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inet: frag: enforce memory limits earlier
[linux/fpc-iii.git] / drivers / usb / chipidea / usbmisc_imx.c
blob20d02a5e418d936231fcb091e183c6f939d16701
1 /*
2 * Copyright 2012 Freescale Semiconductor, Inc.
3 *
4 * The code contained herein is licensed under the GNU General Public
5 * License. You may obtain a copy of the GNU General Public License
6 * Version 2 or later at the following locations:
7 *
8 * http://www.opensource.org/licenses/gpl-license.html
9 * http://www.gnu.org/copyleft/gpl.html
10 */
11
12 #include <linux/module.h>
13 #include <linux/of_platform.h>
14 #include <linux/err.h>
15 #include <linux/io.h>
16 #include <linux/delay.h>
17
18 #include "ci_hdrc_imx.h"
19
20 #define MX25_USB_PHY_CTRL_OFFSET 0x08
21 #define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23)
22
23 #define MX25_EHCI_INTERFACE_SINGLE_UNI (2 << 0)
24 #define MX25_EHCI_INTERFACE_DIFF_UNI (0 << 0)
25 #define MX25_EHCI_INTERFACE_MASK (0xf)
26
27 #define MX25_OTG_SIC_SHIFT 29
28 #define MX25_OTG_SIC_MASK (0x3 << MX25_OTG_SIC_SHIFT)
29 #define MX25_OTG_PM_BIT BIT(24)
30 #define MX25_OTG_PP_BIT BIT(11)
31 #define MX25_OTG_OCPOL_BIT BIT(3)
32
33 #define MX25_H1_SIC_SHIFT 21
34 #define MX25_H1_SIC_MASK (0x3 << MX25_H1_SIC_SHIFT)
35 #define MX25_H1_PP_BIT BIT(18)
36 #define MX25_H1_PM_BIT BIT(16)
37 #define MX25_H1_IPPUE_UP_BIT BIT(7)
38 #define MX25_H1_IPPUE_DOWN_BIT BIT(6)
39 #define MX25_H1_TLL_BIT BIT(5)
40 #define MX25_H1_USBTE_BIT BIT(4)
41 #define MX25_H1_OCPOL_BIT BIT(2)
42
43 #define MX27_H1_PM_BIT BIT(8)
44 #define MX27_H2_PM_BIT BIT(16)
45 #define MX27_OTG_PM_BIT BIT(24)
46
47 #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08
48 #define MX53_USB_OTG_PHY_CTRL_1_OFFSET 0x0c
49 #define MX53_USB_UH2_CTRL_OFFSET 0x14
50 #define MX53_USB_UH3_CTRL_OFFSET 0x18
51 #define MX53_BM_OVER_CUR_DIS_H1 BIT(5)
52 #define MX53_BM_OVER_CUR_DIS_OTG BIT(8)
53 #define MX53_BM_OVER_CUR_DIS_UHx BIT(30)
54 #define MX53_USB_PHYCTRL1_PLLDIV_MASK 0x3
55 #define MX53_USB_PLL_DIV_24_MHZ 0x01
56
57 #define MX6_BM_NON_BURST_SETTING BIT(1)
58 #define MX6_BM_OVER_CUR_DIS BIT(7)
59 #define MX6_BM_OVER_CUR_POLARITY BIT(8)
60 #define MX6_BM_WAKEUP_ENABLE BIT(10)
61 #define MX6_BM_ID_WAKEUP BIT(16)
62 #define MX6_BM_VBUS_WAKEUP BIT(17)
63 #define MX6SX_BM_DPDM_WAKEUP_EN BIT(29)
64 #define MX6_BM_WAKEUP_INTR BIT(31)
65 #define MX6_USB_OTG1_PHY_CTRL 0x18
66 /* For imx6dql, it is host-only controller, for later imx6, it is otg's */
67 #define MX6_USB_OTG2_PHY_CTRL 0x1c
68 #define MX6SX_USB_VBUS_WAKEUP_SOURCE(v) (v << 8)
69 #define MX6SX_USB_VBUS_WAKEUP_SOURCE_VBUS MX6SX_USB_VBUS_WAKEUP_SOURCE(0)
70 #define MX6SX_USB_VBUS_WAKEUP_SOURCE_AVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(1)
71 #define MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID MX6SX_USB_VBUS_WAKEUP_SOURCE(2)
72 #define MX6SX_USB_VBUS_WAKEUP_SOURCE_SESS_END MX6SX_USB_VBUS_WAKEUP_SOURCE(3)
73
74 #define VF610_OVER_CUR_DIS BIT(7)
75
76 #define MX7D_USBNC_USB_CTRL2 0x4
77 #define MX7D_USB_VBUS_WAKEUP_SOURCE_MASK 0x3
78 #define MX7D_USB_VBUS_WAKEUP_SOURCE(v) (v << 0)
79 #define MX7D_USB_VBUS_WAKEUP_SOURCE_VBUS MX7D_USB_VBUS_WAKEUP_SOURCE(0)
80 #define MX7D_USB_VBUS_WAKEUP_SOURCE_AVALID MX7D_USB_VBUS_WAKEUP_SOURCE(1)
81 #define MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID MX7D_USB_VBUS_WAKEUP_SOURCE(2)
82 #define MX7D_USB_VBUS_WAKEUP_SOURCE_SESS_END MX7D_USB_VBUS_WAKEUP_SOURCE(3)
83
84 struct usbmisc_ops {
85 /* It's called once when probe a usb device */
86 int (*init)(struct imx_usbmisc_data *data);
87 /* It's called once after adding a usb device */
88 int (*post)(struct imx_usbmisc_data *data);
89 /* It's called when we need to enable/disable usb wakeup */
90 int (*set_wakeup)(struct imx_usbmisc_data *data, bool enabled);
91 };
92
93 struct imx_usbmisc {
94 void __iomem *base;
95 spinlock_t lock;
96 const struct usbmisc_ops *ops;
97 };
98
99 static int usbmisc_imx25_init(struct imx_usbmisc_data *data)
100 {
101 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
102 unsigned long flags;
103 u32 val = 0;
104
105 if (data->index > 1)
106 return -EINVAL;
107
108 spin_lock_irqsave(&usbmisc->lock, flags);
109 switch (data->index) {
110 case 0:
111 val = readl(usbmisc->base);
112 val &= ~(MX25_OTG_SIC_MASK | MX25_OTG_PP_BIT);
113 val |= (MX25_EHCI_INTERFACE_DIFF_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_OTG_SIC_SHIFT;
114 val |= (MX25_OTG_PM_BIT | MX25_OTG_OCPOL_BIT);
115 writel(val, usbmisc->base);
116 break;
117 case 1:
118 val = readl(usbmisc->base);
119 val &= ~(MX25_H1_SIC_MASK | MX25_H1_PP_BIT | MX25_H1_IPPUE_UP_BIT);
120 val |= (MX25_EHCI_INTERFACE_SINGLE_UNI & MX25_EHCI_INTERFACE_MASK) << MX25_H1_SIC_SHIFT;
121 val |= (MX25_H1_PM_BIT | MX25_H1_OCPOL_BIT | MX25_H1_TLL_BIT |
122 MX25_H1_USBTE_BIT | MX25_H1_IPPUE_DOWN_BIT);
123
124 writel(val, usbmisc->base);
125
126 break;
127 }
128 spin_unlock_irqrestore(&usbmisc->lock, flags);
129
130 return 0;
131 }
132
133 static int usbmisc_imx25_post(struct imx_usbmisc_data *data)
134 {
135 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
136 void __iomem *reg;
137 unsigned long flags;
138 u32 val;
139
140 if (data->index > 2)
141 return -EINVAL;
142
143 if (data->evdo) {
144 spin_lock_irqsave(&usbmisc->lock, flags);
145 reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET;
146 val = readl(reg);
147 writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg);
148 spin_unlock_irqrestore(&usbmisc->lock, flags);
149 usleep_range(5000, 10000); /* needed to stabilize voltage */
150 }
151
152 return 0;
153 }
154
155 static int usbmisc_imx27_init(struct imx_usbmisc_data *data)
156 {
157 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
158 unsigned long flags;
159 u32 val;
160
161 switch (data->index) {
162 case 0:
163 val = MX27_OTG_PM_BIT;
164 break;
165 case 1:
166 val = MX27_H1_PM_BIT;
167 break;
168 case 2:
169 val = MX27_H2_PM_BIT;
170 break;
171 default:
172 return -EINVAL;
173 }
174
175 spin_lock_irqsave(&usbmisc->lock, flags);
176 if (data->disable_oc)
177 val = readl(usbmisc->base) | val;
178 else
179 val = readl(usbmisc->base) & ~val;
180 writel(val, usbmisc->base);
181 spin_unlock_irqrestore(&usbmisc->lock, flags);
182
183 return 0;
184 }
185
186 static int usbmisc_imx53_init(struct imx_usbmisc_data *data)
187 {
188 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
189 void __iomem *reg = NULL;
190 unsigned long flags;
191 u32 val = 0;
192
193 if (data->index > 3)
194 return -EINVAL;
195
196 /* Select a 24 MHz reference clock for the PHY */
197 val = readl(usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
198 val &= ~MX53_USB_PHYCTRL1_PLLDIV_MASK;
199 val |= MX53_USB_PLL_DIV_24_MHZ;
200 writel(val, usbmisc->base + MX53_USB_OTG_PHY_CTRL_1_OFFSET);
201
202 if (data->disable_oc) {
203 spin_lock_irqsave(&usbmisc->lock, flags);
204 switch (data->index) {
205 case 0:
206 reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
207 val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
208 break;
209 case 1:
210 reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
211 val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
212 break;
213 case 2:
214 reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
215 val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
216 break;
217 case 3:
218 reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
219 val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
220 break;
221 }
222 if (reg && val)
223 writel(val, reg);
224 spin_unlock_irqrestore(&usbmisc->lock, flags);
225 }
226
227 return 0;
228 }
229
230 static int usbmisc_imx6q_set_wakeup
231 (struct imx_usbmisc_data *data, bool enabled)
232 {
233 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
234 unsigned long flags;
235 u32 val;
236 u32 wakeup_setting = (MX6_BM_WAKEUP_ENABLE |
237 MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP);
238 int ret = 0;
239
240 if (data->index > 3)
241 return -EINVAL;
242
243 spin_lock_irqsave(&usbmisc->lock, flags);
244 val = readl(usbmisc->base + data->index * 4);
245 if (enabled) {
246 val |= wakeup_setting;
247 writel(val, usbmisc->base + data->index * 4);
248 } else {
249 if (val & MX6_BM_WAKEUP_INTR)
250 pr_debug("wakeup int at ci_hdrc.%d\n", data->index);
251 val &= ~wakeup_setting;
252 writel(val, usbmisc->base + data->index * 4);
253 }
254 spin_unlock_irqrestore(&usbmisc->lock, flags);
255
256 return ret;
257 }
258
259 static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
260 {
261 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
262 unsigned long flags;
263 u32 reg;
264
265 if (data->index > 3)
266 return -EINVAL;
267
268 spin_lock_irqsave(&usbmisc->lock, flags);
269
270 reg = readl(usbmisc->base + data->index * 4);
271 if (data->disable_oc) {
272 reg |= MX6_BM_OVER_CUR_DIS;
273 } else if (data->oc_polarity == 1) {
274 /* High active */
275 reg &= ~(MX6_BM_OVER_CUR_DIS | MX6_BM_OVER_CUR_POLARITY);
276 }
277 writel(reg, usbmisc->base + data->index * 4);
278
279 /* SoC non-burst setting */
280 reg = readl(usbmisc->base + data->index * 4);
281 writel(reg | MX6_BM_NON_BURST_SETTING,
282 usbmisc->base + data->index * 4);
283
284 spin_unlock_irqrestore(&usbmisc->lock, flags);
285
286 usbmisc_imx6q_set_wakeup(data, false);
287
288 return 0;
289 }
290
291 static int usbmisc_imx6sx_init(struct imx_usbmisc_data *data)
292 {
293 void __iomem *reg = NULL;
294 unsigned long flags;
295 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
296 u32 val;
297
298 usbmisc_imx6q_init(data);
299
300 if (data->index == 0 || data->index == 1) {
301 reg = usbmisc->base + MX6_USB_OTG1_PHY_CTRL + data->index * 4;
302 spin_lock_irqsave(&usbmisc->lock, flags);
303 /* Set vbus wakeup source as bvalid */
304 val = readl(reg);
305 writel(val | MX6SX_USB_VBUS_WAKEUP_SOURCE_BVALID, reg);
306 /*
307 * Disable dp/dm wakeup in device mode when vbus is
308 * not there.
309 */
310 val = readl(usbmisc->base + data->index * 4);
311 writel(val & ~MX6SX_BM_DPDM_WAKEUP_EN,
312 usbmisc->base + data->index * 4);
313 spin_unlock_irqrestore(&usbmisc->lock, flags);
314 }
315
316 return 0;
317 }
318
319 static int usbmisc_vf610_init(struct imx_usbmisc_data *data)
320 {
321 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
322 u32 reg;
323
324 /*
325 * Vybrid only has one misc register set, but in two different
326 * areas. These is reflected in two instances of this driver.
327 */
328 if (data->index >= 1)
329 return -EINVAL;
330
331 if (data->disable_oc) {
332 reg = readl(usbmisc->base);
333 writel(reg | VF610_OVER_CUR_DIS, usbmisc->base);
334 }
335
336 return 0;
337 }
338
339 static int usbmisc_imx7d_set_wakeup
340 (struct imx_usbmisc_data *data, bool enabled)
341 {
342 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
343 unsigned long flags;
344 u32 val;
345 u32 wakeup_setting = (MX6_BM_WAKEUP_ENABLE |
346 MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP);
347
348 spin_lock_irqsave(&usbmisc->lock, flags);
349 val = readl(usbmisc->base);
350 if (enabled) {
351 writel(val | wakeup_setting, usbmisc->base);
352 } else {
353 if (val & MX6_BM_WAKEUP_INTR)
354 dev_dbg(data->dev, "wakeup int\n");
355 writel(val & ~wakeup_setting, usbmisc->base);
356 }
357 spin_unlock_irqrestore(&usbmisc->lock, flags);
358
359 return 0;
360 }
361
362 static int usbmisc_imx7d_init(struct imx_usbmisc_data *data)
363 {
364 struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
365 unsigned long flags;
366 u32 reg;
367
368 if (data->index >= 1)
369 return -EINVAL;
370
371 spin_lock_irqsave(&usbmisc->lock, flags);
372 reg = readl(usbmisc->base);
373 if (data->disable_oc) {
374 reg |= MX6_BM_OVER_CUR_DIS;
375 } else if (data->oc_polarity == 1) {
376 /* High active */
377 reg &= ~(MX6_BM_OVER_CUR_DIS | MX6_BM_OVER_CUR_POLARITY);
378 }
379 writel(reg, usbmisc->base);
380
381 reg = readl(usbmisc->base + MX7D_USBNC_USB_CTRL2);
382 reg &= ~MX7D_USB_VBUS_WAKEUP_SOURCE_MASK;
383 writel(reg | MX7D_USB_VBUS_WAKEUP_SOURCE_BVALID,
384 usbmisc->base + MX7D_USBNC_USB_CTRL2);
385 spin_unlock_irqrestore(&usbmisc->lock, flags);
386
387 usbmisc_imx7d_set_wakeup(data, false);
388
389 return 0;
390 }
391
392 static const struct usbmisc_ops imx25_usbmisc_ops = {
393 .init = usbmisc_imx25_init,
394 .post = usbmisc_imx25_post,
395 };
396
397 static const struct usbmisc_ops imx27_usbmisc_ops = {
398 .init = usbmisc_imx27_init,
399 };
400
401 static const struct usbmisc_ops imx53_usbmisc_ops = {
402 .init = usbmisc_imx53_init,
403 };
404
405 static const struct usbmisc_ops imx6q_usbmisc_ops = {
406 .set_wakeup = usbmisc_imx6q_set_wakeup,
407 .init = usbmisc_imx6q_init,
408 };
409
410 static const struct usbmisc_ops vf610_usbmisc_ops = {
411 .init = usbmisc_vf610_init,
412 };
413
414 static const struct usbmisc_ops imx6sx_usbmisc_ops = {
415 .set_wakeup = usbmisc_imx6q_set_wakeup,
416 .init = usbmisc_imx6sx_init,
417 };
418
419 static const struct usbmisc_ops imx7d_usbmisc_ops = {
420 .init = usbmisc_imx7d_init,
421 .set_wakeup = usbmisc_imx7d_set_wakeup,
422 };
423
424 int imx_usbmisc_init(struct imx_usbmisc_data *data)
425 {
426 struct imx_usbmisc *usbmisc;
427
428 if (!data)
429 return 0;
430
431 usbmisc = dev_get_drvdata(data->dev);
432 if (!usbmisc->ops->init)
433 return 0;
434 return usbmisc->ops->init(data);
435 }
436 EXPORT_SYMBOL_GPL(imx_usbmisc_init);
437
438 int imx_usbmisc_init_post(struct imx_usbmisc_data *data)
439 {
440 struct imx_usbmisc *usbmisc;
441
442 if (!data)
443 return 0;
444
445 usbmisc = dev_get_drvdata(data->dev);
446 if (!usbmisc->ops->post)
447 return 0;
448 return usbmisc->ops->post(data);
449 }
450 EXPORT_SYMBOL_GPL(imx_usbmisc_init_post);
451
452 int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled)
453 {
454 struct imx_usbmisc *usbmisc;
455
456 if (!data)
457 return 0;
458
459 usbmisc = dev_get_drvdata(data->dev);
460 if (!usbmisc->ops->set_wakeup)
461 return 0;
462 return usbmisc->ops->set_wakeup(data, enabled);
463 }
464 EXPORT_SYMBOL_GPL(imx_usbmisc_set_wakeup);
465
466 static const struct of_device_id usbmisc_imx_dt_ids[] = {
467 {
468 .compatible = "fsl,imx25-usbmisc",
469 .data = &imx25_usbmisc_ops,
470 },
471 {
472 .compatible = "fsl,imx35-usbmisc",
473 .data = &imx25_usbmisc_ops,
474 },
475 {
476 .compatible = "fsl,imx27-usbmisc",
477 .data = &imx27_usbmisc_ops,
478 },
479 {
480 .compatible = "fsl,imx51-usbmisc",
481 .data = &imx53_usbmisc_ops,
482 },
483 {
484 .compatible = "fsl,imx53-usbmisc",
485 .data = &imx53_usbmisc_ops,
486 },
487 {
488 .compatible = "fsl,imx6q-usbmisc",
489 .data = &imx6q_usbmisc_ops,
490 },
491 {
492 .compatible = "fsl,vf610-usbmisc",
493 .data = &vf610_usbmisc_ops,
494 },
495 {
496 .compatible = "fsl,imx6sx-usbmisc",
497 .data = &imx6sx_usbmisc_ops,
498 },
499 {
500 .compatible = "fsl,imx6ul-usbmisc",
501 .data = &imx6sx_usbmisc_ops,
502 },
503 {
504 .compatible = "fsl,imx7d-usbmisc",
505 .data = &imx7d_usbmisc_ops,
506 },
507 { /* sentinel */ }
508 };
509 MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids);
510
511 static int usbmisc_imx_probe(struct platform_device *pdev)
512 {
513 struct resource *res;
514 struct imx_usbmisc *data;
515 const struct of_device_id *of_id;
516
517 of_id = of_match_device(usbmisc_imx_dt_ids, &pdev->dev);
518 if (!of_id)
519 return -ENODEV;
520
521 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
522 if (!data)
523 return -ENOMEM;
524
525 spin_lock_init(&data->lock);
526
527 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
528 data->base = devm_ioremap_resource(&pdev->dev, res);
529 if (IS_ERR(data->base))
530 return PTR_ERR(data->base);
531
532 data->ops = (const struct usbmisc_ops *)of_id->data;
533 platform_set_drvdata(pdev, data);
534
535 return 0;
536 }
537
538 static int usbmisc_imx_remove(struct platform_device *pdev)
539 {
540 return 0;
541 }
542
543 static struct platform_driver usbmisc_imx_driver = {
544 .probe = usbmisc_imx_probe,
545 .remove = usbmisc_imx_remove,
546 .driver = {
547 .name = "usbmisc_imx",
548 .of_match_table = usbmisc_imx_dt_ids,
549 },
550 };
551
552 module_platform_driver(usbmisc_imx_driver);
553
554 MODULE_ALIAS("platform:usbmisc-imx");
555 MODULE_LICENSE("GPL v2");
556 MODULE_DESCRIPTION("driver for imx usb non-core registers");
557 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
Linux with added FPC-III support