833 lines
23 KiB
C
833 lines
23 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2008 Cavium Networks
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/usb.h>
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#include <linux/time.h>
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#include <linux/delay.h>
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#include <asm/octeon/cvmx.h>
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#include "cvmx-usb.h"
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#include <asm/octeon/cvmx-iob-defs.h>
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#include <linux/usb/hcd.h>
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#include <linux/err.h>
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struct octeon_hcd {
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spinlock_t lock;
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cvmx_usb_state_t usb;
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struct tasklet_struct dequeue_tasklet;
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struct list_head dequeue_list;
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};
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/* convert between an HCD pointer and the corresponding struct octeon_hcd */
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static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd)
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{
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return (struct octeon_hcd *)(hcd->hcd_priv);
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}
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static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p)
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{
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return container_of((void *)p, struct usb_hcd, hcd_priv);
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}
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static inline struct octeon_hcd *cvmx_usb_to_octeon(cvmx_usb_state_t *p)
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{
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return container_of(p, struct octeon_hcd, usb);
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}
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static irqreturn_t octeon_usb_irq(struct usb_hcd *hcd)
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{
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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unsigned long flags;
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spin_lock_irqsave(&priv->lock, flags);
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cvmx_usb_poll(&priv->usb);
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spin_unlock_irqrestore(&priv->lock, flags);
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return IRQ_HANDLED;
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}
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static void octeon_usb_port_callback(cvmx_usb_state_t *usb,
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cvmx_usb_callback_t reason,
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cvmx_usb_complete_t status,
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int pipe_handle,
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int submit_handle,
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int bytes_transferred,
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void *user_data)
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{
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struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
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spin_unlock(&priv->lock);
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usb_hcd_poll_rh_status(octeon_to_hcd(priv));
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spin_lock(&priv->lock);
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}
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static int octeon_usb_start(struct usb_hcd *hcd)
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{
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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unsigned long flags;
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hcd->state = HC_STATE_RUNNING;
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spin_lock_irqsave(&priv->lock, flags);
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cvmx_usb_register_callback(&priv->usb, CVMX_USB_CALLBACK_PORT_CHANGED,
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octeon_usb_port_callback, NULL);
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spin_unlock_irqrestore(&priv->lock, flags);
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return 0;
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}
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static void octeon_usb_stop(struct usb_hcd *hcd)
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{
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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unsigned long flags;
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spin_lock_irqsave(&priv->lock, flags);
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cvmx_usb_register_callback(&priv->usb, CVMX_USB_CALLBACK_PORT_CHANGED,
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NULL, NULL);
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spin_unlock_irqrestore(&priv->lock, flags);
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hcd->state = HC_STATE_HALT;
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}
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static int octeon_usb_get_frame_number(struct usb_hcd *hcd)
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{
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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return cvmx_usb_get_frame_number(&priv->usb);
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}
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static void octeon_usb_urb_complete_callback(cvmx_usb_state_t *usb,
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cvmx_usb_callback_t reason,
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cvmx_usb_complete_t status,
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int pipe_handle,
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int submit_handle,
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int bytes_transferred,
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void *user_data)
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{
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struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
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struct usb_hcd *hcd = octeon_to_hcd(priv);
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struct device *dev = hcd->self.controller;
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struct urb *urb = user_data;
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urb->actual_length = bytes_transferred;
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urb->hcpriv = NULL;
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if (!list_empty(&urb->urb_list)) {
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/*
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* It is on the dequeue_list, but we are going to call
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* usb_hcd_giveback_urb(), so we must clear it from
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* the list. We got to it before the
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* octeon_usb_urb_dequeue_work() tasklet did.
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*/
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list_del(&urb->urb_list);
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/* No longer on the dequeue_list. */
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INIT_LIST_HEAD(&urb->urb_list);
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}
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/* For Isochronous transactions we need to update the URB packet status
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list from data in our private copy */
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if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
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int i;
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/*
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* The pointer to the private list is stored in the setup_packet
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* field.
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*/
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cvmx_usb_iso_packet_t *iso_packet = (cvmx_usb_iso_packet_t *) urb->setup_packet;
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/* Recalculate the transfer size by adding up each packet */
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urb->actual_length = 0;
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for (i = 0; i < urb->number_of_packets; i++) {
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if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) {
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urb->iso_frame_desc[i].status = 0;
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urb->iso_frame_desc[i].actual_length = iso_packet[i].length;
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urb->actual_length += urb->iso_frame_desc[i].actual_length;
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} else {
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dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n",
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i, urb->number_of_packets,
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iso_packet[i].status, pipe_handle,
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submit_handle, iso_packet[i].length);
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urb->iso_frame_desc[i].status = -EREMOTEIO;
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}
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}
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/* Free the private list now that we don't need it anymore */
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kfree(iso_packet);
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urb->setup_packet = NULL;
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}
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switch (status) {
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case CVMX_USB_COMPLETE_SUCCESS:
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urb->status = 0;
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break;
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case CVMX_USB_COMPLETE_CANCEL:
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if (urb->status == 0)
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urb->status = -ENOENT;
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break;
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case CVMX_USB_COMPLETE_STALL:
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dev_dbg(dev, "status=stall pipe=%d submit=%d size=%d\n",
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pipe_handle, submit_handle, bytes_transferred);
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urb->status = -EPIPE;
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break;
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case CVMX_USB_COMPLETE_BABBLEERR:
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dev_dbg(dev, "status=babble pipe=%d submit=%d size=%d\n",
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pipe_handle, submit_handle, bytes_transferred);
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urb->status = -EPIPE;
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break;
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case CVMX_USB_COMPLETE_SHORT:
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dev_dbg(dev, "status=short pipe=%d submit=%d size=%d\n",
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pipe_handle, submit_handle, bytes_transferred);
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urb->status = -EREMOTEIO;
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break;
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case CVMX_USB_COMPLETE_ERROR:
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case CVMX_USB_COMPLETE_XACTERR:
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case CVMX_USB_COMPLETE_DATATGLERR:
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case CVMX_USB_COMPLETE_FRAMEERR:
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dev_dbg(dev, "status=%d pipe=%d submit=%d size=%d\n",
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status, pipe_handle, submit_handle, bytes_transferred);
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urb->status = -EPROTO;
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break;
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}
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spin_unlock(&priv->lock);
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usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status);
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spin_lock(&priv->lock);
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}
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static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
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struct urb *urb,
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gfp_t mem_flags)
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{
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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struct device *dev = hcd->self.controller;
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int submit_handle = -1;
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int pipe_handle;
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unsigned long flags;
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cvmx_usb_iso_packet_t *iso_packet;
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struct usb_host_endpoint *ep = urb->ep;
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urb->status = 0;
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INIT_LIST_HEAD(&urb->urb_list); /* not enqueued on dequeue_list */
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spin_lock_irqsave(&priv->lock, flags);
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if (!ep->hcpriv) {
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cvmx_usb_transfer_t transfer_type;
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cvmx_usb_speed_t speed;
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int split_device = 0;
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int split_port = 0;
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switch (usb_pipetype(urb->pipe)) {
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case PIPE_ISOCHRONOUS:
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transfer_type = CVMX_USB_TRANSFER_ISOCHRONOUS;
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break;
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case PIPE_INTERRUPT:
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transfer_type = CVMX_USB_TRANSFER_INTERRUPT;
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break;
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case PIPE_CONTROL:
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transfer_type = CVMX_USB_TRANSFER_CONTROL;
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break;
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default:
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transfer_type = CVMX_USB_TRANSFER_BULK;
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break;
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}
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switch (urb->dev->speed) {
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case USB_SPEED_LOW:
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speed = CVMX_USB_SPEED_LOW;
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break;
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case USB_SPEED_FULL:
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speed = CVMX_USB_SPEED_FULL;
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break;
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default:
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speed = CVMX_USB_SPEED_HIGH;
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break;
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}
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/*
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* For slow devices on high speed ports we need to find the hub
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* that does the speed translation so we know where to send the
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* split transactions.
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*/
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if (speed != CVMX_USB_SPEED_HIGH) {
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/*
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* Start at this device and work our way up the usb
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* tree.
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*/
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struct usb_device *dev = urb->dev;
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while (dev->parent) {
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/*
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* If our parent is high speed then he'll
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* receive the splits.
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*/
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if (dev->parent->speed == USB_SPEED_HIGH) {
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split_device = dev->parent->devnum;
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split_port = dev->portnum;
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break;
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}
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/*
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* Move up the tree one level. If we make it all
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* the way up the tree, then the port must not
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* be in high speed mode and we don't need a
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* split.
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*/
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dev = dev->parent;
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}
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}
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pipe_handle = cvmx_usb_open_pipe(&priv->usb,
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0,
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usb_pipedevice(urb->pipe),
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usb_pipeendpoint(urb->pipe),
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speed,
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le16_to_cpu(ep->desc.wMaxPacketSize) & 0x7ff,
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transfer_type,
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usb_pipein(urb->pipe) ? CVMX_USB_DIRECTION_IN : CVMX_USB_DIRECTION_OUT,
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urb->interval,
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(le16_to_cpu(ep->desc.wMaxPacketSize) >> 11) & 0x3,
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split_device,
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split_port);
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if (pipe_handle < 0) {
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spin_unlock_irqrestore(&priv->lock, flags);
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dev_dbg(dev, "Failed to create pipe\n");
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return -ENOMEM;
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}
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ep->hcpriv = (void *)(0x10000L + pipe_handle);
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} else {
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pipe_handle = 0xffff & (long)ep->hcpriv;
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}
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switch (usb_pipetype(urb->pipe)) {
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case PIPE_ISOCHRONOUS:
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dev_dbg(dev, "Submit isochronous to %d.%d\n",
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usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
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/*
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* Allocate a structure to use for our private list of
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* isochronous packets.
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*/
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iso_packet = kmalloc(urb->number_of_packets * sizeof(cvmx_usb_iso_packet_t), GFP_ATOMIC);
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if (iso_packet) {
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int i;
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/* Fill the list with the data from the URB */
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for (i = 0; i < urb->number_of_packets; i++) {
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iso_packet[i].offset = urb->iso_frame_desc[i].offset;
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iso_packet[i].length = urb->iso_frame_desc[i].length;
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iso_packet[i].status = CVMX_USB_COMPLETE_ERROR;
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}
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/*
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* Store a pointer to the list in the URB setup_packet
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* field. We know this currently isn't being used and
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* this saves us a bunch of logic.
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*/
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urb->setup_packet = (char *)iso_packet;
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submit_handle = cvmx_usb_submit_isochronous(&priv->usb, pipe_handle,
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urb->start_frame,
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0 /* flags */ ,
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urb->number_of_packets,
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iso_packet,
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urb->transfer_dma,
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urb->transfer_buffer_length,
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octeon_usb_urb_complete_callback,
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urb);
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/*
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* If submit failed we need to free our private packet
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* list.
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*/
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if (submit_handle < 0) {
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urb->setup_packet = NULL;
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kfree(iso_packet);
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}
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}
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break;
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case PIPE_INTERRUPT:
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dev_dbg(dev, "Submit interrupt to %d.%d\n",
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usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
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submit_handle = cvmx_usb_submit_interrupt(&priv->usb, pipe_handle,
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urb->transfer_dma,
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urb->transfer_buffer_length,
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octeon_usb_urb_complete_callback,
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urb);
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break;
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case PIPE_CONTROL:
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dev_dbg(dev, "Submit control to %d.%d\n",
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usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
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submit_handle = cvmx_usb_submit_control(&priv->usb, pipe_handle,
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urb->setup_dma,
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urb->transfer_dma,
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urb->transfer_buffer_length,
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octeon_usb_urb_complete_callback,
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urb);
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break;
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case PIPE_BULK:
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dev_dbg(dev, "Submit bulk to %d.%d\n",
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usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
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submit_handle = cvmx_usb_submit_bulk(&priv->usb, pipe_handle,
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urb->transfer_dma,
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urb->transfer_buffer_length,
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octeon_usb_urb_complete_callback,
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urb);
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break;
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}
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if (submit_handle < 0) {
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spin_unlock_irqrestore(&priv->lock, flags);
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dev_dbg(dev, "Failed to submit\n");
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return -ENOMEM;
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}
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urb->hcpriv = (void *)(long)(((submit_handle & 0xffff) << 16) | pipe_handle);
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spin_unlock_irqrestore(&priv->lock, flags);
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return 0;
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}
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static void octeon_usb_urb_dequeue_work(unsigned long arg)
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{
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unsigned long flags;
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struct octeon_hcd *priv = (struct octeon_hcd *)arg;
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spin_lock_irqsave(&priv->lock, flags);
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while (!list_empty(&priv->dequeue_list)) {
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int pipe_handle;
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int submit_handle;
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struct urb *urb = container_of(priv->dequeue_list.next, struct urb, urb_list);
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list_del(&urb->urb_list);
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/* not enqueued on dequeue_list */
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INIT_LIST_HEAD(&urb->urb_list);
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pipe_handle = 0xffff & (long)urb->hcpriv;
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submit_handle = ((long)urb->hcpriv) >> 16;
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cvmx_usb_cancel(&priv->usb, pipe_handle, submit_handle);
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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}
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static int octeon_usb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
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{
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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unsigned long flags;
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if (!urb->dev)
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return -EINVAL;
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spin_lock_irqsave(&priv->lock, flags);
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urb->status = status;
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list_add_tail(&urb->urb_list, &priv->dequeue_list);
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spin_unlock_irqrestore(&priv->lock, flags);
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tasklet_schedule(&priv->dequeue_tasklet);
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return 0;
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}
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static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
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{
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struct device *dev = hcd->self.controller;
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if (ep->hcpriv) {
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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int pipe_handle = 0xffff & (long)ep->hcpriv;
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unsigned long flags;
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spin_lock_irqsave(&priv->lock, flags);
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cvmx_usb_cancel_all(&priv->usb, pipe_handle);
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if (cvmx_usb_close_pipe(&priv->usb, pipe_handle))
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dev_dbg(dev, "Closing pipe %d failed\n", pipe_handle);
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spin_unlock_irqrestore(&priv->lock, flags);
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ep->hcpriv = NULL;
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}
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}
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static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf)
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{
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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cvmx_usb_port_status_t port_status;
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unsigned long flags;
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spin_lock_irqsave(&priv->lock, flags);
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port_status = cvmx_usb_get_status(&priv->usb);
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spin_unlock_irqrestore(&priv->lock, flags);
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buf[0] = 0;
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buf[0] = port_status.connect_change << 1;
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return (buf[0] != 0);
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}
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static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength)
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{
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struct octeon_hcd *priv = hcd_to_octeon(hcd);
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struct device *dev = hcd->self.controller;
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cvmx_usb_port_status_t usb_port_status;
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int port_status;
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struct usb_hub_descriptor *desc;
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unsigned long flags;
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switch (typeReq) {
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case ClearHubFeature:
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dev_dbg(dev, "ClearHubFeature\n");
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switch (wValue) {
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case C_HUB_LOCAL_POWER:
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case C_HUB_OVER_CURRENT:
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/* Nothing required here */
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break;
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default:
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return -EINVAL;
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}
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break;
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case ClearPortFeature:
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dev_dbg(dev, "ClearPortFeature\n");
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if (wIndex != 1) {
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dev_dbg(dev, " INVALID\n");
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return -EINVAL;
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}
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|
|
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);
|