drivers/usb/musb/da8xx.c

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This source file includes following definitions.
da8xx_musb_enable
da8xx_musb_disable
da8xx_musb_set_vbus
otg_timer
da8xx_musb_try_idle
da8xx_musb_interrupt
da8xx_musb_set_mode
da8xx_musb_init
da8xx_musb_exit
get_vbus_power
da8xx_dma_controller_callback
da8xx_dma_controller_create
da8xx_probe
da8xx_remove
da8xx_suspend
da8xx_resume
   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 
  66 struct 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  */
  84 static 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  */
 103 static 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 
 115 static 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 
 122 static 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 
 193 static 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 
 222 static 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 
 325 static 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 
 354 static 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 
 407 err_phy_power_on:
 408         phy_exit(glue->phy);
 409 fail:
 410         clk_disable_unprepare(glue->clk);
 411         return ret;
 412 }
 413 
 414 static 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 
 429 static 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
 445 static 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 
 453 static struct dma_controller *
 454 da8xx_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 
 468 static 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 
 488 static 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 
 494 static const struct musb_hdrc_config da8xx_config = {
 495         .ram_bits = 10,
 496         .num_eps = 5,
 497         .multipoint = 1,
 498 };
 499 
 500 static struct of_dev_auxdata da8xx_auxdata_lookup[] = {
 501         OF_DEV_AUXDATA("ti,da830-cppi41", 0x01e01000, "cppi41-dmaengine",
 502                        NULL),
 503         {}
 504 };
 505 
 506 static int da8xx_probe(struct platform_device *pdev)
 507 {
 508         struct resource musb_resources[2];
 509         struct musb_hdrc_platform_data  *pdata = dev_get_platdata(&pdev->dev);
 510         struct da8xx_glue               *glue;
 511         struct platform_device_info     pinfo;
 512         struct clk                      *clk;
 513         struct device_node              *np = pdev->dev.of_node;
 514         int                             ret;
 515 
 516         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
 517         if (!glue)
 518                 return -ENOMEM;
 519 
 520         clk = devm_clk_get(&pdev->dev, NULL);
 521         if (IS_ERR(clk)) {
 522                 dev_err(&pdev->dev, "failed to get clock\n");
 523                 return PTR_ERR(clk);
 524         }
 525 
 526         glue->phy = devm_phy_get(&pdev->dev, "usb-phy");
 527         if (IS_ERR(glue->phy)) {
 528                 if (PTR_ERR(glue->phy) != -EPROBE_DEFER)
 529                         dev_err(&pdev->dev, "failed to get phy\n");
 530                 return PTR_ERR(glue->phy);
 531         }
 532 
 533         glue->dev                       = &pdev->dev;
 534         glue->clk                       = clk;
 535 
 536         if (IS_ENABLED(CONFIG_OF) && np) {
 537                 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 538                 if (!pdata)
 539                         return -ENOMEM;
 540 
 541                 pdata->config   = &da8xx_config;
 542                 pdata->mode     = musb_get_mode(&pdev->dev);
 543                 pdata->power    = get_vbus_power(&pdev->dev);
 544         }
 545 
 546         pdata->platform_ops             = &da8xx_ops;
 547 
 548         glue->usb_phy = usb_phy_generic_register();
 549         ret = PTR_ERR_OR_ZERO(glue->usb_phy);
 550         if (ret) {
 551                 dev_err(&pdev->dev, "failed to register usb_phy\n");
 552                 return ret;
 553         }
 554         platform_set_drvdata(pdev, glue);
 555 
 556         ret = of_platform_populate(pdev->dev.of_node, NULL,
 557                                    da8xx_auxdata_lookup, &pdev->dev);
 558         if (ret)
 559                 return ret;
 560 
 561         memset(musb_resources, 0x00, sizeof(*musb_resources) *
 562                         ARRAY_SIZE(musb_resources));
 563 
 564         musb_resources[0].name = pdev->resource[0].name;
 565         musb_resources[0].start = pdev->resource[0].start;
 566         musb_resources[0].end = pdev->resource[0].end;
 567         musb_resources[0].flags = pdev->resource[0].flags;
 568 
 569         musb_resources[1].name = pdev->resource[1].name;
 570         musb_resources[1].start = pdev->resource[1].start;
 571         musb_resources[1].end = pdev->resource[1].end;
 572         musb_resources[1].flags = pdev->resource[1].flags;
 573 
 574         pinfo = da8xx_dev_info;
 575         pinfo.parent = &pdev->dev;
 576         pinfo.res = musb_resources;
 577         pinfo.num_res = ARRAY_SIZE(musb_resources);
 578         pinfo.data = pdata;
 579         pinfo.size_data = sizeof(*pdata);
 580 
 581         glue->musb = platform_device_register_full(&pinfo);
 582         ret = PTR_ERR_OR_ZERO(glue->musb);
 583         if (ret) {
 584                 dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
 585                 usb_phy_generic_unregister(glue->usb_phy);
 586         }
 587 
 588         return ret;
 589 }
 590 
 591 static int da8xx_remove(struct platform_device *pdev)
 592 {
 593         struct da8xx_glue               *glue = platform_get_drvdata(pdev);
 594 
 595         platform_device_unregister(glue->musb);
 596         usb_phy_generic_unregister(glue->usb_phy);
 597 
 598         return 0;
 599 }
 600 
 601 #ifdef CONFIG_PM_SLEEP
 602 static int da8xx_suspend(struct device *dev)
 603 {
 604         int ret;
 605         struct da8xx_glue *glue = dev_get_drvdata(dev);
 606 
 607         ret = phy_power_off(glue->phy);
 608         if (ret)
 609                 return ret;
 610         clk_disable_unprepare(glue->clk);
 611 
 612         return 0;
 613 }
 614 
 615 static int da8xx_resume(struct device *dev)
 616 {
 617         int ret;
 618         struct da8xx_glue *glue = dev_get_drvdata(dev);
 619 
 620         ret = clk_prepare_enable(glue->clk);
 621         if (ret)
 622                 return ret;
 623         return phy_power_on(glue->phy);
 624 }
 625 #endif
 626 
 627 static SIMPLE_DEV_PM_OPS(da8xx_pm_ops, da8xx_suspend, da8xx_resume);
 628 
 629 #ifdef CONFIG_OF
 630 static const struct of_device_id da8xx_id_table[] = {
 631         {
 632                 .compatible = "ti,da830-musb",
 633         },
 634         {},
 635 };
 636 MODULE_DEVICE_TABLE(of, da8xx_id_table);
 637 #endif
 638 
 639 static struct platform_driver da8xx_driver = {
 640         .probe          = da8xx_probe,
 641         .remove         = da8xx_remove,
 642         .driver         = {
 643                 .name   = "musb-da8xx",
 644                 .pm = &da8xx_pm_ops,
 645                 .of_match_table = of_match_ptr(da8xx_id_table),
 646         },
 647 };
 648 
 649 MODULE_DESCRIPTION("DA8xx/OMAP-L1x MUSB Glue Layer");
 650 MODULE_AUTHOR("Sergei Shtylyov <sshtylyov@ru.mvista.com>");
 651 MODULE_LICENSE("GPL v2");
 652 module_platform_driver(da8xx_driver);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/usb/musb/da8xx.c

DEFINITIONS
