drivers/staging/octeon/cvmx-interrupt-rsl.c

   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  * Utility functions to decode Octeon's RSL_INT_BLOCKS
  30  * interrupts into error messages.
  31  */
  32
  33 #include <asm/octeon/octeon.h>
  34
  35 #include "cvmx-asxx-defs.h"
  36 #include "cvmx-gmxx-defs.h"
  37
  38 #ifndef PRINT_ERROR
  39 #define PRINT_ERROR(format, ...)
  40 #endif
  41
  42 void __cvmx_interrupt_gmxx_rxx_int_en_enable(int index, int block);
  43
  44 /**
  45  * Enable ASX error interrupts that exist on CN3XXX, CN50XX, and
  46  * CN58XX.
  47  *
  48  * @block:  Interface to enable 0-1
  49  */
  50 void __cvmx_interrupt_asxx_enable(int block)
  51 {
  52         int mask;
  53         union cvmx_asxx_int_en csr;
  54         /*
  55          * CN38XX and CN58XX have two interfaces with 4 ports per
  56          * interface. All other chips have a max of 3 ports on
  57          * interface 0
  58          */
  59         if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
  60                 mask = 0xf;     /* Set enables for 4 ports */
  61         else
  62                 mask = 0x7;     /* Set enables for 3 ports */
  63
  64         /* Enable interface interrupts */
  65         csr.u64 = cvmx_read_csr(CVMX_ASXX_INT_EN(block));
  66         csr.s.txpsh = mask;
  67         csr.s.txpop = mask;
  68         csr.s.ovrflw = mask;
  69         cvmx_write_csr(CVMX_ASXX_INT_EN(block), csr.u64);
  70 }
  71 /**
  72  * Enable GMX error reporting for the supplied interface
  73  *
  74  * @interface: Interface to enable
  75  */
  76 void __cvmx_interrupt_gmxx_enable(int interface)
  77 {
  78         union cvmx_gmxx_inf_mode mode;
  79         union cvmx_gmxx_tx_int_en gmx_tx_int_en;
  80         int num_ports;
  81         int index;
  82
  83         mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
  84
  85         if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN52XX)) {
  86                 if (mode.s.en) {
  87                         switch (mode.cn56xx.mode) {
  88                         case 1: /* XAUI */
  89                                 num_ports = 1;
  90                                 break;
  91                         case 2: /* SGMII */
  92                         case 3: /* PICMG */
  93                                 num_ports = 4;
  94                                 break;
  95                         default:        /* Disabled */
  96                                 num_ports = 0;
  97                                 break;
  98                         }
  99                 } else
 100                         num_ports = 0;
 101         } else {
 102                 if (mode.s.en) {
 103                         if (OCTEON_IS_MODEL(OCTEON_CN38XX)
 104                             || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
 105                                 /*
 106                                  * SPI on CN38XX and CN58XX report all
 107                                  * errors through port 0.  RGMII needs
 108                                  * to check all 4 ports
 109                                  */
 110                                 if (mode.s.type)
 111                                         num_ports = 1;
 112                                 else
 113                                         num_ports = 4;
 114                         } else {
 115                                 /*
 116                                  * CN30XX, CN31XX, and CN50XX have two
 117                                  * or three ports. GMII and MII has 2,
 118                                  * RGMII has three
 119                                  */
 120                                 if (mode.s.type)
 121                                         num_ports = 2;
 122                                 else
 123                                         num_ports = 3;
 124                         }
 125                 } else
 126                         num_ports = 0;
 127         }
 128
 129         gmx_tx_int_en.u64 = 0;
 130         if (num_ports) {
 131                 if (OCTEON_IS_MODEL(OCTEON_CN38XX)
 132                     || OCTEON_IS_MODEL(OCTEON_CN58XX))
 133                         gmx_tx_int_en.s.ncb_nxa = 1;
 134                 gmx_tx_int_en.s.pko_nxa = 1;
 135         }
 136         gmx_tx_int_en.s.undflw = (1 << num_ports) - 1;
 137         cvmx_write_csr(CVMX_GMXX_TX_INT_EN(interface), gmx_tx_int_en.u64);
 138         for (index = 0; index < num_ports; index++)
 139                 __cvmx_interrupt_gmxx_rxx_int_en_enable(index, interface);
 140 }