1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
57 static inline u32 rgmii_mode_mask(int mode, int input)  in rgmii_mode_mask()  argument
59 	switch (mode) {  in rgmii_mode_mask()
64 		return RGMII_FER_RGMII(input);  in rgmii_mode_mask()
66 		return RGMII_FER_TBI(input);  in rgmii_mode_mask()
68 		return RGMII_FER_GMII(input);  in rgmii_mode_mask()
70 		return RGMII_FER_MII(input);  in rgmii_mode_mask()
72 		return RGMII_FER_RTBI(input);  in rgmii_mode_mask()
78 int rgmii_attach(struct platform_device *ofdev, int input, int mode)  in rgmii_attach()  argument
81 	struct rgmii_regs __iomem *p = dev->base;  in rgmii_attach()
83 	RGMII_DBG(dev, "attach(%d)" NL, input);  in rgmii_attach()
86 	if (input < 0 || !rgmii_valid_mode(mode)) {  in rgmii_attach()
88 		       ofdev->dev.of_node);  in rgmii_attach()
89 		return -ENODEV;  in rgmii_attach()
92 	mutex_lock(&dev->lock);  in rgmii_attach()
94 	/* Enable this input */  in rgmii_attach()
95 	out_be32(&p->fer, in_be32(&p->fer) | rgmii_mode_mask(mode, input));  in rgmii_attach()
97 	printk(KERN_NOTICE "%pOF: input %d in %s mode\n",  in rgmii_attach()
98 	       ofdev->dev.of_node, input, phy_modes(mode));  in rgmii_attach()
100 	++dev->users;  in rgmii_attach()
102 	mutex_unlock(&dev->lock);  in rgmii_attach()
107 void rgmii_set_speed(struct platform_device *ofdev, int input, int speed)  in rgmii_set_speed()  argument
110 	struct rgmii_regs __iomem *p = dev->base;  in rgmii_set_speed()
113 	mutex_lock(&dev->lock);  in rgmii_set_speed()
115 	ssr = in_be32(&p->ssr) & ~RGMII_SSR_MASK(input);  in rgmii_set_speed()
117 	RGMII_DBG(dev, "speed(%d, %d)" NL, input, speed);  in rgmii_set_speed()
120 		ssr |= RGMII_SSR_1000(input);  in rgmii_set_speed()
122 		ssr |= RGMII_SSR_100(input);  in rgmii_set_speed()
124 		ssr |= RGMII_SSR_10(input);  in rgmii_set_speed()
126 	out_be32(&p->ssr, ssr);  in rgmii_set_speed()
128 	mutex_unlock(&dev->lock);  in rgmii_set_speed()
131 void rgmii_get_mdio(struct platform_device *ofdev, int input)  in rgmii_get_mdio()  argument
134 	struct rgmii_regs __iomem *p = dev->base;  in rgmii_get_mdio()
137 	RGMII_DBG2(dev, "get_mdio(%d)" NL, input);  in rgmii_get_mdio()
139 	if (!(dev->flags & EMAC_RGMII_FLAG_HAS_MDIO))  in rgmii_get_mdio()
142 	mutex_lock(&dev->lock);  in rgmii_get_mdio()
144 	fer = in_be32(&p->fer);  in rgmii_get_mdio()
145 	fer |= 0x00080000u >> input;  in rgmii_get_mdio()
146 	out_be32(&p->fer, fer);  in rgmii_get_mdio()
147 	(void)in_be32(&p->fer);  in rgmii_get_mdio()
152 void rgmii_put_mdio(struct platform_device *ofdev, int input)  in rgmii_put_mdio()  argument
155 	struct rgmii_regs __iomem *p = dev->base;  in rgmii_put_mdio()
158 	RGMII_DBG2(dev, "put_mdio(%d)" NL, input);  in rgmii_put_mdio()
160 	if (!(dev->flags & EMAC_RGMII_FLAG_HAS_MDIO))  in rgmii_put_mdio()
163 	fer = in_be32(&p->fer);  in rgmii_put_mdio()
164 	fer &= ~(0x00080000u >> input);  in rgmii_put_mdio()
165 	out_be32(&p->fer, fer);  in rgmii_put_mdio()
166 	(void)in_be32(&p->fer);  in rgmii_put_mdio()
170 	mutex_unlock(&dev->lock);  in rgmii_put_mdio()
173 void rgmii_detach(struct platform_device *ofdev, int input)  in rgmii_detach()  argument
178 	BUG_ON(!dev || dev->users == 0);  in rgmii_detach()
179 	p = dev->base;  in rgmii_detach()
181 	mutex_lock(&dev->lock);  in rgmii_detach()
183 	RGMII_DBG(dev, "detach(%d)" NL, input);  in rgmii_detach()
185 	/* Disable this input */  in rgmii_detach()
186 	out_be32(&p->fer, in_be32(&p->fer) & ~RGMII_FER_MASK(input));  in rgmii_detach()
188 	--dev->users;  in rgmii_detach()
190 	mutex_unlock(&dev->lock);  in rgmii_detach()
205 	hdr->version = 0;  in rgmii_dump_regs()
206 	hdr->index = 0; /* for now, are there chips with more than one  in rgmii_dump_regs()
210 	memcpy_fromio(regs, dev->base, sizeof(struct rgmii_regs));  in rgmii_dump_regs()
217 	struct device_node *np = ofdev->dev.of_node;  in rgmii_probe()
222 	rc = -ENOMEM;  in rgmii_probe()
227 	mutex_init(&dev->lock);  in rgmii_probe()
228 	dev->ofdev = ofdev;  in rgmii_probe()
230 	rc = -ENXIO;  in rgmii_probe()
236 	rc = -ENOMEM;  in rgmii_probe()
237 	dev->base = (struct rgmii_regs __iomem *)ioremap(regs.start,  in rgmii_probe()
239 	if (dev->base == NULL) {  in rgmii_probe()
245 	if (of_get_property(ofdev->dev.of_node, "has-mdio", NULL))  in rgmii_probe()
246 		dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO;  in rgmii_probe()
249 	if (of_device_is_compatible(ofdev->dev.of_node, "ibm,rgmii-axon"))  in rgmii_probe()
250 		dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO;  in rgmii_probe()
253 	     in_be32(&dev->base->fer), in_be32(&dev->base->ssr));  in rgmii_probe()
256 	out_be32(&dev->base->fer, 0);  in rgmii_probe()
260 	       ofdev->dev.of_node,  in rgmii_probe()
261 	       (dev->flags & EMAC_RGMII_FLAG_HAS_MDIO) ? "" : "out");  in rgmii_probe()
278 	WARN_ON(dev->users != 0);  in rgmii_remove()
280 	iounmap(dev->base);  in rgmii_remove()
292 		.type		= "emac-rgmii",
299 		.name = "emac-rgmii",