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[PATCH] ARM: Remove machine description macros
[deliverable/linux.git] / arch / arm / mach-omap / usb.c
1 /*
2 * arch/arm/mach-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/config.h>
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/types.h>
27 #include <linux/errno.h>
28 #include <linux/init.h>
29 #include <linux/device.h>
30 #include <linux/usb_otg.h>
31
32 #include <asm/io.h>
33 #include <asm/irq.h>
34 #include <asm/system.h>
35 #include <asm/hardware.h>
36 #include <asm/mach-types.h>
37
38 #include <asm/arch/mux.h>
39 #include <asm/arch/usb.h>
40 #include <asm/arch/board.h>
41
42 /* These routines should handle the standard chip-specific modes
43 * for usb0/1/2 ports, covering basic mux and transceiver setup.
44 *
45 * Some board-*.c files will need to set up additional mux options,
46 * like for suspend handling, vbus sensing, GPIOs, and the D+ pullup.
47 */
48
49 /* TESTED ON:
50 * - 1611B H2 (with usb1 mini-AB) using standard Mini-B or OTG cables
51 * - 5912 OSK OHCI (with usb0 standard-A), standard A-to-B cables
52 * - 5912 OSK UDC, with *nonstandard* A-to-A cable
53 * - 1510 Innovator UDC with bundled usb0 cable
54 * - 1510 Innovator OHCI with bundled usb1/usb2 cable
55 * - 1510 Innovator OHCI with custom usb0 cable, feeding 5V VBUS
56 * - 1710 custom development board using alternate pin group
57 * - 1710 H3 (with usb1 mini-AB) using standard Mini-B or OTG cables
58 */
59
60 /*-------------------------------------------------------------------------*/
61
62 #ifdef CONFIG_ARCH_OMAP_OTG
63
64 static struct otg_transceiver *xceiv;
65
66 /**
67 * otg_get_transceiver - find the (single) OTG transceiver driver
68 *
69 * Returns the transceiver driver, after getting a refcount to it; or
70 * null if there is no such transceiver. The caller is responsible for
71 * releasing that count.
72 */
73 struct otg_transceiver *otg_get_transceiver(void)
74 {
75 if (xceiv)
76 get_device(xceiv->dev);
77 return xceiv;
78 }
79 EXPORT_SYMBOL(otg_get_transceiver);
80
81 int otg_set_transceiver(struct otg_transceiver *x)
82 {
83 if (xceiv && x)
84 return -EBUSY;
85 xceiv = x;
86 return 0;
87 }
88 EXPORT_SYMBOL(otg_set_transceiver);
89
90 #endif
91
92 /*-------------------------------------------------------------------------*/
93
94 static u32 __init omap_usb0_init(unsigned nwires, unsigned is_device)
95 {
96 u32 syscon1 = 0;
97
98 if (nwires == 0) {
99 if (!cpu_is_omap15xx()) {
100 /* pulldown D+/D- */
101 USB_TRANSCEIVER_CTRL_REG &= ~(3 << 1);
102 }
103 return 0;
104 }
105
106 if (is_device)
107 omap_cfg_reg(W4_USB_PUEN);
108
109 /* internal transceiver */
110 if (nwires == 2) {
111 // omap_cfg_reg(P9_USB_DP);
112 // omap_cfg_reg(R8_USB_DM);
113
114 if (cpu_is_omap15xx()) {
115 /* This works on 1510-Innovator */
116 return 0;
117 }
118
119 /* NOTES:
120 * - peripheral should configure VBUS detection!
121 * - only peripherals may use the internal D+/D- pulldowns
122 * - OTG support on this port not yet written
123 */
124
125 USB_TRANSCEIVER_CTRL_REG &= ~(7 << 4);
126 if (!is_device)
127 USB_TRANSCEIVER_CTRL_REG |= (3 << 1);
128
129 return 3 << 16;
130 }
131
132 /* alternate pin config, external transceiver */
133 if (cpu_is_omap15xx()) {
134 printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
135 return 0;
136 }
137
138 omap_cfg_reg(V6_USB0_TXD);
139 omap_cfg_reg(W9_USB0_TXEN);
140 omap_cfg_reg(W5_USB0_SE0);
141
142 /* NOTE: SPEED and SUSP aren't configured here */
143
144 if (nwires != 3)
145 omap_cfg_reg(Y5_USB0_RCV);
146 if (nwires != 6)
147 USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R;
148
149 switch (nwires) {
150 case 3:
151 syscon1 = 2;
152 break;
153 case 4:
154 syscon1 = 1;
155 break;
156 case 6:
157 syscon1 = 3;
158 omap_cfg_reg(AA9_USB0_VP);
159 omap_cfg_reg(R9_USB0_VM);
160 USB_TRANSCEIVER_CTRL_REG |= CONF_USB2_UNI_R;
161 break;
162 default:
163 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
164 0, nwires);
165 }
166 return syscon1 << 16;
167 }
168
169 static u32 __init omap_usb1_init(unsigned nwires)
170 {
171 u32 syscon1 = 0;
172
173 if (nwires != 6 && !cpu_is_omap15xx())
174 USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB1_UNI_R;
175 if (nwires == 0)
176 return 0;
177
178 /* external transceiver */
179 omap_cfg_reg(USB1_TXD);
180 omap_cfg_reg(USB1_TXEN);
181 if (cpu_is_omap15xx()) {
182 omap_cfg_reg(USB1_SEO);
183 omap_cfg_reg(USB1_SPEED);
184 // SUSP
185 } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
186 omap_cfg_reg(W13_1610_USB1_SE0);
187 omap_cfg_reg(R13_1610_USB1_SPEED);
188 // SUSP
189 } else if (cpu_is_omap1710()) {
190 omap_cfg_reg(R13_1710_USB1_SE0);
191 // SUSP
192 } else {
193 pr_debug("usb unrecognized\n");
194 }
195 if (nwires != 3)
196 omap_cfg_reg(USB1_RCV);
197
198 switch (nwires) {
199 case 3:
200 syscon1 = 2;
201 break;
202 case 4:
203 syscon1 = 1;
204 break;
205 case 6:
206 syscon1 = 3;
207 omap_cfg_reg(USB1_VP);
208 omap_cfg_reg(USB1_VM);
209 if (!cpu_is_omap15xx())
210 USB_TRANSCEIVER_CTRL_REG |= CONF_USB1_UNI_R;
211 break;
212 default:
213 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
214 1, nwires);
215 }
216 return syscon1 << 20;
217 }
218
219 static u32 __init omap_usb2_init(unsigned nwires, unsigned alt_pingroup)
220 {
221 u32 syscon1 = 0;
222
223 /* NOTE erratum: must leave USB2_UNI_R set if usb0 in use */
224 if (alt_pingroup || nwires == 0)
225 return 0;
226 if (nwires != 6 && !cpu_is_omap15xx())
227 USB_TRANSCEIVER_CTRL_REG &= ~CONF_USB2_UNI_R;
228
229 /* external transceiver */
230 if (cpu_is_omap15xx()) {
231 omap_cfg_reg(USB2_TXD);
232 omap_cfg_reg(USB2_TXEN);
233 omap_cfg_reg(USB2_SEO);
234 if (nwires != 3)
235 omap_cfg_reg(USB2_RCV);
236 /* there is no USB2_SPEED */
237 } else if (cpu_is_omap16xx()) {
238 omap_cfg_reg(V6_USB2_TXD);
239 omap_cfg_reg(W9_USB2_TXEN);
240 omap_cfg_reg(W5_USB2_SE0);
241 if (nwires != 3)
242 omap_cfg_reg(Y5_USB2_RCV);
243 // FIXME omap_cfg_reg(USB2_SPEED);
244 } else {
245 pr_debug("usb unrecognized\n");
246 }
247 // omap_cfg_reg(USB2_SUSP);
248
249 switch (nwires) {
250 case 3:
251 syscon1 = 2;
252 break;
253 case 4:
254 syscon1 = 1;
255 break;
256 case 6:
257 syscon1 = 3;
258 if (cpu_is_omap15xx()) {
259 omap_cfg_reg(USB2_VP);
260 omap_cfg_reg(USB2_VM);
261 } else {
262 omap_cfg_reg(AA9_USB2_VP);
263 omap_cfg_reg(R9_USB2_VM);
264 USB_TRANSCEIVER_CTRL_REG |= CONF_USB2_UNI_R;
265 }
266 break;
267 default:
268 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
269 2, nwires);
270 }
271 return syscon1 << 24;
272 }
273
274 /*-------------------------------------------------------------------------*/
275
276 #if defined(CONFIG_USB_GADGET_OMAP) || \
277 defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE) || \
278 (defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG))
279 static void usb_release(struct device *dev)
280 {
281 /* normally not freed */
282 }
283 #endif
284
285 #ifdef CONFIG_USB_GADGET_OMAP
286
287 static struct resource udc_resources[] = {
288 /* order is significant! */
289 { /* registers */
290 .start = UDC_BASE,
291 .end = UDC_BASE + 0xff,
292 .flags = IORESOURCE_MEM,
293 }, { /* general IRQ */
294 .start = IH2_BASE + 20,
295 .flags = IORESOURCE_IRQ,
296 }, { /* PIO IRQ */
297 .start = IH2_BASE + 30,
298 .flags = IORESOURCE_IRQ,
299 }, { /* SOF IRQ */
300 .start = IH2_BASE + 29,
301 .flags = IORESOURCE_IRQ,
302 },
303 };
304
305 static u64 udc_dmamask = ~(u32)0;
306
307 static struct platform_device udc_device = {
308 .name = "omap_udc",
309 .id = -1,
310 .dev = {
311 .release = usb_release,
312 .dma_mask = &udc_dmamask,
313 .coherent_dma_mask = 0xffffffff,
314 },
315 .num_resources = ARRAY_SIZE(udc_resources),
316 .resource = udc_resources,
317 };
318
319 #endif
320
321 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
322
323 /* The dmamask must be set for OHCI to work */
324 static u64 ohci_dmamask = ~(u32)0;
325
326 static struct resource ohci_resources[] = {
327 {
328 .start = OMAP_OHCI_BASE,
329 .end = OMAP_OHCI_BASE + 4096,
330 .flags = IORESOURCE_MEM,
331 },
332 {
333 .start = INT_USB_HHC_1,
334 .flags = IORESOURCE_IRQ,
335 },
336 };
337
338 static struct platform_device ohci_device = {
339 .name = "ohci",
340 .id = -1,
341 .dev = {
342 .release = usb_release,
343 .dma_mask = &ohci_dmamask,
344 .coherent_dma_mask = 0xffffffff,
345 },
346 .num_resources = ARRAY_SIZE(ohci_resources),
347 .resource = ohci_resources,
348 };
349
350 #endif
351
352 #if defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
353
354 static struct resource otg_resources[] = {
355 /* order is significant! */
356 {
357 .start = OTG_BASE,
358 .end = OTG_BASE + 0xff,
359 .flags = IORESOURCE_MEM,
360 }, {
361 .start = IH2_BASE + 8,
362 .flags = IORESOURCE_IRQ,
363 },
364 };
365
366 static struct platform_device otg_device = {
367 .name = "omap_otg",
368 .id = -1,
369 .dev = {
370 .release = usb_release,
371 },
372 .num_resources = ARRAY_SIZE(otg_resources),
373 .resource = otg_resources,
374 };
375
376 #endif
377
378 /*-------------------------------------------------------------------------*/
379
380 #define ULPD_CLOCK_CTRL_REG __REG16(ULPD_CLOCK_CTRL)
381 #define ULPD_SOFT_REQ_REG __REG16(ULPD_SOFT_REQ)
382
383
384 // FIXME correct answer depends on hmc_mode,
385 // as does any nonzero value for config->otg port number
386 #ifdef CONFIG_USB_GADGET_OMAP
387 #define is_usb0_device(config) 1
388 #else
389 #define is_usb0_device(config) 0
390 #endif
391
392 /*-------------------------------------------------------------------------*/
393
394 #ifdef CONFIG_ARCH_OMAP_OTG
395
396 void __init
397 omap_otg_init(struct omap_usb_config *config)
398 {
399 u32 syscon = OTG_SYSCON_1_REG & 0xffff;
400 int status;
401 int alt_pingroup = 0;
402
403 /* NOTE: no bus or clock setup (yet?) */
404
405 syscon = OTG_SYSCON_1_REG & 0xffff;
406 if (!(syscon & OTG_RESET_DONE))
407 pr_debug("USB resets not complete?\n");
408
409 // OTG_IRQ_EN_REG = 0;
410
411 /* pin muxing and transceiver pinouts */
412 if (config->pins[0] > 2) /* alt pingroup 2 */
413 alt_pingroup = 1;
414 syscon |= omap_usb0_init(config->pins[0], is_usb0_device(config));
415 syscon |= omap_usb1_init(config->pins[1]);
416 syscon |= omap_usb2_init(config->pins[2], alt_pingroup);
417 pr_debug("OTG_SYSCON_1_REG = %08x\n", syscon);
418 OTG_SYSCON_1_REG = syscon;
419
420 syscon = config->hmc_mode;
421 syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
422 #ifdef CONFIG_USB_OTG
423 if (config->otg)
424 syscon |= OTG_EN;
425 #endif
426 pr_debug("USB_TRANSCEIVER_CTRL_REG = %03x\n", USB_TRANSCEIVER_CTRL_REG);
427 pr_debug("OTG_SYSCON_2_REG = %08x\n", syscon);
428 OTG_SYSCON_2_REG = syscon;
429
430 printk("USB: hmc %d", config->hmc_mode);
431 if (alt_pingroup)
432 printk(", usb2 alt %d wires", config->pins[2]);
433 else if (config->pins[0])
434 printk(", usb0 %d wires%s", config->pins[0],
435 is_usb0_device(config) ? " (dev)" : "");
436 if (config->pins[1])
437 printk(", usb1 %d wires", config->pins[1]);
438 if (!alt_pingroup && config->pins[2])
439 printk(", usb2 %d wires", config->pins[2]);
440 if (config->otg)
441 printk(", Mini-AB on usb%d", config->otg - 1);
442 printk("\n");
443
444 /* leave USB clocks/controllers off until needed */
445 ULPD_SOFT_REQ_REG &= ~SOFT_USB_CLK_REQ;
446 ULPD_CLOCK_CTRL_REG &= ~USB_MCLK_EN;
447 ULPD_CLOCK_CTRL_REG |= DIS_USB_PVCI_CLK;
448 syscon = OTG_SYSCON_1_REG;
449 syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
450
451 #ifdef CONFIG_USB_GADGET_OMAP
452 if (config->otg || config->register_dev) {
453 syscon &= ~DEV_IDLE_EN;
454 udc_device.dev.platform_data = config;
455 /* FIXME patch IRQ numbers for omap730 */
456 status = platform_device_register(&udc_device);
457 if (status)
458 pr_debug("can't register UDC device, %d\n", status);
459 }
460 #endif
461
462 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
463 if (config->otg || config->register_host) {
464 syscon &= ~HST_IDLE_EN;
465 ohci_device.dev.platform_data = config;
466 if (cpu_is_omap730())
467 ohci_resources[1].start = INT_730_USB_HHC_1;
468 status = platform_device_register(&ohci_device);
469 if (status)
470 pr_debug("can't register OHCI device, %d\n", status);
471 }
472 #endif
473
474 #ifdef CONFIG_USB_OTG
475 if (config->otg) {
476 syscon &= ~OTG_IDLE_EN;
477 otg_device.dev.platform_data = config;
478 if (cpu_is_omap730())
479 otg_resources[1].start = INT_730_USB_OTG;
480 status = platform_device_register(&otg_device);
481 if (status)
482 pr_debug("can't register OTG device, %d\n", status);
483 }
484 #endif
485 pr_debug("OTG_SYSCON_1_REG = %08x\n", syscon);
486 OTG_SYSCON_1_REG = syscon;
487
488 status = 0;
489 }
490
491 #else
492 static inline void omap_otg_init(struct omap_usb_config *config) {}
493 #endif
494
495 /*-------------------------------------------------------------------------*/
496
497 #ifdef CONFIG_ARCH_OMAP1510
498
499 #define ULPD_DPLL_CTRL_REG __REG16(ULPD_DPLL_CTRL)
500 #define DPLL_IOB (1 << 13)
501 #define DPLL_PLL_ENABLE (1 << 4)
502 #define DPLL_LOCK (1 << 0)
503
504 #define ULPD_APLL_CTRL_REG __REG16(ULPD_APLL_CTRL)
505 #define APLL_NDPLL_SWITCH (1 << 0)
506
507
508 static void __init omap_1510_usb_init(struct omap_usb_config *config)
509 {
510 int status;
511 unsigned int val;
512
513 omap_usb0_init(config->pins[0], is_usb0_device(config));
514 omap_usb1_init(config->pins[1]);
515 omap_usb2_init(config->pins[2], 0);
516
517 val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
518 val |= (config->hmc_mode << 1);
519 omap_writel(val, MOD_CONF_CTRL_0);
520
521 printk("USB: hmc %d", config->hmc_mode);
522 if (config->pins[0])
523 printk(", usb0 %d wires%s", config->pins[0],
524 is_usb0_device(config) ? " (dev)" : "");
525 if (config->pins[1])
526 printk(", usb1 %d wires", config->pins[1]);
527 if (config->pins[2])
528 printk(", usb2 %d wires", config->pins[2]);
529 printk("\n");
530
531 /* use DPLL for 48 MHz function clock */
532 pr_debug("APLL %04x DPLL %04x REQ %04x\n", ULPD_APLL_CTRL_REG,
533 ULPD_DPLL_CTRL_REG, ULPD_SOFT_REQ_REG);
534 ULPD_APLL_CTRL_REG &= ~APLL_NDPLL_SWITCH;
535 ULPD_DPLL_CTRL_REG |= DPLL_IOB | DPLL_PLL_ENABLE;
536 ULPD_SOFT_REQ_REG |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
537 while (!(ULPD_DPLL_CTRL_REG & DPLL_LOCK))
538 cpu_relax();
539
540 #ifdef CONFIG_USB_GADGET_OMAP
541 if (config->register_dev) {
542 udc_device.dev.platform_data = config;
543 status = platform_device_register(&udc_device);
544 if (status)
545 pr_debug("can't register UDC device, %d\n", status);
546 /* udc driver gates 48MHz by D+ pullup */
547 }
548 #endif
549
550 #if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
551 if (config->register_host) {
552 ohci_device.dev.platform_data = config;
553 status = platform_device_register(&ohci_device);
554 if (status)
555 pr_debug("can't register OHCI device, %d\n", status);
556 /* hcd explicitly gates 48MHz */
557 }
558 #endif
559 }
560
561 #else
562 static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
563 #endif
564
565 /*-------------------------------------------------------------------------*/
566
567 static struct omap_usb_config platform_data;
568
569 static int __init
570 omap_usb_init(void)
571 {
572 const struct omap_usb_config *config;
573
574 config = omap_get_config(OMAP_TAG_USB, struct omap_usb_config);
575 if (config == NULL) {
576 printk(KERN_ERR "USB: No board-specific "
577 "platform config found\n");
578 return -ENODEV;
579 }
580 platform_data = *config;
581
582 if (cpu_is_omap730() || cpu_is_omap16xx())
583 omap_otg_init(&platform_data);
584 else if (cpu_is_omap15xx())
585 omap_1510_usb_init(&platform_data);
586 else {
587 printk(KERN_ERR "USB: No init for your chip yet\n");
588 return -ENODEV;
589 }
590 return 0;
591 }
592
593 subsys_initcall(omap_usb_init);
Linux kernel - Deliverables
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