target/linux/generic-2.6/files/drivers/net/phy/ip175c.c

   1 /*
   2  * swconfig-ip175c.c: Swconfig configuration for IC+ IP175C switch
   3  *
   4  * Copyright (C) 2008 Patrick Horn <patrick.horn@gmail.com>
   5  * Copyright (C) 2008 Martin Mares <mj@ucw.cz>
   6  * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/list.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/mii.h>
  25 #include <linux/phy.h>
  26 #include <linux/delay.h>
  27 #include <linux/switch.h>
  28 #include <linux/device.h>
  29
  30 #define MAX_VLANS 16
  31 #define MAX_PORTS 9
  32 #undef DUMP_MII_IO
  33
  34 typedef struct ip175c_reg {
  35         u16 p;                  // phy
  36         u16 m;                  // mii
  37 } reg;
  38 typedef char bitnum;
  39
  40 #define NOTSUPPORTED {-1,-1}
  41
  42 #define REG_SUPP(x) (((x).m != ((u16)-1)) && ((x).p != (u16)-1))
  43
  44 struct ip175c_state;
  45
  46 /*********** CONSTANTS ***********/
  47 struct register_mappings {
  48         char *NAME;
  49         u16 MODEL_NO;                   // Compare to bits 4-9 of MII register 0,3.
  50         bitnum NUM_PORTS;
  51         bitnum CPU_PORT;
  52
  53 /* The default VLAN for each port.
  54          Default: 0x0001 for Ports 0,1,2,3
  55                   0x0002 for Ports 4,5 */
  56         reg VLAN_DEFAULT_TAG_REG[MAX_PORTS];
  57
  58 /* These ports are tagged.
  59          Default: 0x00 */
  60         reg ADD_TAG_REG;
  61         reg REMOVE_TAG_REG;
  62         bitnum ADD_TAG_BIT[MAX_PORTS];
  63 /* These ports are untagged.
  64          Default: 0x00 (i.e. do not alter any VLAN tags...)
  65          Maybe set to 0 if user disables VLANs. */
  66         bitnum REMOVE_TAG_BIT[MAX_PORTS];
  67
  68 /* Port M and Port N are on the same VLAN.
  69          Default: All ports on all VLANs. */
  70 // Use register {29, 19+N/2}
  71         reg VLAN_LOOKUP_REG;
  72 // Port 5 uses register {30, 18} but same as odd bits.
  73         reg VLAN_LOOKUP_REG_5;          // in a different register on IP175C.
  74         bitnum VLAN_LOOKUP_EVEN_BIT[MAX_PORTS];
  75         bitnum VLAN_LOOKUP_ODD_BIT[MAX_PORTS];
  76
  77 /* This VLAN corresponds to which ports.
  78          Default: 0x2f,0x30,0x3f,0x3f... */
  79         reg TAG_VLAN_MASK_REG;
  80         bitnum TAG_VLAN_MASK_EVEN_BIT[MAX_PORTS];
  81         bitnum TAG_VLAN_MASK_ODD_BIT[MAX_PORTS];
  82
  83         int RESET_VAL;
  84         reg RESET_REG;
  85
  86         reg MODE_REG;
  87         int MODE_VAL;
  88
  89 /* General flags */
  90         reg ROUTER_CONTROL_REG;
  91         reg VLAN_CONTROL_REG;
  92         bitnum TAG_VLAN_BIT;
  93         bitnum ROUTER_EN_BIT;
  94         bitnum NUMLAN_GROUPS_MAX;
  95         bitnum NUMLAN_GROUPS_BIT;
  96
  97         reg MII_REGISTER_EN;
  98         bitnum MII_REGISTER_EN_BIT;
  99
 100         // set to 1 for 178C, 0 for 175C.
 101         bitnum SIMPLE_VLAN_REGISTERS;   // 175C has two vlans per register but 178C has only one.
 102
 103         // Pointers to functions which manipulate hardware state
 104         int (*get_flags)(struct ip175c_state *state);
 105         int (*get_state)(struct ip175c_state *state);
 106         int (*update_state)(struct ip175c_state *state);
 107         int (*set_vlan_mode)(struct ip175c_state *state);
 108         int (*reset)(struct ip175c_state *state);
 109 };
 110
 111 static int ip175c_get_flags(struct ip175c_state *state);
 112 static int ip175c_get_state(struct ip175c_state *state);
 113 static int ip175c_update_state(struct ip175c_state *state);
 114 static int ip175c_set_vlan_mode(struct ip175c_state *state);
 115 static int ip175c_do_reset(struct ip175c_state *state);
 116
 117 static const struct register_mappings IP178C = {
 118         .NAME = "IP178C",
 119         .MODEL_NO = 0x18,
 120         .VLAN_DEFAULT_TAG_REG = {
 121                 {30,3},{30,4},{30,5},{30,6},{30,7},{30,8},
 122                 {30,9},{30,10},{30,11},
 123         },
 124
 125         .ADD_TAG_REG = {30,12},
 126         .ADD_TAG_BIT = {0,1,2,3,4,5,6,7,8},
 127         .REMOVE_TAG_REG = {30,13},
 128         .REMOVE_TAG_BIT = {4,5,6,7,8,9,10,11,12},
 129
 130         .SIMPLE_VLAN_REGISTERS = 1,
 131
 132         .VLAN_LOOKUP_REG = {31,0},// +N
 133         .VLAN_LOOKUP_REG_5 = NOTSUPPORTED, // not used with SIMPLE_VLAN_REGISTERS
 134         .VLAN_LOOKUP_EVEN_BIT = {0,1,2,3,4,5,6,7,8},
 135         .VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,5,6,7,8},
 136
 137         .TAG_VLAN_MASK_REG = {30,14}, // +N
 138         .TAG_VLAN_MASK_EVEN_BIT = {0,1,2,3,4,5,6,7,8},
 139         .TAG_VLAN_MASK_ODD_BIT = {0,1,2,3,4,5,6,7,8},
 140
 141         .RESET_VAL = 0x55AA,
 142         .RESET_REG = {30,0},
 143         .MODE_VAL = 0,
 144         .MODE_REG = NOTSUPPORTED,
 145
 146         .ROUTER_CONTROL_REG = {30,30},
 147         .ROUTER_EN_BIT = 11,
 148         .NUMLAN_GROUPS_MAX = 8,
 149         .NUMLAN_GROUPS_BIT = 8, // {0-2}
 150
 151         .VLAN_CONTROL_REG = {30,13},
 152         .TAG_VLAN_BIT = 3,
 153
 154         .CPU_PORT = 8,
 155         .NUM_PORTS = 9,
 156
 157         .MII_REGISTER_EN = NOTSUPPORTED,
 158
 159         .get_flags = ip175c_get_flags,
 160         .get_state = ip175c_get_state,
 161         .update_state = ip175c_update_state,
 162         .set_vlan_mode = ip175c_set_vlan_mode,
 163         .reset = ip175c_do_reset,
 164 };
 165
 166 static const struct register_mappings IP175C = {
 167         .NAME = "IP175C",
 168         .MODEL_NO = 0x18,
 169         .VLAN_DEFAULT_TAG_REG = {
 170                 {29,24},{29,25},{29,26},{29,27},{29,28},{29,30},
 171                 NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED
 172         },
 173
 174         .ADD_TAG_REG = {29,23},
 175         .REMOVE_TAG_REG = {29,23},
 176         .ADD_TAG_BIT = {11,12,13,14,15,1,-1,-1,-1},
 177         .REMOVE_TAG_BIT = {6,7,8,9,10,0,-1,-1,-1},
 178
 179         .SIMPLE_VLAN_REGISTERS = 0,
 180
 181         .VLAN_LOOKUP_REG = {29,19},// +N/2
 182         .VLAN_LOOKUP_REG_5 = {30,18},
 183         .VLAN_LOOKUP_EVEN_BIT = {8,9,10,11,12,15,-1,-1,-1},
 184         .VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,7,-1,-1,-1},
 185
 186         .TAG_VLAN_MASK_REG = {30,1}, // +N/2
 187         .TAG_VLAN_MASK_EVEN_BIT = {0,1,2,3,4,5,-1,-1,-1},
 188         .TAG_VLAN_MASK_ODD_BIT = {8,9,10,11,12,13,-1,-1,-1},
 189
 190         .RESET_VAL = 0x175C,
 191         .RESET_REG = {30,0},
 192         .MODE_VAL = 0x175C,
 193         .MODE_REG = {29,31},
 194
 195         .ROUTER_CONTROL_REG = {30,9},
 196         .ROUTER_EN_BIT = 3,
 197         .NUMLAN_GROUPS_MAX = 8,
 198         .NUMLAN_GROUPS_BIT = 0, // {0-2}
 199
 200         .VLAN_CONTROL_REG = {30,9},
 201         .TAG_VLAN_BIT = 7,
 202
 203         .NUM_PORTS = 6,
 204         .CPU_PORT = 5,
 205
 206         .MII_REGISTER_EN = NOTSUPPORTED,
 207
 208         .get_flags = ip175c_get_flags,
 209         .get_state = ip175c_get_state,
 210         .update_state = ip175c_update_state,
 211         .set_vlan_mode = ip175c_set_vlan_mode,
 212         .reset = ip175c_do_reset,
 213 };
 214
 215 static const struct register_mappings IP175A = {
 216         .NAME = "IP175A",
 217         .MODEL_NO = 0x05,
 218         .VLAN_DEFAULT_TAG_REG = {
 219                 {0,24},{0,25},{0,26},{0,27},{0,28},NOTSUPPORTED,
 220                 NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED
 221         },
 222
 223         .ADD_TAG_REG = {0,23},
 224         .REMOVE_TAG_REG = {0,23},
 225         .ADD_TAG_BIT = {11,12,13,14,15,-1,-1,-1,-1},
 226         .REMOVE_TAG_BIT = {6,7,8,9,10,-1,-1,-1,-1},
 227
 228         .SIMPLE_VLAN_REGISTERS = 0,
 229
 230         // Only programmable via EEPROM
 231         .VLAN_LOOKUP_REG = NOTSUPPORTED,// +N/2
 232         .VLAN_LOOKUP_REG_5 = NOTSUPPORTED,
 233         .VLAN_LOOKUP_EVEN_BIT = {8,9,10,11,12,-1,-1,-1,-1},
 234         .VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,-1,-1,-1,-1},
 235
 236         .TAG_VLAN_MASK_REG = NOTSUPPORTED, // +N/2,
 237         .TAG_VLAN_MASK_EVEN_BIT = {-1,-1,-1,-1,-1,-1,-1,-1,-1},
 238         .TAG_VLAN_MASK_ODD_BIT = {-1,-1,-1,-1,-1,-1,-1,-1,-1},
 239
 240         .RESET_VAL = -1,
 241         .RESET_REG = NOTSUPPORTED,
 242         .MODE_VAL = 0,
 243         .MODE_REG = NOTSUPPORTED,
 244
 245         .ROUTER_CONTROL_REG = NOTSUPPORTED,
 246         .VLAN_CONTROL_REG = NOTSUPPORTED,
 247         .TAG_VLAN_BIT = -1,
 248         .ROUTER_EN_BIT = -1,
 249         .NUMLAN_GROUPS_MAX = -1,
 250         .NUMLAN_GROUPS_BIT = -1, // {0-2}
 251
 252         .NUM_PORTS = 5,
 253         .CPU_PORT = 4,
 254
 255         .MII_REGISTER_EN = {0, 18},
 256         .MII_REGISTER_EN_BIT = 7,
 257
 258         .get_flags = ip175c_get_flags,
 259         .get_state = ip175c_get_state,
 260         .update_state = ip175c_update_state,
 261         .set_vlan_mode = ip175c_set_vlan_mode,
 262         .reset = ip175c_do_reset,
 263 };
 264
 265
 266 static int ip175d_get_flags(struct ip175c_state *state);
 267 static int ip175d_get_state(struct ip175c_state *state);
 268 static int ip175d_update_state(struct ip175c_state *state);
 269 static int ip175d_set_vlan_mode(struct ip175c_state *state);
 270 static int ip175d_reset(struct ip175c_state *state);
 271
 272 static const struct register_mappings IP175D = {
 273         .NAME = "IP175D",
 274         .MODEL_NO = 0x18,
 275
 276         // The IP175D has a completely different interface, so we leave most
 277         // of the registers undefined and switch to different code paths.
 278
 279         .VLAN_DEFAULT_TAG_REG = {
 280                 NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED,
 281                 NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED,
 282         },
 283
 284         .ADD_TAG_REG = NOTSUPPORTED,
 285         .REMOVE_TAG_REG = NOTSUPPORTED,
 286
 287         .SIMPLE_VLAN_REGISTERS = 0,
 288
 289         .VLAN_LOOKUP_REG = NOTSUPPORTED,
 290         .VLAN_LOOKUP_REG_5 = NOTSUPPORTED,
 291         .TAG_VLAN_MASK_REG = NOTSUPPORTED,
 292
 293         .RESET_VAL = 0x175D,
 294         .RESET_REG = {20,2},
 295         .MODE_REG = NOTSUPPORTED,
 296
 297         .ROUTER_CONTROL_REG = NOTSUPPORTED,
 298         .ROUTER_EN_BIT = -1,
 299         .NUMLAN_GROUPS_BIT = -1,
 300
 301         .VLAN_CONTROL_REG = NOTSUPPORTED,
 302         .TAG_VLAN_BIT = -1,
 303
 304         .NUM_PORTS = 6,
 305         .CPU_PORT = 5,
 306
 307         .MII_REGISTER_EN = NOTSUPPORTED,
 308
 309         .get_flags = ip175d_get_flags,
 310         .get_state = ip175d_get_state,
 311         .update_state = ip175d_update_state,
 312         .set_vlan_mode = ip175d_set_vlan_mode,
 313         .reset = ip175d_reset,
 314 };
 315
 316 struct ip175c_state {
 317         struct switch_dev dev;
 318         struct mii_bus *mii_bus;
 319         bool registered;
 320
 321         int router_mode;                // ROUTER_EN
 322         int vlan_enabled;               // TAG_VLAN_EN
 323         struct port_state {
 324                 u16 pvid;
 325                 unsigned int shareports;
 326         } ports[MAX_PORTS];
 327         unsigned int add_tag;
 328         unsigned int remove_tag;
 329         int num_vlans;
 330         struct vlan_state {
 331                 unsigned int ports;
 332                 unsigned int tag;       // VLAN tag (IP175D only)
 333         } vlans[MAX_VLANS];
 334         const struct register_mappings *regs;
 335         reg proc_mii;   // phy/reg for the low level register access via swconfig
 336
 337         char buf[80];
 338 };
 339
 340
 341 static int ip_phy_read(struct ip175c_state *state, int port, int reg)
 342 {
 343         int val = mdiobus_read(state->mii_bus, port, reg);
 344         if (val < 0)
 345                 pr_warning("IP175C: Unable to get MII register %d,%d: error %d\n", port, reg, -val);
 346 #ifdef DUMP_MII_IO
 347         else
 348                 pr_debug("IP175C: Read MII(%d,%d) -> %04x\n", port, reg, val);
 349 #endif
 350         return val;
 351 }
 352
 353 static int ip_phy_write(struct ip175c_state *state, int port, int reg, u16 val)
 354 {
 355         int err;
 356
 357 #ifdef DUMP_MII_IO
 358         pr_debug("IP175C: Write MII(%d,%d) <- %04x\n", port, reg, val);
 359 #endif
 360         err = mdiobus_write(state->mii_bus, port, reg, val);
 361         if (err < 0)
 362                 pr_warning("IP175C: Unable to write MII register %d,%d: error %d\n", port, reg, -err);
 363         return err;
 364 }
 365
 366 static int ip_phy_write_masked(struct ip175c_state *state, int port, int reg, unsigned int mask, unsigned int data)
 367 {
 368         int val = ip_phy_read(state, port, reg);
 369         if (val < 0)
 370                 return 0;
 371         return ip_phy_write(state, port, reg, (val & ~mask) | data);
 372 }
 373
 374 static int getPhy(struct ip175c_state *state, reg mii)
 375 {
 376         if (!REG_SUPP(mii))
 377                 return -EFAULT;
 378         return ip_phy_read(state, mii.p, mii.m);
 379 }
 380
 381 static int setPhy(struct ip175c_state *state, reg mii, u16 value)
 382 {
 383         int err;
 384
 385         if (!REG_SUPP(mii))
 386                 return -EFAULT;
 387         err = ip_phy_write(state, mii.p, mii.m, value);
 388         if (err < 0)
 389                 return err;
 390         getPhy(state, mii);
 391         return 0;
 392 }
 393
 394
 395 /**
 396  * These two macros are to simplify the mapping of logical bits to the bits in hardware.
 397  * NOTE: these macros will return if there is an error!
 398  */
 399
 400 #define GET_PORT_BITS(state, bits, addr, bit_lookup)            \
 401         do {                                                    \
 402                 int i, val = getPhy((state), (addr));           \
 403                 if (val < 0)                                    \
 404                         return val;                             \
 405                 (bits) = 0;                                     \
 406                 for (i = 0; i < MAX_PORTS; i++) {               \
 407                         if ((bit_lookup)[i] == -1) continue;    \
 408                         if (val & (1<<(bit_lookup)[i]))         \
 409                                 (bits) |= (1<<i);               \
 410                 }                                               \
 411         } while (0)
 412
 413 #define SET_PORT_BITS(state, bits, addr, bit_lookup)            \
 414         do {                                                    \
 415                 int i, val = getPhy((state), (addr));           \
 416                 if (val < 0)                                    \
 417                         return val;                             \
 418                 for (i = 0; i < MAX_PORTS; i++) {               \
 419                         unsigned int newmask = ((bits)&(1<<i)); \
 420                         if ((bit_lookup)[i] == -1) continue;    \
 421                         val &= ~(1<<(bit_lookup)[i]);           \
 422                         val |= ((newmask>>i)<<(bit_lookup)[i]); \
 423                 }                                               \
 424                 val = setPhy((state), (addr), val);             \
 425                 if (val < 0)                                    \
 426                         return val;                             \
 427         } while (0)
 428
 429
 430 static int get_model(struct ip175c_state *state)
 431 {
 432         int id1, id2;
 433         int oui_id, model_no, rev_no, chip_no;
 434
 435         id1 = ip_phy_read(state, 0, 2);
 436         id2 = ip_phy_read(state, 0, 3);
 437         oui_id = (id1 << 6) | ((id2 >> 10) & 0x3f);
 438         model_no = (id2 >> 4) & 0x3f;
 439         rev_no = id2 & 0xf;
 440         pr_debug("IP175C: Identified oui=%06x model=%02x rev=%X\n", oui_id, model_no, rev_no);
 441
 442         if (oui_id != 0x0090c3)  // No other oui_id should have reached us anyway
 443                 return -ENODEV;
 444
 445         if (model_no == IP175A.MODEL_NO) {
 446                 state->regs = &IP175A;
 447         } else if (model_no == IP175C.MODEL_NO) {
 448                 /*
 449                  *  Several models share the same model_no:
 450                  *  178C has more PHYs, so we try whether the device responds to a read from PHY5
 451                  *  175D has a new chip ID register
 452                  *  175C has neither
 453                  */
 454                 if (ip_phy_read(state, 5, 2) == 0x0243) {
 455                         state->regs = &IP178C;
 456                 } else {
 457                         chip_no = ip_phy_read(state, 20, 0);
 458                         pr_debug("IP175C: Chip ID register reads %04x\n", chip_no);
 459                         if (chip_no == 0x175d) {
 460                                 state->regs = &IP175D;
 461                         } else {
 462                                 state->regs = &IP175C;
 463                         }
 464                 }
 465         } else {
 466                 pr_warning("IP175C: Found an unknown IC+ switch with model number %02x, revision %X.\n", model_no, rev_no);
 467                 return -EPERM;
 468         }
 469         return 0;
 470 }
 471
 472 /*** Low-level functions for the older models ***/
 473
 474 /** Get only the vlan and router flags on the router **/
 475 static int ip175c_get_flags(struct ip175c_state *state)
 476 {
 477         int val;
 478
 479         state->router_mode = 0;
 480         state->vlan_enabled = -1; // hack
 481         state->num_vlans = 0;
 482
 483         if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
 484                 return 0; // not an error if it doesn't support enable vlan.
 485         }
 486
 487         val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
 488         if (val < 0) {
 489                 return val;
 490         }
 491         if (state->regs->ROUTER_EN_BIT >= 0)
 492                 state->router_mode = ((val>>state->regs->ROUTER_EN_BIT) & 1);
 493
 494         if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
 495                 state->num_vlans = (val >> state->regs->NUMLAN_GROUPS_BIT);
 496                 state->num_vlans &= (state->regs->NUMLAN_GROUPS_MAX-1);
 497                 state->num_vlans+=1; // does not include WAN.
 498         }
 499
 500         val = getPhy(state, state->regs->VLAN_CONTROL_REG);
 501         if (val < 0) {
 502                 return 0;
 503         }
 504         if (state->regs->TAG_VLAN_BIT >= 0)
 505                 state->vlan_enabled = ((val>>state->regs->TAG_VLAN_BIT) & 1);
 506
 507         return  0;
 508 }
 509
 510 /** Get all state variables for VLAN mappings and port-based tagging **/
 511 static int ip175c_get_state(struct ip175c_state *state)
 512 {
 513         int i, j;
 514         int ret;
 515
 516         ret = ip175c_get_flags(state);
 517         if (ret < 0) {
 518                 return ret;
 519         }
 520
 521         GET_PORT_BITS(state, state->remove_tag,
 522                                   state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
 523         GET_PORT_BITS(state, state->add_tag,
 524                                   state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
 525
 526         if (state->vlan_enabled == -1) {
 527                 // not sure how to get this...
 528                 state->vlan_enabled = (state->remove_tag || state->add_tag);
 529         }
 530
 531         if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
 532                 for (j=0; j<MAX_PORTS; j++) {
 533                         state->ports[j].shareports = 0; // initialize them in case.
 534                 }
 535                 for (j=0; j<state->regs->NUM_PORTS; j++) {
 536                         reg addr;
 537                         const bitnum *bit_lookup = (j%2==0)?
 538                                 state->regs->VLAN_LOOKUP_EVEN_BIT:
 539                                 state->regs->VLAN_LOOKUP_ODD_BIT;
 540                         addr = state->regs->VLAN_LOOKUP_REG;
 541                         if (state->regs->SIMPLE_VLAN_REGISTERS) {
 542                                 addr.m += j;
 543                         } else {
 544                                 switch (j) {
 545                                 case 0:
 546                                 case 1:
 547                                         break;
 548                                 case 2:
 549                                 case 3:
 550                                         addr.m+=1;
 551                                         break;
 552                                 case 4:
 553                                         addr.m+=2;
 554                                         break;
 555                                 case 5:
 556                                         addr = state->regs->VLAN_LOOKUP_REG_5;
 557                                         break;
 558                                 }
 559                         }
 560
 561                         if (REG_SUPP(addr)) {
 562                                 GET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
 563                         }
 564                 }
 565         } else {
 566                 for (j=0; j<MAX_PORTS; j++) {
 567                         state->ports[j].shareports = 0xff;
 568                 }
 569         }
 570
 571         for (i=0; i<MAX_PORTS; i++) {
 572                 if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
 573                         int val = getPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i]);
 574                         if (val < 0) {
 575                                 return val;
 576                         }
 577                         state->ports[i].pvid = val;
 578                 } else {
 579                         state->ports[i].pvid = 0;
 580                 }
 581         }
 582
 583         if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
 584                 for (j=0; j<MAX_VLANS; j++) {
 585                         reg addr = state->regs->TAG_VLAN_MASK_REG;
 586                         const bitnum *bit_lookup = (j%2==0)?
 587                                 state->regs->TAG_VLAN_MASK_EVEN_BIT:
 588                                 state->regs->TAG_VLAN_MASK_ODD_BIT;
 589                         if (state->regs->SIMPLE_VLAN_REGISTERS) {
 590                                 addr.m += j;
 591                         } else {
 592                                 addr.m += j/2;
 593                         }
 594                         GET_PORT_BITS(state, state->vlans[j].ports, addr, bit_lookup);
 595                 }
 596         } else {
 597                 for (j=0; j<MAX_VLANS; j++) {
 598                         state->vlans[j].ports = 0;
 599                         for (i=0; i<state->regs->NUM_PORTS; i++) {
 600                                 if ((state->ports[i].pvid == j) ||
 601                                                 (state->ports[i].pvid == 0)) {
 602                                         state->vlans[j].ports |= (1<<i);
 603                                 }
 604                         }
 605                 }
 606         }
 607
 608         return 0;
 609 }
 610
 611 /** Only set vlan and router flags in the switch **/
 612 static int ip175c_set_flags(struct ip175c_state *state)
 613 {
 614         int val;
 615
 616         if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
 617                 return 0;
 618         }
 619
 620         val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
 621         if (val < 0) {
 622                 return val;
 623         }
 624         if (state->regs->ROUTER_EN_BIT >= 0) {
 625                 if (state->router_mode) {
 626                         val |= (1<<state->regs->ROUTER_EN_BIT);
 627                 } else {
 628                         val &= (~(1<<state->regs->ROUTER_EN_BIT));
 629                 }
 630         }
 631         if (state->regs->TAG_VLAN_BIT >= 0) {
 632                 if (state->vlan_enabled) {
 633                         val |= (1<<state->regs->TAG_VLAN_BIT);
 634                 } else {
 635                         val &= (~(1<<state->regs->TAG_VLAN_BIT));
 636                 }
 637         }
 638         if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
 639                 val &= (~((state->regs->NUMLAN_GROUPS_MAX-1)<<state->regs->NUMLAN_GROUPS_BIT));
 640                 if (state->num_vlans > state->regs->NUMLAN_GROUPS_MAX) {
 641                         val |= state->regs->NUMLAN_GROUPS_MAX << state->regs->NUMLAN_GROUPS_BIT;
 642                 } else if (state->num_vlans >= 1) {
 643                         val |= (state->num_vlans-1) << state->regs->NUMLAN_GROUPS_BIT;
 644                 }
 645         }
 646         return setPhy(state, state->regs->ROUTER_CONTROL_REG, val);
 647 }
 648
 649 /** Set all VLAN and port state.  Usually you should call "correct_vlan_state" first. **/
 650 static int ip175c_set_state(struct ip175c_state *state)
 651 {
 652         int j;
 653         int i;
 654         SET_PORT_BITS(state, state->add_tag,
 655                                   state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
 656         SET_PORT_BITS(state, state->remove_tag,
 657                                   state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
 658
 659         if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
 660                 for (j=0; j<state->regs->NUM_PORTS; j++) {
 661                         reg addr;
 662                         const bitnum *bit_lookup = (j%2==0)?
 663                                 state->regs->VLAN_LOOKUP_EVEN_BIT:
 664                                 state->regs->VLAN_LOOKUP_ODD_BIT;
 665
 666                         // duplicate code -- sorry
 667                         addr = state->regs->VLAN_LOOKUP_REG;
 668                         if (state->regs->SIMPLE_VLAN_REGISTERS) {
 669                                 addr.m += j;
 670                         } else {
 671                                 switch (j) {
 672                                 case 0:
 673                                 case 1:
 674                                         break;
 675                                 case 2:
 676                                 case 3:
 677                                         addr.m+=1;
 678                                         break;
 679                                 case 4:
 680                                         addr.m+=2;
 681                                         break;
 682                                 case 5:
 683                                         addr = state->regs->VLAN_LOOKUP_REG_5;
 684                                         break;
 685                                 default:
 686                                         addr.m = -1; // shouldn't get here, but...
 687                                         break;
 688                                 }
 689                         }
 690                         //printf("shareports for %d is %02X\n",j,state->ports[j].shareports);
 691                         if (REG_SUPP(addr)) {
 692                                 SET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
 693                         }
 694                 }
 695         }
 696         if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
 697                 for (j=0; j<MAX_VLANS; j++) {
 698                         reg addr = state->regs->TAG_VLAN_MASK_REG;
 699                         const bitnum *bit_lookup = (j%2==0)?
 700                                 state->regs->TAG_VLAN_MASK_EVEN_BIT:
 701                                 state->regs->TAG_VLAN_MASK_ODD_BIT;
 702                         unsigned int vlan_mask;
 703                         if (state->regs->SIMPLE_VLAN_REGISTERS) {
 704                                 addr.m += j;
 705                         } else {
 706                                 addr.m += j/2;
 707                         }
 708                         vlan_mask = state->vlans[j].ports;
 709                         SET_PORT_BITS(state, vlan_mask, addr, bit_lookup);
 710                 }
 711         }
 712
 713         for (i=0; i<MAX_PORTS; i++) {
 714                 if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
 715                         int err = setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i],
 716                                         state->ports[i].pvid);
 717                         if (err < 0) {
 718                                 return err;
 719                         }
 720                 }
 721         }
 722
 723         return ip175c_set_flags(state);
 724 }
 725
 726 /**
 727  *  Uses only the VLAN port mask and the add tag mask to generate the other fields:
 728  *  which ports are part of the same VLAN, removing vlan tags, and VLAN tag ids.
 729  */
 730 static void ip175c_correct_vlan_state(struct ip175c_state *state)
 731 {
 732         int i, j;
 733         state->num_vlans = 0;
 734         for (i=0; i<MAX_VLANS; i++) {
 735                 if (state->vlans[i].ports != 0) {
 736                         state->num_vlans = i+1; // Hack -- we need to store the "set" vlans somewhere...
 737                 }
 738         }
 739
 740         for (i=0; i<state->regs->NUM_PORTS; i++) {
 741                 unsigned int portmask = (1<<i);
 742                 if (!state->vlan_enabled) {
 743                         // Share with everybody!
 744                         state->ports[i].shareports = (1<<state->regs->NUM_PORTS)-1;
 745                         continue;
 746                 }
 747                 state->ports[i].shareports = portmask;
 748                 for (j=0; j<MAX_VLANS; j++) {
 749                         if (state->vlans[j].ports & portmask)
 750                                 state->ports[i].shareports |= state->vlans[j].ports;
 751                 }
 752         }
 753 }
 754
 755 static int ip175c_update_state(struct ip175c_state *state)
 756 {
 757         ip175c_correct_vlan_state(state);
 758         return ip175c_set_state(state);
 759 }
 760
 761 static int ip175c_set_vlan_mode(struct ip175c_state *state)
 762 {
 763         return ip175c_update_state(state);
 764 }
 765
 766 static int ip175c_do_reset(struct ip175c_state *state)
 767 {
 768         int err;
 769
 770         if (REG_SUPP(state->regs->MODE_REG)) {
 771                 err = setPhy(state, state->regs->MODE_REG, state->regs->MODE_VAL);
 772                 if (err < 0)
 773                         return err;
 774                 err = getPhy(state, state->regs->MODE_REG);
 775                 if (err < 0)
 776                         return err;
 777         }
 778
 779         return 0;
 780 }
 781
 782 /*** Low-level functions for IP175D ***/
 783
 784 static int ip175d_get_flags(struct ip175c_state *state)
 785 {
 786         // We keep the configuration of the switch cached, so get doesn't do anything
 787         return 0;
 788 }
 789
 790 static int ip175d_get_state(struct ip175c_state *state)
 791 {
 792         // Again, the configuration is fully cached
 793         return 0;
 794 }
 795
 796 static int ip175d_update_state(struct ip175c_state *state)
 797 {
 798         unsigned int filter_mask = 0;
 799         unsigned int ports[16], add[16], rem[16];
 800         int i, j;
 801         int err = 0;
 802
 803         for (i = 0; i < 16; i++) {
 804                 ports[i] = 0;
 805                 add[i] = 0;
 806                 rem[i] = 0;
 807                 if (!state->vlan_enabled) {
 808                         err |= ip_phy_write(state, 22, 14+i, i+1);      // default tags
 809                         ports[i] = 0x3f;
 810                         continue;
 811                 }
 812                 if (!state->vlans[i].tag) {
 813                         // Reset the filter
 814                         err |= ip_phy_write(state, 22, 14+i, 0);        // tag
 815                         continue;
 816                 }
 817                 filter_mask |= 1 << i;
 818                 err |= ip_phy_write(state, 22, 14+i, state->vlans[i].tag);
 819                 ports[i] = state->vlans[i].ports;
 820                 for (j = 0; j < 6; j++) {
 821                         if (ports[i] & (1 << j)) {
 822                                 if (state->add_tag & (1 << j))
 823                                         add[i] |= 1 << j;
 824                                 if (state->remove_tag & (1 << j))
 825                                         rem[i] |= 1 << j;
 826                         }
 827                 }
 828         }
 829
 830         // Port masks, tag adds and removals
 831         for (i = 0; i < 8; i++) {
 832                 err |= ip_phy_write(state, 23, i, ports[2*i] | (ports[2*i+1] << 8));
 833                 err |= ip_phy_write(state, 23, 8+i, add[2*i] | (add[2*i+1] << 8));
 834                 err |= ip_phy_write(state, 23, 16+i, rem[2*i] | (rem[2*i+1] << 8));
 835         }
 836         err |= ip_phy_write(state, 22, 10, filter_mask);
 837
 838         // Default VLAN tag for each port
 839         for (i = 0; i < 6; i++)
 840                 err |= ip_phy_write(state, 22, 4+i, state->vlans[state->ports[i].pvid].tag);
 841
 842         return (err ? -EIO : 0);
 843 }
 844
 845 static int ip175d_set_vlan_mode(struct ip175c_state *state)
 846 {
 847         int i;
 848         int err = 0;
 849
 850         if (state->vlan_enabled) {
 851                 // VLAN classification rules: tag-based VLANs, use VID to classify,
 852                 // drop packets that cannot be classified.
 853                 err |= ip_phy_write_masked(state, 22, 0, 0x3fff, 0x003f);
 854
 855                 // Ingress rules: CFI=1 dropped, null VID is untagged, VID=1 passed,
 856                 // VID=0xfff discarded, admin both tagged and untagged, ingress
 857                 // filters enabled.
 858                 err |= ip_phy_write_masked(state, 22, 1, 0x0fff, 0x0c3f);
 859
 860                 // Egress rules: IGMP processing off, keep VLAN header off
 861                 err |= ip_phy_write_masked(state, 22, 2, 0x0fff, 0x0000);
 862         } else {
 863                 // VLAN classification rules: everything off & clear table
 864                 err |= ip_phy_write_masked(state, 22, 0, 0xbfff, 0x8000);
 865
 866                 // Ingress and egress rules: set to defaults
 867                 err |= ip_phy_write_masked(state, 22, 1, 0x0fff, 0x0c3f);
 868                 err |= ip_phy_write_masked(state, 22, 2, 0x0fff, 0x0000);
 869         }
 870
 871         // Reset default VLAN for each port to 0
 872         for (i = 0; i < 6; i++)
 873                 state->ports[i].pvid = 0;
 874
 875         err |= ip175d_update_state(state);
 876
 877         return (err ? -EIO : 0);
 878 }
 879
 880 static int ip175d_reset(struct ip175c_state *state)
 881 {
 882         int err = 0;
 883
 884         // Disable the special tagging mode
 885         err |= ip_phy_write_masked(state, 21, 22, 0x0003, 0x0000);
 886
 887         // Set 802.1q protocol type
 888         err |= ip_phy_write(state, 22, 3, 0x8100);
 889
 890         state->vlan_enabled = 0;
 891         err |= ip175d_set_vlan_mode(state);
 892
 893         return (err ? -EIO : 0);
 894 }
 895
 896 /*** High-level functions ***/
 897
 898 static int ip175c_get_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
 899 {
 900         struct ip175c_state *state = dev->priv;
 901         int err;
 902
 903         err = state->regs->get_state(state); // May be set in get_state.
 904         if (err < 0)
 905                 return err;
 906         val->value.i = state->vlan_enabled;
 907         return 0;
 908 }
 909
 910 static void ip175c_reset_vlan_config(struct ip175c_state *state)
 911 {
 912         int i;
 913
 914         state->remove_tag = (state->vlan_enabled ? ((1<<state->regs->NUM_PORTS)-1) : 0x0000);
 915         state->add_tag = 0x0000;
 916         for (i = 0; i < MAX_VLANS; i++) {
 917                 state->vlans[i].ports = 0x0000;
 918                 state->vlans[i].tag = (i ? i : 16);
 919         }
 920         for (i = 0; i < MAX_PORTS; i++)
 921                 state->ports[i].pvid = 0;
 922 }
 923
 924 static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
 925 {
 926         struct ip175c_state *state = dev->priv;
 927         int err;
 928         int enable;
 929
 930         err = state->regs->get_state(state);
 931         if (err < 0)
 932                 return err;
 933         enable = val->value.i;
 934
 935         if (state->vlan_enabled == enable) {
 936                 // Do not change any state.
 937                 return 0;
 938         }
 939         state->vlan_enabled = enable;
 940
 941         // Otherwise, if we are switching state, set fields to a known default.
 942         ip175c_reset_vlan_config(state);
 943
 944         return state->regs->set_vlan_mode(state);
 945 }
 946
 947 static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
 948 {
 949         struct ip175c_state *state = dev->priv;
 950         int err;
 951         int b;
 952         int ind;
 953         unsigned int ports;
 954
 955         if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
 956                 return -EINVAL;
 957
 958         err = state->regs->get_state(state);
 959         if (err<0)
 960                 return err;
 961
 962         ports = state->vlans[val->port_vlan].ports;
 963         b = 0;
 964         ind = 0;
 965         while (b < MAX_PORTS) {
 966                 if (ports&1) {
 967                         int istagged = ((state->add_tag >> b) & 1);
 968                         val->value.ports[ind].id = b;
 969                         val->value.ports[ind].flags = (istagged << SWITCH_PORT_FLAG_TAGGED);
 970                         ind++;
 971                 }
 972                 b++;
 973                 ports >>= 1;
 974         }
 975         val->len = ind;
 976
 977         return 0;
 978 }
 979
 980 static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
 981 {
 982         struct ip175c_state *state = dev->priv;
 983         int i;
 984         int err;
 985
 986         if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
 987                 return -EINVAL;
 988
 989         err = state->regs->get_state(state);
 990         if (err < 0)
 991                 return err;
 992
 993         state->vlans[val->port_vlan].ports = 0;
 994         for (i = 0; i < val->len; i++) {
 995                 unsigned int bitmask = (1<<val->value.ports[i].id);
 996                 state->vlans[val->port_vlan].ports |= bitmask;
 997                 if (val->value.ports[i].flags & (1<<SWITCH_PORT_FLAG_TAGGED)) {
 998                         state->add_tag |= bitmask;
 999                         state->remove_tag &= (~bitmask);
1000                 } else {
1001                         state->add_tag &= (~bitmask);
1002                         state->remove_tag |= bitmask;
1003                 }
1004         }
1005
1006         return state->regs->update_state(state);
1007 }
1008
1009 static int ip175c_apply(struct switch_dev *dev)
1010 {
1011         struct ip175c_state *state = dev->priv;
1012         int err;
1013
1014         err = state->regs->get_flags(state);
1015         if (err < 0)
1016                 return err;
1017
1018         if (REG_SUPP(state->regs->MII_REGISTER_EN)) {
1019                 int val = getPhy(state, state->regs->MII_REGISTER_EN);
1020                 if (val < 0) {
1021                         return val;
1022                 }
1023                 val |= (1<<state->regs->MII_REGISTER_EN_BIT);
1024                 return setPhy(state, state->regs->MII_REGISTER_EN, val);
1025         }
1026         return 0;
1027 }
1028
1029 static int ip175c_reset(struct switch_dev *dev)
1030 {
1031         struct ip175c_state *state = dev->priv;
1032         int i, err;
1033
1034         err = state->regs->get_flags(state);
1035         if (err < 0)
1036                 return err;
1037
1038         if (REG_SUPP(state->regs->RESET_REG)) {
1039                 err = setPhy(state, state->regs->RESET_REG, state->regs->RESET_VAL);
1040                 if (err < 0)
1041                         return err;
1042                 err = getPhy(state, state->regs->RESET_REG);
1043
1044                 /*
1045                  *  Data sheet specifies reset period to be 2 msec.
1046                  *  (I don't see any mention of the 2ms delay in the IP178C spec, only
1047                  *  in IP175C, but it can't hurt.)
1048                  */
1049                 mdelay(2);
1050         }
1051
1052         /* reset switch ports */
1053         for (i = 0; i < state->regs->NUM_PORTS-1; i++) {
1054                 err = ip_phy_write(state, i, MII_BMCR, BMCR_RESET);
1055                 if (err < 0)
1056                         return err;
1057         }
1058
1059         ip175c_reset_vlan_config(state);
1060
1061         return state->regs->reset(state);
1062 }
1063
1064 static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1065 {
1066         struct ip175c_state *state = dev->priv;
1067         int err;
1068
1069         err = state->regs->get_state(state);
1070         if (err < 0)
1071                 return err;
1072
1073         if (state->add_tag & (1<<val->port_vlan)) {
1074                 if (state->remove_tag & (1<<val->port_vlan))
1075                         val->value.i = 3; // shouldn't ever happen.
1076                 else
1077                         val->value.i = 1;
1078         } else {
1079                 if (state->remove_tag & (1<<val->port_vlan))
1080                         val->value.i = 0;
1081                 else
1082                         val->value.i = 2;
1083         }
1084         return 0;
1085 }
1086
1087 static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1088 {
1089         struct ip175c_state *state = dev->priv;
1090         int err;
1091
1092         err = state->regs->get_state(state);
1093         if (err < 0)
1094                 return err;
1095
1096         state->add_tag &= ~(1<<val->port_vlan);
1097         state->remove_tag &= ~(1<<val->port_vlan);
1098
1099         if (val->value.i == 0)
1100                 state->remove_tag |= (1<<val->port_vlan);
1101         if (val->value.i == 1)
1102                 state->add_tag |= (1<<val->port_vlan);
1103
1104         return state->regs->update_state(state);
1105 }
1106
1107 /** Get the current phy address */
1108 static int ip175c_get_phy(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1109 {
1110         struct ip175c_state *state = dev->priv;
1111
1112         val->value.i = state->proc_mii.p;
1113         return 0;
1114 }
1115
1116 /** Set a new phy address for low level access to registers */
1117 static int ip175c_set_phy(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1118 {
1119         struct ip175c_state *state = dev->priv;
1120         int new_reg = val->value.i;
1121
1122         if (new_reg < 0 || new_reg > 31)
1123                 state->proc_mii.p = (u16)-1;
1124         else
1125                 state->proc_mii.p = (u16)new_reg;
1126         return 0;
1127 }
1128
1129 /** Get the current register number */
1130 static int ip175c_get_reg(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1131 {
1132         struct ip175c_state *state = dev->priv;
1133
1134         val->value.i = state->proc_mii.m;
1135         return 0;
1136 }
1137
1138 /** Set a new register address for low level access to registers */
1139 static int ip175c_set_reg(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1140 {
1141         struct ip175c_state *state = dev->priv;
1142         int new_reg = val->value.i;
1143
1144         if (new_reg < 0 || new_reg > 31)
1145                 state->proc_mii.m = (u16)-1;
1146         else
1147                 state->proc_mii.m = (u16)new_reg;
1148         return 0;
1149 }
1150
1151 /** Get the register content of state->proc_mii */
1152 static int ip175c_get_val(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1153 {
1154         struct ip175c_state *state = dev->priv;
1155         int retval = -EINVAL;
1156         if (REG_SUPP(state->proc_mii))
1157                 retval = getPhy(state, state->proc_mii);
1158
1159         if (retval < 0) {
1160                 return retval;
1161         } else {
1162                 val->value.i = retval;
1163                 return 0;
1164         }
1165 }
1166
1167 /** Write a value to the register defined by phy/reg above */
1168 static int ip175c_set_val(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1169 {
1170         struct ip175c_state *state = dev->priv;
1171         int myval, err = -EINVAL;
1172
1173         myval = val->value.i;
1174         if (myval <= 0xffff && myval >= 0 && REG_SUPP(state->proc_mii)) {
1175                 err = setPhy(state, state->proc_mii, (u16)myval);
1176         }
1177         return err;
1178 }
1179
1180 static int ip175c_read_name(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1181 {
1182         struct ip175c_state *state = dev->priv;
1183         val->value.s = state->regs->NAME; // Just a const pointer, won't be freed by swconfig.
1184         return 0;
1185 }
1186
1187 static int ip175c_get_tag(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1188 {
1189         struct ip175c_state *state = dev->priv;
1190         int vlan = val->port_vlan;
1191
1192         if (vlan < 0 || vlan >= MAX_VLANS)
1193                 return -EINVAL;
1194
1195         val->value.i = state->vlans[vlan].tag;
1196         return 0;
1197 }
1198
1199 static int ip175c_set_tag(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1200 {
1201         struct ip175c_state *state = dev->priv;
1202         int vlan = val->port_vlan;
1203         int tag = val->value.i;
1204
1205         if (vlan < 0 || vlan >= MAX_VLANS)
1206                 return -EINVAL;
1207
1208         if (tag < 0 || tag > 4095)
1209                 return -EINVAL;
1210
1211         state->vlans[vlan].tag = tag;
1212         return state->regs->update_state(state);
1213 }
1214
1215 static int ip175c_set_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1216 {
1217         struct ip175c_state *state = dev->priv;
1218         int nr = val->port_vlan;
1219         int ctrl;
1220         int autoneg;
1221         int speed;
1222         if (val->value.i == 100) {
1223                 speed = 1;
1224                 autoneg = 0;
1225         } else if (val->value.i == 10) {
1226                 speed = 0;
1227                 autoneg = 0;
1228         } else {
1229                 autoneg = 1;
1230                 speed = 1;
1231         }
1232
1233         /* Can't set speed for cpu port */
1234         if (nr == state->regs->CPU_PORT)
1235                 return -EINVAL;
1236
1237         if (nr >= dev->ports || nr < 0)
1238                 return -EINVAL;
1239
1240         ctrl = ip_phy_read(state, nr, 0);
1241         if (ctrl < 0)
1242                 return -EIO;
1243
1244         ctrl &= (~(1<<12));
1245         ctrl &= (~(1<<13));
1246         ctrl |= (autoneg<<12);
1247         ctrl |= (speed<<13);
1248
1249         return ip_phy_write(state, nr, 0, ctrl);
1250 }
1251
1252 static int ip175c_get_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1253 {
1254         struct ip175c_state *state = dev->priv;
1255         int nr = val->port_vlan;
1256         int speed, status;
1257
1258         if (nr == state->regs->CPU_PORT) {
1259                 val->value.i = 100;
1260                 return 0;
1261         }
1262
1263         if (nr >= dev->ports || nr < 0)
1264                 return -EINVAL;
1265
1266         status = ip_phy_read(state, nr, 1);
1267         speed = ip_phy_read(state, nr, 18);
1268         if (status < 0 || speed < 0)
1269                 return -EIO;
1270
1271         if (status & 4)
1272                 val->value.i = ((speed & (1<<11)) ? 100 : 10);
1273         else
1274                 val->value.i = 0;
1275
1276         return 0;
1277 }
1278
1279 static int ip175c_get_port_status(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1280 {
1281         struct ip175c_state *state = dev->priv;
1282         int ctrl, speed, status;
1283         int nr = val->port_vlan;
1284         int len;
1285         char *buf = state->buf; // fixed-length at 80.
1286
1287         if (nr == state->regs->CPU_PORT) {
1288                 sprintf(buf, "up, 100 Mbps, cpu port");
1289                 val->value.s = buf;
1290                 return 0;
1291         }
1292
1293         if (nr >= dev->ports || nr < 0)
1294                 return -EINVAL;
1295
1296         ctrl = ip_phy_read(state, nr, 0);
1297         status = ip_phy_read(state, nr, 1);
1298         speed = ip_phy_read(state, nr, 18);
1299         if (ctrl < 0 || status < 0 || speed < 0)
1300                 return -EIO;
1301
1302         if (status & 4)
1303                 len = sprintf(buf, "up, %d Mbps, %s duplex",
1304                         ((speed & (1<<11)) ? 100 : 10),
1305                         ((speed & (1<<10)) ? "full" : "half"));
1306         else
1307                 len = sprintf(buf, "down");
1308
1309         if (ctrl & (1<<12)) {
1310                 len += sprintf(buf+len, ", auto-negotiate");
1311                 if (!(status & (1<<5)))
1312                         len += sprintf(buf+len, " (in progress)");
1313         } else {
1314                 len += sprintf(buf+len, ", fixed speed (%d)",
1315                         ((ctrl & (1<<13)) ? 100 : 10));
1316         }
1317
1318         buf[len] = '\0';
1319         val->value.s = buf;
1320         return 0;
1321 }
1322
1323 static int ip175c_get_pvid(struct switch_dev *dev, int port, int *val)
1324 {
1325         struct ip175c_state *state = dev->priv;
1326
1327         *val = state->ports[port].pvid;
1328         return 0;
1329 }
1330
1331 static int ip175c_set_pvid(struct switch_dev *dev, int port, int val)
1332 {
1333         struct ip175c_state *state = dev->priv;
1334         int err;
1335
1336         if (val < 0 || val >= MAX_VLANS)
1337                 return -EINVAL;
1338
1339         err = state->regs->get_state(state);
1340         if (err < 0)
1341                 return err;
1342
1343         state->ports[port].pvid = val;
1344
1345         return state->regs->update_state(state);
1346 }
1347
1348
1349 enum Ports {
1350         IP175C_PORT_STATUS,
1351         IP175C_PORT_LINK,
1352         IP175C_PORT_TAGGED,
1353         IP175C_PORT_PVID,
1354 };
1355
1356 enum Globals {
1357         IP175C_ENABLE_VLAN,
1358         IP175C_GET_NAME,
1359         IP175C_REGISTER_PHY,
1360         IP175C_REGISTER_MII,
1361         IP175C_REGISTER_VALUE,
1362         IP175C_REGISTER_ERRNO,
1363 };
1364
1365 enum Vlans {
1366         IP175C_VLAN_TAG,
1367 };
1368
1369 static const struct switch_attr ip175c_global[] = {
1370         [IP175C_ENABLE_VLAN] = {
1371                 .id = IP175C_ENABLE_VLAN,
1372                 .type = SWITCH_TYPE_INT,
1373                 .name  = "enable_vlan",
1374                 .description = "Flag to enable or disable VLANs and tagging",
1375                 .get  = ip175c_get_enable_vlan,
1376                 .set = ip175c_set_enable_vlan,
1377         },
1378         [IP175C_GET_NAME] = {
1379                 .id = IP175C_GET_NAME,
1380                 .type = SWITCH_TYPE_STRING,
1381                 .description = "Returns the type of IC+ chip.",
1382                 .name  = "name",
1383                 .get  = ip175c_read_name,
1384                 .set = NULL,
1385         },
1386         /* jal: added for low level debugging etc. */
1387         [IP175C_REGISTER_PHY] = {
1388                 .id = IP175C_REGISTER_PHY,
1389                 .type = SWITCH_TYPE_INT,
1390                 .description = "Direct register access: set PHY (0-4, or 29,30,31)",
1391                 .name  = "phy",
1392                 .get  = ip175c_get_phy,
1393                 .set = ip175c_set_phy,
1394         },
1395         [IP175C_REGISTER_MII] = {
1396                 .id = IP175C_REGISTER_MII,
1397                 .type = SWITCH_TYPE_INT,
1398                 .description = "Direct register access: set MII register number (0-31)",
1399                 .name  = "reg",
1400                 .get  = ip175c_get_reg,
1401                 .set = ip175c_set_reg,
1402         },
1403         [IP175C_REGISTER_VALUE] = {
1404                 .id = IP175C_REGISTER_VALUE,
1405                 .type = SWITCH_TYPE_INT,
1406                 .description = "Direct register access: read/write to register (0-65535)",
1407                 .name  = "val",
1408                 .get  = ip175c_get_val,
1409                 .set = ip175c_set_val,
1410         },
1411 };
1412
1413 static const struct switch_attr ip175c_vlan[] = {
1414         [IP175C_VLAN_TAG] = {
1415                 .id = IP175C_VLAN_TAG,
1416                 .type = SWITCH_TYPE_INT,
1417                 .description = "VLAN tag (0-4095) [IP175D only]",
1418                 .name = "tag",
1419                 .get = ip175c_get_tag,
1420                 .set = ip175c_set_tag,
1421         }
1422 };
1423
1424 static const struct switch_attr ip175c_port[] = {
1425         [IP175C_PORT_STATUS] = {
1426                 .id = IP175C_PORT_STATUS,
1427                 .type = SWITCH_TYPE_STRING,
1428                 .description = "Returns Detailed port status",
1429                 .name  = "status",
1430                 .get  = ip175c_get_port_status,
1431                 .set = NULL,
1432         },
1433         [IP175C_PORT_LINK] = {
1434                 .id = IP175C_PORT_LINK,
1435                 .type = SWITCH_TYPE_INT,
1436                 .description = "Link speed. Can write 0 for auto-negotiate, or 10 or 100",
1437                 .name  = "link",
1438                 .get  = ip175c_get_port_speed,
1439                 .set = ip175c_set_port_speed,
1440         },
1441         [IP175C_PORT_TAGGED] = {
1442                 .id = IP175C_PORT_LINK,
1443                 .type = SWITCH_TYPE_INT,
1444                 .description = "0 = untag, 1 = add tags, 2 = do not alter (This value is reset if vlans are altered)",
1445                 .name  = "tagged",
1446                 .get  = ip175c_get_tagged,
1447                 .set = ip175c_set_tagged,
1448         },
1449 };
1450
1451 static int ip175c_probe(struct phy_device *pdev)
1452 {
1453         struct ip175c_state *state;
1454         struct switch_dev *dev;
1455         int err;
1456
1457         /* We only attach to PHY 0, but use all available PHYs */
1458         if (pdev->addr != 0)
1459                 return -ENODEV;
1460
1461         state = kzalloc(sizeof(*state), GFP_KERNEL);
1462         if (!state)
1463                 return -ENOMEM;
1464
1465         dev = &state->dev;
1466         dev->attr_global.attr = ip175c_global;
1467         dev->attr_global.n_attr = ARRAY_SIZE(ip175c_global);
1468         dev->attr_port.attr = ip175c_port;
1469         dev->attr_port.n_attr = ARRAY_SIZE(ip175c_port);
1470         dev->attr_vlan.attr = ip175c_vlan;
1471         dev->attr_vlan.n_attr = ARRAY_SIZE(ip175c_vlan);
1472
1473         dev->get_port_pvid = ip175c_get_pvid;
1474         dev->set_port_pvid = ip175c_set_pvid;
1475         dev->get_vlan_ports = ip175c_get_ports;
1476         dev->set_vlan_ports = ip175c_set_ports;
1477         dev->apply_config = ip175c_apply;
1478         dev->reset_switch = ip175c_reset;
1479
1480         dev->priv = state;
1481         pdev->priv = state;
1482         state->mii_bus = pdev->bus;
1483
1484         err = get_model(state);
1485         if (err < 0)
1486                 goto error;
1487
1488         dev->vlans = MAX_VLANS;
1489         dev->cpu_port = state->regs->CPU_PORT;
1490         dev->ports = state->regs->NUM_PORTS;
1491         dev->name = state->regs->NAME;
1492
1493         pr_info("IP175C: Found %s at %s\n", dev->name, dev_name(&pdev->dev));
1494         return 0;
1495
1496 error:
1497         kfree(state);
1498         return err;
1499 }
1500
1501 static int ip175c_config_init(struct phy_device *pdev)
1502 {
1503         struct ip175c_state *state = pdev->priv;
1504         struct net_device *dev = pdev->attached_dev;
1505         int err;
1506
1507         pdev->irq = PHY_IGNORE_INTERRUPT;
1508         err = register_switch(&state->dev, dev);
1509         if (err < 0)
1510                 return err;
1511
1512         ip175c_reset(&state->dev);
1513
1514         state->registered = true;
1515
1516         pdev->state = PHY_RUNNING;
1517         pdev->speed = SPEED_100;
1518         pdev->duplex = DUPLEX_FULL;
1519         pdev->pause = pdev->asym_pause = 0;
1520         netif_carrier_on(pdev->attached_dev);
1521
1522         return 0;
1523 }
1524
1525 static void ip175c_remove(struct phy_device *pdev)
1526 {
1527         struct ip175c_state *state = pdev->priv;
1528
1529         if (state->registered)
1530                 unregister_switch(&state->dev);
1531         kfree(state);
1532 }
1533
1534 static int ip175c_config_aneg(struct phy_device *pdev)
1535 {
1536         return 0;
1537 }
1538
1539 static int ip175c_read_status(struct phy_device *pdev)
1540 {
1541         return 0;
1542 }
1543
1544 static struct phy_driver ip175c_driver = {
1545         .name           = "IC+ IP175C",
1546         .phy_id         = 0x02430c00,
1547         .phy_id_mask    = 0x0ffffc00,
1548         .features       = PHY_BASIC_FEATURES,
1549         .probe          = ip175c_probe,
1550         .remove         = ip175c_remove,
1551         .config_init    = ip175c_config_init,
1552         .config_aneg    = ip175c_config_aneg,
1553         .read_status    = ip175c_read_status,
1554         .driver         = { .owner = THIS_MODULE },
1555 };
1556
1557 static struct phy_driver ip175a_driver = {
1558         .name           = "IC+ IP175A",
1559         .phy_id         = 0x02430c50,
1560         .phy_id_mask    = 0x0ffffff0,
1561         .features       = PHY_BASIC_FEATURES,
1562         .probe          = ip175c_probe,
1563         .remove         = ip175c_remove,
1564         .config_init    = ip175c_config_init,
1565         .config_aneg    = ip175c_config_aneg,
1566         .read_status    = ip175c_read_status,
1567         .driver         = { .owner = THIS_MODULE },
1568 };
1569
1570
1571 int __init ip175c_init(void)
1572 {
1573         int ret;
1574
1575         ret = phy_driver_register(&ip175a_driver);
1576         if (ret < 0)
1577                 return ret;
1578
1579         return phy_driver_register(&ip175c_driver);
1580 }
1581
1582 void __exit ip175c_exit(void)
1583 {
1584         phy_driver_unregister(&ip175c_driver);
1585         phy_driver_unregister(&ip175a_driver);
1586 }
1587
1588 MODULE_AUTHOR("Patrick Horn <patrick.horn@gmail.com>");
1589 MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
1590 MODULE_LICENSE("GPL");
1591
1592 module_init(ip175c_init);
1593 module_exit(ip175c_exit);