1 // SPDX-License-Identifier: GPL-2.0+
3  * Ingenic JZ4740 "glue layer"
9 #include <linux/dma-mapping.h>
15 #include <linux/usb/role.h>
16 #include <linux/usb/usb_phy_generic.h>
33 	if (IS_ENABLED(CONFIG_USB_INVENTRA_DMA) && musb->dma_controller)  in jz4740_musb_interrupt()
34 		retval_dma = dma_controller_irq(irq, musb->dma_controller);  in jz4740_musb_interrupt()
36 	spin_lock_irqsave(&musb->lock, flags);  in jz4740_musb_interrupt()
38 	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);  in jz4740_musb_interrupt()
39 	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);  in jz4740_musb_interrupt()
40 	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);  in jz4740_musb_interrupt()
47 	musb->int_usb &= MUSB_INTR_SUSPEND | MUSB_INTR_RESUME |  in jz4740_musb_interrupt()
50 	if (musb->int_usb || musb->int_tx || musb->int_rx)  in jz4740_musb_interrupt()
53 	spin_unlock_irqrestore(&musb->lock, flags);  in jz4740_musb_interrupt()
68 	/* Silicon does not implement USB OTG. */
81 	struct jz4740_glue *glue = usb_role_switch_get_drvdata(sw);  in jz4740_musb_role_switch_set()  local
82 	struct usb_phy *phy = glue->musb->xceiv;  in jz4740_musb_role_switch_set()
86 		atomic_notifier_call_chain(&phy->notifier, USB_EVENT_NONE, phy);  in jz4740_musb_role_switch_set()
89 		atomic_notifier_call_chain(&phy->notifier, USB_EVENT_VBUS, phy);  in jz4740_musb_role_switch_set()
92 		atomic_notifier_call_chain(&phy->notifier, USB_EVENT_ID, phy);  in jz4740_musb_role_switch_set()
101 	struct device *dev = musb->controller->parent;  in jz4740_musb_init()
102 	struct jz4740_glue *glue = dev_get_drvdata(dev);  in jz4740_musb_init()  local
105 		.driver_data = glue,  in jz4740_musb_init()
110 	glue->musb = musb;  in jz4740_musb_init()
112 	if (dev->of_node)  in jz4740_musb_init()
113 		musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0);  in jz4740_musb_init()
115 		musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);  in jz4740_musb_init()
116 	if (IS_ERR(musb->xceiv)) {  in jz4740_musb_init()
117 		err = PTR_ERR(musb->xceiv);  in jz4740_musb_init()
118 		if (err != -EPROBE_DEFER)  in jz4740_musb_init()
123 	glue->role_sw = usb_role_switch_register(dev, &role_sw_desc);  in jz4740_musb_init()
124 	if (IS_ERR(glue->role_sw)) {  in jz4740_musb_init()
125 		dev_err(dev, "Failed to register USB role switch");  in jz4740_musb_init()
126 		return PTR_ERR(glue->role_sw);  in jz4740_musb_init()
133 	musb->dyn_fifo = true;  in jz4740_musb_init()
135 	musb->isr = jz4740_musb_interrupt;  in jz4740_musb_init()
142 	struct jz4740_glue *glue = dev_get_drvdata(musb->controller->parent);  in jz4740_musb_exit()  local
144 	usb_role_switch_unregister(glue->role_sw);  in jz4740_musb_exit()
195 	struct device			*dev = &pdev->dev;  in jz4740_probe()
198 	struct jz4740_glue		*glue;  in jz4740_probe()  local
202 	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);  in jz4740_probe()
203 	if (!glue)  in jz4740_probe()
204 		return -ENOMEM;  in jz4740_probe()
209 		return -EINVAL;  in jz4740_probe()
212 	musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);  in jz4740_probe()
215 		return -ENOMEM;  in jz4740_probe()
231 	musb->dev.parent		= dev;  in jz4740_probe()
232 	musb->dev.dma_mask		= &musb->dev.coherent_dma_mask;  in jz4740_probe()
233 	musb->dev.coherent_dma_mask	= DMA_BIT_MASK(32);  in jz4740_probe()
235 	glue->pdev			= musb;  in jz4740_probe()
236 	glue->clk			= clk;  in jz4740_probe()
238 	platform_set_drvdata(pdev, glue);  in jz4740_probe()
240 	ret = platform_device_add_resources(musb, pdev->resource,  in jz4740_probe()
241 					    pdev->num_resources);  in jz4740_probe()
270 	struct jz4740_glue *glue = platform_get_drvdata(pdev);  in jz4740_remove()  local
272 	platform_device_unregister(glue->pdev);  in jz4740_remove()
273 	clk_disable_unprepare(glue->clk);  in jz4740_remove()
279 	{ .compatible = "ingenic,jz4740-musb", .data = &jz4740_musb_pdata },
280 	{ .compatible = "ingenic,jz4770-musb", .data = &jz4770_musb_pdata },
289 		.name	= "musb-jz4740",
294 MODULE_DESCRIPTION("JZ4740 MUSB Glue Layer");