]> git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/CORTEX_A53_64-bit_UltraScale_MPSoC/RTOSDemo_A53_bsp/psu_cortexa53_0/libsrc/spips_v3_0/src/xspips_hw.c
Completely re-generate the Zynq 7000 demo using the 2016.1 SDK tools.
[freertos] / FreeRTOS / Demo / CORTEX_A53_64-bit_UltraScale_MPSoC / RTOSDemo_A53_bsp / psu_cortexa53_0 / libsrc / spips_v3_0 / src / xspips_hw.c
1 /******************************************************************************
2 *
3 * Copyright (C) 2013 - 2015 Xilinx, Inc.  All rights reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
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10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * Use of the Software is limited solely to applications:
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18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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29 * this Software without prior written authorization from Xilinx.
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31 ******************************************************************************/
32 /*****************************************************************************/
33 /**
34 *
35 * @file xspips_hw.c
36 *
37 * Contains the reset and post boot rom state initialization.
38 * Function prototypes in xspips_hw.h
39 *
40 * <pre>
41 * MODIFICATION HISTORY:
42 *
43 * Ver   Who    Date     Changes
44 * ----- ------ -------- -----------------------------------------------
45 * 1.06a hk     08/22/13 First release.
46 * 3.00  kvn    02/13/15 Modified code for MISRA-C:2012 compliance.
47 *
48 * </pre>
49 *
50 ******************************************************************************/
51
52 /***************************** Include Files *********************************/
53
54 #include "xspips_hw.h"
55
56 /************************** Constant Definitions *****************************/
57
58
59 /**************************** Type Definitions *******************************/
60
61
62 /***************** Macros (Inline Functions) Definitions *********************/
63
64
65 /************************** Variable Definitions *****************************/
66
67
68 /*****************************************************************************/
69 /**
70 *
71 * Resets the spi module
72 *
73 * @param    BaseAddress is the base address of the device.
74 *
75 * @return       None
76 *
77 * @note         None.
78 *
79 ******************************************************************************/
80 void XSpiPs_ResetHw(u32 BaseAddress)
81 {
82         u32 Check;
83         /*
84          * Disable Interrupts
85          */
86         XSpiPs_WriteReg(BaseAddress, XSPIPS_IDR_OFFSET,
87                         XSPIPS_IXR_DISABLE_ALL_MASK);
88
89         /*
90          * Disable device
91          */
92         XSpiPs_WriteReg(BaseAddress, XSPIPS_ER_OFFSET,
93                                 0U);
94         /*
95          * Write default value to RX and TX threshold registers
96          * RX threshold should be set to 1 here as the corresponding
97          * status bit is used to clear the FIFO next
98          */
99         XSpiPs_WriteReg(BaseAddress, XSPIPS_TXWR_OFFSET,
100                         (XSPIPS_TXWR_RESET_VALUE & XSPIPS_TXWR_MASK));
101         XSpiPs_WriteReg(BaseAddress, XSPIPS_RXWR_OFFSET,
102                         (XSPIPS_RXWR_RESET_VALUE & XSPIPS_RXWR_MASK));
103
104         /*
105          * Clear RXFIFO
106          */
107         Check = (XSpiPs_ReadReg(BaseAddress,XSPIPS_SR_OFFSET) &
108                 XSPIPS_IXR_RXNEMPTY_MASK);
109         while (Check != 0U) {
110                 (void)XSpiPs_ReadReg(BaseAddress, XSPIPS_RXD_OFFSET);
111                 Check = (XSpiPs_ReadReg(BaseAddress,XSPIPS_SR_OFFSET) &
112                         XSPIPS_IXR_RXNEMPTY_MASK);
113         }
114
115         /*
116          * Clear status register by writing 1 to the write to clear bits
117          */
118         XSpiPs_WriteReg(BaseAddress, XSPIPS_SR_OFFSET,
119                                 XSPIPS_IXR_WR_TO_CLR_MASK);
120
121         /*
122          * Write default value to configuration register
123          * De-select all slaves
124          */
125         XSpiPs_WriteReg(BaseAddress, XSPIPS_CR_OFFSET,
126                                 XSPIPS_CR_RESET_STATE |
127                                 XSPIPS_CR_SSCTRL_MASK);
128
129 }