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/**
* @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);
/*
* 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__ */