1 // SPDX-License-Identifier: GPL-2.0
3  * Generic platform ohci driver
6  * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
9  * Derived from the OCHI-SSB driver
10  * Derived from the OHCI-PCI driver
12  * Copyright 2000-2002 David Brownell
18 #include <linux/dma-mapping.h>
33 #include "ohci.h"
35 #define DRIVER_DESC "OHCI generic platform driver"
37 #define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
50 	for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {  in ohci_platform_power_on()
51 		ret = clk_prepare_enable(priv->clks[clk]);  in ohci_platform_power_on()
59 	while (--clk >= 0)  in ohci_platform_power_on()
60 		clk_disable_unprepare(priv->clks[clk]);  in ohci_platform_power_on()
71 	for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)  in ohci_platform_power_off()
72 		if (priv->clks[clk])  in ohci_platform_power_off()
73 			clk_disable_unprepare(priv->clks[clk]);  in ohci_platform_power_off()
79 	.product_desc =		"Generic Platform OHCI controller",
93 	struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);  in ohci_platform_probe()
95 	struct ohci_hcd *ohci;  in ohci_platform_probe()  local
99 		return -ENODEV;  in ohci_platform_probe()
108 	err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));  in ohci_platform_probe()
116 	hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,  in ohci_platform_probe()
117 			dev_name(&dev->dev));  in ohci_platform_probe()
119 		return -ENOMEM;  in ohci_platform_probe()
122 	dev->dev.platform_data = pdata;  in ohci_platform_probe()
124 	ohci = hcd_to_ohci(hcd);  in ohci_platform_probe()
126 	if (pdata == &ohci_platform_defaults && dev->dev.of_node) {  in ohci_platform_probe()
127 		if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))  in ohci_platform_probe()
128 			ohci->flags |= OHCI_QUIRK_BE_MMIO;  in ohci_platform_probe()
130 		if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))  in ohci_platform_probe()
131 			ohci->flags |= OHCI_QUIRK_BE_DESC;  in ohci_platform_probe()
133 		if (of_property_read_bool(dev->dev.of_node, "big-endian"))  in ohci_platform_probe()
134 			ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;  in ohci_platform_probe()
136 		if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no"))  in ohci_platform_probe()
137 			ohci->flags |= OHCI_QUIRK_FRAME_NO;  in ohci_platform_probe()
139 		if (of_property_read_bool(dev->dev.of_node,  in ohci_platform_probe()
140 					  "remote-wakeup-connected"))  in ohci_platform_probe()
141 			ohci->hc_control = OHCI_CTRL_RWC;  in ohci_platform_probe()
143 		of_property_read_u32(dev->dev.of_node, "num-ports",  in ohci_platform_probe()
144 				     &ohci->num_ports);  in ohci_platform_probe()
147 			priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);  in ohci_platform_probe()
148 			if (IS_ERR(priv->clks[clk])) {  in ohci_platform_probe()
149 				err = PTR_ERR(priv->clks[clk]);  in ohci_platform_probe()
150 				if (err == -EPROBE_DEFER)  in ohci_platform_probe()
152 				priv->clks[clk] = NULL;  in ohci_platform_probe()
157 		priv->resets = devm_reset_control_array_get_optional_shared(  in ohci_platform_probe()
158 								&dev->dev);  in ohci_platform_probe()
159 		if (IS_ERR(priv->resets)) {  in ohci_platform_probe()
160 			err = PTR_ERR(priv->resets);  in ohci_platform_probe()
164 		err = reset_control_deassert(priv->resets);  in ohci_platform_probe()
169 	if (pdata->big_endian_desc)  in ohci_platform_probe()
170 		ohci->flags |= OHCI_QUIRK_BE_DESC;  in ohci_platform_probe()
171 	if (pdata->big_endian_mmio)  in ohci_platform_probe()
172 		ohci->flags |= OHCI_QUIRK_BE_MMIO;  in ohci_platform_probe()
173 	if (pdata->no_big_frame_no)  in ohci_platform_probe()
174 		ohci->flags |= OHCI_QUIRK_FRAME_NO;  in ohci_platform_probe()
175 	if (pdata->num_ports)  in ohci_platform_probe()
176 		ohci->num_ports = pdata->num_ports;  in ohci_platform_probe()
179 	if (ohci->flags & OHCI_QUIRK_BE_MMIO) {  in ohci_platform_probe()
180 		dev_err(&dev->dev,  in ohci_platform_probe()
182 		err = -EINVAL;  in ohci_platform_probe()
187 	if (ohci->flags & OHCI_QUIRK_BE_DESC) {  in ohci_platform_probe()
188 		dev_err(&dev->dev,  in ohci_platform_probe()
190 		err = -EINVAL;  in ohci_platform_probe()
195 	pm_runtime_set_active(&dev->dev);  in ohci_platform_probe()
196 	pm_runtime_enable(&dev->dev);  in ohci_platform_probe()
197 	if (pdata->power_on) {  in ohci_platform_probe()
198 		err = pdata->power_on(dev);  in ohci_platform_probe()
203 	hcd->regs = devm_platform_get_and_ioremap_resource(dev, 0, &res_mem);  in ohci_platform_probe()
204 	if (IS_ERR(hcd->regs)) {  in ohci_platform_probe()
205 		err = PTR_ERR(hcd->regs);  in ohci_platform_probe()
208 	hcd->rsrc_start = res_mem->start;  in ohci_platform_probe()
209 	hcd->rsrc_len = resource_size(res_mem);  in ohci_platform_probe()
211 	hcd->tpl_support = of_usb_host_tpl_support(dev->dev.of_node);  in ohci_platform_probe()
217 	device_wakeup_enable(hcd->self.controller);  in ohci_platform_probe()
224 	if (pdata->power_off)  in ohci_platform_probe()
225 		pdata->power_off(dev);  in ohci_platform_probe()
227 	pm_runtime_disable(&dev->dev);  in ohci_platform_probe()
228 	reset_control_assert(priv->resets);  in ohci_platform_probe()
230 	while (--clk >= 0)  in ohci_platform_probe()
231 		clk_put(priv->clks[clk]);  in ohci_platform_probe()
234 		dev->dev.platform_data = NULL;  in ohci_platform_probe()
244 	struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);  in ohci_platform_remove()
248 	pm_runtime_get_sync(&dev->dev);  in ohci_platform_remove()
251 	if (pdata->power_off)  in ohci_platform_remove()
252 		pdata->power_off(dev);  in ohci_platform_remove()
254 	reset_control_assert(priv->resets);  in ohci_platform_remove()
256 	for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)  in ohci_platform_remove()
257 		clk_put(priv->clks[clk]);  in ohci_platform_remove()
261 	pm_runtime_put_sync(&dev->dev);  in ohci_platform_remove()
262 	pm_runtime_disable(&dev->dev);  in ohci_platform_remove()
265 		dev->dev.platform_data = NULL;  in ohci_platform_remove()
272 	struct usb_ohci_pdata *pdata = dev->platform_data;  in ohci_platform_suspend()
281 	if (pdata->power_suspend)  in ohci_platform_suspend()
282 		pdata->power_suspend(pdev);  in ohci_platform_suspend()
293 	if (pdata->power_on) {  in ohci_platform_resume_common()
294 		int err = pdata->power_on(pdev);  in ohci_platform_resume_common()
320 	{ .compatible = "generic-ohci", },
321 	{ .compatible = "cavium,octeon-6335-ohci", },
322 	{ .compatible = "ti,ohci-omap3", },
328 	{ "ohci-platform", 0 },
350 		.name	= "ohci-platform",
362 		return -ENODEV;  in ohci_platform_init()