3  * PolarFire SoC (MPFS) MUSB Glue Layer
27 	struct platform_device *musb;  member
52 static void mpfs_musb_set_vbus(struct musb *musb, int is_on)  in mpfs_musb_set_vbus()  argument
61 	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);  in mpfs_musb_set_vbus()
64 		musb->is_active = 1;  in mpfs_musb_set_vbus()
65 		musb->xceiv->otg->default_a = 1;  in mpfs_musb_set_vbus()
66 		musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;  in mpfs_musb_set_vbus()
68 		MUSB_HST_MODE(musb);  in mpfs_musb_set_vbus()
70 		musb->is_active = 0;  in mpfs_musb_set_vbus()
76 		musb->xceiv->otg->default_a = 0;  in mpfs_musb_set_vbus()
77 		musb->xceiv->otg->state = OTG_STATE_B_IDLE;  in mpfs_musb_set_vbus()
80 		MUSB_DEV_MODE(musb);  in mpfs_musb_set_vbus()
83 	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);  in mpfs_musb_set_vbus()
85 	dev_dbg(musb->controller, "VBUS %s, devctl %02x\n",  in mpfs_musb_set_vbus()
86 		usb_otg_state_string(musb->xceiv->otg->state),  in mpfs_musb_set_vbus()
87 		musb_readb(musb->mregs, MUSB_DEVCTL));  in mpfs_musb_set_vbus()
94 	struct musb		*musb = timer_container_of(musb, t,  in otg_timer()  local
96 	void __iomem		*mregs = musb->mregs;  in otg_timer()
105 	dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,  in otg_timer()
106 		usb_otg_state_string(musb->xceiv->otg->state));  in otg_timer()
108 	spin_lock_irqsave(&musb->lock, flags);  in otg_timer()
109 	switch (musb->xceiv->otg->state) {  in otg_timer()
112 		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);  in otg_timer()
114 		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);  in otg_timer()
116 			musb->xceiv->otg->state = OTG_STATE_B_IDLE;  in otg_timer()
117 			MUSB_DEV_MODE(musb);  in otg_timer()
118 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in otg_timer()
120 			musb->xceiv->otg->state = OTG_STATE_A_IDLE;  in otg_timer()
121 			MUSB_HST_MODE(musb);  in otg_timer()
126 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in otg_timer()
129 		musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;  in otg_timer()
147 			mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in otg_timer()
149 			musb->xceiv->otg->state = OTG_STATE_A_IDLE;  in otg_timer()
154 	spin_unlock_irqrestore(&musb->lock, flags);  in otg_timer()
157 static void __maybe_unused mpfs_musb_try_idle(struct musb *musb, unsigned long timeout)  in mpfs_musb_try_idle()  argument
165 	if (musb->is_active || (musb->a_wait_bcon == 0 &&  in mpfs_musb_try_idle()
166 				musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON)) {  in mpfs_musb_try_idle()
167 		dev_dbg(musb->controller, "%s active, deleting timer\n",  in mpfs_musb_try_idle()
168 			usb_otg_state_string(musb->xceiv->otg->state));  in mpfs_musb_try_idle()
169 		timer_delete(&musb->dev_timer);  in mpfs_musb_try_idle()
174 	if (time_after(last_timer, timeout) && timer_pending(&musb->dev_timer)) {  in mpfs_musb_try_idle()
175 		dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n");  in mpfs_musb_try_idle()
180 	dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",  in mpfs_musb_try_idle()
181 		usb_otg_state_string(musb->xceiv->otg->state),  in mpfs_musb_try_idle()
183 	mod_timer(&musb->dev_timer, timeout);  in mpfs_musb_try_idle()
190 	struct musb *musb = __hci;  in mpfs_musb_interrupt()  local
192 	spin_lock_irqsave(&musb->lock, flags);  in mpfs_musb_interrupt()
194 	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);  in mpfs_musb_interrupt()
195 	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);  in mpfs_musb_interrupt()
196 	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);  in mpfs_musb_interrupt()
198 	if (musb->int_usb || musb->int_tx || musb->int_rx) {  in mpfs_musb_interrupt()
199 		musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);  in mpfs_musb_interrupt()
200 		musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);  in mpfs_musb_interrupt()
201 		musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);  in mpfs_musb_interrupt()
202 		ret = musb_interrupt(musb);  in mpfs_musb_interrupt()
206 	if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)  in mpfs_musb_interrupt()
207 		mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);  in mpfs_musb_interrupt()
209 	spin_unlock_irqrestore(&musb->lock, flags);  in mpfs_musb_interrupt()
214 static int mpfs_musb_init(struct musb *musb)  in mpfs_musb_init()  argument
216 	struct device *dev = musb->controller;  in mpfs_musb_init()
218 	musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);  in mpfs_musb_init()
219 	if (IS_ERR(musb->xceiv)) {  in mpfs_musb_init()
221 		return PTR_ERR(musb->xceiv);  in mpfs_musb_init()
224 	timer_setup(&musb->dev_timer, otg_timer, 0);  in mpfs_musb_init()
226 	musb->dyn_fifo = true;  in mpfs_musb_init()
227 	musb->isr = mpfs_musb_interrupt;  in mpfs_musb_init()
229 	musb_platform_set_vbus(musb, 1);  in mpfs_musb_init()
234 static int mpfs_musb_exit(struct musb *musb)  in mpfs_musb_exit()  argument
236 	timer_delete_sync(&musb->dev_timer);  in mpfs_musb_exit()
269 	musb_pdev = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);  in mpfs_probe()
271 		dev_err(dev, "failed to allocate musb device\n");  in mpfs_probe()
294 	glue->musb = musb_pdev;  in mpfs_probe()
338 		dev_err(dev, "failed to register musb device\n");  in mpfs_probe()
342 	dev_info(&pdev->dev, "Registered MPFS MUSB driver\n");  in mpfs_probe()
359 	platform_device_unregister(glue->musb);  in mpfs_remove()
365 	{ .compatible = "microchip,mpfs-musb" },
375 		.name = "mpfs-musb",
382 MODULE_DESCRIPTION("PolarFire SoC MUSB Glue Layer");