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usb: otg: Convert all users to pass struct usb_otg for OTG functions
[uclinux-h8/linux.git] / drivers / usb / host / ehci-mv.c
1 /*
2  * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
3  * Author: Chao Xie <chao.xie@marvell.com>
4  *        Neil Zhang <zhangwm@marvell.com>
5  *
6  * This program is free software; you can redistribute  it and/or modify it
7  * under  the terms of  the GNU General  Public License as published by the
8  * Free Software Foundation;  either version 2 of the  License, or (at your
9  * option) any later version.
10  */
11
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/clk.h>
16 #include <linux/usb/otg.h>
17 #include <linux/platform_data/mv_usb.h>
18
19 #define CAPLENGTH_MASK         (0xff)
20
21 struct ehci_hcd_mv {
22         struct usb_hcd *hcd;
23
24         /* Which mode does this ehci running OTG/Host ? */
25         int mode;
26
27         void __iomem *phy_regs;
28         void __iomem *cap_regs;
29         void __iomem *op_regs;
30
31         struct usb_phy *otg;
32
33         struct mv_usb_platform_data *pdata;
34
35         /* clock source and total clock number */
36         unsigned int clknum;
37         struct clk *clk[0];
38 };
39
40 static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)
41 {
42         unsigned int i;
43
44         for (i = 0; i < ehci_mv->clknum; i++)
45                 clk_enable(ehci_mv->clk[i]);
46 }
47
48 static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
49 {
50         unsigned int i;
51
52         for (i = 0; i < ehci_mv->clknum; i++)
53                 clk_disable(ehci_mv->clk[i]);
54 }
55
56 static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
57 {
58         int retval;
59
60         ehci_clock_enable(ehci_mv);
61         if (ehci_mv->pdata->phy_init) {
62                 retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs);
63                 if (retval)
64                         return retval;
65         }
66
67         return 0;
68 }
69
70 static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)
71 {
72         if (ehci_mv->pdata->phy_deinit)
73                 ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs);
74         ehci_clock_disable(ehci_mv);
75 }
76
77 static int mv_ehci_reset(struct usb_hcd *hcd)
78 {
79         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
80         struct device *dev = hcd->self.controller;
81         struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev);
82         int retval;
83
84         if (ehci_mv == NULL) {
85                 dev_err(dev, "Can not find private ehci data\n");
86                 return -ENODEV;
87         }
88
89         /*
90          * data structure init
91          */
92         retval = ehci_init(hcd);
93         if (retval) {
94                 dev_err(dev, "ehci_init failed %d\n", retval);
95                 return retval;
96         }
97
98         hcd->has_tt = 1;
99         ehci->sbrn = 0x20;
100
101         retval = ehci_reset(ehci);
102         if (retval) {
103                 dev_err(dev, "ehci_reset failed %d\n", retval);
104                 return retval;
105         }
106
107         return 0;
108 }
109
110 static const struct hc_driver mv_ehci_hc_driver = {
111         .description = hcd_name,
112         .product_desc = "Marvell EHCI",
113         .hcd_priv_size = sizeof(struct ehci_hcd),
114
115         /*
116          * generic hardware linkage
117          */
118         .irq = ehci_irq,
119         .flags = HCD_MEMORY | HCD_USB2,
120
121         /*
122          * basic lifecycle operations
123          */
124         .reset = mv_ehci_reset,
125         .start = ehci_run,
126         .stop = ehci_stop,
127         .shutdown = ehci_shutdown,
128
129         /*
130          * managing i/o requests and associated device resources
131          */
132         .urb_enqueue = ehci_urb_enqueue,
133         .urb_dequeue = ehci_urb_dequeue,
134         .endpoint_disable = ehci_endpoint_disable,
135         .endpoint_reset = ehci_endpoint_reset,
136         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
137
138         /*
139          * scheduling support
140          */
141         .get_frame_number = ehci_get_frame,
142
143         /*
144          * root hub support
145          */
146         .hub_status_data = ehci_hub_status_data,
147         .hub_control = ehci_hub_control,
148         .bus_suspend = ehci_bus_suspend,
149         .bus_resume = ehci_bus_resume,
150 };
151
152 static int mv_ehci_probe(struct platform_device *pdev)
153 {
154         struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
155         struct usb_hcd *hcd;
156         struct ehci_hcd *ehci;
157         struct ehci_hcd_mv *ehci_mv;
158         struct resource *r;
159         int clk_i, retval = -ENODEV;
160         u32 offset;
161         size_t size;
162
163         if (!pdata) {
164                 dev_err(&pdev->dev, "missing platform_data\n");
165                 return -ENODEV;
166         }
167
168         if (usb_disabled())
169                 return -ENODEV;
170
171         hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci");
172         if (!hcd)
173                 return -ENOMEM;
174
175         size = sizeof(*ehci_mv) + sizeof(struct clk *) * pdata->clknum;
176         ehci_mv = kzalloc(size, GFP_KERNEL);
177         if (ehci_mv == NULL) {
178                 dev_err(&pdev->dev, "cannot allocate ehci_hcd_mv\n");
179                 retval = -ENOMEM;
180                 goto err_put_hcd;
181         }
182
183         platform_set_drvdata(pdev, ehci_mv);
184         ehci_mv->pdata = pdata;
185         ehci_mv->hcd = hcd;
186
187         ehci_mv->clknum = pdata->clknum;
188         for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++) {
189                 ehci_mv->clk[clk_i] =
190                     clk_get(&pdev->dev, pdata->clkname[clk_i]);
191                 if (IS_ERR(ehci_mv->clk[clk_i])) {
192                         dev_err(&pdev->dev, "error get clck \"%s\"\n",
193                                 pdata->clkname[clk_i]);
194                         retval = PTR_ERR(ehci_mv->clk[clk_i]);
195                         goto err_put_clk;
196                 }
197         }
198
199         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs");
200         if (r == NULL) {
201                 dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
202                 retval = -ENODEV;
203                 goto err_put_clk;
204         }
205
206         ehci_mv->phy_regs = ioremap(r->start, resource_size(r));
207         if (ehci_mv->phy_regs == 0) {
208                 dev_err(&pdev->dev, "failed to map phy I/O memory\n");
209                 retval = -EFAULT;
210                 goto err_put_clk;
211         }
212
213         r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs");
214         if (!r) {
215                 dev_err(&pdev->dev, "no I/O memory resource defined\n");
216                 retval = -ENODEV;
217                 goto err_iounmap_phyreg;
218         }
219
220         ehci_mv->cap_regs = ioremap(r->start, resource_size(r));
221         if (ehci_mv->cap_regs == NULL) {
222                 dev_err(&pdev->dev, "failed to map I/O memory\n");
223                 retval = -EFAULT;
224                 goto err_iounmap_phyreg;
225         }
226
227         retval = mv_ehci_enable(ehci_mv);
228         if (retval) {
229                 dev_err(&pdev->dev, "init phy error %d\n", retval);
230                 goto err_iounmap_capreg;
231         }
232
233         offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK;
234         ehci_mv->op_regs =
235                 (void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset);
236
237         hcd->rsrc_start = r->start;
238         hcd->rsrc_len = r->end - r->start + 1;
239         hcd->regs = ehci_mv->op_regs;
240
241         hcd->irq = platform_get_irq(pdev, 0);
242         if (!hcd->irq) {
243                 dev_err(&pdev->dev, "Cannot get irq.");
244                 retval = -ENODEV;
245                 goto err_disable_clk;
246         }
247
248         ehci = hcd_to_ehci(hcd);
249         ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs;
250         ehci->regs = (struct ehci_regs *) ehci_mv->op_regs;
251         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
252
253         ehci_mv->mode = pdata->mode;
254         if (ehci_mv->mode == MV_USB_MODE_OTG) {
255 #ifdef CONFIG_USB_OTG_UTILS
256                 ehci_mv->otg = usb_get_transceiver();
257                 if (!ehci_mv->otg) {
258                         dev_err(&pdev->dev,
259                                 "unable to find transceiver\n");
260                         retval = -ENODEV;
261                         goto err_disable_clk;
262                 }
263
264                 retval = otg_set_host(ehci_mv->otg->otg, &hcd->self);
265                 if (retval < 0) {
266                         dev_err(&pdev->dev,
267                                 "unable to register with transceiver\n");
268                         retval = -ENODEV;
269                         goto err_put_transceiver;
270                 }
271                 /* otg will enable clock before use as host */
272                 mv_ehci_disable(ehci_mv);
273 #else
274                 dev_info(&pdev->dev, "MV_USB_MODE_OTG "
275                          "must have CONFIG_USB_OTG_UTILS enabled\n");
276                 goto err_disable_clk;
277 #endif
278         } else {
279                 if (pdata->set_vbus)
280                         pdata->set_vbus(1);
281
282                 retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
283                 if (retval) {
284                         dev_err(&pdev->dev,
285                                 "failed to add hcd with err %d\n", retval);
286                         goto err_set_vbus;
287                 }
288         }
289
290         if (pdata->private_init)
291                 pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs);
292
293         dev_info(&pdev->dev,
294                  "successful find EHCI device with regs 0x%p irq %d"
295                  " working in %s mode\n", hcd->regs, hcd->irq,
296                  ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host");
297
298         return 0;
299
300 err_set_vbus:
301         if (pdata->set_vbus)
302                 pdata->set_vbus(0);
303 #ifdef CONFIG_USB_OTG_UTILS
304 err_put_transceiver:
305         if (ehci_mv->otg)
306                 usb_put_transceiver(ehci_mv->otg);
307 #endif
308 err_disable_clk:
309         mv_ehci_disable(ehci_mv);
310 err_iounmap_capreg:
311         iounmap(ehci_mv->cap_regs);
312 err_iounmap_phyreg:
313         iounmap(ehci_mv->phy_regs);
314 err_put_clk:
315         for (clk_i--; clk_i >= 0; clk_i--)
316                 clk_put(ehci_mv->clk[clk_i]);
317         platform_set_drvdata(pdev, NULL);
318         kfree(ehci_mv);
319 err_put_hcd:
320         usb_put_hcd(hcd);
321
322         return retval;
323 }
324
325 static int mv_ehci_remove(struct platform_device *pdev)
326 {
327         struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
328         struct usb_hcd *hcd = ehci_mv->hcd;
329         int clk_i;
330
331         if (hcd->rh_registered)
332                 usb_remove_hcd(hcd);
333
334         if (ehci_mv->otg) {
335                 otg_set_host(ehci_mv->otg->otg, NULL);
336                 usb_put_transceiver(ehci_mv->otg);
337         }
338
339         if (ehci_mv->mode == MV_USB_MODE_HOST) {
340                 if (ehci_mv->pdata->set_vbus)
341                         ehci_mv->pdata->set_vbus(0);
342
343                 mv_ehci_disable(ehci_mv);
344         }
345
346         iounmap(ehci_mv->cap_regs);
347         iounmap(ehci_mv->phy_regs);
348
349         for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++)
350                 clk_put(ehci_mv->clk[clk_i]);
351
352         platform_set_drvdata(pdev, NULL);
353
354         kfree(ehci_mv);
355         usb_put_hcd(hcd);
356
357         return 0;
358 }
359
360 MODULE_ALIAS("mv-ehci");
361
362 static const struct platform_device_id ehci_id_table[] = {
363         {"pxa-u2oehci", PXA_U2OEHCI},
364         {"pxa-sph", PXA_SPH},
365         {"mmp3-hsic", MMP3_HSIC},
366         {"mmp3-fsic", MMP3_FSIC},
367         {},
368 };
369
370 static void mv_ehci_shutdown(struct platform_device *pdev)
371 {
372         struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
373         struct usb_hcd *hcd = ehci_mv->hcd;
374
375         if (!hcd->rh_registered)
376                 return;
377
378         if (hcd->driver->shutdown)
379                 hcd->driver->shutdown(hcd);
380 }
381
382 static struct platform_driver ehci_mv_driver = {
383         .probe = mv_ehci_probe,
384         .remove = mv_ehci_remove,
385         .shutdown = mv_ehci_shutdown,
386         .driver = {
387                    .name = "mv-ehci",
388                    .bus = &platform_bus_type,
389                    },
390         .id_table = ehci_id_table,
391 };