summaryrefslogtreecommitdiff
path: root/arch/mips/include/asm/octeon/cvmx-spi.h
blob: d5038cc4b475a50f2581b2feed55654634450120 (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
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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
/***********************license start***************
 * Author: Cavium Networks
 *
 * Contact: support@caviumnetworks.com
 * This file is part of the OCTEON SDK
 *
 * Copyright (c) 2003-2008 Cavium Networks
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, Version 2, as
 * published by the Free Software Foundation.
 *
 * This file is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this file; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 * or visit http://www.gnu.org/licenses/.
 *
 * This file may also be available under a different license from Cavium.
 * Contact Cavium Networks for more information
 ***********************license end**************************************/

/*
 *
 * This file contains defines for the SPI interface
 */
#ifndef __CVMX_SPI_H__
#define __CVMX_SPI_H__

#include <asm/octeon/cvmx-gmxx-defs.h>

/* CSR typedefs have been moved to cvmx-csr-*.h */

typedef enum {
	CVMX_SPI_MODE_UNKNOWN = 0,
	CVMX_SPI_MODE_TX_HALFPLEX = 1,
	CVMX_SPI_MODE_RX_HALFPLEX = 2,
	CVMX_SPI_MODE_DUPLEX = 3
} cvmx_spi_mode_t;

/** Callbacks structure to customize SPI4 initialization sequence */
typedef struct {
    /** Called to reset SPI4 DLL */
	int (*reset_cb) (int interface, cvmx_spi_mode_t mode);

    /** Called to setup calendar */
	int (*calendar_setup_cb) (int interface, cvmx_spi_mode_t mode,
				  int num_ports);

    /** Called for Tx and Rx clock detection */
	int (*clock_detect_cb) (int interface, cvmx_spi_mode_t mode,
				int timeout);

    /** Called to perform link training */
	int (*training_cb) (int interface, cvmx_spi_mode_t mode, int timeout);

    /** Called for calendar data synchronization */
	int (*calendar_sync_cb) (int interface, cvmx_spi_mode_t mode,
				 int timeout);

    /** Called when interface is up */
	int (*interface_up_cb) (int interface, cvmx_spi_mode_t mode);

} cvmx_spi_callbacks_t;

/**
 * Return true if the supplied interface is configured for SPI
 *
 * @interface: Interface to check
 * Returns True if interface is SPI
 */
static inline int cvmx_spi_is_spi_interface(int interface)
{
	uint64_t gmxState = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
	return (gmxState & 0x2) && (gmxState & 0x1);
}

/**
 * Initialize and start the SPI interface.
 *
 * @interface: The identifier of the packet interface to configure and
 *		    use as a SPI interface.
 * @mode:      The operating mode for the SPI interface. The interface
 *		    can operate as a full duplex (both Tx and Rx data paths
 *		    active) or as a halfplex (either the Tx data path is
 *		    active or the Rx data path is active, but not both).
 * @timeout:   Timeout to wait for clock synchronization in seconds
 * @num_ports: Number of SPI ports to configure
 *
 * Returns Zero on success, negative of failure.
 */
extern int cvmx_spi_start_interface(int interface, cvmx_spi_mode_t mode,
				    int timeout, int num_ports);

/**
 * This routine restarts the SPI interface after it has lost synchronization
 * with its corespondant system.
 *
 * @interface: The identifier of the packet interface to configure and
 *		    use as a SPI interface.
 * @mode:      The operating mode for the SPI interface. The interface
 *		    can operate as a full duplex (both Tx and Rx data paths
 *		    active) or as a halfplex (either the Tx data path is
 *		    active or the Rx data path is active, but not both).
 * @timeout:   Timeout to wait for clock synchronization in seconds
 * Returns Zero on success, negative of failure.
 */
extern int cvmx_spi_restart_interface(int interface, cvmx_spi_mode_t mode,
				      int timeout);

/**
 * Return non-zero if the SPI interface has a SPI4000 attached
 *
 * @interface: SPI interface the SPI4000 is connected to
 *
 * Returns
 */
static inline int cvmx_spi4000_is_present(int interface)
{
	return 0;
}

/**
 * Initialize the SPI4000 for use
 *
 * @interface: SPI interface the SPI4000 is connected to
 */
static inline int cvmx_spi4000_initialize(int interface)
{
	return 0;
}

/**
 * Poll all the SPI4000 port and check its speed
 *
 * @interface: Interface the SPI4000 is on
 * @port:      Port to poll (0-9)
 * Returns Status of the port. 0=down. All other values the port is up.
 */
static inline union cvmx_gmxx_rxx_rx_inbnd cvmx_spi4000_check_speed(
	int interface,
	int port)
{
	union cvmx_gmxx_rxx_rx_inbnd r;
	r.u64 = 0;
	return r;
}

/**
 * Get current SPI4 initialization callbacks
 *
 * @callbacks:	Pointer to the callbacks structure.to fill
 *
 * Returns Pointer to cvmx_spi_callbacks_t structure.
 */
extern void cvmx_spi_get_callbacks(cvmx_spi_callbacks_t *callbacks);

/**
 * Set new SPI4 initialization callbacks
 *
 * @new_callbacks:  Pointer to an updated callbacks structure.
 */
extern void cvmx_spi_set_callbacks(cvmx_spi_callbacks_t *new_callbacks);

/**
 * Callback to perform SPI4 reset
 *
 * @interface: The identifier of the packet interface to configure and
 *		    use as a SPI interface.
 * @mode:      The operating mode for the SPI interface. The interface
 *		    can operate as a full duplex (both Tx and Rx data paths
 *		    active) or as a halfplex (either the Tx data path is
 *		    active or the Rx data path is active, but not both).
 *
 * Returns Zero on success, non-zero error code on failure (will cause
 * SPI initialization to abort)
 */
extern int cvmx_spi_reset_cb(int interface, cvmx_spi_mode_t mode);

/**
 * Callback to setup calendar and miscellaneous settings before clock
 * detection
 *
 * @interface: The identifier of the packet interface to configure and
 *		    use as a SPI interface.
 * @mode:      The operating mode for the SPI interface. The interface
 *		    can operate as a full duplex (both Tx and Rx data paths
 *		    active) or as a halfplex (either the Tx data path is
 *		    active or the Rx data path is active, but not both).
 * @num_ports: Number of ports to configure on SPI
 *
 * Returns Zero on success, non-zero error code on failure (will cause
 * SPI initialization to abort)
 */
extern int cvmx_spi_calendar_setup_cb(int interface, cvmx_spi_mode_t mode,
				      int num_ports);

/**
 * Callback to perform clock detection
 *
 * @interface: The identifier of the packet interface to configure and
 *		    use as a SPI interface.
 * @mode:      The operating mode for the SPI interface. The interface
 *		    can operate as a full duplex (both Tx and Rx data paths
 *		    active) or as a halfplex (either the Tx data path is
 *		    active or the Rx data path is active, but not both).
 * @timeout:   Timeout to wait for clock synchronization in seconds
 *
 * Returns Zero on success, non-zero error code on failure (will cause
 * SPI initialization to abort)
 */
extern int cvmx_spi_clock_detect_cb(int interface, cvmx_spi_mode_t mode,
				    int timeout);

/**
 * Callback to perform link training
 *
 * @interface: The identifier of the packet interface to configure and
 *		    use as a SPI interface.
 * @mode:      The operating mode for the SPI interface. The interface
 *		    can operate as a full duplex (both Tx and Rx data paths
 *		    active) or as a halfplex (either the Tx data path is
 *		    active or the Rx data path is active, but not both).
 * @timeout:   Timeout to wait for link to be trained (in seconds)
 *
 * Returns Zero on success, non-zero error code on failure (will cause
 * SPI initialization to abort)
 */
extern int cvmx_spi_training_cb(int interface, cvmx_spi_mode_t mode,
				int timeout);

/**
 * Callback to perform calendar data synchronization
 *
 * @interface: The identifier of the packet interface to configure and
 *		    use as a SPI interface.
 * @mode:      The operating mode for the SPI interface. The interface
 *		    can operate as a full duplex (both Tx and Rx data paths
 *		    active) or as a halfplex (either the Tx data path is
 *		    active or the Rx data path is active, but not both).
 * @timeout:   Timeout to wait for calendar data in seconds
 *
 * Returns Zero on success, non-zero error code on failure (will cause
 * SPI initialization to abort)
 */
extern int cvmx_spi_calendar_sync_cb(int interface, cvmx_spi_mode_t mode,
				     int timeout);

/**
 * Callback to handle interface up
 *
 * @interface: The identifier of the packet interface to configure and
 *		    use as a SPI interface.
 * @mode:      The operating mode for the SPI interface. The interface
 *		    can operate as a full duplex (both Tx and Rx data paths
 *		    active) or as a halfplex (either the Tx data path is
 *		    active or the Rx data path is active, but not both).
 *
 * Returns Zero on success, non-zero error code on failure (will cause
 * SPI initialization to abort)
 */
extern int cvmx_spi_interface_up_cb(int interface, cvmx_spi_mode_t mode);

#endif /* __CVMX_SPI_H__ */