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Add a driver for Atheros AR8216 switches
[openwrt.git] / target / linux / generic-2.6 / files / drivers / net / phy / ip175c.c
1 /*
2 * swconfig-ip175c.c: Swconfig configuration for IC+ IP175C switch
3 *
4 * Copyright (C) 2008 Patrick Horn <patrick.horn@gmail.com>
5 * Copyright (C) 2008 Martin Mares <mj@ucw.cz>
6 * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/list.h>
23 #include <linux/skbuff.h>
24 #include <linux/mii.h>
25 #include <linux/phy.h>
26 #include <linux/delay.h>
27 #include <linux/switch.h>
28
29 #define MAX_VLANS 16
30 #define MAX_PORTS 9
31
32 typedef struct ip175c_reg {
33 u16 p; // phy
34 u16 m; // mii
35 } reg;
36 typedef char bitnum;
37
38 #define NOTSUPPORTED {-1,-1}
39
40 #define REG_SUPP(x) (((x).m != ((u16)-1)) && ((x).p != (u16)-1))
41
42 /*********** CONSTANTS ***********/
43 struct register_mappings {
44 char *NAME;
45 u16 MODEL_NO; // compare to bits 4-9 of MII register 0,3.
46 bitnum NUM_PORTS;
47 bitnum CPU_PORT;
48
49 /* The default VLAN for each port.
50 Default: 0x0001 for Ports 0,1,2,3
51 0x0002 for Ports 4,5 */
52 reg VLAN_DEFAULT_TAG_REG[MAX_PORTS];
53
54 /* These ports are tagged.
55 Default: 0x00 */
56 reg ADD_TAG_REG;
57 reg REMOVE_TAG_REG;
58 bitnum ADD_TAG_BIT[MAX_PORTS];
59 /* These ports are untagged.
60 Default: 0x00 (i.e. do not alter any VLAN tags...)
61 Maybe set to 0 if user disables VLANs. */
62 bitnum REMOVE_TAG_BIT[MAX_PORTS];
63
64 /* Port M and Port N are on the same VLAN.
65 Default: All ports on all VLANs. */
66 // Use register {29, 19+N/2}
67 reg VLAN_LOOKUP_REG;
68 // Port 5 uses register {30, 18} but same as odd bits.
69 reg VLAN_LOOKUP_REG_5; // in a different register on IP175C.
70 bitnum VLAN_LOOKUP_EVEN_BIT[MAX_PORTS];
71 bitnum VLAN_LOOKUP_ODD_BIT[MAX_PORTS];
72
73 /* This VLAN corresponds to which ports.
74 Default: 0x2f,0x30,0x3f,0x3f... */
75 reg TAG_VLAN_MASK_REG;
76 bitnum TAG_VLAN_MASK_EVEN_BIT[MAX_PORTS];
77 bitnum TAG_VLAN_MASK_ODD_BIT[MAX_PORTS];
78
79 int RESET_VAL;
80 reg RESET_REG;
81
82 reg MODE_REG;
83 int MODE_VAL;
84
85 /* General flags */
86 reg ROUTER_CONTROL_REG;
87 reg VLAN_CONTROL_REG;
88 bitnum TAG_VLAN_BIT;
89 bitnum ROUTER_EN_BIT;
90 bitnum NUMLAN_GROUPS_MAX;
91 bitnum NUMLAN_GROUPS_BIT;
92
93 reg MII_REGISTER_EN;
94 bitnum MII_REGISTER_EN_BIT;
95
96 // set to 1 for 178C, 0 for 175C.
97 bitnum SIMPLE_VLAN_REGISTERS; // 175C has two vlans per register but 178C has only one.
98 };
99
100 static const struct register_mappings IP178C = {
101 .NAME = "IP178C",
102 .MODEL_NO = 0x18,
103 .VLAN_DEFAULT_TAG_REG = {
104 {30,3},{30,4},{30,5},{30,6},{30,7},{30,8},
105 {30,9},{30,10},{30,11},
106 },
107
108 .ADD_TAG_REG = {30,12},
109 .ADD_TAG_BIT = {0,1,2,3,4,5,6,7,8},
110 .REMOVE_TAG_REG = {30,13},
111 .REMOVE_TAG_BIT = {4,5,6,7,8,9,10,11,12},
112
113 .SIMPLE_VLAN_REGISTERS = 1,
114
115 .VLAN_LOOKUP_REG = {31,0},// +N
116 .VLAN_LOOKUP_REG_5 = NOTSUPPORTED, // not used with SIMPLE_VLAN_REGISTERS
117 .VLAN_LOOKUP_EVEN_BIT = {0,1,2,3,4,5,6,7,8},
118 .VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,5,6,7,8},
119
120 .TAG_VLAN_MASK_REG = {30,14}, // +N
121 .TAG_VLAN_MASK_EVEN_BIT = {0,1,2,3,4,5,6,7,8},
122 .TAG_VLAN_MASK_ODD_BIT = {0,1,2,3,4,5,6,7,8},
123
124 .RESET_VAL = 0x55AA,
125 .RESET_REG = {30,0},
126 .MODE_VAL = 0,
127 .MODE_REG = NOTSUPPORTED,
128
129 .ROUTER_CONTROL_REG = {30,30},
130 .ROUTER_EN_BIT = 11,
131 .NUMLAN_GROUPS_MAX = 8,
132 .NUMLAN_GROUPS_BIT = 8, // {0-2}
133
134 .VLAN_CONTROL_REG = {30,13},
135 .TAG_VLAN_BIT = 3,
136
137 .CPU_PORT = 8,
138 .NUM_PORTS = 9,
139
140 .MII_REGISTER_EN = NOTSUPPORTED,
141
142 };
143
144 static const struct register_mappings IP175C = {
145 .NAME = "IP175C",
146 .MODEL_NO = 0x18,
147 .VLAN_DEFAULT_TAG_REG = {
148 {29,24},{29,25},{29,26},{29,27},{29,28},{29,30},
149 NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED
150 },
151
152 .ADD_TAG_REG = {29,23},
153 .REMOVE_TAG_REG = {29,23},
154 .ADD_TAG_BIT = {11,12,13,14,15,1,-1,-1,-1},
155 .REMOVE_TAG_BIT = {6,7,8,9,10,0,-1,-1,-1},
156
157 .SIMPLE_VLAN_REGISTERS = 0,
158
159 .VLAN_LOOKUP_REG = {29,19},// +N/2
160 .VLAN_LOOKUP_REG_5 = {30,18},
161 .VLAN_LOOKUP_EVEN_BIT = {8,9,10,11,12,15,-1,-1,-1},
162 .VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,7,-1,-1,-1},
163
164 .TAG_VLAN_MASK_REG = {30,1}, // +N/2
165 .TAG_VLAN_MASK_EVEN_BIT = {0,1,2,3,4,5,-1,-1,-1},
166 .TAG_VLAN_MASK_ODD_BIT = {8,9,10,11,12,13,-1,-1,-1},
167
168 .RESET_VAL = 0x175C,
169 .RESET_REG = {30,0},
170 .MODE_VAL = 0x175C,
171 .MODE_REG = {29,31},
172
173 .ROUTER_CONTROL_REG = {30,9},
174 .ROUTER_EN_BIT = 3,
175 .NUMLAN_GROUPS_MAX = 8,
176 .NUMLAN_GROUPS_BIT = 0, // {0-2}
177
178 .VLAN_CONTROL_REG = {30,9},
179 .TAG_VLAN_BIT = 7,
180
181 .NUM_PORTS = 6,
182 .CPU_PORT = 5,
183
184 .MII_REGISTER_EN = NOTSUPPORTED,
185
186 };
187
188 static const struct register_mappings IP175A = {
189 .NAME = "IP175A",
190 .MODEL_NO = 0x05,
191 .VLAN_DEFAULT_TAG_REG = {
192 {0,24},{0,25},{0,26},{0,27},{0,28},NOTSUPPORTED,
193 NOTSUPPORTED,NOTSUPPORTED,NOTSUPPORTED
194 },
195
196 .ADD_TAG_REG = {0,23},
197 .REMOVE_TAG_REG = {0,23},
198 .ADD_TAG_BIT = {11,12,13,14,15,1,-1,-1,-1},
199 .REMOVE_TAG_BIT = {6,7,8,9,10,0,-1,-1,-1},
200
201 .SIMPLE_VLAN_REGISTERS = 1,
202
203 // Only programmable via. EEPROM
204 .VLAN_LOOKUP_REG = NOTSUPPORTED,// +N/2
205 .VLAN_LOOKUP_REG_5 = NOTSUPPORTED,
206 .VLAN_LOOKUP_EVEN_BIT = {8,9,10,11,12,15,-1,-1,-1},
207 .VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,7,-1,-1,-1},
208
209 .TAG_VLAN_MASK_REG = NOTSUPPORTED, // +N/2
210 .TAG_VLAN_MASK_EVEN_BIT = {0,1,2,3,4,5,-1,-1,-1},
211 .TAG_VLAN_MASK_ODD_BIT = {8,9,10,11,12,13,-1,-1,-1},
212
213 .RESET_VAL = -1,
214 .RESET_REG = NOTSUPPORTED,
215 .MODE_VAL = 0,
216 .MODE_REG = NOTSUPPORTED,
217
218 .ROUTER_CONTROL_REG = NOTSUPPORTED,
219 .VLAN_CONTROL_REG = NOTSUPPORTED,
220 .TAG_VLAN_BIT = -1,
221 .ROUTER_EN_BIT = -1,
222 .NUMLAN_GROUPS_MAX = -1,
223 .NUMLAN_GROUPS_BIT = -1, // {0-2}
224
225 .NUM_PORTS = 6,
226 .CPU_PORT = 5,
227
228 .MII_REGISTER_EN = {0, 12},
229 .MII_REGISTER_EN_BIT = 7,
230 };
231
232 struct ip175c_state {
233 struct switch_dev dev;
234 struct mii_bus *mii_bus;
235 bool registered;
236
237 int router_mode; // ROUTER_EN
238 int vlan_enabled; // TAG_VLAN_EN
239 struct port_state {
240 u16 pvid;
241 unsigned int shareports;
242 } ports[MAX_PORTS];
243 unsigned int add_tag;
244 unsigned int remove_tag;
245 int num_vlans;
246 unsigned int vlan_ports[MAX_VLANS];
247 const struct register_mappings *regs;
248 reg proc_mii; /*!< phy/reg for the low level register access via /proc */
249
250 char buf[80];
251 };
252
253 static int ip_phy_read(struct mii_bus *bus, int port, int reg)
254 {
255 int val;
256
257 mutex_lock(&bus->mdio_lock);
258 val = bus->read(bus, port, reg);
259 mutex_unlock(&bus->mdio_lock);
260
261 return val;
262 }
263
264
265 static int ip_phy_write(struct mii_bus *bus, int port, int reg, u16 val)
266 {
267 int err;
268
269 mutex_lock(&bus->mdio_lock);
270 err = bus->write(bus, port, reg, val);
271 mutex_unlock(&bus->mdio_lock);
272
273 return err;
274 }
275
276
277 static int getPhy (struct ip175c_state *state, reg mii)
278 {
279 struct mii_bus *bus = state->mii_bus;
280 int val;
281
282 if (!REG_SUPP(mii))
283 return -EFAULT;
284
285 val = ip_phy_read(bus, mii.p, mii.m);
286 if (val < 0)
287 pr_warning("IP175C: Unable to get MII register %d,%d: error %d\n", mii.p,mii.m,-val);
288
289 return val;
290 }
291
292 static int setPhy (struct ip175c_state *state, reg mii, u16 value)
293 {
294 struct mii_bus *bus = state->mii_bus;
295 int err;
296
297 if (!REG_SUPP(mii))
298 return -EFAULT;
299
300 err = ip_phy_write(bus, mii.p, mii.m, value);
301 if (err < 0) {
302 pr_warning("IP175C: Unable to set MII register %d,%d to %d: error %d\n", mii.p,mii.m,value,-err);
303 return err;
304 }
305 mdelay(2);
306 getPhy(state, mii);
307 return 0;
308 }
309
310 /**
311 * These two macros are to simplify the mapping of logical bits to the bits in hardware.
312 * NOTE: these macros will return if there is an error!
313 */
314
315 #define GET_PORT_BITS(state, bits, addr, bit_lookup) \
316 do { \
317 int i, val = getPhy((state), (addr)); \
318 if (val < 0) \
319 return val; \
320 (bits) = 0; \
321 for (i = 0; i < MAX_PORTS; i++) { \
322 if ((bit_lookup)[i] == -1) continue; \
323 if (val & (1<<(bit_lookup)[i])) \
324 (bits) |= (1<<i); \
325 } \
326 } while (0)
327
328 #define SET_PORT_BITS(state, bits, addr, bit_lookup) \
329 do { \
330 int i, val = getPhy((state), (addr)); \
331 if (val < 0) \
332 return val; \
333 for (i = 0; i < MAX_PORTS; i++) { \
334 unsigned int newmask = ((bits)&(1<<i)); \
335 if ((bit_lookup)[i] == -1) continue; \
336 val &= ~(1<<(bit_lookup)[i]); \
337 val |= ((newmask>>i)<<(bit_lookup)[i]); \
338 } \
339 val = setPhy((state), (addr), val); \
340 if (val < 0) \
341 return val; \
342 } while (0)
343
344 static int get_model(struct ip175c_state *state)
345 {
346 reg oui_id_reg = {0, 2};
347 int oui_id;
348 reg model_no_reg = {0, 3};
349 int model_no, model_no_orig;
350
351 // 175 and 178 have the same oui ID.
352 reg oui_id_reg_178c = {5, 2}; // returns error on IP175C.
353 int is_178c = 0;
354
355 oui_id = getPhy(state, oui_id_reg);
356 if (oui_id != 0x0243) {
357 // non
358 return -ENODEV; // Not a IC+ chip.
359 }
360 oui_id = getPhy(state, oui_id_reg_178c);
361 if (oui_id == 0x0243) {
362 is_178c = 1;
363 }
364
365 model_no_orig = getPhy(state, model_no_reg);
366 if (model_no_orig < 0) {
367 return -ENODEV;
368 }
369 model_no = model_no_orig >> 4; // shift out revision number.
370 model_no &= 0x3f; // only take the model number (low 6 bits).
371 if (model_no == IP175A.MODEL_NO) {
372 state->regs = &IP175A;
373 } else if (model_no == IP175C.MODEL_NO) {
374 if (is_178c) {
375 state->regs = &IP178C;
376 } else {
377 state->regs = &IP175C;
378 }
379 } else {
380 printk(KERN_WARNING "ip175c: Found an unknown IC+ switch with model number %02Xh.\n", model_no_orig);
381 return -EPERM;
382 }
383 return 0;
384 }
385
386 /** Get only the vlan and router flags on the router **/
387 static int get_flags(struct ip175c_state *state)
388 {
389 int val;
390
391 state->router_mode = 0;
392 state->vlan_enabled = -1; // hack
393 state->num_vlans = 0;
394
395 if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
396 return 0; // not an error if it doesn't support enable vlan.
397 }
398
399 val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
400 if (val < 0) {
401 return val;
402 }
403 if (state->regs->ROUTER_EN_BIT >= 0)
404 state->router_mode = ((val>>state->regs->ROUTER_EN_BIT) & 1);
405
406 if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
407 state->num_vlans = (val >> state->regs->NUMLAN_GROUPS_BIT);
408 state->num_vlans &= (state->regs->NUMLAN_GROUPS_MAX-1);
409 state->num_vlans+=1; // does not include WAN.
410 }
411
412
413 val = getPhy(state, state->regs->VLAN_CONTROL_REG);
414 if (val < 0) {
415 return 0;
416 }
417 if (state->regs->TAG_VLAN_BIT >= 0)
418 state->vlan_enabled = ((val>>state->regs->TAG_VLAN_BIT) & 1);
419
420 return 0;
421 }
422 /** Get all state variables for VLAN mappings and port-based tagging. **/
423 static int get_state(struct ip175c_state *state)
424 {
425 int i, j;
426 int ret;
427 ret = get_flags(state);
428 if (ret < 0) {
429 return ret;
430 }
431 GET_PORT_BITS(state, state->remove_tag,
432 state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
433 GET_PORT_BITS(state, state->add_tag,
434 state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
435
436 if (state->vlan_enabled == -1) {
437 // not sure how to get this...
438 state->vlan_enabled = (!state->remove_tag && !state->add_tag);
439 }
440
441 if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
442 for (j=0; j<MAX_PORTS; j++) {
443 state->ports[j].shareports = 0; // initialize them in case.
444 }
445 for (j=0; j<state->regs->NUM_PORTS; j++) {
446 reg addr;
447 const bitnum *bit_lookup = (j%2==0)?
448 state->regs->VLAN_LOOKUP_EVEN_BIT:
449 state->regs->VLAN_LOOKUP_ODD_BIT;
450 addr = state->regs->VLAN_LOOKUP_REG;
451 if (state->regs->SIMPLE_VLAN_REGISTERS) {
452 addr.m += j;
453 } else {
454 switch (j) {
455 case 0:
456 case 1:
457 break;
458 case 2:
459 case 3:
460 addr.m+=1;
461 break;
462 case 4:
463 addr.m+=2;
464 break;
465 case 5:
466 addr = state->regs->VLAN_LOOKUP_REG_5;
467 break;
468 }
469 }
470
471 if (REG_SUPP(addr)) {
472 GET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
473 }
474 }
475 } else {
476 for (j=0; j<MAX_PORTS; j++) {
477 state->ports[j].shareports = 0xff;
478 }
479 }
480
481 for (i=0; i<MAX_PORTS; i++) {
482 if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
483 int val = getPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i]);
484 if (val < 0) {
485 return val;
486 }
487 state->ports[i].pvid = val;
488 } else {
489 state->ports[i].pvid = 0;
490 }
491 }
492
493 if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
494 for (j=0; j<MAX_VLANS; j++) {
495 reg addr = state->regs->TAG_VLAN_MASK_REG;
496 const bitnum *bit_lookup = (j%2==0)?
497 state->regs->TAG_VLAN_MASK_EVEN_BIT:
498 state->regs->TAG_VLAN_MASK_ODD_BIT;
499 if (state->regs->SIMPLE_VLAN_REGISTERS) {
500 addr.m += j;
501 } else {
502 addr.m += j/2;
503 }
504 GET_PORT_BITS(state, state->vlan_ports[j], addr, bit_lookup);
505 }
506 } else {
507 for (j=0; j<MAX_VLANS; j++) {
508 state->vlan_ports[j] = 0;
509 for (i=0; i<state->regs->NUM_PORTS; i++) {
510 if ((state->ports[i].pvid == j) ||
511 (state->ports[i].pvid == 0)) {
512 state->vlan_ports[j] |= (1<<i);
513 }
514 }
515 }
516 }
517
518 return 0;
519 }
520
521
522 /** Only update vlan and router flags in the switch **/
523 static int update_flags(struct ip175c_state *state)
524 {
525 int val;
526
527 if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
528 return 0;
529 }
530
531 val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
532 if (val < 0) {
533 return val;
534 }
535 if (state->regs->ROUTER_EN_BIT >= 0) {
536 if (state->router_mode) {
537 val |= (1<<state->regs->ROUTER_EN_BIT);
538 } else {
539 val &= (~(1<<state->regs->ROUTER_EN_BIT));
540 }
541 }
542 if (state->regs->TAG_VLAN_BIT >= 0) {
543 if (state->vlan_enabled) {
544 val |= (1<<state->regs->TAG_VLAN_BIT);
545 } else {
546 val &= (~(1<<state->regs->TAG_VLAN_BIT));
547 }
548 }
549 if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
550 val &= (~((state->regs->NUMLAN_GROUPS_MAX-1)<<state->regs->NUMLAN_GROUPS_BIT));
551 if (state->num_vlans > state->regs->NUMLAN_GROUPS_MAX) {
552 val |= state->regs->NUMLAN_GROUPS_MAX << state->regs->NUMLAN_GROUPS_BIT;
553 } else if (state->num_vlans >= 1) {
554 val |= (state->num_vlans-1) << state->regs->NUMLAN_GROUPS_BIT;
555 }
556 }
557 return setPhy(state, state->regs->ROUTER_CONTROL_REG, val);
558 }
559
560 /** Update all VLAN and port state. Usually you should call "correct_vlan_state" first. **/
561 static int update_state(struct ip175c_state *state)
562 {
563 int j;
564 int i;
565 SET_PORT_BITS(state, state->add_tag,
566 state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
567 SET_PORT_BITS(state, state->remove_tag,
568 state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
569
570 if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
571 for (j=0; j<state->regs->NUM_PORTS; j++) {
572 reg addr;
573 const bitnum *bit_lookup = (j%2==0)?
574 state->regs->VLAN_LOOKUP_EVEN_BIT:
575 state->regs->VLAN_LOOKUP_ODD_BIT;
576
577 // duplicate code -- sorry
578 addr = state->regs->VLAN_LOOKUP_REG;
579 if (state->regs->SIMPLE_VLAN_REGISTERS) {
580 addr.m += j;
581 } else {
582 switch (j) {
583 case 0:
584 case 1:
585 break;
586 case 2:
587 case 3:
588 addr.m+=1;
589 break;
590 case 4:
591 addr.m+=2;
592 break;
593 case 5:
594 addr = state->regs->VLAN_LOOKUP_REG_5;
595 break;
596 default:
597 addr.m = -1; // shouldn't get here, but...
598 break;
599 }
600 }
601 //printf("shareports for %d is %02X\n",j,state->ports[j].shareports);
602 if (REG_SUPP(addr)) {
603 SET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
604 }
605 }
606 }
607 if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
608 for (j=0; j<MAX_VLANS; j++) {
609 reg addr = state->regs->TAG_VLAN_MASK_REG;
610 const bitnum *bit_lookup = (j%2==0)?
611 state->regs->TAG_VLAN_MASK_EVEN_BIT:
612 state->regs->TAG_VLAN_MASK_ODD_BIT;
613 unsigned int vlan_mask;
614 if (state->regs->SIMPLE_VLAN_REGISTERS) {
615 addr.m += j;
616 } else {
617 addr.m += j/2;
618 }
619 vlan_mask = state->vlan_ports[j];
620 SET_PORT_BITS(state, vlan_mask, addr, bit_lookup);
621 }
622 }
623
624 for (i=0; i<MAX_PORTS; i++) {
625 if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
626 int err = setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i],
627 state->ports[i].pvid);
628 if (err < 0) {
629 return err;
630 }
631 }
632 }
633
634 return update_flags(state);
635
636 // software reset: 30.0 = 0x175C
637 // wait 2ms
638 // reset ports 0,1,2,3,4
639 }
640
641 /*
642 Uses only the VLAN port mask and the add tag mask to generate the other fields:
643 which ports are part of the same VLAN, removing vlan tags, and VLAN tag ids.
644 */
645 static void correct_vlan_state(struct ip175c_state *state)
646 {
647 int i, j;
648 state->num_vlans = 0;
649 for (i=0; i<MAX_VLANS; i++) {
650 if (state->vlan_ports[i] != 0) {
651 state->num_vlans = i+1; //hack -- we need to store the "set" vlans somewhere...
652 }
653 }
654
655
656
657 for (i=0; i<state->regs->NUM_PORTS; i++) {
658 unsigned int portmask = (1<<i);
659 if (!state->vlan_enabled) {
660 // share with everybody!
661 state->ports[i].shareports = (1<<state->regs->NUM_PORTS)-1;
662 continue;
663 }
664 state->ports[i].shareports = portmask;
665 for (j=0; j<MAX_VLANS; j++) {
666 if (state->vlan_ports[j] & portmask)
667 state->ports[i].shareports |= state->vlan_ports[j];
668 }
669 }
670 state->remove_tag = ((~state->add_tag) & ((1<<state->regs->NUM_PORTS)-1));
671 }
672
673 static int ip175c_get_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
674 {
675 struct ip175c_state *state = dev->priv;
676 int err;
677
678 err = get_state(state); // may be set in get_state.
679 if (err < 0)
680 return err;
681 val->value.i = state->vlan_enabled;
682 return 0;
683 }
684
685 static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
686 {
687 struct ip175c_state *state = dev->priv;
688 int err;
689 int enable;
690 int i;
691
692 err = get_state(state);
693 if (err < 0)
694 return err;
695 enable = val->value.i;
696
697 if (state->vlan_enabled == enable) {
698 // do not change any state.
699 return 0;
700 }
701 state->vlan_enabled = enable;
702
703 // Otherwise, if we are switching state, set fields to a known default.
704 state->remove_tag = 0x0000;
705 state->add_tag = 0x0000;
706 for (i = 0; i < MAX_PORTS; i++)
707 state->ports[i].shareports = 0xffff;
708
709 for (i = 0; i < MAX_VLANS; i++)
710 state->vlan_ports[i] = 0x0;
711
712 if (state->vlan_enabled) {
713 // updates other fields only based off vlan_ports and add_tag fields.
714 // Note that by default, no ports are in any vlans.
715 correct_vlan_state(state);
716 }
717 // ensure sane defaults?
718 return update_state(state);
719 }
720
721 static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
722 {
723 struct ip175c_state *state = dev->priv;
724 int err;
725 int b;
726 int ind;
727 unsigned int ports;
728
729 if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
730 return -EINVAL;
731
732 err = get_state(state);
733 if (err<0)
734 return err;
735
736 ports = state->vlan_ports[val->port_vlan];
737 b = 0;
738 ind = 0;
739 while (b < MAX_PORTS) {
740 if (ports&1) {
741 int istagged = ((state->add_tag >> b) & 1);
742 val->value.ports[ind].id = b;
743 val->value.ports[ind].flags = (istagged << SWITCH_PORT_FLAG_TAGGED);
744 ind++;
745 }
746 b++;
747 ports >>= 1;
748 }
749 val->len = ind;
750
751 return 0;
752 }
753
754 static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
755 {
756 struct ip175c_state *state = dev->priv;
757 int i;
758 int err;
759
760 if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
761 return -EINVAL;
762
763 err = get_state(state);
764 if (err < 0)
765 return err;
766
767 state->vlan_ports[val->port_vlan] = 0;
768 for (i = 0; i < val->len; i++) {
769 int bitmask = (1<<val->value.ports[i].id);
770 state->vlan_ports[val->port_vlan] |= bitmask;
771 if (val->value.ports[i].flags & (1<<SWITCH_PORT_FLAG_TAGGED)) {
772 state->add_tag |= bitmask;
773 } else {
774 state->add_tag &= (~bitmask);
775 }
776 }
777
778 correct_vlan_state(state);
779 err = update_state(state);
780
781 return err;
782 }
783
784 static int ip175c_apply(struct switch_dev *dev)
785 {
786 struct ip175c_state *state = dev->priv;
787 int err;
788
789 err = get_flags(state);
790 if (err < 0)
791 return err;
792
793 if (REG_SUPP(state->regs->MII_REGISTER_EN)){
794 int val = getPhy(state, state->regs->MII_REGISTER_EN);
795 if (val < 0) {
796 return val;
797 }
798 val |= (1<<state->regs->MII_REGISTER_EN_BIT);
799 return setPhy(state, state->regs->MII_REGISTER_EN, val);
800 }
801 return 0;
802 }
803
804 static int ip175c_reset(struct switch_dev *dev)
805 {
806 struct ip175c_state *state = dev->priv;
807 int i, err;
808
809 err = get_flags(state);
810 if (err < 0)
811 return err;
812
813 if (REG_SUPP(state->regs->RESET_REG)) {
814 err = setPhy(state, state->regs->RESET_REG, state->regs->RESET_VAL);
815 if (err < 0)
816 return err;
817 err = getPhy(state, state->regs->RESET_REG);
818
819 /* data sheet specifies reset period is 2 msec
820 (don't see any mention of the 2ms delay in the IP178C spec, only
821 in IP175C, but it can't hurt.) */
822 mdelay(2);
823 }
824
825 if (REG_SUPP(state->regs->MODE_REG)) {
826 err = setPhy(state, state->regs->MODE_REG, state->regs->RESET_VAL);
827 if (err < 0)
828 return err;
829 err = getPhy(state, state->regs->MODE_REG);
830 }
831
832 /* reset switch ports */
833 for (i = 0; i < 5; i++) {
834 err = state->mii_bus->write(state->mii_bus, i,
835 MII_BMCR, BMCR_RESET);
836 if (err < 0)
837 return err;
838 }
839
840 return 0;
841 }
842
843 /*! get the current register number */
844 static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
845 {
846 struct ip175c_state *state = dev->priv;
847 int err;
848
849 err = get_state(state);
850 if (err < 0)
851 return err;
852
853 if (state->add_tag & (1<<val->port_vlan)) {
854 if (state->remove_tag & (1<<val->port_vlan))
855 val->value.i = 3; // shouldn't ever happen.
856 else
857 val->value.i = 1;
858 } else {
859 if (state->remove_tag & (1<<val->port_vlan))
860 val->value.i = 0;
861 else
862 val->value.i = 2;
863 }
864 return 0;
865 }
866
867 /*! set a new register address for low level access to registers */
868 static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
869 {
870 struct ip175c_state *state = dev->priv;
871 int err;
872
873 err = get_state(state);
874 if (err < 0)
875 return err;
876
877 state->add_tag &= ~(1<<val->port_vlan);
878 state->remove_tag &= ~(1<<val->port_vlan);
879
880 if (val->value.i == 0)
881 state->remove_tag |= (1<<val->port_vlan);
882 if (val->value.i == 1)
883 state->add_tag |= (1<<val->port_vlan);
884
885 SET_PORT_BITS(state, state->add_tag,
886 state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
887 SET_PORT_BITS(state, state->remove_tag,
888 state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
889
890 return err;
891 }
892
893
894 /* low level /proc procedures */
895
896 /*! get the current phy address */
897 static int ip175c_get_phy(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
898 {
899 struct ip175c_state *state = dev->priv;
900
901 val->value.i = state->proc_mii.p;
902 return 0;
903 }
904
905 /*! set a new phy address for low level access to registers */
906 static int ip175c_set_phy(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
907 {
908 struct ip175c_state *state = dev->priv;
909 int new_reg = val->value.i;
910
911 if (new_reg < 0 || new_reg > 31)
912 state->proc_mii.p = (u16)-1;
913 else
914 state->proc_mii.p = (u16)new_reg;
915 return 0;
916 }
917
918 /*! get the current register number */
919 static int ip175c_get_reg(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
920 {
921 struct ip175c_state *state = dev->priv;
922
923 val->value.i = state->proc_mii.m;
924 return 0;
925 }
926
927 /*! set a new register address for low level access to registers */
928 static int ip175c_set_reg(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
929 {
930 struct ip175c_state *state = dev->priv;
931 int new_reg = val->value.i;
932
933 if (new_reg < 0 || new_reg > 31)
934 state->proc_mii.m = (u16)-1;
935 else
936 state->proc_mii.m = (u16)new_reg;
937 return 0;
938 }
939
940 /*! get the register content of state->proc_mii */
941 static int ip175c_get_val(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
942 {
943 struct ip175c_state *state = dev->priv;
944 int retval = -EINVAL;
945 if (REG_SUPP(state->proc_mii))
946 retval = getPhy(state, state->proc_mii);
947
948 if (retval < 0) {
949 return retval;
950 } else {
951 val->value.i = retval;
952 return 0;
953 }
954 }
955
956 /*! write a value to the register defined by phy/reg above */
957 static int ip175c_set_val(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
958 {
959 struct ip175c_state *state = dev->priv;
960 int myval, err = 0;
961
962 myval = val->value.i;
963 if (myval <= 0xffff && myval >= 0 && REG_SUPP(state->proc_mii)) {
964 err = setPhy(state, state->proc_mii, (u16)myval);
965 }
966 return err;
967 }
968
969 static int ip175c_read_name(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
970 {
971 struct ip175c_state *state = dev->priv;
972 val->value.s = state->regs->NAME; // just a const pointer, won't be freed by swconfig.
973 return 0;
974 }
975
976
977 static int ip175c_set_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
978 {
979 struct ip175c_state *state = dev->priv;
980 struct mii_bus *bus = state->mii_bus;
981 int nr = val->port_vlan;
982 int ctrl;
983 int autoneg;
984 int speed;
985 if (val->value.i == 100) {
986 speed = 1;
987 autoneg = 0;
988 } else if (val->value.i == 10) {
989 speed = 0;
990 autoneg = 0;
991 } else {
992 autoneg = 1;
993 speed = 1;
994 }
995
996 /* can't set speed for cpu port */
997 if (nr == state->regs->CPU_PORT)
998 return -EINVAL;
999
1000 if (nr >= dev->ports || nr < 0)
1001 return -EINVAL;
1002
1003 ctrl = ip_phy_read(bus, nr, 0);
1004 if (ctrl < 0)
1005 return -EIO;
1006
1007 ctrl &= (~(1<<12));
1008 ctrl &= (~(1<<13));
1009 ctrl |= (autoneg<<12);
1010 ctrl |= (speed<<13);
1011
1012 return ip_phy_write(bus, nr, 0, ctrl);
1013 }
1014
1015 static int ip175c_get_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1016 {
1017 struct ip175c_state *state = dev->priv;
1018 struct mii_bus *bus = state->mii_bus;
1019 int nr = val->port_vlan;
1020 int speed, status;
1021
1022 if (nr == state->regs->CPU_PORT) {
1023 val->value.i = 100;
1024 return 0;
1025 }
1026
1027 if (nr >= dev->ports || nr < 0)
1028 return -EINVAL;
1029
1030 status = ip_phy_read(bus, nr, 1);
1031 speed = ip_phy_read(bus, nr, 18);
1032 if (status < 0 || speed < 0)
1033 return -EIO;
1034
1035 if (status & 4)
1036 val->value.i = ((speed & (1<<11)) ? 100 : 10);
1037 else
1038 val->value.i = 0;
1039
1040 return 0;
1041 }
1042
1043
1044 static int ip175c_get_port_status(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1045 {
1046 struct ip175c_state *state = dev->priv;
1047 struct mii_bus *bus = state->mii_bus;
1048 int ctrl, speed, status;
1049 int nr = val->port_vlan;
1050 int len;
1051 char *buf = state->buf; // fixed-length at 80.
1052
1053 if (nr == state->regs->CPU_PORT) {
1054 sprintf(buf, "up, 100 Mbps, cpu port");
1055 val->value.s = buf;
1056 return 0;
1057 }
1058
1059 if (nr >= dev->ports || nr < 0)
1060 return -EINVAL;
1061
1062 ctrl = ip_phy_read(bus, nr, 0);
1063 status = ip_phy_read(bus, nr, 1);
1064 speed = ip_phy_read(bus, nr, 18);
1065 if (ctrl < 0 || status < 0 || speed < 0)
1066 return -EIO;
1067
1068 if (status & 4)
1069 len = sprintf(buf, "up, %d Mbps, %s duplex",
1070 ((speed & (1<<11)) ? 100 : 10),
1071 ((speed & (1<<10)) ? "full" : "half"));
1072 else
1073 len = sprintf(buf, "down");
1074
1075 if (ctrl & (1<<12)) {
1076 len += sprintf(buf+len, ", auto-negotiate");
1077 if (!(status & (1<<5)))
1078 len += sprintf(buf+len, " (in progress)");
1079 } else {
1080 len += sprintf(buf+len, ", fixed speed (%d)",
1081 ((ctrl & (1<<13)) ? 100 : 10));
1082 }
1083
1084 buf[len] = '\0';
1085 val->value.s = buf;
1086 return 0;
1087 }
1088
1089 static int ip175c_get_pvid(struct switch_dev *dev, int port, int *val)
1090 {
1091 struct ip175c_state *state = dev->priv;
1092
1093 *val = state->ports[port].pvid;
1094 return 0;
1095 }
1096
1097 static int ip175c_set_pvid(struct switch_dev *dev, int port, int val)
1098 {
1099 struct ip175c_state *state = dev->priv;
1100
1101 state->ports[port].pvid = val;
1102
1103 if (!REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[port]))
1104 return 0;
1105
1106 return setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[port], val);
1107 }
1108
1109
1110 enum Ports {
1111 IP175C_PORT_STATUS,
1112 IP175C_PORT_LINK,
1113 IP175C_PORT_TAGGED,
1114 IP175C_PORT_PVID,
1115 };
1116
1117 enum Globals {
1118 IP175C_RESET,
1119 IP175C_ENABLE_VLAN,
1120 IP175C_GET_NAME,
1121 IP175C_REGISTER_PHY,
1122 IP175C_REGISTER_MII,
1123 IP175C_REGISTER_VALUE,
1124 IP175C_REGISTER_ERRNO,
1125 };
1126
1127 static const struct switch_attr ip175c_global[] = {
1128 [IP175C_ENABLE_VLAN] = {
1129 .id = IP175C_ENABLE_VLAN,
1130 .type = SWITCH_TYPE_INT,
1131 .name = "enable_vlan",
1132 .description = "Flag to enable or disable VLANs and tagging",
1133 .get = ip175c_get_enable_vlan,
1134 .set = ip175c_set_enable_vlan,
1135 },
1136 [IP175C_GET_NAME] = {
1137 .id = IP175C_GET_NAME,
1138 .type = SWITCH_TYPE_STRING,
1139 .description = "Returns the type of IC+ chip.",
1140 .name = "name",
1141 .get = ip175c_read_name,
1142 .set = NULL,
1143 },
1144 /* jal: added for low level debugging etc. */
1145 [IP175C_REGISTER_PHY] = {
1146 .id = IP175C_REGISTER_PHY,
1147 .type = SWITCH_TYPE_INT,
1148 .description = "Direct register access: set phy (0-4, or 29,30,31)",
1149 .name = "phy",
1150 .get = ip175c_get_phy,
1151 .set = ip175c_set_phy,
1152 },
1153 [IP175C_REGISTER_MII] = {
1154 .id = IP175C_REGISTER_MII,
1155 .type = SWITCH_TYPE_INT,
1156 .description = "Direct register access: set mii number (0-31)",
1157 .name = "reg",
1158 .get = ip175c_get_reg,
1159 .set = ip175c_set_reg,
1160 },
1161 [IP175C_REGISTER_VALUE] = {
1162 .id = IP175C_REGISTER_VALUE,
1163 .type = SWITCH_TYPE_INT,
1164 .description = "Direct register access: read/write to register (0-65535)",
1165 .name = "val",
1166 .get = ip175c_get_val,
1167 .set = ip175c_set_val,
1168 },
1169 };
1170
1171 static const struct switch_attr ip175c_vlan[] = {
1172 };
1173
1174 static const struct switch_attr ip175c_port[] = {
1175 [IP175C_PORT_STATUS] = {
1176 .id = IP175C_PORT_STATUS,
1177 .type = SWITCH_TYPE_STRING,
1178 .description = "Returns Detailed port status",
1179 .name = "status",
1180 .get = ip175c_get_port_status,
1181 .set = NULL,
1182 },
1183 [IP175C_PORT_LINK] = {
1184 .id = IP175C_PORT_LINK,
1185 .type = SWITCH_TYPE_INT,
1186 .description = "Link speed. Can write 0 for auto-negotiate, or 10 or 100",
1187 .name = "link",
1188 .get = ip175c_get_port_speed,
1189 .set = ip175c_set_port_speed,
1190 },
1191 [IP175C_PORT_TAGGED] = {
1192 .id = IP175C_PORT_LINK,
1193 .type = SWITCH_TYPE_INT,
1194 .description = "0 = untag, 1 = add tags, 2 = do not alter (This value is reset if vlans are altered)",
1195 .name = "tagged",
1196 .get = ip175c_get_tagged,
1197 .set = ip175c_set_tagged,
1198 },
1199 };
1200
1201 static int ip175c_probe(struct phy_device *pdev)
1202 {
1203 struct ip175c_state *state;
1204 struct switch_dev *dev;
1205 int err;
1206
1207 /* we only attach to PHY 0, but use all available PHYs */
1208 if (pdev->addr != 0)
1209 return -ENODEV;
1210
1211 state = kzalloc(sizeof(*state), GFP_KERNEL);
1212 if (!state)
1213 return -ENOMEM;
1214
1215 dev = &state->dev;
1216 dev->attr_global.attr = ip175c_global;
1217 dev->attr_global.n_attr = ARRAY_SIZE(ip175c_global);
1218 dev->attr_port.attr = ip175c_port;
1219 dev->attr_port.n_attr = ARRAY_SIZE(ip175c_port);
1220 dev->attr_vlan.attr = ip175c_vlan;
1221 dev->attr_vlan.n_attr = ARRAY_SIZE(ip175c_vlan);
1222
1223 dev->get_port_pvid = ip175c_get_pvid;
1224 dev->set_port_pvid = ip175c_set_pvid;
1225 dev->get_vlan_ports = ip175c_get_ports;
1226 dev->set_vlan_ports = ip175c_set_ports;
1227 dev->apply_config = ip175c_apply;
1228 dev->reset_switch = ip175c_reset;
1229
1230 dev->priv = state;
1231 pdev->priv = state;
1232 state->mii_bus = pdev->bus;
1233
1234 err = get_model(state);
1235 if (err < 0)
1236 goto error;
1237
1238 dev->vlans = MAX_VLANS;
1239 dev->cpu_port = state->regs->CPU_PORT;
1240 dev->ports = state->regs->NUM_PORTS;
1241 dev->name = state->regs->NAME;
1242
1243 return 0;
1244
1245 error:
1246 kfree(state);
1247 return err;
1248 }
1249
1250 static int ip175c_config_init(struct phy_device *pdev)
1251 {
1252 struct ip175c_state *state = pdev->priv;
1253 struct net_device *dev = pdev->attached_dev;
1254 int err;
1255
1256 pdev->irq = PHY_IGNORE_INTERRUPT;
1257 err = register_switch(&state->dev, dev);
1258 if (err < 0)
1259 return err;
1260
1261 ip175c_reset(&state->dev);
1262
1263 state->registered = true;
1264 netif_carrier_on(pdev->attached_dev);
1265
1266 return 0;
1267 }
1268
1269 static void ip175c_remove(struct phy_device *pdev)
1270 {
1271 struct ip175c_state *state = pdev->priv;
1272
1273 if (state->registered)
1274 unregister_switch(&state->dev);
1275 kfree(state);
1276 }
1277
1278 static int ip175c_config_aneg(struct phy_device *pdev)
1279 {
1280 return 0;
1281 }
1282
1283 static int ip175c_read_status(struct phy_device *pdev)
1284 {
1285 pdev->speed = SPEED_100;
1286 pdev->duplex = DUPLEX_FULL;
1287 pdev->pause = pdev->asym_pause = 0;
1288 return 0;
1289 }
1290
1291 static struct phy_driver ip175c_driver = {
1292 .name = "IC+ IP175C",
1293 .phy_id = 0x02430d80,
1294 .phy_id_mask = 0x0ffffff0,
1295 .features = PHY_BASIC_FEATURES,
1296 .probe = ip175c_probe,
1297 .remove = ip175c_remove,
1298 .config_init = ip175c_config_init,
1299 .config_aneg = ip175c_config_aneg,
1300 .read_status = ip175c_read_status,
1301 .driver = { .owner = THIS_MODULE },
1302 };
1303
1304
1305 int __init ip175c_init(void)
1306 {
1307 return phy_driver_register(&ip175c_driver);
1308 }
1309
1310 void __exit ip175c_exit(void)
1311 {
1312 phy_driver_unregister(&ip175c_driver);
1313 }
1314
1315 MODULE_AUTHOR("Patrick Horn <patrick.horn@gmail.com>");
1316 MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
1317 MODULE_LICENSE("GPL");
1318
1319 module_init(ip175c_init);
1320 module_exit(ip175c_exit);
1321
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