xhci: tegra: support HSIC ports
[linux-3.10.git] / drivers / usb / host / ohci-omap.c
1 /*
2  * OHCI HCD (Host Controller Driver) for USB.
3  *
4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5  * (C) Copyright 2000-2005 David Brownell
6  * (C) Copyright 2002 Hewlett-Packard Company
7  *
8  * OMAP Bus Glue
9  *
10  * Modified for OMAP by Tony Lindgren <tony@atomide.com>
11  * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
12  * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
13  *
14  * This file is licenced under the GPL.
15  */
16
17 #include <linux/signal.h>
18 #include <linux/jiffies.h>
19 #include <linux/platform_device.h>
20 #include <linux/clk.h>
21 #include <linux/err.h>
22 #include <linux/gpio.h>
23
24 #include <asm/io.h>
25 #include <asm/mach-types.h>
26
27 #include <mach/mux.h>
28
29 #include <mach/hardware.h>
30 #include <mach/irqs.h>
31 #include <mach/usb.h>
32
33
34 /* OMAP-1510 OHCI has its own MMU for DMA */
35 #define OMAP1510_LB_MEMSIZE     32      /* Should be same as SDRAM size */
36 #define OMAP1510_LB_CLOCK_DIV   0xfffec10c
37 #define OMAP1510_LB_MMU_CTL     0xfffec208
38 #define OMAP1510_LB_MMU_LCK     0xfffec224
39 #define OMAP1510_LB_MMU_LD_TLB  0xfffec228
40 #define OMAP1510_LB_MMU_CAM_H   0xfffec22c
41 #define OMAP1510_LB_MMU_CAM_L   0xfffec230
42 #define OMAP1510_LB_MMU_RAM_H   0xfffec234
43 #define OMAP1510_LB_MMU_RAM_L   0xfffec238
44
45
46 #ifndef CONFIG_ARCH_OMAP
47 #error "This file is OMAP bus glue.  CONFIG_OMAP must be defined."
48 #endif
49
50 #ifdef CONFIG_TPS65010
51 #include <linux/i2c/tps65010.h>
52 #else
53
54 #define LOW     0
55 #define HIGH    1
56
57 #define GPIO1   1
58
59 static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
60 {
61         return 0;
62 }
63
64 #endif
65
66 extern int usb_disabled(void);
67 extern int ocpi_enable(void);
68
69 static struct clk *usb_host_ck;
70 static struct clk *usb_dc_ck;
71 static int host_enabled;
72 static int host_initialized;
73
74 static void omap_ohci_clock_power(int on)
75 {
76         if (on) {
77                 clk_enable(usb_dc_ck);
78                 clk_enable(usb_host_ck);
79                 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
80                 udelay(100);
81         } else {
82                 clk_disable(usb_host_ck);
83                 clk_disable(usb_dc_ck);
84         }
85 }
86
87 /*
88  * Board specific gang-switched transceiver power on/off.
89  * NOTE:  OSK supplies power from DC, not battery.
90  */
91 static int omap_ohci_transceiver_power(int on)
92 {
93         if (on) {
94                 if (machine_is_omap_innovator() && cpu_is_omap1510())
95                         __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
96                                 | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
97                                INNOVATOR_FPGA_CAM_USB_CONTROL);
98                 else if (machine_is_omap_osk())
99                         tps65010_set_gpio_out_value(GPIO1, LOW);
100         } else {
101                 if (machine_is_omap_innovator() && cpu_is_omap1510())
102                         __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
103                                 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
104                                INNOVATOR_FPGA_CAM_USB_CONTROL);
105                 else if (machine_is_omap_osk())
106                         tps65010_set_gpio_out_value(GPIO1, HIGH);
107         }
108
109         return 0;
110 }
111
112 #ifdef CONFIG_ARCH_OMAP15XX
113 /*
114  * OMAP-1510 specific Local Bus clock on/off
115  */
116 static int omap_1510_local_bus_power(int on)
117 {
118         if (on) {
119                 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
120                 udelay(200);
121         } else {
122                 omap_writel(0, OMAP1510_LB_MMU_CTL);
123         }
124
125         return 0;
126 }
127
128 /*
129  * OMAP-1510 specific Local Bus initialization
130  * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
131  *       See also arch/mach-omap/memory.h for __virt_to_dma() and
132  *       __dma_to_virt() which need to match with the physical
133  *       Local Bus address below.
134  */
135 static int omap_1510_local_bus_init(void)
136 {
137         unsigned int tlb;
138         unsigned long lbaddr, physaddr;
139
140         omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
141                OMAP1510_LB_CLOCK_DIV);
142
143         /* Configure the Local Bus MMU table */
144         for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
145                 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
146                 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
147                 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
148                 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
149                        OMAP1510_LB_MMU_CAM_L);
150                 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
151                 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
152                 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
153                 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
154         }
155
156         /* Enable the walking table */
157         omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
158         udelay(200);
159
160         return 0;
161 }
162 #else
163 #define omap_1510_local_bus_power(x)    {}
164 #define omap_1510_local_bus_init()      {}
165 #endif
166
167 #ifdef  CONFIG_USB_OTG
168
169 static void start_hnp(struct ohci_hcd *ohci)
170 {
171         struct usb_hcd *hcd = ohci_to_hcd(ohci);
172         const unsigned  port = hcd->self.otg_port - 1;
173         unsigned long   flags;
174         u32 l;
175
176         otg_start_hnp(hcd->phy->otg);
177
178         local_irq_save(flags);
179         hcd->phy->state = OTG_STATE_A_SUSPEND;
180         writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
181         l = omap_readl(OTG_CTRL);
182         l &= ~OTG_A_BUSREQ;
183         omap_writel(l, OTG_CTRL);
184         local_irq_restore(flags);
185 }
186
187 #endif
188
189 /*-------------------------------------------------------------------------*/
190
191 static int ohci_omap_init(struct usb_hcd *hcd)
192 {
193         struct ohci_hcd         *ohci = hcd_to_ohci(hcd);
194         struct omap_usb_config  *config = hcd->self.controller->platform_data;
195         int                     need_transceiver = (config->otg != 0);
196         int                     ret;
197
198         dev_dbg(hcd->self.controller, "starting USB Controller\n");
199
200         if (config->otg) {
201                 ohci_to_hcd(ohci)->self.otg_port = config->otg;
202                 /* default/minimum OTG power budget:  8 mA */
203                 ohci_to_hcd(ohci)->power_budget = 8;
204         }
205
206         /* boards can use OTG transceivers in non-OTG modes */
207         need_transceiver = need_transceiver
208                         || machine_is_omap_h2() || machine_is_omap_h3();
209
210         /* XXX OMAP16xx only */
211         if (config->ocpi_enable)
212                 config->ocpi_enable();
213
214 #ifdef  CONFIG_USB_OTG
215         if (need_transceiver) {
216                 hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
217                 if (!IS_ERR_OR_NULL(hcd->phy)) {
218                         int     status = otg_set_host(hcd->phy->otg,
219                                                 &ohci_to_hcd(ohci)->self);
220                         dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
221                                         hcd->phy->label, status);
222                         if (status) {
223                                 usb_put_phy(hcd->phy);
224                                 return status;
225                         }
226                 } else {
227                         dev_err(hcd->self.controller, "can't find phy\n");
228                         return -ENODEV;
229                 }
230                 ohci->start_hnp = start_hnp;
231         }
232 #endif
233
234         omap_ohci_clock_power(1);
235
236         if (cpu_is_omap15xx()) {
237                 omap_1510_local_bus_power(1);
238                 omap_1510_local_bus_init();
239         }
240
241         if ((ret = ohci_init(ohci)) < 0)
242                 return ret;
243
244         /* board-specific power switching and overcurrent support */
245         if (machine_is_omap_osk() || machine_is_omap_innovator()) {
246                 u32     rh = roothub_a (ohci);
247
248                 /* power switching (ganged by default) */
249                 rh &= ~RH_A_NPS;
250
251                 /* TPS2045 switch for internal transceiver (port 1) */
252                 if (machine_is_omap_osk()) {
253                         ohci_to_hcd(ohci)->power_budget = 250;
254
255                         rh &= ~RH_A_NOCP;
256
257                         /* gpio9 for overcurrent detction */
258                         omap_cfg_reg(W8_1610_GPIO9);
259                         gpio_request(9, "OHCI overcurrent");
260                         gpio_direction_input(9);
261
262                         /* for paranoia's sake:  disable USB.PUEN */
263                         omap_cfg_reg(W4_USB_HIGHZ);
264                 }
265                 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
266                 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
267         } else if (machine_is_nokia770()) {
268                 /* We require a self-powered hub, which should have
269                  * plenty of power. */
270                 ohci_to_hcd(ohci)->power_budget = 0;
271         }
272
273         /* FIXME khubd hub requests should manage power switching */
274         omap_ohci_transceiver_power(1);
275
276         /* board init will have already handled HMC and mux setup.
277          * any external transceiver should already be initialized
278          * too, so all configured ports use the right signaling now.
279          */
280
281         return 0;
282 }
283
284 static void ohci_omap_stop(struct usb_hcd *hcd)
285 {
286         dev_dbg(hcd->self.controller, "stopping USB Controller\n");
287         ohci_stop(hcd);
288         omap_ohci_clock_power(0);
289 }
290
291
292 /*-------------------------------------------------------------------------*/
293
294 /**
295  * usb_hcd_omap_probe - initialize OMAP-based HCDs
296  * Context: !in_interrupt()
297  *
298  * Allocates basic resources for this USB host controller, and
299  * then invokes the start() method for the HCD associated with it
300  * through the hotplug entry's driver_data.
301  */
302 static int usb_hcd_omap_probe (const struct hc_driver *driver,
303                           struct platform_device *pdev)
304 {
305         int retval, irq;
306         struct usb_hcd *hcd = 0;
307         struct ohci_hcd *ohci;
308
309         if (pdev->num_resources != 2) {
310                 printk(KERN_ERR "hcd probe: invalid num_resources: %i\n",
311                        pdev->num_resources);
312                 return -ENODEV;
313         }
314
315         if (pdev->resource[0].flags != IORESOURCE_MEM
316                         || pdev->resource[1].flags != IORESOURCE_IRQ) {
317                 printk(KERN_ERR "hcd probe: invalid resource type\n");
318                 return -ENODEV;
319         }
320
321         usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
322         if (IS_ERR(usb_host_ck))
323                 return PTR_ERR(usb_host_ck);
324
325         if (!cpu_is_omap15xx())
326                 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
327         else
328                 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
329
330         if (IS_ERR(usb_dc_ck)) {
331                 clk_put(usb_host_ck);
332                 return PTR_ERR(usb_dc_ck);
333         }
334
335
336         hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
337         if (!hcd) {
338                 retval = -ENOMEM;
339                 goto err0;
340         }
341         hcd->rsrc_start = pdev->resource[0].start;
342         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
343
344         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
345                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
346                 retval = -EBUSY;
347                 goto err1;
348         }
349
350         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
351         if (!hcd->regs) {
352                 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
353                 retval = -ENOMEM;
354                 goto err2;
355         }
356
357         ohci = hcd_to_ohci(hcd);
358         ohci_hcd_init(ohci);
359
360         host_initialized = 0;
361         host_enabled = 1;
362
363         irq = platform_get_irq(pdev, 0);
364         if (irq < 0) {
365                 retval = -ENXIO;
366                 goto err3;
367         }
368         retval = usb_add_hcd(hcd, irq, 0);
369         if (retval)
370                 goto err3;
371
372         host_initialized = 1;
373
374         if (!host_enabled)
375                 omap_ohci_clock_power(0);
376
377         return 0;
378 err3:
379         iounmap(hcd->regs);
380 err2:
381         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
382 err1:
383         usb_put_hcd(hcd);
384 err0:
385         clk_put(usb_dc_ck);
386         clk_put(usb_host_ck);
387         return retval;
388 }
389
390
391 /* may be called with controller, bus, and devices active */
392
393 /**
394  * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
395  * @dev: USB Host Controller being removed
396  * Context: !in_interrupt()
397  *
398  * Reverses the effect of usb_hcd_omap_probe(), first invoking
399  * the HCD's stop() method.  It is always called from a thread
400  * context, normally "rmmod", "apmd", or something similar.
401  */
402 static inline void
403 usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
404 {
405         usb_remove_hcd(hcd);
406         if (!IS_ERR_OR_NULL(hcd->phy)) {
407                 (void) otg_set_host(hcd->phy->otg, 0);
408                 usb_put_phy(hcd->phy);
409         }
410         if (machine_is_omap_osk())
411                 gpio_free(9);
412         iounmap(hcd->regs);
413         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
414         usb_put_hcd(hcd);
415         clk_put(usb_dc_ck);
416         clk_put(usb_host_ck);
417 }
418
419 /*-------------------------------------------------------------------------*/
420
421 static int
422 ohci_omap_start (struct usb_hcd *hcd)
423 {
424         struct omap_usb_config *config;
425         struct ohci_hcd *ohci = hcd_to_ohci (hcd);
426         int             ret;
427
428         if (!host_enabled)
429                 return 0;
430         config = hcd->self.controller->platform_data;
431         if (config->otg || config->rwc) {
432                 ohci->hc_control = OHCI_CTRL_RWC;
433                 writel(OHCI_CTRL_RWC, &ohci->regs->control);
434         }
435
436         if ((ret = ohci_run (ohci)) < 0) {
437                 dev_err(hcd->self.controller, "can't start\n");
438                 ohci_stop (hcd);
439                 return ret;
440         }
441         return 0;
442 }
443
444 /*-------------------------------------------------------------------------*/
445
446 static const struct hc_driver ohci_omap_hc_driver = {
447         .description =          hcd_name,
448         .product_desc =         "OMAP OHCI",
449         .hcd_priv_size =        sizeof(struct ohci_hcd),
450
451         /*
452          * generic hardware linkage
453          */
454         .irq =                  ohci_irq,
455         .flags =                HCD_USB11 | HCD_MEMORY,
456
457         /*
458          * basic lifecycle operations
459          */
460         .reset =                ohci_omap_init,
461         .start =                ohci_omap_start,
462         .stop =                 ohci_omap_stop,
463         .shutdown =             ohci_shutdown,
464
465         /*
466          * managing i/o requests and associated device resources
467          */
468         .urb_enqueue =          ohci_urb_enqueue,
469         .urb_dequeue =          ohci_urb_dequeue,
470         .endpoint_disable =     ohci_endpoint_disable,
471
472         /*
473          * scheduling support
474          */
475         .get_frame_number =     ohci_get_frame,
476
477         /*
478          * root hub support
479          */
480         .hub_status_data =      ohci_hub_status_data,
481         .hub_control =          ohci_hub_control,
482 #ifdef  CONFIG_PM
483         .bus_suspend =          ohci_bus_suspend,
484         .bus_resume =           ohci_bus_resume,
485 #endif
486         .start_port_reset =     ohci_start_port_reset,
487 };
488
489 /*-------------------------------------------------------------------------*/
490
491 static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
492 {
493         return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
494 }
495
496 static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
497 {
498         struct usb_hcd          *hcd = platform_get_drvdata(dev);
499
500         usb_hcd_omap_remove(hcd, dev);
501         platform_set_drvdata(dev, NULL);
502
503         return 0;
504 }
505
506 /*-------------------------------------------------------------------------*/
507
508 #ifdef  CONFIG_PM
509
510 static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
511 {
512         struct ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(dev));
513
514         if (time_before(jiffies, ohci->next_statechange))
515                 msleep(5);
516         ohci->next_statechange = jiffies;
517
518         omap_ohci_clock_power(0);
519         return 0;
520 }
521
522 static int ohci_omap_resume(struct platform_device *dev)
523 {
524         struct usb_hcd  *hcd = platform_get_drvdata(dev);
525         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
526
527         if (time_before(jiffies, ohci->next_statechange))
528                 msleep(5);
529         ohci->next_statechange = jiffies;
530
531         omap_ohci_clock_power(1);
532         ohci_resume(hcd, false);
533         return 0;
534 }
535
536 #endif
537
538 /*-------------------------------------------------------------------------*/
539
540 /*
541  * Driver definition to register with the OMAP bus
542  */
543 static struct platform_driver ohci_hcd_omap_driver = {
544         .probe          = ohci_hcd_omap_drv_probe,
545         .remove         = ohci_hcd_omap_drv_remove,
546         .shutdown       = usb_hcd_platform_shutdown,
547 #ifdef  CONFIG_PM
548         .suspend        = ohci_omap_suspend,
549         .resume         = ohci_omap_resume,
550 #endif
551         .driver         = {
552                 .owner  = THIS_MODULE,
553                 .name   = "ohci",
554         },
555 };
556
557 MODULE_ALIAS("platform:ohci");