1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2005-2006 by Texas Instruments
18 #include <linux/dma-mapping.h>
24 #include <asm/mach-types.h>
54 	/* power everything up; start the on-chip PHY and its PLL */  in phy_on()
68 	/* powerdown the on-chip PHY, its PLL, and the OTG block */  in phy_off()
81 	tmp = (musb->epmask & DAVINCI_USB_TX_ENDPTS_MASK)  in davinci_musb_enable()
83 	musb_writel(musb->ctrl_base, DAVINCI_USB_INT_MASK_SET_REG, tmp);  in davinci_musb_enable()
85 	tmp = (musb->epmask & (0xfffe & DAVINCI_USB_RX_ENDPTS_MASK))  in davinci_musb_enable()
87 	musb_writel(musb->ctrl_base, DAVINCI_USB_INT_MASK_SET_REG, tmp);  in davinci_musb_enable()
92 	musb_writel(musb->ctrl_base, DAVINCI_USB_INT_MASK_SET_REG, tmp);  in davinci_musb_enable()
101 	musb_writel(musb->ctrl_base, DAVINCI_USB_INT_SET_REG,  in davinci_musb_enable()
111 	 *  - not read/write INTRUSB/INTRUSBE  in davinci_musb_disable()
112 	 *  - (except during initial setup, as workaround)  in davinci_musb_disable()
113 	 *  - use INTSETR/INTCLRR instead  in davinci_musb_disable()
115 	musb_writel(musb->ctrl_base, DAVINCI_USB_INT_MASK_CLR_REG,  in davinci_musb_disable()
119 	musb_writel(musb->ctrl_base, DAVINCI_USB_EOI_REG, 0);  in davinci_musb_disable()
129  * VBUS SWITCHING IS BOARD-SPECIFIC ... at least for the DM6446 EVM,
146 	gpiod_set_value_cansleep(glue->vbus, glue->vbus_state);  in evm_deferred_drvvbus()
147 	glue->vbus_state = !glue->vbus_state;  in evm_deferred_drvvbus()
153 	struct davinci_glue *glue = dev_get_drvdata(musb->controller->parent);  in davinci_musb_source_power()
156 	if (!glue->vbus)  in davinci_musb_source_power()
162 	if (glue->vbus_state == is_on)  in davinci_musb_source_power()
164 	/* 0/1 vs "-1 == unknown/init" */  in davinci_musb_source_power()
165 	glue->vbus_state = !is_on;  in davinci_musb_source_power()
169 			gpiod_set_value_cansleep(glue->vbus, glue->vbus_state);  in davinci_musb_source_power()
171 			schedule_work(&glue->vbus_work);  in davinci_musb_source_power()
174 		glue->vbus_state = is_on;  in davinci_musb_source_power()
189 	void __iomem		*mregs = musb->mregs;  in otg_timer()
193 	/* We poll because DaVinci's won't expose several OTG-critical  in otg_timer()
197 	dev_dbg(musb->controller, "poll devctl %02x (%s)\n", devctl,  in otg_timer()
198 		usb_otg_state_string(musb->xceiv->otg->state));  in otg_timer()
200 	spin_lock_irqsave(&musb->lock, flags);  in otg_timer()
201 	switch (musb->xceiv->otg->state) {  in otg_timer()
204 		 * seems to mis-handle session "start" otherwise (or in our  in otg_timer()
209 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in otg_timer()
212 		musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;  in otg_timer()
213 		musb_writel(musb->ctrl_base, DAVINCI_USB_INT_SET_REG,  in otg_timer()
218 		 * There's no ID-changed IRQ, so we have no good way to tell  in otg_timer()
219 		 * when to switch to the A-Default state machine (by setting  in otg_timer()
222 		 * Workaround:  whenever we're in B_IDLE, try setting the  in otg_timer()
224 		 * grounded and we're now in the A-Default state machine.  in otg_timer()
233 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in otg_timer()
235 			musb->xceiv->otg->state = OTG_STATE_A_IDLE;  in otg_timer()
240 	spin_unlock_irqrestore(&musb->lock, flags);  in otg_timer()
248 	struct usb_otg	*otg = musb->xceiv->otg;  in davinci_musb_interrupt()
249 	void __iomem	*tibase = musb->ctrl_base;  in davinci_musb_interrupt()
253 	spin_lock_irqsave(&musb->lock, flags);  in davinci_musb_interrupt()
267 	cppi = container_of(musb->dma_controller, struct cppi, controller);  in davinci_musb_interrupt()
268 	if (is_cppi_enabled(musb) && musb->dma_controller && !cppi->irq)  in davinci_musb_interrupt()
271 	/* ack and handle non-CPPI interrupts */  in davinci_musb_interrupt()
274 	dev_dbg(musb->controller, "IRQ %08x\n", tmp);  in davinci_musb_interrupt()
276 	musb->int_rx = (tmp & DAVINCI_USB_RXINT_MASK)  in davinci_musb_interrupt()
278 	musb->int_tx = (tmp & DAVINCI_USB_TXINT_MASK)  in davinci_musb_interrupt()
280 	musb->int_usb = (tmp & DAVINCI_USB_USBINT_MASK)  in davinci_musb_interrupt()
292 		void __iomem *mregs = musb->mregs;  in davinci_musb_interrupt()
294 		int	err = musb->int_usb & MUSB_INTR_VBUSERROR;  in davinci_musb_interrupt()
296 		err = musb->int_usb & MUSB_INTR_VBUSERROR;  in davinci_musb_interrupt()
300 			 * means it's not uncommon for bus-powered devices  in davinci_musb_interrupt()
304 			 * seems to allow a better one: "re"starting sessions  in davinci_musb_interrupt()
308 			musb->int_usb &= ~MUSB_INTR_VBUSERROR;  in davinci_musb_interrupt()
309 			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;  in davinci_musb_interrupt()
310 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in davinci_musb_interrupt()
314 			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;  in davinci_musb_interrupt()
315 			portstate(musb->port1_status |= USB_PORT_STAT_POWER);  in davinci_musb_interrupt()
316 			del_timer(&musb->dev_timer);  in davinci_musb_interrupt()
318 			musb->is_active = 0;  in davinci_musb_interrupt()
320 			musb->xceiv->otg->state = OTG_STATE_B_IDLE;  in davinci_musb_interrupt()
321 			portstate(musb->port1_status &= ~USB_PORT_STAT_POWER);  in davinci_musb_interrupt()
328 		dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",  in davinci_musb_interrupt()
330 				usb_otg_state_string(musb->xceiv->otg->state),  in davinci_musb_interrupt()
336 	if (musb->int_tx || musb->int_rx || musb->int_usb)  in davinci_musb_interrupt()
343 	if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)  in davinci_musb_interrupt()
344 		mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in davinci_musb_interrupt()
346 	spin_unlock_irqrestore(&musb->lock, flags);  in davinci_musb_interrupt()
354 	return -EIO;  in davinci_musb_set_mode()
359 	void __iomem	*tibase = musb->ctrl_base;  in davinci_musb_init()
361 	int 		ret = -ENODEV;  in davinci_musb_init()
363 	musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);  in davinci_musb_init()
364 	if (IS_ERR_OR_NULL(musb->xceiv)) {  in davinci_musb_init()
365 		ret = -EPROBE_DEFER;  in davinci_musb_init()
369 	musb->mregs += DAVINCI_BASE_OFFSET;  in davinci_musb_init()
371 	/* returns zero if e.g. not clocked */  in davinci_musb_init()
376 	timer_setup(&musb->dev_timer, otg_timer, 0);  in davinci_musb_init()
380 	/* dm355 EVM swaps D+/D- for signal integrity, and  in davinci_musb_init()
381 	 * is clocked from the main 24 MHz crystal.  in davinci_musb_init()
391 	/* On dm355, the default-A state machine needs DRVVBUS control.  in davinci_musb_init()
404 	/* start the on-chip PHY and its PLL */  in davinci_musb_init()
409 	/* NOTE:  irqs are in mixed mode, not bypass to pure-musb */  in davinci_musb_init()
414 	musb->isr = davinci_musb_interrupt;  in davinci_musb_init()
418 	usb_put_phy(musb->xceiv);  in davinci_musb_init()
429 	del_timer_sync(&musb->dev_timer);  in davinci_musb_exit()
448 		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);  in davinci_musb_exit()
453 			dev_dbg(musb->controller, "VBUS %d\n",  in davinci_musb_exit()
457 		maxdelay--;  in davinci_musb_exit()
462 		dev_dbg(musb->controller, "VBUS off timeout (devctl %02x)\n", devctl);  in davinci_musb_exit()
466 	usb_put_phy(musb->xceiv);  in davinci_musb_exit()
489 	.name		= "musb-hdrc",
497 	struct musb_hdrc_platform_data	*pdata = dev_get_platdata(&pdev->dev);  in davinci_probe()
503 	int				ret = -ENOMEM;  in davinci_probe()
505 	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);  in davinci_probe()
509 	clk = devm_clk_get(&pdev->dev, "usb");  in davinci_probe()
511 		dev_err(&pdev->dev, "failed to get clock\n");  in davinci_probe()
518 		dev_err(&pdev->dev, "failed to enable clock\n");  in davinci_probe()
522 	glue->dev			= &pdev->dev;  in davinci_probe()
523 	glue->clk			= clk;  in davinci_probe()
525 	pdata->platform_ops		= &davinci_ops;  in davinci_probe()
527 	glue->vbus = devm_gpiod_get_optional(&pdev->dev, NULL, GPIOD_OUT_LOW);  in davinci_probe()
528 	if (IS_ERR(glue->vbus)) {  in davinci_probe()
529 		ret = PTR_ERR(glue->vbus);  in davinci_probe()
532 		glue->vbus_state = -1;  in davinci_probe()
533 		INIT_WORK(&glue->vbus_work, evm_deferred_drvvbus);  in davinci_probe()
542 	musb_resources[0].name = pdev->resource[0].name;  in davinci_probe()
543 	musb_resources[0].start = pdev->resource[0].start;  in davinci_probe()
544 	musb_resources[0].end = pdev->resource[0].end;  in davinci_probe()
545 	musb_resources[0].flags = pdev->resource[0].flags;  in davinci_probe()
547 	musb_resources[1].name = pdev->resource[1].name;  in davinci_probe()
548 	musb_resources[1].start = pdev->resource[1].start;  in davinci_probe()
549 	musb_resources[1].end = pdev->resource[1].end;  in davinci_probe()
550 	musb_resources[1].flags = pdev->resource[1].flags;  in davinci_probe()
556 	musb_resources[2].name = pdev->resource[2].name;  in davinci_probe()
557 	musb_resources[2].start = pdev->resource[2].start;  in davinci_probe()
558 	musb_resources[2].end = pdev->resource[2].end;  in davinci_probe()
559 	musb_resources[2].flags = pdev->resource[2].flags;  in davinci_probe()
562 	pinfo.parent = &pdev->dev;  in davinci_probe()
568 	glue->musb = musb = platform_device_register_full(&pinfo);  in davinci_probe()
571 		dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);  in davinci_probe()
588 	platform_device_unregister(glue->musb);  in davinci_remove()
590 	clk_disable(glue->clk);  in davinci_remove()
599 		.name	= "musb-davinci",