LCOV - code coverage report
Current view: top level - drivers/usb/host/dwc_common_port - dwc_os.h (source / functions) Hit Total Coverage
Test: gcov_data_raspi2_real_modules_combined.info Lines: 1 1 100.0 %
Date: 2020-09-30 20:25:40 Functions: 0 0 -
Branches: 4 284 1.4 %

           Branch data     Line data    Source code
       1                 :            : /* =========================================================================
       2                 :            :  * $File: //dwh/usb_iip/dev/software/dwc_common_port_2/dwc_os.h $
       3                 :            :  * $Revision: #14 $
       4                 :            :  * $Date: 2010/11/04 $
       5                 :            :  * $Change: 1621695 $
       6                 :            :  *
       7                 :            :  * Synopsys Portability Library Software and documentation
       8                 :            :  * (hereinafter, "Software") is an Unsupported proprietary work of
       9                 :            :  * Synopsys, Inc. unless otherwise expressly agreed to in writing
      10                 :            :  * between Synopsys and you.
      11                 :            :  *
      12                 :            :  * The Software IS NOT an item of Licensed Software or Licensed Product
      13                 :            :  * under any End User Software License Agreement or Agreement for
      14                 :            :  * Licensed Product with Synopsys or any supplement thereto. You are
      15                 :            :  * permitted to use and redistribute this Software in source and binary
      16                 :            :  * forms, with or without modification, provided that redistributions
      17                 :            :  * of source code must retain this notice. You may not view, use,
      18                 :            :  * disclose, copy or distribute this file or any information contained
      19                 :            :  * herein except pursuant to this license grant from Synopsys. If you
      20                 :            :  * do not agree with this notice, including the disclaimer below, then
      21                 :            :  * you are not authorized to use the Software.
      22                 :            :  *
      23                 :            :  * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
      24                 :            :  * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      25                 :            :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
      26                 :            :  * FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL
      27                 :            :  * SYNOPSYS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
      28                 :            :  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
      29                 :            :  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
      30                 :            :  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
      31                 :            :  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      32                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
      33                 :            :  * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
      34                 :            :  * DAMAGE.
      35                 :            :  * ========================================================================= */
      36                 :            : #ifndef _DWC_OS_H_
      37                 :            : #define _DWC_OS_H_
      38                 :            : 
      39                 :            : #ifdef __cplusplus
      40                 :            : extern "C" {
      41                 :            : #endif
      42                 :            : 
      43                 :            : /** @file
      44                 :            :  *
      45                 :            :  * DWC portability library, low level os-wrapper functions
      46                 :            :  *
      47                 :            :  */
      48                 :            : 
      49                 :            : /* These basic types need to be defined by some OS header file or custom header
      50                 :            :  * file for your specific target architecture.
      51                 :            :  *
      52                 :            :  * uint8_t, int8_t, uint16_t, int16_t, uint32_t, int32_t, uint64_t, int64_t
      53                 :            :  *
      54                 :            :  * Any custom or alternate header file must be added and enabled here.
      55                 :            :  */
      56                 :            : 
      57                 :            : #ifdef DWC_LINUX
      58                 :            : # include <linux/types.h>
      59                 :            : # ifdef CONFIG_DEBUG_MUTEXES
      60                 :            : #  include <linux/mutex.h>
      61                 :            : # endif
      62                 :            : # include <linux/spinlock.h>
      63                 :            : # include <linux/errno.h>
      64                 :            : # include <stdarg.h>
      65                 :            : #endif
      66                 :            : 
      67                 :            : #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
      68                 :            : # include <os_dep.h>
      69                 :            : #endif
      70                 :            : 
      71                 :            : 
      72                 :            : /** @name Primitive Types and Values */
      73                 :            : 
      74                 :            : /** We define a boolean type for consistency.  Can be either YES or NO */
      75                 :            : typedef uint8_t dwc_bool_t;
      76                 :            : #define YES  1
      77                 :            : #define NO   0
      78                 :            : 
      79                 :            : #ifdef DWC_LINUX
      80                 :            : 
      81                 :            : /** @name Error Codes */
      82                 :            : #define DWC_E_INVALID           EINVAL
      83                 :            : #define DWC_E_NO_MEMORY         ENOMEM
      84                 :            : #define DWC_E_NO_DEVICE         ENODEV
      85                 :            : #define DWC_E_NOT_SUPPORTED     EOPNOTSUPP
      86                 :            : #define DWC_E_TIMEOUT           ETIMEDOUT
      87                 :            : #define DWC_E_BUSY              EBUSY
      88                 :            : #define DWC_E_AGAIN             EAGAIN
      89                 :            : #define DWC_E_RESTART           ERESTART
      90                 :            : #define DWC_E_ABORT             ECONNABORTED
      91                 :            : #define DWC_E_SHUTDOWN          ESHUTDOWN
      92                 :            : #define DWC_E_NO_DATA           ENODATA
      93                 :            : #define DWC_E_DISCONNECT        ECONNRESET
      94                 :            : #define DWC_E_UNKNOWN           EINVAL
      95                 :            : #define DWC_E_NO_STREAM_RES     ENOSR
      96                 :            : #define DWC_E_COMMUNICATION     ECOMM
      97                 :            : #define DWC_E_OVERFLOW          EOVERFLOW
      98                 :            : #define DWC_E_PROTOCOL          EPROTO
      99                 :            : #define DWC_E_IN_PROGRESS       EINPROGRESS
     100                 :            : #define DWC_E_PIPE              EPIPE
     101                 :            : #define DWC_E_IO                EIO
     102                 :            : #define DWC_E_NO_SPACE          ENOSPC
     103                 :            : 
     104                 :            : #else
     105                 :            : 
     106                 :            : /** @name Error Codes */
     107                 :            : #define DWC_E_INVALID           1001
     108                 :            : #define DWC_E_NO_MEMORY         1002
     109                 :            : #define DWC_E_NO_DEVICE         1003
     110                 :            : #define DWC_E_NOT_SUPPORTED     1004
     111                 :            : #define DWC_E_TIMEOUT           1005
     112                 :            : #define DWC_E_BUSY              1006
     113                 :            : #define DWC_E_AGAIN             1007
     114                 :            : #define DWC_E_RESTART           1008
     115                 :            : #define DWC_E_ABORT             1009
     116                 :            : #define DWC_E_SHUTDOWN          1010
     117                 :            : #define DWC_E_NO_DATA           1011
     118                 :            : #define DWC_E_DISCONNECT        2000
     119                 :            : #define DWC_E_UNKNOWN           3000
     120                 :            : #define DWC_E_NO_STREAM_RES     4001
     121                 :            : #define DWC_E_COMMUNICATION     4002
     122                 :            : #define DWC_E_OVERFLOW          4003
     123                 :            : #define DWC_E_PROTOCOL          4004
     124                 :            : #define DWC_E_IN_PROGRESS       4005
     125                 :            : #define DWC_E_PIPE              4006
     126                 :            : #define DWC_E_IO                4007
     127                 :            : #define DWC_E_NO_SPACE          4008
     128                 :            : 
     129                 :            : #endif
     130                 :            : 
     131                 :            : 
     132                 :            : /** @name Tracing/Logging Functions
     133                 :            :  *
     134                 :            :  * These function provide the capability to add tracing, debugging, and error
     135                 :            :  * messages, as well exceptions as assertions.  The WUDEV uses these
     136                 :            :  * extensively.  These could be logged to the main console, the serial port, an
     137                 :            :  * internal buffer, etc.  These functions could also be no-op if they are too
     138                 :            :  * expensive on your system.  By default undefining the DEBUG macro already
     139                 :            :  * no-ops some of these functions. */
     140                 :            : 
     141                 :            : /** Returns non-zero if in interrupt context. */
     142                 :            : extern dwc_bool_t DWC_IN_IRQ(void);
     143                 :            : #define dwc_in_irq DWC_IN_IRQ
     144                 :            : 
     145                 :            : /** Returns "IRQ" if DWC_IN_IRQ is true. */
     146                 :            : static inline char *dwc_irq(void) {
     147   [ #  #  #  #  :        828 :         return DWC_IN_IRQ() ? "IRQ" : "";
          #  #  +  -  +  
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                      # ]
     148                 :            : }
     149                 :            : 
     150                 :            : /** Returns non-zero if in bottom-half context. */
     151                 :            : extern dwc_bool_t DWC_IN_BH(void);
     152                 :            : #define dwc_in_bh DWC_IN_BH
     153                 :            : 
     154                 :            : /** Returns "BH" if DWC_IN_BH is true. */
     155                 :            : static inline char *dwc_bh(void) {
     156                 :            :         return DWC_IN_BH() ? "BH" : "";
     157                 :            : }
     158                 :            : 
     159                 :            : /**
     160                 :            :  * A vprintf() clone.  Just call vprintf if you've got it.
     161                 :            :  */
     162                 :            : extern void DWC_VPRINTF(char *format, va_list args);
     163                 :            : #define dwc_vprintf DWC_VPRINTF
     164                 :            : 
     165                 :            : /**
     166                 :            :  * A vsnprintf() clone.  Just call vprintf if you've got it.
     167                 :            :  */
     168                 :            : extern int DWC_VSNPRINTF(char *str, int size, char *format, va_list args);
     169                 :            : #define dwc_vsnprintf DWC_VSNPRINTF
     170                 :            : 
     171                 :            : /**
     172                 :            :  * printf() clone.  Just call printf if you've go it.
     173                 :            :  */
     174                 :            : extern void DWC_PRINTF(char *format, ...)
     175                 :            : /* This provides compiler level static checking of the parameters if you're
     176                 :            :  * using GCC. */
     177                 :            : #ifdef __GNUC__
     178                 :            :         __attribute__ ((format(printf, 1, 2)));
     179                 :            : #else
     180                 :            :         ;
     181                 :            : #endif
     182                 :            : #define dwc_printf DWC_PRINTF
     183                 :            : 
     184                 :            : /**
     185                 :            :  * sprintf() clone.  Just call sprintf if you've got it.
     186                 :            :  */
     187                 :            : extern int DWC_SPRINTF(char *string, char *format, ...)
     188                 :            : #ifdef __GNUC__
     189                 :            :         __attribute__ ((format(printf, 2, 3)));
     190                 :            : #else
     191                 :            :         ;
     192                 :            : #endif
     193                 :            : #define dwc_sprintf DWC_SPRINTF
     194                 :            : 
     195                 :            : /**
     196                 :            :  * snprintf() clone.  Just call snprintf if you've got it.
     197                 :            :  */
     198                 :            : extern int DWC_SNPRINTF(char *string, int size, char *format, ...)
     199                 :            : #ifdef __GNUC__
     200                 :            :         __attribute__ ((format(printf, 3, 4)));
     201                 :            : #else
     202                 :            :         ;
     203                 :            : #endif
     204                 :            : #define dwc_snprintf DWC_SNPRINTF
     205                 :            : 
     206                 :            : /**
     207                 :            :  * Prints a WARNING message.  On systems that don't differentiate between
     208                 :            :  * warnings and regular log messages, just print it.  Indicates that something
     209                 :            :  * may be wrong with the driver.  Works like printf().
     210                 :            :  *
     211                 :            :  * Use the DWC_WARN macro to call this function.
     212                 :            :  */
     213                 :            : extern void __DWC_WARN(char *format, ...)
     214                 :            : #ifdef __GNUC__
     215                 :            :         __attribute__ ((format(printf, 1, 2)));
     216                 :            : #else
     217                 :            :         ;
     218                 :            : #endif
     219                 :            : 
     220                 :            : /**
     221                 :            :  * Prints an error message.  On systems that don't differentiate between errors
     222                 :            :  * and regular log messages, just print it.  Indicates that something went wrong
     223                 :            :  * with the driver.  Works like printf().
     224                 :            :  *
     225                 :            :  * Use the DWC_ERROR macro to call this function.
     226                 :            :  */
     227                 :            : extern void __DWC_ERROR(char *format, ...)
     228                 :            : #ifdef __GNUC__
     229                 :            :         __attribute__ ((format(printf, 1, 2)));
     230                 :            : #else
     231                 :            :         ;
     232                 :            : #endif
     233                 :            : 
     234                 :            : /**
     235                 :            :  * Prints an exception error message and takes some user-defined action such as
     236                 :            :  * print out a backtrace or trigger a breakpoint.  Indicates that something went
     237                 :            :  * abnormally wrong with the driver such as programmer error, or other
     238                 :            :  * exceptional condition.  It should not be ignored so even on systems without
     239                 :            :  * printing capability, some action should be taken to notify the developer of
     240                 :            :  * it.  Works like printf().
     241                 :            :  */
     242                 :            : extern void DWC_EXCEPTION(char *format, ...)
     243                 :            : #ifdef __GNUC__
     244                 :            :         __attribute__ ((format(printf, 1, 2)));
     245                 :            : #else
     246                 :            :         ;
     247                 :            : #endif
     248                 :            : #define dwc_exception DWC_EXCEPTION
     249                 :            : 
     250                 :            : #ifndef DWC_OTG_DEBUG_LEV
     251                 :            : #define DWC_OTG_DEBUG_LEV 0
     252                 :            : #endif
     253                 :            : 
     254                 :            : #ifdef DEBUG
     255                 :            : /**
     256                 :            :  * Prints out a debug message.  Used for logging/trace messages.
     257                 :            :  *
     258                 :            :  * Use the DWC_DEBUG macro to call this function
     259                 :            :  */
     260                 :            : extern void __DWC_DEBUG(char *format, ...)
     261                 :            : #ifdef __GNUC__
     262                 :            :         __attribute__ ((format(printf, 1, 2)));
     263                 :            : #else
     264                 :            :         ;
     265                 :            : #endif
     266                 :            : #else
     267                 :            : #define __DWC_DEBUG printk
     268                 :            : #endif
     269                 :            : 
     270                 :            : /**
     271                 :            :  * Prints out a Debug message.
     272                 :            :  */
     273                 :            : #define DWC_DEBUG(_format, _args...) __DWC_DEBUG("DEBUG:%s:%s: " _format "\n", \
     274                 :            :                                                  __func__, dwc_irq(), ## _args)
     275                 :            : #define dwc_debug DWC_DEBUG
     276                 :            : /**
     277                 :            :  * Prints out a Debug message if enabled at compile time.
     278                 :            :  */
     279                 :            : #if DWC_OTG_DEBUG_LEV > 0
     280                 :            : #define DWC_DEBUGC(_format, _args...) DWC_DEBUG(_format, ##_args )
     281                 :            : #else
     282                 :            : #define DWC_DEBUGC(_format, _args...)
     283                 :            : #endif
     284                 :            : #define dwc_debugc DWC_DEBUGC
     285                 :            : /**
     286                 :            :  * Prints out an informative message.
     287                 :            :  */
     288                 :            : #define DWC_INFO(_format, _args...) DWC_PRINTF("INFO:%s: " _format "\n", \
     289                 :            :                                                dwc_irq(), ## _args)
     290                 :            : #define dwc_info DWC_INFO
     291                 :            : /**
     292                 :            :  * Prints out an informative message if enabled at compile time.
     293                 :            :  */
     294                 :            : #if DWC_OTG_DEBUG_LEV > 1
     295                 :            : #define DWC_INFOC(_format, _args...) DWC_INFO(_format, ##_args )
     296                 :            : #else
     297                 :            : #define DWC_INFOC(_format, _args...)
     298                 :            : #endif
     299                 :            : #define dwc_infoc DWC_INFOC
     300                 :            : /**
     301                 :            :  * Prints out a warning message.
     302                 :            :  */
     303                 :            : #define DWC_WARN(_format, _args...) __DWC_WARN("WARN:%s:%s:%d: " _format "\n", \
     304                 :            :                                         dwc_irq(), __func__, __LINE__, ## _args)
     305                 :            : #define dwc_warn DWC_WARN
     306                 :            : /**
     307                 :            :  * Prints out an error message.
     308                 :            :  */
     309                 :            : #define DWC_ERROR(_format, _args...) __DWC_ERROR("ERROR:%s:%s:%d: " _format "\n", \
     310                 :            :                                         dwc_irq(), __func__, __LINE__, ## _args)
     311                 :            : #define dwc_error DWC_ERROR
     312                 :            : 
     313                 :            : #define DWC_PROTO_ERROR(_format, _args...) __DWC_WARN("ERROR:%s:%s:%d: " _format "\n", \
     314                 :            :                                                 dwc_irq(), __func__, __LINE__, ## _args)
     315                 :            : #define dwc_proto_error DWC_PROTO_ERROR
     316                 :            : 
     317                 :            : #ifdef DEBUG
     318                 :            : /** Prints out a exception error message if the _expr expression fails.  Disabled
     319                 :            :  * if DEBUG is not enabled. */
     320                 :            : #define DWC_ASSERT(_expr, _format, _args...) do { \
     321                 :            :         if (!(_expr)) { DWC_EXCEPTION("%s:%s:%d: " _format "\n", dwc_irq(), \
     322                 :            :                                       __FILE__, __LINE__, ## _args); } \
     323                 :            :         } while (0)
     324                 :            : #else
     325                 :            : #define DWC_ASSERT(_x...)
     326                 :            : #endif
     327                 :            : #define dwc_assert DWC_ASSERT
     328                 :            : 
     329                 :            : 
     330                 :            : /** @name Byte Ordering
     331                 :            :  * The following functions are for conversions between processor's byte ordering
     332                 :            :  * and specific ordering you want.
     333                 :            :  */
     334                 :            : 
     335                 :            : /** Converts 32 bit data in CPU byte ordering to little endian. */
     336                 :            : extern uint32_t DWC_CPU_TO_LE32(uint32_t *p);
     337                 :            : #define dwc_cpu_to_le32 DWC_CPU_TO_LE32
     338                 :            : 
     339                 :            : /** Converts 32 bit data in CPU byte orderint to big endian. */
     340                 :            : extern uint32_t DWC_CPU_TO_BE32(uint32_t *p);
     341                 :            : #define dwc_cpu_to_be32 DWC_CPU_TO_BE32
     342                 :            : 
     343                 :            : /** Converts 32 bit little endian data to CPU byte ordering. */
     344                 :            : extern uint32_t DWC_LE32_TO_CPU(uint32_t *p);
     345                 :            : #define dwc_le32_to_cpu DWC_LE32_TO_CPU
     346                 :            : 
     347                 :            : /** Converts 32 bit big endian data to CPU byte ordering. */
     348                 :            : extern uint32_t DWC_BE32_TO_CPU(uint32_t *p);
     349                 :            : #define dwc_be32_to_cpu DWC_BE32_TO_CPU
     350                 :            : 
     351                 :            : /** Converts 16 bit data in CPU byte ordering to little endian. */
     352                 :            : extern uint16_t DWC_CPU_TO_LE16(uint16_t *p);
     353                 :            : #define dwc_cpu_to_le16 DWC_CPU_TO_LE16
     354                 :            : 
     355                 :            : /** Converts 16 bit data in CPU byte orderint to big endian. */
     356                 :            : extern uint16_t DWC_CPU_TO_BE16(uint16_t *p);
     357                 :            : #define dwc_cpu_to_be16 DWC_CPU_TO_BE16
     358                 :            : 
     359                 :            : /** Converts 16 bit little endian data to CPU byte ordering. */
     360                 :            : extern uint16_t DWC_LE16_TO_CPU(uint16_t *p);
     361                 :            : #define dwc_le16_to_cpu DWC_LE16_TO_CPU
     362                 :            : 
     363                 :            : /** Converts 16 bit bi endian data to CPU byte ordering. */
     364                 :            : extern uint16_t DWC_BE16_TO_CPU(uint16_t *p);
     365                 :            : #define dwc_be16_to_cpu DWC_BE16_TO_CPU
     366                 :            : 
     367                 :            : 
     368                 :            : /** @name Register Read/Write
     369                 :            :  *
     370                 :            :  * The following six functions should be implemented to read/write registers of
     371                 :            :  * 32-bit and 64-bit sizes.  All modules use this to read/write register values.
     372                 :            :  * The reg value is a pointer to the register calculated from the void *base
     373                 :            :  * variable passed into the driver when it is started.  */
     374                 :            : 
     375                 :            : #ifdef DWC_LINUX
     376                 :            : /* Linux doesn't need any extra parameters for register read/write, so we
     377                 :            :  * just throw away the IO context parameter.
     378                 :            :  */
     379                 :            : /** Reads the content of a 32-bit register. */
     380                 :            : extern uint32_t DWC_READ_REG32(uint32_t volatile *reg);
     381                 :            : #define dwc_read_reg32(_ctx_,_reg_) DWC_READ_REG32(_reg_)
     382                 :            : 
     383                 :            : /** Reads the content of a 64-bit register. */
     384                 :            : extern uint64_t DWC_READ_REG64(uint64_t volatile *reg);
     385                 :            : #define dwc_read_reg64(_ctx_,_reg_) DWC_READ_REG64(_reg_)
     386                 :            : 
     387                 :            : /** Writes to a 32-bit register. */
     388                 :            : extern void DWC_WRITE_REG32(uint32_t volatile *reg, uint32_t value);
     389                 :            : #define dwc_write_reg32(_ctx_,_reg_,_val_) DWC_WRITE_REG32(_reg_, _val_)
     390                 :            : 
     391                 :            : /** Writes to a 64-bit register. */
     392                 :            : extern void DWC_WRITE_REG64(uint64_t volatile *reg, uint64_t value);
     393                 :            : #define dwc_write_reg64(_ctx_,_reg_,_val_) DWC_WRITE_REG64(_reg_, _val_)
     394                 :            : 
     395                 :            : /**
     396                 :            :  * Modify bit values in a register.  Using the
     397                 :            :  * algorithm: (reg_contents & ~clear_mask) | set_mask.
     398                 :            :  */
     399                 :            : extern void DWC_MODIFY_REG32(uint32_t volatile *reg, uint32_t clear_mask, uint32_t set_mask);
     400                 :            : #define dwc_modify_reg32(_ctx_,_reg_,_cmsk_,_smsk_) DWC_MODIFY_REG32(_reg_,_cmsk_,_smsk_)
     401                 :            : extern void DWC_MODIFY_REG64(uint64_t volatile *reg, uint64_t clear_mask, uint64_t set_mask);
     402                 :            : #define dwc_modify_reg64(_ctx_,_reg_,_cmsk_,_smsk_) DWC_MODIFY_REG64(_reg_,_cmsk_,_smsk_)
     403                 :            : 
     404                 :            : #endif  /* DWC_LINUX */
     405                 :            : 
     406                 :            : #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
     407                 :            : typedef struct dwc_ioctx {
     408                 :            :         struct device *dev;
     409                 :            :         bus_space_tag_t iot;
     410                 :            :         bus_space_handle_t ioh;
     411                 :            : } dwc_ioctx_t;
     412                 :            : 
     413                 :            : /** BSD needs two extra parameters for register read/write, so we pass
     414                 :            :  * them in using the IO context parameter.
     415                 :            :  */
     416                 :            : /** Reads the content of a 32-bit register. */
     417                 :            : extern uint32_t DWC_READ_REG32(void *io_ctx, uint32_t volatile *reg);
     418                 :            : #define dwc_read_reg32 DWC_READ_REG32
     419                 :            : 
     420                 :            : /** Reads the content of a 64-bit register. */
     421                 :            : extern uint64_t DWC_READ_REG64(void *io_ctx, uint64_t volatile *reg);
     422                 :            : #define dwc_read_reg64 DWC_READ_REG64
     423                 :            : 
     424                 :            : /** Writes to a 32-bit register. */
     425                 :            : extern void DWC_WRITE_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t value);
     426                 :            : #define dwc_write_reg32 DWC_WRITE_REG32
     427                 :            : 
     428                 :            : /** Writes to a 64-bit register. */
     429                 :            : extern void DWC_WRITE_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t value);
     430                 :            : #define dwc_write_reg64 DWC_WRITE_REG64
     431                 :            : 
     432                 :            : /**
     433                 :            :  * Modify bit values in a register.  Using the
     434                 :            :  * algorithm: (reg_contents & ~clear_mask) | set_mask.
     435                 :            :  */
     436                 :            : extern void DWC_MODIFY_REG32(void *io_ctx, uint32_t volatile *reg, uint32_t clear_mask, uint32_t set_mask);
     437                 :            : #define dwc_modify_reg32 DWC_MODIFY_REG32
     438                 :            : extern void DWC_MODIFY_REG64(void *io_ctx, uint64_t volatile *reg, uint64_t clear_mask, uint64_t set_mask);
     439                 :            : #define dwc_modify_reg64 DWC_MODIFY_REG64
     440                 :            : 
     441                 :            : #endif  /* DWC_FREEBSD || DWC_NETBSD */
     442                 :            : 
     443                 :            : /** @cond */
     444                 :            : 
     445                 :            : /** @name Some convenience MACROS used internally.  Define DWC_DEBUG_REGS to log the
     446                 :            :  * register writes. */
     447                 :            : 
     448                 :            : #ifdef DWC_LINUX
     449                 :            : 
     450                 :            : # ifdef DWC_DEBUG_REGS
     451                 :            : 
     452                 :            : #define dwc_define_read_write_reg_n(_reg,_container_type) \
     453                 :            : static inline uint32_t dwc_read_##_reg##_n(_container_type *container, int num) { \
     454                 :            :         return DWC_READ_REG32(&container->regs->_reg[num]); \
     455                 :            : } \
     456                 :            : static inline void dwc_write_##_reg##_n(_container_type *container, int num, uint32_t data) { \
     457                 :            :         DWC_DEBUG("WRITING %8s[%d]: %p: %08x", #_reg, num, \
     458                 :            :                   &(((uint32_t*)container->regs->_reg)[num]), data); \
     459                 :            :         DWC_WRITE_REG32(&(((uint32_t*)container->regs->_reg)[num]), data); \
     460                 :            : }
     461                 :            : 
     462                 :            : #define dwc_define_read_write_reg(_reg,_container_type) \
     463                 :            : static inline uint32_t dwc_read_##_reg(_container_type *container) { \
     464                 :            :         return DWC_READ_REG32(&container->regs->_reg); \
     465                 :            : } \
     466                 :            : static inline void dwc_write_##_reg(_container_type *container, uint32_t data) { \
     467                 :            :         DWC_DEBUG("WRITING %11s: %p: %08x", #_reg, &container->regs->_reg, data); \
     468                 :            :         DWC_WRITE_REG32(&container->regs->_reg, data); \
     469                 :            : }
     470                 :            : 
     471                 :            : # else  /* DWC_DEBUG_REGS */
     472                 :            : 
     473                 :            : #define dwc_define_read_write_reg_n(_reg,_container_type) \
     474                 :            : static inline uint32_t dwc_read_##_reg##_n(_container_type *container, int num) { \
     475                 :            :         return DWC_READ_REG32(&container->regs->_reg[num]); \
     476                 :            : } \
     477                 :            : static inline void dwc_write_##_reg##_n(_container_type *container, int num, uint32_t data) { \
     478                 :            :         DWC_WRITE_REG32(&(((uint32_t*)container->regs->_reg)[num]), data); \
     479                 :            : }
     480                 :            : 
     481                 :            : #define dwc_define_read_write_reg(_reg,_container_type) \
     482                 :            : static inline uint32_t dwc_read_##_reg(_container_type *container) { \
     483                 :            :         return DWC_READ_REG32(&container->regs->_reg); \
     484                 :            : } \
     485                 :            : static inline void dwc_write_##_reg(_container_type *container, uint32_t data) { \
     486                 :            :         DWC_WRITE_REG32(&container->regs->_reg, data); \
     487                 :            : }
     488                 :            : 
     489                 :            : # endif /* DWC_DEBUG_REGS */
     490                 :            : 
     491                 :            : #endif  /* DWC_LINUX */
     492                 :            : 
     493                 :            : #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
     494                 :            : 
     495                 :            : # ifdef DWC_DEBUG_REGS
     496                 :            : 
     497                 :            : #define dwc_define_read_write_reg_n(_reg,_container_type) \
     498                 :            : static inline uint32_t dwc_read_##_reg##_n(void *io_ctx, _container_type *container, int num) { \
     499                 :            :         return DWC_READ_REG32(io_ctx, &container->regs->_reg[num]); \
     500                 :            : } \
     501                 :            : static inline void dwc_write_##_reg##_n(void *io_ctx, _container_type *container, int num, uint32_t data) { \
     502                 :            :         DWC_DEBUG("WRITING %8s[%d]: %p: %08x", #_reg, num, \
     503                 :            :                   &(((uint32_t*)container->regs->_reg)[num]), data); \
     504                 :            :         DWC_WRITE_REG32(io_ctx, &(((uint32_t*)container->regs->_reg)[num]), data); \
     505                 :            : }
     506                 :            : 
     507                 :            : #define dwc_define_read_write_reg(_reg,_container_type) \
     508                 :            : static inline uint32_t dwc_read_##_reg(void *io_ctx, _container_type *container) { \
     509                 :            :         return DWC_READ_REG32(io_ctx, &container->regs->_reg); \
     510                 :            : } \
     511                 :            : static inline void dwc_write_##_reg(void *io_ctx, _container_type *container, uint32_t data) { \
     512                 :            :         DWC_DEBUG("WRITING %11s: %p: %08x", #_reg, &container->regs->_reg, data); \
     513                 :            :         DWC_WRITE_REG32(io_ctx, &container->regs->_reg, data); \
     514                 :            : }
     515                 :            : 
     516                 :            : # else  /* DWC_DEBUG_REGS */
     517                 :            : 
     518                 :            : #define dwc_define_read_write_reg_n(_reg,_container_type) \
     519                 :            : static inline uint32_t dwc_read_##_reg##_n(void *io_ctx, _container_type *container, int num) { \
     520                 :            :         return DWC_READ_REG32(io_ctx, &container->regs->_reg[num]); \
     521                 :            : } \
     522                 :            : static inline void dwc_write_##_reg##_n(void *io_ctx, _container_type *container, int num, uint32_t data) { \
     523                 :            :         DWC_WRITE_REG32(io_ctx, &(((uint32_t*)container->regs->_reg)[num]), data); \
     524                 :            : }
     525                 :            : 
     526                 :            : #define dwc_define_read_write_reg(_reg,_container_type) \
     527                 :            : static inline uint32_t dwc_read_##_reg(void *io_ctx, _container_type *container) { \
     528                 :            :         return DWC_READ_REG32(io_ctx, &container->regs->_reg); \
     529                 :            : } \
     530                 :            : static inline void dwc_write_##_reg(void *io_ctx, _container_type *container, uint32_t data) { \
     531                 :            :         DWC_WRITE_REG32(io_ctx, &container->regs->_reg, data); \
     532                 :            : }
     533                 :            : 
     534                 :            : # endif /* DWC_DEBUG_REGS */
     535                 :            : 
     536                 :            : #endif  /* DWC_FREEBSD || DWC_NETBSD */
     537                 :            : 
     538                 :            : /** @endcond */
     539                 :            : 
     540                 :            : 
     541                 :            : #ifdef DWC_CRYPTOLIB
     542                 :            : /** @name Crypto Functions
     543                 :            :  *
     544                 :            :  * These are the low-level cryptographic functions used by the driver. */
     545                 :            : 
     546                 :            : /** Perform AES CBC */
     547                 :            : extern int DWC_AES_CBC(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t iv[16], uint8_t *out);
     548                 :            : #define dwc_aes_cbc DWC_AES_CBC
     549                 :            : 
     550                 :            : /** Fill the provided buffer with random bytes.  These should be cryptographic grade random numbers. */
     551                 :            : extern void DWC_RANDOM_BYTES(uint8_t *buffer, uint32_t length);
     552                 :            : #define dwc_random_bytes DWC_RANDOM_BYTES
     553                 :            : 
     554                 :            : /** Perform the SHA-256 hash function */
     555                 :            : extern int DWC_SHA256(uint8_t *message, uint32_t len, uint8_t *out);
     556                 :            : #define dwc_sha256 DWC_SHA256
     557                 :            : 
     558                 :            : /** Calculated the HMAC-SHA256 */
     559                 :            : extern int DWC_HMAC_SHA256(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t *out);
     560                 :            : #define dwc_hmac_sha256 DWC_HMAC_SHA256
     561                 :            : 
     562                 :            : #endif  /* DWC_CRYPTOLIB */
     563                 :            : 
     564                 :            : 
     565                 :            : /** @name Memory Allocation
     566                 :            :  *
     567                 :            :  * These function provide access to memory allocation.  There are only 2 DMA
     568                 :            :  * functions and 3 Regular memory functions that need to be implemented.  None
     569                 :            :  * of the memory debugging routines need to be implemented.  The allocation
     570                 :            :  * routines all ZERO the contents of the memory.
     571                 :            :  *
     572                 :            :  * Defining DWC_DEBUG_MEMORY turns on memory debugging and statistic gathering.
     573                 :            :  * This checks for memory leaks, keeping track of alloc/free pairs.  It also
     574                 :            :  * keeps track of how much memory the driver is using at any given time. */
     575                 :            : 
     576                 :            : #define DWC_PAGE_SIZE 4096
     577                 :            : #define DWC_PAGE_OFFSET(addr) (((uint32_t)addr) & 0xfff)
     578                 :            : #define DWC_PAGE_ALIGNED(addr) ((((uint32_t)addr) & 0xfff) == 0)
     579                 :            : 
     580                 :            : #define DWC_INVALID_DMA_ADDR 0x0
     581                 :            : 
     582                 :            : #ifdef DWC_LINUX
     583                 :            : /** Type for a DMA address */
     584                 :            : typedef dma_addr_t dwc_dma_t;
     585                 :            : #endif
     586                 :            : 
     587                 :            : #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
     588                 :            : typedef bus_addr_t dwc_dma_t;
     589                 :            : #endif
     590                 :            : 
     591                 :            : #ifdef DWC_FREEBSD
     592                 :            : typedef struct dwc_dmactx {
     593                 :            :         struct device *dev;
     594                 :            :         bus_dma_tag_t dma_tag;
     595                 :            :         bus_dmamap_t dma_map;
     596                 :            :         bus_addr_t dma_paddr;
     597                 :            :         void *dma_vaddr;
     598                 :            : } dwc_dmactx_t;
     599                 :            : #endif
     600                 :            : 
     601                 :            : #ifdef DWC_NETBSD
     602                 :            : typedef struct dwc_dmactx {
     603                 :            :         struct device *dev;
     604                 :            :         bus_dma_tag_t dma_tag;
     605                 :            :         bus_dmamap_t dma_map;
     606                 :            :         bus_dma_segment_t segs[1];
     607                 :            :         int nsegs;
     608                 :            :         bus_addr_t dma_paddr;
     609                 :            :         void *dma_vaddr;
     610                 :            : } dwc_dmactx_t;
     611                 :            : #endif
     612                 :            : 
     613                 :            : /* @todo these functions will be added in the future */
     614                 :            : #if 0
     615                 :            : /**
     616                 :            :  * Creates a DMA pool from which you can allocate DMA buffers.  Buffers
     617                 :            :  * allocated from this pool will be guaranteed to meet the size, alignment, and
     618                 :            :  * boundary requirements specified.
     619                 :            :  *
     620                 :            :  * @param[in] size Specifies the size of the buffers that will be allocated from
     621                 :            :  * this pool.
     622                 :            :  * @param[in] align Specifies the byte alignment requirements of the buffers
     623                 :            :  * allocated from this pool.  Must be a power of 2.
     624                 :            :  * @param[in] boundary Specifies the N-byte boundary that buffers allocated from
     625                 :            :  * this pool must not cross.
     626                 :            :  *
     627                 :            :  * @returns A pointer to an internal opaque structure which is not to be
     628                 :            :  * accessed outside of these library functions.  Use this handle to specify
     629                 :            :  * which pools to allocate/free DMA buffers from and also to destroy the pool,
     630                 :            :  * when you are done with it.
     631                 :            :  */
     632                 :            : extern dwc_pool_t *DWC_DMA_POOL_CREATE(uint32_t size, uint32_t align, uint32_t boundary);
     633                 :            : 
     634                 :            : /**
     635                 :            :  * Destroy a DMA pool.  All buffers allocated from that pool must be freed first.
     636                 :            :  */
     637                 :            : extern void DWC_DMA_POOL_DESTROY(dwc_pool_t *pool);
     638                 :            : 
     639                 :            : /**
     640                 :            :  * Allocate a buffer from the specified DMA pool and zeros its contents.
     641                 :            :  */
     642                 :            : extern void *DWC_DMA_POOL_ALLOC(dwc_pool_t *pool, uint64_t *dma_addr);
     643                 :            : 
     644                 :            : /**
     645                 :            :  * Free a previously allocated buffer from the DMA pool.
     646                 :            :  */
     647                 :            : extern void DWC_DMA_POOL_FREE(dwc_pool_t *pool, void *vaddr, void *daddr);
     648                 :            : #endif
     649                 :            : 
     650                 :            : /** Allocates a DMA capable buffer and zeroes its contents. */
     651                 :            : extern void *__DWC_DMA_ALLOC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr);
     652                 :            : 
     653                 :            : /** Allocates a DMA capable buffer and zeroes its contents in atomic contest */
     654                 :            : extern void *__DWC_DMA_ALLOC_ATOMIC(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr);
     655                 :            : 
     656                 :            : /** Frees a previously allocated buffer. */
     657                 :            : extern void __DWC_DMA_FREE(void *dma_ctx, uint32_t size, void *virt_addr, dwc_dma_t dma_addr);
     658                 :            : 
     659                 :            : /** Allocates a block of memory and zeroes its contents. */
     660                 :            : extern void *__DWC_ALLOC(void *mem_ctx, uint32_t size);
     661                 :            : 
     662                 :            : /** Allocates a block of memory and zeroes its contents, in an atomic manner
     663                 :            :  * which can be used inside interrupt context.  The size should be sufficiently
     664                 :            :  * small, a few KB at most, such that failures are not likely to occur.  Can just call
     665                 :            :  * __DWC_ALLOC if it is atomic. */
     666                 :            : extern void *__DWC_ALLOC_ATOMIC(void *mem_ctx, uint32_t size);
     667                 :            : 
     668                 :            : /** Frees a previously allocated buffer. */
     669                 :            : extern void __DWC_FREE(void *mem_ctx, void *addr);
     670                 :            : 
     671                 :            : #ifndef DWC_DEBUG_MEMORY
     672                 :            : 
     673                 :            : #define DWC_ALLOC(_size_) __DWC_ALLOC(NULL, _size_)
     674                 :            : #define DWC_ALLOC_ATOMIC(_size_) __DWC_ALLOC_ATOMIC(NULL, _size_)
     675                 :            : #define DWC_FREE(_addr_) __DWC_FREE(NULL, _addr_)
     676                 :            : 
     677                 :            : # ifdef DWC_LINUX
     678                 :            : #define DWC_DMA_ALLOC(_dev, _size_, _dma_) __DWC_DMA_ALLOC(_dev, _size_, _dma_)
     679                 :            : #define DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_) __DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_)
     680                 :            : #define DWC_DMA_FREE(_dev, _size_,_virt_, _dma_) __DWC_DMA_FREE(_dev, _size_, _virt_, _dma_)
     681                 :            : # endif
     682                 :            : 
     683                 :            : # if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
     684                 :            : #define DWC_DMA_ALLOC __DWC_DMA_ALLOC
     685                 :            : #define DWC_DMA_FREE __DWC_DMA_FREE
     686                 :            : # endif
     687                 :            : extern void *dwc_dma_alloc_atomic_debug(uint32_t size, dwc_dma_t *dma_addr, char const *func, int line);
     688                 :            : 
     689                 :            : #else   /* DWC_DEBUG_MEMORY */
     690                 :            : 
     691                 :            : extern void *dwc_alloc_debug(void *mem_ctx, uint32_t size, char const *func, int line);
     692                 :            : extern void *dwc_alloc_atomic_debug(void *mem_ctx, uint32_t size, char const *func, int line);
     693                 :            : extern void dwc_free_debug(void *mem_ctx, void *addr, char const *func, int line);
     694                 :            : extern void *dwc_dma_alloc_debug(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr,
     695                 :            :                                  char const *func, int line);
     696                 :            : extern void *dwc_dma_alloc_atomic_debug(void *dma_ctx, uint32_t size, dwc_dma_t *dma_addr,
     697                 :            :                                 char const *func, int line);
     698                 :            : extern void dwc_dma_free_debug(void *dma_ctx, uint32_t size, void *virt_addr,
     699                 :            :                                dwc_dma_t dma_addr, char const *func, int line);
     700                 :            : 
     701                 :            : extern int dwc_memory_debug_start(void *mem_ctx);
     702                 :            : extern void dwc_memory_debug_stop(void);
     703                 :            : extern void dwc_memory_debug_report(void);
     704                 :            : 
     705                 :            : #define DWC_ALLOC(_size_) dwc_alloc_debug(NULL, _size_, __func__, __LINE__)
     706                 :            : #define DWC_ALLOC_ATOMIC(_size_) dwc_alloc_atomic_debug(NULL, _size_, \
     707                 :            :                                                         __func__, __LINE__)
     708                 :            : #define DWC_FREE(_addr_) dwc_free_debug(NULL, _addr_, __func__, __LINE__)
     709                 :            : 
     710                 :            : # ifdef DWC_LINUX
     711                 :            : #define DWC_DMA_ALLOC(_dev, _size_, _dma_) \
     712                 :            :         dwc_dma_alloc_debug(_dev, _size_, _dma_, __func__, __LINE__)
     713                 :            : #define DWC_DMA_ALLOC_ATOMIC(_dev, _size_, _dma_) \
     714                 :            :         dwc_dma_alloc_atomic_debug(_dev, _size_, _dma_, __func__, __LINE__)
     715                 :            : #define DWC_DMA_FREE(_dev, _size_, _virt_, _dma_) \
     716                 :            :         dwc_dma_free_debug(_dev, _size_, _virt_, _dma_, __func__, __LINE__)
     717                 :            : # endif
     718                 :            : 
     719                 :            : # if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
     720                 :            : #define DWC_DMA_ALLOC(_ctx_,_size_,_dma_) dwc_dma_alloc_debug(_ctx_, _size_, \
     721                 :            :                                                 _dma_, __func__, __LINE__)
     722                 :            : #define DWC_DMA_FREE(_ctx_,_size_,_virt_,_dma_) dwc_dma_free_debug(_ctx_, _size_, \
     723                 :            :                                                  _virt_, _dma_, __func__, __LINE__)
     724                 :            : # endif
     725                 :            : 
     726                 :            : #endif /* DWC_DEBUG_MEMORY */
     727                 :            : 
     728                 :            : #define dwc_alloc(_ctx_,_size_) DWC_ALLOC(_size_)
     729                 :            : #define dwc_alloc_atomic(_ctx_,_size_) DWC_ALLOC_ATOMIC(_size_)
     730                 :            : #define dwc_free(_ctx_,_addr_) DWC_FREE(_addr_)
     731                 :            : 
     732                 :            : #ifdef DWC_LINUX
     733                 :            : /* Linux doesn't need any extra parameters for DMA buffer allocation, so we
     734                 :            :  * just throw away the DMA context parameter.
     735                 :            :  */
     736                 :            : #define dwc_dma_alloc(_ctx_,_size_,_dma_) DWC_DMA_ALLOC(_size_, _dma_)
     737                 :            : #define dwc_dma_alloc_atomic(_ctx_,_size_,_dma_) DWC_DMA_ALLOC_ATOMIC(_size_, _dma_)
     738                 :            : #define dwc_dma_free(_ctx_,_size_,_virt_,_dma_) DWC_DMA_FREE(_size_, _virt_, _dma_)
     739                 :            : #endif
     740                 :            : 
     741                 :            : #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
     742                 :            : /** BSD needs several extra parameters for DMA buffer allocation, so we pass
     743                 :            :  * them in using the DMA context parameter.
     744                 :            :  */
     745                 :            : #define dwc_dma_alloc DWC_DMA_ALLOC
     746                 :            : #define dwc_dma_free DWC_DMA_FREE
     747                 :            : #endif
     748                 :            : 
     749                 :            : 
     750                 :            : /** @name Memory and String Processing */
     751                 :            : 
     752                 :            : /** memset() clone */
     753                 :            : extern void *DWC_MEMSET(void *dest, uint8_t byte, uint32_t size);
     754                 :            : #define dwc_memset DWC_MEMSET
     755                 :            : 
     756                 :            : /** memcpy() clone */
     757                 :            : extern void *DWC_MEMCPY(void *dest, void const *src, uint32_t size);
     758                 :            : #define dwc_memcpy DWC_MEMCPY
     759                 :            : 
     760                 :            : /** memmove() clone */
     761                 :            : extern void *DWC_MEMMOVE(void *dest, void *src, uint32_t size);
     762                 :            : #define dwc_memmove DWC_MEMMOVE
     763                 :            : 
     764                 :            : /** memcmp() clone */
     765                 :            : extern int DWC_MEMCMP(void *m1, void *m2, uint32_t size);
     766                 :            : #define dwc_memcmp DWC_MEMCMP
     767                 :            : 
     768                 :            : /** strcmp() clone */
     769                 :            : extern int DWC_STRCMP(void *s1, void *s2);
     770                 :            : #define dwc_strcmp DWC_STRCMP
     771                 :            : 
     772                 :            : /** strncmp() clone */
     773                 :            : extern int DWC_STRNCMP(void *s1, void *s2, uint32_t size);
     774                 :            : #define dwc_strncmp DWC_STRNCMP
     775                 :            : 
     776                 :            : /** strlen() clone, for NULL terminated ASCII strings */
     777                 :            : extern int DWC_STRLEN(char const *str);
     778                 :            : #define dwc_strlen DWC_STRLEN
     779                 :            : 
     780                 :            : /** strcpy() clone, for NULL terminated ASCII strings */
     781                 :            : extern char *DWC_STRCPY(char *to, const char *from);
     782                 :            : #define dwc_strcpy DWC_STRCPY
     783                 :            : 
     784                 :            : /** strdup() clone.  If you wish to use memory allocation debugging, this
     785                 :            :  * implementation of strdup should use the DWC_* memory routines instead of
     786                 :            :  * calling a predefined strdup.  Otherwise the memory allocated by this routine
     787                 :            :  * will not be seen by the debugging routines. */
     788                 :            : extern char *DWC_STRDUP(char const *str);
     789                 :            : #define dwc_strdup(_ctx_,_str_) DWC_STRDUP(_str_)
     790                 :            : 
     791                 :            : /** NOT an atoi() clone.  Read the description carefully.  Returns an integer
     792                 :            :  * converted from the string str in base 10 unless the string begins with a "0x"
     793                 :            :  * in which case it is base 16.  String must be a NULL terminated sequence of
     794                 :            :  * ASCII characters and may optionally begin with whitespace, a + or -, and a
     795                 :            :  * "0x" prefix if base 16.  The remaining characters must be valid digits for
     796                 :            :  * the number and end with a NULL character.  If any invalid characters are
     797                 :            :  * encountered or it returns with a negative error code and the results of the
     798                 :            :  * conversion are undefined.  On sucess it returns 0.  Overflow conditions are
     799                 :            :  * undefined.  An example implementation using atoi() can be referenced from the
     800                 :            :  * Linux implementation. */
     801                 :            : extern int DWC_ATOI(const char *str, int32_t *value);
     802                 :            : #define dwc_atoi DWC_ATOI
     803                 :            : 
     804                 :            : /** Same as above but for unsigned. */
     805                 :            : extern int DWC_ATOUI(const char *str, uint32_t *value);
     806                 :            : #define dwc_atoui DWC_ATOUI
     807                 :            : 
     808                 :            : #ifdef DWC_UTFLIB
     809                 :            : /** This routine returns a UTF16LE unicode encoded string from a UTF8 string. */
     810                 :            : extern int DWC_UTF8_TO_UTF16LE(uint8_t const *utf8string, uint16_t *utf16string, unsigned len);
     811                 :            : #define dwc_utf8_to_utf16le DWC_UTF8_TO_UTF16LE
     812                 :            : #endif
     813                 :            : 
     814                 :            : 
     815                 :            : /** @name Wait queues
     816                 :            :  *
     817                 :            :  * Wait queues provide a means of synchronizing between threads or processes.  A
     818                 :            :  * process can block on a waitq if some condition is not true, waiting for it to
     819                 :            :  * become true.  When the waitq is triggered all waiting process will get
     820                 :            :  * unblocked and the condition will be check again.  Waitqs should be triggered
     821                 :            :  * every time a condition can potentially change.*/
     822                 :            : struct dwc_waitq;
     823                 :            : 
     824                 :            : /** Type for a waitq */
     825                 :            : typedef struct dwc_waitq dwc_waitq_t;
     826                 :            : 
     827                 :            : /** The type of waitq condition callback function.  This is called every time
     828                 :            :  * condition is evaluated. */
     829                 :            : typedef int (*dwc_waitq_condition_t)(void *data);
     830                 :            : 
     831                 :            : /** Allocate a waitq */
     832                 :            : extern dwc_waitq_t *DWC_WAITQ_ALLOC(void);
     833                 :            : #define dwc_waitq_alloc(_ctx_) DWC_WAITQ_ALLOC()
     834                 :            : 
     835                 :            : /** Free a waitq */
     836                 :            : extern void DWC_WAITQ_FREE(dwc_waitq_t *wq);
     837                 :            : #define dwc_waitq_free DWC_WAITQ_FREE
     838                 :            : 
     839                 :            : /** Check the condition and if it is false, block on the waitq.  When unblocked, check the
     840                 :            :  * condition again.  The function returns when the condition becomes true.  The return value
     841                 :            :  * is 0 on condition true, DWC_WAITQ_ABORTED on abort or killed, or DWC_WAITQ_UNKNOWN on error. */
     842                 :            : extern int32_t DWC_WAITQ_WAIT(dwc_waitq_t *wq, dwc_waitq_condition_t cond, void *data);
     843                 :            : #define dwc_waitq_wait DWC_WAITQ_WAIT
     844                 :            : 
     845                 :            : /** Check the condition and if it is false, block on the waitq.  When unblocked,
     846                 :            :  * check the condition again.  The function returns when the condition become
     847                 :            :  * true or the timeout has passed.  The return value is 0 on condition true or
     848                 :            :  * DWC_TIMED_OUT on timeout, or DWC_WAITQ_ABORTED, or DWC_WAITQ_UNKNOWN on
     849                 :            :  * error. */
     850                 :            : extern int32_t DWC_WAITQ_WAIT_TIMEOUT(dwc_waitq_t *wq, dwc_waitq_condition_t cond,
     851                 :            :                                       void *data, int32_t msecs);
     852                 :            : #define dwc_waitq_wait_timeout DWC_WAITQ_WAIT_TIMEOUT
     853                 :            : 
     854                 :            : /** Trigger a waitq, unblocking all processes.  This should be called whenever a condition
     855                 :            :  * has potentially changed. */
     856                 :            : extern void DWC_WAITQ_TRIGGER(dwc_waitq_t *wq);
     857                 :            : #define dwc_waitq_trigger DWC_WAITQ_TRIGGER
     858                 :            : 
     859                 :            : /** Unblock all processes waiting on the waitq with an ABORTED result. */
     860                 :            : extern void DWC_WAITQ_ABORT(dwc_waitq_t *wq);
     861                 :            : #define dwc_waitq_abort DWC_WAITQ_ABORT
     862                 :            : 
     863                 :            : 
     864                 :            : /** @name Threads
     865                 :            :  *
     866                 :            :  * A thread must be explicitly stopped.  It must check DWC_THREAD_SHOULD_STOP
     867                 :            :  * whenever it is woken up, and then return.  The DWC_THREAD_STOP function
     868                 :            :  * returns the value from the thread.
     869                 :            :  */
     870                 :            : 
     871                 :            : struct dwc_thread;
     872                 :            : 
     873                 :            : /** Type for a thread */
     874                 :            : typedef struct dwc_thread dwc_thread_t;
     875                 :            : 
     876                 :            : /** The thread function */
     877                 :            : typedef int (*dwc_thread_function_t)(void *data);
     878                 :            : 
     879                 :            : /** Create a thread and start it running the thread_function.  Returns a handle
     880                 :            :  * to the thread */
     881                 :            : extern dwc_thread_t *DWC_THREAD_RUN(dwc_thread_function_t func, char *name, void *data);
     882                 :            : #define dwc_thread_run(_ctx_,_func_,_name_,_data_) DWC_THREAD_RUN(_func_, _name_, _data_)
     883                 :            : 
     884                 :            : /** Stops a thread.  Return the value returned by the thread.  Or will return
     885                 :            :  * DWC_ABORT if the thread never started. */
     886                 :            : extern int DWC_THREAD_STOP(dwc_thread_t *thread);
     887                 :            : #define dwc_thread_stop DWC_THREAD_STOP
     888                 :            : 
     889                 :            : /** Signifies to the thread that it must stop. */
     890                 :            : #ifdef DWC_LINUX
     891                 :            : /* Linux doesn't need any parameters for kthread_should_stop() */
     892                 :            : extern dwc_bool_t DWC_THREAD_SHOULD_STOP(void);
     893                 :            : #define dwc_thread_should_stop(_thrd_) DWC_THREAD_SHOULD_STOP()
     894                 :            : 
     895                 :            : /* No thread_exit function in Linux */
     896                 :            : #define dwc_thread_exit(_thrd_)
     897                 :            : #endif
     898                 :            : 
     899                 :            : #if defined(DWC_FREEBSD) || defined(DWC_NETBSD)
     900                 :            : /** BSD needs the thread pointer for kthread_suspend_check() */
     901                 :            : extern dwc_bool_t DWC_THREAD_SHOULD_STOP(dwc_thread_t *thread);
     902                 :            : #define dwc_thread_should_stop DWC_THREAD_SHOULD_STOP
     903                 :            : 
     904                 :            : /** The thread must call this to exit. */
     905                 :            : extern void DWC_THREAD_EXIT(dwc_thread_t *thread);
     906                 :            : #define dwc_thread_exit DWC_THREAD_EXIT
     907                 :            : #endif
     908                 :            : 
     909                 :            : 
     910                 :            : /** @name Work queues
     911                 :            :  *
     912                 :            :  * Workqs are used to queue a callback function to be called at some later time,
     913                 :            :  * in another thread. */
     914                 :            : struct dwc_workq;
     915                 :            : 
     916                 :            : /** Type for a workq */
     917                 :            : typedef struct dwc_workq dwc_workq_t;
     918                 :            : 
     919                 :            : /** The type of the callback function to be called. */
     920                 :            : typedef void (*dwc_work_callback_t)(void *data);
     921                 :            : 
     922                 :            : /** Allocate a workq */
     923                 :            : extern dwc_workq_t *DWC_WORKQ_ALLOC(char *name);
     924                 :            : #define dwc_workq_alloc(_ctx_,_name_) DWC_WORKQ_ALLOC(_name_)
     925                 :            : 
     926                 :            : /** Free a workq.  All work must be completed before being freed. */
     927                 :            : extern void DWC_WORKQ_FREE(dwc_workq_t *workq);
     928                 :            : #define dwc_workq_free DWC_WORKQ_FREE
     929                 :            : 
     930                 :            : /** Schedule a callback on the workq, passing in data.  The function will be
     931                 :            :  * scheduled at some later time. */
     932                 :            : extern void DWC_WORKQ_SCHEDULE(dwc_workq_t *workq, dwc_work_callback_t cb,
     933                 :            :                                void *data, char *format, ...)
     934                 :            : #ifdef __GNUC__
     935                 :            :         __attribute__ ((format(printf, 4, 5)));
     936                 :            : #else
     937                 :            :         ;
     938                 :            : #endif
     939                 :            : #define dwc_workq_schedule DWC_WORKQ_SCHEDULE
     940                 :            : 
     941                 :            : /** Schedule a callback on the workq, that will be called until at least
     942                 :            :  * given number miliseconds have passed. */
     943                 :            : extern void DWC_WORKQ_SCHEDULE_DELAYED(dwc_workq_t *workq, dwc_work_callback_t cb,
     944                 :            :                                        void *data, uint32_t time, char *format, ...)
     945                 :            : #ifdef __GNUC__
     946                 :            :         __attribute__ ((format(printf, 5, 6)));
     947                 :            : #else
     948                 :            :         ;
     949                 :            : #endif
     950                 :            : #define dwc_workq_schedule_delayed DWC_WORKQ_SCHEDULE_DELAYED
     951                 :            : 
     952                 :            : /** The number of processes in the workq */
     953                 :            : extern int DWC_WORKQ_PENDING(dwc_workq_t *workq);
     954                 :            : #define dwc_workq_pending DWC_WORKQ_PENDING
     955                 :            : 
     956                 :            : /** Blocks until all the work in the workq is complete or timed out.  Returns <
     957                 :            :  * 0 on timeout. */
     958                 :            : extern int DWC_WORKQ_WAIT_WORK_DONE(dwc_workq_t *workq, int timeout);
     959                 :            : #define dwc_workq_wait_work_done DWC_WORKQ_WAIT_WORK_DONE
     960                 :            : 
     961                 :            : 
     962                 :            : /** @name Tasklets
     963                 :            :  *
     964                 :            :  */
     965                 :            : struct dwc_tasklet;
     966                 :            : 
     967                 :            : /** Type for a tasklet */
     968                 :            : typedef struct dwc_tasklet dwc_tasklet_t;
     969                 :            : 
     970                 :            : /** The type of the callback function to be called */
     971                 :            : typedef void (*dwc_tasklet_callback_t)(void *data);
     972                 :            : 
     973                 :            : /** Allocates a tasklet */
     974                 :            : extern dwc_tasklet_t *DWC_TASK_ALLOC(char *name, dwc_tasklet_callback_t cb, void *data);
     975                 :            : #define dwc_task_alloc(_ctx_,_name_,_cb_,_data_) DWC_TASK_ALLOC(_name_, _cb_, _data_)
     976                 :            : 
     977                 :            : /** Frees a tasklet */
     978                 :            : extern void DWC_TASK_FREE(dwc_tasklet_t *task);
     979                 :            : #define dwc_task_free DWC_TASK_FREE
     980                 :            : 
     981                 :            : /** Schedules a tasklet to run */
     982                 :            : extern void DWC_TASK_SCHEDULE(dwc_tasklet_t *task);
     983                 :            : #define dwc_task_schedule DWC_TASK_SCHEDULE
     984                 :            : 
     985                 :            : extern void DWC_TASK_HI_SCHEDULE(dwc_tasklet_t *task);
     986                 :            : #define dwc_task_hi_schedule DWC_TASK_HI_SCHEDULE
     987                 :            : 
     988                 :            : /** @name Timer
     989                 :            :  *
     990                 :            :  * Callbacks must be small and atomic.
     991                 :            :  */
     992                 :            : struct dwc_timer;
     993                 :            : 
     994                 :            : /** Type for a timer */
     995                 :            : typedef struct dwc_timer dwc_timer_t;
     996                 :            : 
     997                 :            : /** The type of the callback function to be called */
     998                 :            : typedef void (*dwc_timer_callback_t)(void *data);
     999                 :            : 
    1000                 :            : /** Allocates a timer */
    1001                 :            : extern dwc_timer_t *DWC_TIMER_ALLOC(char *name, dwc_timer_callback_t cb, void *data);
    1002                 :            : #define dwc_timer_alloc(_ctx_,_name_,_cb_,_data_) DWC_TIMER_ALLOC(_name_,_cb_,_data_)
    1003                 :            : 
    1004                 :            : /** Frees a timer */
    1005                 :            : extern void DWC_TIMER_FREE(dwc_timer_t *timer);
    1006                 :            : #define dwc_timer_free DWC_TIMER_FREE
    1007                 :            : 
    1008                 :            : /** Schedules the timer to run at time ms from now.  And will repeat at every
    1009                 :            :  * repeat_interval msec therafter
    1010                 :            :  *
    1011                 :            :  * Modifies a timer that is still awaiting execution to a new expiration time.
    1012                 :            :  * The mod_time is added to the old time.  */
    1013                 :            : extern void DWC_TIMER_SCHEDULE(dwc_timer_t *timer, uint32_t time);
    1014                 :            : #define dwc_timer_schedule DWC_TIMER_SCHEDULE
    1015                 :            : 
    1016                 :            : /** Disables the timer from execution. */
    1017                 :            : extern void DWC_TIMER_CANCEL(dwc_timer_t *timer);
    1018                 :            : #define dwc_timer_cancel DWC_TIMER_CANCEL
    1019                 :            : 
    1020                 :            : 
    1021                 :            : /** @name Spinlocks
    1022                 :            :  *
    1023                 :            :  * These locks are used when the work between the lock/unlock is atomic and
    1024                 :            :  * short.  Interrupts are also disabled during the lock/unlock and thus they are
    1025                 :            :  * suitable to lock between interrupt/non-interrupt context.  They also lock
    1026                 :            :  * between processes if you have multiple CPUs or Preemption.  If you don't have
    1027                 :            :  * multiple CPUS or Preemption, then the you can simply implement the
    1028                 :            :  * DWC_SPINLOCK and DWC_SPINUNLOCK to disable and enable interrupts.  Because
    1029                 :            :  * the work between the lock/unlock is atomic, the process context will never
    1030                 :            :  * change, and so you never have to lock between processes.  */
    1031                 :            : 
    1032                 :            : struct dwc_spinlock;
    1033                 :            : 
    1034                 :            : /** Type for a spinlock */
    1035                 :            : typedef struct dwc_spinlock dwc_spinlock_t;
    1036                 :            : 
    1037                 :            : /** Type for the 'flags' argument to spinlock funtions */
    1038                 :            : typedef unsigned long dwc_irqflags_t;
    1039                 :            : 
    1040                 :            : /** Returns an initialized lock variable.  This function should allocate and
    1041                 :            :  * initialize the OS-specific data structure used for locking.  This data
    1042                 :            :  * structure is to be used for the DWC_LOCK and DWC_UNLOCK functions and should
    1043                 :            :  * be freed by the DWC_FREE_LOCK when it is no longer used.
    1044                 :            :  *
    1045                 :            :  * For Linux Spinlock Debugging make it macro because the debugging routines use
    1046                 :            :  * the symbol name to determine recursive locking. Using a wrapper function
    1047                 :            :  * makes it falsely think recursive locking occurs. */
    1048                 :            : #if defined(DWC_LINUX) && defined(CONFIG_DEBUG_SPINLOCK)
    1049                 :            : #define DWC_SPINLOCK_ALLOC_LINUX_DEBUG(lock) ({ \
    1050                 :            :         lock = DWC_ALLOC(sizeof(spinlock_t)); \
    1051                 :            :         if (lock) { \
    1052                 :            :                 spin_lock_init((spinlock_t *)lock); \
    1053                 :            :         } \
    1054                 :            : })
    1055                 :            : #else
    1056                 :            : extern dwc_spinlock_t *DWC_SPINLOCK_ALLOC(void);
    1057                 :            : #define dwc_spinlock_alloc(_ctx_) DWC_SPINLOCK_ALLOC()
    1058                 :            : #endif
    1059                 :            : 
    1060                 :            : /** Frees an initialized lock variable. */
    1061                 :            : extern void DWC_SPINLOCK_FREE(dwc_spinlock_t *lock);
    1062                 :            : #define dwc_spinlock_free(_ctx_,_lock_) DWC_SPINLOCK_FREE(_lock_)
    1063                 :            : 
    1064                 :            : /** Disables interrupts and blocks until it acquires the lock.
    1065                 :            :  *
    1066                 :            :  * @param lock Pointer to the spinlock.
    1067                 :            :  * @param flags Unsigned long for irq flags storage.
    1068                 :            :  */
    1069                 :            : extern void DWC_SPINLOCK_IRQSAVE(dwc_spinlock_t *lock, dwc_irqflags_t *flags);
    1070                 :            : #define dwc_spinlock_irqsave DWC_SPINLOCK_IRQSAVE
    1071                 :            : 
    1072                 :            : /** Re-enables the interrupt and releases the lock.
    1073                 :            :  *
    1074                 :            :  * @param lock Pointer to the spinlock.
    1075                 :            :  * @param flags Unsigned long for irq flags storage.  Must be the same as was
    1076                 :            :  * passed into DWC_LOCK.
    1077                 :            :  */
    1078                 :            : extern void DWC_SPINUNLOCK_IRQRESTORE(dwc_spinlock_t *lock, dwc_irqflags_t flags);
    1079                 :            : #define dwc_spinunlock_irqrestore DWC_SPINUNLOCK_IRQRESTORE
    1080                 :            : 
    1081                 :            : /** Blocks until it acquires the lock.
    1082                 :            :  *
    1083                 :            :  * @param lock Pointer to the spinlock.
    1084                 :            :  */
    1085                 :            : extern void DWC_SPINLOCK(dwc_spinlock_t *lock);
    1086                 :            : #define dwc_spinlock DWC_SPINLOCK
    1087                 :            : 
    1088                 :            : /** Releases the lock.
    1089                 :            :  *
    1090                 :            :  * @param lock Pointer to the spinlock.
    1091                 :            :  */
    1092                 :            : extern void DWC_SPINUNLOCK(dwc_spinlock_t *lock);
    1093                 :            : #define dwc_spinunlock DWC_SPINUNLOCK
    1094                 :            : 
    1095                 :            : 
    1096                 :            : /** @name Mutexes
    1097                 :            :  *
    1098                 :            :  * Unlike spinlocks Mutexes lock only between processes and the work between the
    1099                 :            :  * lock/unlock CAN block, therefore it CANNOT be called from interrupt context.
    1100                 :            :  */
    1101                 :            : 
    1102                 :            : struct dwc_mutex;
    1103                 :            : 
    1104                 :            : /** Type for a mutex */
    1105                 :            : typedef struct dwc_mutex dwc_mutex_t;
    1106                 :            : 
    1107                 :            : /* For Linux Mutex Debugging make it inline because the debugging routines use
    1108                 :            :  * the symbol to determine recursive locking.  This makes it falsely think
    1109                 :            :  * recursive locking occurs. */
    1110                 :            : #if defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES)
    1111                 :            : #define DWC_MUTEX_ALLOC_LINUX_DEBUG(__mutexp) ({ \
    1112                 :            :         __mutexp = (dwc_mutex_t *)DWC_ALLOC(sizeof(struct mutex)); \
    1113                 :            :         mutex_init((struct mutex *)__mutexp); \
    1114                 :            : })
    1115                 :            : #endif
    1116                 :            : 
    1117                 :            : /** Allocate a mutex */
    1118                 :            : extern dwc_mutex_t *DWC_MUTEX_ALLOC(void);
    1119                 :            : #define dwc_mutex_alloc(_ctx_) DWC_MUTEX_ALLOC()
    1120                 :            : 
    1121                 :            : /* For memory leak debugging when using Linux Mutex Debugging */
    1122                 :            : #if defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES)
    1123                 :            : #define DWC_MUTEX_FREE(__mutexp) do { \
    1124                 :            :         mutex_destroy((struct mutex *)__mutexp); \
    1125                 :            :         DWC_FREE(__mutexp); \
    1126                 :            : } while(0)
    1127                 :            : #else
    1128                 :            : /** Free a mutex */
    1129                 :            : extern void DWC_MUTEX_FREE(dwc_mutex_t *mutex);
    1130                 :            : #define dwc_mutex_free(_ctx_,_mutex_) DWC_MUTEX_FREE(_mutex_)
    1131                 :            : #endif
    1132                 :            : 
    1133                 :            : /** Lock a mutex */
    1134                 :            : extern void DWC_MUTEX_LOCK(dwc_mutex_t *mutex);
    1135                 :            : #define dwc_mutex_lock DWC_MUTEX_LOCK
    1136                 :            : 
    1137                 :            : /** Non-blocking lock returns 1 on successful lock. */
    1138                 :            : extern int DWC_MUTEX_TRYLOCK(dwc_mutex_t *mutex);
    1139                 :            : #define dwc_mutex_trylock DWC_MUTEX_TRYLOCK
    1140                 :            : 
    1141                 :            : /** Unlock a mutex */
    1142                 :            : extern void DWC_MUTEX_UNLOCK(dwc_mutex_t *mutex);
    1143                 :            : #define dwc_mutex_unlock DWC_MUTEX_UNLOCK
    1144                 :            : 
    1145                 :            : 
    1146                 :            : /** @name Time */
    1147                 :            : 
    1148                 :            : /** Microsecond delay.
    1149                 :            :  *
    1150                 :            :  * @param usecs  Microseconds to delay.
    1151                 :            :  */
    1152                 :            : extern void DWC_UDELAY(uint32_t usecs);
    1153                 :            : #define dwc_udelay DWC_UDELAY
    1154                 :            : 
    1155                 :            : /** Millisecond delay.
    1156                 :            :  *
    1157                 :            :  * @param msecs  Milliseconds to delay.
    1158                 :            :  */
    1159                 :            : extern void DWC_MDELAY(uint32_t msecs);
    1160                 :            : #define dwc_mdelay DWC_MDELAY
    1161                 :            : 
    1162                 :            : /** Non-busy waiting.
    1163                 :            :  * Sleeps for specified number of milliseconds.
    1164                 :            :  *
    1165                 :            :  * @param msecs Milliseconds to sleep.
    1166                 :            :  */
    1167                 :            : extern void DWC_MSLEEP(uint32_t msecs);
    1168                 :            : #define dwc_msleep DWC_MSLEEP
    1169                 :            : 
    1170                 :            : /**
    1171                 :            :  * Returns number of milliseconds since boot.
    1172                 :            :  */
    1173                 :            : extern uint32_t DWC_TIME(void);
    1174                 :            : #define dwc_time DWC_TIME
    1175                 :            : 
    1176                 :            : 
    1177                 :            : 
    1178                 :            : 
    1179                 :            : /* @mainpage DWC Portability and Common Library
    1180                 :            :  *
    1181                 :            :  * This is the documentation for the DWC Portability and Common Library.
    1182                 :            :  *
    1183                 :            :  * @section intro Introduction
    1184                 :            :  *
    1185                 :            :  * The DWC Portability library consists of wrapper calls and data structures to
    1186                 :            :  * all low-level functions which are typically provided by the OS.  The WUDEV
    1187                 :            :  * driver uses only these functions.  In order to port the WUDEV driver, only
    1188                 :            :  * the functions in this library need to be re-implemented, with the same
    1189                 :            :  * behavior as documented here.
    1190                 :            :  *
    1191                 :            :  * The Common library consists of higher level functions, which rely only on
    1192                 :            :  * calling the functions from the DWC Portability library.  These common
    1193                 :            :  * routines are shared across modules.  Some of the common libraries need to be
    1194                 :            :  * used directly by the driver programmer when porting WUDEV.  Such as the
    1195                 :            :  * parameter and notification libraries.
    1196                 :            :  *
    1197                 :            :  * @section low Portability Library OS Wrapper Functions
    1198                 :            :  *
    1199                 :            :  * Any function starting with DWC and in all CAPS is a low-level OS-wrapper that
    1200                 :            :  * needs to be implemented when porting, for example DWC_MUTEX_ALLOC().  All of
    1201                 :            :  * these functions are included in the dwc_os.h file.
    1202                 :            :  *
    1203                 :            :  * There are many functions here covering a wide array of OS services.  Please
    1204                 :            :  * see dwc_os.h for details, and implementation notes for each function.
    1205                 :            :  *
    1206                 :            :  * @section common Common Library Functions
    1207                 :            :  *
    1208                 :            :  * Any function starting with dwc and in all lowercase is a common library
    1209                 :            :  * routine.  These functions have a portable implementation and do not need to
    1210                 :            :  * be reimplemented when porting.  The common routines can be used by any
    1211                 :            :  * driver, and some must be used by the end user to control the drivers.  For
    1212                 :            :  * example, you must use the Parameter common library in order to set the
    1213                 :            :  * parameters in the WUDEV module.
    1214                 :            :  *
    1215                 :            :  * The common libraries consist of the following:
    1216                 :            :  *
    1217                 :            :  * - Connection Contexts - Used internally and can be used by end-user.  See dwc_cc.h
    1218                 :            :  * - Parameters - Used internally and can be used by end-user.  See dwc_params.h
    1219                 :            :  * - Notifications - Used internally and can be used by end-user.  See dwc_notifier.h
    1220                 :            :  * - Lists - Used internally and can be used by end-user.  See dwc_list.h
    1221                 :            :  * - Memory Debugging - Used internally and can be used by end-user.  See dwc_os.h
    1222                 :            :  * - Modpow - Used internally only.  See dwc_modpow.h
    1223                 :            :  * - DH - Used internally only.  See dwc_dh.h
    1224                 :            :  * - Crypto - Used internally only.  See dwc_crypto.h
    1225                 :            :  *
    1226                 :            :  *
    1227                 :            :  * @section prereq Prerequistes For dwc_os.h
    1228                 :            :  * @subsection types Data Types
    1229                 :            :  *
    1230                 :            :  * The dwc_os.h file assumes that several low-level data types are pre defined for the
    1231                 :            :  * compilation environment.  These data types are:
    1232                 :            :  *
    1233                 :            :  * - uint8_t - unsigned 8-bit data type
    1234                 :            :  * - int8_t - signed 8-bit data type
    1235                 :            :  * - uint16_t - unsigned 16-bit data type
    1236                 :            :  * - int16_t - signed 16-bit data type
    1237                 :            :  * - uint32_t - unsigned 32-bit data type
    1238                 :            :  * - int32_t - signed 32-bit data type
    1239                 :            :  * - uint64_t - unsigned 64-bit data type
    1240                 :            :  * - int64_t - signed 64-bit data type
    1241                 :            :  *
    1242                 :            :  * Ensure that these are defined before using dwc_os.h.  The easiest way to do
    1243                 :            :  * that is to modify the top of the file to include the appropriate header.
    1244                 :            :  * This is already done for the Linux environment.  If the DWC_LINUX macro is
    1245                 :            :  * defined, the correct header will be added.  A standard header <stdint.h> is
    1246                 :            :  * also used for environments where standard C headers are available.
    1247                 :            :  *
    1248                 :            :  * @subsection stdarg Variable Arguments
    1249                 :            :  *
    1250                 :            :  * Variable arguments are provided by a standard C header <stdarg.h>.  it is
    1251                 :            :  * available in Both the Linux and ANSI C enviornment.  An equivalent must be
    1252                 :            :  * provided in your enviornment in order to use dwc_os.h with the debug and
    1253                 :            :  * tracing message functionality.
    1254                 :            :  *
    1255                 :            :  * @subsection thread Threading
    1256                 :            :  *
    1257                 :            :  * WUDEV Core must be run on an operating system that provides for multiple
    1258                 :            :  * threads/processes.  Threading can be implemented in many ways, even in
    1259                 :            :  * embedded systems without an operating system.  At the bare minimum, the
    1260                 :            :  * system should be able to start any number of processes at any time to handle
    1261                 :            :  * special work.  It need not be a pre-emptive system.  Process context can
    1262                 :            :  * change upon a call to a blocking function.  The hardware interrupt context
    1263                 :            :  * that calls the module's ISR() function must be differentiable from process
    1264                 :            :  * context, even if your processes are impemented via a hardware interrupt.
    1265                 :            :  * Further locking mechanism between process must exist (or be implemented), and
    1266                 :            :  * process context must have a way to disable interrupts for a period of time to
    1267                 :            :  * lock them out.  If all of this exists, the functions in dwc_os.h related to
    1268                 :            :  * threading should be able to be implemented with the defined behavior.
    1269                 :            :  *
    1270                 :            :  */
    1271                 :            : 
    1272                 :            : #ifdef __cplusplus
    1273                 :            : }
    1274                 :            : #endif
    1275                 :            : 
    1276                 :            : #endif /* _DWC_OS_H_ */

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