| /* |
| * 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; |
| struct cvmx_usb_state 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(struct cvmx_usb_state *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(struct cvmx_usb_state *usb, |
| enum cvmx_usb_callback reason, |
| enum cvmx_usb_complete 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(struct cvmx_usb_state *usb, |
| enum cvmx_usb_callback reason, |
| enum cvmx_usb_complete 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. |
| */ |
| struct cvmx_usb_iso_packet *iso_packet = |
| (struct cvmx_usb_iso_packet *) 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; |
| struct cvmx_usb_iso_packet *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) { |
| enum cvmx_usb_transfer transfer_type; |
| enum cvmx_usb_speed 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(struct cvmx_usb_iso_packet), |
| 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); |
| struct cvmx_usb_port_status 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; |
| struct cvmx_usb_port_status 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); |