1 /******************************************************************************
3 * Copyright (C) 2014 Xilinx, Inc. All rights reserved.
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15 * Use of the Software is limited solely to applications:
16 * (a) running on a Xilinx device, or
17 * (b) that interact with a Xilinx device through a bus or interconnect.
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31 ******************************************************************************/
32 /*****************************************************************************/
35 * The CSU_DMA is present inside CSU (Configuration Security Unit) module which
36 * is located within the Low-Power Subsystem (LPS) internal to the PS.
37 * CSU_DMA allows the CSU to move data efficiently between the memory (32 bit
38 * AXI interface) and the CSU stream peripherals (SHA, AES and PCAP) via Secure
39 * Stream Switch (SSS).
41 * The CSU_DMA is a 2 channel simple DMA, allowing separate control of the SRC
42 * (read) channel and DST (write) channel. The DMA is effectively able to
44 * - From PS-side to the SSS-side (SRC DMA only)
45 * - From SSS-side to the PS-side (DST DMA only)
46 * - Simultaneous PS-side to SSS_side and SSS-side to the PS-side
48 * <b>Initialization & Configuration</b>
50 * The device driver enables higher layer software (e.g., an application) to
51 * communicate to the CSU_DMA core.
53 * XCsuDma_CfgInitialize() API is used to initialize the CSU_DMA core.
54 * The user needs to first call the XCsuDma_LookupConfig() API which returns
55 * the Configuration structure pointer which is passed as a parameter to the
56 * XCsuDma_CfgInitialize() API.
59 * This driver will not support handling of interrupts user should write handler
60 * to handle the interrupts.
62 * <b> Virtual Memory </b>
64 * This driver supports Virtual Memory. The RTOS is responsible for calculating
65 * the correct device base address in Virtual Memory space.
69 * This driver is not thread safe. Any needs for threads or thread mutual
70 * exclusion must be satisfied by the layer above this driver.
74 * Asserts are used within all Xilinx drivers to enforce constraints on argument
75 * values. Asserts can be turned off on a system-wide basis by defining, at
76 * compile time, the NDEBUG identifier. By default, asserts are turned on and it
77 * is recommended that users leave asserts on during development.
79 * <b> Building the driver </b>
81 * The XCsuDma driver is composed of several source files. This allows the user
82 * to build and link only those parts of the driver that are necessary.
85 * @addtogroup csudma_v1_0
89 * This header file contains identifiers and register-level driver functions (or
90 * macros), range macros, structure typedefs that can be used to access the
91 * Xilinx CSU_DMA core instance.
95 * MODIFICATION HISTORY:
97 * Ver Who Date Changes
98 * ----- ------ -------- -----------------------------------------------------
99 * 1.0 vnsld 22/10/14 First release
102 ******************************************************************************/
105 #define XCSUDMA_H_ /**< Prevent circular inclusions
106 * by using protection macros */
112 /***************************** Include Files *********************************/
114 #include "xcsudma_hw.h"
115 #include "xil_types.h"
116 #include "xil_assert.h"
118 #include "xil_cache.h"
120 /************************** Constant Definitions *****************************/
122 /** @name CSU_DMA Channels
126 XCSUDMA_SRC_CHANNEL = 0U, /**< Source Channel of CSU_DMA */
127 XCSUDMA_DST_CHANNEL /**< Destination Channel of CSU_DMA */
131 /** @name CSU_DMA pause types
135 XCSUDMA_PAUSE_MEMORY, /**< Pauses memory data transfer
137 XCSUDMA_PAUSE_STREAM, /**< Pauses stream data transfer
144 /** @name Ranges of Size
147 #define XCSUDMA_SIZE_MAX 0x07FFFFFF /**< Maximum allowed no of words */
151 /***************** Macros (Inline Functions) Definitions *********************/
153 /*****************************************************************************/
156 * This function resets the CSU_DMA core.
164 * void XCsuDma_Reset()
166 ******************************************************************************/
167 #define XCsuDma_Reset() \
168 Xil_Out32(((u32)(XCSU_BASEADDRESS) + (u32)(XCSU_DMA_RESET_OFFSET)), \
169 (u32)(XCSUDMA_RESET_SET_MASK)); \
170 Xil_Out32(((u32)(XCSU_BASEADDRESS) + (u32)(XCSU_DMA_RESET_OFFSET)), \
171 (u32)(XCSUDMA_RESET_UNSET_MASK));
173 /*****************************************************************************/
175 * This function will be in busy while loop until the data transfer is
178 * @param InstancePtr is a pointer to XCsuDma instance to be worked on.
179 * @param Channel represents the type of channel either it is Source or
181 * Source channel - XCSUDMA_SRC_CHANNEL
182 * Destination Channel - XCSUDMA_DST_CHANNEL
186 * @note This function should be called after XCsuDma_Transfer in polled
187 * mode to wait until the data gets transfered completely.
189 * void XCsuDma_WaitForDone(XCsuDma *InstancePtr,
190 * XCsuDma_Channel Channel)
192 ******************************************************************************/
193 #define XCsuDma_WaitForDone(InstancePtr,Channel) \
194 while((XCsuDma_ReadReg(((InstancePtr)->Config.BaseAddress), \
195 ((u32)(XCSUDMA_I_STS_OFFSET) + \
196 ((u32)(Channel) * (u32)(XCSUDMA_OFFSET_DIFF)))) & \
197 (u32)(XCSUDMA_IXR_DONE_MASK)) != (XCSUDMA_IXR_DONE_MASK))
199 /*****************************************************************************/
202 * This function returns the number of completed SRC/DST DMA transfers that
203 * have not been acknowledged by software based on the channel selection.
205 * @param InstancePtr is a pointer to XCsuDma instance to be worked on.
206 * @param Channel represents the type of channel either it is Source or
208 * Source channel - XCSUDMA_SRC_CHANNEL
209 * Destination Channel - XCSUDMA_DST_CHANNEL
211 * @return Count is number of completed DMA transfers but not acknowledged
213 * - 000 - All finished transfers have been acknowledged.
214 * - Count - Count number of finished transfers are still
219 * u8 XCsuDma_GetDoneCount(XCsuDma *InstancePtr,
220 * XCsuDma_Channel Channel)
222 ******************************************************************************/
223 #define XCsuDma_GetDoneCount(InstancePtr, Channel) \
224 ((XCsuDma_ReadReg(((InstancePtr)->Config.BaseAddress), \
225 ((u32)(XCSUDMA_STS_OFFSET) + \
226 ((u32)(Channel) * (u32)(XCSUDMA_OFFSET_DIFF)))) & \
227 (u32)(XCSUDMA_STS_DONE_CNT_MASK)) >> \
228 (u32)(XCSUDMA_STS_DONE_CNT_SHIFT))
230 /*****************************************************************************/
233 * This function returns the current SRC/DST FIFO level in 32 bit words of the
235 * @param InstancePtr is a pointer to XCsuDma instance to be worked on.
236 * @param Channel represents the type of channel either it is Source or
238 * Source channel - XCSUDMA_SRC_CHANNEL
239 * Destination Channel - XCSUDMA_DST_CHANNEL
241 * @return FIFO level. (Range is 0 to 128)
242 * - 0 Indicates empty
243 * - Any number 1 to 128 indicates the number of entries in FIFO.
247 * u8 XCsuDma_GetFIFOLevel(XCsuDma *InstancePtr,
248 * XCsuDma_Channel Channel)
250 ******************************************************************************/
251 #define XCsuDma_GetFIFOLevel(InstancePtr, Channel) \
252 ((XCsuDma_ReadReg(((InstancePtr)->Config.BaseAddress), \
253 ((u32)(XCSUDMA_STS_OFFSET) + \
254 ((u32)(Channel) * (u32)(XCSUDMA_OFFSET_DIFF)))) & \
255 (u32)(XCSUDMA_STS_FIFO_LEVEL_MASK)) >> \
256 (u32)(XCSUDMA_STS_FIFO_LEVEL_SHIFT))
258 /*****************************************************************************/
261 * This function returns the current number of read(src)/write(dst) outstanding
262 * commands based on the type of channel selected.
264 * @param InstancePtr is a pointer to XCsuDma instance to be worked on.
265 * @param Channel represents the type of channel either it is Source or
267 * Source channel - XCSUDMA_SRC_CHANNEL
268 * Destination Channel - XCSUDMA_DST_CHANNEL
270 * @return Count of outstanding commands. (Range is 0 to 9).
274 * u8 XCsuDma_GetWROutstandCount(XCsuDma *InstancePtr,
275 * XCsuDma_Channel Channel)
277 ******************************************************************************/
278 #define XCsuDma_GetWROutstandCount(InstancePtr, Channel) \
279 ((XCsuDma_ReadReg(((InstancePtr)->Config.BaseAddress), \
280 ((u32)(XCSUDMA_STS_OFFSET) + \
281 ((u32)(Channel) * (u32)(XCSUDMA_OFFSET_DIFF)))) & \
282 (u32)(XCUSDMA_STS_OUTSTDG_MASK)) >> \
283 (u32)(XCUSDMA_STS_OUTSTDG_SHIFT))
285 /*****************************************************************************/
288 * This function returns the status of Channel either it is busy or not.
290 * @param InstancePtr is a pointer to XCsuDma instance to be worked on.
291 * @param Channel represents the type of channel either it is Source or
293 * Source channel - XCSUDMA_SRC_CHANNEL
294 * Destination Channel - XCSUDMA_DST_CHANNEL
296 * @return Returns the current status of the core.
297 * - TRUE represents core is currently busy.
298 * - FALSE represents core is not involved in any transfers.
302 * s32 XCsuDma_IsBusy(XCsuDma *InstancePtr, XCsuDma_Channel Channel)
304 ******************************************************************************/
306 #define XCsuDma_IsBusy(InstancePtr, Channel) \
307 ((XCsuDma_ReadReg(((InstancePtr)->Config.BaseAddress), \
308 ((u32)(XCSUDMA_STS_OFFSET) + \
309 ((u32)(Channel) * (u32)(XCSUDMA_OFFSET_DIFF)))) & \
310 (u32)(XCSUDMA_STS_BUSY_MASK)) == (XCSUDMA_STS_BUSY_MASK)) ? \
314 /**************************** Type Definitions *******************************/
317 * This typedef contains configuration information for a CSU_DMA core.
318 * Each CSU_DMA core should have a configuration structure associated.
321 u16 DeviceId; /**< DeviceId is the unique ID of the
323 u32 BaseAddress; /**< BaseAddress is the physical base address
324 * of the device's registers */
328 /******************************************************************************/
331 * The XCsuDma driver instance data structure. A pointer to an instance data
332 * structure is passed around by functions to refer to a specific driver
336 XCsuDma_Config Config; /**< Hardware configuration */
337 u32 IsReady; /**< Device and the driver instance
342 /******************************************************************************/
344 * This typedef contains all the configuration feilds which needs to be set
345 * before the start of the data transfer. All these feilds of CSU_DMA can be
346 * configured by using XCsuDma_SetConfig API.
349 u8 SssFifoThesh; /**< SSS FIFO threshold value */
350 u8 ApbErr; /**< ABP invalid access error */
351 u8 EndianType; /**< Type of endianess */
352 u8 AxiBurstType; /**< Type of AXI bus */
353 u32 TimeoutValue; /**< Time out value */
354 u8 FifoThresh; /**< FIFO threshold value */
355 u8 Acache; /**< AXI CACHE selection */
356 u8 RouteBit; /**< Selection of Route */
357 u8 TimeoutEn; /**< Enable of time out counters */
358 u16 TimeoutPre; /**< Pre scaler value */
359 u8 MaxOutCmds; /**< Maximum number of outstanding
363 /*****************************************************************************/
366 /************************** Function Prototypes ******************************/
368 XCsuDma_Config *XCsuDma_LookupConfig(u16 DeviceId);
370 s32 XCsuDma_CfgInitialize(XCsuDma *InstancePtr, XCsuDma_Config *CfgPtr,
372 void XCsuDma_Transfer(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
373 UINTPTR Addr, u32 Size, u8 EnDataLast);
374 void XCsuDma_LoopBackTransfer(XCsuDma *InstancePtr, u64 SrcAddr, u64 DstAddr,
376 u64 XCsuDma_GetAddr(XCsuDma *InstancePtr, XCsuDma_Channel Channel);
377 u32 XCsuDma_GetSize(XCsuDma *InstancePtr, XCsuDma_Channel Channel);
379 void XCsuDma_Pause(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
380 XCsuDma_PauseType Type);
381 s32 XCsuDma_IsPaused(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
382 XCsuDma_PauseType Type);
383 void XCsuDma_Resume(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
384 XCsuDma_PauseType Type);
386 u32 XCsuDma_GetCheckSum(XCsuDma *InstancePtr);
387 void XCsuDma_ClearCheckSum(XCsuDma *InstancePtr);
389 void XCsuDma_SetConfig(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
390 XCsuDma_Configure *ConfigurValues);
391 void XCsuDma_GetConfig(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
392 XCsuDma_Configure *ConfigurValues);
393 void XCsuDma_ClearDoneCount(XCsuDma *InstancePtr, XCsuDma_Channel Channel);
395 void XCsuDma_SetSafetyCheck(XCsuDma *InstancePtr, u32 Value);
396 u32 XCsuDma_GetSafetyCheck(XCsuDma *InstancePtr);
398 /* Interrupt related APIs */
399 u32 XCsuDma_IntrGetStatus(XCsuDma *InstancePtr, XCsuDma_Channel Channel);
400 void XCsuDma_IntrClear(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
402 void XCsuDma_EnableIntr(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
404 void XCsuDma_DisableIntr(XCsuDma *InstancePtr, XCsuDma_Channel Channel,
406 u32 XCsuDma_GetIntrMask(XCsuDma *InstancePtr, XCsuDma_Channel Channel);
408 s32 XCsuDma_SelfTest(XCsuDma *InstancePtr);
410 /******************************************************************************/
417 #endif /* End of protection macro */