc->dev;
-
- if (port_idx > wusbhc->ports_max)
- return -EINVAL;
-
- switch (feature) {
- /* According to USB2.0[11.24.2.13]p2, these features
- * are not required to be implemented. */
- case USB_PORT_FEAT_C_OVER_CURRENT:
- case USB_PORT_FEAT_C_ENABLE:
- case USB_PORT_FEAT_C_SUSPEND:
- case USB_PORT_FEAT_C_CONNECTION:
- case USB_PORT_FEAT_C_RESET:
- return 0;
- case USB_PORT_FEAT_POWER:
- /* No such thing, but we fake it works */
- mutex_lock(&wusbhc->mutex);
- wusb_port_by_idx(wusbhc, port_idx)->status |= USB_PORT_STAT_POWER;
- mutex_unlock(&wusbhc->mutex);
- return 0;
- case USB_PORT_FEAT_RESET:
- return wusbhc_rh_port_reset(wusbhc, port_idx);
- case USB_PORT_FEAT_ENABLE:
- case USB_PORT_FEAT_SUSPEND:
- dev_err(dev, "(port_idx %d) set feat %d/%d UNIMPLEMENTED\n",
- port_idx, feature, selector);
- return -ENOSYS;
- default:
- dev_err(dev, "(port_idx %d) set feat %d/%d UNKNOWN\n",
- port_idx, feature, selector);
- return -EPIPE;
- }
-
- return 0;
-}
-
-/*
- * Clear a port feature...
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- */
-static int wusbhc_rh_clear_port_feat(struct wusbhc *wusbhc, u16 feature,
- u8 selector, u8 port_idx)
-{
- int result = 0;
- struct device *dev = wusbhc->dev;
-
- if (port_idx > wusbhc->ports_max)
- return -EINVAL;
-
- mutex_lock(&wusbhc->mutex);
- switch (feature) {
- case USB_PORT_FEAT_POWER: /* fake port always on */
- /* According to USB2.0[11.24.2.7.1.4], no need to implement? */
- case USB_PORT_FEAT_C_OVER_CURRENT:
- break;
- case USB_PORT_FEAT_C_RESET:
- wusb_port_by_idx(wusbhc, port_idx)->change &= ~USB_PORT_STAT_C_RESET;
- break;
- case USB_PORT_FEAT_C_CONNECTION:
- wusb_port_by_idx(wusbhc, port_idx)->change &= ~USB_PORT_STAT_C_CONNECTION;
- break;
- case USB_PORT_FEAT_ENABLE:
- __wusbhc_dev_disable(wusbhc, port_idx);
- break;
- case USB_PORT_FEAT_C_ENABLE:
- wusb_port_by_idx(wusbhc, port_idx)->change &= ~USB_PORT_STAT_C_ENABLE;
- break;
- case USB_PORT_FEAT_SUSPEND:
- case USB_PORT_FEAT_C_SUSPEND:
- dev_err(dev, "(port_idx %d) Clear feat %d/%d UNIMPLEMENTED\n",
- port_idx, feature, selector);
- result = -ENOSYS;
- break;
- default:
- dev_err(dev, "(port_idx %d) Clear feat %d/%d UNKNOWN\n",
- port_idx, feature, selector);
- result = -EPIPE;
- break;
- }
- mutex_unlock(&wusbhc->mutex);
-
- return result;
-}
-
-/*
- * Return the port's status
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- */
-static int wusbhc_rh_get_port_status(struct wusbhc *wusbhc, u16 port_idx,
- u32 *_buf, u16 wLength)
-{
- __le16 *buf = (__le16 *)_buf;
-
- if (port_idx > wusbhc->ports_max)
- return -EINVAL;
-
- mutex_lock(&wusbhc->mutex);
- buf[0] = cpu_to_le16(wusb_port_by_idx(wusbhc, port_idx)->status);
- buf[1] = cpu_to_le16(wusb_port_by_idx(wusbhc, port_idx)->change);
- mutex_unlock(&wusbhc->mutex);
-
- return 0;
-}
-
-/*
- * Entry point for Root Hub operations
- *
- * @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
- */
-int wusbhc_rh_control(struct usb_hcd *usb_hcd, u16 reqntype, u16 wValue,
- u16 wIndex, char *buf, u16 wLength)
-{
- int result = -ENOSYS;
- struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-
- switch (reqntype) {
- case GetHubDescriptor:
- result = wusbhc_rh_get_hub_descr(
- wusbhc, wValue, wIndex,
- (struct usb_hub_descriptor *) buf, wLength);
- break;
- case ClearHubFeature:
- result = wusbhc_rh_clear_hub_feat(wusbhc, wValue);
- break;
- case GetHubStatus:
- result = wusbhc_rh_get_hub_status(wusbhc, (u32 *)buf, wLength);
- break;
-
- case SetPortFeature:
- result = wusbhc_rh_set_port_feat(wusbhc, wValue, wIndex >> 8,
- (wIndex & 0xff) - 1);
- break;
- case ClearPortFeature:
- result = wusbhc_rh_clear_port_feat(wusbhc, wValue, wIndex >> 8,
- (wIndex & 0xff) - 1);
- break;
- case GetPortStatus:
- result = wusbhc_rh_get_port_status(wusbhc, wIndex - 1,
- (u32 *)buf, wLength);
- break;
-
- case SetHubFeature:
- default:
- dev_err(wusbhc->dev, "%s (%p [%p], %x, %x, %x, %p, %x) "
- "UNIMPLEMENTED\n", __func__, usb_hcd, wusbhc, reqntype,
- wValue, wIndex, buf, wLength);
- /* dump_stack(); */
- result = -ENOSYS;
- }
- return result;
-}
-EXPORT_SYMBOL_GPL(wusbhc_rh_control);
-
-int wusbhc_rh_start_port_reset(struct usb_hcd *usb_hcd, unsigned port_idx)
-{
- struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
- dev_err(wusbhc->dev, "%s (%p [%p], port_idx %u) UNIMPLEMENTED\n",
- __func__, usb_hcd, wusbhc, port_idx);
- WARN_ON(1);
- return -ENOSYS;
-}
-EXPORT_SYMBOL_GPL(wusbhc_rh_start_port_reset);
-
-static void wusb_port_init(struct wusb_port *port)
-{
- port->status |= USB_PORT_STAT_HIGH_SPEED;
-}
-
-/*
- * Alloc fake port specific fields and status.
- */
-int wusbhc_rh_create(struct wusbhc *wusbhc)
-{
- int result = -ENOMEM;
- size_t port_size, itr;
- port_size = wusbhc->ports_max * sizeof(wusbhc->port[0]);
- wusbhc->port = kzalloc(port_size, GFP_KERNEL);
- if (wusbhc->port == NULL)
- goto error_port_alloc;
- for (itr = 0; itr < wusbhc->ports_max; itr++)
- wusb_port_init(&wusbhc->port[itr]);
- result = 0;
-error_port_alloc:
- return result;
-}
-
-void wusbhc_rh_destroy(struct wusbhc *wusbhc)
-{
- kfree(wusbhc->port);
-}
generated by cgit (git 2.34.1) at 2024-05-30 12:27:38 +0000