Merge branch '83xx' into for_paulus
[linux-2.6] / arch / arm / plat-omap / usb.c
1 /*
2  * arch/arm/plat-omap/usb.c -- platform level USB initialization
3  *
4  * Copyright (C) 2004 Texas Instruments, Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  */
20
21 #undef  DEBUG
22
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/types.h>
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/platform_device.h>
29 #include <linux/usb_otg.h>
30
31 #include <asm/io.h>
32 #include <asm/irq.h>
33 #include <asm/system.h>
34 #include <asm/hardware.h>
35
36 #include <asm/arch/mux.h>
37 #include <asm/arch/usb.h>
38 #include <asm/arch/board.h>
39
40 /* These routines should handle the standard chip-specific modes
41  * for usb0/1/2 ports, covering basic mux and transceiver setup.
42  * Call omap_usb_init() once, from INIT_MACHINE().
43  *
44  * Some board-*.c files will need to set up additional mux options,
45  * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
46  */
47
48 /* TESTED ON:
49  *  - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
50  *  - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
51  *  - 5912 OSK UDC, with *nonstandard* A-to-A cable
52  *  - 1510 Innovator UDC with bundled usb0 cable
53  *  - 1510 Innovator OHCI with bundled usb1/usb2 cable
54  *  - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
55  *  - 1710 custom development board using alternate pin group
56  *  - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
57  */
58
59 /*-------------------------------------------------------------------------*/
60
61 #ifdef  CONFIG_ARCH_OMAP_OTG
62
63 static struct otg_transceiver *xceiv;
64
65 /**
66  * otg_get_transceiver - find the (single) OTG transceiver driver
67  *
68  * Returns the transceiver driver, after getting a refcount to it; or
69  * null if there is no such transceiver.  The caller is responsible for
70  * releasing that count.
71  */
72 struct otg_transceiver *otg_get_transceiver(void)
73 {
74         if (xceiv)
75                 get_device(xceiv->dev);
76         return xceiv;
77 }
78 EXPORT_SYMBOL(otg_get_transceiver);
79
80 int otg_set_transceiver(struct otg_transceiver *x)
81 {
82         if (xceiv && x)
83                 return -EBUSY;
84         xceiv = x;
85         return 0;
86 }
87 EXPORT_SYMBOL(otg_set_transceiver);
88
89 #endif
90
91 /*-------------------------------------------------------------------------*/
92
93 #if defined(CONFIG_ARCH_OMAP_OTG) || defined(CONFIG_ARCH_OMAP15XX)
94
95 static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
96 {
97         u32     syscon1 = 0;
98
99         if (nwires == 0) {
100                 if (!cpu_is_omap15xx()) {
101                         /* pulldown D+/D- */
102                         USB_TRANSCEIVER_CTRL_REG &= ~(3 << 1);
103                 }
104                 return 0;
105         }
106
107         if (is_device)
108                 omap_cfg_reg(W4_USB_PUEN);
109
110         /* internal transceiver */
111         if (nwires == 2) {
112                 // omap_cfg_reg(P9_USB_DP);
113                 // omap_cfg_reg(R8_USB_DM);
114
115                 if (cpu_is_omap15xx()) {
116                         /* This works on 1510-Innovator */
117                         return 0;
118                 }
119
120                 /* NOTES:
121                  *  - peripheral should configure VBUS detection!
122                  *  - only peripherals may use the internal D+/D- pulldowns
123                  *  - OTG support on this port not yet written
124                  */
125
126                 USB_TRANSCEIVER_CTRL_REG &= ~(7 << 4);
127                 if (!is_device)
128                         USB_TRANSCEIVER_CTRL_REG |= (3 << 1);
129
130                 return 3 << 16;
131         }
132
133         /* alternate pin config, external transceiver */
134         if (cpu_is_omap15xx()) {
135                 printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
136                 return 0;
137         }
138
139         omap_cfg_reg(V6_USB0_TXD);
140         omap_cfg_reg(W9_USB0_TXEN);
141         omap_cfg_reg(W5_USB0_SE0);
142
143         /* NOTE:  SPEED and SUSP aren't configured here */
144
145         if (nwires != 3)
146                 omap_cfg_reg(Y5_USB0_RCV);
147         if (nwires != 6)
148                 USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R;
149
150         switch (nwires) {
151         case 3:
152                 syscon1 = 2;
153                 break;
154         case 4:
155                 syscon1 = 1;
156                 break;
157         case 6:
158                 syscon1 = 3;
159                 omap_cfg_reg(AA9_USB0_VP);
160                 omap_cfg_reg(R9_USB0_VM);
161                 USB_TRANSCEIVER_CTRL_REG |= CONF_USB2_UNI_R;
162                 break;
163         default:
164                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
165                         0, nwires);
166         }
167         return syscon1 << 16;
168 }
169
170 static u32 __init omap_usb1_init(unsigned nwires)
171 {
172         u32     syscon1 = 0;
173
174         if (nwires != 6 && !cpu_is_omap15xx())
175                 USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB1_UNI_R;
176         if (nwires == 0)
177                 return 0;
178
179         /* external transceiver */
180         omap_cfg_reg(USB1_TXD);
181         omap_cfg_reg(USB1_TXEN);
182         if (cpu_is_omap15xx()) {
183                 omap_cfg_reg(USB1_SEO);
184                 omap_cfg_reg(USB1_SPEED);
185                 // SUSP
186         } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
187                 omap_cfg_reg(W13_1610_USB1_SE0);
188                 omap_cfg_reg(R13_1610_USB1_SPEED);
189                 // SUSP
190         } else if (cpu_is_omap1710()) {
191                 omap_cfg_reg(R13_1710_USB1_SE0);
192                 // SUSP
193         } else {
194                 pr_debug("usb unrecognized\n");
195         }
196         if (nwires != 3)
197                 omap_cfg_reg(USB1_RCV);
198
199         switch (nwires) {
200         case 3:
201                 syscon1 = 2;
202                 break;
203         case 4:
204                 syscon1 = 1;
205                 break;
206         case 6:
207                 syscon1 = 3;
208                 omap_cfg_reg(USB1_VP);
209                 omap_cfg_reg(USB1_VM);
210                 if (!cpu_is_omap15xx())
211                         USB_TRANSCEIVER_CTRL_REG |= CONF_USB1_UNI_R;
212                 break;
213         default:
214                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
215                         1, nwires);
216         }
217         return syscon1 << 20;
218 }
219
220 static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
221 {
222         u32     syscon1 = 0;
223
224         /* NOTE erratum: must leave USB2_UNI_R set if usb0 in use */
225         if (alt_pingroup || nwires == 0)
226                 return 0;
227         if (nwires != 6 && !cpu_is_omap15xx())
228                 USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R;
229
230         /* external transceiver */
231         if (cpu_is_omap15xx()) {
232                 omap_cfg_reg(USB2_TXD);
233                 omap_cfg_reg(USB2_TXEN);
234                 omap_cfg_reg(USB2_SEO);
235                 if (nwires != 3)
236                         omap_cfg_reg(USB2_RCV);
237                 /* there is no USB2_SPEED */
238         } else if (cpu_is_omap16xx()) {
239                 omap_cfg_reg(V6_USB2_TXD);
240                 omap_cfg_reg(W9_USB2_TXEN);
241                 omap_cfg_reg(W5_USB2_SE0);
242                 if (nwires != 3)
243                         omap_cfg_reg(Y5_USB2_RCV);
244                 // FIXME omap_cfg_reg(USB2_SPEED);
245         } else {
246                 pr_debug("usb unrecognized\n");
247         }
248         // omap_cfg_reg(USB2_SUSP);
249
250         switch (nwires) {
251         case 3:
252                 syscon1 = 2;
253                 break;
254         case 4:
255                 syscon1 = 1;
256                 break;
257         case 6:
258                 syscon1 = 3;
259                 if (cpu_is_omap15xx()) {
260                         omap_cfg_reg(USB2_VP);
261                         omap_cfg_reg(USB2_VM);
262                 } else {
263                         omap_cfg_reg(AA9_USB2_VP);
264                         omap_cfg_reg(R9_USB2_VM);
265                         USB_TRANSCEIVER_CTRL_REG |= CONF_USB2_UNI_R;
266                 }
267                 break;
268         default:
269                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
270                         2, nwires);
271         }
272         return syscon1 << 24;
273 }
274
275 #endif
276
277 /*-------------------------------------------------------------------------*/
278
279 #if     defined(CONFIG_USB_GADGET_OMAP) || \
280         defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) || \
281         (defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG))
282 static void usb_release(struct device *dev)
283 {
284         /* normally not freed */
285 }
286 #endif
287
288 #ifdef  CONFIG_USB_GADGET_OMAP
289
290 static struct resource udc_resources[] = {
291         /* order is significant! */
292         {               /* registers */
293                 .start          = UDC_BASE,
294                 .end            = UDC_BASE + 0xff,
295                 .flags          = IORESOURCE_MEM,
296         }, {            /* general IRQ */
297                 .start          = IH2_BASE + 20,
298                 .flags          = IORESOURCE_IRQ,
299         }, {            /* PIO IRQ */
300                 .start          = IH2_BASE + 30,
301                 .flags          = IORESOURCE_IRQ,
302         }, {            /* SOF IRQ */
303                 .start          = IH2_BASE + 29,
304                 .flags          = IORESOURCE_IRQ,
305         },
306 };
307
308 static u64 udc_dmamask = ~(u32)0;
309
310 static struct platform_device udc_device = {
311         .name           = "omap_udc",
312         .id             = -1,
313         .dev = {
314                 .release                = usb_release,
315                 .dma_mask               = &udc_dmamask,
316                 .coherent_dma_mask      = 0xffffffff,
317         },
318         .num_resources  = ARRAY_SIZE(udc_resources),
319         .resource       = udc_resources,
320 };
321
322 #endif
323
324 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
325
326 /* The dmamask must be set for OHCI to work */
327 static u64 ohci_dmamask = ~(u32)0;
328
329 static struct resource ohci_resources[] = {
330         {
331                 .start  = OMAP_OHCI_BASE,
332                 .end    = OMAP_OHCI_BASE + 4096 - 1,
333                 .flags  = IORESOURCE_MEM,
334         },
335         {
336                 .start  = INT_USB_HHC_1,
337                 .flags  = IORESOURCE_IRQ,
338         },
339 };
340
341 static struct platform_device ohci_device = {
342         .name                   = "ohci",
343         .id                     = -1,
344         .dev = {
345                 .release                = usb_release,
346                 .dma_mask               = &ohci_dmamask,
347                 .coherent_dma_mask      = 0xffffffff,
348         },
349         .num_resources  = ARRAY_SIZE(ohci_resources),
350         .resource               = ohci_resources,
351 };
352
353 #endif
354
355 #if     defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
356
357 static struct resource otg_resources[] = {
358         /* order is significant! */
359         {
360                 .start          = OTG_BASE,
361                 .end            = OTG_BASE + 0xff,
362                 .flags          = IORESOURCE_MEM,
363         }, {
364                 .start          = IH2_BASE + 8,
365                 .flags          = IORESOURCE_IRQ,
366         },
367 };
368
369 static struct platform_device otg_device = {
370         .name           = "omap_otg",
371         .id             = -1,
372         .dev = {
373                 .release                = usb_release,
374         },
375         .num_resources  = ARRAY_SIZE(otg_resources),
376         .resource       = otg_resources,
377 };
378
379 #endif
380
381 /*-------------------------------------------------------------------------*/
382
383 #define ULPD_CLOCK_CTRL_REG     __REG16(ULPD_CLOCK_CTRL)
384 #define ULPD_SOFT_REQ_REG       __REG16(ULPD_SOFT_REQ)
385
386
387 // FIXME correct answer depends on hmc_mode,
388 // as does any nonzero value for config->otg port number
389 #ifdef  CONFIG_USB_GADGET_OMAP
390 #define is_usb0_device(config)  1
391 #else
392 #define is_usb0_device(config)  0
393 #endif
394
395 /*-------------------------------------------------------------------------*/
396
397 #ifdef  CONFIG_ARCH_OMAP_OTG
398
399 void __init
400 omap_otg_init(struct omap_usb_config *config)
401 {
402         u32             syscon = OTG_SYSCON_1_REG & 0xffff;
403         int             status;
404         int             alt_pingroup = 0;
405
406         /* NOTE:  no bus or clock setup (yet?) */
407
408         syscon = OTG_SYSCON_1_REG & 0xffff;
409         if (!(syscon & OTG_RESET_DONE))
410                 pr_debug("USB resets not complete?\n");
411
412         // OTG_IRQ_EN_REG = 0;
413
414         /* pin muxing and transceiver pinouts */
415         if (config->pins[0] > 2)        /* alt pingroup 2 */
416                 alt_pingroup = 1;
417         syscon |= omap_usb0_init(config->pins[0], is_usb0_device(config));
418         syscon |= omap_usb1_init(config->pins[1]);
419         syscon |= omap_usb2_init(config->pins[2], alt_pingroup);
420         pr_debug("OTG_SYSCON_1_REG = %08x\n", syscon);
421         OTG_SYSCON_1_REG = syscon;
422
423         syscon = config->hmc_mode;
424         syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
425 #ifdef  CONFIG_USB_OTG
426         if (config->otg)
427                 syscon |= OTG_EN;
428 #endif
429         pr_debug("USB_TRANSCEIVER_CTRL_REG = %03x\n", USB_TRANSCEIVER_CTRL_REG);
430         pr_debug("OTG_SYSCON_2_REG = %08x\n", syscon);
431         OTG_SYSCON_2_REG = syscon;
432
433         printk("USB: hmc %d", config->hmc_mode);
434         if (alt_pingroup)
435                 printk(", usb2 alt %d wires", config->pins[2]);
436         else if (config->pins[0])
437                 printk(", usb0 %d wires%s", config->pins[0],
438                         is_usb0_device(config) ? " (dev)" : "");
439         if (config->pins[1])
440                 printk(", usb1 %d wires", config->pins[1]);
441         if (!alt_pingroup && config->pins[2])
442                 printk(", usb2 %d wires", config->pins[2]);
443         if (config->otg)
444                 printk(", Mini-AB on usb%d", config->otg - 1);
445         printk("\n");
446
447         /* leave USB clocks/controllers off until needed */
448         ULPD_SOFT_REQ_REG &= ~SOFT_USB_CLK_REQ;
449         ULPD_CLOCK_CTRL_REG &= ~USB_MCLK_EN;
450         ULPD_CLOCK_CTRL_REG |= DIS_USB_PVCI_CLK;
451         syscon = OTG_SYSCON_1_REG;
452         syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
453
454 #ifdef  CONFIG_USB_GADGET_OMAP
455         if (config->otg || config->register_dev) {
456                 syscon &= ~DEV_IDLE_EN;
457                 udc_device.dev.platform_data = config;
458                 /* FIXME patch IRQ numbers for omap730 */
459                 status = platform_device_register(&udc_device);
460                 if (status)
461                         pr_debug("can't register UDC device, %d\n", status);
462         }
463 #endif
464
465 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
466         if (config->otg || config->register_host) {
467                 syscon &= ~HST_IDLE_EN;
468                 ohci_device.dev.platform_data = config;
469                 if (cpu_is_omap730())
470                         ohci_resources[1].start = INT_730_USB_HHC_1;
471                 status = platform_device_register(&ohci_device);
472                 if (status)
473                         pr_debug("can't register OHCI device, %d\n", status);
474         }
475 #endif
476
477 #ifdef  CONFIG_USB_OTG
478         if (config->otg) {
479                 syscon &= ~OTG_IDLE_EN;
480                 otg_device.dev.platform_data = config;
481                 if (cpu_is_omap730())
482                         otg_resources[1].start = INT_730_USB_OTG;
483                 status = platform_device_register(&otg_device);
484                 if (status)
485                         pr_debug("can't register OTG device, %d\n", status);
486         }
487 #endif
488         pr_debug("OTG_SYSCON_1_REG = %08x\n", syscon);
489         OTG_SYSCON_1_REG = syscon;
490
491         status = 0;
492 }
493
494 #else
495 static inline void omap_otg_init(struct omap_usb_config *config) {}
496 #endif
497
498 /*-------------------------------------------------------------------------*/
499
500 #ifdef  CONFIG_ARCH_OMAP15XX
501
502 #define ULPD_DPLL_CTRL_REG      __REG16(ULPD_DPLL_CTRL)
503 #define DPLL_IOB                (1 << 13)
504 #define DPLL_PLL_ENABLE         (1 << 4)
505 #define DPLL_LOCK               (1 << 0)
506
507 #define ULPD_APLL_CTRL_REG      __REG16(ULPD_APLL_CTRL)
508 #define APLL_NDPLL_SWITCH       (1 << 0)
509
510
511 static void __init omap_1510_usb_init(struct omap_usb_config *config)
512 {
513         unsigned int val;
514
515         omap_usb0_init(config->pins[0], is_usb0_device(config));
516         omap_usb1_init(config->pins[1]);
517         omap_usb2_init(config->pins[2], 0);
518
519         val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
520         val |= (config->hmc_mode << 1);
521         omap_writel(val, MOD_CONF_CTRL_0);
522
523         printk("USB: hmc %d", config->hmc_mode);
524         if (config->pins[0])
525                 printk(", usb0 %d wires%s", config->pins[0],
526                         is_usb0_device(config) ? " (dev)" : "");
527         if (config->pins[1])
528                 printk(", usb1 %d wires", config->pins[1]);
529         if (config->pins[2])
530                 printk(", usb2 %d wires", config->pins[2]);
531         printk("\n");
532
533         /* use DPLL for 48 MHz function clock */
534         pr_debug("APLL %04x DPLL %04x REQ %04x\n", ULPD_APLL_CTRL_REG,
535                         ULPD_DPLL_CTRL_REG, ULPD_SOFT_REQ_REG);
536         ULPD_APLL_CTRL_REG &= ~APLL_NDPLL_SWITCH;
537         ULPD_DPLL_CTRL_REG |= DPLL_IOB | DPLL_PLL_ENABLE;
538         ULPD_SOFT_REQ_REG |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
539         while (!(ULPD_DPLL_CTRL_REG & DPLL_LOCK))
540                 cpu_relax();
541
542 #ifdef  CONFIG_USB_GADGET_OMAP
543         if (config->register_dev) {
544                 int status;
545
546                 udc_device.dev.platform_data = config;
547                 status = platform_device_register(&udc_device);
548                 if (status)
549                         pr_debug("can't register UDC device, %d\n", status);
550                 /* udc driver gates 48MHz by D+ pullup */
551         }
552 #endif
553
554 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
555         if (config->register_host) {
556                 int status;
557
558                 ohci_device.dev.platform_data = config;
559                 status = platform_device_register(&ohci_device);
560                 if (status)
561                         pr_debug("can't register OHCI device, %d\n", status);
562                 /* hcd explicitly gates 48MHz */
563         }
564 #endif
565 }
566
567 #else
568 static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
569 #endif
570
571 /*-------------------------------------------------------------------------*/
572
573 static struct omap_usb_config platform_data;
574
575 static int __init
576 omap_usb_init(void)
577 {
578         const struct omap_usb_config *config;
579
580         config = omap_get_config(OMAP_TAG_USB, struct omap_usb_config);
581         if (config == NULL) {
582                 printk(KERN_ERR "USB: No board-specific "
583                                 "platform config found\n");
584                 return -ENODEV;
585         }
586         platform_data = *config;
587
588         if (cpu_is_omap730() || cpu_is_omap16xx())
589                 omap_otg_init(&platform_data);
590         else if (cpu_is_omap15xx())
591                 omap_1510_usb_init(&platform_data);
592         else {
593                 printk(KERN_ERR "USB: No init for your chip yet\n");
594                 return -ENODEV;
595         }
596         return 0;
597 }
598
599 subsys_initcall(omap_usb_init);