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1 | /***********************license start*************** |
2 | * Author: Cavium Networks | |
3 | * | |
4 | * Contact: support@caviumnetworks.com | |
5 | * This file is part of the OCTEON SDK | |
6 | * | |
7 | * Copyright (c) 2003-2008 Cavium Networks | |
8 | * | |
9 | * This file is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License, Version 2, as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This file is distributed in the hope that it will be useful, but | |
14 | * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or | |
16 | * NONINFRINGEMENT. See the GNU General Public License for more | |
17 | * details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this file; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | * or visit http://www.gnu.org/licenses/. | |
23 | * | |
24 | * This file may also be available under a different license from Cavium. | |
25 | * Contact Cavium Networks for more information | |
26 | ***********************license end**************************************/ | |
27 | ||
28 | /* | |
29 | * | |
30 | * This file contains defines for the SPI interface | |
31 | */ | |
32 | #ifndef __CVMX_SPI_H__ | |
33 | #define __CVMX_SPI_H__ | |
34 | ||
35 | #include "cvmx-gmxx-defs.h" | |
36 | ||
37 | /* CSR typedefs have been moved to cvmx-csr-*.h */ | |
38 | ||
39 | typedef enum { | |
40 | CVMX_SPI_MODE_UNKNOWN = 0, | |
41 | CVMX_SPI_MODE_TX_HALFPLEX = 1, | |
42 | CVMX_SPI_MODE_RX_HALFPLEX = 2, | |
43 | CVMX_SPI_MODE_DUPLEX = 3 | |
44 | } cvmx_spi_mode_t; | |
45 | ||
46 | /** Callbacks structure to customize SPI4 initialization sequence */ | |
47 | typedef struct { | |
48 | /** Called to reset SPI4 DLL */ | |
49 | int (*reset_cb) (int interface, cvmx_spi_mode_t mode); | |
50 | ||
51 | /** Called to setup calendar */ | |
52 | int (*calendar_setup_cb) (int interface, cvmx_spi_mode_t mode, | |
53 | int num_ports); | |
54 | ||
55 | /** Called for Tx and Rx clock detection */ | |
56 | int (*clock_detect_cb) (int interface, cvmx_spi_mode_t mode, | |
57 | int timeout); | |
58 | ||
59 | /** Called to perform link training */ | |
60 | int (*training_cb) (int interface, cvmx_spi_mode_t mode, int timeout); | |
61 | ||
62 | /** Called for calendar data synchronization */ | |
63 | int (*calendar_sync_cb) (int interface, cvmx_spi_mode_t mode, | |
64 | int timeout); | |
65 | ||
66 | /** Called when interface is up */ | |
67 | int (*interface_up_cb) (int interface, cvmx_spi_mode_t mode); | |
68 | ||
69 | } cvmx_spi_callbacks_t; | |
70 | ||
71 | /** | |
72 | * Return true if the supplied interface is configured for SPI | |
73 | * | |
74 | * @interface: Interface to check | |
75 | * Returns True if interface is SPI | |
76 | */ | |
77 | static inline int cvmx_spi_is_spi_interface(int interface) | |
78 | { | |
79 | uint64_t gmxState = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); | |
80 | return (gmxState & 0x2) && (gmxState & 0x1); | |
81 | } | |
82 | ||
83 | /** | |
84 | * Initialize and start the SPI interface. | |
85 | * | |
86 | * @interface: The identifier of the packet interface to configure and | |
87 | * use as a SPI interface. | |
88 | * @mode: The operating mode for the SPI interface. The interface | |
89 | * can operate as a full duplex (both Tx and Rx data paths | |
90 | * active) or as a halfplex (either the Tx data path is | |
91 | * active or the Rx data path is active, but not both). | |
92 | * @timeout: Timeout to wait for clock synchronization in seconds | |
93 | * @num_ports: Number of SPI ports to configure | |
94 | * | |
95 | * Returns Zero on success, negative of failure. | |
96 | */ | |
97 | extern int cvmx_spi_start_interface(int interface, cvmx_spi_mode_t mode, | |
98 | int timeout, int num_ports); | |
99 | ||
100 | /** | |
101 | * This routine restarts the SPI interface after it has lost synchronization | |
102 | * with its corespondant system. | |
103 | * | |
104 | * @interface: The identifier of the packet interface to configure and | |
105 | * use as a SPI interface. | |
106 | * @mode: The operating mode for the SPI interface. The interface | |
107 | * can operate as a full duplex (both Tx and Rx data paths | |
108 | * active) or as a halfplex (either the Tx data path is | |
109 | * active or the Rx data path is active, but not both). | |
110 | * @timeout: Timeout to wait for clock synchronization in seconds | |
111 | * Returns Zero on success, negative of failure. | |
112 | */ | |
113 | extern int cvmx_spi_restart_interface(int interface, cvmx_spi_mode_t mode, | |
114 | int timeout); | |
115 | ||
116 | /** | |
117 | * Return non-zero if the SPI interface has a SPI4000 attached | |
118 | * | |
119 | * @interface: SPI interface the SPI4000 is connected to | |
120 | * | |
121 | * Returns | |
122 | */ | |
123 | static inline int cvmx_spi4000_is_present(int interface) | |
124 | { | |
125 | return 0; | |
126 | } | |
127 | ||
128 | /** | |
129 | * Initialize the SPI4000 for use | |
130 | * | |
131 | * @interface: SPI interface the SPI4000 is connected to | |
132 | */ | |
133 | static inline int cvmx_spi4000_initialize(int interface) | |
134 | { | |
135 | return 0; | |
136 | } | |
137 | ||
138 | /** | |
139 | * Poll all the SPI4000 port and check its speed | |
140 | * | |
141 | * @interface: Interface the SPI4000 is on | |
142 | * @port: Port to poll (0-9) | |
143 | * Returns Status of the port. 0=down. All other values the port is up. | |
144 | */ | |
145 | static inline union cvmx_gmxx_rxx_rx_inbnd cvmx_spi4000_check_speed( | |
146 | int interface, | |
147 | int port) | |
148 | { | |
149 | union cvmx_gmxx_rxx_rx_inbnd r; | |
150 | r.u64 = 0; | |
151 | return r; | |
152 | } | |
153 | ||
154 | /** | |
155 | * Get current SPI4 initialization callbacks | |
156 | * | |
157 | * @callbacks: Pointer to the callbacks structure.to fill | |
158 | * | |
159 | * Returns Pointer to cvmx_spi_callbacks_t structure. | |
160 | */ | |
161 | extern void cvmx_spi_get_callbacks(cvmx_spi_callbacks_t *callbacks); | |
162 | ||
163 | /** | |
164 | * Set new SPI4 initialization callbacks | |
165 | * | |
166 | * @new_callbacks: Pointer to an updated callbacks structure. | |
167 | */ | |
168 | extern void cvmx_spi_set_callbacks(cvmx_spi_callbacks_t *new_callbacks); | |
169 | ||
170 | /** | |
171 | * Callback to perform SPI4 reset | |
172 | * | |
173 | * @interface: The identifier of the packet interface to configure and | |
174 | * use as a SPI interface. | |
175 | * @mode: The operating mode for the SPI interface. The interface | |
176 | * can operate as a full duplex (both Tx and Rx data paths | |
177 | * active) or as a halfplex (either the Tx data path is | |
178 | * active or the Rx data path is active, but not both). | |
179 | * | |
180 | * Returns Zero on success, non-zero error code on failure (will cause | |
181 | * SPI initialization to abort) | |
182 | */ | |
183 | extern int cvmx_spi_reset_cb(int interface, cvmx_spi_mode_t mode); | |
184 | ||
185 | /** | |
186 | * Callback to setup calendar and miscellaneous settings before clock | |
187 | * detection | |
188 | * | |
189 | * @interface: The identifier of the packet interface to configure and | |
190 | * use as a SPI interface. | |
191 | * @mode: The operating mode for the SPI interface. The interface | |
192 | * can operate as a full duplex (both Tx and Rx data paths | |
193 | * active) or as a halfplex (either the Tx data path is | |
194 | * active or the Rx data path is active, but not both). | |
195 | * @num_ports: Number of ports to configure on SPI | |
196 | * | |
197 | * Returns Zero on success, non-zero error code on failure (will cause | |
198 | * SPI initialization to abort) | |
199 | */ | |
200 | extern int cvmx_spi_calendar_setup_cb(int interface, cvmx_spi_mode_t mode, | |
201 | int num_ports); | |
202 | ||
203 | /** | |
204 | * Callback to perform clock detection | |
205 | * | |
206 | * @interface: The identifier of the packet interface to configure and | |
207 | * use as a SPI interface. | |
208 | * @mode: The operating mode for the SPI interface. The interface | |
209 | * can operate as a full duplex (both Tx and Rx data paths | |
210 | * active) or as a halfplex (either the Tx data path is | |
211 | * active or the Rx data path is active, but not both). | |
212 | * @timeout: Timeout to wait for clock synchronization in seconds | |
213 | * | |
214 | * Returns Zero on success, non-zero error code on failure (will cause | |
215 | * SPI initialization to abort) | |
216 | */ | |
217 | extern int cvmx_spi_clock_detect_cb(int interface, cvmx_spi_mode_t mode, | |
218 | int timeout); | |
219 | ||
220 | /** | |
221 | * Callback to perform link training | |
222 | * | |
223 | * @interface: The identifier of the packet interface to configure and | |
224 | * use as a SPI interface. | |
225 | * @mode: The operating mode for the SPI interface. The interface | |
226 | * can operate as a full duplex (both Tx and Rx data paths | |
227 | * active) or as a halfplex (either the Tx data path is | |
228 | * active or the Rx data path is active, but not both). | |
229 | * @timeout: Timeout to wait for link to be trained (in seconds) | |
230 | * | |
231 | * Returns Zero on success, non-zero error code on failure (will cause | |
232 | * SPI initialization to abort) | |
233 | */ | |
234 | extern int cvmx_spi_training_cb(int interface, cvmx_spi_mode_t mode, | |
235 | int timeout); | |
236 | ||
237 | /** | |
238 | * Callback to perform calendar data synchronization | |
239 | * | |
240 | * @interface: The identifier of the packet interface to configure and | |
241 | * use as a SPI interface. | |
242 | * @mode: The operating mode for the SPI interface. The interface | |
243 | * can operate as a full duplex (both Tx and Rx data paths | |
244 | * active) or as a halfplex (either the Tx data path is | |
245 | * active or the Rx data path is active, but not both). | |
246 | * @timeout: Timeout to wait for calendar data in seconds | |
247 | * | |
248 | * Returns Zero on success, non-zero error code on failure (will cause | |
249 | * SPI initialization to abort) | |
250 | */ | |
251 | extern int cvmx_spi_calendar_sync_cb(int interface, cvmx_spi_mode_t mode, | |
252 | int timeout); | |
253 | ||
254 | /** | |
255 | * Callback to handle interface up | |
256 | * | |
257 | * @interface: The identifier of the packet interface to configure and | |
258 | * use as a SPI interface. | |
259 | * @mode: The operating mode for the SPI interface. The interface | |
260 | * can operate as a full duplex (both Tx and Rx data paths | |
261 | * active) or as a halfplex (either the Tx data path is | |
262 | * active or the Rx data path is active, but not both). | |
263 | * | |
264 | * Returns Zero on success, non-zero error code on failure (will cause | |
265 | * SPI initialization to abort) | |
266 | */ | |
267 | extern int cvmx_spi_interface_up_cb(int interface, cvmx_spi_mode_t mode); | |
268 | ||
269 | #endif /* __CVMX_SPI_H__ */ |