1 /* =========================================================================
2 * $File: //dwh/usb_iip/dev/software/dwc_common_port/dwc_os.h $
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41 * DWC portability library, low level os-wrapper functions
45 /* These basic types need to be defined by some OS header file or custom header
46 * file for your specific target architecture.
48 * uint8_t, int8_t, uint16_t, int16_t, uint32_t, int32_t, uint64_t, int64_t
50 * Any custom or alternate header file must be added and enabled here.
54 # include <linux/types.h>
55 # ifdef CONFIG_DEBUG_MUTEXES
56 # include <linux/mutex.h>
63 /** @name Primitive Types and Values */
65 /** We define a boolean type for consistency. Can be either YES or NO */
66 typedef uint8_t dwc_bool_t;
70 /** @todo make them positive and return the negative error code */
71 /** @name Error Codes */
72 #define DWC_E_INVALID 1001
73 #define DWC_E_NO_MEMORY 1002
74 #define DWC_E_NO_DEVICE 1003
75 #define DWC_E_NOT_SUPPORTED 1004
76 #define DWC_E_TIMEOUT 1005
77 #define DWC_E_BUSY 1006
78 #define DWC_E_AGAIN 1007
79 #define DWC_E_RESTART 1008
80 #define DWC_E_ABORT 1009
81 #define DWC_E_SHUTDOWN 1010
82 #define DWC_E_NO_DATA 1011
83 #define DWC_E_DISCONNECT 2000
84 #define DWC_E_UNKNOWN 3000
85 #define DWC_E_NO_STREAM_RES 4001
86 #define DWC_E_COMMUNICATION 4002
87 #define DWC_E_OVERFLOW 4003
88 #define DWC_E_PROTOCOL 4004
89 #define DWC_E_IN_PROGRESS 4005
90 #define DWC_E_PIPE 4006
92 #define DWC_E_NO_SPACE 4008
94 /** @name Tracing/Logging Functions
96 * These function provide the capability to add tracing, debugging, and error
97 * messages, as well exceptions as assertions. The WUDEV uses these
98 * extensively. These could be logged to the main console, the serial port, an
99 * internal buffer, etc. These functions could also be no-op if they are too
100 * expensive on your system. By default undefining the DEBUG macro already
101 * no-ops some of these functions. */
104 /** Returns non-zero if in interrupt context. */
105 extern dwc_bool_t DWC_IN_IRQ(void);
106 #define dwc_in_irq DWC_IN_IRQ
108 /** Returns "IRQ" if DWC_IN_IRQ is true. */
109 static inline char *dwc_irq(void) {
110 return DWC_IN_IRQ() ? "IRQ" : "";
114 * A vprintf() clone. Just call vprintf if you've got it.
116 extern void DWC_VPRINTF(char *format, va_list args);
117 #define dwc_vprintf DWC_VPRINTF
120 * A vsnprintf() clone. Just call vprintf if you've got it.
122 extern int DWC_VSNPRINTF(char *str, int size, char *format, va_list args);
123 #define dwc_vsnprintf DWC_VSNPRINTF
126 * printf() clone. Just call printf if you've go it.
128 extern void DWC_PRINTF(char *format, ...)
129 /* This provides compiler level static checking of the parameters if you're
132 __attribute__ ((format(printf, 1, 2)));
136 #define dwc_printf DWC_PRINTF
139 * sprintf() clone. Just call sprintf if you've got it.
141 extern int DWC_SPRINTF(char *string, char *format, ...)
143 __attribute__ ((format(printf, 2, 3)));
147 #define dwc_sprintf DWC_SPRINTF
150 * snprintf() clone. Just call snprintf if you've got it.
152 extern int DWC_SNPRINTF(char *string, int size, char *format, ...)
154 __attribute__ ((format(printf, 3, 4)));
158 #define dwc_snprintf DWC_SNPRINTF
161 * Prints a WARNING message. On systems that don't differentiate between
162 * warnings and regular log messages, just print it. Indicates that something
163 * may be wrong with the driver. Works like printf().
165 * Use the DWC_WARN macro to call this function.
167 extern void __DWC_WARN(char *format, ...)
169 __attribute__ ((format(printf, 1, 2)));
175 * Prints an error message. On systems that don't differentiate between errors
176 * and regular log messages, just print it. Indicates that something went wrong
177 * with the driver, but it can be recovered from. Works like printf().
179 * Use the DWC_ERROR macro to call this function.
181 extern void __DWC_ERROR(char *format, ...)
183 __attribute__ ((format(printf, 1, 2)));
189 * Prints an exception error message and takes some user-defined action such as
190 * print out a backtrace or trigger a breakpoint. Indicates that something went
191 * abnormally wrong with the driver such as programmer error, or other
192 * exceptional condition. It should not be ignored so even on systems without
193 * printing capability, some action should be taken to notify the developer of
194 * it. Works like printf().
196 extern void DWC_EXCEPTION(char *format, ...)
198 __attribute__ ((format(printf, 1, 2)));
202 #define dwc_exception DWC_EXCEPTION
206 * Prints out a debug message. Used for logging/trace messages.
208 * Use the DWC_DEBUG macro to call this function
210 extern void __DWC_DEBUG(char *format, ...)
212 __attribute__ ((format(printf, 1, 2)));
217 #define __DWC_DEBUG(...)
222 * Prints out a Debug message.
224 #define DWC_DEBUG(_format, _args...) __DWC_DEBUG("DEBUG:%s:%s: " _format "\n", __func__, dwc_irq(), ## _args)
225 #define dwc_debug DWC_DEBUG
227 * Prints out an informative message.
229 #define DWC_INFO(_format, _args...) DWC_PRINTF("INFO:%s: " _format "\n", dwc_irq(), ## _args)
230 #define dwc_info DWC_INFO
232 * Prints out a warning message.
234 #define DWC_WARN(_format, _args...) __DWC_WARN("WARN:%s:%s:%d: " _format "\n", dwc_irq(), __func__, __LINE__, ## _args)
235 #define dwc_warn DWC_WARN
237 * Prints out an error message.
239 #define DWC_ERROR(_format, _args...) __DWC_ERROR("ERROR:%s:%s:%d: " _format "\n", dwc_irq(), __func__, __LINE__, ## _args)
240 #define dwc_error DWC_ERROR
242 #define DWC_PROTO_ERROR(_format, _args...) __DWC_WARN("ERROR:%s:%s:%d: " _format "\n", dwc_irq(), __func__, __LINE__, ## _args)
243 #define dwc_proto_error DWC_PROTO_ERROR
246 /** Prints out a exception error message if the _expr expression fails. Disabled
247 * if DEBUG is not enabled. */
248 #define DWC_ASSERT(_expr, _format, _args...) if (!(_expr)) { DWC_EXCEPTION("%s:%s:%d: " _format "\n", dwc_irq(), __FILE__, __LINE__, ## _args); }
250 #define DWC_ASSERT(_x...)
252 #define dwc_assert DWC_ASSERT
254 /** @name Byter Ordering
255 * The following functions are for conversions between processor's byte ordering
256 * and specific ordering you want.
259 /** Converts 32 bit data in CPU byte ordering to little endian. */
260 extern uint32_t DWC_CPU_TO_LE32(uint32_t *p);
261 #define dwc_cpu_to_le32 DWC_CPU_TO_LE32
262 /** Converts 32 bit data in CPU byte orderint to big endian. */
263 extern uint32_t DWC_CPU_TO_BE32(uint32_t *p);
264 #define dwc_cpu_to_be32 DWC_CPU_TO_BE32
266 /** Converts 32 bit little endian data to CPU byte ordering. */
267 extern uint32_t DWC_LE32_TO_CPU(uint32_t *p);
268 #define dwc_le32_to_cpu DWC_LE32_TO_CPU
269 /** Converts 32 bit big endian data to CPU byte ordering. */
270 extern uint32_t DWC_BE32_TO_CPU(uint32_t *p);
271 #define dwc_be32_to_cpu DWC_BE32_TO_CPU
273 /** Converts 16 bit data in CPU byte ordering to little endian. */
274 extern uint16_t DWC_CPU_TO_LE16(uint16_t *p);
275 #define dwc_cpu_to_le16 DWC_CPU_TO_LE16
276 /** Converts 16 bit data in CPU byte orderint to big endian. */
277 extern uint16_t DWC_CPU_TO_BE16(uint16_t *p);
278 #define dwc_cpu_to_be16 DWC_CPU_TO_BE16
280 /** Converts 16 bit little endian data to CPU byte ordering. */
281 extern uint16_t DWC_LE16_TO_CPU(uint16_t *p);
282 #define dwc_le16_to_cpu DWC_LE16_TO_CPU
283 /** Converts 16 bit bi endian data to CPU byte ordering. */
284 extern uint16_t DWC_BE16_TO_CPU(uint16_t *p);
285 #define dwc_be16_to_cpu DWC_BE16_TO_CPU
287 /** @name Register Read/Write
289 * The following five functions should be implemented to read/write registers of
290 * 32-bit and 64-bit sizes. All modules use this to read/write register values.
291 * The reg value is a pointer to the register calculated from the void *base
292 * variable passed into the driver when it is started. */
294 /** Reads the content of a 32-bit register. */
295 extern uint32_t DWC_READ_REG32(uint32_t volatile *reg);
296 #define dwc_read_reg32 DWC_READ_REG32
297 /** Reads the content of a 64-bit register. */
298 extern uint64_t DWC_READ_REG64(uint64_t volatile *reg);
299 #define dwc_read_reg64 DWC_READ_REG64
300 /** Writes to a 32-bit register. */
301 extern void DWC_WRITE_REG32(uint32_t volatile *reg, uint32_t value);
302 #define dwc_write_reg32 DWC_WRITE_REG32
303 /** Writes to a 64-bit register. */
304 extern void DWC_WRITE_REG64(uint64_t volatile *reg, uint64_t value);
305 #define dwc_write_reg64 DWC_WRITE_REG64
307 * Modify bit values in a register. Using the
308 * algorithm: (reg_contents & ~clear_mask) | set_mask.
310 extern void DWC_MODIFY_REG32(uint32_t volatile *reg, uint32_t clear_mask, uint32_t set_mask);
311 #define dwc_modify_reg32 DWC_MODIFY_REG32
315 /** @name Some convenience MACROS used internally. Define DEBUG_REGS to log the
316 * register writes. */
320 #define dwc_define_read_write_reg_n(_reg,_container_type) \
321 static inline uint32_t dwc_read_##_reg##_n(_container_type *container, int num) { \
322 return DWC_READ_REG32(&container->regs->_reg[num]); \
324 static inline void dwc_write_##_reg##_n(_container_type *container, int num, uint32_t data) { \
325 DWC_DEBUG("WRITING %8s[%d]: %p: %08x", #_reg, num, &(((uint32_t*)container->regs->_reg)[num]), data); \
326 DWC_WRITE_REG32(&(((uint32_t*)container->regs->_reg)[num]), data); \
329 #define dwc_define_read_write_reg(_reg,_container_type) \
330 static inline uint32_t dwc_read_##_reg(_container_type *container) { \
331 return DWC_READ_REG32(&container->regs->_reg); \
333 static inline void dwc_write_##_reg(_container_type *container, uint32_t data) { \
334 DWC_DEBUG("WRITING %11s: %p: %08x", #_reg, &container->regs->_reg, data); \
335 DWC_WRITE_REG32(&container->regs->_reg, data); \
340 #define dwc_define_read_write_reg_n(_reg,_container_type) \
341 static inline uint32_t dwc_read_##_reg##_n(_container_type *container, int num) { \
342 return DWC_READ_REG32(&container->regs->_reg[num]); \
344 static inline void dwc_write_##_reg##_n(_container_type *container, int num, uint32_t data) { \
345 DWC_WRITE_REG32(&(((uint32_t*)container->regs->_reg)[num]), data); \
348 #define dwc_define_read_write_reg(_reg,_container_type) \
349 static inline uint32_t dwc_read_##_reg(_container_type *container) { \
350 return DWC_READ_REG32(&container->regs->_reg); \
352 static inline void dwc_write_##_reg(_container_type *container, uint32_t data) { \
353 DWC_WRITE_REG32(&container->regs->_reg, data); \
361 /** @name Crypto Functions
363 * These are the low-level cryptographic functions used by the driver. */
365 /** Perform AES CBC */
366 extern int DWC_AES_CBC(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t iv[16], uint8_t *out);
367 #define dwc_aes_cbc DWC_AES_CBC
368 /** Fill the provided buffer with random bytes. These should be cryptographic grade random numbers. */
369 extern void DWC_RANDOM_BYTES(uint8_t *buffer, uint32_t length);
370 #define dwc_random_bytes DWC_RANDOM_BYTES
371 /** Perform the SHA-256 hash function */
372 extern int DWC_SHA256(uint8_t *message, uint32_t len, uint8_t *out);
373 #define dwc_sha256 DWC_SHA256
374 /** Calculated the HMAC-SHA256 */
375 extern int DWC_HMAC_SHA256(uint8_t *message, uint32_t messagelen, uint8_t *key, uint32_t keylen, uint8_t *out);
376 #define dwc_hmac_sha256 DWC_HMAC_SHA256
379 /** @name Memory Allocation
381 * These function provide access to memory allocation. There are only 2 DMA
382 * functions and 3 Regular memory functions that need to be implemented. None
383 * of the memory debugging routines need to be implemented. The allocation
384 * routines all ZERO the contents of the memory.
386 * Defining DEBUG_MEMORY turns on memory debugging and statistic gathering.
387 * This checks for memory leaks, keeping track of alloc/free pairs. It also
388 * keeps track of how much memory the driver is using at any given time. */
390 #define DWC_PAGE_SIZE 4096
391 #define DWC_PAGE_OFFSET(addr) (((uint32_t)addr) & 0xfff)
392 #define DWC_PAGE_ALIGNED(addr) ((((uint32_t)addr) & 0xfff) == 0)
394 #define DWC_INVALID_DMA_ADDR 0x0
396 typedef uint32_t dwc_dma_t;
399 /** Allocates a DMA capable buffer and zeroes its contents. */
400 extern void *__DWC_DMA_ALLOC(uint32_t size, dwc_dma_t *dma_addr);
402 /** Frees a previosly allocated buffer. */
403 extern void __DWC_DMA_FREE(uint32_t size, void *virt_addr, dwc_dma_t dma_addr);
405 /** Allocates a block of memory and zeroes its contents. */
406 extern void *__DWC_ALLOC(uint32_t size);
408 /** Allocates a block of memory and zeroes its contents, in an atomic manner
409 * which can be used inside interrupt context. The size should be sufficiently
410 * small, a few KB at most, such that failures are not likely to occur. Can just call
411 * __DWC_ALLOC if it is atomic. */
412 extern void *__DWC_ALLOC_ATOMIC(uint32_t size);
414 /** Frees a previously allocated buffer. */
415 extern void __DWC_FREE(void *addr);
419 #define DWC_ALLOC(_size_) __DWC_ALLOC(_size_)
420 #define DWC_ALLOC_ATOMIC(_size_) __DWC_ALLOC_ATOMIC(_size_)
421 #define DWC_FREE(_addr_) __DWC_FREE(_addr_)
422 #define DWC_DMA_ALLOC(_size_,_dma_) __DWC_DMA_ALLOC(_size_,_dma_)
423 #define DWC_DMA_FREE(_size_,_virt_,_dma_) __DWC_DMA_FREE(_size_,_virt_,_dma_)
427 extern void *dwc_alloc_debug(uint32_t size, char const *func, int line);
428 extern void *dwc_alloc_atomic_debug(uint32_t size, char const *func, int line);
429 extern void dwc_free_debug(void *addr, char const *func, int line);
430 extern void *dwc_dma_alloc_debug(uint32_t size, dwc_dma_t *dma_addr, char const *func, int line);
431 extern void dwc_dma_free_debug(uint32_t size, void *virt_addr, dwc_dma_t dma_addr, char const *func, int line);
433 extern void dwc_memory_debug_start(void);
434 extern void dwc_memory_debug_stop(void);
435 extern void dwc_memory_debug_report(void);
437 #define DWC_ALLOC(_size_) (dwc_alloc_debug(_size_, __func__, __LINE__))
438 #define DWC_ALLOC_ATOMIC(_size_) (dwc_alloc_atomic_debug(_size_, __func__, __LINE__))
439 #define DWC_FREE(_addr_) (dwc_free_debug(_addr_, __func__, __LINE__))
440 #define DWC_DMA_ALLOC(_size_,_dma_) dwc_dma_alloc_debug(_size_, _dma_, __func__, __LINE__)
441 #define DWC_DMA_FREE(_size_,_virt_,_dma_) dwc_dma_free_debug(_size_, _virt_, _dma_, __func__, __LINE__)
443 #endif /* DEBUG_MEMORY */
445 #define dwc_alloc DWC_ALLOC
446 #define dwc_alloc_atomic DWC_ALLOC_ATOMIC
447 #define dwc_free DWC_FREE
448 #define dwc_dma_alloc DWC_DMA_ALLOC
449 #define dwc_dma_free DWC_DMA_FREE
452 /** @name Memory and String Processing */
454 /** memset() clone */
455 extern void *DWC_MEMSET(void *dest, uint8_t byte, uint32_t size);
456 #define dwc_memset DWC_MEMSET
457 /** memcpy() clone */
458 extern void *DWC_MEMCPY(void *dest, void const *src, uint32_t size);
459 #define dwc_memcpy DWC_MEMCPY
460 /** memmove() clone */
461 extern void *DWC_MEMMOVE(void *dest, void *src, uint32_t size);
462 #define dwc_memmove DWC_MEMMOVE
463 /** memcmp() clone */
464 extern int DWC_MEMCMP(void *m1, void *m2, uint32_t size);
465 #define dwc_memcmp DWC_MEMCMP
466 /** strcmp() clone */
467 extern int DWC_STRCMP(void *s1, void *s2);
468 #define dwc_strcmp DWC_STRCMP
469 /** strncmp() clone */
470 extern int DWC_STRNCMP(void *s1, void *s2, uint32_t size);
471 #define dwc_strncmp DWC_STRNCMP
472 /** strlen() clone, for NULL terminated ASCII strings */
473 extern int DWC_STRLEN(char const *str);
474 #define dwc_strlen DWC_STRLEN
475 /** strcpy() clone, for NULL terminated ASCII strings */
476 extern char *DWC_STRCPY(char *to, const char *from);
477 #define dwc_strcpy DWC_STRCPY
479 /** strdup() clone. If you wish to use memory allocation debugging, this
480 * implementation of strdup should use the DWC_* memory routines instead of
481 * calling a predefined strdup. Otherwise the memory allocated by this routine
482 * will not be seen by the debugging routines. */
483 extern char *DWC_STRDUP(char const *str);
484 #define dwc_strdup DWC_STRDUP
486 /** NOT an atoi() clone. Read the description carefully. Returns an integer
487 * converted from the string str in base 10 unless the string begins with a "0x"
488 * in which case it is base 16. String must be a NULL terminated sequence of
489 * ASCII characters and may optionally begin with whitespace, a + or -, and a
490 * "0x" prefix if base 16. The remaining characters must be valid digits for
491 * the number and end with a NULL character. If any invalid characters are
492 * encountered or it returns with a negative error code and the results of the
493 * conversion are undefined. On sucess it returns 0. Overflow conditions are
494 * undefined. An example implementation using atoi() can be referenced from the
495 * Linux implementation. */
496 extern int DWC_ATOI(char *str, int32_t *value);
497 #define dwc_atoi DWC_ATOI
498 /** Same as above but for unsigned. */
499 extern int DWC_ATOUI(char *str, uint32_t *value);
500 #define dwc_atoui DWC_ATOUI
501 /** This routine returns a UTF16LE unicode encoded string from a UTF8 string. */
502 extern int DWC_UTF8_TO_UTF16LE(uint8_t const *utf8string, uint16_t *utf16string, unsigned len);
503 #define dwc_utf8_to_utf16le DWC_UTF8_TO_UTF16LE
505 /** @name Wait queues
507 * Wait queues provide a means of synchronizing between threads or processes. A
508 * process can block on a waitq if some condition is not true, waiting for it to
509 * become true. When the waitq is triggered all waiting process will get
510 * unblocked and the condition will be check again. Waitqs should be triggered
511 * every time a condition can potentially change.*/
513 typedef struct dwc_waitq dwc_waitq_t;
515 /** The type of waitq condition callback function. This is called every time
516 * condition is evaluated. */
517 typedef int (*dwc_waitq_condition_t)(void *data);
519 /** Allocate a waitq */
520 extern dwc_waitq_t *DWC_WAITQ_ALLOC(void);
521 #define dwc_waitq_alloc DWC_WAITQ_ALLOC
523 extern void DWC_WAITQ_FREE(dwc_waitq_t *wq);
524 #define dwc_waitq_free DWC_WAITQ_FREE
526 /** Check the condition and if it is false, block on the waitq. When unblocked, check the
527 * condition again. The function returns when the condition becomes true. The return value
528 * is 0 on condition true, DWC_WAITQ_ABORTED on abort or killed, or DWC_WAITQ_UNKNOWN on error. */
529 extern int32_t DWC_WAITQ_WAIT(dwc_waitq_t *wq, dwc_waitq_condition_t condition, void *data);
530 #define dwc_waitq_wait DWC_WAITQ_WAIT;
531 /** Check the condition and if it is false, block on the waitq. When unblocked,
532 * check the condition again. The function returns when the condition become
533 * true or the timeout has passed. The return value is 0 on condition true or
534 * DWC_TIMED_OUT on timeout, or DWC_WAITQ_ABORTED, or DWC_WAITQ_UNKNOWN on
536 extern int32_t DWC_WAITQ_WAIT_TIMEOUT(dwc_waitq_t *wq, dwc_waitq_condition_t condition, void *data, int32_t msecs);
537 #define dwc_waitq_wait_timeout DWC_WAITQ_WAIT_TIMEOUT
538 /** Trigger a waitq, unblocking all processes. This should be called whenever a condition
539 * has potentially changed. */
540 extern void DWC_WAITQ_TRIGGER(dwc_waitq_t *wq);
541 #define dwc_waitq_trigger DWC_WAITQ_TRIGGER
542 /** Unblock all processes waiting on the waitq with an ABORTED result. */
543 extern void DWC_WAITQ_ABORT(dwc_waitq_t *wq);
544 #define dwc_waitq_abort DWC_WAITQ_ABORT
546 /** @name Work queues
548 * Workqs are used to queue a callback function to be called at some later time,
549 * in another thread. */
551 typedef struct dwc_workq dwc_workq_t;
553 /** The type of the callback function to be called. */
554 typedef void (*dwc_work_callback_t)(void *data);
556 /** Allocate a workq */
557 extern dwc_workq_t *DWC_WORKQ_ALLOC(char *name);
558 #define dwc_workq_alloc DWC_WORKQ_ALLOC
559 /** Free a workq. All work must be completed before being freed. */
560 extern void DWC_WORKQ_FREE(dwc_workq_t *workq);
561 #define dwc_workq_free DWC_WORKQ_FREE
562 /** Schedule a callback on the workq, passing in data. The function will be
563 * scheduled at some later time. */
564 extern void DWC_WORKQ_SCHEDULE(dwc_workq_t *workq, dwc_work_callback_t work_cb, void *data, char *format, ...)
566 __attribute__ ((format(printf, 4, 5)));
570 #define dwc_workq_schedule DWC_WORKQ_SCHEDULE
572 /** Schedule a callback on the workq, that will be called until at least
573 * given number miliseconds have passed. */
574 extern void DWC_WORKQ_SCHEDULE_DELAYED(dwc_workq_t *workq, dwc_work_callback_t work_cb, void *data, uint32_t time, char *format, ...)
576 __attribute__ ((format(printf, 5, 6)));
580 #define dwc_workq_schedule_delayed DWC_WORKQ_SCHEDULE_DELAYED
582 /** The number of processes in the workq */
583 extern int DWC_WORKQ_PENDING(dwc_workq_t *workq);
584 #define dwc_workq_pending DWC_WORKQ_PENDING
585 /** Blocks until all the work in the workq is complete or timed out. Returns <
587 extern int DWC_WORKQ_WAIT_WORK_DONE(dwc_workq_t *workq, int timeout);
588 #define dwc_workq_wait_work_done DWC_WORKQ_WAIT_WORK_DONE
594 typedef struct dwc_tasklet dwc_tasklet_t;
596 typedef void (*dwc_tasklet_callback_t)(void *data);
598 extern dwc_tasklet_t *DWC_TASK_ALLOC(dwc_tasklet_callback_t cb, void *data);
599 #define dwc_task_alloc DWC_TASK_ALLOC
600 extern void DWC_TASK_FREE(dwc_tasklet_t *t);
601 #define dwc_task_free DWC_TASK_FREE
602 extern void DWC_TASK_SCHEDULE(dwc_tasklet_t *task);
603 #define dwc_task_schedule DWC_TASK_SCHEDULE
607 * Callbacks must be small and atomic.
610 typedef struct dwc_timer dwc_timer_t;
612 typedef void (*dwc_timer_callback_t)(void *data);
614 extern dwc_timer_t *DWC_TIMER_ALLOC(char *name, dwc_timer_callback_t cb, void *data);
615 #define dwc_timer_alloc DWC_TIMER_ALLOC
616 extern void DWC_TIMER_FREE(dwc_timer_t *timer);
617 #define dwc_timer_free DWC_TIMER_FREE
619 /** Schedules the timer to run at time ms from now. And will repeat at every
620 * repeat_interval msec therafter
622 * Modifies a timer that is still awaiting execution to a new expiration time.
623 * The mod_time is added to the old time. */
624 extern void DWC_TIMER_SCHEDULE(dwc_timer_t *timer, uint32_t time);
625 #define dwc_timer_schedule DWC_TIMER_SCHEDULE
627 /** Disables the timer from execution. */
628 extern void DWC_TIMER_CANCEL(dwc_timer_t *timer);
629 #define dwc_timer_cancel DWC_TIMER_CANCEL
635 * These locks are used when the work between the lock/unlock is atomic and
636 * short. Interrupts are also disabled during the lock/unlock and thus they are
637 * suitable to lock between interrupt/non-interrupt context. They also lock
638 * between processes if you have multiple CPUs or Preemption. If you don't have
639 * multiple CPUS or Preemption, then the you can simply implement the
640 * DWC_SPINLOCK and DWC_SPINUNLOCK to disable and enable interrupts. Because
641 * the work between the lock/unlock is atomic, the process context will never
642 * change, and so you never have to lock between processes. */
645 typedef struct dwc_spinlock dwc_spinlock_t;
647 /** Returns an initialized lock variable. This function should allocate and
648 * initialize the OS-specific data structure used for locking. This data
649 * structure is to be used for the DWC_LOCK and DWC_UNLOCK functions and should
650 * be freed by the DWC_FREE_LOCK when it is no longer used. */
651 extern dwc_spinlock_t *DWC_SPINLOCK_ALLOC(void);
652 #define dwc_spinlock_alloc DWC_SPINLOCK_ALLOC
654 /** Frees an initialized lock variable. */
655 extern void DWC_SPINLOCK_FREE(dwc_spinlock_t *lock);
656 #define dwc_spinlock_free DWC_SPINLOCK_FREE
658 /** Disables interrupts and blocks until it acquires the lock.
660 * @param lock Pointer to the spinlock.
661 * @param flags Unsigned long for irq flags storage.
663 extern void DWC_SPINLOCK_IRQSAVE(dwc_spinlock_t *lock, unsigned long *flags);
664 #define dwc_spinlock_irqsave DWC_SPINLOCK_IRQSAVE
666 /** Re-enables the interrupt and releases the lock.
668 * @param lock Pointer to the spinlock.
669 * @param flags Unsigned long for irq flags storage. Must be the same as was
670 * passed into DWC_LOCK.
672 extern void DWC_SPINUNLOCK_IRQRESTORE(dwc_spinlock_t *lock, unsigned long flags);
673 #define dwc_spinunlock_irqrestore DWC_SPINUNLOCK_IRQRESTORE
675 /** Blocks until it acquires the lock.
677 * @param lock Pointer to the spinlock.
679 extern void DWC_SPINLOCK(dwc_spinlock_t *lock);
680 #define dwc_spinlock DWC_SPINLOCK
682 /** Releases the lock.
684 * @param lock Pointer to the spinlock.
686 extern void DWC_SPINUNLOCK(dwc_spinlock_t *lock);
687 #define dwc_spinunlock DWC_SPINUNLOCK
691 * Unlike spinlocks Mutexes lock only between processes and the work between the
692 * lock/unlock CAN block, therefore it CANNOT be called from interrupt context.
696 typedef struct dwc_mutex dwc_mutex_t;
699 /* For Linux Mutex Debugging make it inline because the debugging routines use
700 * the symbol to determine recursive locking. This makes it falsely think
701 * recursive locking occurs. */
702 #if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES))
703 #define DWC_MUTEX_ALLOC_LINUX_DEBUG(__mutexp) ({ \
704 __mutexp = (dwc_mutex_t *)DWC_ALLOC(sizeof(struct mutex)); \
705 mutex_init((struct mutex *)__mutexp); \
708 extern dwc_mutex_t *DWC_MUTEX_ALLOC(void);
709 #define dwc_mutex_alloc DWC_MUTEX_ALLOC
711 /* For memory leak debugging when using Linux Mutex Debugging */
712 #if (defined(DWC_LINUX) && defined(CONFIG_DEBUG_MUTEXES))
713 #define DWC_MUTEX_FREE(__mutexp) do { \
714 mutex_destroy((struct mutex *)__mutexp); \
715 DWC_FREE(__mutexp); \
718 extern void DWC_MUTEX_FREE(dwc_mutex_t *mutex);
719 #define dwc_mutex_free DWC_MUTEX_FREE
722 extern void DWC_MUTEX_LOCK(dwc_mutex_t *mutex);
723 #define dwc_mutex_lock DWC_MUTEX_LOCK
724 /** Non-blocking lock returns 1 on successful lock. */
725 extern int DWC_MUTEX_TRYLOCK(dwc_mutex_t *mutex);
726 #define dwc_mutex_trylock DWC_MUTEX_TRYLOCK
727 extern void DWC_MUTEX_UNLOCK(dwc_mutex_t *mutex);
728 #define dwc_mutex_unlock DWC_MUTEX_UNLOCK
735 /** Microsecond delay.
737 * @param usecs Microseconds to delay.
739 extern void DWC_UDELAY(uint32_t usecs);
740 #define dwc_udelay DWC_UDELAY
742 /** Millisecond delay.
744 * @param msecs Milliseconds to delay.
746 extern void DWC_MDELAY(uint32_t msecs);
747 #define dwc_mdelay DWC_MDELAY
749 /** Non-busy waiting.
750 * Sleeps for specified number of milliseconds.
752 * @param msecs Milliseconds to sleep.
754 extern void DWC_MSLEEP(uint32_t msecs);
755 #define dwc_msleep DWC_MSLEEP
757 extern uint32_t DWC_TIME(void);
758 #define dwc_time DWC_TIME
765 /** @mainpage DWC Portability and Common Library
767 * This is the documentation for the DWC Portability and Common Library.
769 * @section intro Introduction
771 * The DWC Portability library consists of wrapper calls and data structures to
772 * all low-level functions which are typically provided by the OS. The WUDEV
773 * driver uses only these functions. In order to port the WUDEV driver, only
774 * the functions in this library need to be re-implemented, with the same
775 * behavior as documented here.
777 * The Common library consists of higher level functions, which rely only on
778 * calling the functions from the DWC Portability library. These common
779 * routines are shared across modules. Some of the common libraries need to be
780 * used directly by the driver programmer when porting WUDEV. Such as the
781 * parameter and notification libraries.
783 * @section low Portability Library OS Wrapper Functions
785 * Any function starting with DWC and in all CAPS is a low-level OS-wrapper that
786 * needs to be implemented when porting, for example DWC_MUTEX_ALLOC(). All of
787 * these functions are included in the dwc_os.h file.
789 * There are many functions here covering a wide array of OS services. Please
790 * see dwc_os.h for details, and implementation notes for each function.
792 * @section common Common Library Functions
794 * Any function starting with dwc and in all lowercase is a common library
795 * routine. These functions have a portable implementation and do not need to
796 * be reimplemented when porting. The common routines can be used by any
797 * driver, and some must be used by the end user to control the drivers. For
798 * example, you must use the Parameter common library in order to set the
799 * parameters in the WUDEV module.
801 * The common libraries consist of the following:
803 * - Connection Contexts - Used internally and can be used by end-user. See dwc_cc.h
804 * - Parameters - Used internally and can be used by end-user. See dwc_params.h
805 * - Notifications - Used internally and can be used by end-user. See dwc_notifier.h
806 * - Lists - Used internally and can be used by end-user. See dwc_list.h
807 * - Memory Debugging - Used internally and can be used by end-user. See dwc_os.h
808 * - Modpow - Used internally only. See dwc_modpow.h
809 * - DH - Used internally only. See dwc_dh.h
810 * - Crypto - Used internally only. See dwc_crypto.h
813 * @section prereq Prerequistes For dwc_os.h
814 * @subsection types Data Types
816 * The dwc_os.h file assumes that several low-level data types are pre defined for the
817 * compilation environment. These data types are:
819 * - uint8_t - unsigned 8-bit data type
820 * - int8_t - signed 8-bit data type
821 * - uint16_t - unsigned 16-bit data type
822 * - int16_t - signed 16-bit data type
823 * - uint32_t - unsigned 32-bit data type
824 * - int32_t - signed 32-bit data type
825 * - uint64_t - unsigned 64-bit data type
826 * - int64_t - signed 64-bit data type
828 * Ensure that these are defined before using dwc_os.h. The easiest way to do
829 * that is to modify the top of the file to include the appropriate header.
830 * This is already done for the Linux environment. If the DWC_LINUX macro is
831 * defined, the correct header will be added. A standard header <stdint.h> is
832 * also used for environments where standard C headers are available.
834 * @subsection stdarg Variable Arguments
836 * Variable arguments are provided by a standard C header <stdarg.h>. it is
837 * available in Both the Linux and ANSI C enviornment. An equivalent must be
838 * provided in your enviornment in order to use dwc_os.h with the debug and
839 * tracing message functionality.
841 * @subsection thread Threading
843 * WUDEV Core must be run on an operating system that provides for multiple
844 * threads/processes. Threading can be implemented in many ways, even in
845 * embedded systems without an operating system. At the bare minimum, the
846 * system should be able to start any number of processes at any time to handle
847 * special work. It need not be a pre-emptive system. Process context can
848 * change upon a call to a blocking function. The hardware interrupt context
849 * that calls the module's ISR() function must be differentiable from process
850 * context, even if your processes are impemented via a hardware interrupt.
851 * Further locking mechanism between process must exist (or be implemented), and
852 * process context must have a way to disable interrupts for a period of time to
853 * lock them out. If all of this exists, the functions in dwc_os.h related to
854 * threading should be able to be implemented with the defined behavior.