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 int rtl8366_reset_vlan(struct rtl8366_smi *smi)
 452 {
 453         struct rtl8366_vlan_mc vlanmc;
 454         int err;
 455         int i;
 456
 457         /* clear VLAN member configurations */
 458         vlanmc.vid = 0;
 459         vlanmc.priority = 0;
 460         vlanmc.member = 0;
 461         vlanmc.untag = 0;
 462         vlanmc.fid = 0;
 463         for (i = 0; i < smi->num_vlan_mc; i++) {
 464                 err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
 465                 if (err)
 466                         return err;
 467         }
 468
 469         for (i = 0; i < smi->num_ports; i++) {
 470                 if (i == smi->cpu_port)
 471                         continue;
 472
 473                 err = rtl8366_set_vlan(smi, (i + 1),
 474                                         (1 << i) | (1 << smi->cpu_port),
 475                                         (1 << i) | (1 << smi->cpu_port),
 476                                         0);
 477                 if (err)
 478                         return err;
 479
 480                 err = rtl8366_set_pvid(smi, i, (i + 1));
 481                 if (err)
 482                         return err;
 483         }
 484
 485         return 0;
 486 }
 487 EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);
 488
 489 #ifdef CONFIG_RTL8366S_PHY_DEBUG_FS
 490 int rtl8366_debugfs_open(struct inode *inode, struct file *file)
 491 {
 492         file->private_data = inode->i_private;
 493         return 0;
 494 }
 495 EXPORT_SYMBOL_GPL(rtl8366_debugfs_open);
 496
 497 static ssize_t rtl8366_read_debugfs_vlan_mc(struct file *file,
 498                                               char __user *user_buf,
 499                                               size_t count, loff_t *ppos)
 500 {
 501         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 502         int i, len = 0;
 503         char *buf = smi->buf;
 504
 505         len += snprintf(buf + len, sizeof(smi->buf) - len,
 506                         "%2s %6s %4s %6s %6s %3s\n",
 507                         "id", "vid","prio", "member", "untag", "fid");
 508
 509         for (i = 0; i < smi->num_vlan_mc; ++i) {
 510                 struct rtl8366_vlan_mc vlanmc;
 511
 512                 smi->ops->get_vlan_mc(smi, i, &vlanmc);
 513
 514                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 515                                 "%2d %6d %4d 0x%04x 0x%04x %3d\n",
 516                                 i, vlanmc.vid, vlanmc.priority,
 517                                 vlanmc.member, vlanmc.untag, vlanmc.fid);
 518         }
 519
 520         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 521 }
 522
 523 static ssize_t rtl8366_read_debugfs_reg(struct file *file,
 524                                          char __user *user_buf,
 525                                          size_t count, loff_t *ppos)
 526 {
 527         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 528         u32 t, reg = smi->dbg_reg;
 529         int err, len = 0;
 530         char *buf = smi->buf;
 531
 532         memset(buf, '\0', sizeof(smi->buf));
 533
 534         err = rtl8366_smi_read_reg(smi, reg, &t);
 535         if (err) {
 536                 len += snprintf(buf, sizeof(smi->buf),
 537                                 "Read failed (reg: 0x%04x)\n", reg);
 538                 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 539         }
 540
 541         len += snprintf(buf, sizeof(smi->buf), "reg = 0x%04x, val = 0x%04x\n",
 542                         reg, t);
 543
 544         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 545 }
 546
 547 static ssize_t rtl8366_write_debugfs_reg(struct file *file,
 548                                           const char __user *user_buf,
 549                                           size_t count, loff_t *ppos)
 550 {
 551         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 552         unsigned long data;
 553         u32 reg = smi->dbg_reg;
 554         int err;
 555         size_t len;
 556         char *buf = smi->buf;
 557
 558         len = min(count, sizeof(smi->buf) - 1);
 559         if (copy_from_user(buf, user_buf, len)) {
 560                 dev_err(smi->parent, "copy from user failed\n");
 561                 return -EFAULT;
 562         }
 563
 564         buf[len] = '\0';
 565         if (len > 0 && buf[len - 1] == '\n')
 566                 buf[len - 1] = '\0';
 567
 568
 569         if (strict_strtoul(buf, 16, &data)) {
 570                 dev_err(smi->parent, "Invalid reg value %s\n", buf);
 571         } else {
 572                 err = rtl8366_smi_write_reg(smi, reg, data);
 573                 if (err) {
 574                         dev_err(smi->parent,
 575                                 "writing reg 0x%04x val 0x%04lx failed\n",
 576                                 reg, data);
 577                 }
 578         }
 579
 580         return count;
 581 }
 582
 583 static ssize_t rtl8366_read_debugfs_mibs(struct file *file,
 584                                          char __user *user_buf,
 585                                          size_t count, loff_t *ppos)
 586 {
 587         struct rtl8366_smi *smi = file->private_data;
 588         int i, j, len = 0;
 589         char *buf = smi->buf;
 590
 591         len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s",
 592                         "Counter");
 593
 594         for (i = 0; i < smi->num_ports; i++) {
 595                 char port_buf[10];
 596
 597                 snprintf(port_buf, sizeof(port_buf), "Port %d", i);
 598                 len += snprintf(buf + len, sizeof(smi->buf) - len, " %12s",
 599                                 port_buf);
 600         }
 601         len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 602
 603         for (i = 0; i < smi->num_mib_counters; i++) {
 604                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s ",
 605                                 smi->mib_counters[i].name);
 606                 for (j = 0; j < smi->num_ports; j++) {
 607                         unsigned long long counter = 0;
 608
 609                         if (!smi->ops->get_mib_counter(smi, i, j, &counter))
 610                                 len += snprintf(buf + len,
 611                                                 sizeof(smi->buf) - len,
 612                                                 "%12llu ", counter);
 613                         else
 614                                 len += snprintf(buf + len,
 615                                                 sizeof(smi->buf) - len,
 616                                                 "%12s ", "error");
 617                 }
 618                 len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 619         }
 620
 621         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 622 }
 623
 624 static const struct file_operations fops_rtl8366_regs = {
 625         .read   = rtl8366_read_debugfs_reg,
 626         .write  = rtl8366_write_debugfs_reg,
 627         .open   = rtl8366_debugfs_open,
 628         .owner  = THIS_MODULE
 629 };
 630
 631 static const struct file_operations fops_rtl8366_vlan_mc = {
 632         .read   = rtl8366_read_debugfs_vlan_mc,
 633         .open   = rtl8366_debugfs_open,
 634         .owner  = THIS_MODULE
 635 };
 636
 637 static const struct file_operations fops_rtl8366_mibs = {
 638         .read = rtl8366_read_debugfs_mibs,
 639         .open = rtl8366_debugfs_open,
 640         .owner = THIS_MODULE
 641 };
 642
 643 static void rtl8366_debugfs_init(struct rtl8366_smi *smi)
 644 {
 645         struct dentry *node;
 646         struct dentry *root;
 647
 648         if (!smi->debugfs_root)
 649                 smi->debugfs_root = debugfs_create_dir(dev_name(smi->parent),
 650                                                        NULL);
 651
 652         if (!smi->debugfs_root) {
 653                 dev_err(smi->parent, "Unable to create debugfs dir\n");
 654                 return;
 655         }
 656         root = smi->debugfs_root;
 657
 658         node = debugfs_create_x16("reg", S_IRUGO | S_IWUSR, root,
 659                                   &smi->dbg_reg);
 660         if (!node) {
 661                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 662                         "reg");
 663                 return;
 664         }
 665
 666         node = debugfs_create_file("val", S_IRUGO | S_IWUSR, root, smi,
 667                                    &fops_rtl8366_regs);
 668         if (!node) {
 669                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 670                         "val");
 671                 return;
 672         }
 673
 674         node = debugfs_create_file("vlan_mc", S_IRUSR, root, smi,
 675                                    &fops_rtl8366_vlan_mc);
 676         if (!node) {
 677                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 678                         "vlan_mc");
 679                 return;
 680         }
 681
 682         node = debugfs_create_file("mibs", S_IRUSR, smi->debugfs_root, smi,
 683                                    &fops_rtl8366_mibs);
 684         if (!node)
 685                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 686                         "mibs");
 687 }
 688
 689 static void rtl8366_debugfs_remove(struct rtl8366_smi *smi)
 690 {
 691         if (smi->debugfs_root) {
 692                 debugfs_remove_recursive(smi->debugfs_root);
 693                 smi->debugfs_root = NULL;
 694         }
 695 }
 696 #else
 697 static inline void rtl8366_debugfs_init(struct rtl8366_smi *smi) {}
 698 static inline void rtl8366_debugfs_remove(struct rtl8366_smi *smi) {}
 699 #endif /* CONFIG_RTL8366S_PHY_DEBUG_FS */
 700
 701 static int rtl8366_smi_mii_init(struct rtl8366_smi *smi)
 702 {
 703         int ret;
 704         int i;
 705
 706         smi->mii_bus = mdiobus_alloc();
 707         if (smi->mii_bus == NULL) {
 708                 ret = -ENOMEM;
 709                 goto err;
 710         }
 711
 712         smi->mii_bus->priv = (void *) smi;
 713         smi->mii_bus->name = dev_name(smi->parent);
 714         smi->mii_bus->read = smi->ops->mii_read;
 715         smi->mii_bus->write = smi->ops->mii_write;
 716         snprintf(smi->mii_bus->id, MII_BUS_ID_SIZE, "%s",
 717                  dev_name(smi->parent));
 718         smi->mii_bus->parent = smi->parent;
 719         smi->mii_bus->phy_mask = ~(0x1f);
 720         smi->mii_bus->irq = smi->mii_irq;
 721         for (i = 0; i < PHY_MAX_ADDR; i++)
 722                 smi->mii_irq[i] = PHY_POLL;
 723
 724         ret = mdiobus_register(smi->mii_bus);
 725         if (ret)
 726                 goto err_free;
 727
 728         return 0;
 729
 730  err_free:
 731         mdiobus_free(smi->mii_bus);
 732  err:
 733         return ret;
 734 }
 735
 736 static void rtl8366_smi_mii_cleanup(struct rtl8366_smi *smi)
 737 {
 738         mdiobus_unregister(smi->mii_bus);
 739         mdiobus_free(smi->mii_bus);
 740 }
 741
 742 int rtl8366_sw_get_port_pvid(struct switch_dev *dev, int port, int *val)
 743 {
 744         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 745         return rtl8366_get_pvid(smi, port, val);
 746 }
 747 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_pvid);
 748
 749 int rtl8366_sw_set_port_pvid(struct switch_dev *dev, int port, int val)
 750 {
 751         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 752         return rtl8366_set_pvid(smi, port, val);
 753 }
 754 EXPORT_SYMBOL_GPL(rtl8366_sw_set_port_pvid);
 755
 756 int rtl8366_sw_get_port_mib(struct switch_dev *dev,
 757                             const struct switch_attr *attr,
 758                             struct switch_val *val)
 759 {
 760         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 761         int i, len = 0;
 762         unsigned long long counter = 0;
 763         char *buf = smi->buf;
 764
 765         if (val->port_vlan >= smi->num_ports)
 766                 return -EINVAL;
 767
 768         len += snprintf(buf + len, sizeof(smi->buf) - len,
 769                         "Port %d MIB counters\n",
 770                         val->port_vlan);
 771
 772         for (i = 0; i < smi->num_mib_counters; ++i) {
 773                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 774                                 "%-36s: ", smi->mib_counters[i].name);
 775                 if (!smi->ops->get_mib_counter(smi, i, val->port_vlan,
 776                                                &counter))
 777                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 778                                         "%llu\n", counter);
 779                 else
 780                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 781                                         "%s\n", "error");
 782         }
 783
 784         val->value.s = buf;
 785         val->len = len;
 786         return 0;
 787 }
 788 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_mib);
 789
 790 int rtl8366_sw_get_vlan_info(struct switch_dev *dev,
 791                              const struct switch_attr *attr,
 792                              struct switch_val *val)
 793 {
 794         int i;
 795         u32 len = 0;
 796         struct rtl8366_vlan_4k vlan4k;
 797         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 798         char *buf = smi->buf;
 799         int err;
 800
 801         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 802                 return -EINVAL;
 803
 804         memset(buf, '\0', sizeof(smi->buf));
 805
 806         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 807         if (err)
 808                 return err;
 809
 810         len += snprintf(buf + len, sizeof(smi->buf) - len,
 811                         "VLAN %d: Ports: '", vlan4k.vid);
 812
 813         for (i = 0; i < smi->num_ports; i++) {
 814                 if (!(vlan4k.member & (1 << i)))
 815                         continue;
 816
 817                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%d%s", i,
 818                                 (vlan4k.untag & (1 << i)) ? "" : "t");
 819         }
 820
 821         len += snprintf(buf + len, sizeof(smi->buf) - len,
 822                         "', members=%04x, untag=%04x, fid=%u",
 823                         vlan4k.member, vlan4k.untag, vlan4k.fid);
 824
 825         val->value.s = buf;
 826         val->len = len;
 827
 828         return 0;
 829 }
 830 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_info);
 831
 832 int rtl8366_sw_get_vlan_ports(struct switch_dev *dev, struct switch_val *val)
 833 {
 834         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 835         struct switch_port *port;
 836         struct rtl8366_vlan_4k vlan4k;
 837         int i;
 838
 839         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 840                 return -EINVAL;
 841
 842         smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 843
 844         port = &val->value.ports[0];
 845         val->len = 0;
 846         for (i = 0; i < smi->num_ports; i++) {
 847                 if (!(vlan4k.member & BIT(i)))
 848                         continue;
 849
 850                 port->id = i;
 851                 port->flags = (vlan4k.untag & BIT(i)) ?
 852                                         0 : BIT(SWITCH_PORT_FLAG_TAGGED);
 853                 val->len++;
 854                 port++;
 855         }
 856         return 0;
 857 }
 858 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_ports);
 859
 860 int rtl8366_sw_set_vlan_ports(struct switch_dev *dev, struct switch_val *val)
 861 {
 862         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 863         struct switch_port *port;
 864         u32 member = 0;
 865         u32 untag = 0;
 866         int i;
 867
 868         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 869                 return -EINVAL;
 870
 871         port = &val->value.ports[0];
 872         for (i = 0; i < val->len; i++, port++) {
 873                 member |= BIT(port->id);
 874
 875                 if (!(port->flags & BIT(SWITCH_PORT_FLAG_TAGGED)))
 876                         untag |= BIT(port->id);
 877         }
 878
 879         return rtl8366_set_vlan(smi, val->port_vlan, member, untag, 0);
 880 }
 881 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_ports);
 882
 883 struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent)
 884 {
 885         struct rtl8366_smi *smi;
 886
 887         BUG_ON(!parent);
 888
 889         smi = kzalloc(sizeof(*smi), GFP_KERNEL);
 890         if (!smi) {
 891                 dev_err(parent, "no memory for private data\n");
 892                 return NULL;
 893         }
 894
 895         smi->parent = parent;
 896         return smi;
 897 }
 898 EXPORT_SYMBOL_GPL(rtl8366_smi_alloc);
 899
 900 int rtl8366_smi_init(struct rtl8366_smi *smi)
 901 {
 902         int err;
 903
 904         if (!smi->ops)
 905                 return -EINVAL;
 906
 907         err = gpio_request(smi->gpio_sda, dev_name(smi->parent));
 908         if (err) {
 909                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
 910                         smi->gpio_sda, err);
 911                 goto err_out;
 912         }
 913
 914         err = gpio_request(smi->gpio_sck, dev_name(smi->parent));
 915         if (err) {
 916                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
 917                         smi->gpio_sck, err);
 918                 goto err_free_sda;
 919         }
 920
 921         spin_lock_init(&smi->lock);
 922
 923         dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
 924                  smi->gpio_sda, smi->gpio_sck);
 925
 926         err = smi->ops->detect(smi);
 927         if (err) {
 928                 dev_err(smi->parent, "chip detection failed, err=%d\n", err);
 929                 goto err_free_sck;
 930         }
 931
 932         err = smi->ops->setup(smi);
 933         if (err) {
 934                 dev_err(smi->parent, "chip setup failed, err=%d\n", err);
 935                 goto err_free_sck;
 936         }
 937
 938         err = rtl8366_smi_mii_init(smi);
 939         if (err)
 940                 goto err_free_sck;
 941
 942         rtl8366_debugfs_init(smi);
 943
 944         return 0;
 945
 946  err_free_sck:
 947         gpio_free(smi->gpio_sck);
 948  err_free_sda:
 949         gpio_free(smi->gpio_sda);
 950  err_out:
 951         return err;
 952 }
 953 EXPORT_SYMBOL_GPL(rtl8366_smi_init);
 954
 955 void rtl8366_smi_cleanup(struct rtl8366_smi *smi)
 956 {
 957         rtl8366_debugfs_remove(smi);
 958         rtl8366_smi_mii_cleanup(smi);
 959         gpio_free(smi->gpio_sck);
 960         gpio_free(smi->gpio_sda);
 961 }
 962 EXPORT_SYMBOL_GPL(rtl8366_smi_cleanup);
 963
 964 MODULE_DESCRIPTION("Realtek RTL8366 SMI interface driver");
 965 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
 966 MODULE_LICENSE("GPL v2");