1 // SPDX-License-Identifier: GPL-1.0+
6  * (C) Copyright 2000-2005 David Brownell
7  * (C) Copyright 2002 Hewlett-Packard Company
9  * OMAP Bus Glue
11  * Modified for OMAP by Tony Lindgren <tony@atomide.com>
12  * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
13  * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
19 #include <linux/dma-mapping.h>
35 #include <asm/mach-types.h>
43 #define DRIVER_DESC "OHCI OMAP driver"
52 static const char hcd_name[] = "ohci-omap";
56 	((struct ohci_omap_priv *)hcd_to_ohci(h)->priv)
61 		clk_enable(priv->usb_dc_ck);  in omap_ohci_clock_power()
62 		clk_enable(priv->usb_host_ck);  in omap_ohci_clock_power()
66 		clk_disable(priv->usb_host_ck);  in omap_ohci_clock_power()
67 		clk_disable(priv->usb_dc_ck);  in omap_ohci_clock_power()
72  * Board specific gang-switched transceiver power on/off.
80 				| ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),  in omap_ohci_transceiver_power()
82 		else if (priv->power)  in omap_ohci_transceiver_power()
83 			gpiod_set_value_cansleep(priv->power, 0);  in omap_ohci_transceiver_power()
87 				& ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),  in omap_ohci_transceiver_power()
89 		else if (priv->power)  in omap_ohci_transceiver_power()
90 			gpiod_set_value_cansleep(priv->power, 1);  in omap_ohci_transceiver_power()
101 	const unsigned	port = hcd->self.otg_port - 1;  in start_hnp()
105 	otg_start_hnp(hcd->usb_phy->otg);  in start_hnp()
108 	hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;  in start_hnp()
109 	writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);  in start_hnp()
118 /*-------------------------------------------------------------------------*/
123 	struct omap_usb_config	*config = dev_get_platdata(hcd->self.controller);  in ohci_omap_reset()
125 	int			need_transceiver = (config->otg != 0);  in ohci_omap_reset()
128 	dev_dbg(hcd->self.controller, "starting USB Controller\n");  in ohci_omap_reset()
130 	if (config->otg) {  in ohci_omap_reset()
131 		hcd->self.otg_port = config->otg;  in ohci_omap_reset()
133 		hcd->power_budget = 8;  in ohci_omap_reset()
136 	/* boards can use OTG transceivers in non-OTG modes */  in ohci_omap_reset()
141 	if (config->ocpi_enable)  in ohci_omap_reset()
142 		config->ocpi_enable();  in ohci_omap_reset()
146 		hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);  in ohci_omap_reset()
147 		if (!IS_ERR_OR_NULL(hcd->usb_phy)) {  in ohci_omap_reset()
148 			int	status = otg_set_host(hcd->usb_phy->otg,  in ohci_omap_reset()
149 						&ohci_to_hcd(ohci)->self);  in ohci_omap_reset()
150 			dev_dbg(hcd->self.controller, "init %s phy, status %d\n",  in ohci_omap_reset()
151 					hcd->usb_phy->label, status);  in ohci_omap_reset()
153 				usb_put_phy(hcd->usb_phy);  in ohci_omap_reset()
157 			return -EPROBE_DEFER;  in ohci_omap_reset()
159 		hcd->skip_phy_initialization = 1;  in ohci_omap_reset()
160 		ohci->start_hnp = start_hnp;  in ohci_omap_reset()
166 	if (config->lb_reset)  in ohci_omap_reset()
167 		config->lb_reset();  in ohci_omap_reset()
173 	if (config->otg || config->rwc) {  in ohci_omap_reset()
174 		ohci->hc_control = OHCI_CTRL_RWC;  in ohci_omap_reset()
175 		writel(OHCI_CTRL_RWC, &ohci->regs->control);  in ohci_omap_reset()
178 	/* board-specific power switching and overcurrent support */  in ohci_omap_reset()
187 			ohci_to_hcd(ohci)->power_budget = 250;  in ohci_omap_reset()
197 		ohci_writel(ohci, rh, &ohci->regs->roothub.a);  in ohci_omap_reset()
198 		ohci->flags &= ~OHCI_QUIRK_HUB_POWER;  in ohci_omap_reset()
200 		/* We require a self-powered hub, which should have  in ohci_omap_reset()
202 		ohci_to_hcd(ohci)->power_budget = 0;  in ohci_omap_reset()
216 /*-------------------------------------------------------------------------*/
219  * ohci_hcd_omap_probe - initialize OMAP-based HCDs
234 	if (pdev->num_resources != 2) {  in ohci_hcd_omap_probe()
235 		dev_err(&pdev->dev, "invalid num_resources: %i\n",  in ohci_hcd_omap_probe()
236 		       pdev->num_resources);  in ohci_hcd_omap_probe()
237 		return -ENODEV;  in ohci_hcd_omap_probe()
240 	if (pdev->resource[0].flags != IORESOURCE_MEM  in ohci_hcd_omap_probe()
241 			|| pdev->resource[1].flags != IORESOURCE_IRQ) {  in ohci_hcd_omap_probe()
242 		dev_err(&pdev->dev, "invalid resource type\n");  in ohci_hcd_omap_probe()
243 		return -ENODEV;  in ohci_hcd_omap_probe()
246 	hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,  in ohci_hcd_omap_probe()
247 			dev_name(&pdev->dev));  in ohci_hcd_omap_probe()
249 		return -ENOMEM;  in ohci_hcd_omap_probe()
251 	hcd->rsrc_start = pdev->resource[0].start;  in ohci_hcd_omap_probe()
252 	hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;  in ohci_hcd_omap_probe()
256 	priv->power = devm_gpiod_get_optional(&pdev->dev, "power", GPIOD_ASIS);  in ohci_hcd_omap_probe()
257 	if (IS_ERR(priv->power)) {  in ohci_hcd_omap_probe()
258 		retval = PTR_ERR(priv->power);  in ohci_hcd_omap_probe()
261 	if (priv->power)  in ohci_hcd_omap_probe()
262 		gpiod_set_consumer_name(priv->power, "OHCI power");  in ohci_hcd_omap_probe()
269 	priv->overcurrent = devm_gpiod_get_optional(&pdev->dev, "overcurrent",  in ohci_hcd_omap_probe()
271 	if (IS_ERR(priv->overcurrent)) {  in ohci_hcd_omap_probe()
272 		retval = PTR_ERR(priv->overcurrent);  in ohci_hcd_omap_probe()
275 	if (priv->overcurrent)  in ohci_hcd_omap_probe()
276 		gpiod_set_consumer_name(priv->overcurrent, "OHCI overcurrent");  in ohci_hcd_omap_probe()
278 	priv->usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");  in ohci_hcd_omap_probe()
279 	if (IS_ERR(priv->usb_host_ck)) {  in ohci_hcd_omap_probe()
280 		retval = PTR_ERR(priv->usb_host_ck);  in ohci_hcd_omap_probe()
285 		priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");  in ohci_hcd_omap_probe()
287 		priv->usb_dc_ck = clk_get(&pdev->dev, "lb_ck");  in ohci_hcd_omap_probe()
289 	if (IS_ERR(priv->usb_dc_ck)) {  in ohci_hcd_omap_probe()
290 		retval = PTR_ERR(priv->usb_dc_ck);  in ohci_hcd_omap_probe()
294 	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {  in ohci_hcd_omap_probe()
295 		dev_dbg(&pdev->dev, "request_mem_region failed\n");  in ohci_hcd_omap_probe()
296 		retval = -EBUSY;  in ohci_hcd_omap_probe()
300 	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);  in ohci_hcd_omap_probe()
301 	if (!hcd->regs) {  in ohci_hcd_omap_probe()
302 		dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");  in ohci_hcd_omap_probe()
303 		retval = -ENOMEM;  in ohci_hcd_omap_probe()
309 		retval = -ENXIO;  in ohci_hcd_omap_probe()
316 	device_wakeup_enable(hcd->self.controller);  in ohci_hcd_omap_probe()
319 	iounmap(hcd->regs);  in ohci_hcd_omap_probe()
321 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);  in ohci_hcd_omap_probe()
323 	clk_put(priv->usb_dc_ck);  in ohci_hcd_omap_probe()
325 	clk_put(priv->usb_host_ck);  in ohci_hcd_omap_probe()
335  * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
349 	dev_dbg(hcd->self.controller, "stopping USB Controller\n");  in ohci_hcd_omap_remove()
352 	if (!IS_ERR_OR_NULL(hcd->usb_phy)) {  in ohci_hcd_omap_remove()
353 		(void) otg_set_host(hcd->usb_phy->otg, 0);  in ohci_hcd_omap_remove()
354 		usb_put_phy(hcd->usb_phy);  in ohci_hcd_omap_remove()
356 	iounmap(hcd->regs);  in ohci_hcd_omap_remove()
357 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);  in ohci_hcd_omap_remove()
358 	clk_put(priv->usb_dc_ck);  in ohci_hcd_omap_remove()
359 	clk_put(priv->usb_host_ck);  in ohci_hcd_omap_remove()
364 /*-------------------------------------------------------------------------*/
373 	bool do_wakeup = device_may_wakeup(&pdev->dev);  in ohci_omap_suspend()
376 	if (time_before(jiffies, ohci->next_statechange))  in ohci_omap_suspend()
378 	ohci->next_statechange = jiffies;  in ohci_omap_suspend()
394 	if (time_before(jiffies, ohci->next_statechange))  in ohci_omap_resume()
396 	ohci->next_statechange = jiffies;  in ohci_omap_resume()
405 /*-------------------------------------------------------------------------*/
408  * Driver definition to register with the OMAP bus
424 	.product_desc	= "OMAP OHCI",
432 		return -ENODEV;  in ohci_omap_init()