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 #define RTL8366_VLAN4K_PAGE_SIZE        64
 565 #define RTL8366_VLAN4K_NUM_PAGES        (4096 / RTL8366_VLAN4K_PAGE_SIZE)
 566
 567 static ssize_t rtl8366_read_debugfs_vlan_4k(struct file *file,
 568                                             char __user *user_buf,
 569                                             size_t count, loff_t *ppos)
 570 {
 571         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 572         int i, len = 0;
 573         int offset;
 574         char *buf = smi->buf;
 575
 576         if (smi->dbg_vlan_4k_page >= RTL8366_VLAN4K_NUM_PAGES) {
 577                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 578                                 "invalid page: %u\n", smi->dbg_vlan_4k_page);
 579                 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 580         }
 581
 582         len += snprintf(buf + len, sizeof(smi->buf) - len,
 583                         "%4s %6s %6s %3s\n",
 584                         "vid", "member", "untag", "fid");
 585
 586         offset = RTL8366_VLAN4K_PAGE_SIZE * smi->dbg_vlan_4k_page;
 587         for (i = 0; i < RTL8366_VLAN4K_PAGE_SIZE; i++) {
 588                 struct rtl8366_vlan_4k vlan4k;
 589
 590                 smi->ops->get_vlan_4k(smi, offset + i, &vlan4k);
 591
 592                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 593                                 "%4d 0x%04x 0x%04x %3d\n",
 594                                 vlan4k.vid, vlan4k.member,
 595                                 vlan4k.untag, vlan4k.fid);
 596         }
 597
 598         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 599 }
 600
 601 static ssize_t rtl8366_read_debugfs_pvid(struct file *file,
 602                                          char __user *user_buf,
 603                                          size_t count, loff_t *ppos)
 604 {
 605         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 606         char *buf = smi->buf;
 607         int len = 0;
 608         int i;
 609
 610         len += snprintf(buf + len, sizeof(smi->buf) - len, "%4s %4s\n",
 611                         "port", "pvid");
 612
 613         for (i = 0; i < smi->num_ports; i++) {
 614                 int pvid;
 615                 int err;
 616
 617                 err = rtl8366_get_pvid(smi, i, &pvid);
 618                 if (err)
 619                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 620                                 "%4d error\n", i);
 621                 else
 622                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 623                                 "%4d %4d\n", i, pvid);
 624         }
 625
 626         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 627 }
 628
 629 static ssize_t rtl8366_read_debugfs_reg(struct file *file,
 630                                          char __user *user_buf,
 631                                          size_t count, loff_t *ppos)
 632 {
 633         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 634         u32 t, reg = smi->dbg_reg;
 635         int err, len = 0;
 636         char *buf = smi->buf;
 637
 638         memset(buf, '\0', sizeof(smi->buf));
 639
 640         err = rtl8366_smi_read_reg(smi, reg, &t);
 641         if (err) {
 642                 len += snprintf(buf, sizeof(smi->buf),
 643                                 "Read failed (reg: 0x%04x)\n", reg);
 644                 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 645         }
 646
 647         len += snprintf(buf, sizeof(smi->buf), "reg = 0x%04x, val = 0x%04x\n",
 648                         reg, t);
 649
 650         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 651 }
 652
 653 static ssize_t rtl8366_write_debugfs_reg(struct file *file,
 654                                           const char __user *user_buf,
 655                                           size_t count, loff_t *ppos)
 656 {
 657         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 658         unsigned long data;
 659         u32 reg = smi->dbg_reg;
 660         int err;
 661         size_t len;
 662         char *buf = smi->buf;
 663
 664         len = min(count, sizeof(smi->buf) - 1);
 665         if (copy_from_user(buf, user_buf, len)) {
 666                 dev_err(smi->parent, "copy from user failed\n");
 667                 return -EFAULT;
 668         }
 669
 670         buf[len] = '\0';
 671         if (len > 0 && buf[len - 1] == '\n')
 672                 buf[len - 1] = '\0';
 673
 674
 675         if (strict_strtoul(buf, 16, &data)) {
 676                 dev_err(smi->parent, "Invalid reg value %s\n", buf);
 677         } else {
 678                 err = rtl8366_smi_write_reg(smi, reg, data);
 679                 if (err) {
 680                         dev_err(smi->parent,
 681                                 "writing reg 0x%04x val 0x%04lx failed\n",
 682                                 reg, data);
 683                 }
 684         }
 685
 686         return count;
 687 }
 688
 689 static ssize_t rtl8366_read_debugfs_mibs(struct file *file,
 690                                          char __user *user_buf,
 691                                          size_t count, loff_t *ppos)
 692 {
 693         struct rtl8366_smi *smi = file->private_data;
 694         int i, j, len = 0;
 695         char *buf = smi->buf;
 696
 697         len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s",
 698                         "Counter");
 699
 700         for (i = 0; i < smi->num_ports; i++) {
 701                 char port_buf[10];
 702
 703                 snprintf(port_buf, sizeof(port_buf), "Port %d", i);
 704                 len += snprintf(buf + len, sizeof(smi->buf) - len, " %12s",
 705                                 port_buf);
 706         }
 707         len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 708
 709         for (i = 0; i < smi->num_mib_counters; i++) {
 710                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s ",
 711                                 smi->mib_counters[i].name);
 712                 for (j = 0; j < smi->num_ports; j++) {
 713                         unsigned long long counter = 0;
 714
 715                         if (!smi->ops->get_mib_counter(smi, i, j, &counter))
 716                                 len += snprintf(buf + len,
 717                                                 sizeof(smi->buf) - len,
 718                                                 "%12llu ", counter);
 719                         else
 720                                 len += snprintf(buf + len,
 721                                                 sizeof(smi->buf) - len,
 722                                                 "%12s ", "error");
 723                 }
 724                 len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 725         }
 726
 727         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 728 }
 729
 730 static const struct file_operations fops_rtl8366_regs = {
 731         .read   = rtl8366_read_debugfs_reg,
 732         .write  = rtl8366_write_debugfs_reg,
 733         .open   = rtl8366_debugfs_open,
 734         .owner  = THIS_MODULE
 735 };
 736
 737 static const struct file_operations fops_rtl8366_vlan_mc = {
 738         .read   = rtl8366_read_debugfs_vlan_mc,
 739         .open   = rtl8366_debugfs_open,
 740         .owner  = THIS_MODULE
 741 };
 742
 743 static const struct file_operations fops_rtl8366_vlan_4k = {
 744         .read   = rtl8366_read_debugfs_vlan_4k,
 745         .open   = rtl8366_debugfs_open,
 746         .owner  = THIS_MODULE
 747 };
 748
 749 static const struct file_operations fops_rtl8366_pvid = {
 750         .read   = rtl8366_read_debugfs_pvid,
 751         .open   = rtl8366_debugfs_open,
 752         .owner  = THIS_MODULE
 753 };
 754
 755 static const struct file_operations fops_rtl8366_mibs = {
 756         .read = rtl8366_read_debugfs_mibs,
 757         .open = rtl8366_debugfs_open,
 758         .owner = THIS_MODULE
 759 };
 760
 761 static void rtl8366_debugfs_init(struct rtl8366_smi *smi)
 762 {
 763         struct dentry *node;
 764         struct dentry *root;
 765
 766         if (!smi->debugfs_root)
 767                 smi->debugfs_root = debugfs_create_dir(dev_name(smi->parent),
 768                                                        NULL);
 769
 770         if (!smi->debugfs_root) {
 771                 dev_err(smi->parent, "Unable to create debugfs dir\n");
 772                 return;
 773         }
 774         root = smi->debugfs_root;
 775
 776         node = debugfs_create_x16("reg", S_IRUGO | S_IWUSR, root,
 777                                   &smi->dbg_reg);
 778         if (!node) {
 779                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 780                         "reg");
 781                 return;
 782         }
 783
 784         node = debugfs_create_file("val", S_IRUGO | S_IWUSR, root, smi,
 785                                    &fops_rtl8366_regs);
 786         if (!node) {
 787                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 788                         "val");
 789                 return;
 790         }
 791
 792         node = debugfs_create_file("vlan_mc", S_IRUSR, root, smi,
 793                                    &fops_rtl8366_vlan_mc);
 794         if (!node) {
 795                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 796                         "vlan_mc");
 797                 return;
 798         }
 799
 800         node = debugfs_create_u8("vlan_4k_page", S_IRUGO | S_IWUSR, root,
 801                                   &smi->dbg_vlan_4k_page);
 802         if (!node) {
 803                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 804                         "vlan_4k_page");
 805                 return;
 806         }
 807
 808         node = debugfs_create_file("vlan_4k", S_IRUSR, root, smi,
 809                                    &fops_rtl8366_vlan_4k);
 810         if (!node) {
 811                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 812                         "vlan_4k");
 813                 return;
 814         }
 815
 816         node = debugfs_create_file("pvid", S_IRUSR, root, smi,
 817                                    &fops_rtl8366_pvid);
 818         if (!node) {
 819                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 820                         "pvid");
 821                 return;
 822         }
 823
 824         node = debugfs_create_file("mibs", S_IRUSR, smi->debugfs_root, smi,
 825                                    &fops_rtl8366_mibs);
 826         if (!node)
 827                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 828                         "mibs");
 829 }
 830
 831 static void rtl8366_debugfs_remove(struct rtl8366_smi *smi)
 832 {
 833         if (smi->debugfs_root) {
 834                 debugfs_remove_recursive(smi->debugfs_root);
 835                 smi->debugfs_root = NULL;
 836         }
 837 }
 838 #else
 839 static inline void rtl8366_debugfs_init(struct rtl8366_smi *smi) {}
 840 static inline void rtl8366_debugfs_remove(struct rtl8366_smi *smi) {}
 841 #endif /* CONFIG_RTL8366S_PHY_DEBUG_FS */
 842
 843 static int rtl8366_smi_mii_init(struct rtl8366_smi *smi)
 844 {
 845         int ret;
 846         int i;
 847
 848         smi->mii_bus = mdiobus_alloc();
 849         if (smi->mii_bus == NULL) {
 850                 ret = -ENOMEM;
 851                 goto err;
 852         }
 853
 854         smi->mii_bus->priv = (void *) smi;
 855         smi->mii_bus->name = dev_name(smi->parent);
 856         smi->mii_bus->read = smi->ops->mii_read;
 857         smi->mii_bus->write = smi->ops->mii_write;
 858         snprintf(smi->mii_bus->id, MII_BUS_ID_SIZE, "%s",
 859                  dev_name(smi->parent));
 860         smi->mii_bus->parent = smi->parent;
 861         smi->mii_bus->phy_mask = ~(0x1f);
 862         smi->mii_bus->irq = smi->mii_irq;
 863         for (i = 0; i < PHY_MAX_ADDR; i++)
 864                 smi->mii_irq[i] = PHY_POLL;
 865
 866         ret = mdiobus_register(smi->mii_bus);
 867         if (ret)
 868                 goto err_free;
 869
 870         return 0;
 871
 872  err_free:
 873         mdiobus_free(smi->mii_bus);
 874  err:
 875         return ret;
 876 }
 877
 878 static void rtl8366_smi_mii_cleanup(struct rtl8366_smi *smi)
 879 {
 880         mdiobus_unregister(smi->mii_bus);
 881         mdiobus_free(smi->mii_bus);
 882 }
 883
 884 int rtl8366_sw_get_port_pvid(struct switch_dev *dev, int port, int *val)
 885 {
 886         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 887         return rtl8366_get_pvid(smi, port, val);
 888 }
 889 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_pvid);
 890
 891 int rtl8366_sw_set_port_pvid(struct switch_dev *dev, int port, int val)
 892 {
 893         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 894         return rtl8366_set_pvid(smi, port, val);
 895 }
 896 EXPORT_SYMBOL_GPL(rtl8366_sw_set_port_pvid);
 897
 898 int rtl8366_sw_get_port_mib(struct switch_dev *dev,
 899                             const struct switch_attr *attr,
 900                             struct switch_val *val)
 901 {
 902         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 903         int i, len = 0;
 904         unsigned long long counter = 0;
 905         char *buf = smi->buf;
 906
 907         if (val->port_vlan >= smi->num_ports)
 908                 return -EINVAL;
 909
 910         len += snprintf(buf + len, sizeof(smi->buf) - len,
 911                         "Port %d MIB counters\n",
 912                         val->port_vlan);
 913
 914         for (i = 0; i < smi->num_mib_counters; ++i) {
 915                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 916                                 "%-36s: ", smi->mib_counters[i].name);
 917                 if (!smi->ops->get_mib_counter(smi, i, val->port_vlan,
 918                                                &counter))
 919                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 920                                         "%llu\n", counter);
 921                 else
 922                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 923                                         "%s\n", "error");
 924         }
 925
 926         val->value.s = buf;
 927         val->len = len;
 928         return 0;
 929 }
 930 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_mib);
 931
 932 int rtl8366_sw_get_vlan_info(struct switch_dev *dev,
 933                              const struct switch_attr *attr,
 934                              struct switch_val *val)
 935 {
 936         int i;
 937         u32 len = 0;
 938         struct rtl8366_vlan_4k vlan4k;
 939         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 940         char *buf = smi->buf;
 941         int err;
 942
 943         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 944                 return -EINVAL;
 945
 946         memset(buf, '\0', sizeof(smi->buf));
 947
 948         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 949         if (err)
 950                 return err;
 951
 952         len += snprintf(buf + len, sizeof(smi->buf) - len,
 953                         "VLAN %d: Ports: '", vlan4k.vid);
 954
 955         for (i = 0; i < smi->num_ports; i++) {
 956                 if (!(vlan4k.member & (1 << i)))
 957                         continue;
 958
 959                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%d%s", i,
 960                                 (vlan4k.untag & (1 << i)) ? "" : "t");
 961         }
 962
 963         len += snprintf(buf + len, sizeof(smi->buf) - len,
 964                         "', members=%04x, untag=%04x, fid=%u",
 965                         vlan4k.member, vlan4k.untag, vlan4k.fid);
 966
 967         val->value.s = buf;
 968         val->len = len;
 969
 970         return 0;
 971 }
 972 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_info);
 973
 974 int rtl8366_sw_get_vlan_ports(struct switch_dev *dev, struct switch_val *val)
 975 {
 976         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 977         struct switch_port *port;
 978         struct rtl8366_vlan_4k vlan4k;
 979         int i;
 980
 981         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 982                 return -EINVAL;
 983
 984         smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 985
 986         port = &val->value.ports[0];
 987         val->len = 0;
 988         for (i = 0; i < smi->num_ports; i++) {
 989                 if (!(vlan4k.member & BIT(i)))
 990                         continue;
 991
 992                 port->id = i;
 993                 port->flags = (vlan4k.untag & BIT(i)) ?
 994                                         0 : BIT(SWITCH_PORT_FLAG_TAGGED);
 995                 val->len++;
 996                 port++;
 997         }
 998         return 0;
 999 }
1000 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_ports);
1001
1002 int rtl8366_sw_set_vlan_ports(struct switch_dev *dev, struct switch_val *val)
1003 {
1004         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1005         struct switch_port *port;
1006         u32 member = 0;
1007         u32 untag = 0;
1008         int err;
1009         int i;
1010
1011         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1012                 return -EINVAL;
1013
1014         port = &val->value.ports[0];
1015         for (i = 0; i < val->len; i++, port++) {
1016                 member |= BIT(port->id);
1017
1018                 if (!(port->flags & BIT(SWITCH_PORT_FLAG_TAGGED)))
1019                         untag |= BIT(port->id);
1020
1021                 /*
1022                  * To ensure that we have a valid MC entry for this VLAN,
1023                  * initialize the port VLAN ID here.
1024                  */
1025                 err = rtl8366_set_pvid(smi, port->id, val->port_vlan);
1026                 if (err < 0)
1027                         return err;
1028         }
1029
1030         return rtl8366_set_vlan(smi, val->port_vlan, member, untag, 0);
1031 }
1032 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_ports);
1033
1034 int rtl8366_sw_get_vlan_fid(struct switch_dev *dev,
1035                             const struct switch_attr *attr,
1036                             struct switch_val *val)
1037 {
1038         struct rtl8366_vlan_4k vlan4k;
1039         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1040         int err;
1041
1042         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1043                 return -EINVAL;
1044
1045         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
1046         if (err)
1047                 return err;
1048
1049         val->value.i = vlan4k.fid;
1050
1051         return 0;
1052 }
1053 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_fid);
1054
1055 int rtl8366_sw_set_vlan_fid(struct switch_dev *dev,
1056                             const struct switch_attr *attr,
1057                             struct switch_val *val)
1058 {
1059         struct rtl8366_vlan_4k vlan4k;
1060         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1061         int err;
1062
1063         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1064                 return -EINVAL;
1065
1066         if (val->value.i < 0 || val->value.i > attr->max)
1067                 return -EINVAL;
1068
1069         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
1070         if (err)
1071                 return err;
1072
1073         return rtl8366_set_vlan(smi, val->port_vlan,
1074                                 vlan4k.member,
1075                                 vlan4k.untag,
1076                                 val->value.i);
1077 }
1078 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_fid);
1079
1080 int rtl8366_sw_get_vlan_enable(struct switch_dev *dev,
1081                                const struct switch_attr *attr,
1082                                struct switch_val *val)
1083 {
1084         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1085
1086         if (attr->ofs > 2)
1087                 return -EINVAL;
1088
1089         if (attr->ofs == 1)
1090                 val->value.i = smi->vlan_enabled;
1091         else
1092                 val->value.i = smi->vlan4k_enabled;
1093
1094         return 0;
1095 }
1096 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_enable);
1097
1098 int rtl8366_sw_set_vlan_enable(struct switch_dev *dev,
1099                                const struct switch_attr *attr,
1100                                struct switch_val *val)
1101 {
1102         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1103         int err;
1104
1105         if (attr->ofs > 2)
1106                 return -EINVAL;
1107
1108         if (attr->ofs == 1)
1109                 err = rtl8366_enable_vlan(smi, val->value.i);
1110         else
1111                 err = rtl8366_enable_vlan4k(smi, val->value.i);
1112
1113         return err;
1114 }
1115 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_enable);
1116
1117 struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent)
1118 {
1119         struct rtl8366_smi *smi;
1120
1121         BUG_ON(!parent);
1122
1123         smi = kzalloc(sizeof(*smi), GFP_KERNEL);
1124         if (!smi) {
1125                 dev_err(parent, "no memory for private data\n");
1126                 return NULL;
1127         }
1128
1129         smi->parent = parent;
1130         return smi;
1131 }
1132 EXPORT_SYMBOL_GPL(rtl8366_smi_alloc);
1133
1134 int rtl8366_smi_init(struct rtl8366_smi *smi)
1135 {
1136         int err;
1137
1138         if (!smi->ops)
1139                 return -EINVAL;
1140
1141         err = gpio_request(smi->gpio_sda, dev_name(smi->parent));
1142         if (err) {
1143                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1144                         smi->gpio_sda, err);
1145                 goto err_out;
1146         }
1147
1148         err = gpio_request(smi->gpio_sck, dev_name(smi->parent));
1149         if (err) {
1150                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1151                         smi->gpio_sck, err);
1152                 goto err_free_sda;
1153         }
1154
1155         spin_lock_init(&smi->lock);
1156
1157         dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
1158                  smi->gpio_sda, smi->gpio_sck);
1159
1160         err = smi->ops->detect(smi);
1161         if (err) {
1162                 dev_err(smi->parent, "chip detection failed, err=%d\n", err);
1163                 goto err_free_sck;
1164         }
1165
1166         err = smi->ops->setup(smi);
1167         if (err) {
1168                 dev_err(smi->parent, "chip setup failed, err=%d\n", err);
1169                 goto err_free_sck;
1170         }
1171
1172         err = rtl8366_smi_mii_init(smi);
1173         if (err)
1174                 goto err_free_sck;
1175
1176         rtl8366_debugfs_init(smi);
1177
1178         return 0;
1179
1180  err_free_sck:
1181         gpio_free(smi->gpio_sck);
1182  err_free_sda:
1183         gpio_free(smi->gpio_sda);
1184  err_out:
1185         return err;
1186 }
1187 EXPORT_SYMBOL_GPL(rtl8366_smi_init);
1188
1189 void rtl8366_smi_cleanup(struct rtl8366_smi *smi)
1190 {
1191         rtl8366_debugfs_remove(smi);
1192         rtl8366_smi_mii_cleanup(smi);
1193         gpio_free(smi->gpio_sck);
1194         gpio_free(smi->gpio_sda);
1195 }
1196 EXPORT_SYMBOL_GPL(rtl8366_smi_cleanup);
1197
1198 MODULE_DESCRIPTION("Realtek RTL8366 SMI interface driver");
1199 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
1200 MODULE_LICENSE("GPL v2");