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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 <linux/of_net.h>
25#include <linux/of_mdio.h>
26#include <net/dsa.h>
27#include <linux/ethtool.h>
28#include <linux/if_bridge.h>
29#include <linux/brcmphy.h>
30#include <linux/etherdevice.h>
31#include <net/switchdev.h>
32#include <linux/platform_data/b53.h>
33
34#include "bcm_sf2.h"
35#include "bcm_sf2_regs.h"
36#include "b53/b53_priv.h"
37#include "b53/b53_regs.h"
38
39static enum dsa_tag_protocol bcm_sf2_sw_get_tag_protocol(struct dsa_switch *ds)
40{
41 return DSA_TAG_PROTO_BRCM;
42}
43
44static void bcm_sf2_imp_vlan_setup(struct dsa_switch *ds, int cpu_port)
45{
46 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
47 unsigned int i;
48 u32 reg;
49
50 /* Enable the IMP Port to be in the same VLAN as the other ports
51 * on a per-port basis such that we only have Port i and IMP in
52 * the same VLAN.
53 */
54 for (i = 0; i < priv->hw_params.num_ports; i++) {
55 if (!((1 << i) & ds->enabled_port_mask))
56 continue;
57
58 reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(i));
59 reg |= (1 << cpu_port);
60 core_writel(priv, reg, CORE_PORT_VLAN_CTL_PORT(i));
61 }
62}
63
64static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
65{
66 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
67 u32 reg, val;
68
69 /* Enable the port memories */
70 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
71 reg &= ~P_TXQ_PSM_VDD(port);
72 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
73
74 /* Enable Broadcast, Multicast, Unicast forwarding to IMP port */
75 reg = core_readl(priv, CORE_IMP_CTL);
76 reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN);
77 reg &= ~(RX_DIS | TX_DIS);
78 core_writel(priv, reg, CORE_IMP_CTL);
79
80 /* Enable forwarding */
81 core_writel(priv, SW_FWDG_EN, CORE_SWMODE);
82
83 /* Enable IMP port in dumb mode */
84 reg = core_readl(priv, CORE_SWITCH_CTRL);
85 reg |= MII_DUMB_FWDG_EN;
86 core_writel(priv, reg, CORE_SWITCH_CTRL);
87
88 /* Resolve which bit controls the Broadcom tag */
89 switch (port) {
90 case 8:
91 val = BRCM_HDR_EN_P8;
92 break;
93 case 7:
94 val = BRCM_HDR_EN_P7;
95 break;
96 case 5:
97 val = BRCM_HDR_EN_P5;
98 break;
99 default:
100 val = 0;
101 break;
102 }
103
104 /* Enable Broadcom tags for IMP port */
105 reg = core_readl(priv, CORE_BRCM_HDR_CTRL);
106 reg |= val;
107 core_writel(priv, reg, CORE_BRCM_HDR_CTRL);
108
109 /* Enable reception Broadcom tag for CPU TX (switch RX) to
110 * allow us to tag outgoing frames
111 */
112 reg = core_readl(priv, CORE_BRCM_HDR_RX_DIS);
113 reg &= ~(1 << port);
114 core_writel(priv, reg, CORE_BRCM_HDR_RX_DIS);
115
116 /* Enable transmission of Broadcom tags from the switch (CPU RX) to
117 * allow delivering frames to the per-port net_devices
118 */
119 reg = core_readl(priv, CORE_BRCM_HDR_TX_DIS);
120 reg &= ~(1 << port);
121 core_writel(priv, reg, CORE_BRCM_HDR_TX_DIS);
122
123 /* Force link status for IMP port */
124 reg = core_readl(priv, CORE_STS_OVERRIDE_IMP);
125 reg |= (MII_SW_OR | LINK_STS);
126 core_writel(priv, reg, CORE_STS_OVERRIDE_IMP);
127}
128
129static void bcm_sf2_eee_enable_set(struct dsa_switch *ds, int port, bool enable)
130{
131 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
132 u32 reg;
133
134 reg = core_readl(priv, CORE_EEE_EN_CTRL);
135 if (enable)
136 reg |= 1 << port;
137 else
138 reg &= ~(1 << port);
139 core_writel(priv, reg, CORE_EEE_EN_CTRL);
140}
141
142static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable)
143{
144 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
145 u32 reg;
146
147 reg = reg_readl(priv, REG_SPHY_CNTRL);
148 if (enable) {
149 reg |= PHY_RESET;
150 reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | CK25_DIS);
151 reg_writel(priv, reg, REG_SPHY_CNTRL);
152 udelay(21);
153 reg = reg_readl(priv, REG_SPHY_CNTRL);
154 reg &= ~PHY_RESET;
155 } else {
156 reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET;
157 reg_writel(priv, reg, REG_SPHY_CNTRL);
158 mdelay(1);
159 reg |= CK25_DIS;
160 }
161 reg_writel(priv, reg, REG_SPHY_CNTRL);
162
163 /* Use PHY-driven LED signaling */
164 if (!enable) {
165 reg = reg_readl(priv, REG_LED_CNTRL(0));
166 reg |= SPDLNK_SRC_SEL;
167 reg_writel(priv, reg, REG_LED_CNTRL(0));
168 }
169}
170
171static inline void bcm_sf2_port_intr_enable(struct bcm_sf2_priv *priv,
172 int port)
173{
174 unsigned int off;
175
176 switch (port) {
177 case 7:
178 off = P7_IRQ_OFF;
179 break;
180 case 0:
181 /* Port 0 interrupts are located on the first bank */
182 intrl2_0_mask_clear(priv, P_IRQ_MASK(P0_IRQ_OFF));
183 return;
184 default:
185 off = P_IRQ_OFF(port);
186 break;
187 }
188
189 intrl2_1_mask_clear(priv, P_IRQ_MASK(off));
190}
191
192static inline void bcm_sf2_port_intr_disable(struct bcm_sf2_priv *priv,
193 int port)
194{
195 unsigned int off;
196
197 switch (port) {
198 case 7:
199 off = P7_IRQ_OFF;
200 break;
201 case 0:
202 /* Port 0 interrupts are located on the first bank */
203 intrl2_0_mask_set(priv, P_IRQ_MASK(P0_IRQ_OFF));
204 intrl2_0_writel(priv, P_IRQ_MASK(P0_IRQ_OFF), INTRL2_CPU_CLEAR);
205 return;
206 default:
207 off = P_IRQ_OFF(port);
208 break;
209 }
210
211 intrl2_1_mask_set(priv, P_IRQ_MASK(off));
212 intrl2_1_writel(priv, P_IRQ_MASK(off), INTRL2_CPU_CLEAR);
213}
214
215static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
216 struct phy_device *phy)
217{
218 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
219 s8 cpu_port = ds->dst[ds->index].cpu_port;
220 u32 reg;
221
222 /* Clear the memory power down */
223 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
224 reg &= ~P_TXQ_PSM_VDD(port);
225 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
226
227 /* Clear the Rx and Tx disable bits and set to no spanning tree */
228 core_writel(priv, 0, CORE_G_PCTL_PORT(port));
229
230 /* Re-enable the GPHY and re-apply workarounds */
231 if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) {
232 bcm_sf2_gphy_enable_set(ds, true);
233 if (phy) {
234 /* if phy_stop() has been called before, phy
235 * will be in halted state, and phy_start()
236 * will call resume.
237 *
238 * the resume path does not configure back
239 * autoneg settings, and since we hard reset
240 * the phy manually here, we need to reset the
241 * state machine also.
242 */
243 phy->state = PHY_READY;
244 phy_init_hw(phy);
245 }
246 }
247
248 /* Enable MoCA port interrupts to get notified */
249 if (port == priv->moca_port)
250 bcm_sf2_port_intr_enable(priv, port);
251
252 /* Set this port, and only this one to be in the default VLAN,
253 * if member of a bridge, restore its membership prior to
254 * bringing down this port.
255 */
256 reg = core_readl(priv, CORE_PORT_VLAN_CTL_PORT(port));
257 reg &= ~PORT_VLAN_CTRL_MASK;
258 reg |= (1 << port);
259 reg |= priv->dev->ports[port].vlan_ctl_mask;
260 core_writel(priv, reg, CORE_PORT_VLAN_CTL_PORT(port));
261
262 bcm_sf2_imp_vlan_setup(ds, cpu_port);
263
264 /* If EEE was enabled, restore it */
265 if (priv->port_sts[port].eee.eee_enabled)
266 bcm_sf2_eee_enable_set(ds, port, true);
267
268 return 0;
269}
270
271static void bcm_sf2_port_disable(struct dsa_switch *ds, int port,
272 struct phy_device *phy)
273{
274 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
275 u32 off, reg;
276
277 if (priv->wol_ports_mask & (1 << port))
278 return;
279
280 if (port == priv->moca_port)
281 bcm_sf2_port_intr_disable(priv, port);
282
283 if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1)
284 bcm_sf2_gphy_enable_set(ds, false);
285
286 if (dsa_is_cpu_port(ds, port))
287 off = CORE_IMP_CTL;
288 else
289 off = CORE_G_PCTL_PORT(port);
290
291 reg = core_readl(priv, off);
292 reg |= RX_DIS | TX_DIS;
293 core_writel(priv, reg, off);
294
295 /* Power down the port memory */
296 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
297 reg |= P_TXQ_PSM_VDD(port);
298 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
299}
300
301/* Returns 0 if EEE was not enabled, or 1 otherwise
302 */
303static int bcm_sf2_eee_init(struct dsa_switch *ds, int port,
304 struct phy_device *phy)
305{
306 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
307 struct ethtool_eee *p = &priv->port_sts[port].eee;
308 int ret;
309
310 p->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_100baseT_Full);
311
312 ret = phy_init_eee(phy, 0);
313 if (ret)
314 return 0;
315
316 bcm_sf2_eee_enable_set(ds, port, true);
317
318 return 1;
319}
320
321static int bcm_sf2_sw_get_eee(struct dsa_switch *ds, int port,
322 struct ethtool_eee *e)
323{
324 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
325 struct ethtool_eee *p = &priv->port_sts[port].eee;
326 u32 reg;
327
328 reg = core_readl(priv, CORE_EEE_LPI_INDICATE);
329 e->eee_enabled = p->eee_enabled;
330 e->eee_active = !!(reg & (1 << port));
331
332 return 0;
333}
334
335static int bcm_sf2_sw_set_eee(struct dsa_switch *ds, int port,
336 struct phy_device *phydev,
337 struct ethtool_eee *e)
338{
339 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
340 struct ethtool_eee *p = &priv->port_sts[port].eee;
341
342 p->eee_enabled = e->eee_enabled;
343
344 if (!p->eee_enabled) {
345 bcm_sf2_eee_enable_set(ds, port, false);
346 } else {
347 p->eee_enabled = bcm_sf2_eee_init(ds, port, phydev);
348 if (!p->eee_enabled)
349 return -EOPNOTSUPP;
350 }
351
352 return 0;
353}
354
355static int bcm_sf2_sw_indir_rw(struct bcm_sf2_priv *priv, int op, int addr,
356 int regnum, u16 val)
357{
358 int ret = 0;
359 u32 reg;
360
361 reg = reg_readl(priv, REG_SWITCH_CNTRL);
362 reg |= MDIO_MASTER_SEL;
363 reg_writel(priv, reg, REG_SWITCH_CNTRL);
364
365 /* Page << 8 | offset */
366 reg = 0x70;
367 reg <<= 2;
368 core_writel(priv, addr, reg);
369
370 /* Page << 8 | offset */
371 reg = 0x80 << 8 | regnum << 1;
372 reg <<= 2;
373
374 if (op)
375 ret = core_readl(priv, reg);
376 else
377 core_writel(priv, val, reg);
378
379 reg = reg_readl(priv, REG_SWITCH_CNTRL);
380 reg &= ~MDIO_MASTER_SEL;
381 reg_writel(priv, reg, REG_SWITCH_CNTRL);
382
383 return ret & 0xffff;
384}
385
386static int bcm_sf2_sw_mdio_read(struct mii_bus *bus, int addr, int regnum)
387{
388 struct bcm_sf2_priv *priv = bus->priv;
389
390 /* Intercept reads from Broadcom pseudo-PHY address, else, send
391 * them to our master MDIO bus controller
392 */
393 if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
394 return bcm_sf2_sw_indir_rw(priv, 1, addr, regnum, 0);
395 else
396 return mdiobus_read_nested(priv->master_mii_bus, addr, regnum);
397}
398
399static int bcm_sf2_sw_mdio_write(struct mii_bus *bus, int addr, int regnum,
400 u16 val)
401{
402 struct bcm_sf2_priv *priv = bus->priv;
403
404 /* Intercept writes to the Broadcom pseudo-PHY address, else,
405 * send them to our master MDIO bus controller
406 */
407 if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
408 bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val);
409 else
410 mdiobus_write_nested(priv->master_mii_bus, addr, regnum, val);
411
412 return 0;
413}
414
415static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id)
416{
417 struct bcm_sf2_priv *priv = dev_id;
418
419 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
420 ~priv->irq0_mask;
421 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
422
423 return IRQ_HANDLED;
424}
425
426static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id)
427{
428 struct bcm_sf2_priv *priv = dev_id;
429
430 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
431 ~priv->irq1_mask;
432 intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR);
433
434 if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF))
435 priv->port_sts[7].link = 1;
436 if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF))
437 priv->port_sts[7].link = 0;
438
439 return IRQ_HANDLED;
440}
441
442static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv)
443{
444 unsigned int timeout = 1000;
445 u32 reg;
446
447 reg = core_readl(priv, CORE_WATCHDOG_CTRL);
448 reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET;
449 core_writel(priv, reg, CORE_WATCHDOG_CTRL);
450
451 do {
452 reg = core_readl(priv, CORE_WATCHDOG_CTRL);
453 if (!(reg & SOFTWARE_RESET))
454 break;
455
456 usleep_range(1000, 2000);
457 } while (timeout-- > 0);
458
459 if (timeout == 0)
460 return -ETIMEDOUT;
461
462 return 0;
463}
464
465static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv)
466{
467 intrl2_0_mask_set(priv, 0xffffffff);
468 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
469 intrl2_1_mask_set(priv, 0xffffffff);
470 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
471}
472
473static void bcm_sf2_identify_ports(struct bcm_sf2_priv *priv,
474 struct device_node *dn)
475{
476 struct device_node *port;
477 const char *phy_mode_str;
478 int mode;
479 unsigned int port_num;
480 int ret;
481
482 priv->moca_port = -1;
483
484 for_each_available_child_of_node(dn, port) {
485 if (of_property_read_u32(port, "reg", &port_num))
486 continue;
487
488 /* Internal PHYs get assigned a specific 'phy-mode' property
489 * value: "internal" to help flag them before MDIO probing
490 * has completed, since they might be turned off at that
491 * time
492 */
493 mode = of_get_phy_mode(port);
494 if (mode < 0) {
495 ret = of_property_read_string(port, "phy-mode",
496 &phy_mode_str);
497 if (ret < 0)
498 continue;
499
500 if (!strcasecmp(phy_mode_str, "internal"))
501 priv->int_phy_mask |= 1 << port_num;
502 }
503
504 if (mode == PHY_INTERFACE_MODE_MOCA)
505 priv->moca_port = port_num;
506 }
507}
508
509static int bcm_sf2_mdio_register(struct dsa_switch *ds)
510{
511 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
512 struct device_node *dn;
513 static int index;
514 int err;
515
516 /* Find our integrated MDIO bus node */
517 dn = of_find_compatible_node(NULL, NULL, "brcm,unimac-mdio");
518 priv->master_mii_bus = of_mdio_find_bus(dn);
519 if (!priv->master_mii_bus)
520 return -EPROBE_DEFER;
521
522 get_device(&priv->master_mii_bus->dev);
523 priv->master_mii_dn = dn;
524
525 priv->slave_mii_bus = devm_mdiobus_alloc(ds->dev);
526 if (!priv->slave_mii_bus)
527 return -ENOMEM;
528
529 priv->slave_mii_bus->priv = priv;
530 priv->slave_mii_bus->name = "sf2 slave mii";
531 priv->slave_mii_bus->read = bcm_sf2_sw_mdio_read;
532 priv->slave_mii_bus->write = bcm_sf2_sw_mdio_write;
533 snprintf(priv->slave_mii_bus->id, MII_BUS_ID_SIZE, "sf2-%d",
534 index++);
535 priv->slave_mii_bus->dev.of_node = dn;
536
537 /* Include the pseudo-PHY address to divert reads towards our
538 * workaround. This is only required for 7445D0, since 7445E0
539 * disconnects the internal switch pseudo-PHY such that we can use the
540 * regular SWITCH_MDIO master controller instead.
541 *
542 * Here we flag the pseudo PHY as needing special treatment and would
543 * otherwise make all other PHY read/writes go to the master MDIO bus
544 * controller that comes with this switch backed by the "mdio-unimac"
545 * driver.
546 */
547 if (of_machine_is_compatible("brcm,bcm7445d0"))
548 priv->indir_phy_mask |= (1 << BRCM_PSEUDO_PHY_ADDR);
549 else
550 priv->indir_phy_mask = 0;
551
552 ds->phys_mii_mask = priv->indir_phy_mask;
553 ds->slave_mii_bus = priv->slave_mii_bus;
554 priv->slave_mii_bus->parent = ds->dev->parent;
555 priv->slave_mii_bus->phy_mask = ~priv->indir_phy_mask;
556
557 if (dn)
558 err = of_mdiobus_register(priv->slave_mii_bus, dn);
559 else
560 err = mdiobus_register(priv->slave_mii_bus);
561
562 if (err)
563 of_node_put(dn);
564
565 return err;
566}
567
568static void bcm_sf2_mdio_unregister(struct bcm_sf2_priv *priv)
569{
570 mdiobus_unregister(priv->slave_mii_bus);
571 if (priv->master_mii_dn)
572 of_node_put(priv->master_mii_dn);
573}
574
575static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port)
576{
577 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
578
579 /* The BCM7xxx PHY driver expects to find the integrated PHY revision
580 * in bits 15:8 and the patch level in bits 7:0 which is exactly what
581 * the REG_PHY_REVISION register layout is.
582 */
583
584 return priv->hw_params.gphy_rev;
585}
586
587static void bcm_sf2_sw_adjust_link(struct dsa_switch *ds, int port,
588 struct phy_device *phydev)
589{
590 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
591 struct ethtool_eee *p = &priv->port_sts[port].eee;
592 u32 id_mode_dis = 0, port_mode;
593 const char *str = NULL;
594 u32 reg;
595
596 switch (phydev->interface) {
597 case PHY_INTERFACE_MODE_RGMII:
598 str = "RGMII (no delay)";
599 id_mode_dis = 1;
600 case PHY_INTERFACE_MODE_RGMII_TXID:
601 if (!str)
602 str = "RGMII (TX delay)";
603 port_mode = EXT_GPHY;
604 break;
605 case PHY_INTERFACE_MODE_MII:
606 str = "MII";
607 port_mode = EXT_EPHY;
608 break;
609 case PHY_INTERFACE_MODE_REVMII:
610 str = "Reverse MII";
611 port_mode = EXT_REVMII;
612 break;
613 default:
614 /* All other PHYs: internal and MoCA */
615 goto force_link;
616 }
617
618 /* If the link is down, just disable the interface to conserve power */
619 if (!phydev->link) {
620 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
621 reg &= ~RGMII_MODE_EN;
622 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
623 goto force_link;
624 }
625
626 /* Clear id_mode_dis bit, and the existing port mode, but
627 * make sure we enable the RGMII block for data to pass
628 */
629 reg = reg_readl(priv, REG_RGMII_CNTRL_P(port));
630 reg &= ~ID_MODE_DIS;
631 reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT);
632 reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
633
634 reg |= port_mode | RGMII_MODE_EN;
635 if (id_mode_dis)
636 reg |= ID_MODE_DIS;
637
638 if (phydev->pause) {
639 if (phydev->asym_pause)
640 reg |= TX_PAUSE_EN;
641 reg |= RX_PAUSE_EN;
642 }
643
644 reg_writel(priv, reg, REG_RGMII_CNTRL_P(port));
645
646 pr_info("Port %d configured for %s\n", port, str);
647
648force_link:
649 /* Force link settings detected from the PHY */
650 reg = SW_OVERRIDE;
651 switch (phydev->speed) {
652 case SPEED_1000:
653 reg |= SPDSTS_1000 << SPEED_SHIFT;
654 break;
655 case SPEED_100:
656 reg |= SPDSTS_100 << SPEED_SHIFT;
657 break;
658 }
659
660 if (phydev->link)
661 reg |= LINK_STS;
662 if (phydev->duplex == DUPLEX_FULL)
663 reg |= DUPLX_MODE;
664
665 core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(port));
666
667 if (!phydev->is_pseudo_fixed_link)
668 p->eee_enabled = bcm_sf2_eee_init(ds, port, phydev);
669}
670
671static void bcm_sf2_sw_fixed_link_update(struct dsa_switch *ds, int port,
672 struct fixed_phy_status *status)
673{
674 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
675 u32 duplex, pause;
676 u32 reg;
677
678 duplex = core_readl(priv, CORE_DUPSTS);
679 pause = core_readl(priv, CORE_PAUSESTS);
680
681 status->link = 0;
682
683 /* MoCA port is special as we do not get link status from CORE_LNKSTS,
684 * which means that we need to force the link at the port override
685 * level to get the data to flow. We do use what the interrupt handler
686 * did determine before.
687 *
688 * For the other ports, we just force the link status, since this is
689 * a fixed PHY device.
690 */
691 if (port == priv->moca_port) {
692 status->link = priv->port_sts[port].link;
693 /* For MoCA interfaces, also force a link down notification
694 * since some version of the user-space daemon (mocad) use
695 * cmd->autoneg to force the link, which messes up the PHY
696 * state machine and make it go in PHY_FORCING state instead.
697 */
698 if (!status->link)
699 netif_carrier_off(ds->ports[port].netdev);
700 status->duplex = 1;
701 } else {
702 status->link = 1;
703 status->duplex = !!(duplex & (1 << port));
704 }
705
706 reg = core_readl(priv, CORE_STS_OVERRIDE_GMIIP_PORT(port));
707 reg |= SW_OVERRIDE;
708 if (status->link)
709 reg |= LINK_STS;
710 else
711 reg &= ~LINK_STS;
712 core_writel(priv, reg, CORE_STS_OVERRIDE_GMIIP_PORT(port));
713
714 if ((pause & (1 << port)) &&
715 (pause & (1 << (port + PAUSESTS_TX_PAUSE_SHIFT)))) {
716 status->asym_pause = 1;
717 status->pause = 1;
718 }
719
720 if (pause & (1 << port))
721 status->pause = 1;
722}
723
724static int bcm_sf2_sw_suspend(struct dsa_switch *ds)
725{
726 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
727 unsigned int port;
728
729 bcm_sf2_intr_disable(priv);
730
731 /* Disable all ports physically present including the IMP
732 * port, the other ones have already been disabled during
733 * bcm_sf2_sw_setup
734 */
735 for (port = 0; port < DSA_MAX_PORTS; port++) {
736 if ((1 << port) & ds->enabled_port_mask ||
737 dsa_is_cpu_port(ds, port))
738 bcm_sf2_port_disable(ds, port, NULL);
739 }
740
741 return 0;
742}
743
744static int bcm_sf2_sw_resume(struct dsa_switch *ds)
745{
746 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
747 unsigned int port;
748 int ret;
749
750 ret = bcm_sf2_sw_rst(priv);
751 if (ret) {
752 pr_err("%s: failed to software reset switch\n", __func__);
753 return ret;
754 }
755
756 if (priv->hw_params.num_gphy == 1)
757 bcm_sf2_gphy_enable_set(ds, true);
758
759 for (port = 0; port < DSA_MAX_PORTS; port++) {
760 if ((1 << port) & ds->enabled_port_mask)
761 bcm_sf2_port_setup(ds, port, NULL);
762 else if (dsa_is_cpu_port(ds, port))
763 bcm_sf2_imp_setup(ds, port);
764 }
765
766 return 0;
767}
768
769static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port,
770 struct ethtool_wolinfo *wol)
771{
772 struct net_device *p = ds->dst[ds->index].master_netdev;
773 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
774 struct ethtool_wolinfo pwol;
775
776 /* Get the parent device WoL settings */
777 p->ethtool_ops->get_wol(p, &pwol);
778
779 /* Advertise the parent device supported settings */
780 wol->supported = pwol.supported;
781 memset(&wol->sopass, 0, sizeof(wol->sopass));
782
783 if (pwol.wolopts & WAKE_MAGICSECURE)
784 memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass));
785
786 if (priv->wol_ports_mask & (1 << port))
787 wol->wolopts = pwol.wolopts;
788 else
789 wol->wolopts = 0;
790}
791
792static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port,
793 struct ethtool_wolinfo *wol)
794{
795 struct net_device *p = ds->dst[ds->index].master_netdev;
796 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
797 s8 cpu_port = ds->dst[ds->index].cpu_port;
798 struct ethtool_wolinfo pwol;
799
800 p->ethtool_ops->get_wol(p, &pwol);
801 if (wol->wolopts & ~pwol.supported)
802 return -EINVAL;
803
804 if (wol->wolopts)
805 priv->wol_ports_mask |= (1 << port);
806 else
807 priv->wol_ports_mask &= ~(1 << port);
808
809 /* If we have at least one port enabled, make sure the CPU port
810 * is also enabled. If the CPU port is the last one enabled, we disable
811 * it since this configuration does not make sense.
812 */
813 if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port))
814 priv->wol_ports_mask |= (1 << cpu_port);
815 else
816 priv->wol_ports_mask &= ~(1 << cpu_port);
817
818 return p->ethtool_ops->set_wol(p, wol);
819}
820
821static int bcm_sf2_vlan_op_wait(struct bcm_sf2_priv *priv)
822{
823 unsigned int timeout = 10;
824 u32 reg;
825
826 do {
827 reg = core_readl(priv, CORE_ARLA_VTBL_RWCTRL);
828 if (!(reg & ARLA_VTBL_STDN))
829 return 0;
830
831 usleep_range(1000, 2000);
832 } while (timeout--);
833
834 return -ETIMEDOUT;
835}
836
837static int bcm_sf2_vlan_op(struct bcm_sf2_priv *priv, u8 op)
838{
839 core_writel(priv, ARLA_VTBL_STDN | op, CORE_ARLA_VTBL_RWCTRL);
840
841 return bcm_sf2_vlan_op_wait(priv);
842}
843
844static void bcm_sf2_sw_configure_vlan(struct dsa_switch *ds)
845{
846 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
847 unsigned int port;
848
849 /* Clear all VLANs */
850 bcm_sf2_vlan_op(priv, ARLA_VTBL_CMD_CLEAR);
851
852 for (port = 0; port < priv->hw_params.num_ports; port++) {
853 if (!((1 << port) & ds->enabled_port_mask))
854 continue;
855
856 core_writel(priv, 1, CORE_DEFAULT_1Q_TAG_P(port));
857 }
858}
859
860static int bcm_sf2_sw_setup(struct dsa_switch *ds)
861{
862 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
863 unsigned int port;
864
865 /* Enable all valid ports and disable those unused */
866 for (port = 0; port < priv->hw_params.num_ports; port++) {
867 /* IMP port receives special treatment */
868 if ((1 << port) & ds->enabled_port_mask)
869 bcm_sf2_port_setup(ds, port, NULL);
870 else if (dsa_is_cpu_port(ds, port))
871 bcm_sf2_imp_setup(ds, port);
872 else
873 bcm_sf2_port_disable(ds, port, NULL);
874 }
875
876 bcm_sf2_sw_configure_vlan(ds);
877
878 return 0;
879}
880
881/* The SWITCH_CORE register space is managed by b53 but operates on a page +
882 * register basis so we need to translate that into an address that the
883 * bus-glue understands.
884 */
885#define SF2_PAGE_REG_MKADDR(page, reg) ((page) << 10 | (reg) << 2)
886
887static int bcm_sf2_core_read8(struct b53_device *dev, u8 page, u8 reg,
888 u8 *val)
889{
890 struct bcm_sf2_priv *priv = dev->priv;
891
892 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
893
894 return 0;
895}
896
897static int bcm_sf2_core_read16(struct b53_device *dev, u8 page, u8 reg,
898 u16 *val)
899{
900 struct bcm_sf2_priv *priv = dev->priv;
901
902 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
903
904 return 0;
905}
906
907static int bcm_sf2_core_read32(struct b53_device *dev, u8 page, u8 reg,
908 u32 *val)
909{
910 struct bcm_sf2_priv *priv = dev->priv;
911
912 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
913
914 return 0;
915}
916
917static int bcm_sf2_core_read64(struct b53_device *dev, u8 page, u8 reg,
918 u64 *val)
919{
920 struct bcm_sf2_priv *priv = dev->priv;
921
922 *val = core_readq(priv, SF2_PAGE_REG_MKADDR(page, reg));
923
924 return 0;
925}
926
927static int bcm_sf2_core_write8(struct b53_device *dev, u8 page, u8 reg,
928 u8 value)
929{
930 struct bcm_sf2_priv *priv = dev->priv;
931
932 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
933
934 return 0;
935}
936
937static int bcm_sf2_core_write16(struct b53_device *dev, u8 page, u8 reg,
938 u16 value)
939{
940 struct bcm_sf2_priv *priv = dev->priv;
941
942 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
943
944 return 0;
945}
946
947static int bcm_sf2_core_write32(struct b53_device *dev, u8 page, u8 reg,
948 u32 value)
949{
950 struct bcm_sf2_priv *priv = dev->priv;
951
952 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
953
954 return 0;
955}
956
957static int bcm_sf2_core_write64(struct b53_device *dev, u8 page, u8 reg,
958 u64 value)
959{
960 struct bcm_sf2_priv *priv = dev->priv;
961
962 core_writeq(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
963
964 return 0;
965}
966
967static struct b53_io_ops bcm_sf2_io_ops = {
968 .read8 = bcm_sf2_core_read8,
969 .read16 = bcm_sf2_core_read16,
970 .read32 = bcm_sf2_core_read32,
971 .read48 = bcm_sf2_core_read64,
972 .read64 = bcm_sf2_core_read64,
973 .write8 = bcm_sf2_core_write8,
974 .write16 = bcm_sf2_core_write16,
975 .write32 = bcm_sf2_core_write32,
976 .write48 = bcm_sf2_core_write64,
977 .write64 = bcm_sf2_core_write64,
978};
979
980static int bcm_sf2_sw_probe(struct platform_device *pdev)
981{
982 const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME;
983 struct device_node *dn = pdev->dev.of_node;
984 struct b53_platform_data *pdata;
985 struct dsa_switch_ops *ops;
986 struct bcm_sf2_priv *priv;
987 struct b53_device *dev;
988 struct dsa_switch *ds;
989 void __iomem **base;
990 struct resource *r;
991 unsigned int i;
992 u32 reg, rev;
993 int ret;
994
995 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
996 if (!priv)
997 return -ENOMEM;
998
999 ops = devm_kzalloc(&pdev->dev, sizeof(*ops), GFP_KERNEL);
1000 if (!ops)
1001 return -ENOMEM;
1002
1003 dev = b53_switch_alloc(&pdev->dev, &bcm_sf2_io_ops, priv);
1004 if (!dev)
1005 return -ENOMEM;
1006
1007 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
1008 if (!pdata)
1009 return -ENOMEM;
1010
1011 /* Auto-detection using standard registers will not work, so
1012 * provide an indication of what kind of device we are for
1013 * b53_common to work with
1014 */
1015 pdata->chip_id = BCM7445_DEVICE_ID;
1016 dev->pdata = pdata;
1017
1018 priv->dev = dev;
1019 ds = dev->ds;
1020
1021 /* Override the parts that are non-standard wrt. normal b53 devices */
1022 memcpy(ops, ds->ops, sizeof(*ops));
1023 ds->ops = ops;
1024 ds->ops->get_tag_protocol = bcm_sf2_sw_get_tag_protocol;
1025 ds->ops->setup = bcm_sf2_sw_setup;
1026 ds->ops->get_phy_flags = bcm_sf2_sw_get_phy_flags;
1027 ds->ops->adjust_link = bcm_sf2_sw_adjust_link;
1028 ds->ops->fixed_link_update = bcm_sf2_sw_fixed_link_update;
1029 ds->ops->suspend = bcm_sf2_sw_suspend;
1030 ds->ops->resume = bcm_sf2_sw_resume;
1031 ds->ops->get_wol = bcm_sf2_sw_get_wol;
1032 ds->ops->set_wol = bcm_sf2_sw_set_wol;
1033 ds->ops->port_enable = bcm_sf2_port_setup;
1034 ds->ops->port_disable = bcm_sf2_port_disable;
1035 ds->ops->get_eee = bcm_sf2_sw_get_eee;
1036 ds->ops->set_eee = bcm_sf2_sw_set_eee;
1037
1038 /* Avoid having DSA free our slave MDIO bus (checking for
1039 * ds->slave_mii_bus and ds->ops->phy_read being non-NULL)
1040 */
1041 ds->ops->phy_read = NULL;
1042
1043 dev_set_drvdata(&pdev->dev, priv);
1044
1045 spin_lock_init(&priv->indir_lock);
1046 mutex_init(&priv->stats_mutex);
1047
1048 bcm_sf2_identify_ports(priv, dn->child);
1049
1050 priv->irq0 = irq_of_parse_and_map(dn, 0);
1051 priv->irq1 = irq_of_parse_and_map(dn, 1);
1052
1053 base = &priv->core;
1054 for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
1055 r = platform_get_resource(pdev, IORESOURCE_MEM, i);
1056 *base = devm_ioremap_resource(&pdev->dev, r);
1057 if (IS_ERR(*base)) {
1058 pr_err("unable to find register: %s\n", reg_names[i]);
1059 return PTR_ERR(*base);
1060 }
1061 base++;
1062 }
1063
1064 ret = bcm_sf2_sw_rst(priv);
1065 if (ret) {
1066 pr_err("unable to software reset switch: %d\n", ret);
1067 return ret;
1068 }
1069
1070 ret = bcm_sf2_mdio_register(ds);
1071 if (ret) {
1072 pr_err("failed to register MDIO bus\n");
1073 return ret;
1074 }
1075
1076 /* Disable all interrupts and request them */
1077 bcm_sf2_intr_disable(priv);
1078
1079 ret = devm_request_irq(&pdev->dev, priv->irq0, bcm_sf2_switch_0_isr, 0,
1080 "switch_0", priv);
1081 if (ret < 0) {
1082 pr_err("failed to request switch_0 IRQ\n");
1083 goto out_mdio;
1084 }
1085
1086 ret = devm_request_irq(&pdev->dev, priv->irq1, bcm_sf2_switch_1_isr, 0,
1087 "switch_1", priv);
1088 if (ret < 0) {
1089 pr_err("failed to request switch_1 IRQ\n");
1090 goto out_mdio;
1091 }
1092
1093 /* Reset the MIB counters */
1094 reg = core_readl(priv, CORE_GMNCFGCFG);
1095 reg |= RST_MIB_CNT;
1096 core_writel(priv, reg, CORE_GMNCFGCFG);
1097 reg &= ~RST_MIB_CNT;
1098 core_writel(priv, reg, CORE_GMNCFGCFG);
1099
1100 /* Get the maximum number of ports for this switch */
1101 priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1;
1102 if (priv->hw_params.num_ports > DSA_MAX_PORTS)
1103 priv->hw_params.num_ports = DSA_MAX_PORTS;
1104
1105 /* Assume a single GPHY setup if we can't read that property */
1106 if (of_property_read_u32(dn, "brcm,num-gphy",
1107 &priv->hw_params.num_gphy))
1108 priv->hw_params.num_gphy = 1;
1109
1110 rev = reg_readl(priv, REG_SWITCH_REVISION);
1111 priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) &
1112 SWITCH_TOP_REV_MASK;
1113 priv->hw_params.core_rev = (rev & SF2_REV_MASK);
1114
1115 rev = reg_readl(priv, REG_PHY_REVISION);
1116 priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK;
1117
1118 ret = b53_switch_register(dev);
1119 if (ret)
1120 goto out_mdio;
1121
1122 pr_info("Starfighter 2 top: %x.%02x, core: %x.%02x base: 0x%p, IRQs: %d, %d\n",
1123 priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff,
1124 priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff,
1125 priv->core, priv->irq0, priv->irq1);
1126
1127 return 0;
1128
1129out_mdio:
1130 bcm_sf2_mdio_unregister(priv);
1131 return ret;
1132}
1133
1134static int bcm_sf2_sw_remove(struct platform_device *pdev)
1135{
1136 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
1137
1138 /* Disable all ports and interrupts */
1139 priv->wol_ports_mask = 0;
1140 bcm_sf2_sw_suspend(priv->dev->ds);
1141 dsa_unregister_switch(priv->dev->ds);
1142 bcm_sf2_mdio_unregister(priv);
1143
1144 return 0;
1145}
1146
1147static void bcm_sf2_sw_shutdown(struct platform_device *pdev)
1148{
1149 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
1150
1151 /* For a kernel about to be kexec'd we want to keep the GPHY on for a
1152 * successful MDIO bus scan to occur. If we did turn off the GPHY
1153 * before (e.g: port_disable), this will also power it back on.
1154 *
1155 * Do not rely on kexec_in_progress, just power the PHY on.
1156 */
1157 if (priv->hw_params.num_gphy == 1)
1158 bcm_sf2_gphy_enable_set(priv->dev->ds, true);
1159}
1160
1161#ifdef CONFIG_PM_SLEEP
1162static int bcm_sf2_suspend(struct device *dev)
1163{
1164 struct platform_device *pdev = to_platform_device(dev);
1165 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
1166
1167 return dsa_switch_suspend(priv->dev->ds);
1168}
1169
1170static int bcm_sf2_resume(struct device *dev)
1171{
1172 struct platform_device *pdev = to_platform_device(dev);
1173 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
1174
1175 return dsa_switch_resume(priv->dev->ds);
1176}
1177#endif /* CONFIG_PM_SLEEP */
1178
1179static SIMPLE_DEV_PM_OPS(bcm_sf2_pm_ops,
1180 bcm_sf2_suspend, bcm_sf2_resume);
1181
1182static const struct of_device_id bcm_sf2_of_match[] = {
1183 { .compatible = "brcm,bcm7445-switch-v4.0" },
1184 { /* sentinel */ },
1185};
1186MODULE_DEVICE_TABLE(of, bcm_sf2_of_match);
1187
1188static struct platform_driver bcm_sf2_driver = {
1189 .probe = bcm_sf2_sw_probe,
1190 .remove = bcm_sf2_sw_remove,
1191 .shutdown = bcm_sf2_sw_shutdown,
1192 .driver = {
1193 .name = "brcm-sf2",
1194 .of_match_table = bcm_sf2_of_match,
1195 .pm = &bcm_sf2_pm_ops,
1196 },
1197};
1198module_platform_driver(bcm_sf2_driver);
1199
1200MODULE_AUTHOR("Broadcom Corporation");
1201MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip");
1202MODULE_LICENSE("GPL");
1203MODULE_ALIAS("platform:brcm-sf2");