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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/************************************************************************************
* arch/arm/src/lpc17xx/lpc17_ssp.h
*
* Copyright (C) 2010, 2012-2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_LPC17XX_LPC17_SSP_H
#define __ARCH_ARM_SRC_LPC17XX_LPC17_SSP_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <nuttx/spi.h>
#include "chip/lpc17_ssp.h"
#if defined(CONFIG_LPC17_SSP0) || defined(CONFIG_LPC17_SSP1)
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/************************************************************************************
* Public Types
************************************************************************************/
#ifndef __ASSEMBLY__
#ifdef __cplusplus
extern "C"
{
#endif
/************************************************************************************
* Public Data
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: lpc17_ssp0/ssp1select, lpc17_ssp0/ssp1status, and lpc17_ssp0/ssp1cmddata
*
* Description:
* These external functions must be provided by board-specific logic. They are
* implementations of the select, status, and cmddata methods of the SPI interface
* defined by struct spi_ops_s (see include/nuttx/spi.h). All other methods
* including up_spiinitialize()) are provided by common LPC17xx logic. To use
* this common SPI logic on your board:
*
* 1. Provide logic in lpc17_boardinitialize() to configure SSP chip select pins.
* 2. Provide lpc17_ssp0/ssp1select() and lpc17_ssp0/ssp1status() functions
* in your board-specific logic. These functions will perform chip selection
* and status operations using GPIOs in the way your board is configured.
* 2. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
* lpc17_ssp0/ssp1cmddata() functions in your board-specific logic. These
* functions will perform cmd/data selection operations using GPIOs in the way
* your board is configured.
* 3. Add a call to up_spiinitialize() in your low level application
* initialization logic
* 4. The handle returned by up_spiinitialize() may then be used to bind the
* SSP driver to higher level logic (e.g., calling mmcsd_spislotinitialize(),
* for example, will bind the SSP driver to the SPI MMC/SD driver).
*
************************************************************************************/
#ifdef CONFIG_LPC17_SSP0
void lpc17_ssp0select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
uint8_t lpc17_ssp0status(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
#ifdef CONFIG_SPI_CMDDATA
int lpc17_ssp0cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
#endif
#endif
#ifdef CONFIG_LPC17_SSP1
void lpc17_ssp1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
uint8_t lpc17_ssp1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
#ifdef CONFIG_SPI_CMDDATA
int lpc17_ssp1cmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
#endif
#endif
/****************************************************************************
* Name: ssp_flush
*
* Description:
* Flush and discard any words left in the RX fifo. This can be called
* from ssp0/1select after a device is deselected (if you worry about such
* things).
*
* Input Parameters:
* dev - Device-specific state data
*
* Returned Value:
* None
*
****************************************************************************/
#if defined(CONFIG_LPC17_SSP0) || defined(CONFIG_LPC17_SSP1)
void ssp_flush(FAR struct spi_dev_s *dev);
#endif
/****************************************************************************
* Name: lpc17_ssp0/1register
*
* Description:
* If the board supports a card detect callback to inform the SPI-based
* MMC/SD drvier when an SD card is inserted or removed, then
* CONFIG_SPI_CALLBACK should be defined and the following function(s) must
* must be implemented. These functiosn implements the registercallback
* method of the SPI interface (see include/nuttx/spi.h for details)
*
* Input Parameters:
* dev - Device-specific state data
* callback - The funtion to call on the media change
* arg - A caller provided value to return with the callback
*
* Returned Value:
* 0 on success; negated errno on failure.
*
****************************************************************************/
#ifdef CONFIG_SPI_CALLBACK
#ifdef CONFIG_LPC17_SSP0
int lpc17_ssp0register(FAR struct spi_dev_s *dev, spi_mediachange_t callback,
FAR void *arg);
#endif
#ifdef CONFIG_LPC17_SSP1
int lpc17_ssp1register(FAR struct spi_dev_s *dev, spi_mediachange_t callback,
FAR void *arg);
#endif
#endif
#if defined(__cplusplus)
}
#endif
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_LPC17_SSP0 || CONFIG_LPC17_SSP1 */
#endif /* __ARCH_ARM_SRC_LPC17XX_LPC17_SSP_H */
|
