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Commit b164935b authored by Aaro Koskinen's avatar Aaro Koskinen Committed by Greg Kroah-Hartman
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staging: MIPS: add Octeon USB HCD support 

Add support for Octeon USB HCD. Tested on EdgeRouter Lite with USB
mass storage.

The driver has been extracted from GPL sources of EdgeRouter Lite firmware
(based on Linux 2.6.32.13). Some minor fixes and cleanups have been done
to make it work with 3.10-rc3.

$ uname -a
Linux (none) 3.10.0-rc3-edge-00005-g86cb5bc #41 SMP PREEMPT Sat Jun 1 20:41:46 EEST 2013 mips64 GNU/Linux
$ modprobe octeon-usb
[   37.971683] octeon_usb: module is from the staging directory, the quality is unknown, you have been warned.
[   37.983649] OcteonUSB: Detected 1 ports
[   37.999360] OcteonUSB OcteonUSB.0: Octeon Host Controller
[   38.004847] OcteonUSB OcteonUSB.0: new USB bus registered, assigned bus number 1
[   38.012332] OcteonUSB OcteonUSB.0: irq 122, io mem 0x00000000
[   38.019970] hub 1-0:1.0: USB hub found
[   38.023851] hub 1-0:1.0: 1 port detected
[   38.028101] OcteonUSB: Registered HCD for port 0 on irq 122
[   38.391443] usb 1-1: new high-speed USB device number 2 using OcteonUSB
[   38.586922] usb-storage 1-1:1.0: USB Mass Storage device detected
[   38.597375] scsi0 : usb-storage 1-1:1.0
[   39.604111] scsi 0:0:0:0: Direct-Access              USB DISK 2.0     PMAP PQ: 0 ANSI: 4
[   39.619113] sd 0:0:0:0: [sda] 7579008 512-byte logical blocks: (3.88 GB/3.61 GiB)
[   39.630696] sd 0:0:0:0: [sda] Write Protect is off
[   39.635945] sd 0:0:0:0: [sda] No Caching mode page present
[   39.641464] sd 0:0:0:0: [sda] Assuming drive cache: write through
[   39.651341] sd 0:0:0:0: [sda] No Caching mode page present
[   39.656917] sd 0:0:0:0: [sda] Assuming drive cache: write through
[   39.664296]  sda: sda1 sda2
[   39.675574] sd 0:0:0:0: [sda] No Caching mode page present
[   39.681093] sd 0:0:0:0: [sda] Assuming drive cache: write through
[   39.687223] sd 0:0:0:0: [sda] Attached SCSI removable disk
Signed-off-by: default avatarAaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Daney <ddaney.cavm@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 51dd7d29
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drivers/staging/Kconfig
View file @ b164935b
...@@ -62,6 +62,8 @@ source "drivers/staging/line6/Kconfig" ...@@ -62,6 +62,8 @@ source "drivers/staging/line6/Kconfig"
source "drivers/staging/octeon/Kconfig" source "drivers/staging/octeon/Kconfig"
source "drivers/staging/octeon-usb/Kconfig"
source "drivers/staging/serqt_usb2/Kconfig" source "drivers/staging/serqt_usb2/Kconfig"
source "drivers/staging/vt6655/Kconfig" source "drivers/staging/vt6655/Kconfig"
......
drivers/staging/Makefile
View file @ b164935b
...@@ -25,6 +25,7 @@ obj-$(CONFIG_LINE6_USB) += line6/ ...@@ -25,6 +25,7 @@ obj-$(CONFIG_LINE6_USB) += line6/
obj-$(CONFIG_NETLOGIC_XLR_NET) += netlogic/ obj-$(CONFIG_NETLOGIC_XLR_NET) += netlogic/
obj-$(CONFIG_USB_SERIAL_QUATECH2) += serqt_usb2/ obj-$(CONFIG_USB_SERIAL_QUATECH2) += serqt_usb2/
obj-$(CONFIG_OCTEON_ETHERNET) += octeon/ obj-$(CONFIG_OCTEON_ETHERNET) += octeon/
obj-$(CONFIG_OCTEON_USB) += octeon-usb/
obj-$(CONFIG_VT6655) += vt6655/ obj-$(CONFIG_VT6655) += vt6655/
obj-$(CONFIG_VT6656) += vt6656/ obj-$(CONFIG_VT6656) += vt6656/
obj-$(CONFIG_VME_BUS) += vme/ obj-$(CONFIG_VME_BUS) += vme/
......
drivers/staging/octeon-usb/Kconfig 0 → 100644
View file @ b164935b
config OCTEON_USB
tristate "Cavium Networks Octeon USB support"
depends on CPU_CAVIUM_OCTEON && USB
help
This driver supports USB host controller on some Cavium
Networks' products in the Octeon family.
To compile this driver as a module, choose M here. The module
will be called octeon-usb.
drivers/staging/octeon-usb/Makefile 0 → 100644
View file @ b164935b
obj-${CONFIG_OCTEON_USB} := octeon-usb.o
octeon-usb-y := octeon-hcd.o
octeon-usb-y += cvmx-usb.o
drivers/staging/octeon-usb/TODO 0 → 100644
View file @ b164935b
This driver is functional and has been tested on EdgeRouter Lite with
USB mass storage.
TODO:
- kernel coding style
- checkpatch warnings
- dead code elimination
- device tree bindings
- possibly eliminate the extra "hardware abstraction layer"
Contact: Aaro Koskinen <aaro.koskinen@iki.fi>
drivers/staging/octeon-usb/cvmx-usb.c 0 → 100644
View file @ b164935b
This source diff could not be displayed because it is too large. You can view the blob instead.
drivers/staging/octeon-usb/cvmx-usb.h 0 → 100644
View file @ b164935b
/***********************license start***************
* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Cavium Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* "cvmx-usb.h" defines a set of low level USB functions to help
* developers create Octeon USB drivers for various operating
* systems. These functions provide a generic API to the Octeon
* USB blocks, hiding the internal hardware specific
* operations.
*
* At a high level the device driver needs to:
*
* -# Call cvmx_usb_get_num_ports() to get the number of
* supported ports.
* -# Call cvmx_usb_initialize() for each Octeon USB port.
* -# Enable the port using cvmx_usb_enable().
* -# Either periodically, or in an interrupt handler, call
* cvmx_usb_poll() to service USB events.
* -# Manage pipes using cvmx_usb_open_pipe() and
* cvmx_usb_close_pipe().
* -# Manage transfers using cvmx_usb_submit_*() and
* cvmx_usb_cancel*().
* -# Shutdown USB on unload using cvmx_usb_shutdown().
*
* To monitor USB status changes, the device driver must use
* cvmx_usb_register_callback() to register for events that it
* is interested in. Below are a few hints on successfully
* implementing a driver on top of this API.
*
* <h2>Initialization</h2>
*
* When a driver is first loaded, it is normally not necessary
* to bring up the USB port completely. Most operating systems
* expect to initialize and enable the port in two independent
* steps. Normally an operating system will probe hardware,
* initialize anything found, and then enable the hardware.
*
* In the probe phase you should:
* -# Use cvmx_usb_get_num_ports() to determine the number of
* USB port to be supported.
* -# Allocate space for a cvmx_usb_state_t structure for each
* port.
* -# Tell the operating system about each port
*
* In the initialization phase you should:
* -# Use cvmx_usb_initialize() on each port.
* -# Do not call cvmx_usb_enable(). This leaves the USB port in
* the disabled state until the operating system is ready.
*
* Finally, in the enable phase you should:
* -# Call cvmx_usb_enable() on the appropriate port.
* -# Note that some operating system use a RESET instead of an
* enable call. To implement RESET, you should call
* cvmx_usb_disable() followed by cvmx_usb_enable().
*
* <h2>Locking</h2>
*
* All of the functions in the cvmx-usb API assume exclusive
* access to the USB hardware and internal data structures. This
* means that the driver must provide locking as necessary.
*
* In the single CPU state it is normally enough to disable
* interrupts before every call to cvmx_usb*() and enable them
* again after the call is complete. Keep in mind that it is
* very common for the callback handlers to make additional
* calls into cvmx-usb, so the disable/enable must be protected
* against recursion. As an example, the Linux kernel
* local_irq_save() and local_irq_restore() are perfect for this
* in the non SMP case.
*
* In the SMP case, locking is more complicated. For SMP you not
* only need to disable interrupts on the local core, but also
* take a lock to make sure that another core cannot call
* cvmx-usb.
*
* <h2>Port callback</h2>
*
* The port callback prototype needs to look as follows:
*
* void 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);
* - @b usb is the cvmx_usb_state_t for the port.
* - @b reason will always be
* CVMX_USB_CALLBACK_PORT_CHANGED.
* - @b status will always be CVMX_USB_COMPLETE_SUCCESS.
* - @b pipe_handle will always be -1.
* - @b submit_handle will always be -1.
* - @b bytes_transferred will always be 0.
* - @b user_data is the void pointer originally passed along
* with the callback. Use this for any state information you
* need.
*
* The port callback will be called whenever the user plugs /
* unplugs a device from the port. It will not be called when a
* device is plugged / unplugged from a hub connected to the
* root port. Normally all the callback needs to do is tell the
* operating system to poll the root hub for status. Under
* Linux, this is performed by calling usb_hcd_poll_rh_status().
* In the Linux driver we use @b user_data. to pass around the
* Linux "hcd" structure. Once the port callback completes,
* Linux automatically calls octeon_usb_hub_status_data() which
* uses cvmx_usb_get_status() to determine the root port status.
*
* <h2>Complete callback</h2>
*
* The completion callback prototype needs to look as follows:
*
* void 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);
* - @b usb is the cvmx_usb_state_t for the port.
* - @b reason will always be
* CVMX_USB_CALLBACK_TRANSFER_COMPLETE.
* - @b status will be one of the cvmx_usb_complete_t
* enumerations.
* - @b pipe_handle is the handle to the pipe the transaction
* was originally submitted on.
* - @b submit_handle is the handle returned by the original
* cvmx_usb_submit_* call.
* - @b bytes_transferred is the number of bytes successfully
* transferred in the transaction. This will be zero on most
* error conditions.
* - @b user_data is the void pointer originally passed along
* with the callback. Use this for any state information you
* need. For example, the Linux "urb" is stored in here in the
* Linux driver.
*
* In general your callback handler should use @b status and @b
* bytes_transferred to tell the operating system the how the
* transaction completed. Normally the pipe is not changed in
* this callback.
*
* <h2>Canceling transactions</h2>
*
* When a transaction is cancelled using cvmx_usb_cancel*(), the
* actual length of time until the complete callback is called
* can vary greatly. It may be called before cvmx_usb_cancel*()
* returns, or it may be called a number of usb frames in the
* future once the hardware frees the transaction. In either of
* these cases, the complete handler will receive
* CVMX_USB_COMPLETE_CANCEL.
*
* <h2>Handling pipes</h2>
*
* USB "pipes" is a software construct created by this API to
* enable the ordering of usb transactions to a device endpoint.
* Octeon's underlying hardware doesn't have any concept
* equivalent to "pipes". The hardware instead has eight
* channels that can be used simultaneously to have up to eight
* transaction in process at the same time. In order to maintain
* ordering in a pipe, the transactions for a pipe will only be
* active in one hardware channel at a time. From an API user's
* perspective, this doesn't matter but it can be helpful to
* keep this in mind when you are probing hardware while
* debugging.
*
* Also keep in mind that usb transactions contain state
* information about the previous transaction to the same
* endpoint. Each transaction has a PID toggle that changes 0/1
* between each sub packet. This is maintained in the pipe data
* structures. For this reason, you generally cannot create and
* destroy a pipe for every transaction. A sequence of
* transaction to the same endpoint must use the same pipe.
*
* <h2>Root Hub</h2>
*
* Some operating systems view the usb root port as a normal usb
* hub. These systems attempt to control the root hub with
* messages similar to the usb 2.0 spec for hub control and
* status. For these systems it may be necessary to write
* function to decode standard usb control messages into
* equivalent cvmx-usb API calls. As an example, the following
* code is used under Linux for some of the basic hub control
* messages.
*
* @code
* static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength)
* {
* cvmx_usb_state_t *usb = (cvmx_usb_state_t *)hcd->hcd_priv;
* cvmx_usb_port_status_t usb_port_status;
* int port_status;
* struct usb_hub_descriptor *desc;
* unsigned long flags;
*
* switch (typeReq)
* {
* case ClearHubFeature:
* DEBUG_ROOT_HUB("OcteonUSB: ClearHubFeature\n");
* switch (wValue)
* {
* case C_HUB_LOCAL_POWER:
* case C_HUB_OVER_CURRENT:
* // Nothing required here
* break;
* default:
* return -EINVAL;
* }
* break;
* case ClearPortFeature:
* DEBUG_ROOT_HUB("OcteonUSB: ClearPortFeature");
* if (wIndex != 1)
* {
* DEBUG_ROOT_HUB(" INVALID\n");
* return -EINVAL;
* }
*
* switch (wValue)
* {
* case USB_PORT_FEAT_ENABLE:
* DEBUG_ROOT_HUB(" ENABLE");
* local_irq_save(flags);
* cvmx_usb_disable(usb);
* local_irq_restore(flags);
* break;
* case USB_PORT_FEAT_SUSPEND:
* DEBUG_ROOT_HUB(" SUSPEND");
* // Not supported on Octeon
* break;
* case USB_PORT_FEAT_POWER:
* DEBUG_ROOT_HUB(" POWER");
* // Not supported on Octeon
* break;
* case USB_PORT_FEAT_INDICATOR:
* DEBUG_ROOT_HUB(" INDICATOR");
* // Port inidicator not supported
* break;
* case USB_PORT_FEAT_C_CONNECTION:
* DEBUG_ROOT_HUB(" C_CONNECTION");
* // Clears drivers internal connect status change flag
* cvmx_usb_set_status(usb, cvmx_usb_get_status(usb));
* break;
* case USB_PORT_FEAT_C_RESET:
* DEBUG_ROOT_HUB(" C_RESET");
* // Clears the driver's internal Port Reset Change flag
* cvmx_usb_set_status(usb, cvmx_usb_get_status(usb));
* break;
* case USB_PORT_FEAT_C_ENABLE:
* DEBUG_ROOT_HUB(" C_ENABLE");
* // Clears the driver's internal Port Enable/Disable Change flag
* cvmx_usb_set_status(usb, cvmx_usb_get_status(usb));
* break;
* case USB_PORT_FEAT_C_SUSPEND:
* DEBUG_ROOT_HUB(" C_SUSPEND");
* // 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:
* DEBUG_ROOT_HUB(" C_OVER_CURRENT");
* // Clears the driver's overcurrent Change flag
* cvmx_usb_set_status(usb, cvmx_usb_get_status(usb));
* break;
* default:
* DEBUG_ROOT_HUB(" UNKNOWN\n");
* return -EINVAL;
* }
* DEBUG_ROOT_HUB("\n");
* break;
* case GetHubDescriptor:
* DEBUG_ROOT_HUB("OcteonUSB: 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->bitmap[0] = 0;
* desc->bitmap[1] = 0xff;
* break;
* case GetHubStatus:
* DEBUG_ROOT_HUB("OcteonUSB: GetHubStatus\n");
* *(__le32 *)buf = 0;
* break;
* case GetPortStatus:
* DEBUG_ROOT_HUB("OcteonUSB: GetPortStatus");
* if (wIndex != 1)
* {
* DEBUG_ROOT_HUB(" INVALID\n");
* return -EINVAL;
* }
*
* usb_port_status = cvmx_usb_get_status(usb);
* port_status = 0;
*
* if (usb_port_status.connect_change)
* {
* port_status |= (1 << USB_PORT_FEAT_C_CONNECTION);
* DEBUG_ROOT_HUB(" C_CONNECTION");
* }
*
* if (usb_port_status.port_enabled)
* {
* port_status |= (1 << USB_PORT_FEAT_C_ENABLE);
* DEBUG_ROOT_HUB(" C_ENABLE");
* }
*
* if (usb_port_status.connected)
* {
* port_status |= (1 << USB_PORT_FEAT_CONNECTION);
* DEBUG_ROOT_HUB(" CONNECTION");
* }
*
* if (usb_port_status.port_enabled)
* {
* port_status |= (1 << USB_PORT_FEAT_ENABLE);
* DEBUG_ROOT_HUB(" ENABLE");
* }
*
* if (usb_port_status.port_over_current)
* {
* port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT);
* DEBUG_ROOT_HUB(" OVER_CURRENT");
* }
*
* if (usb_port_status.port_powered)
* {
* port_status |= (1 << USB_PORT_FEAT_POWER);
* DEBUG_ROOT_HUB(" POWER");
* }
*
* if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH)
* {
* port_status |= (1 << USB_PORT_FEAT_HIGHSPEED);
* DEBUG_ROOT_HUB(" HIGHSPEED");
* }
* else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW)
* {
* port_status |= (1 << USB_PORT_FEAT_LOWSPEED);
* DEBUG_ROOT_HUB(" LOWSPEED");
* }
*
* *((__le32 *)buf) = cpu_to_le32(port_status);
* DEBUG_ROOT_HUB("\n");
* break;
* case SetHubFeature:
* DEBUG_ROOT_HUB("OcteonUSB: SetHubFeature\n");
* // No HUB features supported
* break;
* case SetPortFeature:
* DEBUG_ROOT_HUB("OcteonUSB: SetPortFeature");
* if (wIndex != 1)
* {
* DEBUG_ROOT_HUB(" INVALID\n");
* return -EINVAL;
* }
*
* switch (wValue)
* {
* case USB_PORT_FEAT_SUSPEND:
* DEBUG_ROOT_HUB(" SUSPEND\n");
* return -EINVAL;
* case USB_PORT_FEAT_POWER:
* DEBUG_ROOT_HUB(" POWER\n");
* return -EINVAL;
* case USB_PORT_FEAT_RESET:
* DEBUG_ROOT_HUB(" RESET\n");
* local_irq_save(flags);
* cvmx_usb_disable(usb);
* if (cvmx_usb_enable(usb))
* DEBUG_ERROR("Failed to enable the port\n");
* local_irq_restore(flags);
* return 0;
* case USB_PORT_FEAT_INDICATOR:
* DEBUG_ROOT_HUB(" INDICATOR\n");
* // Not supported
* break;
* default:
* DEBUG_ROOT_HUB(" UNKNOWN\n");
* return -EINVAL;
* }
* break;
* default:
* DEBUG_ROOT_HUB("OcteonUSB: Unknown root hub request\n");
* return -EINVAL;
* }
* return 0;
* }
* @endcode
*
* <h2>Interrupts</h2>
*
* If you plan on using usb interrupts, cvmx_usb_poll() must be
* called on every usb interrupt. It will read the usb state,
* call any needed callbacks, and schedule transactions as
* needed. Your device driver needs only to hookup an interrupt
* handler and call cvmx_usb_poll(). Octeon's usb port 0 causes
* CIU bit CIU_INT*_SUM0[USB] to be set (bit 56). For port 1,
* CIU bit CIU_INT_SUM1[USB1] is set (bit 17). How these bits
* are turned into interrupt numbers is operating system
* specific. For Linux, there are the convenient defines
* OCTEON_IRQ_USB0 and OCTEON_IRQ_USB1 for the IRQ numbers.
*
* If you aren't using interrupts, simple call cvmx_usb_poll()
* in your main processing loop.
*
* <hr>$Revision: 32636 $<hr>
*/
#ifndef __CVMX_USB_H__
#define __CVMX_USB_H__
#ifdef __cplusplus
extern "C" {
#endif
/**
* Enumerations representing the status of function calls.
*/
typedef enum
{
CVMX_USB_SUCCESS = 0, /**< There were no errors */
CVMX_USB_INVALID_PARAM = -1, /**< A parameter to the function was invalid */
CVMX_USB_NO_MEMORY = -2, /**< Insufficient resources were available for the request */
CVMX_USB_BUSY = -3, /**< The resource is busy and cannot service the request */
CVMX_USB_TIMEOUT = -4, /**< Waiting for an action timed out */
CVMX_USB_INCORRECT_MODE = -5, /**< The function call doesn't work in the current USB
mode. This happens when host only functions are
called in device mode or vice versa */
} cvmx_usb_status_t;
/**
* Enumerations representing the possible USB device speeds
*/
typedef enum
{
CVMX_USB_SPEED_HIGH = 0, /**< Device is operation at 480Mbps */
CVMX_USB_SPEED_FULL = 1, /**< Device is operation at 12Mbps */
CVMX_USB_SPEED_LOW = 2, /**< Device is operation at 1.5Mbps */
} cvmx_usb_speed_t;
/**
* Enumeration representing the possible USB transfer types.
*/
typedef enum
{
CVMX_USB_TRANSFER_CONTROL = 0, /**< USB transfer type control for hub and status transfers */
CVMX_USB_TRANSFER_ISOCHRONOUS = 1, /**< USB transfer type isochronous for low priority periodic transfers */
CVMX_USB_TRANSFER_BULK = 2, /**< USB transfer type bulk for large low priority transfers */
CVMX_USB_TRANSFER_INTERRUPT = 3, /**< USB transfer type interrupt for high priority periodic transfers */
} cvmx_usb_transfer_t;
/**
* Enumeration of the transfer directions
*/
typedef enum
{
CVMX_USB_DIRECTION_OUT, /**< Data is transferring from Octeon to the device/host */
CVMX_USB_DIRECTION_IN, /**< Data is transferring from the device/host to Octeon */
} cvmx_usb_direction_t;
/**
* Enumeration of all possible status codes passed to callback
* functions.
*/
typedef enum
{
CVMX_USB_COMPLETE_SUCCESS, /**< The transaction / operation finished without any errors */
CVMX_USB_COMPLETE_SHORT, /**< FIXME: This is currently not implemented */
CVMX_USB_COMPLETE_CANCEL, /**< The transaction was canceled while in flight by a user call to cvmx_usb_cancel* */
CVMX_USB_COMPLETE_ERROR, /**< The transaction aborted with an unexpected error status */
CVMX_USB_COMPLETE_STALL, /**< The transaction received a USB STALL response from the device */
CVMX_USB_COMPLETE_XACTERR, /**< The transaction failed with an error from the device even after a number of retries */
CVMX_USB_COMPLETE_DATATGLERR, /**< The transaction failed with a data toggle error even after a number of retries */
CVMX_USB_COMPLETE_BABBLEERR, /**< The transaction failed with a babble error */
CVMX_USB_COMPLETE_FRAMEERR, /**< The transaction failed with a frame error even after a number of retries */
} cvmx_usb_complete_t;
/**
* Structure returned containing the USB port status information.
*/
typedef struct
{
uint32_t reserved : 25;
uint32_t port_enabled : 1; /**< 1 = Usb port is enabled, 0 = disabled */
uint32_t port_over_current : 1; /**< 1 = Over current detected, 0 = Over current not detected. Octeon doesn't support over current detection */
uint32_t port_powered : 1; /**< 1 = Port power is being supplied to the device, 0 = power is off. Octeon doesn't support turning port power off */
cvmx_usb_speed_t port_speed : 2; /**< Current port speed */
uint32_t connected : 1; /**< 1 = A device is connected to the port, 0 = No device is connected */
uint32_t connect_change : 1; /**< 1 = Device connected state changed since the last set status call */
} cvmx_usb_port_status_t;
/**
* This is the structure of a Control packet header
*/
typedef union
{
uint64_t u64;
struct
{
uint64_t request_type : 8; /**< Bit 7 tells the direction: 1=IN, 0=OUT */
uint64_t request : 8; /**< The standard usb request to make */
uint64_t value : 16; /**< Value parameter for the request in little endian format */
uint64_t index : 16; /**< Index for the request in little endian format */
uint64_t length : 16; /**< Length of the data associated with this request in little endian format */
} s;
} cvmx_usb_control_header_t;
/**
* Descriptor for Isochronous packets
*/
typedef struct
{
int offset; /**< This is the offset in bytes into the main buffer where this data is stored */
int length; /**< This is the length in bytes of the data */
cvmx_usb_complete_t status; /**< This is the status of this individual packet transfer */
} cvmx_usb_iso_packet_t;
/**
* Possible callback reasons for the USB API.
*/
typedef enum
{
CVMX_USB_CALLBACK_TRANSFER_COMPLETE,
/**< A callback of this type is called when a submitted transfer
completes. The completion callback will be called even if the
transfer fails or is canceled. The status parameter will
contain details of why he callback was called. */
CVMX_USB_CALLBACK_PORT_CHANGED, /**< The status of the port changed. For example, someone may have
plugged a device in. The status parameter contains
CVMX_USB_COMPLETE_SUCCESS. Use cvmx_usb_get_status() to get
the new port status. */
__CVMX_USB_CALLBACK_END /**< Do not use. Used internally for array bounds */
} cvmx_usb_callback_t;
/**
* USB state internal data. The contents of this structure
* may change in future SDKs. No data in it should be referenced
* by user's of this API.
*/
typedef struct
{
char data[65536];
} cvmx_usb_state_t;
/**
* USB callback functions are always of the following type.
* The parameters are as follows:
* - state = USB device state populated by
* cvmx_usb_initialize().
* - reason = The cvmx_usb_callback_t used to register
* the callback.
* - status = The cvmx_usb_complete_t representing the
* status code of a transaction.
* - pipe_handle = The Pipe that caused this callback, or
* -1 if this callback wasn't associated with a pipe.
* - submit_handle = Transfer submit handle causing this
* callback, or -1 if this callback wasn't associated
* with a transfer.
* - Actual number of bytes transfer.
* - user_data = The user pointer supplied to the
* function cvmx_usb_submit() or
* cvmx_usb_register_callback() */
typedef void (*cvmx_usb_callback_func_t)(cvmx_usb_state_t *state,
cvmx_usb_callback_t reason,
cvmx_usb_complete_t status,
int pipe_handle, int submit_handle,
int bytes_transferred, void *user_data);
/**
* Flags to pass the initialization function.
*/
typedef enum
{
CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_XI = 1<<0, /**< The USB port uses a 12MHz crystal as clock source
at USB_XO and USB_XI. */
CVMX_USB_INITIALIZE_FLAGS_CLOCK_XO_GND = 1<<1, /**< The USB port uses 12/24/48MHz 2.5V board clock
source at USB_XO. USB_XI should be tied to GND.*/
CVMX_USB_INITIALIZE_FLAGS_CLOCK_AUTO = 0, /**< Automatically determine clock type based on function
in cvmx-helper-board.c. */
CVMX_USB_INITIALIZE_FLAGS_CLOCK_MHZ_MASK = 3<<3, /**< Mask for clock speed field */
CVMX_USB_INITIALIZE_FLAGS_CLOCK_12MHZ = 1<<3, /**< Speed of reference clock or crystal */
CVMX_USB_INITIALIZE_FLAGS_CLOCK_24MHZ = 2<<3, /**< Speed of reference clock */
CVMX_USB_INITIALIZE_FLAGS_CLOCK_48MHZ = 3<<3, /**< Speed of reference clock */
/* Bits 3-4 used to encode the clock frequency */
CVMX_USB_INITIALIZE_FLAGS_NO_DMA = 1<<5, /**< Disable DMA and used polled IO for data transfer use for the USB */
CVMX_USB_INITIALIZE_FLAGS_DEBUG_TRANSFERS = 1<<16, /**< Enable extra console output for debugging USB transfers */
CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLBACKS = 1<<17, /**< Enable extra console output for debugging USB callbacks */
CVMX_USB_INITIALIZE_FLAGS_DEBUG_INFO = 1<<18, /**< Enable extra console output for USB informational data */
CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLS = 1<<19, /**< Enable extra console output for every function call */
CVMX_USB_INITIALIZE_FLAGS_DEBUG_CSRS = 1<<20, /**< Enable extra console output for every CSR access */
CVMX_USB_INITIALIZE_FLAGS_DEBUG_ALL = ((CVMX_USB_INITIALIZE_FLAGS_DEBUG_CSRS<<1)-1) - (CVMX_USB_INITIALIZE_FLAGS_DEBUG_TRANSFERS-1),
} cvmx_usb_initialize_flags_t;
/**
* Flags for passing when a pipe is created. Currently no flags
* need to be passed.
*/
typedef enum
{
CVMX_USB_PIPE_FLAGS_DEBUG_TRANSFERS = 1<<15,/**< Used to display CVMX_USB_INITIALIZE_FLAGS_DEBUG_TRANSFERS for a specific pipe only */
__CVMX_USB_PIPE_FLAGS_OPEN = 1<<16, /**< Used internally to determine if a pipe is open. Do not use */
__CVMX_USB_PIPE_FLAGS_SCHEDULED = 1<<17, /**< Used internally to determine if a pipe is actively using hardware. Do not use */
__CVMX_USB_PIPE_FLAGS_NEED_PING = 1<<18, /**< Used internally to determine if a high speed pipe is in the ping state. Do not use */
} cvmx_usb_pipe_flags_t;
/**
* Return the number of USB ports supported by this Octeon
* chip. If the chip doesn't support USB, or is not supported
* by this API, a zero will be returned. Most Octeon chips
* support one usb port, but some support two ports.
* cvmx_usb_initialize() must be called on independent
* cvmx_usb_state_t structures.
*
* @return Number of port, zero if usb isn't supported
*/
extern int cvmx_usb_get_num_ports(void);
/**
* Initialize a USB port for use. This must be called before any
* other access to the Octeon USB port is made. The port starts
* off in the disabled state.
*
* @param state Pointer to an empty cvmx_usb_state_t structure
* that will be populated by the initialize call.
* This structure is then passed to all other USB
* functions.
* @param usb_port_number
* Which Octeon USB port to initialize.
* @param flags Flags to control hardware initialization. See
* cvmx_usb_initialize_flags_t for the flag
* definitions. Some flags are mandatory.
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_initialize(cvmx_usb_state_t *state,
int usb_port_number,
cvmx_usb_initialize_flags_t flags);
/**
* Shutdown a USB port after a call to cvmx_usb_initialize().
* The port should be disabled with all pipes closed when this
* function is called.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_shutdown(cvmx_usb_state_t *state);
/**
* Enable a USB port. After this call succeeds, the USB port is
* online and servicing requests.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_enable(cvmx_usb_state_t *state);
/**
* Disable a USB port. After this call the USB port will not
* generate data transfers and will not generate events.
* Transactions in process will fail and call their
* associated callbacks.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_disable(cvmx_usb_state_t *state);
/**
* Get the current state of the USB port. Use this call to
* determine if the usb port has anything connected, is enabled,
* or has some sort of error condition. The return value of this
* call has "changed" bits to signal of the value of some fields
* have changed between calls. These "changed" fields are based
* on the last call to cvmx_usb_set_status(). In order to clear
* them, you must update the status through cvmx_usb_set_status().
*
* @param state USB device state populated by
* cvmx_usb_initialize().
*
* @return Port status information
*/
extern cvmx_usb_port_status_t cvmx_usb_get_status(cvmx_usb_state_t *state);
/**
* Set the current state of the USB port. The status is used as
* a reference for the "changed" bits returned by
* cvmx_usb_get_status(). Other than serving as a reference, the
* status passed to this function is not used. No fields can be
* changed through this call.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param port_status
* Port status to set, most like returned by cvmx_usb_get_status()
*/
extern void cvmx_usb_set_status(cvmx_usb_state_t *state, cvmx_usb_port_status_t port_status);
/**
* Open a virtual pipe between the host and a USB device. A pipe
* must be opened before data can be transferred between a device
* and Octeon.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param flags Optional pipe flags defined in
* cvmx_usb_pipe_flags_t.
* @param device_addr
* USB device address to open the pipe to
* (0-127).
* @param endpoint_num
* USB endpoint number to open the pipe to
* (0-15).
* @param device_speed
* The speed of the device the pipe is going
* to. This must match the device's speed,
* which may be different than the port speed.
* @param max_packet The maximum packet length the device can
* transmit/receive (low speed=0-8, full
* speed=0-1023, high speed=0-1024). This value
* comes from the standard endpoint descriptor
* field wMaxPacketSize bits <10:0>.
* @param transfer_type
* The type of transfer this pipe is for.
* @param transfer_dir
* The direction the pipe is in. This is not
* used for control pipes.
* @param interval For ISOCHRONOUS and INTERRUPT transfers,
* this is how often the transfer is scheduled
* for. All other transfers should specify
* zero. The units are in frames (8000/sec at
* high speed, 1000/sec for full speed).
* @param multi_count
* For high speed devices, this is the maximum
* allowed number of packet per microframe.
* Specify zero for non high speed devices. This
* value comes from the standard endpoint descriptor
* field wMaxPacketSize bits <12:11>.
* @param hub_device_addr
* Hub device address this device is connected
* to. Devices connected directly to Octeon
* use zero. This is only used when the device
* is full/low speed behind a high speed hub.
* The address will be of the high speed hub,
* not and full speed hubs after it.
* @param hub_port Which port on the hub the device is
* connected. Use zero for devices connected
* directly to Octeon. Like hub_device_addr,
* this is only used for full/low speed
* devices behind a high speed hub.
*
* @return A non negative value is a pipe handle. Negative
* values are failure codes from cvmx_usb_status_t.
*/
extern int cvmx_usb_open_pipe(cvmx_usb_state_t *state,
cvmx_usb_pipe_flags_t flags,
int device_addr, int endpoint_num,
cvmx_usb_speed_t device_speed, int max_packet,
cvmx_usb_transfer_t transfer_type,
cvmx_usb_direction_t transfer_dir, int interval,
int multi_count, int hub_device_addr,
int hub_port);
/**
* Call to submit a USB Bulk transfer to a pipe.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* Handle to the pipe for the transfer.
* @param buffer Physical address of the data buffer in
* memory. Note that this is NOT A POINTER, but
* the full 64bit physical address of the
* buffer. This may be zero if buffer_length is
* zero.
* @param buffer_length
* Length of buffer in bytes.
* @param callback Function to call when this transaction
* completes. If the return value of this
* function isn't an error, then this function
* is guaranteed to be called when the
* transaction completes. If this parameter is
* NULL, then the generic callback registered
* through cvmx_usb_register_callback is
* called. If both are NULL, then there is no
* way to know when a transaction completes.
* @param user_data User supplied data returned when the
* callback is called. This is only used if
* callback in not NULL.
*
* @return A submitted transaction handle or negative on
* failure. Negative values are failure codes from
* cvmx_usb_status_t.
*/
extern int cvmx_usb_submit_bulk(cvmx_usb_state_t *state, int pipe_handle,
uint64_t buffer, int buffer_length,
cvmx_usb_callback_func_t callback,
void *user_data);
/**
* Call to submit a USB Interrupt transfer to a pipe.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* Handle to the pipe for the transfer.
* @param buffer Physical address of the data buffer in
* memory. Note that this is NOT A POINTER, but
* the full 64bit physical address of the
* buffer. This may be zero if buffer_length is
* zero.
* @param buffer_length
* Length of buffer in bytes.
* @param callback Function to call when this transaction
* completes. If the return value of this
* function isn't an error, then this function
* is guaranteed to be called when the
* transaction completes. If this parameter is
* NULL, then the generic callback registered
* through cvmx_usb_register_callback is
* called. If both are NULL, then there is no
* way to know when a transaction completes.
* @param user_data User supplied data returned when the
* callback is called. This is only used if
* callback in not NULL.
*
* @return A submitted transaction handle or negative on
* failure. Negative values are failure codes from
* cvmx_usb_status_t.
*/
extern int cvmx_usb_submit_interrupt(cvmx_usb_state_t *state, int pipe_handle,
uint64_t buffer, int buffer_length,
cvmx_usb_callback_func_t callback,
void *user_data);
/**
* Call to submit a USB Control transfer to a pipe.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* Handle to the pipe for the transfer.
* @param control_header
* USB 8 byte control header physical address.
* Note that this is NOT A POINTER, but the
* full 64bit physical address of the buffer.
* @param buffer Physical address of the data buffer in
* memory. Note that this is NOT A POINTER, but
* the full 64bit physical address of the
* buffer. This may be zero if buffer_length is
* zero.
* @param buffer_length
* Length of buffer in bytes.
* @param callback Function to call when this transaction
* completes. If the return value of this
* function isn't an error, then this function
* is guaranteed to be called when the
* transaction completes. If this parameter is
* NULL, then the generic callback registered
* through cvmx_usb_register_callback is
* called. If both are NULL, then there is no
* way to know when a transaction completes.
* @param user_data User supplied data returned when the
* callback is called. This is only used if
* callback in not NULL.
*
* @return A submitted transaction handle or negative on
* failure. Negative values are failure codes from
* cvmx_usb_status_t.
*/
extern int cvmx_usb_submit_control(cvmx_usb_state_t *state, int pipe_handle,
uint64_t control_header,
uint64_t buffer, int buffer_length,
cvmx_usb_callback_func_t callback,
void *user_data);
/**
* Flags to pass the cvmx_usb_submit_isochronous() function.
*/
typedef enum
{
CVMX_USB_ISOCHRONOUS_FLAGS_ALLOW_SHORT = 1<<0, /**< Do not return an error if a transfer is less than the maximum packet size of the device */
CVMX_USB_ISOCHRONOUS_FLAGS_ASAP = 1<<1, /**< Schedule the transaction as soon as possible */
} cvmx_usb_isochronous_flags_t;
/**
* Call to submit a USB Isochronous transfer to a pipe.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* Handle to the pipe for the transfer.
* @param start_frame
* Number of frames into the future to schedule
* this transaction.
* @param flags Flags to control the transfer. See
* cvmx_usb_isochronous_flags_t for the flag
* definitions.
* @param number_packets
* Number of sequential packets to transfer.
* "packets" is a pointer to an array of this
* many packet structures.
* @param packets Description of each transfer packet as
* defined by cvmx_usb_iso_packet_t. The array
* pointed to here must stay valid until the
* complete callback is called.
* @param buffer Physical address of the data buffer in
* memory. Note that this is NOT A POINTER, but
* the full 64bit physical address of the
* buffer. This may be zero if buffer_length is
* zero.
* @param buffer_length
* Length of buffer in bytes.
* @param callback Function to call when this transaction
* completes. If the return value of this
* function isn't an error, then this function
* is guaranteed to be called when the
* transaction completes. If this parameter is
* NULL, then the generic callback registered
* through cvmx_usb_register_callback is
* called. If both are NULL, then there is no
* way to know when a transaction completes.
* @param user_data User supplied data returned when the
* callback is called. This is only used if
* callback in not NULL.
*
* @return A submitted transaction handle or negative on
* failure. Negative values are failure codes from
* cvmx_usb_status_t.
*/
extern int cvmx_usb_submit_isochronous(cvmx_usb_state_t *state, int pipe_handle,
int start_frame, int flags,
int number_packets,
cvmx_usb_iso_packet_t packets[],
uint64_t buffer, int buffer_length,
cvmx_usb_callback_func_t callback,
void *user_data);
/**
* Cancel one outstanding request in a pipe. Canceling a request
* can fail if the transaction has already completed before cancel
* is called. Even after a successful cancel call, it may take
* a frame or two for the cvmx_usb_poll() function to call the
* associated callback.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* Pipe handle to cancel requests in.
* @param submit_handle
* Handle to transaction to cancel, returned by the submit function.
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_cancel(cvmx_usb_state_t *state,
int pipe_handle, int submit_handle);
/**
* Cancel all outstanding requests in a pipe. Logically all this
* does is call cvmx_usb_cancel() in a loop.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* Pipe handle to cancel requests in.
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_cancel_all(cvmx_usb_state_t *state,
int pipe_handle);
/**
* Close a pipe created with cvmx_usb_open_pipe().
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param pipe_handle
* Pipe handle to close.
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t. CVMX_USB_BUSY is returned if the
* pipe has outstanding transfers.
*/
extern cvmx_usb_status_t cvmx_usb_close_pipe(cvmx_usb_state_t *state,
int pipe_handle);
/**
* Register a function to be called when various USB events occur.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param reason Which event to register for.
* @param callback Function to call when the event occurs.
* @param user_data User data parameter to the function.
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_register_callback(cvmx_usb_state_t *state,
cvmx_usb_callback_t reason,
cvmx_usb_callback_func_t callback,
void *user_data);
/**
* Get the current USB protocol level frame number. The frame
* number is always in the range of 0-0x7ff.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
*
* @return USB frame number
*/
extern int cvmx_usb_get_frame_number(cvmx_usb_state_t *state);
/**
* Poll the USB block for status and call all needed callback
* handlers. This function is meant to be called in the interrupt
* handler for the USB controller. It can also be called
* periodically in a loop for non-interrupt based operation.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_poll(cvmx_usb_state_t *state);
#ifdef __cplusplus
}
#endif
#endif /* __CVMX_USB_H__ */
drivers/staging/octeon-usb/cvmx-usbcx-defs.h 0 → 100644
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drivers/staging/octeon-usb/cvmx-usbnx-defs.h 0 → 100644
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drivers/staging/octeon-usb/octeon-hcd.c 0 → 100644
View file @ b164935b
/*
* 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/platform_device.h>
#include <linux/usb.h>
#include <asm/time.h>
#include <asm/delay.h>
#include <asm/octeon/cvmx.h>
#include "cvmx-usb.h"
#include <asm/octeon/cvmx-iob-defs.h>
#include <linux/usb/hcd.h>
//#define DEBUG_CALL(format, ...) printk(format, ##__VA_ARGS__)
#define DEBUG_CALL(format, ...) do {} while (0)
//#define DEBUG_SUBMIT(format, ...) printk(format, ##__VA_ARGS__)
#define DEBUG_SUBMIT(format, ...) do {} while (0)
//#define DEBUG_ROOT_HUB(format, ...) printk(format, ##__VA_ARGS__)
#define DEBUG_ROOT_HUB(format, ...) do {} while (0)
//#define DEBUG_ERROR(format, ...) printk(format, ##__VA_ARGS__)
#define DEBUG_ERROR(format, ...) do {} while (0)
#define DEBUG_FATAL(format, ...) printk(format, ##__VA_ARGS__)
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;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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);
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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);
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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 urb *urb = user_data;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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
{
DEBUG_ERROR("%s: ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n",
__FUNCTION__, 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:
DEBUG_ERROR("%s: status=stall pipe=%d submit=%d size=%d\n", __FUNCTION__, pipe_handle, submit_handle, bytes_transferred);
urb->status = -EPIPE;
break;
case CVMX_USB_COMPLETE_BABBLEERR:
DEBUG_ERROR("%s: status=babble pipe=%d submit=%d size=%d\n", __FUNCTION__, pipe_handle, submit_handle, bytes_transferred);
urb->status = -EPIPE;
break;
case CVMX_USB_COMPLETE_SHORT:
DEBUG_ERROR("%s: status=short pipe=%d submit=%d size=%d\n", __FUNCTION__, 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:
DEBUG_ERROR("%s: status=%d pipe=%d submit=%d size=%d\n", __FUNCTION__, 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);
int submit_handle = -1;
int pipe_handle;
unsigned long flags;
cvmx_usb_iso_packet_t *iso_packet;
struct usb_host_endpoint *ep = urb->ep;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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);
DEBUG_ERROR("OcteonUSB: %s failed to create pipe\n", __FUNCTION__);
return -ENOMEM;
}
ep->hcpriv = (void*)(0x10000L + pipe_handle);
}
else
pipe_handle = 0xffff & (long)ep->hcpriv;
switch (usb_pipetype(urb->pipe))
{
case PIPE_ISOCHRONOUS:
DEBUG_SUBMIT("OcteonUSB: %s submit isochronous to %d.%d\n", __FUNCTION__, 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 uthe URB setup_pakcet 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:
DEBUG_SUBMIT("OcteonUSB: %s submit interrupt to %d.%d\n", __FUNCTION__, 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:
DEBUG_SUBMIT("OcteonUSB: %s submit control to %d.%d\n", __FUNCTION__, 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:
DEBUG_SUBMIT("OcteonUSB: %s submit bulk to %d.%d\n", __FUNCTION__, 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);
DEBUG_ERROR("OcteonUSB: %s failed to submit\n", __FUNCTION__);
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;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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)
{
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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))
DEBUG_ERROR("OcteonUSB: 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;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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);
cvmx_usb_port_status_t usb_port_status;
int port_status;
struct usb_hub_descriptor *desc;
unsigned long flags;
switch (typeReq)
{
case ClearHubFeature:
DEBUG_ROOT_HUB("OcteonUSB: ClearHubFeature\n");
switch (wValue)
{
case C_HUB_LOCAL_POWER:
case C_HUB_OVER_CURRENT:
/* Nothing required here */
break;
default:
return -EINVAL;
}
break;
case ClearPortFeature:
DEBUG_ROOT_HUB("OcteonUSB: ClearPortFeature");
if (wIndex != 1)
{
DEBUG_ROOT_HUB(" INVALID\n");
return -EINVAL;
}
switch (wValue)
{
case USB_PORT_FEAT_ENABLE:
DEBUG_ROOT_HUB(" ENABLE");
spin_lock_irqsave(&priv->lock, flags);
cvmx_usb_disable(&priv->usb);
spin_unlock_irqrestore(&priv->lock, flags);
break;
case USB_PORT_FEAT_SUSPEND:
DEBUG_ROOT_HUB(" SUSPEND");
/* Not supported on Octeon */
break;
case USB_PORT_FEAT_POWER:
DEBUG_ROOT_HUB(" POWER");
/* Not supported on Octeon */
break;
case USB_PORT_FEAT_INDICATOR:
DEBUG_ROOT_HUB(" INDICATOR");
/* Port inidicator not supported */
break;
case USB_PORT_FEAT_C_CONNECTION:
DEBUG_ROOT_HUB(" C_CONNECTION");
/* 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:
DEBUG_ROOT_HUB(" C_RESET");
/* 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:
DEBUG_ROOT_HUB(" C_ENABLE");
/* 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:
DEBUG_ROOT_HUB(" C_SUSPEND");
/* 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:
DEBUG_ROOT_HUB(" C_OVER_CURRENT");
/* 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:
DEBUG_ROOT_HUB(" UNKNOWN\n");
return -EINVAL;
}
DEBUG_ROOT_HUB("\n");
break;
case GetHubDescriptor:
DEBUG_ROOT_HUB("OcteonUSB: 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:
DEBUG_ROOT_HUB("OcteonUSB: GetHubStatus\n");
*(__le32 *)buf = 0;
break;
case GetPortStatus:
DEBUG_ROOT_HUB("OcteonUSB: GetPortStatus");
if (wIndex != 1)
{
DEBUG_ROOT_HUB(" 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);
DEBUG_ROOT_HUB(" C_CONNECTION");
}
if (usb_port_status.port_enabled)
{
port_status |= (1 << USB_PORT_FEAT_C_ENABLE);
DEBUG_ROOT_HUB(" C_ENABLE");
}
if (usb_port_status.connected)
{
port_status |= (1 << USB_PORT_FEAT_CONNECTION);
DEBUG_ROOT_HUB(" CONNECTION");
}
if (usb_port_status.port_enabled)
{
port_status |= (1 << USB_PORT_FEAT_ENABLE);
DEBUG_ROOT_HUB(" ENABLE");
}
if (usb_port_status.port_over_current)
{
port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT);
DEBUG_ROOT_HUB(" OVER_CURRENT");
}
if (usb_port_status.port_powered)
{
port_status |= (1 << USB_PORT_FEAT_POWER);
DEBUG_ROOT_HUB(" POWER");
}
if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH)
{
port_status |= USB_PORT_STAT_HIGH_SPEED;
DEBUG_ROOT_HUB(" HIGHSPEED");
}
else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW)
{
port_status |= (1 << USB_PORT_FEAT_LOWSPEED);
DEBUG_ROOT_HUB(" LOWSPEED");
}
*((__le32 *)buf) = cpu_to_le32(port_status);
DEBUG_ROOT_HUB("\n");
break;
case SetHubFeature:
DEBUG_ROOT_HUB("OcteonUSB: SetHubFeature\n");
/* No HUB features supported */
break;
case SetPortFeature:
DEBUG_ROOT_HUB("OcteonUSB: SetPortFeature");
if (wIndex != 1)
{
DEBUG_ROOT_HUB(" INVALID\n");
return -EINVAL;
}
switch (wValue)
{
case USB_PORT_FEAT_SUSPEND:
DEBUG_ROOT_HUB(" SUSPEND\n");
return -EINVAL;
case USB_PORT_FEAT_POWER:
DEBUG_ROOT_HUB(" POWER\n");
return -EINVAL;
case USB_PORT_FEAT_RESET:
DEBUG_ROOT_HUB(" RESET\n");
spin_lock_irqsave(&priv->lock, flags);
cvmx_usb_disable(&priv->usb);
if (cvmx_usb_enable(&priv->usb))
DEBUG_ERROR("Failed to enable the port\n");
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
case USB_PORT_FEAT_INDICATOR:
DEBUG_ROOT_HUB(" INDICATOR\n");
/* Not supported */
break;
default:
DEBUG_ROOT_HUB(" UNKNOWN\n");
return -EINVAL;
}
break;
default:
DEBUG_ROOT_HUB("OcteonUSB: 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;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
/* 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)
{
DEBUG_FATAL("OcteonUSB: 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 | CVMX_USB_INITIALIZE_FLAGS_DEBUG_INFO | CVMX_USB_INITIALIZE_FLAGS_DEBUG_TRANSFERS | CVMX_USB_INITIALIZE_FLAGS_DEBUG_CALLBACKS);
status = cvmx_usb_initialize(&priv->usb, usb_num, CVMX_USB_INITIALIZE_FLAGS_CLOCK_AUTO);
if (status)
{
DEBUG_FATAL("OcteonUSB: 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)
{
DEBUG_FATAL("OcteonUSB: USB add HCD failed with %d\n", status);
kfree(hcd);
return -1;
}
printk("OcteonUSB: 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;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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)
DEBUG_FATAL("OcteonUSB: 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
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))
{
DEBUG_FATAL("OcteonUSB: Failed to register driver\n");
return -ENOMEM;
}
octeon_usb_registered = 1;
printk("OcteonUSB: Detected %d ports\n", num_devices);
/*
* 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 (!pdev)
{
DEBUG_FATAL("OcteonUSB: Failed to allocate platform device for USB%d\n", device);
return -ENOMEM;
}
if (device < MAX_USB_PORTS)
pdev_glob[device] = pdev;
}
return 0;
}
static void __exit octeon_usb_module_cleanup(void)
{
int i;
DEBUG_CALL("OcteonUSB: %s called\n", __FUNCTION__);
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);
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