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12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/clk.h>
16#include <linux/err.h>
17#include <linux/usb/otg.h>
18#include <linux/platform_data/mv_usb.h>
19
20#define CAPLENGTH_MASK (0xff)
21
22struct ehci_hcd_mv {
23 struct usb_hcd *hcd;
24
25
26 int mode;
27
28 void __iomem *phy_regs;
29 void __iomem *cap_regs;
30 void __iomem *op_regs;
31
32 struct usb_phy *otg;
33
34 struct mv_usb_platform_data *pdata;
35
36 struct clk *clk;
37};
38
39static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)
40{
41 clk_prepare_enable(ehci_mv->clk);
42}
43
44static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
45{
46 clk_disable_unprepare(ehci_mv->clk);
47}
48
49static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
50{
51 int retval;
52
53 ehci_clock_enable(ehci_mv);
54 if (ehci_mv->pdata->phy_init) {
55 retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs);
56 if (retval)
57 return retval;
58 }
59
60 return 0;
61}
62
63static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)
64{
65 if (ehci_mv->pdata->phy_deinit)
66 ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs);
67 ehci_clock_disable(ehci_mv);
68}
69
70static int mv_ehci_reset(struct usb_hcd *hcd)
71{
72 struct device *dev = hcd->self.controller;
73 struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev);
74 int retval;
75
76 if (ehci_mv == NULL) {
77 dev_err(dev, "Can not find private ehci data\n");
78 return -ENODEV;
79 }
80
81 hcd->has_tt = 1;
82
83 retval = ehci_setup(hcd);
84 if (retval)
85 dev_err(dev, "ehci_setup failed %d\n", retval);
86
87 return retval;
88}
89
90static const struct hc_driver mv_ehci_hc_driver = {
91 .description = hcd_name,
92 .product_desc = "Marvell EHCI",
93 .hcd_priv_size = sizeof(struct ehci_hcd),
94
95
96
97
98 .irq = ehci_irq,
99 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
100
101
102
103
104 .reset = mv_ehci_reset,
105 .start = ehci_run,
106 .stop = ehci_stop,
107 .shutdown = ehci_shutdown,
108
109
110
111
112 .urb_enqueue = ehci_urb_enqueue,
113 .urb_dequeue = ehci_urb_dequeue,
114 .endpoint_disable = ehci_endpoint_disable,
115 .endpoint_reset = ehci_endpoint_reset,
116 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
117
118
119
120
121 .get_frame_number = ehci_get_frame,
122
123
124
125
126 .hub_status_data = ehci_hub_status_data,
127 .hub_control = ehci_hub_control,
128 .bus_suspend = ehci_bus_suspend,
129 .bus_resume = ehci_bus_resume,
130};
131
132static int mv_ehci_probe(struct platform_device *pdev)
133{
134 struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
135 struct usb_hcd *hcd;
136 struct ehci_hcd *ehci;
137 struct ehci_hcd_mv *ehci_mv;
138 struct resource *r;
139 int retval = -ENODEV;
140 u32 offset;
141
142 if (!pdata) {
143 dev_err(&pdev->dev, "missing platform_data\n");
144 return -ENODEV;
145 }
146
147 if (usb_disabled())
148 return -ENODEV;
149
150 hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci");
151 if (!hcd)
152 return -ENOMEM;
153
154 ehci_mv = devm_kzalloc(&pdev->dev, sizeof(*ehci_mv), GFP_KERNEL);
155 if (ehci_mv == NULL) {
156 dev_err(&pdev->dev, "cannot allocate ehci_hcd_mv\n");
157 retval = -ENOMEM;
158 goto err_put_hcd;
159 }
160
161 platform_set_drvdata(pdev, ehci_mv);
162 ehci_mv->pdata = pdata;
163 ehci_mv->hcd = hcd;
164
165 ehci_mv->clk = devm_clk_get(&pdev->dev, NULL);
166 if (IS_ERR(ehci_mv->clk)) {
167 dev_err(&pdev->dev, "error getting clock\n");
168 retval = PTR_ERR(ehci_mv->clk);
169 goto err_clear_drvdata;
170 }
171
172 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs");
173 if (r == NULL) {
174 dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
175 retval = -ENODEV;
176 goto err_clear_drvdata;
177 }
178
179 ehci_mv->phy_regs = devm_ioremap(&pdev->dev, r->start,
180 resource_size(r));
181 if (!ehci_mv->phy_regs) {
182 dev_err(&pdev->dev, "failed to map phy I/O memory\n");
183 retval = -EFAULT;
184 goto err_clear_drvdata;
185 }
186
187 r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs");
188 if (!r) {
189 dev_err(&pdev->dev, "no I/O memory resource defined\n");
190 retval = -ENODEV;
191 goto err_clear_drvdata;
192 }
193
194 ehci_mv->cap_regs = devm_ioremap(&pdev->dev, r->start,
195 resource_size(r));
196 if (ehci_mv->cap_regs == NULL) {
197 dev_err(&pdev->dev, "failed to map I/O memory\n");
198 retval = -EFAULT;
199 goto err_clear_drvdata;
200 }
201
202 retval = mv_ehci_enable(ehci_mv);
203 if (retval) {
204 dev_err(&pdev->dev, "init phy error %d\n", retval);
205 goto err_clear_drvdata;
206 }
207
208 offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK;
209 ehci_mv->op_regs =
210 (void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset);
211
212 hcd->rsrc_start = r->start;
213 hcd->rsrc_len = resource_size(r);
214 hcd->regs = ehci_mv->op_regs;
215
216 hcd->irq = platform_get_irq(pdev, 0);
217 if (!hcd->irq) {
218 dev_err(&pdev->dev, "Cannot get irq.");
219 retval = -ENODEV;
220 goto err_disable_clk;
221 }
222
223 ehci = hcd_to_ehci(hcd);
224 ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs;
225
226 ehci_mv->mode = pdata->mode;
227 if (ehci_mv->mode == MV_USB_MODE_OTG) {
228 ehci_mv->otg = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
229 if (IS_ERR(ehci_mv->otg)) {
230 retval = PTR_ERR(ehci_mv->otg);
231
232 if (retval == -ENXIO)
233 dev_info(&pdev->dev, "MV_USB_MODE_OTG "
234 "must have CONFIG_USB_PHY enabled\n");
235 else
236 dev_err(&pdev->dev,
237 "unable to find transceiver\n");
238 goto err_disable_clk;
239 }
240
241 retval = otg_set_host(ehci_mv->otg->otg, &hcd->self);
242 if (retval < 0) {
243 dev_err(&pdev->dev,
244 "unable to register with transceiver\n");
245 retval = -ENODEV;
246 goto err_disable_clk;
247 }
248
249 mv_ehci_disable(ehci_mv);
250 } else {
251 if (pdata->set_vbus)
252 pdata->set_vbus(1);
253
254 retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
255 if (retval) {
256 dev_err(&pdev->dev,
257 "failed to add hcd with err %d\n", retval);
258 goto err_set_vbus;
259 }
260 }
261
262 if (pdata->private_init)
263 pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs);
264
265 dev_info(&pdev->dev,
266 "successful find EHCI device with regs 0x%p irq %d"
267 " working in %s mode\n", hcd->regs, hcd->irq,
268 ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host");
269
270 return 0;
271
272err_set_vbus:
273 if (pdata->set_vbus)
274 pdata->set_vbus(0);
275err_disable_clk:
276 mv_ehci_disable(ehci_mv);
277err_clear_drvdata:
278 platform_set_drvdata(pdev, NULL);
279err_put_hcd:
280 usb_put_hcd(hcd);
281
282 return retval;
283}
284
285static int mv_ehci_remove(struct platform_device *pdev)
286{
287 struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
288 struct usb_hcd *hcd = ehci_mv->hcd;
289
290 if (hcd->rh_registered)
291 usb_remove_hcd(hcd);
292
293 if (!IS_ERR_OR_NULL(ehci_mv->otg))
294 otg_set_host(ehci_mv->otg->otg, NULL);
295
296 if (ehci_mv->mode == MV_USB_MODE_HOST) {
297 if (ehci_mv->pdata->set_vbus)
298 ehci_mv->pdata->set_vbus(0);
299
300 mv_ehci_disable(ehci_mv);
301 }
302
303 platform_set_drvdata(pdev, NULL);
304
305 usb_put_hcd(hcd);
306
307 return 0;
308}
309
310MODULE_ALIAS("mv-ehci");
311
312static const struct platform_device_id ehci_id_table[] = {
313 {"pxa-u2oehci", PXA_U2OEHCI},
314 {"pxa-sph", PXA_SPH},
315 {"mmp3-hsic", MMP3_HSIC},
316 {"mmp3-fsic", MMP3_FSIC},
317 {},
318};
319
320static void mv_ehci_shutdown(struct platform_device *pdev)
321{
322 struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
323 struct usb_hcd *hcd = ehci_mv->hcd;
324
325 if (!hcd->rh_registered)
326 return;
327
328 if (hcd->driver->shutdown)
329 hcd->driver->shutdown(hcd);
330}
331
332static struct platform_driver ehci_mv_driver = {
333 .probe = mv_ehci_probe,
334 .remove = mv_ehci_remove,
335 .shutdown = mv_ehci_shutdown,
336 .driver = {
337 .name = "mv-ehci",
338 .bus = &platform_bus_type,
339 },
340 .id_table = ehci_id_table,
341};
342
