source: rtems/c/src/lib/libcpu/powerpc/mpc55xx/include/dspi.h @ 574fb67

4.104.114.9
Last change on this file since 574fb67 was 574fb67, checked in by Thomas Doerfler <Thomas.Doerfler@…>, on Jul 14, 2008 at 4:15:28 PM

updated gen83xx BSP
updated haleakala BSP
added MPC55xx BSP

  • Property mode set to 100644
File size: 2.5 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup mpc55xx_dspi
5 *
6 * @brief Header file for the LibI2C bus driver for the Deserial Serial Peripheral Interface (DSPI).
7 */
8
9/*
10 * Copyright (c) 2008
11 * Embedded Brains GmbH
12 * Obere Lagerstr. 30
13 * D-82178 Puchheim
14 * Germany
15 * rtems@embedded-brains.de
16 *
17 * The license and distribution terms for this file may be found in the file
18 * LICENSE in this distribution or at http://www.rtems.com/license/LICENSE.
19 */
20
21/**
22 * @defgroup mpc55xx_dspi Deserial Serial Peripheral Interface (DSPI)
23 *
24 * @ingroup mpc55xx
25 */
26
27#ifndef LIBCPU_POWERPC_MPC55XX_DSPI_H
28#define LIBCPU_POWERPC_MPC55XX_DSPI_H
29
30#include <rtems/libi2c.h>
31
32#ifdef __cplusplus
33extern "C" {
34#endif /* __cplusplus */
35
36struct DSPI_tag;
37
38/**
39 * @brief LibI2C bus driver entry.
40 */
41typedef struct {
42        /**
43         * @brief Standard bus driver fields.
44         */
45        rtems_libi2c_bus_t bus;
46
47        /**
48         * @brief Index in the bus table: @ref mpc55xx_dspi_bus_table.
49         */
50        unsigned table_index;
51
52        /**
53         * @brief Bus number (available after rtems_libi2c_register_bus()).
54         *
55         * @note You must set it in the initialization code after the bus registration.
56         */
57        unsigned bus_number;
58
59        /**
60         * @brief Hardware registers.
61         */
62        volatile struct DSPI_tag *regs;
63
64        /**
65         * @brief Selects SPI master or slave mode.
66         */
67        int master;
68
69        /**
70         * @brief Data for the Push Register.
71         */
72        union DSPI_PUSHR_tag push_data;
73
74        /**
75         * @brief eDMA channel for transmission.
76         *
77         * The channel is fixed to particular DSPI.
78         */
79        int edma_channel_transmit;
80
81        /**
82         * @brief eDMA channel to generate the push data.
83         *
84         * You can choose any available channel.
85         */
86        int edma_channel_push;
87
88        /**
89         * @brief eDMA channel for receiving.
90         *
91         * The channel is fixed to particular DSPI.
92         */
93        int edma_channel_receive;
94
95        /**
96         * @brief Semaphore ID for a transmit update.
97         */
98        rtems_id edma_channel_transmit_update;
99
100        /**
101         * @brief Semaphore ID for a receive update.
102         */
103        rtems_id edma_channel_receive_update;
104
105        /**
106         * @brief Transmit error status.
107         */
108        uint32_t edma_channel_transmit_error;
109
110        /**
111         * @brief Receive error status.
112         */
113        uint32_t edma_channel_receive_error;
114
115        /**
116         * @brief Idle character transmitted in read only mode.
117         */
118        uint32_t idle_char;
119} mpc55xx_dspi_bus_entry;
120
121/**
122 * @brief Number of DSPIs.
123 */
124#define MPC55XX_DSPI_NUMBER 4
125
126/**
127 * @brief Table with bus driver entries.
128 */
129extern mpc55xx_dspi_bus_entry mpc55xx_dspi_bus_table [ /* MPC55XX_DSPI_NUMBER */ ];
130
131#ifdef __cplusplus
132}
133#endif /* __cplusplus */
134
135#endif /* LIBCPU_POWERPC_MPC55XX_DSPI_H */
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