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 <asm/octeon/cvmx-gmxx-defs.h> 36 37/* CSR typedefs have been moved to cvmx-csr-*.h */ 38 39typedef 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 */ 47typedef 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 */ 77static 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 */ 97extern 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 */ 113extern 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 */ 123static 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 */ 133static 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 */ 145static 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 */ 161extern 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 */ 168extern 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 */ 183extern 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 */ 200extern 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 */ 217extern 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 */ 234extern 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 */ 251extern 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 */ 267extern int cvmx_spi_interface_up_cb(int interface, cvmx_spi_mode_t mode); 268 269#endif /* __CVMX_SPI_H__ */ 270