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22#include <linux/clk.h>
23#include <linux/device.h>
24#include <linux/dma-mapping.h>
25#include <linux/io.h>
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/of_platform.h>
29#include <linux/of_gpio.h>
30#include <linux/platform_data/usb-ohci-pxa27x.h>
31#include <linux/platform_data/usb-pxa3xx-ulpi.h>
32#include <linux/platform_device.h>
33#include <linux/regulator/consumer.h>
34#include <linux/signal.h>
35#include <linux/usb.h>
36#include <linux/usb/hcd.h>
37#include <linux/usb/otg.h>
38
39#include <mach/hardware.h>
40
41#include "ohci.h"
42
43#define DRIVER_DESC "OHCI PXA27x/PXA3x driver"
44
45
46
47
48#define UHCREV (0x0000)
49#define UHCHCON (0x0004)
50#define UHCCOMS (0x0008)
51#define UHCINTS (0x000C)
52#define UHCINTE (0x0010)
53#define UHCINTD (0x0014)
54#define UHCHCCA (0x0018)
55#define UHCPCED (0x001C)
56#define UHCCHED (0x0020)
57#define UHCCCED (0x0024)
58#define UHCBHED (0x0028)
59#define UHCBCED (0x002C)
60#define UHCDHEAD (0x0030)
61#define UHCFMI (0x0034)
62#define UHCFMR (0x0038)
63#define UHCFMN (0x003C)
64#define UHCPERS (0x0040)
65#define UHCLS (0x0044)
66
67#define UHCRHDA (0x0048)
68#define UHCRHDA_NOCP (1 << 12)
69#define UHCRHDA_OCPM (1 << 11)
70#define UHCRHDA_POTPGT(x) \
71 (((x) & 0xff) << 24)
72
73#define UHCRHDB (0x004C)
74#define UHCRHS (0x0050)
75#define UHCRHPS1 (0x0054)
76#define UHCRHPS2 (0x0058)
77#define UHCRHPS3 (0x005C)
78
79#define UHCSTAT (0x0060)
80#define UHCSTAT_UPS3 (1 << 16)
81#define UHCSTAT_SBMAI (1 << 15)
82#define UHCSTAT_SBTAI (1 << 14)
83#define UHCSTAT_UPRI (1 << 13)
84#define UHCSTAT_UPS2 (1 << 12)
85#define UHCSTAT_UPS1 (1 << 11)
86#define UHCSTAT_HTA (1 << 10)
87#define UHCSTAT_HBA (1 << 8)
88#define UHCSTAT_RWUE (1 << 7)
89
90#define UHCHR (0x0064)
91#define UHCHR_SSEP3 (1 << 11)
92#define UHCHR_SSEP2 (1 << 10)
93#define UHCHR_SSEP1 (1 << 9)
94#define UHCHR_PCPL (1 << 7)
95#define UHCHR_PSPL (1 << 6)
96#define UHCHR_SSE (1 << 5)
97#define UHCHR_UIT (1 << 4)
98#define UHCHR_SSDC (1 << 3)
99#define UHCHR_CGR (1 << 2)
100#define UHCHR_FHR (1 << 1)
101#define UHCHR_FSBIR (1 << 0)
102
103#define UHCHIE (0x0068)
104#define UHCHIE_UPS3IE (1 << 14)
105#define UHCHIE_UPRIE (1 << 13)
106#define UHCHIE_UPS2IE (1 << 12)
107#define UHCHIE_UPS1IE (1 << 11)
108#define UHCHIE_TAIE (1 << 10)
109
110#define UHCHIE_HBAIE (1 << 8)
111#define UHCHIE_RWIE (1 << 7)
112
113#define UHCHIT (0x006C)
114
115#define PXA_UHC_MAX_PORTNUM 3
116
117static const char hcd_name[] = "ohci-pxa27x";
118
119static struct hc_driver __read_mostly ohci_pxa27x_hc_driver;
120
121struct pxa27x_ohci {
122 struct clk *clk;
123 void __iomem *mmio_base;
124 struct regulator *vbus[3];
125 bool vbus_enabled[3];
126};
127
128#define to_pxa27x_ohci(hcd) (struct pxa27x_ohci *)(hcd_to_ohci(hcd)->priv)
129
130
131
132
133
134
135
136
137
138
139
140static int pxa27x_ohci_select_pmm(struct pxa27x_ohci *pxa_ohci, int mode)
141{
142 uint32_t uhcrhda = __raw_readl(pxa_ohci->mmio_base + UHCRHDA);
143 uint32_t uhcrhdb = __raw_readl(pxa_ohci->mmio_base + UHCRHDB);
144
145 switch (mode) {
146 case PMM_NPS_MODE:
147 uhcrhda |= RH_A_NPS;
148 break;
149 case PMM_GLOBAL_MODE:
150 uhcrhda &= ~(RH_A_NPS & RH_A_PSM);
151 break;
152 case PMM_PERPORT_MODE:
153 uhcrhda &= ~(RH_A_NPS);
154 uhcrhda |= RH_A_PSM;
155
156
157 uhcrhdb |= (0x7<<17);
158 break;
159 default:
160 printk( KERN_ERR
161 "Invalid mode %d, set to non-power switch mode.\n",
162 mode );
163
164 uhcrhda |= RH_A_NPS;
165 }
166
167 __raw_writel(uhcrhda, pxa_ohci->mmio_base + UHCRHDA);
168 __raw_writel(uhcrhdb, pxa_ohci->mmio_base + UHCRHDB);
169 return 0;
170}
171
172static int pxa27x_ohci_set_vbus_power(struct pxa27x_ohci *pxa_ohci,
173 unsigned int port, bool enable)
174{
175 struct regulator *vbus = pxa_ohci->vbus[port];
176 int ret = 0;
177
178 if (IS_ERR_OR_NULL(vbus))
179 return 0;
180
181 if (enable && !pxa_ohci->vbus_enabled[port])
182 ret = regulator_enable(vbus);
183 else if (!enable && pxa_ohci->vbus_enabled[port])
184 ret = regulator_disable(vbus);
185
186 if (ret < 0)
187 return ret;
188
189 pxa_ohci->vbus_enabled[port] = enable;
190
191 return 0;
192}
193
194static int pxa27x_ohci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
195 u16 wIndex, char *buf, u16 wLength)
196{
197 struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
198 int ret;
199
200 switch (typeReq) {
201 case SetPortFeature:
202 case ClearPortFeature:
203 if (!wIndex || wIndex > 3)
204 return -EPIPE;
205
206 if (wValue != USB_PORT_FEAT_POWER)
207 break;
208
209 ret = pxa27x_ohci_set_vbus_power(pxa_ohci, wIndex - 1,
210 typeReq == SetPortFeature);
211 if (ret)
212 return ret;
213 break;
214 }
215
216 return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
217}
218
219
220static inline void pxa27x_setup_hc(struct pxa27x_ohci *pxa_ohci,
221 struct pxaohci_platform_data *inf)
222{
223 uint32_t uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR);
224 uint32_t uhcrhda = __raw_readl(pxa_ohci->mmio_base + UHCRHDA);
225
226 if (inf->flags & ENABLE_PORT1)
227 uhchr &= ~UHCHR_SSEP1;
228
229 if (inf->flags & ENABLE_PORT2)
230 uhchr &= ~UHCHR_SSEP2;
231
232 if (inf->flags & ENABLE_PORT3)
233 uhchr &= ~UHCHR_SSEP3;
234
235 if (inf->flags & POWER_CONTROL_LOW)
236 uhchr |= UHCHR_PCPL;
237
238 if (inf->flags & POWER_SENSE_LOW)
239 uhchr |= UHCHR_PSPL;
240
241 if (inf->flags & NO_OC_PROTECTION)
242 uhcrhda |= UHCRHDA_NOCP;
243 else
244 uhcrhda &= ~UHCRHDA_NOCP;
245
246 if (inf->flags & OC_MODE_PERPORT)
247 uhcrhda |= UHCRHDA_OCPM;
248 else
249 uhcrhda &= ~UHCRHDA_OCPM;
250
251 if (inf->power_on_delay) {
252 uhcrhda &= ~UHCRHDA_POTPGT(0xff);
253 uhcrhda |= UHCRHDA_POTPGT(inf->power_on_delay / 2);
254 }
255
256 __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
257 __raw_writel(uhcrhda, pxa_ohci->mmio_base + UHCRHDA);
258}
259
260static inline void pxa27x_reset_hc(struct pxa27x_ohci *pxa_ohci)
261{
262 uint32_t uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR);
263
264 __raw_writel(uhchr | UHCHR_FHR, pxa_ohci->mmio_base + UHCHR);
265 udelay(11);
266 __raw_writel(uhchr & ~UHCHR_FHR, pxa_ohci->mmio_base + UHCHR);
267}
268
269#ifdef CONFIG_PXA27x
270extern void pxa27x_clear_otgph(void);
271#else
272#define pxa27x_clear_otgph() do {} while (0)
273#endif
274
275static int pxa27x_start_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev)
276{
277 int retval = 0;
278 struct pxaohci_platform_data *inf;
279 uint32_t uhchr;
280 struct usb_hcd *hcd = dev_get_drvdata(dev);
281
282 inf = dev_get_platdata(dev);
283
284 clk_prepare_enable(pxa_ohci->clk);
285
286 pxa27x_reset_hc(pxa_ohci);
287
288 uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR) | UHCHR_FSBIR;
289 __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
290
291 while (__raw_readl(pxa_ohci->mmio_base + UHCHR) & UHCHR_FSBIR)
292 cpu_relax();
293
294 pxa27x_setup_hc(pxa_ohci, inf);
295
296 if (inf->init)
297 retval = inf->init(dev);
298
299 if (retval < 0)
300 return retval;
301
302 if (cpu_is_pxa3xx())
303 pxa3xx_u2d_start_hc(&hcd->self);
304
305 uhchr = __raw_readl(pxa_ohci->mmio_base + UHCHR) & ~UHCHR_SSE;
306 __raw_writel(uhchr, pxa_ohci->mmio_base + UHCHR);
307 __raw_writel(UHCHIE_UPRIE | UHCHIE_RWIE, pxa_ohci->mmio_base + UHCHIE);
308
309
310 pxa27x_clear_otgph();
311 return 0;
312}
313
314static void pxa27x_stop_hc(struct pxa27x_ohci *pxa_ohci, struct device *dev)
315{
316 struct pxaohci_platform_data *inf;
317 struct usb_hcd *hcd = dev_get_drvdata(dev);
318 uint32_t uhccoms;
319
320 inf = dev_get_platdata(dev);
321
322 if (cpu_is_pxa3xx())
323 pxa3xx_u2d_stop_hc(&hcd->self);
324
325 if (inf->exit)
326 inf->exit(dev);
327
328 pxa27x_reset_hc(pxa_ohci);
329
330
331 uhccoms = __raw_readl(pxa_ohci->mmio_base + UHCCOMS) | 0x01;
332 __raw_writel(uhccoms, pxa_ohci->mmio_base + UHCCOMS);
333 udelay(10);
334
335 clk_disable_unprepare(pxa_ohci->clk);
336}
337
338#ifdef CONFIG_OF
339static const struct of_device_id pxa_ohci_dt_ids[] = {
340 { .compatible = "marvell,pxa-ohci" },
341 { }
342};
343
344MODULE_DEVICE_TABLE(of, pxa_ohci_dt_ids);
345
346static int ohci_pxa_of_init(struct platform_device *pdev)
347{
348 struct device_node *np = pdev->dev.of_node;
349 struct pxaohci_platform_data *pdata;
350 u32 tmp;
351 int ret;
352
353 if (!np)
354 return 0;
355
356
357
358
359
360 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
361 if (ret)
362 return ret;
363
364 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
365 if (!pdata)
366 return -ENOMEM;
367
368 if (of_get_property(np, "marvell,enable-port1", NULL))
369 pdata->flags |= ENABLE_PORT1;
370 if (of_get_property(np, "marvell,enable-port2", NULL))
371 pdata->flags |= ENABLE_PORT2;
372 if (of_get_property(np, "marvell,enable-port3", NULL))
373 pdata->flags |= ENABLE_PORT3;
374 if (of_get_property(np, "marvell,port-sense-low", NULL))
375 pdata->flags |= POWER_SENSE_LOW;
376 if (of_get_property(np, "marvell,power-control-low", NULL))
377 pdata->flags |= POWER_CONTROL_LOW;
378 if (of_get_property(np, "marvell,no-oc-protection", NULL))
379 pdata->flags |= NO_OC_PROTECTION;
380 if (of_get_property(np, "marvell,oc-mode-perport", NULL))
381 pdata->flags |= OC_MODE_PERPORT;
382 if (!of_property_read_u32(np, "marvell,power-on-delay", &tmp))
383 pdata->power_on_delay = tmp;
384 if (!of_property_read_u32(np, "marvell,port-mode", &tmp))
385 pdata->port_mode = tmp;
386 if (!of_property_read_u32(np, "marvell,power-budget", &tmp))
387 pdata->power_budget = tmp;
388
389 pdev->dev.platform_data = pdata;
390
391 return 0;
392}
393#else
394static int ohci_pxa_of_init(struct platform_device *pdev)
395{
396 return 0;
397}
398#endif
399
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414
415int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev)
416{
417 int retval, irq;
418 struct usb_hcd *hcd;
419 struct pxaohci_platform_data *inf;
420 struct pxa27x_ohci *pxa_ohci;
421 struct ohci_hcd *ohci;
422 struct resource *r;
423 struct clk *usb_clk;
424 unsigned int i;
425
426 retval = ohci_pxa_of_init(pdev);
427 if (retval)
428 return retval;
429
430 inf = dev_get_platdata(&pdev->dev);
431
432 if (!inf)
433 return -ENODEV;
434
435 irq = platform_get_irq(pdev, 0);
436 if (irq < 0) {
437 pr_err("no resource of IORESOURCE_IRQ");
438 return -ENXIO;
439 }
440
441 usb_clk = devm_clk_get(&pdev->dev, NULL);
442 if (IS_ERR(usb_clk))
443 return PTR_ERR(usb_clk);
444
445 hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x");
446 if (!hcd)
447 return -ENOMEM;
448
449 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
450 hcd->regs = devm_ioremap_resource(&pdev->dev, r);
451 if (IS_ERR(hcd->regs)) {
452 retval = PTR_ERR(hcd->regs);
453 goto err;
454 }
455 hcd->rsrc_start = r->start;
456 hcd->rsrc_len = resource_size(r);
457
458
459 pxa_ohci = to_pxa27x_ohci(hcd);
460 pxa_ohci->clk = usb_clk;
461 pxa_ohci->mmio_base = (void __iomem *)hcd->regs;
462
463 for (i = 0; i < 3; ++i) {
464 char name[6];
465
466 if (!(inf->flags & (ENABLE_PORT1 << i)))
467 continue;
468
469 sprintf(name, "vbus%u", i + 1);
470 pxa_ohci->vbus[i] = devm_regulator_get(&pdev->dev, name);
471 }
472
473 retval = pxa27x_start_hc(pxa_ohci, &pdev->dev);
474 if (retval < 0) {
475 pr_debug("pxa27x_start_hc failed");
476 goto err;
477 }
478
479
480 pxa27x_ohci_select_pmm(pxa_ohci, inf->port_mode);
481
482 if (inf->power_budget)
483 hcd->power_budget = inf->power_budget;
484
485
486 ohci = hcd_to_ohci(hcd);
487 ohci->num_ports = 3;
488
489 retval = usb_add_hcd(hcd, irq, 0);
490 if (retval == 0) {
491 device_wakeup_enable(hcd->self.controller);
492 return retval;
493 }
494
495 pxa27x_stop_hc(pxa_ohci, &pdev->dev);
496 err:
497 usb_put_hcd(hcd);
498 return retval;
499}
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515void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev)
516{
517 struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
518 unsigned int i;
519
520 usb_remove_hcd(hcd);
521 pxa27x_stop_hc(pxa_ohci, &pdev->dev);
522
523 for (i = 0; i < 3; ++i)
524 pxa27x_ohci_set_vbus_power(pxa_ohci, i, false);
525
526 usb_put_hcd(hcd);
527}
528
529
530
531static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev)
532{
533 pr_debug ("In ohci_hcd_pxa27x_drv_probe");
534
535 if (usb_disabled())
536 return -ENODEV;
537
538 return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev);
539}
540
541static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev)
542{
543 struct usb_hcd *hcd = platform_get_drvdata(pdev);
544
545 usb_hcd_pxa27x_remove(hcd, pdev);
546 return 0;
547}
548
549#ifdef CONFIG_PM
550static int ohci_hcd_pxa27x_drv_suspend(struct device *dev)
551{
552 struct usb_hcd *hcd = dev_get_drvdata(dev);
553 struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
554 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
555 bool do_wakeup = device_may_wakeup(dev);
556 int ret;
557
558
559 if (time_before(jiffies, ohci->next_statechange))
560 msleep(5);
561 ohci->next_statechange = jiffies;
562
563 ret = ohci_suspend(hcd, do_wakeup);
564 if (ret)
565 return ret;
566
567 pxa27x_stop_hc(pxa_ohci, dev);
568 return ret;
569}
570
571static int ohci_hcd_pxa27x_drv_resume(struct device *dev)
572{
573 struct usb_hcd *hcd = dev_get_drvdata(dev);
574 struct pxa27x_ohci *pxa_ohci = to_pxa27x_ohci(hcd);
575 struct pxaohci_platform_data *inf = dev_get_platdata(dev);
576 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
577 int status;
578
579 if (time_before(jiffies, ohci->next_statechange))
580 msleep(5);
581 ohci->next_statechange = jiffies;
582
583 status = pxa27x_start_hc(pxa_ohci, dev);
584 if (status < 0)
585 return status;
586
587
588 pxa27x_ohci_select_pmm(pxa_ohci, inf->port_mode);
589
590 ohci_resume(hcd, false);
591 return 0;
592}
593
594static const struct dev_pm_ops ohci_hcd_pxa27x_pm_ops = {
595 .suspend = ohci_hcd_pxa27x_drv_suspend,
596 .resume = ohci_hcd_pxa27x_drv_resume,
597};
598#endif
599
600static struct platform_driver ohci_hcd_pxa27x_driver = {
601 .probe = ohci_hcd_pxa27x_drv_probe,
602 .remove = ohci_hcd_pxa27x_drv_remove,
603 .shutdown = usb_hcd_platform_shutdown,
604 .driver = {
605 .name = "pxa27x-ohci",
606 .of_match_table = of_match_ptr(pxa_ohci_dt_ids),
607#ifdef CONFIG_PM
608 .pm = &ohci_hcd_pxa27x_pm_ops,
609#endif
610 },
611};
612
613static const struct ohci_driver_overrides pxa27x_overrides __initconst = {
614 .extra_priv_size = sizeof(struct pxa27x_ohci),
615};
616
617static int __init ohci_pxa27x_init(void)
618{
619 if (usb_disabled())
620 return -ENODEV;
621
622 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
623
624 ohci_init_driver(&ohci_pxa27x_hc_driver, &pxa27x_overrides);
625 ohci_pxa27x_hc_driver.hub_control = pxa27x_ohci_hub_control;
626
627 return platform_driver_register(&ohci_hcd_pxa27x_driver);
628}
629module_init(ohci_pxa27x_init);
630
631static void __exit ohci_pxa27x_cleanup(void)
632{
633 platform_driver_unregister(&ohci_hcd_pxa27x_driver);
634}
635module_exit(ohci_pxa27x_cleanup);
636
637MODULE_DESCRIPTION(DRIVER_DESC);
638MODULE_LICENSE("GPL");
639MODULE_ALIAS("platform:pxa27x-ohci");
640