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8#include <linux/acpi.h>
9#include <linux/types.h>
10#include <linux/delay.h>
11#include <linux/wait.h>
12#include <linux/mii.h>
13#include <linux/ethtool.h>
14#include <linux/bitops.h>
15#include <linux/netdevice.h>
16#include <linux/platform_device.h>
17#include <linux/phy.h>
18#include <linux/phy_fixed.h>
19#include <linux/brcmphy.h>
20#include <linux/of.h>
21#include <linux/of_net.h>
22#include <linux/of_mdio.h>
23#include <linux/platform_data/bcmgenet.h>
24#include <linux/platform_data/mdio-bcm-unimac.h>
25
26#include "bcmgenet.h"
27
28static void bcmgenet_mac_config(struct net_device *dev)
29{
30 struct bcmgenet_priv *priv = netdev_priv(dev);
31 struct phy_device *phydev = dev->phydev;
32 u32 reg, cmd_bits = 0;
33
34
35 if (phydev->speed == SPEED_1000)
36 cmd_bits = CMD_SPEED_1000;
37 else if (phydev->speed == SPEED_100)
38 cmd_bits = CMD_SPEED_100;
39 else
40 cmd_bits = CMD_SPEED_10;
41 cmd_bits <<= CMD_SPEED_SHIFT;
42
43
44 if (phydev->duplex != DUPLEX_FULL) {
45 cmd_bits |= CMD_HD_EN |
46 CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE;
47 } else {
48
49 if (priv->autoneg_pause) {
50 bool tx_pause = 0, rx_pause = 0;
51
52 if (phydev->autoneg)
53 phy_get_pause(phydev, &tx_pause, &rx_pause);
54
55 if (!tx_pause)
56 cmd_bits |= CMD_TX_PAUSE_IGNORE;
57 if (!rx_pause)
58 cmd_bits |= CMD_RX_PAUSE_IGNORE;
59 }
60
61
62 if (!priv->rx_pause)
63 cmd_bits |= CMD_RX_PAUSE_IGNORE;
64 if (!priv->tx_pause)
65 cmd_bits |= CMD_TX_PAUSE_IGNORE;
66 }
67
68
69
70
71
72
73
74 reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL);
75 reg &= ~OOB_DISABLE;
76 reg |= RGMII_LINK;
77 bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL);
78
79 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
80 reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) |
81 CMD_HD_EN |
82 CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE);
83 reg |= cmd_bits;
84 if (reg & CMD_SW_RESET) {
85 reg &= ~CMD_SW_RESET;
86 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
87 udelay(2);
88 reg |= CMD_TX_EN | CMD_RX_EN;
89 }
90 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
91}
92
93
94
95
96void bcmgenet_mii_setup(struct net_device *dev)
97{
98 struct phy_device *phydev = dev->phydev;
99
100 if (phydev->link)
101 bcmgenet_mac_config(dev);
102 phy_print_status(phydev);
103}
104
105
106static int bcmgenet_fixed_phy_link_update(struct net_device *dev,
107 struct fixed_phy_status *status)
108{
109 struct bcmgenet_priv *priv;
110 u32 reg;
111
112 if (dev && dev->phydev && status) {
113 priv = netdev_priv(dev);
114 reg = bcmgenet_umac_readl(priv, UMAC_MODE);
115 status->link = !!(reg & MODE_LINK_STATUS);
116 }
117
118 return 0;
119}
120
121void bcmgenet_phy_pause_set(struct net_device *dev, bool rx, bool tx)
122{
123 struct phy_device *phydev = dev->phydev;
124
125 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->advertising, rx);
126 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->advertising,
127 rx | tx);
128 phy_start_aneg(phydev);
129
130 mutex_lock(&phydev->lock);
131 if (phydev->link)
132 bcmgenet_mac_config(dev);
133 mutex_unlock(&phydev->lock);
134}
135
136void bcmgenet_phy_power_set(struct net_device *dev, bool enable)
137{
138 struct bcmgenet_priv *priv = netdev_priv(dev);
139 u32 reg = 0;
140
141
142 if (GENET_IS_V4(priv) || priv->ephy_16nm) {
143 reg = bcmgenet_ext_readl(priv, EXT_GPHY_CTRL);
144 if (enable) {
145 reg &= ~EXT_CK25_DIS;
146 bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
147 mdelay(1);
148
149 reg &= ~(EXT_CFG_IDDQ_BIAS | EXT_CFG_PWR_DOWN |
150 EXT_CFG_IDDQ_GLOBAL_PWR);
151 reg |= EXT_GPHY_RESET;
152 bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
153 mdelay(1);
154
155 reg &= ~EXT_GPHY_RESET;
156 } else {
157 reg |= EXT_CFG_IDDQ_BIAS | EXT_CFG_PWR_DOWN |
158 EXT_GPHY_RESET | EXT_CFG_IDDQ_GLOBAL_PWR;
159 bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
160 mdelay(1);
161 reg |= EXT_CK25_DIS;
162 }
163 bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL);
164 udelay(60);
165 } else {
166 mdelay(1);
167 }
168}
169
170static void bcmgenet_moca_phy_setup(struct bcmgenet_priv *priv)
171{
172 u32 reg;
173
174 if (!GENET_IS_V5(priv)) {
175
176 reg = bcmgenet_sys_readl(priv, SYS_PORT_CTRL);
177 reg |= LED_ACT_SOURCE_MAC;
178 bcmgenet_sys_writel(priv, reg, SYS_PORT_CTRL);
179 }
180
181 if (priv->hw_params->flags & GENET_HAS_MOCA_LINK_DET)
182 fixed_phy_set_link_update(priv->dev->phydev,
183 bcmgenet_fixed_phy_link_update);
184}
185
186int bcmgenet_mii_config(struct net_device *dev, bool init)
187{
188 struct bcmgenet_priv *priv = netdev_priv(dev);
189 struct phy_device *phydev = dev->phydev;
190 struct device *kdev = &priv->pdev->dev;
191 const char *phy_name = NULL;
192 u32 id_mode_dis = 0;
193 u32 port_ctrl;
194 u32 reg;
195
196 switch (priv->phy_interface) {
197 case PHY_INTERFACE_MODE_INTERNAL:
198 phy_name = "internal PHY";
199 fallthrough;
200 case PHY_INTERFACE_MODE_MOCA:
201
202
203
204
205
206 if (GENET_IS_V4(priv))
207 port_ctrl = PORT_MODE_INT_GPHY;
208 else
209 port_ctrl = PORT_MODE_INT_EPHY;
210
211 if (!phy_name) {
212 phy_name = "MoCA";
213 bcmgenet_moca_phy_setup(priv);
214 }
215 break;
216
217 case PHY_INTERFACE_MODE_MII:
218 phy_name = "external MII";
219 phy_set_max_speed(phydev, SPEED_100);
220 port_ctrl = PORT_MODE_EXT_EPHY;
221 break;
222
223 case PHY_INTERFACE_MODE_REVMII:
224 phy_name = "external RvMII";
225
226
227
228
229
230 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
231 dev->phydev->supported))
232 port_ctrl = PORT_MODE_EXT_RVMII_50;
233 else
234 port_ctrl = PORT_MODE_EXT_RVMII_25;
235 break;
236
237 case PHY_INTERFACE_MODE_RGMII:
238
239
240
241
242
243 phy_name = "external RGMII (no delay)";
244 id_mode_dis = BIT(16);
245 port_ctrl = PORT_MODE_EXT_GPHY;
246 break;
247
248 case PHY_INTERFACE_MODE_RGMII_TXID:
249
250 phy_name = "external RGMII (TX delay)";
251 port_ctrl = PORT_MODE_EXT_GPHY;
252 break;
253
254 case PHY_INTERFACE_MODE_RGMII_RXID:
255 phy_name = "external RGMII (RX delay)";
256 port_ctrl = PORT_MODE_EXT_GPHY;
257 break;
258 default:
259 dev_err(kdev, "unknown phy mode: %d\n", priv->phy_interface);
260 return -EINVAL;
261 }
262
263 bcmgenet_sys_writel(priv, port_ctrl, SYS_PORT_CTRL);
264
265 priv->ext_phy = !priv->internal_phy &&
266 (priv->phy_interface != PHY_INTERFACE_MODE_MOCA);
267
268
269
270
271 if (priv->ext_phy) {
272 reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL);
273 reg &= ~ID_MODE_DIS;
274 reg |= id_mode_dis;
275 if (GENET_IS_V1(priv) || GENET_IS_V2(priv) || GENET_IS_V3(priv))
276 reg |= RGMII_MODE_EN_V123;
277 else
278 reg |= RGMII_MODE_EN;
279 bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL);
280 }
281
282 if (init)
283 dev_info(kdev, "configuring instance for %s\n", phy_name);
284
285 return 0;
286}
287
288int bcmgenet_mii_probe(struct net_device *dev)
289{
290 struct bcmgenet_priv *priv = netdev_priv(dev);
291 struct device *kdev = &priv->pdev->dev;
292 struct device_node *dn = kdev->of_node;
293 phy_interface_t phy_iface = priv->phy_interface;
294 struct phy_device *phydev;
295 u32 phy_flags = PHY_BRCM_AUTO_PWRDWN_ENABLE |
296 PHY_BRCM_DIS_TXCRXC_NOENRGY |
297 PHY_BRCM_IDDQ_SUSPEND;
298 int ret;
299
300
301 if (priv->internal_phy)
302 phy_flags = priv->gphy_rev;
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326 switch (priv->phy_interface) {
327 case PHY_INTERFACE_MODE_RGMII:
328 phy_iface = PHY_INTERFACE_MODE_RGMII_ID;
329 break;
330 case PHY_INTERFACE_MODE_RGMII_TXID:
331 phy_iface = PHY_INTERFACE_MODE_RGMII_RXID;
332 break;
333 default:
334 break;
335 }
336
337 if (dn) {
338 phydev = of_phy_connect(dev, priv->phy_dn, bcmgenet_mii_setup,
339 phy_flags, phy_iface);
340 if (!phydev) {
341 pr_err("could not attach to PHY\n");
342 return -ENODEV;
343 }
344 } else {
345 if (has_acpi_companion(kdev)) {
346 char mdio_bus_id[MII_BUS_ID_SIZE];
347 struct mii_bus *unimacbus;
348
349 snprintf(mdio_bus_id, MII_BUS_ID_SIZE, "%s-%d",
350 UNIMAC_MDIO_DRV_NAME, priv->pdev->id);
351
352 unimacbus = mdio_find_bus(mdio_bus_id);
353 if (!unimacbus) {
354 pr_err("Unable to find mii\n");
355 return -ENODEV;
356 }
357 phydev = phy_find_first(unimacbus);
358 put_device(&unimacbus->dev);
359 if (!phydev) {
360 pr_err("Unable to find PHY\n");
361 return -ENODEV;
362 }
363 } else {
364 phydev = dev->phydev;
365 }
366 phydev->dev_flags = phy_flags;
367
368 ret = phy_connect_direct(dev, phydev, bcmgenet_mii_setup,
369 phy_iface);
370 if (ret) {
371 pr_err("could not attach to PHY\n");
372 return -ENODEV;
373 }
374 }
375
376
377
378
379
380
381 ret = bcmgenet_mii_config(dev, true);
382 if (ret) {
383 phy_disconnect(dev->phydev);
384 return ret;
385 }
386
387
388
389
390
391
392
393 if (priv->internal_phy && !GENET_IS_V5(priv))
394 dev->phydev->irq = PHY_MAC_INTERRUPT;
395
396 return 0;
397}
398
399static struct device_node *bcmgenet_mii_of_find_mdio(struct bcmgenet_priv *priv)
400{
401 struct device_node *dn = priv->pdev->dev.of_node;
402 struct device *kdev = &priv->pdev->dev;
403 char *compat;
404
405 compat = kasprintf(GFP_KERNEL, "brcm,genet-mdio-v%d", priv->version);
406 if (!compat)
407 return NULL;
408
409 priv->mdio_dn = of_get_compatible_child(dn, compat);
410 kfree(compat);
411 if (!priv->mdio_dn) {
412 dev_err(kdev, "unable to find MDIO bus node\n");
413 return NULL;
414 }
415
416 return priv->mdio_dn;
417}
418
419static void bcmgenet_mii_pdata_init(struct bcmgenet_priv *priv,
420 struct unimac_mdio_pdata *ppd)
421{
422 struct device *kdev = &priv->pdev->dev;
423 struct bcmgenet_platform_data *pd = kdev->platform_data;
424
425 if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) {
426
427
428
429 if (pd->phy_address >= 0 && pd->phy_address < PHY_MAX_ADDR)
430 ppd->phy_mask = 1 << pd->phy_address;
431 else
432 ppd->phy_mask = 0;
433 }
434}
435
436static int bcmgenet_mii_wait(void *wait_func_data)
437{
438 struct bcmgenet_priv *priv = wait_func_data;
439
440 wait_event_timeout(priv->wq,
441 !(bcmgenet_umac_readl(priv, UMAC_MDIO_CMD)
442 & MDIO_START_BUSY),
443 HZ / 100);
444 return 0;
445}
446
447static int bcmgenet_mii_register(struct bcmgenet_priv *priv)
448{
449 struct platform_device *pdev = priv->pdev;
450 struct bcmgenet_platform_data *pdata = pdev->dev.platform_data;
451 struct device_node *dn = pdev->dev.of_node;
452 struct unimac_mdio_pdata ppd;
453 struct platform_device *ppdev;
454 struct resource *pres, res;
455 int id, ret;
456
457 pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
458 if (!pres) {
459 dev_err(&pdev->dev, "Invalid resource\n");
460 return -EINVAL;
461 }
462 memset(&res, 0, sizeof(res));
463 memset(&ppd, 0, sizeof(ppd));
464
465 ppd.wait_func = bcmgenet_mii_wait;
466 ppd.wait_func_data = priv;
467 ppd.bus_name = "bcmgenet MII bus";
468
469
470
471
472 res.start = pres->start + GENET_UMAC_OFF + UMAC_MDIO_CMD;
473 res.end = res.start + 8;
474 res.flags = IORESOURCE_MEM;
475
476 if (dn)
477 id = of_alias_get_id(dn, "eth");
478 else
479 id = pdev->id;
480
481 ppdev = platform_device_alloc(UNIMAC_MDIO_DRV_NAME, id);
482 if (!ppdev)
483 return -ENOMEM;
484
485
486 priv->mii_pdev = ppdev;
487 ppdev->dev.parent = &pdev->dev;
488 if (dn)
489 ppdev->dev.of_node = bcmgenet_mii_of_find_mdio(priv);
490 else if (pdata)
491 bcmgenet_mii_pdata_init(priv, &ppd);
492 else
493 ppd.phy_mask = ~0;
494
495 ret = platform_device_add_resources(ppdev, &res, 1);
496 if (ret)
497 goto out;
498
499 ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd));
500 if (ret)
501 goto out;
502
503 ret = platform_device_add(ppdev);
504 if (ret)
505 goto out;
506
507 return 0;
508out:
509 platform_device_put(ppdev);
510 return ret;
511}
512
513static int bcmgenet_phy_interface_init(struct bcmgenet_priv *priv)
514{
515 struct device *kdev = &priv->pdev->dev;
516 int phy_mode = device_get_phy_mode(kdev);
517
518 if (phy_mode < 0) {
519 dev_err(kdev, "invalid PHY mode property\n");
520 return phy_mode;
521 }
522
523 priv->phy_interface = phy_mode;
524
525
526
527
528
529
530 if (priv->phy_interface == PHY_INTERFACE_MODE_INTERNAL)
531 priv->internal_phy = true;
532
533 return 0;
534}
535
536static int bcmgenet_mii_of_init(struct bcmgenet_priv *priv)
537{
538 struct device_node *dn = priv->pdev->dev.of_node;
539 struct phy_device *phydev;
540 int ret;
541
542
543 priv->phy_dn = of_parse_phandle(dn, "phy-handle", 0);
544
545
546
547
548 if (!priv->phy_dn && of_phy_is_fixed_link(dn)) {
549 ret = of_phy_register_fixed_link(dn);
550 if (ret)
551 return ret;
552
553 priv->phy_dn = of_node_get(dn);
554 }
555
556
557 ret = bcmgenet_phy_interface_init(priv);
558 if (ret)
559 return ret;
560
561
562 if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
563 phydev = of_phy_find_device(dn);
564 if (phydev) {
565 phydev->link = 0;
566 put_device(&phydev->mdio.dev);
567 }
568 }
569
570 return 0;
571}
572
573static int bcmgenet_mii_pd_init(struct bcmgenet_priv *priv)
574{
575 struct device *kdev = &priv->pdev->dev;
576 struct bcmgenet_platform_data *pd = kdev->platform_data;
577 char phy_name[MII_BUS_ID_SIZE + 3];
578 char mdio_bus_id[MII_BUS_ID_SIZE];
579 struct phy_device *phydev;
580
581 snprintf(mdio_bus_id, MII_BUS_ID_SIZE, "%s-%d",
582 UNIMAC_MDIO_DRV_NAME, priv->pdev->id);
583
584 if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) {
585 snprintf(phy_name, MII_BUS_ID_SIZE, PHY_ID_FMT,
586 mdio_bus_id, pd->phy_address);
587
588
589
590
591 phydev = phy_attach(priv->dev, phy_name, pd->phy_interface);
592 if (IS_ERR(phydev)) {
593 dev_err(kdev, "failed to register PHY device\n");
594 return PTR_ERR(phydev);
595 }
596 } else {
597
598
599
600
601 struct fixed_phy_status fphy_status = {
602 .link = 1,
603 .speed = pd->phy_speed,
604 .duplex = pd->phy_duplex,
605 .pause = 0,
606 .asym_pause = 0,
607 };
608
609 phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL);
610 if (!phydev || IS_ERR(phydev)) {
611 dev_err(kdev, "failed to register fixed PHY device\n");
612 return -ENODEV;
613 }
614
615
616 phydev->link = 0;
617
618 }
619
620 priv->phy_interface = pd->phy_interface;
621
622 return 0;
623}
624
625static int bcmgenet_mii_bus_init(struct bcmgenet_priv *priv)
626{
627 struct device *kdev = &priv->pdev->dev;
628 struct device_node *dn = kdev->of_node;
629
630 if (dn)
631 return bcmgenet_mii_of_init(priv);
632 else if (has_acpi_companion(kdev))
633 return bcmgenet_phy_interface_init(priv);
634 else
635 return bcmgenet_mii_pd_init(priv);
636}
637
638int bcmgenet_mii_init(struct net_device *dev)
639{
640 struct bcmgenet_priv *priv = netdev_priv(dev);
641 int ret;
642
643 ret = bcmgenet_mii_register(priv);
644 if (ret)
645 return ret;
646
647 ret = bcmgenet_mii_bus_init(priv);
648 if (ret)
649 goto out;
650
651 return 0;
652
653out:
654 bcmgenet_mii_exit(dev);
655 return ret;
656}
657
658void bcmgenet_mii_exit(struct net_device *dev)
659{
660 struct bcmgenet_priv *priv = netdev_priv(dev);
661 struct device_node *dn = priv->pdev->dev.of_node;
662
663 if (of_phy_is_fixed_link(dn))
664 of_phy_deregister_fixed_link(dn);
665 of_node_put(priv->phy_dn);
666 platform_device_unregister(priv->mii_pdev);
667}
668