7  * Copyright (c) 2008-2009, MontaVista Software, Inc. <source@mvista.com>
11  * SPDX-License-Identifier:	GPL-2.0
22 #include <linux/dma-mapping.h>
28 #include "linux-compat.h"
36 /* USB 2.0 OTG module registers */
84 #define glue_to_musb(g)		platform_get_drvdata(g->musb)
87  * am35x_musb_enable - enable interrupts
95 	void __iomem *reg_base = musb->ctrl_base;  in am35x_musb_enable()
99 	epmask = ((musb->epmask & AM35X_TX_EP_MASK) << AM35X_INTR_TX_SHIFT) |  in am35x_musb_enable()
100 	       ((musb->epmask & AM35X_RX_EP_MASK) << AM35X_INTR_RX_SHIFT);  in am35x_musb_enable()
115  * am35x_musb_disable - disable HDRC and flush interrupts
119 	void __iomem *reg_base = musb->ctrl_base;  in am35x_musb_disable()
124 	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);  in am35x_musb_disable()
143 	void __iomem		*mregs = musb->mregs;  in otg_timer()
148 	 * We poll because AM35x's won't expose several OTG-critical  in otg_timer()
152 	dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,  in otg_timer()
153 		otg_state_string(musb->xceiv->state));  in otg_timer()
155 	spin_lock_irqsave(&musb->lock, flags);  in otg_timer()
156 	switch (musb->xceiv->state) {  in otg_timer()
159 		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);  in otg_timer()
161 		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);  in otg_timer()
163 			musb->xceiv->state = OTG_STATE_B_IDLE;  in otg_timer()
166 			musb->xceiv->state = OTG_STATE_A_IDLE;  in otg_timer()
171 		musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;  in otg_timer()
172 		musb_writel(musb->ctrl_base, CORE_INTR_SRC_SET_REG,  in otg_timer()
183 			musb->xceiv->state = OTG_STATE_A_IDLE;  in otg_timer()
188 	spin_unlock_irqrestore(&musb->lock, flags);  in otg_timer()
202 	if (musb->is_active || (musb->a_wait_bcon == 0 &&  in am35x_musb_try_idle()
203 				musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {  in am35x_musb_try_idle()
204 		dev_dbg(musb->controller, "%s active, deleting timer\n",  in am35x_musb_try_idle()
205 			otg_state_string(musb->xceiv->state));  in am35x_musb_try_idle()
212 		dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n");  in am35x_musb_try_idle()
217 	dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",  in am35x_musb_try_idle()
218 		otg_state_string(musb->xceiv->state),  in am35x_musb_try_idle()
219 		jiffies_to_msecs(timeout - jiffies));  in am35x_musb_try_idle()
227 	void __iomem *reg_base = musb->ctrl_base;  in am35x_musb_interrupt()
229 	struct device *dev = musb->controller;  in am35x_musb_interrupt()
230 	struct musb_hdrc_platform_data *plat = dev->platform_data;  in am35x_musb_interrupt()
231 	struct omap_musb_board_data *data = plat->board_data;  in am35x_musb_interrupt()
232 	struct usb_otg *otg = musb->xceiv->otg;  in am35x_musb_interrupt()  local
235 		(struct omap_musb_board_data *)musb->controller;  in am35x_musb_interrupt()
249 	spin_lock_irqsave(&musb->lock, flags);  in am35x_musb_interrupt()
257 		musb->int_rx =  in am35x_musb_interrupt()
259 		musb->int_tx =  in am35x_musb_interrupt()
271 		musb->int_usb =  in am35x_musb_interrupt()
278 	 * switch appropriately between halves of the OTG state machine.  in am35x_musb_interrupt()
285 		void __iomem *mregs = musb->mregs;  in am35x_musb_interrupt()
289 		err = is_host_enabled(musb) && (musb->int_usb &  in am35x_musb_interrupt()
295 			 * means it's not uncommon for bus-powered devices  in am35x_musb_interrupt()
299 			 * seems to allow a better one: "re"-starting sessions  in am35x_musb_interrupt()
303 			musb->int_usb &= ~MUSB_INTR_VBUSERROR;  in am35x_musb_interrupt()
304 			musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;  in am35x_musb_interrupt()
309 			otg->default_a = 1;  in am35x_musb_interrupt()
310 			musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;  in am35x_musb_interrupt()
311 			portstate(musb->port1_status |= USB_PORT_STAT_POWER);  in am35x_musb_interrupt()
314 			musb->is_active = 0;  in am35x_musb_interrupt()
316 			otg->default_a = 0;  in am35x_musb_interrupt()
317 			musb->xceiv->state = OTG_STATE_B_IDLE;  in am35x_musb_interrupt()
318 			portstate(musb->port1_status &= ~USB_PORT_STAT_POWER);  in am35x_musb_interrupt()
321 		/* NOTE: this must complete power-on within 100 ms. */  in am35x_musb_interrupt()
322 		dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",  in am35x_musb_interrupt()
324 				otg_state_string(musb->xceiv->state),  in am35x_musb_interrupt()
331 	if (musb->int_tx || musb->int_rx || musb->int_usb)  in am35x_musb_interrupt()
335 	/* EOI needs to be written for the IRQ to be re-asserted. */  in am35x_musb_interrupt()
338 		if (data->clear_irq)  in am35x_musb_interrupt()
339 			data->clear_irq(data->dev);  in am35x_musb_interrupt()
346 	if (is_otg_enabled(musb) && musb->xceiv->state == OTG_STATE_B_IDLE)  in am35x_musb_interrupt()
350 	spin_unlock_irqrestore(&musb->lock, flags);  in am35x_musb_interrupt()
358 	struct device *dev = musb->controller;  in am35x_musb_set_mode()
359 	struct musb_hdrc_platform_data *plat = dev->platform_data;  in am35x_musb_set_mode()
360 	struct omap_musb_board_data *data = plat->board_data;  in am35x_musb_set_mode()
363 	if (data->set_mode)  in am35x_musb_set_mode()
364 		data->set_mode(musb_mode);  in am35x_musb_set_mode()
366 		retval = -EIO;  in am35x_musb_set_mode()
375 	struct device *dev = musb->controller;  in am35x_musb_init()
376 	struct musb_hdrc_platform_data *plat = dev->platform_data;  in am35x_musb_init()
377 	struct omap_musb_board_data *data = plat->board_data;  in am35x_musb_init()
380 		(struct omap_musb_board_data *)musb->controller;  in am35x_musb_init()
382 	void __iomem *reg_base = musb->ctrl_base;  in am35x_musb_init()
383 	u32 rev;  in am35x_musb_init()  local
385 	musb->mregs += USB_MENTOR_CORE_OFFSET;  in am35x_musb_init()
388 	rev = musb_readl(reg_base, USB_REVISION_REG);  in am35x_musb_init()
389 	if (!rev)  in am35x_musb_init()
390 		return -ENODEV;  in am35x_musb_init()
394 	musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);  in am35x_musb_init()
395 	if (IS_ERR_OR_NULL(musb->xceiv))  in am35x_musb_init()
396 		return -ENODEV;  in am35x_musb_init()
403 	if (data->reset)  in am35x_musb_init()
404 		data->reset(data->dev);  in am35x_musb_init()
409 	/* Start the on-chip PHY and its PLL. */  in am35x_musb_init()
410 	if (data->set_phy_power)  in am35x_musb_init()
411 		data->set_phy_power(data->dev, 1);  in am35x_musb_init()
415 	musb->isr = am35x_musb_interrupt;  in am35x_musb_init()
418 	if (data->clear_irq)  in am35x_musb_init()
419 		data->clear_irq(data->dev);  in am35x_musb_init()
427 	struct device *dev = musb->controller;  in am35x_musb_exit()
428 	struct musb_hdrc_platform_data *plat = dev->platform_data;  in am35x_musb_exit()
429 	struct omap_musb_board_data *data = plat->board_data;  in am35x_musb_exit()
432 		(struct omap_musb_board_data *)musb->controller;  in am35x_musb_exit()
440 	/* Shutdown the on-chip PHY and its PLL. */  in am35x_musb_exit()
441 	if (data->set_phy_power)  in am35x_musb_exit()
442 		data->set_phy_power(data->dev, 0);  in am35x_musb_exit()
445 	usb_put_phy(musb->xceiv);  in am35x_musb_exit()
455 	void __iomem *fifo = hw_ep->fifo;  in musb_read_fifo()
459 	/* Read for 32bit-aligned destination address */  in musb_read_fifo()
506 	struct musb_hdrc_platform_data	*pdata = pdev->dev.platform_data;  in am35x_probe()
513 	int				ret = -ENOMEM;  in am35x_probe()
517 		dev_err(&pdev->dev, "failed to allocate glue context\n");  in am35x_probe()
521 	musb = platform_device_alloc("musb-hdrc", -1);  in am35x_probe()
523 		dev_err(&pdev->dev, "failed to allocate musb device\n");  in am35x_probe()
527 	phy_clk = clk_get(&pdev->dev, "fck");  in am35x_probe()
529 		dev_err(&pdev->dev, "failed to get PHY clock\n");  in am35x_probe()
534 	clk = clk_get(&pdev->dev, "ick");  in am35x_probe()
536 		dev_err(&pdev->dev, "failed to get clock\n");  in am35x_probe()
543 		dev_err(&pdev->dev, "failed to enable PHY clock\n");  in am35x_probe()
549 		dev_err(&pdev->dev, "failed to enable clock\n");  in am35x_probe()
553 	musb->dev.parent		= &pdev->dev;  in am35x_probe()
554 	musb->dev.dma_mask		= &am35x_dmamask;  in am35x_probe()
555 	musb->dev.coherent_dma_mask	= am35x_dmamask;  in am35x_probe()
557 	glue->dev			= &pdev->dev;  in am35x_probe()
558 	glue->musb			= musb;  in am35x_probe()
559 	glue->phy_clk			= phy_clk;  in am35x_probe()
560 	glue->clk			= clk;  in am35x_probe()
562 	pdata->platform_ops		= &am35x_ops;  in am35x_probe()
566 	ret = platform_device_add_resources(musb, pdev->resource,  in am35x_probe()
567 			pdev->num_resources);  in am35x_probe()
569 		dev_err(&pdev->dev, "failed to add resources\n");  in am35x_probe()
575 		dev_err(&pdev->dev, "failed to add platform_data\n");  in am35x_probe()
581 		dev_err(&pdev->dev, "failed to register musb device\n");  in am35x_probe()
613 	platform_device_del(glue->musb);  in am35x_remove()
614 	platform_device_put(glue->musb);  in am35x_remove()
615 	clk_disable(glue->clk);  in am35x_remove()
616 	clk_disable(glue->phy_clk);  in am35x_remove()
617 	clk_put(glue->clk);  in am35x_remove()
618 	clk_put(glue->phy_clk);  in am35x_remove()
628 	struct musb_hdrc_platform_data *plat = dev->platform_data;  in am35x_suspend()
629 	struct omap_musb_board_data *data = plat->board_data;  in am35x_suspend()
631 	/* Shutdown the on-chip PHY and its PLL. */  in am35x_suspend()
632 	if (data->set_phy_power)  in am35x_suspend()
633 		data->set_phy_power(data->dev, 0);  in am35x_suspend()
635 	clk_disable(glue->phy_clk);  in am35x_suspend()
636 	clk_disable(glue->clk);  in am35x_suspend()
644 	struct musb_hdrc_platform_data *plat = dev->platform_data;  in am35x_resume()
645 	struct omap_musb_board_data *data = plat->board_data;  in am35x_resume()
648 	/* Start the on-chip PHY and its PLL. */  in am35x_resume()
649 	if (data->set_phy_power)  in am35x_resume()
650 		data->set_phy_power(data->dev, 1);  in am35x_resume()
652 	ret = clk_enable(glue->phy_clk);  in am35x_resume()
658 	ret = clk_enable(glue->clk);  in am35x_resume()
681 		.name	= "musb-am35x",