forked from ~ljy/RK356X_SDK_RELEASE
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hc
2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87 
 kernel/drivers/usb/musb/musb_core.c
....@@ -73,6 +73,7 @@
7373 #include <linux/prefetch.h>
7474 #include <linux/platform_device.h>
7575 #include <linux/io.h>
76
+#include <linux/iopoll.h>
7677 #include <linux/dma-mapping.h>
7778 #include <linux/usb.h>
7879 #include <linux/usb/of.h>
....@@ -452,6 +453,108 @@
452453 	return hw_ep->musb->io.write_fifo(hw_ep, len, src);
453454 }
454455 
456
+static u8 musb_read_devctl(struct musb *musb)
457
+{
458
+	return musb_readb(musb->mregs, MUSB_DEVCTL);
459
+}
460
+
461
+/**
462
+ * musb_set_host - set and initialize host mode
463
+ * @musb: musb controller driver data
464
+ *
465
+ * At least some musb revisions need to enable devctl session bit in
466
+ * peripheral mode to switch to host mode. Initializes things to host
467
+ * mode and sets A_IDLE. SoC glue needs to advance state further
468
+ * based on phy provided VBUS state.
469
+ *
470
+ * Note that the SoC glue code may need to wait for musb to settle
471
+ * on enable before calling this to avoid babble.
472
+ */
473
+int musb_set_host(struct musb *musb)
474
+{
475
+	int error = 0;
476
+	u8 devctl;
477
+
478
+	if (!musb)
479
+		return -EINVAL;
480
+
481
+	devctl = musb_read_devctl(musb);
482
+	if (!(devctl & MUSB_DEVCTL_BDEVICE)) {
483
+		dev_info(musb->controller,
484
+			 "%s: already in host mode: %02x\n",
485
+			 __func__, devctl);
486
+		goto init_data;
487
+	}
488
+
489
+	devctl |= MUSB_DEVCTL_SESSION;
490
+	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
491
+
492
+	error = readx_poll_timeout(musb_read_devctl, musb, devctl,
493
+				   !(devctl & MUSB_DEVCTL_BDEVICE), 5000,
494
+				   1000000);
495
+	if (error) {
496
+		dev_err(musb->controller, "%s: could not set host: %02x\n",
497
+			__func__, devctl);
498
+
499
+		return error;
500
+	}
501
+
502
+init_data:
503
+	musb->is_active = 1;
504
+	musb->xceiv->otg->state = OTG_STATE_A_IDLE;
505
+	MUSB_HST_MODE(musb);
506
+
507
+	return error;
508
+}
509
+EXPORT_SYMBOL_GPL(musb_set_host);
510
+
511
+/**
512
+ * musb_set_peripheral - set and initialize peripheral mode
513
+ * @musb: musb controller driver data
514
+ *
515
+ * Clears devctl session bit and initializes things for peripheral
516
+ * mode and sets B_IDLE. SoC glue needs to advance state further
517
+ * based on phy provided VBUS state.
518
+ */
519
+int musb_set_peripheral(struct musb *musb)
520
+{
521
+	int error = 0;
522
+	u8 devctl;
523
+
524
+	if (!musb)
525
+		return -EINVAL;
526
+
527
+	devctl = musb_read_devctl(musb);
528
+	if (devctl & MUSB_DEVCTL_BDEVICE) {
529
+		dev_info(musb->controller,
530
+			 "%s: already in peripheral mode: %02x\n",
531
+			 __func__, devctl);
532
+
533
+		goto init_data;
534
+	}
535
+
536
+	devctl &= ~MUSB_DEVCTL_SESSION;
537
+	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
538
+
539
+	error = readx_poll_timeout(musb_read_devctl, musb, devctl,
540
+				   devctl & MUSB_DEVCTL_BDEVICE, 5000,
541
+				   1000000);
542
+	if (error) {
543
+		dev_err(musb->controller, "%s: could not set peripheral: %02x\n",
544
+			__func__, devctl);
545
+
546
+		return error;
547
+	}
548
+
549
+init_data:
550
+	musb->is_active = 0;
551
+	musb->xceiv->otg->state = OTG_STATE_B_IDLE;
552
+	MUSB_DEV_MODE(musb);
553
+
554
+	return error;
555
+}
556
+EXPORT_SYMBOL_GPL(musb_set_peripheral);
557
+
455558 /*-------------------------------------------------------------------------*/
456559 
457560 /* for high speed test mode; see USB 2.0 spec 7.1.20 */
....@@ -749,7 +852,7 @@
749852 	case OTG_STATE_B_IDLE:
750853 		if (!musb->is_active)
751854 			break;
752
-		/* fall through */
855
+		fallthrough;
753856 	case OTG_STATE_B_PERIPHERAL:
754857 		musb_g_suspend(musb);
755858 		musb->is_active = musb->g.b_hnp_enable;
....@@ -869,9 +972,8 @@
869972 	case OTG_STATE_A_PERIPHERAL:
870973 		musb_hnp_stop(musb);
871974 		musb_root_disconnect(musb);
872
-		/* FALLTHROUGH */
975
+		fallthrough;
873976 	case OTG_STATE_B_WAIT_ACON:
874
-		/* FALLTHROUGH */
875977 	case OTG_STATE_B_PERIPHERAL:
876978 	case OTG_STATE_B_IDLE:
877979 		musb_g_disconnect(musb);
....@@ -906,7 +1008,7 @@
9061008 		switch (musb->xceiv->otg->state) {
9071009 		case OTG_STATE_A_SUSPEND:
9081010 			musb_g_reset(musb);
909
-			/* FALLTHROUGH */
1011
+			fallthrough;
9101012 		case OTG_STATE_A_WAIT_BCON:	/* OPT TD.4.7-900ms */
9111013 			/* never use invalid T(a_wait_bcon) */
9121014 			musb_dbg(musb, "HNP: in %s, %d msec timeout",
....@@ -927,7 +1029,7 @@
9271029 			break;
9281030 		case OTG_STATE_B_IDLE:
9291031 			musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL;
930
-			/* FALLTHROUGH */
1032
+			fallthrough;
9311033 		case OTG_STATE_B_PERIPHERAL:
9321034 			musb_g_reset(musb);
9331035 			break;
....@@ -947,7 +1049,6 @@
9471049  * @param musb instance pointer
9481050  * @param int_usb register contents
9491051  * @param devctl
950
- * @param power
9511052  */
9521053 
9531054 static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
....@@ -1369,7 +1470,7 @@
13691470 	switch (fifo_mode) {
13701471 	default:
13711472 		fifo_mode = 0;
1372
-		/* FALLTHROUGH */
1473
+		fallthrough;
13731474 	case 0:
13741475 		cfg = mode_0_cfg;
13751476 		n = ARRAY_SIZE(mode_0_cfg);
....@@ -1534,10 +1635,11 @@
15341635 	} else {
15351636 		musb->is_multipoint = 0;
15361637 		type = "";
1537
-#ifndef	CONFIG_USB_OTG_BLACKLIST_HUB
1538
-		pr_err("%s: kernel must blacklist external hubs\n",
1539
-		       musb_driver_name);
1540
-#endif
1638
+		if (IS_ENABLED(CONFIG_USB) &&
1639
+		    !IS_ENABLED(CONFIG_USB_OTG_DISABLE_EXTERNAL_HUB)) {
1640
+			pr_err("%s: kernel must disable external hubs, please fix the configuration\n",
1641
+			       musb_driver_name);
1642
+		}
15411643 	}
15421644 
15431645 	/* log release info */
....@@ -1692,7 +1794,7 @@
16921794 EXPORT_SYMBOL_GPL(musb_interrupt);
16931795 
16941796 #ifndef CONFIG_MUSB_PIO_ONLY
1695
-static bool use_dma = 1;
1797
+static bool use_dma = true;
16961798 
16971799 /* "modprobe ... use_dma=0" etc */
16981800 module_param(use_dma, bool, 0644);
....@@ -1757,7 +1859,7 @@
17571859 {
17581860 	struct musb *musb = dev_to_musb(dev);
17591861 	unsigned long flags;
1760
-	int ret = -EINVAL;
1862
+	int ret;
17611863 
17621864 	spin_lock_irqsave(&musb->lock, flags);
17631865 	ret = sprintf(buf, "%s\n", usb_otg_state_string(musb->xceiv->otg->state));
....@@ -1865,16 +1967,13 @@
18651967 }
18661968 static DEVICE_ATTR_WO(srp);
18671969 
1868
-static struct attribute *musb_attributes[] = {
1970
+static struct attribute *musb_attrs[] = {
18691971 	&dev_attr_mode.attr,
18701972 	&dev_attr_vbus.attr,
18711973 	&dev_attr_srp.attr,
18721974 	NULL
18731975 };
1874
-
1875
-static const struct attribute_group musb_attr_group = {
1876
-	.attrs = musb_attributes,
1877
-};
1976
+ATTRIBUTE_GROUPS(musb);
18781977 
18791978 #define MUSB_QUIRK_B_INVALID_VBUS_91	(MUSB_DEVCTL_BDEVICE | \
18801979 					 (2 << MUSB_DEVCTL_VBUS_SHIFT) | \
....@@ -1910,9 +2009,8 @@
19102009 			schedule_delayed_work(&musb->irq_work,
19112010 					      msecs_to_jiffies(1000));
19122011 			musb->quirk_retries--;
1913
-			break;
19142012 		}
1915
-		/* fall through */
2013
+		break;
19162014 	case MUSB_QUIRK_B_INVALID_VBUS_91:
19172015 		if (musb->quirk_retries && !musb->flush_irq_work) {
19182016 			musb_dbg(musb,
....@@ -1922,7 +2020,7 @@
19222020 			musb->quirk_retries--;
19232021 			return;
19242022 		}
1925
-		/* fall through */
2023
+		fallthrough;
19262024 	case MUSB_QUIRK_A_DISCONNECT_19:
19272025 		if (musb->quirk_retries && !musb->flush_irq_work) {
19282026 			musb_dbg(musb,
....@@ -1971,7 +2069,7 @@
19712069 	struct musb *musb = container_of(data, struct musb, irq_work.work);
19722070 	int error;
19732071 
1974
-	error = pm_runtime_get_sync(musb->controller);
2072
+	error = pm_runtime_resume_and_get(musb->controller);
19752073 	if (error < 0) {
19762074 		dev_err(musb->controller, "Could not enable: %i\n", error);
19772075 
....@@ -2085,10 +2183,6 @@
20852183 	 * probe(), where things may be partially set up, as well as rmmod
20862184 	 * cleanup after everything's been de-activated.
20872185 	 */
2088
-
2089
-#ifdef CONFIG_SYSFS
2090
-	sysfs_remove_group(&musb->controller->kobj, &musb_attr_group);
2091
-#endif
20922186 
20932187 	if (musb->nIrq >= 0) {
20942188 		if (musb->irq_wake)
....@@ -2463,21 +2557,11 @@
24632557 
24642558 	musb_init_debugfs(musb);
24652559 
2466
-	status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
2467
-	if (status)
2468
-		goto fail5;
2469
-
24702560 	musb->is_initialized = 1;
24712561 	pm_runtime_mark_last_busy(musb->controller);
24722562 	pm_runtime_put_autosuspend(musb->controller);
24732563 
24742564 	return 0;
2475
-
2476
-fail5:
2477
-	musb_exit_debugfs(musb);
2478
-
2479
-	musb_gadget_cleanup(musb);
2480
-	musb_host_cleanup(musb);
24812565 
24822566 fail3:
24832567 	cancel_delayed_work_sync(&musb->irq_work);
....@@ -2521,14 +2605,12 @@
25212605 {
25222606 	struct device	*dev = &pdev->dev;
25232607 	int		irq = platform_get_irq_byname(pdev, "mc");
2524
-	struct resource	*iomem;
25252608 	void __iomem	*base;
25262609 
25272610 	if (irq <= 0)
25282611 		return -ENODEV;
25292612 
2530
-	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2531
-	base = devm_ioremap_resource(dev, iomem);
2613
+	base = devm_platform_ioremap_resource(pdev, 0);
25322614 	if (IS_ERR(base))
25332615 		return PTR_ERR(base);
25342616 
....@@ -2875,9 +2957,10 @@
28752957 
28762958 static struct platform_driver musb_driver = {
28772959 	.driver = {
2878
-		.name		= (char *)musb_driver_name,
2960
+		.name		= musb_driver_name,
28792961 		.bus		= &platform_bus_type,
28802962 		.pm		= MUSB_DEV_PM_OPS,
2963
+		.dev_groups	= musb_groups,
28812964 	},
28822965 	.probe		= musb_probe,
28832966 	.remove		= musb_remove,