drivers/net/dsa/mv88e6352.c

   1 /*
   2  * net/dsa/mv88e6352.c - Marvell 88e6352 switch chip support
   3  *
   4  * Copyright (c) 2014 Guenter Roeck
   5  *
   6  * Derived from mv88e6123_61_65.c
   7  * Copyright (c) 2008-2009 Marvell Semiconductor
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/jiffies.h>
  17 #include <linux/list.h>
  18 #include <linux/module.h>
  19 #include <linux/netdevice.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/phy.h>
  22 #include <net/dsa.h>
  23 #include "mv88e6xxx.h"
  24
  25 static const struct mv88e6xxx_switch_id mv88e6352_table[] = {
  26         { PORT_SWITCH_ID_6172, "Marvell 88E6172" },
  27         { PORT_SWITCH_ID_6176, "Marvell 88E6176" },
  28         { PORT_SWITCH_ID_6240, "Marvell 88E6240" },
  29         { PORT_SWITCH_ID_6320, "Marvell 88E6320" },
  30         { PORT_SWITCH_ID_6320_A1, "Marvell 88E6320 (A1)" },
  31         { PORT_SWITCH_ID_6320_A2, "Marvell 88e6320 (A2)" },
  32         { PORT_SWITCH_ID_6321, "Marvell 88E6321" },
  33         { PORT_SWITCH_ID_6321_A1, "Marvell 88E6321 (A1)" },
  34         { PORT_SWITCH_ID_6321_A2, "Marvell 88e6321 (A2)" },
  35         { PORT_SWITCH_ID_6352, "Marvell 88E6352" },
  36         { PORT_SWITCH_ID_6352_A0, "Marvell 88E6352 (A0)" },
  37         { PORT_SWITCH_ID_6352_A1, "Marvell 88E6352 (A1)" },
  38 };
  39
  40 static char *mv88e6352_drv_probe(struct device *dsa_dev,
  41                                  struct device *host_dev,
  42                                  int sw_addr, void **priv)
  43 {
  44         return mv88e6xxx_drv_probe(dsa_dev, host_dev, sw_addr, priv,
  45                                    mv88e6352_table,
  46                                    ARRAY_SIZE(mv88e6352_table));
  47 }
  48
  49 static int mv88e6352_setup_global(struct dsa_switch *ds)
  50 {
  51         u32 upstream_port = dsa_upstream_port(ds);
  52         int ret;
  53         u32 reg;
  54
  55         ret = mv88e6xxx_setup_global(ds);
  56         if (ret)
  57                 return ret;
  58
  59         /* Discard packets with excessive collisions,
  60          * mask all interrupt sources, enable PPU (bit 14, undocumented).
  61          */
  62         REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL,
  63                   GLOBAL_CONTROL_PPU_ENABLE | GLOBAL_CONTROL_DISCARD_EXCESS);
  64
  65         /* Configure the upstream port, and configure the upstream
  66          * port as the port to which ingress and egress monitor frames
  67          * are to be sent.
  68          */
  69         reg = upstream_port << GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT |
  70                 upstream_port << GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT |
  71                 upstream_port << GLOBAL_MONITOR_CONTROL_ARP_SHIFT;
  72         REG_WRITE(REG_GLOBAL, GLOBAL_MONITOR_CONTROL, reg);
  73
  74         /* Disable remote management for now, and set the switch's
  75          * DSA device number.
  76          */
  77         REG_WRITE(REG_GLOBAL, 0x1c, ds->index & 0x1f);
  78
  79         return 0;
  80 }
  81
  82 static int mv88e6352_setup(struct dsa_switch *ds)
  83 {
  84         struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
  85         int ret;
  86
  87         ps->ds = ds;
  88
  89         ret = mv88e6xxx_setup_common(ds);
  90         if (ret < 0)
  91                 return ret;
  92
  93         ps->num_ports = 7;
  94
  95         mutex_init(&ps->eeprom_mutex);
  96
  97         ret = mv88e6xxx_switch_reset(ds, true);
  98         if (ret < 0)
  99                 return ret;
 100
 101         ret = mv88e6352_setup_global(ds);
 102         if (ret < 0)
 103                 return ret;
 104
 105         return mv88e6xxx_setup_ports(ds);
 106 }
 107
 108 static int mv88e6352_read_eeprom_word(struct dsa_switch *ds, int addr)
 109 {
 110         struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 111         int ret;
 112
 113         mutex_lock(&ps->eeprom_mutex);
 114
 115         ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
 116                                   GLOBAL2_EEPROM_OP_READ |
 117                                   (addr & GLOBAL2_EEPROM_OP_ADDR_MASK));
 118         if (ret < 0)
 119                 goto error;
 120
 121         ret = mv88e6xxx_eeprom_busy_wait(ds);
 122         if (ret < 0)
 123                 goto error;
 124
 125         ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA);
 126 error:
 127         mutex_unlock(&ps->eeprom_mutex);
 128         return ret;
 129 }
 130
 131 static int mv88e6352_get_eeprom(struct dsa_switch *ds,
 132                                 struct ethtool_eeprom *eeprom, u8 *data)
 133 {
 134         int offset;
 135         int len;
 136         int ret;
 137
 138         offset = eeprom->offset;
 139         len = eeprom->len;
 140         eeprom->len = 0;
 141
 142         eeprom->magic = 0xc3ec4951;
 143
 144         ret = mv88e6xxx_eeprom_load_wait(ds);
 145         if (ret < 0)
 146                 return ret;
 147
 148         if (offset & 1) {
 149                 int word;
 150
 151                 word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 152                 if (word < 0)
 153                         return word;
 154
 155                 *data++ = (word >> 8) & 0xff;
 156
 157                 offset++;
 158                 len--;
 159                 eeprom->len++;
 160         }
 161
 162         while (len >= 2) {
 163                 int word;
 164
 165                 word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 166                 if (word < 0)
 167                         return word;
 168
 169                 *data++ = word & 0xff;
 170                 *data++ = (word >> 8) & 0xff;
 171
 172                 offset += 2;
 173                 len -= 2;
 174                 eeprom->len += 2;
 175         }
 176
 177         if (len) {
 178                 int word;
 179
 180                 word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 181                 if (word < 0)
 182                         return word;
 183
 184                 *data++ = word & 0xff;
 185
 186                 offset++;
 187                 len--;
 188                 eeprom->len++;
 189         }
 190
 191         return 0;
 192 }
 193
 194 static int mv88e6352_eeprom_is_readonly(struct dsa_switch *ds)
 195 {
 196         int ret;
 197
 198         ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP);
 199         if (ret < 0)
 200                 return ret;
 201
 202         if (!(ret & GLOBAL2_EEPROM_OP_WRITE_EN))
 203                 return -EROFS;
 204
 205         return 0;
 206 }
 207
 208 static int mv88e6352_write_eeprom_word(struct dsa_switch *ds, int addr,
 209                                        u16 data)
 210 {
 211         struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 212         int ret;
 213
 214         mutex_lock(&ps->eeprom_mutex);
 215
 216         ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA, data);
 217         if (ret < 0)
 218                 goto error;
 219
 220         ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
 221                                   GLOBAL2_EEPROM_OP_WRITE |
 222                                   (addr & GLOBAL2_EEPROM_OP_ADDR_MASK));
 223         if (ret < 0)
 224                 goto error;
 225
 226         ret = mv88e6xxx_eeprom_busy_wait(ds);
 227 error:
 228         mutex_unlock(&ps->eeprom_mutex);
 229         return ret;
 230 }
 231
 232 static int mv88e6352_set_eeprom(struct dsa_switch *ds,
 233                                 struct ethtool_eeprom *eeprom, u8 *data)
 234 {
 235         int offset;
 236         int ret;
 237         int len;
 238
 239         if (eeprom->magic != 0xc3ec4951)
 240                 return -EINVAL;
 241
 242         ret = mv88e6352_eeprom_is_readonly(ds);
 243         if (ret)
 244                 return ret;
 245
 246         offset = eeprom->offset;
 247         len = eeprom->len;
 248         eeprom->len = 0;
 249
 250         ret = mv88e6xxx_eeprom_load_wait(ds);
 251         if (ret < 0)
 252                 return ret;
 253
 254         if (offset & 1) {
 255                 int word;
 256
 257                 word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 258                 if (word < 0)
 259                         return word;
 260
 261                 word = (*data++ << 8) | (word & 0xff);
 262
 263                 ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
 264                 if (ret < 0)
 265                         return ret;
 266
 267                 offset++;
 268                 len--;
 269                 eeprom->len++;
 270         }
 271
 272         while (len >= 2) {
 273                 int word;
 274
 275                 word = *data++;
 276                 word |= *data++ << 8;
 277
 278                 ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
 279                 if (ret < 0)
 280                         return ret;
 281
 282                 offset += 2;
 283                 len -= 2;
 284                 eeprom->len += 2;
 285         }
 286
 287         if (len) {
 288                 int word;
 289
 290                 word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 291                 if (word < 0)
 292                         return word;
 293
 294                 word = (word & 0xff00) | *data++;
 295
 296                 ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
 297                 if (ret < 0)
 298                         return ret;
 299
 300                 offset++;
 301                 len--;
 302                 eeprom->len++;
 303         }
 304
 305         return 0;
 306 }
 307
 308 struct dsa_switch_driver mv88e6352_switch_driver = {
 309         .tag_protocol           = DSA_TAG_PROTO_EDSA,
 310         .probe                  = mv88e6352_drv_probe,
 311         .setup                  = mv88e6352_setup,
 312         .set_addr               = mv88e6xxx_set_addr_indirect,
 313         .phy_read               = mv88e6xxx_phy_read_indirect,
 314         .phy_write              = mv88e6xxx_phy_write_indirect,
 315         .get_strings            = mv88e6xxx_get_strings,
 316         .get_ethtool_stats      = mv88e6xxx_get_ethtool_stats,
 317         .get_sset_count         = mv88e6xxx_get_sset_count,
 318         .adjust_link            = mv88e6xxx_adjust_link,
 319         .set_eee                = mv88e6xxx_set_eee,
 320         .get_eee                = mv88e6xxx_get_eee,
 321 #ifdef CONFIG_NET_DSA_HWMON
 322         .get_temp               = mv88e6xxx_get_temp,
 323         .get_temp_limit         = mv88e6xxx_get_temp_limit,
 324         .set_temp_limit         = mv88e6xxx_set_temp_limit,
 325         .get_temp_alarm         = mv88e6xxx_get_temp_alarm,
 326 #endif
 327         .get_eeprom             = mv88e6352_get_eeprom,
 328         .set_eeprom             = mv88e6352_set_eeprom,
 329         .get_regs_len           = mv88e6xxx_get_regs_len,
 330         .get_regs               = mv88e6xxx_get_regs,
 331         .port_bridge_join       = mv88e6xxx_port_bridge_join,
 332         .port_bridge_leave      = mv88e6xxx_port_bridge_leave,
 333         .port_stp_state_set     = mv88e6xxx_port_stp_state_set,
 334         .port_vlan_filtering    = mv88e6xxx_port_vlan_filtering,
 335         .port_vlan_prepare      = mv88e6xxx_port_vlan_prepare,
 336         .port_vlan_add          = mv88e6xxx_port_vlan_add,
 337         .port_vlan_del          = mv88e6xxx_port_vlan_del,
 338         .port_vlan_dump         = mv88e6xxx_port_vlan_dump,
 339         .port_fdb_prepare       = mv88e6xxx_port_fdb_prepare,
 340         .port_fdb_add           = mv88e6xxx_port_fdb_add,
 341         .port_fdb_del           = mv88e6xxx_port_fdb_del,
 342         .port_fdb_dump          = mv88e6xxx_port_fdb_dump,
 343 };
 344
 345 MODULE_ALIAS("platform:mv88e6172");
 346 MODULE_ALIAS("platform:mv88e6176");
 347 MODULE_ALIAS("platform:mv88e6320");
 348 MODULE_ALIAS("platform:mv88e6321");
 349 MODULE_ALIAS("platform:mv88e6352");