diff options
Diffstat (limited to 'drivers/staging/csr/csr_framework_ext.c')
| -rw-r--r-- | drivers/staging/csr/csr_framework_ext.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/drivers/staging/csr/csr_framework_ext.c b/drivers/staging/csr/csr_framework_ext.c new file mode 100644 index 000000000000..1586b235e296 --- /dev/null +++ b/drivers/staging/csr/csr_framework_ext.c @@ -0,0 +1,248 @@ +/***************************************************************************** + + (c) Cambridge Silicon Radio Limited 2010 + All rights reserved and confidential information of CSR + + Refer to LICENSE.txt included with this source for details + on the license terms. + +*****************************************************************************/ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/kthread.h> +#include <linux/module.h> + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 34) +#include <linux/slab.h> +#endif + +#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 19) +#include <linux/freezer.h> +#endif +#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 27) +#include <asm/semaphore.h> +#else +#include <linux/semaphore.h> +#endif + +#include <linux/bitops.h> + +#include "csr_types.h" +#include "csr_framework_ext.h" +#include "csr_panic.h" + +/*----------------------------------------------------------------------------* + * NAME + * CsrMutexCreate + * + * DESCRIPTION + * Create a mutex and return a handle to the created mutex. + * + * RETURNS + * Possible values: + * CSR_RESULT_SUCCESS in case of success + * CSR_FE_RESULT_NO_MORE_MUTEXES in case of out of mutex resources + * CSR_FE_RESULT_INVALID_POINTER in case the mutexHandle pointer is invalid + * + *----------------------------------------------------------------------------*/ +CsrResult CsrMutexCreate(CsrMutexHandle *mutexHandle) +{ + if (mutexHandle == NULL) + { + return CSR_FE_RESULT_INVALID_POINTER; + } + + sema_init(mutexHandle, 1); + + return CSR_RESULT_SUCCESS; +} + +/*----------------------------------------------------------------------------* + * NAME + * CsrMutexDestroy + * + * DESCRIPTION + * Destroy the previously created mutex. + * + * RETURNS + * void + * + *----------------------------------------------------------------------------*/ +void CsrMutexDestroy(CsrMutexHandle *mutexHandle) +{ +} + +/*----------------------------------------------------------------------------* + * NAME + * CsrMutexLock + * + * DESCRIPTION + * Lock the mutex refered to by the provided handle. + * + * RETURNS + * Possible values: + * CSR_RESULT_SUCCESS in case of success + * CSR_FE_RESULT_INVALID_HANDLE in case the mutexHandle is invalid + * + *----------------------------------------------------------------------------*/ +CsrResult CsrMutexLock(CsrMutexHandle *mutexHandle) +{ + if (mutexHandle == NULL) + { + return CSR_FE_RESULT_INVALID_POINTER; + } + + if (down_interruptible(mutexHandle)) + { + CsrPanic(CSR_TECH_FW, CSR_PANIC_FW_UNEXPECTED_VALUE, "CsrMutexLock Failed"); + return CSR_FE_RESULT_INVALID_POINTER; + } + + return CSR_RESULT_SUCCESS; +} + +/*----------------------------------------------------------------------------* + * NAME + * CsrMutexUnlock + * + * DESCRIPTION + * Unlock the mutex refered to by the provided handle. + * + * RETURNS + * Possible values: + * CSR_RESULT_SUCCESS in case of success + * CSR_FE_RESULT_INVALID_HANDLE in case the mutexHandle is invalid + * + *----------------------------------------------------------------------------*/ +CsrResult CsrMutexUnlock(CsrMutexHandle *mutexHandle) +{ + if (mutexHandle == NULL) + { + return CSR_FE_RESULT_INVALID_POINTER; + } + + up(mutexHandle); + + return CSR_RESULT_SUCCESS; +} + +/*----------------------------------------------------------------------------* + * NAME + * CsrThreadSleep + * + * DESCRIPTION + * Sleep for a given period. + * + * RETURNS + * void + * + *----------------------------------------------------------------------------*/ +void CsrThreadSleep(CsrUint16 sleepTimeInMs) +{ + unsigned long t; + + /* Convert t in ms to jiffies and round up */ + t = ((sleepTimeInMs * HZ) + 999) / 1000; + schedule_timeout_uninterruptible(t); +} +EXPORT_SYMBOL_GPL(CsrThreadSleep); + +/*----------------------------------------------------------------------------* + * NAME + * CsrMemCalloc + * + * DESCRIPTION + * Allocate dynamic memory of a given size calculated as the + * numberOfElements times the elementSize. + * + * RETURNS + * Pointer to allocated memory, or NULL in case of failure. + * Allocated memory is zero initialised. + * + *----------------------------------------------------------------------------*/ +void *CsrMemCalloc(CsrSize numberOfElements, CsrSize elementSize) +{ + void *buf; + size_t size; + + size = numberOfElements * elementSize; + + buf = kmalloc(size, GFP_KERNEL); + if (buf != NULL) + { + memset(buf, 0, size); + } + + return buf; +} + +/*----------------------------------------------------------------------------* + * NAME + * CsrMemAlloc + * + * DESCRIPTION + * Allocate dynamic memory of a given size. + * + * RETURNS + * Pointer to allocated memory, or NULL in case of failure. + * Allocated memory is not initialised. + * + *----------------------------------------------------------------------------*/ +void *CsrMemAlloc(CsrSize size) +{ + return kmalloc(size, GFP_KERNEL); +} +EXPORT_SYMBOL_GPL(CsrMemAlloc); + +/*----------------------------------------------------------------------------* + * NAME + * CsrMemFree + * + * DESCRIPTION + * Free dynamic allocated memory. + * + * RETURNS + * void + * + *----------------------------------------------------------------------------*/ +void CsrMemFree(void *pointer) +{ + kfree(pointer); +} +EXPORT_SYMBOL_GPL(CsrMemFree); + +/*----------------------------------------------------------------------------* + * NAME + * CsrMemAllocDma + * + * DESCRIPTION + * Allocate DMA capable dynamic memory of a given size. + * + * RETURNS + * Pointer to allocated memory, or NULL in case of failure. + * Allocated memory is not initialised. + * + *----------------------------------------------------------------------------*/ +void *CsrMemAllocDma(CsrSize size) +{ + return kmalloc(size, GFP_KERNEL | GFP_DMA); +} +EXPORT_SYMBOL_GPL(CsrMemAllocDma); + +/*----------------------------------------------------------------------------* + * NAME + * CsrMemFreeDma + * + * DESCRIPTION + * Free DMA capable dynamic allocated memory. + * + * RETURNS + * void + * + *----------------------------------------------------------------------------*/ +void CsrMemFreeDma(void *pointer) +{ + kfree(pointer); +} +EXPORT_SYMBOL_GPL(CsrMemFreeDma); |