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 #include <linux/io.h>
31
32 #include <asm/irq.h>
33 #include <asm/system.h>
34 #include <mach/hardware.h>
35
36 #include <mach/control.h>
37 #include <mach/mux.h>
38 #include <mach/usb.h>
39 #include <mach/board.h>
40
41 #ifdef CONFIG_ARCH_OMAP1
42
43 #define INT_USB_IRQ_GEN IH2_BASE + 20
44 #define INT_USB_IRQ_NISO IH2_BASE + 30
45 #define INT_USB_IRQ_ISO IH2_BASE + 29
46 #define INT_USB_IRQ_HGEN INT_USB_HHC_1
47 #define INT_USB_IRQ_OTG IH2_BASE + 8
48
49 #else
50
51 #define INT_USB_IRQ_GEN INT_24XX_USB_IRQ_GEN
52 #define INT_USB_IRQ_NISO INT_24XX_USB_IRQ_NISO
53 #define INT_USB_IRQ_ISO INT_24XX_USB_IRQ_ISO
54 #define INT_USB_IRQ_HGEN INT_24XX_USB_IRQ_HGEN
55 #define INT_USB_IRQ_OTG INT_24XX_USB_IRQ_OTG
56
57 #endif
58
59
60 /* These routines should handle the standard chip-specific modes
61 * for usb0/1/2 ports, covering basic mux and transceiver setup.
62 *
63 * Some board-*.c files will need to set up additional mux options,
64 * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
65 */
66
67 /* TESTED ON:
68 * - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
69 * - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
70 * - 5912 OSK UDC, with *nonstandard* A-to-A cable
71 * - 1510 Innovator UDC with bundled usb0 cable
72 * - 1510 Innovator OHCI with bundled usb1/usb2 cable
73 * - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
74 * - 1710 custom development board using alternate pin group
75 * - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
76 */
77
78 /*-------------------------------------------------------------------------*/
79
80 #if defined(CONFIG_ARCH_OMAP_OTG) || defined(CONFIG_ARCH_OMAP15XX)
81
omap2_usb_devconf_clear(u8 port,u32 mask)82 static void omap2_usb_devconf_clear(u8 port, u32 mask)
83 {
84 u32 r;
85
86 r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
87 r &= ~USBTXWRMODEI(port, mask);
88 omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
89 }
90
omap2_usb_devconf_set(u8 port,u32 mask)91 static void omap2_usb_devconf_set(u8 port, u32 mask)
92 {
93 u32 r;
94
95 r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
96 r |= USBTXWRMODEI(port, mask);
97 omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
98 }
99
omap2_usb2_disable_5pinbitll(void)100 static void omap2_usb2_disable_5pinbitll(void)
101 {
102 u32 r;
103
104 r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
105 r &= ~(USBTXWRMODEI(2, USB_BIDIR_TLL) | USBT2TLL5PI);
106 omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
107 }
108
omap2_usb2_enable_5pinunitll(void)109 static void omap2_usb2_enable_5pinunitll(void)
110 {
111 u32 r;
112
113 r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
114 r |= USBTXWRMODEI(2, USB_UNIDIR_TLL) | USBT2TLL5PI;
115 omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
116 }
117
omap_usb0_init(unsigned nwires,unsigned is_device)118 static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
119 {
120 u32 syscon1 = 0;
121
122 if (cpu_is_omap24xx())
123 omap2_usb_devconf_clear(0, USB_BIDIR_TLL);
124
125 if (nwires == 0) {
126 if (cpu_class_is_omap1() && !cpu_is_omap15xx()) {
127 u32 l;
128
129 /* pulldown D+/D- */
130 l = omap_readl(USB_TRANSCEIVER_CTRL);
131 l &= ~(3 << 1);
132 omap_writel(l, USB_TRANSCEIVER_CTRL);
133 }
134 return 0;
135 }
136
137 if (is_device) {
138 if (cpu_is_omap24xx())
139 omap_cfg_reg(J20_24XX_USB0_PUEN);
140 else
141 omap_cfg_reg(W4_USB_PUEN);
142 }
143
144 /* internal transceiver (unavailable on 17xx, 24xx) */
145 if (!cpu_class_is_omap2() && nwires == 2) {
146 u32 l;
147
148 // omap_cfg_reg(P9_USB_DP);
149 // omap_cfg_reg(R8_USB_DM);
150
151 if (cpu_is_omap15xx()) {
152 /* This works on 1510-Innovator */
153 return 0;
154 }
155
156 /* NOTES:
157 * - peripheral should configure VBUS detection!
158 * - only peripherals may use the internal D+/D- pulldowns
159 * - OTG support on this port not yet written
160 */
161
162 l = omap_readl(USB_TRANSCEIVER_CTRL);
163 l &= ~(7 << 4);
164 if (!is_device)
165 l |= (3 << 1);
166 omap_writel(l, USB_TRANSCEIVER_CTRL);
167
168 return 3 << 16;
169 }
170
171 /* alternate pin config, external transceiver */
172 if (cpu_is_omap15xx()) {
173 printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
174 return 0;
175 }
176
177 if (cpu_is_omap24xx()) {
178 omap_cfg_reg(K18_24XX_USB0_DAT);
179 omap_cfg_reg(K19_24XX_USB0_TXEN);
180 omap_cfg_reg(J14_24XX_USB0_SE0);
181 if (nwires != 3)
182 omap_cfg_reg(J18_24XX_USB0_RCV);
183 } else {
184 omap_cfg_reg(V6_USB0_TXD);
185 omap_cfg_reg(W9_USB0_TXEN);
186 omap_cfg_reg(W5_USB0_SE0);
187 if (nwires != 3)
188 omap_cfg_reg(Y5_USB0_RCV);
189 }
190
191 /* NOTE: SPEED and SUSP aren't configured here. OTG hosts
192 * may be able to use I2C requests to set those bits along
193 * with VBUS switching and overcurrent detection.
194 */
195
196 if (cpu_class_is_omap1() && nwires != 6) {
197 u32 l;
198
199 l = omap_readl(USB_TRANSCEIVER_CTRL);
200 l &= ~CONF_USB2_UNI_R;
201 omap_writel(l, USB_TRANSCEIVER_CTRL);
202 }
203
204 switch (nwires) {
205 case 3:
206 syscon1 = 2;
207 if (cpu_is_omap24xx())
208 omap2_usb_devconf_set(0, USB_BIDIR);
209 break;
210 case 4:
211 syscon1 = 1;
212 if (cpu_is_omap24xx())
213 omap2_usb_devconf_set(0, USB_BIDIR);
214 break;
215 case 6:
216 syscon1 = 3;
217 if (cpu_is_omap24xx()) {
218 omap_cfg_reg(J19_24XX_USB0_VP);
219 omap_cfg_reg(K20_24XX_USB0_VM);
220 omap2_usb_devconf_set(0, USB_UNIDIR);
221 } else {
222 u32 l;
223
224 omap_cfg_reg(AA9_USB0_VP);
225 omap_cfg_reg(R9_USB0_VM);
226 l = omap_readl(USB_TRANSCEIVER_CTRL);
227 l |= CONF_USB2_UNI_R;
228 omap_writel(l, USB_TRANSCEIVER_CTRL);
229 }
230 break;
231 default:
232 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
233 0, nwires);
234 }
235 return syscon1 << 16;
236 }
237
omap_usb1_init(unsigned nwires)238 static u32 __init omap_usb1_init(unsigned nwires)
239 {
240 u32 syscon1 = 0;
241
242 if (cpu_class_is_omap1() && !cpu_is_omap15xx() && nwires != 6) {
243 u32 l;
244
245 l = omap_readl(USB_TRANSCEIVER_CTRL);
246 l &= ~CONF_USB1_UNI_R;
247 omap_writel(l, USB_TRANSCEIVER_CTRL);
248 }
249 if (cpu_is_omap24xx())
250 omap2_usb_devconf_clear(1, USB_BIDIR_TLL);
251
252 if (nwires == 0)
253 return 0;
254
255 /* external transceiver */
256 if (cpu_class_is_omap1()) {
257 omap_cfg_reg(USB1_TXD);
258 omap_cfg_reg(USB1_TXEN);
259 if (nwires != 3)
260 omap_cfg_reg(USB1_RCV);
261 }
262
263 if (cpu_is_omap15xx()) {
264 omap_cfg_reg(USB1_SEO);
265 omap_cfg_reg(USB1_SPEED);
266 // SUSP
267 } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
268 omap_cfg_reg(W13_1610_USB1_SE0);
269 omap_cfg_reg(R13_1610_USB1_SPEED);
270 // SUSP
271 } else if (cpu_is_omap1710()) {
272 omap_cfg_reg(R13_1710_USB1_SE0);
273 // SUSP
274 } else if (cpu_is_omap24xx()) {
275 /* NOTE: board-specific code must set up pin muxing for usb1,
276 * since each signal could come out on either of two balls.
277 */
278 } else {
279 pr_debug("usb%d cpu unrecognized\n", 1);
280 return 0;
281 }
282
283 switch (nwires) {
284 case 2:
285 if (!cpu_is_omap24xx())
286 goto bad;
287 /* NOTE: board-specific code must override this setting if
288 * this TLL link is not using DP/DM
289 */
290 syscon1 = 1;
291 omap2_usb_devconf_set(1, USB_BIDIR_TLL);
292 break;
293 case 3:
294 syscon1 = 2;
295 if (cpu_is_omap24xx())
296 omap2_usb_devconf_set(1, USB_BIDIR);
297 break;
298 case 4:
299 syscon1 = 1;
300 if (cpu_is_omap24xx())
301 omap2_usb_devconf_set(1, USB_BIDIR);
302 break;
303 case 6:
304 if (cpu_is_omap24xx())
305 goto bad;
306 syscon1 = 3;
307 omap_cfg_reg(USB1_VP);
308 omap_cfg_reg(USB1_VM);
309 if (!cpu_is_omap15xx()) {
310 u32 l;
311
312 l = omap_readl(USB_TRANSCEIVER_CTRL);
313 l |= CONF_USB1_UNI_R;
314 omap_writel(l, USB_TRANSCEIVER_CTRL);
315 }
316 break;
317 default:
318 bad:
319 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
320 1, nwires);
321 }
322 return syscon1 << 20;
323 }
324
omap_usb2_init(unsigned nwires,unsigned alt_pingroup)325 static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
326 {
327 u32 syscon1 = 0;
328
329 if (cpu_is_omap24xx()) {
330 omap2_usb2_disable_5pinbitll();
331 alt_pingroup = 0;
332 }
333
334 /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
335 if (alt_pingroup || nwires == 0)
336 return 0;
337
338 if (cpu_class_is_omap1() && !cpu_is_omap15xx() && nwires != 6) {
339 u32 l;
340
341 l = omap_readl(USB_TRANSCEIVER_CTRL);
342 l &= ~CONF_USB2_UNI_R;
343 omap_writel(l, USB_TRANSCEIVER_CTRL);
344 }
345
346 /* external transceiver */
347 if (cpu_is_omap15xx()) {
348 omap_cfg_reg(USB2_TXD);
349 omap_cfg_reg(USB2_TXEN);
350 omap_cfg_reg(USB2_SEO);
351 if (nwires != 3)
352 omap_cfg_reg(USB2_RCV);
353 /* there is no USB2_SPEED */
354 } else if (cpu_is_omap16xx()) {
355 omap_cfg_reg(V6_USB2_TXD);
356 omap_cfg_reg(W9_USB2_TXEN);
357 omap_cfg_reg(W5_USB2_SE0);
358 if (nwires != 3)
359 omap_cfg_reg(Y5_USB2_RCV);
360 // FIXME omap_cfg_reg(USB2_SPEED);
361 } else if (cpu_is_omap24xx()) {
362 omap_cfg_reg(Y11_24XX_USB2_DAT);
363 omap_cfg_reg(AA10_24XX_USB2_SE0);
364 if (nwires > 2)
365 omap_cfg_reg(AA12_24XX_USB2_TXEN);
366 if (nwires > 3)
367 omap_cfg_reg(AA6_24XX_USB2_RCV);
368 } else {
369 pr_debug("usb%d cpu unrecognized\n", 1);
370 return 0;
371 }
372 // if (cpu_class_is_omap1()) omap_cfg_reg(USB2_SUSP);
373
374 switch (nwires) {
375 case 2:
376 if (!cpu_is_omap24xx())
377 goto bad;
378 /* NOTE: board-specific code must override this setting if
379 * this TLL link is not using DP/DM
380 */
381 syscon1 = 1;
382 omap2_usb_devconf_set(2, USB_BIDIR_TLL);
383 break;
384 case 3:
385 syscon1 = 2;
386 if (cpu_is_omap24xx())
387 omap2_usb_devconf_set(2, USB_BIDIR);
388 break;
389 case 4:
390 syscon1 = 1;
391 if (cpu_is_omap24xx())
392 omap2_usb_devconf_set(2, USB_BIDIR);
393 break;
394 case 5:
395 if (!cpu_is_omap24xx())
396 goto bad;
397 omap_cfg_reg(AA4_24XX_USB2_TLLSE0);
398 /* NOTE: board-specific code must override this setting if
399 * this TLL link is not using DP/DM. Something must also
400 * set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED}
401 */
402 syscon1 = 3;
403 omap2_usb2_enable_5pinunitll();
404 break;
405 case 6:
406 if (cpu_is_omap24xx())
407 goto bad;
408 syscon1 = 3;
409 if (cpu_is_omap15xx()) {
410 omap_cfg_reg(USB2_VP);
411 omap_cfg_reg(USB2_VM);
412 } else {
413 u32 l;
414
415 omap_cfg_reg(AA9_USB2_VP);
416 omap_cfg_reg(R9_USB2_VM);
417 l = omap_readl(USB_TRANSCEIVER_CTRL);
418 l |= CONF_USB2_UNI_R;
419 omap_writel(l, USB_TRANSCEIVER_CTRL);
420 }
421 break;
422 default:
423 bad:
424 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
425 2, nwires);
426 }
427 return syscon1 << 24;
428 }
429
430 #endif
431
432 /*-------------------------------------------------------------------------*/
433
434 #ifdef CONFIG_USB_GADGET_OMAP
435
436 static struct resource udc_resources[] = {
437 /* order is significant! */
438 { /* registers */
439 .start = UDC_BASE,
440 .end = UDC_BASE + 0xff,
441 .flags = IORESOURCE_MEM,
442 }, { /* general IRQ */
443 .start = INT_USB_IRQ_GEN,
444 .flags = IORESOURCE_IRQ,
445 }, { /* PIO IRQ */
446 .start = INT_USB_IRQ_NISO,
447 .flags = IORESOURCE_IRQ,
448 }, { /* SOF IRQ */
449 .start = INT_USB_IRQ_ISO,
450 .flags = IORESOURCE_IRQ,
451 },
452 };
453
454 static u64 udc_dmamask = ~(u32)0;
455
456 static struct platform_device udc_device = {
457 .name = "omap_udc",
458 .id = -1,
459 .dev = {
460 .dma_mask = &udc_dmamask,
461 .coherent_dma_mask = 0xffffffff,
462 },
463 .num_resources = ARRAY_SIZE(udc_resources),
464 .resource = udc_resources,
465 };
466
467 #endif
468
469 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
470
471 /* The dmamask must be set for OHCI to work */
472 static u64 ohci_dmamask = ~(u32)0;
473
474 static struct resource ohci_resources[] = {
475 {
476 .start = OMAP_OHCI_BASE,
477 .end = OMAP_OHCI_BASE + 0xff,
478 .flags = IORESOURCE_MEM,
479 },
480 {
481 .start = INT_USB_IRQ_HGEN,
482 .flags = IORESOURCE_IRQ,
483 },
484 };
485
486 static struct platform_device ohci_device = {
487 .name = "ohci",
488 .id = -1,
489 .dev = {
490 .dma_mask = &ohci_dmamask,
491 .coherent_dma_mask = 0xffffffff,
492 },
493 .num_resources = ARRAY_SIZE(ohci_resources),
494 .resource = ohci_resources,
495 };
496
497 #endif
498
499 #if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
500
501 static struct resource otg_resources[] = {
502 /* order is significant! */
503 {
504 .start = OTG_BASE,
505 .end = OTG_BASE + 0xff,
506 .flags = IORESOURCE_MEM,
507 }, {
508 .start = INT_USB_IRQ_OTG,
509 .flags = IORESOURCE_IRQ,
510 },
511 };
512
513 static struct platform_device otg_device = {
514 .name = "omap_otg",
515 .id = -1,
516 .num_resources = ARRAY_SIZE(otg_resources),
517 .resource = otg_resources,
518 };
519
520 #endif
521
522 /*-------------------------------------------------------------------------*/
523
524 // FIXME correct answer depends on hmc_mode,
525 // as does (on omap1) any nonzero value for config->otg port number
526 #ifdef CONFIG_USB_GADGET_OMAP
527 #define is_usb0_device(config) 1
528 #else
529 #define is_usb0_device(config) 0
530 #endif
531
532 /*-------------------------------------------------------------------------*/
533
534 #ifdef CONFIG_ARCH_OMAP_OTG
535
536 void __init
omap_otg_init(struct omap_usb_config * config)537 omap_otg_init(struct omap_usb_config *config)
538 {
539 u32 syscon;
540 int status;
541 int alt_pingroup = 0;
542
543 /* NOTE: no bus or clock setup (yet?) */
544
545 syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
546 if (!(syscon & OTG_RESET_DONE))
547 pr_debug("USB resets not complete?\n");
548
549 //omap_writew(0, OTG_IRQ_EN);
550
551 /* pin muxing and transceiver pinouts */
552 if (config->pins[0] > 2) /* alt pingroup 2 */
553 alt_pingroup = 1;
554 syscon |= omap_usb0_init(config->pins[0], is_usb0_device(config));
555 syscon |= omap_usb1_init(config->pins[1]);
556 syscon |= omap_usb2_init(config->pins[2], alt_pingroup);
557 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
558 omap_writel(syscon, OTG_SYSCON_1);
559
560 syscon = config->hmc_mode;
561 syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
562 #ifdef CONFIG_USB_OTG
563 if (config->otg)
564 syscon |= OTG_EN;
565 #endif
566 if (cpu_class_is_omap1())
567 pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
568 omap_readl(USB_TRANSCEIVER_CTRL));
569 pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2));
570 omap_writel(syscon, OTG_SYSCON_2);
571
572 printk("USB: hmc %d", config->hmc_mode);
573 if (!alt_pingroup)
574 printk(", usb2 alt %d wires", config->pins[2]);
575 else if (config->pins[0])
576 printk(", usb0 %d wires%s", config->pins[0],
577 is_usb0_device(config) ? " (dev)" : "");
578 if (config->pins[1])
579 printk(", usb1 %d wires", config->pins[1]);
580 if (!alt_pingroup && config->pins[2])
581 printk(", usb2 %d wires", config->pins[2]);
582 if (config->otg)
583 printk(", Mini-AB on usb%d", config->otg - 1);
584 printk("\n");
585
586 if (cpu_class_is_omap1()) {
587 u16 w;
588
589 /* leave USB clocks/controllers off until needed */
590 w = omap_readw(ULPD_SOFT_REQ);
591 w &= ~SOFT_USB_CLK_REQ;
592 omap_writew(w, ULPD_SOFT_REQ);
593
594 w = omap_readw(ULPD_CLOCK_CTRL);
595 w &= ~USB_MCLK_EN;
596 w |= DIS_USB_PVCI_CLK;
597 omap_writew(w, ULPD_CLOCK_CTRL);
598 }
599 syscon = omap_readl(OTG_SYSCON_1);
600 syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
601
602 #ifdef CONFIG_USB_GADGET_OMAP
603 if (config->otg || config->register_dev) {
604 syscon &= ~DEV_IDLE_EN;
605 udc_device.dev.platform_data = config;
606 /* FIXME patch IRQ numbers for omap730 */
607 status = platform_device_register(&udc_device);
608 if (status)
609 pr_debug("can't register UDC device, %d\n", status);
610 }
611 #endif
612
613 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
614 if (config->otg || config->register_host) {
615 syscon &= ~HST_IDLE_EN;
616 ohci_device.dev.platform_data = config;
617 if (cpu_is_omap730())
618 ohci_resources[1].start = INT_730_USB_HHC_1;
619 status = platform_device_register(&ohci_device);
620 if (status)
621 pr_debug("can't register OHCI device, %d\n", status);
622 }
623 #endif
624
625 #ifdef CONFIG_USB_OTG
626 if (config->otg) {
627 syscon &= ~OTG_IDLE_EN;
628 otg_device.dev.platform_data = config;
629 if (cpu_is_omap730())
630 otg_resources[1].start = INT_730_USB_OTG;
631 status = platform_device_register(&otg_device);
632 if (status)
633 pr_debug("can't register OTG device, %d\n", status);
634 }
635 #endif
636 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
637 omap_writel(syscon, OTG_SYSCON_1);
638
639 status = 0;
640 }
641
642 #else
omap_otg_init(struct omap_usb_config * config)643 static inline void omap_otg_init(struct omap_usb_config *config) {}
644 #endif
645
646 /*-------------------------------------------------------------------------*/
647
648 #ifdef CONFIG_ARCH_OMAP15XX
649
650 /* ULPD_DPLL_CTRL */
651 #define DPLL_IOB (1 << 13)
652 #define DPLL_PLL_ENABLE (1 << 4)
653 #define DPLL_LOCK (1 << 0)
654
655 /* ULPD_APLL_CTRL */
656 #define APLL_NDPLL_SWITCH (1 << 0)
657
658
omap_1510_usb_init(struct omap_usb_config * config)659 static void __init omap_1510_usb_init(struct omap_usb_config *config)
660 {
661 unsigned int val;
662 u16 w;
663
664 omap_usb0_init(config->pins[0], is_usb0_device(config));
665 omap_usb1_init(config->pins[1]);
666 omap_usb2_init(config->pins[2], 0);
667
668 val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
669 val |= (config->hmc_mode << 1);
670 omap_writel(val, MOD_CONF_CTRL_0);
671
672 printk("USB: hmc %d", config->hmc_mode);
673 if (config->pins[0])
674 printk(", usb0 %d wires%s", config->pins[0],
675 is_usb0_device(config) ? " (dev)" : "");
676 if (config->pins[1])
677 printk(", usb1 %d wires", config->pins[1]);
678 if (config->pins[2])
679 printk(", usb2 %d wires", config->pins[2]);
680 printk("\n");
681
682 /* use DPLL for 48 MHz function clock */
683 pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL),
684 omap_readw(ULPD_DPLL_CTRL), omap_readw(ULPD_SOFT_REQ));
685
686 w = omap_readw(ULPD_APLL_CTRL);
687 w &= ~APLL_NDPLL_SWITCH;
688 omap_writew(w, ULPD_APLL_CTRL);
689
690 w = omap_readw(ULPD_DPLL_CTRL);
691 w |= DPLL_IOB | DPLL_PLL_ENABLE;
692 omap_writew(w, ULPD_DPLL_CTRL);
693
694 w = omap_readw(ULPD_SOFT_REQ);
695 w |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
696 omap_writew(w, ULPD_SOFT_REQ);
697
698 while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
699 cpu_relax();
700
701 #ifdef CONFIG_USB_GADGET_OMAP
702 if (config->register_dev) {
703 int status;
704
705 udc_device.dev.platform_data = config;
706 status = platform_device_register(&udc_device);
707 if (status)
708 pr_debug("can't register UDC device, %d\n", status);
709 /* udc driver gates 48MHz by D+ pullup */
710 }
711 #endif
712
713 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
714 if (config->register_host) {
715 int status;
716
717 ohci_device.dev.platform_data = config;
718 status = platform_device_register(&ohci_device);
719 if (status)
720 pr_debug("can't register OHCI device, %d\n", status);
721 /* hcd explicitly gates 48MHz */
722 }
723 #endif
724 }
725
726 #else
omap_1510_usb_init(struct omap_usb_config * config)727 static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
728 #endif
729
730 /*-------------------------------------------------------------------------*/
731
732 static struct omap_usb_config platform_data;
733
734 static int __init
omap_usb_init(void)735 omap_usb_init(void)
736 {
737 const struct omap_usb_config *config;
738
739 config = omap_get_config(OMAP_TAG_USB, struct omap_usb_config);
740 if (config == NULL) {
741 printk(KERN_ERR "USB: No board-specific "
742 "platform config found\n");
743 return -ENODEV;
744 }
745 platform_data = *config;
746
747 if (cpu_is_omap730() || cpu_is_omap16xx() || cpu_is_omap24xx())
748 omap_otg_init(&platform_data);
749 else if (cpu_is_omap15xx())
750 omap_1510_usb_init(&platform_data);
751 else {
752 printk(KERN_ERR "USB: No init for your chip yet\n");
753 return -ENODEV;
754 }
755 return 0;
756 }
757
758 subsys_initcall(omap_usb_init);
759