Merge tag 'dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / usb / dwc3 / dwc3-omap.c
1 /**
2  * dwc3-omap.c - OMAP Specific Glue layer
3  *
4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
5  *
6  * Authors: Felipe Balbi <balbi@ti.com>,
7  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions, and the following disclaimer,
14  *    without modification.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. The names of the above-listed copyright holders may not be used
19  *    to endorse or promote products derived from this software without
20  *    specific prior written permission.
21  *
22  * ALTERNATIVELY, this software may be distributed under the terms of the
23  * GNU General Public License ("GPL") version 2, as published by the Free
24  * Software Foundation.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
27  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
28  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
30  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37  */
38
39 #include <linux/module.h>
40 #include <linux/kernel.h>
41 #include <linux/slab.h>
42 #include <linux/interrupt.h>
43 #include <linux/spinlock.h>
44 #include <linux/platform_device.h>
45 #include <linux/platform_data/dwc3-omap.h>
46 #include <linux/dma-mapping.h>
47 #include <linux/ioport.h>
48 #include <linux/io.h>
49 #include <linux/of.h>
50
51 #include <linux/usb/otg.h>
52 #include <linux/usb/nop-usb-xceiv.h>
53
54 #include "core.h"
55
56 /*
57  * All these registers belong to OMAP's Wrapper around the
58  * DesignWare USB3 Core.
59  */
60
61 #define USBOTGSS_REVISION                       0x0000
62 #define USBOTGSS_SYSCONFIG                      0x0010
63 #define USBOTGSS_IRQ_EOI                        0x0020
64 #define USBOTGSS_IRQSTATUS_RAW_0                0x0024
65 #define USBOTGSS_IRQSTATUS_0                    0x0028
66 #define USBOTGSS_IRQENABLE_SET_0                0x002c
67 #define USBOTGSS_IRQENABLE_CLR_0                0x0030
68 #define USBOTGSS_IRQSTATUS_RAW_1                0x0034
69 #define USBOTGSS_IRQSTATUS_1                    0x0038
70 #define USBOTGSS_IRQENABLE_SET_1                0x003c
71 #define USBOTGSS_IRQENABLE_CLR_1                0x0040
72 #define USBOTGSS_UTMI_OTG_CTRL                  0x0080
73 #define USBOTGSS_UTMI_OTG_STATUS                0x0084
74 #define USBOTGSS_MMRAM_OFFSET                   0x0100
75 #define USBOTGSS_FLADJ                          0x0104
76 #define USBOTGSS_DEBUG_CFG                      0x0108
77 #define USBOTGSS_DEBUG_DATA                     0x010c
78
79 /* SYSCONFIG REGISTER */
80 #define USBOTGSS_SYSCONFIG_DMADISABLE           (1 << 16)
81 #define USBOTGSS_SYSCONFIG_STANDBYMODE(x)       ((x) << 4)
82
83 #define USBOTGSS_STANDBYMODE_FORCE_STANDBY      0
84 #define USBOTGSS_STANDBYMODE_NO_STANDBY         1
85 #define USBOTGSS_STANDBYMODE_SMART_STANDBY      2
86 #define USBOTGSS_STANDBYMODE_SMART_WAKEUP       3
87
88 #define USBOTGSS_STANDBYMODE_MASK               (0x03 << 4)
89
90 #define USBOTGSS_SYSCONFIG_IDLEMODE(x)          ((x) << 2)
91
92 #define USBOTGSS_IDLEMODE_FORCE_IDLE            0
93 #define USBOTGSS_IDLEMODE_NO_IDLE               1
94 #define USBOTGSS_IDLEMODE_SMART_IDLE            2
95 #define USBOTGSS_IDLEMODE_SMART_WAKEUP          3
96
97 #define USBOTGSS_IDLEMODE_MASK                  (0x03 << 2)
98
99 /* IRQ_EOI REGISTER */
100 #define USBOTGSS_IRQ_EOI_LINE_NUMBER            (1 << 0)
101
102 /* IRQS0 BITS */
103 #define USBOTGSS_IRQO_COREIRQ_ST                (1 << 0)
104
105 /* IRQ1 BITS */
106 #define USBOTGSS_IRQ1_DMADISABLECLR             (1 << 17)
107 #define USBOTGSS_IRQ1_OEVT                      (1 << 16)
108 #define USBOTGSS_IRQ1_DRVVBUS_RISE              (1 << 13)
109 #define USBOTGSS_IRQ1_CHRGVBUS_RISE             (1 << 12)
110 #define USBOTGSS_IRQ1_DISCHRGVBUS_RISE          (1 << 11)
111 #define USBOTGSS_IRQ1_IDPULLUP_RISE             (1 << 8)
112 #define USBOTGSS_IRQ1_DRVVBUS_FALL              (1 << 5)
113 #define USBOTGSS_IRQ1_CHRGVBUS_FALL             (1 << 4)
114 #define USBOTGSS_IRQ1_DISCHRGVBUS_FALL          (1 << 3)
115 #define USBOTGSS_IRQ1_IDPULLUP_FALL             (1 << 0)
116
117 /* UTMI_OTG_CTRL REGISTER */
118 #define USBOTGSS_UTMI_OTG_CTRL_DRVVBUS          (1 << 5)
119 #define USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS         (1 << 4)
120 #define USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS      (1 << 3)
121 #define USBOTGSS_UTMI_OTG_CTRL_IDPULLUP         (1 << 0)
122
123 /* UTMI_OTG_STATUS REGISTER */
124 #define USBOTGSS_UTMI_OTG_STATUS_SW_MODE        (1 << 31)
125 #define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT   (1 << 9)
126 #define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE (1 << 8)
127 #define USBOTGSS_UTMI_OTG_STATUS_IDDIG          (1 << 4)
128 #define USBOTGSS_UTMI_OTG_STATUS_SESSEND        (1 << 3)
129 #define USBOTGSS_UTMI_OTG_STATUS_SESSVALID      (1 << 2)
130 #define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID      (1 << 1)
131
132 struct dwc3_omap {
133         /* device lock */
134         spinlock_t              lock;
135
136         struct platform_device  *dwc3;
137         struct platform_device  *usb2_phy;
138         struct platform_device  *usb3_phy;
139         struct device           *dev;
140
141         int                     irq;
142         void __iomem            *base;
143
144         void                    *context;
145         u32                     resource_size;
146
147         u32                     dma_status:1;
148 };
149
150 static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
151 {
152         return readl(base + offset);
153 }
154
155 static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
156 {
157         writel(value, base + offset);
158 }
159
160 static int __devinit dwc3_omap_register_phys(struct dwc3_omap *omap)
161 {
162         struct nop_usb_xceiv_platform_data pdata;
163         struct platform_device  *pdev;
164         int                     ret;
165
166         memset(&pdata, 0x00, sizeof(pdata));
167
168         pdev = platform_device_alloc("nop_usb_xceiv", 0);
169         if (!pdev)
170                 return -ENOMEM;
171
172         omap->usb2_phy = pdev;
173         pdata.type = USB_PHY_TYPE_USB2;
174
175         ret = platform_device_add_data(omap->usb2_phy, &pdata, sizeof(pdata));
176         if (ret)
177                 goto err1;
178
179         pdev = platform_device_alloc("nop_usb_xceiv", 1);
180         if (!pdev) {
181                 ret = -ENOMEM;
182                 goto err1;
183         }
184
185         omap->usb3_phy = pdev;
186         pdata.type = USB_PHY_TYPE_USB3;
187
188         ret = platform_device_add_data(omap->usb3_phy, &pdata, sizeof(pdata));
189         if (ret)
190                 goto err2;
191
192         ret = platform_device_add(omap->usb2_phy);
193         if (ret)
194                 goto err2;
195
196         ret = platform_device_add(omap->usb3_phy);
197         if (ret)
198                 goto err3;
199
200         return 0;
201
202 err3:
203         platform_device_del(omap->usb2_phy);
204
205 err2:
206         platform_device_put(omap->usb3_phy);
207
208 err1:
209         platform_device_put(omap->usb2_phy);
210
211         return ret;
212 }
213
214 static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
215 {
216         struct dwc3_omap        *omap = _omap;
217         u32                     reg;
218
219         spin_lock(&omap->lock);
220
221         reg = dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_1);
222
223         if (reg & USBOTGSS_IRQ1_DMADISABLECLR) {
224                 dev_dbg(omap->dev, "DMA Disable was Cleared\n");
225                 omap->dma_status = false;
226         }
227
228         if (reg & USBOTGSS_IRQ1_OEVT)
229                 dev_dbg(omap->dev, "OTG Event\n");
230
231         if (reg & USBOTGSS_IRQ1_DRVVBUS_RISE)
232                 dev_dbg(omap->dev, "DRVVBUS Rise\n");
233
234         if (reg & USBOTGSS_IRQ1_CHRGVBUS_RISE)
235                 dev_dbg(omap->dev, "CHRGVBUS Rise\n");
236
237         if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_RISE)
238                 dev_dbg(omap->dev, "DISCHRGVBUS Rise\n");
239
240         if (reg & USBOTGSS_IRQ1_IDPULLUP_RISE)
241                 dev_dbg(omap->dev, "IDPULLUP Rise\n");
242
243         if (reg & USBOTGSS_IRQ1_DRVVBUS_FALL)
244                 dev_dbg(omap->dev, "DRVVBUS Fall\n");
245
246         if (reg & USBOTGSS_IRQ1_CHRGVBUS_FALL)
247                 dev_dbg(omap->dev, "CHRGVBUS Fall\n");
248
249         if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_FALL)
250                 dev_dbg(omap->dev, "DISCHRGVBUS Fall\n");
251
252         if (reg & USBOTGSS_IRQ1_IDPULLUP_FALL)
253                 dev_dbg(omap->dev, "IDPULLUP Fall\n");
254
255         dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_1, reg);
256
257         reg = dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_0);
258         dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_0, reg);
259
260         spin_unlock(&omap->lock);
261
262         return IRQ_HANDLED;
263 }
264
265 static int __devinit dwc3_omap_probe(struct platform_device *pdev)
266 {
267         struct dwc3_omap_data   *pdata = pdev->dev.platform_data;
268         struct device_node      *node = pdev->dev.of_node;
269
270         struct platform_device  *dwc3;
271         struct dwc3_omap        *omap;
272         struct resource         *res;
273         struct device           *dev = &pdev->dev;
274
275         int                     devid;
276         int                     size;
277         int                     ret = -ENOMEM;
278         int                     irq;
279
280         const u32               *utmi_mode;
281         u32                     reg;
282
283         void __iomem            *base;
284         void                    *context;
285
286         omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
287         if (!omap) {
288                 dev_err(dev, "not enough memory\n");
289                 return -ENOMEM;
290         }
291
292         platform_set_drvdata(pdev, omap);
293
294         irq = platform_get_irq(pdev, 1);
295         if (irq < 0) {
296                 dev_err(dev, "missing IRQ resource\n");
297                 return -EINVAL;
298         }
299
300         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
301         if (!res) {
302                 dev_err(dev, "missing memory base resource\n");
303                 return -EINVAL;
304         }
305
306         base = devm_ioremap_nocache(dev, res->start, resource_size(res));
307         if (!base) {
308                 dev_err(dev, "ioremap failed\n");
309                 return -ENOMEM;
310         }
311
312         ret = dwc3_omap_register_phys(omap);
313         if (ret) {
314                 dev_err(dev, "couldn't register PHYs\n");
315                 return ret;
316         }
317
318         devid = dwc3_get_device_id();
319         if (devid < 0)
320                 return -ENODEV;
321
322         dwc3 = platform_device_alloc("dwc3", devid);
323         if (!dwc3) {
324                 dev_err(dev, "couldn't allocate dwc3 device\n");
325                 goto err1;
326         }
327
328         context = devm_kzalloc(dev, resource_size(res), GFP_KERNEL);
329         if (!context) {
330                 dev_err(dev, "couldn't allocate dwc3 context memory\n");
331                 goto err2;
332         }
333
334         spin_lock_init(&omap->lock);
335         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
336
337         dwc3->dev.parent = dev;
338         dwc3->dev.dma_mask = dev->dma_mask;
339         dwc3->dev.dma_parms = dev->dma_parms;
340         omap->resource_size = resource_size(res);
341         omap->context   = context;
342         omap->dev       = dev;
343         omap->irq       = irq;
344         omap->base      = base;
345         omap->dwc3      = dwc3;
346
347         reg = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
348
349         utmi_mode = of_get_property(node, "utmi-mode", &size);
350         if (utmi_mode && size == sizeof(*utmi_mode)) {
351                 reg |= *utmi_mode;
352         } else {
353                 if (!pdata) {
354                         dev_dbg(dev, "missing platform data\n");
355                 } else {
356                         switch (pdata->utmi_mode) {
357                         case DWC3_OMAP_UTMI_MODE_SW:
358                                 reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
359                                 break;
360                         case DWC3_OMAP_UTMI_MODE_HW:
361                                 reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
362                                 break;
363                         default:
364                                 dev_dbg(dev, "UNKNOWN utmi mode %d\n",
365                                                 pdata->utmi_mode);
366                         }
367                 }
368         }
369
370         dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, reg);
371
372         /* check the DMA Status */
373         reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
374         omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
375
376         /* Set No-Idle and No-Standby */
377         reg &= ~(USBOTGSS_STANDBYMODE_MASK
378                         | USBOTGSS_IDLEMODE_MASK);
379
380         reg |= (USBOTGSS_SYSCONFIG_STANDBYMODE(USBOTGSS_STANDBYMODE_NO_STANDBY)
381                 | USBOTGSS_SYSCONFIG_IDLEMODE(USBOTGSS_IDLEMODE_NO_IDLE));
382
383         dwc3_omap_writel(omap->base, USBOTGSS_SYSCONFIG, reg);
384
385         ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0,
386                         "dwc3-omap", omap);
387         if (ret) {
388                 dev_err(dev, "failed to request IRQ #%d --> %d\n",
389                                 omap->irq, ret);
390                 goto err2;
391         }
392
393         /* enable all IRQs */
394         reg = USBOTGSS_IRQO_COREIRQ_ST;
395         dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0, reg);
396
397         reg = (USBOTGSS_IRQ1_OEVT |
398                         USBOTGSS_IRQ1_DRVVBUS_RISE |
399                         USBOTGSS_IRQ1_CHRGVBUS_RISE |
400                         USBOTGSS_IRQ1_DISCHRGVBUS_RISE |
401                         USBOTGSS_IRQ1_IDPULLUP_RISE |
402                         USBOTGSS_IRQ1_DRVVBUS_FALL |
403                         USBOTGSS_IRQ1_CHRGVBUS_FALL |
404                         USBOTGSS_IRQ1_DISCHRGVBUS_FALL |
405                         USBOTGSS_IRQ1_IDPULLUP_FALL);
406
407         dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_1, reg);
408
409         ret = platform_device_add_resources(dwc3, pdev->resource,
410                         pdev->num_resources);
411         if (ret) {
412                 dev_err(dev, "couldn't add resources to dwc3 device\n");
413                 goto err2;
414         }
415
416         ret = platform_device_add(dwc3);
417         if (ret) {
418                 dev_err(dev, "failed to register dwc3 device\n");
419                 goto err2;
420         }
421
422         return 0;
423
424 err2:
425         platform_device_put(dwc3);
426
427 err1:
428         dwc3_put_device_id(devid);
429
430         return ret;
431 }
432
433 static int __devexit dwc3_omap_remove(struct platform_device *pdev)
434 {
435         struct dwc3_omap        *omap = platform_get_drvdata(pdev);
436
437         platform_device_unregister(omap->dwc3);
438         platform_device_unregister(omap->usb2_phy);
439         platform_device_unregister(omap->usb3_phy);
440
441         dwc3_put_device_id(omap->dwc3->id);
442
443         return 0;
444 }
445
446 static const struct of_device_id of_dwc3_matach[] = {
447         {
448                 "ti,dwc3",
449         },
450         { },
451 };
452 MODULE_DEVICE_TABLE(of, of_dwc3_matach);
453
454 static struct platform_driver dwc3_omap_driver = {
455         .probe          = dwc3_omap_probe,
456         .remove         = __devexit_p(dwc3_omap_remove),
457         .driver         = {
458                 .name   = "omap-dwc3",
459                 .of_match_table = of_dwc3_matach,
460         },
461 };
462
463 module_platform_driver(dwc3_omap_driver);
464
465 MODULE_ALIAS("platform:omap-dwc3");
466 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
467 MODULE_LICENSE("Dual BSD/GPL");
468 MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");