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freebsd-skq/sys/contrib/octeon-sdk/cvmx-usb.h
jmallett 3dc9275fe3 Update the port of FreeBSD to Cavium Octeon to use the Cavium Simple Executive 
library:
o) Increase inline unit / large function growth limits for MIPS to accommodate
   the needs of the Simple Executive, which uses a shocking amount of inlining.
o) Remove TARGET_OCTEON and use CPU_CNMIPS to do things required by cnMIPS and
   the Octeon SoC.
o) Add OCTEON_VENDOR_LANNER to use Lanner's allocation of vendor-specific
   board numbers, specifically to support the MR320.
o) Add OCTEON_BOARD_CAPK_0100ND to hard-wire configuration for the CAPK-0100nd,
   which improperly uses an evaluation board's board number and breaks board
   detection at runtime.  This board is sold by Portwell as the CAM-0100.
o) Add support for the RTC available on some Octeon boards.
o) Add support for the Octeon PCI bus.  Note that rman_[sg]et_virtual for IO
   ports can not work unless building for n64.
o) Clean up the CompactFlash driver to use Simple Executive macros and
   structures where possible (it would be advisable to use the Simple Executive
   API to set the PIO mode, too, but that is not done presently.)  Also use
   structures from FreeBSD's ATA layer rather than structures copied from
   Linux.
o) Print available Octeon SoC features on boot.
o) Add support for the Octeon timecounter.
o) Use the Simple Executive's routines rather than local copies for doing reads
   and writes to 64-bit addresses and use its macros for various device
   addresses rather than using local copies.
o) Rename octeon_board_real to octeon_is_simulation to reduce differences with
   Cavium-provided code originally written for Linux.  Also make it use the
   same simplified test that the Simple Executive and Linux both use rather
   than our complex one.
o) Add support for the Octeon CIU, which is the main interrupt unit, as a bus
   to use normal interrupt allocation and setup routines.
o) Use the Simple Executive's bootmem facility to allocate physical memory for
   the kernel, rather than assuming we know which addresses we can steal.
   NB: This may reduce the amount of RAM the kernel reports you as having if
       you are leaving large temporary allocations made by U-Boot allocated
       when starting FreeBSD.
o) Add a port of the Cavium-provided Ethernet driver for Linux.  This changes
   Ethernet interface naming from rgmxN to octeN.  The new driver has vast
   improvements over the old one, both in performance and functionality, but
   does still have some features which have not been ported entirely and there
   may be unimplemented code that can be hit in everyday use.  I will make
   every effort to correct those as they are reported.
o) Support loading the kernel on non-contiguous cores.
o) Add very conservative support for harvesting randomness from the Octeon
   random number device.
o) Turn SMP on by default.
o) Clean up the style of the Octeon kernel configurations a little and make
   them compile with -march=octeon.
o) Add support for the Lanner MR320 and the CAPK-0100nd to the Simple
   Executive.
o) Modify the Simple Executive to build on FreeBSD and to build without
   executive-config.h or cvmx-config.h.  In the future we may want to
   revert part of these changes and supply executive-config.h and
   cvmx-config.h and access to the options contained in those files via
   kernel configuration files.
o) Modify the Simple Executive USB routines to support getting and setting
   of the USB PID.
2010-07-20 19:25:11 +00:00

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/***********************license start***************
* Copyright (c) 2003-2008 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.
*
* 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.
*
*
* For any questions regarding licensing please contact marketing@caviumnetworks.com
*
***********************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_DEVICE_SETUP, /**< This is called in device mode when a control channels receives
a setup header */
__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_DEVICE_MODE = 1<<2, /**< Program the USB port for device mode instead of host mode */
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_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 stadnard 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 stadnard 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);
/**
* Enable an endpoint for use in device mode. After this call
* transactions will be allowed over the endpoint. This must be
* called after every usb reset.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param endpoint_num
* The endpoint number to enable (0-4)
* @param transfer_type
* USB transfer type of this endpoint
* @param transfer_dir
* Direction of transfer relative to Octeon
* @param max_packet_size
* Maximum packet size support by this endpoint
* @param buffer Buffer to send/receive
* @param buffer_length
* Length of the buffer in bytes
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_device_enable_endpoint(cvmx_usb_state_t *state,
int endpoint_num,
cvmx_usb_transfer_t transfer_type,
cvmx_usb_direction_t transfer_dir,
int max_packet_size,
uint64_t buffer,
int buffer_length);
/**
* Disable an endpoint in device mode.
*
* @param state USB device state populated by
* cvmx_usb_initialize().
* @param endpoint_num
* The endpoint number to disable (0-4)
*
* @return CVMX_USB_SUCCESS or a negative error code defined in
* cvmx_usb_status_t.
*/
extern cvmx_usb_status_t cvmx_usb_device_disable_endpoint(cvmx_usb_state_t *state,
int endpoint_num);
/*
* The FreeBSD host driver uses these functions to manipulate the toggle to deal
* more easily with endpoint management.
*/
extern void cvmx_usb_set_toggle(cvmx_usb_state_t *state, int endpoint_num, int toggle);
extern int cvmx_usb_get_toggle(cvmx_usb_state_t *state, int endpoint_num);
#ifdef __cplusplus
}
#endif
#endif /* __CVMX_USB_H__ */
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