1 // SPDX-License-Identifier: GPL-2.0
3  * Texas Instruments DA8xx/OMAP-L1x "glue layer"
5  * Copyright (c) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
7  * Based on the DaVinci "glue layer" code.
8  * Copyright (C) 2005-2006 by Texas Instruments
23 #include <linux/dma-mapping.h>
24 #include <linux/usb/usb_phy_generic.h>
32 /* USB 2.0 OTG module registers */
46 #define DA8XX_USB_GENERIC_RNDIS_EP_SIZE_REG(n) (0x50 + (((n) - 1) << 2))
54 /* USB interrupt register bits */
76  *	- not read/write INTRUSB/INTRUSBE (except during
78  *	- use INTSET/INTCLR instead.
82  * da8xx_musb_enable - enable interrupts
86 	void __iomem *reg_base = musb->ctrl_base;  in da8xx_musb_enable()
90 	mask = ((musb->epmask & DA8XX_USB_TX_EP_MASK) << DA8XX_INTR_TX_SHIFT) |  in da8xx_musb_enable()
91 	       ((musb->epmask & DA8XX_USB_RX_EP_MASK) << DA8XX_INTR_RX_SHIFT) |  in da8xx_musb_enable()
101  * da8xx_musb_disable - disable HDRC and flush interrupts
105 	void __iomem *reg_base = musb->ctrl_base;  in da8xx_musb_disable()
125 	void __iomem		*mregs = musb->mregs;  in otg_timer()
130 	 * We poll because DaVinci's won't expose several OTG-critical  in otg_timer()
134 	dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,  in otg_timer()
135 		usb_otg_state_string(musb->xceiv->otg->state));  in otg_timer()
137 	spin_lock_irqsave(&musb->lock, flags);  in otg_timer()
138 	switch (musb->xceiv->otg->state) {  in otg_timer()
141 		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);  in otg_timer()
143 		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);  in otg_timer()
145 			musb->xceiv->otg->state = OTG_STATE_B_IDLE;  in otg_timer()
148 			musb->xceiv->otg->state = OTG_STATE_A_IDLE;  in otg_timer()
155 		 * RTL seems to mis-handle session "start" otherwise (or in  in otg_timer()
160 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in otg_timer()
163 		musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;  in otg_timer()
164 		musb_writel(musb->ctrl_base, DA8XX_USB_INTR_SRC_SET_REG,  in otg_timer()
169 		 * There's no ID-changed IRQ, so we have no good way to tell  in otg_timer()
170 		 * when to switch to the A-Default state machine (by setting  in otg_timer()
175 		 * grounded and we're now in the A-Default state machine.  in otg_timer()
183 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in otg_timer()
185 			musb->xceiv->otg->state = OTG_STATE_A_IDLE;  in otg_timer()
190 	spin_unlock_irqrestore(&musb->lock, flags);  in otg_timer()
201 	if (musb->is_active || (musb->a_wait_bcon == 0 &&  in da8xx_musb_try_idle()
202 				musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON)) {  in da8xx_musb_try_idle()
203 		dev_dbg(musb->controller, "%s active, deleting timer\n",  in da8xx_musb_try_idle()
204 			usb_otg_state_string(musb->xceiv->otg->state));  in da8xx_musb_try_idle()
205 		del_timer(&musb->dev_timer);  in da8xx_musb_try_idle()
210 	if (time_after(last_timer, timeout) && timer_pending(&musb->dev_timer)) {  in da8xx_musb_try_idle()
211 		dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n");  in da8xx_musb_try_idle()
216 	dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",  in da8xx_musb_try_idle()
217 		usb_otg_state_string(musb->xceiv->otg->state),  in da8xx_musb_try_idle()
218 		jiffies_to_msecs(timeout - jiffies));  in da8xx_musb_try_idle()
219 	mod_timer(&musb->dev_timer, timeout);  in da8xx_musb_try_idle()
225 	void __iomem		*reg_base = musb->ctrl_base;  in da8xx_musb_interrupt()
230 	spin_lock_irqsave(&musb->lock, flags);  in da8xx_musb_interrupt()
237 	/* Acknowledge and handle non-CPPI interrupts */  in da8xx_musb_interrupt()
243 	dev_dbg(musb->controller, "USB IRQ %08x\n", status);  in da8xx_musb_interrupt()
245 	musb->int_rx = (status & DA8XX_INTR_RX_MASK) >> DA8XX_INTR_RX_SHIFT;  in da8xx_musb_interrupt()
246 	musb->int_tx = (status & DA8XX_INTR_TX_MASK) >> DA8XX_INTR_TX_SHIFT;  in da8xx_musb_interrupt()
247 	musb->int_usb = (status & DA8XX_INTR_USB_MASK) >> DA8XX_INTR_USB_SHIFT;  in da8xx_musb_interrupt()
259 		void __iomem *mregs = musb->mregs;  in da8xx_musb_interrupt()
263 		err = musb->int_usb & MUSB_INTR_VBUSERROR;  in da8xx_musb_interrupt()
268 			 * means it's not uncommon for bus-powered devices  in da8xx_musb_interrupt()
272 			 * seems to allow a better one: "re"-starting sessions  in da8xx_musb_interrupt()
276 			musb->int_usb &= ~MUSB_INTR_VBUSERROR;  in da8xx_musb_interrupt()
277 			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;  in da8xx_musb_interrupt()
278 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in da8xx_musb_interrupt()
282 			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;  in da8xx_musb_interrupt()
283 			portstate(musb->port1_status |= USB_PORT_STAT_POWER);  in da8xx_musb_interrupt()
284 			del_timer(&musb->dev_timer);  in da8xx_musb_interrupt()
285 		} else if (!(musb->int_usb & MUSB_INTR_BABBLE)) {  in da8xx_musb_interrupt()
290 			 * controller; otherwise, the host-mode flag is lost  in da8xx_musb_interrupt()
294 			musb->is_active = 0;  in da8xx_musb_interrupt()
296 			musb->xceiv->otg->state = OTG_STATE_B_IDLE;  in da8xx_musb_interrupt()
297 			portstate(musb->port1_status &= ~USB_PORT_STAT_POWER);  in da8xx_musb_interrupt()
300 		dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",  in da8xx_musb_interrupt()
302 				usb_otg_state_string(musb->xceiv->otg->state),  in da8xx_musb_interrupt()
308 	if (musb->int_tx || musb->int_rx || musb->int_usb)  in da8xx_musb_interrupt()
312 	/* EOI needs to be written for the IRQ to be re-asserted. */  in da8xx_musb_interrupt()
317 	if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)  in da8xx_musb_interrupt()
318 		mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in da8xx_musb_interrupt()
320 	spin_unlock_irqrestore(&musb->lock, flags);  in da8xx_musb_interrupt()
327 	struct da8xx_glue *glue = dev_get_drvdata(musb->controller->parent);  in da8xx_musb_set_mode()  local
334 	if (!musb->is_initialized)  in da8xx_musb_set_mode()
335 		return phy_set_mode(glue->phy, PHY_MODE_USB_OTG);  in da8xx_musb_set_mode()
348 		return -EINVAL;  in da8xx_musb_set_mode()
351 	return phy_set_mode(glue->phy, phy_mode);  in da8xx_musb_set_mode()
356 	struct da8xx_glue *glue = dev_get_drvdata(musb->controller->parent);  in da8xx_musb_init()  local
357 	void __iomem *reg_base = musb->ctrl_base;  in da8xx_musb_init()
359 	int ret = -ENODEV;  in da8xx_musb_init()
361 	musb->mregs += DA8XX_MENTOR_CORE_OFFSET;  in da8xx_musb_init()
363 	ret = clk_prepare_enable(glue->clk);  in da8xx_musb_init()
365 		dev_err(glue->dev, "failed to enable clock\n");  in da8xx_musb_init()
374 	musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);  in da8xx_musb_init()
375 	if (IS_ERR_OR_NULL(musb->xceiv)) {  in da8xx_musb_init()
376 		ret = -EPROBE_DEFER;  in da8xx_musb_init()
380 	timer_setup(&musb->dev_timer, otg_timer, 0);  in da8xx_musb_init()
385 	/* Start the on-chip PHY and its PLL. */  in da8xx_musb_init()
386 	ret = phy_init(glue->phy);  in da8xx_musb_init()
388 		dev_err(glue->dev, "Failed to init phy.\n");  in da8xx_musb_init()
392 	ret = phy_power_on(glue->phy);  in da8xx_musb_init()
394 		dev_err(glue->dev, "Failed to power on phy.\n");  in da8xx_musb_init()
404 	musb->isr = da8xx_musb_interrupt;  in da8xx_musb_init()
408 	phy_exit(glue->phy);  in da8xx_musb_init()
410 	clk_disable_unprepare(glue->clk);  in da8xx_musb_init()
416 	struct da8xx_glue *glue = dev_get_drvdata(musb->controller->parent);  in da8xx_musb_exit()  local
418 	del_timer_sync(&musb->dev_timer);  in da8xx_musb_exit()
420 	phy_power_off(glue->phy);  in da8xx_musb_exit()
421 	phy_exit(glue->phy);  in da8xx_musb_exit()
422 	clk_disable_unprepare(glue->clk);  in da8xx_musb_exit()
424 	usb_put_phy(musb->xceiv);  in da8xx_musb_exit()
447 	struct musb *musb = c->musb;  in da8xx_dma_controller_callback()
448 	void __iomem *reg_base = musb->ctrl_base;  in da8xx_dma_controller_callback()
462 	controller->dma_callback = da8xx_dma_controller_callback;  in da8xx_dma_controller_create()
489 	.name		= "musb-hdrc",
501 	OF_DEV_AUXDATA("ti,da830-cppi41", 0x01e01000, "cppi41-dmaengine",
508 	struct musb_hdrc_platform_data	*pdata = dev_get_platdata(&pdev->dev);  in da8xx_probe()
509 	struct da8xx_glue		*glue;  in da8xx_probe()  local
512 	struct device_node		*np = pdev->dev.of_node;  in da8xx_probe()
515 	glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);  in da8xx_probe()
516 	if (!glue)  in da8xx_probe()
517 		return -ENOMEM;  in da8xx_probe()
519 	clk = devm_clk_get(&pdev->dev, NULL);  in da8xx_probe()
521 		dev_err(&pdev->dev, "failed to get clock\n");  in da8xx_probe()
525 	glue->phy = devm_phy_get(&pdev->dev, "usb-phy");  in da8xx_probe()
526 	if (IS_ERR(glue->phy))  in da8xx_probe()
527 		return dev_err_probe(&pdev->dev, PTR_ERR(glue->phy),  in da8xx_probe()
530 	glue->dev			= &pdev->dev;  in da8xx_probe()
531 	glue->clk			= clk;  in da8xx_probe()
534 		pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);  in da8xx_probe()
536 			return -ENOMEM;  in da8xx_probe()
538 		pdata->config	= &da8xx_config;  in da8xx_probe()
539 		pdata->mode	= musb_get_mode(&pdev->dev);  in da8xx_probe()
540 		pdata->power	= get_vbus_power(&pdev->dev);  in da8xx_probe()
543 	pdata->platform_ops		= &da8xx_ops;  in da8xx_probe()
545 	glue->usb_phy = usb_phy_generic_register();  in da8xx_probe()
546 	ret = PTR_ERR_OR_ZERO(glue->usb_phy);  in da8xx_probe()
548 		dev_err(&pdev->dev, "failed to register usb_phy\n");  in da8xx_probe()
551 	platform_set_drvdata(pdev, glue);  in da8xx_probe()
553 	ret = of_platform_populate(pdev->dev.of_node, NULL,  in da8xx_probe()
554 				   da8xx_auxdata_lookup, &pdev->dev);  in da8xx_probe()
559 	pinfo.parent = &pdev->dev;  in da8xx_probe()
560 	pinfo.res = pdev->resource;  in da8xx_probe()
561 	pinfo.num_res = pdev->num_resources;  in da8xx_probe()
567 	glue->musb = platform_device_register_full(&pinfo);  in da8xx_probe()
568 	ret = PTR_ERR_OR_ZERO(glue->musb);  in da8xx_probe()
570 		dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);  in da8xx_probe()
571 		usb_phy_generic_unregister(glue->usb_phy);  in da8xx_probe()
579 	struct da8xx_glue		*glue = platform_get_drvdata(pdev);  in da8xx_remove()  local
581 	platform_device_unregister(glue->musb);  in da8xx_remove()
582 	usb_phy_generic_unregister(glue->usb_phy);  in da8xx_remove()
591 	struct da8xx_glue *glue = dev_get_drvdata(dev);  in da8xx_suspend()  local
593 	ret = phy_power_off(glue->phy);  in da8xx_suspend()
596 	clk_disable_unprepare(glue->clk);  in da8xx_suspend()
604 	struct da8xx_glue *glue = dev_get_drvdata(dev);  in da8xx_resume()  local
606 	ret = clk_prepare_enable(glue->clk);  in da8xx_resume()
609 	return phy_power_on(glue->phy);  in da8xx_resume()
618 		.compatible = "ti,da830-musb",
629 		.name	= "musb-da8xx",
635 MODULE_DESCRIPTION("DA8xx/OMAP-L1x MUSB Glue Layer");