1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
29 	mutex_lock(&dev->lock);  in tah_attach()
30 	/* Reset has been done at probe() time... nothing else to do for now */  in tah_attach()
31 	++dev->users;  in tah_attach()
32 	mutex_unlock(&dev->lock);  in tah_attach()
41 	mutex_lock(&dev->lock);  in tah_detach()
42 	--dev->users;  in tah_detach()
43 	mutex_unlock(&dev->lock);  in tah_detach()
49 	struct tah_regs __iomem *p = dev->base;  in tah_reset()
52 	/* Reset TAH */  in tah_reset()
53 	out_be32(&p->mr, TAH_MR_SR);  in tah_reset()
55 	while ((in_be32(&p->mr) & TAH_MR_SR) && n)  in tah_reset()
56 		--n;  in tah_reset()
59 		printk(KERN_ERR "%pOF: reset timeout\n", ofdev->dev.of_node);  in tah_reset()
62 	out_be32(&p->mr,  in tah_reset()
79 	hdr->version = 0;  in tah_dump_regs()
80 	hdr->index = 0; /* for now, are there chips with more than one  in tah_dump_regs()
84 	memcpy_fromio(regs, dev->base, sizeof(struct tah_regs));  in tah_dump_regs()
93 	dev = devm_kzalloc(&ofdev->dev, sizeof(struct tah_instance),  in tah_probe()
96 		return -ENOMEM;  in tah_probe()
98 	err = devm_mutex_init(&ofdev->dev, &dev->lock);  in tah_probe()
102 	dev->ofdev = ofdev;  in tah_probe()
104 	dev->base = devm_platform_ioremap_resource(ofdev, 0);  in tah_probe()
105 	if (IS_ERR(dev->base)) {  in tah_probe()
106 		dev_err(&ofdev->dev, "can't map device registers");  in tah_probe()
107 		return PTR_ERR(dev->base);  in tah_probe()
115 	printk(KERN_INFO "TAH %pOF initialized\n", ofdev->dev.of_node);  in tah_probe()
135 		.name = "emac-tah",
138 	.probe = tah_probe,