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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/usb/ohci_pdriver.h>
28#include <linux/usb.h>
29#include <linux/usb/hcd.h>
30
31#include "ohci.h"
32
33#define DRIVER_DESC "OHCI generic platform driver"
34#define OHCI_MAX_CLKS 3
35#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
36
37struct ohci_platform_priv {
38 struct clk *clks[OHCI_MAX_CLKS];
39 struct phy *phy;
40};
41
42static const char hcd_name[] = "ohci-platform";
43
44static int ohci_platform_reset(struct usb_hcd *hcd)
45{
46 struct platform_device *pdev = to_platform_device(hcd->self.controller);
47 struct usb_ohci_pdata *pdata = dev_get_platdata(&pdev->dev);
48 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
49
50 if (pdata->no_big_frame_no)
51 ohci->flags |= OHCI_QUIRK_FRAME_NO;
52 if (pdata->num_ports)
53 ohci->num_ports = pdata->num_ports;
54
55 return ohci_setup(hcd);
56}
57
58static int ohci_platform_power_on(struct platform_device *dev)
59{
60 struct usb_hcd *hcd = platform_get_drvdata(dev);
61 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
62 int clk, ret;
63
64 for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
65 ret = clk_prepare_enable(priv->clks[clk]);
66 if (ret)
67 goto err_disable_clks;
68 }
69
70 if (priv->phy) {
71 ret = phy_init(priv->phy);
72 if (ret)
73 goto err_disable_clks;
74
75 ret = phy_power_on(priv->phy);
76 if (ret)
77 goto err_exit_phy;
78 }
79
80 return 0;
81
82err_exit_phy:
83 phy_exit(priv->phy);
84err_disable_clks:
85 while (--clk >= 0)
86 clk_disable_unprepare(priv->clks[clk]);
87
88 return ret;
89}
90
91static void ohci_platform_power_off(struct platform_device *dev)
92{
93 struct usb_hcd *hcd = platform_get_drvdata(dev);
94 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
95 int clk;
96
97 if (priv->phy) {
98 phy_power_off(priv->phy);
99 phy_exit(priv->phy);
100 }
101
102 for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
103 if (priv->clks[clk])
104 clk_disable_unprepare(priv->clks[clk]);
105}
106
107static struct hc_driver __read_mostly ohci_platform_hc_driver;
108
109static const struct ohci_driver_overrides platform_overrides __initconst = {
110 .product_desc = "Generic Platform OHCI controller",
111 .reset = ohci_platform_reset,
112 .extra_priv_size = sizeof(struct ohci_platform_priv),
113};
114
115static struct usb_ohci_pdata ohci_platform_defaults = {
116 .power_on = ohci_platform_power_on,
117 .power_suspend = ohci_platform_power_off,
118 .power_off = ohci_platform_power_off,
119};
120
121static int ohci_platform_probe(struct platform_device *dev)
122{
123 struct usb_hcd *hcd;
124 struct resource *res_mem;
125 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
126 struct ohci_platform_priv *priv;
127 struct ohci_hcd *ohci;
128 int err, irq, clk = 0;
129
130 if (usb_disabled())
131 return -ENODEV;
132
133 /*
134 * Use reasonable defaults so platforms don't have to provide these
135 * with DT probing on ARM.
136 */
137 if (!pdata)
138 pdata = &ohci_platform_defaults;
139
140 err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
141 if (err)
142 return err;
143
144 irq = platform_get_irq(dev, 0);
145 if (irq < 0) {
146 dev_err(&dev->dev, "no irq provided");
147 return irq;
148 }
149
150 res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
151 if (!res_mem) {
152 dev_err(&dev->dev, "no memory resource provided");
153 return -ENXIO;
154 }
155
156 hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
157 dev_name(&dev->dev));
158 if (!hcd)
159 return -ENOMEM;
160
161 platform_set_drvdata(dev, hcd);
162 dev->dev.platform_data = pdata;
163 priv = hcd_to_ohci_priv(hcd);
164 ohci = hcd_to_ohci(hcd);
165
166 if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
167 if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
168 ohci->flags |= OHCI_QUIRK_BE_MMIO;
169
170 if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
171 ohci->flags |= OHCI_QUIRK_BE_DESC;
172
173 if (of_property_read_bool(dev->dev.of_node, "big-endian"))
174 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
175
176 priv->phy = devm_phy_get(&dev->dev, "usb");
177 if (IS_ERR(priv->phy)) {
178 err = PTR_ERR(priv->phy);
179 if (err == -EPROBE_DEFER)
180 goto err_put_hcd;
181 priv->phy = NULL;
182 }
183
184 for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
185 priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
186 if (IS_ERR(priv->clks[clk])) {
187 err = PTR_ERR(priv->clks[clk]);
188 if (err == -EPROBE_DEFER)
189 goto err_put_clks;
190 priv->clks[clk] = NULL;
191 break;
192 }
193 }
194 }
195
196 if (pdata->big_endian_desc)
197 ohci->flags |= OHCI_QUIRK_BE_DESC;
198 if (pdata->big_endian_mmio)
199 ohci->flags |= OHCI_QUIRK_BE_MMIO;
200
201#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
202 if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
203 dev_err(&dev->dev,
204 "Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
205 err = -EINVAL;
206 goto err_put_clks;
207 }
208#endif
209#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
210 if (ohci->flags & OHCI_QUIRK_BE_DESC) {
211 dev_err(&dev->dev,
212 "Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
213 err = -EINVAL;
214 goto err_put_clks;
215 }
216#endif
217
218 if (pdata->power_on) {
219 err = pdata->power_on(dev);
220 if (err < 0)
221 goto err_put_clks;
222 }
223
224 hcd->rsrc_start = res_mem->start;
225 hcd->rsrc_len = resource_size(res_mem);
226
227 hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
228 if (IS_ERR(hcd->regs)) {
229 err = PTR_ERR(hcd->regs);
230 goto err_power;
231 }
232 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
233 if (err)
234 goto err_power;
235
236 device_wakeup_enable(hcd->self.controller);
237
238 platform_set_drvdata(dev, hcd);
239
240 return err;
241
242err_power:
243 if (pdata->power_off)
244 pdata->power_off(dev);
245err_put_clks:
246 while (--clk >= 0)
247 clk_put(priv->clks[clk]);
248err_put_hcd:
249 if (pdata == &ohci_platform_defaults)
250 dev->dev.platform_data = NULL;
251
252 usb_put_hcd(hcd);
253
254 return err;
255}
256
257static int ohci_platform_remove(struct platform_device *dev)
258{
259 struct usb_hcd *hcd = platform_get_drvdata(dev);
260 struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
261 struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
262 int clk;
263
264 usb_remove_hcd(hcd);
265
266 if (pdata->power_off)
267 pdata->power_off(dev);
268
269 for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
270 clk_put(priv->clks[clk]);
271
272 usb_put_hcd(hcd);
273
274 if (pdata == &ohci_platform_defaults)
275 dev->dev.platform_data = NULL;
276
277 return 0;
278}
279
280#ifdef CONFIG_PM
281
282static int ohci_platform_suspend(struct device *dev)
283{
284 struct usb_hcd *hcd = dev_get_drvdata(dev);
285 struct usb_ohci_pdata *pdata = dev->platform_data;
286 struct platform_device *pdev =
287 container_of(dev, struct platform_device, dev);
288 bool do_wakeup = device_may_wakeup(dev);
289 int ret;
290
291 ret = ohci_suspend(hcd, do_wakeup);
292 if (ret)
293 return ret;
294
295 if (pdata->power_suspend)
296 pdata->power_suspend(pdev);
297
298 return ret;
299}
300
301static int ohci_platform_resume(struct device *dev)
302{
303 struct usb_hcd *hcd = dev_get_drvdata(dev);
304 struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
305 struct platform_device *pdev =
306 container_of(dev, struct platform_device, dev);
307
308 if (pdata->power_on) {
309 int err = pdata->power_on(pdev);
310 if (err < 0)
311 return err;
312 }
313
314 ohci_resume(hcd, false);
315 return 0;
316}
317
318#else /* !CONFIG_PM */
319#define ohci_platform_suspend NULL
320#define ohci_platform_resume NULL
321#endif /* CONFIG_PM */
322
323static const struct of_device_id ohci_platform_ids[] = {
324 { .compatible = "generic-ohci", },
325 { }
326};
327MODULE_DEVICE_TABLE(of, ohci_platform_ids);
328
329static const struct platform_device_id ohci_platform_table[] = {
330 { "ohci-platform", 0 },
331 { }
332};
333MODULE_DEVICE_TABLE(platform, ohci_platform_table);
334
335static const struct dev_pm_ops ohci_platform_pm_ops = {
336 .suspend = ohci_platform_suspend,
337 .resume = ohci_platform_resume,
338};
339
340static struct platform_driver ohci_platform_driver = {
341 .id_table = ohci_platform_table,
342 .probe = ohci_platform_probe,
343 .remove = ohci_platform_remove,
344 .shutdown = usb_hcd_platform_shutdown,
345 .driver = {
346 .owner = THIS_MODULE,
347 .name = "ohci-platform",
348 .pm = &ohci_platform_pm_ops,
349 .of_match_table = ohci_platform_ids,
350 }
351};
352
353static int __init ohci_platform_init(void)
354{
355 if (usb_disabled())
356 return -ENODEV;
357
358 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
359
360 ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
361 return platform_driver_register(&ohci_platform_driver);
362}
363module_init(ohci_platform_init);
364
365static void __exit ohci_platform_cleanup(void)
366{
367 platform_driver_unregister(&ohci_platform_driver);
368}
369module_exit(ohci_platform_cleanup);
370
371MODULE_DESCRIPTION(DRIVER_DESC);
372MODULE_AUTHOR("Hauke Mehrtens");
373MODULE_AUTHOR("Alan Stern");
374MODULE_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 *
7 * Derived from the OCHI-SSB driver
8 * Derived from the OHCI-PCI driver
9 * Copyright 1999 Roman Weissgaerber
10 * Copyright 2000-2002 David Brownell
11 * Copyright 1999 Linus Torvalds
12 * Copyright 1999 Gregory P. Smith
13 *
14 * Licensed under the GNU/GPL. See COPYING for details.
15 */
16#include <linux/platform_device.h>
17#include <linux/usb/ohci_pdriver.h>
18
19static int ohci_platform_reset(struct usb_hcd *hcd)
20{
21 struct platform_device *pdev = to_platform_device(hcd->self.controller);
22 struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
23 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
24 int err;
25
26 if (pdata->big_endian_desc)
27 ohci->flags |= OHCI_QUIRK_BE_DESC;
28 if (pdata->big_endian_mmio)
29 ohci->flags |= OHCI_QUIRK_BE_MMIO;
30 if (pdata->no_big_frame_no)
31 ohci->flags |= OHCI_QUIRK_FRAME_NO;
32
33 ohci_hcd_init(ohci);
34 err = ohci_init(ohci);
35
36 return err;
37}
38
39static int ohci_platform_start(struct usb_hcd *hcd)
40{
41 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
42 int err;
43
44 err = ohci_run(ohci);
45 if (err < 0) {
46 ohci_err(ohci, "can't start\n");
47 ohci_stop(hcd);
48 }
49
50 return err;
51}
52
53static const struct hc_driver ohci_platform_hc_driver = {
54 .description = hcd_name,
55 .product_desc = "Generic Platform OHCI Controller",
56 .hcd_priv_size = sizeof(struct ohci_hcd),
57
58 .irq = ohci_irq,
59 .flags = HCD_MEMORY | HCD_USB11,
60
61 .reset = ohci_platform_reset,
62 .start = ohci_platform_start,
63 .stop = ohci_stop,
64 .shutdown = ohci_shutdown,
65
66 .urb_enqueue = ohci_urb_enqueue,
67 .urb_dequeue = ohci_urb_dequeue,
68 .endpoint_disable = ohci_endpoint_disable,
69
70 .get_frame_number = ohci_get_frame,
71
72 .hub_status_data = ohci_hub_status_data,
73 .hub_control = ohci_hub_control,
74#ifdef CONFIG_PM
75 .bus_suspend = ohci_bus_suspend,
76 .bus_resume = ohci_bus_resume,
77#endif
78
79 .start_port_reset = ohci_start_port_reset,
80};
81
82static int __devinit ohci_platform_probe(struct platform_device *dev)
83{
84 struct usb_hcd *hcd;
85 struct resource *res_mem;
86 int irq;
87 int err = -ENOMEM;
88
89 BUG_ON(!dev->dev.platform_data);
90
91 if (usb_disabled())
92 return -ENODEV;
93
94 irq = platform_get_irq(dev, 0);
95 if (irq < 0) {
96 pr_err("no irq provided");
97 return irq;
98 }
99
100 res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
101 if (!res_mem) {
102 pr_err("no memory recourse provided");
103 return -ENXIO;
104 }
105
106 hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
107 dev_name(&dev->dev));
108 if (!hcd)
109 return -ENOMEM;
110
111 hcd->rsrc_start = res_mem->start;
112 hcd->rsrc_len = resource_size(res_mem);
113
114 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
115 pr_err("controller already in use");
116 err = -EBUSY;
117 goto err_put_hcd;
118 }
119
120 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
121 if (!hcd->regs)
122 goto err_release_region;
123 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
124 if (err)
125 goto err_iounmap;
126
127 platform_set_drvdata(dev, hcd);
128
129 return err;
130
131err_iounmap:
132 iounmap(hcd->regs);
133err_release_region:
134 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
135err_put_hcd:
136 usb_put_hcd(hcd);
137 return err;
138}
139
140static int __devexit ohci_platform_remove(struct platform_device *dev)
141{
142 struct usb_hcd *hcd = platform_get_drvdata(dev);
143
144 usb_remove_hcd(hcd);
145 iounmap(hcd->regs);
146 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
147 usb_put_hcd(hcd);
148 platform_set_drvdata(dev, NULL);
149
150 return 0;
151}
152
153#ifdef CONFIG_PM
154
155static int ohci_platform_suspend(struct device *dev)
156{
157 return 0;
158}
159
160static int ohci_platform_resume(struct device *dev)
161{
162 struct usb_hcd *hcd = dev_get_drvdata(dev);
163
164 ohci_finish_controller_resume(hcd);
165 return 0;
166}
167
168#else /* !CONFIG_PM */
169#define ohci_platform_suspend NULL
170#define ohci_platform_resume NULL
171#endif /* CONFIG_PM */
172
173static const struct platform_device_id ohci_platform_table[] = {
174 { "ohci-platform", 0 },
175 { }
176};
177MODULE_DEVICE_TABLE(platform, ohci_platform_table);
178
179static const struct dev_pm_ops ohci_platform_pm_ops = {
180 .suspend = ohci_platform_suspend,
181 .resume = ohci_platform_resume,
182};
183
184static struct platform_driver ohci_platform_driver = {
185 .id_table = ohci_platform_table,
186 .probe = ohci_platform_probe,
187 .remove = __devexit_p(ohci_platform_remove),
188 .shutdown = usb_hcd_platform_shutdown,
189 .driver = {
190 .owner = THIS_MODULE,
191 .name = "ohci-platform",
192 .pm = &ohci_platform_pm_ops,
193 }
194};