1 files changed, 205 insertions, 0 deletions

diff --git a/arch/mips/cavium-octeon/executive/cvmx-helper-spi.c b/arch/mips/cavium-octeon/executive/cvmx-helper-spi.c
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index 000000000000..2830e4bdf7f3
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+++ b/arch/mips/cavium-octeon/executive/cvmx-helper-spi.c
@@ -0,0 +1,205 @@
+/***********************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**************************************/
+
+void __cvmx_interrupt_gmxx_enable(int interface);
+void __cvmx_interrupt_spxx_int_msk_enable(int index);
+void __cvmx_interrupt_stxx_int_msk_enable(int index);
+
+/*
+ * Functions for SPI initialization, configuration,
+ * and monitoring.
+ */
+#include <asm/octeon/octeon.h>
+
+#include <asm/octeon/cvmx-config.h>
+#include <asm/octeon/cvmx-spi.h>
+#include <asm/octeon/cvmx-helper.h>
+
+#include <asm/octeon/cvmx-pip-defs.h>
+#include <asm/octeon/cvmx-pko-defs.h>
+
+/*
+ * CVMX_HELPER_SPI_TIMEOUT is used to determine how long the SPI
+ * initialization routines wait for SPI training. You can override the
+ * value using executive-config.h if necessary.
+ */
+#ifndef CVMX_HELPER_SPI_TIMEOUT
+#define CVMX_HELPER_SPI_TIMEOUT 10
+#endif
+
+int __cvmx_helper_spi_enumerate(int interface)
+{
+        if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
+            cvmx_spi4000_is_present(interface)) {
+                return 10;
+        } else {
+                return 16;
+        }
+}
+
+/**
+ * Probe a SPI interface and determine the number of ports
+ * connected to it. The SPI interface should still be down after
+ * this call.
+ *
+ * @interface: Interface to probe
+ *
+ * Returns Number of ports on the interface. Zero to disable.
+ */
+int __cvmx_helper_spi_probe(int interface)
+{
+        int num_ports = 0;
+
+        if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
+            cvmx_spi4000_is_present(interface)) {
+                num_ports = 10;
+        } else {
+                union cvmx_pko_reg_crc_enable enable;
+                num_ports = 16;
+                /*
+                 * Unlike the SPI4000, most SPI devices don't
+                 * automatically put on the L2 CRC. For everything
+                 * except for the SPI4000 have PKO append the L2 CRC
+                 * to the packet.
+                 */
+                enable.u64 = cvmx_read_csr(CVMX_PKO_REG_CRC_ENABLE);
+                enable.s.enable |= 0xffff << (interface * 16);
+                cvmx_write_csr(CVMX_PKO_REG_CRC_ENABLE, enable.u64);
+        }
+        __cvmx_helper_setup_gmx(interface, num_ports);
+        return num_ports;
+}
+
+/**
+ * Bringup and enable a SPI interface. After this call packet I/O
+ * should be fully functional. This is called with IPD enabled but
+ * PKO disabled.
+ *
+ * @interface: Interface to bring up
+ *
+ * Returns Zero on success, negative on failure
+ */
+int __cvmx_helper_spi_enable(int interface)
+{
+        /*
+         * Normally the ethernet L2 CRC is checked and stripped in the
+         * GMX block.  When you are using SPI, this isn' the case and
+         * IPD needs to check the L2 CRC.
+         */
+        int num_ports = cvmx_helper_ports_on_interface(interface);
+        int ipd_port;
+        for (ipd_port = interface * 16; ipd_port < interface * 16 + num_ports;
+             ipd_port++) {
+                union cvmx_pip_prt_cfgx port_config;
+                port_config.u64 = cvmx_read_csr(CVMX_PIP_PRT_CFGX(ipd_port));
+                port_config.s.crc_en = 1;
+                cvmx_write_csr(CVMX_PIP_PRT_CFGX(ipd_port), port_config.u64);
+        }
+
+        if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) {
+                cvmx_spi_start_interface(interface, CVMX_SPI_MODE_DUPLEX,
+                                         CVMX_HELPER_SPI_TIMEOUT, num_ports);
+                if (cvmx_spi4000_is_present(interface))
+                        cvmx_spi4000_initialize(interface);
+        }
+        __cvmx_interrupt_spxx_int_msk_enable(interface);
+        __cvmx_interrupt_stxx_int_msk_enable(interface);
+        __cvmx_interrupt_gmxx_enable(interface);
+        return 0;
+}
+
+/**
+ * Return the link state of an IPD/PKO port as returned by
+ * auto negotiation. The result of this function may not match
+ * Octeon's link config if auto negotiation has changed since
+ * the last call to cvmx_helper_link_set().
+ *
+ * @ipd_port: IPD/PKO port to query
+ *
+ * Returns Link state
+ */
+cvmx_helper_link_info_t __cvmx_helper_spi_link_get(int ipd_port)
+{
+        cvmx_helper_link_info_t result;
+        int interface = cvmx_helper_get_interface_num(ipd_port);
+        int index = cvmx_helper_get_interface_index_num(ipd_port);
+        result.u64 = 0;
+
+        if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) {
+                /* The simulator gives you a simulated full duplex link */
+                result.s.link_up = 1;
+                result.s.full_duplex = 1;
+                result.s.speed = 10000;
+        } else if (cvmx_spi4000_is_present(interface)) {
+                union cvmx_gmxx_rxx_rx_inbnd inband =
+                    cvmx_spi4000_check_speed(interface, index);
+                result.s.link_up = inband.s.status;
+                result.s.full_duplex = inband.s.duplex;
+                switch (inband.s.speed) {
+                case 0: /* 10 Mbps */
+                        result.s.speed = 10;
+                        break;
+                case 1: /* 100 Mbps */
+                        result.s.speed = 100;
+                        break;
+                case 2: /* 1 Gbps */
+                        result.s.speed = 1000;
+                        break;
+                case 3: /* Illegal */
+                        result.s.speed = 0;
+                        result.s.link_up = 0;
+                        break;
+                }
+        } else {
+                /* For generic SPI we can't determine the link, just return some
+                   sane results */
+                result.s.link_up = 1;
+                result.s.full_duplex = 1;
+                result.s.speed = 10000;
+        }
+        return result;
+}
+
+/**
+ * Configure an IPD/PKO port for the specified link state. This
+ * function does not influence auto negotiation at the PHY level.
+ * The passed link state must always match the link state returned
+ * by cvmx_helper_link_get(). It is normally best to use
+ * cvmx_helper_link_autoconf() instead.
+ *
+ * @ipd_port:  IPD/PKO port to configure
+ * @link_info: The new link state
+ *
+ * Returns Zero on success, negative on failure
+ */
+int __cvmx_helper_spi_link_set(int ipd_port, cvmx_helper_link_info_t link_info)
+{
+        /* Nothing to do. If we have a SPI4000 then the setup was already performed
+           by cvmx_spi4000_check_speed(). If not then there isn't any link
+           info */
+        return 0;
+}