1 // SPDX-License-Identifier: GPL-2.0
13 #include <linux/pcs-rzn1-miic.h>
17 #include <dt-bindings/net/pcs-rzn1-miic.h>
52 #define MIIC_MODCTRL_CONF_NONE		-1
55  * struct modctrl_match - Matching table entry for  convctrl configuration
58  * @conv: Configuration of ethernet port muxes. First index is SWITCH_PORTIN,
59  *	  then index 1 - 5 are CONV1 - CONV5.
63 	u8 conv[MIIC_MODCTRL_CONF_CONV_NUM];  member
122  * struct miic - MII converter structure
123  * @base: base address of the MII converter
124  * @dev: Device associated to the MII converter
125  * @lock: Lock used for read-modify-write access
134  * struct miic_port - Per port MII converter struct
135  * @miic: backiling to MII converter structure
154 	writel(value, miic->base + offset);  in miic_reg_writel()
159 	return readl(miic->base + offset);  in miic_reg_readl()
166 	spin_lock(&miic->lock);  in miic_reg_rmw()
173 	spin_unlock(&miic->lock);  in miic_reg_rmw()
191 	struct miic *miic = miic_port->miic;  in miic_config()
193 	int port = miic_port->port;  in miic_config()
209 		/* When in MII mode, speed should be set to 0 (which is actually  in miic_config()
215 		return -EOPNOTSUPP;  in miic_config()
225 	if (interface != miic_port->interface) {  in miic_config()
228 		miic_port->interface = interface;  in miic_config()
232 	miic_converter_enable(miic, miic_port->port, 1);  in miic_config()
241 	struct miic *miic = miic_port->miic;  in miic_link_up()
243 	int port = miic_port->port;  in miic_link_up()
248 	/* No speed in MII through-mode */  in miic_link_up()
274 	if (phy_interface_mode_is_rgmii(state->interface) ||  in miic_validate()
275 	    state->interface == PHY_INTERFACE_MODE_RMII ||  in miic_validate()
276 	    state->interface == PHY_INTERFACE_MODE_MII)  in miic_validate()
279 	return -EINVAL;  in miic_validate()
285 	struct miic *miic = miic_port->miic;  in miic_pre_init()
289 	if (pcs->rxc_always_on) {  in miic_pre_init()
290 		/* In MII through mode, the clock signals will be driven by the  in miic_pre_init()
295 		miic_port->interface = PHY_INTERFACE_MODE_RMII;  in miic_pre_init()
301 		miic_reg_rmw(miic, MIIC_CONVCTRL(miic_port->port), mask, val);  in miic_pre_init()
303 		miic_converter_enable(miic, miic_port->port, 1);  in miic_pre_init()
325 		return ERR_PTR(-ENODEV);  in miic_create()
328 		return ERR_PTR(-EINVAL);  in miic_create()
331 		return ERR_PTR(-EINVAL);  in miic_create()
336 		return ERR_PTR(-ENODEV);  in miic_create()
340 		return ERR_PTR(-ENODEV);  in miic_create()
347 			put_device(&pdev->dev);  in miic_create()
348 		return ERR_PTR(-EPROBE_DEFER);  in miic_create()
353 		put_device(&pdev->dev);  in miic_create()
354 		return ERR_PTR(-ENOMEM);  in miic_create()
358 	device_link_add(dev, miic->dev, DL_FLAG_AUTOREMOVE_CONSUMER);  in miic_create()
359 	put_device(&pdev->dev);  in miic_create()
361 	miic_port->miic = miic;  in miic_create()
362 	miic_port->port = port - 1;  in miic_create()
363 	miic_port->pcs.ops = &miic_phylink_ops;  in miic_create()
364 	miic_port->pcs.neg_mode = true;  in miic_create()
366 	return &miic_port->pcs;  in miic_create()
374 	miic_converter_enable(miic_port->miic, miic_port->port, 0);  in miic_destroy()
384 	 * is going to be used in conjunction with the Cortex-M3, this sequence  in miic_init_hw()
450 		if (miic_modctrl_match(table_entry->conv, dt_val)) {  in miic_match_dt_conf()
451 			*mode_cfg = table_entry->mode_cfg;  in miic_match_dt_conf()
459 	return -EINVAL;  in miic_match_dt_conf()
465 	struct device_node *np = dev->of_node;  in miic_parse_dt()
466 	struct device_node *conv;  in miic_parse_dt()  local
472 	if (of_property_read_u32(np, "renesas,miic-switch-portin", &conf) == 0)  in miic_parse_dt()
475 	for_each_child_of_node(np, conv) {  in miic_parse_dt()
476 		if (of_property_read_u32(conv, "reg", &port))  in miic_parse_dt()
479 		if (!of_device_is_available(conv))  in miic_parse_dt()
482 		if (of_property_read_u32(conv, "renesas,miic-input", &conf) == 0)  in miic_parse_dt()
491 	struct device *dev = &pdev->dev;  in miic_probe()
502 		return -ENOMEM;  in miic_probe()
504 	spin_lock_init(&miic->lock);  in miic_probe()
505 	miic->dev = dev;  in miic_probe()
506 	miic->base = devm_platform_ioremap_resource(pdev, 0);  in miic_probe()
507 	if (IS_ERR(miic->base))  in miic_probe()
508 		return PTR_ERR(miic->base);  in miic_probe()
539 	pm_runtime_put(&pdev->dev);  in miic_remove()
543 	{ .compatible = "renesas,rzn1-miic" },
560 MODULE_DESCRIPTION("Renesas MII converter PCS driver");