drivers/usb/musb/tusb6010.c

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

DEFINITIONS
