Merge branch 'bcache-for-3.14' of git://evilpiepirate.org/~kent/linux-bcache into...
[platform/adaptation/renesas_rcar/renesas_kernel.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/clk.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/err.h>
20 #include <linux/gpio.h>
21 #include <linux/io.h>
22 #include <linux/jiffies.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/usb/otg.h>
26 #include <linux/platform_device.h>
27 #include <linux/signal.h>
28 #include <linux/usb.h>
29 #include <linux/usb/hcd.h>
30
31 #include "ohci.h"
32
33 #include <asm/io.h>
34 #include <asm/mach-types.h>
35
36 #include <mach/mux.h>
37
38 #include <mach/hardware.h>
39 #include <mach/irqs.h>
40 #include <mach/usb.h>
41
42
43 /* OMAP-1510 OHCI has its own MMU for DMA */
44 #define OMAP1510_LB_MEMSIZE     32      /* Should be same as SDRAM size */
45 #define OMAP1510_LB_CLOCK_DIV   0xfffec10c
46 #define OMAP1510_LB_MMU_CTL     0xfffec208
47 #define OMAP1510_LB_MMU_LCK     0xfffec224
48 #define OMAP1510_LB_MMU_LD_TLB  0xfffec228
49 #define OMAP1510_LB_MMU_CAM_H   0xfffec22c
50 #define OMAP1510_LB_MMU_CAM_L   0xfffec230
51 #define OMAP1510_LB_MMU_RAM_H   0xfffec234
52 #define OMAP1510_LB_MMU_RAM_L   0xfffec238
53
54 #define DRIVER_DESC "OHCI OMAP driver"
55
56 #ifdef CONFIG_TPS65010
57 #include <linux/i2c/tps65010.h>
58 #else
59
60 #define LOW     0
61 #define HIGH    1
62
63 #define GPIO1   1
64
65 static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
66 {
67         return 0;
68 }
69
70 #endif
71
72 extern int usb_disabled(void);
73 extern int ocpi_enable(void);
74
75 static struct clk *usb_host_ck;
76 static struct clk *usb_dc_ck;
77
78 static const char hcd_name[] = "ohci-omap";
79 static struct hc_driver __read_mostly ohci_omap_hc_driver;
80
81 static void omap_ohci_clock_power(int on)
82 {
83         if (on) {
84                 clk_enable(usb_dc_ck);
85                 clk_enable(usb_host_ck);
86                 /* guesstimate for T5 == 1x 32K clock + APLL lock time */
87                 udelay(100);
88         } else {
89                 clk_disable(usb_host_ck);
90                 clk_disable(usb_dc_ck);
91         }
92 }
93
94 /*
95  * Board specific gang-switched transceiver power on/off.
96  * NOTE:  OSK supplies power from DC, not battery.
97  */
98 static int omap_ohci_transceiver_power(int on)
99 {
100         if (on) {
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, LOW);
107         } else {
108                 if (machine_is_omap_innovator() && cpu_is_omap1510())
109                         __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL)
110                                 & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)),
111                                INNOVATOR_FPGA_CAM_USB_CONTROL);
112                 else if (machine_is_omap_osk())
113                         tps65010_set_gpio_out_value(GPIO1, HIGH);
114         }
115
116         return 0;
117 }
118
119 #ifdef CONFIG_ARCH_OMAP15XX
120 /*
121  * OMAP-1510 specific Local Bus clock on/off
122  */
123 static int omap_1510_local_bus_power(int on)
124 {
125         if (on) {
126                 omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
127                 udelay(200);
128         } else {
129                 omap_writel(0, OMAP1510_LB_MMU_CTL);
130         }
131
132         return 0;
133 }
134
135 /*
136  * OMAP-1510 specific Local Bus initialization
137  * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
138  *       See also arch/mach-omap/memory.h for __virt_to_dma() and
139  *       __dma_to_virt() which need to match with the physical
140  *       Local Bus address below.
141  */
142 static int omap_1510_local_bus_init(void)
143 {
144         unsigned int tlb;
145         unsigned long lbaddr, physaddr;
146
147         omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4,
148                OMAP1510_LB_CLOCK_DIV);
149
150         /* Configure the Local Bus MMU table */
151         for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
152                 lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
153                 physaddr = tlb * 0x00100000 + PHYS_OFFSET;
154                 omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
155                 omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc,
156                        OMAP1510_LB_MMU_CAM_L);
157                 omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
158                 omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
159                 omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
160                 omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
161         }
162
163         /* Enable the walking table */
164         omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
165         udelay(200);
166
167         return 0;
168 }
169 #else
170 #define omap_1510_local_bus_power(x)    {}
171 #define omap_1510_local_bus_init()      {}
172 #endif
173
174 #ifdef  CONFIG_USB_OTG
175
176 static void start_hnp(struct ohci_hcd *ohci)
177 {
178         struct usb_hcd *hcd = ohci_to_hcd(ohci);
179         const unsigned  port = hcd->self.otg_port - 1;
180         unsigned long   flags;
181         u32 l;
182
183         otg_start_hnp(hcd->phy->otg);
184
185         local_irq_save(flags);
186         hcd->phy->state = OTG_STATE_A_SUSPEND;
187         writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
188         l = omap_readl(OTG_CTRL);
189         l &= ~OTG_A_BUSREQ;
190         omap_writel(l, OTG_CTRL);
191         local_irq_restore(flags);
192 }
193
194 #endif
195
196 /*-------------------------------------------------------------------------*/
197
198 static int ohci_omap_reset(struct usb_hcd *hcd)
199 {
200         struct ohci_hcd         *ohci = hcd_to_ohci(hcd);
201         struct omap_usb_config  *config = dev_get_platdata(hcd->self.controller);
202         int                     need_transceiver = (config->otg != 0);
203         int                     ret;
204
205         dev_dbg(hcd->self.controller, "starting USB Controller\n");
206
207         if (config->otg) {
208                 hcd->self.otg_port = config->otg;
209                 /* default/minimum OTG power budget:  8 mA */
210                 hcd->power_budget = 8;
211         }
212
213         /* boards can use OTG transceivers in non-OTG modes */
214         need_transceiver = need_transceiver
215                         || machine_is_omap_h2() || machine_is_omap_h3();
216
217         /* XXX OMAP16xx only */
218         if (config->ocpi_enable)
219                 config->ocpi_enable();
220
221 #ifdef  CONFIG_USB_OTG
222         if (need_transceiver) {
223                 hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
224                 if (!IS_ERR_OR_NULL(hcd->phy)) {
225                         int     status = otg_set_host(hcd->phy->otg,
226                                                 &ohci_to_hcd(ohci)->self);
227                         dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
228                                         hcd->phy->label, status);
229                         if (status) {
230                                 usb_put_phy(hcd->phy);
231                                 return status;
232                         }
233                 } else {
234                         dev_err(hcd->self.controller, "can't find phy\n");
235                         return -ENODEV;
236                 }
237                 ohci->start_hnp = start_hnp;
238         }
239 #endif
240
241         omap_ohci_clock_power(1);
242
243         if (cpu_is_omap15xx()) {
244                 omap_1510_local_bus_power(1);
245                 omap_1510_local_bus_init();
246         }
247
248         ret = ohci_setup(hcd);
249         if (ret < 0)
250                 return ret;
251
252         if (config->otg || config->rwc) {
253                 ohci->hc_control = OHCI_CTRL_RWC;
254                 writel(OHCI_CTRL_RWC, &ohci->regs->control);
255         }
256
257         /* board-specific power switching and overcurrent support */
258         if (machine_is_omap_osk() || machine_is_omap_innovator()) {
259                 u32     rh = roothub_a (ohci);
260
261                 /* power switching (ganged by default) */
262                 rh &= ~RH_A_NPS;
263
264                 /* TPS2045 switch for internal transceiver (port 1) */
265                 if (machine_is_omap_osk()) {
266                         ohci_to_hcd(ohci)->power_budget = 250;
267
268                         rh &= ~RH_A_NOCP;
269
270                         /* gpio9 for overcurrent detction */
271                         omap_cfg_reg(W8_1610_GPIO9);
272                         gpio_request(9, "OHCI overcurrent");
273                         gpio_direction_input(9);
274
275                         /* for paranoia's sake:  disable USB.PUEN */
276                         omap_cfg_reg(W4_USB_HIGHZ);
277                 }
278                 ohci_writel(ohci, rh, &ohci->regs->roothub.a);
279                 ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
280         } else if (machine_is_nokia770()) {
281                 /* We require a self-powered hub, which should have
282                  * plenty of power. */
283                 ohci_to_hcd(ohci)->power_budget = 0;
284         }
285
286         /* FIXME khubd hub requests should manage power switching */
287         omap_ohci_transceiver_power(1);
288
289         /* board init will have already handled HMC and mux setup.
290          * any external transceiver should already be initialized
291          * too, so all configured ports use the right signaling now.
292          */
293
294         return 0;
295 }
296
297 /*-------------------------------------------------------------------------*/
298
299 /**
300  * usb_hcd_omap_probe - initialize OMAP-based HCDs
301  * Context: !in_interrupt()
302  *
303  * Allocates basic resources for this USB host controller, and
304  * then invokes the start() method for the HCD associated with it
305  * through the hotplug entry's driver_data.
306  */
307 static int usb_hcd_omap_probe (const struct hc_driver *driver,
308                           struct platform_device *pdev)
309 {
310         int retval, irq;
311         struct usb_hcd *hcd = 0;
312
313         if (pdev->num_resources != 2) {
314                 dev_err(&pdev->dev, "invalid num_resources: %i\n",
315                        pdev->num_resources);
316                 return -ENODEV;
317         }
318
319         if (pdev->resource[0].flags != IORESOURCE_MEM
320                         || pdev->resource[1].flags != IORESOURCE_IRQ) {
321                 dev_err(&pdev->dev, "invalid resource type\n");
322                 return -ENODEV;
323         }
324
325         usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
326         if (IS_ERR(usb_host_ck))
327                 return PTR_ERR(usb_host_ck);
328
329         if (!cpu_is_omap15xx())
330                 usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
331         else
332                 usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
333
334         if (IS_ERR(usb_dc_ck)) {
335                 clk_put(usb_host_ck);
336                 return PTR_ERR(usb_dc_ck);
337         }
338
339
340         hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
341         if (!hcd) {
342                 retval = -ENOMEM;
343                 goto err0;
344         }
345         hcd->rsrc_start = pdev->resource[0].start;
346         hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
347
348         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
349                 dev_dbg(&pdev->dev, "request_mem_region failed\n");
350                 retval = -EBUSY;
351                 goto err1;
352         }
353
354         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
355         if (!hcd->regs) {
356                 dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
357                 retval = -ENOMEM;
358                 goto err2;
359         }
360
361         irq = platform_get_irq(pdev, 0);
362         if (irq < 0) {
363                 retval = -ENXIO;
364                 goto err3;
365         }
366         retval = usb_add_hcd(hcd, irq, 0);
367         if (retval)
368                 goto err3;
369
370         device_wakeup_enable(hcd->self.controller);
371         return 0;
372 err3:
373         iounmap(hcd->regs);
374 err2:
375         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
376 err1:
377         usb_put_hcd(hcd);
378 err0:
379         clk_put(usb_dc_ck);
380         clk_put(usb_host_ck);
381         return retval;
382 }
383
384
385 /* may be called with controller, bus, and devices active */
386
387 /**
388  * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
389  * @dev: USB Host Controller being removed
390  * Context: !in_interrupt()
391  *
392  * Reverses the effect of usb_hcd_omap_probe(), first invoking
393  * the HCD's stop() method.  It is always called from a thread
394  * context, normally "rmmod", "apmd", or something similar.
395  */
396 static inline void
397 usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
398 {
399         dev_dbg(hcd->self.controller, "stopping USB Controller\n");
400         usb_remove_hcd(hcd);
401         omap_ohci_clock_power(0);
402         if (!IS_ERR_OR_NULL(hcd->phy)) {
403                 (void) otg_set_host(hcd->phy->otg, 0);
404                 usb_put_phy(hcd->phy);
405         }
406         if (machine_is_omap_osk())
407                 gpio_free(9);
408         iounmap(hcd->regs);
409         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
410         usb_put_hcd(hcd);
411         clk_put(usb_dc_ck);
412         clk_put(usb_host_ck);
413 }
414
415 /*-------------------------------------------------------------------------*/
416
417 static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
418 {
419         return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
420 }
421
422 static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
423 {
424         struct usb_hcd          *hcd = platform_get_drvdata(dev);
425
426         usb_hcd_omap_remove(hcd, dev);
427
428         return 0;
429 }
430
431 /*-------------------------------------------------------------------------*/
432
433 #ifdef  CONFIG_PM
434
435 static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
436 {
437         struct usb_hcd *hcd = platform_get_drvdata(pdev);
438         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
439         bool do_wakeup = device_may_wakeup(&pdev->dev);
440         int ret;
441
442         if (time_before(jiffies, ohci->next_statechange))
443                 msleep(5);
444         ohci->next_statechange = jiffies;
445
446         ret = ohci_suspend(hcd, do_wakeup);
447         if (ret)
448                 return ret;
449
450         omap_ohci_clock_power(0);
451         return ret;
452 }
453
454 static int ohci_omap_resume(struct platform_device *dev)
455 {
456         struct usb_hcd  *hcd = platform_get_drvdata(dev);
457         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
458
459         if (time_before(jiffies, ohci->next_statechange))
460                 msleep(5);
461         ohci->next_statechange = jiffies;
462
463         omap_ohci_clock_power(1);
464         ohci_resume(hcd, false);
465         return 0;
466 }
467
468 #endif
469
470 /*-------------------------------------------------------------------------*/
471
472 /*
473  * Driver definition to register with the OMAP bus
474  */
475 static struct platform_driver ohci_hcd_omap_driver = {
476         .probe          = ohci_hcd_omap_drv_probe,
477         .remove         = ohci_hcd_omap_drv_remove,
478         .shutdown       = usb_hcd_platform_shutdown,
479 #ifdef  CONFIG_PM
480         .suspend        = ohci_omap_suspend,
481         .resume         = ohci_omap_resume,
482 #endif
483         .driver         = {
484                 .owner  = THIS_MODULE,
485                 .name   = "ohci",
486         },
487 };
488
489 static const struct ohci_driver_overrides omap_overrides __initconst = {
490         .product_desc   = "OMAP OHCI",
491         .reset          = ohci_omap_reset
492 };
493
494 static int __init ohci_omap_init(void)
495 {
496         if (usb_disabled())
497                 return -ENODEV;
498
499         pr_info("%s: " DRIVER_DESC "\n", hcd_name);
500
501         ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
502         return platform_driver_register(&ohci_hcd_omap_driver);
503 }
504 module_init(ohci_omap_init);
505
506 static void __exit ohci_omap_cleanup(void)
507 {
508         platform_driver_unregister(&ohci_hcd_omap_driver);
509 }
510 module_exit(ohci_omap_cleanup);
511
512 MODULE_DESCRIPTION(DRIVER_DESC);
513 MODULE_ALIAS("platform:ohci");
514 MODULE_LICENSE("GPL");