e60b708d74aeb1491fcaf0b1e5ff349d9cad0ba9
[openwrt/svn-archive/archive.git] / target / linux / generic / files / drivers / net / phy / rtl8366_smi.c
1 /*
2 * Realtek RTL8366 SMI interface driver
3 *
4 * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/gpio.h>
16 #include <linux/spinlock.h>
17 #include <linux/skbuff.h>
18
19 #ifdef CONFIG_RTL8366S_PHY_DEBUG_FS
20 #include <linux/debugfs.h>
21 #endif
22
23 #include "rtl8366_smi.h"
24
25 #define RTL8366_SMI_ACK_RETRY_COUNT 5
26 #define RTL8366_SMI_CLK_DELAY 10 /* nsec */
27
28 static inline void rtl8366_smi_clk_delay(struct rtl8366_smi *smi)
29 {
30 ndelay(RTL8366_SMI_CLK_DELAY);
31 }
32
33 static void rtl8366_smi_start(struct rtl8366_smi *smi)
34 {
35 unsigned int sda = smi->gpio_sda;
36 unsigned int sck = smi->gpio_sck;
37
38 /*
39 * Set GPIO pins to output mode, with initial state:
40 * SCK = 0, SDA = 1
41 */
42 gpio_direction_output(sck, 0);
43 gpio_direction_output(sda, 1);
44 rtl8366_smi_clk_delay(smi);
45
46 /* CLK 1: 0 -> 1, 1 -> 0 */
47 gpio_set_value(sck, 1);
48 rtl8366_smi_clk_delay(smi);
49 gpio_set_value(sck, 0);
50 rtl8366_smi_clk_delay(smi);
51
52 /* CLK 2: */
53 gpio_set_value(sck, 1);
54 rtl8366_smi_clk_delay(smi);
55 gpio_set_value(sda, 0);
56 rtl8366_smi_clk_delay(smi);
57 gpio_set_value(sck, 0);
58 rtl8366_smi_clk_delay(smi);
59 gpio_set_value(sda, 1);
60 }
61
62 static void rtl8366_smi_stop(struct rtl8366_smi *smi)
63 {
64 unsigned int sda = smi->gpio_sda;
65 unsigned int sck = smi->gpio_sck;
66
67 rtl8366_smi_clk_delay(smi);
68 gpio_set_value(sda, 0);
69 gpio_set_value(sck, 1);
70 rtl8366_smi_clk_delay(smi);
71 gpio_set_value(sda, 1);
72 rtl8366_smi_clk_delay(smi);
73 gpio_set_value(sck, 1);
74 rtl8366_smi_clk_delay(smi);
75 gpio_set_value(sck, 0);
76 rtl8366_smi_clk_delay(smi);
77 gpio_set_value(sck, 1);
78
79 /* add a click */
80 rtl8366_smi_clk_delay(smi);
81 gpio_set_value(sck, 0);
82 rtl8366_smi_clk_delay(smi);
83 gpio_set_value(sck, 1);
84
85 /* set GPIO pins to input mode */
86 gpio_direction_input(sda);
87 gpio_direction_input(sck);
88 }
89
90 static void rtl8366_smi_write_bits(struct rtl8366_smi *smi, u32 data, u32 len)
91 {
92 unsigned int sda = smi->gpio_sda;
93 unsigned int sck = smi->gpio_sck;
94
95 for (; len > 0; len--) {
96 rtl8366_smi_clk_delay(smi);
97
98 /* prepare data */
99 gpio_set_value(sda, !!(data & ( 1 << (len - 1))));
100 rtl8366_smi_clk_delay(smi);
101
102 /* clocking */
103 gpio_set_value(sck, 1);
104 rtl8366_smi_clk_delay(smi);
105 gpio_set_value(sck, 0);
106 }
107 }
108
109 static void rtl8366_smi_read_bits(struct rtl8366_smi *smi, u32 len, u32 *data)
110 {
111 unsigned int sda = smi->gpio_sda;
112 unsigned int sck = smi->gpio_sck;
113
114 gpio_direction_input(sda);
115
116 for (*data = 0; len > 0; len--) {
117 u32 u;
118
119 rtl8366_smi_clk_delay(smi);
120
121 /* clocking */
122 gpio_set_value(sck, 1);
123 rtl8366_smi_clk_delay(smi);
124 u = !!gpio_get_value(sda);
125 gpio_set_value(sck, 0);
126
127 *data |= (u << (len - 1));
128 }
129
130 gpio_direction_output(sda, 0);
131 }
132
133 static int rtl8366_smi_wait_for_ack(struct rtl8366_smi *smi)
134 {
135 int retry_cnt;
136
137 retry_cnt = 0;
138 do {
139 u32 ack;
140
141 rtl8366_smi_read_bits(smi, 1, &ack);
142 if (ack == 0)
143 break;
144
145 if (++retry_cnt > RTL8366_SMI_ACK_RETRY_COUNT)
146 return -EIO;
147 } while (1);
148
149 return 0;
150 }
151
152 static int rtl8366_smi_write_byte(struct rtl8366_smi *smi, u8 data)
153 {
154 rtl8366_smi_write_bits(smi, data, 8);
155 return rtl8366_smi_wait_for_ack(smi);
156 }
157
158 static int rtl8366_smi_read_byte0(struct rtl8366_smi *smi, u8 *data)
159 {
160 u32 t;
161
162 /* read data */
163 rtl8366_smi_read_bits(smi, 8, &t);
164 *data = (t & 0xff);
165
166 /* send an ACK */
167 rtl8366_smi_write_bits(smi, 0x00, 1);
168
169 return 0;
170 }
171
172 static int rtl8366_smi_read_byte1(struct rtl8366_smi *smi, u8 *data)
173 {
174 u32 t;
175
176 /* read data */
177 rtl8366_smi_read_bits(smi, 8, &t);
178 *data = (t & 0xff);
179
180 /* send an ACK */
181 rtl8366_smi_write_bits(smi, 0x01, 1);
182
183 return 0;
184 }
185
186 int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
187 {
188 unsigned long flags;
189 u8 lo = 0;
190 u8 hi = 0;
191 int ret;
192
193 spin_lock_irqsave(&smi->lock, flags);
194
195 rtl8366_smi_start(smi);
196
197 /* send READ command */
198 ret = rtl8366_smi_write_byte(smi, 0x0a << 4 | 0x04 << 1 | 0x01);
199 if (ret)
200 goto out;
201
202 /* set ADDR[7:0] */
203 ret = rtl8366_smi_write_byte(smi, addr & 0xff);
204 if (ret)
205 goto out;
206
207 /* set ADDR[15:8] */
208 ret = rtl8366_smi_write_byte(smi, addr >> 8);
209 if (ret)
210 goto out;
211
212 /* read DATA[7:0] */
213 rtl8366_smi_read_byte0(smi, &lo);
214 /* read DATA[15:8] */
215 rtl8366_smi_read_byte1(smi, &hi);
216
217 *data = ((u32) lo) | (((u32) hi) << 8);
218
219 ret = 0;
220
221 out:
222 rtl8366_smi_stop(smi);
223 spin_unlock_irqrestore(&smi->lock, flags);
224
225 return ret;
226 }
227 EXPORT_SYMBOL_GPL(rtl8366_smi_read_reg);
228
229 int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
230 {
231 unsigned long flags;
232 int ret;
233
234 spin_lock_irqsave(&smi->lock, flags);
235
236 rtl8366_smi_start(smi);
237
238 /* send WRITE command */
239 ret = rtl8366_smi_write_byte(smi, 0x0a << 4 | 0x04 << 1 | 0x00);
240 if (ret)
241 goto out;
242
243 /* set ADDR[7:0] */
244 ret = rtl8366_smi_write_byte(smi, addr & 0xff);
245 if (ret)
246 goto out;
247
248 /* set ADDR[15:8] */
249 ret = rtl8366_smi_write_byte(smi, addr >> 8);
250 if (ret)
251 goto out;
252
253 /* write DATA[7:0] */
254 ret = rtl8366_smi_write_byte(smi, data & 0xff);
255 if (ret)
256 goto out;
257
258 /* write DATA[15:8] */
259 ret = rtl8366_smi_write_byte(smi, data >> 8);
260 if (ret)
261 goto out;
262
263 ret = 0;
264
265 out:
266 rtl8366_smi_stop(smi);
267 spin_unlock_irqrestore(&smi->lock, flags);
268
269 return ret;
270 }
271 EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg);
272
273 int rtl8366_smi_rmwr(struct rtl8366_smi *smi, u32 addr, u32 mask, u32 data)
274 {
275 u32 t;
276 int err;
277
278 err = rtl8366_smi_read_reg(smi, addr, &t);
279 if (err)
280 return err;
281
282 err = rtl8366_smi_write_reg(smi, addr, (t & ~mask) | data);
283 return err;
284
285 }
286 EXPORT_SYMBOL_GPL(rtl8366_smi_rmwr);
287
288 static int rtl8366_mc_is_used(struct rtl8366_smi *smi, int mc_index, int *used)
289 {
290 int err;
291 int i;
292
293 *used = 0;
294 for (i = 0; i < smi->num_ports; i++) {
295 int index = 0;
296
297 err = smi->ops->get_mc_index(smi, i, &index);
298 if (err)
299 return err;
300
301 if (mc_index == index) {
302 *used = 1;
303 break;
304 }
305 }
306
307 return 0;
308 }
309
310 static int rtl8366_set_vlan(struct rtl8366_smi *smi, int vid, u32 member,
311 u32 untag, u32 fid)
312 {
313 struct rtl8366_vlan_4k vlan4k;
314 int err;
315 int i;
316
317 /* Update the 4K table */
318 err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
319 if (err)
320 return err;
321
322 vlan4k.member = member;
323 vlan4k.untag = untag;
324 vlan4k.fid = fid;
325 err = smi->ops->set_vlan_4k(smi, &vlan4k);
326 if (err)
327 return err;
328
329 /* Try to find an existing MC entry for this VID */
330 for (i = 0; i < smi->num_vlan_mc; i++) {
331 struct rtl8366_vlan_mc vlanmc;
332
333 err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
334 if (err)
335 return err;
336
337 if (vid == vlanmc.vid) {
338 /* update the MC entry */
339 vlanmc.member = member;
340 vlanmc.untag = untag;
341 vlanmc.fid = fid;
342
343 err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
344 break;
345 }
346 }
347
348 return err;
349 }
350
351 static int rtl8366_get_pvid(struct rtl8366_smi *smi, int port, int *val)
352 {
353 struct rtl8366_vlan_mc vlanmc;
354 int err;
355 int index;
356
357 err = smi->ops->get_mc_index(smi, port, &index);
358 if (err)
359 return err;
360
361 err = smi->ops->get_vlan_mc(smi, index, &vlanmc);
362 if (err)
363 return err;
364
365 *val = vlanmc.vid;
366 return 0;
367 }
368
369 static int rtl8366_set_pvid(struct rtl8366_smi *smi, unsigned port,
370 unsigned vid)
371 {
372 struct rtl8366_vlan_mc vlanmc;
373 struct rtl8366_vlan_4k vlan4k;
374 int err;
375 int i;
376
377 /* Try to find an existing MC entry for this VID */
378 for (i = 0; i < smi->num_vlan_mc; i++) {
379 err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
380 if (err)
381 return err;
382
383 if (vid == vlanmc.vid) {
384 err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
385 if (err)
386 return err;
387
388 err = smi->ops->set_mc_index(smi, port, i);
389 return err;
390 }
391 }
392
393 /* We have no MC entry for this VID, try to find an empty one */
394 for (i = 0; i < smi->num_vlan_mc; i++) {
395 err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
396 if (err)
397 return err;
398
399 if (vlanmc.vid == 0 && vlanmc.member == 0) {
400 /* Update the entry from the 4K table */
401 err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
402 if (err)
403 return err;
404
405 vlanmc.vid = vid;
406 vlanmc.member = vlan4k.member;
407 vlanmc.untag = vlan4k.untag;
408 vlanmc.fid = vlan4k.fid;
409 err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
410 if (err)
411 return err;
412
413 err = smi->ops->set_mc_index(smi, port, i);
414 return err;
415 }
416 }
417
418 /* MC table is full, try to find an unused entry and replace it */
419 for (i = 0; i < smi->num_vlan_mc; i++) {
420 int used;
421
422 err = rtl8366_mc_is_used(smi, i, &used);
423 if (err)
424 return err;
425
426 if (!used) {
427 /* Update the entry from the 4K table */
428 err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
429 if (err)
430 return err;
431
432 vlanmc.vid = vid;
433 vlanmc.member = vlan4k.member;
434 vlanmc.untag = vlan4k.untag;
435 vlanmc.fid = vlan4k.fid;
436 err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
437 if (err)
438 return err;
439
440 err = smi->ops->set_mc_index(smi, port, i);
441 return err;
442 }
443 }
444
445 dev_err(smi->parent,
446 "all VLAN member configurations are in use\n");
447
448 return -ENOSPC;
449 }
450
451 static int rtl8366_enable_vlan(struct rtl8366_smi *smi, int enable)
452 {
453 int err;
454
455 err = smi->ops->enable_vlan(smi, enable);
456 if (err)
457 return err;
458
459 smi->vlan_enabled = enable;
460
461 if (!enable) {
462 smi->vlan4k_enabled = 0;
463 err = smi->ops->enable_vlan4k(smi, enable);
464 }
465
466 return err;
467 }
468
469 static int rtl8366_enable_vlan4k(struct rtl8366_smi *smi, int enable)
470 {
471 int err;
472
473 if (enable) {
474 err = smi->ops->enable_vlan(smi, enable);
475 if (err)
476 return err;
477
478 smi->vlan_enabled = enable;
479 }
480
481 err = smi->ops->enable_vlan4k(smi, enable);
482 if (err)
483 return err;
484
485 smi->vlan4k_enabled = enable;
486 return 0;
487 }
488
489 int rtl8366_reset_vlan(struct rtl8366_smi *smi)
490 {
491 struct rtl8366_vlan_mc vlanmc;
492 int err;
493 int i;
494
495 rtl8366_enable_vlan(smi, 0);
496 rtl8366_enable_vlan4k(smi, 0);
497
498 /* clear VLAN member configurations */
499 vlanmc.vid = 0;
500 vlanmc.priority = 0;
501 vlanmc.member = 0;
502 vlanmc.untag = 0;
503 vlanmc.fid = 0;
504 for (i = 0; i < smi->num_vlan_mc; i++) {
505 err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
506 if (err)
507 return err;
508 }
509
510 for (i = 0; i < smi->num_ports; i++) {
511 if (i == smi->cpu_port)
512 continue;
513
514 err = rtl8366_set_vlan(smi, (i + 1),
515 (1 << i) | (1 << smi->cpu_port),
516 (1 << i) | (1 << smi->cpu_port),
517 0);
518 if (err)
519 return err;
520
521 err = rtl8366_set_pvid(smi, i, (i + 1));
522 if (err)
523 return err;
524 }
525
526 return 0;
527 }
528 EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);
529
530 #ifdef CONFIG_RTL8366S_PHY_DEBUG_FS
531 int rtl8366_debugfs_open(struct inode *inode, struct file *file)
532 {
533 file->private_data = inode->i_private;
534 return 0;
535 }
536 EXPORT_SYMBOL_GPL(rtl8366_debugfs_open);
537
538 static ssize_t rtl8366_read_debugfs_vlan_mc(struct file *file,
539 char __user *user_buf,
540 size_t count, loff_t *ppos)
541 {
542 struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
543 int i, len = 0;
544 char *buf = smi->buf;
545
546 len += snprintf(buf + len, sizeof(smi->buf) - len,
547 "%2s %6s %4s %6s %6s %3s\n",
548 "id", "vid","prio", "member", "untag", "fid");
549
550 for (i = 0; i < smi->num_vlan_mc; ++i) {
551 struct rtl8366_vlan_mc vlanmc;
552
553 smi->ops->get_vlan_mc(smi, i, &vlanmc);
554
555 len += snprintf(buf + len, sizeof(smi->buf) - len,
556 "%2d %6d %4d 0x%04x 0x%04x %3d\n",
557 i, vlanmc.vid, vlanmc.priority,
558 vlanmc.member, vlanmc.untag, vlanmc.fid);
559 }
560
561 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
562 }
563
564 static ssize_t rtl8366_read_debugfs_pvid(struct file *file,
565 char __user *user_buf,
566 size_t count, loff_t *ppos)
567 {
568 struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
569 char *buf = smi->buf;
570 int len = 0;
571 int i;
572
573 len += snprintf(buf + len, sizeof(smi->buf) - len, "%4s %4s\n",
574 "port", "pvid");
575
576 for (i = 0; i < smi->num_ports; i++) {
577 int pvid;
578 int err;
579
580 err = rtl8366_get_pvid(smi, i, &pvid);
581 if (err)
582 len += snprintf(buf + len, sizeof(smi->buf) - len,
583 "%4d error\n", i);
584 else
585 len += snprintf(buf + len, sizeof(smi->buf) - len,
586 "%4d %4d\n", i, pvid);
587 }
588
589 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
590 }
591
592 static ssize_t rtl8366_read_debugfs_reg(struct file *file,
593 char __user *user_buf,
594 size_t count, loff_t *ppos)
595 {
596 struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
597 u32 t, reg = smi->dbg_reg;
598 int err, len = 0;
599 char *buf = smi->buf;
600
601 memset(buf, '\0', sizeof(smi->buf));
602
603 err = rtl8366_smi_read_reg(smi, reg, &t);
604 if (err) {
605 len += snprintf(buf, sizeof(smi->buf),
606 "Read failed (reg: 0x%04x)\n", reg);
607 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
608 }
609
610 len += snprintf(buf, sizeof(smi->buf), "reg = 0x%04x, val = 0x%04x\n",
611 reg, t);
612
613 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
614 }
615
616 static ssize_t rtl8366_write_debugfs_reg(struct file *file,
617 const char __user *user_buf,
618 size_t count, loff_t *ppos)
619 {
620 struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
621 unsigned long data;
622 u32 reg = smi->dbg_reg;
623 int err;
624 size_t len;
625 char *buf = smi->buf;
626
627 len = min(count, sizeof(smi->buf) - 1);
628 if (copy_from_user(buf, user_buf, len)) {
629 dev_err(smi->parent, "copy from user failed\n");
630 return -EFAULT;
631 }
632
633 buf[len] = '\0';
634 if (len > 0 && buf[len - 1] == '\n')
635 buf[len - 1] = '\0';
636
637
638 if (strict_strtoul(buf, 16, &data)) {
639 dev_err(smi->parent, "Invalid reg value %s\n", buf);
640 } else {
641 err = rtl8366_smi_write_reg(smi, reg, data);
642 if (err) {
643 dev_err(smi->parent,
644 "writing reg 0x%04x val 0x%04lx failed\n",
645 reg, data);
646 }
647 }
648
649 return count;
650 }
651
652 static ssize_t rtl8366_read_debugfs_mibs(struct file *file,
653 char __user *user_buf,
654 size_t count, loff_t *ppos)
655 {
656 struct rtl8366_smi *smi = file->private_data;
657 int i, j, len = 0;
658 char *buf = smi->buf;
659
660 len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s",
661 "Counter");
662
663 for (i = 0; i < smi->num_ports; i++) {
664 char port_buf[10];
665
666 snprintf(port_buf, sizeof(port_buf), "Port %d", i);
667 len += snprintf(buf + len, sizeof(smi->buf) - len, " %12s",
668 port_buf);
669 }
670 len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
671
672 for (i = 0; i < smi->num_mib_counters; i++) {
673 len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s ",
674 smi->mib_counters[i].name);
675 for (j = 0; j < smi->num_ports; j++) {
676 unsigned long long counter = 0;
677
678 if (!smi->ops->get_mib_counter(smi, i, j, &counter))
679 len += snprintf(buf + len,
680 sizeof(smi->buf) - len,
681 "%12llu ", counter);
682 else
683 len += snprintf(buf + len,
684 sizeof(smi->buf) - len,
685 "%12s ", "error");
686 }
687 len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
688 }
689
690 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
691 }
692
693 static const struct file_operations fops_rtl8366_regs = {
694 .read = rtl8366_read_debugfs_reg,
695 .write = rtl8366_write_debugfs_reg,
696 .open = rtl8366_debugfs_open,
697 .owner = THIS_MODULE
698 };
699
700 static const struct file_operations fops_rtl8366_vlan_mc = {
701 .read = rtl8366_read_debugfs_vlan_mc,
702 .open = rtl8366_debugfs_open,
703 .owner = THIS_MODULE
704 };
705
706 static const struct file_operations fops_rtl8366_pvid = {
707 .read = rtl8366_read_debugfs_pvid,
708 .open = rtl8366_debugfs_open,
709 .owner = THIS_MODULE
710 };
711
712 static const struct file_operations fops_rtl8366_mibs = {
713 .read = rtl8366_read_debugfs_mibs,
714 .open = rtl8366_debugfs_open,
715 .owner = THIS_MODULE
716 };
717
718 static void rtl8366_debugfs_init(struct rtl8366_smi *smi)
719 {
720 struct dentry *node;
721 struct dentry *root;
722
723 if (!smi->debugfs_root)
724 smi->debugfs_root = debugfs_create_dir(dev_name(smi->parent),
725 NULL);
726
727 if (!smi->debugfs_root) {
728 dev_err(smi->parent, "Unable to create debugfs dir\n");
729 return;
730 }
731 root = smi->debugfs_root;
732
733 node = debugfs_create_x16("reg", S_IRUGO | S_IWUSR, root,
734 &smi->dbg_reg);
735 if (!node) {
736 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
737 "reg");
738 return;
739 }
740
741 node = debugfs_create_file("val", S_IRUGO | S_IWUSR, root, smi,
742 &fops_rtl8366_regs);
743 if (!node) {
744 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
745 "val");
746 return;
747 }
748
749 node = debugfs_create_file("vlan_mc", S_IRUSR, root, smi,
750 &fops_rtl8366_vlan_mc);
751 if (!node) {
752 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
753 "vlan_mc");
754 return;
755 }
756
757 node = debugfs_create_file("pvid", S_IRUSR, root, smi,
758 &fops_rtl8366_pvid);
759 if (!node) {
760 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
761 "pvid");
762 return;
763 }
764
765 node = debugfs_create_file("mibs", S_IRUSR, smi->debugfs_root, smi,
766 &fops_rtl8366_mibs);
767 if (!node)
768 dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
769 "mibs");
770 }
771
772 static void rtl8366_debugfs_remove(struct rtl8366_smi *smi)
773 {
774 if (smi->debugfs_root) {
775 debugfs_remove_recursive(smi->debugfs_root);
776 smi->debugfs_root = NULL;
777 }
778 }
779 #else
780 static inline void rtl8366_debugfs_init(struct rtl8366_smi *smi) {}
781 static inline void rtl8366_debugfs_remove(struct rtl8366_smi *smi) {}
782 #endif /* CONFIG_RTL8366S_PHY_DEBUG_FS */
783
784 static int rtl8366_smi_mii_init(struct rtl8366_smi *smi)
785 {
786 int ret;
787 int i;
788
789 smi->mii_bus = mdiobus_alloc();
790 if (smi->mii_bus == NULL) {
791 ret = -ENOMEM;
792 goto err;
793 }
794
795 smi->mii_bus->priv = (void *) smi;
796 smi->mii_bus->name = dev_name(smi->parent);
797 smi->mii_bus->read = smi->ops->mii_read;
798 smi->mii_bus->write = smi->ops->mii_write;
799 snprintf(smi->mii_bus->id, MII_BUS_ID_SIZE, "%s",
800 dev_name(smi->parent));
801 smi->mii_bus->parent = smi->parent;
802 smi->mii_bus->phy_mask = ~(0x1f);
803 smi->mii_bus->irq = smi->mii_irq;
804 for (i = 0; i < PHY_MAX_ADDR; i++)
805 smi->mii_irq[i] = PHY_POLL;
806
807 ret = mdiobus_register(smi->mii_bus);
808 if (ret)
809 goto err_free;
810
811 return 0;
812
813 err_free:
814 mdiobus_free(smi->mii_bus);
815 err:
816 return ret;
817 }
818
819 static void rtl8366_smi_mii_cleanup(struct rtl8366_smi *smi)
820 {
821 mdiobus_unregister(smi->mii_bus);
822 mdiobus_free(smi->mii_bus);
823 }
824
825 int rtl8366_sw_get_port_pvid(struct switch_dev *dev, int port, int *val)
826 {
827 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
828 return rtl8366_get_pvid(smi, port, val);
829 }
830 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_pvid);
831
832 int rtl8366_sw_set_port_pvid(struct switch_dev *dev, int port, int val)
833 {
834 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
835 return rtl8366_set_pvid(smi, port, val);
836 }
837 EXPORT_SYMBOL_GPL(rtl8366_sw_set_port_pvid);
838
839 int rtl8366_sw_get_port_mib(struct switch_dev *dev,
840 const struct switch_attr *attr,
841 struct switch_val *val)
842 {
843 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
844 int i, len = 0;
845 unsigned long long counter = 0;
846 char *buf = smi->buf;
847
848 if (val->port_vlan >= smi->num_ports)
849 return -EINVAL;
850
851 len += snprintf(buf + len, sizeof(smi->buf) - len,
852 "Port %d MIB counters\n",
853 val->port_vlan);
854
855 for (i = 0; i < smi->num_mib_counters; ++i) {
856 len += snprintf(buf + len, sizeof(smi->buf) - len,
857 "%-36s: ", smi->mib_counters[i].name);
858 if (!smi->ops->get_mib_counter(smi, i, val->port_vlan,
859 &counter))
860 len += snprintf(buf + len, sizeof(smi->buf) - len,
861 "%llu\n", counter);
862 else
863 len += snprintf(buf + len, sizeof(smi->buf) - len,
864 "%s\n", "error");
865 }
866
867 val->value.s = buf;
868 val->len = len;
869 return 0;
870 }
871 EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_mib);
872
873 int rtl8366_sw_get_vlan_info(struct switch_dev *dev,
874 const struct switch_attr *attr,
875 struct switch_val *val)
876 {
877 int i;
878 u32 len = 0;
879 struct rtl8366_vlan_4k vlan4k;
880 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
881 char *buf = smi->buf;
882 int err;
883
884 if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
885 return -EINVAL;
886
887 memset(buf, '\0', sizeof(smi->buf));
888
889 err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
890 if (err)
891 return err;
892
893 len += snprintf(buf + len, sizeof(smi->buf) - len,
894 "VLAN %d: Ports: '", vlan4k.vid);
895
896 for (i = 0; i < smi->num_ports; i++) {
897 if (!(vlan4k.member & (1 << i)))
898 continue;
899
900 len += snprintf(buf + len, sizeof(smi->buf) - len, "%d%s", i,
901 (vlan4k.untag & (1 << i)) ? "" : "t");
902 }
903
904 len += snprintf(buf + len, sizeof(smi->buf) - len,
905 "', members=%04x, untag=%04x, fid=%u",
906 vlan4k.member, vlan4k.untag, vlan4k.fid);
907
908 val->value.s = buf;
909 val->len = len;
910
911 return 0;
912 }
913 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_info);
914
915 int rtl8366_sw_get_vlan_ports(struct switch_dev *dev, struct switch_val *val)
916 {
917 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
918 struct switch_port *port;
919 struct rtl8366_vlan_4k vlan4k;
920 int i;
921
922 if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
923 return -EINVAL;
924
925 smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
926
927 port = &val->value.ports[0];
928 val->len = 0;
929 for (i = 0; i < smi->num_ports; i++) {
930 if (!(vlan4k.member & BIT(i)))
931 continue;
932
933 port->id = i;
934 port->flags = (vlan4k.untag & BIT(i)) ?
935 0 : BIT(SWITCH_PORT_FLAG_TAGGED);
936 val->len++;
937 port++;
938 }
939 return 0;
940 }
941 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_ports);
942
943 int rtl8366_sw_set_vlan_ports(struct switch_dev *dev, struct switch_val *val)
944 {
945 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
946 struct switch_port *port;
947 u32 member = 0;
948 u32 untag = 0;
949 int err;
950 int i;
951
952 if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
953 return -EINVAL;
954
955 port = &val->value.ports[0];
956 for (i = 0; i < val->len; i++, port++) {
957 member |= BIT(port->id);
958
959 if (!(port->flags & BIT(SWITCH_PORT_FLAG_TAGGED)))
960 untag |= BIT(port->id);
961
962 /*
963 * To ensure that we have a valid MC entry for this VLAN,
964 * initialize the port VLAN ID here.
965 */
966 err = rtl8366_set_pvid(smi, port->id, val->port_vlan);
967 if (err < 0)
968 return err;
969 }
970
971 return rtl8366_set_vlan(smi, val->port_vlan, member, untag, 0);
972 }
973 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_ports);
974
975 int rtl8366_sw_get_vlan_fid(struct switch_dev *dev,
976 const struct switch_attr *attr,
977 struct switch_val *val)
978 {
979 struct rtl8366_vlan_4k vlan4k;
980 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
981 int err;
982
983 if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
984 return -EINVAL;
985
986 err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
987 if (err)
988 return err;
989
990 val->value.i = vlan4k.fid;
991
992 return 0;
993 }
994 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_fid);
995
996 int rtl8366_sw_set_vlan_fid(struct switch_dev *dev,
997 const struct switch_attr *attr,
998 struct switch_val *val)
999 {
1000 struct rtl8366_vlan_4k vlan4k;
1001 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1002 int err;
1003
1004 if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
1005 return -EINVAL;
1006
1007 if (val->value.i < 0 || val->value.i > attr->max)
1008 return -EINVAL;
1009
1010 err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
1011 if (err)
1012 return err;
1013
1014 return rtl8366_set_vlan(smi, val->port_vlan,
1015 vlan4k.member,
1016 vlan4k.untag,
1017 val->value.i);
1018 }
1019 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_fid);
1020
1021 int rtl8366_sw_get_vlan_enable(struct switch_dev *dev,
1022 const struct switch_attr *attr,
1023 struct switch_val *val)
1024 {
1025 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1026
1027 if (attr->ofs > 2)
1028 return -EINVAL;
1029
1030 if (attr->ofs == 1)
1031 val->value.i = smi->vlan_enabled;
1032 else
1033 val->value.i = smi->vlan4k_enabled;
1034
1035 return 0;
1036 }
1037 EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_enable);
1038
1039 int rtl8366_sw_set_vlan_enable(struct switch_dev *dev,
1040 const struct switch_attr *attr,
1041 struct switch_val *val)
1042 {
1043 struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
1044 int err;
1045
1046 if (attr->ofs > 2)
1047 return -EINVAL;
1048
1049 if (attr->ofs == 1)
1050 err = rtl8366_enable_vlan(smi, val->value.i);
1051 else
1052 err = rtl8366_enable_vlan4k(smi, val->value.i);
1053
1054 return err;
1055 }
1056 EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_enable);
1057
1058 struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent)
1059 {
1060 struct rtl8366_smi *smi;
1061
1062 BUG_ON(!parent);
1063
1064 smi = kzalloc(sizeof(*smi), GFP_KERNEL);
1065 if (!smi) {
1066 dev_err(parent, "no memory for private data\n");
1067 return NULL;
1068 }
1069
1070 smi->parent = parent;
1071 return smi;
1072 }
1073 EXPORT_SYMBOL_GPL(rtl8366_smi_alloc);
1074
1075 int rtl8366_smi_init(struct rtl8366_smi *smi)
1076 {
1077 int err;
1078
1079 if (!smi->ops)
1080 return -EINVAL;
1081
1082 err = gpio_request(smi->gpio_sda, dev_name(smi->parent));
1083 if (err) {
1084 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1085 smi->gpio_sda, err);
1086 goto err_out;
1087 }
1088
1089 err = gpio_request(smi->gpio_sck, dev_name(smi->parent));
1090 if (err) {
1091 dev_err(smi->parent, "gpio_request failed for %u, err=%d\n",
1092 smi->gpio_sck, err);
1093 goto err_free_sda;
1094 }
1095
1096 spin_lock_init(&smi->lock);
1097
1098 dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
1099 smi->gpio_sda, smi->gpio_sck);
1100
1101 err = smi->ops->detect(smi);
1102 if (err) {
1103 dev_err(smi->parent, "chip detection failed, err=%d\n", err);
1104 goto err_free_sck;
1105 }
1106
1107 err = smi->ops->setup(smi);
1108 if (err) {
1109 dev_err(smi->parent, "chip setup failed, err=%d\n", err);
1110 goto err_free_sck;
1111 }
1112
1113 err = rtl8366_smi_mii_init(smi);
1114 if (err)
1115 goto err_free_sck;
1116
1117 rtl8366_debugfs_init(smi);
1118
1119 return 0;
1120
1121 err_free_sck:
1122 gpio_free(smi->gpio_sck);
1123 err_free_sda:
1124 gpio_free(smi->gpio_sda);
1125 err_out:
1126 return err;
1127 }
1128 EXPORT_SYMBOL_GPL(rtl8366_smi_init);
1129
1130 void rtl8366_smi_cleanup(struct rtl8366_smi *smi)
1131 {
1132 rtl8366_debugfs_remove(smi);
1133 rtl8366_smi_mii_cleanup(smi);
1134 gpio_free(smi->gpio_sck);
1135 gpio_free(smi->gpio_sda);
1136 }
1137 EXPORT_SYMBOL_GPL(rtl8366_smi_cleanup);
1138
1139 MODULE_DESCRIPTION("Realtek RTL8366 SMI interface driver");
1140 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
1141 MODULE_LICENSE("GPL v2");