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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Generic platform ohci driver
4 *
5 * Copyright 2007 Michael Buesch <m@bues.ch>
6 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
7 * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
8 *
9 * Derived from the OCHI-SSB driver
10 * Derived from the OHCI-PCI driver
11 * Copyright 1999 Roman Weissgaerber
12 * Copyright 2000-2002 David Brownell
13 * Copyright 1999 Linus Torvalds
14 * Copyright 1999 Gregory P. Smith
15 */
16
17#include <linux/clk.h>
18#include <linux/dma-mapping.h>
19#include <linux/hrtimer.h>
20#include <linux/io.h>
21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/err.h>
24#include <linux/of.h>
25#include <linux/platform_device.h>
26#include <linux/pm_runtime.h>
27#include <linux/reset.h>
28#include <linux/usb/ohci_pdriver.h>
29#include <linux/usb.h>
30#include <linux/usb/hcd.h>
31#include <linux/usb/of.h>
32
33#include "ohci.h"
34
35#define DRIVER_DESC "OHCI generic platform driver"
36#define OHCI_MAX_CLKS 3
37#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
38
39struct ohci_platform_priv {
40 struct clk *clks[OHCI_MAX_CLKS];
41 struct reset_control *resets;
42};
43
44static int ohci_platform_power_on(struct platform_device *dev)
45{
46 struct usb_hcd *hcd = platform_get_drvdata(dev);
47 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
48 int clk, ret;
49
50 for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
51 ret = clk_prepare_enable(priv->clks[clk]);
52 if (ret)
53 goto err_disable_clks;
54 }
55
56 return 0;
57
58err_disable_clks:
59 while (--clk >= 0)
60 clk_disable_unprepare(priv->clks[clk]);
61
62 return ret;
63}
64
65static void ohci_platform_power_off(struct platform_device *dev)
66{
67 struct usb_hcd *hcd = platform_get_drvdata(dev);
68 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
69 int clk;
70
71 for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
72 if (priv->clks[clk])
73 clk_disable_unprepare(priv->clks[clk]);
74}
75
76static struct hc_driver __read_mostly ohci_platform_hc_driver;
77
78static const struct ohci_driver_overrides platform_overrides __initconst = {
79 .product_desc = "Generic Platform OHCI controller",
80 .extra_priv_size = sizeof(struct ohci_platform_priv),
81};
82
83static struct usb_ohci_pdata ohci_platform_defaults = {
84 .power_on = ohci_platform_power_on,
85 .power_suspend = ohci_platform_power_off,
86 .power_off = ohci_platform_power_off,
87};
88
89static int ohci_platform_probe(struct platform_device *dev)
90{
91 struct usb_hcd *hcd;
92 struct resource *res_mem;
93 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
94 struct ohci_platform_priv *priv;
95 struct ohci_hcd *ohci;
96 int err, irq, clk = 0;
97
98 if (usb_disabled())
99 return -ENODEV;
100
101 /*
102 * Use reasonable defaults so platforms don't have to provide these
103 * with DT probing on ARM.
104 */
105 if (!pdata)
106 pdata = &ohci_platform_defaults;
107
108 err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
109 if (err)
110 return err;
111
112 irq = platform_get_irq(dev, 0);
113 if (irq < 0)
114 return irq;
115
116 hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
117 dev_name(&dev->dev));
118 if (!hcd)
119 return -ENOMEM;
120
121 platform_set_drvdata(dev, hcd);
122 dev->dev.platform_data = pdata;
123 priv = hcd_to_ohci_priv(hcd);
124 ohci = hcd_to_ohci(hcd);
125
126 if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
127 if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
128 ohci->flags |= OHCI_QUIRK_BE_MMIO;
129
130 if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
131 ohci->flags |= OHCI_QUIRK_BE_DESC;
132
133 if (of_property_read_bool(dev->dev.of_node, "big-endian"))
134 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
135
136 if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no"))
137 ohci->flags |= OHCI_QUIRK_FRAME_NO;
138
139 if (of_property_read_bool(dev->dev.of_node,
140 "remote-wakeup-connected"))
141 ohci->hc_control = OHCI_CTRL_RWC;
142
143 of_property_read_u32(dev->dev.of_node, "num-ports",
144 &ohci->num_ports);
145
146 for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
147 priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
148 if (IS_ERR(priv->clks[clk])) {
149 err = PTR_ERR(priv->clks[clk]);
150 if (err == -EPROBE_DEFER)
151 goto err_put_clks;
152 priv->clks[clk] = NULL;
153 break;
154 }
155 }
156
157 priv->resets = devm_reset_control_array_get_optional_shared(
158 &dev->dev);
159 if (IS_ERR(priv->resets)) {
160 err = PTR_ERR(priv->resets);
161 goto err_put_clks;
162 }
163
164 err = reset_control_deassert(priv->resets);
165 if (err)
166 goto err_put_clks;
167 }
168
169 if (pdata->big_endian_desc)
170 ohci->flags |= OHCI_QUIRK_BE_DESC;
171 if (pdata->big_endian_mmio)
172 ohci->flags |= OHCI_QUIRK_BE_MMIO;
173 if (pdata->no_big_frame_no)
174 ohci->flags |= OHCI_QUIRK_FRAME_NO;
175 if (pdata->num_ports)
176 ohci->num_ports = pdata->num_ports;
177
178#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
179 if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
180 dev_err(&dev->dev,
181 "Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
182 err = -EINVAL;
183 goto err_reset;
184 }
185#endif
186#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
187 if (ohci->flags & OHCI_QUIRK_BE_DESC) {
188 dev_err(&dev->dev,
189 "Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
190 err = -EINVAL;
191 goto err_reset;
192 }
193#endif
194
195 pm_runtime_set_active(&dev->dev);
196 pm_runtime_enable(&dev->dev);
197 if (pdata->power_on) {
198 err = pdata->power_on(dev);
199 if (err < 0)
200 goto err_reset;
201 }
202
203 res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
204 hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
205 if (IS_ERR(hcd->regs)) {
206 err = PTR_ERR(hcd->regs);
207 goto err_power;
208 }
209 hcd->rsrc_start = res_mem->start;
210 hcd->rsrc_len = resource_size(res_mem);
211
212 hcd->tpl_support = of_usb_host_tpl_support(dev->dev.of_node);
213
214 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
215 if (err)
216 goto err_power;
217
218 device_wakeup_enable(hcd->self.controller);
219
220 platform_set_drvdata(dev, hcd);
221
222 return err;
223
224err_power:
225 if (pdata->power_off)
226 pdata->power_off(dev);
227err_reset:
228 pm_runtime_disable(&dev->dev);
229 reset_control_assert(priv->resets);
230err_put_clks:
231 while (--clk >= 0)
232 clk_put(priv->clks[clk]);
233
234 if (pdata == &ohci_platform_defaults)
235 dev->dev.platform_data = NULL;
236
237 usb_put_hcd(hcd);
238
239 return err;
240}
241
242static int ohci_platform_remove(struct platform_device *dev)
243{
244 struct usb_hcd *hcd = platform_get_drvdata(dev);
245 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
246 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
247 int clk;
248
249 pm_runtime_get_sync(&dev->dev);
250 usb_remove_hcd(hcd);
251
252 if (pdata->power_off)
253 pdata->power_off(dev);
254
255 reset_control_assert(priv->resets);
256
257 for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
258 clk_put(priv->clks[clk]);
259
260 usb_put_hcd(hcd);
261
262 pm_runtime_put_sync(&dev->dev);
263 pm_runtime_disable(&dev->dev);
264
265 if (pdata == &ohci_platform_defaults)
266 dev->dev.platform_data = NULL;
267
268 return 0;
269}
270
271#ifdef CONFIG_PM_SLEEP
272static int ohci_platform_suspend(struct device *dev)
273{
274 struct usb_hcd *hcd = dev_get_drvdata(dev);
275 struct usb_ohci_pdata *pdata = dev->platform_data;
276 struct platform_device *pdev = to_platform_device(dev);
277 bool do_wakeup = device_may_wakeup(dev);
278 int ret;
279
280 ret = ohci_suspend(hcd, do_wakeup);
281 if (ret)
282 return ret;
283
284 if (pdata->power_suspend)
285 pdata->power_suspend(pdev);
286
287 return ret;
288}
289
290static int ohci_platform_resume_common(struct device *dev, bool hibernated)
291{
292 struct usb_hcd *hcd = dev_get_drvdata(dev);
293 struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
294 struct platform_device *pdev = to_platform_device(dev);
295
296 if (pdata->power_on) {
297 int err = pdata->power_on(pdev);
298 if (err < 0)
299 return err;
300 }
301
302 ohci_resume(hcd, hibernated);
303
304 pm_runtime_disable(dev);
305 pm_runtime_set_active(dev);
306 pm_runtime_enable(dev);
307
308 return 0;
309}
310
311static int ohci_platform_resume(struct device *dev)
312{
313 return ohci_platform_resume_common(dev, false);
314}
315
316static int ohci_platform_restore(struct device *dev)
317{
318 return ohci_platform_resume_common(dev, true);
319}
320#endif /* CONFIG_PM_SLEEP */
321
322static const struct of_device_id ohci_platform_ids[] = {
323 { .compatible = "generic-ohci", },
324 { .compatible = "cavium,octeon-6335-ohci", },
325 { .compatible = "ti,ohci-omap3", },
326 { }
327};
328MODULE_DEVICE_TABLE(of, ohci_platform_ids);
329
330static const struct platform_device_id ohci_platform_table[] = {
331 { "ohci-platform", 0 },
332 { }
333};
334MODULE_DEVICE_TABLE(platform, ohci_platform_table);
335
336#ifdef CONFIG_PM_SLEEP
337static const struct dev_pm_ops ohci_platform_pm_ops = {
338 .suspend = ohci_platform_suspend,
339 .resume = ohci_platform_resume,
340 .freeze = ohci_platform_suspend,
341 .thaw = ohci_platform_resume,
342 .poweroff = ohci_platform_suspend,
343 .restore = ohci_platform_restore,
344};
345#endif
346
347static struct platform_driver ohci_platform_driver = {
348 .id_table = ohci_platform_table,
349 .probe = ohci_platform_probe,
350 .remove = ohci_platform_remove,
351 .shutdown = usb_hcd_platform_shutdown,
352 .driver = {
353 .name = "ohci-platform",
354#ifdef CONFIG_PM_SLEEP
355 .pm = &ohci_platform_pm_ops,
356#endif
357 .of_match_table = ohci_platform_ids,
358 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
359 }
360};
361
362static int __init ohci_platform_init(void)
363{
364 if (usb_disabled())
365 return -ENODEV;
366
367 ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
368 return platform_driver_register(&ohci_platform_driver);
369}
370module_init(ohci_platform_init);
371
372static void __exit ohci_platform_cleanup(void)
373{
374 platform_driver_unregister(&ohci_platform_driver);
375}
376module_exit(ohci_platform_cleanup);
377
378MODULE_DESCRIPTION(DRIVER_DESC);
379MODULE_AUTHOR("Hauke Mehrtens");
380MODULE_AUTHOR("Alan Stern");
381MODULE_LICENSE("GPL");
1/*
2 * Generic platform ohci driver
3 *
4 * Copyright 2007 Michael Buesch <m@bues.ch>
5 * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
6 * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
7 *
8 * Derived from the OCHI-SSB driver
9 * Derived from the OHCI-PCI driver
10 * Copyright 1999 Roman Weissgaerber
11 * Copyright 2000-2002 David Brownell
12 * Copyright 1999 Linus Torvalds
13 * Copyright 1999 Gregory P. Smith
14 *
15 * Licensed under the GNU/GPL. See COPYING for details.
16 */
17
18#include <linux/clk.h>
19#include <linux/dma-mapping.h>
20#include <linux/hrtimer.h>
21#include <linux/io.h>
22#include <linux/kernel.h>
23#include <linux/module.h>
24#include <linux/err.h>
25#include <linux/phy/phy.h>
26#include <linux/platform_device.h>
27#include <linux/reset.h>
28#include <linux/usb/ohci_pdriver.h>
29#include <linux/usb.h>
30#include <linux/usb/hcd.h>
31
32#include "ohci.h"
33
34#define DRIVER_DESC "OHCI generic platform driver"
35#define OHCI_MAX_CLKS 3
36#define OHCI_MAX_RESETS 2
37#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
38
39struct ohci_platform_priv {
40 struct clk *clks[OHCI_MAX_CLKS];
41 struct reset_control *resets[OHCI_MAX_RESETS];
42 struct phy **phys;
43 int num_phys;
44};
45
46static const char hcd_name[] = "ohci-platform";
47
48static int ohci_platform_power_on(struct platform_device *dev)
49{
50 struct usb_hcd *hcd = platform_get_drvdata(dev);
51 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
52 int clk, ret, phy_num;
53
54 for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
55 ret = clk_prepare_enable(priv->clks[clk]);
56 if (ret)
57 goto err_disable_clks;
58 }
59
60 for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
61 ret = phy_init(priv->phys[phy_num]);
62 if (ret)
63 goto err_exit_phy;
64 ret = phy_power_on(priv->phys[phy_num]);
65 if (ret) {
66 phy_exit(priv->phys[phy_num]);
67 goto err_exit_phy;
68 }
69 }
70
71 return 0;
72
73err_exit_phy:
74 while (--phy_num >= 0) {
75 phy_power_off(priv->phys[phy_num]);
76 phy_exit(priv->phys[phy_num]);
77 }
78err_disable_clks:
79 while (--clk >= 0)
80 clk_disable_unprepare(priv->clks[clk]);
81
82 return ret;
83}
84
85static void ohci_platform_power_off(struct platform_device *dev)
86{
87 struct usb_hcd *hcd = platform_get_drvdata(dev);
88 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
89 int clk, phy_num;
90
91 for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
92 phy_power_off(priv->phys[phy_num]);
93 phy_exit(priv->phys[phy_num]);
94 }
95
96 for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
97 if (priv->clks[clk])
98 clk_disable_unprepare(priv->clks[clk]);
99}
100
101static struct hc_driver __read_mostly ohci_platform_hc_driver;
102
103static const struct ohci_driver_overrides platform_overrides __initconst = {
104 .product_desc = "Generic Platform OHCI controller",
105 .extra_priv_size = sizeof(struct ohci_platform_priv),
106};
107
108static struct usb_ohci_pdata ohci_platform_defaults = {
109 .power_on = ohci_platform_power_on,
110 .power_suspend = ohci_platform_power_off,
111 .power_off = ohci_platform_power_off,
112};
113
114static int ohci_platform_probe(struct platform_device *dev)
115{
116 struct usb_hcd *hcd;
117 struct resource *res_mem;
118 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
119 struct ohci_platform_priv *priv;
120 struct ohci_hcd *ohci;
121 int err, irq, phy_num, clk = 0, rst = 0;
122
123 if (usb_disabled())
124 return -ENODEV;
125
126 /*
127 * Use reasonable defaults so platforms don't have to provide these
128 * with DT probing on ARM.
129 */
130 if (!pdata)
131 pdata = &ohci_platform_defaults;
132
133 err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
134 if (err)
135 return err;
136
137 irq = platform_get_irq(dev, 0);
138 if (irq < 0) {
139 dev_err(&dev->dev, "no irq provided");
140 return irq;
141 }
142
143 hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
144 dev_name(&dev->dev));
145 if (!hcd)
146 return -ENOMEM;
147
148 platform_set_drvdata(dev, hcd);
149 dev->dev.platform_data = pdata;
150 priv = hcd_to_ohci_priv(hcd);
151 ohci = hcd_to_ohci(hcd);
152
153 if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
154 if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
155 ohci->flags |= OHCI_QUIRK_BE_MMIO;
156
157 if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
158 ohci->flags |= OHCI_QUIRK_BE_DESC;
159
160 if (of_property_read_bool(dev->dev.of_node, "big-endian"))
161 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
162
163 if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no"))
164 ohci->flags |= OHCI_QUIRK_FRAME_NO;
165
166 of_property_read_u32(dev->dev.of_node, "num-ports",
167 &ohci->num_ports);
168
169 priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
170 "phys", "#phy-cells");
171
172 if (priv->num_phys > 0) {
173 priv->phys = devm_kcalloc(&dev->dev, priv->num_phys,
174 sizeof(struct phy *), GFP_KERNEL);
175 if (!priv->phys)
176 return -ENOMEM;
177 } else
178 priv->num_phys = 0;
179
180 for (phy_num = 0; phy_num < priv->num_phys; phy_num++) {
181 priv->phys[phy_num] = devm_of_phy_get_by_index(
182 &dev->dev, dev->dev.of_node, phy_num);
183 if (IS_ERR(priv->phys[phy_num])) {
184 err = PTR_ERR(priv->phys[phy_num]);
185 goto err_put_hcd;
186 }
187 }
188
189 for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
190 priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
191 if (IS_ERR(priv->clks[clk])) {
192 err = PTR_ERR(priv->clks[clk]);
193 if (err == -EPROBE_DEFER)
194 goto err_put_clks;
195 priv->clks[clk] = NULL;
196 break;
197 }
198 }
199 for (rst = 0; rst < OHCI_MAX_RESETS; rst++) {
200 priv->resets[rst] =
201 devm_reset_control_get_shared_by_index(
202 &dev->dev, rst);
203 if (IS_ERR(priv->resets[rst])) {
204 err = PTR_ERR(priv->resets[rst]);
205 if (err == -EPROBE_DEFER)
206 goto err_reset;
207 priv->resets[rst] = NULL;
208 break;
209 }
210 err = reset_control_deassert(priv->resets[rst]);
211 if (err)
212 goto err_reset;
213 }
214 }
215
216 if (pdata->big_endian_desc)
217 ohci->flags |= OHCI_QUIRK_BE_DESC;
218 if (pdata->big_endian_mmio)
219 ohci->flags |= OHCI_QUIRK_BE_MMIO;
220 if (pdata->no_big_frame_no)
221 ohci->flags |= OHCI_QUIRK_FRAME_NO;
222 if (pdata->num_ports)
223 ohci->num_ports = pdata->num_ports;
224
225#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
226 if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
227 dev_err(&dev->dev,
228 "Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
229 err = -EINVAL;
230 goto err_reset;
231 }
232#endif
233#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
234 if (ohci->flags & OHCI_QUIRK_BE_DESC) {
235 dev_err(&dev->dev,
236 "Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
237 err = -EINVAL;
238 goto err_reset;
239 }
240#endif
241
242 if (pdata->power_on) {
243 err = pdata->power_on(dev);
244 if (err < 0)
245 goto err_reset;
246 }
247
248 res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
249 hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
250 if (IS_ERR(hcd->regs)) {
251 err = PTR_ERR(hcd->regs);
252 goto err_power;
253 }
254 hcd->rsrc_start = res_mem->start;
255 hcd->rsrc_len = resource_size(res_mem);
256
257 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
258 if (err)
259 goto err_power;
260
261 device_wakeup_enable(hcd->self.controller);
262
263 platform_set_drvdata(dev, hcd);
264
265 return err;
266
267err_power:
268 if (pdata->power_off)
269 pdata->power_off(dev);
270err_reset:
271 while (--rst >= 0)
272 reset_control_assert(priv->resets[rst]);
273err_put_clks:
274 while (--clk >= 0)
275 clk_put(priv->clks[clk]);
276err_put_hcd:
277 if (pdata == &ohci_platform_defaults)
278 dev->dev.platform_data = NULL;
279
280 usb_put_hcd(hcd);
281
282 return err;
283}
284
285static int ohci_platform_remove(struct platform_device *dev)
286{
287 struct usb_hcd *hcd = platform_get_drvdata(dev);
288 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
289 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
290 int clk, rst;
291
292 usb_remove_hcd(hcd);
293
294 if (pdata->power_off)
295 pdata->power_off(dev);
296
297 for (rst = 0; rst < OHCI_MAX_RESETS && priv->resets[rst]; rst++)
298 reset_control_assert(priv->resets[rst]);
299
300 for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
301 clk_put(priv->clks[clk]);
302
303 usb_put_hcd(hcd);
304
305 if (pdata == &ohci_platform_defaults)
306 dev->dev.platform_data = NULL;
307
308 return 0;
309}
310
311#ifdef CONFIG_PM_SLEEP
312static int ohci_platform_suspend(struct device *dev)
313{
314 struct usb_hcd *hcd = dev_get_drvdata(dev);
315 struct usb_ohci_pdata *pdata = dev->platform_data;
316 struct platform_device *pdev = to_platform_device(dev);
317 bool do_wakeup = device_may_wakeup(dev);
318 int ret;
319
320 ret = ohci_suspend(hcd, do_wakeup);
321 if (ret)
322 return ret;
323
324 if (pdata->power_suspend)
325 pdata->power_suspend(pdev);
326
327 return ret;
328}
329
330static int ohci_platform_resume(struct device *dev)
331{
332 struct usb_hcd *hcd = dev_get_drvdata(dev);
333 struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
334 struct platform_device *pdev = to_platform_device(dev);
335
336 if (pdata->power_on) {
337 int err = pdata->power_on(pdev);
338 if (err < 0)
339 return err;
340 }
341
342 ohci_resume(hcd, false);
343 return 0;
344}
345#endif /* CONFIG_PM_SLEEP */
346
347static const struct of_device_id ohci_platform_ids[] = {
348 { .compatible = "generic-ohci", },
349 { .compatible = "cavium,octeon-6335-ohci", },
350 { }
351};
352MODULE_DEVICE_TABLE(of, ohci_platform_ids);
353
354static const struct platform_device_id ohci_platform_table[] = {
355 { "ohci-platform", 0 },
356 { }
357};
358MODULE_DEVICE_TABLE(platform, ohci_platform_table);
359
360static SIMPLE_DEV_PM_OPS(ohci_platform_pm_ops, ohci_platform_suspend,
361 ohci_platform_resume);
362
363static struct platform_driver ohci_platform_driver = {
364 .id_table = ohci_platform_table,
365 .probe = ohci_platform_probe,
366 .remove = ohci_platform_remove,
367 .shutdown = usb_hcd_platform_shutdown,
368 .driver = {
369 .name = "ohci-platform",
370 .pm = &ohci_platform_pm_ops,
371 .of_match_table = ohci_platform_ids,
372 }
373};
374
375static int __init ohci_platform_init(void)
376{
377 if (usb_disabled())
378 return -ENODEV;
379
380 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
381
382 ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
383 return platform_driver_register(&ohci_platform_driver);
384}
385module_init(ohci_platform_init);
386
387static void __exit ohci_platform_cleanup(void)
388{
389 platform_driver_unregister(&ohci_platform_driver);
390}
391module_exit(ohci_platform_cleanup);
392
393MODULE_DESCRIPTION(DRIVER_DESC);
394MODULE_AUTHOR("Hauke Mehrtens");
395MODULE_AUTHOR("Alan Stern");
396MODULE_LICENSE("GPL");