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Merge tag 'master-2014-11-25' of git://git.kernel.org/pub/scm/linux/kernel/git/linvil...
[deliverable/linux.git] / drivers / net / dsa / bcm_sf2.c
1 /*
2 * Broadcom Starfighter 2 DSA switch driver
3 *
4 * Copyright (C) 2014, Broadcom Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12 #include <linux/list.h>
13 #include <linux/module.h>
14 #include <linux/netdevice.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/of.h>
18 #include <linux/phy.h>
19 #include <linux/phy_fixed.h>
20 #include <linux/mii.h>
21 #include <linux/of.h>
22 #include <linux/of_irq.h>
23 #include <linux/of_address.h>
24 #include <net/dsa.h>
25 #include <linux/ethtool.h>
26
27 #include "bcm_sf2.h"
28 #include "bcm_sf2_regs.h"
29
30 /* String, offset, and register size in bytes if different from 4 bytes */
31 static const struct bcm_sf2_hw_stats bcm_sf2_mib[] = {
32 { "TxOctets", 0x000, 8 },
33 { "TxDropPkts", 0x020 },
34 { "TxQPKTQ0", 0x030 },
35 { "TxBroadcastPkts", 0x040 },
36 { "TxMulticastPkts", 0x050 },
37 { "TxUnicastPKts", 0x060 },
38 { "TxCollisions", 0x070 },
39 { "TxSingleCollision", 0x080 },
40 { "TxMultipleCollision", 0x090 },
41 { "TxDeferredCollision", 0x0a0 },
42 { "TxLateCollision", 0x0b0 },
43 { "TxExcessiveCollision", 0x0c0 },
44 { "TxFrameInDisc", 0x0d0 },
45 { "TxPausePkts", 0x0e0 },
46 { "TxQPKTQ1", 0x0f0 },
47 { "TxQPKTQ2", 0x100 },
48 { "TxQPKTQ3", 0x110 },
49 { "TxQPKTQ4", 0x120 },
50 { "TxQPKTQ5", 0x130 },
51 { "RxOctets", 0x140, 8 },
52 { "RxUndersizePkts", 0x160 },
53 { "RxPausePkts", 0x170 },
54 { "RxPkts64Octets", 0x180 },
55 { "RxPkts65to127Octets", 0x190 },
56 { "RxPkts128to255Octets", 0x1a0 },
57 { "RxPkts256to511Octets", 0x1b0 },
58 { "RxPkts512to1023Octets", 0x1c0 },
59 { "RxPkts1024toMaxPktsOctets", 0x1d0 },
60 { "RxOversizePkts", 0x1e0 },
61 { "RxJabbers", 0x1f0 },
62 { "RxAlignmentErrors", 0x200 },
63 { "RxFCSErrors", 0x210 },
64 { "RxGoodOctets", 0x220, 8 },
65 { "RxDropPkts", 0x240 },
66 { "RxUnicastPkts", 0x250 },
67 { "RxMulticastPkts", 0x260 },
68 { "RxBroadcastPkts", 0x270 },
69 { "RxSAChanges", 0x280 },
70 { "RxFragments", 0x290 },
71 { "RxJumboPkt", 0x2a0 },
72 { "RxSymblErr", 0x2b0 },
73 { "InRangeErrCount", 0x2c0 },
74 { "OutRangeErrCount", 0x2d0 },
75 { "EEELpiEvent", 0x2e0 },
76 { "EEELpiDuration", 0x2f0 },
77 { "RxDiscard", 0x300, 8 },
78 { "TxQPKTQ6", 0x320 },
79 { "TxQPKTQ7", 0x330 },
80 { "TxPkts64Octets", 0x340 },
81 { "TxPkts65to127Octets", 0x350 },
82 { "TxPkts128to255Octets", 0x360 },
83 { "TxPkts256to511Ocets", 0x370 },
84 { "TxPkts512to1023Ocets", 0x380 },
85 { "TxPkts1024toMaxPktOcets", 0x390 },
86 };
87
88 #define BCM_SF2_STATS_SIZE ARRAY_SIZE(bcm_sf2_mib)
89
90 static void bcm_sf2_sw_get_strings(struct dsa_switch *ds,
91 int port, uint8_t *data)
92 {
93 unsigned int i;
94
95 for (i = 0; i < BCM_SF2_STATS_SIZE; i++)
96 memcpy(data + i * ETH_GSTRING_LEN,
97 bcm_sf2_mib[i].string, ETH_GSTRING_LEN);
98 }
99
100 static void bcm_sf2_sw_get_ethtool_stats(struct dsa_switch *ds,
101 int port, uint64_t *data)
102 {
103 struct bcm_sf2_priv *priv = ds_to_priv(ds);
104 const struct bcm_sf2_hw_stats *s;
105 unsigned int i;
106 u64 val = 0;
107 u32 offset;
108
109 mutex_lock(&priv->stats_mutex);
110
111 /* Now fetch the per-port counters */
112 for (i = 0; i < BCM_SF2_STATS_SIZE; i++) {
113 s = &bcm_sf2_mib[i];
114
115 /* Do a latched 64-bit read if needed */
116 offset = s->reg + CORE_P_MIB_OFFSET(port);
117 if (s->sizeof_stat == 8)
118 val = core_readq(priv, offset);
119 else
120 val = core_readl(priv, offset);
121
122 data[i] = (u64)val;
123 }
124
125 mutex_unlock(&priv->stats_mutex);
126 }
127
128 static int bcm_sf2_sw_get_sset_count(struct dsa_switch *ds)
129 {
130 return BCM_SF2_STATS_SIZE;
131 }
132
133 static char *bcm_sf2_sw_probe(struct device *host_dev, int sw_addr)
134 {
135 return "Broadcom Starfighter 2";
136 }
137
138 static void bcm_sf2_imp_vlan_setup(struct dsa_switch *ds, int cpu_port)
139 {
140 struct bcm_sf2_priv *priv = ds_to_priv(ds);
141 unsigned int i;
142 u32 reg;
143
144 /* Enable the IMP Port to be in the same VLAN as the other ports
145 * on a per-port basis such that we only have Port i and IMP in
146 * the same VLAN.
147 */
148 for (i = 0; i < priv->hw_params.num_ports; i++) {
149 if (!((1 << i) & ds->phys_port_mask))
150 continue;
151
152 reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(i));
153 reg |= (1 << cpu_port);
154 core_writel(priv, reg, CORE_PORT_VLAN_CTL_PORT(i));
155 }
156 }
157
158 static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
159 {
160 struct bcm_sf2_priv *priv = ds_to_priv(ds);
161 u32 reg, val;
162
163 /* Enable the port memories */
164 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
165 reg &= ~P_TXQ_PSM_VDD(port);
166 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
167
168 /* Enable Broadcast, Multicast, Unicast forwarding to IMP port */
169 reg = core_readl(priv, CORE_IMP_CTL);
170 reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN);
171 reg &= ~(RX_DIS | TX_DIS);
172 core_writel(priv, reg, CORE_IMP_CTL);
173
174 /* Enable forwarding */
175 core_writel(priv, SW_FWDG_EN, CORE_SWMODE);
176
177 /* Enable IMP port in dumb mode */
178 reg = core_readl(priv, CORE_SWITCH_CTRL);
179 reg |= MII_DUMB_FWDG_EN;
180 core_writel(priv, reg, CORE_SWITCH_CTRL);
181
182 /* Resolve which bit controls the Broadcom tag */
183 switch (port) {
184 case 8:
185 val = BRCM_HDR_EN_P8;
186 break;
187 case 7:
188 val = BRCM_HDR_EN_P7;
189 break;
190 case 5:
191 val = BRCM_HDR_EN_P5;
192 break;
193 default:
194 val = 0;
195 break;
196 }
197
198 /* Enable Broadcom tags for IMP port */
199 reg = core_readl(priv, CORE_BRCM_HDR_CTRL);
200 reg |= val;
201 core_writel(priv, reg, CORE_BRCM_HDR_CTRL);
202
203 /* Enable reception Broadcom tag for CPU TX (switch RX) to
204 * allow us to tag outgoing frames
205 */
206 reg = core_readl(priv, CORE_BRCM_HDR_RX_DIS);
207 reg &= ~(1 << port);
208 core_writel(priv, reg, CORE_BRCM_HDR_RX_DIS);
209
210 /* Enable transmission of Broadcom tags from the switch (CPU RX) to
211 * allow delivering frames to the per-port net_devices
212 */
213 reg = core_readl(priv, CORE_BRCM_HDR_TX_DIS);
214 reg &= ~(1 << port);
215 core_writel(priv, reg, CORE_BRCM_HDR_TX_DIS);
216
217 /* Force link status for IMP port */
218 reg = core_readl(priv, CORE_STS_OVERRIDE_IMP);
219 reg |= (MII_SW_OR | LINK_STS);
220 core_writel(priv, reg, CORE_STS_OVERRIDE_IMP);
221 }
222
223 static void bcm_sf2_eee_enable_set(struct dsa_switch *ds, int port, bool enable)
224 {
225 struct bcm_sf2_priv *priv = ds_to_priv(ds);
226 u32 reg;
227
228 reg = core_readl(priv, CORE_EEE_EN_CTRL);
229 if (enable)
230 reg |= 1 << port;
231 else
232 reg &= ~(1 << port);
233 core_writel(priv, reg, CORE_EEE_EN_CTRL);
234 }
235
236 static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
237 struct phy_device *phy)
238 {
239 struct bcm_sf2_priv *priv = ds_to_priv(ds);
240 s8 cpu_port = ds->dst[ds->index].cpu_port;
241 u32 reg;
242
243 /* Clear the memory power down */
244 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
245 reg &= ~P_TXQ_PSM_VDD(port);
246 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
247
248 /* Clear the Rx and Tx disable bits and set to no spanning tree */
249 core_writel(priv, 0, CORE_G_PCTL_PORT(port));
250
251 /* Enable port 7 interrupts to get notified */
252 if (port == 7)
253 intrl2_1_mask_clear(priv, P_IRQ_MASK(P7_IRQ_OFF));
254
255 /* Set this port, and only this one to be in the default VLAN */
256 reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(port));
257 reg &= ~PORT_VLAN_CTRL_MASK;
258 reg |= (1 << port);
259 core_writel(priv, reg, CORE_PORT_VLAN_CTL_PORT(port));
260
261 bcm_sf2_imp_vlan_setup(ds, cpu_port);
262
263 /* If EEE was enabled, restore it */
264 if (priv->port_sts[port].eee.eee_enabled)
265 bcm_sf2_eee_enable_set(ds, port, true);
266
267 return 0;
268 }
269
270 static void bcm_sf2_port_disable(struct dsa_switch *ds, int port,
271 struct phy_device *phy)
272 {
273 struct bcm_sf2_priv *priv = ds_to_priv(ds);
274 u32 off, reg;
275
276 if (priv->wol_ports_mask & (1 << port))
277 return;
278
279 if (port == 7) {
280 intrl2_1_mask_set(priv, P_IRQ_MASK(P7_IRQ_OFF));
281 intrl2_1_writel(priv, P_IRQ_MASK(P7_IRQ_OFF), INTRL2_CPU_CLEAR);
282 }
283
284 if (dsa_is_cpu_port(ds, port))
285 off = CORE_IMP_CTL;
286 else
287 off = CORE_G_PCTL_PORT(port);
288
289 reg = core_readl(priv, off);
290 reg |= RX_DIS | TX_DIS;
291 core_writel(priv, reg, off);
292
293 /* Power down the port memory */
294 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
295 reg |= P_TXQ_PSM_VDD(port);
296 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
297 }
298
299 /* Returns 0 if EEE was not enabled, or 1 otherwise
300 */
301 static int bcm_sf2_eee_init(struct dsa_switch *ds, int port,
302 struct phy_device *phy)
303 {
304 struct bcm_sf2_priv *priv = ds_to_priv(ds);
305 struct ethtool_eee *p = &priv->port_sts[port].eee;
306 int ret;
307
308 p->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_100baseT_Full);
309
310 ret = phy_init_eee(phy, 0);
311 if (ret)
312 return 0;
313
314 bcm_sf2_eee_enable_set(ds, port, true);
315
316 return 1;
317 }
318
319 static int bcm_sf2_sw_get_eee(struct dsa_switch *ds, int port,
320 struct ethtool_eee *e)
321 {
322 struct bcm_sf2_priv *priv = ds_to_priv(ds);
323 struct ethtool_eee *p = &priv->port_sts[port].eee;
324 u32 reg;
325
326 reg = core_readl(priv, CORE_EEE_LPI_INDICATE);
327 e->eee_enabled = p->eee_enabled;
328 e->eee_active = !!(reg & (1 << port));
329
330 return 0;
331 }
332
333 static int bcm_sf2_sw_set_eee(struct dsa_switch *ds, int port,
334 struct phy_device *phydev,
335 struct ethtool_eee *e)
336 {
337 struct bcm_sf2_priv *priv = ds_to_priv(ds);
338 struct ethtool_eee *p = &priv->port_sts[port].eee;
339
340 p->eee_enabled = e->eee_enabled;
341
342 if (!p->eee_enabled) {
343 bcm_sf2_eee_enable_set(ds, port, false);
344 } else {
345 p->eee_enabled = bcm_sf2_eee_init(ds, port, phydev);
346 if (!p->eee_enabled)
347 return -EOPNOTSUPP;
348 }
349
350 return 0;
351 }
352
353 static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id)
354 {
355 struct bcm_sf2_priv *priv = dev_id;
356
357 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
358 ~priv->irq0_mask;
359 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
360
361 return IRQ_HANDLED;
362 }
363
364 static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id)
365 {
366 struct bcm_sf2_priv *priv = dev_id;
367
368 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
369 ~priv->irq1_mask;
370 intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR);
371
372 if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF))
373 priv->port_sts[7].link = 1;
374 if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF))
375 priv->port_sts[7].link = 0;
376
377 return IRQ_HANDLED;
378 }
379
380 static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv)
381 {
382 unsigned int timeout = 1000;
383 u32 reg;
384
385 reg = core_readl(priv, CORE_WATCHDOG_CTRL);
386 reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET;
387 core_writel(priv, reg, CORE_WATCHDOG_CTRL);
388
389 do {
390 reg = core_readl(priv, CORE_WATCHDOG_CTRL);
391 if (!(reg & SOFTWARE_RESET))
392 break;
393
394 usleep_range(1000, 2000);
395 } while (timeout-- > 0);
396
397 if (timeout == 0)
398 return -ETIMEDOUT;
399
400 return 0;
401 }
402
403 static int bcm_sf2_sw_setup(struct dsa_switch *ds)
404 {
405 const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME;
406 struct bcm_sf2_priv *priv = ds_to_priv(ds);
407 struct device_node *dn;
408 void __iomem **base;
409 unsigned int port;
410 unsigned int i;
411 u32 reg, rev;
412 int ret;
413
414 spin_lock_init(&priv->indir_lock);
415 mutex_init(&priv->stats_mutex);
416
417 /* All the interesting properties are at the parent device_node
418 * level
419 */
420 dn = ds->pd->of_node->parent;
421
422 priv->irq0 = irq_of_parse_and_map(dn, 0);
423 priv->irq1 = irq_of_parse_and_map(dn, 1);
424
425 base = &priv->core;
426 for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
427 *base = of_iomap(dn, i);
428 if (*base == NULL) {
429 pr_err("unable to find register: %s\n", reg_names[i]);
430 ret = -ENOMEM;
431 goto out_unmap;
432 }
433 base++;
434 }
435
436 ret = bcm_sf2_sw_rst(priv);
437 if (ret) {
438 pr_err("unable to software reset switch: %d\n", ret);
439 goto out_unmap;
440 }
441
442 /* Disable all interrupts and request them */
443 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
444 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
445 intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
446 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
447 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
448 intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
449
450 ret = request_irq(priv->irq0, bcm_sf2_switch_0_isr, 0,
451 "switch_0", priv);
452 if (ret < 0) {
453 pr_err("failed to request switch_0 IRQ\n");
454 goto out_unmap;
455 }
456
457 ret = request_irq(priv->irq1, bcm_sf2_switch_1_isr, 0,
458 "switch_1", priv);
459 if (ret < 0) {
460 pr_err("failed to request switch_1 IRQ\n");
461 goto out_free_irq0;
462 }
463
464 /* Reset the MIB counters */
465 reg = core_readl(priv, CORE_GMNCFGCFG);
466 reg |= RST_MIB_CNT;
467 core_writel(priv, reg, CORE_GMNCFGCFG);
468 reg &= ~RST_MIB_CNT;
469 core_writel(priv, reg, CORE_GMNCFGCFG);
470
471 /* Get the maximum number of ports for this switch */
472 priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1;
473 if (priv->hw_params.num_ports > DSA_MAX_PORTS)
474 priv->hw_params.num_ports = DSA_MAX_PORTS;
475
476 /* Assume a single GPHY setup if we can't read that property */
477 if (of_property_read_u32(dn, "brcm,num-gphy",
478 &priv->hw_params.num_gphy))
479 priv->hw_params.num_gphy = 1;
480
481 /* Enable all valid ports and disable those unused */
482 for (port = 0; port < priv->hw_params.num_ports; port++) {
483 /* IMP port receives special treatment */
484 if ((1 << port) & ds->phys_port_mask)
485 bcm_sf2_port_setup(ds, port, NULL);
486 else if (dsa_is_cpu_port(ds, port))
487 bcm_sf2_imp_setup(ds, port);
488 else
489 bcm_sf2_port_disable(ds, port, NULL);
490 }
491
492 /* Include the pseudo-PHY address and the broadcast PHY address to
493 * divert reads towards our workaround
494 */
495 ds->phys_mii_mask |= ((1 << 30) | (1 << 0));
496
497 rev = reg_readl(priv, REG_SWITCH_REVISION);
498 priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) &
499 SWITCH_TOP_REV_MASK;
500 priv->hw_params.core_rev = (rev & SF2_REV_MASK);
501
502 rev = reg_readl(priv, REG_PHY_REVISION);
503 priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK;
504
505 pr_info("Starfighter 2 top: %x.%02x, core: %x.%02x base: 0x%p, IRQs: %d, %d\n",
506 priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff,
507 priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff,
508 priv->core, priv->irq0, priv->irq1);
509
510 return 0;
511
512 out_free_irq0:
513 free_irq(priv->irq0, priv);
514 out_unmap:
515 base = &priv->core;
516 for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
517 if (*base)
518 iounmap(*base);
519 base++;
520 }
521 return ret;
522 }
523
524 static int bcm_sf2_sw_set_addr(struct dsa_switch *ds, u8 *addr)
525 {
526 return 0;
527 }
528
529 static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port)
530 {
531 struct bcm_sf2_priv *priv = ds_to_priv(ds);
532
533 /* The BCM7xxx PHY driver expects to find the integrated PHY revision
534 * in bits 15:8 and the patch level in bits 7:0 which is exactly what
535 * the REG_PHY_REVISION register layout is.
536 */
537
538 return priv->hw_params.gphy_rev;
539 }
540
541 static int bcm_sf2_sw_indir_rw(struct dsa_switch *ds, int op, int addr,
542 int regnum, u16 val)
543 {
544 struct bcm_sf2_priv *priv = ds_to_priv(ds);
545 int ret = 0;
546 u32 reg;
547
548 reg = reg_readl(priv, REG_SWITCH_CNTRL);
549 reg |= MDIO_MASTER_SEL;
550 reg_writel(priv, reg, REG_SWITCH_CNTRL);
551
552 /* Page << 8 | offset */
553 reg = 0x70;
554 reg <<= 2;
555 core_writel(priv, addr, reg);
556
557 /* Page << 8 | offset */
558 reg = 0x80 << 8 | regnum << 1;
559 reg <<= 2;
560
561 if (op)
562 ret = core_readl(priv, reg);
563 else
564 core_writel(priv, val, reg);
565
566 reg = reg_readl(priv, REG_SWITCH_CNTRL);
567 reg &= ~MDIO_MASTER_SEL;
568 reg_writel(priv, reg, REG_SWITCH_CNTRL);
569
570 return ret & 0xffff;
571 }
572
573 static int bcm_sf2_sw_phy_read(struct dsa_switch *ds, int addr, int regnum)
574 {
575 /* Intercept reads from the MDIO broadcast address or Broadcom
576 * pseudo-PHY address
577 */
578 switch (addr) {
579 case 0:
580 case 30:
581 return bcm_sf2_sw_indir_rw(ds, 1, addr, regnum, 0);
582 default:
583 return 0xffff;
584 }
585 }
586
587 static int bcm_sf2_sw_phy_write(struct dsa_switch *ds, int addr, int regnum,
588 u16 val)
589 {
590 /* Intercept writes to the MDIO broadcast address or Broadcom
591 * pseudo-PHY address
592 */
593 switch (addr) {
594 case 0:
595 case 30:
596 bcm_sf2_sw_indir_rw(ds, 0, addr, regnum, val);
597 break;
598 }
599
600 return 0;
601 }
602
603 static void bcm_sf2_sw_adjust_link(struct dsa_switch *ds, int port,
604 struct phy_device *phydev)
605 {
606 struct bcm_sf2_priv *priv = ds_to_priv(ds);
607 u32 id_mode_dis = 0, port_mode;
608 const char *str = NULL;
609 u32 reg;
610
611 switch (phydev->interface) {
612 case PHY_INTERFACE_MODE_RGMII:
613 str = "RGMII (no delay)";
614 id_mode_dis = 1;
615 case PHY_INTERFACE_MODE_RGMII_TXID:
616 if (!str)
617 str = "RGMII (TX delay)";
618 port_mode = EXT_GPHY;
619 break;
620 case PHY_INTERFACE_MODE_MII:
621 str = "MII";
622 port_mode = EXT_EPHY;
623 break;
624 case PHY_INTERFACE_MODE_REVMII:
625 str = "Reverse MII";
626 port_mode = EXT_REVMII;
627 break;
628 default:
629 /* All other PHYs: internal and MoCA */
630 goto force_link;
631 }
632
633 /* If the link is down, just disable the interface to conserve power */
634 if (!phydev->link) {
635 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
636 reg &= ~RGMII_MODE_EN;
637 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
638 goto force_link;
639 }
640
641 /* Clear id_mode_dis bit, and the existing port mode, but
642 * make sure we enable the RGMII block for data to pass
643 */
644 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
645 reg &= ~ID_MODE_DIS;
646 reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT);
647 reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
648
649 reg |= port_mode | RGMII_MODE_EN;
650 if (id_mode_dis)
651 reg |= ID_MODE_DIS;
652
653 if (phydev->pause) {
654 if (phydev->asym_pause)
655 reg |= TX_PAUSE_EN;
656 reg |= RX_PAUSE_EN;
657 }
658
659 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
660
661 pr_info("Port %d configured for %s\n", port, str);
662
663 force_link:
664 /* Force link settings detected from the PHY */
665 reg = SW_OVERRIDE;
666 switch (phydev->speed) {
667 case SPEED_1000:
668 reg |= SPDSTS_1000 << SPEED_SHIFT;
669 break;
670 case SPEED_100:
671 reg |= SPDSTS_100 << SPEED_SHIFT;
672 break;
673 }
674
675 if (phydev->link)
676 reg |= LINK_STS;
677 if (phydev->duplex == DUPLEX_FULL)
678 reg |= DUPLX_MODE;
679
680 core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(port));
681 }
682
683 static void bcm_sf2_sw_fixed_link_update(struct dsa_switch *ds, int port,
684 struct fixed_phy_status *status)
685 {
686 struct bcm_sf2_priv *priv = ds_to_priv(ds);
687 u32 link, duplex, pause, speed;
688 u32 reg;
689
690 link = core_readl(priv, CORE_LNKSTS);
691 duplex = core_readl(priv, CORE_DUPSTS);
692 pause = core_readl(priv, CORE_PAUSESTS);
693 speed = core_readl(priv, CORE_SPDSTS);
694
695 speed >>= (port * SPDSTS_SHIFT);
696 speed &= SPDSTS_MASK;
697
698 status->link = 0;
699
700 /* Port 7 is special as we do not get link status from CORE_LNKSTS,
701 * which means that we need to force the link at the port override
702 * level to get the data to flow. We do use what the interrupt handler
703 * did determine before.
704 */
705 if (port == 7) {
706 status->link = priv->port_sts[port].link;
707 reg = core_readl(priv, CORE_STS_OVERRIDE_GMIIP_PORT(7));
708 reg |= SW_OVERRIDE;
709 if (status->link)
710 reg |= LINK_STS;
711 else
712 reg &= ~LINK_STS;
713 core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(7));
714 status->duplex = 1;
715 } else {
716 status->link = !!(link & (1 << port));
717 status->duplex = !!(duplex & (1 << port));
718 }
719
720 switch (speed) {
721 case SPDSTS_10:
722 status->speed = SPEED_10;
723 break;
724 case SPDSTS_100:
725 status->speed = SPEED_100;
726 break;
727 case SPDSTS_1000:
728 status->speed = SPEED_1000;
729 break;
730 }
731
732 if ((pause & (1 << port)) &&
733 (pause & (1 << (port + PAUSESTS_TX_PAUSE_SHIFT)))) {
734 status->asym_pause = 1;
735 status->pause = 1;
736 }
737
738 if (pause & (1 << port))
739 status->pause = 1;
740 }
741
742 static int bcm_sf2_sw_suspend(struct dsa_switch *ds)
743 {
744 struct bcm_sf2_priv *priv = ds_to_priv(ds);
745 unsigned int port;
746
747 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
748 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
749 intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
750 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
751 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
752 intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
753
754 /* Disable all ports physically present including the IMP
755 * port, the other ones have already been disabled during
756 * bcm_sf2_sw_setup
757 */
758 for (port = 0; port < DSA_MAX_PORTS; port++) {
759 if ((1 << port) & ds->phys_port_mask ||
760 dsa_is_cpu_port(ds, port))
761 bcm_sf2_port_disable(ds, port, NULL);
762 }
763
764 return 0;
765 }
766
767 static int bcm_sf2_sw_resume(struct dsa_switch *ds)
768 {
769 struct bcm_sf2_priv *priv = ds_to_priv(ds);
770 unsigned int port;
771 u32 reg;
772 int ret;
773
774 ret = bcm_sf2_sw_rst(priv);
775 if (ret) {
776 pr_err("%s: failed to software reset switch\n", __func__);
777 return ret;
778 }
779
780 /* Reinitialize the single GPHY */
781 if (priv->hw_params.num_gphy == 1) {
782 reg = reg_readl(priv, REG_SPHY_CNTRL);
783 reg |= PHY_RESET;
784 reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS);
785 reg_writel(priv, reg, REG_SPHY_CNTRL);
786 udelay(21);
787 reg = reg_readl(priv, REG_SPHY_CNTRL);
788 reg &= ~PHY_RESET;
789 reg_writel(priv, reg, REG_SPHY_CNTRL);
790 }
791
792 for (port = 0; port < DSA_MAX_PORTS; port++) {
793 if ((1 << port) & ds->phys_port_mask)
794 bcm_sf2_port_setup(ds, port, NULL);
795 else if (dsa_is_cpu_port(ds, port))
796 bcm_sf2_imp_setup(ds, port);
797 }
798
799 return 0;
800 }
801
802 static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port,
803 struct ethtool_wolinfo *wol)
804 {
805 struct net_device *p = ds->dst[ds->index].master_netdev;
806 struct bcm_sf2_priv *priv = ds_to_priv(ds);
807 struct ethtool_wolinfo pwol;
808
809 /* Get the parent device WoL settings */
810 p->ethtool_ops->get_wol(p, &pwol);
811
812 /* Advertise the parent device supported settings */
813 wol->supported = pwol.supported;
814 memset(&wol->sopass, 0, sizeof(wol->sopass));
815
816 if (pwol.wolopts & WAKE_MAGICSECURE)
817 memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass));
818
819 if (priv->wol_ports_mask & (1 << port))
820 wol->wolopts = pwol.wolopts;
821 else
822 wol->wolopts = 0;
823 }
824
825 static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port,
826 struct ethtool_wolinfo *wol)
827 {
828 struct net_device *p = ds->dst[ds->index].master_netdev;
829 struct bcm_sf2_priv *priv = ds_to_priv(ds);
830 s8 cpu_port = ds->dst[ds->index].cpu_port;
831 struct ethtool_wolinfo pwol;
832
833 p->ethtool_ops->get_wol(p, &pwol);
834 if (wol->wolopts & ~pwol.supported)
835 return -EINVAL;
836
837 if (wol->wolopts)
838 priv->wol_ports_mask |= (1 << port);
839 else
840 priv->wol_ports_mask &= ~(1 << port);
841
842 /* If we have at least one port enabled, make sure the CPU port
843 * is also enabled. If the CPU port is the last one enabled, we disable
844 * it since this configuration does not make sense.
845 */
846 if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port))
847 priv->wol_ports_mask |= (1 << cpu_port);
848 else
849 priv->wol_ports_mask &= ~(1 << cpu_port);
850
851 return p->ethtool_ops->set_wol(p, wol);
852 }
853
854 static struct dsa_switch_driver bcm_sf2_switch_driver = {
855 .tag_protocol = DSA_TAG_PROTO_BRCM,
856 .priv_size = sizeof(struct bcm_sf2_priv),
857 .probe = bcm_sf2_sw_probe,
858 .setup = bcm_sf2_sw_setup,
859 .set_addr = bcm_sf2_sw_set_addr,
860 .get_phy_flags = bcm_sf2_sw_get_phy_flags,
861 .phy_read = bcm_sf2_sw_phy_read,
862 .phy_write = bcm_sf2_sw_phy_write,
863 .get_strings = bcm_sf2_sw_get_strings,
864 .get_ethtool_stats = bcm_sf2_sw_get_ethtool_stats,
865 .get_sset_count = bcm_sf2_sw_get_sset_count,
866 .adjust_link = bcm_sf2_sw_adjust_link,
867 .fixed_link_update = bcm_sf2_sw_fixed_link_update,
868 .suspend = bcm_sf2_sw_suspend,
869 .resume = bcm_sf2_sw_resume,
870 .get_wol = bcm_sf2_sw_get_wol,
871 .set_wol = bcm_sf2_sw_set_wol,
872 .port_enable = bcm_sf2_port_setup,
873 .port_disable = bcm_sf2_port_disable,
874 .get_eee = bcm_sf2_sw_get_eee,
875 .set_eee = bcm_sf2_sw_set_eee,
876 };
877
878 static int __init bcm_sf2_init(void)
879 {
880 register_switch_driver(&bcm_sf2_switch_driver);
881
882 return 0;
883 }
884 module_init(bcm_sf2_init);
885
886 static void __exit bcm_sf2_exit(void)
887 {
888 unregister_switch_driver(&bcm_sf2_switch_driver);
889 }
890 module_exit(bcm_sf2_exit);
891
892 MODULE_AUTHOR("Broadcom Corporation");
893 MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip");
894 MODULE_LICENSE("GPL");
895 MODULE_ALIAS("platform:brcm-sf2");
Linux kernel - Deliverables
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