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Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[deliverable/linux.git] / 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 #include <linux/io.h>
31
32 #include <asm/irq.h>
33 #include <asm/system.h>
34 #include <mach/hardware.h>
35
36 #include <plat/control.h>
37 #include <plat/mux.h>
38 #include <plat/usb.h>
39 #include <plat/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
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
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
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
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
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 if (cpu_is_omap7xx()) {
141 omap_cfg_reg(AA17_7XX_USB_DM);
142 omap_cfg_reg(W16_7XX_USB_PU_EN);
143 omap_cfg_reg(W17_7XX_USB_VBUSI);
144 omap_cfg_reg(W18_7XX_USB_DMCK_OUT);
145 omap_cfg_reg(W19_7XX_USB_DCRST);
146 } else
147 omap_cfg_reg(W4_USB_PUEN);
148 }
149
150 /* internal transceiver (unavailable on 17xx, 24xx) */
151 if (!cpu_class_is_omap2() && nwires == 2) {
152 u32 l;
153
154 // omap_cfg_reg(P9_USB_DP);
155 // omap_cfg_reg(R8_USB_DM);
156
157 if (cpu_is_omap15xx()) {
158 /* This works on 1510-Innovator */
159 return 0;
160 }
161
162 /* NOTES:
163 * - peripheral should configure VBUS detection!
164 * - only peripherals may use the internal D+/D- pulldowns
165 * - OTG support on this port not yet written
166 */
167
168 /* Don't do this for omap7xx -- it causes USB to not work correctly */
169 if (!cpu_is_omap7xx()) {
170 l = omap_readl(USB_TRANSCEIVER_CTRL);
171 l &= ~(7 << 4);
172 if (!is_device)
173 l |= (3 << 1);
174 omap_writel(l, USB_TRANSCEIVER_CTRL);
175 }
176
177 return 3 << 16;
178 }
179
180 /* alternate pin config, external transceiver */
181 if (cpu_is_omap15xx()) {
182 printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
183 return 0;
184 }
185
186 if (cpu_is_omap24xx()) {
187 omap_cfg_reg(K18_24XX_USB0_DAT);
188 omap_cfg_reg(K19_24XX_USB0_TXEN);
189 omap_cfg_reg(J14_24XX_USB0_SE0);
190 if (nwires != 3)
191 omap_cfg_reg(J18_24XX_USB0_RCV);
192 } else {
193 omap_cfg_reg(V6_USB0_TXD);
194 omap_cfg_reg(W9_USB0_TXEN);
195 omap_cfg_reg(W5_USB0_SE0);
196 if (nwires != 3)
197 omap_cfg_reg(Y5_USB0_RCV);
198 }
199
200 /* NOTE: SPEED and SUSP aren't configured here. OTG hosts
201 * may be able to use I2C requests to set those bits along
202 * with VBUS switching and overcurrent detection.
203 */
204
205 if (cpu_class_is_omap1() && nwires != 6) {
206 u32 l;
207
208 l = omap_readl(USB_TRANSCEIVER_CTRL);
209 l &= ~CONF_USB2_UNI_R;
210 omap_writel(l, USB_TRANSCEIVER_CTRL);
211 }
212
213 switch (nwires) {
214 case 3:
215 syscon1 = 2;
216 if (cpu_is_omap24xx())
217 omap2_usb_devconf_set(0, USB_BIDIR);
218 break;
219 case 4:
220 syscon1 = 1;
221 if (cpu_is_omap24xx())
222 omap2_usb_devconf_set(0, USB_BIDIR);
223 break;
224 case 6:
225 syscon1 = 3;
226 if (cpu_is_omap24xx()) {
227 omap_cfg_reg(J19_24XX_USB0_VP);
228 omap_cfg_reg(K20_24XX_USB0_VM);
229 omap2_usb_devconf_set(0, USB_UNIDIR);
230 } else {
231 u32 l;
232
233 omap_cfg_reg(AA9_USB0_VP);
234 omap_cfg_reg(R9_USB0_VM);
235 l = omap_readl(USB_TRANSCEIVER_CTRL);
236 l |= CONF_USB2_UNI_R;
237 omap_writel(l, USB_TRANSCEIVER_CTRL);
238 }
239 break;
240 default:
241 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
242 0, nwires);
243 }
244 return syscon1 << 16;
245 }
246
247 static u32 __init omap_usb1_init(unsigned nwires)
248 {
249 u32 syscon1 = 0;
250
251 if (cpu_class_is_omap1() && !cpu_is_omap15xx() && nwires != 6) {
252 u32 l;
253
254 l = omap_readl(USB_TRANSCEIVER_CTRL);
255 l &= ~CONF_USB1_UNI_R;
256 omap_writel(l, USB_TRANSCEIVER_CTRL);
257 }
258 if (cpu_is_omap24xx())
259 omap2_usb_devconf_clear(1, USB_BIDIR_TLL);
260
261 if (nwires == 0)
262 return 0;
263
264 /* external transceiver */
265 if (cpu_class_is_omap1()) {
266 omap_cfg_reg(USB1_TXD);
267 omap_cfg_reg(USB1_TXEN);
268 if (nwires != 3)
269 omap_cfg_reg(USB1_RCV);
270 }
271
272 if (cpu_is_omap15xx()) {
273 omap_cfg_reg(USB1_SEO);
274 omap_cfg_reg(USB1_SPEED);
275 // SUSP
276 } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
277 omap_cfg_reg(W13_1610_USB1_SE0);
278 omap_cfg_reg(R13_1610_USB1_SPEED);
279 // SUSP
280 } else if (cpu_is_omap1710()) {
281 omap_cfg_reg(R13_1710_USB1_SE0);
282 // SUSP
283 } else if (cpu_is_omap24xx()) {
284 /* NOTE: board-specific code must set up pin muxing for usb1,
285 * since each signal could come out on either of two balls.
286 */
287 } else {
288 pr_debug("usb%d cpu unrecognized\n", 1);
289 return 0;
290 }
291
292 switch (nwires) {
293 case 2:
294 if (!cpu_is_omap24xx())
295 goto bad;
296 /* NOTE: board-specific code must override this setting if
297 * this TLL link is not using DP/DM
298 */
299 syscon1 = 1;
300 omap2_usb_devconf_set(1, USB_BIDIR_TLL);
301 break;
302 case 3:
303 syscon1 = 2;
304 if (cpu_is_omap24xx())
305 omap2_usb_devconf_set(1, USB_BIDIR);
306 break;
307 case 4:
308 syscon1 = 1;
309 if (cpu_is_omap24xx())
310 omap2_usb_devconf_set(1, USB_BIDIR);
311 break;
312 case 6:
313 if (cpu_is_omap24xx())
314 goto bad;
315 syscon1 = 3;
316 omap_cfg_reg(USB1_VP);
317 omap_cfg_reg(USB1_VM);
318 if (!cpu_is_omap15xx()) {
319 u32 l;
320
321 l = omap_readl(USB_TRANSCEIVER_CTRL);
322 l |= CONF_USB1_UNI_R;
323 omap_writel(l, USB_TRANSCEIVER_CTRL);
324 }
325 break;
326 default:
327 bad:
328 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
329 1, nwires);
330 }
331 return syscon1 << 20;
332 }
333
334 static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
335 {
336 u32 syscon1 = 0;
337
338 if (cpu_is_omap24xx()) {
339 omap2_usb2_disable_5pinbitll();
340 alt_pingroup = 0;
341 }
342
343 /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
344 if (alt_pingroup || nwires == 0)
345 return 0;
346
347 if (cpu_class_is_omap1() && !cpu_is_omap15xx() && nwires != 6) {
348 u32 l;
349
350 l = omap_readl(USB_TRANSCEIVER_CTRL);
351 l &= ~CONF_USB2_UNI_R;
352 omap_writel(l, USB_TRANSCEIVER_CTRL);
353 }
354
355 /* external transceiver */
356 if (cpu_is_omap15xx()) {
357 omap_cfg_reg(USB2_TXD);
358 omap_cfg_reg(USB2_TXEN);
359 omap_cfg_reg(USB2_SEO);
360 if (nwires != 3)
361 omap_cfg_reg(USB2_RCV);
362 /* there is no USB2_SPEED */
363 } else if (cpu_is_omap16xx()) {
364 omap_cfg_reg(V6_USB2_TXD);
365 omap_cfg_reg(W9_USB2_TXEN);
366 omap_cfg_reg(W5_USB2_SE0);
367 if (nwires != 3)
368 omap_cfg_reg(Y5_USB2_RCV);
369 // FIXME omap_cfg_reg(USB2_SPEED);
370 } else if (cpu_is_omap24xx()) {
371 omap_cfg_reg(Y11_24XX_USB2_DAT);
372 omap_cfg_reg(AA10_24XX_USB2_SE0);
373 if (nwires > 2)
374 omap_cfg_reg(AA12_24XX_USB2_TXEN);
375 if (nwires > 3)
376 omap_cfg_reg(AA6_24XX_USB2_RCV);
377 } else {
378 pr_debug("usb%d cpu unrecognized\n", 1);
379 return 0;
380 }
381 // if (cpu_class_is_omap1()) omap_cfg_reg(USB2_SUSP);
382
383 switch (nwires) {
384 case 2:
385 if (!cpu_is_omap24xx())
386 goto bad;
387 /* NOTE: board-specific code must override this setting if
388 * this TLL link is not using DP/DM
389 */
390 syscon1 = 1;
391 omap2_usb_devconf_set(2, USB_BIDIR_TLL);
392 break;
393 case 3:
394 syscon1 = 2;
395 if (cpu_is_omap24xx())
396 omap2_usb_devconf_set(2, USB_BIDIR);
397 break;
398 case 4:
399 syscon1 = 1;
400 if (cpu_is_omap24xx())
401 omap2_usb_devconf_set(2, USB_BIDIR);
402 break;
403 case 5:
404 if (!cpu_is_omap24xx())
405 goto bad;
406 omap_cfg_reg(AA4_24XX_USB2_TLLSE0);
407 /* NOTE: board-specific code must override this setting if
408 * this TLL link is not using DP/DM. Something must also
409 * set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED}
410 */
411 syscon1 = 3;
412 omap2_usb2_enable_5pinunitll();
413 break;
414 case 6:
415 if (cpu_is_omap24xx())
416 goto bad;
417 syscon1 = 3;
418 if (cpu_is_omap15xx()) {
419 omap_cfg_reg(USB2_VP);
420 omap_cfg_reg(USB2_VM);
421 } else {
422 u32 l;
423
424 omap_cfg_reg(AA9_USB2_VP);
425 omap_cfg_reg(R9_USB2_VM);
426 l = omap_readl(USB_TRANSCEIVER_CTRL);
427 l |= CONF_USB2_UNI_R;
428 omap_writel(l, USB_TRANSCEIVER_CTRL);
429 }
430 break;
431 default:
432 bad:
433 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
434 2, nwires);
435 }
436 return syscon1 << 24;
437 }
438
439 #endif
440
441 /*-------------------------------------------------------------------------*/
442
443 #ifdef CONFIG_USB_GADGET_OMAP
444
445 static struct resource udc_resources[] = {
446 /* order is significant! */
447 { /* registers */
448 .start = UDC_BASE,
449 .end = UDC_BASE + 0xff,
450 .flags = IORESOURCE_MEM,
451 }, { /* general IRQ */
452 .start = INT_USB_IRQ_GEN,
453 .flags = IORESOURCE_IRQ,
454 }, { /* PIO IRQ */
455 .start = INT_USB_IRQ_NISO,
456 .flags = IORESOURCE_IRQ,
457 }, { /* SOF IRQ */
458 .start = INT_USB_IRQ_ISO,
459 .flags = IORESOURCE_IRQ,
460 },
461 };
462
463 static u64 udc_dmamask = ~(u32)0;
464
465 static struct platform_device udc_device = {
466 .name = "omap_udc",
467 .id = -1,
468 .dev = {
469 .dma_mask = &udc_dmamask,
470 .coherent_dma_mask = 0xffffffff,
471 },
472 .num_resources = ARRAY_SIZE(udc_resources),
473 .resource = udc_resources,
474 };
475
476 #endif
477
478 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
479
480 /* The dmamask must be set for OHCI to work */
481 static u64 ohci_dmamask = ~(u32)0;
482
483 static struct resource ohci_resources[] = {
484 {
485 .start = OMAP_OHCI_BASE,
486 .end = OMAP_OHCI_BASE + 0xff,
487 .flags = IORESOURCE_MEM,
488 },
489 {
490 .start = INT_USB_IRQ_HGEN,
491 .flags = IORESOURCE_IRQ,
492 },
493 };
494
495 static struct platform_device ohci_device = {
496 .name = "ohci",
497 .id = -1,
498 .dev = {
499 .dma_mask = &ohci_dmamask,
500 .coherent_dma_mask = 0xffffffff,
501 },
502 .num_resources = ARRAY_SIZE(ohci_resources),
503 .resource = ohci_resources,
504 };
505
506 #endif
507
508 #if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
509
510 static struct resource otg_resources[] = {
511 /* order is significant! */
512 {
513 .start = OTG_BASE,
514 .end = OTG_BASE + 0xff,
515 .flags = IORESOURCE_MEM,
516 }, {
517 .start = INT_USB_IRQ_OTG,
518 .flags = IORESOURCE_IRQ,
519 },
520 };
521
522 static struct platform_device otg_device = {
523 .name = "omap_otg",
524 .id = -1,
525 .num_resources = ARRAY_SIZE(otg_resources),
526 .resource = otg_resources,
527 };
528
529 #endif
530
531 /*-------------------------------------------------------------------------*/
532
533 // FIXME correct answer depends on hmc_mode,
534 // as does (on omap1) any nonzero value for config->otg port number
535 #ifdef CONFIG_USB_GADGET_OMAP
536 #define is_usb0_device(config) 1
537 #else
538 #define is_usb0_device(config) 0
539 #endif
540
541 /*-------------------------------------------------------------------------*/
542
543 #ifdef CONFIG_ARCH_OMAP_OTG
544
545 void __init
546 omap_otg_init(struct omap_usb_config *config)
547 {
548 u32 syscon;
549 int status;
550 int alt_pingroup = 0;
551
552 /* NOTE: no bus or clock setup (yet?) */
553
554 syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
555 if (!(syscon & OTG_RESET_DONE))
556 pr_debug("USB resets not complete?\n");
557
558 //omap_writew(0, OTG_IRQ_EN);
559
560 /* pin muxing and transceiver pinouts */
561 if (config->pins[0] > 2) /* alt pingroup 2 */
562 alt_pingroup = 1;
563 syscon |= omap_usb0_init(config->pins[0], is_usb0_device(config));
564 syscon |= omap_usb1_init(config->pins[1]);
565 syscon |= omap_usb2_init(config->pins[2], alt_pingroup);
566 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
567 omap_writel(syscon, OTG_SYSCON_1);
568
569 syscon = config->hmc_mode;
570 syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
571 #ifdef CONFIG_USB_OTG
572 if (config->otg)
573 syscon |= OTG_EN;
574 #endif
575 if (cpu_class_is_omap1())
576 pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
577 omap_readl(USB_TRANSCEIVER_CTRL));
578 pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2));
579 omap_writel(syscon, OTG_SYSCON_2);
580
581 printk("USB: hmc %d", config->hmc_mode);
582 if (!alt_pingroup)
583 printk(", usb2 alt %d wires", config->pins[2]);
584 else if (config->pins[0])
585 printk(", usb0 %d wires%s", config->pins[0],
586 is_usb0_device(config) ? " (dev)" : "");
587 if (config->pins[1])
588 printk(", usb1 %d wires", config->pins[1]);
589 if (!alt_pingroup && config->pins[2])
590 printk(", usb2 %d wires", config->pins[2]);
591 if (config->otg)
592 printk(", Mini-AB on usb%d", config->otg - 1);
593 printk("\n");
594
595 if (cpu_class_is_omap1()) {
596 u16 w;
597
598 /* leave USB clocks/controllers off until needed */
599 w = omap_readw(ULPD_SOFT_REQ);
600 w &= ~SOFT_USB_CLK_REQ;
601 omap_writew(w, ULPD_SOFT_REQ);
602
603 w = omap_readw(ULPD_CLOCK_CTRL);
604 w &= ~USB_MCLK_EN;
605 w |= DIS_USB_PVCI_CLK;
606 omap_writew(w, ULPD_CLOCK_CTRL);
607 }
608 syscon = omap_readl(OTG_SYSCON_1);
609 syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
610
611 #ifdef CONFIG_USB_GADGET_OMAP
612 if (config->otg || config->register_dev) {
613 syscon &= ~DEV_IDLE_EN;
614 udc_device.dev.platform_data = config;
615 /* IRQ numbers for omap7xx */
616 if(cpu_is_omap7xx()) {
617 udc_resources[1].start = INT_7XX_USB_GENI;
618 udc_resources[2].start = INT_7XX_USB_NON_ISO;
619 udc_resources[3].start = INT_7XX_USB_ISO;
620 }
621 status = platform_device_register(&udc_device);
622 if (status)
623 pr_debug("can't register UDC device, %d\n", status);
624 }
625 #endif
626
627 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
628 if (config->otg || config->register_host) {
629 syscon &= ~HST_IDLE_EN;
630 ohci_device.dev.platform_data = config;
631 if (cpu_is_omap7xx())
632 ohci_resources[1].start = INT_7XX_USB_HHC_1;
633 status = platform_device_register(&ohci_device);
634 if (status)
635 pr_debug("can't register OHCI device, %d\n", status);
636 }
637 #endif
638
639 #ifdef CONFIG_USB_OTG
640 if (config->otg) {
641 syscon &= ~OTG_IDLE_EN;
642 otg_device.dev.platform_data = config;
643 if (cpu_is_omap7xx())
644 otg_resources[1].start = INT_7XX_USB_OTG;
645 status = platform_device_register(&otg_device);
646 if (status)
647 pr_debug("can't register OTG device, %d\n", status);
648 }
649 #endif
650 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
651 omap_writel(syscon, OTG_SYSCON_1);
652
653 status = 0;
654 }
655
656 #else
657 static inline void omap_otg_init(struct omap_usb_config *config) {}
658 #endif
659
660 /*-------------------------------------------------------------------------*/
661
662 #ifdef CONFIG_ARCH_OMAP15XX
663
664 /* ULPD_DPLL_CTRL */
665 #define DPLL_IOB (1 << 13)
666 #define DPLL_PLL_ENABLE (1 << 4)
667 #define DPLL_LOCK (1 << 0)
668
669 /* ULPD_APLL_CTRL */
670 #define APLL_NDPLL_SWITCH (1 << 0)
671
672
673 static void __init omap_1510_usb_init(struct omap_usb_config *config)
674 {
675 unsigned int val;
676 u16 w;
677
678 omap_usb0_init(config->pins[0], is_usb0_device(config));
679 omap_usb1_init(config->pins[1]);
680 omap_usb2_init(config->pins[2], 0);
681
682 val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
683 val |= (config->hmc_mode << 1);
684 omap_writel(val, MOD_CONF_CTRL_0);
685
686 printk("USB: hmc %d", config->hmc_mode);
687 if (config->pins[0])
688 printk(", usb0 %d wires%s", config->pins[0],
689 is_usb0_device(config) ? " (dev)" : "");
690 if (config->pins[1])
691 printk(", usb1 %d wires", config->pins[1]);
692 if (config->pins[2])
693 printk(", usb2 %d wires", config->pins[2]);
694 printk("\n");
695
696 /* use DPLL for 48 MHz function clock */
697 pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL),
698 omap_readw(ULPD_DPLL_CTRL), omap_readw(ULPD_SOFT_REQ));
699
700 w = omap_readw(ULPD_APLL_CTRL);
701 w &= ~APLL_NDPLL_SWITCH;
702 omap_writew(w, ULPD_APLL_CTRL);
703
704 w = omap_readw(ULPD_DPLL_CTRL);
705 w |= DPLL_IOB | DPLL_PLL_ENABLE;
706 omap_writew(w, ULPD_DPLL_CTRL);
707
708 w = omap_readw(ULPD_SOFT_REQ);
709 w |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
710 omap_writew(w, ULPD_SOFT_REQ);
711
712 while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
713 cpu_relax();
714
715 #ifdef CONFIG_USB_GADGET_OMAP
716 if (config->register_dev) {
717 int status;
718
719 udc_device.dev.platform_data = config;
720 status = platform_device_register(&udc_device);
721 if (status)
722 pr_debug("can't register UDC device, %d\n", status);
723 /* udc driver gates 48MHz by D+ pullup */
724 }
725 #endif
726
727 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
728 if (config->register_host) {
729 int status;
730
731 ohci_device.dev.platform_data = config;
732 status = platform_device_register(&ohci_device);
733 if (status)
734 pr_debug("can't register OHCI device, %d\n", status);
735 /* hcd explicitly gates 48MHz */
736 }
737 #endif
738 }
739
740 #else
741 static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
742 #endif
743
744 /*-------------------------------------------------------------------------*/
745
746 void __init omap_usb_init(struct omap_usb_config *pdata)
747 {
748 if (cpu_is_omap7xx() || cpu_is_omap16xx() || cpu_is_omap24xx())
749 omap_otg_init(pdata);
750 else if (cpu_is_omap15xx())
751 omap_1510_usb_init(pdata);
752 else
753 printk(KERN_ERR "USB: No init for your chip yet\n");
754 }
755
Linux kernel - Deliverables
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