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 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * version 2 as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 20 * 02110-1301 USA 21 * 22 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 25 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #ifndef __MUSB_CORE_H__ 36 #define __MUSB_CORE_H__ 37 38 #include <linux/slab.h> 39 #include <linux/list.h> 40 #include <linux/interrupt.h> 41 #include <linux/errno.h> 42 #include <linux/timer.h> 43 #include <linux/device.h> 44 #include <linux/usb/ch9.h> 45 #include <linux/usb/gadget.h> 46 #include <linux/usb.h> 47 #include <linux/usb/otg.h> 48 #include <linux/usb/musb.h> 49 50 struct musb; 51 struct musb_hw_ep; 52 struct musb_ep; 53 54 /* Helper defines for struct musb->hwvers */ 55 #define MUSB_HWVERS_MAJOR(x) ((x >> 10) & 0x1f) 56 #define MUSB_HWVERS_MINOR(x) (x & 0x3ff) 57 #define MUSB_HWVERS_RC 0x8000 58 #define MUSB_HWVERS_1300 0x52C 59 #define MUSB_HWVERS_1400 0x590 60 #define MUSB_HWVERS_1800 0x720 61 #define MUSB_HWVERS_1900 0x784 62 #define MUSB_HWVERS_2000 0x800 63 64 #include "musb_debug.h" 65 #include "musb_dma.h" 66 67 #include "musb_io.h" 68 #include "musb_regs.h" 69 70 #include "musb_gadget.h" 71 #include <linux/usb/hcd.h> 72 #include "musb_host.h" 73 74 /* NOTE: otg and peripheral-only state machines start at B_IDLE. 75 * OTG or host-only go to A_IDLE when ID is sensed. 76 */ 77 #define is_peripheral_active(m) (!(m)->is_host) 78 #define is_host_active(m) ((m)->is_host) 79 80 #ifdef CONFIG_PROC_FS 81 #include <linux/fs.h> 82 #define MUSB_CONFIG_PROC_FS 83 #endif 84 85 /****************************** PERIPHERAL ROLE *****************************/ 86 87 extern irqreturn_t musb_g_ep0_irq(struct musb *); 88 extern void musb_g_tx(struct musb *, u8); 89 extern void musb_g_rx(struct musb *, u8); 90 extern void musb_g_reset(struct musb *); 91 extern void musb_g_suspend(struct musb *); 92 extern void musb_g_resume(struct musb *); 93 extern void musb_g_wakeup(struct musb *); 94 extern void musb_g_disconnect(struct musb *); 95 96 /****************************** HOST ROLE ***********************************/ 97 98 extern irqreturn_t musb_h_ep0_irq(struct musb *); 99 extern void musb_host_tx(struct musb *, u8); 100 extern void musb_host_rx(struct musb *, u8); 101 102 /****************************** CONSTANTS ********************************/ 103 104 #ifndef MUSB_C_NUM_EPS 105 #define MUSB_C_NUM_EPS ((u8)16) 106 #endif 107 108 #ifndef MUSB_MAX_END0_PACKET 109 #define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE) 110 #endif 111 112 /* host side ep0 states */ 113 enum musb_h_ep0_state { 114 MUSB_EP0_IDLE, 115 MUSB_EP0_START, /* expect ack of setup */ 116 MUSB_EP0_IN, /* expect IN DATA */ 117 MUSB_EP0_OUT, /* expect ack of OUT DATA */ 118 MUSB_EP0_STATUS, /* expect ack of STATUS */ 119 } __attribute__ ((packed)); 120 121 /* peripheral side ep0 states */ 122 enum musb_g_ep0_state { 123 MUSB_EP0_STAGE_IDLE, /* idle, waiting for SETUP */ 124 MUSB_EP0_STAGE_SETUP, /* received SETUP */ 125 MUSB_EP0_STAGE_TX, /* IN data */ 126 MUSB_EP0_STAGE_RX, /* OUT data */ 127 MUSB_EP0_STAGE_STATUSIN, /* (after OUT data) */ 128 MUSB_EP0_STAGE_STATUSOUT, /* (after IN data) */ 129 MUSB_EP0_STAGE_ACKWAIT, /* after zlp, before statusin */ 130 } __attribute__ ((packed)); 131 132 /* 133 * OTG protocol constants. See USB OTG 1.3 spec, 134 * sections 5.5 "Device Timings" and 6.6.5 "Timers". 135 */ 136 #define OTG_TIME_A_WAIT_VRISE 100 /* msec (max) */ 137 #define OTG_TIME_A_WAIT_BCON 1100 /* min 1 second */ 138 #define OTG_TIME_A_AIDL_BDIS 200 /* min 200 msec */ 139 #define OTG_TIME_B_ASE0_BRST 100 /* min 3.125 ms */ 140 141 142 /*************************** REGISTER ACCESS ********************************/ 143 144 /* Endpoint registers (other than dynfifo setup) can be accessed either 145 * directly with the "flat" model, or after setting up an index register. 146 */ 147 148 #if defined(CONFIG_ARCH_DAVINCI) || defined(CONFIG_SOC_OMAP2430) \ 149 || defined(CONFIG_SOC_OMAP3430) || defined(CONFIG_BLACKFIN) \ 150 || defined(CONFIG_ARCH_OMAP4) 151 /* REVISIT indexed access seemed to 152 * misbehave (on DaVinci) for at least peripheral IN ... 153 */ 154 #define MUSB_FLAT_REG 155 #endif 156 157 /* TUSB mapping: "flat" plus ep0 special cases */ 158 #if defined(CONFIG_USB_MUSB_TUSB6010) || \ 159 defined(CONFIG_USB_MUSB_TUSB6010_MODULE) 160 #define musb_ep_select(_mbase, _epnum) \ 161 musb_writeb((_mbase), MUSB_INDEX, (_epnum)) 162 #define MUSB_EP_OFFSET MUSB_TUSB_OFFSET 163 164 /* "flat" mapping: each endpoint has its own i/o address */ 165 #elif defined(MUSB_FLAT_REG) 166 #define musb_ep_select(_mbase, _epnum) (((void)(_mbase)), ((void)(_epnum))) 167 #define MUSB_EP_OFFSET MUSB_FLAT_OFFSET 168 169 /* "indexed" mapping: INDEX register controls register bank select */ 170 #else 171 #define musb_ep_select(_mbase, _epnum) \ 172 musb_writeb((_mbase), MUSB_INDEX, (_epnum)) 173 #define MUSB_EP_OFFSET MUSB_INDEXED_OFFSET 174 #endif 175 176 /****************************** FUNCTIONS ********************************/ 177 178 #define MUSB_HST_MODE(_musb)\ 179 { (_musb)->is_host = true; } 180 #define MUSB_DEV_MODE(_musb) \ 181 { (_musb)->is_host = false; } 182 183 #define test_devctl_hst_mode(_x) \ 184 (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM) 185 186 #define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral") 187 188 /******************************** TYPES *************************************/ 189 190 /** 191 * struct musb_platform_ops - Operations passed to musb_core by HW glue layer 192 * @init: turns on clocks, sets up platform-specific registers, etc 193 * @exit: undoes @init 194 * @set_mode: forcefully changes operating mode 195 * @try_ilde: tries to idle the IP 196 * @vbus_status: returns vbus status if possible 197 * @set_vbus: forces vbus status 198 * @adjust_channel_params: pre check for standard dma channel_program func 199 */ 200 struct musb_platform_ops { 201 int (*init)(struct musb *musb); 202 int (*exit)(struct musb *musb); 203 204 void (*enable)(struct musb *musb); 205 void (*disable)(struct musb *musb); 206 207 int (*set_mode)(struct musb *musb, u8 mode); 208 void (*try_idle)(struct musb *musb, unsigned long timeout); 209 210 int (*vbus_status)(struct musb *musb); 211 void (*set_vbus)(struct musb *musb, int on); 212 213 int (*adjust_channel_params)(struct dma_channel *channel, 214 u16 packet_sz, u8 *mode, 215 dma_addr_t *dma_addr, u32 *len); 216 }; 217 218 /* 219 * struct musb_hw_ep - endpoint hardware (bidirectional) 220 * 221 * Ordered slightly for better cacheline locality. 222 */ 223 struct musb_hw_ep { 224 struct musb *musb; 225 void __iomem *fifo; 226 void __iomem *regs; 227 228 #if defined(CONFIG_USB_MUSB_TUSB6010) || \ 229 defined(CONFIG_USB_MUSB_TUSB6010_MODULE) 230 void __iomem *conf; 231 #endif 232 233 /* index in musb->endpoints[] */ 234 u8 epnum; 235 236 /* hardware configuration, possibly dynamic */ 237 bool is_shared_fifo; 238 bool tx_double_buffered; 239 bool rx_double_buffered; 240 u16 max_packet_sz_tx; 241 u16 max_packet_sz_rx; 242 243 struct dma_channel *tx_channel; 244 struct dma_channel *rx_channel; 245 246 #if defined(CONFIG_USB_MUSB_TUSB6010) || \ 247 defined(CONFIG_USB_MUSB_TUSB6010_MODULE) 248 /* TUSB has "asynchronous" and "synchronous" dma modes */ 249 dma_addr_t fifo_async; 250 dma_addr_t fifo_sync; 251 void __iomem *fifo_sync_va; 252 #endif 253 254 void __iomem *target_regs; 255 256 /* currently scheduled peripheral endpoint */ 257 struct musb_qh *in_qh; 258 struct musb_qh *out_qh; 259 260 u8 rx_reinit; 261 u8 tx_reinit; 262 263 /* peripheral side */ 264 struct musb_ep ep_in; /* TX */ 265 struct musb_ep ep_out; /* RX */ 266 }; 267 268 static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep) 269 { 270 return next_request(&hw_ep->ep_in); 271 } 272 273 static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep) 274 { 275 return next_request(&hw_ep->ep_out); 276 } 277 278 struct musb_csr_regs { 279 /* FIFO registers */ 280 u16 txmaxp, txcsr, rxmaxp, rxcsr; 281 u16 rxfifoadd, txfifoadd; 282 u8 txtype, txinterval, rxtype, rxinterval; 283 u8 rxfifosz, txfifosz; 284 u8 txfunaddr, txhubaddr, txhubport; 285 u8 rxfunaddr, rxhubaddr, rxhubport; 286 }; 287 288 struct musb_context_registers { 289 290 u8 power; 291 u8 intrusbe; 292 u16 frame; 293 u8 index, testmode; 294 295 u8 devctl, busctl, misc; 296 u32 otg_interfsel; 297 298 struct musb_csr_regs index_regs[MUSB_C_NUM_EPS]; 299 }; 300 301 /* 302 * struct musb - Driver instance data. 303 */ 304 struct musb { 305 /* device lock */ 306 spinlock_t lock; 307 308 const struct musb_platform_ops *ops; 309 struct musb_context_registers context; 310 311 irqreturn_t (*isr)(int, void *); 312 struct work_struct irq_work; 313 u16 hwvers; 314 315 u16 intrrxe; 316 u16 intrtxe; 317 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */ 318 #define MUSB_PORT_STAT_RESUME (1 << 31) 319 320 u32 port1_status; 321 322 unsigned long rh_timer; 323 324 enum musb_h_ep0_state ep0_stage; 325 326 /* bulk traffic normally dedicates endpoint hardware, and each 327 * direction has its own ring of host side endpoints. 328 * we try to progress the transfer at the head of each endpoint's 329 * queue until it completes or NAKs too much; then we try the next 330 * endpoint. 331 */ 332 struct musb_hw_ep *bulk_ep; 333 334 struct list_head control; /* of musb_qh */ 335 struct list_head in_bulk; /* of musb_qh */ 336 struct list_head out_bulk; /* of musb_qh */ 337 338 struct timer_list otg_timer; 339 struct notifier_block nb; 340 341 struct dma_controller *dma_controller; 342 343 struct device *controller; 344 void __iomem *ctrl_base; 345 void __iomem *mregs; 346 347 #if defined(CONFIG_USB_MUSB_TUSB6010) || \ 348 defined(CONFIG_USB_MUSB_TUSB6010_MODULE) 349 dma_addr_t async; 350 dma_addr_t sync; 351 void __iomem *sync_va; 352 #endif 353 354 /* passed down from chip/board specific irq handlers */ 355 u8 int_usb; 356 u16 int_rx; 357 u16 int_tx; 358 359 struct usb_phy *xceiv; 360 361 int nIrq; 362 unsigned irq_wake:1; 363 364 struct musb_hw_ep endpoints[MUSB_C_NUM_EPS]; 365 #define control_ep endpoints 366 367 #define VBUSERR_RETRY_COUNT 3 368 u16 vbuserr_retry; 369 u16 epmask; 370 u8 nr_endpoints; 371 372 int (*board_set_power)(int state); 373 374 u8 min_power; /* vbus for periph, in mA/2 */ 375 376 bool is_host; 377 378 int a_wait_bcon; /* VBUS timeout in msecs */ 379 unsigned long idle_timeout; /* Next timeout in jiffies */ 380 381 /* active means connected and not suspended */ 382 unsigned is_active:1; 383 384 unsigned is_multipoint:1; 385 unsigned ignore_disconnect:1; /* during bus resets */ 386 387 unsigned hb_iso_rx:1; /* high bandwidth iso rx? */ 388 unsigned hb_iso_tx:1; /* high bandwidth iso tx? */ 389 unsigned dyn_fifo:1; /* dynamic FIFO supported? */ 390 391 unsigned bulk_split:1; 392 #define can_bulk_split(musb,type) \ 393 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split) 394 395 unsigned bulk_combine:1; 396 #define can_bulk_combine(musb,type) \ 397 (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine) 398 399 /* is_suspended means USB B_PERIPHERAL suspend */ 400 unsigned is_suspended:1; 401 402 /* may_wakeup means remote wakeup is enabled */ 403 unsigned may_wakeup:1; 404 405 /* is_self_powered is reported in device status and the 406 * config descriptor. is_bus_powered means B_PERIPHERAL 407 * draws some VBUS current; both can be true. 408 */ 409 unsigned is_self_powered:1; 410 unsigned is_bus_powered:1; 411 412 unsigned set_address:1; 413 unsigned test_mode:1; 414 unsigned softconnect:1; 415 416 u8 address; 417 u8 test_mode_nr; 418 u16 ackpend; /* ep0 */ 419 enum musb_g_ep0_state ep0_state; 420 struct usb_gadget g; /* the gadget */ 421 struct usb_gadget_driver *gadget_driver; /* its driver */ 422 423 /* 424 * FIXME: Remove this flag. 425 * 426 * This is only added to allow Blackfin to work 427 * with current driver. For some unknown reason 428 * Blackfin doesn't work with double buffering 429 * and that's enabled by default. 430 * 431 * We added this flag to forcefully disable double 432 * buffering until we get it working. 433 */ 434 unsigned double_buffer_not_ok:1; 435 436 struct musb_hdrc_config *config; 437 438 #ifdef MUSB_CONFIG_PROC_FS 439 struct proc_dir_entry *proc_entry; 440 #endif 441 int xceiv_old_state; 442 #ifdef CONFIG_DEBUG_FS 443 struct dentry *debugfs_root; 444 #endif 445 }; 446 447 static inline struct musb *gadget_to_musb(struct usb_gadget *g) 448 { 449 return container_of(g, struct musb, g); 450 } 451 452 #ifdef CONFIG_BLACKFIN 453 static inline int musb_read_fifosize(struct musb *musb, 454 struct musb_hw_ep *hw_ep, u8 epnum) 455 { 456 musb->nr_endpoints++; 457 musb->epmask |= (1 << epnum); 458 459 if (epnum < 5) { 460 hw_ep->max_packet_sz_tx = 128; 461 hw_ep->max_packet_sz_rx = 128; 462 } else { 463 hw_ep->max_packet_sz_tx = 1024; 464 hw_ep->max_packet_sz_rx = 1024; 465 } 466 hw_ep->is_shared_fifo = false; 467 468 return 0; 469 } 470 471 static inline void musb_configure_ep0(struct musb *musb) 472 { 473 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE; 474 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE; 475 musb->endpoints[0].is_shared_fifo = true; 476 } 477 478 #else 479 480 static inline int musb_read_fifosize(struct musb *musb, 481 struct musb_hw_ep *hw_ep, u8 epnum) 482 { 483 void __iomem *mbase = musb->mregs; 484 u8 reg = 0; 485 486 /* read from core using indexed model */ 487 reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE)); 488 /* 0's returned when no more endpoints */ 489 if (!reg) 490 return -ENODEV; 491 492 musb->nr_endpoints++; 493 musb->epmask |= (1 << epnum); 494 495 hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f); 496 497 /* shared TX/RX FIFO? */ 498 if ((reg & 0xf0) == 0xf0) { 499 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx; 500 hw_ep->is_shared_fifo = true; 501 return 0; 502 } else { 503 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4); 504 hw_ep->is_shared_fifo = false; 505 } 506 507 return 0; 508 } 509 510 static inline void musb_configure_ep0(struct musb *musb) 511 { 512 musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE; 513 musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE; 514 musb->endpoints[0].is_shared_fifo = true; 515 } 516 #endif /* CONFIG_BLACKFIN */ 517 518 519 /***************************** Glue it together *****************************/ 520 521 extern const char musb_driver_name[]; 522 523 extern void musb_start(struct musb *musb); 524 extern void musb_stop(struct musb *musb); 525 526 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src); 527 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst); 528 529 extern void musb_load_testpacket(struct musb *); 530 531 extern irqreturn_t musb_interrupt(struct musb *); 532 533 extern void musb_hnp_stop(struct musb *musb); 534 535 static inline void musb_platform_set_vbus(struct musb *musb, int is_on) 536 { 537 if (musb->ops->set_vbus) 538 musb->ops->set_vbus(musb, is_on); 539 } 540 541 static inline void musb_platform_enable(struct musb *musb) 542 { 543 if (musb->ops->enable) 544 musb->ops->enable(musb); 545 } 546 547 static inline void musb_platform_disable(struct musb *musb) 548 { 549 if (musb->ops->disable) 550 musb->ops->disable(musb); 551 } 552 553 static inline int musb_platform_set_mode(struct musb *musb, u8 mode) 554 { 555 if (!musb->ops->set_mode) 556 return 0; 557 558 return musb->ops->set_mode(musb, mode); 559 } 560 561 static inline void musb_platform_try_idle(struct musb *musb, 562 unsigned long timeout) 563 { 564 if (musb->ops->try_idle) 565 musb->ops->try_idle(musb, timeout); 566 } 567 568 static inline int musb_platform_get_vbus_status(struct musb *musb) 569 { 570 if (!musb->ops->vbus_status) 571 return 0; 572 573 return musb->ops->vbus_status(musb); 574 } 575 576 static inline int musb_platform_init(struct musb *musb) 577 { 578 if (!musb->ops->init) 579 return -EINVAL; 580 581 return musb->ops->init(musb); 582 } 583 584 static inline int musb_platform_exit(struct musb *musb) 585 { 586 if (!musb->ops->exit) 587 return -EINVAL; 588 589 return musb->ops->exit(musb); 590 } 591 592 #endif /* __MUSB_CORE_H__ */ 593