blob: cbf334d1c761f0b679618a2120cd939dee541bef (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*****************************************************************************
* Copyright 2004 - 2008 Broadcom Corporation. All rights reserved.
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2, available at
* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a
* license other than the GPL, without Broadcom's express prior written
* consent.
*****************************************************************************/
/****************************************************************************/
/**
* @file dmacHw_priv.h
*
* @brief Private Definitions for low level DMA driver
*
*/
/****************************************************************************/
#ifndef _DMACHW_PRIV_H
#define _DMACHW_PRIV_H
#include <csp/stdint.h>
/* Data type for DMA Link List Item */
typedef struct {
uint32_t sar; /* Source Adress Register.
Address must be aligned to CTLx.SRC_TR_WIDTH. */
uint32_t dar; /* Destination Address Register.
Address must be aligned to CTLx.DST_TR_WIDTH. */
uint32_t llpPhy; /* LLP contains the physical address of the next descriptor for block chaining using linked lists.
Address MUST be aligned to a 32-bit boundary. */
dmacHw_REG64_t ctl; /* Control Register. 64 bits */
uint32_t sstat; /* Source Status Register */
uint32_t dstat; /* Destination Status Register */
uint32_t devCtl; /* Device specific control information */
uint32_t llp; /* LLP contains the virtual address of the next descriptor for block chaining using linked lists. */
} dmacHw_DESC_t;
/*
* Descriptor ring pointers
*/
typedef struct {
int num; /* Number of link items */
dmacHw_DESC_t *pHead; /* Head of descriptor ring (for writing) */
dmacHw_DESC_t *pTail; /* Tail of descriptor ring (for reading) */
dmacHw_DESC_t *pProg; /* Descriptor to program the channel (for programming the channel register) */
dmacHw_DESC_t *pEnd; /* End of current descriptor chain */
dmacHw_DESC_t *pFree; /* Descriptor to free memory (freeing dynamic memory) */
uint32_t virt2PhyOffset; /* Virtual to physical address offset for the descriptor ring */
} dmacHw_DESC_RING_t;
/*
* DMA channel control block
*/
typedef struct {
uint32_t module; /* DMA controller module (0-1) */
uint32_t channel; /* DMA channel (0-7) */
volatile uint32_t varDataStarted; /* Flag indicating variable data channel is enabled */
volatile uint32_t descUpdated; /* Flag to indicate descriptor update is complete */
void *userData; /* Channel specifc user data */
} dmacHw_CBLK_t;
#define dmacHw_ASSERT(a) if (!(a)) while (1)
#define dmacHw_MAX_CHANNEL_COUNT 16
#define dmacHw_FREE_USER_MEMORY 0xFFFFFFFF
#define dmacHw_DESC_FREE dmacHw_REG_CTL_DONE
#define dmacHw_DESC_INIT ((dmacHw_DESC_t *) 0xFFFFFFFF)
#define dmacHw_MAX_BLOCKSIZE 4064
#define dmacHw_GET_DESC_RING(addr) (dmacHw_DESC_RING_t *)(addr)
#define dmacHw_ADDRESS_MASK(byte) ((byte) - 1)
#define dmacHw_NEXT_DESC(rp, dp) ((rp)->dp = (dmacHw_DESC_t *)(rp)->dp->llp)
#define dmacHw_HANDLE_TO_CBLK(handle) ((dmacHw_CBLK_t *) (handle))
#define dmacHw_CBLK_TO_HANDLE(cblkp) ((dmacHw_HANDLE_t) (cblkp))
#define dmacHw_DST_IS_MEMORY(tt) (((tt) == dmacHw_TRANSFER_TYPE_PERIPHERAL_TO_MEM) || ((tt) == dmacHw_TRANSFER_TYPE_MEM_TO_MEM)) ? 1 : 0
/****************************************************************************/
/**
* @brief Get next available transaction width
*
*
* @return On success : Next available transaction width
* On failure : dmacHw_TRANSACTION_WIDTH_8
*
* @note
* None
*/
/****************************************************************************/
static inline dmacHw_TRANSACTION_WIDTH_e dmacHw_GetNextTrWidth(dmacHw_TRANSACTION_WIDTH_e tw /* [ IN ] Current transaction width */
) {
if (tw & dmacHw_REG_CTL_SRC_TR_WIDTH_MASK) {
return ((tw >> dmacHw_REG_CTL_SRC_TR_WIDTH_SHIFT) -
1) << dmacHw_REG_CTL_SRC_TR_WIDTH_SHIFT;
} else if (tw & dmacHw_REG_CTL_DST_TR_WIDTH_MASK) {
return ((tw >> dmacHw_REG_CTL_DST_TR_WIDTH_SHIFT) -
1) << dmacHw_REG_CTL_DST_TR_WIDTH_SHIFT;
}
/* Default return */
return dmacHw_SRC_TRANSACTION_WIDTH_8;
}
/****************************************************************************/
/**
* @brief Get number of bytes per transaction
*
* @return Number of bytes per transaction
*
*
* @note
* None
*/
/****************************************************************************/
static inline int dmacHw_GetTrWidthInBytes(dmacHw_TRANSACTION_WIDTH_e tw /* [ IN ] Transaction width */
) {
int width = 1;
switch (tw) {
case dmacHw_SRC_TRANSACTION_WIDTH_8:
width = 1;
break;
case dmacHw_SRC_TRANSACTION_WIDTH_16:
case dmacHw_DST_TRANSACTION_WIDTH_16:
width = 2;
break;
case dmacHw_SRC_TRANSACTION_WIDTH_32:
case dmacHw_DST_TRANSACTION_WIDTH_32:
width = 4;
break;
case dmacHw_SRC_TRANSACTION_WIDTH_64:
case dmacHw_DST_TRANSACTION_WIDTH_64:
width = 8;
break;
default:
dmacHw_ASSERT(0);
}
/* Default transaction width */
return width;
}
#endif /* _DMACHW_PRIV_H */
|
