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         return 0;
 511 }
 512 EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);
 513
 514 static int rtl8366_init_vlan(struct rtl8366_smi *smi)
 515 {
 516         int port;
 517         int err;
 518
 519         err = rtl8366_reset_vlan(smi);
 520         if (err)
 521                 return err;
 522
 523         for (port = 0; port < smi->num_ports; port++) {
 524                 u32 mask;
 525
 526                 if (port == smi->cpu_port)
 527                         mask = (1 << smi->num_ports) - 1;
 528                 else
 529                         mask = (1 << port) | (1 << smi->cpu_port);
 530
 531                 err = rtl8366_set_vlan(smi, (port + 1), mask, mask, 0);
 532                 if (err)
 533                         return err;
 534
 535                 err = rtl8366_set_pvid(smi, port, (port + 1));
 536                 if (err)
 537                         return err;
 538         }
 539
 540         return rtl8366_enable_vlan(smi, 1);
 541 }
 542
 543 #ifdef CONFIG_RTL8366S_PHY_DEBUG_FS
 544 int rtl8366_debugfs_open(struct inode *inode, struct file *file)
 545 {
 546         file->private_data = inode->i_private;
 547         return 0;
 548 }
 549 EXPORT_SYMBOL_GPL(rtl8366_debugfs_open);
 550
 551 static ssize_t rtl8366_read_debugfs_vlan_mc(struct file *file,
 552                                               char __user *user_buf,
 553                                               size_t count, loff_t *ppos)
 554 {
 555         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 556         int i, len = 0;
 557         char *buf = smi->buf;
 558
 559         len += snprintf(buf + len, sizeof(smi->buf) - len,
 560                         "%2s %6s %4s %6s %6s %3s\n",
 561                         "id", "vid","prio", "member", "untag", "fid");
 562
 563         for (i = 0; i < smi->num_vlan_mc; ++i) {
 564                 struct rtl8366_vlan_mc vlanmc;
 565
 566                 smi->ops->get_vlan_mc(smi, i, &vlanmc);
 567
 568                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 569                                 "%2d %6d %4d 0x%04x 0x%04x %3d\n",
 570                                 i, vlanmc.vid, vlanmc.priority,
 571                                 vlanmc.member, vlanmc.untag, vlanmc.fid);
 572         }
 573
 574         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 575 }
 576
 577 #define RTL8366_VLAN4K_PAGE_SIZE        64
 578 #define RTL8366_VLAN4K_NUM_PAGES        (4096 / RTL8366_VLAN4K_PAGE_SIZE)
 579
 580 static ssize_t rtl8366_read_debugfs_vlan_4k(struct file *file,
 581                                             char __user *user_buf,
 582                                             size_t count, loff_t *ppos)
 583 {
 584         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 585         int i, len = 0;
 586         int offset;
 587         char *buf = smi->buf;
 588
 589         if (smi->dbg_vlan_4k_page >= RTL8366_VLAN4K_NUM_PAGES) {
 590                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 591                                 "invalid page: %u\n", smi->dbg_vlan_4k_page);
 592                 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 593         }
 594
 595         len += snprintf(buf + len, sizeof(smi->buf) - len,
 596                         "%4s %6s %6s %3s\n",
 597                         "vid", "member", "untag", "fid");
 598
 599         offset = RTL8366_VLAN4K_PAGE_SIZE * smi->dbg_vlan_4k_page;
 600         for (i = 0; i < RTL8366_VLAN4K_PAGE_SIZE; i++) {
 601                 struct rtl8366_vlan_4k vlan4k;
 602
 603                 smi->ops->get_vlan_4k(smi, offset + i, &vlan4k);
 604
 605                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 606                                 "%4d 0x%04x 0x%04x %3d\n",
 607                                 vlan4k.vid, vlan4k.member,
 608                                 vlan4k.untag, vlan4k.fid);
 609         }
 610
 611         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 612 }
 613
 614 static ssize_t rtl8366_read_debugfs_pvid(struct file *file,
 615                                          char __user *user_buf,
 616                                          size_t count, loff_t *ppos)
 617 {
 618         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 619         char *buf = smi->buf;
 620         int len = 0;
 621         int i;
 622
 623         len += snprintf(buf + len, sizeof(smi->buf) - len, "%4s %4s\n",
 624                         "port", "pvid");
 625
 626         for (i = 0; i < smi->num_ports; i++) {
 627                 int pvid;
 628                 int err;
 629
 630                 err = rtl8366_get_pvid(smi, i, &pvid);
 631                 if (err)
 632                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 633                                 "%4d error\n", i);
 634                 else
 635                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 636                                 "%4d %4d\n", i, pvid);
 637         }
 638
 639         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 640 }
 641
 642 static ssize_t rtl8366_read_debugfs_reg(struct file *file,
 643                                          char __user *user_buf,
 644                                          size_t count, loff_t *ppos)
 645 {
 646         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 647         u32 t, reg = smi->dbg_reg;
 648         int err, len = 0;
 649         char *buf = smi->buf;
 650
 651         memset(buf, '\0', sizeof(smi->buf));
 652
 653         err = rtl8366_smi_read_reg(smi, reg, &t);
 654         if (err) {
 655                 len += snprintf(buf, sizeof(smi->buf),
 656                                 "Read failed (reg: 0x%04x)\n", reg);
 657                 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 658         }
 659
 660         len += snprintf(buf, sizeof(smi->buf), "reg = 0x%04x, val = 0x%04x\n",
 661                         reg, t);
 662
 663         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 664 }
 665
 666 static ssize_t rtl8366_write_debugfs_reg(struct file *file,
 667                                           const char __user *user_buf,
 668                                           size_t count, loff_t *ppos)
 669 {
 670         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 671         unsigned long data;
 672         u32 reg = smi->dbg_reg;
 673         int err;
 674         size_t len;
 675         char *buf = smi->buf;
 676
 677         len = min(count, sizeof(smi->buf) - 1);
 678         if (copy_from_user(buf, user_buf, len)) {
 679                 dev_err(smi->parent, "copy from user failed\n");
 680                 return -EFAULT;
 681         }
 682
 683         buf[len] = '\0';
 684         if (len > 0 && buf[len - 1] == '\n')
 685                 buf[len - 1] = '\0';
 686
 687
 688         if (strict_strtoul(buf, 16, &data)) {
 689                 dev_err(smi->parent, "Invalid reg value %s\n", buf);
 690         } else {
 691                 err = rtl8366_smi_write_reg(smi, reg, data);
 692                 if (err) {
 693                         dev_err(smi->parent,
 694                                 "writing reg 0x%04x val 0x%04lx failed\n",
 695                                 reg, data);
 696                 }
 697         }
 698
 699         return count;
 700 }
 701
 702 static ssize_t rtl8366_read_debugfs_mibs(struct file *file,
 703                                          char __user *user_buf,
 704                                          size_t count, loff_t *ppos)
 705 {
 706         struct rtl8366_smi *smi = file->private_data;
 707         int i, j, len = 0;
 708         char *buf = smi->buf;
 709
 710         len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s",
 711                         "Counter");
 712
 713         for (i = 0; i < smi->num_ports; i++) {
 714                 char port_buf[10];
 715
 716                 snprintf(port_buf, sizeof(port_buf), "Port %d", i);
 717                 len += snprintf(buf + len, sizeof(smi->buf) - len, " %12s",
 718                                 port_buf);
 719         }
 720         len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 721
 722         for (i = 0; i < smi->num_mib_counters; i++) {
 723                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s ",
 724                                 smi->mib_counters[i].name);
 725                 for (j = 0; j < smi->num_ports; j++) {
 726                         unsigned long long counter = 0;
 727
 728                         if (!smi->ops->get_mib_counter(smi, i, j, &counter))
 729                                 len += snprintf(buf + len,
 730                                                 sizeof(smi->buf) - len,
 731                                                 "%12llu ", counter);
 732                         else
 733                                 len += snprintf(buf + len,
 734                                                 sizeof(smi->buf) - len,
 735                                                 "%12s ", "error");
 736                 }
 737                 len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 738         }
 739
 740         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 741 }
 742
 743 static const struct file_operations fops_rtl8366_regs = {
 744         .read   = rtl8366_read_debugfs_reg,
 745         .write  = rtl8366_write_debugfs_reg,
 746         .open   = rtl8366_debugfs_open,
 747         .owner  = THIS_MODULE
 748 };
 749
 750 static const struct file_operations fops_rtl8366_vlan_mc = {
 751         .read   = rtl8366_read_debugfs_vlan_mc,
 752         .open   = rtl8366_debugfs_open,
 753         .owner  = THIS_MODULE
 754 };
 755
 756 static const struct file_operations fops_rtl8366_vlan_4k = {
 757         .read   = rtl8366_read_debugfs_vlan_4k,
 758         .open   = rtl8366_debugfs_open,
 759         .owner  = THIS_MODULE
 760 };
 761
 762 static const struct file_operations fops_rtl8366_pvid = {
 763         .read   = rtl8366_read_debugfs_pvid,
 764         .open   = rtl8366_debugfs_open,
 765         .owner  = THIS_MODULE
 766 };
 767
 768 static const struct file_operations fops_rtl8366_mibs = {
 769         .read = rtl8366_read_debugfs_mibs,
 770         .open = rtl8366_debugfs_open,
 771         .owner = THIS_MODULE
 772 };
 773
 774 static void rtl8366_debugfs_init(struct rtl8366_smi *smi)
 775 {
 776         struct dentry *node;
 777         struct dentry *root;
 778
 779         if (!smi->debugfs_root)
 780                 smi->debugfs_root = debugfs_create_dir(dev_name(smi->parent),
 781                                                        NULL);
 782
 783         if (!smi->debugfs_root) {
 784                 dev_err(smi->parent, "Unable to create debugfs dir\n");
 785                 return;
 786         }
 787         root = smi->debugfs_root;
 788
 789         node = debugfs_create_x16("reg", S_IRUGO | S_IWUSR, root,
 790                                   &smi->dbg_reg);
 791         if (!node) {
 792                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 793                         "reg");
 794                 return;
 795         }
 796
 797         node = debugfs_create_file("val", S_IRUGO | S_IWUSR, root, smi,
 798                                    &fops_rtl8366_regs);
 799         if (!node) {
 800                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 801                         "val");
 802                 return;
 803         }
 804
 805         node = debugfs_create_file("vlan_mc", S_IRUSR, root, smi,
 806                                    &fops_rtl8366_vlan_mc);
 807         if (!node) {
 808                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 809                         "vlan_mc");
 810                 return;
 811         }
 812
 813         node = debugfs_create_u8("vlan_4k_page", S_IRUGO | S_IWUSR, root,
 814                                   &smi->dbg_vlan_4k_page);
 815         if (!node) {
 816                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 817                         "vlan_4k_page");
 818                 return;
 819         }
 820
 821         node = debugfs_create_file("vlan_4k", S_IRUSR, root, smi,
 822                                    &fops_rtl8366_vlan_4k);
 823         if (!node) {
 824                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 825                         "vlan_4k");
 826                 return;
 827         }
 828
 829         node = debugfs_create_file("pvid", S_IRUSR, root, smi,
 830                                    &fops_rtl8366_pvid);
 831         if (!node) {
 832                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 833                         "pvid");
 834                 return;
 835         }
 836
 837         node = debugfs_create_file("mibs", S_IRUSR, smi->debugfs_root, smi,
 838                                    &fops_rtl8366_mibs);
 839         if (!node)
 840                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 841                         "mibs");
 842 }
 843
 844 static void rtl8366_debugfs_remove(struct rtl8366_smi *smi)
 845 {
 846         if (smi->debugfs_root) {
 847                 debugfs_remove_recursive(smi->debugfs_root);
 848                 smi->debugfs_root = NULL;
 849         }
 850 }
 851 #else
 852 static inline void rtl8366_debugfs_init(struct rtl8366_smi *smi) {}
 853 static inline void rtl8366_debugfs_remove(struct rtl8366_smi *smi) {}
 854 #endif /* CONFIG_RTL8366S_PHY_DEBUG_FS */
 855
 856 static int rtl8366_smi_mii_init(struct rtl8366_smi *smi)
 857 {
 858         int ret;
 859         int i;
 860
 861         smi->mii_bus = mdiobus_alloc();
 862         if (smi->mii_bus == NULL) {
 863                 ret = -ENOMEM;
 864                 goto err;
 865         }
 866
 867         smi->mii_bus->priv = (void *) smi;
 868         smi->mii_bus->name = dev_name(smi->parent);
 869         smi->mii_bus->read = smi->ops->mii_read;
 870         smi->mii_bus->write = smi->ops->mii_write;
 871         snprintf(smi->mii_bus->id, MII_BUS_ID_SIZE, "%s",
 872                  dev_name(smi->parent));
 873         smi->mii_bus->parent = smi->parent;
 874         smi->mii_bus->phy_mask = ~(0x1f);
 875         smi->mii_bus->irq = smi->mii_irq;
 876         for (i = 0; i < PHY_MAX_ADDR; i++)
 877                 smi->mii_irq[i] = PHY_POLL;
 878
 879         ret = mdiobus_register(smi->mii_bus);
 880         if (ret)
 881                 goto err_free;
 882
 883         return 0;
 884
 885  err_free:
 886         mdiobus_free(smi->mii_bus);
 887  err:
 888         return ret;
 889 }
 890
 891 static void rtl8366_smi_mii_cleanup(struct rtl8366_smi *smi)
 892 {
 893         mdiobus_unregister(smi->mii_bus);
 894         mdiobus_free(smi->mii_bus);
 895 }
 896
 897 int rtl8366_sw_get_port_pvid(struct switch_dev *dev, int port, int *val)
 898 {
 899         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 900         return rtl8366_get_pvid(smi, port, val);
 901 }
 902 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_pvid);
 903
 904 int rtl8366_sw_set_port_pvid(struct switch_dev *dev, int port, int val)
 905 {
 906         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 907         return rtl8366_set_pvid(smi, port, val);
 908 }
 909 EXPORT_SYMBOL_GPL(rtl8366_sw_set_port_pvid);
 910
 911 int rtl8366_sw_get_port_mib(struct switch_dev *dev,
 912                             const struct switch_attr *attr,
 913                             struct switch_val *val)
 914 {
 915         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 916         int i, len = 0;
 917         unsigned long long counter = 0;
 918         char *buf = smi->buf;
 919
 920         if (val->port_vlan >= smi->num_ports)
 921                 return -EINVAL;
 922
 923         len += snprintf(buf + len, sizeof(smi->buf) - len,
 924                         "Port %d MIB counters\n",
 925                         val->port_vlan);
 926
 927         for (i = 0; i < smi->num_mib_counters; ++i) {
 928                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 929                                 "%-36s: ", smi->mib_counters[i].name);
 930                 if (!smi->ops->get_mib_counter(smi, i, val->port_vlan,
 931                                                &counter))
 932                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 933                                         "%llu\n", counter);
 934                 else
 935                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 936                                         "%s\n", "error");
 937         }
 938
 939         val->value.s = buf;
 940         val->len = len;
 941         return 0;
 942 }
 943 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_mib);
 944
 945 int rtl8366_sw_get_vlan_info(struct switch_dev *dev,
 946                              const struct switch_attr *attr,
 947                              struct switch_val *val)
 948 {
 949         int i;
 950         u32 len = 0;
 951         struct rtl8366_vlan_4k vlan4k;
 952         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 953         char *buf = smi->buf;
 954         int err;
 955
 956         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 957                 return -EINVAL;
 958
 959         memset(buf, '\0', sizeof(smi->buf));
 960
 961         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 962         if (err)
 963                 return err;
 964
 965         len += snprintf(buf + len, sizeof(smi->buf) - len,
 966                         "VLAN %d: Ports: '", vlan4k.vid);
 967
 968         for (i = 0; i < smi->num_ports; i++) {
 969                 if (!(vlan4k.member & (1 << i)))
 970                         continue;
 971
 972                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%d%s", i,
 973                                 (vlan4k.untag & (1 << i)) ? "" : "t");
 974         }
 975
 976         len += snprintf(buf + len, sizeof(smi->buf) - len,
 977                         "', members=%04x, untag=%04x, fid=%u",
 978                         vlan4k.member, vlan4k.untag, vlan4k.fid);
 979
 980         val->value.s = buf;
 981         val->len = len;
 982
 983         return 0;
 984 }
 985 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_info);
 986
 987 int rtl8366_sw_get_vlan_ports(struct switch_dev *dev, struct switch_val *val)
 988 {
 989         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 990         struct switch_port *port;
 991         struct rtl8366_vlan_4k vlan4k;
 992         int i;
 993
 994         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 995                 return -EINVAL;
 996
 997         smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 998
 999         port = &val->value.ports[0];
1000         val->len = 0;
1001         for (i = 0; i < smi->num_ports; i++) {
1002                 if (!(vlan4k.member & BIT(i)))
1003                         continue;
1004
1005                 port->id = i;
1006                 port->flags = (vlan4k.untag & BIT(i)) ?
1007                                         0 : BIT(SWITCH_PORT_FLAG_TAGGED);
1008                 val->len++;
1009                 port++;
1010         }
1011         return 0;
1012 }
1013 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_ports);
1014
1015 int rtl8366_sw_set_vlan_ports(struct switch_dev *dev, struct switch_val *val)
1016 {
1017         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1018         struct switch_port *port;
1019         u32 member = 0;
1020         u32 untag = 0;
1021         int err;
1022         int i;
1023
1024         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1025                 return -EINVAL;
1026
1027         port = &val->value.ports[0];
1028         for (i = 0; i < val->len; i++, port++) {
1029                 member |= BIT(port->id);
1030
1031                 if (!(port->flags & BIT(SWITCH_PORT_FLAG_TAGGED)))
1032                         untag |= BIT(port->id);
1033
1034                 /*
1035                  * To ensure that we have a valid MC entry for this VLAN,
1036                  * initialize the port VLAN ID here.
1037                  */
1038                 err = rtl8366_set_pvid(smi, port->id, val->port_vlan);
1039                 if (err < 0)
1040                         return err;
1041         }
1042
1043         return rtl8366_set_vlan(smi, val->port_vlan, member, untag, 0);
1044 }
1045 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_ports);
1046
1047 int rtl8366_sw_get_vlan_fid(struct switch_dev *dev,
1048                             const struct switch_attr *attr,
1049                             struct switch_val *val)
1050 {
1051         struct rtl8366_vlan_4k vlan4k;
1052         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1053         int err;
1054
1055         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1056                 return -EINVAL;
1057
1058         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
1059         if (err)
1060                 return err;
1061
1062         val->value.i = vlan4k.fid;
1063
1064         return 0;
1065 }
1066 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_fid);
1067
1068 int rtl8366_sw_set_vlan_fid(struct switch_dev *dev,
1069                             const struct switch_attr *attr,
1070                             struct switch_val *val)
1071 {
1072         struct rtl8366_vlan_4k vlan4k;
1073         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1074         int err;
1075
1076         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1077                 return -EINVAL;
1078
1079         if (val->value.i < 0 || val->value.i > attr->max)
1080                 return -EINVAL;
1081
1082         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
1083         if (err)
1084                 return err;
1085
1086         return rtl8366_set_vlan(smi, val->port_vlan,
1087                                 vlan4k.member,
1088                                 vlan4k.untag,
1089                                 val->value.i);
1090 }
1091 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_fid);
1092
1093 int rtl8366_sw_get_vlan_enable(struct switch_dev *dev,
1094                                const struct switch_attr *attr,
1095                                struct switch_val *val)
1096 {
1097         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1098
1099         if (attr->ofs > 2)
1100                 return -EINVAL;
1101
1102         if (attr->ofs == 1)
1103                 val->value.i = smi->vlan_enabled;
1104         else
1105                 val->value.i = smi->vlan4k_enabled;
1106
1107         return 0;
1108 }
1109 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_enable);
1110
1111 int rtl8366_sw_set_vlan_enable(struct switch_dev *dev,
1112                                const struct switch_attr *attr,
1113                                struct switch_val *val)
1114 {
1115         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1116         int err;
1117
1118         if (attr->ofs > 2)
1119                 return -EINVAL;
1120
1121         if (attr->ofs == 1)
1122                 err = rtl8366_enable_vlan(smi, val->value.i);
1123         else
1124                 err = rtl8366_enable_vlan4k(smi, val->value.i);
1125
1126         return err;
1127 }
1128 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_enable);
1129
1130 struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent)
1131 {
1132         struct rtl8366_smi *smi;
1133
1134         BUG_ON(!parent);
1135
1136         smi = kzalloc(sizeof(*smi), GFP_KERNEL);
1137         if (!smi) {
1138                 dev_err(parent, "no memory for private data\n");
1139                 return NULL;
1140         }
1141
1142         smi->parent = parent;
1143         return smi;
1144 }
1145 EXPORT_SYMBOL_GPL(rtl8366_smi_alloc);
1146
1147 int rtl8366_smi_init(struct rtl8366_smi *smi)
1148 {
1149         int err;
1150
1151         if (!smi->ops)
1152                 return -EINVAL;
1153
1154         err = gpio_request(smi->gpio_sda, dev_name(smi->parent));
1155         if (err) {
1156                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1157                         smi->gpio_sda, err);
1158                 goto err_out;
1159         }
1160
1161         err = gpio_request(smi->gpio_sck, dev_name(smi->parent));
1162         if (err) {
1163                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1164                         smi->gpio_sck, err);
1165                 goto err_free_sda;
1166         }
1167
1168         spin_lock_init(&smi->lock);
1169
1170         dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
1171                  smi->gpio_sda, smi->gpio_sck);
1172
1173         err = smi->ops->detect(smi);
1174         if (err) {
1175                 dev_err(smi->parent, "chip detection failed, err=%d\n", err);
1176                 goto err_free_sck;
1177         }
1178
1179         err = smi->ops->setup(smi);
1180         if (err) {
1181                 dev_err(smi->parent, "chip setup failed, err=%d\n", err);
1182                 goto err_free_sck;
1183         }
1184
1185         err = rtl8366_init_vlan(smi);
1186         if (err) {
1187                 dev_err(smi->parent, "VLAN initialization failed, err=%d\n",
1188                         err);
1189                 goto err_disable_hw;
1190         }
1191
1192         err = rtl8366_smi_mii_init(smi);
1193         if (err)
1194                 goto err_free_sck;
1195
1196         rtl8366_debugfs_init(smi);
1197
1198         return 0;
1199
1200  err_free_sck:
1201         gpio_free(smi->gpio_sck);
1202  err_free_sda:
1203         gpio_free(smi->gpio_sda);
1204  err_out:
1205         return err;
1206 }
1207 EXPORT_SYMBOL_GPL(rtl8366_smi_init);
1208
1209 void rtl8366_smi_cleanup(struct rtl8366_smi *smi)
1210 {
1211         rtl8366_debugfs_remove(smi);
1212         rtl8366_smi_mii_cleanup(smi);
1213         gpio_free(smi->gpio_sck);
1214         gpio_free(smi->gpio_sda);
1215 }
1216 EXPORT_SYMBOL_GPL(rtl8366_smi_cleanup);
1217
1218 MODULE_DESCRIPTION("Realtek RTL8366 SMI interface driver");
1219 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
1220 MODULE_LICENSE("GPL v2");