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31 ******************************************************************************/
32 /*****************************************************************************/
37 * This is the header file for the implementation of QSPIPSU driver.
38 * Generic QSPI interface allows for communication to any QSPI slave device.
39 * GQSPI contains a GENFIFO into which the bus transfers required are to be
40 * pushed with appropriate configuration. The controller provides TX and RX
41 * FIFO's and a DMA to be used for RX transfers. The controller executes each
42 * GENFIFO entry noting the configuration and places data on the bus as required
44 * The different options in GENFIFO are as follows:
45 * IMM_DATA : Can be one byte of data to be transmitted, number of clocks or
46 * number of bytes in transfer.
47 * DATA_XFER : Indicates that data/clocks need to be transmitted or received.
48 * EXPONENT : e when 2^e bytes are involved in transfer.
49 * SPI_MODE : SPI/Dual SPI/Quad SPI
50 * CS : Lower or Upper CS or Both
51 * Bus : Lower or Upper Bus or Both
52 * TX : When selected, controller transmits data in IMM or fetches number of
53 * bytes mentioned form TX FIFO. If not selected, dummies are pumped.
54 * RX : When selected, controller receives and fills the RX FIFO/allows RX DMA
55 * of requested number of bytes. If not selected, RX data is discarded.
56 * Stripe : Byte stripe over lower and upper bus or not.
57 * Poll : Polls response to match for to a set value (used along with POLL_CFG
58 * registers) and then proceeds to next GENFIFO entry.
59 * This feature is not currently used in the driver.
61 * GENFIFO has manual and auto start options.
62 * All DMA requests need a 4-byte aligned destination address buffer and
63 * size of transfer should also be a multiple of 4.
64 * This driver supports DMA RX and IO RX.
67 * This driver uses the GQSPI controller with RX DMA. It supports both
68 * interrupt and polled transfers. Manual start of GENFIFO is used.
69 * XQspiPsu_CfgInitialize() initializes the instance variables.
70 * Additional setting can be done using SetOptions/ClearOptions functions
71 * and SelectSlave function.
74 * Polled or Interrupt transfers can be done. The transfer function needs the
75 * message(s) to be transmitted in the form of an array of type XQspiPsu_Msg.
76 * This is supposed to contain the byte count and any TX/RX buffers as required.
77 * Flags can be used indicate further information such as whether the message
78 * should be striped. The transfer functions form and write GENFIFO entries,
79 * check the status of the transfer and report back to the application
83 * MODIFICATION HISTORY:
85 * Ver Who Date Changes
86 * ----- --- -------- -----------------------------------------------.
87 * 1.0 hk 08/21/14 First release
88 * sk 03/13/15 Added IO mode support.
89 * hk 03/18/15 Switch to I/O mode before clearing RX FIFO.
90 * Clear and disbale DMA interrupts/status in abort.
91 * Use DMA DONE bit instead of BUSY as recommended.
95 ******************************************************************************/
96 #ifndef _XQSPIPSU_H_ /* prevent circular inclusions */
97 #define _XQSPIPSU_H_ /* by using protection macros */
103 /***************************** Include Files *********************************/
106 #include "xqspipsu_hw.h"
108 /**************************** Type Definitions *******************************/
110 * The handler data type allows the user to define a callback function to
111 * handle the asynchronous processing for the QSPIPSU device. The application
112 * using this driver is expected to define a handler of this type to support
113 * interrupt driven mode. The handler executes in an interrupt context, so
114 * only minimal processing should be performed.
116 * @param CallBackRef is the callback reference passed in by the upper
117 * layer when setting the callback functions, and passed back to
118 * the upper layer when the callback is invoked. Its type is
119 * not important to the driver, so it is a void pointer.
120 * @param StatusEvent holds one or more status events that have occurred.
121 * See the XQspiPsu_SetStatusHandler() for details on the status
122 * events that can be passed in the callback.
123 * @param ByteCount indicates how many bytes of data were successfully
124 * transferred. This may be less than the number of bytes
125 * requested if the status event indicates an error.
127 typedef void (*XQspiPsu_StatusHandler) (void *CallBackRef, u32 StatusEvent,
131 * This typedef contains configuration information for a flash message.
142 * This typedef contains configuration information for the device.
145 u16 DeviceId; /**< Unique ID of device */
146 u32 BaseAddress; /**< Base address of the device */
147 u32 InputClockHz; /**< Input clock frequency */
148 u8 ConnectionMode; /**< Single, Stacked and Parallel mode */
149 u8 BusWidth; /**< Bus width available on board */
153 * The XQspiPsu driver instance data. The user is required to allocate a
154 * variable of this type for every QSPIPSU device in the system. A pointer
155 * to a variable of this type is then passed to the driver API functions.
158 XQspiPsu_Config Config; /**< Configuration structure */
159 u32 IsReady; /**< Device is initialized and ready */
161 u8 *SendBufferPtr; /**< Buffer to send (state) */
162 u8 *RecvBufferPtr; /**< Buffer to receive (state) */
163 u8 *GenFifoBufferPtr; /**< Gen FIFO entries */
164 int TxBytes; /**< Number of bytes to transfer (state) */
165 int RxBytes; /**< Number of bytes left to transfer(state) */
166 int GenFifoEntries; /**< Number of Gen FIFO entries remaining */
167 u32 IsBusy; /**< A transfer is in progress (state) */
168 u32 ReadMode; /**< DMA or IO mode */
175 XQspiPsu_StatusHandler StatusHandler;
176 void *StatusRef; /**< Callback reference for status handler */
179 /***************** Macros (Inline Functions) Definitions *********************/
181 #define XQSPIPSU_READMODE_DMA 0x0
182 #define XQSPIPSU_READMODE_IO 0x1
184 #define XQSPIPSU_SELECT_FLASH_CS_LOWER 0x1
185 #define XQSPIPSU_SELECT_FLASH_CS_UPPER 0x2
186 #define XQSPIPSU_SELECT_FLASH_CS_BOTH 0x3
188 #define XQSPIPSU_SELECT_FLASH_BUS_LOWER 0x1
189 #define XQSPIPSU_SELECT_FLASH_BUS_UPPER 0x2
190 #define XQSPIPSU_SELECT_FLASH_BUS_BOTH 0x3
192 #define XQSPIPSU_SELECT_MODE_SPI 0x1
193 #define XQSPIPSU_SELECT_MODE_DUALSPI 0x2
194 #define XQSPIPSU_SELECT_MODE_QUADSPI 0x4
196 #define XQSPIPSU_GENFIFO_CS_SETUP 0x04
197 #define XQSPIPSU_GENFIFO_CS_HOLD 0x03
199 #define XQSPIPSU_CLK_ACTIVE_LOW_OPTION 0x2
200 #define XQSPIPSU_CLK_PHASE_1_OPTION 0x4
201 #define XQSPIPSU_MANUAL_START_OPTION 0x8
203 #define XQSPIPSU_GENFIFO_EXP_START 0x100
205 #define XQSPIPSU_DMA_BYTES_MAX 0x10000000
207 #define XQSPIPSU_CLK_PRESCALE_2 0x00
208 #define XQSPIPSU_CLK_PRESCALE_4 0x01
209 #define XQSPIPSU_CLK_PRESCALE_8 0x02
210 #define XQSPIPSU_CLK_PRESCALE_16 0x03
211 #define XQSPIPSU_CLK_PRESCALE_32 0x04
212 #define XQSPIPSU_CLK_PRESCALE_64 0x05
213 #define XQSPIPSU_CLK_PRESCALE_128 0x06
214 #define XQSPIPSU_CLK_PRESCALE_256 0x07
215 #define XQSPIPSU_CR_PRESC_MAXIMUM 7
217 #define XQSPIPSU_CONNECTION_MODE_SINGLE 0
218 #define XQSPIPSU_CONNECTION_MODE_STACKED 1
219 #define XQSPIPSU_CONNECTION_MODE_PARALLEL 2
221 /* Add more flags as required */
222 #define XQSPIPSU_MSG_FLAG_STRIPE 0x1
224 #define XQspiPsu_Select(InstancePtr) XQspiPsu_Out32((InstancePtr->Config.BaseAddress) + XQSPIPSU_SEL_OFFSET, XQSPIPSU_SEL_MASK)
226 #define XQspiPsu_Enable(InstancePtr) XQspiPsu_Out32((InstancePtr->Config.BaseAddress) + XQSPIPSU_EN_OFFSET, XQSPIPSU_EN_MASK)
228 #define XQspiPsu_Disable(InstancePtr) XQspiPsu_Out32((InstancePtr->Config.BaseAddress) + XQSPIPSU_EN_OFFSET, 0x0)
230 #define XQspiPsu_IsManualStart(InstancePtr) ((XQspiPsu_GetOptions(InstancePtr) & XQSPIPSU_MANUAL_START_OPTION) ? TRUE : FALSE)
232 /************************** Function Prototypes ******************************/
234 /* Initialization and reset */
235 XQspiPsu_Config *XQspiPsu_LookupConfig(u16 DeviceId);
236 int XQspiPsu_CfgInitialize(XQspiPsu *InstancePtr, XQspiPsu_Config *ConfigPtr,
238 void XQspiPsu_Reset(XQspiPsu *InstancePtr);
239 void XQspiPsu_Abort(XQspiPsu *InstancePtr);
241 /* Transfer functions and handlers */
242 int XQspiPsu_PolledTransfer(XQspiPsu *InstancePtr, XQspiPsu_Msg *Msg,
244 int XQspiPsu_InterruptTransfer(XQspiPsu *InstancePtr, XQspiPsu_Msg *Msg,
246 int XQspiPsu_InterruptHandler(XQspiPsu *InstancePtr);
247 void XQspiPsu_SetStatusHandler(XQspiPsu *InstancePtr, void *CallBackRef,
248 XQspiPsu_StatusHandler FuncPtr);
250 /* Configuration functions */
251 int XQspiPsu_SetClkPrescaler(XQspiPsu *InstancePtr, u8 Prescaler);
252 void XQspiPsu_SelectFlash(XQspiPsu *InstancePtr, u8 FlashCS, u8 FlashBus);
253 int XQspiPsu_SetOptions(XQspiPsu *InstancePtr, u32 Options);
254 int XQspiPsu_ClearOptions(XQspiPsu *InstancePtr, u32 Options);
255 u32 XQspiPsu_GetOptions(XQspiPsu *InstancePtr);
256 int XQspiPsu_SetReadMode(XQspiPsu *InstancePtr, u32 Mode);
263 #endif /* _XQSPIPSU_H_ */