1 /******************************************************************************
2 * Filename: aux_sysif.c
3 *
4 * Description: Driver for the AUX System Interface
5 *
6 * Copyright (c) 2015 - 2022, Texas Instruments Incorporated
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 *
12 * 1) Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * 2) Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 *
19 * 3) Neither the name of the ORGANIZATION nor the names of its contributors may
20 * be used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 *
35 ******************************************************************************/
36
37 #include "aux_sysif.h"
38 #include "../inc/hw_memmap_common.h"
39
40 //*****************************************************************************
41 //
42 // Handle support for DriverLib in ROM:
43 // This section will undo prototype renaming made in the header file
44 //
45 //*****************************************************************************
46 #if !defined(DOXYGEN)
47 #undef AUXSYSIFOpModeChange
48 #define AUXSYSIFOpModeChange NOROM_AUXSYSIFOpModeChange
49 #endif
50
51
52 //*****************************************************************************
53 //
54 // Used in AUXSYSIFOpModeChange() to control the change of the operational mode.
55 //
56 //*****************************************************************************
57 static const uint8_t g_OpMode_to_order[4] = {1,2,0,3};
58 static const uint8_t g_Order_to_OpMode[4] = {2,0,1,3};
59
60 //*****************************************************************************
61 //
62 // Controls AUX operational mode change
63 //
64 //*****************************************************************************
65 void
AUXSYSIFOpModeChange(uint32_t targetOpMode)66 AUXSYSIFOpModeChange(uint32_t targetOpMode)
67 {
68 uint32_t currentOpMode;
69 uint32_t currentOrder;
70 uint32_t nextMode;
71
72 // Check the argument
73 ASSERT((targetOpMode == AUX_SYSIF_OPMODEREQ_REQ_PDLP)||
74 (targetOpMode == AUX_SYSIF_OPMODEREQ_REQ_PDA) ||
75 (targetOpMode == AUX_SYSIF_OPMODEREQ_REQ_LP) ||
76 (targetOpMode == AUX_SYSIF_OPMODEREQ_REQ_A));
77
78 do {
79 currentOpMode = HWREG(AUX_SYSIF_BASE + NONSECURE_OFFSET + AUX_SYSIF_O_OPMODEREQ);
80 while ( currentOpMode != HWREG(AUX_SYSIF_BASE + NONSECURE_OFFSET + AUX_SYSIF_O_OPMODEACK));
81 if (currentOpMode != targetOpMode)
82 {
83 currentOrder = g_OpMode_to_order[currentOpMode];
84 if ( currentOrder < g_OpMode_to_order[targetOpMode])
85 {
86 nextMode = g_Order_to_OpMode[currentOrder + 1];
87 }
88 else
89 {
90 nextMode = g_Order_to_OpMode[currentOrder - 1];
91 }
92 HWREG(AUX_SYSIF_BASE + NONSECURE_OFFSET + AUX_SYSIF_O_OPMODEREQ) = nextMode;
93 }
94 } while ( currentOpMode != targetOpMode );
95 }
96
