drivers/usb/musb-new/musb_core.h

   1 /*
   2  * MUSB OTG driver defines
   3  *
   4  * Copyright 2005 Mentor Graphics Corporation
   5  * Copyright (C) 2005-2006 by Texas Instruments
   6  * Copyright (C) 2006-2007 Nokia Corporation
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0
   9  */
  10
  11 #ifndef __MUSB_CORE_H__
  12 #define __MUSB_CORE_H__
  13
  14 #ifndef __UBOOT__
  15 #include <linux/slab.h>
  16 #include <linux/list.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/errno.h>
  19 #include <linux/timer.h>
  20 #include <linux/device.h>
  21 #include <linux/usb.h>
  22 #include <linux/usb/otg.h>
  23 #else
  24 #include <asm/errno.h>
  25 #endif
  26 #include <linux/usb/ch9.h>
  27 #include <linux/usb/gadget.h>
  28 #include <linux/usb/musb.h>
  29
  30 struct musb;
  31 struct musb_hw_ep;
  32 struct musb_ep;
  33
  34 /* Helper defines for struct musb->hwvers */
  35 #define MUSB_HWVERS_MAJOR(x)    ((x >> 10) & 0x1f)
  36 #define MUSB_HWVERS_MINOR(x)    (x & 0x3ff)
  37 #define MUSB_HWVERS_RC          0x8000
  38 #define MUSB_HWVERS_1300        0x52C
  39 #define MUSB_HWVERS_1400        0x590
  40 #define MUSB_HWVERS_1800        0x720
  41 #define MUSB_HWVERS_1900        0x784
  42 #define MUSB_HWVERS_2000        0x800
  43
  44 #include "musb_debug.h"
  45 #include "musb_dma.h"
  46
  47 #include "musb_io.h"
  48 #include "musb_regs.h"
  49
  50 #include "musb_gadget.h"
  51 #ifndef __UBOOT__
  52 #include <linux/usb/hcd.h>
  53 #endif
  54 #include "musb_host.h"
  55
  56 #define is_peripheral_enabled(musb)     ((musb)->board_mode != MUSB_HOST)
  57 #define is_host_enabled(musb)           ((musb)->board_mode != MUSB_PERIPHERAL)
  58 #define is_otg_enabled(musb)            ((musb)->board_mode == MUSB_OTG)
  59
  60 /* NOTE:  otg and peripheral-only state machines start at B_IDLE.
  61  * OTG or host-only go to A_IDLE when ID is sensed.
  62  */
  63 #define is_peripheral_active(m)         (!(m)->is_host)
  64 #define is_host_active(m)               ((m)->is_host)
  65
  66 #ifdef CONFIG_PROC_FS
  67 #include <linux/fs.h>
  68 #define MUSB_CONFIG_PROC_FS
  69 #endif
  70
  71 /****************************** PERIPHERAL ROLE *****************************/
  72
  73 #ifndef __UBOOT__
  74 #define is_peripheral_capable() (1)
  75 #else
  76 #ifdef CONFIG_USB_MUSB_GADGET
  77 #define is_peripheral_capable() (1)
  78 #else
  79 #define is_peripheral_capable() (0)
  80 #endif
  81 #endif
  82
  83 extern irqreturn_t musb_g_ep0_irq(struct musb *);
  84 extern void musb_g_tx(struct musb *, u8);
  85 extern void musb_g_rx(struct musb *, u8);
  86 extern void musb_g_reset(struct musb *);
  87 extern void musb_g_suspend(struct musb *);
  88 extern void musb_g_resume(struct musb *);
  89 extern void musb_g_wakeup(struct musb *);
  90 extern void musb_g_disconnect(struct musb *);
  91
  92 /****************************** HOST ROLE ***********************************/
  93
  94 #ifndef __UBOOT__
  95 #define is_host_capable()       (1)
  96 #else
  97 #ifdef CONFIG_USB_MUSB_HOST
  98 #define is_host_capable()       (1)
  99 #else
 100 #define is_host_capable()       (0)
 101 #endif
 102 #endif
 103
 104 extern irqreturn_t musb_h_ep0_irq(struct musb *);
 105 extern void musb_host_tx(struct musb *, u8);
 106 extern void musb_host_rx(struct musb *, u8);
 107
 108 /****************************** CONSTANTS ********************************/
 109
 110 #ifndef MUSB_C_NUM_EPS
 111 #define MUSB_C_NUM_EPS ((u8)16)
 112 #endif
 113
 114 #ifndef MUSB_MAX_END0_PACKET
 115 #define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
 116 #endif
 117
 118 /* host side ep0 states */
 119 enum musb_h_ep0_state {
 120         MUSB_EP0_IDLE,
 121         MUSB_EP0_START,                 /* expect ack of setup */
 122         MUSB_EP0_IN,                    /* expect IN DATA */
 123         MUSB_EP0_OUT,                   /* expect ack of OUT DATA */
 124         MUSB_EP0_STATUS,                /* expect ack of STATUS */
 125 } __attribute__ ((packed));
 126
 127 /* peripheral side ep0 states */
 128 enum musb_g_ep0_state {
 129         MUSB_EP0_STAGE_IDLE,            /* idle, waiting for SETUP */
 130         MUSB_EP0_STAGE_SETUP,           /* received SETUP */
 131         MUSB_EP0_STAGE_TX,              /* IN data */
 132         MUSB_EP0_STAGE_RX,              /* OUT data */
 133         MUSB_EP0_STAGE_STATUSIN,        /* (after OUT data) */
 134         MUSB_EP0_STAGE_STATUSOUT,       /* (after IN data) */
 135         MUSB_EP0_STAGE_ACKWAIT,         /* after zlp, before statusin */
 136 } __attribute__ ((packed));
 137
 138 /*
 139  * OTG protocol constants.  See USB OTG 1.3 spec,
 140  * sections 5.5 "Device Timings" and 6.6.5 "Timers".
 141  */
 142 #define OTG_TIME_A_WAIT_VRISE   100             /* msec (max) */
 143 #define OTG_TIME_A_WAIT_BCON    1100            /* min 1 second */
 144 #define OTG_TIME_A_AIDL_BDIS    200             /* min 200 msec */
 145 #define OTG_TIME_B_ASE0_BRST    100             /* min 3.125 ms */
 146
 147
 148 /*************************** REGISTER ACCESS ********************************/
 149
 150 /* Endpoint registers (other than dynfifo setup) can be accessed either
 151  * directly with the "flat" model, or after setting up an index register.
 152  */
 153
 154 #if defined(CONFIG_ARCH_DAVINCI) || defined(CONFIG_SOC_OMAP2430) \
 155                 || defined(CONFIG_SOC_OMAP3430) || defined(CONFIG_BLACKFIN) \
 156                 || defined(CONFIG_ARCH_OMAP4)
 157 /* REVISIT indexed access seemed to
 158  * misbehave (on DaVinci) for at least peripheral IN ...
 159  */
 160 #define MUSB_FLAT_REG
 161 #endif
 162
 163 /* TUSB mapping: "flat" plus ep0 special cases */
 164 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
 165         defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
 166 #define musb_ep_select(_mbase, _epnum) \
 167         musb_writeb((_mbase), MUSB_INDEX, (_epnum))
 168 #define MUSB_EP_OFFSET                  MUSB_TUSB_OFFSET
 169
 170 /* "flat" mapping: each endpoint has its own i/o address */
 171 #elif   defined(MUSB_FLAT_REG)
 172 #define musb_ep_select(_mbase, _epnum)  (((void)(_mbase)), ((void)(_epnum)))
 173 #define MUSB_EP_OFFSET                  MUSB_FLAT_OFFSET
 174
 175 /* "indexed" mapping: INDEX register controls register bank select */
 176 #else
 177 #define musb_ep_select(_mbase, _epnum) \
 178         musb_writeb((_mbase), MUSB_INDEX, (_epnum))
 179 #define MUSB_EP_OFFSET                  MUSB_INDEXED_OFFSET
 180 #endif
 181
 182 /****************************** FUNCTIONS ********************************/
 183
 184 #define MUSB_HST_MODE(_musb)\
 185         { (_musb)->is_host = true; }
 186 #define MUSB_DEV_MODE(_musb) \
 187         { (_musb)->is_host = false; }
 188
 189 #define test_devctl_hst_mode(_x) \
 190         (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
 191
 192 #define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
 193
 194 /******************************** TYPES *************************************/
 195
 196 /**
 197  * struct musb_platform_ops - Operations passed to musb_core by HW glue layer
 198  * @init:       turns on clocks, sets up platform-specific registers, etc
 199  * @exit:       undoes @init
 200  * @set_mode:   forcefully changes operating mode
 201  * @try_ilde:   tries to idle the IP
 202  * @vbus_status: returns vbus status if possible
 203  * @set_vbus:   forces vbus status
 204  * @adjust_channel_params: pre check for standard dma channel_program func
 205  */
 206 struct musb_platform_ops {
 207         int     (*init)(struct musb *musb);
 208         int     (*exit)(struct musb *musb);
 209
 210 #ifndef __UBOOT__
 211         void    (*enable)(struct musb *musb);
 212 #else
 213         int     (*enable)(struct musb *musb);
 214 #endif
 215         void    (*disable)(struct musb *musb);
 216
 217         int     (*set_mode)(struct musb *musb, u8 mode);
 218         void    (*try_idle)(struct musb *musb, unsigned long timeout);
 219
 220         int     (*vbus_status)(struct musb *musb);
 221         void    (*set_vbus)(struct musb *musb, int on);
 222
 223         int     (*adjust_channel_params)(struct dma_channel *channel,
 224                                 u16 packet_sz, u8 *mode,
 225                                 dma_addr_t *dma_addr, u32 *len);
 226 };
 227
 228 /*
 229  * struct musb_hw_ep - endpoint hardware (bidirectional)
 230  *
 231  * Ordered slightly for better cacheline locality.
 232  */
 233 struct musb_hw_ep {
 234         struct musb             *musb;
 235         void __iomem            *fifo;
 236         void __iomem            *regs;
 237
 238 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
 239         defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
 240         void __iomem            *conf;
 241 #endif
 242
 243         /* index in musb->endpoints[]  */
 244         u8                      epnum;
 245
 246         /* hardware configuration, possibly dynamic */
 247         bool                    is_shared_fifo;
 248         bool                    tx_double_buffered;
 249         bool                    rx_double_buffered;
 250         u16                     max_packet_sz_tx;
 251         u16                     max_packet_sz_rx;
 252
 253         struct dma_channel      *tx_channel;
 254         struct dma_channel      *rx_channel;
 255
 256 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
 257         defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
 258         /* TUSB has "asynchronous" and "synchronous" dma modes */
 259         dma_addr_t              fifo_async;
 260         dma_addr_t              fifo_sync;
 261         void __iomem            *fifo_sync_va;
 262 #endif
 263
 264         void __iomem            *target_regs;
 265
 266         /* currently scheduled peripheral endpoint */
 267         struct musb_qh          *in_qh;
 268         struct musb_qh          *out_qh;
 269
 270         u8                      rx_reinit;
 271         u8                      tx_reinit;
 272
 273         /* peripheral side */
 274         struct musb_ep          ep_in;                  /* TX */
 275         struct musb_ep          ep_out;                 /* RX */
 276 };
 277
 278 static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
 279 {
 280         return next_request(&hw_ep->ep_in);
 281 }
 282
 283 static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
 284 {
 285         return next_request(&hw_ep->ep_out);
 286 }
 287
 288 struct musb_csr_regs {
 289         /* FIFO registers */
 290         u16 txmaxp, txcsr, rxmaxp, rxcsr;
 291         u16 rxfifoadd, txfifoadd;
 292         u8 txtype, txinterval, rxtype, rxinterval;
 293         u8 rxfifosz, txfifosz;
 294         u8 txfunaddr, txhubaddr, txhubport;
 295         u8 rxfunaddr, rxhubaddr, rxhubport;
 296 };
 297
 298 struct musb_context_registers {
 299
 300         u8 power;
 301         u16 intrtxe, intrrxe;
 302         u8 intrusbe;
 303         u16 frame;
 304         u8 index, testmode;
 305
 306         u8 devctl, busctl, misc;
 307         u32 otg_interfsel;
 308
 309         struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
 310 };
 311
 312 /*
 313  * struct musb - Driver instance data.
 314  */
 315 struct musb {
 316         /* device lock */
 317         spinlock_t              lock;
 318
 319         const struct musb_platform_ops *ops;
 320         struct musb_context_registers context;
 321
 322         irqreturn_t             (*isr)(int, void *);
 323         struct work_struct      irq_work;
 324         u16                     hwvers;
 325
 326 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
 327 #define MUSB_PORT_STAT_RESUME   (1 << 31)
 328
 329         u32                     port1_status;
 330
 331         unsigned long           rh_timer;
 332
 333         enum musb_h_ep0_state   ep0_stage;
 334
 335         /* bulk traffic normally dedicates endpoint hardware, and each
 336          * direction has its own ring of host side endpoints.
 337          * we try to progress the transfer at the head of each endpoint's
 338          * queue until it completes or NAKs too much; then we try the next
 339          * endpoint.
 340          */
 341         struct musb_hw_ep       *bulk_ep;
 342
 343         struct list_head        control;        /* of musb_qh */
 344         struct list_head        in_bulk;        /* of musb_qh */
 345         struct list_head        out_bulk;       /* of musb_qh */
 346
 347         struct timer_list       otg_timer;
 348         struct notifier_block   nb;
 349
 350         struct dma_controller   *dma_controller;
 351
 352         struct device           *controller;
 353         void __iomem            *ctrl_base;
 354         void __iomem            *mregs;
 355
 356 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
 357         defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
 358         dma_addr_t              async;
 359         dma_addr_t              sync;
 360         void __iomem            *sync_va;
 361 #endif
 362
 363         /* passed down from chip/board specific irq handlers */
 364         u8                      int_usb;
 365         u16                     int_rx;
 366         u16                     int_tx;
 367
 368         struct usb_phy          *xceiv;
 369
 370         int nIrq;
 371         unsigned                irq_wake:1;
 372
 373         struct musb_hw_ep        endpoints[MUSB_C_NUM_EPS];
 374 #define control_ep              endpoints
 375
 376 #define VBUSERR_RETRY_COUNT     3
 377         u16                     vbuserr_retry;
 378         u16 epmask;
 379         u8 nr_endpoints;
 380
 381         u8 board_mode;          /* enum musb_mode */
 382         int                     (*board_set_power)(int state);
 383
 384         u8                      min_power;      /* vbus for periph, in mA/2 */
 385
 386         bool                    is_host;
 387
 388         int                     a_wait_bcon;    /* VBUS timeout in msecs */
 389         unsigned long           idle_timeout;   /* Next timeout in jiffies */
 390
 391         /* active means connected and not suspended */
 392         unsigned                is_active:1;
 393
 394         unsigned is_multipoint:1;
 395         unsigned ignore_disconnect:1;   /* during bus resets */
 396
 397         unsigned                hb_iso_rx:1;    /* high bandwidth iso rx? */
 398         unsigned                hb_iso_tx:1;    /* high bandwidth iso tx? */
 399         unsigned                dyn_fifo:1;     /* dynamic FIFO supported? */
 400
 401         unsigned                bulk_split:1;
 402 #define can_bulk_split(musb,type) \
 403         (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
 404
 405         unsigned                bulk_combine:1;
 406 #define can_bulk_combine(musb,type) \
 407         (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
 408
 409         /* is_suspended means USB B_PERIPHERAL suspend */
 410         unsigned                is_suspended:1;
 411
 412         /* may_wakeup means remote wakeup is enabled */
 413         unsigned                may_wakeup:1;
 414
 415         /* is_self_powered is reported in device status and the
 416          * config descriptor.  is_bus_powered means B_PERIPHERAL
 417          * draws some VBUS current; both can be true.
 418          */
 419         unsigned                is_self_powered:1;
 420         unsigned                is_bus_powered:1;
 421
 422         unsigned                set_address:1;
 423         unsigned                test_mode:1;
 424         unsigned                softconnect:1;
 425
 426         u8                      address;
 427         u8                      test_mode_nr;
 428         u16                     ackpend;                /* ep0 */
 429         enum musb_g_ep0_state   ep0_state;
 430         struct usb_gadget       g;                      /* the gadget */
 431         struct usb_gadget_driver *gadget_driver;        /* its driver */
 432
 433         /*
 434          * FIXME: Remove this flag.
 435          *
 436          * This is only added to allow Blackfin to work
 437          * with current driver. For some unknown reason
 438          * Blackfin doesn't work with double buffering
 439          * and that's enabled by default.
 440          *
 441          * We added this flag to forcefully disable double
 442          * buffering until we get it working.
 443          */
 444         unsigned                double_buffer_not_ok:1;
 445
 446         struct musb_hdrc_config *config;
 447
 448 #ifdef MUSB_CONFIG_PROC_FS
 449         struct proc_dir_entry *proc_entry;
 450 #endif
 451 };
 452
 453 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
 454 {
 455         return container_of(g, struct musb, g);
 456 }
 457
 458 #ifdef CONFIG_BLACKFIN
 459 static inline int musb_read_fifosize(struct musb *musb,
 460                 struct musb_hw_ep *hw_ep, u8 epnum)
 461 {
 462         musb->nr_endpoints++;
 463         musb->epmask |= (1 << epnum);
 464
 465         if (epnum < 5) {
 466                 hw_ep->max_packet_sz_tx = 128;
 467                 hw_ep->max_packet_sz_rx = 128;
 468         } else {
 469                 hw_ep->max_packet_sz_tx = 1024;
 470                 hw_ep->max_packet_sz_rx = 1024;
 471         }
 472         hw_ep->is_shared_fifo = false;
 473
 474         return 0;
 475 }
 476
 477 static inline void musb_configure_ep0(struct musb *musb)
 478 {
 479         musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 480         musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
 481         musb->endpoints[0].is_shared_fifo = true;
 482 }
 483
 484 #else
 485
 486 static inline int musb_read_fifosize(struct musb *musb,
 487                 struct musb_hw_ep *hw_ep, u8 epnum)
 488 {
 489         void *mbase = musb->mregs;
 490         u8 reg = 0;
 491
 492         /* read from core using indexed model */
 493         reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE));
 494         /* 0's returned when no more endpoints */
 495         if (!reg)
 496                 return -ENODEV;
 497
 498         musb->nr_endpoints++;
 499         musb->epmask |= (1 << epnum);
 500
 501         hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
 502
 503         /* shared TX/RX FIFO? */
 504         if ((reg & 0xf0) == 0xf0) {
 505                 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
 506                 hw_ep->is_shared_fifo = true;
 507                 return 0;
 508         } else {
 509                 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
 510                 hw_ep->is_shared_fifo = false;
 511         }
 512
 513         return 0;
 514 }
 515
 516 static inline void musb_configure_ep0(struct musb *musb)
 517 {
 518         musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 519         musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
 520         musb->endpoints[0].is_shared_fifo = true;
 521 }
 522 #endif /* CONFIG_BLACKFIN */
 523
 524
 525 /***************************** Glue it together *****************************/
 526
 527 extern const char musb_driver_name[];
 528
 529 #ifndef __UBOOT__
 530 extern void musb_start(struct musb *musb);
 531 #else
 532 extern int musb_start(struct musb *musb);
 533 #endif
 534 extern void musb_stop(struct musb *musb);
 535
 536 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
 537 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
 538
 539 extern void musb_load_testpacket(struct musb *);
 540
 541 extern irqreturn_t musb_interrupt(struct musb *);
 542
 543 extern void musb_hnp_stop(struct musb *musb);
 544
 545 static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
 546 {
 547         if (musb->ops->set_vbus)
 548                 musb->ops->set_vbus(musb, is_on);
 549 }
 550
 551 #ifndef __UBOOT__
 552 static inline void musb_platform_enable(struct musb *musb)
 553 {
 554         if (musb->ops->enable)
 555                 musb->ops->enable(musb);
 556 }
 557 #else
 558 static inline int musb_platform_enable(struct musb *musb)
 559 {
 560         if (!musb->ops->enable)
 561                 return 0;
 562
 563         return musb->ops->enable(musb);
 564 }
 565 #endif
 566
 567 static inline void musb_platform_disable(struct musb *musb)
 568 {
 569         if (musb->ops->disable)
 570                 musb->ops->disable(musb);
 571 }
 572
 573 static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
 574 {
 575         if (!musb->ops->set_mode)
 576                 return 0;
 577
 578         return musb->ops->set_mode(musb, mode);
 579 }
 580
 581 static inline void musb_platform_try_idle(struct musb *musb,
 582                 unsigned long timeout)
 583 {
 584         if (musb->ops->try_idle)
 585                 musb->ops->try_idle(musb, timeout);
 586 }
 587
 588 static inline int musb_platform_get_vbus_status(struct musb *musb)
 589 {
 590         if (!musb->ops->vbus_status)
 591                 return 0;
 592
 593         return musb->ops->vbus_status(musb);
 594 }
 595
 596 static inline int musb_platform_init(struct musb *musb)
 597 {
 598         if (!musb->ops->init)
 599                 return -EINVAL;
 600
 601         return musb->ops->init(musb);
 602 }
 603
 604 static inline int musb_platform_exit(struct musb *musb)
 605 {
 606         if (!musb->ops->exit)
 607                 return -EINVAL;
 608
 609         return musb->ops->exit(musb);
 610 }
 611
 612 #ifdef __UBOOT__
 613 struct musb *
 614 musb_init_controller(struct musb_hdrc_platform_data *plat, struct device *dev,
 615                              void *ctrl);
 616 #endif
 617 #endif  /* __MUSB_CORE_H__ */