linux/drivers/usb/musb/da8xx.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Texas Instruments DA8xx/OMAP-L1x "glue layer"
   4 *
   5 * Copyright (c) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
   6 *
   7 * Based on the DaVinci "glue layer" code.
   8 * Copyright (C) 2005-2006 by Texas Instruments
   9 *
  10 * DT support
  11 * Copyright (c) 2016 Petr Kulhavy <petr@barix.com>
  12 *
  13 * This file is part of the Inventra Controller Driver for Linux.
  14 */
  15
  16#include <linux/module.h>
  17#include <linux/clk.h>
  18#include <linux/err.h>
  19#include <linux/io.h>
  20#include <linux/of_platform.h>
  21#include <linux/phy/phy.h>
  22#include <linux/platform_device.h>
  23#include <linux/dma-mapping.h>
  24#include <linux/usb/usb_phy_generic.h>
  25
  26#include "musb_core.h"
  27
  28/*
  29 * DA8XX specific definitions
  30 */
  31
  32/* USB 2.0 OTG module registers */
  33#define DA8XX_USB_REVISION_REG  0x00
  34#define DA8XX_USB_CTRL_REG      0x04
  35#define DA8XX_USB_STAT_REG      0x08
  36#define DA8XX_USB_EMULATION_REG 0x0c
  37#define DA8XX_USB_SRP_FIX_TIME_REG 0x18
  38#define DA8XX_USB_INTR_SRC_REG  0x20
  39#define DA8XX_USB_INTR_SRC_SET_REG 0x24
  40#define DA8XX_USB_INTR_SRC_CLEAR_REG 0x28
  41#define DA8XX_USB_INTR_MASK_REG 0x2c
  42#define DA8XX_USB_INTR_MASK_SET_REG 0x30
  43#define DA8XX_USB_INTR_MASK_CLEAR_REG 0x34
  44#define DA8XX_USB_INTR_SRC_MASKED_REG 0x38
  45#define DA8XX_USB_END_OF_INTR_REG 0x3c
  46#define DA8XX_USB_GENERIC_RNDIS_EP_SIZE_REG(n) (0x50 + (((n) - 1) << 2))
  47
  48/* Control register bits */
  49#define DA8XX_SOFT_RESET_MASK   1
  50
  51#define DA8XX_USB_TX_EP_MASK    0x1f            /* EP0 + 4 Tx EPs */
  52#define DA8XX_USB_RX_EP_MASK    0x1e            /* 4 Rx EPs */
  53
  54/* USB interrupt register bits */
  55#define DA8XX_INTR_USB_SHIFT    16
  56#define DA8XX_INTR_USB_MASK     (0x1ff << DA8XX_INTR_USB_SHIFT) /* 8 Mentor */
  57                                        /* interrupts and DRVVBUS interrupt */
  58#define DA8XX_INTR_DRVVBUS      0x100
  59#define DA8XX_INTR_RX_SHIFT     8
  60#define DA8XX_INTR_RX_MASK      (DA8XX_USB_RX_EP_MASK << DA8XX_INTR_RX_SHIFT)
  61#define DA8XX_INTR_TX_SHIFT     0
  62#define DA8XX_INTR_TX_MASK      (DA8XX_USB_TX_EP_MASK << DA8XX_INTR_TX_SHIFT)
  63
  64#define DA8XX_MENTOR_CORE_OFFSET 0x400
  65
  66struct da8xx_glue {
  67        struct device           *dev;
  68        struct platform_device  *musb;
  69        struct platform_device  *usb_phy;
  70        struct clk              *clk;
  71        struct phy              *phy;
  72};
  73
  74/*
  75 * Because we don't set CTRL.UINT, it's "important" to:
  76 *      - not read/write INTRUSB/INTRUSBE (except during
  77 *        initial setup, as a workaround);
  78 *      - use INTSET/INTCLR instead.
  79 */
  80
  81/**
  82 * da8xx_musb_enable - enable interrupts
  83 */
  84static void da8xx_musb_enable(struct musb *musb)
  85{
  86        void __iomem *reg_base = musb->ctrl_base;
  87        u32 mask;
  88
  89        /* Workaround: setup IRQs through both register sets. */
  90        mask = ((musb->epmask & DA8XX_USB_TX_EP_MASK) << DA8XX_INTR_TX_SHIFT) |
  91               ((musb->epmask & DA8XX_USB_RX_EP_MASK) << DA8XX_INTR_RX_SHIFT) |
  92               DA8XX_INTR_USB_MASK;
  93        musb_writel(reg_base, DA8XX_USB_INTR_MASK_SET_REG, mask);
  94
  95        /* Force the DRVVBUS IRQ so we can start polling for ID change. */
  96        musb_writel(reg_base, DA8XX_USB_INTR_SRC_SET_REG,
  97                        DA8XX_INTR_DRVVBUS << DA8XX_INTR_USB_SHIFT);
  98}
  99
 100/**
 101 * da8xx_musb_disable - disable HDRC and flush interrupts
 102 */
 103static void da8xx_musb_disable(struct musb *musb)
 104{
 105        void __iomem *reg_base = musb->ctrl_base;
 106
 107        musb_writel(reg_base, DA8XX_USB_INTR_MASK_CLEAR_REG,
 108                    DA8XX_INTR_USB_MASK |
 109                    DA8XX_INTR_TX_MASK | DA8XX_INTR_RX_MASK);
 110        musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0);
 111}
 112
 113#define portstate(stmt)         stmt
 114
 115static void da8xx_musb_set_vbus(struct musb *musb, int is_on)
 116{
 117        WARN_ON(is_on && is_peripheral_active(musb));
 118}
 119
 120#define POLL_SECONDS    2
 121
 122static void otg_timer(struct timer_list *t)
 123{
 124        struct musb             *musb = from_timer(musb, t, dev_timer);
 125        void __iomem            *mregs = musb->mregs;
 126        u8                      devctl;
 127        unsigned long           flags;
 128
 129        /*
 130         * We poll because DaVinci's won't expose several OTG-critical
 131         * status change events (from the transceiver) otherwise.
 132         */
 133        devctl = musb_readb(mregs, MUSB_DEVCTL);
 134        dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
 135                usb_otg_state_string(musb->xceiv->otg->state));
 136
 137        spin_lock_irqsave(&musb->lock, flags);
 138        switch (musb->xceiv->otg->state) {
 139        case OTG_STATE_A_WAIT_BCON:
 140                devctl &= ~MUSB_DEVCTL_SESSION;
 141                musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 142
 143                devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 144                if (devctl & MUSB_DEVCTL_BDEVICE) {
 145                        musb->xceiv->otg->state = OTG_STATE_B_IDLE;
 146                        MUSB_DEV_MODE(musb);
 147                } else {
 148                        musb->xceiv->otg->state = OTG_STATE_A_IDLE;
 149                        MUSB_HST_MODE(musb);
 150                }
 151                break;
 152        case OTG_STATE_A_WAIT_VFALL:
 153                /*
 154                 * Wait till VBUS falls below SessionEnd (~0.2 V); the 1.3
 155                 * RTL seems to mis-handle session "start" otherwise (or in
 156                 * our case "recover"), in routine "VBUS was valid by the time
 157                 * VBUSERR got reported during enumeration" cases.
 158                 */
 159                if (devctl & MUSB_DEVCTL_VBUS) {
 160                        mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);
 161                        break;
 162                }
 163                musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
 164                musb_writel(musb->ctrl_base, DA8XX_USB_INTR_SRC_SET_REG,
 165                            MUSB_INTR_VBUSERROR << DA8XX_INTR_USB_SHIFT);
 166                break;
 167        case OTG_STATE_B_IDLE:
 168                /*
 169                 * There's no ID-changed IRQ, so we have no good way to tell
 170                 * when to switch to the A-Default state machine (by setting
 171                 * the DEVCTL.Session bit).
 172                 *
 173                 * Workaround:  whenever we're in B_IDLE, try setting the
 174                 * session flag every few seconds.  If it works, ID was
 175                 * grounded and we're now in the A-Default state machine.
 176                 *
 177                 * NOTE: setting the session flag is _supposed_ to trigger
 178                 * SRP but clearly it doesn't.
 179                 */
 180                musb_writeb(mregs, MUSB_DEVCTL, devctl | MUSB_DEVCTL_SESSION);
 181                devctl = musb_readb(mregs, MUSB_DEVCTL);
 182                if (devctl & MUSB_DEVCTL_BDEVICE)
 183                        mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);
 184                else
 185                        musb->xceiv->otg->state = OTG_STATE_A_IDLE;
 186                break;
 187        default:
 188                break;
 189        }
 190        spin_unlock_irqrestore(&musb->lock, flags);
 191}
 192
 193static void da8xx_musb_try_idle(struct musb *musb, unsigned long timeout)
 194{
 195        static unsigned long last_timer;
 196
 197        if (timeout == 0)
 198                timeout = jiffies + msecs_to_jiffies(3);
 199
 200        /* Never idle if active, or when VBUS timeout is not set as host */
 201        if (musb->is_active || (musb->a_wait_bcon == 0 &&
 202                                musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON)) {
 203                dev_dbg(musb->controller, "%s active, deleting timer\n",
 204                        usb_otg_state_string(musb->xceiv->otg->state));
 205                del_timer(&musb->dev_timer);
 206                last_timer = jiffies;
 207                return;
 208        }
 209
 210        if (time_after(last_timer, timeout) && timer_pending(&musb->dev_timer)) {
 211                dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n");
 212                return;
 213        }
 214        last_timer = timeout;
 215
 216        dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
 217                usb_otg_state_string(musb->xceiv->otg->state),
 218                jiffies_to_msecs(timeout - jiffies));
 219        mod_timer(&musb->dev_timer, timeout);
 220}
 221
 222static irqreturn_t da8xx_musb_interrupt(int irq, void *hci)
 223{
 224        struct musb             *musb = hci;
 225        void __iomem            *reg_base = musb->ctrl_base;
 226        unsigned long           flags;
 227        irqreturn_t             ret = IRQ_NONE;
 228        u32                     status;
 229
 230        spin_lock_irqsave(&musb->lock, flags);
 231
 232        /*
 233         * NOTE: DA8XX shadows the Mentor IRQs.  Don't manage them through
 234         * the Mentor registers (except for setup), use the TI ones and EOI.
 235         */
 236
 237        /* Acknowledge and handle non-CPPI interrupts */
 238        status = musb_readl(reg_base, DA8XX_USB_INTR_SRC_MASKED_REG);
 239        if (!status)
 240                goto eoi;
 241
 242        musb_writel(reg_base, DA8XX_USB_INTR_SRC_CLEAR_REG, status);
 243        dev_dbg(musb->controller, "USB IRQ %08x\n", status);
 244
 245        musb->int_rx = (status & DA8XX_INTR_RX_MASK) >> DA8XX_INTR_RX_SHIFT;
 246        musb->int_tx = (status & DA8XX_INTR_TX_MASK) >> DA8XX_INTR_TX_SHIFT;
 247        musb->int_usb = (status & DA8XX_INTR_USB_MASK) >> DA8XX_INTR_USB_SHIFT;
 248
 249        /*
 250         * DRVVBUS IRQs are the only proxy we have (a very poor one!) for
 251         * DA8xx's missing ID change IRQ.  We need an ID change IRQ to
 252         * switch appropriately between halves of the OTG state machine.
 253         * Managing DEVCTL.Session per Mentor docs requires that we know its
 254         * value but DEVCTL.BDevice is invalid without DEVCTL.Session set.
 255         * Also, DRVVBUS pulses for SRP (but not at 5 V)...
 256         */
 257        if (status & (DA8XX_INTR_DRVVBUS << DA8XX_INTR_USB_SHIFT)) {
 258                int drvvbus = musb_readl(reg_base, DA8XX_USB_STAT_REG);
 259                void __iomem *mregs = musb->mregs;
 260                u8 devctl = musb_readb(mregs, MUSB_DEVCTL);
 261                int err;
 262
 263                err = musb->int_usb & MUSB_INTR_VBUSERROR;
 264                if (err) {
 265                        /*
 266                         * The Mentor core doesn't debounce VBUS as needed
 267                         * to cope with device connect current spikes. This
 268                         * means it's not uncommon for bus-powered devices
 269                         * to get VBUS errors during enumeration.
 270                         *
 271                         * This is a workaround, but newer RTL from Mentor
 272                         * seems to allow a better one: "re"-starting sessions
 273                         * without waiting for VBUS to stop registering in
 274                         * devctl.
 275                         */
 276                        musb->int_usb &= ~MUSB_INTR_VBUSERROR;
 277                        musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
 278                        mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);
 279                        WARNING("VBUS error workaround (delay coming)\n");
 280                } else if (drvvbus) {
 281                        MUSB_HST_MODE(musb);
 282                        musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
 283                        portstate(musb->port1_status |= USB_PORT_STAT_POWER);
 284                        del_timer(&musb->dev_timer);
 285                } else if (!(musb->int_usb & MUSB_INTR_BABBLE)) {
 286                        /*
 287                         * When babble condition happens, drvvbus interrupt
 288                         * is also generated. Ignore this drvvbus interrupt
 289                         * and let babble interrupt handler recovers the
 290                         * controller; otherwise, the host-mode flag is lost
 291                         * due to the MUSB_DEV_MODE() call below and babble
 292                         * recovery logic will not be called.
 293                         */
 294                        musb->is_active = 0;
 295                        MUSB_DEV_MODE(musb);
 296                        musb->xceiv->otg->state = OTG_STATE_B_IDLE;
 297                        portstate(musb->port1_status &= ~USB_PORT_STAT_POWER);
 298                }
 299
 300                dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
 301                                drvvbus ? "on" : "off",
 302                                usb_otg_state_string(musb->xceiv->otg->state),
 303                                err ? " ERROR" : "",
 304                                devctl);
 305                ret = IRQ_HANDLED;
 306        }
 307
 308        if (musb->int_tx || musb->int_rx || musb->int_usb)
 309                ret |= musb_interrupt(musb);
 310
 311 eoi:
 312        /* EOI needs to be written for the IRQ to be re-asserted. */
 313        if (ret == IRQ_HANDLED || status)
 314                musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0);
 315
 316        /* Poll for ID change */
 317        if (musb->xceiv->otg->state == OTG_STATE_B_IDLE)
 318                mod_timer(&musb->dev_timer, jiffies + POLL_SECONDS * HZ);
 319
 320        spin_unlock_irqrestore(&musb->lock, flags);
 321
 322        return ret;
 323}
 324
 325static int da8xx_musb_set_mode(struct musb *musb, u8 musb_mode)
 326{
 327        struct da8xx_glue *glue = dev_get_drvdata(musb->controller->parent);
 328        enum phy_mode phy_mode;
 329
 330        /*
 331         * The PHY has some issues when it is forced in device or host mode.
 332         * Unless the user request another mode, configure the PHY in OTG mode.
 333         */
 334        if (!musb->is_initialized)
 335                return phy_set_mode(glue->phy, PHY_MODE_USB_OTG);
 336
 337        switch (musb_mode) {
 338        case MUSB_HOST:         /* Force VBUS valid, ID = 0 */
 339                phy_mode = PHY_MODE_USB_HOST;
 340                break;
 341        case MUSB_PERIPHERAL:   /* Force VBUS valid, ID = 1 */
 342                phy_mode = PHY_MODE_USB_DEVICE;
 343                break;
 344        case MUSB_OTG:          /* Don't override the VBUS/ID comparators */
 345                phy_mode = PHY_MODE_USB_OTG;
 346                break;
 347        default:
 348                return -EINVAL;
 349        }
 350
 351        return phy_set_mode(glue->phy, phy_mode);
 352}
 353
 354static int da8xx_musb_init(struct musb *musb)
 355{
 356        struct da8xx_glue *glue = dev_get_drvdata(musb->controller->parent);
 357        void __iomem *reg_base = musb->ctrl_base;
 358        u32 rev;
 359        int ret = -ENODEV;
 360
 361        musb->mregs += DA8XX_MENTOR_CORE_OFFSET;
 362
 363        ret = clk_prepare_enable(glue->clk);
 364        if (ret) {
 365                dev_err(glue->dev, "failed to enable clock\n");
 366                return ret;
 367        }
 368
 369        /* Returns zero if e.g. not clocked */
 370        rev = musb_readl(reg_base, DA8XX_USB_REVISION_REG);
 371        if (!rev)
 372                goto fail;
 373
 374        musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
 375        if (IS_ERR_OR_NULL(musb->xceiv)) {
 376                ret = -EPROBE_DEFER;
 377                goto fail;
 378        }
 379
 380        timer_setup(&musb->dev_timer, otg_timer, 0);
 381
 382        /* Reset the controller */
 383        musb_writel(reg_base, DA8XX_USB_CTRL_REG, DA8XX_SOFT_RESET_MASK);
 384
 385        /* Start the on-chip PHY and its PLL. */
 386        ret = phy_init(glue->phy);
 387        if (ret) {
 388                dev_err(glue->dev, "Failed to init phy.\n");
 389                goto fail;
 390        }
 391
 392        ret = phy_power_on(glue->phy);
 393        if (ret) {
 394                dev_err(glue->dev, "Failed to power on phy.\n");
 395                goto err_phy_power_on;
 396        }
 397
 398        msleep(5);
 399
 400        /* NOTE: IRQs are in mixed mode, not bypass to pure MUSB */
 401        pr_debug("DA8xx OTG revision %08x, control %02x\n", rev,
 402                 musb_readb(reg_base, DA8XX_USB_CTRL_REG));
 403
 404        musb->isr = da8xx_musb_interrupt;
 405        return 0;
 406
 407err_phy_power_on:
 408        phy_exit(glue->phy);
 409fail:
 410        clk_disable_unprepare(glue->clk);
 411        return ret;
 412}
 413
 414static int da8xx_musb_exit(struct musb *musb)
 415{
 416        struct da8xx_glue *glue = dev_get_drvdata(musb->controller->parent);
 417
 418        del_timer_sync(&musb->dev_timer);
 419
 420        phy_power_off(glue->phy);
 421        phy_exit(glue->phy);
 422        clk_disable_unprepare(glue->clk);
 423
 424        usb_put_phy(musb->xceiv);
 425
 426        return 0;
 427}
 428
 429static inline u8 get_vbus_power(struct device *dev)
 430{
 431        struct regulator *vbus_supply;
 432        int current_uA;
 433
 434        vbus_supply = regulator_get_optional(dev, "vbus");
 435        if (IS_ERR(vbus_supply))
 436                return 255;
 437        current_uA = regulator_get_current_limit(vbus_supply);
 438        regulator_put(vbus_supply);
 439        if (current_uA <= 0 || current_uA > 510000)
 440                return 255;
 441        return current_uA / 1000 / 2;
 442}
 443
 444#ifdef CONFIG_USB_TI_CPPI41_DMA
 445static void da8xx_dma_controller_callback(struct dma_controller *c)
 446{
 447        struct musb *musb = c->musb;
 448        void __iomem *reg_base = musb->ctrl_base;
 449
 450        musb_writel(reg_base, DA8XX_USB_END_OF_INTR_REG, 0);
 451}
 452
 453static struct dma_controller *
 454da8xx_dma_controller_create(struct musb *musb, void __iomem *base)
 455{
 456        struct dma_controller *controller;
 457
 458        controller = cppi41_dma_controller_create(musb, base);
 459        if (IS_ERR_OR_NULL(controller))
 460                return controller;
 461
 462        controller->dma_callback = da8xx_dma_controller_callback;
 463
 464        return controller;
 465}
 466#endif
 467
 468static const struct musb_platform_ops da8xx_ops = {
 469        .quirks         = MUSB_INDEXED_EP | MUSB_PRESERVE_SESSION |
 470                          MUSB_DMA_CPPI41 | MUSB_DA8XX,
 471        .init           = da8xx_musb_init,
 472        .exit           = da8xx_musb_exit,
 473
 474        .fifo_mode      = 2,
 475#ifdef CONFIG_USB_TI_CPPI41_DMA
 476        .dma_init       = da8xx_dma_controller_create,
 477        .dma_exit       = cppi41_dma_controller_destroy,
 478#endif
 479        .enable         = da8xx_musb_enable,
 480        .disable        = da8xx_musb_disable,
 481
 482        .set_mode       = da8xx_musb_set_mode,
 483        .try_idle       = da8xx_musb_try_idle,
 484
 485        .set_vbus       = da8xx_musb_set_vbus,
 486};
 487
 488static const struct platform_device_info da8xx_dev_info = {
 489        .name           = "musb-hdrc",
 490        .id             = PLATFORM_DEVID_AUTO,
 491        .dma_mask       = DMA_BIT_MASK(32),
 492};
 493
 494static const struct musb_hdrc_config da8xx_config = {
 495        .ram_bits = 10,
 496        .num_eps = 5,
 497        .multipoint = 1,
 498};
 499
 500static struct of_dev_auxdata da8xx_auxdata_lookup[] = {
 501        OF_DEV_AUXDATA("ti,da830-cppi41", 0x01e01000, "cppi41-dmaengine",
 502                       NULL),
 503        {}
 504};
 505
 506static int da8xx_probe(struct platform_device *pdev)
 507{
 508        struct musb_hdrc_platform_data  *pdata = dev_get_platdata(&pdev->dev);
 509        struct da8xx_glue               *glue;
 510        struct platform_device_info     pinfo;
 511        struct clk                      *clk;
 512        struct device_node              *np = pdev->dev.of_node;
 513        int                             ret;
 514
 515        glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
 516        if (!glue)
 517                return -ENOMEM;
 518
 519        clk = devm_clk_get(&pdev->dev, NULL);
 520        if (IS_ERR(clk)) {
 521                dev_err(&pdev->dev, "failed to get clock\n");
 522                return PTR_ERR(clk);
 523        }
 524
 525        glue->phy = devm_phy_get(&pdev->dev, "usb-phy");
 526        if (IS_ERR(glue->phy)) {
 527                if (PTR_ERR(glue->phy) != -EPROBE_DEFER)
 528                        dev_err(&pdev->dev, "failed to get phy\n");
 529                return PTR_ERR(glue->phy);
 530        }
 531
 532        glue->dev                       = &pdev->dev;
 533        glue->clk                       = clk;
 534
 535        if (IS_ENABLED(CONFIG_OF) && np) {
 536                pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 537                if (!pdata)
 538                        return -ENOMEM;
 539
 540                pdata->config   = &da8xx_config;
 541                pdata->mode     = musb_get_mode(&pdev->dev);
 542                pdata->power    = get_vbus_power(&pdev->dev);
 543        }
 544
 545        pdata->platform_ops             = &da8xx_ops;
 546
 547        glue->usb_phy = usb_phy_generic_register();
 548        ret = PTR_ERR_OR_ZERO(glue->usb_phy);
 549        if (ret) {
 550                dev_err(&pdev->dev, "failed to register usb_phy\n");
 551                return ret;
 552        }
 553        platform_set_drvdata(pdev, glue);
 554
 555        ret = of_platform_populate(pdev->dev.of_node, NULL,
 556                                   da8xx_auxdata_lookup, &pdev->dev);
 557        if (ret)
 558                return ret;
 559
 560        pinfo = da8xx_dev_info;
 561        pinfo.parent = &pdev->dev;
 562        pinfo.res = pdev->resource;
 563        pinfo.num_res = pdev->num_resources;
 564        pinfo.data = pdata;
 565        pinfo.size_data = sizeof(*pdata);
 566        pinfo.fwnode = of_fwnode_handle(np);
 567        pinfo.of_node_reused = true;
 568
 569        glue->musb = platform_device_register_full(&pinfo);
 570        ret = PTR_ERR_OR_ZERO(glue->musb);
 571        if (ret) {
 572                dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
 573                usb_phy_generic_unregister(glue->usb_phy);
 574        }
 575
 576        return ret;
 577}
 578
 579static int da8xx_remove(struct platform_device *pdev)
 580{
 581        struct da8xx_glue               *glue = platform_get_drvdata(pdev);
 582
 583        platform_device_unregister(glue->musb);
 584        usb_phy_generic_unregister(glue->usb_phy);
 585
 586        return 0;
 587}
 588
 589#ifdef CONFIG_PM_SLEEP
 590static int da8xx_suspend(struct device *dev)
 591{
 592        int ret;
 593        struct da8xx_glue *glue = dev_get_drvdata(dev);
 594
 595        ret = phy_power_off(glue->phy);
 596        if (ret)
 597                return ret;
 598        clk_disable_unprepare(glue->clk);
 599
 600        return 0;
 601}
 602
 603static int da8xx_resume(struct device *dev)
 604{
 605        int ret;
 606        struct da8xx_glue *glue = dev_get_drvdata(dev);
 607
 608        ret = clk_prepare_enable(glue->clk);
 609        if (ret)
 610                return ret;
 611        return phy_power_on(glue->phy);
 612}
 613#endif
 614
 615static SIMPLE_DEV_PM_OPS(da8xx_pm_ops, da8xx_suspend, da8xx_resume);
 616
 617#ifdef CONFIG_OF
 618static const struct of_device_id da8xx_id_table[] = {
 619        {
 620                .compatible = "ti,da830-musb",
 621        },
 622        {},
 623};
 624MODULE_DEVICE_TABLE(of, da8xx_id_table);
 625#endif
 626
 627static struct platform_driver da8xx_driver = {
 628        .probe          = da8xx_probe,
 629        .remove         = da8xx_remove,
 630        .driver         = {
 631                .name   = "musb-da8xx",
 632                .pm = &da8xx_pm_ops,
 633                .of_match_table = of_match_ptr(da8xx_id_table),
 634        },
 635};
 636
 637MODULE_DESCRIPTION("DA8xx/OMAP-L1x MUSB Glue Layer");
 638MODULE_AUTHOR("Sergei Shtylyov <sshtylyov@ru.mvista.com>");
 639MODULE_LICENSE("GPL v2");
 640module_platform_driver(da8xx_driver);
 641