Root/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
32typedef struct ip175c_reg {
33    u16 p; // phy
34    u16 m; // mii
35} reg;
36typedef 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 ***********/
43struct 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
100static 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
144static 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
188static 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,-1,-1,-1,-1},
200
201    .SIMPLE_VLAN_REGISTERS = 0,
202
203    // Register 19-21 documentation is missing/contradictory.
204    // For registers 19-21 ports need to be: even numbers to MSB, odd to LSB.
205    // This contradicts text for ROM registers, but follows logic of CoS bits.
206
207    .VLAN_LOOKUP_REG = {0,19},// +N/2
208    .VLAN_LOOKUP_REG_5 = NOTSUPPORTED,
209    .VLAN_LOOKUP_EVEN_BIT = {8,9,10,11,12,-1,-1,-1,-1},
210    .VLAN_LOOKUP_ODD_BIT = {0,1,2,3,4,-1,-1,-1,-1},
211
212    .TAG_VLAN_MASK_REG = NOTSUPPORTED, // +N/2,
213    .TAG_VLAN_MASK_EVEN_BIT = {-1,-1,-1,-1,-1,-1,-1,-1,-1},
214    .TAG_VLAN_MASK_ODD_BIT = {-1,-1,-1,-1,-1,-1,-1,-1,-1},
215
216    .RESET_VAL = -1,
217    .RESET_REG = NOTSUPPORTED,
218    .MODE_VAL = 0,
219    .MODE_REG = NOTSUPPORTED,
220
221    .ROUTER_CONTROL_REG = NOTSUPPORTED,
222    .VLAN_CONTROL_REG = NOTSUPPORTED,
223    .TAG_VLAN_BIT = -1,
224    .ROUTER_EN_BIT = -1,
225    .NUMLAN_GROUPS_MAX = -1,
226    .NUMLAN_GROUPS_BIT = -1, // {0-2}
227
228    .NUM_PORTS = 5,
229    .CPU_PORT = 4,
230
231    .MII_REGISTER_EN = {0, 18},
232    .MII_REGISTER_EN_BIT = 7,
233};
234
235
236struct ip175c_state {
237    struct switch_dev dev;
238    struct mii_bus *mii_bus;
239    bool registered;
240
241    int router_mode; // ROUTER_EN
242    int vlan_enabled; // TAG_VLAN_EN
243    struct port_state {
244        u16 pvid;
245        unsigned int shareports;
246    } ports[MAX_PORTS];
247    unsigned int add_tag;
248    unsigned int remove_tag;
249    int num_vlans;
250    unsigned int vlan_ports[MAX_VLANS];
251    const struct register_mappings *regs;
252    reg proc_mii; /*!< phy/reg for the low level register access via /proc */
253
254    char buf[80];
255};
256
257static int ip_phy_read(struct mii_bus *bus, int port, int reg)
258{
259    int val;
260
261    mutex_lock(&bus->mdio_lock);
262    val = bus->read(bus, port, reg);
263    mutex_unlock(&bus->mdio_lock);
264
265    return val;
266}
267
268
269static int ip_phy_write(struct mii_bus *bus, int port, int reg, u16 val)
270{
271    int err;
272
273    mutex_lock(&bus->mdio_lock);
274    err = bus->write(bus, port, reg, val);
275    mutex_unlock(&bus->mdio_lock);
276
277    return err;
278}
279
280
281static int getPhy (struct ip175c_state *state, reg mii)
282{
283    struct mii_bus *bus = state->mii_bus;
284    int val;
285
286    if (!REG_SUPP(mii))
287        return -EFAULT;
288
289    val = ip_phy_read(bus, mii.p, mii.m);
290    if (val < 0)
291        pr_warning("IP175C: Unable to get MII register %d,%d: error %d\n", mii.p,mii.m,-val);
292
293    return val;
294}
295
296static int setPhy (struct ip175c_state *state, reg mii, u16 value)
297{
298    struct mii_bus *bus = state->mii_bus;
299    int err;
300
301    if (!REG_SUPP(mii))
302        return -EFAULT;
303
304    err = ip_phy_write(bus, mii.p, mii.m, value);
305    if (err < 0) {
306        pr_warning("IP175C: Unable to set MII register %d,%d to %d: error %d\n", mii.p,mii.m,value,-err);
307        return err;
308    }
309    mdelay(2);
310    getPhy(state, mii);
311    return 0;
312}
313
314/**
315 * These two macros are to simplify the mapping of logical bits to the bits in hardware.
316 * NOTE: these macros will return if there is an error!
317 */
318
319#define GET_PORT_BITS(state, bits, addr, bit_lookup) \
320    do { \
321        int i, val = getPhy((state), (addr)); \
322        if (val < 0) \
323            return val; \
324        (bits) = 0; \
325        for (i = 0; i < MAX_PORTS; i++) { \
326            if ((bit_lookup)[i] == -1) continue; \
327            if (val & (1<<(bit_lookup)[i])) \
328                (bits) |= (1<<i); \
329        } \
330    } while (0)
331
332#define SET_PORT_BITS(state, bits, addr, bit_lookup) \
333    do { \
334        int i, val = getPhy((state), (addr)); \
335        if (val < 0) \
336            return val; \
337        for (i = 0; i < MAX_PORTS; i++) { \
338            unsigned int newmask = ((bits)&(1<<i)); \
339            if ((bit_lookup)[i] == -1) continue; \
340            val &= ~(1<<(bit_lookup)[i]); \
341            val |= ((newmask>>i)<<(bit_lookup)[i]); \
342        } \
343        val = setPhy((state), (addr), val); \
344        if (val < 0) \
345            return val; \
346    } while (0)
347
348static int get_model(struct ip175c_state *state)
349{
350    reg oui_id_reg = {0, 2};
351    int oui_id;
352    reg model_no_reg = {0, 3};
353    int model_no, model_no_orig;
354
355    // 175 and 178 have the same oui ID.
356    reg oui_id_reg_178c = {5, 2}; // returns error on IP175C.
357    int is_178c = 0;
358
359    oui_id = getPhy(state, oui_id_reg);
360    if (oui_id != 0x0243) {
361        // non
362        return -ENODEV; // Not a IC+ chip.
363    }
364    oui_id = getPhy(state, oui_id_reg_178c);
365    if (oui_id == 0x0243) {
366        is_178c = 1;
367    }
368
369    model_no_orig = getPhy(state, model_no_reg);
370    if (model_no_orig < 0) {
371        return -ENODEV;
372    }
373    model_no = model_no_orig >> 4; // shift out revision number.
374    model_no &= 0x3f; // only take the model number (low 6 bits).
375    if (model_no == IP175A.MODEL_NO) {
376        state->regs = &IP175A;
377    } else if (model_no == IP175C.MODEL_NO) {
378        if (is_178c) {
379            state->regs = &IP178C;
380        } else {
381            state->regs = &IP175C;
382        }
383    } else {
384        printk(KERN_WARNING "ip175c: Found an unknown IC+ switch with model number %02Xh.\n", model_no_orig);
385        return -EPERM;
386    }
387    return 0;
388}
389
390/** Get only the vlan and router flags on the router **/
391static int get_flags(struct ip175c_state *state)
392{
393    int val;
394
395    state->router_mode = 0;
396    state->vlan_enabled = -1; // hack
397    state->num_vlans = 0;
398
399    if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
400        return 0; // not an error if it doesn't support enable vlan.
401    }
402
403    val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
404    if (val < 0) {
405        return val;
406    }
407    if (state->regs->ROUTER_EN_BIT >= 0)
408        state->router_mode = ((val>>state->regs->ROUTER_EN_BIT) & 1);
409
410    if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
411        state->num_vlans = (val >> state->regs->NUMLAN_GROUPS_BIT);
412        state->num_vlans &= (state->regs->NUMLAN_GROUPS_MAX-1);
413        state->num_vlans+=1; // does not include WAN.
414    }
415
416
417    val = getPhy(state, state->regs->VLAN_CONTROL_REG);
418    if (val < 0) {
419        return 0;
420    }
421    if (state->regs->TAG_VLAN_BIT >= 0)
422        state->vlan_enabled = ((val>>state->regs->TAG_VLAN_BIT) & 1);
423
424    return 0;
425}
426/** Get all state variables for VLAN mappings and port-based tagging. **/
427static int get_state(struct ip175c_state *state)
428{
429    int i, j;
430    int ret;
431    ret = get_flags(state);
432    if (ret < 0) {
433        return ret;
434    }
435    GET_PORT_BITS(state, state->remove_tag,
436                  state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
437    GET_PORT_BITS(state, state->add_tag,
438                  state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
439
440    if (state->vlan_enabled == -1) {
441        // not sure how to get this...
442        state->vlan_enabled = (state->remove_tag || state->add_tag);
443    }
444
445    if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
446    for (j=0; j<MAX_PORTS; j++) {
447        state->ports[j].shareports = 0; // initialize them in case.
448    }
449    for (j=0; j<state->regs->NUM_PORTS; j++) {
450        reg addr;
451        const bitnum *bit_lookup = (j%2==0)?
452            state->regs->VLAN_LOOKUP_EVEN_BIT:
453            state->regs->VLAN_LOOKUP_ODD_BIT;
454        addr = state->regs->VLAN_LOOKUP_REG;
455        if (state->regs->SIMPLE_VLAN_REGISTERS) {
456            addr.m += j;
457        } else {
458            switch (j) {
459            case 0:
460            case 1:
461                break;
462            case 2:
463            case 3:
464                addr.m+=1;
465                break;
466            case 4:
467                addr.m+=2;
468                break;
469            case 5:
470                addr = state->regs->VLAN_LOOKUP_REG_5;
471                break;
472            }
473        }
474
475        if (REG_SUPP(addr)) {
476            GET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
477        }
478    }
479    } else {
480        for (j=0; j<MAX_PORTS; j++) {
481            state->ports[j].shareports = 0xff;
482        }
483    }
484
485    for (i=0; i<MAX_PORTS; i++) {
486        if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
487            int val = getPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i]);
488            if (val < 0) {
489                return val;
490            }
491            state->ports[i].pvid = val;
492        } else {
493            state->ports[i].pvid = 0;
494        }
495    }
496
497    if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
498        for (j=0; j<MAX_VLANS; j++) {
499            reg addr = state->regs->TAG_VLAN_MASK_REG;
500            const bitnum *bit_lookup = (j%2==0)?
501                state->regs->TAG_VLAN_MASK_EVEN_BIT:
502                state->regs->TAG_VLAN_MASK_ODD_BIT;
503            if (state->regs->SIMPLE_VLAN_REGISTERS) {
504                addr.m += j;
505            } else {
506                addr.m += j/2;
507            }
508            GET_PORT_BITS(state, state->vlan_ports[j], addr, bit_lookup);
509        }
510    } else {
511        for (j=0; j<MAX_VLANS; j++) {
512            state->vlan_ports[j] = 0;
513            for (i=0; i<state->regs->NUM_PORTS; i++) {
514                if ((state->ports[i].pvid == j) ||
515                        (state->ports[i].pvid == 0)) {
516                    state->vlan_ports[j] |= (1<<i);
517                }
518            }
519        }
520    }
521
522    return 0;
523}
524
525
526/** Only update vlan and router flags in the switch **/
527static int update_flags(struct ip175c_state *state)
528{
529    int val;
530
531    if (!REG_SUPP(state->regs->ROUTER_CONTROL_REG)) {
532        return 0;
533    }
534
535    val = getPhy(state, state->regs->ROUTER_CONTROL_REG);
536    if (val < 0) {
537        return val;
538    }
539    if (state->regs->ROUTER_EN_BIT >= 0) {
540        if (state->router_mode) {
541            val |= (1<<state->regs->ROUTER_EN_BIT);
542        } else {
543            val &= (~(1<<state->regs->ROUTER_EN_BIT));
544        }
545    }
546    if (state->regs->TAG_VLAN_BIT >= 0) {
547        if (state->vlan_enabled) {
548            val |= (1<<state->regs->TAG_VLAN_BIT);
549        } else {
550            val &= (~(1<<state->regs->TAG_VLAN_BIT));
551        }
552    }
553    if (state->regs->NUMLAN_GROUPS_BIT >= 0) {
554        val &= (~((state->regs->NUMLAN_GROUPS_MAX-1)<<state->regs->NUMLAN_GROUPS_BIT));
555        if (state->num_vlans > state->regs->NUMLAN_GROUPS_MAX) {
556            val |= state->regs->NUMLAN_GROUPS_MAX << state->regs->NUMLAN_GROUPS_BIT;
557        } else if (state->num_vlans >= 1) {
558            val |= (state->num_vlans-1) << state->regs->NUMLAN_GROUPS_BIT;
559        }
560    }
561    return setPhy(state, state->regs->ROUTER_CONTROL_REG, val);
562}
563
564/** Update all VLAN and port state. Usually you should call "correct_vlan_state" first. **/
565static int update_state(struct ip175c_state *state)
566{
567    int j;
568    int i;
569    SET_PORT_BITS(state, state->add_tag,
570                  state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
571    SET_PORT_BITS(state, state->remove_tag,
572                  state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
573
574    if (REG_SUPP(state->regs->VLAN_LOOKUP_REG)) {
575    for (j=0; j<state->regs->NUM_PORTS; j++) {
576        reg addr;
577        const bitnum *bit_lookup = (j%2==0)?
578            state->regs->VLAN_LOOKUP_EVEN_BIT:
579            state->regs->VLAN_LOOKUP_ODD_BIT;
580
581        // duplicate code -- sorry
582        addr = state->regs->VLAN_LOOKUP_REG;
583        if (state->regs->SIMPLE_VLAN_REGISTERS) {
584            addr.m += j;
585        } else {
586            switch (j) {
587            case 0:
588            case 1:
589                break;
590            case 2:
591            case 3:
592                addr.m+=1;
593                break;
594            case 4:
595                addr.m+=2;
596                break;
597            case 5:
598                addr = state->regs->VLAN_LOOKUP_REG_5;
599                break;
600            default:
601                addr.m = -1; // shouldn't get here, but...
602                break;
603            }
604        }
605        //printf("shareports for %d is %02X\n",j,state->ports[j].shareports);
606        if (REG_SUPP(addr)) {
607            SET_PORT_BITS(state, state->ports[j].shareports, addr, bit_lookup);
608        }
609    }
610    }
611    if (REG_SUPP(state->regs->TAG_VLAN_MASK_REG)) {
612    for (j=0; j<MAX_VLANS; j++) {
613        reg addr = state->regs->TAG_VLAN_MASK_REG;
614        const bitnum *bit_lookup = (j%2==0)?
615            state->regs->TAG_VLAN_MASK_EVEN_BIT:
616            state->regs->TAG_VLAN_MASK_ODD_BIT;
617        unsigned int vlan_mask;
618        if (state->regs->SIMPLE_VLAN_REGISTERS) {
619            addr.m += j;
620        } else {
621            addr.m += j/2;
622        }
623        vlan_mask = state->vlan_ports[j];
624        SET_PORT_BITS(state, vlan_mask, addr, bit_lookup);
625    }
626    }
627
628    for (i=0; i<MAX_PORTS; i++) {
629        if (REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[i])) {
630            int err = setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[i],
631                    state->ports[i].pvid);
632            if (err < 0) {
633                return err;
634            }
635        }
636    }
637
638    return update_flags(state);
639
640    // software reset: 30.0 = 0x175C
641    // wait 2ms
642    // reset ports 0,1,2,3,4
643}
644
645/*
646  Uses only the VLAN port mask and the add tag mask to generate the other fields:
647  which ports are part of the same VLAN, removing vlan tags, and VLAN tag ids.
648 */
649static void correct_vlan_state(struct ip175c_state *state)
650{
651    int i, j;
652    state->num_vlans = 0;
653    for (i=0; i<MAX_VLANS; i++) {
654        if (state->vlan_ports[i] != 0) {
655            state->num_vlans = i+1; //hack -- we need to store the "set" vlans somewhere...
656        }
657    }
658
659
660
661    for (i=0; i<state->regs->NUM_PORTS; i++) {
662        unsigned int portmask = (1<<i);
663        if (!state->vlan_enabled) {
664            // share with everybody!
665            state->ports[i].shareports = (1<<state->regs->NUM_PORTS)-1;
666            continue;
667        }
668        state->ports[i].shareports = portmask;
669        for (j=0; j<MAX_VLANS; j++) {
670            if (state->vlan_ports[j] & portmask)
671                state->ports[i].shareports |= state->vlan_ports[j];
672        }
673    }
674    state->remove_tag = ((~state->add_tag) & ((1<<state->regs->NUM_PORTS)-1));
675}
676
677static int ip175c_get_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
678{
679    struct ip175c_state *state = dev->priv;
680    int err;
681
682    err = get_state(state); // may be set in get_state.
683    if (err < 0)
684        return err;
685    val->value.i = state->vlan_enabled;
686    return 0;
687}
688
689static int ip175c_set_enable_vlan(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
690{
691    struct ip175c_state *state = dev->priv;
692    int err;
693    int enable;
694    int i;
695
696    err = get_state(state);
697    if (err < 0)
698        return err;
699    enable = val->value.i;
700
701    if (state->vlan_enabled == enable) {
702        // do not change any state.
703        return 0;
704    }
705    state->vlan_enabled = enable;
706
707    // Otherwise, if we are switching state, set fields to a known default.
708    state->remove_tag = 0x0000;
709    state->add_tag = 0x0000;
710    for (i = 0; i < MAX_PORTS; i++)
711        state->ports[i].shareports = 0xffff;
712
713    for (i = 0; i < MAX_VLANS; i++)
714        state->vlan_ports[i] = 0x0;
715
716    if (state->vlan_enabled) {
717        // updates other fields only based off vlan_ports and add_tag fields.
718        // Note that by default, no ports are in any vlans.
719        correct_vlan_state(state);
720    }
721    // ensure sane defaults?
722    return update_state(state);
723}
724
725static int ip175c_get_ports(struct switch_dev *dev, struct switch_val *val)
726{
727    struct ip175c_state *state = dev->priv;
728    int err;
729    int b;
730    int ind;
731    unsigned int ports;
732
733    if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
734        return -EINVAL;
735
736    err = get_state(state);
737    if (err<0)
738        return err;
739
740    ports = state->vlan_ports[val->port_vlan];
741    b = 0;
742    ind = 0;
743    while (b < MAX_PORTS) {
744        if (ports&1) {
745            int istagged = ((state->add_tag >> b) & 1);
746            val->value.ports[ind].id = b;
747            val->value.ports[ind].flags = (istagged << SWITCH_PORT_FLAG_TAGGED);
748            ind++;
749        }
750        b++;
751        ports >>= 1;
752    }
753    val->len = ind;
754
755    return 0;
756}
757
758static int ip175c_set_ports(struct switch_dev *dev, struct switch_val *val)
759{
760    struct ip175c_state *state = dev->priv;
761    int i;
762    int err;
763
764    if (val->port_vlan >= dev->vlans || val->port_vlan < 0)
765        return -EINVAL;
766
767    err = get_state(state);
768    if (err < 0)
769        return err;
770
771    state->vlan_ports[val->port_vlan] = 0;
772    for (i = 0; i < val->len; i++) {
773        int bitmask = (1<<val->value.ports[i].id);
774        state->vlan_ports[val->port_vlan] |= bitmask;
775        if (val->value.ports[i].flags & (1<<SWITCH_PORT_FLAG_TAGGED)) {
776            state->add_tag |= bitmask;
777        } else {
778            state->add_tag &= (~bitmask);
779        }
780    }
781
782    correct_vlan_state(state);
783    err = update_state(state);
784
785    return err;
786}
787
788static int ip175c_apply(struct switch_dev *dev)
789{
790    struct ip175c_state *state = dev->priv;
791    int err;
792
793    err = get_flags(state);
794    if (err < 0)
795        return err;
796
797    if (REG_SUPP(state->regs->MII_REGISTER_EN)){
798        int val = getPhy(state, state->regs->MII_REGISTER_EN);
799        if (val < 0) {
800            return val;
801        }
802        val |= (1<<state->regs->MII_REGISTER_EN_BIT);
803        return setPhy(state, state->regs->MII_REGISTER_EN, val);
804    }
805    return 0;
806}
807
808static int ip175c_reset(struct switch_dev *dev)
809{
810    struct ip175c_state *state = dev->priv;
811    int i, err;
812
813    err = get_flags(state);
814    if (err < 0)
815        return err;
816
817    if (REG_SUPP(state->regs->RESET_REG)) {
818        err = setPhy(state, state->regs->RESET_REG, state->regs->RESET_VAL);
819        if (err < 0)
820            return err;
821        err = getPhy(state, state->regs->RESET_REG);
822
823        /* data sheet specifies reset period is 2 msec
824           (don't see any mention of the 2ms delay in the IP178C spec, only
825            in IP175C, but it can't hurt.) */
826        mdelay(2);
827    }
828
829    if (REG_SUPP(state->regs->MODE_REG)) {
830        err = setPhy(state, state->regs->MODE_REG, state->regs->RESET_VAL);
831        if (err < 0)
832            return err;
833        err = getPhy(state, state->regs->MODE_REG);
834    }
835
836    if (REG_SUPP(state->regs->RESET_REG)) {
837        /* reset external phy ports, except on IP175A */
838        for (i = 0; i < state->regs->NUM_PORTS-1; i++) {
839            err = state->mii_bus->write(state->mii_bus, i,
840                         MII_BMCR, BMCR_RESET);
841            if (err < 0)
842                return err;
843        }
844    }
845
846    return 0;
847}
848
849/*! get the current register number */
850static int ip175c_get_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
851{
852    struct ip175c_state *state = dev->priv;
853    int err;
854
855    err = get_state(state);
856    if (err < 0)
857        return err;
858
859    if (state->add_tag & (1<<val->port_vlan)) {
860        if (state->remove_tag & (1<<val->port_vlan))
861            val->value.i = 3; // shouldn't ever happen.
862        else
863            val->value.i = 1;
864    } else {
865        if (state->remove_tag & (1<<val->port_vlan))
866            val->value.i = 0;
867        else
868            val->value.i = 2;
869    }
870    return 0;
871}
872
873/*! set a new register address for low level access to registers */
874static int ip175c_set_tagged(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
875{
876    struct ip175c_state *state = dev->priv;
877    int err;
878
879    err = get_state(state);
880    if (err < 0)
881        return err;
882
883    state->add_tag &= ~(1<<val->port_vlan);
884    state->remove_tag &= ~(1<<val->port_vlan);
885
886    if (val->value.i == 0)
887        state->remove_tag |= (1<<val->port_vlan);
888    if (val->value.i == 1)
889        state->add_tag |= (1<<val->port_vlan);
890
891    SET_PORT_BITS(state, state->add_tag,
892                  state->regs->ADD_TAG_REG, state->regs->ADD_TAG_BIT);
893    SET_PORT_BITS(state, state->remove_tag,
894                  state->regs->REMOVE_TAG_REG, state->regs->REMOVE_TAG_BIT);
895
896    return err;
897}
898
899
900/* low level /proc procedures */
901
902/*! get the current phy address */
903static int ip175c_get_phy(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
904{
905    struct ip175c_state *state = dev->priv;
906
907    val->value.i = state->proc_mii.p;
908    return 0;
909}
910
911/*! set a new phy address for low level access to registers */
912static int ip175c_set_phy(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
913{
914    struct ip175c_state *state = dev->priv;
915    int new_reg = val->value.i;
916
917    if (new_reg < 0 || new_reg > 31)
918        state->proc_mii.p = (u16)-1;
919    else
920        state->proc_mii.p = (u16)new_reg;
921    return 0;
922}
923
924/*! get the current register number */
925static int ip175c_get_reg(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
926{
927    struct ip175c_state *state = dev->priv;
928
929    val->value.i = state->proc_mii.m;
930    return 0;
931}
932
933/*! set a new register address for low level access to registers */
934static int ip175c_set_reg(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
935{
936    struct ip175c_state *state = dev->priv;
937    int new_reg = val->value.i;
938
939    if (new_reg < 0 || new_reg > 31)
940        state->proc_mii.m = (u16)-1;
941    else
942        state->proc_mii.m = (u16)new_reg;
943    return 0;
944}
945
946/*! get the register content of state->proc_mii */
947static int ip175c_get_val(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
948{
949    struct ip175c_state *state = dev->priv;
950    int retval = -EINVAL;
951    if (REG_SUPP(state->proc_mii))
952        retval = getPhy(state, state->proc_mii);
953
954    if (retval < 0) {
955        return retval;
956    } else {
957        val->value.i = retval;
958        return 0;
959    }
960}
961
962/*! write a value to the register defined by phy/reg above */
963static int ip175c_set_val(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
964{
965    struct ip175c_state *state = dev->priv;
966    int myval, err = 0;
967
968    myval = val->value.i;
969    if (myval <= 0xffff && myval >= 0 && REG_SUPP(state->proc_mii)) {
970        err = setPhy(state, state->proc_mii, (u16)myval);
971    }
972    return err;
973}
974
975static int ip175c_read_name(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
976{
977    struct ip175c_state *state = dev->priv;
978    val->value.s = state->regs->NAME; // just a const pointer, won't be freed by swconfig.
979    return 0;
980}
981
982
983static int ip175c_set_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
984{
985    struct ip175c_state *state = dev->priv;
986    struct mii_bus *bus = state->mii_bus;
987    int nr = val->port_vlan;
988    int ctrl;
989    int autoneg;
990    int speed;
991    if (val->value.i == 100) {
992        speed = 1;
993        autoneg = 0;
994    } else if (val->value.i == 10) {
995        speed = 0;
996        autoneg = 0;
997    } else {
998        autoneg = 1;
999        speed = 1;
1000    }
1001
1002    /* can't set speed for cpu port */
1003    if (nr == state->regs->CPU_PORT)
1004        return -EINVAL;
1005
1006    if (nr >= dev->ports || nr < 0)
1007        return -EINVAL;
1008
1009    ctrl = ip_phy_read(bus, nr, 0);
1010    if (ctrl < 0)
1011        return -EIO;
1012
1013    ctrl &= (~(1<<12));
1014    ctrl &= (~(1<<13));
1015    ctrl |= (autoneg<<12);
1016    ctrl |= (speed<<13);
1017
1018    return ip_phy_write(bus, nr, 0, ctrl);
1019}
1020
1021static int ip175c_get_port_speed(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1022{
1023    struct ip175c_state *state = dev->priv;
1024    struct mii_bus *bus = state->mii_bus;
1025    int nr = val->port_vlan;
1026    int speed, status;
1027
1028    if (nr == state->regs->CPU_PORT) {
1029        val->value.i = 100;
1030        return 0;
1031    }
1032
1033    if (nr >= dev->ports || nr < 0)
1034        return -EINVAL;
1035
1036    status = ip_phy_read(bus, nr, 1);
1037    speed = ip_phy_read(bus, nr, 18);
1038    if (status < 0 || speed < 0)
1039        return -EIO;
1040
1041    if (status & 4)
1042        val->value.i = ((speed & (1<<11)) ? 100 : 10);
1043    else
1044        val->value.i = 0;
1045
1046    return 0;
1047}
1048
1049
1050static int ip175c_get_port_status(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val)
1051{
1052    struct ip175c_state *state = dev->priv;
1053    struct mii_bus *bus = state->mii_bus;
1054    int ctrl, speed, status;
1055    int nr = val->port_vlan;
1056    int len;
1057    char *buf = state->buf; // fixed-length at 80.
1058
1059    if (nr == state->regs->CPU_PORT) {
1060        sprintf(buf, "up, 100 Mbps, cpu port");
1061        val->value.s = buf;
1062        return 0;
1063    }
1064
1065    if (nr >= dev->ports || nr < 0)
1066        return -EINVAL;
1067
1068    ctrl = ip_phy_read(bus, nr, 0);
1069    status = ip_phy_read(bus, nr, 1);
1070    speed = ip_phy_read(bus, nr, 18);
1071    if (ctrl < 0 || status < 0 || speed < 0)
1072        return -EIO;
1073
1074    if (status & 4)
1075        len = sprintf(buf, "up, %d Mbps, %s duplex",
1076            ((speed & (1<<11)) ? 100 : 10),
1077            ((speed & (1<<10)) ? "full" : "half"));
1078    else
1079        len = sprintf(buf, "down");
1080
1081    if (ctrl & (1<<12)) {
1082        len += sprintf(buf+len, ", auto-negotiate");
1083        if (!(status & (1<<5)))
1084            len += sprintf(buf+len, " (in progress)");
1085    } else {
1086        len += sprintf(buf+len, ", fixed speed (%d)",
1087            ((ctrl & (1<<13)) ? 100 : 10));
1088    }
1089
1090    buf[len] = '\0';
1091    val->value.s = buf;
1092    return 0;
1093}
1094
1095static int ip175c_get_pvid(struct switch_dev *dev, int port, int *val)
1096{
1097    struct ip175c_state *state = dev->priv;
1098
1099    *val = state->ports[port].pvid;
1100    return 0;
1101}
1102
1103static int ip175c_set_pvid(struct switch_dev *dev, int port, int val)
1104{
1105    struct ip175c_state *state = dev->priv;
1106
1107    state->ports[port].pvid = val;
1108
1109    if (!REG_SUPP(state->regs->VLAN_DEFAULT_TAG_REG[port]))
1110        return 0;
1111
1112    return setPhy(state, state->regs->VLAN_DEFAULT_TAG_REG[port], val);
1113}
1114
1115
1116enum Ports {
1117    IP175C_PORT_STATUS,
1118    IP175C_PORT_LINK,
1119    IP175C_PORT_TAGGED,
1120    IP175C_PORT_PVID,
1121};
1122
1123enum Globals {
1124    IP175C_ENABLE_VLAN,
1125    IP175C_GET_NAME,
1126    IP175C_REGISTER_PHY,
1127    IP175C_REGISTER_MII,
1128    IP175C_REGISTER_VALUE,
1129    IP175C_REGISTER_ERRNO,
1130};
1131
1132static const struct switch_attr ip175c_global[] = {
1133    [IP175C_ENABLE_VLAN] = {
1134        .id = IP175C_ENABLE_VLAN,
1135        .type = SWITCH_TYPE_INT,
1136        .name = "enable_vlan",
1137        .description = "Flag to enable or disable VLANs and tagging",
1138        .get = ip175c_get_enable_vlan,
1139        .set = ip175c_set_enable_vlan,
1140    },
1141    [IP175C_GET_NAME] = {
1142        .id = IP175C_GET_NAME,
1143        .type = SWITCH_TYPE_STRING,
1144        .description = "Returns the type of IC+ chip.",
1145        .name = "name",
1146        .get = ip175c_read_name,
1147        .set = NULL,
1148    },
1149    /* jal: added for low level debugging etc. */
1150    [IP175C_REGISTER_PHY] = {
1151        .id = IP175C_REGISTER_PHY,
1152        .type = SWITCH_TYPE_INT,
1153        .description = "Direct register access: set phy (0-4, or 29,30,31)",
1154        .name = "phy",
1155        .get = ip175c_get_phy,
1156        .set = ip175c_set_phy,
1157    },
1158    [IP175C_REGISTER_MII] = {
1159        .id = IP175C_REGISTER_MII,
1160        .type = SWITCH_TYPE_INT,
1161        .description = "Direct register access: set mii number (0-31)",
1162        .name = "reg",
1163        .get = ip175c_get_reg,
1164        .set = ip175c_set_reg,
1165    },
1166    [IP175C_REGISTER_VALUE] = {
1167        .id = IP175C_REGISTER_VALUE,
1168        .type = SWITCH_TYPE_INT,
1169        .description = "Direct register access: read/write to register (0-65535)",
1170        .name = "val",
1171        .get = ip175c_get_val,
1172        .set = ip175c_set_val,
1173    },
1174};
1175
1176static const struct switch_attr ip175c_vlan[] = {
1177};
1178
1179static const struct switch_attr ip175c_port[] = {
1180    [IP175C_PORT_STATUS] = {
1181        .id = IP175C_PORT_STATUS,
1182        .type = SWITCH_TYPE_STRING,
1183        .description = "Returns Detailed port status",
1184        .name = "status",
1185        .get = ip175c_get_port_status,
1186        .set = NULL,
1187    },
1188    [IP175C_PORT_LINK] = {
1189        .id = IP175C_PORT_LINK,
1190        .type = SWITCH_TYPE_INT,
1191        .description = "Link speed. Can write 0 for auto-negotiate, or 10 or 100",
1192        .name = "link",
1193        .get = ip175c_get_port_speed,
1194        .set = ip175c_set_port_speed,
1195    },
1196    [IP175C_PORT_TAGGED] = {
1197        .id = IP175C_PORT_LINK,
1198        .type = SWITCH_TYPE_INT,
1199        .description = "0 = untag, 1 = add tags, 2 = do not alter (This value is reset if vlans are altered)",
1200        .name = "tagged",
1201        .get = ip175c_get_tagged,
1202        .set = ip175c_set_tagged,
1203    },
1204};
1205
1206static int ip175c_probe(struct phy_device *pdev)
1207{
1208    struct ip175c_state *state;
1209    struct switch_dev *dev;
1210    int err;
1211
1212    /* we only attach to PHY 0, but use all available PHYs */
1213    if (pdev->addr != 0)
1214        return -ENODEV;
1215
1216    state = kzalloc(sizeof(*state), GFP_KERNEL);
1217    if (!state)
1218        return -ENOMEM;
1219
1220    dev = &state->dev;
1221    dev->attr_global.attr = ip175c_global;
1222    dev->attr_global.n_attr = ARRAY_SIZE(ip175c_global);
1223    dev->attr_port.attr = ip175c_port;
1224    dev->attr_port.n_attr = ARRAY_SIZE(ip175c_port);
1225    dev->attr_vlan.attr = ip175c_vlan;
1226    dev->attr_vlan.n_attr = ARRAY_SIZE(ip175c_vlan);
1227
1228    dev->get_port_pvid = ip175c_get_pvid;
1229    dev->set_port_pvid = ip175c_set_pvid;
1230    dev->get_vlan_ports = ip175c_get_ports;
1231    dev->set_vlan_ports = ip175c_set_ports;
1232    dev->apply_config = ip175c_apply;
1233    dev->reset_switch = ip175c_reset;
1234
1235    dev->priv = state;
1236    pdev->priv = state;
1237    state->mii_bus = pdev->bus;
1238
1239    err = get_model(state);
1240    if (err < 0)
1241        goto error;
1242
1243    dev->vlans = MAX_VLANS;
1244    dev->cpu_port = state->regs->CPU_PORT;
1245    dev->ports = state->regs->NUM_PORTS;
1246    dev->name = state->regs->NAME;
1247
1248    return 0;
1249
1250error:
1251    kfree(state);
1252    return err;
1253}
1254
1255static int ip175c_config_init(struct phy_device *pdev)
1256{
1257    struct ip175c_state *state = pdev->priv;
1258    struct net_device *dev = pdev->attached_dev;
1259    int err;
1260
1261    pdev->irq = PHY_IGNORE_INTERRUPT;
1262    err = register_switch(&state->dev, dev);
1263    if (err < 0)
1264        return err;
1265
1266    ip175c_reset(&state->dev);
1267
1268    state->registered = true;
1269    netif_carrier_on(pdev->attached_dev);
1270
1271    return 0;
1272}
1273
1274static void ip175c_remove(struct phy_device *pdev)
1275{
1276    struct ip175c_state *state = pdev->priv;
1277
1278    if (state->registered)
1279        unregister_switch(&state->dev);
1280    kfree(state);
1281}
1282
1283static int ip175c_config_aneg(struct phy_device *pdev)
1284{
1285    return 0;
1286}
1287
1288static int ip175c_read_status(struct phy_device *pdev)
1289{
1290    pdev->speed = SPEED_100;
1291    pdev->duplex = DUPLEX_FULL;
1292    pdev->pause = pdev->asym_pause = 0;
1293    return 0;
1294}
1295
1296static struct phy_driver ip175c_driver = {
1297    .name = "IC+ IP175C",
1298    .phy_id = 0x02430d80,
1299    .phy_id_mask = 0x0ffffff0,
1300    .features = PHY_BASIC_FEATURES,
1301    .probe = ip175c_probe,
1302    .remove = ip175c_remove,
1303    .config_init = ip175c_config_init,
1304    .config_aneg = ip175c_config_aneg,
1305    .read_status = ip175c_read_status,
1306    .driver = { .owner = THIS_MODULE },
1307};
1308
1309static struct phy_driver ip175a_driver = {
1310    .name = "IC+ IP175A",
1311    .phy_id = 0x02430c50,
1312    .phy_id_mask = 0x0ffffff0,
1313    .features = PHY_BASIC_FEATURES,
1314    .probe = ip175c_probe,
1315    .remove = ip175c_remove,
1316    .config_init = ip175c_config_init,
1317    .config_aneg = ip175c_config_aneg,
1318    .read_status = ip175c_read_status,
1319    .driver = { .owner = THIS_MODULE },
1320};
1321
1322
1323int __init ip175c_init(void)
1324{
1325    int ret;
1326
1327    ret = phy_driver_register(&ip175a_driver);
1328    if (ret < 0)
1329        return ret;
1330
1331    return phy_driver_register(&ip175c_driver);
1332}
1333
1334void __exit ip175c_exit(void)
1335{
1336    phy_driver_unregister(&ip175c_driver);
1337    phy_driver_unregister(&ip175a_driver);
1338}
1339
1340MODULE_AUTHOR("Patrick Horn <patrick.horn@gmail.com>");
1341MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>");
1342MODULE_LICENSE("GPL");
1343
1344module_init(ip175c_init);
1345module_exit(ip175c_exit);
1346
1347

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