drivers/net/dsa/mv88e6123_61_65.c

   1 /*
   2  * net/dsa/mv88e6123_61_65.c - Marvell 88e6123/6161/6165 switch chip support
   3  * Copyright (c) 2008-2009 Marvell Semiconductor
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #include <linux/delay.h>
  12 #include <linux/jiffies.h>
  13 #include <linux/list.h>
  14 #include <linux/module.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/phy.h>
  17 #include <net/dsa.h>
  18 #include "mv88e6xxx.h"
  19
  20 static char *mv88e6123_61_65_probe(struct device *host_dev, int sw_addr)
  21 {
  22         struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev);
  23         int ret;
  24
  25         if (bus == NULL)
  26                 return NULL;
  27
  28         ret = __mv88e6xxx_reg_read(bus, sw_addr, REG_PORT(0), PORT_SWITCH_ID);
  29         if (ret >= 0) {
  30                 if (ret == PORT_SWITCH_ID_6123_A1)
  31                         return "Marvell 88E6123 (A1)";
  32                 if (ret == PORT_SWITCH_ID_6123_A2)
  33                         return "Marvell 88E6123 (A2)";
  34                 if ((ret & 0xfff0) == PORT_SWITCH_ID_6123)
  35                         return "Marvell 88E6123";
  36
  37                 if (ret == PORT_SWITCH_ID_6161_A1)
  38                         return "Marvell 88E6161 (A1)";
  39                 if (ret == PORT_SWITCH_ID_6161_A2)
  40                         return "Marvell 88E6161 (A2)";
  41                 if ((ret & 0xfff0) == PORT_SWITCH_ID_6161)
  42                         return "Marvell 88E6161";
  43
  44                 if (ret == PORT_SWITCH_ID_6165_A1)
  45                         return "Marvell 88E6165 (A1)";
  46                 if (ret == PORT_SWITCH_ID_6165_A2)
  47                         return "Marvell 88e6165 (A2)";
  48                 if ((ret & 0xfff0) == PORT_SWITCH_ID_6165)
  49                         return "Marvell 88E6165";
  50         }
  51
  52         return NULL;
  53 }
  54
  55 static int mv88e6123_61_65_setup_global(struct dsa_switch *ds)
  56 {
  57         u32 upstream_port = dsa_upstream_port(ds);
  58         int ret;
  59         u32 reg;
  60
  61         ret = mv88e6xxx_setup_global(ds);
  62         if (ret)
  63                 return ret;
  64
  65         /* Disable the PHY polling unit (since there won't be any
  66          * external PHYs to poll), don't discard packets with
  67          * excessive collisions, and mask all interrupt sources.
  68          */
  69         REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, 0x0000);
  70
  71         /* Configure the upstream port, and configure the upstream
  72          * port as the port to which ingress and egress monitor frames
  73          * are to be sent.
  74          */
  75         reg = upstream_port << GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT |
  76                 upstream_port << GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT |
  77                 upstream_port << GLOBAL_MONITOR_CONTROL_ARP_SHIFT;
  78         REG_WRITE(REG_GLOBAL, GLOBAL_MONITOR_CONTROL, reg);
  79
  80         /* Disable remote management for now, and set the switch's
  81          * DSA device number.
  82          */
  83         REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL_2, ds->index & 0x1f);
  84
  85         return 0;
  86 }
  87
  88 static int mv88e6123_61_65_setup(struct dsa_switch *ds)
  89 {
  90         struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
  91         int ret;
  92
  93         ret = mv88e6xxx_setup_common(ds);
  94         if (ret < 0)
  95                 return ret;
  96
  97         switch (ps->id) {
  98         case PORT_SWITCH_ID_6123:
  99                 ps->num_ports = 3;
 100                 break;
 101         case PORT_SWITCH_ID_6161:
 102         case PORT_SWITCH_ID_6165:
 103                 ps->num_ports = 6;
 104                 break;
 105         default:
 106                 return -ENODEV;
 107         }
 108
 109         ret = mv88e6xxx_switch_reset(ds, false);
 110         if (ret < 0)
 111                 return ret;
 112
 113         ret = mv88e6123_61_65_setup_global(ds);
 114         if (ret < 0)
 115                 return ret;
 116
 117         return mv88e6xxx_setup_ports(ds);
 118 }
 119
 120 struct dsa_switch_driver mv88e6123_61_65_switch_driver = {
 121         .tag_protocol           = DSA_TAG_PROTO_EDSA,
 122         .priv_size              = sizeof(struct mv88e6xxx_priv_state),
 123         .probe                  = mv88e6123_61_65_probe,
 124         .setup                  = mv88e6123_61_65_setup,
 125         .set_addr               = mv88e6xxx_set_addr_indirect,
 126         .phy_read               = mv88e6xxx_phy_read,
 127         .phy_write              = mv88e6xxx_phy_write,
 128         .poll_link              = mv88e6xxx_poll_link,
 129         .get_strings            = mv88e6xxx_get_strings,
 130         .get_ethtool_stats      = mv88e6xxx_get_ethtool_stats,
 131         .get_sset_count         = mv88e6xxx_get_sset_count,
 132 #ifdef CONFIG_NET_DSA_HWMON
 133         .get_temp               = mv88e6xxx_get_temp,
 134 #endif
 135         .get_regs_len           = mv88e6xxx_get_regs_len,
 136         .get_regs               = mv88e6xxx_get_regs,
 137 };
 138
 139 MODULE_ALIAS("platform:mv88e6123");
 140 MODULE_ALIAS("platform:mv88e6161");
 141 MODULE_ALIAS("platform:mv88e6165");