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47 * Functions for SPI initialization, configuration,
50 * <hr>$Revision: 70030 $<hr>
52 #ifdef CVMX_BUILD_FOR_LINUX_KERNEL
53 #include <asm/octeon/cvmx.h>
54 #include <asm/octeon/cvmx-config.h>
55 #ifdef CVMX_ENABLE_PKO_FUNCTIONS
56 #include <asm/octeon/cvmx-spi.h>
57 #include <asm/octeon/cvmx-helper.h>
59 #include <asm/octeon/cvmx-pko-defs.h>
60 #include <asm/octeon/cvmx-pip-defs.h>
62 #if !defined(__FreeBSD__) || !defined(_KERNEL)
63 #include "executive-config.h"
64 #include "cvmx-config.h"
65 #ifdef CVMX_ENABLE_PKO_FUNCTIONS
69 #include "cvmx-sysinfo.h"
70 #include "cvmx-helper.h"
75 #include "cvmx-sysinfo.h"
76 #include "cvmx-helper.h"
80 #ifdef CVMX_ENABLE_PKO_FUNCTIONS
82 /* CVMX_HELPER_SPI_TIMEOUT is used to determine how long the SPI initialization
83 routines wait for SPI training. You can override the value using
84 executive-config.h if necessary */
85 #ifndef CVMX_HELPER_SPI_TIMEOUT
86 #define CVMX_HELPER_SPI_TIMEOUT 10
89 int __cvmx_helper_spi_enumerate(int interface)
91 #if defined(OCTEON_VENDOR_LANNER)
92 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_CUST_LANNER_MR955)
94 cvmx_pko_reg_crc_enable_t enable;
96 enable.u64 = cvmx_read_csr(CVMX_PKO_REG_CRC_ENABLE);
97 enable.s.enable &= 0xffff << (16 - (interface*16));
98 cvmx_write_csr(CVMX_PKO_REG_CRC_ENABLE, enable.u64);
102 /* XXX This is not entirely true. */
107 #if defined(OCTEON_VENDOR_RADISYS)
108 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_CUST_RADISYS_RSYS4GBE) {
117 if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
118 cvmx_spi4000_is_present(interface))
126 * Probe a SPI interface and determine the number of ports
127 * connected to it. The SPI interface should still be down after
130 * @param interface Interface to probe
132 * @return Number of ports on the interface. Zero to disable.
134 int __cvmx_helper_spi_probe(int interface)
136 int num_ports = __cvmx_helper_spi_enumerate(interface);
138 if (num_ports == 16) {
139 cvmx_pko_reg_crc_enable_t enable;
141 * Unlike the SPI4000, most SPI devices don't
142 * automatically put on the L2 CRC. For everything
143 * except for the SPI4000 have PKO append the L2 CRC
146 enable.u64 = cvmx_read_csr(CVMX_PKO_REG_CRC_ENABLE);
147 enable.s.enable |= 0xffff << (interface*16);
148 cvmx_write_csr(CVMX_PKO_REG_CRC_ENABLE, enable.u64);
150 __cvmx_helper_setup_gmx(interface, num_ports);
157 * Bringup and enable a SPI interface. After this call packet I/O
158 * should be fully functional. This is called with IPD enabled but
161 * @param interface Interface to bring up
163 * @return Zero on success, negative on failure
165 int __cvmx_helper_spi_enable(int interface)
167 /* Normally the ethernet L2 CRC is checked and stripped in the GMX block.
168 When you are using SPI, this isn' the case and IPD needs to check
170 int num_ports = cvmx_helper_ports_on_interface(interface);
172 for (ipd_port=interface*16; ipd_port<interface*16+num_ports; ipd_port++)
174 cvmx_pip_prt_cfgx_t port_config;
175 port_config.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
176 port_config.s.crc_en = 1;
177 #ifdef OCTEON_VENDOR_RADISYS
179 * Incoming packets on the RSYS4GBE have the FCS stripped.
181 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_CUST_RADISYS_RSYS4GBE)
182 port_config.s.crc_en = 0;
184 cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_config.u64);
187 if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM)
189 cvmx_spi_start_interface(interface, CVMX_SPI_MODE_DUPLEX, CVMX_HELPER_SPI_TIMEOUT, num_ports);
190 if (cvmx_spi4000_is_present(interface))
191 cvmx_spi4000_initialize(interface);
198 * Return the link state of an IPD/PKO port as returned by
199 * auto negotiation. The result of this function may not match
200 * Octeon's link config if auto negotiation has changed since
201 * the last call to cvmx_helper_link_set().
203 * @param ipd_port IPD/PKO port to query
207 cvmx_helper_link_info_t __cvmx_helper_spi_link_get(int ipd_port)
209 cvmx_helper_link_info_t result;
210 int interface = cvmx_helper_get_interface_num(ipd_port);
211 int index = cvmx_helper_get_interface_index_num(ipd_port);
214 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM)
216 /* The simulator gives you a simulated full duplex link */
217 result.s.link_up = 1;
218 result.s.full_duplex = 1;
219 result.s.speed = 10000;
221 else if (cvmx_spi4000_is_present(interface))
223 cvmx_gmxx_rxx_rx_inbnd_t inband = cvmx_spi4000_check_speed(interface, index);
224 result.s.link_up = inband.s.status;
225 result.s.full_duplex = inband.s.duplex;
226 switch (inband.s.speed)
228 case 0: /* 10 Mbps */
231 case 1: /* 100 Mbps */
232 result.s.speed = 100;
235 result.s.speed = 1000;
237 case 3: /* Illegal */
239 result.s.link_up = 0;
245 /* For generic SPI we can't determine the link, just return some
247 result.s.link_up = 1;
248 result.s.full_duplex = 1;
249 result.s.speed = 10000;
257 * Configure an IPD/PKO port for the specified link state. This
258 * function does not influence auto negotiation at the PHY level.
259 * The passed link state must always match the link state returned
260 * by cvmx_helper_link_get(). It is normally best to use
261 * cvmx_helper_link_autoconf() instead.
263 * @param ipd_port IPD/PKO port to configure
264 * @param link_info The new link state
266 * @return Zero on success, negative on failure
268 int __cvmx_helper_spi_link_set(int ipd_port, cvmx_helper_link_info_t link_info)
270 /* Nothing to do. If we have a SPI4000 then the setup was already performed
271 by cvmx_spi4000_check_speed(). If not then there isn't any link
276 #endif /* CVMX_ENABLE_PKO_FUNCTIONS */