1 // SPDX-License-Identifier: GPL-2.0+
3  * Ingenic JZ4740 "glue layer"
9 #include <linux/dma-mapping.h>
23 	struct musb		*musb;  member
32 	struct musb	*musb = __hci;  in jz4740_musb_interrupt()  local
34 	if (IS_ENABLED(CONFIG_USB_INVENTRA_DMA) && musb->dma_controller)  in jz4740_musb_interrupt()
35 		retval_dma = dma_controller_irq(irq, musb->dma_controller);  in jz4740_musb_interrupt()
37 	spin_lock_irqsave(&musb->lock, flags);  in jz4740_musb_interrupt()
39 	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);  in jz4740_musb_interrupt()
40 	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);  in jz4740_musb_interrupt()
41 	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);  in jz4740_musb_interrupt()
45 	 * undefined. Mask them to make sure that the musb driver core will  in jz4740_musb_interrupt()
48 	musb->int_usb &= MUSB_INTR_SUSPEND | MUSB_INTR_RESUME |  in jz4740_musb_interrupt()
51 	if (musb->int_usb || musb->int_tx || musb->int_rx)  in jz4740_musb_interrupt()
52 		retval = musb_interrupt(musb);  in jz4740_musb_interrupt()
54 	spin_unlock_irqrestore(&musb->lock, flags);  in jz4740_musb_interrupt()
83 	struct usb_phy *phy = glue->musb->xceiv;  in jz4740_musb_role_switch_set()
90 		atomic_notifier_call_chain(&phy->notifier, USB_EVENT_NONE, phy);  in jz4740_musb_role_switch_set()
93 		atomic_notifier_call_chain(&phy->notifier, USB_EVENT_VBUS, phy);  in jz4740_musb_role_switch_set()
96 		atomic_notifier_call_chain(&phy->notifier, USB_EVENT_ID, phy);  in jz4740_musb_role_switch_set()
103 static int jz4740_musb_init(struct musb *musb)  in jz4740_musb_init()  argument
105 	struct device *dev = musb->controller->parent;  in jz4740_musb_init()
114 	glue->musb = musb;  in jz4740_musb_init()
117 		musb->phy = devm_of_phy_get_by_index(dev, dev->of_node, 0);  in jz4740_musb_init()
118 		if (IS_ERR(musb->phy)) {  in jz4740_musb_init()
119 			err = PTR_ERR(musb->phy);  in jz4740_musb_init()
120 			if (err != -ENODEV) {  in jz4740_musb_init()
125 			musb->phy = NULL;  in jz4740_musb_init()
129 	if (musb->phy) {  in jz4740_musb_init()
130 		err = phy_init(musb->phy);  in jz4740_musb_init()
136 		err = phy_power_on(musb->phy);  in jz4740_musb_init()
142 		if (dev->of_node)  in jz4740_musb_init()
143 			musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0);  in jz4740_musb_init()
145 			musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);  in jz4740_musb_init()
146 		if (IS_ERR(musb->xceiv)) {  in jz4740_musb_init()
148 			return PTR_ERR(musb->xceiv);  in jz4740_musb_init()
152 	glue->role_sw = usb_role_switch_register(dev, &role_sw_desc);  in jz4740_musb_init()
153 	if (IS_ERR(glue->role_sw)) {  in jz4740_musb_init()
155 		err = PTR_ERR(glue->role_sw);  in jz4740_musb_init()
163 	musb->dyn_fifo = true;  in jz4740_musb_init()
165 	musb->isr = jz4740_musb_interrupt;  in jz4740_musb_init()
170 	if (musb->phy)  in jz4740_musb_init()
171 		phy_power_off(musb->phy);  in jz4740_musb_init()
173 	if (musb->phy)  in jz4740_musb_init()
174 		phy_exit(musb->phy);  in jz4740_musb_init()
178 static int jz4740_musb_exit(struct musb *musb)  in jz4740_musb_exit()  argument
180 	struct jz4740_glue *glue = dev_get_drvdata(musb->controller->parent);  in jz4740_musb_exit()
182 	usb_role_switch_unregister(glue->role_sw);  in jz4740_musb_exit()
183 	if (musb->phy) {  in jz4740_musb_exit()
184 		phy_power_off(musb->phy);  in jz4740_musb_exit()
185 		phy_exit(musb->phy);  in jz4740_musb_exit()
237 	struct device			*dev = &pdev->dev;  in jz4740_probe()
239 	struct platform_device		*musb;  in jz4740_probe()  local
246 		return -ENOMEM;  in jz4740_probe()
251 		return -EINVAL;  in jz4740_probe()
254 	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);  in jz4740_probe()
255 	if (!musb) {  in jz4740_probe()
256 		dev_err(dev, "failed to allocate musb device\n");  in jz4740_probe()
257 		return -ENOMEM;  in jz4740_probe()
273 	musb->dev.parent		= dev;  in jz4740_probe()
274 	musb->dev.dma_mask		= &musb->dev.coherent_dma_mask;  in jz4740_probe()
275 	musb->dev.coherent_dma_mask	= DMA_BIT_MASK(32);  in jz4740_probe()
276 	device_set_of_node_from_dev(&musb->dev, dev);  in jz4740_probe()
278 	glue->pdev			= musb;  in jz4740_probe()
279 	glue->clk			= clk;  in jz4740_probe()
283 	ret = platform_device_add_resources(musb, pdev->resource,  in jz4740_probe()
284 					    pdev->num_resources);  in jz4740_probe()
290 	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));  in jz4740_probe()
296 	ret = platform_device_add(musb);  in jz4740_probe()
298 		dev_err(dev, "failed to register musb device\n");  in jz4740_probe()
307 	platform_device_put(musb);  in jz4740_probe()
315 	platform_device_unregister(glue->pdev);  in jz4740_remove()
316 	clk_disable_unprepare(glue->clk);  in jz4740_remove()
320 	{ .compatible = "ingenic,jz4740-musb", .data = &jz4740_musb_pdata },
321 	{ .compatible = "ingenic,jz4770-musb", .data = &jz4770_musb_pdata },
330 		.name	= "musb-jz4740",
335 MODULE_DESCRIPTION("JZ4740 MUSB Glue Layer");