Loading...
Note: File does not exist in v3.1.
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
21struct 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
40static 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
48static 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
56static 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
70static 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
77static 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
110static 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
152static 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
300err_set_vbus:
301 if (pdata->set_vbus)
302 pdata->set_vbus(0);
303#ifdef CONFIG_USB_OTG_UTILS
304err_put_transceiver:
305 if (ehci_mv->otg)
306 usb_put_transceiver(ehci_mv->otg);
307#endif
308err_disable_clk:
309 mv_ehci_disable(ehci_mv);
310err_iounmap_capreg:
311 iounmap(ehci_mv->cap_regs);
312err_iounmap_phyreg:
313 iounmap(ehci_mv->phy_regs);
314err_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);
319err_put_hcd:
320 usb_put_hcd(hcd);
321
322 return retval;
323}
324
325static 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
360MODULE_ALIAS("mv-ehci");
361
362static 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
370static 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
382static 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};