--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2008 Cavium Networks
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/usb.h>
+
+#include <linux/time.h>
+#include <linux/delay.h>
+
+#include <asm/octeon/cvmx.h>
+#include "cvmx-usb.h"
+#include <asm/octeon/cvmx-iob-defs.h>
+
+#include <linux/usb/hcd.h>
+
+#include <linux/err.h>
+
+struct octeon_hcd {
+ spinlock_t lock;
+ cvmx_usb_state_t usb;
+ struct tasklet_struct dequeue_tasklet;
+ struct list_head dequeue_list;
+};
+
+/* convert between an HCD pointer and the corresponding struct octeon_hcd */
+static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd)
+{
+ return (struct octeon_hcd *)(hcd->hcd_priv);
+}
+
+static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p)
+{
+ return container_of((void *)p, struct usb_hcd, hcd_priv);
+}
+
+static inline struct octeon_hcd *cvmx_usb_to_octeon(cvmx_usb_state_t *p)
+{
+ return container_of(p, struct octeon_hcd, usb);
+}
+
+static irqreturn_t octeon_usb_irq(struct usb_hcd *hcd)
+{
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_poll(&priv->usb);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return IRQ_HANDLED;
+}
+
+static void octeon_usb_port_callback(cvmx_usb_state_t *usb,
+ cvmx_usb_callback_t reason,
+ cvmx_usb_complete_t status,
+ int pipe_handle,
+ int submit_handle,
+ int bytes_transferred,
+ void *user_data)
+{
+ struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
+
+ spin_unlock(&priv->lock);
+ usb_hcd_poll_rh_status(octeon_to_hcd(priv));
+ spin_lock(&priv->lock);
+}
+
+static int octeon_usb_start(struct usb_hcd *hcd)
+{
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ unsigned long flags;
+
+ hcd->state = HC_STATE_RUNNING;
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_register_callback(&priv->usb, CVMX_USB_CALLBACK_PORT_CHANGED,
+ octeon_usb_port_callback, NULL);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return 0;
+}
+
+static void octeon_usb_stop(struct usb_hcd *hcd)
+{
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_register_callback(&priv->usb, CVMX_USB_CALLBACK_PORT_CHANGED,
+ NULL, NULL);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ hcd->state = HC_STATE_HALT;
+}
+
+static int octeon_usb_get_frame_number(struct usb_hcd *hcd)
+{
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+
+ return cvmx_usb_get_frame_number(&priv->usb);
+}
+
+static void octeon_usb_urb_complete_callback(cvmx_usb_state_t *usb,
+ cvmx_usb_callback_t reason,
+ cvmx_usb_complete_t status,
+ int pipe_handle,
+ int submit_handle,
+ int bytes_transferred,
+ void *user_data)
+{
+ struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
+ struct usb_hcd *hcd = octeon_to_hcd(priv);
+ struct device *dev = hcd->self.controller;
+ struct urb *urb = user_data;
+
+ urb->actual_length = bytes_transferred;
+ urb->hcpriv = NULL;
+
+ if (!list_empty(&urb->urb_list)) {
+ /*
+ * It is on the dequeue_list, but we are going to call
+ * usb_hcd_giveback_urb(), so we must clear it from
+ * the list. We got to it before the
+ * octeon_usb_urb_dequeue_work() tasklet did.
+ */
+ list_del(&urb->urb_list);
+ /* No longer on the dequeue_list. */
+ INIT_LIST_HEAD(&urb->urb_list);
+ }
+
+ /* For Isochronous transactions we need to update the URB packet status
+ list from data in our private copy */
+ if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+ int i;
+ /*
+ * The pointer to the private list is stored in the setup_packet
+ * field.
+ */
+ cvmx_usb_iso_packet_t *iso_packet = (cvmx_usb_iso_packet_t *) urb->setup_packet;
+ /* Recalculate the transfer size by adding up each packet */
+ urb->actual_length = 0;
+ for (i = 0; i < urb->number_of_packets; i++) {
+ if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) {
+ urb->iso_frame_desc[i].status = 0;
+ urb->iso_frame_desc[i].actual_length = iso_packet[i].length;
+ urb->actual_length += urb->iso_frame_desc[i].actual_length;
+ } else {
+ dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n",
+ i, urb->number_of_packets,
+ iso_packet[i].status, pipe_handle,
+ submit_handle, iso_packet[i].length);
+ urb->iso_frame_desc[i].status = -EREMOTEIO;
+ }
+ }
+ /* Free the private list now that we don't need it anymore */
+ kfree(iso_packet);
+ urb->setup_packet = NULL;
+ }
+
+ switch (status) {
+ case CVMX_USB_COMPLETE_SUCCESS:
+ urb->status = 0;
+ break;
+ case CVMX_USB_COMPLETE_CANCEL:
+ if (urb->status == 0)
+ urb->status = -ENOENT;
+ break;
+ case CVMX_USB_COMPLETE_STALL:
+ dev_dbg(dev, "status=stall pipe=%d submit=%d size=%d\n",
+ pipe_handle, submit_handle, bytes_transferred);
+ urb->status = -EPIPE;
+ break;
+ case CVMX_USB_COMPLETE_BABBLEERR:
+ dev_dbg(dev, "status=babble pipe=%d submit=%d size=%d\n",
+ pipe_handle, submit_handle, bytes_transferred);
+ urb->status = -EPIPE;
+ break;
+ case CVMX_USB_COMPLETE_SHORT:
+ dev_dbg(dev, "status=short pipe=%d submit=%d size=%d\n",
+ pipe_handle, submit_handle, bytes_transferred);
+ urb->status = -EREMOTEIO;
+ break;
+ case CVMX_USB_COMPLETE_ERROR:
+ case CVMX_USB_COMPLETE_XACTERR:
+ case CVMX_USB_COMPLETE_DATATGLERR:
+ case CVMX_USB_COMPLETE_FRAMEERR:
+ dev_dbg(dev, "status=%d pipe=%d submit=%d size=%d\n",
+ status, pipe_handle, submit_handle, bytes_transferred);
+ urb->status = -EPROTO;
+ break;
+ }
+ spin_unlock(&priv->lock);
+ usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status);
+ spin_lock(&priv->lock);
+}
+
+static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
+ struct urb *urb,
+ gfp_t mem_flags)
+{
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ struct device *dev = hcd->self.controller;
+ int submit_handle = -1;
+ int pipe_handle;
+ unsigned long flags;
+ cvmx_usb_iso_packet_t *iso_packet;
+ struct usb_host_endpoint *ep = urb->ep;
+
+ urb->status = 0;
+ INIT_LIST_HEAD(&urb->urb_list); /* not enqueued on dequeue_list */
+ spin_lock_irqsave(&priv->lock, flags);
+
+ if (!ep->hcpriv) {
+ cvmx_usb_transfer_t transfer_type;
+ cvmx_usb_speed_t speed;
+ int split_device = 0;
+ int split_port = 0;
+ switch (usb_pipetype(urb->pipe)) {
+ case PIPE_ISOCHRONOUS:
+ transfer_type = CVMX_USB_TRANSFER_ISOCHRONOUS;
+ break;
+ case PIPE_INTERRUPT:
+ transfer_type = CVMX_USB_TRANSFER_INTERRUPT;
+ break;
+ case PIPE_CONTROL:
+ transfer_type = CVMX_USB_TRANSFER_CONTROL;
+ break;
+ default:
+ transfer_type = CVMX_USB_TRANSFER_BULK;
+ break;
+ }
+ switch (urb->dev->speed) {
+ case USB_SPEED_LOW:
+ speed = CVMX_USB_SPEED_LOW;
+ break;
+ case USB_SPEED_FULL:
+ speed = CVMX_USB_SPEED_FULL;
+ break;
+ default:
+ speed = CVMX_USB_SPEED_HIGH;
+ break;
+ }
+ /*
+ * For slow devices on high speed ports we need to find the hub
+ * that does the speed translation so we know where to send the
+ * split transactions.
+ */
+ if (speed != CVMX_USB_SPEED_HIGH) {
+ /*
+ * Start at this device and work our way up the usb
+ * tree.
+ */
+ struct usb_device *dev = urb->dev;
+ while (dev->parent) {
+ /*
+ * If our parent is high speed then he'll
+ * receive the splits.
+ */
+ if (dev->parent->speed == USB_SPEED_HIGH) {
+ split_device = dev->parent->devnum;
+ split_port = dev->portnum;
+ break;
+ }
+ /*
+ * Move up the tree one level. If we make it all
+ * the way up the tree, then the port must not
+ * be in high speed mode and we don't need a
+ * split.
+ */
+ dev = dev->parent;
+ }
+ }
+ pipe_handle = cvmx_usb_open_pipe(&priv->usb,
+ 0,
+ usb_pipedevice(urb->pipe),
+ usb_pipeendpoint(urb->pipe),
+ speed,
+ le16_to_cpu(ep->desc.wMaxPacketSize) & 0x7ff,
+ transfer_type,
+ usb_pipein(urb->pipe) ? CVMX_USB_DIRECTION_IN : CVMX_USB_DIRECTION_OUT,
+ urb->interval,
+ (le16_to_cpu(ep->desc.wMaxPacketSize) >> 11) & 0x3,
+ split_device,
+ split_port);
+ if (pipe_handle < 0) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ dev_dbg(dev, "Failed to create pipe\n");
+ return -ENOMEM;
+ }
+ ep->hcpriv = (void *)(0x10000L + pipe_handle);
+ } else {
+ pipe_handle = 0xffff & (long)ep->hcpriv;
+ }
+
+ switch (usb_pipetype(urb->pipe)) {
+ case PIPE_ISOCHRONOUS:
+ dev_dbg(dev, "Submit isochronous to %d.%d\n",
+ usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
+ /*
+ * Allocate a structure to use for our private list of
+ * isochronous packets.
+ */
+ iso_packet = kmalloc(urb->number_of_packets * sizeof(cvmx_usb_iso_packet_t), GFP_ATOMIC);
+ if (iso_packet) {
+ int i;
+ /* Fill the list with the data from the URB */
+ for (i = 0; i < urb->number_of_packets; i++) {
+ iso_packet[i].offset = urb->iso_frame_desc[i].offset;
+ iso_packet[i].length = urb->iso_frame_desc[i].length;
+ iso_packet[i].status = CVMX_USB_COMPLETE_ERROR;
+ }
+ /*
+ * Store a pointer to the list in the URB setup_packet
+ * field. We know this currently isn't being used and
+ * this saves us a bunch of logic.
+ */
+ urb->setup_packet = (char *)iso_packet;
+ submit_handle = cvmx_usb_submit_isochronous(&priv->usb, pipe_handle,
+ urb->start_frame,
+ 0 /* flags */ ,
+ urb->number_of_packets,
+ iso_packet,
+ urb->transfer_dma,
+ urb->transfer_buffer_length,
+ octeon_usb_urb_complete_callback,
+ urb);
+ /*
+ * If submit failed we need to free our private packet
+ * list.
+ */
+ if (submit_handle < 0) {
+ urb->setup_packet = NULL;
+ kfree(iso_packet);
+ }
+ }
+ break;
+ case PIPE_INTERRUPT:
+ dev_dbg(dev, "Submit interrupt to %d.%d\n",
+ usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
+ submit_handle = cvmx_usb_submit_interrupt(&priv->usb, pipe_handle,
+ urb->transfer_dma,
+ urb->transfer_buffer_length,
+ octeon_usb_urb_complete_callback,
+ urb);
+ break;
+ case PIPE_CONTROL:
+ dev_dbg(dev, "Submit control to %d.%d\n",
+ usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
+ submit_handle = cvmx_usb_submit_control(&priv->usb, pipe_handle,
+ urb->setup_dma,
+ urb->transfer_dma,
+ urb->transfer_buffer_length,
+ octeon_usb_urb_complete_callback,
+ urb);
+ break;
+ case PIPE_BULK:
+ dev_dbg(dev, "Submit bulk to %d.%d\n",
+ usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
+ submit_handle = cvmx_usb_submit_bulk(&priv->usb, pipe_handle,
+ urb->transfer_dma,
+ urb->transfer_buffer_length,
+ octeon_usb_urb_complete_callback,
+ urb);
+ break;
+ }
+ if (submit_handle < 0) {
+ spin_unlock_irqrestore(&priv->lock, flags);
+ dev_dbg(dev, "Failed to submit\n");
+ return -ENOMEM;
+ }
+ urb->hcpriv = (void *)(long)(((submit_handle & 0xffff) << 16) | pipe_handle);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return 0;
+}
+
+static void octeon_usb_urb_dequeue_work(unsigned long arg)
+{
+ unsigned long flags;
+ struct octeon_hcd *priv = (struct octeon_hcd *)arg;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ while (!list_empty(&priv->dequeue_list)) {
+ int pipe_handle;
+ int submit_handle;
+ struct urb *urb = container_of(priv->dequeue_list.next, struct urb, urb_list);
+ list_del(&urb->urb_list);
+ /* not enqueued on dequeue_list */
+ INIT_LIST_HEAD(&urb->urb_list);
+ pipe_handle = 0xffff & (long)urb->hcpriv;
+ submit_handle = ((long)urb->hcpriv) >> 16;
+ cvmx_usb_cancel(&priv->usb, pipe_handle, submit_handle);
+ }
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+static int octeon_usb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
+{
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ unsigned long flags;
+
+ if (!urb->dev)
+ return -EINVAL;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ urb->status = status;
+ list_add_tail(&urb->urb_list, &priv->dequeue_list);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ tasklet_schedule(&priv->dequeue_tasklet);
+
+ return 0;
+}
+
+static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
+{
+ struct device *dev = hcd->self.controller;
+
+ if (ep->hcpriv) {
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ int pipe_handle = 0xffff & (long)ep->hcpriv;
+ unsigned long flags;
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_cancel_all(&priv->usb, pipe_handle);
+ if (cvmx_usb_close_pipe(&priv->usb, pipe_handle))
+ dev_dbg(dev, "Closing pipe %d failed\n", pipe_handle);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ ep->hcpriv = NULL;
+ }
+}
+
+static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ cvmx_usb_port_status_t port_status;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+ port_status = cvmx_usb_get_status(&priv->usb);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ buf[0] = 0;
+ buf[0] = port_status.connect_change << 1;
+
+ return (buf[0] != 0);
+}
+
+static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength)
+{
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ struct device *dev = hcd->self.controller;
+ cvmx_usb_port_status_t usb_port_status;
+ int port_status;
+ struct usb_hub_descriptor *desc;
+ unsigned long flags;
+
+ switch (typeReq) {
+ case ClearHubFeature:
+ dev_dbg(dev, "ClearHubFeature\n");
+ switch (wValue) {
+ case C_HUB_LOCAL_POWER:
+ case C_HUB_OVER_CURRENT:
+ /* Nothing required here */
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case ClearPortFeature:
+ dev_dbg(dev, "ClearPortFeature\n");
+ if (wIndex != 1) {
+ dev_dbg(dev, " INVALID\n");
+ return -EINVAL;
+ }
+
+ switch (wValue) {
+ case USB_PORT_FEAT_ENABLE:
+ dev_dbg(dev, " ENABLE\n");
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_disable(&priv->usb);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ break;
+ case USB_PORT_FEAT_SUSPEND:
+ dev_dbg(dev, " SUSPEND\n");
+ /* Not supported on Octeon */
+ break;
+ case USB_PORT_FEAT_POWER:
+ dev_dbg(dev, " POWER\n");
+ /* Not supported on Octeon */
+ break;
+ case USB_PORT_FEAT_INDICATOR:
+ dev_dbg(dev, " INDICATOR\n");
+ /* Port inidicator not supported */
+ break;
+ case USB_PORT_FEAT_C_CONNECTION:
+ dev_dbg(dev, " C_CONNECTION\n");
+ /* Clears drivers internal connect status change flag */
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb));
+ spin_unlock_irqrestore(&priv->lock, flags);
+ break;
+ case USB_PORT_FEAT_C_RESET:
+ dev_dbg(dev, " C_RESET\n");
+ /*
+ * Clears the driver's internal Port Reset Change flag.
+ */
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb));
+ spin_unlock_irqrestore(&priv->lock, flags);
+ break;
+ case USB_PORT_FEAT_C_ENABLE:
+ dev_dbg(dev, " C_ENABLE\n");
+ /*
+ * Clears the driver's internal Port Enable/Disable
+ * Change flag.
+ */
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb));
+ spin_unlock_irqrestore(&priv->lock, flags);
+ break;
+ case USB_PORT_FEAT_C_SUSPEND:
+ dev_dbg(dev, " C_SUSPEND\n");
+ /*
+ * Clears the driver's internal Port Suspend Change
+ * flag, which is set when resume signaling on the host
+ * port is complete.
+ */
+ break;
+ case USB_PORT_FEAT_C_OVER_CURRENT:
+ dev_dbg(dev, " C_OVER_CURRENT\n");
+ /* Clears the driver's overcurrent Change flag */
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb));
+ spin_unlock_irqrestore(&priv->lock, flags);
+ break;
+ default:
+ dev_dbg(dev, " UNKNOWN\n");
+ return -EINVAL;
+ }
+ break;
+ case GetHubDescriptor:
+ dev_dbg(dev, "GetHubDescriptor\n");
+ desc = (struct usb_hub_descriptor *)buf;
+ desc->bDescLength = 9;
+ desc->bDescriptorType = 0x29;
+ desc->bNbrPorts = 1;
+ desc->wHubCharacteristics = 0x08;
+ desc->bPwrOn2PwrGood = 1;
+ desc->bHubContrCurrent = 0;
+ desc->u.hs.DeviceRemovable[0] = 0;
+ desc->u.hs.DeviceRemovable[1] = 0xff;
+ break;
+ case GetHubStatus:
+ dev_dbg(dev, "GetHubStatus\n");
+ *(__le32 *) buf = 0;
+ break;
+ case GetPortStatus:
+ dev_dbg(dev, "GetPortStatus\n");
+ if (wIndex != 1) {
+ dev_dbg(dev, " INVALID\n");
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&priv->lock, flags);
+ usb_port_status = cvmx_usb_get_status(&priv->usb);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ port_status = 0;
+
+ if (usb_port_status.connect_change) {
+ port_status |= (1 << USB_PORT_FEAT_C_CONNECTION);
+ dev_dbg(dev, " C_CONNECTION\n");
+ }
+
+ if (usb_port_status.port_enabled) {
+ port_status |= (1 << USB_PORT_FEAT_C_ENABLE);
+ dev_dbg(dev, " C_ENABLE\n");
+ }
+
+ if (usb_port_status.connected) {
+ port_status |= (1 << USB_PORT_FEAT_CONNECTION);
+ dev_dbg(dev, " CONNECTION\n");
+ }
+
+ if (usb_port_status.port_enabled) {
+ port_status |= (1 << USB_PORT_FEAT_ENABLE);
+ dev_dbg(dev, " ENABLE\n");
+ }
+
+ if (usb_port_status.port_over_current) {
+ port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT);
+ dev_dbg(dev, " OVER_CURRENT\n");
+ }
+
+ if (usb_port_status.port_powered) {
+ port_status |= (1 << USB_PORT_FEAT_POWER);
+ dev_dbg(dev, " POWER\n");
+ }
+
+ if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH) {
+ port_status |= USB_PORT_STAT_HIGH_SPEED;
+ dev_dbg(dev, " HIGHSPEED\n");
+ } else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW) {
+ port_status |= (1 << USB_PORT_FEAT_LOWSPEED);
+ dev_dbg(dev, " LOWSPEED\n");
+ }
+
+ *((__le32 *) buf) = cpu_to_le32(port_status);
+ break;
+ case SetHubFeature:
+ dev_dbg(dev, "SetHubFeature\n");
+ /* No HUB features supported */
+ break;
+ case SetPortFeature:
+ dev_dbg(dev, "SetPortFeature\n");
+ if (wIndex != 1) {
+ dev_dbg(dev, " INVALID\n");
+ return -EINVAL;
+ }
+
+ switch (wValue) {
+ case USB_PORT_FEAT_SUSPEND:
+ dev_dbg(dev, " SUSPEND\n");
+ return -EINVAL;
+ case USB_PORT_FEAT_POWER:
+ dev_dbg(dev, " POWER\n");
+ return -EINVAL;
+ case USB_PORT_FEAT_RESET:
+ dev_dbg(dev, " RESET\n");
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_disable(&priv->usb);
+ if (cvmx_usb_enable(&priv->usb))
+ dev_dbg(dev, "Failed to enable the port\n");
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return 0;
+ case USB_PORT_FEAT_INDICATOR:
+ dev_dbg(dev, " INDICATOR\n");
+ /* Not supported */
+ break;
+ default:
+ dev_dbg(dev, " UNKNOWN\n");
+ return -EINVAL;
+ }
+ break;
+ default:
+ dev_dbg(dev, "Unknown root hub request\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+
+static const struct hc_driver octeon_hc_driver = {
+ .description = "Octeon USB",
+ .product_desc = "Octeon Host Controller",
+ .hcd_priv_size = sizeof(struct octeon_hcd),
+ .irq = octeon_usb_irq,
+ .flags = HCD_MEMORY | HCD_USB2,
+ .start = octeon_usb_start,
+ .stop = octeon_usb_stop,
+ .urb_enqueue = octeon_usb_urb_enqueue,
+ .urb_dequeue = octeon_usb_urb_dequeue,
+ .endpoint_disable = octeon_usb_endpoint_disable,
+ .get_frame_number = octeon_usb_get_frame_number,
+ .hub_status_data = octeon_usb_hub_status_data,
+ .hub_control = octeon_usb_hub_control,
+};
+
+
+static int octeon_usb_driver_probe(struct device *dev)
+{
+ int status;
+ int usb_num = to_platform_device(dev)->id;
+ int irq = platform_get_irq(to_platform_device(dev), 0);
+ struct octeon_hcd *priv;
+ struct usb_hcd *hcd;
+ unsigned long flags;
+
+ /*
+ * Set the DMA mask to 64bits so we get buffers already translated for
+ * DMA.
+ */
+ dev->coherent_dma_mask = ~0;
+ dev->dma_mask = &dev->coherent_dma_mask;
+
+ hcd = usb_create_hcd(&octeon_hc_driver, dev, dev_name(dev));
+ if (!hcd) {
+ dev_dbg(dev, "Failed to allocate memory for HCD\n");
+ return -1;
+ }
+ hcd->uses_new_polling = 1;
+ priv = (struct octeon_hcd *)hcd->hcd_priv;
+
+ spin_lock_init(&priv->lock);
+
+ tasklet_init(&priv->dequeue_tasklet, octeon_usb_urb_dequeue_work, (unsigned long)priv);
+ INIT_LIST_HEAD(&priv->dequeue_list);
+
+ status = cvmx_usb_initialize(&priv->usb, usb_num, CVMX_USB_INITIALIZE_FLAGS_CLOCK_AUTO);
+ if (status) {
+ dev_dbg(dev, "USB initialization failed with %d\n", status);
+ kfree(hcd);
+ return -1;
+ }
+
+ /* This delay is needed for CN3010, but I don't know why... */
+ mdelay(10);
+
+ spin_lock_irqsave(&priv->lock, flags);
+ cvmx_usb_poll(&priv->usb);
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ status = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (status) {
+ dev_dbg(dev, "USB add HCD failed with %d\n", status);
+ kfree(hcd);
+ return -1;
+ }
+
+ dev_dbg(dev, "Registered HCD for port %d on irq %d\n", usb_num, irq);
+
+ return 0;
+}
+
+static int octeon_usb_driver_remove(struct device *dev)
+{
+ int status;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct octeon_hcd *priv = hcd_to_octeon(hcd);
+ unsigned long flags;
+
+ usb_remove_hcd(hcd);
+ tasklet_kill(&priv->dequeue_tasklet);
+ spin_lock_irqsave(&priv->lock, flags);
+ status = cvmx_usb_shutdown(&priv->usb);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ if (status)
+ dev_dbg(dev, "USB shutdown failed with %d\n", status);
+
+ kfree(hcd);
+
+ return 0;
+}
+
+static struct device_driver octeon_usb_driver = {
+ .name = "OcteonUSB",
+ .bus = &platform_bus_type,
+ .probe = octeon_usb_driver_probe,
+ .remove = octeon_usb_driver_remove,
+};
+
+
+#define MAX_USB_PORTS 10
+static struct platform_device *pdev_glob[MAX_USB_PORTS];
+static int octeon_usb_registered;
+static int __init octeon_usb_module_init(void)
+{
+ int num_devices = cvmx_usb_get_num_ports();
+ int device;
+
+ if (usb_disabled() || num_devices == 0)
+ return -ENODEV;
+
+ if (driver_register(&octeon_usb_driver))
+ return -ENOMEM;
+
+ octeon_usb_registered = 1;
+
+ /*
+ * Only cn52XX and cn56XX have DWC_OTG USB hardware and the
+ * IOB priority registers. Under heavy network load USB
+ * hardware can be starved by the IOB causing a crash. Give
+ * it a priority boost if it has been waiting more than 400
+ * cycles to avoid this situation.
+ *
+ * Testing indicates that a cnt_val of 8192 is not sufficient,
+ * but no failures are seen with 4096. We choose a value of
+ * 400 to give a safety factor of 10.
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) {
+ union cvmx_iob_n2c_l2c_pri_cnt pri_cnt;
+
+ pri_cnt.u64 = 0;
+ pri_cnt.s.cnt_enb = 1;
+ pri_cnt.s.cnt_val = 400;
+ cvmx_write_csr(CVMX_IOB_N2C_L2C_PRI_CNT, pri_cnt.u64);
+ }
+
+ for (device = 0; device < num_devices; device++) {
+ struct resource irq_resource;
+ struct platform_device *pdev;
+ memset(&irq_resource, 0, sizeof(irq_resource));
+ irq_resource.start = (device == 0) ? OCTEON_IRQ_USB0 : OCTEON_IRQ_USB1;
+ irq_resource.end = irq_resource.start;
+ irq_resource.flags = IORESOURCE_IRQ;
+ pdev = platform_device_register_simple((char *)octeon_usb_driver. name, device, &irq_resource, 1);
+ if (IS_ERR(pdev)) {
+ driver_unregister(&octeon_usb_driver);
+ octeon_usb_registered = 0;
+ return PTR_ERR(pdev);
+ }
+ if (device < MAX_USB_PORTS)
+ pdev_glob[device] = pdev;
+
+ }
+ return 0;
+}
+
+static void __exit octeon_usb_module_cleanup(void)
+{
+ int i;
+
+ for (i = 0; i < MAX_USB_PORTS; i++)
+ if (pdev_glob[i]) {
+ platform_device_unregister(pdev_glob[i]);
+ pdev_glob[i] = NULL;
+ }
+ if (octeon_usb_registered)
+ driver_unregister(&octeon_usb_driver);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
+MODULE_DESCRIPTION("Cavium Networks Octeon USB Host driver.");
+module_init(octeon_usb_module_init);
+module_exit(octeon_usb_module_cleanup);
projects / openwrt / openwrt.git / blobdiff