drivers/usb/musb/tusb6010.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * TUSB6010 USB 2.0 OTG Dual Role controller
   4  *
   5  * Copyright (C) 2006 Nokia Corporation
   6  * Tony Lindgren <tony@atomide.com>
   7  *
   8  * Notes:
   9  * - Driver assumes that interface to external host (main CPU) is
  10  *   configured for NOR FLASH interface instead of VLYNQ serial
  11  *   interface.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/errno.h>
  17 #include <linux/err.h>
  18 #include <linux/prefetch.h>
  19 #include <linux/usb.h>
  20 #include <linux/irq.h>
  21 #include <linux/io.h>
  22 #include <linux/device.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/usb/usb_phy_generic.h>
  26
  27 #include "musb_core.h"
  28
  29 struct tusb6010_glue {
  30         struct device           *dev;
  31         struct platform_device  *musb;
  32         struct platform_device  *phy;
  33 };
  34
  35 static void tusb_musb_set_vbus(struct musb *musb, int is_on);
  36
  37 #define TUSB_REV_MAJOR(reg_val)         ((reg_val >> 4) & 0xf)
  38 #define TUSB_REV_MINOR(reg_val)         (reg_val & 0xf)
  39
  40 /*
  41  * Checks the revision. We need to use the DMA register as 3.0 does not
  42  * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.
  43  */
  44 static u8 tusb_get_revision(struct musb *musb)
  45 {
  46         void __iomem    *tbase = musb->ctrl_base;
  47         u32             die_id;
  48         u8              rev;
  49
  50         rev = musb_readl(tbase, TUSB_DMA_CTRL_REV) & 0xff;
  51         if (TUSB_REV_MAJOR(rev) == 3) {
  52                 die_id = TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase,
  53                                 TUSB_DIDR1_HI));
  54                 if (die_id >= TUSB_DIDR1_HI_REV_31)
  55                         rev |= 1;
  56         }
  57
  58         return rev;
  59 }
  60
  61 static void tusb_print_revision(struct musb *musb)
  62 {
  63         void __iomem    *tbase = musb->ctrl_base;
  64         u8              rev;
  65
  66         rev = musb->tusb_revision;
  67
  68         pr_info("tusb: %s%i.%i %s%i.%i %s%i.%i %s%i.%i %s%i %s%i.%i\n",
  69                 "prcm",
  70                 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_PRCM_REV)),
  71                 TUSB_REV_MINOR(musb_readl(tbase, TUSB_PRCM_REV)),
  72                 "int",
  73                 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
  74                 TUSB_REV_MINOR(musb_readl(tbase, TUSB_INT_CTRL_REV)),
  75                 "gpio",
  76                 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_GPIO_REV)),
  77                 TUSB_REV_MINOR(musb_readl(tbase, TUSB_GPIO_REV)),
  78                 "dma",
  79                 TUSB_REV_MAJOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
  80                 TUSB_REV_MINOR(musb_readl(tbase, TUSB_DMA_CTRL_REV)),
  81                 "dieid",
  82                 TUSB_DIDR1_HI_CHIP_REV(musb_readl(tbase, TUSB_DIDR1_HI)),
  83                 "rev",
  84                 TUSB_REV_MAJOR(rev), TUSB_REV_MINOR(rev));
  85 }
  86
  87 #define WBUS_QUIRK_MASK (TUSB_PHY_OTG_CTRL_TESTM2 | TUSB_PHY_OTG_CTRL_TESTM1 \
  88                                 | TUSB_PHY_OTG_CTRL_TESTM0)
  89
  90 /*
  91  * Workaround for spontaneous WBUS wake-up issue #2 for tusb3.0.
  92  * Disables power detection in PHY for the duration of idle.
  93  */
  94 static void tusb_wbus_quirk(struct musb *musb, int enabled)
  95 {
  96         void __iomem    *tbase = musb->ctrl_base;
  97         static u32      phy_otg_ctrl, phy_otg_ena;
  98         u32             tmp;
  99
 100         if (enabled) {
 101                 phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
 102                 phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
 103                 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT
 104                                 | phy_otg_ena | WBUS_QUIRK_MASK;
 105                 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
 106                 tmp = phy_otg_ena & ~WBUS_QUIRK_MASK;
 107                 tmp |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_TESTM2;
 108                 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
 109                 dev_dbg(musb->controller, "Enabled tusb wbus quirk ctrl %08x ena %08x\n",
 110                         musb_readl(tbase, TUSB_PHY_OTG_CTRL),
 111                         musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
 112         } else if (musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE)
 113                                         & TUSB_PHY_OTG_CTRL_TESTM2) {
 114                 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl;
 115                 musb_writel(tbase, TUSB_PHY_OTG_CTRL, tmp);
 116                 tmp = TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena;
 117                 musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, tmp);
 118                 dev_dbg(musb->controller, "Disabled tusb wbus quirk ctrl %08x ena %08x\n",
 119                         musb_readl(tbase, TUSB_PHY_OTG_CTRL),
 120                         musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE));
 121                 phy_otg_ctrl = 0;
 122                 phy_otg_ena = 0;
 123         }
 124 }
 125
 126 static u32 tusb_fifo_offset(u8 epnum)
 127 {
 128         return 0x200 + (epnum * 0x20);
 129 }
 130
 131 static u32 tusb_ep_offset(u8 epnum, u16 offset)
 132 {
 133         return 0x10 + offset;
 134 }
 135
 136 /* TUSB mapping: "flat" plus ep0 special cases */
 137 static void tusb_ep_select(void __iomem *mbase, u8 epnum)
 138 {
 139         musb_writeb(mbase, MUSB_INDEX, epnum);
 140 }
 141
 142 /*
 143  * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
 144  */
 145 static u8 tusb_readb(void __iomem *addr, u32 offset)
 146 {
 147         u16 tmp;
 148         u8 val;
 149
 150         tmp = __raw_readw(addr + (offset & ~1));
 151         if (offset & 1)
 152                 val = (tmp >> 8);
 153         else
 154                 val = tmp & 0xff;
 155
 156         return val;
 157 }
 158
 159 static void tusb_writeb(void __iomem *addr, u32 offset, u8 data)
 160 {
 161         u16 tmp;
 162
 163         tmp = __raw_readw(addr + (offset & ~1));
 164         if (offset & 1)
 165                 tmp = (data << 8) | (tmp & 0xff);
 166         else
 167                 tmp = (tmp & 0xff00) | data;
 168
 169         __raw_writew(tmp, addr + (offset & ~1));
 170 }
 171
 172 /*
 173  * TUSB 6010 may use a parallel bus that doesn't support byte ops;
 174  * so both loading and unloading FIFOs need explicit byte counts.
 175  */
 176
 177 static inline void
 178 tusb_fifo_write_unaligned(void __iomem *fifo, const u8 *buf, u16 len)
 179 {
 180         u32             val;
 181         int             i;
 182
 183         if (len > 4) {
 184                 for (i = 0; i < (len >> 2); i++) {
 185                         memcpy(&val, buf, 4);
 186                         musb_writel(fifo, 0, val);
 187                         buf += 4;
 188                 }
 189                 len %= 4;
 190         }
 191         if (len > 0) {
 192                 /* Write the rest 1 - 3 bytes to FIFO */
 193                 val = 0;
 194                 memcpy(&val, buf, len);
 195                 musb_writel(fifo, 0, val);
 196         }
 197 }
 198
 199 static inline void tusb_fifo_read_unaligned(void __iomem *fifo,
 200                                                 void *buf, u16 len)
 201 {
 202         u32             val;
 203         int             i;
 204
 205         if (len > 4) {
 206                 for (i = 0; i < (len >> 2); i++) {
 207                         val = musb_readl(fifo, 0);
 208                         memcpy(buf, &val, 4);
 209                         buf += 4;
 210                 }
 211                 len %= 4;
 212         }
 213         if (len > 0) {
 214                 /* Read the rest 1 - 3 bytes from FIFO */
 215                 val = musb_readl(fifo, 0);
 216                 memcpy(buf, &val, len);
 217         }
 218 }
 219
 220 static void tusb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf)
 221 {
 222         struct musb *musb = hw_ep->musb;
 223         void __iomem    *ep_conf = hw_ep->conf;
 224         void __iomem    *fifo = hw_ep->fifo;
 225         u8              epnum = hw_ep->epnum;
 226
 227         prefetch(buf);
 228
 229         dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
 230                         'T', epnum, fifo, len, buf);
 231
 232         if (epnum)
 233                 musb_writel(ep_conf, TUSB_EP_TX_OFFSET,
 234                         TUSB_EP_CONFIG_XFR_SIZE(len));
 235         else
 236                 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_DIR_TX |
 237                         TUSB_EP0_CONFIG_XFR_SIZE(len));
 238
 239         if (likely((0x01 & (unsigned long) buf) == 0)) {
 240
 241                 /* Best case is 32bit-aligned destination address */
 242                 if ((0x02 & (unsigned long) buf) == 0) {
 243                         if (len >= 4) {
 244                                 iowrite32_rep(fifo, buf, len >> 2);
 245                                 buf += (len & ~0x03);
 246                                 len &= 0x03;
 247                         }
 248                 } else {
 249                         if (len >= 2) {
 250                                 u32 val;
 251                                 int i;
 252
 253                                 /* Cannot use writesw, fifo is 32-bit */
 254                                 for (i = 0; i < (len >> 2); i++) {
 255                                         val = (u32)(*(u16 *)buf);
 256                                         buf += 2;
 257                                         val |= (*(u16 *)buf) << 16;
 258                                         buf += 2;
 259                                         musb_writel(fifo, 0, val);
 260                                 }
 261                                 len &= 0x03;
 262                         }
 263                 }
 264         }
 265
 266         if (len > 0)
 267                 tusb_fifo_write_unaligned(fifo, buf, len);
 268 }
 269
 270 static void tusb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
 271 {
 272         struct musb *musb = hw_ep->musb;
 273         void __iomem    *ep_conf = hw_ep->conf;
 274         void __iomem    *fifo = hw_ep->fifo;
 275         u8              epnum = hw_ep->epnum;
 276
 277         dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
 278                         'R', epnum, fifo, len, buf);
 279
 280         if (epnum)
 281                 musb_writel(ep_conf, TUSB_EP_RX_OFFSET,
 282                         TUSB_EP_CONFIG_XFR_SIZE(len));
 283         else
 284                 musb_writel(ep_conf, 0, TUSB_EP0_CONFIG_XFR_SIZE(len));
 285
 286         if (likely((0x01 & (unsigned long) buf) == 0)) {
 287
 288                 /* Best case is 32bit-aligned destination address */
 289                 if ((0x02 & (unsigned long) buf) == 0) {
 290                         if (len >= 4) {
 291                                 ioread32_rep(fifo, buf, len >> 2);
 292                                 buf += (len & ~0x03);
 293                                 len &= 0x03;
 294                         }
 295                 } else {
 296                         if (len >= 2) {
 297                                 u32 val;
 298                                 int i;
 299
 300                                 /* Cannot use readsw, fifo is 32-bit */
 301                                 for (i = 0; i < (len >> 2); i++) {
 302                                         val = musb_readl(fifo, 0);
 303                                         *(u16 *)buf = (u16)(val & 0xffff);
 304                                         buf += 2;
 305                                         *(u16 *)buf = (u16)(val >> 16);
 306                                         buf += 2;
 307                                 }
 308                                 len &= 0x03;
 309                         }
 310                 }
 311         }
 312
 313         if (len > 0)
 314                 tusb_fifo_read_unaligned(fifo, buf, len);
 315 }
 316
 317 static struct musb *the_musb;
 318
 319 /* This is used by gadget drivers, and OTG transceiver logic, allowing
 320  * at most mA current to be drawn from VBUS during a Default-B session
 321  * (that is, while VBUS exceeds 4.4V).  In Default-A (including pure host
 322  * mode), or low power Default-B sessions, something else supplies power.
 323  * Caller must take care of locking.
 324  */
 325 static int tusb_draw_power(struct usb_phy *x, unsigned mA)
 326 {
 327         struct musb     *musb = the_musb;
 328         void __iomem    *tbase = musb->ctrl_base;
 329         u32             reg;
 330
 331         /* tps65030 seems to consume max 100mA, with maybe 60mA available
 332          * (measured on one board) for things other than tps and tusb.
 333          *
 334          * Boards sharing the CPU clock with CLKIN will need to prevent
 335          * certain idle sleep states while the USB link is active.
 336          *
 337          * REVISIT we could use VBUS to supply only _one_ of { 1.5V, 3.3V }.
 338          * The actual current usage would be very board-specific.  For now,
 339          * it's simpler to just use an aggregate (also board-specific).
 340          */
 341         if (x->otg->default_a || mA < (musb->min_power << 1))
 342                 mA = 0;
 343
 344         reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
 345         if (mA) {
 346                 musb->is_bus_powered = 1;
 347                 reg |= TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN;
 348         } else {
 349                 musb->is_bus_powered = 0;
 350                 reg &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
 351         }
 352         musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
 353
 354         dev_dbg(musb->controller, "draw max %d mA VBUS\n", mA);
 355         return 0;
 356 }
 357
 358 /* workaround for issue 13:  change clock during chip idle
 359  * (to be fixed in rev3 silicon) ... symptoms include disconnect
 360  * or looping suspend/resume cycles
 361  */
 362 static void tusb_set_clock_source(struct musb *musb, unsigned mode)
 363 {
 364         void __iomem    *tbase = musb->ctrl_base;
 365         u32             reg;
 366
 367         reg = musb_readl(tbase, TUSB_PRCM_CONF);
 368         reg &= ~TUSB_PRCM_CONF_SYS_CLKSEL(0x3);
 369
 370         /* 0 = refclk (clkin, XI)
 371          * 1 = PHY 60 MHz (internal PLL)
 372          * 2 = not supported
 373          * 3 = what?
 374          */
 375         if (mode > 0)
 376                 reg |= TUSB_PRCM_CONF_SYS_CLKSEL(mode & 0x3);
 377
 378         musb_writel(tbase, TUSB_PRCM_CONF, reg);
 379
 380         /* FIXME tusb6010_platform_retime(mode == 0); */
 381 }
 382
 383 /*
 384  * Idle TUSB6010 until next wake-up event; NOR access always wakes.
 385  * Other code ensures that we idle unless we're connected _and_ the
 386  * USB link is not suspended ... and tells us the relevant wakeup
 387  * events.  SW_EN for voltage is handled separately.
 388  */
 389 static void tusb_allow_idle(struct musb *musb, u32 wakeup_enables)
 390 {
 391         void __iomem    *tbase = musb->ctrl_base;
 392         u32             reg;
 393
 394         if ((wakeup_enables & TUSB_PRCM_WBUS)
 395                         && (musb->tusb_revision == TUSB_REV_30))
 396                 tusb_wbus_quirk(musb, 1);
 397
 398         tusb_set_clock_source(musb, 0);
 399
 400         wakeup_enables |= TUSB_PRCM_WNORCS;
 401         musb_writel(tbase, TUSB_PRCM_WAKEUP_MASK, ~wakeup_enables);
 402
 403         /* REVISIT writeup of WID implies that if WID set and ID is grounded,
 404          * TUSB_PHY_OTG_CTRL.TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP must be cleared.
 405          * Presumably that's mostly to save power, hence WID is immaterial ...
 406          */
 407
 408         reg = musb_readl(tbase, TUSB_PRCM_MNGMT);
 409         /* issue 4: when driving vbus, use hipower (vbus_det) comparator */
 410         if (is_host_active(musb)) {
 411                 reg |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
 412                 reg &= ~TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
 413         } else {
 414                 reg |= TUSB_PRCM_MNGMT_OTG_SESS_END_EN;
 415                 reg &= ~TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
 416         }
 417         reg |= TUSB_PRCM_MNGMT_PM_IDLE | TUSB_PRCM_MNGMT_DEV_IDLE;
 418         musb_writel(tbase, TUSB_PRCM_MNGMT, reg);
 419
 420         dev_dbg(musb->controller, "idle, wake on %02x\n", wakeup_enables);
 421 }
 422
 423 /*
 424  * Updates cable VBUS status. Caller must take care of locking.
 425  */
 426 static int tusb_musb_vbus_status(struct musb *musb)
 427 {
 428         void __iomem    *tbase = musb->ctrl_base;
 429         u32             otg_stat, prcm_mngmt;
 430         int             ret = 0;
 431
 432         otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 433         prcm_mngmt = musb_readl(tbase, TUSB_PRCM_MNGMT);
 434
 435         /* Temporarily enable VBUS detection if it was disabled for
 436          * suspend mode. Unless it's enabled otg_stat and devctl will
 437          * not show correct VBUS state.
 438          */
 439         if (!(prcm_mngmt & TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN)) {
 440                 u32 tmp = prcm_mngmt;
 441                 tmp |= TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN;
 442                 musb_writel(tbase, TUSB_PRCM_MNGMT, tmp);
 443                 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 444                 musb_writel(tbase, TUSB_PRCM_MNGMT, prcm_mngmt);
 445         }
 446
 447         if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID)
 448                 ret = 1;
 449
 450         return ret;
 451 }
 452
 453 static void musb_do_idle(struct timer_list *t)
 454 {
 455         struct musb     *musb = from_timer(musb, t, dev_timer);
 456         unsigned long   flags;
 457
 458         spin_lock_irqsave(&musb->lock, flags);
 459
 460         switch (musb->xceiv->otg->state) {
 461         case OTG_STATE_A_WAIT_BCON:
 462                 if ((musb->a_wait_bcon != 0)
 463                         && (musb->idle_timeout == 0
 464                                 || time_after(jiffies, musb->idle_timeout))) {
 465                         dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
 466                                         usb_otg_state_string(musb->xceiv->otg->state));
 467                 }
 468                 fallthrough;
 469         case OTG_STATE_A_IDLE:
 470                 tusb_musb_set_vbus(musb, 0);
 471                 break;
 472         default:
 473                 break;
 474         }
 475
 476         if (!musb->is_active) {
 477                 u32     wakeups;
 478
 479                 /* wait until hub_wq handles port change status */
 480                 if (is_host_active(musb) && (musb->port1_status >> 16))
 481                         goto done;
 482
 483                 if (!musb->gadget_driver) {
 484                         wakeups = 0;
 485                 } else {
 486                         wakeups = TUSB_PRCM_WHOSTDISCON
 487                                 | TUSB_PRCM_WBUS
 488                                         | TUSB_PRCM_WVBUS;
 489                         wakeups |= TUSB_PRCM_WID;
 490                 }
 491                 tusb_allow_idle(musb, wakeups);
 492         }
 493 done:
 494         spin_unlock_irqrestore(&musb->lock, flags);
 495 }
 496
 497 /*
 498  * Maybe put TUSB6010 into idle mode mode depending on USB link status,
 499  * like "disconnected" or "suspended".  We'll be woken out of it by
 500  * connect, resume, or disconnect.
 501  *
 502  * Needs to be called as the last function everywhere where there is
 503  * register access to TUSB6010 because of NOR flash wake-up.
 504  * Caller should own controller spinlock.
 505  *
 506  * Delay because peripheral enables D+ pullup 3msec after SE0, and
 507  * we don't want to treat that full speed J as a wakeup event.
 508  * ... peripherals must draw only suspend current after 10 msec.
 509  */
 510 static void tusb_musb_try_idle(struct musb *musb, unsigned long timeout)
 511 {
 512         unsigned long           default_timeout = jiffies + msecs_to_jiffies(3);
 513         static unsigned long    last_timer;
 514
 515         if (timeout == 0)
 516                 timeout = default_timeout;
 517
 518         /* Never idle if active, or when VBUS timeout is not set as host */
 519         if (musb->is_active || ((musb->a_wait_bcon == 0)
 520                         && (musb->xceiv->otg->state == OTG_STATE_A_WAIT_BCON))) {
 521                 dev_dbg(musb->controller, "%s active, deleting timer\n",
 522                         usb_otg_state_string(musb->xceiv->otg->state));
 523                 del_timer(&musb->dev_timer);
 524                 last_timer = jiffies;
 525                 return;
 526         }
 527
 528         if (time_after(last_timer, timeout)) {
 529                 if (!timer_pending(&musb->dev_timer))
 530                         last_timer = timeout;
 531                 else {
 532                         dev_dbg(musb->controller, "Longer idle timer already pending, ignoring\n");
 533                         return;
 534                 }
 535         }
 536         last_timer = timeout;
 537
 538         dev_dbg(musb->controller, "%s inactive, for idle timer for %lu ms\n",
 539                 usb_otg_state_string(musb->xceiv->otg->state),
 540                 (unsigned long)jiffies_to_msecs(timeout - jiffies));
 541         mod_timer(&musb->dev_timer, timeout);
 542 }
 543
 544 /* ticks of 60 MHz clock */
 545 #define DEVCLOCK                60000000
 546 #define OTG_TIMER_MS(msecs)     ((msecs) \
 547                 ? (TUSB_DEV_OTG_TIMER_VAL((DEVCLOCK/1000)*(msecs)) \
 548                                 | TUSB_DEV_OTG_TIMER_ENABLE) \
 549                 : 0)
 550
 551 static void tusb_musb_set_vbus(struct musb *musb, int is_on)
 552 {
 553         void __iomem    *tbase = musb->ctrl_base;
 554         u32             conf, prcm, timer;
 555         u8              devctl;
 556         struct usb_otg  *otg = musb->xceiv->otg;
 557
 558         /* HDRC controls CPEN, but beware current surges during device
 559          * connect.  They can trigger transient overcurrent conditions
 560          * that must be ignored.
 561          */
 562
 563         prcm = musb_readl(tbase, TUSB_PRCM_MNGMT);
 564         conf = musb_readl(tbase, TUSB_DEV_CONF);
 565         devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 566
 567         if (is_on) {
 568                 timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
 569                 otg->default_a = 1;
 570                 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
 571                 devctl |= MUSB_DEVCTL_SESSION;
 572
 573                 conf |= TUSB_DEV_CONF_USB_HOST_MODE;
 574                 MUSB_HST_MODE(musb);
 575         } else {
 576                 u32     otg_stat;
 577
 578                 timer = 0;
 579
 580                 /* If ID pin is grounded, we want to be a_idle */
 581                 otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 582                 if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
 583                         switch (musb->xceiv->otg->state) {
 584                         case OTG_STATE_A_WAIT_VRISE:
 585                         case OTG_STATE_A_WAIT_BCON:
 586                                 musb->xceiv->otg->state = OTG_STATE_A_WAIT_VFALL;
 587                                 break;
 588                         case OTG_STATE_A_WAIT_VFALL:
 589                                 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
 590                                 break;
 591                         default:
 592                                 musb->xceiv->otg->state = OTG_STATE_A_IDLE;
 593                         }
 594                         musb->is_active = 0;
 595                         otg->default_a = 1;
 596                         MUSB_HST_MODE(musb);
 597                 } else {
 598                         musb->is_active = 0;
 599                         otg->default_a = 0;
 600                         musb->xceiv->otg->state = OTG_STATE_B_IDLE;
 601                         MUSB_DEV_MODE(musb);
 602                 }
 603
 604                 devctl &= ~MUSB_DEVCTL_SESSION;
 605                 conf &= ~TUSB_DEV_CONF_USB_HOST_MODE;
 606         }
 607         prcm &= ~(TUSB_PRCM_MNGMT_15_SW_EN | TUSB_PRCM_MNGMT_33_SW_EN);
 608
 609         musb_writel(tbase, TUSB_PRCM_MNGMT, prcm);
 610         musb_writel(tbase, TUSB_DEV_OTG_TIMER, timer);
 611         musb_writel(tbase, TUSB_DEV_CONF, conf);
 612         musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 613
 614         dev_dbg(musb->controller, "VBUS %s, devctl %02x otg %3x conf %08x prcm %08x\n",
 615                 usb_otg_state_string(musb->xceiv->otg->state),
 616                 musb_readb(musb->mregs, MUSB_DEVCTL),
 617                 musb_readl(tbase, TUSB_DEV_OTG_STAT),
 618                 conf, prcm);
 619 }
 620
 621 /*
 622  * Sets the mode to OTG, peripheral or host by changing the ID detection.
 623  * Caller must take care of locking.
 624  *
 625  * Note that if a mini-A cable is plugged in the ID line will stay down as
 626  * the weak ID pull-up is not able to pull the ID up.
 627  */
 628 static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
 629 {
 630         void __iomem    *tbase = musb->ctrl_base;
 631         u32             otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
 632
 633         otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 634         phy_otg_ctrl = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
 635         phy_otg_ena = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
 636         dev_conf = musb_readl(tbase, TUSB_DEV_CONF);
 637
 638         switch (musb_mode) {
 639
 640         case MUSB_HOST:         /* Disable PHY ID detect, ground ID */
 641                 phy_otg_ctrl &= ~TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 642                 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 643                 dev_conf |= TUSB_DEV_CONF_ID_SEL;
 644                 dev_conf &= ~TUSB_DEV_CONF_SOFT_ID;
 645                 break;
 646         case MUSB_PERIPHERAL:   /* Disable PHY ID detect, keep ID pull-up on */
 647                 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 648                 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 649                 dev_conf |= (TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
 650                 break;
 651         case MUSB_OTG:          /* Use PHY ID detection */
 652                 phy_otg_ctrl |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 653                 phy_otg_ena |= TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
 654                 dev_conf &= ~(TUSB_DEV_CONF_ID_SEL | TUSB_DEV_CONF_SOFT_ID);
 655                 break;
 656
 657         default:
 658                 dev_dbg(musb->controller, "Trying to set mode %i\n", musb_mode);
 659                 return -EINVAL;
 660         }
 661
 662         musb_writel(tbase, TUSB_PHY_OTG_CTRL,
 663                         TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ctrl);
 664         musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE,
 665                         TUSB_PHY_OTG_CTRL_WRPROTECT | phy_otg_ena);
 666         musb_writel(tbase, TUSB_DEV_CONF, dev_conf);
 667
 668         otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 669         if ((musb_mode == MUSB_PERIPHERAL) &&
 670                 !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS))
 671                         INFO("Cannot be peripheral with mini-A cable "
 672                         "otg_stat: %08x\n", otg_stat);
 673
 674         return 0;
 675 }
 676
 677 static inline unsigned long
 678 tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
 679 {
 680         u32             otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 681         unsigned long   idle_timeout = 0;
 682         struct usb_otg  *otg = musb->xceiv->otg;
 683
 684         /* ID pin */
 685         if ((int_src & TUSB_INT_SRC_ID_STATUS_CHNG)) {
 686                 int     default_a;
 687
 688                 default_a = !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS);
 689                 dev_dbg(musb->controller, "Default-%c\n", default_a ? 'A' : 'B');
 690                 otg->default_a = default_a;
 691                 tusb_musb_set_vbus(musb, default_a);
 692
 693                 /* Don't allow idling immediately */
 694                 if (default_a)
 695                         idle_timeout = jiffies + (HZ * 3);
 696         }
 697
 698         /* VBUS state change */
 699         if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
 700
 701                 /* B-dev state machine:  no vbus ~= disconnect */
 702                 if (!otg->default_a) {
 703                         /* ? musb_root_disconnect(musb); */
 704                         musb->port1_status &=
 705                                 ~(USB_PORT_STAT_CONNECTION
 706                                 | USB_PORT_STAT_ENABLE
 707                                 | USB_PORT_STAT_LOW_SPEED
 708                                 | USB_PORT_STAT_HIGH_SPEED
 709                                 | USB_PORT_STAT_TEST
 710                                 );
 711
 712                         if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
 713                                 dev_dbg(musb->controller, "Forcing disconnect (no interrupt)\n");
 714                                 if (musb->xceiv->otg->state != OTG_STATE_B_IDLE) {
 715                                         /* INTR_DISCONNECT can hide... */
 716                                         musb->xceiv->otg->state = OTG_STATE_B_IDLE;
 717                                         musb->int_usb |= MUSB_INTR_DISCONNECT;
 718                                 }
 719                                 musb->is_active = 0;
 720                         }
 721                         dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
 722                                 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
 723                         idle_timeout = jiffies + (1 * HZ);
 724                         schedule_delayed_work(&musb->irq_work, 0);
 725
 726                 } else /* A-dev state machine */ {
 727                         dev_dbg(musb->controller, "vbus change, %s, otg %03x\n",
 728                                 usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
 729
 730                         switch (musb->xceiv->otg->state) {
 731                         case OTG_STATE_A_IDLE:
 732                                 dev_dbg(musb->controller, "Got SRP, turning on VBUS\n");
 733                                 musb_platform_set_vbus(musb, 1);
 734
 735                                 /* CONNECT can wake if a_wait_bcon is set */
 736                                 if (musb->a_wait_bcon != 0)
 737                                         musb->is_active = 0;
 738                                 else
 739                                         musb->is_active = 1;
 740
 741                                 /*
 742                                  * OPT FS A TD.4.6 needs few seconds for
 743                                  * A_WAIT_VRISE
 744                                  */
 745                                 idle_timeout = jiffies + (2 * HZ);
 746
 747                                 break;
 748                         case OTG_STATE_A_WAIT_VRISE:
 749                                 /* ignore; A-session-valid < VBUS_VALID/2,
 750                                  * we monitor this with the timer
 751                                  */
 752                                 break;
 753                         case OTG_STATE_A_WAIT_VFALL:
 754                                 /* REVISIT this irq triggers during short
 755                                  * spikes caused by enumeration ...
 756                                  */
 757                                 if (musb->vbuserr_retry) {
 758                                         musb->vbuserr_retry--;
 759                                         tusb_musb_set_vbus(musb, 1);
 760                                 } else {
 761                                         musb->vbuserr_retry
 762                                                 = VBUSERR_RETRY_COUNT;
 763                                         tusb_musb_set_vbus(musb, 0);
 764                                 }
 765                                 break;
 766                         default:
 767                                 break;
 768                         }
 769                 }
 770         }
 771
 772         /* OTG timer expiration */
 773         if (int_src & TUSB_INT_SRC_OTG_TIMEOUT) {
 774                 u8      devctl;
 775
 776                 dev_dbg(musb->controller, "%s timer, %03x\n",
 777                         usb_otg_state_string(musb->xceiv->otg->state), otg_stat);
 778
 779                 switch (musb->xceiv->otg->state) {
 780                 case OTG_STATE_A_WAIT_VRISE:
 781                         /* VBUS has probably been valid for a while now,
 782                          * but may well have bounced out of range a bit
 783                          */
 784                         devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 785                         if (otg_stat & TUSB_DEV_OTG_STAT_VBUS_VALID) {
 786                                 if ((devctl & MUSB_DEVCTL_VBUS)
 787                                                 != MUSB_DEVCTL_VBUS) {
 788                                         dev_dbg(musb->controller, "devctl %02x\n", devctl);
 789                                         break;
 790                                 }
 791                                 musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
 792                                 musb->is_active = 0;
 793                                 idle_timeout = jiffies
 794                                         + msecs_to_jiffies(musb->a_wait_bcon);
 795                         } else {
 796                                 /* REVISIT report overcurrent to hub? */
 797                                 ERR("vbus too slow, devctl %02x\n", devctl);
 798                                 tusb_musb_set_vbus(musb, 0);
 799                         }
 800                         break;
 801                 case OTG_STATE_A_WAIT_BCON:
 802                         if (musb->a_wait_bcon != 0)
 803                                 idle_timeout = jiffies
 804                                         + msecs_to_jiffies(musb->a_wait_bcon);
 805                         break;
 806                 case OTG_STATE_A_SUSPEND:
 807                         break;
 808                 case OTG_STATE_B_WAIT_ACON:
 809                         break;
 810                 default:
 811                         break;
 812                 }
 813         }
 814         schedule_delayed_work(&musb->irq_work, 0);
 815
 816         return idle_timeout;
 817 }
 818
 819 static irqreturn_t tusb_musb_interrupt(int irq, void *__hci)
 820 {
 821         struct musb     *musb = __hci;
 822         void __iomem    *tbase = musb->ctrl_base;
 823         unsigned long   flags, idle_timeout = 0;
 824         u32             int_mask, int_src;
 825
 826         spin_lock_irqsave(&musb->lock, flags);
 827
 828         /* Mask all interrupts to allow using both edge and level GPIO irq */
 829         int_mask = musb_readl(tbase, TUSB_INT_MASK);
 830         musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
 831
 832         int_src = musb_readl(tbase, TUSB_INT_SRC) & ~TUSB_INT_SRC_RESERVED_BITS;
 833         dev_dbg(musb->controller, "TUSB IRQ %08x\n", int_src);
 834
 835         musb->int_usb = (u8) int_src;
 836
 837         /* Acknowledge wake-up source interrupts */
 838         if (int_src & TUSB_INT_SRC_DEV_WAKEUP) {
 839                 u32     reg;
 840                 u32     i;
 841
 842                 if (musb->tusb_revision == TUSB_REV_30)
 843                         tusb_wbus_quirk(musb, 0);
 844
 845                 /* there are issues re-locking the PLL on wakeup ... */
 846
 847                 /* work around issue 8 */
 848                 for (i = 0xf7f7f7; i > 0xf7f7f7 - 1000; i--) {
 849                         musb_writel(tbase, TUSB_SCRATCH_PAD, 0);
 850                         musb_writel(tbase, TUSB_SCRATCH_PAD, i);
 851                         reg = musb_readl(tbase, TUSB_SCRATCH_PAD);
 852                         if (reg == i)
 853                                 break;
 854                         dev_dbg(musb->controller, "TUSB NOR not ready\n");
 855                 }
 856
 857                 /* work around issue 13 (2nd half) */
 858                 tusb_set_clock_source(musb, 1);
 859
 860                 reg = musb_readl(tbase, TUSB_PRCM_WAKEUP_SOURCE);
 861                 musb_writel(tbase, TUSB_PRCM_WAKEUP_CLEAR, reg);
 862                 if (reg & ~TUSB_PRCM_WNORCS) {
 863                         musb->is_active = 1;
 864                         schedule_delayed_work(&musb->irq_work, 0);
 865                 }
 866                 dev_dbg(musb->controller, "wake %sactive %02x\n",
 867                                 musb->is_active ? "" : "in", reg);
 868
 869                 /* REVISIT host side TUSB_PRCM_WHOSTDISCON, TUSB_PRCM_WBUS */
 870         }
 871
 872         if (int_src & TUSB_INT_SRC_USB_IP_CONN)
 873                 del_timer(&musb->dev_timer);
 874
 875         /* OTG state change reports (annoyingly) not issued by Mentor core */
 876         if (int_src & (TUSB_INT_SRC_VBUS_SENSE_CHNG
 877                                 | TUSB_INT_SRC_OTG_TIMEOUT
 878                                 | TUSB_INT_SRC_ID_STATUS_CHNG))
 879                 idle_timeout = tusb_otg_ints(musb, int_src, tbase);
 880
 881         /*
 882          * Just clear the DMA interrupt if it comes as the completion for both
 883          * TX and RX is handled by the DMA callback in tusb6010_omap
 884          */
 885         if ((int_src & TUSB_INT_SRC_TXRX_DMA_DONE)) {
 886                 u32     dma_src = musb_readl(tbase, TUSB_DMA_INT_SRC);
 887
 888                 dev_dbg(musb->controller, "DMA IRQ %08x\n", dma_src);
 889                 musb_writel(tbase, TUSB_DMA_INT_CLEAR, dma_src);
 890         }
 891
 892         /* EP interrupts. In OCP mode tusb6010 mirrors the MUSB interrupts */
 893         if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX)) {
 894                 u32     musb_src = musb_readl(tbase, TUSB_USBIP_INT_SRC);
 895
 896                 musb_writel(tbase, TUSB_USBIP_INT_CLEAR, musb_src);
 897                 musb->int_rx = (((musb_src >> 16) & 0xffff) << 1);
 898                 musb->int_tx = (musb_src & 0xffff);
 899         } else {
 900                 musb->int_rx = 0;
 901                 musb->int_tx = 0;
 902         }
 903
 904         if (int_src & (TUSB_INT_SRC_USB_IP_TX | TUSB_INT_SRC_USB_IP_RX | 0xff))
 905                 musb_interrupt(musb);
 906
 907         /* Acknowledge TUSB interrupts. Clear only non-reserved bits */
 908         musb_writel(tbase, TUSB_INT_SRC_CLEAR,
 909                 int_src & ~TUSB_INT_MASK_RESERVED_BITS);
 910
 911         tusb_musb_try_idle(musb, idle_timeout);
 912
 913         musb_writel(tbase, TUSB_INT_MASK, int_mask);
 914         spin_unlock_irqrestore(&musb->lock, flags);
 915
 916         return IRQ_HANDLED;
 917 }
 918
 919 static int dma_off;
 920
 921 /*
 922  * Enables TUSB6010. Caller must take care of locking.
 923  * REVISIT:
 924  * - Check what is unnecessary in MGC_HdrcStart()
 925  */
 926 static void tusb_musb_enable(struct musb *musb)
 927 {
 928         void __iomem    *tbase = musb->ctrl_base;
 929
 930         /* Setup TUSB6010 main interrupt mask. Enable all interrupts except SOF.
 931          * REVISIT: Enable and deal with TUSB_INT_SRC_USB_IP_SOF */
 932         musb_writel(tbase, TUSB_INT_MASK, TUSB_INT_SRC_USB_IP_SOF);
 933
 934         /* Setup TUSB interrupt, disable DMA and GPIO interrupts */
 935         musb_writel(tbase, TUSB_USBIP_INT_MASK, 0);
 936         musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
 937         musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
 938
 939         /* Clear all subsystem interrups */
 940         musb_writel(tbase, TUSB_USBIP_INT_CLEAR, 0x7fffffff);
 941         musb_writel(tbase, TUSB_DMA_INT_CLEAR, 0x7fffffff);
 942         musb_writel(tbase, TUSB_GPIO_INT_CLEAR, 0x1ff);
 943
 944         /* Acknowledge pending interrupt(s) */
 945         musb_writel(tbase, TUSB_INT_SRC_CLEAR, ~TUSB_INT_MASK_RESERVED_BITS);
 946
 947         /* Only 0 clock cycles for minimum interrupt de-assertion time and
 948          * interrupt polarity active low seems to work reliably here */
 949         musb_writel(tbase, TUSB_INT_CTRL_CONF,
 950                         TUSB_INT_CTRL_CONF_INT_RELCYC(0));
 951
 952         irq_set_irq_type(musb->nIrq, IRQ_TYPE_LEVEL_LOW);
 953
 954         /* maybe force into the Default-A OTG state machine */
 955         if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
 956                         & TUSB_DEV_OTG_STAT_ID_STATUS))
 957                 musb_writel(tbase, TUSB_INT_SRC_SET,
 958                                 TUSB_INT_SRC_ID_STATUS_CHNG);
 959
 960         if (is_dma_capable() && dma_off)
 961                 printk(KERN_WARNING "%s %s: dma not reactivated\n",
 962                                 __FILE__, __func__);
 963         else
 964                 dma_off = 1;
 965 }
 966
 967 /*
 968  * Disables TUSB6010. Caller must take care of locking.
 969  */
 970 static void tusb_musb_disable(struct musb *musb)
 971 {
 972         void __iomem    *tbase = musb->ctrl_base;
 973
 974         /* FIXME stop DMA, IRQs, timers, ... */
 975
 976         /* disable all IRQs */
 977         musb_writel(tbase, TUSB_INT_MASK, ~TUSB_INT_MASK_RESERVED_BITS);
 978         musb_writel(tbase, TUSB_USBIP_INT_MASK, 0x7fffffff);
 979         musb_writel(tbase, TUSB_DMA_INT_MASK, 0x7fffffff);
 980         musb_writel(tbase, TUSB_GPIO_INT_MASK, 0x1ff);
 981
 982         del_timer(&musb->dev_timer);
 983
 984         if (is_dma_capable() && !dma_off) {
 985                 printk(KERN_WARNING "%s %s: dma still active\n",
 986                                 __FILE__, __func__);
 987                 dma_off = 1;
 988         }
 989 }
 990
 991 /*
 992  * Sets up TUSB6010 CPU interface specific signals and registers
 993  * Note: Settings optimized for OMAP24xx
 994  */
 995 static void tusb_setup_cpu_interface(struct musb *musb)
 996 {
 997         void __iomem    *tbase = musb->ctrl_base;
 998
 999         /*
1000          * Disable GPIO[5:0] pullups (used as output DMA requests)
1001          * Don't disable GPIO[7:6] as they are needed for wake-up.
1002          */
1003         musb_writel(tbase, TUSB_PULLUP_1_CTRL, 0x0000003F);
1004
1005         /* Disable all pullups on NOR IF, DMAREQ0 and DMAREQ1 */
1006         musb_writel(tbase, TUSB_PULLUP_2_CTRL, 0x01FFFFFF);
1007
1008         /* Turn GPIO[5:0] to DMAREQ[5:0] signals */
1009         musb_writel(tbase, TUSB_GPIO_CONF, TUSB_GPIO_CONF_DMAREQ(0x3f));
1010
1011         /* Burst size 16x16 bits, all six DMA requests enabled, DMA request
1012          * de-assertion time 2 system clocks p 62 */
1013         musb_writel(tbase, TUSB_DMA_REQ_CONF,
1014                 TUSB_DMA_REQ_CONF_BURST_SIZE(2) |
1015                 TUSB_DMA_REQ_CONF_DMA_REQ_EN(0x3f) |
1016                 TUSB_DMA_REQ_CONF_DMA_REQ_ASSER(2));
1017
1018         /* Set 0 wait count for synchronous burst access */
1019         musb_writel(tbase, TUSB_WAIT_COUNT, 1);
1020 }
1021
1022 static int tusb_musb_start(struct musb *musb)
1023 {
1024         void __iomem    *tbase = musb->ctrl_base;
1025         int             ret = 0;
1026         unsigned long   flags;
1027         u32             reg;
1028
1029         if (musb->board_set_power)
1030                 ret = musb->board_set_power(1);
1031         if (ret != 0) {
1032                 printk(KERN_ERR "tusb: Cannot enable TUSB6010\n");
1033                 return ret;
1034         }
1035
1036         spin_lock_irqsave(&musb->lock, flags);
1037
1038         if (musb_readl(tbase, TUSB_PROD_TEST_RESET) !=
1039                 TUSB_PROD_TEST_RESET_VAL) {
1040                 printk(KERN_ERR "tusb: Unable to detect TUSB6010\n");
1041                 goto err;
1042         }
1043
1044         musb->tusb_revision = tusb_get_revision(musb);
1045         tusb_print_revision(musb);
1046         if (musb->tusb_revision < 2) {
1047                 printk(KERN_ERR "tusb: Unsupported TUSB6010 revision %i\n",
1048                                 musb->tusb_revision);
1049                 goto err;
1050         }
1051
1052         /* The uint bit for "USB non-PDR interrupt enable" has to be 1 when
1053          * NOR FLASH interface is used */
1054         musb_writel(tbase, TUSB_VLYNQ_CTRL, 8);
1055
1056         /* Select PHY free running 60MHz as a system clock */
1057         tusb_set_clock_source(musb, 1);
1058
1059         /* VBus valid timer 1us, disable DFT/Debug and VLYNQ clocks for
1060          * power saving, enable VBus detect and session end comparators,
1061          * enable IDpullup, enable VBus charging */
1062         musb_writel(tbase, TUSB_PRCM_MNGMT,
1063                 TUSB_PRCM_MNGMT_VBUS_VALID_TIMER(0xa) |
1064                 TUSB_PRCM_MNGMT_VBUS_VALID_FLT_EN |
1065                 TUSB_PRCM_MNGMT_OTG_SESS_END_EN |
1066                 TUSB_PRCM_MNGMT_OTG_VBUS_DET_EN |
1067                 TUSB_PRCM_MNGMT_OTG_ID_PULLUP);
1068         tusb_setup_cpu_interface(musb);
1069
1070         /* simplify:  always sense/pullup ID pins, as if in OTG mode */
1071         reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL_ENABLE);
1072         reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1073         musb_writel(tbase, TUSB_PHY_OTG_CTRL_ENABLE, reg);
1074
1075         reg = musb_readl(tbase, TUSB_PHY_OTG_CTRL);
1076         reg |= TUSB_PHY_OTG_CTRL_WRPROTECT | TUSB_PHY_OTG_CTRL_OTG_ID_PULLUP;
1077         musb_writel(tbase, TUSB_PHY_OTG_CTRL, reg);
1078
1079         spin_unlock_irqrestore(&musb->lock, flags);
1080
1081         return 0;
1082
1083 err:
1084         spin_unlock_irqrestore(&musb->lock, flags);
1085
1086         if (musb->board_set_power)
1087                 musb->board_set_power(0);
1088
1089         return -ENODEV;
1090 }
1091
1092 static int tusb_musb_init(struct musb *musb)
1093 {
1094         struct platform_device  *pdev;
1095         struct resource         *mem;
1096         void __iomem            *sync = NULL;
1097         int                     ret;
1098
1099         musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
1100         if (IS_ERR_OR_NULL(musb->xceiv))
1101                 return -EPROBE_DEFER;
1102
1103         pdev = to_platform_device(musb->controller);
1104
1105         /* dma address for async dma */
1106         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1107         if (!mem) {
1108                 pr_debug("no async dma resource?\n");
1109                 ret = -ENODEV;
1110                 goto done;
1111         }
1112         musb->async = mem->start;
1113
1114         /* dma address for sync dma */
1115         mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1116         if (!mem) {
1117                 pr_debug("no sync dma resource?\n");
1118                 ret = -ENODEV;
1119                 goto done;
1120         }
1121         musb->sync = mem->start;
1122
1123         sync = ioremap(mem->start, resource_size(mem));
1124         if (!sync) {
1125                 pr_debug("ioremap for sync failed\n");
1126                 ret = -ENOMEM;
1127                 goto done;
1128         }
1129         musb->sync_va = sync;
1130
1131         /* Offsets from base: VLYNQ at 0x000, MUSB regs at 0x400,
1132          * FIFOs at 0x600, TUSB at 0x800
1133          */
1134         musb->mregs += TUSB_BASE_OFFSET;
1135
1136         ret = tusb_musb_start(musb);
1137         if (ret) {
1138                 printk(KERN_ERR "Could not start tusb6010 (%d)\n",
1139                                 ret);
1140                 goto done;
1141         }
1142         musb->isr = tusb_musb_interrupt;
1143
1144         musb->xceiv->set_power = tusb_draw_power;
1145         the_musb = musb;
1146
1147         timer_setup(&musb->dev_timer, musb_do_idle, 0);
1148
1149 done:
1150         if (ret < 0) {
1151                 if (sync)
1152                         iounmap(sync);
1153
1154                 usb_put_phy(musb->xceiv);
1155         }
1156         return ret;
1157 }
1158
1159 static int tusb_musb_exit(struct musb *musb)
1160 {
1161         del_timer_sync(&musb->dev_timer);
1162         the_musb = NULL;
1163
1164         if (musb->board_set_power)
1165                 musb->board_set_power(0);
1166
1167         iounmap(musb->sync_va);
1168
1169         usb_put_phy(musb->xceiv);
1170         return 0;
1171 }
1172
1173 static const struct musb_platform_ops tusb_ops = {
1174         .quirks         = MUSB_DMA_TUSB_OMAP | MUSB_IN_TUSB |
1175                           MUSB_G_NO_SKB_RESERVE,
1176         .init           = tusb_musb_init,
1177         .exit           = tusb_musb_exit,
1178
1179         .ep_offset      = tusb_ep_offset,
1180         .ep_select      = tusb_ep_select,
1181         .fifo_offset    = tusb_fifo_offset,
1182         .readb          = tusb_readb,
1183         .writeb         = tusb_writeb,
1184         .read_fifo      = tusb_read_fifo,
1185         .write_fifo     = tusb_write_fifo,
1186 #ifdef CONFIG_USB_TUSB_OMAP_DMA
1187         .dma_init       = tusb_dma_controller_create,
1188         .dma_exit       = tusb_dma_controller_destroy,
1189 #endif
1190         .enable         = tusb_musb_enable,
1191         .disable        = tusb_musb_disable,
1192
1193         .set_mode       = tusb_musb_set_mode,
1194         .try_idle       = tusb_musb_try_idle,
1195
1196         .vbus_status    = tusb_musb_vbus_status,
1197         .set_vbus       = tusb_musb_set_vbus,
1198 };
1199
1200 static const struct platform_device_info tusb_dev_info = {
1201         .name           = "musb-hdrc",
1202         .id             = PLATFORM_DEVID_AUTO,
1203         .dma_mask       = DMA_BIT_MASK(32),
1204 };
1205
1206 static int tusb_probe(struct platform_device *pdev)
1207 {
1208         struct resource musb_resources[3];
1209         struct musb_hdrc_platform_data  *pdata = dev_get_platdata(&pdev->dev);
1210         struct platform_device          *musb;
1211         struct tusb6010_glue            *glue;
1212         struct platform_device_info     pinfo;
1213         int                             ret;
1214
1215         glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
1216         if (!glue)
1217                 return -ENOMEM;
1218
1219         glue->dev                       = &pdev->dev;
1220
1221         pdata->platform_ops             = &tusb_ops;
1222
1223         usb_phy_generic_register();
1224         platform_set_drvdata(pdev, glue);
1225
1226         memset(musb_resources, 0x00, sizeof(*musb_resources) *
1227                         ARRAY_SIZE(musb_resources));
1228
1229         musb_resources[0].name = pdev->resource[0].name;
1230         musb_resources[0].start = pdev->resource[0].start;
1231         musb_resources[0].end = pdev->resource[0].end;
1232         musb_resources[0].flags = pdev->resource[0].flags;
1233
1234         musb_resources[1].name = pdev->resource[1].name;
1235         musb_resources[1].start = pdev->resource[1].start;
1236         musb_resources[1].end = pdev->resource[1].end;
1237         musb_resources[1].flags = pdev->resource[1].flags;
1238
1239         musb_resources[2].name = pdev->resource[2].name;
1240         musb_resources[2].start = pdev->resource[2].start;
1241         musb_resources[2].end = pdev->resource[2].end;
1242         musb_resources[2].flags = pdev->resource[2].flags;
1243
1244         pinfo = tusb_dev_info;
1245         pinfo.parent = &pdev->dev;
1246         pinfo.res = musb_resources;
1247         pinfo.num_res = ARRAY_SIZE(musb_resources);
1248         pinfo.data = pdata;
1249         pinfo.size_data = sizeof(*pdata);
1250
1251         glue->musb = musb = platform_device_register_full(&pinfo);
1252         if (IS_ERR(musb)) {
1253                 ret = PTR_ERR(musb);
1254                 dev_err(&pdev->dev, "failed to register musb device: %d\n", ret);
1255                 return ret;
1256         }
1257
1258         return 0;
1259 }
1260
1261 static int tusb_remove(struct platform_device *pdev)
1262 {
1263         struct tusb6010_glue            *glue = platform_get_drvdata(pdev);
1264
1265         platform_device_unregister(glue->musb);
1266         usb_phy_generic_unregister(glue->phy);
1267
1268         return 0;
1269 }
1270
1271 static struct platform_driver tusb_driver = {
1272         .probe          = tusb_probe,
1273         .remove         = tusb_remove,
1274         .driver         = {
1275                 .name   = "musb-tusb",
1276         },
1277 };
1278
1279 MODULE_DESCRIPTION("TUSB6010 MUSB Glue Layer");
1280 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1281 MODULE_LICENSE("GPL v2");
1282 module_platform_driver(tusb_driver);