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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-omap1/usb.c

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  1 /*
  2  * Platform level USB initialization for FS USB OTG controller on omap1 and 24xx
  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 void __init
 62 omap_otg_init(struct omap_usb_config *config)
 63 {
 64         u32             syscon;
 65         int             alt_pingroup = 0;
 66 
 67         /* NOTE:  no bus or clock setup (yet?) */
 68 
 69         syscon = omap_readl(OTG_SYSCON_1) & 0xffff;
 70         if (!(syscon & OTG_RESET_DONE))
 71                 pr_debug("USB resets not complete?\n");
 72 
 73         //omap_writew(0, OTG_IRQ_EN);
 74 
 75         /* pin muxing and transceiver pinouts */
 76         if (config->pins[0] > 2)        /* alt pingroup 2 */
 77                 alt_pingroup = 1;
 78         syscon |= config->usb0_init(config->pins[0], is_usb0_device(config));
 79         syscon |= config->usb1_init(config->pins[1]);
 80         syscon |= config->usb2_init(config->pins[2], alt_pingroup);
 81         pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
 82         omap_writel(syscon, OTG_SYSCON_1);
 83 
 84         syscon = config->hmc_mode;
 85         syscon |= USBX_SYNCHRO | (4 << 16) /* B_ASE0_BRST */;
 86 #ifdef  CONFIG_USB_OTG
 87         if (config->otg)
 88                 syscon |= OTG_EN;
 89 #endif
 90         if (cpu_class_is_omap1())
 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                 printk(", usb2 alt %d wires", config->pins[2]);
 99         else if (config->pins[0])
100                 printk(", usb0 %d wires%s", config->pins[0],
101                         is_usb0_device(config) ? " (dev)" : "");
102         if (config->pins[1])
103                 printk(", usb1 %d wires", config->pins[1]);
104         if (!alt_pingroup && config->pins[2])
105                 printk(", usb2 %d wires", config->pins[2]);
106         if (config->otg)
107                 printk(", Mini-AB on usb%d", config->otg - 1);
108         printk("\n");
109 
110         if (cpu_class_is_omap1()) {
111                 u16 w;
112 
113                 /* leave USB clocks/controllers off until needed */
114                 w = omap_readw(ULPD_SOFT_REQ);
115                 w &= ~SOFT_USB_CLK_REQ;
116                 omap_writew(w, ULPD_SOFT_REQ);
117 
118                 w = omap_readw(ULPD_CLOCK_CTRL);
119                 w &= ~USB_MCLK_EN;
120                 w |= DIS_USB_PVCI_CLK;
121                 omap_writew(w, ULPD_CLOCK_CTRL);
122         }
123         syscon = omap_readl(OTG_SYSCON_1);
124         syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
125 
126 #if IS_ENABLED(CONFIG_USB_OMAP)
127         if (config->otg || config->register_dev) {
128                 struct platform_device *udc_device = config->udc_device;
129                 int status;
130 
131                 syscon &= ~DEV_IDLE_EN;
132                 udc_device->dev.platform_data = config;
133                 status = platform_device_register(udc_device);
134                 if (status)
135                         pr_debug("can't register UDC device, %d\n", status);
136         }
137 #endif
138 
139 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
140         if (config->otg || config->register_host) {
141                 struct platform_device *ohci_device = config->ohci_device;
142                 int status;
143 
144                 syscon &= ~HST_IDLE_EN;
145                 ohci_device->dev.platform_data = config;
146                 status = platform_device_register(ohci_device);
147                 if (status)
148                         pr_debug("can't register OHCI device, %d\n", status);
149         }
150 #endif
151 
152 #ifdef  CONFIG_USB_OTG
153         if (config->otg) {
154                 struct platform_device *otg_device = config->otg_device;
155                 int status;
156 
157                 syscon &= ~OTG_IDLE_EN;
158                 otg_device->dev.platform_data = config;
159                 status = platform_device_register(otg_device);
160                 if (status)
161                         pr_debug("can't register OTG device, %d\n", status);
162         }
163 #endif
164         pr_debug("OTG_SYSCON_1 = %08x\n", omap_readl(OTG_SYSCON_1));
165         omap_writel(syscon, OTG_SYSCON_1);
166 }
167 
168 #else
169 void omap_otg_init(struct omap_usb_config *config) {}
170 #endif
171 
172 #if IS_ENABLED(CONFIG_USB_OMAP)
173 
174 static struct resource udc_resources[] = {
175         /* order is significant! */
176         {               /* registers */
177                 .start          = UDC_BASE,
178                 .end            = UDC_BASE + 0xff,
179                 .flags          = IORESOURCE_MEM,
180         }, {            /* general IRQ */
181                 .start          = INT_USB_IRQ_GEN,
182                 .flags          = IORESOURCE_IRQ,
183         }, {            /* PIO IRQ */
184                 .start          = INT_USB_IRQ_NISO,
185                 .flags          = IORESOURCE_IRQ,
186         }, {            /* SOF IRQ */
187                 .start          = INT_USB_IRQ_ISO,
188                 .flags          = IORESOURCE_IRQ,
189         },
190 };
191 
192 static u64 udc_dmamask = ~(u32)0;
193 
194 static struct platform_device udc_device = {
195         .name           = "omap_udc",
196         .id             = -1,
197         .dev = {
198                 .dma_mask               = &udc_dmamask,
199                 .coherent_dma_mask      = 0xffffffff,
200         },
201         .num_resources  = ARRAY_SIZE(udc_resources),
202         .resource       = udc_resources,
203 };
204 
205 static inline void udc_device_init(struct omap_usb_config *pdata)
206 {
207         /* IRQ numbers for omap7xx */
208         if(cpu_is_omap7xx()) {
209                 udc_resources[1].start = INT_7XX_USB_GENI;
210                 udc_resources[2].start = INT_7XX_USB_NON_ISO;
211                 udc_resources[3].start = INT_7XX_USB_ISO;
212         }
213         pdata->udc_device = &udc_device;
214 }
215 
216 #else
217 
218 static inline void udc_device_init(struct omap_usb_config *pdata)
219 {
220 }
221 
222 #endif
223 
224 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
225 
226 /* The dmamask must be set for OHCI to work */
227 static u64 ohci_dmamask = ~(u32)0;
228 
229 static struct resource ohci_resources[] = {
230         {
231                 .start  = OMAP_OHCI_BASE,
232                 .end    = OMAP_OHCI_BASE + 0xff,
233                 .flags  = IORESOURCE_MEM,
234         },
235         {
236                 .start  = INT_USB_IRQ_HGEN,
237                 .flags  = IORESOURCE_IRQ,
238         },
239 };
240 
241 static struct platform_device ohci_device = {
242         .name                   = "ohci",
243         .id                     = -1,
244         .dev = {
245                 .dma_mask               = &ohci_dmamask,
246                 .coherent_dma_mask      = 0xffffffff,
247         },
248         .num_resources  = ARRAY_SIZE(ohci_resources),
249         .resource               = ohci_resources,
250 };
251 
252 static inline void ohci_device_init(struct omap_usb_config *pdata)
253 {
254         if (cpu_is_omap7xx())
255                 ohci_resources[1].start = INT_7XX_USB_HHC_1;
256         pdata->ohci_device = &ohci_device;
257         pdata->ocpi_enable = &ocpi_enable;
258 }
259 
260 #else
261 
262 static inline void ohci_device_init(struct omap_usb_config *pdata)
263 {
264 }
265 
266 #endif
267 
268 #if     defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
269 
270 static struct resource otg_resources[] = {
271         /* order is significant! */
272         {
273                 .start          = OTG_BASE,
274                 .end            = OTG_BASE + 0xff,
275                 .flags          = IORESOURCE_MEM,
276         }, {
277                 .start          = INT_USB_IRQ_OTG,
278                 .flags          = IORESOURCE_IRQ,
279         },
280 };
281 
282 static struct platform_device otg_device = {
283         .name           = "omap_otg",
284         .id             = -1,
285         .num_resources  = ARRAY_SIZE(otg_resources),
286         .resource       = otg_resources,
287 };
288 
289 static inline void otg_device_init(struct omap_usb_config *pdata)
290 {
291         if (cpu_is_omap7xx())
292                 otg_resources[1].start = INT_7XX_USB_OTG;
293         pdata->otg_device = &otg_device;
294 }
295 
296 #else
297 
298 static inline void otg_device_init(struct omap_usb_config *pdata)
299 {
300 }
301 
302 #endif
303 
304 static u32 __init omap1_usb0_init(unsigned nwires, unsigned is_device)
305 {
306         u32     syscon1 = 0;
307 
308         if (nwires == 0) {
309                 if (!cpu_is_omap15xx()) {
310                         u32 l;
311 
312                         /* pulldown D+/D- */
313                         l = omap_readl(USB_TRANSCEIVER_CTRL);
314                         l &= ~(3 << 1);
315                         omap_writel(l, USB_TRANSCEIVER_CTRL);
316                 }
317                 return 0;
318         }
319 
320         if (is_device) {
321                 if (cpu_is_omap7xx()) {
322                         omap_cfg_reg(AA17_7XX_USB_DM);
323                         omap_cfg_reg(W16_7XX_USB_PU_EN);
324                         omap_cfg_reg(W17_7XX_USB_VBUSI);
325                         omap_cfg_reg(W18_7XX_USB_DMCK_OUT);
326                         omap_cfg_reg(W19_7XX_USB_DCRST);
327                 } else
328                         omap_cfg_reg(W4_USB_PUEN);
329         }
330 
331         if (nwires == 2) {
332                 u32 l;
333 
334                 // omap_cfg_reg(P9_USB_DP);
335                 // omap_cfg_reg(R8_USB_DM);
336 
337                 if (cpu_is_omap15xx()) {
338                         /* This works on 1510-Innovator */
339                         return 0;
340                 }
341 
342                 /* NOTES:
343                  *  - peripheral should configure VBUS detection!
344                  *  - only peripherals may use the internal D+/D- pulldowns
345                  *  - OTG support on this port not yet written
346                  */
347 
348                 /* Don't do this for omap7xx -- it causes USB to not work correctly */
349                 if (!cpu_is_omap7xx()) {
350                         l = omap_readl(USB_TRANSCEIVER_CTRL);
351                         l &= ~(7 << 4);
352                         if (!is_device)
353                                 l |= (3 << 1);
354                         omap_writel(l, USB_TRANSCEIVER_CTRL);
355                 }
356 
357                 return 3 << 16;
358         }
359 
360         /* alternate pin config, external transceiver */
361         if (cpu_is_omap15xx()) {
362                 printk(KERN_ERR "no usb0 alt pin config on 15xx\n");
363                 return 0;
364         }
365 
366         omap_cfg_reg(V6_USB0_TXD);
367         omap_cfg_reg(W9_USB0_TXEN);
368         omap_cfg_reg(W5_USB0_SE0);
369         if (nwires != 3)
370                 omap_cfg_reg(Y5_USB0_RCV);
371 
372         /* NOTE:  SPEED and SUSP aren't configured here.  OTG hosts
373          * may be able to use I2C requests to set those bits along
374          * with VBUS switching and overcurrent detection.
375          */
376 
377         if (nwires != 6) {
378                 u32 l;
379 
380                 l = omap_readl(USB_TRANSCEIVER_CTRL);
381                 l &= ~CONF_USB2_UNI_R;
382                 omap_writel(l, USB_TRANSCEIVER_CTRL);
383         }
384 
385         switch (nwires) {
386         case 3:
387                 syscon1 = 2;
388                 break;
389         case 4:
390                 syscon1 = 1;
391                 break;
392         case 6:
393                 syscon1 = 3;
394                 {
395                         u32 l;
396 
397                         omap_cfg_reg(AA9_USB0_VP);
398                         omap_cfg_reg(R9_USB0_VM);
399                         l = omap_readl(USB_TRANSCEIVER_CTRL);
400                         l |= CONF_USB2_UNI_R;
401                         omap_writel(l, USB_TRANSCEIVER_CTRL);
402                 }
403                 break;
404         default:
405                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
406                         0, nwires);
407         }
408 
409         return syscon1 << 16;
410 }
411 
412 static u32 __init omap1_usb1_init(unsigned nwires)
413 {
414         u32     syscon1 = 0;
415 
416         if (!cpu_is_omap15xx() && nwires != 6) {
417                 u32 l;
418 
419                 l = omap_readl(USB_TRANSCEIVER_CTRL);
420                 l &= ~CONF_USB1_UNI_R;
421                 omap_writel(l, USB_TRANSCEIVER_CTRL);
422         }
423         if (nwires == 0)
424                 return 0;
425 
426         /* external transceiver */
427         omap_cfg_reg(USB1_TXD);
428         omap_cfg_reg(USB1_TXEN);
429         if (nwires != 3)
430                 omap_cfg_reg(USB1_RCV);
431 
432         if (cpu_is_omap15xx()) {
433                 omap_cfg_reg(USB1_SEO);
434                 omap_cfg_reg(USB1_SPEED);
435                 // SUSP
436         } else if (cpu_is_omap1610() || cpu_is_omap5912()) {
437                 omap_cfg_reg(W13_1610_USB1_SE0);
438                 omap_cfg_reg(R13_1610_USB1_SPEED);
439                 // SUSP
440         } else if (cpu_is_omap1710()) {
441                 omap_cfg_reg(R13_1710_USB1_SE0);
442                 // SUSP
443         } else {
444                 pr_debug("usb%d cpu unrecognized\n", 1);
445                 return 0;
446         }
447 
448         switch (nwires) {
449         case 2:
450                 goto bad;
451         case 3:
452                 syscon1 = 2;
453                 break;
454         case 4:
455                 syscon1 = 1;
456                 break;
457         case 6:
458                 syscon1 = 3;
459                 omap_cfg_reg(USB1_VP);
460                 omap_cfg_reg(USB1_VM);
461                 if (!cpu_is_omap15xx()) {
462                         u32 l;
463 
464                         l = omap_readl(USB_TRANSCEIVER_CTRL);
465                         l |= CONF_USB1_UNI_R;
466                         omap_writel(l, USB_TRANSCEIVER_CTRL);
467                 }
468                 break;
469         default:
470 bad:
471                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
472                         1, nwires);
473         }
474 
475         return syscon1 << 20;
476 }
477 
478 static u32 __init omap1_usb2_init(unsigned nwires, unsigned alt_pingroup)
479 {
480         u32     syscon1 = 0;
481 
482         /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
483         if (alt_pingroup || nwires == 0)
484                 return 0;
485 
486         if (!cpu_is_omap15xx() && nwires != 6) {
487                 u32 l;
488 
489                 l = omap_readl(USB_TRANSCEIVER_CTRL);
490                 l &= ~CONF_USB2_UNI_R;
491                 omap_writel(l, USB_TRANSCEIVER_CTRL);
492         }
493 
494         /* external transceiver */
495         if (cpu_is_omap15xx()) {
496                 omap_cfg_reg(USB2_TXD);
497                 omap_cfg_reg(USB2_TXEN);
498                 omap_cfg_reg(USB2_SEO);
499                 if (nwires != 3)
500                         omap_cfg_reg(USB2_RCV);
501                 /* there is no USB2_SPEED */
502         } else if (cpu_is_omap16xx()) {
503                 omap_cfg_reg(V6_USB2_TXD);
504                 omap_cfg_reg(W9_USB2_TXEN);
505                 omap_cfg_reg(W5_USB2_SE0);
506                 if (nwires != 3)
507                         omap_cfg_reg(Y5_USB2_RCV);
508                 // FIXME omap_cfg_reg(USB2_SPEED);
509         } else {
510                 pr_debug("usb%d cpu unrecognized\n", 1);
511                 return 0;
512         }
513 
514         // omap_cfg_reg(USB2_SUSP);
515 
516         switch (nwires) {
517         case 2:
518                 goto bad;
519         case 3:
520                 syscon1 = 2;
521                 break;
522         case 4:
523                 syscon1 = 1;
524                 break;
525         case 5:
526                 goto bad;
527         case 6:
528                 syscon1 = 3;
529                 if (cpu_is_omap15xx()) {
530                         omap_cfg_reg(USB2_VP);
531                         omap_cfg_reg(USB2_VM);
532                 } else {
533                         u32 l;
534 
535                         omap_cfg_reg(AA9_USB2_VP);
536                         omap_cfg_reg(R9_USB2_VM);
537                         l = omap_readl(USB_TRANSCEIVER_CTRL);
538                         l |= CONF_USB2_UNI_R;
539                         omap_writel(l, USB_TRANSCEIVER_CTRL);
540                 }
541                 break;
542         default:
543 bad:
544                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
545                         2, nwires);
546         }
547 
548         return syscon1 << 24;
549 }
550 
551 #ifdef  CONFIG_ARCH_OMAP15XX
552 
553 /* ULPD_DPLL_CTRL */
554 #define DPLL_IOB                (1 << 13)
555 #define DPLL_PLL_ENABLE         (1 << 4)
556 #define DPLL_LOCK               (1 << 0)
557 
558 /* ULPD_APLL_CTRL */
559 #define APLL_NDPLL_SWITCH       (1 << 0)
560 
561 static void __init omap_1510_usb_init(struct omap_usb_config *config)
562 {
563         unsigned int val;
564         u16 w;
565 
566         config->usb0_init(config->pins[0], is_usb0_device(config));
567         config->usb1_init(config->pins[1]);
568         config->usb2_init(config->pins[2], 0);
569 
570         val = omap_readl(MOD_CONF_CTRL_0) & ~(0x3f << 1);
571         val |= (config->hmc_mode << 1);
572         omap_writel(val, MOD_CONF_CTRL_0);
573 
574         printk("USB: hmc %d", config->hmc_mode);
575         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 (config->pins[2])
581                 printk(", usb2 %d wires", config->pins[2]);
582         printk("\n");
583 
584         /* use DPLL for 48 MHz function clock */
585         pr_debug("APLL %04x DPLL %04x REQ %04x\n", omap_readw(ULPD_APLL_CTRL),
586                         omap_readw(ULPD_DPLL_CTRL), omap_readw(ULPD_SOFT_REQ));
587 
588         w = omap_readw(ULPD_APLL_CTRL);
589         w &= ~APLL_NDPLL_SWITCH;
590         omap_writew(w, ULPD_APLL_CTRL);
591 
592         w = omap_readw(ULPD_DPLL_CTRL);
593         w |= DPLL_IOB | DPLL_PLL_ENABLE;
594         omap_writew(w, ULPD_DPLL_CTRL);
595 
596         w = omap_readw(ULPD_SOFT_REQ);
597         w |= SOFT_UDC_REQ | SOFT_DPLL_REQ;
598         omap_writew(w, ULPD_SOFT_REQ);
599 
600         while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
601                 cpu_relax();
602 
603 #if IS_ENABLED(CONFIG_USB_OMAP)
604         if (config->register_dev) {
605                 int status;
606 
607                 udc_device.dev.platform_data = config;
608                 status = platform_device_register(&udc_device);
609                 if (status)
610                         pr_debug("can't register UDC device, %d\n", status);
611                 /* udc driver gates 48MHz by D+ pullup */
612         }
613 #endif
614 
615 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
616         if (config->register_host) {
617                 int status;
618 
619                 ohci_device.dev.platform_data = config;
620                 status = platform_device_register(&ohci_device);
621                 if (status)
622                         pr_debug("can't register OHCI device, %d\n", status);
623                 /* hcd explicitly gates 48MHz */
624         }
625 #endif
626 }
627 
628 #else
629 static inline void omap_1510_usb_init(struct omap_usb_config *config) {}
630 #endif
631 
632 void __init omap1_usb_init(struct omap_usb_config *_pdata)
633 {
634         struct omap_usb_config *pdata;
635 
636         pdata = kmemdup(_pdata, sizeof(*pdata), GFP_KERNEL);
637         if (!pdata)
638                 return;
639 
640         pdata->usb0_init = omap1_usb0_init;
641         pdata->usb1_init = omap1_usb1_init;
642         pdata->usb2_init = omap1_usb2_init;
643         udc_device_init(pdata);
644         ohci_device_init(pdata);
645         otg_device_init(pdata);
646 
647         if (cpu_is_omap7xx() || cpu_is_omap16xx())
648                 omap_otg_init(pdata);
649         else if (cpu_is_omap15xx())
650                 omap_1510_usb_init(pdata);
651         else
652                 printk(KERN_ERR "USB: No init for your chip yet\n");
653 }
654 

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