forked from ~ljy/RK356X_SDK_RELEASE
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2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/net/ethernet/xscale/ixp4xx_eth.c
....@@ -1,11 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Intel IXP4xx Ethernet driver for Linux
34  *
45  * Copyright (C) 2007 Krzysztof Halasa <khc@pm.waw.pl>
5
- *
6
- * This program is free software; you can redistribute it and/or modify it
7
- * under the terms of version 2 of the GNU General Public License
8
- * as published by the Free Software Foundation.
96  *
107  * Ethernet port config (0x00 is not present on IXP42X):
118  *
....@@ -15,7 +12,6 @@
1512  * TX queue		23		24		25
1613  * RX-free queue	26		27		28
1714  * TX-done queue is always 31, per-port RX and TX-ready queues are configurable
18
- *
1915  *
2016  * Queue entries:
2117  * bits 0 -> 1	- NPE ID (RX and TX-done)
....@@ -31,14 +27,17 @@
3127 #include <linux/io.h>
3228 #include <linux/kernel.h>
3329 #include <linux/net_tstamp.h>
30
+#include <linux/of.h>
3431 #include <linux/phy.h>
32
+#include <linux/platform_data/eth_ixp4xx.h>
3533 #include <linux/platform_device.h>
3634 #include <linux/ptp_classify.h>
3735 #include <linux/slab.h>
3836 #include <linux/module.h>
39
-#include <mach/ixp46x_ts.h>
40
-#include <mach/npe.h>
41
-#include <mach/qmgr.h>
37
+#include <linux/soc/ixp4xx/npe.h>
38
+#include <linux/soc/ixp4xx/qmgr.h>
39
+
40
+#include "ixp46x_ts.h"
4241 
4342 #define DEBUG_DESC		0
4443 #define DEBUG_RX		0
....@@ -139,7 +138,7 @@
139138 #ifdef __ARMEB__
140139 typedef struct sk_buff buffer_t;
141140 #define free_buffer dev_kfree_skb
142
-#define free_buffer_irq dev_kfree_skb_irq
141
+#define free_buffer_irq dev_consume_skb_irq
143142 #else
144143 typedef void buffer_t;
145144 #define free_buffer kfree
....@@ -520,25 +519,14 @@
520519 	return ret;
521520 }
522521 
523
-static int ixp4xx_mdio_register(void)
522
+static int ixp4xx_mdio_register(struct eth_regs __iomem *regs)
524523 {
525524 	int err;
526525 
527526 	if (!(mdio_bus = mdiobus_alloc()))
528527 		return -ENOMEM;
529528 
530
-	if (cpu_is_ixp43x()) {
531
-		/* IXP43x lacks NPE-B and uses NPE-C for MII PHY access */
532
-		if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEC_ETH))
533
-			return -ENODEV;
534
-		mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
535
-	} else {
536
-		/* All MII PHY accesses use NPE-B Ethernet registers */
537
-		if (!(ixp4xx_read_feature_bits() & IXP4XX_FEATURE_NPEB_ETH0))
538
-			return -ENODEV;
539
-		mdio_regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
540
-	}
541
-
529
+	mdio_regs = regs;
542530 	__raw_writel(DEFAULT_CORE_CNTRL, &mdio_regs->core_control);
543531 	spin_lock_init(&mdio_lock);
544532 	mdio_bus->name = "IXP4xx MII Bus";
....@@ -584,8 +572,8 @@
584572 		__raw_writel(DEFAULT_TX_CNTRL0 | TX_CNTRL0_HALFDUPLEX,
585573 			     &port->regs->tx_control[0]);
586574 
587
-	printk(KERN_INFO "%s: link up, speed %u Mb/s, %s duplex\n",
588
-	       dev->name, port->speed, port->duplex ? "full" : "half");
575
+	netdev_info(dev, "%s: link up, speed %u Mb/s, %s duplex\n",
576
+		    dev->name, port->speed, port->duplex ? "full" : "half");
589577 }
590578 
591579 
....@@ -595,7 +583,7 @@
595583 #if DEBUG_PKT_BYTES
596584 	int i;
597585 
598
-	printk(KERN_DEBUG "%s: %s(%i) ", dev->name, func, len);
586
+	netdev_debug(dev, "%s(%i) ", func, len);
599587 	for (i = 0; i < len; i++) {
600588 		if (i >= DEBUG_PKT_BYTES)
601589 			break;
....@@ -686,7 +674,7 @@
686674 	int received = 0;
687675 
688676 #if DEBUG_RX
689
-	printk(KERN_DEBUG "%s: eth_poll\n", dev->name);
677
+	netdev_debug(dev, "eth_poll\n");
690678 #endif
691679 
692680 	while (received < budget) {
....@@ -700,23 +688,20 @@
700688 
701689 		if ((n = queue_get_desc(rxq, port, 0)) < 0) {
702690 #if DEBUG_RX
703
-			printk(KERN_DEBUG "%s: eth_poll napi_complete\n",
704
-			       dev->name);
691
+			netdev_debug(dev, "eth_poll napi_complete\n");
705692 #endif
706693 			napi_complete(napi);
707694 			qmgr_enable_irq(rxq);
708695 			if (!qmgr_stat_below_low_watermark(rxq) &&
709696 			    napi_reschedule(napi)) { /* not empty again */
710697 #if DEBUG_RX
711
-				printk(KERN_DEBUG "%s: eth_poll napi_reschedule succeeded\n",
712
-				       dev->name);
698
+				netdev_debug(dev, "eth_poll napi_reschedule succeeded\n");
713699 #endif
714700 				qmgr_disable_irq(rxq);
715701 				continue;
716702 			}
717703 #if DEBUG_RX
718
-			printk(KERN_DEBUG "%s: eth_poll all done\n",
719
-			       dev->name);
704
+			netdev_debug(dev, "eth_poll all done\n");
720705 #endif
721706 			return received; /* all work done */
722707 		}
....@@ -781,7 +766,7 @@
781766 	}
782767 
783768 #if DEBUG_RX
784
-	printk(KERN_DEBUG "eth_poll(): end, not all work done\n");
769
+	netdev_debug(dev, "eth_poll(): end, not all work done\n");
785770 #endif
786771 	return received;		/* not all work done */
787772 }
....@@ -845,7 +830,7 @@
845830 	struct desc *desc;
846831 
847832 #if DEBUG_TX
848
-	printk(KERN_DEBUG "%s: eth_xmit\n", dev->name);
833
+	netdev_debug(dev, "eth_xmit\n");
849834 #endif
850835 
851836 	if (unlikely(skb->len > MAX_MRU)) {
....@@ -900,22 +885,21 @@
900885 
901886 	if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
902887 #if DEBUG_TX
903
-		printk(KERN_DEBUG "%s: eth_xmit queue full\n", dev->name);
888
+		netdev_debug(dev, "eth_xmit queue full\n");
904889 #endif
905890 		netif_stop_queue(dev);
906891 		/* we could miss TX ready interrupt */
907892 		/* really empty in fact */
908893 		if (!qmgr_stat_below_low_watermark(txreadyq)) {
909894 #if DEBUG_TX
910
-			printk(KERN_DEBUG "%s: eth_xmit ready again\n",
911
-			       dev->name);
895
+			netdev_debug(dev, "eth_xmit ready again\n");
912896 #endif
913897 			netif_wake_queue(dev);
914898 		}
915899 	}
916900 
917901 #if DEBUG_TX
918
-	printk(KERN_DEBUG "%s: eth_xmit end\n", dev->name);
902
+	netdev_debug(dev, "eth_xmit end\n");
919903 #endif
920904 
921905 	ixp_tx_timestamp(port, skb);
....@@ -1189,8 +1173,7 @@
11891173 			return err;
11901174 
11911175 		if (npe_recv_message(npe, &msg, "ETH_GET_STATUS")) {
1192
-			printk(KERN_ERR "%s: %s not responding\n", dev->name,
1193
-			       npe_name(npe));
1176
+			netdev_err(dev, "%s not responding\n", npe_name(npe));
11941177 			return -EIO;
11951178 		}
11961179 		port->firmware[0] = msg.byte4;
....@@ -1302,7 +1285,7 @@
13021285 	msg.eth_id = port->id;
13031286 	msg.byte3 = 1;
13041287 	if (npe_send_recv_message(port->npe, &msg, "ETH_ENABLE_LOOPBACK"))
1305
-		printk(KERN_CRIT "%s: unable to enable loopback\n", dev->name);
1288
+		netdev_crit(dev, "unable to enable loopback\n");
13061289 
13071290 	i = 0;
13081291 	do {			/* drain RX buffers */
....@@ -1326,11 +1309,11 @@
13261309 	} while (++i < MAX_CLOSE_WAIT);
13271310 
13281311 	if (buffs)
1329
-		printk(KERN_CRIT "%s: unable to drain RX queue, %i buffer(s)"
1330
-		       " left in NPE\n", dev->name, buffs);
1312
+		netdev_crit(dev, "unable to drain RX queue, %i buffer(s)"
1313
+			    " left in NPE\n", buffs);
13311314 #if DEBUG_CLOSE
13321315 	if (!buffs)
1333
-		printk(KERN_DEBUG "Draining RX queue took %i cycles\n", i);
1316
+		netdev_debug(dev, "draining RX queue took %i cycles\n", i);
13341317 #endif
13351318 
13361319 	buffs = TX_DESCS;
....@@ -1346,17 +1329,16 @@
13461329 	} while (++i < MAX_CLOSE_WAIT);
13471330 
13481331 	if (buffs)
1349
-		printk(KERN_CRIT "%s: unable to drain TX queue, %i buffer(s) "
1350
-		       "left in NPE\n", dev->name, buffs);
1332
+		netdev_crit(dev, "unable to drain TX queue, %i buffer(s) "
1333
+			    "left in NPE\n", buffs);
13511334 #if DEBUG_CLOSE
13521335 	if (!buffs)
1353
-		printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
1336
+		netdev_debug(dev, "draining TX queues took %i cycles\n", i);
13541337 #endif
13551338 
13561339 	msg.byte3 = 0;
13571340 	if (npe_send_recv_message(port->npe, &msg, "ETH_DISABLE_LOOPBACK"))
1358
-		printk(KERN_CRIT "%s: unable to disable loopback\n",
1359
-		       dev->name);
1341
+		netdev_crit(dev, "unable to disable loopback\n");
13601342 
13611343 	phy_stop(dev->phydev);
13621344 
....@@ -1377,54 +1359,93 @@
13771359 	.ndo_validate_addr = eth_validate_addr,
13781360 };
13791361 
1380
-static int eth_init_one(struct platform_device *pdev)
1362
+static int ixp4xx_eth_probe(struct platform_device *pdev)
13811363 {
1382
-	struct port *port;
1383
-	struct net_device *dev;
1384
-	struct eth_plat_info *plat = dev_get_platdata(&pdev->dev);
1385
-	struct phy_device *phydev = NULL;
1386
-	u32 regs_phys;
13871364 	char phy_id[MII_BUS_ID_SIZE + 3];
1365
+	struct phy_device *phydev = NULL;
1366
+	struct device *dev = &pdev->dev;
1367
+	struct eth_plat_info *plat;
1368
+	resource_size_t regs_phys;
1369
+	struct net_device *ndev;
1370
+	struct resource *res;
1371
+	struct port *port;
13881372 	int err;
13891373 
1390
-	if (!(dev = alloc_etherdev(sizeof(struct port))))
1374
+	plat = dev_get_platdata(dev);
1375
+
1376
+	if (!(ndev = devm_alloc_etherdev(dev, sizeof(struct port))))
13911377 		return -ENOMEM;
13921378 
1393
-	SET_NETDEV_DEV(dev, &pdev->dev);
1394
-	port = netdev_priv(dev);
1395
-	port->netdev = dev;
1379
+	SET_NETDEV_DEV(ndev, dev);
1380
+	port = netdev_priv(ndev);
1381
+	port->netdev = ndev;
13961382 	port->id = pdev->id;
1383
+
1384
+	/* Get the port resource and remap */
1385
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1386
+	if (!res)
1387
+		return -ENODEV;
1388
+	regs_phys = res->start;
1389
+	port->regs = devm_ioremap_resource(dev, res);
1390
+	if (IS_ERR(port->regs))
1391
+		return PTR_ERR(port->regs);
13971392 
13981393 	switch (port->id) {
13991394 	case IXP4XX_ETH_NPEA:
1400
-		port->regs = (struct eth_regs __iomem *)IXP4XX_EthA_BASE_VIRT;
1401
-		regs_phys  = IXP4XX_EthA_BASE_PHYS;
1395
+		/* If the MDIO bus is not up yet, defer probe */
1396
+		if (!mdio_bus)
1397
+			return -EPROBE_DEFER;
14021398 		break;
14031399 	case IXP4XX_ETH_NPEB:
1404
-		port->regs = (struct eth_regs __iomem *)IXP4XX_EthB_BASE_VIRT;
1405
-		regs_phys  = IXP4XX_EthB_BASE_PHYS;
1400
+		/*
1401
+		 * On all except IXP43x, NPE-B is used for the MDIO bus.
1402
+		 * If there is no NPE-B in the feature set, bail out, else
1403
+		 * register the MDIO bus.
1404
+		 */
1405
+		if (!cpu_is_ixp43x()) {
1406
+			if (!(ixp4xx_read_feature_bits() &
1407
+			      IXP4XX_FEATURE_NPEB_ETH0))
1408
+				return -ENODEV;
1409
+			/* Else register the MDIO bus on NPE-B */
1410
+			if ((err = ixp4xx_mdio_register(port->regs)))
1411
+				return err;
1412
+		}
1413
+		if (!mdio_bus)
1414
+			return -EPROBE_DEFER;
14061415 		break;
14071416 	case IXP4XX_ETH_NPEC:
1408
-		port->regs = (struct eth_regs __iomem *)IXP4XX_EthC_BASE_VIRT;
1409
-		regs_phys  = IXP4XX_EthC_BASE_PHYS;
1417
+		/*
1418
+		 * IXP43x lacks NPE-B and uses NPE-C for the MDIO bus access,
1419
+		 * of there is no NPE-C, no bus, nothing works, so bail out.
1420
+		 */
1421
+		if (cpu_is_ixp43x()) {
1422
+			if (!(ixp4xx_read_feature_bits() &
1423
+			      IXP4XX_FEATURE_NPEC_ETH))
1424
+				return -ENODEV;
1425
+			/* Else register the MDIO bus on NPE-C */
1426
+			if ((err = ixp4xx_mdio_register(port->regs)))
1427
+				return err;
1428
+		}
1429
+		if (!mdio_bus)
1430
+			return -EPROBE_DEFER;
14101431 		break;
14111432 	default:
1412
-		err = -ENODEV;
1413
-		goto err_free;
1433
+		return -ENODEV;
14141434 	}
14151435 
1416
-	dev->netdev_ops = &ixp4xx_netdev_ops;
1417
-	dev->ethtool_ops = &ixp4xx_ethtool_ops;
1418
-	dev->tx_queue_len = 100;
1436
+	ndev->netdev_ops = &ixp4xx_netdev_ops;
1437
+	ndev->ethtool_ops = &ixp4xx_ethtool_ops;
1438
+	ndev->tx_queue_len = 100;
1439
+	/* Inherit the DMA masks from the platform device */
1440
+	ndev->dev.dma_mask = dev->dma_mask;
1441
+	ndev->dev.coherent_dma_mask = dev->coherent_dma_mask;
14191442 
1420
-	netif_napi_add(dev, &port->napi, eth_poll, NAPI_WEIGHT);
1443
+	netif_napi_add(ndev, &port->napi, eth_poll, NAPI_WEIGHT);
14211444 
1422
-	if (!(port->npe = npe_request(NPE_ID(port->id)))) {
1423
-		err = -EIO;
1424
-		goto err_free;
1425
-	}
1445
+	if (!(port->npe = npe_request(NPE_ID(port->id))))
1446
+		return -EIO;
14261447 
1427
-	port->mem_res = request_mem_region(regs_phys, REGS_SIZE, dev->name);
1448
+	port->mem_res = request_mem_region(regs_phys, REGS_SIZE, ndev->name);
14281449 	if (!port->mem_res) {
14291450 		err = -EBUSY;
14301451 		goto err_npe_rel;
....@@ -1432,9 +1453,9 @@
14321453 
14331454 	port->plat = plat;
14341455 	npe_port_tab[NPE_ID(port->id)] = port;
1435
-	memcpy(dev->dev_addr, plat->hwaddr, ETH_ALEN);
1456
+	memcpy(ndev->dev_addr, plat->hwaddr, ETH_ALEN);
14361457 
1437
-	platform_set_drvdata(pdev, dev);
1458
+	platform_set_drvdata(pdev, ndev);
14381459 
14391460 	__raw_writel(DEFAULT_CORE_CNTRL | CORE_RESET,
14401461 		     &port->regs->core_control);
....@@ -1444,7 +1465,7 @@
14441465 
14451466 	snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT,
14461467 		mdio_bus->id, plat->phy);
1447
-	phydev = phy_connect(dev, phy_id, &ixp4xx_adjust_link,
1468
+	phydev = phy_connect(ndev, phy_id, &ixp4xx_adjust_link,
14481469 			     PHY_INTERFACE_MODE_MII);
14491470 	if (IS_ERR(phydev)) {
14501471 		err = PTR_ERR(phydev);
....@@ -1453,11 +1474,11 @@
14531474 
14541475 	phydev->irq = PHY_POLL;
14551476 
1456
-	if ((err = register_netdev(dev)))
1477
+	if ((err = register_netdev(ndev)))
14571478 		goto err_phy_dis;
14581479 
1459
-	printk(KERN_INFO "%s: MII PHY %i on %s\n", dev->name, plat->phy,
1460
-	       npe_name(port->npe));
1480
+	netdev_info(ndev, "%s: MII PHY %i on %s\n", ndev->name, plat->phy,
1481
+		    npe_name(port->npe));
14611482 
14621483 	return 0;
14631484 
....@@ -1468,49 +1489,32 @@
14681489 	release_resource(port->mem_res);
14691490 err_npe_rel:
14701491 	npe_release(port->npe);
1471
-err_free:
1472
-	free_netdev(dev);
14731492 	return err;
14741493 }
14751494 
1476
-static int eth_remove_one(struct platform_device *pdev)
1495
+static int ixp4xx_eth_remove(struct platform_device *pdev)
14771496 {
1478
-	struct net_device *dev = platform_get_drvdata(pdev);
1479
-	struct phy_device *phydev = dev->phydev;
1480
-	struct port *port = netdev_priv(dev);
1497
+	struct net_device *ndev = platform_get_drvdata(pdev);
1498
+	struct phy_device *phydev = ndev->phydev;
1499
+	struct port *port = netdev_priv(ndev);
14811500 
1482
-	unregister_netdev(dev);
1501
+	unregister_netdev(ndev);
14831502 	phy_disconnect(phydev);
1503
+	ixp4xx_mdio_remove();
14841504 	npe_port_tab[NPE_ID(port->id)] = NULL;
14851505 	npe_release(port->npe);
14861506 	release_resource(port->mem_res);
1487
-	free_netdev(dev);
14881507 	return 0;
14891508 }
14901509 
14911510 static struct platform_driver ixp4xx_eth_driver = {
14921511 	.driver.name	= DRV_NAME,
1493
-	.probe		= eth_init_one,
1494
-	.remove		= eth_remove_one,
1512
+	.probe		= ixp4xx_eth_probe,
1513
+	.remove		= ixp4xx_eth_remove,
14951514 };
1496
-
1497
-static int __init eth_init_module(void)
1498
-{
1499
-	int err;
1500
-	if ((err = ixp4xx_mdio_register()))
1501
-		return err;
1502
-	return platform_driver_register(&ixp4xx_eth_driver);
1503
-}
1504
-
1505
-static void __exit eth_cleanup_module(void)
1506
-{
1507
-	platform_driver_unregister(&ixp4xx_eth_driver);
1508
-	ixp4xx_mdio_remove();
1509
-}
1515
+module_platform_driver(ixp4xx_eth_driver);
15101516 
15111517 MODULE_AUTHOR("Krzysztof Halasa");
15121518 MODULE_DESCRIPTION("Intel IXP4xx Ethernet driver");
15131519 MODULE_LICENSE("GPL v2");
15141520 MODULE_ALIAS("platform:ixp4xx_eth");
1515
-module_init(eth_init_module);
1516
-module_exit(eth_cleanup_module);