?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
x86/speculation/mds: Fix documentation typo
[linux/fpc-iii.git] / arch / arm / mach-omap1 / usb.c
blob455e2cf2866da15c1a667433bad3d524b0f8358b
1 /*
2 * Platform level USB initialization for FS USB OTG controller on omap1
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 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/platform_device.h>
25 #include <linux/io.h>
26
27 #include <asm/irq.h>
28
29 #include <mach/mux.h>
30
31 #include <mach/usb.h>
32
33 #include "common.h"
34
35 /* These routines should handle the standard chip-specific modes
36 * for usb0/1/2 ports, covering basic mux and transceiver setup.
37 *
38 * Some board-*.c files will need to set up additional mux options,
39 * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
40 */
41
42 /* TESTED ON:
43 * - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
44 * - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
45 * - 5912 OSK UDC, with *nonstandard* A-to-A cable
46 * - 1510 Innovator UDC with bundled usb0 cable
47 * - 1510 Innovator OHCI with bundled usb1/usb2 cable
48 * - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
49 * - 1710 custom development board using alternate pin group
50 * - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
51 */
52
53 #define INT_USB_IRQ_GEN IH2_BASE + 20
54 #define INT_USB_IRQ_NISO IH2_BASE + 30
55 #define INT_USB_IRQ_ISO IH2_BASE + 29
56 #define INT_USB_IRQ_HGEN INT_USB_HHC_1
57 #define INT_USB_IRQ_OTG IH2_BASE + 8
58
59 #ifdef CONFIG_ARCH_OMAP_OTG
60
61 static void __init
62 omap_otg_init(struct omap_usb_config *config)
63 {
64 u32 syscon;
65 int alt_pingroup = 0;
66 u16 w;
67
68 /* NOTE: no bus or clock setup (yet?) */
69
70 syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
71 if (!(syscon & OTG_RESET_DONE))
72 pr_debug("USB resets not complete?\n");
73
74 //omap_writew(0, OTG_IRQ_EN);
75
76 /* pin muxing and transceiver pinouts */
77 if (config->pins[0] > 2) /* alt pingroup 2 */
78 alt_pingroup = 1;
79 syscon |= config->usb0_init(config->pins[0], is_usb0_device(config));
80 syscon |= config->usb1_init(config->pins[1]);
81 syscon |= config->usb2_init(config->pins[2], alt_pingroup);
82 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
83 omap_writel(syscon, OTG_SYSCON_1);
84
85 syscon = config->hmc_mode;
86 syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
87 #ifdef CONFIG_USB_OTG
88 if (config->otg)
89 syscon |= OTG_EN;
90 #endif
91 pr_debug("USB_TRANSCEIVER_CTRL = %03x\n",
92 omap_readl(USB_TRANSCEIVER_CTRL));
93 pr_debug("OTG_SYSCON_2 = %08x\n", omap_readl(OTG_SYSCON_2));
94 omap_writel(syscon, OTG_SYSCON_2);
95
96 printk("USB: hmc %d", config->hmc_mode);
97 if (!alt_pingroup)
98 pr_cont(", usb2 alt %d wires", config->pins[2]);
99 else if (config->pins[0])
100 pr_cont(", usb0 %d wires%s", config->pins[0],
101 is_usb0_device(config) ? " (dev)" : "");
102 if (config->pins[1])
103 pr_cont(", usb1 %d wires", config->pins[1]);
104 if (!alt_pingroup && config->pins[2])
105 pr_cont(", usb2 %d wires", config->pins[2]);
106 if (config->otg)
107 pr_cont(", Mini-AB on usb%d", config->otg - 1);
108 pr_cont("\n");
109
110 /* leave USB clocks/controllers off until needed */
111 w = omap_readw(ULPD_SOFT_REQ);
112 w &= ~SOFT_USB_CLK_REQ;
113 omap_writew(w, ULPD_SOFT_REQ);
114
115 w = omap_readw(ULPD_CLOCK_CTRL);
116 w &= ~USB_MCLK_EN;
117 w |= DIS_USB_PVCI_CLK;
118 omap_writew(w, ULPD_CLOCK_CTRL);
119
120 syscon = omap_readl(OTG_SYSCON_1);
121 syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
122
123 #if IS_ENABLED(CONFIG_USB_OMAP)
124 if (config->otg || config->register_dev) {
125 struct platform_device *udc_device = config->udc_device;
126 int status;
127
128 syscon &= ~DEV_IDLE_EN;
129 udc_device->dev.platform_data = config;
130 status = platform_device_register(udc_device);
131 if (status)
132 pr_debug("can't register UDC device, %d\n", status);
133 }
134 #endif
135
136 #if IS_ENABLED(CONFIG_USB_OHCI_HCD)
137 if (config->otg || config->register_host) {
138 struct platform_device *ohci_device = config->ohci_device;
139 int status;
140
141 syscon &= ~HST_IDLE_EN;
142 ohci_device->dev.platform_data = config;
143 status = platform_device_register(ohci_device);
144 if (status)
145 pr_debug("can't register OHCI device, %d\n", status);
146 }
147 #endif
148
149 #ifdef CONFIG_USB_OTG
150 if (config->otg) {
151 struct platform_device *otg_device = config->otg_device;
152 int status;
153
154 syscon &= ~OTG_IDLE_EN;
155 otg_device->dev.platform_data = config;
156 status = platform_device_register(otg_device);
157 if (status)
158 pr_debug("can't register OTG device, %d\n", status);
159 }
160 #endif
161 pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
162 omap_writel(syscon, OTG_SYSCON_1);
163 }
164
165 #else
166 static void omap_otg_init(struct omap_usb_config *config) {}
167 #endif
168
169 #if IS_ENABLED(CONFIG_USB_OMAP)
170
171 static struct resource udc_resources[] = {
172 /* order is significant! */
173 { /* registers */
174 .start = UDC_BASE,
175 .end = UDC_BASE + 0xff,
176 .flags = IORESOURCE_MEM,
177 }, { /* general IRQ */
178 .start = INT_USB_IRQ_GEN,
179 .flags = IORESOURCE_IRQ,
180 }, { /* PIO IRQ */
181 .start = INT_USB_IRQ_NISO,
182 .flags = IORESOURCE_IRQ,
183 }, { /* SOF IRQ */
184 .start = INT_USB_IRQ_ISO,
185 .flags = IORESOURCE_IRQ,
186 },
187 };
188
189 static u64 udc_dmamask = ~(u32)0;
190
191 static struct platform_device udc_device = {
192 .name = "omap_udc",
193 .id = -1,
194 .dev = {
195 .dma_mask = &udc_dmamask,
196 .coherent_dma_mask = 0xffffffff,
197 },
198 .num_resources = ARRAY_SIZE(udc_resources),
199 .resource = udc_resources,
200 };
201
202 static inline void udc_device_init(struct omap_usb_config *pdata)
203 {
204 /* IRQ numbers for omap7xx */
205 if(cpu_is_omap7xx()) {
206 udc_resources[1].start = INT_7XX_USB_GENI;
207 udc_resources[2].start = INT_7XX_USB_NON_ISO;
208 udc_resources[3].start = INT_7XX_USB_ISO;
209 }
210 pdata->udc_device = &udc_device;
211 }
212
213 #else
214
215 static inline void udc_device_init(struct omap_usb_config *pdata)
216 {
217 }
218
219 #endif
220
221 #if IS_ENABLED(CONFIG_USB_OHCI_HCD)
222
223 /* The dmamask must be set for OHCI to work */
224 static u64 ohci_dmamask = ~(u32)0;
225
226 static struct resource ohci_resources[] = {
227 {
228 .start = OMAP_OHCI_BASE,
229 .end = OMAP_OHCI_BASE + 0xff,
230 .flags = IORESOURCE_MEM,
231 },
232 {
233 .start = INT_USB_IRQ_HGEN,
234 .flags = IORESOURCE_IRQ,
235 },
236 };
237
238 static struct platform_device ohci_device = {
239 .name = "ohci",
240 .id = -1,
241 .dev = {
242 .dma_mask = &ohci_dmamask,
243 .coherent_dma_mask = 0xffffffff,
244 },
245 .num_resources = ARRAY_SIZE(ohci_resources),
246 .resource = ohci_resources,
247 };
248
249 static inline void ohci_device_init(struct omap_usb_config *pdata)
250 {
251 if (cpu_is_omap7xx())
252 ohci_resources[1].start = INT_7XX_USB_HHC_1;
253 pdata->ohci_device = &ohci_device;
254 pdata->ocpi_enable = &ocpi_enable;
255 }
256
257 #else
258
259 static inline void ohci_device_init(struct omap_usb_config *pdata)
260 {
261 }
262
263 #endif
264
265 #if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
266
267 static struct resource otg_resources[] = {
268 /* order is significant! */
269 {
270 .start = OTG_BASE,
271 .end = OTG_BASE + 0xff,
272 .flags = IORESOURCE_MEM,
273 }, {
274 .start = INT_USB_IRQ_OTG,
275 .flags = IORESOURCE_IRQ,
276 },
277 };
278
279 static struct platform_device otg_device = {
280 .name = "omap_otg",
281 .id = -1,
282 .num_resources = ARRAY_SIZE(otg_resources),
283 .resource = otg_resources,
284 };
285
286 static inline void otg_device_init(struct omap_usb_config *pdata)
287 {
288 if (cpu_is_omap7xx())
289 otg_resources[1].start = INT_7XX_USB_OTG;
290 pdata->otg_device = &otg_device;
291 }
292
293 #else
294
295 static inline void otg_device_init(struct omap_usb_config *pdata)
296 {
297 }
298
299 #endif
300
301 static u32 __init omap1_usb0_init(unsigned nwires, unsigned is_device)
302 {
303 u32 syscon1 = 0;
304
305 if (nwires == 0) {
306 if (!cpu_is_omap15xx()) {
307 u32 l;
308
309 /* pulldown D+/D- */
310 l = omap_readl(USB_TRANSCEIVER_CTRL);
311 l &= ~(3 << 1);
312 omap_writel(l, USB_TRANSCEIVER_CTRL);
313 }
314 return 0;
315 }
316
317 if (is_device) {
318 if (cpu_is_omap7xx()) {
319 omap_cfg_reg(AA17_7XX_USB_DM);
320 omap_cfg_reg(W16_7XX_USB_PU_EN);
321 omap_cfg_reg(W17_7XX_USB_VBUSI);
322 omap_cfg_reg(W18_7XX_USB_DMCK_OUT);
323 omap_cfg_reg(W19_7XX_USB_DCRST);
324 } else
325 omap_cfg_reg(W4_USB_PUEN);
326 }
327
328 if (nwires == 2) {
329 u32 l;
330
331 // omap_cfg_reg(P9_USB_DP);
332 // omap_cfg_reg(R8_USB_DM);
333
334 if (cpu_is_omap15xx()) {
335 /* This works on 1510-Innovator */
336 return 0;
337 }
338
339 /* NOTES:
340 * - peripheral should configure VBUS detection!
341 * - only peripherals may use the internal D+/D- pulldowns
342 * - OTG support on this port not yet written
343 */
344
345 /* Don't do this for omap7xx -- it causes USB to not work correctly */
346 if (!cpu_is_omap7xx()) {
347 l = omap_readl(USB_TRANSCEIVER_CTRL);
348 l &= ~(7 << 4);
349 if (!is_device)
350 l |= (3 << 1);
351 omap_writel(l, USB_TRANSCEIVER_CTRL);
352 }
353
354 return 3 << 16;
355 }
356
357 /* alternate pin config, external transceiver */
358 if (cpu_is_omap15xx()) {
359 printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
360 return 0;
361 }
362
363 omap_cfg_reg(V6_USB0_TXD);
364 omap_cfg_reg(W9_USB0_TXEN);
365 omap_cfg_reg(W5_USB0_SE0);
366 if (nwires != 3)
367 omap_cfg_reg(Y5_USB0_RCV);
368
369 /* NOTE: SPEED and SUSP aren't configured here. OTG hosts
370 * may be able to use I2C requests to set those bits along
371 * with VBUS switching and overcurrent detection.
372 */
373
374 if (nwires != 6) {
375 u32 l;
376
377 l = omap_readl(USB_TRANSCEIVER_CTRL);
378 l &= ~CONF_USB2_UNI_R;
379 omap_writel(l, USB_TRANSCEIVER_CTRL);
380 }
381
382 switch (nwires) {
383 case 3:
384 syscon1 = 2;
385 break;
386 case 4:
387 syscon1 = 1;
388 break;
389 case 6:
390 syscon1 = 3;
391 {
392 u32 l;
393
394 omap_cfg_reg(AA9_USB0_VP);
395 omap_cfg_reg(R9_USB0_VM);
396 l = omap_readl(USB_TRANSCEIVER_CTRL);
397 l |= CONF_USB2_UNI_R;
398 omap_writel(l, USB_TRANSCEIVER_CTRL);
399 }
400 break;
401 default:
402 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
403 0, nwires);
404 }
405
406 return syscon1 << 16;
407 }
408
409 static u32 __init omap1_usb1_init(unsigned nwires)
410 {
411 u32 syscon1 = 0;
412
413 if (!cpu_is_omap15xx() && nwires != 6) {
414 u32 l;
415
416 l = omap_readl(USB_TRANSCEIVER_CTRL);
417 l &= ~CONF_USB1_UNI_R;
418 omap_writel(l, USB_TRANSCEIVER_CTRL);
419 }
420 if (nwires == 0)
421 return 0;
422
423 /* external transceiver */
424 omap_cfg_reg(USB1_TXD);
425 omap_cfg_reg(USB1_TXEN);
426 if (nwires != 3)
427 omap_cfg_reg(USB1_RCV);
428
429 if (cpu_is_omap15xx()) {
430 omap_cfg_reg(USB1_SEO);
431 omap_cfg_reg(USB1_SPEED);
432 // SUSP
433 } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
434 omap_cfg_reg(W13_1610_USB1_SE0);
435 omap_cfg_reg(R13_1610_USB1_SPEED);
436 // SUSP
437 } else if (cpu_is_omap1710()) {
438 omap_cfg_reg(R13_1710_USB1_SE0);
439 // SUSP
440 } else {
441 pr_debug("usb%d cpu unrecognized\n", 1);
442 return 0;
443 }
444
445 switch (nwires) {
446 case 2:
447 goto bad;
448 case 3:
449 syscon1 = 2;
450 break;
451 case 4:
452 syscon1 = 1;
453 break;
454 case 6:
455 syscon1 = 3;
456 omap_cfg_reg(USB1_VP);
457 omap_cfg_reg(USB1_VM);
458 if (!cpu_is_omap15xx()) {
459 u32 l;
460
461 l = omap_readl(USB_TRANSCEIVER_CTRL);
462 l |= CONF_USB1_UNI_R;
463 omap_writel(l, USB_TRANSCEIVER_CTRL);
464 }
465 break;
466 default:
467 bad:
468 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
469 1, nwires);
470 }
471
472 return syscon1 << 20;
473 }
474
475 static u32 __init omap1_usb2_init(unsigned nwires, unsigned alt_pingroup)
476 {
477 u32 syscon1 = 0;
478
479 /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
480 if (alt_pingroup || nwires == 0)
481 return 0;
482
483 if (!cpu_is_omap15xx() && nwires != 6) {
484 u32 l;
485
486 l = omap_readl(USB_TRANSCEIVER_CTRL);
487 l &= ~CONF_USB2_UNI_R;
488 omap_writel(l, USB_TRANSCEIVER_CTRL);
489 }
490
491 /* external transceiver */
492 if (cpu_is_omap15xx()) {
493 omap_cfg_reg(USB2_TXD);
494 omap_cfg_reg(USB2_TXEN);
495 omap_cfg_reg(USB2_SEO);
496 if (nwires != 3)
497 omap_cfg_reg(USB2_RCV);
498 /* there is no USB2_SPEED */
499 } else if (cpu_is_omap16xx()) {
500 omap_cfg_reg(V6_USB2_TXD);
501 omap_cfg_reg(W9_USB2_TXEN);
502 omap_cfg_reg(W5_USB2_SE0);
503 if (nwires != 3)
504 omap_cfg_reg(Y5_USB2_RCV);
505 // FIXME omap_cfg_reg(USB2_SPEED);
506 } else {
507 pr_debug("usb%d cpu unrecognized\n", 1);
508 return 0;
509 }
510
511 // omap_cfg_reg(USB2_SUSP);
512
513 switch (nwires) {
514 case 2:
515 goto bad;
516 case 3:
517 syscon1 = 2;
518 break;
519 case 4:
520 syscon1 = 1;
521 break;
522 case 5:
523 goto bad;
524 case 6:
525 syscon1 = 3;
526 if (cpu_is_omap15xx()) {
527 omap_cfg_reg(USB2_VP);
528 omap_cfg_reg(USB2_VM);
529 } else {
530 u32 l;
531
532 omap_cfg_reg(AA9_USB2_VP);
533 omap_cfg_reg(R9_USB2_VM);
534 l = omap_readl(USB_TRANSCEIVER_CTRL);
535 l |= CONF_USB2_UNI_R;
536 omap_writel(l, USB_TRANSCEIVER_CTRL);
537 }
538 break;
539 default:
540 bad:
541 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
542 2, nwires);
543 }
544
545 return syscon1 << 24;
546 }
547
548 #ifdef CONFIG_ARCH_OMAP15XX
549
550 /* ULPD_DPLL_CTRL */
551 #define DPLL_IOB (1 << 13)
552 #define DPLL_PLL_ENABLE (1 << 4)
553 #define DPLL_LOCK (1 << 0)
554
555 /* ULPD_APLL_CTRL */
556 #define APLL_NDPLL_SWITCH (1 << 0)
557
558 static void __init omap_1510_usb_init(struct omap_usb_config *config)
559 {
560 unsigned int val;
561 u16 w;
562
563 config->usb0_init(config->pins[0], is_usb0_device(config));
564 config->usb1_init(config->pins[1]);
565 config->usb2_init(config->pins[2], 0);
566
567 val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
568 val |= (config->hmc_mode << 1);
569 omap_writel(val, MOD_CONF_CTRL_0);
570
571 printk("USB: hmc %d", config->hmc_mode);
572 if (config->pins[0])
573 pr_cont(", usb0 %d wires%s", config->pins[0],
574 is_usb0_device(config) ? " (dev)" : "");
575 if (config->pins[1])
576 pr_cont(", usb1 %d wires", config->pins[1]);
577 if (config->pins[2])
578 pr_cont(", usb2 %d wires", config->pins[2]);
579 pr_cont("\n");
580
581 /* use DPLL for 48 MHz function clock */
582 pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL),
583 omap_readw(ULPD_DPLL_CTRL), omap_readw(ULPD_SOFT_REQ));
584
585 w = omap_readw(ULPD_APLL_CTRL);
586 w &= ~APLL_NDPLL_SWITCH;
587 omap_writew(w, ULPD_APLL_CTRL);
588
589 w = omap_readw(ULPD_DPLL_CTRL);
590 w |= DPLL_IOB | DPLL_PLL_ENABLE;
591 omap_writew(w, ULPD_DPLL_CTRL);
592
593 w = omap_readw(ULPD_SOFT_REQ);
594 w |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
595 omap_writew(w, ULPD_SOFT_REQ);
596
597 while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
598 cpu_relax();
599
600 #if IS_ENABLED(CONFIG_USB_OMAP)
601 if (config->register_dev) {
602 int status;
603
604 udc_device.dev.platform_data = config;
605 status = platform_device_register(&udc_device);
606 if (status)
607 pr_debug("can't register UDC device, %d\n", status);
608 /* udc driver gates 48MHz by D+ pullup */
609 }
610 #endif
611
612 #if IS_ENABLED(CONFIG_USB_OHCI_HCD)
613 if (config->register_host) {
614 int status;
615
616 ohci_device.dev.platform_data = config;
617 status = platform_device_register(&ohci_device);
618 if (status)
619 pr_debug("can't register OHCI device, %d\n", status);
620 /* hcd explicitly gates 48MHz */
621 }
622 #endif
623 }
624
625 #else
626 static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
627 #endif
628
629 void __init omap1_usb_init(struct omap_usb_config *_pdata)
630 {
631 struct omap_usb_config *pdata;
632
633 pdata = kmemdup(_pdata, sizeof(*pdata), GFP_KERNEL);
634 if (!pdata)
635 return;
636
637 pdata->usb0_init = omap1_usb0_init;
638 pdata->usb1_init = omap1_usb1_init;
639 pdata->usb2_init = omap1_usb2_init;
640 udc_device_init(pdata);
641 ohci_device_init(pdata);
642 otg_device_init(pdata);
643
644 if (cpu_is_omap7xx() || cpu_is_omap16xx())
645 omap_otg_init(pdata);
646 else if (cpu_is_omap15xx())
647 omap_1510_usb_init(pdata);
648 else
649 printk(KERN_ERR "USB: No init for your chip yet\n");
650 }
Linux with added FPC-III support