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_enable_all_ports(struct rtl8366_smi *smi, int enable)
 490 {
 491         int port;
 492         int err;
 493
 494         for (port = 0; port < smi->num_ports; port++) {
 495                 err = smi->ops->enable_port(smi, port, enable);
 496                 if (err)
 497                         return err;
 498         }
 499
 500         return 0;
 501 }
 502 EXPORT_SYMBOL_GPL(rtl8366_enable_all_ports);
 503
 504 int rtl8366_reset_vlan(struct rtl8366_smi *smi)
 505 {
 506         struct rtl8366_vlan_mc vlanmc;
 507         int err;
 508         int i;
 509
 510         rtl8366_enable_vlan(smi, 0);
 511         rtl8366_enable_vlan4k(smi, 0);
 512
 513         /* clear VLAN member configurations */
 514         vlanmc.vid = 0;
 515         vlanmc.priority = 0;
 516         vlanmc.member = 0;
 517         vlanmc.untag = 0;
 518         vlanmc.fid = 0;
 519         for (i = 0; i < smi->num_vlan_mc; i++) {
 520                 err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
 521                 if (err)
 522                         return err;
 523         }
 524
 525         return 0;
 526 }
 527 EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);
 528
 529 static int rtl8366_init_vlan(struct rtl8366_smi *smi)
 530 {
 531         int port;
 532         int err;
 533
 534         err = rtl8366_reset_vlan(smi);
 535         if (err)
 536                 return err;
 537
 538         for (port = 0; port < smi->num_ports; port++) {
 539                 u32 mask;
 540
 541                 if (port == smi->cpu_port)
 542                         mask = (1 << smi->num_ports) - 1;
 543                 else
 544                         mask = (1 << port) | (1 << smi->cpu_port);
 545
 546                 err = rtl8366_set_vlan(smi, (port + 1), mask, mask, 0);
 547                 if (err)
 548                         return err;
 549
 550                 err = rtl8366_set_pvid(smi, port, (port + 1));
 551                 if (err)
 552                         return err;
 553         }
 554
 555         return rtl8366_enable_vlan(smi, 1);
 556 }
 557
 558 #ifdef CONFIG_RTL8366S_PHY_DEBUG_FS
 559 int rtl8366_debugfs_open(struct inode *inode, struct file *file)
 560 {
 561         file->private_data = inode->i_private;
 562         return 0;
 563 }
 564 EXPORT_SYMBOL_GPL(rtl8366_debugfs_open);
 565
 566 static ssize_t rtl8366_read_debugfs_vlan_mc(struct file *file,
 567                                               char __user *user_buf,
 568                                               size_t count, loff_t *ppos)
 569 {
 570         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 571         int i, len = 0;
 572         char *buf = smi->buf;
 573
 574         len += snprintf(buf + len, sizeof(smi->buf) - len,
 575                         "%2s %6s %4s %6s %6s %3s\n",
 576                         "id", "vid","prio", "member", "untag", "fid");
 577
 578         for (i = 0; i < smi->num_vlan_mc; ++i) {
 579                 struct rtl8366_vlan_mc vlanmc;
 580
 581                 smi->ops->get_vlan_mc(smi, i, &vlanmc);
 582
 583                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 584                                 "%2d %6d %4d 0x%04x 0x%04x %3d\n",
 585                                 i, vlanmc.vid, vlanmc.priority,
 586                                 vlanmc.member, vlanmc.untag, vlanmc.fid);
 587         }
 588
 589         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 590 }
 591
 592 #define RTL8366_VLAN4K_PAGE_SIZE        64
 593 #define RTL8366_VLAN4K_NUM_PAGES        (4096 / RTL8366_VLAN4K_PAGE_SIZE)
 594
 595 static ssize_t rtl8366_read_debugfs_vlan_4k(struct file *file,
 596                                             char __user *user_buf,
 597                                             size_t count, loff_t *ppos)
 598 {
 599         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 600         int i, len = 0;
 601         int offset;
 602         char *buf = smi->buf;
 603
 604         if (smi->dbg_vlan_4k_page >= RTL8366_VLAN4K_NUM_PAGES) {
 605                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 606                                 "invalid page: %u\n", smi->dbg_vlan_4k_page);
 607                 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 608         }
 609
 610         len += snprintf(buf + len, sizeof(smi->buf) - len,
 611                         "%4s %6s %6s %3s\n",
 612                         "vid", "member", "untag", "fid");
 613
 614         offset = RTL8366_VLAN4K_PAGE_SIZE * smi->dbg_vlan_4k_page;
 615         for (i = 0; i < RTL8366_VLAN4K_PAGE_SIZE; i++) {
 616                 struct rtl8366_vlan_4k vlan4k;
 617
 618                 smi->ops->get_vlan_4k(smi, offset + i, &vlan4k);
 619
 620                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 621                                 "%4d 0x%04x 0x%04x %3d\n",
 622                                 vlan4k.vid, vlan4k.member,
 623                                 vlan4k.untag, vlan4k.fid);
 624         }
 625
 626         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 627 }
 628
 629 static ssize_t rtl8366_read_debugfs_pvid(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         char *buf = smi->buf;
 635         int len = 0;
 636         int i;
 637
 638         len += snprintf(buf + len, sizeof(smi->buf) - len, "%4s %4s\n",
 639                         "port", "pvid");
 640
 641         for (i = 0; i < smi->num_ports; i++) {
 642                 int pvid;
 643                 int err;
 644
 645                 err = rtl8366_get_pvid(smi, i, &pvid);
 646                 if (err)
 647                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 648                                 "%4d error\n", i);
 649                 else
 650                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 651                                 "%4d %4d\n", i, pvid);
 652         }
 653
 654         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 655 }
 656
 657 static ssize_t rtl8366_read_debugfs_reg(struct file *file,
 658                                          char __user *user_buf,
 659                                          size_t count, loff_t *ppos)
 660 {
 661         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 662         u32 t, reg = smi->dbg_reg;
 663         int err, len = 0;
 664         char *buf = smi->buf;
 665
 666         memset(buf, '\0', sizeof(smi->buf));
 667
 668         err = rtl8366_smi_read_reg(smi, reg, &t);
 669         if (err) {
 670                 len += snprintf(buf, sizeof(smi->buf),
 671                                 "Read failed (reg: 0x%04x)\n", reg);
 672                 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 673         }
 674
 675         len += snprintf(buf, sizeof(smi->buf), "reg = 0x%04x, val = 0x%04x\n",
 676                         reg, t);
 677
 678         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 679 }
 680
 681 static ssize_t rtl8366_write_debugfs_reg(struct file *file,
 682                                           const char __user *user_buf,
 683                                           size_t count, loff_t *ppos)
 684 {
 685         struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
 686         unsigned long data;
 687         u32 reg = smi->dbg_reg;
 688         int err;
 689         size_t len;
 690         char *buf = smi->buf;
 691
 692         len = min(count, sizeof(smi->buf) - 1);
 693         if (copy_from_user(buf, user_buf, len)) {
 694                 dev_err(smi->parent, "copy from user failed\n");
 695                 return -EFAULT;
 696         }
 697
 698         buf[len] = '\0';
 699         if (len > 0 && buf[len - 1] == '\n')
 700                 buf[len - 1] = '\0';
 701
 702
 703         if (strict_strtoul(buf, 16, &data)) {
 704                 dev_err(smi->parent, "Invalid reg value %s\n", buf);
 705         } else {
 706                 err = rtl8366_smi_write_reg(smi, reg, data);
 707                 if (err) {
 708                         dev_err(smi->parent,
 709                                 "writing reg 0x%04x val 0x%04lx failed\n",
 710                                 reg, data);
 711                 }
 712         }
 713
 714         return count;
 715 }
 716
 717 static ssize_t rtl8366_read_debugfs_mibs(struct file *file,
 718                                          char __user *user_buf,
 719                                          size_t count, loff_t *ppos)
 720 {
 721         struct rtl8366_smi *smi = file->private_data;
 722         int i, j, len = 0;
 723         char *buf = smi->buf;
 724
 725         len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s",
 726                         "Counter");
 727
 728         for (i = 0; i < smi->num_ports; i++) {
 729                 char port_buf[10];
 730
 731                 snprintf(port_buf, sizeof(port_buf), "Port %d", i);
 732                 len += snprintf(buf + len, sizeof(smi->buf) - len, " %12s",
 733                                 port_buf);
 734         }
 735         len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 736
 737         for (i = 0; i < smi->num_mib_counters; i++) {
 738                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s ",
 739                                 smi->mib_counters[i].name);
 740                 for (j = 0; j < smi->num_ports; j++) {
 741                         unsigned long long counter = 0;
 742
 743                         if (!smi->ops->get_mib_counter(smi, i, j, &counter))
 744                                 len += snprintf(buf + len,
 745                                                 sizeof(smi->buf) - len,
 746                                                 "%12llu ", counter);
 747                         else
 748                                 len += snprintf(buf + len,
 749                                                 sizeof(smi->buf) - len,
 750                                                 "%12s ", "error");
 751                 }
 752                 len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
 753         }
 754
 755         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 756 }
 757
 758 static const struct file_operations fops_rtl8366_regs = {
 759         .read   = rtl8366_read_debugfs_reg,
 760         .write  = rtl8366_write_debugfs_reg,
 761         .open   = rtl8366_debugfs_open,
 762         .owner  = THIS_MODULE
 763 };
 764
 765 static const struct file_operations fops_rtl8366_vlan_mc = {
 766         .read   = rtl8366_read_debugfs_vlan_mc,
 767         .open   = rtl8366_debugfs_open,
 768         .owner  = THIS_MODULE
 769 };
 770
 771 static const struct file_operations fops_rtl8366_vlan_4k = {
 772         .read   = rtl8366_read_debugfs_vlan_4k,
 773         .open   = rtl8366_debugfs_open,
 774         .owner  = THIS_MODULE
 775 };
 776
 777 static const struct file_operations fops_rtl8366_pvid = {
 778         .read   = rtl8366_read_debugfs_pvid,
 779         .open   = rtl8366_debugfs_open,
 780         .owner  = THIS_MODULE
 781 };
 782
 783 static const struct file_operations fops_rtl8366_mibs = {
 784         .read = rtl8366_read_debugfs_mibs,
 785         .open = rtl8366_debugfs_open,
 786         .owner = THIS_MODULE
 787 };
 788
 789 static void rtl8366_debugfs_init(struct rtl8366_smi *smi)
 790 {
 791         struct dentry *node;
 792         struct dentry *root;
 793
 794         if (!smi->debugfs_root)
 795                 smi->debugfs_root = debugfs_create_dir(dev_name(smi->parent),
 796                                                        NULL);
 797
 798         if (!smi->debugfs_root) {
 799                 dev_err(smi->parent, "Unable to create debugfs dir\n");
 800                 return;
 801         }
 802         root = smi->debugfs_root;
 803
 804         node = debugfs_create_x16("reg", S_IRUGO | S_IWUSR, root,
 805                                   &smi->dbg_reg);
 806         if (!node) {
 807                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 808                         "reg");
 809                 return;
 810         }
 811
 812         node = debugfs_create_file("val", S_IRUGO | S_IWUSR, root, smi,
 813                                    &fops_rtl8366_regs);
 814         if (!node) {
 815                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 816                         "val");
 817                 return;
 818         }
 819
 820         node = debugfs_create_file("vlan_mc", S_IRUSR, root, smi,
 821                                    &fops_rtl8366_vlan_mc);
 822         if (!node) {
 823                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 824                         "vlan_mc");
 825                 return;
 826         }
 827
 828         node = debugfs_create_u8("vlan_4k_page", S_IRUGO | S_IWUSR, root,
 829                                   &smi->dbg_vlan_4k_page);
 830         if (!node) {
 831                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 832                         "vlan_4k_page");
 833                 return;
 834         }
 835
 836         node = debugfs_create_file("vlan_4k", S_IRUSR, root, smi,
 837                                    &fops_rtl8366_vlan_4k);
 838         if (!node) {
 839                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 840                         "vlan_4k");
 841                 return;
 842         }
 843
 844         node = debugfs_create_file("pvid", S_IRUSR, root, smi,
 845                                    &fops_rtl8366_pvid);
 846         if (!node) {
 847                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 848                         "pvid");
 849                 return;
 850         }
 851
 852         node = debugfs_create_file("mibs", S_IRUSR, smi->debugfs_root, smi,
 853                                    &fops_rtl8366_mibs);
 854         if (!node)
 855                 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
 856                         "mibs");
 857 }
 858
 859 static void rtl8366_debugfs_remove(struct rtl8366_smi *smi)
 860 {
 861         if (smi->debugfs_root) {
 862                 debugfs_remove_recursive(smi->debugfs_root);
 863                 smi->debugfs_root = NULL;
 864         }
 865 }
 866 #else
 867 static inline void rtl8366_debugfs_init(struct rtl8366_smi *smi) {}
 868 static inline void rtl8366_debugfs_remove(struct rtl8366_smi *smi) {}
 869 #endif /* CONFIG_RTL8366S_PHY_DEBUG_FS */
 870
 871 static int rtl8366_smi_mii_init(struct rtl8366_smi *smi)
 872 {
 873         int ret;
 874         int i;
 875
 876         smi->mii_bus = mdiobus_alloc();
 877         if (smi->mii_bus == NULL) {
 878                 ret = -ENOMEM;
 879                 goto err;
 880         }
 881
 882         smi->mii_bus->priv = (void *) smi;
 883         smi->mii_bus->name = dev_name(smi->parent);
 884         smi->mii_bus->read = smi->ops->mii_read;
 885         smi->mii_bus->write = smi->ops->mii_write;
 886         snprintf(smi->mii_bus->id, MII_BUS_ID_SIZE, "%s",
 887                  dev_name(smi->parent));
 888         smi->mii_bus->parent = smi->parent;
 889         smi->mii_bus->phy_mask = ~(0x1f);
 890         smi->mii_bus->irq = smi->mii_irq;
 891         for (i = 0; i < PHY_MAX_ADDR; i++)
 892                 smi->mii_irq[i] = PHY_POLL;
 893
 894         ret = mdiobus_register(smi->mii_bus);
 895         if (ret)
 896                 goto err_free;
 897
 898         return 0;
 899
 900  err_free:
 901         mdiobus_free(smi->mii_bus);
 902  err:
 903         return ret;
 904 }
 905
 906 static void rtl8366_smi_mii_cleanup(struct rtl8366_smi *smi)
 907 {
 908         mdiobus_unregister(smi->mii_bus);
 909         mdiobus_free(smi->mii_bus);
 910 }
 911
 912 int rtl8366_sw_get_port_pvid(struct switch_dev *dev, int port, int *val)
 913 {
 914         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 915         return rtl8366_get_pvid(smi, port, val);
 916 }
 917 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_pvid);
 918
 919 int rtl8366_sw_set_port_pvid(struct switch_dev *dev, int port, int val)
 920 {
 921         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 922         return rtl8366_set_pvid(smi, port, val);
 923 }
 924 EXPORT_SYMBOL_GPL(rtl8366_sw_set_port_pvid);
 925
 926 int rtl8366_sw_get_port_mib(struct switch_dev *dev,
 927                             const struct switch_attr *attr,
 928                             struct switch_val *val)
 929 {
 930         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 931         int i, len = 0;
 932         unsigned long long counter = 0;
 933         char *buf = smi->buf;
 934
 935         if (val->port_vlan >= smi->num_ports)
 936                 return -EINVAL;
 937
 938         len += snprintf(buf + len, sizeof(smi->buf) - len,
 939                         "Port %d MIB counters\n",
 940                         val->port_vlan);
 941
 942         for (i = 0; i < smi->num_mib_counters; ++i) {
 943                 len += snprintf(buf + len, sizeof(smi->buf) - len,
 944                                 "%-36s: ", smi->mib_counters[i].name);
 945                 if (!smi->ops->get_mib_counter(smi, i, val->port_vlan,
 946                                                &counter))
 947                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 948                                         "%llu\n", counter);
 949                 else
 950                         len += snprintf(buf + len, sizeof(smi->buf) - len,
 951                                         "%s\n", "error");
 952         }
 953
 954         val->value.s = buf;
 955         val->len = len;
 956         return 0;
 957 }
 958 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_mib);
 959
 960 int rtl8366_sw_get_vlan_info(struct switch_dev *dev,
 961                              const struct switch_attr *attr,
 962                              struct switch_val *val)
 963 {
 964         int i;
 965         u32 len = 0;
 966         struct rtl8366_vlan_4k vlan4k;
 967         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
 968         char *buf = smi->buf;
 969         int err;
 970
 971         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
 972                 return -EINVAL;
 973
 974         memset(buf, '\0', sizeof(smi->buf));
 975
 976         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
 977         if (err)
 978                 return err;
 979
 980         len += snprintf(buf + len, sizeof(smi->buf) - len,
 981                         "VLAN %d: Ports: '", vlan4k.vid);
 982
 983         for (i = 0; i < smi->num_ports; i++) {
 984                 if (!(vlan4k.member & (1 << i)))
 985                         continue;
 986
 987                 len += snprintf(buf + len, sizeof(smi->buf) - len, "%d%s", i,
 988                                 (vlan4k.untag & (1 << i)) ? "" : "t");
 989         }
 990
 991         len += snprintf(buf + len, sizeof(smi->buf) - len,
 992                         "', members=%04x, untag=%04x, fid=%u",
 993                         vlan4k.member, vlan4k.untag, vlan4k.fid);
 994
 995         val->value.s = buf;
 996         val->len = len;
 997
 998         return 0;
 999 }
1000 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_info);
1001
1002 int rtl8366_sw_get_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         struct rtl8366_vlan_4k vlan4k;
1007         int i;
1008
1009         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1010                 return -EINVAL;
1011
1012         smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
1013
1014         port = &val->value.ports[0];
1015         val->len = 0;
1016         for (i = 0; i < smi->num_ports; i++) {
1017                 if (!(vlan4k.member & BIT(i)))
1018                         continue;
1019
1020                 port->id = i;
1021                 port->flags = (vlan4k.untag & BIT(i)) ?
1022                                         0 : BIT(SWITCH_PORT_FLAG_TAGGED);
1023                 val->len++;
1024                 port++;
1025         }
1026         return 0;
1027 }
1028 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_ports);
1029
1030 int rtl8366_sw_set_vlan_ports(struct switch_dev *dev, struct switch_val *val)
1031 {
1032         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1033         struct switch_port *port;
1034         u32 member = 0;
1035         u32 untag = 0;
1036         int err;
1037         int i;
1038
1039         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1040                 return -EINVAL;
1041
1042         port = &val->value.ports[0];
1043         for (i = 0; i < val->len; i++, port++) {
1044                 member |= BIT(port->id);
1045
1046                 if (!(port->flags & BIT(SWITCH_PORT_FLAG_TAGGED)))
1047                         untag |= BIT(port->id);
1048
1049                 /*
1050                  * To ensure that we have a valid MC entry for this VLAN,
1051                  * initialize the port VLAN ID here.
1052                  */
1053                 err = rtl8366_set_pvid(smi, port->id, val->port_vlan);
1054                 if (err < 0)
1055                         return err;
1056         }
1057
1058         return rtl8366_set_vlan(smi, val->port_vlan, member, untag, 0);
1059 }
1060 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_ports);
1061
1062 int rtl8366_sw_get_vlan_fid(struct switch_dev *dev,
1063                             const struct switch_attr *attr,
1064                             struct switch_val *val)
1065 {
1066         struct rtl8366_vlan_4k vlan4k;
1067         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1068         int err;
1069
1070         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1071                 return -EINVAL;
1072
1073         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
1074         if (err)
1075                 return err;
1076
1077         val->value.i = vlan4k.fid;
1078
1079         return 0;
1080 }
1081 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_fid);
1082
1083 int rtl8366_sw_set_vlan_fid(struct switch_dev *dev,
1084                             const struct switch_attr *attr,
1085                             struct switch_val *val)
1086 {
1087         struct rtl8366_vlan_4k vlan4k;
1088         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1089         int err;
1090
1091         if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1092                 return -EINVAL;
1093
1094         if (val->value.i < 0 || val->value.i > attr->max)
1095                 return -EINVAL;
1096
1097         err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
1098         if (err)
1099                 return err;
1100
1101         return rtl8366_set_vlan(smi, val->port_vlan,
1102                                 vlan4k.member,
1103                                 vlan4k.untag,
1104                                 val->value.i);
1105 }
1106 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_fid);
1107
1108 int rtl8366_sw_get_vlan_enable(struct switch_dev *dev,
1109                                const struct switch_attr *attr,
1110                                struct switch_val *val)
1111 {
1112         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1113
1114         if (attr->ofs > 2)
1115                 return -EINVAL;
1116
1117         if (attr->ofs == 1)
1118                 val->value.i = smi->vlan_enabled;
1119         else
1120                 val->value.i = smi->vlan4k_enabled;
1121
1122         return 0;
1123 }
1124 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_enable);
1125
1126 int rtl8366_sw_set_vlan_enable(struct switch_dev *dev,
1127                                const struct switch_attr *attr,
1128                                struct switch_val *val)
1129 {
1130         struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1131         int err;
1132
1133         if (attr->ofs > 2)
1134                 return -EINVAL;
1135
1136         if (attr->ofs == 1)
1137                 err = rtl8366_enable_vlan(smi, val->value.i);
1138         else
1139                 err = rtl8366_enable_vlan4k(smi, val->value.i);
1140
1141         return err;
1142 }
1143 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_enable);
1144
1145 struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent)
1146 {
1147         struct rtl8366_smi *smi;
1148
1149         BUG_ON(!parent);
1150
1151         smi = kzalloc(sizeof(*smi), GFP_KERNEL);
1152         if (!smi) {
1153                 dev_err(parent, "no memory for private data\n");
1154                 return NULL;
1155         }
1156
1157         smi->parent = parent;
1158         return smi;
1159 }
1160 EXPORT_SYMBOL_GPL(rtl8366_smi_alloc);
1161
1162 int rtl8366_smi_init(struct rtl8366_smi *smi)
1163 {
1164         int err;
1165
1166         if (!smi->ops)
1167                 return -EINVAL;
1168
1169         err = gpio_request(smi->gpio_sda, dev_name(smi->parent));
1170         if (err) {
1171                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1172                         smi->gpio_sda, err);
1173                 goto err_out;
1174         }
1175
1176         err = gpio_request(smi->gpio_sck, dev_name(smi->parent));
1177         if (err) {
1178                 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1179                         smi->gpio_sck, err);
1180                 goto err_free_sda;
1181         }
1182
1183         spin_lock_init(&smi->lock);
1184
1185         dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
1186                  smi->gpio_sda, smi->gpio_sck);
1187
1188         err = smi->ops->detect(smi);
1189         if (err) {
1190                 dev_err(smi->parent, "chip detection failed, err=%d\n", err);
1191                 goto err_free_sck;
1192         }
1193
1194         err = smi->ops->setup(smi);
1195         if (err) {
1196                 dev_err(smi->parent, "chip setup failed, err=%d\n", err);
1197                 goto err_free_sck;
1198         }
1199
1200         err = rtl8366_init_vlan(smi);
1201         if (err) {
1202                 dev_err(smi->parent, "VLAN initialization failed, err=%d\n",
1203                         err);
1204                 goto err_disable_hw;
1205         }
1206
1207         err = rtl8366_enable_all_ports(smi, 1);
1208         if (err)
1209                 goto err_disable_hw;
1210
1211         err = rtl8366_smi_mii_init(smi);
1212         if (err)
1213                 goto err_free_sck;
1214
1215         rtl8366_debugfs_init(smi);
1216
1217         return 0;
1218
1219  err_free_sck:
1220         gpio_free(smi->gpio_sck);
1221  err_free_sda:
1222         gpio_free(smi->gpio_sda);
1223  err_out:
1224         return err;
1225 }
1226 EXPORT_SYMBOL_GPL(rtl8366_smi_init);
1227
1228 void rtl8366_smi_cleanup(struct rtl8366_smi *smi)
1229 {
1230         rtl8366_debugfs_remove(smi);
1231         rtl8366_smi_mii_cleanup(smi);
1232         gpio_free(smi->gpio_sck);
1233         gpio_free(smi->gpio_sda);
1234 }
1235 EXPORT_SYMBOL_GPL(rtl8366_smi_cleanup);
1236
1237 MODULE_DESCRIPTION("Realtek RTL8366 SMI interface driver");
1238 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
1239 MODULE_LICENSE("GPL v2");