musb_dsps.c revision 40f099e32c2a06bad7d75683421e30fcc74924cd
1/* 2 * Texas Instruments DSPS platforms "glue layer" 3 * 4 * Copyright (C) 2012, by Texas Instruments 5 * 6 * Based on the am35x "glue layer" code. 7 * 8 * This file is part of the Inventra Controller Driver for Linux. 9 * 10 * The Inventra Controller Driver for Linux is free software; you 11 * can redistribute it and/or modify it under the terms of the GNU 12 * General Public License version 2 as published by the Free Software 13 * Foundation. 14 * 15 * The Inventra Controller Driver for Linux is distributed in 16 * the hope that it will be useful, but WITHOUT ANY WARRANTY; 17 * without even the implied warranty of MERCHANTABILITY or 18 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 19 * License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with The Inventra Controller Driver for Linux ; if not, 23 * write to the Free Software Foundation, Inc., 59 Temple Place, 24 * Suite 330, Boston, MA 02111-1307 USA 25 * 26 * musb_dsps.c will be a common file for all the TI DSPS platforms 27 * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x. 28 * For now only ti81x is using this and in future davinci.c, am35x.c 29 * da8xx.c would be merged to this file after testing. 30 */ 31 32#include <linux/io.h> 33#include <linux/err.h> 34#include <linux/platform_device.h> 35#include <linux/dma-mapping.h> 36#include <linux/pm_runtime.h> 37#include <linux/module.h> 38#include <linux/usb/usb_phy_gen_xceiv.h> 39#include <linux/platform_data/usb-omap.h> 40#include <linux/sizes.h> 41 42#include <linux/of.h> 43#include <linux/of_device.h> 44#include <linux/of_address.h> 45#include <linux/of_irq.h> 46#include <linux/usb/of.h> 47 48#include <linux/debugfs.h> 49 50#include "musb_core.h" 51 52static const struct of_device_id musb_dsps_of_match[]; 53 54/** 55 * avoid using musb_readx()/musb_writex() as glue layer should not be 56 * dependent on musb core layer symbols. 57 */ 58static inline u8 dsps_readb(const void __iomem *addr, unsigned offset) 59 { return __raw_readb(addr + offset); } 60 61static inline u32 dsps_readl(const void __iomem *addr, unsigned offset) 62 { return __raw_readl(addr + offset); } 63 64static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data) 65 { __raw_writeb(data, addr + offset); } 66 67static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data) 68 { __raw_writel(data, addr + offset); } 69 70/** 71 * DSPS musb wrapper register offset. 72 * FIXME: This should be expanded to have all the wrapper registers from TI DSPS 73 * musb ips. 74 */ 75struct dsps_musb_wrapper { 76 u16 revision; 77 u16 control; 78 u16 status; 79 u16 epintr_set; 80 u16 epintr_clear; 81 u16 epintr_status; 82 u16 coreintr_set; 83 u16 coreintr_clear; 84 u16 coreintr_status; 85 u16 phy_utmi; 86 u16 mode; 87 u16 tx_mode; 88 u16 rx_mode; 89 90 /* bit positions for control */ 91 unsigned reset:5; 92 93 /* bit positions for interrupt */ 94 unsigned usb_shift:5; 95 u32 usb_mask; 96 u32 usb_bitmap; 97 unsigned drvvbus:5; 98 99 unsigned txep_shift:5; 100 u32 txep_mask; 101 u32 txep_bitmap; 102 103 unsigned rxep_shift:5; 104 u32 rxep_mask; 105 u32 rxep_bitmap; 106 107 /* bit positions for phy_utmi */ 108 unsigned otg_disable:5; 109 110 /* bit positions for mode */ 111 unsigned iddig:5; 112 unsigned iddig_mux:5; 113 /* miscellaneous stuff */ 114 u8 poll_seconds; 115}; 116 117/* 118 * register shadow for suspend 119 */ 120struct dsps_context { 121 u32 control; 122 u32 epintr; 123 u32 coreintr; 124 u32 phy_utmi; 125 u32 mode; 126 u32 tx_mode; 127 u32 rx_mode; 128}; 129 130/** 131 * DSPS glue structure. 132 */ 133struct dsps_glue { 134 struct device *dev; 135 struct platform_device *musb; /* child musb pdev */ 136 const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */ 137 struct timer_list timer; /* otg_workaround timer */ 138 unsigned long last_timer; /* last timer data for each instance */ 139 140 struct dsps_context context; 141 struct debugfs_regset32 regset; 142 struct dentry *dbgfs_root; 143}; 144 145static const struct debugfs_reg32 dsps_musb_regs[] = { 146 { "revision", 0x00 }, 147 { "control", 0x14 }, 148 { "status", 0x18 }, 149 { "eoi", 0x24 }, 150 { "intr0_stat", 0x30 }, 151 { "intr1_stat", 0x34 }, 152 { "intr0_set", 0x38 }, 153 { "intr1_set", 0x3c }, 154 { "txmode", 0x70 }, 155 { "rxmode", 0x74 }, 156 { "autoreq", 0xd0 }, 157 { "srpfixtime", 0xd4 }, 158 { "tdown", 0xd8 }, 159 { "phy_utmi", 0xe0 }, 160 { "mode", 0xe8 }, 161}; 162 163static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout) 164{ 165 struct device *dev = musb->controller; 166 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 167 168 if (timeout == 0) 169 timeout = jiffies + msecs_to_jiffies(3); 170 171 /* Never idle if active, or when VBUS timeout is not set as host */ 172 if (musb->is_active || (musb->a_wait_bcon == 0 && 173 musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { 174 dev_dbg(musb->controller, "%s active, deleting timer\n", 175 usb_otg_state_string(musb->xceiv->state)); 176 del_timer(&glue->timer); 177 glue->last_timer = jiffies; 178 return; 179 } 180 if (musb->port_mode != MUSB_PORT_MODE_DUAL_ROLE) 181 return; 182 183 if (!musb->g.dev.driver) 184 return; 185 186 if (time_after(glue->last_timer, timeout) && 187 timer_pending(&glue->timer)) { 188 dev_dbg(musb->controller, 189 "Longer idle timer already pending, ignoring...\n"); 190 return; 191 } 192 glue->last_timer = timeout; 193 194 dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n", 195 usb_otg_state_string(musb->xceiv->state), 196 jiffies_to_msecs(timeout - jiffies)); 197 mod_timer(&glue->timer, timeout); 198} 199 200/** 201 * dsps_musb_enable - enable interrupts 202 */ 203static void dsps_musb_enable(struct musb *musb) 204{ 205 struct device *dev = musb->controller; 206 struct platform_device *pdev = to_platform_device(dev->parent); 207 struct dsps_glue *glue = platform_get_drvdata(pdev); 208 const struct dsps_musb_wrapper *wrp = glue->wrp; 209 void __iomem *reg_base = musb->ctrl_base; 210 u32 epmask, coremask; 211 212 /* Workaround: setup IRQs through both register sets. */ 213 epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) | 214 ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift); 215 coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF); 216 217 dsps_writel(reg_base, wrp->epintr_set, epmask); 218 dsps_writel(reg_base, wrp->coreintr_set, coremask); 219 /* Force the DRVVBUS IRQ so we can start polling for ID change. */ 220 dsps_writel(reg_base, wrp->coreintr_set, 221 (1 << wrp->drvvbus) << wrp->usb_shift); 222 dsps_musb_try_idle(musb, 0); 223} 224 225/** 226 * dsps_musb_disable - disable HDRC and flush interrupts 227 */ 228static void dsps_musb_disable(struct musb *musb) 229{ 230 struct device *dev = musb->controller; 231 struct platform_device *pdev = to_platform_device(dev->parent); 232 struct dsps_glue *glue = platform_get_drvdata(pdev); 233 const struct dsps_musb_wrapper *wrp = glue->wrp; 234 void __iomem *reg_base = musb->ctrl_base; 235 236 dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap); 237 dsps_writel(reg_base, wrp->epintr_clear, 238 wrp->txep_bitmap | wrp->rxep_bitmap); 239 dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); 240} 241 242static void otg_timer(unsigned long _musb) 243{ 244 struct musb *musb = (void *)_musb; 245 void __iomem *mregs = musb->mregs; 246 struct device *dev = musb->controller; 247 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 248 const struct dsps_musb_wrapper *wrp = glue->wrp; 249 u8 devctl; 250 unsigned long flags; 251 int skip_session = 0; 252 253 /* 254 * We poll because DSPS IP's won't expose several OTG-critical 255 * status change events (from the transceiver) otherwise. 256 */ 257 devctl = dsps_readb(mregs, MUSB_DEVCTL); 258 dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl, 259 usb_otg_state_string(musb->xceiv->state)); 260 261 spin_lock_irqsave(&musb->lock, flags); 262 switch (musb->xceiv->state) { 263 case OTG_STATE_A_WAIT_BCON: 264 dsps_writeb(musb->mregs, MUSB_DEVCTL, 0); 265 skip_session = 1; 266 /* fall */ 267 268 case OTG_STATE_A_IDLE: 269 case OTG_STATE_B_IDLE: 270 if (devctl & MUSB_DEVCTL_BDEVICE) { 271 musb->xceiv->state = OTG_STATE_B_IDLE; 272 MUSB_DEV_MODE(musb); 273 } else { 274 musb->xceiv->state = OTG_STATE_A_IDLE; 275 MUSB_HST_MODE(musb); 276 } 277 if (!(devctl & MUSB_DEVCTL_SESSION) && !skip_session) 278 dsps_writeb(mregs, MUSB_DEVCTL, MUSB_DEVCTL_SESSION); 279 mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ); 280 break; 281 case OTG_STATE_A_WAIT_VFALL: 282 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; 283 dsps_writel(musb->ctrl_base, wrp->coreintr_set, 284 MUSB_INTR_VBUSERROR << wrp->usb_shift); 285 break; 286 default: 287 break; 288 } 289 spin_unlock_irqrestore(&musb->lock, flags); 290} 291 292static irqreturn_t dsps_interrupt(int irq, void *hci) 293{ 294 struct musb *musb = hci; 295 void __iomem *reg_base = musb->ctrl_base; 296 struct device *dev = musb->controller; 297 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 298 const struct dsps_musb_wrapper *wrp = glue->wrp; 299 unsigned long flags; 300 irqreturn_t ret = IRQ_NONE; 301 u32 epintr, usbintr; 302 303 spin_lock_irqsave(&musb->lock, flags); 304 305 /* Get endpoint interrupts */ 306 epintr = dsps_readl(reg_base, wrp->epintr_status); 307 musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift; 308 musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift; 309 310 if (epintr) 311 dsps_writel(reg_base, wrp->epintr_status, epintr); 312 313 /* Get usb core interrupts */ 314 usbintr = dsps_readl(reg_base, wrp->coreintr_status); 315 if (!usbintr && !epintr) 316 goto out; 317 318 musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift; 319 if (usbintr) 320 dsps_writel(reg_base, wrp->coreintr_status, usbintr); 321 322 dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n", 323 usbintr, epintr); 324 /* 325 * DRVVBUS IRQs are the only proxy we have (a very poor one!) for 326 * DSPS IP's missing ID change IRQ. We need an ID change IRQ to 327 * switch appropriately between halves of the OTG state machine. 328 * Managing DEVCTL.SESSION per Mentor docs requires that we know its 329 * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set. 330 * Also, DRVVBUS pulses for SRP (but not at 5V) ... 331 */ 332 if (is_host_active(musb) && usbintr & MUSB_INTR_BABBLE) 333 pr_info("CAUTION: musb: Babble Interrupt Occurred\n"); 334 335 if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) { 336 int drvvbus = dsps_readl(reg_base, wrp->status); 337 void __iomem *mregs = musb->mregs; 338 u8 devctl = dsps_readb(mregs, MUSB_DEVCTL); 339 int err; 340 341 err = musb->int_usb & MUSB_INTR_VBUSERROR; 342 if (err) { 343 /* 344 * The Mentor core doesn't debounce VBUS as needed 345 * to cope with device connect current spikes. This 346 * means it's not uncommon for bus-powered devices 347 * to get VBUS errors during enumeration. 348 * 349 * This is a workaround, but newer RTL from Mentor 350 * seems to allow a better one: "re"-starting sessions 351 * without waiting for VBUS to stop registering in 352 * devctl. 353 */ 354 musb->int_usb &= ~MUSB_INTR_VBUSERROR; 355 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL; 356 mod_timer(&glue->timer, 357 jiffies + wrp->poll_seconds * HZ); 358 WARNING("VBUS error workaround (delay coming)\n"); 359 } else if (drvvbus) { 360 MUSB_HST_MODE(musb); 361 musb->xceiv->otg->default_a = 1; 362 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE; 363 del_timer(&glue->timer); 364 } else { 365 musb->is_active = 0; 366 MUSB_DEV_MODE(musb); 367 musb->xceiv->otg->default_a = 0; 368 musb->xceiv->state = OTG_STATE_B_IDLE; 369 } 370 371 /* NOTE: this must complete power-on within 100 ms. */ 372 dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n", 373 drvvbus ? "on" : "off", 374 usb_otg_state_string(musb->xceiv->state), 375 err ? " ERROR" : "", 376 devctl); 377 ret = IRQ_HANDLED; 378 } 379 380 if (musb->int_tx || musb->int_rx || musb->int_usb) 381 ret |= musb_interrupt(musb); 382 383 /* Poll for ID change in OTG port mode */ 384 if (musb->xceiv->state == OTG_STATE_B_IDLE && 385 musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE) 386 mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ); 387out: 388 spin_unlock_irqrestore(&musb->lock, flags); 389 390 return ret; 391} 392 393static int dsps_musb_dbg_init(struct musb *musb, struct dsps_glue *glue) 394{ 395 struct dentry *root; 396 struct dentry *file; 397 char buf[128]; 398 399 sprintf(buf, "%s.dsps", dev_name(musb->controller)); 400 root = debugfs_create_dir(buf, NULL); 401 if (!root) 402 return -ENOMEM; 403 glue->dbgfs_root = root; 404 405 glue->regset.regs = dsps_musb_regs; 406 glue->regset.nregs = ARRAY_SIZE(dsps_musb_regs); 407 glue->regset.base = musb->ctrl_base; 408 409 file = debugfs_create_regset32("regdump", S_IRUGO, root, &glue->regset); 410 if (!file) { 411 debugfs_remove_recursive(root); 412 return -ENOMEM; 413 } 414 return 0; 415} 416 417static int dsps_musb_init(struct musb *musb) 418{ 419 struct device *dev = musb->controller; 420 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 421 struct platform_device *parent = to_platform_device(dev->parent); 422 const struct dsps_musb_wrapper *wrp = glue->wrp; 423 void __iomem *reg_base; 424 struct resource *r; 425 u32 rev, val; 426 int ret; 427 428 r = platform_get_resource_byname(parent, IORESOURCE_MEM, "control"); 429 if (!r) 430 return -EINVAL; 431 432 reg_base = devm_ioremap_resource(dev, r); 433 if (IS_ERR(reg_base)) 434 return PTR_ERR(reg_base); 435 musb->ctrl_base = reg_base; 436 437 /* NOP driver needs change if supporting dual instance */ 438 musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0); 439 if (IS_ERR(musb->xceiv)) 440 return PTR_ERR(musb->xceiv); 441 442 /* Returns zero if e.g. not clocked */ 443 rev = dsps_readl(reg_base, wrp->revision); 444 if (!rev) 445 return -ENODEV; 446 447 usb_phy_init(musb->xceiv); 448 setup_timer(&glue->timer, otg_timer, (unsigned long) musb); 449 450 /* Reset the musb */ 451 dsps_writel(reg_base, wrp->control, (1 << wrp->reset)); 452 453 musb->isr = dsps_interrupt; 454 455 /* reset the otgdisable bit, needed for host mode to work */ 456 val = dsps_readl(reg_base, wrp->phy_utmi); 457 val &= ~(1 << wrp->otg_disable); 458 dsps_writel(musb->ctrl_base, wrp->phy_utmi, val); 459 460 ret = dsps_musb_dbg_init(musb, glue); 461 if (ret) 462 return ret; 463 464 return 0; 465} 466 467static int dsps_musb_exit(struct musb *musb) 468{ 469 struct device *dev = musb->controller; 470 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 471 472 del_timer_sync(&glue->timer); 473 474 usb_phy_shutdown(musb->xceiv); 475 return 0; 476} 477 478static int dsps_musb_set_mode(struct musb *musb, u8 mode) 479{ 480 struct device *dev = musb->controller; 481 struct dsps_glue *glue = dev_get_drvdata(dev->parent); 482 const struct dsps_musb_wrapper *wrp = glue->wrp; 483 void __iomem *ctrl_base = musb->ctrl_base; 484 void __iomem *base = musb->mregs; 485 u32 reg; 486 487 reg = dsps_readl(base, wrp->mode); 488 489 switch (mode) { 490 case MUSB_HOST: 491 reg &= ~(1 << wrp->iddig); 492 493 /* 494 * if we're setting mode to host-only or device-only, we're 495 * going to ignore whatever the PHY sends us and just force 496 * ID pin status by SW 497 */ 498 reg |= (1 << wrp->iddig_mux); 499 500 dsps_writel(base, wrp->mode, reg); 501 dsps_writel(ctrl_base, wrp->phy_utmi, 0x02); 502 break; 503 case MUSB_PERIPHERAL: 504 reg |= (1 << wrp->iddig); 505 506 /* 507 * if we're setting mode to host-only or device-only, we're 508 * going to ignore whatever the PHY sends us and just force 509 * ID pin status by SW 510 */ 511 reg |= (1 << wrp->iddig_mux); 512 513 dsps_writel(base, wrp->mode, reg); 514 break; 515 case MUSB_OTG: 516 dsps_writel(base, wrp->phy_utmi, 0x02); 517 break; 518 default: 519 dev_err(glue->dev, "unsupported mode %d\n", mode); 520 return -EINVAL; 521 } 522 523 return 0; 524} 525 526static struct musb_platform_ops dsps_ops = { 527 .init = dsps_musb_init, 528 .exit = dsps_musb_exit, 529 530 .enable = dsps_musb_enable, 531 .disable = dsps_musb_disable, 532 533 .try_idle = dsps_musb_try_idle, 534 .set_mode = dsps_musb_set_mode, 535}; 536 537static u64 musb_dmamask = DMA_BIT_MASK(32); 538 539static int get_int_prop(struct device_node *dn, const char *s) 540{ 541 int ret; 542 u32 val; 543 544 ret = of_property_read_u32(dn, s, &val); 545 if (ret) 546 return 0; 547 return val; 548} 549 550static int get_musb_port_mode(struct device *dev) 551{ 552 enum usb_dr_mode mode; 553 554 mode = of_usb_get_dr_mode(dev->of_node); 555 switch (mode) { 556 case USB_DR_MODE_HOST: 557 return MUSB_PORT_MODE_HOST; 558 559 case USB_DR_MODE_PERIPHERAL: 560 return MUSB_PORT_MODE_GADGET; 561 562 case USB_DR_MODE_UNKNOWN: 563 case USB_DR_MODE_OTG: 564 default: 565 return MUSB_PORT_MODE_DUAL_ROLE; 566 } 567} 568 569static int dsps_create_musb_pdev(struct dsps_glue *glue, 570 struct platform_device *parent) 571{ 572 struct musb_hdrc_platform_data pdata; 573 struct resource resources[2]; 574 struct resource *res; 575 struct device *dev = &parent->dev; 576 struct musb_hdrc_config *config; 577 struct platform_device *musb; 578 struct device_node *dn = parent->dev.of_node; 579 int ret; 580 581 memset(resources, 0, sizeof(resources)); 582 res = platform_get_resource_byname(parent, IORESOURCE_MEM, "mc"); 583 if (!res) { 584 dev_err(dev, "failed to get memory.\n"); 585 return -EINVAL; 586 } 587 resources[0] = *res; 588 589 res = platform_get_resource_byname(parent, IORESOURCE_IRQ, "mc"); 590 if (!res) { 591 dev_err(dev, "failed to get irq.\n"); 592 return -EINVAL; 593 } 594 resources[1] = *res; 595 596 /* allocate the child platform device */ 597 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); 598 if (!musb) { 599 dev_err(dev, "failed to allocate musb device\n"); 600 return -ENOMEM; 601 } 602 603 musb->dev.parent = dev; 604 musb->dev.dma_mask = &musb_dmamask; 605 musb->dev.coherent_dma_mask = musb_dmamask; 606 musb->dev.of_node = of_node_get(dn); 607 608 glue->musb = musb; 609 610 ret = platform_device_add_resources(musb, resources, 611 ARRAY_SIZE(resources)); 612 if (ret) { 613 dev_err(dev, "failed to add resources\n"); 614 goto err; 615 } 616 617 config = devm_kzalloc(&parent->dev, sizeof(*config), GFP_KERNEL); 618 if (!config) { 619 dev_err(dev, "failed to allocate musb hdrc config\n"); 620 ret = -ENOMEM; 621 goto err; 622 } 623 pdata.config = config; 624 pdata.platform_ops = &dsps_ops; 625 626 config->num_eps = get_int_prop(dn, "mentor,num-eps"); 627 config->ram_bits = get_int_prop(dn, "mentor,ram-bits"); 628 config->host_port_deassert_reset_at_resume = 1; 629 pdata.mode = get_musb_port_mode(dev); 630 /* DT keeps this entry in mA, musb expects it as per USB spec */ 631 pdata.power = get_int_prop(dn, "mentor,power") / 2; 632 config->multipoint = of_property_read_bool(dn, "mentor,multipoint"); 633 634 ret = platform_device_add_data(musb, &pdata, sizeof(pdata)); 635 if (ret) { 636 dev_err(dev, "failed to add platform_data\n"); 637 goto err; 638 } 639 640 ret = platform_device_add(musb); 641 if (ret) { 642 dev_err(dev, "failed to register musb device\n"); 643 goto err; 644 } 645 return 0; 646 647err: 648 platform_device_put(musb); 649 return ret; 650} 651 652static int dsps_probe(struct platform_device *pdev) 653{ 654 const struct of_device_id *match; 655 const struct dsps_musb_wrapper *wrp; 656 struct dsps_glue *glue; 657 int ret; 658 659 if (!strcmp(pdev->name, "musb-hdrc")) 660 return -ENODEV; 661 662 match = of_match_node(musb_dsps_of_match, pdev->dev.of_node); 663 if (!match) { 664 dev_err(&pdev->dev, "fail to get matching of_match struct\n"); 665 return -EINVAL; 666 } 667 wrp = match->data; 668 669 /* allocate glue */ 670 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); 671 if (!glue) { 672 dev_err(&pdev->dev, "unable to allocate glue memory\n"); 673 return -ENOMEM; 674 } 675 676 glue->dev = &pdev->dev; 677 glue->wrp = wrp; 678 679 platform_set_drvdata(pdev, glue); 680 pm_runtime_enable(&pdev->dev); 681 682 ret = pm_runtime_get_sync(&pdev->dev); 683 if (ret < 0) { 684 dev_err(&pdev->dev, "pm_runtime_get_sync FAILED"); 685 goto err2; 686 } 687 688 ret = dsps_create_musb_pdev(glue, pdev); 689 if (ret) 690 goto err3; 691 692 return 0; 693 694err3: 695 pm_runtime_put(&pdev->dev); 696err2: 697 pm_runtime_disable(&pdev->dev); 698 return ret; 699} 700 701static int dsps_remove(struct platform_device *pdev) 702{ 703 struct dsps_glue *glue = platform_get_drvdata(pdev); 704 705 platform_device_unregister(glue->musb); 706 707 /* disable usbss clocks */ 708 pm_runtime_put(&pdev->dev); 709 pm_runtime_disable(&pdev->dev); 710 711 debugfs_remove_recursive(glue->dbgfs_root); 712 713 return 0; 714} 715 716static const struct dsps_musb_wrapper am33xx_driver_data = { 717 .revision = 0x00, 718 .control = 0x14, 719 .status = 0x18, 720 .epintr_set = 0x38, 721 .epintr_clear = 0x40, 722 .epintr_status = 0x30, 723 .coreintr_set = 0x3c, 724 .coreintr_clear = 0x44, 725 .coreintr_status = 0x34, 726 .phy_utmi = 0xe0, 727 .mode = 0xe8, 728 .tx_mode = 0x70, 729 .rx_mode = 0x74, 730 .reset = 0, 731 .otg_disable = 21, 732 .iddig = 8, 733 .iddig_mux = 7, 734 .usb_shift = 0, 735 .usb_mask = 0x1ff, 736 .usb_bitmap = (0x1ff << 0), 737 .drvvbus = 8, 738 .txep_shift = 0, 739 .txep_mask = 0xffff, 740 .txep_bitmap = (0xffff << 0), 741 .rxep_shift = 16, 742 .rxep_mask = 0xfffe, 743 .rxep_bitmap = (0xfffe << 16), 744 .poll_seconds = 2, 745}; 746 747static const struct of_device_id musb_dsps_of_match[] = { 748 { .compatible = "ti,musb-am33xx", 749 .data = (void *) &am33xx_driver_data, }, 750 { }, 751}; 752MODULE_DEVICE_TABLE(of, musb_dsps_of_match); 753 754#ifdef CONFIG_PM 755static int dsps_suspend(struct device *dev) 756{ 757 struct dsps_glue *glue = dev_get_drvdata(dev); 758 const struct dsps_musb_wrapper *wrp = glue->wrp; 759 struct musb *musb = platform_get_drvdata(glue->musb); 760 void __iomem *mbase = musb->ctrl_base; 761 762 glue->context.control = dsps_readl(mbase, wrp->control); 763 glue->context.epintr = dsps_readl(mbase, wrp->epintr_set); 764 glue->context.coreintr = dsps_readl(mbase, wrp->coreintr_set); 765 glue->context.phy_utmi = dsps_readl(mbase, wrp->phy_utmi); 766 glue->context.mode = dsps_readl(mbase, wrp->mode); 767 glue->context.tx_mode = dsps_readl(mbase, wrp->tx_mode); 768 glue->context.rx_mode = dsps_readl(mbase, wrp->rx_mode); 769 770 return 0; 771} 772 773static int dsps_resume(struct device *dev) 774{ 775 struct dsps_glue *glue = dev_get_drvdata(dev); 776 const struct dsps_musb_wrapper *wrp = glue->wrp; 777 struct musb *musb = platform_get_drvdata(glue->musb); 778 void __iomem *mbase = musb->ctrl_base; 779 780 dsps_writel(mbase, wrp->control, glue->context.control); 781 dsps_writel(mbase, wrp->epintr_set, glue->context.epintr); 782 dsps_writel(mbase, wrp->coreintr_set, glue->context.coreintr); 783 dsps_writel(mbase, wrp->phy_utmi, glue->context.phy_utmi); 784 dsps_writel(mbase, wrp->mode, glue->context.mode); 785 dsps_writel(mbase, wrp->tx_mode, glue->context.tx_mode); 786 dsps_writel(mbase, wrp->rx_mode, glue->context.rx_mode); 787 788 return 0; 789} 790#endif 791 792static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume); 793 794static struct platform_driver dsps_usbss_driver = { 795 .probe = dsps_probe, 796 .remove = dsps_remove, 797 .driver = { 798 .name = "musb-dsps", 799 .pm = &dsps_pm_ops, 800 .of_match_table = musb_dsps_of_match, 801 }, 802}; 803 804MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer"); 805MODULE_AUTHOR("Ravi B <ravibabu@ti.com>"); 806MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>"); 807MODULE_LICENSE("GPL v2"); 808 809module_platform_driver(dsps_usbss_driver); 810