1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) 2 /* 3 * hcd.h - DesignWare HS OTG Controller host-mode declarations 4 * 5 * Copyright (C) 2004-2013 Synopsys, Inc. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The names of the above-listed copyright holders may not be used 17 * to endorse or promote products derived from this software without 18 * specific prior written permission. 19 * 20 * ALTERNATIVELY, this software may be distributed under the terms of the 21 * GNU General Public License ("GPL") as published by the Free Software 22 * Foundation; either version 2 of the License, or (at your option) any 23 * later version. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 26 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 27 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 #ifndef __DWC2_HCD_H__ 38 #define __DWC2_HCD_H__ 39 40 /* 41 * This file contains the structures, constants, and interfaces for the 42 * Host Contoller Driver (HCD) 43 * 44 * The Host Controller Driver (HCD) is responsible for translating requests 45 * from the USB Driver into the appropriate actions on the DWC_otg controller. 46 * It isolates the USBD from the specifics of the controller by providing an 47 * API to the USBD. 48 */ 49 50 struct dwc2_qh; 51 52 /** 53 * struct dwc2_host_chan - Software host channel descriptor 54 * 55 * @hc_num: Host channel number, used for register address lookup 56 * @dev_addr: Address of the device 57 * @ep_num: Endpoint of the device 58 * @ep_is_in: Endpoint direction 59 * @speed: Device speed. One of the following values: 60 * - USB_SPEED_LOW 61 * - USB_SPEED_FULL 62 * - USB_SPEED_HIGH 63 * @ep_type: Endpoint type. One of the following values: 64 * - USB_ENDPOINT_XFER_CONTROL: 0 65 * - USB_ENDPOINT_XFER_ISOC: 1 66 * - USB_ENDPOINT_XFER_BULK: 2 67 * - USB_ENDPOINT_XFER_INTR: 3 68 * @max_packet: Max packet size in bytes 69 * @data_pid_start: PID for initial transaction. 70 * 0: DATA0 71 * 1: DATA2 72 * 2: DATA1 73 * 3: MDATA (non-Control EP), 74 * SETUP (Control EP) 75 * @multi_count: Number of additional periodic transactions per 76 * (micro)frame 77 * @xfer_buf: Pointer to current transfer buffer position 78 * @xfer_dma: DMA address of xfer_buf 79 * @xfer_len: Total number of bytes to transfer 80 * @xfer_count: Number of bytes transferred so far 81 * @start_pkt_count: Packet count at start of transfer 82 * @xfer_started: True if the transfer has been started 83 * @ping: True if a PING request should be issued on this channel 84 * @error_state: True if the error count for this transaction is non-zero 85 * @halt_on_queue: True if this channel should be halted the next time a 86 * request is queued for the channel. This is necessary in 87 * slave mode if no request queue space is available when 88 * an attempt is made to halt the channel. 89 * @halt_pending: True if the host channel has been halted, but the core 90 * is not finished flushing queued requests 91 * @do_split: Enable split for the channel 92 * @complete_split: Enable complete split 93 * @hub_addr: Address of high speed hub for the split 94 * @hub_port: Port of the low/full speed device for the split 95 * @xact_pos: Split transaction position. One of the following values: 96 * - DWC2_HCSPLT_XACTPOS_MID 97 * - DWC2_HCSPLT_XACTPOS_BEGIN 98 * - DWC2_HCSPLT_XACTPOS_END 99 * - DWC2_HCSPLT_XACTPOS_ALL 100 * @requests: Number of requests issued for this channel since it was 101 * assigned to the current transfer (not counting PINGs) 102 * @schinfo: Scheduling micro-frame bitmap 103 * @ntd: Number of transfer descriptors for the transfer 104 * @halt_status: Reason for halting the host channel 105 * @hcint Contents of the HCINT register when the interrupt came 106 * @qh: QH for the transfer being processed by this channel 107 * @hc_list_entry: For linking to list of host channels 108 * @desc_list_addr: Current QH's descriptor list DMA address 109 * @desc_list_sz: Current QH's descriptor list size 110 * @split_order_list_entry: List entry for keeping track of the order of splits 111 * 112 * This structure represents the state of a single host channel when acting in 113 * host mode. It contains the data items needed to transfer packets to an 114 * endpoint via a host channel. 115 */ 116 struct dwc2_host_chan { 117 u8 hc_num; 118 119 unsigned dev_addr:7; 120 unsigned ep_num:4; 121 unsigned ep_is_in:1; 122 unsigned speed:4; 123 unsigned ep_type:2; 124 unsigned max_packet:11; 125 unsigned data_pid_start:2; 126 #define DWC2_HC_PID_DATA0 TSIZ_SC_MC_PID_DATA0 127 #define DWC2_HC_PID_DATA2 TSIZ_SC_MC_PID_DATA2 128 #define DWC2_HC_PID_DATA1 TSIZ_SC_MC_PID_DATA1 129 #define DWC2_HC_PID_MDATA TSIZ_SC_MC_PID_MDATA 130 #define DWC2_HC_PID_SETUP TSIZ_SC_MC_PID_SETUP 131 132 unsigned multi_count:2; 133 134 u8 *xfer_buf; 135 dma_addr_t xfer_dma; 136 u32 xfer_len; 137 u32 xfer_count; 138 u16 start_pkt_count; 139 u8 xfer_started; 140 u8 do_ping; 141 u8 error_state; 142 u8 halt_on_queue; 143 u8 halt_pending; 144 u8 do_split; 145 u8 complete_split; 146 u8 hub_addr; 147 u8 hub_port; 148 u8 xact_pos; 149 #define DWC2_HCSPLT_XACTPOS_MID HCSPLT_XACTPOS_MID 150 #define DWC2_HCSPLT_XACTPOS_END HCSPLT_XACTPOS_END 151 #define DWC2_HCSPLT_XACTPOS_BEGIN HCSPLT_XACTPOS_BEGIN 152 #define DWC2_HCSPLT_XACTPOS_ALL HCSPLT_XACTPOS_ALL 153 154 u8 requests; 155 u8 schinfo; 156 u16 ntd; 157 enum dwc2_halt_status halt_status; 158 u32 hcint; 159 struct dwc2_qh *qh; 160 struct list_head hc_list_entry; 161 dma_addr_t desc_list_addr; 162 u32 desc_list_sz; 163 struct list_head split_order_list_entry; 164 }; 165 166 struct dwc2_hcd_pipe_info { 167 u8 dev_addr; 168 u8 ep_num; 169 u8 pipe_type; 170 u8 pipe_dir; 171 u16 mps; 172 }; 173 174 struct dwc2_hcd_iso_packet_desc { 175 u32 offset; 176 u32 length; 177 u32 actual_length; 178 u32 status; 179 }; 180 181 struct dwc2_qtd; 182 183 struct dwc2_hcd_urb { 184 void *priv; 185 struct dwc2_qtd *qtd; 186 void *buf; 187 dma_addr_t dma; 188 void *setup_packet; 189 dma_addr_t setup_dma; 190 u32 length; 191 u32 actual_length; 192 u32 status; 193 u32 error_count; 194 u32 packet_count; 195 u32 flags; 196 u16 interval; 197 struct dwc2_hcd_pipe_info pipe_info; 198 struct dwc2_hcd_iso_packet_desc iso_descs[0]; 199 }; 200 201 /* Phases for control transfers */ 202 enum dwc2_control_phase { 203 DWC2_CONTROL_SETUP, 204 DWC2_CONTROL_DATA, 205 DWC2_CONTROL_STATUS, 206 }; 207 208 /* Transaction types */ 209 enum dwc2_transaction_type { 210 DWC2_TRANSACTION_NONE, 211 DWC2_TRANSACTION_PERIODIC, 212 DWC2_TRANSACTION_NON_PERIODIC, 213 DWC2_TRANSACTION_ALL, 214 }; 215 216 /* The number of elements per LS bitmap (per port on multi_tt) */ 217 #define DWC2_ELEMENTS_PER_LS_BITMAP DIV_ROUND_UP(DWC2_LS_SCHEDULE_SLICES, \ 218 BITS_PER_LONG) 219 220 /** 221 * struct dwc2_tt - dwc2 data associated with a usb_tt 222 * 223 * @refcount: Number of Queue Heads (QHs) holding a reference. 224 * @usb_tt: Pointer back to the official usb_tt. 225 * @periodic_bitmaps: Bitmap for which parts of the 1ms frame are accounted 226 * for already. Each is DWC2_ELEMENTS_PER_LS_BITMAP 227 * elements (so sizeof(long) times that in bytes). 228 * 229 * This structure is stored in the hcpriv of the official usb_tt. 230 */ 231 struct dwc2_tt { 232 int refcount; 233 struct usb_tt *usb_tt; 234 unsigned long periodic_bitmaps[]; 235 }; 236 237 /** 238 * struct dwc2_hs_transfer_time - Info about a transfer on the high speed bus. 239 * 240 * @start_schedule_usecs: The start time on the main bus schedule. Note that 241 * the main bus schedule is tightly packed and this 242 * time should be interpreted as tightly packed (so 243 * uFrame 0 starts at 0 us, uFrame 1 starts at 100 us 244 * instead of 125 us). 245 * @duration_us: How long this transfer goes. 246 */ 247 248 struct dwc2_hs_transfer_time { 249 u32 start_schedule_us; 250 u16 duration_us; 251 }; 252 253 /** 254 * struct dwc2_qh - Software queue head structure 255 * 256 * @hsotg: The HCD state structure for the DWC OTG controller 257 * @ep_type: Endpoint type. One of the following values: 258 * - USB_ENDPOINT_XFER_CONTROL 259 * - USB_ENDPOINT_XFER_BULK 260 * - USB_ENDPOINT_XFER_INT 261 * - USB_ENDPOINT_XFER_ISOC 262 * @ep_is_in: Endpoint direction 263 * @maxp: Value from wMaxPacketSize field of Endpoint Descriptor 264 * @dev_speed: Device speed. One of the following values: 265 * - USB_SPEED_LOW 266 * - USB_SPEED_FULL 267 * - USB_SPEED_HIGH 268 * @data_toggle: Determines the PID of the next data packet for 269 * non-controltransfers. Ignored for control transfers. 270 * One of the following values: 271 * - DWC2_HC_PID_DATA0 272 * - DWC2_HC_PID_DATA1 273 * @ping_state: Ping state 274 * @do_split: Full/low speed endpoint on high-speed hub requires split 275 * @td_first: Index of first activated isochronous transfer descriptor 276 * @td_last: Index of last activated isochronous transfer descriptor 277 * @host_us: Bandwidth in microseconds per transfer as seen by host 278 * @device_us: Bandwidth in microseconds per transfer as seen by device 279 * @host_interval: Interval between transfers as seen by the host. If 280 * the host is high speed and the device is low speed this 281 * will be 8 times device interval. 282 * @device_interval: Interval between transfers as seen by the device. 283 * interval. 284 * @next_active_frame: (Micro)frame _before_ we next need to put something on 285 * the bus. We'll move the qh to active here. If the 286 * host is in high speed mode this will be a uframe. If 287 * the host is in low speed mode this will be a full frame. 288 * @start_active_frame: If we are partway through a split transfer, this will be 289 * what next_active_frame was when we started. Otherwise 290 * it should always be the same as next_active_frame. 291 * @num_hs_transfers: Number of transfers in hs_transfers. 292 * Normally this is 1 but can be more than one for splits. 293 * Always >= 1 unless the host is in low/full speed mode. 294 * @hs_transfers: Transfers that are scheduled as seen by the high speed 295 * bus. Not used if host is in low or full speed mode (but 296 * note that it IS USED if the device is low or full speed 297 * as long as the HOST is in high speed mode). 298 * @ls_start_schedule_slice: Start time (in slices) on the low speed bus 299 * schedule that's being used by this device. This 300 * will be on the periodic_bitmap in a 301 * "struct dwc2_tt". Not used if this device is high 302 * speed. Note that this is in "schedule slice" which 303 * is tightly packed. 304 * @ls_duration_us: Duration on the low speed bus schedule. 305 * @ntd: Actual number of transfer descriptors in a list 306 * @qtd_list: List of QTDs for this QH 307 * @channel: Host channel currently processing transfers for this QH 308 * @qh_list_entry: Entry for QH in either the periodic or non-periodic 309 * schedule 310 * @desc_list: List of transfer descriptors 311 * @desc_list_dma: Physical address of desc_list 312 * @desc_list_sz: Size of descriptors list 313 * @n_bytes: Xfer Bytes array. Each element corresponds to a transfer 314 * descriptor and indicates original XferSize value for the 315 * descriptor 316 * @unreserve_timer: Timer for releasing periodic reservation. 317 * @dwc2_tt: Pointer to our tt info (or NULL if no tt). 318 * @ttport: Port number within our tt. 319 * @tt_buffer_dirty True if clear_tt_buffer_complete is pending 320 * @unreserve_pending: True if we planned to unreserve but haven't yet. 321 * @schedule_low_speed: True if we have a low/full speed component (either the 322 * host is in low/full speed mode or do_split). 323 * 324 * A Queue Head (QH) holds the static characteristics of an endpoint and 325 * maintains a list of transfers (QTDs) for that endpoint. A QH structure may 326 * be entered in either the non-periodic or periodic schedule. 327 */ 328 struct dwc2_qh { 329 struct dwc2_hsotg *hsotg; 330 u8 ep_type; 331 u8 ep_is_in; 332 u16 maxp; 333 u8 dev_speed; 334 u8 data_toggle; 335 u8 ping_state; 336 u8 do_split; 337 u8 td_first; 338 u8 td_last; 339 u16 host_us; 340 u16 device_us; 341 u16 host_interval; 342 u16 device_interval; 343 u16 next_active_frame; 344 u16 start_active_frame; 345 s16 num_hs_transfers; 346 struct dwc2_hs_transfer_time hs_transfers[DWC2_HS_SCHEDULE_UFRAMES]; 347 u32 ls_start_schedule_slice; 348 u16 ntd; 349 struct list_head qtd_list; 350 struct dwc2_host_chan *channel; 351 struct list_head qh_list_entry; 352 struct dwc2_dma_desc *desc_list; 353 dma_addr_t desc_list_dma; 354 u32 desc_list_sz; 355 u32 *n_bytes; 356 struct timer_list unreserve_timer; 357 struct dwc2_tt *dwc_tt; 358 int ttport; 359 unsigned tt_buffer_dirty:1; 360 unsigned unreserve_pending:1; 361 unsigned schedule_low_speed:1; 362 }; 363 364 /** 365 * struct dwc2_qtd - Software queue transfer descriptor (QTD) 366 * 367 * @control_phase: Current phase for control transfers (Setup, Data, or 368 * Status) 369 * @in_process: Indicates if this QTD is currently processed by HW 370 * @data_toggle: Determines the PID of the next data packet for the 371 * data phase of control transfers. Ignored for other 372 * transfer types. One of the following values: 373 * - DWC2_HC_PID_DATA0 374 * - DWC2_HC_PID_DATA1 375 * @complete_split: Keeps track of the current split type for FS/LS 376 * endpoints on a HS Hub 377 * @isoc_split_pos: Position of the ISOC split in full/low speed 378 * @isoc_frame_index: Index of the next frame descriptor for an isochronous 379 * transfer. A frame descriptor describes the buffer 380 * position and length of the data to be transferred in the 381 * next scheduled (micro)frame of an isochronous transfer. 382 * It also holds status for that transaction. The frame 383 * index starts at 0. 384 * @isoc_split_offset: Position of the ISOC split in the buffer for the 385 * current frame 386 * @ssplit_out_xfer_count: How many bytes transferred during SSPLIT OUT 387 * @error_count: Holds the number of bus errors that have occurred for 388 * a transaction within this transfer 389 * @n_desc: Number of DMA descriptors for this QTD 390 * @isoc_frame_index_last: Last activated frame (packet) index, used in 391 * descriptor DMA mode only 392 * @urb: URB for this transfer 393 * @qh: Queue head for this QTD 394 * @qtd_list_entry: For linking to the QH's list of QTDs 395 * 396 * A Queue Transfer Descriptor (QTD) holds the state of a bulk, control, 397 * interrupt, or isochronous transfer. A single QTD is created for each URB 398 * (of one of these types) submitted to the HCD. The transfer associated with 399 * a QTD may require one or multiple transactions. 400 * 401 * A QTD is linked to a Queue Head, which is entered in either the 402 * non-periodic or periodic schedule for execution. When a QTD is chosen for 403 * execution, some or all of its transactions may be executed. After 404 * execution, the state of the QTD is updated. The QTD may be retired if all 405 * its transactions are complete or if an error occurred. Otherwise, it 406 * remains in the schedule so more transactions can be executed later. 407 */ 408 struct dwc2_qtd { 409 enum dwc2_control_phase control_phase; 410 u8 in_process; 411 u8 data_toggle; 412 u8 complete_split; 413 u8 isoc_split_pos; 414 u16 isoc_frame_index; 415 u16 isoc_split_offset; 416 u16 isoc_td_last; 417 u16 isoc_td_first; 418 u32 ssplit_out_xfer_count; 419 u8 error_count; 420 u8 n_desc; 421 u16 isoc_frame_index_last; 422 struct dwc2_hcd_urb *urb; 423 struct dwc2_qh *qh; 424 struct list_head qtd_list_entry; 425 }; 426 427 #ifdef DEBUG 428 struct hc_xfer_info { 429 struct dwc2_hsotg *hsotg; 430 struct dwc2_host_chan *chan; 431 }; 432 #endif 433 434 u32 dwc2_calc_frame_interval(struct dwc2_hsotg *hsotg); 435 436 /* Gets the struct usb_hcd that contains a struct dwc2_hsotg */ 437 static inline struct usb_hcd *dwc2_hsotg_to_hcd(struct dwc2_hsotg *hsotg) 438 { 439 return (struct usb_hcd *)hsotg->priv; 440 } 441 442 /* 443 * Inline used to disable one channel interrupt. Channel interrupts are 444 * disabled when the channel is halted or released by the interrupt handler. 445 * There is no need to handle further interrupts of that type until the 446 * channel is re-assigned. In fact, subsequent handling may cause crashes 447 * because the channel structures are cleaned up when the channel is released. 448 */ 449 static inline void disable_hc_int(struct dwc2_hsotg *hsotg, int chnum, u32 intr) 450 { 451 u32 mask = dwc2_readl(hsotg->regs + HCINTMSK(chnum)); 452 453 mask &= ~intr; 454 dwc2_writel(mask, hsotg->regs + HCINTMSK(chnum)); 455 } 456 457 void dwc2_hc_cleanup(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan); 458 void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan, 459 enum dwc2_halt_status halt_status); 460 void dwc2_hc_start_transfer_ddma(struct dwc2_hsotg *hsotg, 461 struct dwc2_host_chan *chan); 462 463 /* 464 * Reads HPRT0 in preparation to modify. It keeps the WC bits 0 so that if they 465 * are read as 1, they won't clear when written back. 466 */ 467 static inline u32 dwc2_read_hprt0(struct dwc2_hsotg *hsotg) 468 { 469 u32 hprt0 = dwc2_readl(hsotg->regs + HPRT0); 470 471 hprt0 &= ~(HPRT0_ENA | HPRT0_CONNDET | HPRT0_ENACHG | HPRT0_OVRCURRCHG); 472 return hprt0; 473 } 474 475 static inline u8 dwc2_hcd_get_ep_num(struct dwc2_hcd_pipe_info *pipe) 476 { 477 return pipe->ep_num; 478 } 479 480 static inline u8 dwc2_hcd_get_pipe_type(struct dwc2_hcd_pipe_info *pipe) 481 { 482 return pipe->pipe_type; 483 } 484 485 static inline u16 dwc2_hcd_get_mps(struct dwc2_hcd_pipe_info *pipe) 486 { 487 return pipe->mps; 488 } 489 490 static inline u8 dwc2_hcd_get_dev_addr(struct dwc2_hcd_pipe_info *pipe) 491 { 492 return pipe->dev_addr; 493 } 494 495 static inline u8 dwc2_hcd_is_pipe_isoc(struct dwc2_hcd_pipe_info *pipe) 496 { 497 return pipe->pipe_type == USB_ENDPOINT_XFER_ISOC; 498 } 499 500 static inline u8 dwc2_hcd_is_pipe_int(struct dwc2_hcd_pipe_info *pipe) 501 { 502 return pipe->pipe_type == USB_ENDPOINT_XFER_INT; 503 } 504 505 static inline u8 dwc2_hcd_is_pipe_bulk(struct dwc2_hcd_pipe_info *pipe) 506 { 507 return pipe->pipe_type == USB_ENDPOINT_XFER_BULK; 508 } 509 510 static inline u8 dwc2_hcd_is_pipe_control(struct dwc2_hcd_pipe_info *pipe) 511 { 512 return pipe->pipe_type == USB_ENDPOINT_XFER_CONTROL; 513 } 514 515 static inline u8 dwc2_hcd_is_pipe_in(struct dwc2_hcd_pipe_info *pipe) 516 { 517 return pipe->pipe_dir == USB_DIR_IN; 518 } 519 520 static inline u8 dwc2_hcd_is_pipe_out(struct dwc2_hcd_pipe_info *pipe) 521 { 522 return !dwc2_hcd_is_pipe_in(pipe); 523 } 524 525 int dwc2_hcd_init(struct dwc2_hsotg *hsotg); 526 void dwc2_hcd_remove(struct dwc2_hsotg *hsotg); 527 528 /* Transaction Execution Functions */ 529 enum dwc2_transaction_type dwc2_hcd_select_transactions( 530 struct dwc2_hsotg *hsotg); 531 void dwc2_hcd_queue_transactions(struct dwc2_hsotg *hsotg, 532 enum dwc2_transaction_type tr_type); 533 534 /* Schedule Queue Functions */ 535 /* Implemented in hcd_queue.c */ 536 struct dwc2_qh *dwc2_hcd_qh_create(struct dwc2_hsotg *hsotg, 537 struct dwc2_hcd_urb *urb, 538 gfp_t mem_flags); 539 void dwc2_hcd_qh_free(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh); 540 int dwc2_hcd_qh_add(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh); 541 void dwc2_hcd_qh_unlink(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh); 542 void dwc2_hcd_qh_deactivate(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 543 int sched_csplit); 544 545 void dwc2_hcd_qtd_init(struct dwc2_qtd *qtd, struct dwc2_hcd_urb *urb); 546 int dwc2_hcd_qtd_add(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd, 547 struct dwc2_qh *qh); 548 549 /* Unlinks and frees a QTD */ 550 static inline void dwc2_hcd_qtd_unlink_and_free(struct dwc2_hsotg *hsotg, 551 struct dwc2_qtd *qtd, 552 struct dwc2_qh *qh) 553 { 554 list_del(&qtd->qtd_list_entry); 555 kfree(qtd); 556 qtd = NULL; 557 } 558 559 /* Descriptor DMA support functions */ 560 void dwc2_hcd_start_xfer_ddma(struct dwc2_hsotg *hsotg, 561 struct dwc2_qh *qh); 562 void dwc2_hcd_complete_xfer_ddma(struct dwc2_hsotg *hsotg, 563 struct dwc2_host_chan *chan, int chnum, 564 enum dwc2_halt_status halt_status); 565 566 int dwc2_hcd_qh_init_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh, 567 gfp_t mem_flags); 568 void dwc2_hcd_qh_free_ddma(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh); 569 570 /* Check if QH is non-periodic */ 571 #define dwc2_qh_is_non_per(_qh_ptr_) \ 572 ((_qh_ptr_)->ep_type == USB_ENDPOINT_XFER_BULK || \ 573 (_qh_ptr_)->ep_type == USB_ENDPOINT_XFER_CONTROL) 574 575 #ifdef CONFIG_USB_DWC2_DEBUG_PERIODIC 576 static inline bool dbg_hc(struct dwc2_host_chan *hc) { return true; } 577 static inline bool dbg_qh(struct dwc2_qh *qh) { return true; } 578 static inline bool dbg_urb(struct urb *urb) { return true; } 579 static inline bool dbg_perio(void) { return true; } 580 #else /* !CONFIG_USB_DWC2_DEBUG_PERIODIC */ 581 static inline bool dbg_hc(struct dwc2_host_chan *hc) 582 { 583 return hc->ep_type == USB_ENDPOINT_XFER_BULK || 584 hc->ep_type == USB_ENDPOINT_XFER_CONTROL; 585 } 586 587 static inline bool dbg_qh(struct dwc2_qh *qh) 588 { 589 return qh->ep_type == USB_ENDPOINT_XFER_BULK || 590 qh->ep_type == USB_ENDPOINT_XFER_CONTROL; 591 } 592 593 static inline bool dbg_urb(struct urb *urb) 594 { 595 return usb_pipetype(urb->pipe) == PIPE_BULK || 596 usb_pipetype(urb->pipe) == PIPE_CONTROL; 597 } 598 599 static inline bool dbg_perio(void) { return false; } 600 #endif 601 602 /* High bandwidth multiplier as encoded in highspeed endpoint descriptors */ 603 #define dwc2_hb_mult(wmaxpacketsize) (1 + (((wmaxpacketsize) >> 11) & 0x03)) 604 605 /* Packet size for any kind of endpoint descriptor */ 606 #define dwc2_max_packet(wmaxpacketsize) ((wmaxpacketsize) & 0x07ff) 607 608 /* 609 * Returns true if frame1 index is greater than frame2 index. The comparison 610 * is done modulo FRLISTEN_64_SIZE. This accounts for the rollover of the 611 * frame number when the max index frame number is reached. 612 */ 613 static inline bool dwc2_frame_idx_num_gt(u16 fr_idx1, u16 fr_idx2) 614 { 615 u16 diff = fr_idx1 - fr_idx2; 616 u16 sign = diff & (FRLISTEN_64_SIZE >> 1); 617 618 return diff && !sign; 619 } 620 621 /* 622 * Returns true if frame1 is less than or equal to frame2. The comparison is 623 * done modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the 624 * frame number when the max frame number is reached. 625 */ 626 static inline int dwc2_frame_num_le(u16 frame1, u16 frame2) 627 { 628 return ((frame2 - frame1) & HFNUM_MAX_FRNUM) <= (HFNUM_MAX_FRNUM >> 1); 629 } 630 631 /* 632 * Returns true if frame1 is greater than frame2. The comparison is done 633 * modulo HFNUM_MAX_FRNUM. This accounts for the rollover of the frame 634 * number when the max frame number is reached. 635 */ 636 static inline int dwc2_frame_num_gt(u16 frame1, u16 frame2) 637 { 638 return (frame1 != frame2) && 639 ((frame1 - frame2) & HFNUM_MAX_FRNUM) < (HFNUM_MAX_FRNUM >> 1); 640 } 641 642 /* 643 * Increments frame by the amount specified by inc. The addition is done 644 * modulo HFNUM_MAX_FRNUM. Returns the incremented value. 645 */ 646 static inline u16 dwc2_frame_num_inc(u16 frame, u16 inc) 647 { 648 return (frame + inc) & HFNUM_MAX_FRNUM; 649 } 650 651 static inline u16 dwc2_frame_num_dec(u16 frame, u16 dec) 652 { 653 return (frame + HFNUM_MAX_FRNUM + 1 - dec) & HFNUM_MAX_FRNUM; 654 } 655 656 static inline u16 dwc2_full_frame_num(u16 frame) 657 { 658 return (frame & HFNUM_MAX_FRNUM) >> 3; 659 } 660 661 static inline u16 dwc2_micro_frame_num(u16 frame) 662 { 663 return frame & 0x7; 664 } 665 666 /* 667 * Returns the Core Interrupt Status register contents, ANDed with the Core 668 * Interrupt Mask register contents 669 */ 670 static inline u32 dwc2_read_core_intr(struct dwc2_hsotg *hsotg) 671 { 672 return dwc2_readl(hsotg->regs + GINTSTS) & 673 dwc2_readl(hsotg->regs + GINTMSK); 674 } 675 676 static inline u32 dwc2_hcd_urb_get_status(struct dwc2_hcd_urb *dwc2_urb) 677 { 678 return dwc2_urb->status; 679 } 680 681 static inline u32 dwc2_hcd_urb_get_actual_length( 682 struct dwc2_hcd_urb *dwc2_urb) 683 { 684 return dwc2_urb->actual_length; 685 } 686 687 static inline u32 dwc2_hcd_urb_get_error_count(struct dwc2_hcd_urb *dwc2_urb) 688 { 689 return dwc2_urb->error_count; 690 } 691 692 static inline void dwc2_hcd_urb_set_iso_desc_params( 693 struct dwc2_hcd_urb *dwc2_urb, int desc_num, u32 offset, 694 u32 length) 695 { 696 dwc2_urb->iso_descs[desc_num].offset = offset; 697 dwc2_urb->iso_descs[desc_num].length = length; 698 } 699 700 static inline u32 dwc2_hcd_urb_get_iso_desc_status( 701 struct dwc2_hcd_urb *dwc2_urb, int desc_num) 702 { 703 return dwc2_urb->iso_descs[desc_num].status; 704 } 705 706 static inline u32 dwc2_hcd_urb_get_iso_desc_actual_length( 707 struct dwc2_hcd_urb *dwc2_urb, int desc_num) 708 { 709 return dwc2_urb->iso_descs[desc_num].actual_length; 710 } 711 712 static inline int dwc2_hcd_is_bandwidth_allocated(struct dwc2_hsotg *hsotg, 713 struct usb_host_endpoint *ep) 714 { 715 struct dwc2_qh *qh = ep->hcpriv; 716 717 if (qh && !list_empty(&qh->qh_list_entry)) 718 return 1; 719 720 return 0; 721 } 722 723 static inline u16 dwc2_hcd_get_ep_bandwidth(struct dwc2_hsotg *hsotg, 724 struct usb_host_endpoint *ep) 725 { 726 struct dwc2_qh *qh = ep->hcpriv; 727 728 if (!qh) { 729 WARN_ON(1); 730 return 0; 731 } 732 733 return qh->host_us; 734 } 735 736 void dwc2_hcd_save_data_toggle(struct dwc2_hsotg *hsotg, 737 struct dwc2_host_chan *chan, int chnum, 738 struct dwc2_qtd *qtd); 739 740 /* HCD Core API */ 741 742 /** 743 * dwc2_handle_hcd_intr() - Called on every hardware interrupt 744 * 745 * @hsotg: The DWC2 HCD 746 * 747 * Returns IRQ_HANDLED if interrupt is handled 748 * Return IRQ_NONE if interrupt is not handled 749 */ 750 irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg); 751 752 /** 753 * dwc2_hcd_stop() - Halts the DWC_otg host mode operation 754 * 755 * @hsotg: The DWC2 HCD 756 */ 757 void dwc2_hcd_stop(struct dwc2_hsotg *hsotg); 758 759 /** 760 * dwc2_hcd_is_b_host() - Returns 1 if core currently is acting as B host, 761 * and 0 otherwise 762 * 763 * @hsotg: The DWC2 HCD 764 */ 765 int dwc2_hcd_is_b_host(struct dwc2_hsotg *hsotg); 766 767 /** 768 * dwc2_hcd_dump_state() - Dumps hsotg state 769 * 770 * @hsotg: The DWC2 HCD 771 * 772 * NOTE: This function will be removed once the peripheral controller code 773 * is integrated and the driver is stable 774 */ 775 void dwc2_hcd_dump_state(struct dwc2_hsotg *hsotg); 776 777 /** 778 * dwc2_hcd_dump_frrem() - Dumps the average frame remaining at SOF 779 * 780 * @hsotg: The DWC2 HCD 781 * 782 * This can be used to determine average interrupt latency. Frame remaining is 783 * also shown for start transfer and two additional sample points. 784 * 785 * NOTE: This function will be removed once the peripheral controller code 786 * is integrated and the driver is stable 787 */ 788 void dwc2_hcd_dump_frrem(struct dwc2_hsotg *hsotg); 789 790 /* URB interface */ 791 792 /* Transfer flags */ 793 #define URB_GIVEBACK_ASAP 0x1 794 #define URB_SEND_ZERO_PACKET 0x2 795 796 /* Host driver callbacks */ 797 struct dwc2_tt *dwc2_host_get_tt_info(struct dwc2_hsotg *hsotg, 798 void *context, gfp_t mem_flags, 799 int *ttport); 800 801 void dwc2_host_put_tt_info(struct dwc2_hsotg *hsotg, 802 struct dwc2_tt *dwc_tt); 803 int dwc2_host_get_speed(struct dwc2_hsotg *hsotg, void *context); 804 void dwc2_host_complete(struct dwc2_hsotg *hsotg, struct dwc2_qtd *qtd, 805 int status); 806 807 #ifdef DEBUG 808 /* 809 * Macro to sample the remaining PHY clocks left in the current frame. This 810 * may be used during debugging to determine the average time it takes to 811 * execute sections of code. There are two possible sample points, "a" and 812 * "b", so the _letter_ argument must be one of these values. 813 * 814 * To dump the average sample times, read the "hcd_frrem" sysfs attribute. For 815 * example, "cat /sys/devices/lm0/hcd_frrem". 816 */ 817 #define dwc2_sample_frrem(_hcd_, _qh_, _letter_) \ 818 do { \ 819 struct hfnum_data _hfnum_; \ 820 struct dwc2_qtd *_qtd_; \ 821 \ 822 _qtd_ = list_entry((_qh_)->qtd_list.next, struct dwc2_qtd, \ 823 qtd_list_entry); \ 824 if (usb_pipeint(_qtd_->urb->pipe) && \ 825 (_qh_)->start_active_frame != 0 && !_qtd_->complete_split) { \ 826 _hfnum_.d32 = dwc2_readl((_hcd_)->regs + HFNUM); \ 827 switch (_hfnum_.b.frnum & 0x7) { \ 828 case 7: \ 829 (_hcd_)->hfnum_7_samples_##_letter_++; \ 830 (_hcd_)->hfnum_7_frrem_accum_##_letter_ += \ 831 _hfnum_.b.frrem; \ 832 break; \ 833 case 0: \ 834 (_hcd_)->hfnum_0_samples_##_letter_++; \ 835 (_hcd_)->hfnum_0_frrem_accum_##_letter_ += \ 836 _hfnum_.b.frrem; \ 837 break; \ 838 default: \ 839 (_hcd_)->hfnum_other_samples_##_letter_++; \ 840 (_hcd_)->hfnum_other_frrem_accum_##_letter_ += \ 841 _hfnum_.b.frrem; \ 842 break; \ 843 } \ 844 } \ 845 } while (0) 846 #else 847 #define dwc2_sample_frrem(_hcd_, _qh_, _letter_) do {} while (0) 848 #endif 849 850 #endif /* __DWC2_HCD_H__ */ 851