drivers/usb/musb/tusb6010.c

   1 /*
   2  * TUSB6010 USB 2.0 OTG Dual Role controller
   3  *
   4  * Copyright (C) 2006 Nokia Corporation
   5  * Tony Lindgren <tony@atomide.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * Notes:
  12  * - Driver assumes that interface to external host (main CPU) is
  13  *   configured for NOR FLASH interface instead of VLYNQ serial
  14  *   interface.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/err.h>
  21 #include <linux/init.h>
  22 #include <linux/prefetch.h>
  23 #include <linux/usb.h>
  24 #include <linux/irq.h>
  25 #include <linux/io.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/usb/nop-usb-xceiv.h>
  29
  30 #include "musb_core.h"
  31
  32 struct tusb6010_glue {
  33         struct device           *dev;
  34         struct platform_device  *musb;
  35 };
  36
  37 static void tusb_musb_set_vbus(struct musb *musb, int is_on);
  38
  39 #define TUSB_REV_MAJOR(reg_val)         ((reg_val >> 4) & 0xf)
  40 #define TUSB_REV_MINOR(reg_val)         (reg_val & 0xf)
  41
  42 /*
  43  * Checks the revision. We need to use the DMA register as 3.0 does not
  44  * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
  45  */
  46 u8 tusb_get_revision(struct musb *musb)
  47 {
  48         void __iomem    *tbase = musb->ctrl_base;
  49         u32             die_id;
  50         u8              rev;
  51
  52         rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
  53         if (TUSB_REV_MAJOR(rev) == 3) {
  54                 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
  55                                 TUSB_DIDR1_HI));
  56                 if (die_id >= TUSB_DIDR1_HI_REV_31)
  57                         rev |= 1;
  58         }
  59
  60         return rev;
  61 }
  62 EXPORT_SYMBOL_GPL(tusb_get_revision);
  63
  64 static int tusb_print_revision(struct musb *musb)
  65 {
  66         void __iomem    *tbase = musb->ctrl_base;
  67         u8              rev;
  68
  69         rev = tusb_get_revision(musb);
  70
  71         pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
  72                 "prcm",
  73                 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
  74                 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
  75                 "int",
  76                 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
  77                 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
  78                 "gpio",
  79                 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
  80                 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
  81                 "dma",
  82                 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
  83                 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
  84                 "dieid",
  85                 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
  86                 "rev",
  87                 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
  88
  89         return tusb_get_revision(musb);
  90 }
  91
  92 #define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
  93                                 | TUSB_PHY_OTG_CTRL_TESTM0)
  94
  95 /*
  96  * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
  97  * Disables power detection in PHY for the duration of idle.
  98  */
  99 static void tusb_wbus_quirk(struct musb *musb, int enabled)
 100 {
 101         void __iomem    *tbase = musb->ctrl_base;
 102         static u32      phy_otg_ctrl, phy_otg_ena;
 103         u32             tmp;
 104
 105         if (enabled) {
 106                 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
 107                 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
 108                 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
 109                                 | phy_otg_ena | WBUS_QUIRK_MASK;
 110                 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
 111                 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
 112                 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
 113                 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
 114                 dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
 115                         musb_readl(tbase, TUSB_PHY_OTG_CTRL),
 116                         musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
 117         } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
 118                                         & TUSB_PHY_OTG_CTRL_TESTM2) {
 119                 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
 120                 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
 121                 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
 122                 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
 123                 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
 124                         musb_readl(tbase, TUSB_PHY_OTG_CTRL),
 125                         musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
 126                 phy_otg_ctrl = 0;
 127                 phy_otg_ena = 0;
 128         }
 129 }
 130
 131 /*
 132  * TUSB 6010 may use a parallel bus that doesn't support byte ops;
 133  * so both loading and unloading FIFOs need explicit byte counts.
 134  */
 135
 136 static inline void
 137 tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
 138 {
 139         u32             val;
 140         int             i;
 141
 142         if (len > 4) {
 143                 for (i = 0; i < (len >> 2); i++) {
 144                         memcpy(&val, buf, 4);
 145                         musb_writel(fifo, 0, val);
 146                         buf += 4;
 147                 }
 148                 len %= 4;
 149         }
 150         if (len > 0) {
 151                 /* Write the rest 1 - 3 bytes to FIFO */
 152                 memcpy(&val, buf, len);
 153                 musb_writel(fifo, 0, val);
 154         }
 155 }
 156
 157 static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
 158                                                 void *buf, u16 len)
 159 {
 160         u32             val;
 161         int             i;
 162
 163         if (len > 4) {
 164                 for (i = 0; i < (len >> 2); i++) {
 165                         val = musb_readl(fifo, 0);
 166                         memcpy(buf, &val, 4);
 167                         buf += 4;
 168                 }
 169                 len %= 4;
 170         }
 171         if (len > 0) {
 172                 /* Read the rest 1 - 3 bytes from FIFO */
 173                 val = musb_readl(fifo, 0);
 174                 memcpy(buf, &val, len);
 175         }
 176 }
 177
 178 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
 179 {
 180         struct musb *musb = hw_ep->musb;
 181         void __iomem    *ep_conf = hw_ep->conf;
 182         void __iomem    *fifo = hw_ep->fifo;
 183         u8              epnum = hw_ep->epnum;
 184
 185         prefetch(buf);
 186
 187         dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
 188                         'T', epnum, fifo, len, buf);
 189
 190         if (epnum)
 191                 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
 192                         TUSB_EP_CONFIG_XFR_SIZE(len));
 193         else
 194                 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
 195                         TUSB_EP0_CONFIG_XFR_SIZE(len));
 196
 197         if (likely((0x01 & (unsigned long) buf) == 0)) {
 198
 199                 /* Best case is 32bit-aligned destination address */
 200                 if ((0x02 & (unsigned long) buf) == 0) {
 201                         if (len >= 4) {
 202                                 iowrite32_rep(fifo, buf, len >> 2);
 203                                 buf += (len & ~0x03);
 204                                 len &= 0x03;
 205                         }
 206                 } else {
 207                         if (len >= 2) {
 208                                 u32 val;
 209                                 int i;
 210
 211                                 /* Cannot use writesw, fifo is 32-bit */
 212                                 for (i = 0; i < (len >> 2); i++) {
 213                                         val = (u32)(*(u16 *)buf);
 214                                         buf += 2;
 215                                         val |= (*(u16 *)buf) << 16;
 216                                         buf += 2;
 217                                         musb_writel(fifo, 0, val);
 218                                 }
 219                                 len &= 0x03;
 220                         }
 221                 }
 222         }
 223
 224         if (len > 0)
 225                 tusb_fifo_write_unaligned(fifo, buf, len);
 226 }
 227
 228 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
 229 {
 230         struct musb *musb = hw_ep->musb;
 231         void __iomem    *ep_conf = hw_ep->conf;
 232         void __iomem    *fifo = hw_ep->fifo;
 233         u8              epnum = hw_ep->epnum;
 234
 235         dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
 236                         'R', epnum, fifo, len, buf);
 237
 238         if (epnum)
 239                 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
 240                         TUSB_EP_CONFIG_XFR_SIZE(len));
 241         else
 242                 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
 243
 244         if (likely((0x01 & (unsigned long) buf) == 0)) {
 245
 246                 /* Best case is 32bit-aligned destination address */
 247                 if ((0x02 & (unsigned long) buf) == 0) {
 248                         if (len >= 4) {
 249                                 ioread32_rep(fifo, buf, len >> 2);
 250                                 buf += (len & ~0x03);
 251                                 len &= 0x03;
 252                         }
 253                 } else {
 254                         if (len >= 2) {
 255                                 u32 val;
 256                                 int i;
 257
 258                                 /* Cannot use readsw, fifo is 32-bit */
 259                                 for (i = 0; i < (len >> 2); i++) {
 260                                         val = musb_readl(fifo, 0);
 261                                         *(u16 *)buf = (u16)(val & 0xffff);
 262                                         buf += 2;
 263                                         *(u16 *)buf = (u16)(val >> 16);
 264                                         buf += 2;
 265                                 }
 266                                 len &= 0x03;
 267                         }
 268                 }
 269         }
 270
 271         if (len > 0)
 272                 tusb_fifo_read_unaligned(fifo, buf, len);
 273 }
 274
 275 static struct musb *the_musb;
 276
 277 /* This is used by gadget drivers, and OTG transceiver logic, allowing
 278  * at most mA current to be drawn from VBUS during a Default-B session
 279  * (that is, while VBUS exceeds 4.4V).  In Default-A (including pure host
 280  * mode), or low power Default-B sessions, something else supplies power.
 281  * Caller must take care of locking.
 282  */
 283 static int tusb_draw_power(struct usb_phy *x, unsigned mA)
 284 {
 285         struct musb     *musb = the_musb;
 286         void __iomem    *tbase = musb->ctrl_base;
 287         u32             reg;
 288
 289         /* tps65030 seems to consume max 100mA, with maybe 60mA available
 290          * (measured on one board) for things other than tps and tusb.
 291          *
 292          * Boards sharing the CPU clock with CLKIN will need to prevent
 293          * certain idle sleep states while the USB link is active.
 294          *
 295          * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
 296          * The actual current usage would be very board-specific.  For now,
 297          * it's simpler to just use an aggregate (also board-specific).
 298          */
 299         if (x->otg->default_a || mA < (musb->min_power << 1))
 300                 mA = 0;
 301
 302         reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
 303         if (mA) {
 304                 musb->is_bus_powered = 1;
 305                 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
 306         } else {
 307                 musb->is_bus_powered = 0;
 308                 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
 309         }
 310         musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
 311
 312         dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
 313         return 0;
 314 }
 315
 316 /* workaround for issue 13:  change clock during chip idle
 317  * (to be fixed in rev3 silicon) ... symptoms include disconnect
 318  * or looping suspend/resume cycles
 319  */
 320 static void tusb_set_clock_source(struct musb *musb, unsigned mode)
 321 {
 322         void __iomem    *tbase = musb->ctrl_base;
 323         u32             reg;
 324
 325         reg = musb_readl(tbase, TUSB_PRCM_CONF);
 326         reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
 327
 328         /* 0 = refclk (clkin, XI)
 329          * 1 = PHY 60 MHz (internal PLL)
 330          * 2 = not supported
 331          * 3 = what?
 332          */
 333         if (mode > 0)
 334                 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
 335
 336         musb_writel(tbase, TUSB_PRCM_CONF, reg);
 337
 338         /* FIXME tusb6010_platform_retime(mode == 0); */
 339 }
 340
 341 /*
 342  * Idle TUSB6010 until next wake-up event; NOR access always wakes.
 343  * Other code ensures that we idle unless we're connected _and_ the
 344  * USB link is not suspended ... and tells us the relevant wakeup
 345  * events.  SW_EN for voltage is handled separately.
 346  */
 347 static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
 348 {
 349         void __iomem    *tbase = musb->ctrl_base;
 350         u32             reg;
 351
 352         if ((wakeup_enables & TUSB_PRCM_WBUS)
 353                         && (tusb_get_revision(musb) == TUSB_REV_30))
 354                 tusb_wbus_quirk(musb, 1);
 355
 356         tusb_set_clock_source(musb, 0);
 357
 358         wakeup_enables |= TUSB_PRCM_WNORCS;
 359         musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
 360
 361         /* REVISIT writeup of WID implies that if WID set and ID is grounded,
 362          * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
 363          * Presumably that's mostly to save power, hence WID is immaterial ...
 364          */
 365
 366         reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
 367         /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
 368         if (is_host_active(musb)) {
 369                 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
 370                 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
 371         } else {
 372                 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
 373                 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
 374         }
 375         reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
 376         musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
 377
 378         dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
 379 }
 380
 381 /*
 382  * Updates cable VBUS status. Caller must take care of locking.
 383  */
 384 static int tusb_musb_vbus_status(struct musb *musb)
 385 {
 386         void __iomem    *tbase = musb->ctrl_base;
 387         u32             otg_stat, prcm_mngmt;
 388         int             ret = 0;
 389
 390         otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 391         prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
 392
 393         /* Temporarily enable VBUS detection if it was disabled for
 394          * suspend mode. Unless it's enabled otg_stat and devctl will
 395          * not show correct VBUS state.
 396          */
 397         if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
 398                 u32 tmp = prcm_mngmt;
 399                 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
 400                 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
 401                 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 402                 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
 403         }
 404
 405         if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
 406                 ret = 1;
 407
 408         return ret;
 409 }
 410
 411 static struct timer_list musb_idle_timer;
 412
 413 static void musb_do_idle(unsigned long _musb)
 414 {
 415         struct musb     *musb = (void *)_musb;
 416         unsigned long   flags;
 417
 418         spin_lock_irqsave(&musb->lock, flags);
 419
 420         switch (musb->xceiv->state) {
 421         case OTG_STATE_A_WAIT_BCON:
 422                 if ((musb->a_wait_bcon != 0)
 423                         && (musb->idle_timeout == 0
 424                                 || time_after(jiffies, musb->idle_timeout))) {
 425                         dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
 426                                         usb_otg_state_string(musb->xceiv->state));
 427                 }
 428                 /* FALLTHROUGH */
 429         case OTG_STATE_A_IDLE:
 430                 tusb_musb_set_vbus(musb, 0);
 431         default:
 432                 break;
 433         }
 434
 435         if (!musb->is_active) {
 436                 u32     wakeups;
 437
 438                 /* wait until khubd handles port change status */
 439                 if (is_host_active(musb) && (musb->port1_status >> 16))
 440                         goto done;
 441
 442                 if (!musb->gadget_driver) {
 443                         wakeups = 0;
 444                 } else {
 445                         wakeups = TUSB_PRCM_WHOSTDISCON
 446                                 | TUSB_PRCM_WBUS
 447                                         | TUSB_PRCM_WVBUS;
 448                         wakeups |= TUSB_PRCM_WID;
 449                 }
 450                 tusb_allow_idle(musb, wakeups);
 451         }
 452 done:
 453         spin_unlock_irqrestore(&musb->lock, flags);
 454 }
 455
 456 /*
 457  * Maybe put TUSB6010 into idle mode mode depending on USB link status,
 458  * like "disconnected" or "suspended".  We'll be woken out of it by
 459  * connect, resume, or disconnect.
 460  *
 461  * Needs to be called as the last function everywhere where there is
 462  * register access to TUSB6010 because of NOR flash wake-up.
 463  * Caller should own controller spinlock.
 464  *
 465  * Delay because peripheral enables D+ pullup 3msec after SE0, and
 466  * we don't want to treat that full speed J as a wakeup event.
 467  * ... peripherals must draw only suspend current after 10 msec.
 468  */
 469 static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
 470 {
 471         unsigned long           default_timeout = jiffies + msecs_to_jiffies(3);
 472         static unsigned long    last_timer;
 473
 474         if (timeout == 0)
 475                 timeout = default_timeout;
 476
 477         /* Never idle if active, or when VBUS timeout is not set as host */
 478         if (musb->is_active || ((musb->a_wait_bcon == 0)
 479                         && (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
 480                 dev_dbg(musb->controller, "%s active, deleting timer\n",
 481                         usb_otg_state_string(musb->xceiv->state));
 482                 del_timer(&musb_idle_timer);
 483                 last_timer = jiffies;
 484                 return;
 485         }
 486
 487         if (time_after(last_timer, timeout)) {
 488                 if (!timer_pending(&musb_idle_timer))
 489                         last_timer = timeout;
 490                 else {
 491                         dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
 492                         return;
 493                 }
 494         }
 495         last_timer = timeout;
 496
 497         dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
 498                 usb_otg_state_string(musb->xceiv->state),
 499                 (unsigned long)jiffies_to_msecs(timeout - jiffies));
 500         mod_timer(&musb_idle_timer, timeout);
 501 }
 502
 503 /* ticks of 60 MHz clock */
 504 #define DEVCLOCK                60000000
 505 #define OTG_TIMER_MS(msecs)     ((msecs) \
 506                 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
 507                                 | TUSB_DEV_OTG_TIMER_ENABLE) \
 508                 : 0)
 509
 510 static void tusb_musb_set_vbus(struct musb *musb, int is_on)
 511 {
 512         void __iomem    *tbase = musb->ctrl_base;
 513         u32             conf, prcm, timer;
 514         u8              devctl;
 515         struct usb_otg  *otg = musb->xceiv->otg;
 516
 517         /* HDRC controls CPEN, but beware current surges during device
 518          * connect.  They can trigger transient overcurrent conditions
 519          * that must be ignored.
 520          */
 521
 522         prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
 523         conf = musb_readl(tbase, TUSB_DEV_CONF);
 524         devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 525
 526         if (is_on) {
 527                 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
 528                 otg->default_a = 1;
 529                 musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 530                 devctl |= MUSB_DEVCTL_SESSION;
 531
 532                 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
 533                 MUSB_HST_MODE(musb);
 534         } else {
 535                 u32     otg_stat;
 536
 537                 timer = 0;
 538
 539                 /* If ID pin is grounded, we want to be a_idle */
 540                 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 541                 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
 542                         switch (musb->xceiv->state) {
 543                         case OTG_STATE_A_WAIT_VRISE:
 544                         case OTG_STATE_A_WAIT_BCON:
 545                                 musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
 546                                 break;
 547                         case OTG_STATE_A_WAIT_VFALL:
 548                                 musb->xceiv->state = OTG_STATE_A_IDLE;
 549                                 break;
 550                         default:
 551                                 musb->xceiv->state = OTG_STATE_A_IDLE;
 552                         }
 553                         musb->is_active = 0;
 554                         otg->default_a = 1;
 555                         MUSB_HST_MODE(musb);
 556                 } else {
 557                         musb->is_active = 0;
 558                         otg->default_a = 0;
 559                         musb->xceiv->state = OTG_STATE_B_IDLE;
 560                         MUSB_DEV_MODE(musb);
 561                 }
 562
 563                 devctl &= ~MUSB_DEVCTL_SESSION;
 564                 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
 565         }
 566         prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
 567
 568         musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
 569         musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
 570         musb_writel(tbase, TUSB_DEV_CONF, conf);
 571         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 572
 573         dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
 574                 usb_otg_state_string(musb->xceiv->state),
 575                 musb_readb(musb->mregs, MUSB_DEVCTL),
 576                 musb_readl(tbase, TUSB_DEV_OTG_STAT),
 577                 conf, prcm);
 578 }
 579
 580 /*
 581  * Sets the mode to OTG, peripheral or host by changing the ID detection.
 582  * Caller must take care of locking.
 583  *
 584  * Note that if a mini-A cable is plugged in the ID line will stay down as
 585  * the weak ID pull-up is not able to pull the ID up.
 586  */
 587 static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
 588 {
 589         void __iomem    *tbase = musb->ctrl_base;
 590         u32             otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
 591
 592         otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 593         phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
 594         phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
 595         dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
 596
 597         switch (musb_mode) {
 598
 599         case MUSB_HOST:         /* Disable PHY ID detect, ground ID */
 600                 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 601                 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 602                 dev_conf |= TUSB_DEV_CONF_ID_SEL;
 603                 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
 604                 break;
 605         case MUSB_PERIPHERAL:   /* Disable PHY ID detect, keep ID pull-up on */
 606                 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 607                 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 608                 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
 609                 break;
 610         case MUSB_OTG:          /* Use PHY ID detection */
 611                 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 612                 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 613                 dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
 614                 break;
 615
 616         default:
 617                 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
 618                 return -EINVAL;
 619         }
 620
 621         musb_writel(tbase, TUSB_PHY_OTG_CTRL,
 622                         TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
 623         musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
 624                         TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
 625         musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
 626
 627         otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 628         if ((musb_mode == MUSB_PERIPHERAL) &&
 629                 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
 630                         INFO("Cannot be peripheral with mini-A cable "
 631                         "otg_stat: %08x\n", otg_stat);
 632
 633         return 0;
 634 }
 635
 636 static inline unsigned long
 637 tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
 638 {
 639         u32             otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 640         unsigned long   idle_timeout = 0;
 641         struct usb_otg  *otg = musb->xceiv->otg;
 642
 643         /* ID pin */
 644         if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
 645                 int     default_a;
 646
 647                 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
 648                 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
 649                 otg->default_a = default_a;
 650                 tusb_musb_set_vbus(musb, default_a);
 651
 652                 /* Don't allow idling immediately */
 653                 if (default_a)
 654                         idle_timeout = jiffies + (HZ * 3);
 655         }
 656
 657         /* VBUS state change */
 658         if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
 659
 660                 /* B-dev state machine:  no vbus ~= disconnect */
 661                 if (!otg->default_a) {
 662                         /* ? musb_root_disconnect(musb); */
 663                         musb->port1_status &=
 664                                 ~(USB_PORT_STAT_CONNECTION
 665                                 | USB_PORT_STAT_ENABLE
 666                                 | USB_PORT_STAT_LOW_SPEED
 667                                 | USB_PORT_STAT_HIGH_SPEED
 668                                 | USB_PORT_STAT_TEST
 669                                 );
 670
 671                         if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
 672                                 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
 673                                 if (musb->xceiv->state != OTG_STATE_B_IDLE) {
 674                                         /* INTR_DISCONNECT can hide... */
 675                                         musb->xceiv->state = OTG_STATE_B_IDLE;
 676                                         musb->int_usb |= MUSB_INTR_DISCONNECT;
 677                                 }
 678                                 musb->is_active = 0;
 679                         }
 680                         dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
 681                                 usb_otg_state_string(musb->xceiv->state), otg_stat);
 682                         idle_timeout = jiffies + (1 * HZ);
 683                         schedule_work(&musb->irq_work);
 684
 685                 } else /* A-dev state machine */ {
 686                         dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
 687                                 usb_otg_state_string(musb->xceiv->state), otg_stat);
 688
 689                         switch (musb->xceiv->state) {
 690                         case OTG_STATE_A_IDLE:
 691                                 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
 692                                 musb_platform_set_vbus(musb, 1);
 693
 694                                 /* CONNECT can wake if a_wait_bcon is set */
 695                                 if (musb->a_wait_bcon != 0)
 696                                         musb->is_active = 0;
 697                                 else
 698                                         musb->is_active = 1;
 699
 700                                 /*
 701                                  * OPT FS A TD.4.6 needs few seconds for
 702                                  * A_WAIT_VRISE
 703                                  */
 704                                 idle_timeout = jiffies + (2 * HZ);
 705
 706                                 break;
 707                         case OTG_STATE_A_WAIT_VRISE:
 708                                 /* ignore; A-session-valid < VBUS_VALID/2,
 709                                  * we monitor this with the timer
 710                                  */
 711                                 break;
 712                         case OTG_STATE_A_WAIT_VFALL:
 713                                 /* REVISIT this irq triggers during short
 714                                  * spikes caused by enumeration ...
 715                                  */
 716                                 if (musb->vbuserr_retry) {
 717                                         musb->vbuserr_retry--;
 718                                         tusb_musb_set_vbus(musb, 1);
 719                                 } else {
 720                                         musb->vbuserr_retry
 721                                                 = VBUSERR_RETRY_COUNT;
 722                                         tusb_musb_set_vbus(musb, 0);
 723                                 }
 724                                 break;
 725                         default:
 726                                 break;
 727                         }
 728                 }
 729         }
 730
 731         /* OTG timer expiration */
 732         if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
 733                 u8      devctl;
 734
 735                 dev_dbg(musb->controller, "%s timer, %03x\n",
 736                         usb_otg_state_string(musb->xceiv->state), otg_stat);
 737
 738                 switch (musb->xceiv->state) {
 739                 case OTG_STATE_A_WAIT_VRISE:
 740                         /* VBUS has probably been valid for a while now,
 741                          * but may well have bounced out of range a bit
 742                          */
 743                         devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 744                         if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
 745                                 if ((devctl & MUSB_DEVCTL_VBUS)
 746                                                 != MUSB_DEVCTL_VBUS) {
 747                                         dev_dbg(musb->controller, "devctl %02x\n", devctl);
 748                                         break;
 749                                 }
 750                                 musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
 751                                 musb->is_active = 0;
 752                                 idle_timeout = jiffies
 753                                         + msecs_to_jiffies(musb->a_wait_bcon);
 754                         } else {
 755                                 /* REVISIT report overcurrent to hub? */
 756                                 ERR("vbus too slow, devctl %02x\n", devctl);
 757                                 tusb_musb_set_vbus(musb, 0);
 758                         }
 759                         break;
 760                 case OTG_STATE_A_WAIT_BCON:
 761                         if (musb->a_wait_bcon != 0)
 762                                 idle_timeout = jiffies
 763                                         + msecs_to_jiffies(musb->a_wait_bcon);
 764                         break;
 765                 case OTG_STATE_A_SUSPEND:
 766                         break;
 767                 case OTG_STATE_B_WAIT_ACON:
 768                         break;
 769                 default:
 770                         break;
 771                 }
 772         }
 773         schedule_work(&musb->irq_work);
 774
 775         return idle_timeout;
 776 }
 777
 778 static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
 779 {
 780         struct musb     *musb = __hci;
 781         void __iomem    *tbase = musb->ctrl_base;
 782         unsigned long   flags, idle_timeout = 0;
 783         u32             int_mask, int_src;
 784
 785         spin_lock_irqsave(&musb->lock, flags);
 786
 787         /* Mask all interrupts to allow using both edge and level GPIO irq */
 788         int_mask = musb_readl(tbase, TUSB_INT_MASK);
 789         musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
 790
 791         int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
 792         dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
 793
 794         musb->int_usb = (u8) int_src;
 795
 796         /* Acknowledge wake-up source interrupts */
 797         if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
 798                 u32     reg;
 799                 u32     i;
 800
 801                 if (tusb_get_revision(musb) == TUSB_REV_30)
 802                         tusb_wbus_quirk(musb, 0);
 803
 804                 /* there are issues re-locking the PLL on wakeup ... */
 805
 806                 /* work around issue 8 */
 807                 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
 808                         musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
 809                         musb_writel(tbase, TUSB_SCRATCH_PAD, i);
 810                         reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
 811                         if (reg == i)
 812                                 break;
 813                         dev_dbg(musb->controller, "TUSB NOR not ready\n");
 814                 }
 815
 816                 /* work around issue 13 (2nd half) */
 817                 tusb_set_clock_source(musb, 1);
 818
 819                 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
 820                 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
 821                 if (reg & ~TUSB_PRCM_WNORCS) {
 822                         musb->is_active = 1;
 823                         schedule_work(&musb->irq_work);
 824                 }
 825                 dev_dbg(musb->controller, "wake %sactive %02x\n",
 826                                 musb->is_active ? "" : "in", reg);
 827
 828                 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
 829         }
 830
 831         if (int_src & TUSB_INT_SRC_USB_IP_CONN)
 832                 del_timer(&musb_idle_timer);
 833
 834         /* OTG state change reports (annoyingly) not issued by Mentor core */
 835         if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
 836                                 | TUSB_INT_SRC_OTG_TIMEOUT
 837                                 | TUSB_INT_SRC_ID_STATUS_CHNG))
 838                 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
 839
 840         /* TX dma callback must be handled here, RX dma callback is
 841          * handled in tusb_omap_dma_cb.
 842          */
 843         if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
 844                 u32     dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
 845                 u32     real_dma_src = musb_readl(tbase, TUSB_DMA_INT_MASK);
 846
 847                 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
 848                 real_dma_src = ~real_dma_src & dma_src;
 849                 if (tusb_dma_omap() && real_dma_src) {
 850                         int     tx_source = (real_dma_src & 0xffff);
 851                         int     i;
 852
 853                         for (i = 1; i <= 15; i++) {
 854                                 if (tx_source & (1 << i)) {
 855                                         dev_dbg(musb->controller, "completing ep%i %s\n", i, "tx");
 856                                         musb_dma_completion(musb, i, 1);
 857                                 }
 858                         }
 859                 }
 860                 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
 861         }
 862
 863         /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
 864         if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
 865                 u32     musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
 866
 867                 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
 868                 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
 869                 musb->int_tx = (musb_src & 0xffff);
 870         } else {
 871                 musb->int_rx = 0;
 872                 musb->int_tx = 0;
 873         }
 874
 875         if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
 876                 musb_interrupt(musb);
 877
 878         /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
 879         musb_writel(tbase, TUSB_INT_SRC_CLEAR,
 880                 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
 881
 882         tusb_musb_try_idle(musb, idle_timeout);
 883
 884         musb_writel(tbase, TUSB_INT_MASK, int_mask);
 885         spin_unlock_irqrestore(&musb->lock, flags);
 886
 887         return IRQ_HANDLED;
 888 }
 889
 890 static int dma_off;
 891
 892 /*
 893  * Enables TUSB6010. Caller must take care of locking.
 894  * REVISIT:
 895  * - Check what is unnecessary in MGC_HdrcStart()
 896  */
 897 static void tusb_musb_enable(struct musb *musb)
 898 {
 899         void __iomem    *tbase = musb->ctrl_base;
 900
 901         /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
 902          * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
 903         musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
 904
 905         /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
 906         musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
 907         musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
 908         musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
 909
 910         /* Clear all subsystem interrups */
 911         musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
 912         musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
 913         musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
 914
 915         /* Acknowledge pending interrupt(s) */
 916         musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
 917
 918         /* Only 0 clock cycles for minimum interrupt de-assertion time and
 919          * interrupt polarity active low seems to work reliably here */
 920         musb_writel(tbase, TUSB_INT_CTRL_CONF,
 921                         TUSB_INT_CTRL_CONF_INT_RELCYC(0));
 922
 923         irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
 924
 925         /* maybe force into the Default-A OTG state machine */
 926         if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
 927                         & TUSB_DEV_OTG_STAT_ID_STATUS))
 928                 musb_writel(tbase, TUSB_INT_SRC_SET,
 929                                 TUSB_INT_SRC_ID_STATUS_CHNG);
 930
 931         if (is_dma_capable() && dma_off)
 932                 printk(KERN_WARNING "%s %s: dma not reactivated\n",
 933                                 __FILE__, __func__);
 934         else
 935                 dma_off = 1;
 936 }
 937
 938 /*
 939  * Disables TUSB6010. Caller must take care of locking.
 940  */
 941 static void tusb_musb_disable(struct musb *musb)
 942 {
 943         void __iomem    *tbase = musb->ctrl_base;
 944
 945         /* FIXME stop DMA, IRQs, timers, ... */
 946
 947         /* disable all IRQs */
 948         musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
 949         musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
 950         musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
 951         musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
 952
 953         del_timer(&musb_idle_timer);
 954
 955         if (is_dma_capable() && !dma_off) {
 956                 printk(KERN_WARNING "%s %s: dma still active\n",
 957                                 __FILE__, __func__);
 958                 dma_off = 1;
 959         }
 960 }
 961
 962 /*
 963  * Sets up TUSB6010 CPU interface specific signals and registers
 964  * Note: Settings optimized for OMAP24xx
 965  */
 966 static void tusb_setup_cpu_interface(struct musb *musb)
 967 {
 968         void __iomem    *tbase = musb->ctrl_base;
 969
 970         /*
 971          * Disable GPIO[5:0] pullups (used as output DMA requests)
 972          * Don't disable GPIO[7:6] as they are needed for wake-up.
 973          */
 974         musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
 975
 976         /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
 977         musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
 978
 979         /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
 980         musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
 981
 982         /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
 983          * de-assertion time 2 system clocks p 62 */
 984         musb_writel(tbase, TUSB_DMA_REQ_CONF,
 985                 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
 986                 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
 987                 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
 988
 989         /* Set 0 wait count for synchronous burst access */
 990         musb_writel(tbase, TUSB_WAIT_COUNT, 1);
 991 }
 992
 993 static int tusb_musb_start(struct musb *musb)
 994 {
 995         void __iomem    *tbase = musb->ctrl_base;
 996         int             ret = 0;
 997         unsigned long   flags;
 998         u32             reg;
 999
1000         if (musb->board_set_power)
1001                 ret = musb->board_set_power(1);
1002         if (ret != 0) {
1003                 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1004                 return ret;
1005         }
1006
1007         spin_lock_irqsave(&musb->lock, flags);
1008
1009         if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1010                 TUSB_PROD_TEST_RESET_VAL) {
1011                 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1012                 goto err;
1013         }
1014
1015         ret = tusb_print_revision(musb);
1016         if (ret < 2) {
1017                 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
1018                                 ret);
1019                 goto err;
1020         }
1021
1022         /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1023          * NOR FLASH interface is used */
1024         musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1025
1026         /* Select PHY free running 60MHz as a system clock */
1027         tusb_set_clock_source(musb, 1);
1028
1029         /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1030          * power saving, enable VBus detect and session end comparators,
1031          * enable IDpullup, enable VBus charging */
1032         musb_writel(tbase, TUSB_PRCM_MNGMT,
1033                 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1034                 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1035                 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1036                 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1037                 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1038         tusb_setup_cpu_interface(musb);
1039
1040         /* simplify:  always sense/pullup ID pins, as if in OTG mode */
1041         reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1042         reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1043         musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1044
1045         reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1046         reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1047         musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1048
1049         spin_unlock_irqrestore(&musb->lock, flags);
1050
1051         return 0;
1052
1053 err:
1054         spin_unlock_irqrestore(&musb->lock, flags);
1055
1056         if (musb->board_set_power)
1057                 musb->board_set_power(0);
1058
1059         return -ENODEV;
1060 }
1061
1062 static int tusb_musb_init(struct musb *musb)
1063 {
1064         struct platform_device  *pdev;
1065         struct resource         *mem;
1066         void __iomem            *sync = NULL;
1067         int                     ret;
1068
1069         usb_nop_xceiv_register();
1070         musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
1071         if (IS_ERR_OR_NULL(musb->xceiv))
1072                 return -EPROBE_DEFER;
1073
1074         pdev = to_platform_device(musb->controller);
1075
1076         /* dma address for async dma */
1077         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1078         musb->async = mem->start;
1079
1080         /* dma address for sync dma */
1081         mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1082         if (!mem) {
1083                 pr_debug("no sync dma resource?\n");
1084                 ret = -ENODEV;
1085                 goto done;
1086         }
1087         musb->sync = mem->start;
1088
1089         sync = ioremap(mem->start, resource_size(mem));
1090         if (!sync) {
1091                 pr_debug("ioremap for sync failed\n");
1092                 ret = -ENOMEM;
1093                 goto done;
1094         }
1095         musb->sync_va = sync;
1096
1097         /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1098          * FIFOs at 0x600, TUSB at 0x800
1099          */
1100         musb->mregs += TUSB_BASE_OFFSET;
1101
1102         ret = tusb_musb_start(musb);
1103         if (ret) {
1104                 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1105                                 ret);
1106                 goto done;
1107         }
1108         musb->isr = tusb_musb_interrupt;
1109
1110         musb->xceiv->set_power = tusb_draw_power;
1111         the_musb = musb;
1112
1113         setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
1114
1115 done:
1116         if (ret < 0) {
1117                 if (sync)
1118                         iounmap(sync);
1119
1120                 usb_put_phy(musb->xceiv);
1121                 usb_nop_xceiv_unregister();
1122         }
1123         return ret;
1124 }
1125
1126 static int tusb_musb_exit(struct musb *musb)
1127 {
1128         del_timer_sync(&musb_idle_timer);
1129         the_musb = NULL;
1130
1131         if (musb->board_set_power)
1132                 musb->board_set_power(0);
1133
1134         iounmap(musb->sync_va);
1135
1136         usb_put_phy(musb->xceiv);
1137         usb_nop_xceiv_unregister();
1138         return 0;
1139 }
1140
1141 static const struct musb_platform_ops tusb_ops = {
1142         .init           = tusb_musb_init,
1143         .exit           = tusb_musb_exit,
1144
1145         .enable         = tusb_musb_enable,
1146         .disable        = tusb_musb_disable,
1147
1148         .set_mode       = tusb_musb_set_mode,
1149         .try_idle       = tusb_musb_try_idle,
1150
1151         .vbus_status    = tusb_musb_vbus_status,
1152         .set_vbus       = tusb_musb_set_vbus,
1153 };
1154
1155 static u64 tusb_dmamask = DMA_BIT_MASK(32);
1156
1157 static int tusb_probe(struct platform_device *pdev)
1158 {
1159         struct resource musb_resources[2];
1160         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
1161         struct platform_device          *musb;
1162         struct tusb6010_glue            *glue;
1163
1164         int                             ret = -ENOMEM;
1165
1166         glue = kzalloc(sizeof(*glue), GFP_KERNEL);
1167         if (!glue) {
1168                 dev_err(&pdev->dev, "failed to allocate glue context\n");
1169                 goto err0;
1170         }
1171
1172         musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
1173         if (!musb) {
1174                 dev_err(&pdev->dev, "failed to allocate musb device\n");
1175                 goto err1;
1176         }
1177
1178         musb->dev.parent                = &pdev->dev;
1179         musb->dev.dma_mask              = &tusb_dmamask;
1180         musb->dev.coherent_dma_mask     = tusb_dmamask;
1181
1182         glue->dev                       = &pdev->dev;
1183         glue->musb                      = musb;
1184
1185         pdata->platform_ops             = &tusb_ops;
1186
1187         platform_set_drvdata(pdev, glue);
1188
1189         memset(musb_resources, 0x00, sizeof(*musb_resources) *
1190                         ARRAY_SIZE(musb_resources));
1191
1192         musb_resources[0].name = pdev->resource[0].name;
1193         musb_resources[0].start = pdev->resource[0].start;
1194         musb_resources[0].end = pdev->resource[0].end;
1195         musb_resources[0].flags = pdev->resource[0].flags;
1196
1197         musb_resources[1].name = pdev->resource[1].name;
1198         musb_resources[1].start = pdev->resource[1].start;
1199         musb_resources[1].end = pdev->resource[1].end;
1200         musb_resources[1].flags = pdev->resource[1].flags;
1201
1202         ret = platform_device_add_resources(musb, musb_resources,
1203                         ARRAY_SIZE(musb_resources));
1204         if (ret) {
1205                 dev_err(&pdev->dev, "failed to add resources\n");
1206                 goto err3;
1207         }
1208
1209         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
1210         if (ret) {
1211                 dev_err(&pdev->dev, "failed to add platform_data\n");
1212                 goto err3;
1213         }
1214
1215         ret = platform_device_add(musb);
1216         if (ret) {
1217                 dev_err(&pdev->dev, "failed to register musb device\n");
1218                 goto err3;
1219         }
1220
1221         return 0;
1222
1223 err3:
1224         platform_device_put(musb);
1225
1226 err1:
1227         kfree(glue);
1228
1229 err0:
1230         return ret;
1231 }
1232
1233 static int tusb_remove(struct platform_device *pdev)
1234 {
1235         struct tusb6010_glue            *glue = platform_get_drvdata(pdev);
1236
1237         platform_device_unregister(glue->musb);
1238         kfree(glue);
1239
1240         return 0;
1241 }
1242
1243 static struct platform_driver tusb_driver = {
1244         .probe          = tusb_probe,
1245         .remove         = tusb_remove,
1246         .driver         = {
1247                 .name   = "musb-tusb",
1248         },
1249 };
1250
1251 MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1252 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1253 MODULE_LICENSE("GPL v2");
1254 module_platform_driver(tusb_driver);