target/linux/generic/files/drivers/net/phy/rtl8366_smi.c

   1 /*
   2  * Realtek RTL8366 SMI interface driver
   3  *
   4  * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/device.h>
  14 #include <linux/delay.h>
  15 #include <linux/gpio.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/skbuff.h>
  18
  19 #ifdef CONFIG_RTL8366S_PHY_DEBUG_FS
  20 #include <linux/debugfs.h>
  21 #endif
  22
  23 #include "rtl8366_smi.h"
  24
  25 #define RTL8366_SMI_ACK_RETRY_COUNT         5
  26 #define RTL8366_SMI_CLK_DELAY               10 /* nsec */
  27
  28 static inline void rtl8366_smi_clk_delay(struct rtl8366_smi *smi)
  29 {
  30         ndelay(RTL8366_SMI_CLK_DELAY);
  31 }
  32
  33 static void rtl8366_smi_start(struct rtl8366_smi *smi)
  34 {
  35         unsigned int sda = smi->gpio_sda;
  36         unsigned int sck = smi->gpio_sck;
  37
  38         /*
  39          * Set GPIO pins to output mode, with initial state:
  40          * SCK = 0, SDA = 1
  41          */
  42         gpio_direction_output(sck, 0);
  43         gpio_direction_output(sda, 1);
  44         rtl8366_smi_clk_delay(smi);
  45
  46         /* CLK 1: 0 -> 1, 1 -> 0 */
  47         gpio_set_value(sck, 1);
  48         rtl8366_smi_clk_delay(smi);
  49         gpio_set_value(sck, 0);
  50         rtl8366_smi_clk_delay(smi);
  51
  52         /* CLK 2: */
  53         gpio_set_value(sck, 1);
  54         rtl8366_smi_clk_delay(smi);
  55         gpio_set_value(sda, 0);
  56         rtl8366_smi_clk_delay(smi);
  57         gpio_set_value(sck, 0);
  58         rtl8366_smi_clk_delay(smi);
  59         gpio_set_value(sda, 1);
  60 }
  61
  62 static void rtl8366_smi_stop(struct rtl8366_smi *smi)
  63 {
  64         unsigned int sda = smi->gpio_sda;
  65         unsigned int sck = smi->gpio_sck;
  66
  67         rtl8366_smi_clk_delay(smi);
  68         gpio_set_value(sda, 0);
  69         gpio_set_value(sck, 1);
  70         rtl8366_smi_clk_delay(smi);
  71         gpio_set_value(sda, 1);
  72         rtl8366_smi_clk_delay(smi);
  73         gpio_set_value(sck, 1);
  74         rtl8366_smi_clk_delay(smi);
  75         gpio_set_value(sck, 0);
  76         rtl8366_smi_clk_delay(smi);
  77         gpio_set_value(sck, 1);
  78
  79         /* add a click */
  80         rtl8366_smi_clk_delay(smi);
  81         gpio_set_value(sck, 0);
  82         rtl8366_smi_clk_delay(smi);
  83         gpio_set_value(sck, 1);
  84
  85         /* set GPIO pins to input mode */
  86         gpio_direction_input(sda);
  87         gpio_direction_input(sck);
  88 }
  89
  90 static void rtl8366_smi_write_bits(struct rtl8366_smi *smi, u32 data, u32 len)
  91 {
  92         unsigned int sda = smi->gpio_sda;
  93         unsigned int sck = smi->gpio_sck;
  94
  95         for (; len > 0; len--) {
  96                 rtl8366_smi_clk_delay(smi);
  97
  98                 /* prepare data */
  99                 gpio_set_value(sda, !!(data & ( 1 << (len - 1))));
 100                 rtl8366_smi_clk_delay(smi);
 101
 102                 /* clocking */
 103                 gpio_set_value(sck, 1);
 104                 rtl8366_smi_clk_delay(smi);
 105                 gpio_set_value(sck, 0);
 106         }
 107 }
 108
 109 static void rtl8366_smi_read_bits(struct rtl8366_smi *smi, u32 len, u32 *data)
 110 {
 111         unsigned int sda = smi->gpio_sda;
 112         unsigned int sck = smi->gpio_sck;
 113
 114         gpio_direction_input(sda);
 115
 116         for (*data = 0; len > 0; len--) {
 117                 u32 u;
 118
 119                 rtl8366_smi_clk_delay(smi);
 120
 121                 /* clocking */
 122                 gpio_set_value(sck, 1);
 123                 rtl8366_smi_clk_delay(smi);
 124                 u = !!gpio_get_value(sda);
 125                 gpio_set_value(sck, 0);
 126
 127                 *data |= (u << (len - 1));
 128         }
 129
 130         gpio_direction_output(sda, 0);
 131 }
 132
 133 static int rtl8366_smi_wait_for_ack(struct rtl8366_smi *smi)
 134 {
 135         int retry_cnt;
 136
 137         retry_cnt = 0;
 138         do {
 139                 u32 ack;
 140
 141                 rtl8366_smi_read_bits(smi, 1, &ack);
 142                 if (ack == 0)
 143                         break;
 144
 145                 if (++retry_cnt > RTL8366_SMI_ACK_RETRY_COUNT)
 146                         return -EIO;
 147         } while (1);
 148
 149         return 0;
 150 }
 151
 152 static int rtl8366_smi_write_byte(struct rtl8366_smi *smi, u8 data)
 153 {
 154         rtl8366_smi_write_bits(smi, data, 8);
 155         return rtl8366_smi_wait_for_ack(smi);
 156 }
 157
 158 static int rtl8366_smi_read_byte0(struct rtl8366_smi *smi, u8 *data)
 159 {
 160         u32 t;
 161
 162         /* read data */
 163         rtl8366_smi_read_bits(smi, 8, &t);
 164         *data = (t & 0xff);
 165
 166         /* send an ACK */
 167         rtl8366_smi_write_bits(smi, 0x00, 1);
 168
 169         return 0;
 170 }
 171
 172 static int rtl8366_smi_read_byte1(struct rtl8366_smi *smi, u8 *data)
 173 {
 174         u32 t;
 175
 176         /* read data */
 177         rtl8366_smi_read_bits(smi, 8, &t);
 178         *data = (t & 0xff);
 179
 180         /* send an ACK */
 181         rtl8366_smi_write_bits(smi, 0x01, 1);
 182
 183         return 0;
 184 }
 185
 186 int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
 187 {
 188         unsigned long flags;
 189         u8 lo = 0;
 190         u8 hi = 0;
 191         int ret;
 192
 193         spin_lock_irqsave(&smi->lock, flags);
 194
 195         rtl8366_smi_start(smi);
 196
 197         /* send READ command */
 198         ret = rtl8366_smi_write_byte(smi, 0x0a << 4 | 0x04 << 1 | 0x01);
 199         if (ret)
 200                 goto out;
 201
 202         /* set ADDR[7:0] */
 203         ret = rtl8366_smi_write_byte(smi, addr & 0xff);
 204         if (ret)
 205                 goto out;
 206
 207         /* set ADDR[15:8] */
 208         ret = rtl8366_smi_write_byte(smi, addr >> 8);
 209         if (ret)
 210                 goto out;
 211
 212         /* read DATA[7:0] */
 213         rtl8366_smi_read_byte0(smi, &lo);
 214         /* read DATA[15:8] */
 215         rtl8366_smi_read_byte1(smi, &hi);
 216
 217         *data = ((u32) lo) | (((u32) hi) << 8);
 218
 219         ret = 0;
 220
 221  out:
 222         rtl8366_smi_stop(smi);
 223         spin_unlock_irqrestore(&smi->lock, flags);
 224
 225         return ret;
 226 }
 227 EXPORT_SYMBOL_GPL(rtl8366_smi_read_reg);
 228
 229 int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
 230 {
 231         unsigned long flags;
 232         int ret;
 233
 234         spin_lock_irqsave(&smi->lock, flags);
 235
 236         rtl8366_smi_start(smi);
 237
 238         /* send WRITE command */
 239         ret = rtl8366_smi_write_byte(smi, 0x0a << 4 | 0x04 << 1 | 0x00);
 240         if (ret)
 241                 goto out;
 242
 243         /* set ADDR[7:0] */
 244         ret = rtl8366_smi_write_byte(smi, addr & 0xff);
 245         if (ret)
 246                 goto out;
 247
 248         /* set ADDR[15:8] */
 249         ret = rtl8366_smi_write_byte(smi, addr >> 8);
 250         if (ret)
 251                 goto out;
 252
 253         /* write DATA[7:0] */
 254         ret = rtl8366_smi_write_byte(smi, data & 0xff);
 255         if (ret)
 256                 goto out;
 257
 258         /* write DATA[15:8] */
 259         ret = rtl8366_smi_write_byte(smi, data >> 8);
 260         if (ret)
 261                 goto out;
 262
 263         ret = 0;
 264
 265  out:
 266         rtl8366_smi_stop(smi);
 267         spin_unlock_irqrestore(&smi->lock, flags);
 268
 269         return ret;
 270 }
 271 EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg);
 272
 273 int rtl8366_smi_rmwr(struct rtl8366_smi *smi, u32 addr, u32 mask, u32 data)
 274 {
 275         u32 t;
 276         int err;
 277
 278         err = rtl8366_smi_read_reg(smi, addr, &t);
 279         if (err)
 280                 return err;
 281
 282         err = rtl8366_smi_write_reg(smi, addr, (t & ~mask) | data);
 283         return err;
 284
 285 }
 286 EXPORT_SYMBOL_GPL(rtl8366_smi_rmwr);
 287
 288 static int rtl8366_mc_is_used(struct rtl8366_smi *smi, int mc_index, int *used)
 289 {
 290         int err;
 291         int i;
 292
 293         *used = 0;
 294         for (i = 0; i < smi->num_ports; i++) {
 295                 int index = 0;
 296
 297                 err = smi->ops->get_mc_index(smi, i, &index);
 298                 if (err)
 299                         return err;
 300
 301                 if (mc_index == index) {
 302                         *used = 1;
 303                         break;
 304                 }
 305         }
 306
 307         return 0;
 308 }
 309
 310 static int rtl8366_set_vlan(struct rtl8366_smi *smi, int vid, u32 member,
 311                             u32 untag, u32 fid)
 312 {
 313         struct rtl8366_vlan_4k vlan4k;
 314         int err;
 315         int i;
 316
 317         /* Update the 4K table */
 318         err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
 319         if (err)
 320                 return err;
 321
 322         vlan4k.member = member;
 323         vlan4k.untag = untag;
 324         vlan4k.fid = fid;
 325         err = smi->ops->set_vlan_4k(smi, &vlan4k);
 326         if (err)
 327                 return err;
 328
 329         /* Try to find an existing MC entry for this VID */
 330         for (i = 0; i < smi->num_vlan_mc; i++) {
 331                 struct rtl8366_vlan_mc vlanmc;
 332
 333                 err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
 334                 if (err)
 335                         return err;
 336
 337                 if (vid == vlanmc.vid) {
 338                         /* update the MC entry */
 339                         vlanmc.member = member;
 340                         vlanmc.untag = untag;
 341                         vlanmc.fid = fid;
 342
 343                         err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
 344                         break;
 345                 }
 346         }
 347
 348         return err;
 349 }
 350
 351 static int rtl8366_get_pvid(struct rtl8366_smi *smi, int port, int *val)
 352 {
 353         struct rtl8366_vlan_mc vlanmc;
 354         int err;
 355         int index;
 356
 357         err = smi->ops->get_mc_index(smi, port, &index);
 358         if (err)
 359                 return err;
 360
 361         err = smi->ops->get_vlan_mc(smi, index, &vlanmc);
 362         if (err)
 363                 return err;
 364
 365         *val = vlanmc.vid;
 366         return 0;
 367 }
 368
 369 static int rtl8366_set_pvid(struct rtl8366_smi *smi, unsigned port,
 370                             unsigned vid)
 371 {
 372         struct rtl8366_vlan_mc vlanmc;
 373         struct rtl8366_vlan_4k vlan4k;
 374         int err;
 375         int i;
 376
 377         /* Try to find an existing MC entry for this VID */
 378         for (i = 0; i < smi->num_vlan_mc; i++) {
 379                 err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
 380                 if (err)
 381                         return err;
 382
 383                 if (vid == vlanmc.vid) {
 384                         err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
 385                         if (err)
 386                                 return err;
 387
 388                         err = smi->ops->set_mc_index(smi, port, i);
 389                         return err;
 390                 }
 391         }
 392
 393         /* We have no MC entry for this VID, try to find an empty one */
 394         for (i = 0; i < smi->num_vlan_mc; i++) {
 395                 err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
 396                 if (err)
 397                         return err;
 398
 399                 if (vlanmc.vid == 0 && vlanmc.member == 0) {
 400                         /* Update the entry from the 4K table */
 401                         err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
 402                         if (err)
 403                                 return err;
 404
 405                         vlanmc.vid = vid;
 406                         vlanmc.member = vlan4k.member;
 407                         vlanmc.untag = vlan4k.untag;
 408                         vlanmc.fid = vlan4k.fid;
 409                         err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
 410                         if (err)
 411                                 return err;
 412
 413                         err = smi->ops->set_mc_index(smi, port, i);
 414                         return err;
 415                 }
 416         }
 417
 418         /* MC table is full, try to find an unused entry and replace it */
 419         for (i = 0; i < smi->num_vlan_mc; i++) {
 420                 int used;
 421
 422                 err = rtl8366_mc_is_used(smi, i, &used);
 423                 if (err)
 424                         return err;
 425
 426                 if (!used) {
 427                         /* Update the entry from the 4K table */
 428                         err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
 429                         if (err)
 430                                 return err;
 431
 432                         vlanmc.vid = vid;
 433                         vlanmc.member = vlan4k.member;
 434                         vlanmc.untag = vlan4k.untag;
 435                         vlanmc.fid = vlan4k.fid;
 436                         err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
 437                         if (err)
 438                                 return err;
 439
 440                         err = smi->ops->set_mc_index(smi, port, i);
 441                         return err;
 442                 }
 443         }
 444
 445         dev_err(smi->parent,
 446                 "all VLAN member configurations are in use\n");
 447
 448         return -ENOSPC;
 449 }
 450
 451 static int rtl8366_enable_vlan(struct rtl8366_smi *smi, int enable)
 452 {
 453         int err;
 454
 455         err = smi->ops->enable_vlan(smi, enable);
 456         if (err)
 457                 return err;
 458
 459         smi->vlan_enabled = enable;
 460
 461         if (!enable) {
 462                 smi->vlan4k_enabled = 0;
 463                 err = smi->ops->enable_vlan4k(smi, enable);
 464         }
 465
 466         return err;
 467 }
 468
 469 static int rtl8366_enable_vlan4k(struct rtl8366_smi *smi, int enable)
 470 {
 471         int err;
 472
 473         if (enable) {
 474                 err = smi->ops->enable_vlan(smi, enable);
 475                 if (err)
 476                         return err;
 477
 478                 smi->vlan_enabled = enable;
 479         }
 480
 481         err = smi->ops->enable_vlan4k(smi, enable);
 482         if (err)
 483                 return err;
 484
 485         smi->vlan4k_enabled = enable;
 486         return 0;
 487 }
 488
 489 int rtl8366_reset_vlan(struct rtl8366_smi *smi)
 490 {
 491         struct rtl8366_vlan_mc vlanmc;
 492         int err;
 493         int i;
 494
 495         rtl8366_enable_vlan(smi, 0);
 496         rtl8366_enable_vlan4k(smi, 0);
 497
 498         /* clear VLAN member configurations */
 499         vlanmc.vid = 0;
 500         vlanmc.priority = 0;
 501         vlanmc.member = 0;
 502         vlanmc.untag = 0;
 503         vlanmc.fid = 0;
 504         for (i = 0; i < smi->num_vlan_mc; i++) {
 505                 err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
 506                 if (err)
 507                         return err;
 508         }
 509
 510         for (i = 0; i < smi->num_ports; i++) {
 511                 if (i == smi->cpu_port)
 512                         continue;
 513
 514                 err = rtl8366_set_vlan(smi, (i + 1),
 515                                         (1 << i) | (1 << smi->cpu_port),
 516                                         (1 << i) | (1 << smi->cpu_port),
 517                                         0);
 518                 if (err)
 519                         return err;
 520
 521                 err = rtl8366_set_pvid(smi, i, (i + 1));
 522                 if (err)
 523                         return err;
 524         }
 525
 526         return 0;
 527 }
 528 EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);
 529
 530 #ifdef CONFIG_RTL8366S_PHY_DEBUG_FS
 531 int rtl8366_debugfs_open(struct inode *inode, struct file *file)
 532 {
 533         file->private_data = inode->i_private;
 534         return 0;
 535 }
 536 EXPORT_SYMBOL_GPL(rtl8366_debugfs_open);
 537
 538 static ssize_t rtl8366_read_debugfs_vlan_mc(struct file *file,
 539                                               char __user *user_buf,
 540                                               size_t count, loff_t *ppos)
 541 {
 542         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 543         int i, len = 0;
 544         char *buf = smi->buf;
 545
 546         len += snprintf(buf + len, sizeof(smi->buf) - len,
 547                         "%2s %6s %4s %6s %6s %3s\n",
 548                         "id", "vid","prio", "member", "untag", "fid");
 549
 550         for (i = 0; i < smi->num_vlan_mc; ++i) {
 551                 struct rtl8366_vlan_mc vlanmc;
 552
 553                 smi->ops->get_vlan_mc(smi, i, &vlanmc);
 554
 555                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 556                                 "%2d %6d %4d 0x%04x 0x%04x %3d\n",
 557                                 i, vlanmc.vid, vlanmc.priority,
 558                                 vlanmc.member, vlanmc.untag, vlanmc.fid);
 559         }
 560
 561         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 562 }
 563
 564 static ssize_t rtl8366_read_debugfs_pvid(struct file *file,
 565                                          char __user *user_buf,
 566                                          size_t count, loff_t *ppos)
 567 {
 568         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 569         char *buf = smi->buf;
 570         int len = 0;
 571         int i;
 572
 573         len += snprintf(buf + len, sizeof(smi->buf) - len, "%4s %4s\n",
 574                         "port", "pvid");
 575
 576         for (i = 0; i < smi->num_ports; i++) {
 577                 int pvid;
 578                 int err;
 579
 580                 err = rtl8366_get_pvid(smi, i, &pvid);
 581                 if (err)
 582                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 583                                 "%4d error\n", i);
 584                 else
 585                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 586                                 "%4d %4d\n", i, pvid);
 587         }
 588
 589         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 590 }
 591
 592 static ssize_t rtl8366_read_debugfs_reg(struct file *file,
 593                                          char __user *user_buf,
 594                                          size_t count, loff_t *ppos)
 595 {
 596         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 597         u32 t, reg = smi->dbg_reg;
 598         int err, len = 0;
 599         char *buf = smi->buf;
 600
 601         memset(buf, '\0', sizeof(smi->buf));
 602
 603         err = rtl8366_smi_read_reg(smi, reg, &t);
 604         if (err) {
 605                 len += snprintf(buf, sizeof(smi->buf),
 606                                 "Read failed (reg: 0x%04x)\n", reg);
 607                 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 608         }
 609
 610         len += snprintf(buf, sizeof(smi->buf), "reg = 0x%04x, val = 0x%04x\n",
 611                         reg, t);
 612
 613         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 614 }
 615
 616 static ssize_t rtl8366_write_debugfs_reg(struct file *file,
 617                                           const char __user *user_buf,
 618                                           size_t count, loff_t *ppos)
 619 {
 620         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 621         unsigned long data;
 622         u32 reg = smi->dbg_reg;
 623         int err;
 624         size_t len;
 625         char *buf = smi->buf;
 626
 627         len = min(count, sizeof(smi->buf) - 1);
 628         if (copy_from_user(buf, user_buf, len)) {
 629                 dev_err(smi->parent, "copy from user failed\n");
 630                 return -EFAULT;
 631         }
 632
 633         buf[len] = '\0';
 634         if (len > 0 && buf[len - 1] == '\n')
 635                 buf[len - 1] = '\0';
 636
 637
 638         if (strict_strtoul(buf, 16, &data)) {
 639                 dev_err(smi->parent, "Invalid reg value %s\n", buf);
 640         } else {
 641                 err = rtl8366_smi_write_reg(smi, reg, data);
 642                 if (err) {
 643                         dev_err(smi->parent,
 644                                 "writing reg 0x%04x val 0x%04lx failed\n",
 645                                 reg, data);
 646                 }
 647         }
 648
 649         return count;
 650 }
 651
 652 static ssize_t rtl8366_read_debugfs_mibs(struct file *file,
 653                                          char __user *user_buf,
 654                                          size_t count, loff_t *ppos)
 655 {
 656         struct rtl8366_smi *smi = file->private_data;
 657         int i, j, len = 0;
 658         char *buf = smi->buf;
 659
 660         len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s",
 661                         "Counter");
 662
 663         for (i = 0; i < smi->num_ports; i++) {
 664                 char port_buf[10];
 665
 666                 snprintf(port_buf, sizeof(port_buf), "Port %d", i);
 667                 len += snprintf(buf + len, sizeof(smi->buf) - len, " %12s",
 668                                 port_buf);
 669         }
 670         len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 671
 672         for (i = 0; i < smi->num_mib_counters; i++) {
 673                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s ",
 674                                 smi->mib_counters[i].name);
 675                 for (j = 0; j < smi->num_ports; j++) {
 676                         unsigned long long counter = 0;
 677
 678                         if (!smi->ops->get_mib_counter(smi, i, j, &counter))
 679                                 len += snprintf(buf + len,
 680                                                 sizeof(smi->buf) - len,
 681                                                 "%12llu ", counter);
 682                         else
 683                                 len += snprintf(buf + len,
 684                                                 sizeof(smi->buf) - len,
 685                                                 "%12s ", "error");
 686                 }
 687                 len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 688         }
 689
 690         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 691 }
 692
 693 static const struct file_operations fops_rtl8366_regs = {
 694         .read   = rtl8366_read_debugfs_reg,
 695         .write  = rtl8366_write_debugfs_reg,
 696         .open   = rtl8366_debugfs_open,
 697         .owner  = THIS_MODULE
 698 };
 699
 700 static const struct file_operations fops_rtl8366_vlan_mc = {
 701         .read   = rtl8366_read_debugfs_vlan_mc,
 702         .open   = rtl8366_debugfs_open,
 703         .owner  = THIS_MODULE
 704 };
 705
 706 static const struct file_operations fops_rtl8366_pvid = {
 707         .read   = rtl8366_read_debugfs_pvid,
 708         .open   = rtl8366_debugfs_open,
 709         .owner  = THIS_MODULE
 710 };
 711
 712 static const struct file_operations fops_rtl8366_mibs = {
 713         .read = rtl8366_read_debugfs_mibs,
 714         .open = rtl8366_debugfs_open,
 715         .owner = THIS_MODULE
 716 };
 717
 718 static void rtl8366_debugfs_init(struct rtl8366_smi *smi)
 719 {
 720         struct dentry *node;
 721         struct dentry *root;
 722
 723         if (!smi->debugfs_root)
 724                 smi->debugfs_root = debugfs_create_dir(dev_name(smi->parent),
 725                                                        NULL);
 726
 727         if (!smi->debugfs_root) {
 728                 dev_err(smi->parent, "Unable to create debugfs dir\n");
 729                 return;
 730         }
 731         root = smi->debugfs_root;
 732
 733         node = debugfs_create_x16("reg", S_IRUGO | S_IWUSR, root,
 734                                   &smi->dbg_reg);
 735         if (!node) {
 736                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 737                         "reg");
 738                 return;
 739         }
 740
 741         node = debugfs_create_file("val", S_IRUGO | S_IWUSR, root, smi,
 742                                    &fops_rtl8366_regs);
 743         if (!node) {
 744                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 745                         "val");
 746                 return;
 747         }
 748
 749         node = debugfs_create_file("vlan_mc", S_IRUSR, root, smi,
 750                                    &fops_rtl8366_vlan_mc);
 751         if (!node) {
 752                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 753                         "vlan_mc");
 754                 return;
 755         }
 756
 757         node = debugfs_create_file("pvid", S_IRUSR, root, smi,
 758                                    &fops_rtl8366_pvid);
 759         if (!node) {
 760                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 761                         "pvid");
 762                 return;
 763         }
 764
 765         node = debugfs_create_file("mibs", S_IRUSR, smi->debugfs_root, smi,
 766                                    &fops_rtl8366_mibs);
 767         if (!node)
 768                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 769                         "mibs");
 770 }
 771
 772 static void rtl8366_debugfs_remove(struct rtl8366_smi *smi)
 773 {
 774         if (smi->debugfs_root) {
 775                 debugfs_remove_recursive(smi->debugfs_root);
 776                 smi->debugfs_root = NULL;
 777         }
 778 }
 779 #else
 780 static inline void rtl8366_debugfs_init(struct rtl8366_smi *smi) {}
 781 static inline void rtl8366_debugfs_remove(struct rtl8366_smi *smi) {}
 782 #endif /* CONFIG_RTL8366S_PHY_DEBUG_FS */
 783
 784 static int rtl8366_smi_mii_init(struct rtl8366_smi *smi)
 785 {
 786         int ret;
 787         int i;
 788
 789         smi->mii_bus = mdiobus_alloc();
 790         if (smi->mii_bus == NULL) {
 791                 ret = -ENOMEM;
 792                 goto err;
 793         }
 794
 795         smi->mii_bus->priv = (void *) smi;
 796         smi->mii_bus->name = dev_name(smi->parent);
 797         smi->mii_bus->read = smi->ops->mii_read;
 798         smi->mii_bus->write = smi->ops->mii_write;
 799         snprintf(smi->mii_bus->id, MII_BUS_ID_SIZE, "%s",
 800                  dev_name(smi->parent));
 801         smi->mii_bus->parent = smi->parent;
 802         smi->mii_bus->phy_mask = ~(0x1f);
 803         smi->mii_bus->irq = smi->mii_irq;
 804         for (i = 0; i < PHY_MAX_ADDR; i++)
 805                 smi->mii_irq[i] = PHY_POLL;
 806
 807         ret = mdiobus_register(smi->mii_bus);
 808         if (ret)
 809                 goto err_free;
 810
 811         return 0;
 812
 813  err_free:
 814         mdiobus_free(smi->mii_bus);
 815  err:
 816         return ret;
 817 }
 818
 819 static void rtl8366_smi_mii_cleanup(struct rtl8366_smi *smi)
 820 {
 821         mdiobus_unregister(smi->mii_bus);
 822         mdiobus_free(smi->mii_bus);
 823 }
 824
 825 int rtl8366_sw_get_port_pvid(struct switch_dev *dev, int port, int *val)
 826 {
 827         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 828         return rtl8366_get_pvid(smi, port, val);
 829 }
 830 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_pvid);
 831
 832 int rtl8366_sw_set_port_pvid(struct switch_dev *dev, int port, int val)
 833 {
 834         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 835         return rtl8366_set_pvid(smi, port, val);
 836 }
 837 EXPORT_SYMBOL_GPL(rtl8366_sw_set_port_pvid);
 838
 839 int rtl8366_sw_get_port_mib(struct switch_dev *dev,
 840                             const struct switch_attr *attr,
 841                             struct switch_val *val)
 842 {
 843         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 844         int i, len = 0;
 845         unsigned long long counter = 0;
 846         char *buf = smi->buf;
 847
 848         if (val->port_vlan >= smi->num_ports)
 849                 return -EINVAL;
 850
 851         len += snprintf(buf + len, sizeof(smi->buf) - len,
 852                         "Port %d MIB counters\n",
 853                         val->port_vlan);
 854
 855         for (i = 0; i < smi->num_mib_counters; ++i) {
 856                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 857                                 "%-36s: ", smi->mib_counters[i].name);
 858                 if (!smi->ops->get_mib_counter(smi, i, val->port_vlan,
 859                                                &counter))
 860                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 861                                         "%llu\n", counter);
 862                 else
 863                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 864                                         "%s\n", "error");
 865         }
 866
 867         val->value.s = buf;
 868         val->len = len;
 869         return 0;
 870 }
 871 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_mib);
 872
 873 int rtl8366_sw_get_vlan_info(struct switch_dev *dev,
 874                              const struct switch_attr *attr,
 875                              struct switch_val *val)
 876 {
 877         int i;
 878         u32 len = 0;
 879         struct rtl8366_vlan_4k vlan4k;
 880         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 881         char *buf = smi->buf;
 882         int err;
 883
 884         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 885                 return -EINVAL;
 886
 887         memset(buf, '\0', sizeof(smi->buf));
 888
 889         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 890         if (err)
 891                 return err;
 892
 893         len += snprintf(buf + len, sizeof(smi->buf) - len,
 894                         "VLAN %d: Ports: '", vlan4k.vid);
 895
 896         for (i = 0; i < smi->num_ports; i++) {
 897                 if (!(vlan4k.member & (1 << i)))
 898                         continue;
 899
 900                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%d%s", i,
 901                                 (vlan4k.untag & (1 << i)) ? "" : "t");
 902         }
 903
 904         len += snprintf(buf + len, sizeof(smi->buf) - len,
 905                         "', members=%04x, untag=%04x, fid=%u",
 906                         vlan4k.member, vlan4k.untag, vlan4k.fid);
 907
 908         val->value.s = buf;
 909         val->len = len;
 910
 911         return 0;
 912 }
 913 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_info);
 914
 915 int rtl8366_sw_get_vlan_ports(struct switch_dev *dev, struct switch_val *val)
 916 {
 917         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 918         struct switch_port *port;
 919         struct rtl8366_vlan_4k vlan4k;
 920         int i;
 921
 922         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 923                 return -EINVAL;
 924
 925         smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 926
 927         port = &val->value.ports[0];
 928         val->len = 0;
 929         for (i = 0; i < smi->num_ports; i++) {
 930                 if (!(vlan4k.member & BIT(i)))
 931                         continue;
 932
 933                 port->id = i;
 934                 port->flags = (vlan4k.untag & BIT(i)) ?
 935                                         0 : BIT(SWITCH_PORT_FLAG_TAGGED);
 936                 val->len++;
 937                 port++;
 938         }
 939         return 0;
 940 }
 941 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_ports);
 942
 943 int rtl8366_sw_set_vlan_ports(struct switch_dev *dev, struct switch_val *val)
 944 {
 945         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 946         struct switch_port *port;
 947         u32 member = 0;
 948         u32 untag = 0;
 949         int i;
 950
 951         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 952                 return -EINVAL;
 953
 954         port = &val->value.ports[0];
 955         for (i = 0; i < val->len; i++, port++) {
 956                 member |= BIT(port->id);
 957
 958                 if (!(port->flags & BIT(SWITCH_PORT_FLAG_TAGGED)))
 959                         untag |= BIT(port->id);
 960         }
 961
 962         return rtl8366_set_vlan(smi, val->port_vlan, member, untag, 0);
 963 }
 964 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_ports);
 965
 966 int rtl8366_sw_get_vlan_enable(struct switch_dev *dev,
 967                                const struct switch_attr *attr,
 968                                struct switch_val *val)
 969 {
 970         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 971
 972         if (attr->ofs > 2)
 973                 return -EINVAL;
 974
 975         if (attr->ofs == 1)
 976                 val->value.i = smi->vlan_enabled;
 977         else
 978                 val->value.i = smi->vlan4k_enabled;
 979
 980         return 0;
 981 }
 982 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_enable);
 983
 984 int rtl8366_sw_set_vlan_enable(struct switch_dev *dev,
 985                                const struct switch_attr *attr,
 986                                struct switch_val *val)
 987 {
 988         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 989         int err;
 990
 991         if (attr->ofs > 2)
 992                 return -EINVAL;
 993
 994         if (attr->ofs == 1)
 995                 err = rtl8366_enable_vlan(smi, val->value.i);
 996         else
 997                 err = rtl8366_enable_vlan4k(smi, val->value.i);
 998
 999         return err;
1000 }
1001 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_enable);
1002
1003 struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent)
1004 {
1005         struct rtl8366_smi *smi;
1006
1007         BUG_ON(!parent);
1008
1009         smi = kzalloc(sizeof(*smi), GFP_KERNEL);
1010         if (!smi) {
1011                 dev_err(parent, "no memory for private data\n");
1012                 return NULL;
1013         }
1014
1015         smi->parent = parent;
1016         return smi;
1017 }
1018 EXPORT_SYMBOL_GPL(rtl8366_smi_alloc);
1019
1020 int rtl8366_smi_init(struct rtl8366_smi *smi)
1021 {
1022         int err;
1023
1024         if (!smi->ops)
1025                 return -EINVAL;
1026
1027         err = gpio_request(smi->gpio_sda, dev_name(smi->parent));
1028         if (err) {
1029                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1030                         smi->gpio_sda, err);
1031                 goto err_out;
1032         }
1033
1034         err = gpio_request(smi->gpio_sck, dev_name(smi->parent));
1035         if (err) {
1036                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1037                         smi->gpio_sck, err);
1038                 goto err_free_sda;
1039         }
1040
1041         spin_lock_init(&smi->lock);
1042
1043         dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
1044                  smi->gpio_sda, smi->gpio_sck);
1045
1046         err = smi->ops->detect(smi);
1047         if (err) {
1048                 dev_err(smi->parent, "chip detection failed, err=%d\n", err);
1049                 goto err_free_sck;
1050         }
1051
1052         err = smi->ops->setup(smi);
1053         if (err) {
1054                 dev_err(smi->parent, "chip setup failed, err=%d\n", err);
1055                 goto err_free_sck;
1056         }
1057
1058         err = rtl8366_smi_mii_init(smi);
1059         if (err)
1060                 goto err_free_sck;
1061
1062         rtl8366_debugfs_init(smi);
1063
1064         return 0;
1065
1066  err_free_sck:
1067         gpio_free(smi->gpio_sck);
1068  err_free_sda:
1069         gpio_free(smi->gpio_sda);
1070  err_out:
1071         return err;
1072 }
1073 EXPORT_SYMBOL_GPL(rtl8366_smi_init);
1074
1075 void rtl8366_smi_cleanup(struct rtl8366_smi *smi)
1076 {
1077         rtl8366_debugfs_remove(smi);
1078         rtl8366_smi_mii_cleanup(smi);
1079         gpio_free(smi->gpio_sck);
1080         gpio_free(smi->gpio_sda);
1081 }
1082 EXPORT_SYMBOL_GPL(rtl8366_smi_cleanup);
1083
1084 MODULE_DESCRIPTION("Realtek RTL8366 SMI interface driver");
1085 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
1086 MODULE_LICENSE("GPL v2");