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14#include <linux/clk.h>
15#include <linux/of.h>
16#include <linux/platform_device.h>
17#include <linux/platform_data/usb-ohci-exynos.h>
18#include <linux/usb/phy.h>
19#include <linux/usb/samsung_usb_phy.h>
20
21struct exynos_ohci_hcd {
22 struct device *dev;
23 struct usb_hcd *hcd;
24 struct clk *clk;
25 struct usb_phy *phy;
26 struct usb_otg *otg;
27 struct exynos4_ohci_platdata *pdata;
28};
29
30static void exynos_ohci_phy_enable(struct exynos_ohci_hcd *exynos_ohci)
31{
32 struct platform_device *pdev = to_platform_device(exynos_ohci->dev);
33
34 if (exynos_ohci->phy)
35 usb_phy_init(exynos_ohci->phy);
36 else if (exynos_ohci->pdata && exynos_ohci->pdata->phy_init)
37 exynos_ohci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST);
38}
39
40static void exynos_ohci_phy_disable(struct exynos_ohci_hcd *exynos_ohci)
41{
42 struct platform_device *pdev = to_platform_device(exynos_ohci->dev);
43
44 if (exynos_ohci->phy)
45 usb_phy_shutdown(exynos_ohci->phy);
46 else if (exynos_ohci->pdata && exynos_ohci->pdata->phy_exit)
47 exynos_ohci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST);
48}
49
50static int ohci_exynos_reset(struct usb_hcd *hcd)
51{
52 return ohci_init(hcd_to_ohci(hcd));
53}
54
55static int ohci_exynos_start(struct usb_hcd *hcd)
56{
57 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
58 int ret;
59
60 ohci_dbg(ohci, "ohci_exynos_start, ohci:%p", ohci);
61
62 ret = ohci_run(ohci);
63 if (ret < 0) {
64 dev_err(hcd->self.controller, "can't start %s\n",
65 hcd->self.bus_name);
66 ohci_stop(hcd);
67 return ret;
68 }
69
70 return 0;
71}
72
73static const struct hc_driver exynos_ohci_hc_driver = {
74 .description = hcd_name,
75 .product_desc = "EXYNOS OHCI Host Controller",
76 .hcd_priv_size = sizeof(struct ohci_hcd),
77
78 .irq = ohci_irq,
79 .flags = HCD_MEMORY|HCD_USB11,
80
81 .reset = ohci_exynos_reset,
82 .start = ohci_exynos_start,
83 .stop = ohci_stop,
84 .shutdown = ohci_shutdown,
85
86 .get_frame_number = ohci_get_frame,
87
88 .urb_enqueue = ohci_urb_enqueue,
89 .urb_dequeue = ohci_urb_dequeue,
90 .endpoint_disable = ohci_endpoint_disable,
91
92 .hub_status_data = ohci_hub_status_data,
93 .hub_control = ohci_hub_control,
94#ifdef CONFIG_PM
95 .bus_suspend = ohci_bus_suspend,
96 .bus_resume = ohci_bus_resume,
97#endif
98 .start_port_reset = ohci_start_port_reset,
99};
100
101static int exynos_ohci_probe(struct platform_device *pdev)
102{
103 struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
104 struct exynos_ohci_hcd *exynos_ohci;
105 struct usb_hcd *hcd;
106 struct ohci_hcd *ohci;
107 struct resource *res;
108 struct usb_phy *phy;
109 int irq;
110 int err;
111
112
113
114
115
116
117 if (!pdev->dev.dma_mask)
118 pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
119 if (!pdev->dev.coherent_dma_mask)
120 pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
121
122 exynos_ohci = devm_kzalloc(&pdev->dev, sizeof(struct exynos_ohci_hcd),
123 GFP_KERNEL);
124 if (!exynos_ohci)
125 return -ENOMEM;
126
127 if (of_device_is_compatible(pdev->dev.of_node,
128 "samsung,exynos5440-ohci"))
129 goto skip_phy;
130
131 phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
132 if (IS_ERR(phy)) {
133
134 if (!pdata) {
135 dev_warn(&pdev->dev, "no platform data or transceiver defined\n");
136 return -EPROBE_DEFER;
137 } else {
138 exynos_ohci->pdata = pdata;
139 }
140 } else {
141 exynos_ohci->phy = phy;
142 exynos_ohci->otg = phy->otg;
143 }
144
145skip_phy:
146
147 exynos_ohci->dev = &pdev->dev;
148
149 hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev,
150 dev_name(&pdev->dev));
151 if (!hcd) {
152 dev_err(&pdev->dev, "Unable to create HCD\n");
153 return -ENOMEM;
154 }
155
156 exynos_ohci->hcd = hcd;
157 exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
158
159 if (IS_ERR(exynos_ohci->clk)) {
160 dev_err(&pdev->dev, "Failed to get usbhost clock\n");
161 err = PTR_ERR(exynos_ohci->clk);
162 goto fail_clk;
163 }
164
165 err = clk_prepare_enable(exynos_ohci->clk);
166 if (err)
167 goto fail_clk;
168
169 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
170 if (!res) {
171 dev_err(&pdev->dev, "Failed to get I/O memory\n");
172 err = -ENXIO;
173 goto fail_io;
174 }
175
176 hcd->rsrc_start = res->start;
177 hcd->rsrc_len = resource_size(res);
178 hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
179 if (!hcd->regs) {
180 dev_err(&pdev->dev, "Failed to remap I/O memory\n");
181 err = -ENOMEM;
182 goto fail_io;
183 }
184
185 irq = platform_get_irq(pdev, 0);
186 if (!irq) {
187 dev_err(&pdev->dev, "Failed to get IRQ\n");
188 err = -ENODEV;
189 goto fail_io;
190 }
191
192 if (exynos_ohci->otg)
193 exynos_ohci->otg->set_host(exynos_ohci->otg,
194 &exynos_ohci->hcd->self);
195
196 exynos_ohci_phy_enable(exynos_ohci);
197
198 ohci = hcd_to_ohci(hcd);
199 ohci_hcd_init(ohci);
200
201 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
202 if (err) {
203 dev_err(&pdev->dev, "Failed to add USB HCD\n");
204 goto fail_add_hcd;
205 }
206
207 platform_set_drvdata(pdev, exynos_ohci);
208
209 return 0;
210
211fail_add_hcd:
212 exynos_ohci_phy_disable(exynos_ohci);
213fail_io:
214 clk_disable_unprepare(exynos_ohci->clk);
215fail_clk:
216 usb_put_hcd(hcd);
217 return err;
218}
219
220static int exynos_ohci_remove(struct platform_device *pdev)
221{
222 struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
223 struct usb_hcd *hcd = exynos_ohci->hcd;
224
225 usb_remove_hcd(hcd);
226
227 if (exynos_ohci->otg)
228 exynos_ohci->otg->set_host(exynos_ohci->otg,
229 &exynos_ohci->hcd->self);
230
231 exynos_ohci_phy_disable(exynos_ohci);
232
233 clk_disable_unprepare(exynos_ohci->clk);
234
235 usb_put_hcd(hcd);
236
237 return 0;
238}
239
240static void exynos_ohci_shutdown(struct platform_device *pdev)
241{
242 struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
243 struct usb_hcd *hcd = exynos_ohci->hcd;
244
245 if (hcd->driver->shutdown)
246 hcd->driver->shutdown(hcd);
247}
248
249#ifdef CONFIG_PM
250static int exynos_ohci_suspend(struct device *dev)
251{
252 struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
253 struct usb_hcd *hcd = exynos_ohci->hcd;
254 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
255 unsigned long flags;
256 int rc = 0;
257
258
259
260
261
262
263
264 spin_lock_irqsave(&ohci->lock, flags);
265 if (ohci->rh_state != OHCI_RH_SUSPENDED &&
266 ohci->rh_state != OHCI_RH_HALTED) {
267 rc = -EINVAL;
268 goto fail;
269 }
270
271 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
272
273 if (exynos_ohci->otg)
274 exynos_ohci->otg->set_host(exynos_ohci->otg,
275 &exynos_ohci->hcd->self);
276
277 exynos_ohci_phy_disable(exynos_ohci);
278
279 clk_disable_unprepare(exynos_ohci->clk);
280
281fail:
282 spin_unlock_irqrestore(&ohci->lock, flags);
283
284 return rc;
285}
286
287static int exynos_ohci_resume(struct device *dev)
288{
289 struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
290 struct usb_hcd *hcd = exynos_ohci->hcd;
291
292 clk_prepare_enable(exynos_ohci->clk);
293
294 if (exynos_ohci->otg)
295 exynos_ohci->otg->set_host(exynos_ohci->otg,
296 &exynos_ohci->hcd->self);
297
298 exynos_ohci_phy_enable(exynos_ohci);
299
300 ohci_resume(hcd, false);
301
302 return 0;
303}
304#else
305#define exynos_ohci_suspend NULL
306#define exynos_ohci_resume NULL
307#endif
308
309static const struct dev_pm_ops exynos_ohci_pm_ops = {
310 .suspend = exynos_ohci_suspend,
311 .resume = exynos_ohci_resume,
312};
313
314#ifdef CONFIG_OF
315static const struct of_device_id exynos_ohci_match[] = {
316 { .compatible = "samsung,exynos4210-ohci" },
317 { .compatible = "samsung,exynos5440-ohci" },
318 {},
319};
320MODULE_DEVICE_TABLE(of, exynos_ohci_match);
321#endif
322
323static struct platform_driver exynos_ohci_driver = {
324 .probe = exynos_ohci_probe,
325 .remove = exynos_ohci_remove,
326 .shutdown = exynos_ohci_shutdown,
327 .driver = {
328 .name = "exynos-ohci",
329 .owner = THIS_MODULE,
330 .pm = &exynos_ohci_pm_ops,
331 .of_match_table = of_match_ptr(exynos_ohci_match),
332 }
333};
334
335MODULE_ALIAS("platform:exynos-ohci");
336MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
337
