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Merge tag 'nfc-next-3.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo...
[deliverable/linux.git] / drivers / net / dsa / bcm_sf2.c
CommitLineData
246d7f77
FF		 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>
96e65d7f 25#include <linux/ethtool.h>
246d7f77
FF		 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 */
31static 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
90static 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
100static 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
128static int bcm_sf2_sw_get_sset_count(struct dsa_switch *ds)
129{
130 return BCM_SF2_STATS_SIZE;
131}
132
b4d2394d 133static char *bcm_sf2_sw_probe(struct device *host_dev, int sw_addr)
246d7f77
FF		 134{
135 return "Broadcom Starfighter 2";
136}
137
b6d045db 138static void bcm_sf2_imp_vlan_setup(struct dsa_switch *ds, int cpu_port)
246d7f77
FF		 139{
140 struct bcm_sf2_priv *priv = ds_to_priv(ds);
141 unsigned int i;
b6d045db
FF		 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
158static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
159{
160 struct bcm_sf2_priv *priv = ds_to_priv(ds);
246d7f77
FF		 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);
246d7f77
FF		 221}
222
450b05c1
FF		 223static 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
b6d045db
FF		 236static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
237 struct phy_device *phy)
246d7f77
FF		 238{
239 struct bcm_sf2_priv *priv = ds_to_priv(ds);
b6d045db 240 s8 cpu_port = ds->dst[ds->index].cpu_port;
246d7f77
FF		 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));
b6d045db
FF		 260
261 bcm_sf2_imp_vlan_setup(ds, cpu_port);
262
450b05c1
FF		 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
b6d045db 267 return 0;
246d7f77
FF		 268}
269
b6d045db
FF		 270static void bcm_sf2_port_disable(struct dsa_switch *ds, int port,
271 struct phy_device *phy)
246d7f77
FF		 272{
273 struct bcm_sf2_priv *priv = ds_to_priv(ds);
274 u32 off, reg;
275
96e65d7f
FF		 276 if (priv->wol_ports_mask & (1 << port))
277 return;
278
b6d045db
FF		 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
246d7f77
FF		 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
450b05c1
FF		 299/* Returns 0 if EEE was not enabled, or 1 otherwise
300 */
301static 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
319static 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
333static 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
246d7f77
FF		 353static 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
364static 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
33f84614
FF		 380static 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
691c9a8f
FF		 403static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv)
404{
405 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
406 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
407 intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
408 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_MASK_SET);
409 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
410 intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
411}
412
246d7f77
FF		 413static int bcm_sf2_sw_setup(struct dsa_switch *ds)
414{
415 const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME;
416 struct bcm_sf2_priv *priv = ds_to_priv(ds);
417 struct device_node *dn;
418 void __iomem **base;
419 unsigned int port;
420 unsigned int i;
421 u32 reg, rev;
422 int ret;
423
424 spin_lock_init(&priv->indir_lock);
425 mutex_init(&priv->stats_mutex);
426
427 /* All the interesting properties are at the parent device_node
428 * level
429 */
430 dn = ds->pd->of_node->parent;
431
432 priv->irq0 = irq_of_parse_and_map(dn, 0);
433 priv->irq1 = irq_of_parse_and_map(dn, 1);
434
435 base = &priv->core;
436 for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
437 *base = of_iomap(dn, i);
438 if (*base == NULL) {
439 pr_err("unable to find register: %s\n", reg_names[i]);
a566059d
FF		 440 ret = -ENOMEM;
441 goto out_unmap;
246d7f77
FF		 442 }
443 base++;
444 }
445
33f84614
FF		 446 ret = bcm_sf2_sw_rst(priv);
447 if (ret) {
448 pr_err("unable to software reset switch: %d\n", ret);
449 goto out_unmap;
450 }
451
246d7f77 452 /* Disable all interrupts and request them */
691c9a8f 453 bcm_sf2_intr_disable(priv);
246d7f77
FF		 454
455 ret = request_irq(priv->irq0, bcm_sf2_switch_0_isr, 0,
456 "switch_0", priv);
457 if (ret < 0) {
458 pr_err("failed to request switch_0 IRQ\n");
459 goto out_unmap;
460 }
461
462 ret = request_irq(priv->irq1, bcm_sf2_switch_1_isr, 0,
463 "switch_1", priv);
464 if (ret < 0) {
465 pr_err("failed to request switch_1 IRQ\n");
466 goto out_free_irq0;
467 }
468
469 /* Reset the MIB counters */
470 reg = core_readl(priv, CORE_GMNCFGCFG);
471 reg |= RST_MIB_CNT;
472 core_writel(priv, reg, CORE_GMNCFGCFG);
473 reg &= ~RST_MIB_CNT;
474 core_writel(priv, reg, CORE_GMNCFGCFG);
475
476 /* Get the maximum number of ports for this switch */
477 priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1;
478 if (priv->hw_params.num_ports > DSA_MAX_PORTS)
479 priv->hw_params.num_ports = DSA_MAX_PORTS;
480
481 /* Assume a single GPHY setup if we can't read that property */
482 if (of_property_read_u32(dn, "brcm,num-gphy",
483 &priv->hw_params.num_gphy))
484 priv->hw_params.num_gphy = 1;
485
486 /* Enable all valid ports and disable those unused */
487 for (port = 0; port < priv->hw_params.num_ports; port++) {
488 /* IMP port receives special treatment */
489 if ((1 << port) & ds->phys_port_mask)
b6d045db 490 bcm_sf2_port_setup(ds, port, NULL);
246d7f77
FF		 491 else if (dsa_is_cpu_port(ds, port))
492 bcm_sf2_imp_setup(ds, port);
493 else
b6d045db 494 bcm_sf2_port_disable(ds, port, NULL);
246d7f77
FF		 495 }
496
497 /* Include the pseudo-PHY address and the broadcast PHY address to
498 * divert reads towards our workaround
499 */
500 ds->phys_mii_mask |= ((1 << 30) | (1 << 0));
501
502 rev = reg_readl(priv, REG_SWITCH_REVISION);
503 priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) &
504 SWITCH_TOP_REV_MASK;
505 priv->hw_params.core_rev = (rev & SF2_REV_MASK);
506
aa9aef77
FF		 507 rev = reg_readl(priv, REG_PHY_REVISION);
508 priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK;
509
246d7f77
FF		 510 pr_info("Starfighter 2 top: %x.%02x, core: %x.%02x base: 0x%p, IRQs: %d, %d\n",
511 priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff,
512 priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff,
513 priv->core, priv->irq0, priv->irq1);
514
515 return 0;
516
517out_free_irq0:
518 free_irq(priv->irq0, priv);
519out_unmap:
520 base = &priv->core;
521 for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
a566059d
FF		 522 if (*base)
523 iounmap(*base);
246d7f77
FF		 524 base++;
525 }
526 return ret;
527}
528
529static int bcm_sf2_sw_set_addr(struct dsa_switch *ds, u8 *addr)
530{
531 return 0;
532}
533
aa9aef77
FF		 534static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port)
535{
536 struct bcm_sf2_priv *priv = ds_to_priv(ds);
537
538 /* The BCM7xxx PHY driver expects to find the integrated PHY revision
539 * in bits 15:8 and the patch level in bits 7:0 which is exactly what
540 * the REG_PHY_REVISION register layout is.
541 */
542
543 return priv->hw_params.gphy_rev;
544}
545
246d7f77
FF		 546static int bcm_sf2_sw_indir_rw(struct dsa_switch *ds, int op, int addr,
547 int regnum, u16 val)
548{
549 struct bcm_sf2_priv *priv = ds_to_priv(ds);
550 int ret = 0;
551 u32 reg;
552
553 reg = reg_readl(priv, REG_SWITCH_CNTRL);
554 reg |= MDIO_MASTER_SEL;
555 reg_writel(priv, reg, REG_SWITCH_CNTRL);
556
557 /* Page << 8 | offset */
558 reg = 0x70;
559 reg <<= 2;
560 core_writel(priv, addr, reg);
561
562 /* Page << 8 | offset */
563 reg = 0x80 << 8 | regnum << 1;
564 reg <<= 2;
565
566 if (op)
567 ret = core_readl(priv, reg);
568 else
569 core_writel(priv, val, reg);
570
571 reg = reg_readl(priv, REG_SWITCH_CNTRL);
572 reg &= ~MDIO_MASTER_SEL;
573 reg_writel(priv, reg, REG_SWITCH_CNTRL);
574
575 return ret & 0xffff;
576}
577
578static int bcm_sf2_sw_phy_read(struct dsa_switch *ds, int addr, int regnum)
579{
580 /* Intercept reads from the MDIO broadcast address or Broadcom
581 * pseudo-PHY address
582 */
583 switch (addr) {
584 case 0:
585 case 30:
586 return bcm_sf2_sw_indir_rw(ds, 1, addr, regnum, 0);
587 default:
588 return 0xffff;
589 }
590}
591
592static int bcm_sf2_sw_phy_write(struct dsa_switch *ds, int addr, int regnum,
593 u16 val)
594{
595 /* Intercept writes to the MDIO broadcast address or Broadcom
596 * pseudo-PHY address
597 */
598 switch (addr) {
599 case 0:
600 case 30:
601 bcm_sf2_sw_indir_rw(ds, 0, addr, regnum, val);
602 break;
603 }
604
605 return 0;
606}
607
608static void bcm_sf2_sw_adjust_link(struct dsa_switch *ds, int port,
609 struct phy_device *phydev)
610{
611 struct bcm_sf2_priv *priv = ds_to_priv(ds);
612 u32 id_mode_dis = 0, port_mode;
613 const char *str = NULL;
614 u32 reg;
615
616 switch (phydev->interface) {
617 case PHY_INTERFACE_MODE_RGMII:
618 str = "RGMII (no delay)";
619 id_mode_dis = 1;
620 case PHY_INTERFACE_MODE_RGMII_TXID:
621 if (!str)
622 str = "RGMII (TX delay)";
623 port_mode = EXT_GPHY;
624 break;
625 case PHY_INTERFACE_MODE_MII:
626 str = "MII";
627 port_mode = EXT_EPHY;
628 break;
629 case PHY_INTERFACE_MODE_REVMII:
630 str = "Reverse MII";
631 port_mode = EXT_REVMII;
632 break;
633 default:
7de1557c
FF		 634 /* All other PHYs: internal and MoCA */
635 goto force_link;
636 }
637
638 /* If the link is down, just disable the interface to conserve power */
639 if (!phydev->link) {
640 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
641 reg &= ~RGMII_MODE_EN;
642 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
246d7f77
FF		 643 goto force_link;
644 }
645
646 /* Clear id_mode_dis bit, and the existing port mode, but
647 * make sure we enable the RGMII block for data to pass
648 */
649 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
650 reg &= ~ID_MODE_DIS;
651 reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT);
652 reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
653
654 reg |= port_mode | RGMII_MODE_EN;
655 if (id_mode_dis)
656 reg |= ID_MODE_DIS;
657
658 if (phydev->pause) {
659 if (phydev->asym_pause)
660 reg |= TX_PAUSE_EN;
661 reg |= RX_PAUSE_EN;
662 }
663
664 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
665
666 pr_info("Port %d configured for %s\n", port, str);
667
668force_link:
669 /* Force link settings detected from the PHY */
670 reg = SW_OVERRIDE;
671 switch (phydev->speed) {
672 case SPEED_1000:
673 reg |= SPDSTS_1000 << SPEED_SHIFT;
674 break;
675 case SPEED_100:
676 reg |= SPDSTS_100 << SPEED_SHIFT;
677 break;
678 }
679
680 if (phydev->link)
681 reg |= LINK_STS;
682 if (phydev->duplex == DUPLEX_FULL)
683 reg |= DUPLX_MODE;
684
685 core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(port));
686}
687
688static void bcm_sf2_sw_fixed_link_update(struct dsa_switch *ds, int port,
689 struct fixed_phy_status *status)
690{
691 struct bcm_sf2_priv *priv = ds_to_priv(ds);
7855f675 692 u32 duplex, pause, speed;
246d7f77
FF		 693 u32 reg;
694
246d7f77
FF		 695 duplex = core_readl(priv, CORE_DUPSTS);
696 pause = core_readl(priv, CORE_PAUSESTS);
697 speed = core_readl(priv, CORE_SPDSTS);
698
699 speed >>= (port * SPDSTS_SHIFT);
700 speed &= SPDSTS_MASK;
701
702 status->link = 0;
703
704 /* Port 7 is special as we do not get link status from CORE_LNKSTS,
705 * which means that we need to force the link at the port override
706 * level to get the data to flow. We do use what the interrupt handler
707 * did determine before.
7855f675
FF		 708 *
709 * For the other ports, we just force the link status, since this is
710 * a fixed PHY device.
246d7f77
FF		 711 */
712 if (port == 7) {
713 status->link = priv->port_sts[port].link;
246d7f77
FF		 714 status->duplex = 1;
715 } else {
7855f675 716 status->link = 1;
246d7f77
FF		 717 status->duplex = !!(duplex & (1 << port));
718 }
719
7855f675
FF		 720 reg = core_readl(priv, CORE_STS_OVERRIDE_GMIIP_PORT(port));
721 reg |= SW_OVERRIDE;
722 if (status->link)
723 reg |= LINK_STS;
724 else
725 reg &= ~LINK_STS;
726 core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(port));
727
246d7f77
FF		 728 switch (speed) {
729 case SPDSTS_10:
730 status->speed = SPEED_10;
731 break;
732 case SPDSTS_100:
733 status->speed = SPEED_100;
734 break;
735 case SPDSTS_1000:
736 status->speed = SPEED_1000;
737 break;
738 }
739
740 if ((pause & (1 << port)) &&
741 (pause & (1 << (port + PAUSESTS_TX_PAUSE_SHIFT)))) {
742 status->asym_pause = 1;
743 status->pause = 1;
744 }
745
746 if (pause & (1 << port))
747 status->pause = 1;
748}
749
8cfa9498
FF		 750static int bcm_sf2_sw_suspend(struct dsa_switch *ds)
751{
752 struct bcm_sf2_priv *priv = ds_to_priv(ds);
753 unsigned int port;
754
691c9a8f 755 bcm_sf2_intr_disable(priv);
8cfa9498
FF		 756
757 /* Disable all ports physically present including the IMP
758 * port, the other ones have already been disabled during
759 * bcm_sf2_sw_setup
760 */
761 for (port = 0; port < DSA_MAX_PORTS; port++) {
762 if ((1 << port) & ds->phys_port_mask ||
763 dsa_is_cpu_port(ds, port))
b6d045db 764 bcm_sf2_port_disable(ds, port, NULL);
8cfa9498
FF		 765 }
766
767 return 0;
768}
769
8cfa9498
FF		 770static int bcm_sf2_sw_resume(struct dsa_switch *ds)
771{
772 struct bcm_sf2_priv *priv = ds_to_priv(ds);
773 unsigned int port;
774 u32 reg;
775 int ret;
776
777 ret = bcm_sf2_sw_rst(priv);
778 if (ret) {
779 pr_err("%s: failed to software reset switch\n", __func__);
780 return ret;
781 }
782
783 /* Reinitialize the single GPHY */
784 if (priv->hw_params.num_gphy == 1) {
785 reg = reg_readl(priv, REG_SPHY_CNTRL);
786 reg |= PHY_RESET;
787 reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS);
788 reg_writel(priv, reg, REG_SPHY_CNTRL);
789 udelay(21);
790 reg = reg_readl(priv, REG_SPHY_CNTRL);
791 reg &= ~PHY_RESET;
792 reg_writel(priv, reg, REG_SPHY_CNTRL);
793 }
794
795 for (port = 0; port < DSA_MAX_PORTS; port++) {
796 if ((1 << port) & ds->phys_port_mask)
b6d045db 797 bcm_sf2_port_setup(ds, port, NULL);
8cfa9498
FF		 798 else if (dsa_is_cpu_port(ds, port))
799 bcm_sf2_imp_setup(ds, port);
800 }
801
802 return 0;
803}
804
96e65d7f
FF		 805static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port,
806 struct ethtool_wolinfo *wol)
807{
808 struct net_device *p = ds->dst[ds->index].master_netdev;
809 struct bcm_sf2_priv *priv = ds_to_priv(ds);
810 struct ethtool_wolinfo pwol;
811
812 /* Get the parent device WoL settings */
813 p->ethtool_ops->get_wol(p, &pwol);
814
815 /* Advertise the parent device supported settings */
816 wol->supported = pwol.supported;
817 memset(&wol->sopass, 0, sizeof(wol->sopass));
818
819 if (pwol.wolopts & WAKE_MAGICSECURE)
820 memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass));
821
822 if (priv->wol_ports_mask & (1 << port))
823 wol->wolopts = pwol.wolopts;
824 else
825 wol->wolopts = 0;
826}
827
828static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port,
829 struct ethtool_wolinfo *wol)
830{
831 struct net_device *p = ds->dst[ds->index].master_netdev;
832 struct bcm_sf2_priv *priv = ds_to_priv(ds);
833 s8 cpu_port = ds->dst[ds->index].cpu_port;
834 struct ethtool_wolinfo pwol;
835
836 p->ethtool_ops->get_wol(p, &pwol);
837 if (wol->wolopts & ~pwol.supported)
838 return -EINVAL;
839
840 if (wol->wolopts)
841 priv->wol_ports_mask |= (1 << port);
842 else
843 priv->wol_ports_mask &= ~(1 << port);
844
845 /* If we have at least one port enabled, make sure the CPU port
846 * is also enabled. If the CPU port is the last one enabled, we disable
847 * it since this configuration does not make sense.
848 */
849 if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port))
850 priv->wol_ports_mask |= (1 << cpu_port);
851 else
852 priv->wol_ports_mask &= ~(1 << cpu_port);
853
854 return p->ethtool_ops->set_wol(p, wol);
855}
856
246d7f77 857static struct dsa_switch_driver bcm_sf2_switch_driver = {
ac7a04c3 858 .tag_protocol = DSA_TAG_PROTO_BRCM,
246d7f77
FF		 859 .priv_size = sizeof(struct bcm_sf2_priv),
860 .probe = bcm_sf2_sw_probe,
861 .setup = bcm_sf2_sw_setup,
862 .set_addr = bcm_sf2_sw_set_addr,
aa9aef77 863 .get_phy_flags = bcm_sf2_sw_get_phy_flags,
246d7f77
FF		 864 .phy_read = bcm_sf2_sw_phy_read,
865 .phy_write = bcm_sf2_sw_phy_write,
866 .get_strings = bcm_sf2_sw_get_strings,
867 .get_ethtool_stats = bcm_sf2_sw_get_ethtool_stats,
868 .get_sset_count = bcm_sf2_sw_get_sset_count,
869 .adjust_link = bcm_sf2_sw_adjust_link,
870 .fixed_link_update = bcm_sf2_sw_fixed_link_update,
8cfa9498
FF		 871 .suspend = bcm_sf2_sw_suspend,
872 .resume = bcm_sf2_sw_resume,
96e65d7f
FF		 873 .get_wol = bcm_sf2_sw_get_wol,
874 .set_wol = bcm_sf2_sw_set_wol,
b6d045db
FF		 875 .port_enable = bcm_sf2_port_setup,
876 .port_disable = bcm_sf2_port_disable,
450b05c1
FF		 877 .get_eee = bcm_sf2_sw_get_eee,
878 .set_eee = bcm_sf2_sw_set_eee,
246d7f77
FF		 879};
880
881static int __init bcm_sf2_init(void)
882{
883 register_switch_driver(&bcm_sf2_switch_driver);
884
885 return 0;
886}
887module_init(bcm_sf2_init);
888
889static void __exit bcm_sf2_exit(void)
890{
891 unregister_switch_driver(&bcm_sf2_switch_driver);
892}
893module_exit(bcm_sf2_exit);
894
895MODULE_AUTHOR("Broadcom Corporation");
896MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip");
897MODULE_LICENSE("GPL");
898MODULE_ALIAS("platform:brcm-sf2");
Linux kernel - Deliverables
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