1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Broadcom Starfighter 2 DSA switch driver
4 *
5 * Copyright (C) 2014, Broadcom Corporation
6 */
7
8 #include <linux/list.h>
9 #include <linux/module.h>
10 #include <linux/netdevice.h>
11 #include <linux/interrupt.h>
12 #include <linux/platform_device.h>
13 #include <linux/phy.h>
14 #include <linux/phy_fixed.h>
15 #include <linux/phylink.h>
16 #include <linux/mii.h>
17 #include <linux/clk.h>
18 #include <linux/of.h>
19 #include <linux/of_irq.h>
20 #include <linux/of_address.h>
21 #include <linux/of_net.h>
22 #include <linux/of_mdio.h>
23 #include <net/dsa.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_bridge.h>
26 #include <linux/brcmphy.h>
27 #include <linux/etherdevice.h>
28 #include <linux/platform_data/b53.h>
29
30 #include "bcm_sf2.h"
31 #include "bcm_sf2_regs.h"
32 #include "b53/b53_priv.h"
33 #include "b53/b53_regs.h"
34
bcm_sf2_reg_rgmii_cntrl(struct bcm_sf2_priv * priv,int port)35 static u16 bcm_sf2_reg_rgmii_cntrl(struct bcm_sf2_priv *priv, int port)
36 {
37 switch (priv->type) {
38 case BCM4908_DEVICE_ID:
39 switch (port) {
40 case 7:
41 return REG_RGMII_11_CNTRL;
42 default:
43 break;
44 }
45 break;
46 default:
47 switch (port) {
48 case 0:
49 return REG_RGMII_0_CNTRL;
50 case 1:
51 return REG_RGMII_1_CNTRL;
52 case 2:
53 return REG_RGMII_2_CNTRL;
54 default:
55 break;
56 }
57 }
58
59 WARN_ONCE(1, "Unsupported port %d\n", port);
60
61 /* RO fallback reg */
62 return REG_SWITCH_STATUS;
63 }
64
bcm_sf2_reg_led_base(struct bcm_sf2_priv * priv,int port)65 static u16 bcm_sf2_reg_led_base(struct bcm_sf2_priv *priv, int port)
66 {
67 switch (port) {
68 case 0:
69 return REG_LED_0_CNTRL;
70 case 1:
71 return REG_LED_1_CNTRL;
72 case 2:
73 return REG_LED_2_CNTRL;
74 }
75
76 switch (priv->type) {
77 case BCM4908_DEVICE_ID:
78 switch (port) {
79 case 3:
80 return REG_LED_3_CNTRL;
81 case 7:
82 return REG_LED_4_CNTRL;
83 default:
84 break;
85 }
86 break;
87 default:
88 break;
89 }
90
91 WARN_ONCE(1, "Unsupported port %d\n", port);
92
93 /* RO fallback reg */
94 return REG_SWITCH_STATUS;
95 }
96
bcm_sf2_port_override_offset(struct bcm_sf2_priv * priv,int port)97 static u32 bcm_sf2_port_override_offset(struct bcm_sf2_priv *priv, int port)
98 {
99 switch (priv->type) {
100 case BCM4908_DEVICE_ID:
101 case BCM7445_DEVICE_ID:
102 return port == 8 ? CORE_STS_OVERRIDE_IMP :
103 CORE_STS_OVERRIDE_GMIIP_PORT(port);
104 case BCM7278_DEVICE_ID:
105 return port == 8 ? CORE_STS_OVERRIDE_IMP2 :
106 CORE_STS_OVERRIDE_GMIIP2_PORT(port);
107 default:
108 WARN_ONCE(1, "Unsupported device: %d\n", priv->type);
109 }
110
111 /* RO fallback register */
112 return REG_SWITCH_STATUS;
113 }
114
115 /* Return the number of active ports, not counting the IMP (CPU) port */
bcm_sf2_num_active_ports(struct dsa_switch * ds)116 static unsigned int bcm_sf2_num_active_ports(struct dsa_switch *ds)
117 {
118 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
119 unsigned int port, count = 0;
120
121 for (port = 0; port < ds->num_ports; port++) {
122 if (dsa_is_cpu_port(ds, port))
123 continue;
124 if (priv->port_sts[port].enabled)
125 count++;
126 }
127
128 return count;
129 }
130
bcm_sf2_recalc_clock(struct dsa_switch * ds)131 static void bcm_sf2_recalc_clock(struct dsa_switch *ds)
132 {
133 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
134 unsigned long new_rate;
135 unsigned int ports_active;
136 /* Frequenty in Mhz */
137 static const unsigned long rate_table[] = {
138 59220000,
139 60820000,
140 62500000,
141 62500000,
142 };
143
144 ports_active = bcm_sf2_num_active_ports(ds);
145 if (ports_active == 0 || !priv->clk_mdiv)
146 return;
147
148 /* If we overflow our table, just use the recommended operational
149 * frequency
150 */
151 if (ports_active > ARRAY_SIZE(rate_table))
152 new_rate = 90000000;
153 else
154 new_rate = rate_table[ports_active - 1];
155 clk_set_rate(priv->clk_mdiv, new_rate);
156 }
157
bcm_sf2_imp_setup(struct dsa_switch * ds,int port)158 static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
159 {
160 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
161 unsigned int i;
162 u32 reg;
163
164 /* Enable the port memories */
165 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
166 reg &= ~P_TXQ_PSM_VDD(port);
167 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
168
169 /* Enable forwarding */
170 core_writel(priv, SW_FWDG_EN, CORE_SWMODE);
171
172 /* Enable IMP port in dumb mode */
173 reg = core_readl(priv, CORE_SWITCH_CTRL);
174 reg |= MII_DUMB_FWDG_EN;
175 core_writel(priv, reg, CORE_SWITCH_CTRL);
176
177 /* Configure Traffic Class to QoS mapping, allow each priority to map
178 * to a different queue number
179 */
180 reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port));
181 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++)
182 reg |= i << (PRT_TO_QID_SHIFT * i);
183 core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port));
184
185 b53_brcm_hdr_setup(ds, port);
186
187 if (port == 8) {
188 /* Enable Broadcast, Multicast, Unicast forwarding to IMP port */
189 reg = core_readl(priv, CORE_IMP_CTL);
190 reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN);
191 reg &= ~(RX_DIS | TX_DIS);
192 core_writel(priv, reg, CORE_IMP_CTL);
193 } else {
194 reg = core_readl(priv, CORE_G_PCTL_PORT(port));
195 reg &= ~(RX_DIS | TX_DIS);
196 core_writel(priv, reg, CORE_G_PCTL_PORT(port));
197 }
198
199 priv->port_sts[port].enabled = true;
200 }
201
bcm_sf2_gphy_enable_set(struct dsa_switch * ds,bool enable)202 static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable)
203 {
204 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
205 u32 reg;
206
207 reg = reg_readl(priv, REG_SPHY_CNTRL);
208 if (enable) {
209 reg |= PHY_RESET;
210 reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | IDDQ_GLOBAL_PWR | CK25_DIS);
211 reg_writel(priv, reg, REG_SPHY_CNTRL);
212 udelay(21);
213 reg = reg_readl(priv, REG_SPHY_CNTRL);
214 reg &= ~PHY_RESET;
215 } else {
216 reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET;
217 reg_writel(priv, reg, REG_SPHY_CNTRL);
218 mdelay(1);
219 reg |= CK25_DIS;
220 }
221 reg_writel(priv, reg, REG_SPHY_CNTRL);
222
223 /* Use PHY-driven LED signaling */
224 if (!enable) {
225 u16 led_ctrl = bcm_sf2_reg_led_base(priv, 0);
226
227 if (priv->type == BCM7278_DEVICE_ID ||
228 priv->type == BCM7445_DEVICE_ID) {
229 reg = reg_led_readl(priv, led_ctrl, 0);
230 reg |= LED_CNTRL_SPDLNK_SRC_SEL;
231 reg_led_writel(priv, reg, led_ctrl, 0);
232 }
233 }
234 }
235
bcm_sf2_port_intr_enable(struct bcm_sf2_priv * priv,int port)236 static inline void bcm_sf2_port_intr_enable(struct bcm_sf2_priv *priv,
237 int port)
238 {
239 unsigned int off;
240
241 switch (port) {
242 case 7:
243 off = P7_IRQ_OFF;
244 break;
245 case 0:
246 /* Port 0 interrupts are located on the first bank */
247 intrl2_0_mask_clear(priv, P_IRQ_MASK(P0_IRQ_OFF));
248 return;
249 default:
250 off = P_IRQ_OFF(port);
251 break;
252 }
253
254 intrl2_1_mask_clear(priv, P_IRQ_MASK(off));
255 }
256
bcm_sf2_port_intr_disable(struct bcm_sf2_priv * priv,int port)257 static inline void bcm_sf2_port_intr_disable(struct bcm_sf2_priv *priv,
258 int port)
259 {
260 unsigned int off;
261
262 switch (port) {
263 case 7:
264 off = P7_IRQ_OFF;
265 break;
266 case 0:
267 /* Port 0 interrupts are located on the first bank */
268 intrl2_0_mask_set(priv, P_IRQ_MASK(P0_IRQ_OFF));
269 intrl2_0_writel(priv, P_IRQ_MASK(P0_IRQ_OFF), INTRL2_CPU_CLEAR);
270 return;
271 default:
272 off = P_IRQ_OFF(port);
273 break;
274 }
275
276 intrl2_1_mask_set(priv, P_IRQ_MASK(off));
277 intrl2_1_writel(priv, P_IRQ_MASK(off), INTRL2_CPU_CLEAR);
278 }
279
bcm_sf2_port_setup(struct dsa_switch * ds,int port,struct phy_device * phy)280 static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
281 struct phy_device *phy)
282 {
283 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
284 unsigned int i;
285 u32 reg;
286
287 if (!dsa_is_user_port(ds, port))
288 return 0;
289
290 priv->port_sts[port].enabled = true;
291
292 bcm_sf2_recalc_clock(ds);
293
294 /* Clear the memory power down */
295 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
296 reg &= ~P_TXQ_PSM_VDD(port);
297 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
298
299 /* Enable Broadcom tags for that port if requested */
300 if (priv->brcm_tag_mask & BIT(port))
301 b53_brcm_hdr_setup(ds, port);
302
303 /* Configure Traffic Class to QoS mapping, allow each priority to map
304 * to a different queue number
305 */
306 reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port));
307 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++)
308 reg |= i << (PRT_TO_QID_SHIFT * i);
309 core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port));
310
311 /* Re-enable the GPHY and re-apply workarounds */
312 if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) {
313 bcm_sf2_gphy_enable_set(ds, true);
314 if (phy) {
315 /* if phy_stop() has been called before, phy
316 * will be in halted state, and phy_start()
317 * will call resume.
318 *
319 * the resume path does not configure back
320 * autoneg settings, and since we hard reset
321 * the phy manually here, we need to reset the
322 * state machine also.
323 */
324 phy->state = PHY_READY;
325 phy_init_hw(phy);
326 }
327 }
328
329 /* Enable MoCA port interrupts to get notified */
330 if (port == priv->moca_port)
331 bcm_sf2_port_intr_enable(priv, port);
332
333 /* Set per-queue pause threshold to 32 */
334 core_writel(priv, 32, CORE_TXQ_THD_PAUSE_QN_PORT(port));
335
336 /* Set ACB threshold to 24 */
337 for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) {
338 reg = acb_readl(priv, ACB_QUEUE_CFG(port *
339 SF2_NUM_EGRESS_QUEUES + i));
340 reg &= ~XOFF_THRESHOLD_MASK;
341 reg |= 24;
342 acb_writel(priv, reg, ACB_QUEUE_CFG(port *
343 SF2_NUM_EGRESS_QUEUES + i));
344 }
345
346 return b53_enable_port(ds, port, phy);
347 }
348
bcm_sf2_port_disable(struct dsa_switch * ds,int port)349 static void bcm_sf2_port_disable(struct dsa_switch *ds, int port)
350 {
351 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
352 u32 reg;
353
354 /* Disable learning while in WoL mode */
355 if (priv->wol_ports_mask & (1 << port)) {
356 reg = core_readl(priv, CORE_DIS_LEARN);
357 reg |= BIT(port);
358 core_writel(priv, reg, CORE_DIS_LEARN);
359 return;
360 }
361
362 if (port == priv->moca_port)
363 bcm_sf2_port_intr_disable(priv, port);
364
365 if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1)
366 bcm_sf2_gphy_enable_set(ds, false);
367
368 b53_disable_port(ds, port);
369
370 /* Power down the port memory */
371 reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
372 reg |= P_TXQ_PSM_VDD(port);
373 core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
374
375 priv->port_sts[port].enabled = false;
376
377 bcm_sf2_recalc_clock(ds);
378 }
379
380
bcm_sf2_sw_indir_rw(struct bcm_sf2_priv * priv,int op,int addr,int regnum,u16 val)381 static int bcm_sf2_sw_indir_rw(struct bcm_sf2_priv *priv, int op, int addr,
382 int regnum, u16 val)
383 {
384 int ret = 0;
385 u32 reg;
386
387 reg = reg_readl(priv, REG_SWITCH_CNTRL);
388 reg |= MDIO_MASTER_SEL;
389 reg_writel(priv, reg, REG_SWITCH_CNTRL);
390
391 /* Page << 8 | offset */
392 reg = 0x70;
393 reg <<= 2;
394 core_writel(priv, addr, reg);
395
396 /* Page << 8 | offset */
397 reg = 0x80 << 8 | regnum << 1;
398 reg <<= 2;
399
400 if (op)
401 ret = core_readl(priv, reg);
402 else
403 core_writel(priv, val, reg);
404
405 reg = reg_readl(priv, REG_SWITCH_CNTRL);
406 reg &= ~MDIO_MASTER_SEL;
407 reg_writel(priv, reg, REG_SWITCH_CNTRL);
408
409 return ret & 0xffff;
410 }
411
bcm_sf2_sw_mdio_read(struct mii_bus * bus,int addr,int regnum)412 static int bcm_sf2_sw_mdio_read(struct mii_bus *bus, int addr, int regnum)
413 {
414 struct bcm_sf2_priv *priv = bus->priv;
415
416 /* Intercept reads from Broadcom pseudo-PHY address, else, send
417 * them to our master MDIO bus controller
418 */
419 if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
420 return bcm_sf2_sw_indir_rw(priv, 1, addr, regnum, 0);
421 else
422 return mdiobus_read_nested(priv->master_mii_bus, addr, regnum);
423 }
424
bcm_sf2_sw_mdio_write(struct mii_bus * bus,int addr,int regnum,u16 val)425 static int bcm_sf2_sw_mdio_write(struct mii_bus *bus, int addr, int regnum,
426 u16 val)
427 {
428 struct bcm_sf2_priv *priv = bus->priv;
429
430 /* Intercept writes to the Broadcom pseudo-PHY address, else,
431 * send them to our master MDIO bus controller
432 */
433 if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
434 return bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val);
435 else
436 return mdiobus_write_nested(priv->master_mii_bus, addr,
437 regnum, val);
438 }
439
bcm_sf2_switch_0_isr(int irq,void * dev_id)440 static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id)
441 {
442 struct dsa_switch *ds = dev_id;
443 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
444
445 priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
446 ~priv->irq0_mask;
447 intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
448
449 return IRQ_HANDLED;
450 }
451
bcm_sf2_switch_1_isr(int irq,void * dev_id)452 static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id)
453 {
454 struct dsa_switch *ds = dev_id;
455 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
456
457 priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
458 ~priv->irq1_mask;
459 intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR);
460
461 if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF)) {
462 priv->port_sts[7].link = true;
463 dsa_port_phylink_mac_change(ds, 7, true);
464 }
465 if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF)) {
466 priv->port_sts[7].link = false;
467 dsa_port_phylink_mac_change(ds, 7, false);
468 }
469
470 return IRQ_HANDLED;
471 }
472
bcm_sf2_sw_rst(struct bcm_sf2_priv * priv)473 static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv)
474 {
475 unsigned int timeout = 1000;
476 u32 reg;
477 int ret;
478
479 /* The watchdog reset does not work on 7278, we need to hit the
480 * "external" reset line through the reset controller.
481 */
482 if (priv->type == BCM7278_DEVICE_ID) {
483 ret = reset_control_assert(priv->rcdev);
484 if (ret)
485 return ret;
486
487 return reset_control_deassert(priv->rcdev);
488 }
489
490 reg = core_readl(priv, CORE_WATCHDOG_CTRL);
491 reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET;
492 core_writel(priv, reg, CORE_WATCHDOG_CTRL);
493
494 do {
495 reg = core_readl(priv, CORE_WATCHDOG_CTRL);
496 if (!(reg & SOFTWARE_RESET))
497 break;
498
499 usleep_range(1000, 2000);
500 } while (timeout-- > 0);
501
502 if (timeout == 0)
503 return -ETIMEDOUT;
504
505 return 0;
506 }
507
bcm_sf2_crossbar_setup(struct bcm_sf2_priv * priv)508 static void bcm_sf2_crossbar_setup(struct bcm_sf2_priv *priv)
509 {
510 struct device *dev = priv->dev->ds->dev;
511 int shift;
512 u32 mask;
513 u32 reg;
514 int i;
515
516 mask = BIT(priv->num_crossbar_int_ports) - 1;
517
518 reg = reg_readl(priv, REG_CROSSBAR);
519 switch (priv->type) {
520 case BCM4908_DEVICE_ID:
521 shift = CROSSBAR_BCM4908_INT_P7 * priv->num_crossbar_int_ports;
522 reg &= ~(mask << shift);
523 if (0) /* FIXME */
524 reg |= CROSSBAR_BCM4908_EXT_SERDES << shift;
525 else if (priv->int_phy_mask & BIT(7))
526 reg |= CROSSBAR_BCM4908_EXT_GPHY4 << shift;
527 else if (phy_interface_mode_is_rgmii(priv->port_sts[7].mode))
528 reg |= CROSSBAR_BCM4908_EXT_RGMII << shift;
529 else if (WARN(1, "Invalid port mode\n"))
530 return;
531 break;
532 default:
533 return;
534 }
535 reg_writel(priv, reg, REG_CROSSBAR);
536
537 reg = reg_readl(priv, REG_CROSSBAR);
538 for (i = 0; i < priv->num_crossbar_int_ports; i++) {
539 shift = i * priv->num_crossbar_int_ports;
540
541 dev_dbg(dev, "crossbar int port #%d - ext port #%d\n", i,
542 (reg >> shift) & mask);
543 }
544 }
545
bcm_sf2_intr_disable(struct bcm_sf2_priv * priv)546 static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv)
547 {
548 intrl2_0_mask_set(priv, 0xffffffff);
549 intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
550 intrl2_1_mask_set(priv, 0xffffffff);
551 intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
552 }
553
bcm_sf2_identify_ports(struct bcm_sf2_priv * priv,struct device_node * dn)554 static void bcm_sf2_identify_ports(struct bcm_sf2_priv *priv,
555 struct device_node *dn)
556 {
557 struct device *dev = priv->dev->ds->dev;
558 struct bcm_sf2_port_status *port_st;
559 struct device_node *port;
560 unsigned int port_num;
561 struct property *prop;
562 int err;
563
564 priv->moca_port = -1;
565
566 for_each_available_child_of_node(dn, port) {
567 if (of_property_read_u32(port, "reg", &port_num))
568 continue;
569
570 if (port_num >= DSA_MAX_PORTS) {
571 dev_err(dev, "Invalid port number %d\n", port_num);
572 continue;
573 }
574
575 port_st = &priv->port_sts[port_num];
576
577 /* Internal PHYs get assigned a specific 'phy-mode' property
578 * value: "internal" to help flag them before MDIO probing
579 * has completed, since they might be turned off at that
580 * time
581 */
582 err = of_get_phy_mode(port, &port_st->mode);
583 if (err)
584 continue;
585
586 if (port_st->mode == PHY_INTERFACE_MODE_INTERNAL)
587 priv->int_phy_mask |= 1 << port_num;
588
589 if (port_st->mode == PHY_INTERFACE_MODE_MOCA)
590 priv->moca_port = port_num;
591
592 if (of_property_read_bool(port, "brcm,use-bcm-hdr"))
593 priv->brcm_tag_mask |= 1 << port_num;
594
595 /* Ensure that port 5 is not picked up as a DSA CPU port
596 * flavour but a regular port instead. We should be using
597 * devlink to be able to set the port flavour.
598 */
599 if (port_num == 5 && priv->type == BCM7278_DEVICE_ID) {
600 prop = of_find_property(port, "ethernet", NULL);
601 if (prop)
602 of_remove_property(port, prop);
603 }
604 }
605 }
606
bcm_sf2_mdio_register(struct dsa_switch * ds)607 static int bcm_sf2_mdio_register(struct dsa_switch *ds)
608 {
609 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
610 struct device_node *dn, *child;
611 struct phy_device *phydev;
612 struct property *prop;
613 static int index;
614 int err, reg;
615
616 /* Find our integrated MDIO bus node */
617 dn = of_find_compatible_node(NULL, NULL, "brcm,unimac-mdio");
618 priv->master_mii_bus = of_mdio_find_bus(dn);
619 if (!priv->master_mii_bus) {
620 err = -EPROBE_DEFER;
621 goto err_of_node_put;
622 }
623
624 priv->user_mii_bus = mdiobus_alloc();
625 if (!priv->user_mii_bus) {
626 err = -ENOMEM;
627 goto err_put_master_mii_bus_dev;
628 }
629
630 priv->user_mii_bus->priv = priv;
631 priv->user_mii_bus->name = "sf2 user mii";
632 priv->user_mii_bus->read = bcm_sf2_sw_mdio_read;
633 priv->user_mii_bus->write = bcm_sf2_sw_mdio_write;
634 snprintf(priv->user_mii_bus->id, MII_BUS_ID_SIZE, "sf2-%d",
635 index++);
636
637 /* Include the pseudo-PHY address to divert reads towards our
638 * workaround. This is only required for 7445D0, since 7445E0
639 * disconnects the internal switch pseudo-PHY such that we can use the
640 * regular SWITCH_MDIO master controller instead.
641 *
642 * Here we flag the pseudo PHY as needing special treatment and would
643 * otherwise make all other PHY read/writes go to the master MDIO bus
644 * controller that comes with this switch backed by the "mdio-unimac"
645 * driver.
646 */
647 if (of_machine_is_compatible("brcm,bcm7445d0"))
648 priv->indir_phy_mask |= (1 << BRCM_PSEUDO_PHY_ADDR) | (1 << 0);
649 else
650 priv->indir_phy_mask = 0;
651
652 ds->phys_mii_mask = priv->indir_phy_mask;
653 ds->user_mii_bus = priv->user_mii_bus;
654 priv->user_mii_bus->parent = ds->dev->parent;
655 priv->user_mii_bus->phy_mask = ~priv->indir_phy_mask;
656
657 /* We need to make sure that of_phy_connect() will not work by
658 * removing the 'phandle' and 'linux,phandle' properties and
659 * unregister the existing PHY device that was already registered.
660 */
661 for_each_available_child_of_node(dn, child) {
662 if (of_property_read_u32(child, "reg", ®) ||
663 reg >= PHY_MAX_ADDR)
664 continue;
665
666 if (!(priv->indir_phy_mask & BIT(reg)))
667 continue;
668
669 prop = of_find_property(child, "phandle", NULL);
670 if (prop)
671 of_remove_property(child, prop);
672
673 prop = of_find_property(child, "linux,phandle", NULL);
674 if (prop)
675 of_remove_property(child, prop);
676
677 phydev = of_phy_find_device(child);
678 if (phydev) {
679 phy_device_remove(phydev);
680 phy_device_free(phydev);
681 }
682 }
683
684 err = mdiobus_register(priv->user_mii_bus);
685 if (err)
686 goto err_free_user_mii_bus;
687
688 of_node_put(dn);
689
690 return 0;
691
692 err_free_user_mii_bus:
693 mdiobus_free(priv->user_mii_bus);
694 err_put_master_mii_bus_dev:
695 put_device(&priv->master_mii_bus->dev);
696 err_of_node_put:
697 of_node_put(dn);
698 return err;
699 }
700
bcm_sf2_mdio_unregister(struct bcm_sf2_priv * priv)701 static void bcm_sf2_mdio_unregister(struct bcm_sf2_priv *priv)
702 {
703 mdiobus_unregister(priv->user_mii_bus);
704 mdiobus_free(priv->user_mii_bus);
705 put_device(&priv->master_mii_bus->dev);
706 }
707
bcm_sf2_sw_get_phy_flags(struct dsa_switch * ds,int port)708 static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port)
709 {
710 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
711
712 /* The BCM7xxx PHY driver expects to find the integrated PHY revision
713 * in bits 15:8 and the patch level in bits 7:0 which is exactly what
714 * the REG_PHY_REVISION register layout is.
715 */
716 if (priv->int_phy_mask & BIT(port))
717 return priv->hw_params.gphy_rev;
718 else
719 return PHY_BRCM_AUTO_PWRDWN_ENABLE |
720 PHY_BRCM_DIS_TXCRXC_NOENRGY |
721 PHY_BRCM_IDDQ_SUSPEND;
722 }
723
bcm_sf2_sw_get_caps(struct dsa_switch * ds,int port,struct phylink_config * config)724 static void bcm_sf2_sw_get_caps(struct dsa_switch *ds, int port,
725 struct phylink_config *config)
726 {
727 unsigned long *interfaces = config->supported_interfaces;
728 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
729
730 if (priv->int_phy_mask & BIT(port)) {
731 __set_bit(PHY_INTERFACE_MODE_INTERNAL, interfaces);
732 } else if (priv->moca_port == port) {
733 __set_bit(PHY_INTERFACE_MODE_MOCA, interfaces);
734 } else {
735 __set_bit(PHY_INTERFACE_MODE_MII, interfaces);
736 __set_bit(PHY_INTERFACE_MODE_REVMII, interfaces);
737 __set_bit(PHY_INTERFACE_MODE_GMII, interfaces);
738 phy_interface_set_rgmii(interfaces);
739 }
740
741 config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
742 MAC_10 | MAC_100 | MAC_1000;
743 }
744
bcm_sf2_sw_mac_config(struct phylink_config * config,unsigned int mode,const struct phylink_link_state * state)745 static void bcm_sf2_sw_mac_config(struct phylink_config *config,
746 unsigned int mode,
747 const struct phylink_link_state *state)
748 {
749 struct dsa_port *dp = dsa_phylink_to_port(config);
750 u32 id_mode_dis = 0, port_mode;
751 struct bcm_sf2_priv *priv;
752 u32 reg_rgmii_ctrl;
753 u32 reg;
754
755 priv = bcm_sf2_to_priv(dp->ds);
756
757 if (dp->index == core_readl(priv, CORE_IMP0_PRT_ID))
758 return;
759
760 switch (state->interface) {
761 case PHY_INTERFACE_MODE_RGMII:
762 id_mode_dis = 1;
763 fallthrough;
764 case PHY_INTERFACE_MODE_RGMII_TXID:
765 port_mode = EXT_GPHY;
766 break;
767 case PHY_INTERFACE_MODE_MII:
768 port_mode = EXT_EPHY;
769 break;
770 case PHY_INTERFACE_MODE_REVMII:
771 port_mode = EXT_REVMII;
772 break;
773 default:
774 /* Nothing required for all other PHYs: internal and MoCA */
775 return;
776 }
777
778 reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, dp->index);
779
780 /* Clear id_mode_dis bit, and the existing port mode, let
781 * RGMII_MODE_EN bet set by mac_link_{up,down}
782 */
783 reg = reg_readl(priv, reg_rgmii_ctrl);
784 reg &= ~ID_MODE_DIS;
785 reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT);
786
787 reg |= port_mode;
788 if (id_mode_dis)
789 reg |= ID_MODE_DIS;
790
791 reg_writel(priv, reg, reg_rgmii_ctrl);
792 }
793
bcm_sf2_sw_mac_link_set(struct dsa_switch * ds,int port,phy_interface_t interface,bool link)794 static void bcm_sf2_sw_mac_link_set(struct dsa_switch *ds, int port,
795 phy_interface_t interface, bool link)
796 {
797 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
798 u32 reg_rgmii_ctrl;
799 u32 reg;
800
801 if (!phy_interface_mode_is_rgmii(interface) &&
802 interface != PHY_INTERFACE_MODE_MII &&
803 interface != PHY_INTERFACE_MODE_REVMII)
804 return;
805
806 reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port);
807
808 /* If the link is down, just disable the interface to conserve power */
809 reg = reg_readl(priv, reg_rgmii_ctrl);
810 if (link)
811 reg |= RGMII_MODE_EN;
812 else
813 reg &= ~RGMII_MODE_EN;
814 reg_writel(priv, reg, reg_rgmii_ctrl);
815 }
816
bcm_sf2_sw_mac_link_down(struct phylink_config * config,unsigned int mode,phy_interface_t interface)817 static void bcm_sf2_sw_mac_link_down(struct phylink_config *config,
818 unsigned int mode,
819 phy_interface_t interface)
820 {
821 struct dsa_port *dp = dsa_phylink_to_port(config);
822 struct bcm_sf2_priv *priv;
823 int port = dp->index;
824 u32 reg, offset;
825
826 priv = bcm_sf2_to_priv(dp->ds);
827 if (priv->wol_ports_mask & BIT(port))
828 return;
829
830 offset = bcm_sf2_port_override_offset(priv, port);
831 reg = core_readl(priv, offset);
832 reg &= ~LINK_STS;
833 core_writel(priv, reg, offset);
834
835 bcm_sf2_sw_mac_link_set(dp->ds, port, interface, false);
836 }
837
bcm_sf2_sw_mac_link_up(struct phylink_config * config,struct phy_device * phydev,unsigned int mode,phy_interface_t interface,int speed,int duplex,bool tx_pause,bool rx_pause)838 static void bcm_sf2_sw_mac_link_up(struct phylink_config *config,
839 struct phy_device *phydev,
840 unsigned int mode,
841 phy_interface_t interface,
842 int speed, int duplex,
843 bool tx_pause, bool rx_pause)
844 {
845 struct dsa_port *dp = dsa_phylink_to_port(config);
846 struct bcm_sf2_priv *priv;
847 u32 reg_rgmii_ctrl = 0;
848 struct ethtool_keee *p;
849 int port = dp->index;
850 u32 reg, offset;
851
852 bcm_sf2_sw_mac_link_set(dp->ds, port, interface, true);
853
854 priv = bcm_sf2_to_priv(dp->ds);
855 offset = bcm_sf2_port_override_offset(priv, port);
856
857 if (phy_interface_mode_is_rgmii(interface) ||
858 interface == PHY_INTERFACE_MODE_MII ||
859 interface == PHY_INTERFACE_MODE_REVMII) {
860 reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port);
861 reg = reg_readl(priv, reg_rgmii_ctrl);
862 reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
863
864 if (tx_pause)
865 reg |= TX_PAUSE_EN;
866 if (rx_pause)
867 reg |= RX_PAUSE_EN;
868
869 reg_writel(priv, reg, reg_rgmii_ctrl);
870 }
871
872 reg = LINK_STS;
873 if (port == 8) {
874 if (priv->type == BCM4908_DEVICE_ID)
875 reg |= GMII_SPEED_UP_2G;
876 reg |= MII_SW_OR;
877 } else {
878 reg |= SW_OVERRIDE;
879 }
880
881 switch (speed) {
882 case SPEED_1000:
883 reg |= SPDSTS_1000 << SPEED_SHIFT;
884 break;
885 case SPEED_100:
886 reg |= SPDSTS_100 << SPEED_SHIFT;
887 break;
888 }
889
890 if (duplex == DUPLEX_FULL)
891 reg |= DUPLX_MODE;
892
893 if (tx_pause)
894 reg |= TXFLOW_CNTL;
895 if (rx_pause)
896 reg |= RXFLOW_CNTL;
897
898 core_writel(priv, reg, offset);
899
900 if (mode == MLO_AN_PHY && phydev) {
901 p = &priv->dev->ports[port].eee;
902 p->eee_enabled = b53_eee_init(dp->ds, port, phydev);
903 }
904 }
905
bcm_sf2_sw_fixed_state(struct dsa_switch * ds,int port,struct phylink_link_state * status)906 static void bcm_sf2_sw_fixed_state(struct dsa_switch *ds, int port,
907 struct phylink_link_state *status)
908 {
909 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
910
911 status->link = false;
912
913 /* MoCA port is special as we do not get link status from CORE_LNKSTS,
914 * which means that we need to force the link at the port override
915 * level to get the data to flow. We do use what the interrupt handler
916 * did determine before.
917 *
918 * For the other ports, we just force the link status, since this is
919 * a fixed PHY device.
920 */
921 if (port == priv->moca_port) {
922 status->link = priv->port_sts[port].link;
923 /* For MoCA interfaces, also force a link down notification
924 * since some version of the user-space daemon (mocad) use
925 * cmd->autoneg to force the link, which messes up the PHY
926 * state machine and make it go in PHY_FORCING state instead.
927 */
928 if (!status->link)
929 netif_carrier_off(dsa_to_port(ds, port)->user);
930 status->duplex = DUPLEX_FULL;
931 } else {
932 status->link = true;
933 }
934 }
935
bcm_sf2_enable_acb(struct dsa_switch * ds)936 static void bcm_sf2_enable_acb(struct dsa_switch *ds)
937 {
938 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
939 u32 reg;
940
941 /* Enable ACB globally */
942 reg = acb_readl(priv, ACB_CONTROL);
943 reg |= (ACB_FLUSH_MASK << ACB_FLUSH_SHIFT);
944 acb_writel(priv, reg, ACB_CONTROL);
945 reg &= ~(ACB_FLUSH_MASK << ACB_FLUSH_SHIFT);
946 reg |= ACB_EN | ACB_ALGORITHM;
947 acb_writel(priv, reg, ACB_CONTROL);
948 }
949
bcm_sf2_sw_suspend(struct dsa_switch * ds)950 static int bcm_sf2_sw_suspend(struct dsa_switch *ds)
951 {
952 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
953 unsigned int port;
954
955 bcm_sf2_intr_disable(priv);
956
957 /* Disable all ports physically present including the IMP
958 * port, the other ones have already been disabled during
959 * bcm_sf2_sw_setup
960 */
961 for (port = 0; port < ds->num_ports; port++) {
962 if (dsa_is_user_port(ds, port) || dsa_is_cpu_port(ds, port))
963 bcm_sf2_port_disable(ds, port);
964 }
965
966 if (!priv->wol_ports_mask)
967 clk_disable_unprepare(priv->clk);
968
969 return 0;
970 }
971
bcm_sf2_sw_resume(struct dsa_switch * ds)972 static int bcm_sf2_sw_resume(struct dsa_switch *ds)
973 {
974 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
975 int ret;
976
977 if (!priv->wol_ports_mask)
978 clk_prepare_enable(priv->clk);
979
980 ret = bcm_sf2_sw_rst(priv);
981 if (ret) {
982 pr_err("%s: failed to software reset switch\n", __func__);
983 return ret;
984 }
985
986 bcm_sf2_crossbar_setup(priv);
987
988 ret = bcm_sf2_cfp_resume(ds);
989 if (ret)
990 return ret;
991
992 if (priv->hw_params.num_gphy == 1)
993 bcm_sf2_gphy_enable_set(ds, true);
994
995 ds->ops->setup(ds);
996
997 return 0;
998 }
999
bcm_sf2_sw_get_wol(struct dsa_switch * ds,int port,struct ethtool_wolinfo * wol)1000 static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port,
1001 struct ethtool_wolinfo *wol)
1002 {
1003 struct net_device *p = dsa_port_to_conduit(dsa_to_port(ds, port));
1004 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1005 struct ethtool_wolinfo pwol = { };
1006
1007 /* Get the parent device WoL settings */
1008 if (p->ethtool_ops->get_wol)
1009 p->ethtool_ops->get_wol(p, &pwol);
1010
1011 /* Advertise the parent device supported settings */
1012 wol->supported = pwol.supported;
1013 memset(&wol->sopass, 0, sizeof(wol->sopass));
1014
1015 if (pwol.wolopts & WAKE_MAGICSECURE)
1016 memcpy(&wol->sopass, pwol.sopass, sizeof(wol->sopass));
1017
1018 if (priv->wol_ports_mask & (1 << port))
1019 wol->wolopts = pwol.wolopts;
1020 else
1021 wol->wolopts = 0;
1022 }
1023
bcm_sf2_sw_set_wol(struct dsa_switch * ds,int port,struct ethtool_wolinfo * wol)1024 static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port,
1025 struct ethtool_wolinfo *wol)
1026 {
1027 struct net_device *p = dsa_port_to_conduit(dsa_to_port(ds, port));
1028 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1029 s8 cpu_port = dsa_to_port(ds, port)->cpu_dp->index;
1030 struct ethtool_wolinfo pwol = { };
1031
1032 if (p->ethtool_ops->get_wol)
1033 p->ethtool_ops->get_wol(p, &pwol);
1034 if (wol->wolopts & ~pwol.supported)
1035 return -EINVAL;
1036
1037 if (wol->wolopts)
1038 priv->wol_ports_mask |= (1 << port);
1039 else
1040 priv->wol_ports_mask &= ~(1 << port);
1041
1042 /* If we have at least one port enabled, make sure the CPU port
1043 * is also enabled. If the CPU port is the last one enabled, we disable
1044 * it since this configuration does not make sense.
1045 */
1046 if (priv->wol_ports_mask && priv->wol_ports_mask != (1 << cpu_port))
1047 priv->wol_ports_mask |= (1 << cpu_port);
1048 else
1049 priv->wol_ports_mask &= ~(1 << cpu_port);
1050
1051 return p->ethtool_ops->set_wol(p, wol);
1052 }
1053
bcm_sf2_sw_setup(struct dsa_switch * ds)1054 static int bcm_sf2_sw_setup(struct dsa_switch *ds)
1055 {
1056 struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
1057 unsigned int port;
1058
1059 /* Enable all valid ports and disable those unused */
1060 for (port = 0; port < priv->hw_params.num_ports; port++) {
1061 /* IMP port receives special treatment */
1062 if (dsa_is_user_port(ds, port))
1063 bcm_sf2_port_setup(ds, port, NULL);
1064 else if (dsa_is_cpu_port(ds, port))
1065 bcm_sf2_imp_setup(ds, port);
1066 else
1067 bcm_sf2_port_disable(ds, port);
1068 }
1069
1070 b53_configure_vlan(ds);
1071 bcm_sf2_enable_acb(ds);
1072
1073 return b53_setup_devlink_resources(ds);
1074 }
1075
bcm_sf2_sw_teardown(struct dsa_switch * ds)1076 static void bcm_sf2_sw_teardown(struct dsa_switch *ds)
1077 {
1078 dsa_devlink_resources_unregister(ds);
1079 }
1080
1081 /* The SWITCH_CORE register space is managed by b53 but operates on a page +
1082 * register basis so we need to translate that into an address that the
1083 * bus-glue understands.
1084 */
1085 #define SF2_PAGE_REG_MKADDR(page, reg) ((page) << 10 | (reg) << 2)
1086
bcm_sf2_core_read8(struct b53_device * dev,u8 page,u8 reg,u8 * val)1087 static int bcm_sf2_core_read8(struct b53_device *dev, u8 page, u8 reg,
1088 u8 *val)
1089 {
1090 struct bcm_sf2_priv *priv = dev->priv;
1091
1092 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
1093
1094 return 0;
1095 }
1096
bcm_sf2_core_read16(struct b53_device * dev,u8 page,u8 reg,u16 * val)1097 static int bcm_sf2_core_read16(struct b53_device *dev, u8 page, u8 reg,
1098 u16 *val)
1099 {
1100 struct bcm_sf2_priv *priv = dev->priv;
1101
1102 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
1103
1104 return 0;
1105 }
1106
bcm_sf2_core_read32(struct b53_device * dev,u8 page,u8 reg,u32 * val)1107 static int bcm_sf2_core_read32(struct b53_device *dev, u8 page, u8 reg,
1108 u32 *val)
1109 {
1110 struct bcm_sf2_priv *priv = dev->priv;
1111
1112 *val = core_readl(priv, SF2_PAGE_REG_MKADDR(page, reg));
1113
1114 return 0;
1115 }
1116
bcm_sf2_core_read64(struct b53_device * dev,u8 page,u8 reg,u64 * val)1117 static int bcm_sf2_core_read64(struct b53_device *dev, u8 page, u8 reg,
1118 u64 *val)
1119 {
1120 struct bcm_sf2_priv *priv = dev->priv;
1121
1122 *val = core_readq(priv, SF2_PAGE_REG_MKADDR(page, reg));
1123
1124 return 0;
1125 }
1126
bcm_sf2_core_write8(struct b53_device * dev,u8 page,u8 reg,u8 value)1127 static int bcm_sf2_core_write8(struct b53_device *dev, u8 page, u8 reg,
1128 u8 value)
1129 {
1130 struct bcm_sf2_priv *priv = dev->priv;
1131
1132 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
1133
1134 return 0;
1135 }
1136
bcm_sf2_core_write16(struct b53_device * dev,u8 page,u8 reg,u16 value)1137 static int bcm_sf2_core_write16(struct b53_device *dev, u8 page, u8 reg,
1138 u16 value)
1139 {
1140 struct bcm_sf2_priv *priv = dev->priv;
1141
1142 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
1143
1144 return 0;
1145 }
1146
bcm_sf2_core_write32(struct b53_device * dev,u8 page,u8 reg,u32 value)1147 static int bcm_sf2_core_write32(struct b53_device *dev, u8 page, u8 reg,
1148 u32 value)
1149 {
1150 struct bcm_sf2_priv *priv = dev->priv;
1151
1152 core_writel(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
1153
1154 return 0;
1155 }
1156
bcm_sf2_core_write64(struct b53_device * dev,u8 page,u8 reg,u64 value)1157 static int bcm_sf2_core_write64(struct b53_device *dev, u8 page, u8 reg,
1158 u64 value)
1159 {
1160 struct bcm_sf2_priv *priv = dev->priv;
1161
1162 core_writeq(priv, value, SF2_PAGE_REG_MKADDR(page, reg));
1163
1164 return 0;
1165 }
1166
1167 static const struct b53_io_ops bcm_sf2_io_ops = {
1168 .read8 = bcm_sf2_core_read8,
1169 .read16 = bcm_sf2_core_read16,
1170 .read32 = bcm_sf2_core_read32,
1171 .read48 = bcm_sf2_core_read64,
1172 .read64 = bcm_sf2_core_read64,
1173 .write8 = bcm_sf2_core_write8,
1174 .write16 = bcm_sf2_core_write16,
1175 .write32 = bcm_sf2_core_write32,
1176 .write48 = bcm_sf2_core_write64,
1177 .write64 = bcm_sf2_core_write64,
1178 };
1179
bcm_sf2_sw_get_strings(struct dsa_switch * ds,int port,u32 stringset,uint8_t * data)1180 static void bcm_sf2_sw_get_strings(struct dsa_switch *ds, int port,
1181 u32 stringset, uint8_t *data)
1182 {
1183 int cnt = b53_get_sset_count(ds, port, stringset);
1184
1185 b53_get_strings(ds, port, stringset, data);
1186 bcm_sf2_cfp_get_strings(ds, port, stringset,
1187 data + cnt * ETH_GSTRING_LEN);
1188 }
1189
bcm_sf2_sw_get_ethtool_stats(struct dsa_switch * ds,int port,uint64_t * data)1190 static void bcm_sf2_sw_get_ethtool_stats(struct dsa_switch *ds, int port,
1191 uint64_t *data)
1192 {
1193 int cnt = b53_get_sset_count(ds, port, ETH_SS_STATS);
1194
1195 b53_get_ethtool_stats(ds, port, data);
1196 bcm_sf2_cfp_get_ethtool_stats(ds, port, data + cnt);
1197 }
1198
bcm_sf2_sw_get_sset_count(struct dsa_switch * ds,int port,int sset)1199 static int bcm_sf2_sw_get_sset_count(struct dsa_switch *ds, int port,
1200 int sset)
1201 {
1202 int cnt = b53_get_sset_count(ds, port, sset);
1203
1204 if (cnt < 0)
1205 return cnt;
1206
1207 cnt += bcm_sf2_cfp_get_sset_count(ds, port, sset);
1208
1209 return cnt;
1210 }
1211
1212 static const struct phylink_mac_ops bcm_sf2_phylink_mac_ops = {
1213 .mac_config = bcm_sf2_sw_mac_config,
1214 .mac_link_down = bcm_sf2_sw_mac_link_down,
1215 .mac_link_up = bcm_sf2_sw_mac_link_up,
1216 };
1217
1218 static const struct dsa_switch_ops bcm_sf2_ops = {
1219 .get_tag_protocol = b53_get_tag_protocol,
1220 .setup = bcm_sf2_sw_setup,
1221 .teardown = bcm_sf2_sw_teardown,
1222 .get_strings = bcm_sf2_sw_get_strings,
1223 .get_ethtool_stats = bcm_sf2_sw_get_ethtool_stats,
1224 .get_sset_count = bcm_sf2_sw_get_sset_count,
1225 .get_ethtool_phy_stats = b53_get_ethtool_phy_stats,
1226 .get_phy_flags = bcm_sf2_sw_get_phy_flags,
1227 .phylink_get_caps = bcm_sf2_sw_get_caps,
1228 .phylink_fixed_state = bcm_sf2_sw_fixed_state,
1229 .suspend = bcm_sf2_sw_suspend,
1230 .resume = bcm_sf2_sw_resume,
1231 .get_wol = bcm_sf2_sw_get_wol,
1232 .set_wol = bcm_sf2_sw_set_wol,
1233 .port_enable = bcm_sf2_port_setup,
1234 .port_disable = bcm_sf2_port_disable,
1235 .get_mac_eee = b53_get_mac_eee,
1236 .set_mac_eee = b53_set_mac_eee,
1237 .port_bridge_join = b53_br_join,
1238 .port_bridge_leave = b53_br_leave,
1239 .port_pre_bridge_flags = b53_br_flags_pre,
1240 .port_bridge_flags = b53_br_flags,
1241 .port_stp_state_set = b53_br_set_stp_state,
1242 .port_fast_age = b53_br_fast_age,
1243 .port_vlan_filtering = b53_vlan_filtering,
1244 .port_vlan_add = b53_vlan_add,
1245 .port_vlan_del = b53_vlan_del,
1246 .port_fdb_dump = b53_fdb_dump,
1247 .port_fdb_add = b53_fdb_add,
1248 .port_fdb_del = b53_fdb_del,
1249 .get_rxnfc = bcm_sf2_get_rxnfc,
1250 .set_rxnfc = bcm_sf2_set_rxnfc,
1251 .port_mirror_add = b53_mirror_add,
1252 .port_mirror_del = b53_mirror_del,
1253 .port_mdb_add = b53_mdb_add,
1254 .port_mdb_del = b53_mdb_del,
1255 };
1256
1257 struct bcm_sf2_of_data {
1258 u32 type;
1259 const u16 *reg_offsets;
1260 unsigned int core_reg_align;
1261 unsigned int num_cfp_rules;
1262 unsigned int num_crossbar_int_ports;
1263 };
1264
1265 static const u16 bcm_sf2_4908_reg_offsets[] = {
1266 [REG_SWITCH_CNTRL] = 0x00,
1267 [REG_SWITCH_STATUS] = 0x04,
1268 [REG_DIR_DATA_WRITE] = 0x08,
1269 [REG_DIR_DATA_READ] = 0x0c,
1270 [REG_SWITCH_REVISION] = 0x10,
1271 [REG_PHY_REVISION] = 0x14,
1272 [REG_SPHY_CNTRL] = 0x24,
1273 [REG_CROSSBAR] = 0xc8,
1274 [REG_RGMII_11_CNTRL] = 0x014c,
1275 [REG_LED_0_CNTRL] = 0x40,
1276 [REG_LED_1_CNTRL] = 0x4c,
1277 [REG_LED_2_CNTRL] = 0x58,
1278 [REG_LED_3_CNTRL] = 0x64,
1279 [REG_LED_4_CNTRL] = 0x88,
1280 [REG_LED_5_CNTRL] = 0xa0,
1281 [REG_LED_AGGREGATE_CTRL] = 0xb8,
1282
1283 };
1284
1285 static const struct bcm_sf2_of_data bcm_sf2_4908_data = {
1286 .type = BCM4908_DEVICE_ID,
1287 .core_reg_align = 0,
1288 .reg_offsets = bcm_sf2_4908_reg_offsets,
1289 .num_cfp_rules = 256,
1290 .num_crossbar_int_ports = 2,
1291 };
1292
1293 /* Register offsets for the SWITCH_REG_* block */
1294 static const u16 bcm_sf2_7445_reg_offsets[] = {
1295 [REG_SWITCH_CNTRL] = 0x00,
1296 [REG_SWITCH_STATUS] = 0x04,
1297 [REG_DIR_DATA_WRITE] = 0x08,
1298 [REG_DIR_DATA_READ] = 0x0C,
1299 [REG_SWITCH_REVISION] = 0x18,
1300 [REG_PHY_REVISION] = 0x1C,
1301 [REG_SPHY_CNTRL] = 0x2C,
1302 [REG_RGMII_0_CNTRL] = 0x34,
1303 [REG_RGMII_1_CNTRL] = 0x40,
1304 [REG_RGMII_2_CNTRL] = 0x4c,
1305 [REG_LED_0_CNTRL] = 0x90,
1306 [REG_LED_1_CNTRL] = 0x94,
1307 [REG_LED_2_CNTRL] = 0x98,
1308 };
1309
1310 static const struct bcm_sf2_of_data bcm_sf2_7445_data = {
1311 .type = BCM7445_DEVICE_ID,
1312 .core_reg_align = 0,
1313 .reg_offsets = bcm_sf2_7445_reg_offsets,
1314 .num_cfp_rules = 256,
1315 };
1316
1317 static const u16 bcm_sf2_7278_reg_offsets[] = {
1318 [REG_SWITCH_CNTRL] = 0x00,
1319 [REG_SWITCH_STATUS] = 0x04,
1320 [REG_DIR_DATA_WRITE] = 0x08,
1321 [REG_DIR_DATA_READ] = 0x0c,
1322 [REG_SWITCH_REVISION] = 0x10,
1323 [REG_PHY_REVISION] = 0x14,
1324 [REG_SPHY_CNTRL] = 0x24,
1325 [REG_RGMII_0_CNTRL] = 0xe0,
1326 [REG_RGMII_1_CNTRL] = 0xec,
1327 [REG_RGMII_2_CNTRL] = 0xf8,
1328 [REG_LED_0_CNTRL] = 0x40,
1329 [REG_LED_1_CNTRL] = 0x4c,
1330 [REG_LED_2_CNTRL] = 0x58,
1331 };
1332
1333 static const struct bcm_sf2_of_data bcm_sf2_7278_data = {
1334 .type = BCM7278_DEVICE_ID,
1335 .core_reg_align = 1,
1336 .reg_offsets = bcm_sf2_7278_reg_offsets,
1337 .num_cfp_rules = 128,
1338 };
1339
1340 static const struct of_device_id bcm_sf2_of_match[] = {
1341 { .compatible = "brcm,bcm4908-switch",
1342 .data = &bcm_sf2_4908_data
1343 },
1344 { .compatible = "brcm,bcm7445-switch-v4.0",
1345 .data = &bcm_sf2_7445_data
1346 },
1347 { .compatible = "brcm,bcm7278-switch-v4.0",
1348 .data = &bcm_sf2_7278_data
1349 },
1350 { .compatible = "brcm,bcm7278-switch-v4.8",
1351 .data = &bcm_sf2_7278_data
1352 },
1353 { /* sentinel */ },
1354 };
1355 MODULE_DEVICE_TABLE(of, bcm_sf2_of_match);
1356
bcm_sf2_sw_probe(struct platform_device * pdev)1357 static int bcm_sf2_sw_probe(struct platform_device *pdev)
1358 {
1359 const char *reg_names[BCM_SF2_REGS_NUM] = BCM_SF2_REGS_NAME;
1360 struct device_node *dn = pdev->dev.of_node;
1361 const struct of_device_id *of_id = NULL;
1362 const struct bcm_sf2_of_data *data;
1363 struct b53_platform_data *pdata;
1364 struct dsa_switch_ops *ops;
1365 struct device_node *ports;
1366 struct bcm_sf2_priv *priv;
1367 struct b53_device *dev;
1368 struct dsa_switch *ds;
1369 void __iomem **base;
1370 unsigned int i;
1371 u32 reg, rev;
1372 int ret;
1373
1374 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1375 if (!priv)
1376 return -ENOMEM;
1377
1378 ops = devm_kzalloc(&pdev->dev, sizeof(*ops), GFP_KERNEL);
1379 if (!ops)
1380 return -ENOMEM;
1381
1382 dev = b53_switch_alloc(&pdev->dev, &bcm_sf2_io_ops, priv);
1383 if (!dev)
1384 return -ENOMEM;
1385
1386 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
1387 if (!pdata)
1388 return -ENOMEM;
1389
1390 of_id = of_match_node(bcm_sf2_of_match, dn);
1391 if (!of_id || !of_id->data)
1392 return -EINVAL;
1393
1394 data = of_id->data;
1395
1396 /* Set SWITCH_REG register offsets and SWITCH_CORE align factor */
1397 priv->type = data->type;
1398 priv->reg_offsets = data->reg_offsets;
1399 priv->core_reg_align = data->core_reg_align;
1400 priv->num_cfp_rules = data->num_cfp_rules;
1401 priv->num_crossbar_int_ports = data->num_crossbar_int_ports;
1402
1403 priv->rcdev = devm_reset_control_get_optional_exclusive(&pdev->dev,
1404 "switch");
1405 if (IS_ERR(priv->rcdev))
1406 return PTR_ERR(priv->rcdev);
1407
1408 /* Auto-detection using standard registers will not work, so
1409 * provide an indication of what kind of device we are for
1410 * b53_common to work with
1411 */
1412 pdata->chip_id = priv->type;
1413 dev->pdata = pdata;
1414
1415 priv->dev = dev;
1416 ds = dev->ds;
1417 ds->ops = &bcm_sf2_ops;
1418 ds->phylink_mac_ops = &bcm_sf2_phylink_mac_ops;
1419
1420 /* Advertise the 8 egress queues */
1421 ds->num_tx_queues = SF2_NUM_EGRESS_QUEUES;
1422
1423 dev_set_drvdata(&pdev->dev, priv);
1424
1425 spin_lock_init(&priv->indir_lock);
1426 mutex_init(&priv->cfp.lock);
1427 INIT_LIST_HEAD(&priv->cfp.rules_list);
1428
1429 /* CFP rule #0 cannot be used for specific classifications, flag it as
1430 * permanently used
1431 */
1432 set_bit(0, priv->cfp.used);
1433 set_bit(0, priv->cfp.unique);
1434
1435 /* Balance of_node_put() done by of_find_node_by_name() */
1436 of_node_get(dn);
1437 ports = of_find_node_by_name(dn, "ports");
1438 if (ports) {
1439 bcm_sf2_identify_ports(priv, ports);
1440 of_node_put(ports);
1441 }
1442
1443 priv->irq0 = irq_of_parse_and_map(dn, 0);
1444 priv->irq1 = irq_of_parse_and_map(dn, 1);
1445
1446 base = &priv->core;
1447 for (i = 0; i < BCM_SF2_REGS_NUM; i++) {
1448 *base = devm_platform_ioremap_resource(pdev, i);
1449 if (IS_ERR(*base)) {
1450 pr_err("unable to find register: %s\n", reg_names[i]);
1451 return PTR_ERR(*base);
1452 }
1453 base++;
1454 }
1455
1456 priv->clk = devm_clk_get_optional(&pdev->dev, "sw_switch");
1457 if (IS_ERR(priv->clk))
1458 return PTR_ERR(priv->clk);
1459
1460 ret = clk_prepare_enable(priv->clk);
1461 if (ret)
1462 return ret;
1463
1464 priv->clk_mdiv = devm_clk_get_optional(&pdev->dev, "sw_switch_mdiv");
1465 if (IS_ERR(priv->clk_mdiv)) {
1466 ret = PTR_ERR(priv->clk_mdiv);
1467 goto out_clk;
1468 }
1469
1470 ret = clk_prepare_enable(priv->clk_mdiv);
1471 if (ret)
1472 goto out_clk;
1473
1474 ret = bcm_sf2_sw_rst(priv);
1475 if (ret) {
1476 pr_err("unable to software reset switch: %d\n", ret);
1477 goto out_clk_mdiv;
1478 }
1479
1480 bcm_sf2_crossbar_setup(priv);
1481
1482 bcm_sf2_gphy_enable_set(priv->dev->ds, true);
1483
1484 ret = bcm_sf2_mdio_register(ds);
1485 if (ret) {
1486 pr_err("failed to register MDIO bus\n");
1487 goto out_clk_mdiv;
1488 }
1489
1490 bcm_sf2_gphy_enable_set(priv->dev->ds, false);
1491
1492 ret = bcm_sf2_cfp_rst(priv);
1493 if (ret) {
1494 pr_err("failed to reset CFP\n");
1495 goto out_mdio;
1496 }
1497
1498 /* Disable all interrupts and request them */
1499 bcm_sf2_intr_disable(priv);
1500
1501 ret = devm_request_irq(&pdev->dev, priv->irq0, bcm_sf2_switch_0_isr, 0,
1502 "switch_0", ds);
1503 if (ret < 0) {
1504 pr_err("failed to request switch_0 IRQ\n");
1505 goto out_mdio;
1506 }
1507
1508 ret = devm_request_irq(&pdev->dev, priv->irq1, bcm_sf2_switch_1_isr, 0,
1509 "switch_1", ds);
1510 if (ret < 0) {
1511 pr_err("failed to request switch_1 IRQ\n");
1512 goto out_mdio;
1513 }
1514
1515 /* Reset the MIB counters */
1516 reg = core_readl(priv, CORE_GMNCFGCFG);
1517 reg |= RST_MIB_CNT;
1518 core_writel(priv, reg, CORE_GMNCFGCFG);
1519 reg &= ~RST_MIB_CNT;
1520 core_writel(priv, reg, CORE_GMNCFGCFG);
1521
1522 /* Get the maximum number of ports for this switch */
1523 priv->hw_params.num_ports = core_readl(priv, CORE_IMP0_PRT_ID) + 1;
1524 if (priv->hw_params.num_ports > DSA_MAX_PORTS)
1525 priv->hw_params.num_ports = DSA_MAX_PORTS;
1526
1527 /* Assume a single GPHY setup if we can't read that property */
1528 if (of_property_read_u32(dn, "brcm,num-gphy",
1529 &priv->hw_params.num_gphy))
1530 priv->hw_params.num_gphy = 1;
1531
1532 rev = reg_readl(priv, REG_SWITCH_REVISION);
1533 priv->hw_params.top_rev = (rev >> SWITCH_TOP_REV_SHIFT) &
1534 SWITCH_TOP_REV_MASK;
1535 priv->hw_params.core_rev = (rev & SF2_REV_MASK);
1536
1537 rev = reg_readl(priv, REG_PHY_REVISION);
1538 priv->hw_params.gphy_rev = rev & PHY_REVISION_MASK;
1539
1540 ret = b53_switch_register(dev);
1541 if (ret)
1542 goto out_mdio;
1543
1544 dev_info(&pdev->dev,
1545 "Starfighter 2 top: %x.%02x, core: %x.%02x, IRQs: %d, %d\n",
1546 priv->hw_params.top_rev >> 8, priv->hw_params.top_rev & 0xff,
1547 priv->hw_params.core_rev >> 8, priv->hw_params.core_rev & 0xff,
1548 priv->irq0, priv->irq1);
1549
1550 return 0;
1551
1552 out_mdio:
1553 bcm_sf2_mdio_unregister(priv);
1554 out_clk_mdiv:
1555 clk_disable_unprepare(priv->clk_mdiv);
1556 out_clk:
1557 clk_disable_unprepare(priv->clk);
1558 return ret;
1559 }
1560
bcm_sf2_sw_remove(struct platform_device * pdev)1561 static void bcm_sf2_sw_remove(struct platform_device *pdev)
1562 {
1563 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
1564
1565 if (!priv)
1566 return;
1567
1568 priv->wol_ports_mask = 0;
1569 /* Disable interrupts */
1570 bcm_sf2_intr_disable(priv);
1571 dsa_unregister_switch(priv->dev->ds);
1572 bcm_sf2_cfp_exit(priv->dev->ds);
1573 bcm_sf2_mdio_unregister(priv);
1574 clk_disable_unprepare(priv->clk_mdiv);
1575 clk_disable_unprepare(priv->clk);
1576 if (priv->type == BCM7278_DEVICE_ID)
1577 reset_control_assert(priv->rcdev);
1578 }
1579
bcm_sf2_sw_shutdown(struct platform_device * pdev)1580 static void bcm_sf2_sw_shutdown(struct platform_device *pdev)
1581 {
1582 struct bcm_sf2_priv *priv = platform_get_drvdata(pdev);
1583
1584 if (!priv)
1585 return;
1586
1587 /* For a kernel about to be kexec'd we want to keep the GPHY on for a
1588 * successful MDIO bus scan to occur. If we did turn off the GPHY
1589 * before (e.g: port_disable), this will also power it back on.
1590 *
1591 * Do not rely on kexec_in_progress, just power the PHY on.
1592 */
1593 if (priv->hw_params.num_gphy == 1)
1594 bcm_sf2_gphy_enable_set(priv->dev->ds, true);
1595
1596 dsa_switch_shutdown(priv->dev->ds);
1597
1598 platform_set_drvdata(pdev, NULL);
1599 }
1600
1601 #ifdef CONFIG_PM_SLEEP
bcm_sf2_suspend(struct device * dev)1602 static int bcm_sf2_suspend(struct device *dev)
1603 {
1604 struct bcm_sf2_priv *priv = dev_get_drvdata(dev);
1605
1606 return dsa_switch_suspend(priv->dev->ds);
1607 }
1608
bcm_sf2_resume(struct device * dev)1609 static int bcm_sf2_resume(struct device *dev)
1610 {
1611 struct bcm_sf2_priv *priv = dev_get_drvdata(dev);
1612
1613 return dsa_switch_resume(priv->dev->ds);
1614 }
1615 #endif /* CONFIG_PM_SLEEP */
1616
1617 static SIMPLE_DEV_PM_OPS(bcm_sf2_pm_ops,
1618 bcm_sf2_suspend, bcm_sf2_resume);
1619
1620
1621 static struct platform_driver bcm_sf2_driver = {
1622 .probe = bcm_sf2_sw_probe,
1623 .remove_new = bcm_sf2_sw_remove,
1624 .shutdown = bcm_sf2_sw_shutdown,
1625 .driver = {
1626 .name = "brcm-sf2",
1627 .of_match_table = bcm_sf2_of_match,
1628 .pm = &bcm_sf2_pm_ops,
1629 },
1630 };
1631 module_platform_driver(bcm_sf2_driver);
1632
1633 MODULE_AUTHOR("Broadcom Corporation");
1634 MODULE_DESCRIPTION("Driver for Broadcom Starfighter 2 ethernet switch chip");
1635 MODULE_LICENSE("GPL");
1636 MODULE_ALIAS("platform:brcm-sf2");
1637